• 디지털콘텐츠학회 논문지
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• 제6권3호
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• pp.169-174
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• 2005

본 논문은 Verilog HDL로 FPGA에 JPEG Decoder를 구현하여 TV에 JPEG 영상을 디스플레이 하기 위한 JPEG Image Display Board 설계 방법을 제안한다. 본 논문은 FPGA에 Decoder Algorithm을 구현하기 위한 효율적인 방안을 제시하였으며 JPEG Decoder Algorithm은 JPEG Standard Baseline에 기준으로 하여 설계 하였다. 압축된 JPEG bit stream을 저장하기 위하여 Nand Flash Memory를 사용하였으며, JPEG Decoding된 영상을 TV화면에서 확인하기 위하여 Video Encoder를 사용하였다. 또 한 JPEG 영상에 Text data를 쓰기 위하여 YCbCr의 출력 bit를 RGB 24bit로 변환하였다. Video Encoder에 변환된 RGB Data를 동기시켜 출력하기 위하여 CVBS 입력을 Sync Separator에 의해 Hsync, Vsync, Sync, Field signal로 분리하였다. 또한 Display B/D상의 스위치를 통하여 JPEG 모드와 일반영상 모드를 선택할 수 있게 입증하였다.

• Journal of Information Display
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• 제7권4호
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• pp.24-26
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• 2006

We have developed a new driving method named TROPHY(Talented Role-playing Technology with Dual Polarity sustainer in Hybrid Mono board). In this method, the sustain voltage is partially compared to the conventional method and the number of power sources is reduced by voltage level unification during the reset, address and sustain period. The hybrid mono board was especially developed to implement those technologies. Through this, we can lower the cost with the TROPHY compared to the conventional one. It is a suitable technology to improve the reliability of circuit and image sticking problem. We can also reduce the number of driving boards and the EMI problem compared with those of the conventional method.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2004년도 전력전자학술대회 논문집(2)
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• pp.851-854
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• 2004

This paper studies Optical Fiber(OF) - LED illuminated display board system for energy saving. The OF-LED illuminated display board system has PV modules, batteries, and charge & discharge system, and dynamic full color display controller. Both maximum power point tracker (MPPT) and constant current & constant current controls (CCVC) are used In govern the charging system. It can be improve the charging efficiency of battery. The objective of this thesis paper is to build advertisement lighting system with OF-LED in to charge a 12-volts lead acid battery by using a field wired PV array. We saved the maintenance cost and developed of advertisement effectiveness. To verify the proposed OF-LED illuminated display board system for energy saving, the detail simulation and experiment results indicate that operating characteristics are verified by experiment with a laboratory prototype in this paper.

• 조명전기설비학회논문지
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• 제27권9호
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• pp.36-43
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• 2013

The prevalence of electronic devices in our modern life is accompanied with the generation of harmonics caused by the nonlinear characteristic load. Especially, the employment of LED have brought the rapid use of SMPS. SMPS is used for supplying the constant DC electric power to the LED display board, but it has a big problem which gives birth of harmonics causing by its high-speed switching. measurement HIOKI 3196 equipment to solve these harmonics were measured. In this study, we are LED Display Board Load Measuring the impedance response with $X_L$ changes for removing harmonics in the measured. And we adopted the suitable passive filter by the impedance response characteristic obtained in the $X_L$ variation experiments. We are trying to deeply the application of passive harmonic filter characteristics that generation in the LED Display Board through EDSA LED simulation.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2006년도 6th International Meeting on Information Display
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• pp.246-249
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• 2006

We have developed a new driving method named TROPHY(Talented Role-playing Technology with Dual Polarity sustainer in Hybrid Mono board). In this method, the sustain voltage is halved compared to the conventional method and the number of power sources is reduced by voltage level unification during the reset, address and sustain period. The hybrid mono board was especially developed to implement those technologies. Therefore, we can lower the cost with the TROPHY compared to the conventional one. It is suitable technology to improve the reliability of circuit and image sticking problem. We can also reduce the number of driving boards and the EMI problem comparing to those of the conventional method.

