This thesis deals with design of numeric keyboard, which can be connected to personal computer or laptop through USB interface. This numeric keyboard can be also configured using application for operating system Windows. Backlight pattern generator is also part of this application. Theoretic part deals with various types of keyboards, switches and closer description of USB interface. Practical part deals with sole design of circuit that detects keystrokes and sends information about active switches through USB, description of used components, description of microcontroller service routine and description of the application for backlight pattern generating. At the end of this thesis are described results of measurements which were made to choose mechanical switches with shortest debounce time and keyboard response to key press.

<p>The glazing is today a part of the car design. The customer is more or less taking for granted that his or her view from inside the car is a direct mirror of the outside world. With more complex shapes, lower installation angles and thinner glass it is a great challenge to produce even better quality at a lower price. While the windscreen is regulated by law, the lack of well specified requirements for the optics in the backlight (rear window), together with the absence of direct customer complaints, is causing the optical quality of the backlight to decrease. The requirements and measuring methods used today are described in technical terms and do not correspond to the human perception of optical distortion.</p><p>This report is a first step towards new technical requirements, for the optics of backlights, based on the driver’s perception of optical distortion. The knowledge of how optical transmission distortion occurs, how it should be measured and how it affects the driver, is essential in order to control it.</p><p>Several databases were searched and contacts with experts were established, in order to gain knowledge. The connection between the technical requirements and the human perception of optical distortion in backlights was investigated by using psychophysical methods. A within factorial design was employed with two independent variables; viewing distance from backlight to tailing object and fixation time (viewing time). The result showed a significant difference in perception of optical distortion between 25 and 75 metres. Moreover, optical distortion is, according to the test, more disturbing during free fixation time than for fixation times of about one second.</p><p>The requirements often used for backlights today (12 ± 5 millimetres) allow distortions that 68 percent of the test subjects perceived as disturbing. In order to please the test driver from Volvo the requirements need to be as high as 12 ± 2 millimetres, which correspond to the 96th percentile. Furthermore, the result confirms that dynamic measurements are needed to find a connection to human perception of optical distortion. The principles of a new measuring method that measures the deformation and the dynamic distortion were developed to show the possibilities of measuring what the driver perceives.</p><p>Even if a good measuring method can help controlling the produced glazing it is not enough to optimize the quality of the production. More important is the choice of thickness and curvature of the glass, the installation angle and the manufacturing method. It is important to set about the origin of the problem and develop a good routine of how to work with optical distortions. Optical distortions in backlights, similar to the tested backlight, have a low probability to disturb the driver in such extent that it has an effect on the driving. Nevertheless, it is a source of irritation and discomfort, which do not belong in a premium car.</p> / The video files are also clickable from the pdf file pages 29 and 56.

The glazing is today a part of the car design. The customer is more or less taking for granted that his or her view from inside the car is a direct mirror of the outside world. With more complex shapes, lower installation angles and thinner glass it is a great challenge to produce even better quality at a lower price. While the windscreen is regulated by law, the lack of well specified requirements for the optics in the backlight (rear window), together with the absence of direct customer complaints, is causing the optical quality of the backlight to decrease. The requirements and measuring methods used today are described in technical terms and do not correspond to the human perception of optical distortion. This report is a first step towards new technical requirements, for the optics of backlights, based on the driver’s perception of optical distortion. The knowledge of how optical transmission distortion occurs, how it should be measured and how it affects the driver, is essential in order to control it. Several databases were searched and contacts with experts were established, in order to gain knowledge. The connection between the technical requirements and the human perception of optical distortion in backlights was investigated by using psychophysical methods. A within factorial design was employed with two independent variables; viewing distance from backlight to tailing object and fixation time (viewing time). The result showed a significant difference in perception of optical distortion between 25 and 75 metres. Moreover, optical distortion is, according to the test, more disturbing during free fixation time than for fixation times of about one second. The requirements often used for backlights today (12 ± 5 millimetres) allow distortions that 68 percent of the test subjects perceived as disturbing. In order to please the test driver from Volvo the requirements need to be as high as 12 ± 2 millimetres, which correspond to the 96th percentile. Furthermore, the result confirms that dynamic measurements are needed to find a connection to human perception of optical distortion. The principles of a new measuring method that measures the deformation and the dynamic distortion were developed to show the possibilities of measuring what the driver perceives. Even if a good measuring method can help controlling the produced glazing it is not enough to optimize the quality of the production. More important is the choice of thickness and curvature of the glass, the installation angle and the manufacturing method. It is important to set about the origin of the problem and develop a good routine of how to work with optical distortions. Optical distortions in backlights, similar to the tested backlight, have a low probability to disturb the driver in such extent that it has an effect on the driving. Nevertheless, it is a source of irritation and discomfort, which do not belong in a premium car. / The video files are also clickable from the pdf file pages 29 and 56.

