• 제목/요약/키워드: LCD

검색결과 3,524건 처리시간 0.054초

Acceptable Luminance Levels of a LCD TV Based on Glare of Human Visual System

  • Kim, Ki-Duk;Ahn, Ji-Young;Yoon, Jae-Kyung;Shin, Hyun-Ho;Chung, In-Jae
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.I
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    • pp.125-128
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    • 2005
  • The visual perception tests were conducted to determine limits of luminance of a LCD TV from a viewpoint of glare. The results showed that people, who watch TV in their living room, perceive glare above $410\;cd/m^2$ at full window and $590\;cd/m^2$ at 1/25 window.

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A New Cost-Effective Optical Plate for High Performance LCD-TVs

  • Ha, Ju-Hwa;Paek, Jung-Wook;Jang, Tae-Seok;Choi, Jin-Sung;Jung, Young-Sub
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권1호
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    • pp.940-943
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    • 2007
  • The objective of the research presented in this paper is to design a highly efficient LCD-TV backlight unit (BLU) which minimizes lamp count without light leakage from the BLU. A new optical plate helps to successfully distribute spatial luminance in a 46inch LCD-BLU consisting of only 20 CCFLs.

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경사진 자외선 조사를 이용한 TN-LCD의 전기광학 특성 (Electro-optical performance of TN-LCD wish oblique UV light irradiation on polyimide surface)

  • 서대식;박두석;한정민;황율연;박태규
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 1998년도 춘계학술대회 논문집
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    • pp.113-116
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    • 1998
  • In this paper, we studied the electro-optical(EO) performance of photo-aligned twisted nematic(TN)-liquid crystal display(LCD) with oblique non-polarized ultraviolet(UV) light irradiation on polyimide(Pl) surface. We observed that the voltage-transmittance and response time characteristics of photo-aligned TN-LCD is almost same compared to conventional TN-LCD. Also, we observed that the voltage-holding-ratio(VHR) of photo-aligned TN-LCD is almost same compared to conventional TN-LCD.

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전사배향 TN-LCD 에서의 배향막의 극성효과에 관한 연구 (Study on of polarity effect on alignment film in transcription-aligned TN-LCD)

  • 김진호;서대식
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1999년도 하계학술대회 논문집 D
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    • pp.1812-1814
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    • 1999
  • The effects of polarity of the polymer on transcription-aligned twisted nematic (TN)-liquid crystal display (LCD) on various the polyimide (PI) surfaces were investigated. The monodomain alignment of nematic (N)LC is obtained in cells fabricated by transcription alignment method on PI surface with medium polarity. The LC alignment using transcription alignment method is attributed to polarity of the polymer. The threshold voltage of transcription-aligned TN-LCD decreases with increasing the polarity of the polymer on three kinds of the PI surfaces. The threshold voltage of transcription-aligned TN-LCD on PI surface with high polarity is almost the same compared to rubbing-aligned TN-LCD. The response time of transcription-aligned TN-LCD decreases with the increasing the polarity of the polymer on all PI surfaces. The decay time of transcription-aligned TN-LCD is slow compared with the rubbing-aligned TN-LCD.

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Development of a 30-in. wide-QXGA+ TFT-LCD for High-Information-Content Displays

  • Choi, H.C.;Hong, S.G.;Lim, B.H.;Lee, S.W.;Yeo, S.D.
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2004년도 Asia Display / IMID 04
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    • pp.19-22
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    • 2004
  • A 30-inch WQXGA+ TFT-LCD Monitor has been developed based on in-plane switching mode with multi-domain. This product adopts Cu electrode which, in spite of low resistivity, was not applied to TFT LCD products because of productivity and reliability problems etc. This low resistivity material makes it possible to clear the problem caused by line delay in such high resolution TFT-LCDs. As a results of successful adoption of innovative materials and technologies, our world's largest TFT-LCD Monitor has best performance for high information display.

