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Radiokomunikační monitor pro ISM pásmo 868 MHz / Radiocommunication Monitor for ISM Band at 868 MHzFrecer, Petr January 2012 (has links)
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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Modernizace klimatizační komory / Upgrade Thermal ChamberPagáč, Radek January 2009 (has links)
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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Caractérisation objective et modélisation psychovisuelle du flou de mouvement sur les écrans à cristaux liquides - Impact sur la qualité perçueTourancheau, Sylvain 03 December 2009 (has links) (PDF)
La « haute-définition » a connu un essor important ces dernières années dans les domaines multimédia (télévision, jeux vidéo, etc.). Cependant, pour que l'observateur bénéficie pleinement de cette amélioration de la qualité d'usage, l'augmentation de la résolution spatiale des images affichées doit être accompagnée d'une augmentation de la taille de l'écran. Les écrans à tube cathodique (CRT), lourds et encombrants, ont donc progressivement laissé la place à de nouvelles technologies d'affichage, caractérisées par leur écran plat. Les écrans à cristaux liquides (LCD), leaders sur le marché des téléviseurs et des moniteurs informatiques, souffrent encore de nombreux défauts visuels notamment lors de l'affichage d'images animées. Durant ces travaux de thèse, nous avons choisi de nous intéresser plus particulièrement au flou de mouvement, dont les causes sont à la fois technologiques et perceptives. Nous avons tout d'abord caractérisé cet artefact visuel d'un point de vue métrologique, en développant une méthode de mesure basée sur la réponse indicielle temporelle des pixels de l'écran. Dans un second temps, nous avons mis en œuvre plusieurs expérimentations psychophysiques de manière à modéliser la perception du flou de mouvement sur LCD, et à caractériser la gêne associée à ce défaut. Ces mesures psychovisuelles ont permis d'établir des recommandations sur les caractéristiques temporelles des écrans LCD. Enfin, un modèle de flou de mouvement global, basé sur la caractérisation technique et perceptive de cet artefact, permet de prédire la perte de qualité mesurée subjectivement sur les écrans LCD. Les solutions technologiques de réduction du flou de mouvement peuvent alors être évaluées de manière automatique.
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EtherLux, a low power wireless displayHocker, Andrew Edward 17 September 2010 (has links)
Real time information is essential in many businesses and as a method to inform employees and consumers, so that they can make informed decisions. In offices, warehouse and stores it can be advantageous to have tens to hundreds of smaller displays to deliver a variety of information. This paper details the design, implementation and testing of a wireless low power solar powered display system as a solution to deliver real time information. The system uses an Organic LCD to maintain an image for years on no power and uses very little power to update and refresh the display. The system uses off- the-shelf components to achieve multiple updates per day and, with the right lighting conditions, can perform up to one refresh per minute. The system is entirely powered by incandescent light, has a built in radio, and utilizes capacitors to store charge and deliver power, removing the need for rechargeable batteries. The wireless signal works at 2.4GHz and uses the low power 802.15.4 protocol to send and receive data at a range of 75 feet. It has no observable issue operating in environments with 2.4GHz wireless signals, such as 802.11g. The whole system can be built for under $75.00, and takes up an area of 6" x 8" including the photovoltaic cells. / text
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Soft proofing using liquid crystal displaysLeckner, Sara January 2004 (has links)
