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Vazirian, Marjan. "Colour characterisation of LCD display systems." Thesis, University of Leeds, 2018. http://etheses.whiterose.ac.uk/20850/.
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The main purpose of this research is to study the colour characterisation of digital display systems. Three distinct models for characterisation (GOG, PLCC and PLVC) are evaluated and compared and for two of these models (GOG and PLCC) two different sets of linearisation samples (either colour-ramps or grey-ramp samples) are used to perform the linearisation. To evaluate these models’ colorimetric measurements are made for 20 different display devices and colour characterization performance is reported as the main measure. Characterisation performance is calculated using several sets of samples including the widely used Macbeth ColorChecker chart and two new charts called Chart4 and Matlab60 (one of which was based on a method previously published by Cheung and Westland and another was based on a new method). A key aspect of this work is that all 256 levels of intensity were measured for the colour-ramps and for the grey-ramp linearisation samples for each of the 20 displays to allow subsampling of these data to explore the effect of the number of linearisation samples on characterisation performance. When the number of linearisation samples used was small (less than 10) the GOG model sometimes resulted in the smallest characterisation colour differences. However, for the PLCC and PLVC models performance tended to increase with the number of linearization samples and both of these models outperformed GOG with more 10 linearisation samples. For the PLCC model, better performance was usually obtained using the grey-ramp linearisation samples rather than using the colour-ramps linearization samples. It was possible, for each of the 20 displays, to reach average ab values that are less than 1.5 (ab <1.5, 90%) or ab < 1.0 (75%); however, the model that yields the best performance is difficult to ascertain in advance (a good strategy would be to evaluate all five models and select the one that performs best for the characterisation of any particular display). However, in the majority of cases, lowest colour differences (ab) were obtained using the PLCC model and all 256 of the grey-ramp samples for linearisation. This work has compared the performance of five different models using a large number of displays and has allowed a number of recommendations to be made about display characterisation. Although the majority of the work in this thesis was based on stationary displays the effect of motion on characterization performance was also explored. This is important since moving images are now commonplace in many applications. The results showed that a moving background has a small, but statistically significant, effect on the colour of patches.
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Hartmann, Lukáš. "Rozhraní mezi LCD maticovým a grafickým displejem." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2019. http://www.nusl.cz/ntk/nusl-400538.
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This work describes design interface between matrix with controller HD44780 and graphic LCD. This device replace 2x20, 4x20, 4x40 character display. Character which should be displayed are send through a parallel interface, such as matrix display, or send through SPI bus. Communication line RS-485 are used for set language character set. Language character sets are saved into external flash memory.
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Cepl, Miroslav. "Návrh a realizace ovladače LCD displaye pro Raspberry Pi." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-220548.
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The aim of the course work is to design and implement a driver for touchscreen LCD display. The premise of the connection the display to the microcontroller using the I2C bus and use MCP23017 circuits. Raspberry Pi B + will be used for communication with circuits MCP23017 via I2C bus. Display TFT_320QVT will be connected to the outputs of extension circuits MCP23017. Part of the display complete is also a touchscreen with XPT2046 controller. Raspberry Pi runs on Raspbian system based on the Debian Linux distribution. The driver will serve to communicate and display information on the screen. The complete will be useable for applications such as selecting settings and show main information on the display.
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Růžička, Jakub. "Zpracování signálu obrazových senzorů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-221025.
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This diploma thesis deals with an image capturing by a CMOS image sensor and controlling of graphical LCD displays using specialized integrated circuits. A theoretical research on the topic and design of the system designed for ease of processing, transmitting and still images displaying based on this research is described in this work. The output of the work is complete the device realized.
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Peters, Stuart Richard. "Competition and technological change in the liquid crystal display (LCD) industry." Thesis, Brunel University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327114.
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Tavares, Viviane. "Caracterização e processamento de telas de cristal líquido visando a reciclagem." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/3/3133/tde-22032007-150914/.
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As telas de cristal líquido (LCD) são usadas em TVs, calculadoras, telefones celulares, computadores (laptop e palm), vídeo games e agendas eletrônicas. O aumento e a rápida obsolescência tecnológica desses dispositivos eletrônicos causa o descarte excessivo de LCDs usados, diminuindo a vida útil de aterros. Por isso é necessário o desenvolvimento de uma metodologia de reciclagem de LCDs, que deve ser iniciada pela caracterização de LCDs, seguida do processamento das telas com objetivo de separar os materiais, utilizando algumas técnicas de Tratamento de Minérios. Os ensaios realizados para caracterização dos componentes da tela foram: solubilização em solvente; chama; infravermelho; DSC; MEV com EDS; difração de raios-X; e perda ao fogo. A seqüência identificada dos materiais de fora para dentro foi: triacetato de celulose, poli (álcool) vinil dopado com iodo, triacetato de celulose, cristal líquido, vidro com ITO, triacetato de celulose, poli (álcool) vinil dopado com iodo, triacetato de celulose, polímero não identificado com mica. Após a caracterização foi realizada a etapa de liberação de materiais, utilizando-se de moinhos de rolos, de disco, de martelos, de bolas, separação por álcool, imersão em nitrogênio líquido, e solubilização em água, para separação dos materiais recicláveis. A operação de Tratamento de Minérios que apresentou cerca de 98% de separação dos materiais foi com o moinho de martelos. Este material pode ser usado eventualmente como substituto da areia. Para viabilizar a separação dos materiais existe a necessidade de alteração no projeto das LCDs.Liquid crystal displays (LCD) are used in TVs, calculators, mobiles, computers (laptop and palm), video games and electronic agendas. The increasing and fast technological obsolescence of these electronic devices causes their extreme discard, decreasing the landfills useful life. Therefore it is necessary the development of a LCD recycling methodology which must be started by the LCDs characterization, followed by the displays processing with the objective of separating materials, using some Ore Treatment techniques. The characterization tests of the LDC components: solvent solubilization, flame, infrarred, DSC, MEV with coupled EDS, X-ray diffraction and loss on fire. The sequence of the identified materials were: celulose triacetate, poly vinyl alcohol with iodine, cellulose triacetate, liquid cristal, ITO glass, cellulose triacetate, poly vinyl alcohol with iodine, cellulose triacetate, polymer with muscovite. Following the characterization, the materials releasing step was performed. Firstly the LCDs were grinded using different kinds of mills, then the grinded materials were passed through several separation tests: separation on alcohol, immersion in liquid nitrogen and solubilization in water. Hammer milling present the best results. The project of the LCDs should be improved in order to allow the materials separation.
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Pagáč, Radek. "Modernizace klimatizační komory." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228600.
