• Title, Summary, Keyword: LCD

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A Study of Performance Improvement through using extending Display of Iphone(smart phone) LCD(TFT or AMOLED) to overcome expression limit of Normal LCD(Seg) for Car audio (CAR audio용 일반 Seg LCD의 표현의 한계를 극복하기 위한 IPHONE(SMART PHONE) LCD(AMOLED,TFT)의 확장 DISPLAY 사용에 대한 성능 개선에 관한 연구)

  • Hwang, Man-Tae;Kim, Yound-Cil
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.325-328
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    • 2010
  • In this paper, To overcome expression limit of Normal LCD(Seg) for Car audio, We research using Smart phone(Iphone) LCD to overcome weakness of seg LCD, We can express detail LCD DISPLAY using Smartphone(iphone), We can call Car to phone, Smartphone(Iphone) Display can Normal Car audio function Display, using phone Application for car to phon.

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Development of 200ppi SOG-LCD

  • Kim, Chul-Ho;Kim, Chul-Min;Moon, Kook-Chul;Park, Kee-Chan;Kim, Il-Gon;Joo, Sueng-Yong;Park, Tae-Hyeong;Maeng, Ho-Suk;Jung, Eu-Jin;Kim, Chi-Woo
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.85-88
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    • 2004
  • 2-inch qVGA (240${\times}$320) TFT-LCD with integrated 6-bit source driver is reported. The pixel density is over than 200ppi and the operation frequency is about 2.8MHz. In order to improve TFT characteristics, TS-SLS (Two-Shot Sequential Lateral Solidification) technology has been employed. A 1:6 demultiplexing scheme has been successfully implemented in the source driver owing to the superb characteristics of the TS-SLS TFTs, which resulted in small driver circuit area.

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2.8 inch QVGA System On Panel LCD Employing Advanced CMOS LTPS Technology

  • Yoon, Ji-Mo;Yoo, Juhn-S.;Yu, J.S.;Kim, E.;Son, C.Y.;Park, J.K.;Yoo, Y.S.;Lim, K.M.;Kim, C.D.;Chung, I.J.
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.285-288
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    • 2005
  • A 2.8 inch fully integrated SOP employing a high performance LTPS CMOS TFT technology has been developed for mobile display applications. The LCD module is directly interfaced with 3V 6-bit RGB source via timing control circuitry. The integrated data driver comprises a 6-bit hybrid type DAC with low power analog buffer.

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Integrated Gate Driver Circuit Using a-Si TFT with AC-Driven Dual Pull-down Structure

  • Jang, Yong-Ho;Yoon, Soo-Young;Kim, Binn;Chun, Min-Doo;Cho, Hyung-Nyuck;Cho, Nam-Wook;Sohn, Choong-Yong;Jo, Sung-Hak;Choi, Seung-Chan;Kim, Chang-Dong;Chung, In-Jae
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.944-947
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    • 2005
  • Highly stable gate driver circuit using a-Si TFT has been developed. The circuit has dual-pull down structure, in which bias stress to the TFTs is relieved by alternating applied voltage. The circuit has been successfully integrated in 4-in. QVGA and 14-in. XGA TFT-LCD with a normal a-Si process, which are stable for over 2,000 hours at $60^{\circ}C$. The enhancement of stability of the circuit is attributed to retarded degradation of pull-down TFTs by AC driving.

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Oxide Semiconductor TFTs for the Next Generation LCD-TV Applications

  • Lee, Je-Hun;Kim, Do-Hyun;Yang, Dong-Ju;Hong, Sun-Young;Yoon, Kap-Soo;Hong, Pil-Soon;Jeong, Chang-Oh;Lee, Woo-Geun;Song, Jin-Ho;Kim, Shi-Yul;Kim, Sang-Soo;Son, Kyoung-Seok;Kim, Tae-Sang;Kwon, Jang-Yeon;Lee, Sang-Yoon
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.1203-1207
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    • 2008
  • For a large sized, ultra definition (UD) and high refresh rate for motion blur free AMLCD TVs, amorphous IGZO thin film transistor (TFT) are applied and investigated in terms of threshold voltage ($V_{th}$) shift influenced by active layer thickness uniformity, source drain etching technology, heat treatment and passivation condition. Optimizing above parameters, we fabricated the world's largest 15 inch XGA AMLCD successfully.

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A Study of Efficient LCD Brightness Control Technique in the Mobile Embedded System (모바일 제품의 효율적인 LCD 밝기 조절 기법에 관한 연구)

  • Kim, Jong-Dae;Kim, Young-Kil
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.14 no.1
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    • pp.129-137
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    • 2010
  • There are a lot of multimedia functions getting included in mobile devices recently, not only simple audio but visual functions as well, such as video playing, game and web browsing. Such the visual multimedia functions brought the strong requirement for much bigger LCD Display and high resolution. And the brightness of LCD is also one of major requirements and it is required to be more bright. However, LCD brightness is limited to increase because of power consumption. It occupies nearly 30% of the whole system power. This thesis suggests an effective and simple method of adjusting the LCD backlight brightness, considering a characteristic of battery and user pattern.

A Study on the Efficient Technique of LCD Brightness Control in the Mobile System (모바일 제품의 효율적인 LCD 밝기 조절 기법에 관한 연구)

  • Kim, JongDae;Park, YoungJoon;Kim, YoungKil
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.451-454
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    • 2009
  • There are a lot of multimedia functions getting included in mobile devices recently, not only simple audio but visual functions as well, such as video playing, game and web browsing. Such the visual multimedia functions brought the strong requirement for much bigger LCD Display and high resolution. And the brightness of LCD is also one of major requirements and it is required to be more bright However, LCD brightness is limited to increase because of power consumption. It occupies nearly 30% of the whole system power. This thesis suggests an effective and simple method of adjusting the LCD backlight brightness, considering a characteristic of battery and user pattern.

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Detection of TFT-LCD Defects Using Independent Component Analysis (독립성분분석을 이용한 TFT-LCD불량의 검출)

  • Park, No-Kap;Lee, Won-Hee;Yoo, Suk-In
    • Journal of KIISE:Software and Applications
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    • v.34 no.5
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    • pp.447-454
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    • 2007
  • TFT-LCD(Thin Film transistor liquid crystal display) has become actively used front panel display technology with increasing market. Intrinsically there is region of non uniformity with low contrast that to human eye is perceived as defect. As the gray level difference between the defect and the background is hardly distinguishable, conventional thresholding and edge detection techniques cannot be applied to detect the defect. Between the patterned and un-patterned LCD defects, this paper deals with un-patterned LCD defects by using independent component analysis, adaptive thresholding and skewness. Our method showed strong results even on noised LCD images and worked successfully on the manufacturing line.