<p>Development of colour management systems, the level ofstandardisation, as well as the embedding of facilities forcolour management into computer operating systems and software,enables successful future interoperability of colour reproductionin the graphic arts industry. Yet colour reproduction from onemedium to another, still gives rise to inconsistencies.</p><p>This thesis investigates colour management and controlprocesses in premedia and press process workflows in graphic artsproduction, including standards, instruments and procedures. Thegoal is to find methods for higher efficiency and control ofcolour print media production processes, aiming at increasingcolour consistency and process automation and of reducingoverheads. The focus is on the control of colour data by displaysin prepress processes producing low quality paper products. Inthis respect the greatest interest of this thesis is on technicaland visual characteristics of displays with respect tp thereproduction of colour, especially desktop Thin Film TransistorLiquid Crystal Displays (TFTLCD) compared to portable TFTLCDs andCathod Ray Tube (CRT) monitors.</p><p>In order to reach the desired goal, this thesis is based on aliterature survey and empirical studies. The empirical studiesinclude both qualitative and quantitative methods, organised intothree parts:</p><p> Colour process management: Analysed case studies of theimplementation of colour management in entire graphic artsproduction workflow processes.</p><p> Display technology: LCD and CRT displays have been examinedthrough measurements to establish their fundamental strengthsand weaknesses in reproducing colours.</p><p> Comparison of reproduction: A perceptual experiment hasbeen conducted to determine the ability of the disparatecomponents included in a colour management system to co-operateand match reproduced colour, according to the perceivedpreference of observers.</p><p>It was found that in most cases consistent colour fidelitydepends on the knowledge and experience of the actors involved inthe production process, including the utilisation of routines andequipment. Lack of these factors is not necessarily fatal for thefinal low quality paper colour product, but obstructs theautomation. In addition, increased digitalisation will increasethe importance of displays in such processes. The results showthat CRTs and desktop LCDs meet most of the demands of colourreproduction in various areas of low quality paper productionprocesses, e.g. newspaper production. However, some fundamentalaspects, such as low digital input values, viewing angles andcolour temperature, matters that concern characterisation andcalibration, still need to be developed. Concerning softproofing, the matching correspondence between hard and softcopies gives similar results for both CRT and LCDs forhigh-quality paper originals, if the luminance is decreased onthe LCD (to luminance levels of CRTs). Soft proofing of lowquality papers gives equally lower matching agreement for bothCRT and LCD, in this case when the luminance of the LCD is sethigher (e.g. about twice the levels luminance levels ofCRTs).</p><p><b>Keywords:</b>Displays, LCD, CRT, premedia, prepress, softproof, workflows, newspaper, colour management systems, colourcontrol, colour reproduction</p>
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以淨現值法分析BenQ LCD TV 進入新市場的經營風險與機會 - 以土耳其市場為例 / The Risk and opportunity of BenQ LCD TV business to enter new market by NPV analysis- A case study of Turkish market董于震 Unknown Date (has links)
根據DisplaySearch最新報告統計,2009年全球電視市場出貨成長2%,達到2.11億台,而液晶電視在2009年的出貨成長率高達37%,更勝於2008年的34%。2009年電視市場表現最佳的第四季,在第四季中,全球電視市場出貨相對於2008年第四季成長17%,而LCD TV出貨更較前一年同期大幅增加50%,而為2007年以來最佳的單季成長率。
對於台灣廠商而言,掌握LCD TV的關鍵零組件如面板,卻無法提昇LCD TV產品的品牌知名度及全球的銷售數量,大部分廠商依然停留在賺取零組件的製造費用或微薄的代工利潤,反觀韓國,不但壟斷零組件市場,更在LCD TV品牌全球市場攻城掠地。本研究以BenQ這家品牌公司為例,在擁有同集團友達的面板供應下,以LCD TV產品進入土耳其市場所應採取的進入策略、時間及行銷佈局的分析,最後以淨現值觀點來做決策的評估。
本研究發現,在使用舉債來進行此項投資的狀況下,計畫三年期(2011~2013年)的淨現值為680,416美元,是一項值得進行投資的計畫;若使用內部資金進行此投資計畫,資金成本為7.37%,則計畫之淨現值為597,452美元。若市場進入策略為高價策略,計畫三年期的淨現值為737,688美元;若市場進入策略為低價策略,計畫三年期的淨現值為601,548美元。若處於悲觀市佔率下,計畫的淨現值為424,506美元;若在樂觀市佔率下,計畫的淨現值為930,584美元。
經過情境分析後,本研究也發現,若將訂價調整為與韓系大廠一樣的高價策略同時使用舉債來進行此項投資,則進行此計畫所得的淨現值最高,為737,688美元;相對地,若產品的價格設定是和當地廠商相同的低價策略,且使用內部資金進行此項投資計畫時,則進行此計畫所得的淨現值最低,為528,129美元。此外;若在悲觀市佔率的情形下,同時使用內部資金來進行此項投資,則進行此計畫所得的淨現值最低,為373,199美元;相對地,若在樂觀市佔率的情形下,同時使用舉債來進行此項投資,則進行此計畫所得的淨現值最高,為930,584美元。
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Liten displaymodulJonsson, Michael January 2006 (has links)
<p>The purpose of this Master Thesis is to analyze what suitable hardware platforms there are on the market in order to build a low price control and information system for mobile applications, called small display module. The thesis will be underlying material for making a decision for further development. The result of the thesis consists mainly of a Windows CE kernel and a schematic for a CPU card, on which it would be suitable to build the display module. Another major part of the report is the introduction of different techniques that could be of interest when designing a processor based system. The processor architecture that was chosen is the x86. This is mainly due to CPU availability, but as well as the fact that existing software can be used on the display module without any significant modifications. Many interesting processors were sorted out because they hade a very high price on the development kits from the manufacturer and because the possible production volume can not manage this cost. The development kit makes the development easier and can be used for performance tests before prototypes are built.</p>