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Comparison of Degradation Phenomenon in the Low-Temperature Polysilicon Thin-Film Transistors with Different Lightly Doped Drain Structures

  • Lee, Seok-Woo;Kang, Ho-Chul;Nam, Dae-Hyun;Yang, Joon-Young;Kim, Eu-Gene;Kim, Sang-Hyun;Lim, Kyoung-Moon;Kim, Chang-Dong;Chung, In-Jae
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2004년도 Asia Display / IMID 04
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    • pp.1258-1261
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    • 2004
  • Degradation phenomenon in the low-temperature polysilicon (LTPS) thin-film transistors (TFTs) with different junction structures was investigated. A gate-overlapped lightly doped drain (GOLDD) structure showed better hot-carrier stress (HCS) stability than a conventional LDD one. On the other hand, high drain current stress (HDCS) at $V_{gs}$ = $V_{ds}$ conditions caused much severe device degradation in the GOLDD structure because of its higher current level resulting in the higher applied power. It is suggested that self-heating-induced mobility degradation in the GOLDD TFFs be suppressed for using this structure in short-channel devices.

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Tuning Effects of High Optical Efficiency on External Electrode Fluorescent Lamp

  • Kim, Ki-Seong;Jeon, Hyun-Woo;Hong, Jin-Woo;Yoon, Jung-Hyun;Kim, Jae-Bum;Jeong, Byoung-Koan;Shin, Jong-Keun;Chung, In-Jae
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권2호
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    • pp.1531-1533
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    • 2007
  • We made a high-efficiency lamp with same spec. as a normal lamp by improving physical constants of a lamp and then analyzed varied effects. By applying novel physical constants to an EEFL, we acquired decrease of lamp operating power and voltage.

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액정디스플레이 (LCD) 판넬유리 운반로봇의 진동저감에 대한 연구 (Vibration Attenuation Study for an LCD Pannel Handling Rotot)

  • 탁태오;김헌영;전형호;오용빈
    • 산업기술연구
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    • 제24권B호
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    • pp.73-81
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    • 2004
  • The development of efficient and precise handling of an liquid crystal display (LCD) panel has been addressed as the sizes of LCD panels become much larger than ever. The majority part of LCD panel handling is conducted by industrial robots for the cost reduction and the quality control. A challenging problem, vibration of the panel, can be found when the robots are utilized for handling LCD panels. The vibration causes the poor product precision and the low productivity. The characteristics of LCD panels, which are the high size-to thickness ratio, the high elasticity, and the high brittleness, are the major sources of the vibration This paper introduces the vibration attenuation techniques to overcome the difficulties encountered in the LCD production using the industrial robots.

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Dry Etch Process Development for TFT-LCD Fabrication Using an Atmospheric Dielectric Barrier Discharge

  • Choi, Shin-Il;Kim, Sang-Gab;Choi, Seung-Ha;Kim, Shi-Yul;Kim, Sang-Soo;Lee, Seung-Hun;Kwon, Ho-Cheol;Kim, Gon-Ho
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2008년도 International Meeting on Information Display
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    • pp.1272-1275
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    • 2008
  • We present the development of dry etch process for the liquid crystal display (LCD) fabrication using a dielectric barrier discharge (DBD) system at atmospheric pressure. In this experimental work, the dry etch characteristics and the electrical properties of thin film transistor are evaluated by using the scanning electron microscopy and electric probe, and TFT-LCD panel ($300\;mm\;{\times}\;400\;mm$) is manufactured with the application of the amorphous silicon etch step in the 4 mask and 5 mask processes.

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A Novel Pixel Structure for High Transmission TFT-LCD

  • Shin, Kyoung-Ju;Song, Se-Young;Lee, Il-Pyung;Kim, Chang-Hoon;Jang, Chang-Soon;Chai, Chong-Chul;Souk, Jun-Hyung
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2008년도 International Meeting on Information Display
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    • pp.208-210
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    • 2008
  • We have developed a LCD Panel that form storage capacitance for pixels between pixel electrode of bottom glass and common electrode of top glass. This method could make higher transmission and higher production yield than before by removing storage electrode line and capacitance on the bottom glass by simplifying bottom pixel structure.

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