• Title, Summary, Keyword: LCD

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Development of OCB mode with impulsive driving scheme for improving moving picture quality

  • Kim, J.L.;Lee, C.H.;Park, S.Y.;Yoo, S.W.;Oh, J.H.;Lee, S.H.;Chai, C.C.;Park, C.W.;Ban, B.S.;Ahn, S.H.;Hong, M.P.;Chung, K.H.;Lim, S.K.;Kim, K.H.;Souk, J.H.
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.1049-1052
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    • 2004
  • In general, contrary to the CRTs with impulsive emission, liquid crystal displays have motion artifacts such as blurring. ghost image, decrease of dynamic CR(contrast ratio), and stroboscopic motion due to hold type driving method. In this paper, to improve motion picture quality of LCDs. impulsive driving method of black data insertion was applied to the OCB mode which is well known for its fast LC response time and wide viewing angle properties. Subject evaluation was carried out with CRT, TN, SIPS(Super IPS). and impulsive driving OCB. Moving picture image quality near CRT was obtained in impulsive OCB driving mode

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All Layer Printed TFT-LCD Device by Large Area UV-Imprinting Lithography

  • Chang, Jae-Hyuk;Lee, Seung-Jun;Park, Dae-Jin;Bae, Joo-Han;Lee, Sung-Hee;Kim, Jang-Kyum;Kim, Kyu-Young;Bae, Jung-Mok;Kim, Bo-Sung;Lim, Soon-Kwon
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.1115-1117
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    • 2009
  • Resist patterning of all layers in TFT and BM layer in CF were carried out using UV-imprinting Lithography to make a 12.1 inch TFT-LCD panel at the resolution of 1280 ${\times}$ 800 lines (125 ppi). Technical challenges and solutions for resist patterning by UV-imprinting are shown in this article.

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An Internal Touch Screen Panel Using Standard a-Si:H TFT LCD process

  • You, Bong-Hyun;Lee, Byoung-Jun;Lee, Ki-Chan;Han, Sang-Youn;Koh, Jai-Hyun;Takahashi, Seiki;Berkeley, Brian H.;Kim, Nam-Deog;Kim, Sang-Soo
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.250-253
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    • 2008
  • A touch screen panel embedded 12.1-inch TFT LCD employing a standard a-Si:H TFT process has been successfully developed. Compared with conventional external touch screen panels, the new internal TSP exhibits a clearer image and improved touch feeling. Our new internal proposed TSP can be fabricated with low cost.

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Development of 15-in XGA TFT-LCD with Viewing-angle Image Control

  • Jin, H.S.;Chang, H.S.;Park, J.K.;Yu, S.K.;Lee, D.S.;Chung, I.J.
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.463-465
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    • 2006
  • We have developed the VIC (Viewing-angle Image Control) TFT-LCD, which can change viewing-angle from $80^{\circ}$ to $170^{\circ}$. This display has the same thickness and weight as existing TFT-LCD, because it is made of only single LC cell without additional components. Moreover, we developed ways to protect effectively the displayed information in narrow viewing angle mode.

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A Novel Pixel structure suitable for color scanner embedded TFT-LCD

  • Choo, Kyo-Seop;Kang, Hee-Kwang;Yu, Jun-Hyeok;Do, Mi-Young;Choo, Kyo-Hyuck;Lee, Deuk-Su;Kang, In-Byeong;Chung, In-Jae
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.1327-1329
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    • 2007
  • We developed a 4 inch (qVGA, 320x240) a-Si TFT LCD which has the function of color scanner. We have designed the novel pixel structure and got good scanning quality with minimum aperture loss. In this new pixel, the sensor capacitance was increased in double without decreasing the aperture loss.

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Cost competitive Pixel Structures for Mobile PVA LCDs

  • Cho, Seon-Ah;Lyu, Jae-Jin;Sohn, Ji-Won;Park, Jin-Won;Park, Seung-Beom;Yang, Sung-Hoon;Jung, Mee-Hye;Kim, Kyeong-hyeon;Kim, Sang-Soo
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.1639-1641
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    • 2007
  • We have designed cost competitive pixel structures for high performance mobile PVA LCDs. These new structures significantly bring down the price by the use of a conventional polarizer for lowest possible cost. A 4.3" prototype based on these techniques was built, achieving the world's highest mobile display contrast ratio of 1200:1, while maintaining wide viewing angle with no loss of transmittance

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Backlight for Large-area LCD-TVs using Light Emitting Diodes

  • Choi, Jong-Hyun;Chu, Haang-Rhym;Bang, Ju-Young;Park, Hee-Jeong;Hong, Hee-Jung;Lim, Moo-Jong;Oh, Eui-Yeol;Chung, In-Jae
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.1153-1156
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    • 2005
  • A backlight for large-area LCD (Liquid Crystal Display)-TVs has been developed using Light Emitting Diodes (LEDs). Performances of the backlight and the methods driving the LEDs are introduced in this research. A spectral relationship between the LEDs and the color filters of a panel were investigated as well. In order to realize a CRT like dynamic effect, the area-focused luminance control (AFLC) technology was adopted in developing the backlight. Thus, a possibility of applying the LEDs to the backlight for large-area LCD-TVs was systematically proved.

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6 Mask LTPS CMOS Technology for AMLCD Application

  • Park, Soo-Jeong;Lee, Seok-Woo;Baek, Myoung-Kee;Yoo, Yong-Su;Kim, Chang-Yeon;Kim, Chang-Dong;Kang, In-Byeong
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.1071-1074
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    • 2007
  • 6Mask CMOS process in low temperature polycrystalline silicon thin film transistors (poly-Si TFTs) has been developed and verified by manufacturing a 6Mask CMOS AMLCD panel. The novel 6Mask CMOS process is realized by eliminating the storage mask, gate mask and via open mask of conventional structure.

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Area-Focused Luminance Control Backlight for LCD TV applications

  • Hong, Hee-Jung;Kwon, Kyung-Joon;Choi, Jong-Hyun;Lee, Si-Hoon;Hwang, Hak-Mo;Lim, Moo-Jong;Oh, Eui-Yeol;Chung, In-Jae
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.1157-1160
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    • 2005
  • In order to improve the image quality of a large size LCD-TV, the Area-Focused Luminance Control (AFLC) technology with data processing algorithm has been developed. The AFLC backlight consists of 16 U-shaped lamps, and controllable areas are divided into 8 blocks. Based on the AFLC technology, the backlight luminance of each block is automatically and separately controllable. Consequently, the contrast ratio is greatly enhanced whereas the corresponding power consumption is decreased as compared with those of conventional backlights.

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High Color Depth Driver LSIs for TFT-LCDs

  • Jang, Chul-Sang;Yoo, Juhn-Suk;Lee, Dong-Hoon;Kim, Jong-Hoon;Chung, In-Jae;Kim, Jin-Ho;Choi, Jin-Chul;Lee, Jae-Sic;Kim, Seon-Yung;Kwon, Oh-Kyong
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.657-658
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    • 2005
  • We designed 10bit source driver LSI, then the high color depth and the low power consumption are realized thru it. It is adopted mini-LVDS receiver with high speed data transmission and good data recovery performance, Hybrid type DAC to reduce decoder size and OP-AMP with low power consumption and high slew rate. In addition we show our results of the 10-bit gray scale TFT-LCD source driver for 42inch diagonal size and WXGA resolution TFT-LCD TV applications.

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