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The comparision of Taiwan and Korean panel companies, taking Auo and Samsung as studying cases.Li, Chiu-man 09 September 2007 (has links)
Under the government development policy, the pulling power of domestic market, and the technology support from Japan, Taiwan has surpass Korean, became the largest Large scale TFT LCD supplying country. The rising status of Taiwan has attracted a lot of international critical component supplier to establish branch in Taiwan, including Corning, Merk, Asahi, NEG, NH Techono Glass Corporation, Nitto optical, HOYA. Taiwan need to increase the self-supplying rate of equipment and control and manage the technology patent to be more competitive.
Under the specific long-tern developing policy, Korea government creates a very suitable environment for industry-government-research cooperation. With unique conglomerate developing method, Korea LCD company has producing economic sales, well-known brand name, and vertical integration of key components, which made Korea replaced Japan to be the largest LCD panel supplying country since 1997. Korean¡¦s company keep on upgrade themselves by investing in R&D, under government¡¦s supporting policy, the country is expected to reach 80% self-supplying rate in related material, components and producing equipment, which totally makes Korea more competitive in panel industry.
In order to understand the development model of Taiwan and Korean¡¦s company, this research take Taiwan AOU and Korean Samsung as study case to compare how different background and innovative ways influence company¡¦s business performance.
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Alphanumeric LCD infrared control via computer’s parallel portJaramillo Cantu, Hector January 2006 (has links)
The present work will explain a method to achieve a remote controlled (via IR LED) alphanumeric Liquid Crystal Display. In modern times, the remote access of different devices has become quite popular, therefore, the aim of this project is to provide a useful tool that will integrate common and easy to access devices. The system includes a C language based user interface, an assembly language code for the AT89C51ED2 microcontroller instructions and some digital electronic circuits needed for the driving and control of both the LCD and the infrared communication, as well as the PC with a parallel port. The interaction of all the devices provides a whole system that can be helpful in different applications, or it can be separated into each one of its different stages to take the best advantage as possible.
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Ink-Jet Printing of Color Optical Filters for LCD ApplicationsCompagnon, Maxime January 2006 (has links)
At the age of multi-media, portable electronic devices such as mobile phones, personal digital assistant and handheld gaming systems have increased the demand for high performance displays with low cost production. Inkjet printing color optical filters (COF) for LCD applications seem to be an interesting alternative to decrease the production costs. The advantage of inkjet printing technology is to be fast, accurate, easy to run and cheaper than other technologies. In this master thesis work, we used various disciplines such as optical microscopy, rheology, inkjet printing, profilometering and colorimetry. The specific aim of the thesis was to investigate the feasibility of using company-A pigment formulation in inkjet production of COF for active matrix LCD applications. Ideal viscosity parameters were determined from 10 to 20mPa·s for easy inkjet printing at room temperature. The red pigments used are fully dispersed into the solvent and present an excellent homogenous repartition after printing. Thickness investigations revealed that the printed COF were equal or slightly thicker than typically manufactured ones. The colorimetry investigations demonstrated color coordinates very close to the NTSC red standard. LED backlighting seems to be a valuable solution to combine with the printed COF regarding to the spectrum and color analysis. The results on this thesis will increase the understanding of inkjet printing company-A pigments to produce COF for LCD applications.
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