Liquid crystal display (LCD) has been widely used as an important human interface with typical portable devices such as notebook-type computers, digital camera and cell phones, etc. The LCD panel does not emit light spontaneously, and thus it needs a surface backlight source. The function of light guide plate (LGP) was to guide light from a light source and radiates it homogeneously from all over its output surface. In this thesis, the research object was focused on this optical component. This thesis mainly concludes two major parts. The first part focused on the design of cold fluorescent lamp (CCFL) light source LGP. If the bottom structure of the LGP in a backlight module was made up of V-Cut micro-structures, then conventionally, the shape and spacing between any two adjacent columns of micro-structure should be designed specifically in order to obtain a more uniform illuminance distribution. It was required to apply complicated mathematics and cost a lot of time to design. In this study, a simplified bottom structure of the LGP was proposed. The considered bottom structure of the LGP was proposed to be made up of same shape high energy V-Cut micro-structures, and the spacing between any two adjacent columns of the micro-structure was also the same. The design parameters were determined by using optimization technique. Also, the LCD design time could be reduced. In order to eliminate the dark region phenomenon caused by the proposed simplified bottom structure of the LGP, a simple new type of edge structure of the LGP was proposed also. The proposed simplified LGP design concepy has many merits, such as only three design parameters needed, manufacturing easily, the design time can be reduced, and can prevent the consumption of light source energy between the gaps of CCFL and LGP. The proposed design concept was applied on the design of 7 inches, 15 inches and 20 inches of backlight module (BLM). Through the numerical simulation by utilizing commercial software Light Tools, it can be shown that more than 80% of uniformity can be easily obtained. The second part focused on traditional dot pattern bottom structures. As the same concept mentioned in the first part, the proposed dot pattern was made up of same geometrival shape of dots, and the spacing between any two adjacent columns of the dots was also the same. The design parameters were determined by using optimization technique. The proposed design concept of the dot patten distribution can be applied on the design of LGP with either LED or CCFL light source. Also, the dark phenomenon did not occur, and so the corresponding edge structure did not need either. The proposed design concept was applied on the design of 7 inches, 15 inches and 20 inches of BLM with CCFL light source and on the design of 7 inches of BLM with LED light sources. The optical simulation results showed that about 90% of uniformity can be easily obtained.

In this paper, we searched the parameter of BEF (Brightness enhancement film) using commercial FRED server for backlight module. The pattern analysis was carried out to understand its characteristic. The current structures used in LCD backlight are double-layer BEF. In addition, BEF of 3M takes the lion¡¦s share. But this may increase the thickness and cost of backlight module. In order to avoid those disadvantages, we tried to design single-layer BEF and characterize the effect through parameters study by using FRED software simulation. pyramid-shaped microlens array of BEF was constructed. Therefore, the effect of the variation of the structure parameters can be analyzed, such as prismatic degree (£c), prismatic structure on the brightness enhancement. It can be found from the result of simulation that the changes of the prismatic degree (£c) of 85 degree influence the brightness enhancement the most.

When multiple cold cathode fluorescent lamps (CCFLs) are set up in a backlight module, parasitic capacitances are inevitably existent between the lamps and the aluminum back-plank. These parasitic capacitances are different from each other in introducing different leakage currents, and in turn cause current imbalance between lamps with undesired unequal brightness of the backlight module. In order to tackle this current imbalance problem, it relies critically upon a balance driving scheme. This thesis adopts the impedance-matching principle for a uniform light output. A detailed analysis and design of the balance circuit is implemented in a direct-type backlight module, which employs a series resonant parallel-loaded inverter with a transformer to generate a high AC voltage to drive multiple lamps. Adding appropriate capacitors on the load resonant circuits helps alleviate the discrepancy among lamp currents. Based on the experimental results, the maximum total current deviation is defined as an index of the current imbalance for multiple lamps system. Accordingly, the minimum impedance ratio can be provided for the designers to achieve balance driving. A prototype of the multi-lamp driving circuit with balance capacitors is designed and built for a backlight module with 16 lamps in a 32-inch liquid crystal display (LCD). Simulation and experimental results demonstrate the effectiveness and feasibility of the current balance scheme.