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The target of this work is to modernize air-conditioning control of the unit Thermal Chamber. The old air-conditioning unit will be renewed by replacing old one by new one, microcontroller-driven control unit, trough which it will be possible to show the current and desired temperature LCD. Theoretically description of the components and methods of measuring the temperature and environment for the creation of the microcontroller is shown before construction.
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Pajskr, Jaroslav. "Přídavný displej LCD k laboratornímu přípravku s programovatelným obvodem." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217668.
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The main part of the digital application is its user interface. Users can check the status of the programme or change its state. There are many ways to obtain a suitable interface. During the design stage the simplest interface is chosen that provides the necessary functions. In most cases the interface contains a display. This diploma thesis deals with the design of an extension board to plug in a display to a programmable device, a control algorithm for the display and the design of a simple display interface. There are two ways to design software. The first of them is achieved by the processor PicoBlaze, which contains all the required functions. The second solution is by the state machine written in VHDL language. Both solutions can be used in the same way, but the latter solution is quicker and requires less hardware resources.
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Klubal, Ondřej. "Grafická knihovna pro dotykový LCD." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2012. http://www.nusl.cz/ntk/nusl-236534.
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This work deals with description of graphic library for a touch screen educational kit with a microcontroller from Freescale. Part of this library is a driver that accelerates gradient rendering and supports reading from video RAM. The library allows inserting images with transparency and their upscaling. Multiple fonts are also supported. Fonts can be upscaled and their weight can be set.
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Gundala, Srivatsa. "Creating a Portable Wireless Display." ScholarWorks@UNO, 2003. http://scholarworks.uno.edu/td/50.
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Real time computing has become a vital part in military applications. Moreover certain operations require that the soldiers carry computing devices to assist them. These devices, besides providing them with location-based information, should also be transmitting the requested data. In this thesis, we present a portable wireless display prototype, which renders the desktop of a remote computer. The prototype functions under the range of an 802.11b or Bluetooth wireless network. The Software interfacing is done with Virtual Network Computing (VNC). This thesis is a first step towards analyzing and creating head/wrist mounted displays capable of transmitting images from a remote computer. The thesis starts with an overview and proceeds with a discussion on the concepts involved behind the functioning of the prototype. It then provides a detailed description of the how the prototype was built, followed by a performance test and its analysis and concludes by summarizing the results achieved.
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Gustafsson, Carl Johan. "VHDL-implementering av drivkrets för en alfanumerisk display." Thesis, Jönköping University, JTH, Computer and Electrical Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-7667.
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Allting började med att jag fick i uppdrag av Euromaint Industry i Skövde att konstruera en alfanumerisk display i syfte att ersätta en utgången display som inte längre nytillverkas. Jag fick i uppdrag att välja ut en modern, lämplig grafisk display och bygga ett interface mellan den nya displayen och den industriella maskin som displayen skall sitta på. Efter att ha letat hos någraelektronikleverantörer kom jag fram till att en TFT-skärm från det japanska företaget Kyocera var den som passade bäst. Skärmen hade ett VGA-liknandeinterface och min uppgift blev att sätta mig in i hur VGA fungerar. Efter att ha konstaterat att det krävdes en snabbare krets än en microcontroller för att använda VGA, var det endast en programmerbar logikkrets, en FPGA, som gällde. Denna FPGA sköter nu ensam om såväl VGA-interfacet som inläsningen av informationen från den industriella NC-maskinen.
Everything started when I got a task from Euromaint Industry in Skövde, Sweden, to develop an alphanumerical display that could replace an old one, which was sold out. I got a task to choose a modern, suitable, graphical display and develop an interface between the new display and the industrial machine, which the old one was connected to. I have searched for a display at some suppliers of electronic components and I have found a TFT-display from the Japanese company Kyocera. The display had an interface similar to VGA so I had to study VGA to see how it works. Then I realized that I needed a faster circuit than a microcontroller. Then I chose a programmable logic circuit, an FPGA, to control the VGA-sweep. Today the FPGA-circuit controls the whole system.
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Frecer, Petr. "Radiokomunikační monitor pro ISM pásmo 868 MHz." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219885.
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This thesis deals with the design and the realization of the radiocommunication monitor for the 868 MHz band. In the thesis, a description of licence-free radio bands complying ITU recommendations and ETSI standards is given. A special attention is paid to the 863 MHz - 870 MHz band. The transceiver CC1020 that forms the base for the monitor is described in detail. The circuit design, the monitor assembly and the firmware creation are presented step by step. The radiocommunication monitor is portable and battery powered. The monitor is able to display RF signals in the 868 MHz band, to indicate the frequency error of the transmitter and to receive FSK modulated signal. Demodulated data can be transferred to the personal computer via the USB.
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Nevoral, Jan. "Ovládací panel s dotykovým displejem." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2015. http://www.nusl.cz/ntk/nusl-234988.
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The aim of this work is to design and construct a printed circuit board with touchscreen connection that will serve as a universal platform for controlling a variety of devices including industrial devices. The functionality of the board is demonstrated on control of gas boiler application. The first part attends to currently used and available graphic displays, touchscreens, communication interfaces and microcontrollers that allow control of a graphic display. The main focus is put on LCD TFT displays, resistive touch panels and microcontrollers with LCD TFT controller. The second part describes the selection of system components, design of printed circuit board and implementation of thermostat. The end of the work evaluates the produced device and discusses possible future extensions.
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Bartošík, Vladislav. "Řízení grafického OLED displeje mikrokontrolérem Atmel." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218559.
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This Master's thesis deals with design and a realisation of a device controlling an OLED display, Densitron DD-25664-1A. This display has a resolution of 256 x 64 pixels and allows displaying of 4-bit grayscale. The proposed utility software implements the initialization and termination functions, two sets of fonts { Latin and Greek letters and functions for rendering graphics and text. The result of the project is a device with the controlling software.
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Shi, Jianan. "Design and Implementation of an Alcohol Meter." Thesis, Högskolan i Gävle, Avdelningen för elektronik, matematik och naturvetenskap, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-15059.
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With the development of economy, more and more cars appear in the roads. Many drivers ignore thedanger about driving after drinking so that drunk driving causes a large number of traffic accidents allaround the world. By now, alcohol has killed a lot of people in the world. To reduce accidents causedby drunk driving, make certain the alcohol content in driver's body would help a lot, and it is related toalcohol concentration measuring and relevant instrument.In this thesis work, the design of a simple alcohol meter was present. The designed system iscomposed of a gas sensor (TGS-822) working circuit, microcontroller PIC16F690 and LCD display.The system collects the electronic signals caused by resistance changes in gas sensor (TGS-822) froma built-in Analog-to-Digital Converter (A/D) in microcontroller PIC16F690, programs withPIC16F690, and displays alcohol concentration in LCD display finally. The measuring concentrationrange of the designed alcohol meter is from 50PPM to 5000PPM. This paper describes the datacollection, processing and display of the designed alcohol meter in detail. And lastly, the authordiscussed about the advantages and disadvantages of the designed alcohol meter, it could beconsidered as a guideline for further work.
