• Title/Summary/Keyword: Flat-panel displays

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TECHNOLOGIES FOR REDUCING POWER CONSUMPTION OF PDPS IN PIONEER

  • Uchidoi, Masataka
    • 한국정보디스플레이학회:학술대회논문집
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    • 2004.08a
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    • pp.159-163
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    • 2004
  • We have introduced fourth generation PDPs last year. The performance of these PDPs is the highest level among TV displays. At the same time the power consumption of them has reached to the lowest level among FPDs (Flat Panel Displays). High panel luminous efficacy and low address power are necessary for the reduction of total power consumption. Following technologies have been developed and applied to the fourth generation PDPs. High panel luminous efficacy: T-shape electrode, waffle rib structure, high Xe content gas Low address power; CLEAR driving method, etc.

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Pseudo 480-Hz Driving Method for Digital Mode Grayscale Displays

  • Ryeom, Jeongduk
    • Journal of Electrical Engineering and Technology
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    • v.8 no.6
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    • pp.1462-1467
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    • 2013
  • A pseudo 480-Hz drive method has been proposed to reduce the dynamic false contour noise that occurs on flat panel displays with displaying grayscale image in the digital mode, such as plasma display panels. The proposed method makes the image movements nearly continuous by rearranging the 8-bit image data displayed for 1 TV field into 8 subfields. The position of the image data rearranged in subfields has been optimized on the basis of the speed of the moving image by computer simulations for the dynamic false contour noise. It is verified that a significant reduction in the dynamic false contour noise is achieved with the proposed method as compared to the conventional noise reduction technologies. Moreover, to reduce the noise in digital mode displays, the proposed technology requires only 8 subfields. Therefore, there is no reduction in the brightness of the image.

Development of IGZO TFTs and Their Applications to Next-Generation Flat-Panel Displays

  • Hsieh, Hsing-Hung;Lu, Hsiung-Hsing;Ting, Hung-Che;Chuang, Ching-Sang;Chen, Chia-Yu;Lin, Yusin
    • Journal of Information Display
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    • v.11 no.4
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    • pp.160-164
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    • 2010
  • Organic light-emitting devices (OLEDs) have shown superior characteristics and are expected to dominate the nextgeneration flat-panel displays. Active-matrix organic light-emitting diode (AMOLED) displays, however, have stringent demands on the performance of the backplane. In this paper, the development of thin-film transistors (TFTs) based on indium gallium zinc oxide (IGZO) on both Gen 1 and 6 glasses, and their decent characteristics, which meet the AMOLED requirements, are shown. Further, several display prototypes (e.g., 2.4" AMOLED, 2.4" transparent AMOLED, and 32" AMLCD) using IGZO TFTs are demonstrated to confirm that they can indeed be strong candidates for the next-generation TFT technology not only of AMOLED but also of AMLCD (active-matrix liquid crystal display).

Laser Microfabrications for Next-Generation Flat Panel Display (레이저를 이용한 차세대 평판 디스플레이 공정)

  • Kim, Kwang-Ryul
    • Korean Journal of Materials Research
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    • v.17 no.7
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    • pp.352-357
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    • 2007
  • Since a pattern defects "repair" system using a diode pumped solid state laser for Flat Panel Display (FPD) was suggested, a lot of laser systems have been explored and developed for mass-production microfabrication process. A maskless lithography system using 405 nm violet laser and Digital Micromirror Device (DMD) has been developed for PDP and Liquid Crystal Display (LCD) Thin Film Transistor (TFT) photolithography process. In addition, a "Laser Direct Patterning" system for Indium Tin Oxide (ITO) for Plasma Display Panel(PDP) has been evaluated one of the best successful examples for laser application system which is applied for mass-production lines. The "heat" and "solvent" free laser microfabrications process will be widely used because the next-generation flat panel displays, Flexible Display and Organic Light Emitting Diode (OLED) should use plastic substrates and organic materials which are very difficult to process using traditional fabrication methods.

Frequency Domain Pre-Processing for Automatic Defect Inspection of TFT-LCD Panels (TFT-LCD 패널의 자동 결함 검출을 위한 주파수영역 전처리)

  • Nam, Hyun-Do;Nam, Seung-Uk
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.57 no.7
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    • pp.1295-1297
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    • 2008
  • Large-sized flat-panel displays are widely used for PC monitors and TV displays. In this paper, frequency domain pre-filter algorithms are presented for detection of defects in large-sized Thin Film Transistor-Liquid Crystal Display(TFT-LCD) panel surfaces. Frequency analysis with 1-D, 2-D FFT methods for extract the periodic patterns of lattice structures in TFT-LCD is performed. To remove this patterns, frequency domain band-stop filters were used for eliminating specific frequency components. In order to acquire only defected images, 2-D inverse FFT methods to inverse transform of frequency domain images were used.

CRT competitive strategies towards flat panel displays

  • Sluyterman, A.A.S.
    • 한국정보디스플레이학회:학술대회논문집
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    • 2003.07a
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    • pp.137-141
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    • 2003
  • CRTs can survive in the long run for TV applications, because of their realistic reproduction of live images. CRT technology development has to be directed towards form factor, but also attention has to be paid to the form design of sets. The CRT is the only technology allowing a doubly curved screen surface.

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CRT Competitive Strategies Towards Flat Panel Displays

  • Sluyterman, A.A.S.
    • Journal of Information Display
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    • v.4 no.1
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    • pp.38-42
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    • 2003
  • CRTs can survive in the long run for TV applications, because of their realistic reproduction of live images. CRT technology development has to be directed towards form factor, but also attention has to be paid to the form design of sets. The CRT is the only technology allowing a doubly curved screen surface.

Disassembly and Compositional Analysis of Waste LCD Displays (폐(廢) 디스플레이의 해체(解體) 및 성분조사(成分調査))

  • Lee, Sungkyu;Kang, Leeseung;Lee, Chan Gi;Hong, Myung Hwan;Cho, Sung-Su;Hong, Hyun Seon
    • Resources Recycling
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    • v.22 no.2
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    • pp.29-36
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    • 2013
  • Although Korean domestic production of flat panel displays totalled more than 48 trillion KRW in 2007, most of the flat panel display wastes have been land-filled or incinerated, which greatly overshadows Korean national prestige as a world leading producer and developer of flat panel display devices. Countries such as Japan or EU possess quite limited land-fill capability and have sought ways to dispose of WEEEs from environment-friendly perspective rather than recovery of valuable materials from the wastes. Considering relatively short cycle of about 5 years for flat panel display devices, it is estimated that more than 5 million units will be accumulated as wastes by 2015. Urban mining is a most suitable countermeasures against China's monopoly of rare and rare earth metals, which are contained in flat panel display wastes. Therefore, materials recycling of waste LCD units has to be developed and commercialized soon enough for economic and environment-friendly recovery of valuable resources hidden in LCD wastes.

Transparent Conducting Ga-doped ZnO Thin Film for Flat-Panel Displays with a Sol-gel Spin Coating

  • Nam, Gil-Mo;Kwon, Myoung-Seok
    • Journal of Information Display
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    • v.9 no.3
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    • pp.8-11
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    • 2008
  • A novel non-alkoxide sol-gel process for synthesizing Ga-doped ZnO thin film on glass was derived for possible use as a transparent electrode in flat-panel displays, using zinc acetate dehydrate as the starting material. The structural and electrical properties of thin films have been characterized as functions of Ga addition and post-heat-treatments. Their carrier density, Hall mobility, and optical transmittance were measured and discussed herein to explain the characteristics of the sol-gel-derived Ga-doped ZnO thin film on glass.