LCD panel industry is one of the most promising industries in the world. Taiwanese LCD panel makers have performed quite well in the past few years. On the controversy, the BLU has been viewed as a low entry barrier industry with many suppliers and its profit margin seems to have been squeezed due mainly to its position between big giant LCD panel makers and limited key materials suppliers. However, BLU is one of Taiwan's few competitive industries in the global market because of its high self-sufficient rate and leading technologies over their Korean and Japanese competitors. Sometimes, Taiwan¡¦s BLU industry is even performing better than other component industries within the LCD industry supply chain. It's worth examining the competitive advantages for Taiwan BLU industry by analyzing "Company R", one of the leaders in Taiwan BLU industry. We start our research by highlighting the key characteristics of the LCD industry and the dynamics of the BLU supply chain. After analyzing the marketing, technology, and management requirements for the BLU industry, we have concluded the key success factors of the BLU industry. Then with a brief introduction of ¡§Company R¡¨, we have identified the company's competitive advantages and potential long-term strategies by analyzing the company¡¦s unique positioning and resources, and comparing those with the above-mentioned key success factors of the BLU industry. According to our study, demand for BLU should continue to grow with increasing demand for LCD TVs, in longer term. The major issue for LCD panel industry will be "demand and supply" relationship, while for BLU industry is the "volume" and its "competitive advantages" for each company. The technology development for BLU will continue. BLU is not just a so-called ¡§assembling business¡¨, and its industry entry barrier is much higher than before. Besides, the cluster effect and vertical integration are inevitable for LCD panel makers. To be successful in BLU industry, a company not only needs to focus on these key success factors, but also needs to keep developing and improving its core competencies relative to its competitors.

技術採用生命週期（Technology Adoption Life Cycle）理論探討技術擴散過程中各階段消費者的行為，並進而使業者了解未來產業的發展趨勢與方向。本論文即嘗試透過結合技術採用生命週期理論，分析LED背光源應用所處之時空和市場，觀察LED產業商業模式的發展，從中尋找LED產業之智慧財產管理課題。LED產業於小型面板背光源的應用，如：手機、MP3、PDA、GPS、數位相機等，已然跨過技術採用生命週期所描述的龍捲風暴階段，進入康莊大道。另一方面，LED於中大型面板背光源的應用才正要刮起風暴，並期待著下一個殺手級應用—通用照明，引領極富綠色環保色彩的LED 產業繼續起飛。然而，因關鍵性專利始終握在國際大廠手上，限制了我國LED產業的發展，也阻礙了技術的擴散。幸而我國LED業者依舊在一片紅海中殺出重圍，成為LED產值世界第二大的基地，也成了國際大廠不得不倚重的對象。下一個風暴的成功，國際大廠仍需要透過授權或策略聯盟繼續壯大其勢力，這是我國LED業者的機會，亦可趁此持續發展技術，配合擅長的系統端整合應用，一舉取得逆轉勝門票。 / Technology Adoption Life Cycle theory discussed various behavior in different phases during the technology diffusion process to let industries learn the trend of future development. The thesis tries to analyze LED backlight application at this point of time and also tries to link up with Technology Adoption Life Cycle theory to find out intellectual property management issues in LED industry today. The LED backlight application on small LCD display, such as mobile phones, MP3, PDA, digital cameras, and GPS, had already passed through the tornado stage in the description of Technology Adoption Life Cycle theory, and it got into the main street stage for sure. On the other side, LED backlight application on medium/large LCD display is just blowing a storm now, and waiting for next killer application, general lighting, to lead the green energy industry a bright way as well. Nevertheless, the essential patents of LED are held by international firms all along. Our LED industry development is certainly limited and technology diffusion is restricted. Fortunately, LED firms in Taiwan still made a great breakthrough that Taiwan has become one of the top two LED product bases in the world. It made international LED firms have to rely on us in some degree. The next triumph to achieve may so far require licensing from big firms or to form a strategic alliance to foster it. It is our opportunity to keep improving our technology in system integration that we are good at, and cooperate with big firms to win the coming game in the foreseeable forture.

