• Title, Summary, Keyword: LCD

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PLD Design of LCD Drive Circuit using PC Interface (PC 인터페이스를 이용한 LCD 구동회로의 PLD 설계)

  • Lee, Seung-Ho;Lee, Joo-Hyun
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.16 no.1
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    • pp.67-75
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    • 2002
  • This paper presents a PLD design of Gray Mode Graphic STN LCD drive circuit using PC interface. The proposed LCD drive circuit doesn\`t use microprocessor for the convenience of users. Thus, the LCD drive circuit can transfer efficiently image data created under PC to LCD. The LCD drive circuit which is modelled in schematic capture, AHDL and VHDL is simulated in functionally through the use of ALTERA MAX+PLUS II. Also, timing simulation is performed by ALTERA EPM7192SQC160-15 PLD implementation. The PC interface part have been programmed in MS-Visual C++ 6.0. The validity and efficiency of the proposed LCD drive circuit have been verified by test board. After comparing this LCD drive circuit to specify it was verified that the developed LCD drive circuit showed good performances, such as convenience of users, low cost.

Development of a 14.1 inch Full Color AMOLED Display with Top Emission Structure

  • Jung, J.H.;Goh, J.C.;Choi, B.R.;Chai, C.C.;Kim, H.;Lee, S.P.;Sung, U.C.;Ko, C.S.;Kim, N.D.;Chung, K.
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.793-796
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    • 2005
  • A structure and a design of device were developed to fabricate large-scale active matrix organic light-emitting diode (AMOLED) display with good color purity and high aperture ratio. With these technologies, we developed a full color 14.1 inch WXGA AMOLED display. For the integration of OLED on an active matrix a-Si TFT backplane, an efficient top emission OLED is essential since the TFT circuitry covers a large position of the pixel aperture. These technologies will enable up the OLED applications to larger size displays such as desktop monitors and TVs.

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Structural Analysis of LCD Monitor (LCD 모니터의 구조해석)

  • Lee, Jong-Sun
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.14 no.9
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    • pp.4191-4196
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    • 2013
  • In this paper, structural analysis was made on two cases in order to develop free rotational method and rotational angle in LCD monitor. The configuration of LCD monitor in field was modeled by using 3-D design program CATIA V5 and structural analysis was done to the modeled LCD in order to obtain stress, strain and total deformation by using ANSYS finite element analysis program.

Super-PVA (S-PVA) Technology for HDTV Application

  • Kim, Kyeong-Hyeon;Berkeley, Brian;Kim, Sang-Soo;Souk, Jun-Hyung
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.26-29
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    • 2004
  • S-PVA is a new technology which enables screen quality advantages over S-IPS and MVA, including high transmittance, >1000:1 contrast ratio, sub-10ms response time, and wide angle of view with no off-axis image inversion and undetectable gamma distortion. This new technology will be described in detail. This paper also addresses the other remaining performance issues facing LCD-TV, including Samsung's plans for addressing these challenges. For example, until recently, inter-gray response time and associated motion blur were significant issues for achieving LCD-TV images quality. Samsung has invented DCC-II technology to achieve sub-10ms response time, and this achievement is described herein. Other technology advancements, including next-generation color performance and ultra-low black performance and improvement of off axis image quality are also discussed in this paper.

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Development of Driver IC on TFT-based Liquid Crystal Display

  • Pan, Po-Chuan;Koo, Horng-Show
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.381-384
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    • 2005
  • Driver IC is one of the key components on the LCD monitor and LCD/TV. The function of the driver IC is to transfer and forward the input signals to LCD panel module. Inside driver IC, there are several operating units which process the input signals and generate the appropriate size and resolution to the LCD panel module. LCD panel module will display these input signals. However, there are some difficulties which driver IC designer, LCD monitor and LCD/TV maker will face. Thus, this article addresses the function and difficulties on driver IC.

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On Development of LCD Simulation Program (LCD Simulation용 Program 개발)

  • Lee, Byeong-Hoon;Lee, Han-Yong
    • Proceedings of the KIEE Conference
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    • pp.1255-1261
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    • 1995
  • The development of LCD Simulation program has been targeted to the design and estimation of LCD in an efficient, reasonable and proper method. In developing this program, we have got the theoretical construction for analysis of LCD. Moreover, we've applied CAE to the field of LCD, and thus we could help finding the optimal condition of LCD design or new type of LCD. This software can be applied for the modes such as TN, mono-STN, B/W STN(DSTN, FSTN), color STN, TFT, reflective modes and the program can be developed for other modes.