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Vozák, Petr. "Systém pro řízení informačních tabulí." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2007. http://www.nusl.cz/ntk/nusl-412758.
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This paper deals with design and implementation of the information table control system. It is designed using UML model language and Rational Rose development tool. System implementation is based on the modern Microsoft .NET Framework component.
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Majerčík, Miloš. "Ovládání periférií webovým rozhraním systému s 8 bit. mikroprocesorem." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217720.
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This diploma thesis deals with description and subsequent implementation of web interface and control device for selected periphery devices through the use of processor module RabbitCore RCM3700 which is based on microprocessor Rabbit 3000. The importance of web interface based control is currently raised because of higher customers’ claims. Interactivity of these devices contains wide range of services, from simple event communication by text messages to complex driving systems for home which create the base of intelligent house. The customer can choose either the complete and more expensive solution or self-created one. There are two possible ways of creation. The first way is through the use of personal computer. The second one, more complex but also more effective, is by single-chip microprocessor. In this thesis the second one way is used. The module with processor with build-in web interface was used. Description and the way of control are given for this module and also for selected periphery devices, the LCD and digital temperature sensors. At the end the hardware and software part of control device is designed on the basis of gained information. The thesis contains also its brief description.
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Burda, Petr. "Dvojčinný laboratorní spínaný zdroj se symetrickým výstupem." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220078.
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Laboratory push – pull switching power supply with symetrical output 2x0-30 V/5 A, primarily through adjustable controls (buttons, rotary encoder position) and then displayed on the alphanumeric LCD display. Management and communication device between the user and the power supply of the microcontroller ATmega32 - 16PU.
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Štens, Radovan. "Termostat pro biologické experimenty." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218417.
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Master's thesis deals with a design of the thermostat for biological experiments considering 2l of volume, with capability of setting up required temperature between 20-40 degree Celsius and related accuracy of measurement +/- 1 degree Celsius. Following chapters are one by one described and properly explained from possible ways of measuring temperature to final implementation. Result of the thesis presents necessarily calculations, discussion of module's performance modeling, schematics together with PCB's design and the list of components. Neither the question of software nor possibilities of realization is neglected.
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Pernica, Josef. "Praktická realizace přípravku demonstrující systém RFID." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-218177.
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This diploma thesis deal with design and realization of demonstration board for RFID system. In the begining is described theory of this system. Next part is about theory of solutions and used components. Next is about practical realization demoboard and control program in C language.
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Mikkelsen, Markus, and Gustav Svanfors. "Mätning av LCD-bildskärmars responstid och latens : Measurement of LCD displays response time and input lag." Thesis, Linnéuniversitetet, Institutionen för fysik och elektroteknik (IFE), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-26555.
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Examensarbetet har utförts i samarbete med företaget LVI (Low Vision International) som tillverkar elektroniska hjälpmedel för synskadade. LVI utvärderar vid jämna mellanrum nya LCD-bildskärmar för deras produkter. LVI behöver metoder samt utrustning för att mäta bildskärmars responstid och latens. Både responstiden och latensen ger fördröjningar vilket t.ex. leder till att bilden blir oskarp, rörliga föremål får en svans efter sig eller att lju- det kommer före bilden. I detta arbete utförs en grundlig förstudie som behandlar bild- skärmars responstid och latens samt ger ett underlag för att konstruera eller köpa mätut- rustning för responstidsmätningar. I förstudien framkommer den standardiserade mätmeto- den ”grey-to-grey” som LVI kan använda för att mäta responstiden. En mätkrets konstrue- ras för att mäta responstiden samt beställs en dedikerad enhet för latensmätning. För att ut- värdera mätmetoderna utförs ett antal tester med mätkretsen för responstid och den dedike- rade enheten för mätning av latens. Mätningarna visar senare att mätmetoden ”grey-to- grey” är den som LVI ska använda men metoden behöver vidareutvecklas. Den dedikerade enheten för latensmätningar visar sig mäta en del av responstiden och bör därför endast an- vändas som komplement till responstidsmätningen vid jämförelser mellan olika bildskär- mar. Arbetet levererar en förstudie i LCD-bildskärmars responstid och latens, en vidareut- vecklad version av ”grey-to-grey”-metoden, mätutrustning för responstidsmätning samt den dedikerade mätenheten för latens till företaget LVI.The thesis was performed in collaboration with the company LVI (Low Vision Interna- tional) that manufactures electronic devices for the visually impaired. LVI evaluates new LCD displays for their products at regular intervals. LVI need methods and equipment for measuring response time and input lag. Both response time and input lag cause delays, which results in such things as image blur, ghosting after moving objects or a delay between sound and image. The preliminary study reveals the standardized method “grey- to-grey” that LVI can use to measure response time. A measurement circuit was constructed to measure response time and a dedicated unit for input lag measurement was ordered. To evaluate the measurement methods a number of tests were conducted with the response time circuit and the dedicated input lag unit. The measurements showed that the method LVI shall use is the "grey-to-grey” method but it needs further development. It turned out that the dedicated unit for input lag measured a portion of the response time and should therefore only be used as a complement to the response time measurement when comparing displays. The thesis delivers a preliminary study in LCD displays response times and input lag, a further developed version of the “grey-to-grey” method, measurement equipment for response time and a dedicated unit for input lag measurements to the company LVI.
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Horváth, Michal. "Zařízení pro monitorování teploty a vlhkosti s bezdrátovým přenosem dat." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2020. http://www.nusl.cz/ntk/nusl-413179.
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The diploma thesis is about designing device which monitors temperature and humidity. In the first part of thesis are explained basic terms, importance of key variables and on market offered products are described. After that the thesis describes device concept design with schematic designs. From designed schematics are described printed circuit board designs. Next part is about device commissioning and correction of errors caused by incorrect design. Last part is about program designing and device testing.
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Nedbal, Jan. "Audio výkonový zesilovač ve třídě D s mikroprocesorovým řízením." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219824.
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The thesis deals with the design and practical realization of class D audio power amplifier with microprocessor controlling. The first part describes the integrated circuits used in a preamplifier and his complete design with a description of the control program for ATmega128 microcontroller. The following part describes an integrated power amplifier TAS5613 and his circuits. The next section describes a switching power supply design using integrated circuit TOP261EN. The last section describes measurements of parameters of individual parts of the amplifier.
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Snopek, Petr. "Přesný funkční generátor." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-217938.