This work is focussed on different unwanted effects that damage a digitally acquired image. An image acquired using a digital camera can suffer from a series of defects. First, the noise is concerned. It occures due to discretisation. Next, there are the defects including vignetting, radial image distortion, chromatic aberration. In my thesis I also worked on backlight image compensation and panorama creation from an image sequence. For backlight images we need to increase the brightness in the dark parts of the image, so that the details became more visible. At panorama creation we are careful about brightness evenness in partial images, which is usually not conserved and consequently we try to find a suitable boundary-line to connect images and smooth it. The fundamental part of my work was writing the algorithms that are able to compensate these defects at least partly. For this aim I took use of the Matlab environment.

台灣最早投入TFT LCD是在1991年。發展早期只有兩家小公司，且受困於日本的技術屏障以及經營規模，一直無法有大格局的突破。直到1998年起，由於經濟開始衰退，日本方才開始陸續釋出TFT LCD相關技術，以授權或技轉方式讓技術開始擴散，此時方有多家台灣廠商開始陸續投入TFT LCD這個行業。 經過多年的努力，政府也漸漸開始重視TFT LCD產業，並且在2003年提出「兩兆雙星」五年國家經濟發展計畫，提供各種資源，全力扶植IC與TFT LCD兩項產業，其中TFT LCD被看好是台灣下一個產值破兆的產業，繼晶元代工之後下一個延續國家科技命脈的蓬勃生機。 從早期多數人連什麼是LCD都沒聽過，迄今八年時間，台灣LCD產業已經蓬勃發展，不僅擁有多家世界級大廠，亦成為全球平面顯示器重鎮。2007年也是台灣TFT LCD面板廠自成立以來最賺錢的一年，台灣整體平面顯示器產值首次超越韓國，整體產值並首度破兆，達到1兆2,849億台幣，其中台灣TFT LCD的產值就佔1兆2,149億台幣，佔全球TFT LCD總產值的44.5%。截至2007年為止，台灣本土TFT LCD上下游產業相關廠商共超過九十家，貢獻台灣GDP超過13%。 本文希望以TFT LCD上游材料行業背光模組為例，進行智慧財產與產業調查之工作，試著審視台灣TFT LCD關鍵零組件「背光模組」主要參與者之專利，藉由連結傳統專利分析與產業分析，從中找到能結合產業事實、專利品質和重要性的研究方法與結果，期能為台灣的背光模組行業，甚至是廣義的TFT LCD零組件行業提出一點意見與貢獻。 / Taiwan first engaged in TFT LCD industry in 1991. Only two small companies involved in the early stage; because of technical barriers established by Japan and insufficient economic scale of operation, there had been no breakthrough. Until 1998, the recession began, so that Japanese began to release the TFT LCD-related technologies by licensing or technology transfer, and resulting in the spread of technology. At this stage there are several Taiwanese manufacturers began to actively engage in TFT LCD industry. After years of efforts, the government has gradually begun to pay attention to TFT LCD industry. In 2003 the government put forward the "Two Trillion, Twin Stars" five-year national economic development plan, said plan provides resources to fully support both IC and TFT LCD industry, wherein TFT LCD is deemed next trillion industry, like Foundry, and may continue the lifeline of national science and technology. In the beginning, most people never heard of LCD. After eight years, Taiwan's LCD industry has flourished, not only has a number of world-class factories, but also has become a global center for flat panel displays. 2007 is also the most profitable year for Taiwan TFT LCD panel makers since their establishment. Taiwan's overall output value of flat panel displays exceed Korea for the first time; the overall revenue is about one trillion 2,849 billion Taiwan dollars, wherein Taiwan's TFT LCD accounted for 1 trillion 2,149 million Taiwan dollars, which also accounts for 44.5% share of the global TFT LCD output value. As of 2007, there are over 90 Taiwan companies related to TFT LCD industries, said companies contribute over 13% of GDP in Taiwan. This author wishes to take TFT LCD backlight industry as an example, performing investigation of intellectual property and industrial work, and try to examine the key patents of key players in the industry. The author looks forward to finding a new way to combine traditional patent analysis and industry analysis method, and make some contribution to the industry.