• 대한인간공학회지
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• 제1권2호
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• pp.17-23
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• 1982

Application of color coding to a jack board-type display has not yet been tried. The purpose of this paper is to study the effects of color coding on a jack board-type display. Ten subjects searched 10*20 arrays of numbers for the presence or absence of a color coding. Five colors were used for the coding. Three subjects were selected among 10 subjects to repeat 11 times the above experiments. Detection time was reduced by 6.6% for the color coding condition. Three subjects did not show any results different from those in their inexperienced state, except the learning effect during repetition of the experiments. The results imply that the color coded jack board-type display may be efficient either to inexperienced subjects or to experienced subjects.

• 한국ITS학회:학술대회논문집
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• 한국ITS학회 2006년도 제5회 추계학술대회 및 정기총회
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• pp.276-280
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• 2006

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2008년도 International Meeting on Information Display
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• pp.1491-1494
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• 2008

Typically internal mobile LCD display modules are connected to the mobile product baseband PCB with flexible printed circuit board equipped with board-to-board connector. This solution has a drawback of limiting the product concept work to certain solutions that are based on connector size, location, flexible PCB length, bending, etc. in the display module. Also flexible printed circuit board based solutions are not completely optimized from reliability point of view, causing flex circuit board breakings. For the external displays in the PC or Home entertainment market, the cable solution is too expensive and resource demanding. The wireless solution has obvious advantages over reliability, low cost and flexibility. This paper describes a wireless audio-visual interface solution.

• 전자공학회논문지
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• 제50권10호
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• pp.135-141
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• 2013

본 논문에서는 적색, 녹색, 청색의 세 가지 고휘도 LED를 하나의 소켓에 설치하여, 하나의 화소체 단위를 만들고, 이 화소체들의 조합과 다수 모듈들의 조합으로 문자, 그래픽, 동영상 등의 다양한 영상을 표출할 수 있는 풀컬러 전광판 모듈 및 제어장치를 개발하였다. LED 전광판 드라이버 모듈은 일정한 단위 면적에 RGB 픽셀을 조합한 도트에 드라이버 회로가 내장된다. 기존의 이러한 모듈형태는 특정 공간 및 설치 공간에 고정된 해상도를 구현하므로 가격이 높게 책정될 수 있다. 이러한 단점을 극복하기 위하여 임의의 피치 간격으로 배열이 자유로운 LED 드라이버 및 이에 따른 LED 픽셀 모듈을 개발하였다. 본 논문의 전광판 모듈은 기존 각각의 LED 모듈을 구동함에 있어서 병렬 방식의 데이터 처리 방식을 픽셀을 기준으로 그 위의 서브 모듈과 그 상위에 마스터 모듈의 개념을 도입하고 각각의 화소를 직병렬 통신 방식으로 개선함으로 인해서 처리할 수 있는 데이터의 속도를 초당 36프레임 이상으로 끌어올려서 상대적으로 데이터의 처리량이 많은 동화상의 경우에도 원활한 디스플레이를 할 수 있도록 하였다. 또한 기존 전광판의 깜박거림 현상이 개선되어 보다 선명한 영상이 제공되는 효과도 있다.

• 한국운동역학회지
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• 제13권3호
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• pp.99-116
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• 2003

The purpose of this study was to kinematics factors on during round-off at end of beam-salto backward stretched with step-out to cross on balance beam. Four elite female gymnastics players participated as subject of this study. The methods of this study was analyzed using three dimentional analysis. The results and conclusion of this paper is obtained as follows ; 1. The phase of time was the most short time in board touch down phase and board take-off phase. Also, it was shown a more long time in total time compared to previous study. 2. The horizontal displacement of each phase was shown the most high levels in balance beam landing. The vertical displacement was display a non-linearity increase in board take-of phase, and it was shown the most high levels in vertical displacement during landing of balance beam. 3. The horizontal velocity of each phase was shown the most high levels in board touch down, and it was display a gradually decreased levels because flight during board take-of. The resultant velocity of CG on each phase was shown the most high levels in board touch down and board take-off. 4. The angle of hip joint was shown the most high levels as performed a motion in extension state during board take-off, and the angle of knee joint was display a increased levels because of flight cause body extension in board take-off. Also the angle of ankle joint was shown a increasing levels during board take-off. Considering to this results, it is suggest that the change of kinematics factors in board touch down and board take-off is key role on the effective board control.