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The aim of the project is to design a concept of function generator with digital synthesis. The device will be controlled using microprocessor which allows synthesizing basic functions (sin, square, raw) as well as arbitrary functions stored in memory. User friendly graphical interface will be controlled by keyboard and rotary switch (IRC). The work emphasizes correct selection of DDS clock source, circuit elements and proper application of signal filtration method with attention to low distortion and low output phase noise.
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Ekberg, Lars Peter. "Development of ultra-precision tools for metrology and lithography of large area photomasks and high definition displays." Doctoral thesis, KTH, Mätteknik och optik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-122264.
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Large area flat displays are nowadays considered being a commodity. After the era of bulky CRT TV technology, LCD and OLED have taken over as the most prevalent technologies for high quality image display devices. An important factor underlying the success of these technologies has been the development of high performance photomask writers in combination with a precise photomask process. Photomask manufacturing can be regarded as an art, highly dependent on qualified and skilled workers in a few companies located in Asia. The manufacturing yield in the photomask process depends to a great extent on several steps of measurements and inspections. Metrology, which is the focus of this thesis, is the science of measurement and is a prerequisite for maintaining high quality in all manufacturing processes. The details and challenges of performing critical measurements over large area photomasks of square meter sizes will be discussed. In particular the development of methods and algorithms related to the metrology system MMS15000, the world standard for large area photomask metrology today, will be presented. The most important quality of a metrology system is repeatability. Achieving good repeatability requires a stable environment, carefully selected materials, sophisticated mechanical solutions, precise optics and capable software. Attributes of the air including humidity, CO2 level, pressure and turbulence are other factors that can impact repeatability and accuracy if not handled properly. Besides the former qualities, there is also the behavior of the photomask itself that needs to be carefully handled in order to achieve a good correspondence to the Cartesian coordinate system. An uncertainty specification below 100 nm (3σ) over an area measured in square meters cannot be fulfilled unless special care is taken to compensate for gravity-induced errors from the photomask itself when it is resting on the metrology tool stage. Calibration is therefore a considerable challenge over these large areas. A novel method for self-calibration will be presented and discussed in the thesis. This is a general method that has proven to be highly robust even in cases when the self-calibration problem is close to being underdetermined. A random sampling method based on massive averaging in the time domain will be presented as the solution for achieving precise spatial measurements of the photomask patterns. This method has been used for detection of the position of chrome or glass edges on the photomask with a repeatability of 1.5 nm (3σ), using a measurement time of 250 ms. The method has also been used for verification of large area measurement repeatability of approximately 10 nm (3σ) when measuring several hundred measurement marks covering an area of 0.8 x 0.8 m2. The measurement of linewidths, referred to in the photomask industry as critical dimension (CD) measurements, is another important task for the MMS15000 system. A threshold-based inverse convolution method will be presented that enhances resolution down to 0.5 µm without requiring a change to the numerical aperture of the system. As already mentioned, metrology is very important for maintaining high quality in a manufacturing environment. In the mask manufacturing industry in particular, the cost of poor quality (CoPQ) is extremely high. Besides the high materials cost, there are also the stringent requirements placed on CD and mask overlay, along with the need for zero defects that make the photomask industry unique. This topic is discussed further, and is shown to be a strong motivation for the development of the ultra-precision metrology built into the MMS15000 system.QC 20130515
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Paulus, Luboš. "Multifunkční volant Formule Student." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219314.
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The Master‘s thesis deals with a creating of display writers on multiple-function steering wheel Formule Student. It is mainly about dates transfered through RS232 or CAN bus from control unit of the Formule to microcontroller. First of all it is necessary to find out, which informations and a which way of displaying them are more useful and readable for drivers. This leads to another point - right choice of display writers, which will be used on the steering wheel. Creation of the design and construction of display device follows.
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Hampl, Tomáš. "Bezdrátový monitoring tlaku pneumatik." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-242145.
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This master‘s thesis describes the design of a system usable for wireless measurement of the tire pressure. The goal is to make a theoretical acquintace with the wireless measurement of a tire pressure. Within the master‘s thesis was suggested device at the block level. For individual blocks have been chosen specific circuits. For the device has been selected the pressure sensor SP100-7AT, the microcontrollers Atmega8 and Atmega16 and the wireless module RFM22. The result of the work is a functional prototype of device including software for microprocessors. Final solution was tested during the experimental measurement.
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Teng, Wen-hua, and 鄧文華. "Digital Signage for Tiled LCD Display." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/55730468409753189862.
Full textAbstract:
碩士國立中央大學
資訊工程學系碩士在職專班
100
The electronic display device used in the digital signage is now constantly developing and progressing. Consumers started to demand for displaying on large screen increasingly, and the required size of signage is usually much larger than the size used in the market recently. Therefore, the need of tiled screen emerges. In this study, we adopt the design of using software and hardware together to produce a system of tiled digital signage. We make a connection to client Android media player on embedded platform, and cut broadcast video to transmit it to fast interpolator on FPGA platform through media content management of cloud-computing digital signage. Each interpolator enlarges the image of the cut video and shows it on independent LCD to complete LCD tiled display. Finally, we accomplished the integration of software and hardware of digital signage. We also found that the display of VGA can reach to 16.2 Frames/sec. In this study, the method and system structure we proposed can decrease the costs of LCD tiled system and enhance the quality of displaying tiled image.
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Yang, Shih-Ming, and 楊士明. "LCD Display Flicker Phenomenon Researching & Solution." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/26350297878365564702.
Full textAbstract:
碩士國立成功大學
電機工程學系專班
92
Flicker is a major visual defect in active-matrix liquid crystal display (AMLCD). As the AMLCD becomes more popular, there have been increased research activities on flicker in order to minimize this undesirable effect. However, most of these studies have focused on individual liquid crystal (LC) mixtures or alignment layers. There were also a few studies on novel pixel structures and driving methods. But up to date there has been no systematic approach to identifying the causes of flicker and establishing a complete flicker model for the AMLCD. The AMLCD depends on active devices to apply voltages to pixels during address time and the ability of pixels to conserve the voltage for the rest of the frame time .To avoid chemical degradation of the LC material, an alternating voltage waveform has to be applied to the LC cell. For this purpose, several modes of polarity inversion including frame, column, row and dot inversion are adopted. Each mode has advantages and disadvantages. Frame inversion commonly used in silicon light valves for the purpose of minimizing the lateral electric field in small pixels. The lateral electric field can result in an undesired reverse tilt domain in each pixel and lead to poor contrast of the display. While frame inversion is good for minimizing the lateral field effect, it also produces a higher degree of flicker than other modes of polarity inversion. In this work, we performed systematic characterizations of flicker in silicon light valves. Four experiments were designed to probe the conduction mechanisms within silicon light valves for causes of flicker. Through systematic characterizations of flicker in various silicon light valves, a flicker model was established. Solutions for minimizing this visual defect were obtained to improve the silicon AMLCD quality.