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Recent Trends in Optical Materials of Backlight for LCD Display

  • Dong, Hyun-Soo;Jeong, O-Yong
    • Proceedings of the Polymer Society of Korea Conference
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    • pp.148-149
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    • 2006
  • TFT-LCD BLU has been remarkably developed for a recent few years as TFT-LCD market is increased. Recently new BLU technologies and components are developed as more aggressively than before since TFT-LCD panel requires higher quality and resolution. Especially Samsung Electronics and LG Philips LCD of Korea are major LCD panel makers and the major optical materials of LCD BLU and panel for Samsung Electronics have been supplied by Samsung Cheil Industries. In this presentation introduction to main components of LCD BLU will be investigated details. Also characteristics and applications of optical polymers such as PMMA, PET etc for LCD display will be included and finally recent trends in optical materials for LCD BLU will be shown briefly.

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2.22-inch qVGA ${\alpha}$-Si TFT-LCD Using a 2.5 um Fine-Patterning Technology by Wet Etch Process

  • Lee, J.B.;Park, S.;Heo, S.K.;You, C.K.;Min, H.K.;Kim, C.W.
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.1649-1652
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    • 2006
  • 2.22-inch qVGA $(240{\times}320)$ amorphous silicon thin film transistor liquid active matrix crystal display (${\alpha}$- Si TFT-AMLCD) panel has been successfully demonstrated employing a 2.5 um fine-patterning technology by a wet etch process. Higher resolution 2.22-inch qVGA LCD panel with an aperture ratio of 58% can be fabricated because the 2.5 um fine pattern formation technique is combined with high thermal photo-resist (PR) development. In addition, a novel concept of unique ${\alpha}$-Si TFT process architecture, which is advantageous in terms of reliability, was proposed in the fabrication of 2.22-inch qVGA LCD panel. Overall results show that the 2.5 um finepatterning is a considerably significant technology to obtain higher aperture ratio for higher resolution ${\alpha}$-Si TFT-LCD panel realization.

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Study on Defect Cell Extraction of TFT-LCD Panel (TFT-LCD 결함패턴 추출에 관한 연구)

  • Cho, Jae-Soo;Ha, Gwang-Sung;Lee, Jin-Wook;Kim, Dong-Hyun;Jeon, Edward
    • Proceedings of the KIEE Conference
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    • pp.151-152
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    • 2007
  • 본 논문은 TFT-LCD 영상에서 결함을 자동검색하여 결함이 있는 LCD 영상의 경우 결함이 있는 LCD 패턴을 정확하게 추출해 내는 방법을 제안하였다. TFT-LCD 영상에서 결함이 있는 LCD 패턴 검색은 세단계로 이루어진다. 1단계는 먼저 입력영상에서 LCD 패턴영상의 특징을 이용하여 각 LCD 패턴의 기준점을 찾는다. 2단계는 1단계에서 찾은 여러 기준점 중에서 필터링과정을 통하여 정확한 한 개의 기준점을 최종 선택한다. 마지막으로 3단계에서는 최종적으로 선택된 기준점을 이용하여 결함정의(결함중심 및 결함사이즈)를 이용하여 결함이 포함되어 있는 LCD 패턴을 추출한다. 제안된 결함패턴 추출 알고리즘의 정확성은 컴퓨터 시뮬레이션을 통하여 그 효용성을 증명하였다.

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The PLD Design of New Scheme LCD Driver Circuit (새로운 LCD 구동회로의 PLD 설계)

  • 이주현;이승호
    • Proceedings of the IEEK Conference
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    • pp.947-950
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    • 1999
  • The PLD design of new scheme LCD driver circuit is described in this paper. A new scheme LCD driver circuit doesn't used microprocessor for the convenience of users. A new scheme LCD driver circuit consists of 4 main parts, that is, a serial/parallel communication control block part, a LCD controller part, a LCD driver part and a RAM/ROM control block part. The validity and efficiency of the proposed LCD driver circuit have been verified by simulation and by ALTERA EPM7192SQC160-15 PLD implementation in VHDL. After comparing this LCD driver circuit to specify it was verified that the developed LCD driver circuit showed has good performances, such as low cost, convenience of users.

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