• Title, Summary, Keyword: LCD

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Novel Impulsive Driving Schemes for 120Hz LCD Panels

  • Nam, Hyoung-Sik;Oh, Jae-Ho;Shin, Byung-Hyuk;Oh, Kwan-Young;Berkeley, Brian H.;Kim, Nam-Deog;Kim, Sang-Soo
    • Journal of Information Display
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    • v.9 no.1
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    • pp.1-5
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    • 2008
  • Two new impulsive driving technologies for 120Hz liquid crystal display (LCD) panels are proposed to improve moving picture quality. One technology generates the dark frame using an adder and a shifter simply without using any look up tables (LUTs). It results in a cost effective impulsive scheme with motion picture quality comparable to that of high speed driving. The other is a backlight flashing method designed to avoid ghost images. The issue of ghost images caused by the slow response time of liquid crystal (LC) is solved by means of 120Hz overdriving and 120Hz backlight flashing. Using the perceived blur edge time (PBET) metric, measured moving picture response time (MPRT) values were 10.8ms and 4.4ms, respectively, while that of 120Hz high speed driving was 10.1ms.

Wide Viewing Angle ECB TFT LCD by a Single Discotic Optical Compensation Film

  • Park, Ku-Hyun;Hong, Hyung-Ki;Shin, Hyun-Ho;Chung, In-Jae
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.800-802
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    • 2006
  • A simple wide-viewing-angle solution of electrically controlled birefringence (ECB) LCD is proposed, which is based on a single discotic compensation film. The use of a single discotic film instead of two leads to a considerable reduction in cost while high performance is maintained.

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Recent LCD driving technologies for stereoscopic FHD 3D display system

  • Choi, Hee-Jin;Lee, Jun-Pyo;Kim, Jung-Won;Kim, Seon-Ki;Kim, Nam-Deog
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.438-440
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    • 2009
  • In this paper, we describe the latest LCD driving technology which helps to realize the stereoscopic 3D display system with FHD resolution by using the 240Hz LCD panel. The 240Hz LCD system has two times more data than current 120Hz and can cover the crosstalk due to the progressive scan.

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LCD Embedded Hybrid Touch Screen Panel Based on a-Si:H TFT

  • You, Bong-Hyun;Lee, Byoung-Jun;Lee, Jae-Hoon;Koh, Jai-Hyun;Takahashi, Seiki;Shin, Sung-Tae
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.964-967
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    • 2009
  • A new hybrid-type touch screen panel (TSP) has been developed based on a-Si:H TFT which can detect the change of both $C_{LC}$ and photo-current. This TSP can detect the difference of $C_{LC}$ between touch and no-touch states in unfavorable conditions such as dark ambient light and shadows. The hybrid TSP sensor consists of a detection area which includes one TFT for photo sensing and two TFTs for amplification. Compared to a single internal capacitive TSP or an optical sensing TSP, this new proposed hybrid-type TSP enables larger sensing margin due to embedding of both optical and capacitive sensors.

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