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Chen, Bao-Shu, and 陳寶樹. "Wide Color Gamut LCD Display Measurement System." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/53388478617967347247.
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碩士逢甲大學
資訊電機工程碩士在職專班
99
The purpose of this study is to design a wide color Gamut LCD monitor measurement system which measures the chromaticity coordinates, color temperature and color cross talk of LCD monitor using the RGB color sensor, the technology of optoelectronic detection and color space transfer matrix. The color space transfer matrix compensates for the LCD and LED display. It is a linear transformation from the RGB color space to CIE1931 XYZ color space. While the test distance of 3 mm from the RGB color sensor to LCD monitor and the accuracy of chromaticity coordinates measurement is better than ± 3%. In this study, the color cross talk of all LCD monitor are good. The advantages of this system are real time, compact, low cost and multi-point measurement by multi-RGB sensor.
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Kung, Weh-Hsia, and 龔文俠. "Design On Driver Circuits for TFT-LCD Display." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/57131403361161220667.
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碩士國立交通大學
電子工程系
90
In this thesis, we focus on the driver circuits for TFT-LCD display. The driver circuits are divided into two parts, gate driver and data driver. Gate driver is composed of shift register, level shifter, and output buffer. Data driver is composed of shift register, level shifter, latch, digital to analog converter, and output buffer. Because the relationship of transparency versus voltage of liquid crystal is nonlinear, we design a digital to analog converter with gamma correction to compensate this effect. The circuit has been designed and fabricated in a 0.5µm CMOS process. In output buffer, we design two kinds of output buffer which can drive high loading. They are folded opamp and slew rate enhancement opamp. In addition, we design two circuits with charge recycling in order to reduce more power consumption. The circuit with half recycling can reduce about 1/2 dynamic power, and the circuits with triple charge recycling can reduce about 2/3 dynamic power. All of four circuits have been designed and fabricated in a 0.25µm CMOS process. Finally, we discuss the concept of using high performance low temperature poly silicon thin film transistor (LTPS-TFT) to directly fabricate the driver circuits on the display panel. The comparison on device characteristics between LTPS-TFT and high-voltage CMOS is investigated. In addition, we proposed two new circuits for pixels with digital memory. In the case of still images, the voltage of pixel electrode is refreshed by digital memory and it can shut down the peripheral driver circuits in the same time. So, it can save more power. The device dimensions and circuit operation of these two new circuits have been designed and verified by Smartspice simulation.
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Hsing-LingLiu and 劉杏玲. "Kansei Evaluation on Slim TFT-LCD TV Display." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/24030271854744684834.
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碩士國立成功大學
工業設計學系碩博士班
98
LCD displays become one of the major industries of Taiwan. Large-size LCD panels will be the trend of the future development of LCD panels, and TV screens will become the main application eventually, CRT TV will be replaced by TFT-LCD completely in the future. LCD displays involve many technologies, including: electronic engineering, optics and material science. Manufacturers declaring their leading edge in the developments of LCD technology usually focus on issues of energy efficiency and the slimness of LCD display. In this study, Kansei Engineering technique will be employed to evaluate the perceptual characteristics of the slimness of TFT-LCD TV display. This study tried to answer the following questions: (1). What visual experiences users gain from slim TFT-LCD TVs. (2). To understand consumers’ Kansei preference toward TFT-LCD TV products. (3) The corresponding relationship between formal features and Kansei adjectives. The investigation includes four stages. 1st to collect TV pictures and adjectives. 2nd to sift diversity from TV pictures and adjectives using KJ, and confirmed 6 final adjectives. 3rd to extract items and categories and conduct the Kansei experiment to build up the relationship between TV pictures and adjectives. 4th to verify and discuss the findings. The results indicate that the relationship between formal features and adjectives by Quantitative Theory Type Ⅰ constructed can be used to formulate the TFT-LCD TV design principles. T test further verifies that there is no significance between the predicted value and Kansei evaluation value. Hence, the formulated principles are quite accurate and feasible. The results of this study are expected to provide designers and marketers with a set of meaningful and reliable guidelines for the development of TFT-LCD TV displays.
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蔡家昌. "LCD Display Image Sticking Phenomenon Researching & Solution." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/m62222.
Full textAbstract:
碩士明新科技大學
電子工程系碩士在職專班
105
Lately these years, liquid crystal displays have been widely applied to many different areas since the associated technologies of TFT LCD (Thin Film Transistor Liquid Crystal Display) were developed and grown rapidly. They also change the ways of set-up of computers, televisions, cell-phones, and pads. Being not compatible with CRT (Cathode Ray Tube) on dynamic responses, TFT-LCD combining the driven IC does well perform like being light, thin, lowly radiative, low power consuming, wide angle viewing, non-geometrically distorted, fully colorful, and well-contrast. TFT-LCD dominantly replaces the traditional CRT and becomes the first priority on the consuming display market. In this thesis, the author is devoted to image sticking and their related investigation. Image sticking should have been one of the main subjects on TFT-LCD. According to the study in the past, few paid attention to the driven waveforms of TFT-LCD Driver IC and the corresponding image sticking. Generally, the time for Burn-in may be as long as 2 hours. In this thesis, the author focuses on the investigation of the ways of solutions of the rear section of the module. There are 4 conclusions out of the results of experiments: （1）Adjust the Vcom among displays to the most optimized conditions, and reduce the level of Flicker as lowly as possible such that the image sticking can apparently improved. （2）Prevent the voltage abnormal writing from over-charging on OE(output enable control). （3）Instead of polar-inversion mode, use dot-inversion by adopting polar interchange to reduce the feed through voltage to as lowly as possible and thus improve the issues of flicker such that the image sticking can be eliminated. （4）To improve image sticking on switching-off conditions, apply a bias lower than 2 volts, simulate the positive power voltage lower than 4 volts, and simulate the negative power voltage lower than -4 volts such that GAS (Gate all select) mode may be started.
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Kao, Hung-Ming, and 高弘明. "Audible Noise Reduction for LCD Module of Mobile Display." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/vzpjn4.
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碩士國立臺北科技大學
電腦與通訊研究所
99
Now in this society, mobile phone is popular using of communication tool. During communication, clear acoustic fidelity is necessary. However, there are many factors to affect acoustic fidelity in mobile phone. One of factor was from LCD display module. LCD display module is very important parts on mobile phone. It can let user know all information through display screen. Due to module structure and assemble issue, LCD panel vibration will be caused by difference driving method. When the frequency of vibration is continually and frequency is during from 20 Hz to 20 KHz, we can call it is an audible noise and it will be heard by human ear. Communication quality will be lower if audible noise is getting more. How to reduce the audible noise will be discussed in this thesis. This thesis is discussing about the relationship between panel noise and LCD driver IC. I measured and compared test data by using difference driving method. Base on those data, a better driving method is proposed. All test are used FPGA evolution board or MCU controller board to write test program, or adopt external hardware circuit for testing, and then measure all data in anechoic room in three party.
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Chung, Ting-Wei, and 鍾定韋. "TFT-LCD Display Array Photolithography Process Mura Defect Improvement." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/3u5f35.
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碩士中原大學
電子工程研究所
106
This paper explores TFT-LCD Display Array (Array) Yellow light due to the differences in the design of equipment and products caused by the difference in the brightness of the yellow light process in the uneven mark (Mura) an exception to the. Research is a combination of six standard deviations (Six Sigma) Project Management-DMAIC improved optical resistance coating process for Mura, the first analysis in the design of experimental methods will affect the key factors in the process, and then use the test method to adjust the best process components, and product validation, and ultimately with the best parameters to enhance the process capability and product stability, to reduce product adverse rate of purpose. The results of the experiment showed that the pressure was on 300Pa, to produce stable conditions, drastically reduce Pin Mura generated. Up to the improved Pin Mura yield loss target 0.514%, actual output loss from 1.34% down to 0.18%, through the daily inspection, machine maintenance confirmation and replacement of abnormal parts, can maintain set a good rate target and achieve capacity stability, save company costs, improve customer satisfaction.
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Yu, Hsiu-Ling, and 余秀玲. "Intelligent overdriver compensator design for a TFT LCD display." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/98610969876677568519.
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碩士中華大學
電機工程學系碩士班
98
When motion pictures are displayed on liquid crystal displays (LCDs)， some phenomenon such as image draggle， blur， color shift， or poor motion contrast may occur in image frames due to the slow response of LCDs. For the foregoing disadvantages， a design method of LCDs using overdrive fuzzy controllers is provided in this thesis. The fuzzy control rules required by the speech function design in diary life. The proposed fuzzy control can improve the slow responses of LCDs. accordingly improved. Especially， when gray levels change relative to gray levels， the response time of LCDs is set to be shorter than a frame period， such that the poor phenomenon occurring in image frames can be improved. Finally， the provided overdrive fuzzy controller is tested and verified in simulation. Based on the simulation result， the response of LCDs is effectively reduced in the LCDs which have adopted the provided overdrive fuzzy controller.
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CHIANG, CHIH-HSIANG, and 江志祥. "The Study of Improving LCD Display Automatically Adjusted Flicker Phenomenon." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/92823615560738688989.
Full textAbstract:
碩士逢甲大學
資訊電機工程碩士在職專班
100
As TFT LCDs get more and more popular in the market, reduced rejection rate become a major thrust in the industry. Image flicker is one of the main issues. In view of the image flicker issue improvement, the industry provided many related research to improve it, For example, LCD aspect, alignment layers, structure of pixel, driving method, and so on. Many methods were used to improve image flicker; however, there is yet an active system successfully overcome the issue. This thesis studies and discusses the issue of LCD display flicker. To further improve image flicker issue by adjusting internal Vcom voltage of the LCD driver IC. In addition, over using Manpower and time is considered since each LCD panel must be checked by human eyes before burning production process. The studies have probed the automatic optical inspection system (AOI) to replace human eyes to check each LCD panel. AOI system will improve the detecting precision; and further, it will also reduce the labor cost and keep the quality of products. The purpose of this thesis studies is to develop a user-friendly operating interface and reduce cost. LCD Flicker automatic optical inspection system (AOI) detects the range of Image flicker and adjust voltage setting of LCD Common, it will look for the voltage setting of LCD Common when LCD flickers slightly. At the same time, the value will burn into OTP memory of LCD by AOI system. The setting is the default value of LCD panel could make the phenomenon of image flicker of LCD to minimum. As the experimental part of this thesis studies, two ways of optimization were compared. Comparing optimization checked by human eyes, and the optimization of LCD Flicker checked by AOI. Which way better inspected image flicker? It will be discussed more in the thesis. Thus, it interests me to study this subject, and also I would like to present some my personal idea to the people who is interested in the same project reference.
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Tsung-YiChen and 陳宗益. "A Study on the Power Management for LCD Display System." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/29332866680742669930.
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碩士國立成功大學
電機工程學系專班
100
This study was based on the ENERGY STAR Program Requirements for Displays (Version 5.0). The content of the thesis analyzed the power control as well as energy saving under LCD display system. The power consumption under power saving mode is necessary, and shortage is not acceptable. As the sizes of the LCD getting bigger, the power consumption when turn on is increasing. If the power is not well control when turn on and under power saving mode, power would be waste. Use the micro control unit (MCU) to manage power options, together with the power supply with standby power circuit configuration and power factor correction (PFC). The system detects the horizontal and vertical sync signal from the video to serve as basis for turn on the system as well as shifting between turn on and power saving mode. Under power saving mode, MCU automatically turn on other functions and power, and save only the turn on function, thus decreasing the power consumption. Finally, by testing a 55” LCD display system (500W) prototype, the power consumption is less than 1Watt under the power saving mode, and power factor is 0.99 at full load (500W). The actual experimental result is used to support the LCD design theory.
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Hung, Chia-lung, and 洪嘉隆. "The study of Photo-Spacer application to STN-LCD Display." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/a644np.
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碩士國立中山大學
光電工程研究所
96
Currently , the STN-LCD with twist angle of 240 degree is the most popular operation mode . In this thesis , we utilize Photo-Sensitive spacer of TFT-LCD to substitute for the traditional spacer , and apply them in the above mentioned STN-LCD . The traditional spacer were used N2 air to spray on glass substrate by SUS tube . It make light leakage , decrease the transmittance , contrast ratio and aggregate spacer easily . When we pressure on glass and the phenomenon of migration has been found accordingly . It will influence quality of LCD . So we utilize Photo-Sensitive spacer to substitute for the traditional spacer in order to improve the defect . In this thesis , we fabricate different kind Photo-Sensitive spacer of size , shape and area ratio (Photo-Resist (NPS) from Everlight Chemical Industrial Corp) . We utilize Photo Lithography process to form the spacer thickness on insulation layer , and find the best type . In this experiment , the different characteristic of material between traditional spacer and Photo-Spacer were compared . And we utilize different process condition (pressure) and material(LC Δnd) to discuss the relation . Finally , we proof the advantage of Photo-Spacer apply in STN-LCD .
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Liao, Yan-po, and 廖彥博. "Infrared Controller Design Base on LCD Display and TTS Chips." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/56746349773716206117.
Full textAbstract:
碩士國立臺灣科技大學
電子工程系
96
Text To Speech means to transfer any kind of languages or messages input into influent, articulable and native speech output. The technology of applying TTS is getting more sophisticated in market for now such as Chinese Speaking Machine, Human oral presentation system, Internet audio-introduction, Language teaching software are the typical example. It would make electronic products more friendly if it can connect TTS to use within our life. Also it can improve the convenience in using electronic products when the old people use it. The purpose of researching is to integrate 16-bits RISC MCU S1C17701 and TTS chip S1V30120, both made by Seiko EPSON, with infrared ray equipment that control white goods in addition to inform user the interface status. In the researching, We use different function chips and hardware's develop software platform, OrCAD Capture CIS、PowerPCB, Seiko EPSON GNU17 IDE eclipse integrated development compile platform to complete the system.
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Wang, Bo-Siang, and 王柏翔. "Embedded System Design for Eye Detection and LCD-Display Power Saving." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/41042435418506909308.
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碩士國立雲林科技大學
電子與光電工程研究所碩士班
100
Due to the advance of CMOS processing technology, the embedded camera becomes the essential device for many ICT (Information & Communication Technology) products. People usually use it to capture and convey image or video. LCD display is also an importance device in ICT product, which can show all messages. However the LCD display has huge energy consumption such that the engineers focus on lots of power saving techniques for promoting the added value of ICT products. This thesis is to develop a real-time power saving approach, which includes the eye detection and PWM control. In the beginning, the system inputs the image by camera. We propose an efficient algorithm for eye detection based on eye texture extraction, major color and block matching methods. The proposed detection approach possesses lower computing complexity and memory requirement such that it is suitable for implementation in the general embedded platform. If the embedded system does not detect the user’s eye, then it asks for the PWM circuit to turn off the backline LED in LCD panel to achieve the power saving. From the experimental results, our proposed eye detection has 93% of accuracy based on CVL face database. We promote 3% detection rate when comparing with the existing methods. After implementing in Davinci embedded platform, the performance of system can achieve 21 frames per second for the video with frame size 640 480. It can improve the energy efficiency of 59% on ATM, IBON and personal computer.
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Su, Yi-Chun, and 蘇依駿. "The Research of Alignment Film Thickness Affects TFT-LCD Display Quality." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/62m4vx.
Full textAbstract:
碩士元智大學
化學工程與材料科學學系
105
In the present study, the main factors affecting the thickness of the alignment film are discussed. The first one is the alignment liquid solid content. The higher the concentration is, the thicker the alignment film is, but the viscosity affects the printing quality. Main-cure oven time and temperature changes, preheating oven heating degree varies, PI liquid solvent evaporation rate is different, easy to cause uneven film thickness, hard oven is the cavity (Chamber), the temperature must be uniform , The third is A round Mesh number of changes, the thickness does have a considerable change in the quality of the display also has a relative impact. Mainly by lighting test showed uniformity and optical image observation and analysis, optical properties confirmed that the improvement of the thickness of the film to the uniformity of the display, the panel production quality in line with market demand for high image quality, high contrast technology.
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Chu, Chi-Lang, and 朱啟郎. "The factor for inspecting the defect of the TFT-LCD Display." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/89054691047781394963.
Full textAbstract:
碩士國立中興大學
機械工程學系所
96
The traditional CRT Monitor is large and it will harm human body because of radiation. By comparison with the traditional CRT screen, the TFT-LCD screen is economical electricity, light-thickness, low-level radiation and doesn’t occupy volume so the TFT-LCD screen will substitute for the CRT screen. TFT-LCD screen has overcome the low response time and high cost with the improvement of the Science and Technology. So the TFT-LCD Display will be the key point of the Flat Panel Display in the future. Better performance product and perfect quality will be the main target for the TFT-LCD manufacturer. The defects of TFT-LCD contain point defect, line defect, the outward-appearance defect and Mura. Mura is the most difficult to be solved and inspected. There are two kinds of inspection which are human-inspection and auto optical inspection. The auto optical inspection is not so good to screen out Mura. How to use human-inspection more effectively will be the first priority. The thesis will research the factor of the human-inspection that will influence your judgment. By the experiment, the root cause will be found out and the yield will be improved in the factory.
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Huang, Cheng-Kun, and 黃承焜. "The study one the development of patent technology in LCD display subsystems." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/29530368086521512912.
Full textAbstract:
碩士國立交通大學
工業工程與管理學系
85
Patent analysis is an important tool for the development of new technology in enterprises and research-associated organizations. The purpose of this research is to help the R& Ds to find out the trend of new technology and then to develop the valuable technology in LCD display subsystems by using the information of the Patent Map. At first, the knowledge of the R&Ds and USA patents are employed to construct the Patent Technology Map and Patent Management Map. The technology development analysis is then applied to get the developmentstatus of technology in various countries and firms. The technology trend analysis reveals the evolution of the new technology. Finally, with the information of various Patent Maps and the judgment of R&Ds, the claim analysis of major patents is accomplished to obtain further knowledge of the target technology. The interface driving technology and the handling technology of display effect in LCD display subsystems are identified subjects to explore. It is found that USA and Japan lead in the interface driving technology and VLSI Tec. has developed the most superior data-conversion technology in this field. The development of interface driving technology is currently in its introduction period of the technology life cycle. This research also demonstrates that firms in Taiwan are capable of investing in the related dvelopment of technology for LCD display subsystems.
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Tseng, Tai-Hsiang, and 曾泰祥. "Assessing the visual comfort range of a large-size stereoscopic LCD display." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/28619671699114708116.
Full textAbstract:
碩士國立臺灣科技大學
應用科技研究所
100
Display technologies improve greatly in recent years. Large size 3D TVs are now bringing 3D immersive experience from cinemas to our living room. However, many customers still worry about 3D visual discomfort issue. Methods for improving visual comfort of large format 3D TVs therefore are worth studying. The aim of the study is to investigate visual comfort range of a large-size 3D LCD display for depth- image-based algorithms to scale parallax angles into the range. The study tried to answer six questions including： What is the visual comfort range? What is the fusion limit? Is the comfort range depended on the parallax of background or foreground? Can the comfort range be extended by background burring? Is the comfort range for small interpapillary-distance observers is different from normal observers? Is the comfort range is image dependent? A series of psycho-visual experiments were conducted to answer those questions. The results show that： (1) For a toed-in 3D image, the visual comfort range is about 1.5o visual disparity angles from a background to a foreground object. (2) The fusion limit is about 0.8 o visual disparity angles. (3) The comfort ranges for different background or foreground parallax is similar. (4) Background blurring would extend the comfort range. (5) The comfort range of small interpapillary-distance observers is smaller than normal observers. (6) The comfort range is image dependent for toed-in 3D images but independent for parallel 3D images. The study evaluated 3D visual comfort for only one viewing distance. More viewing conditions should be tested for deriving a versatile model to improve 3D visual comfort of large-size 3D LCD displays.
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Wang, Wan-Wei, and 王萬煒. "The influence of Light source to the inspection of LCD Display Panel." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/4etu7y.
Full textAbstract:
碩士國立臺北科技大學
光電與平面顯示器產業研發碩士專班
95
「Well prepare the tools prior to finish your job」 The critical component to the inspection of LCD Display Panel is the optical light source. An optimum wavelength of the light source, from the CCD or human eye point of view, can improve the astheropia and even result in the upgrade of inspection power. The incandescent light is fit for human eye, however, the yellowish green light is better for the identification of blemish and flaw. This study is based on the spectrum that measured via Monochromator and Optical Microscopic.We try to pursue the most optimum light source through the application of statistical analysis of regression equations.
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Chang, Sung-Jung, and 張頌榮. "Automatic dot and line defects inspection system for TFT-LCD display panels." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/13008319396538962745.
Full textAbstract:
碩士國立成功大學
製造工程研究所碩博士班
93
Nowadays, the majority TFT-LCD manufactories still depend on human eyes to inspect the defects in final test. The inspection standard may be changed by different inspectors or their mental conditions. Hence, it becomes a big problem because the future size of panels is going to be large and high resolution. In this study, an automatic inspection system was developed to inspect dot and line defects. This system was composed of image processing, mask technology, image segmentation, image analysis and a XY table. In the case of final result, this study utilized Morphology process to extract defect features and to find out their location through automatic analysis, and then adopted Area Differentiate to determine the size of defects. Finally, the obtained defects would be contrasted with original pictures by Gray-level compare to achieve high speed inspection and automatic recognition. Hence, this system is suitable for quality testing on LCM products.
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Hsu, Ming-Hung, and 徐銘鴻. "A Study of Reliability Prediction and Evaluation of TFT- LCD Display Products." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/63890185453384816042.
Full textAbstract:
碩士國立成功大學
工學院工程管理專班
96
Recently, the Taiwan Government has formulated the big national projects called “Two Trillion/ Twin star Industries Development Plan” which includes Semiconductor and Flat-panel industries that estimates to share the most national investment in next few years. Taiwan now proclaimed to be the second most important export country in the world. As the TFT-LCD display has the advantages of slightness, thinness, power-saving ability and low radiation to environment, it has a great potential to replace the CRT display in the future market. Due to the technology development, a gradual strong demand for flat display products like TFT-LCD has increased year by year. Those products include desktop PC monitor and LCD TV. Therefore, it is important to enable consumers to get better quality of products and improve the competitiveness of products of TFT-LCD by promoting the product reliability, especially their electronic products using the Sequential Test in evaluating the reliability to validate if the failure rate can meet the lifespan of products and demand by customers and also the standard quality of product set in the beginning of the design plan. This thesis, first collects the parameters of electronic product elements and then evaluate their failure rates with the analysis of software Relex according to MIL-HDBK-217F and American Business standard - Bellcore method. The electronic component collection employs the Bellcore method to analyze the fail rates, and these data are compared with the results from the Sequential Test to check whether the expected MTBF data is met. The criteria for product life are also create to reach the optimal reliability level. Finally, the various reliability test methods such as high/low temperature storage/operation, thermal shock, vibration, and drop tests, etc are also conducted. These are the exercises to further investigate the product reliability. The system engineers can provide the product life on the design and manufacture step to obtain the life time, which is helpful for the LCD products to conduct the reliability prediction and testing in the future.
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LIEN, REVER, and 連進興. "A Feasibility Study on Applying LCD Display for the Back Mirror Motorcycle." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/77645522741953552188.
Full textAbstract:
碩士華梵大學
工業設計系碩士班
93
Motorcycles are convenient, rapid, and easy-parking vehicles. They can be used for recreation and transportation purposes. Nowadays, they are becoming more and more indispensable to the majority of people who live in the metropolis, especially to commuting workers, students, and deliverers. Among motorcycle accidents, slight impacts and collisions are frequent when riders make a left turn at the quick lane or improper right turns, especially for teenager riders. Although they can be assisted by rearview mirrors when riding, most of the time they ignore them. Sometimes because the mirrors are broken, loose, shaded, or in wrong directions, they are unable to see clear reflections. Besides, high density of the population in Taiwan can be accounted for the traffic chaos. When competing for space on a narrow road with automobile drivers, motorcyclists are at disadvantages and are likely in danger. So far, no really effective measures of precaution have come out to reduce accidents. The two-wheel design disables the frame of the motorcycle to keep balance. Rearview mirrors located on both sides require riders to turn their heads in order to watch out what is behind them. This often causes a sore neck. If we can find a technology that integrates the functions of visual technology and an LCD display, to reflect the images through a digital camera, then motoring accidents can be prevented and riders’ sore necks can be greatly relieved as well. It could be a good opportunity to combine both computer and photographic technologies, creating a more user-friendly interface that keeps the merits of traditional mirrors and gets rid of their flaws, and remodeling into a brand new product. Such idea provides motorcycle makers and design engineers a direction to think about the feasibility of developing and commercializing such new-concept products.
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wei, wang chang, and 王昌偉. "Optical Design and Simulation for the Back Light Module of LCD Display." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/32564436439915799859.
Full textAbstract:
碩士大葉大學
電機工程學系碩士班
93
This research utilizes optics simulation software to simulate light source and back light module, including: V-grooves(V-cut), micro-structure array of the model, Brightness Enhancement Film (BEF). The main research topics are divided as following: First, the light source simulation of LED is constructed in accordance with real LED luminous intensity data and Polar Candela Distribution plot. Second, the optical simulation and optimization for v-groove structure which is applied to the edge of the edge of the light guide panel. In order to increase the divergent angle of light source and have more uniform light distribution, we present a method of v-groove structure applied to the edge of light guide panel to improve both properties of light sources. Third, by using the software tool, we investigate the dot pattern in the back side of light guide panel. With the hemi-sphere structures, several parameters such as depth, period, size are studied in order to find the find the best conditions which give the highest brightness and best uniformity of the back light module. Fourth, Brightness Enhancement Film(BEF) can lead the light in the big angle range to the vertical direction, thus the central light intensity increase effectively. We use the real 3M BEF products as a model to examine its function by optical simulation. Finally, the bright spot problem of back light module and the great angle light source phenomenon are studied and some skills are found to overcome these drawbacks.