• Title/Summary/Keyword: LCD panel

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Reutilization of waste LCD panel glass as a building material (건축자재로서 폐 LCD 판유리의 재활용)

  • Min, Kyoung-Won;Lee, Hyun-Cheol;Seo, Eui-Young;Lee, Won-Sub
    • Journal of Industrial Technology
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    • v.31 no.A
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    • pp.53-57
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    • 2011
  • Recently due to dramatically increasing demand of liquid crystal display (LCD) panel in IT industry, the used LCD panel glass has been wasted from electronic items, and also panel glass of poor quality during manufacturing process. The wasted LCD panel glass was crushed in the range of 0.42 to 2mm and evaluated for its usefulness as a aggregate in production of cement concrete brick. Cement concrete specimens with various mixing ratios of weathered granite soil, LCD panel glass and cement were cured in wetness for 7 days at $40^{\circ}C$ and then tested for uniaxial comprehensive strength (UCS)(KS F 4004 method). Specimen with a mixing ratio, 1:6:3, of weathered granite, LCD panel glass and cement, respectively, showed the highest average in the UCS test($26.51N/mm^2$). It is much higher than that of commercial brick without glass($17.00N/mm^2$). Conclusively waste LCD panel glass can be reutilized economically as a raw building material of good quality.

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Defect detection for TFT-LCD panel using image processing (영상처리를 이용한 TFT-LCD의 불량 검출)

  • 이규봉;곽동민;최두현;송영철;박길흠
    • Proceedings of the IEEK Conference
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    • pp.1783-1786
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    • 2003
  • In this paper, an automated line-defect detection method for TFT-LCD panel is presented. A DFB(Directional Filter Bank) and line-projection method are used to find line-defect which is one of the major defects occurred in TFT-LCD panel. The experimental results show that the proposed algorithm gave promising results for applying automated inspection technique for TFT-LCD panel.

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Development of a LED BLU Tester Detecting the Errors of LCD Panels (LCD 패널의 불량을 검출하는 검사용 LED BLU 개발)

  • Kouh, Hoon-Joon;Jang, Kyung-Soo;Oh, Ju-Young
    • The Journal of the Korea Contents Association
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    • v.10 no.5
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    • pp.62-69
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    • 2010
  • LCD panel need BLU(Back Light Unit) that is outside source of light because can not emit light voluntarily. BLU is used in LCD module and is used in tester that examine LCD panel's badness. Lately, BLU had changed from CCFL(Cold Cathode Fluorescent Lamp) to LED(Light-Emitting Diode) fast. CCFL need extra-high tension power and produce much heat and is difficult to keep fixed brightness. LED is few electric power wastage and keeps fixed brightness. But, BLU that is used to detector that examine the LCD module is using CCFL until recently. This paper develops LED BLU that can examine LCD panel's badness. Also, this manufactures LED BLU to 24 inch size to examine all LCD panels(12~24 inch), and develops so that LED BLU may operate according to LCD panel's size.

A Study on the Development of the Console with LCD Panel for Exterior Advertizing (LCD 패널을 탑재한 옥외 광고용 콘솔 개발에 관한 연구)

  • Choi, Kab-Yong
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.11 no.1
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    • pp.13-20
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    • 2010
  • The development of the console for exterior advertizing LCD Panel(LCD Console) is the purpose of this study with regard to importance of display industry. In this study, the most important point is to develop the cooling system for LCD Console. It is developed by using systematic application techniques and statistical tests and analysis to integrate commercial components, cooling fan, heat sink, thermo electronic modules etc, of it. This study, at first, shows design/manufacturing process of the cooling system and the setting process of control factors to control through experimentation. Next, after constructing the complete console, 46 inch LCD Panel and the cooling system are built in, the performance test of it is shown through experimentation.

Rubbing Process Evaluation Method for The LCD Panel

  • Honoki, Hideyuki;Sakai, Kaoru;Kawabe, Shun'Ichi;Nakasu, Nobuaki
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.115-117
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    • 2002
  • In order to realize a stable rubbing process for the liquid crystal panel, the authors investigated the quantitative evaluation method of rubbing process uniformity. The proposed method focuses on the relationship between the image quality of the LCD panel for gray scale images and the rubbing uniformity. The proposed method indicates rubbing uniformity using quantitative parameters of spots and hairlines on the LCD panel.

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LCD Photo-mask Using Commercial LCD Panel (상용 LCD 패널을 이용한 광 마스크 제작)

  • Lee, Seung-Ik;Koh, Jeongh-Hyun;Lee, Sang-Young;Park, Jang-Ho;Soh, Dea-Wha
    • Journal of the Speleological Society of Korea
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    • no.77
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    • pp.21-30
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    • 2007
  • Photo-lithography lies in the middle of the wafer fabrication process. It is often considered as the most critical step in the IC process. We use a mask in exposure steps of the photo-lithography. Typically, 20 to 25 different levels of masks are required to complete an IC device. That means, if a photo process can be developed with the use of only one photo mask, we can reduce more process cost. To satisfy this, we plan to develop an alternative photo mask. For this reason, we chose to use a LCD. We expect to develop a LCD panel that can be changed by electrical control. This is the main idea about the adjustive photo mask. The Photo mask made of LCD panel will replace the former one.

Development of Driver IC on TFT-based Liquid Crystal Display

  • Pan, Po-Chuan;Koo, Horng-Show
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.381-384
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    • 2005
  • Driver IC is one of the key components on the LCD monitor and LCD/TV. The function of the driver IC is to transfer and forward the input signals to LCD panel module. Inside driver IC, there are several operating units which process the input signals and generate the appropriate size and resolution to the LCD panel module. LCD panel module will display these input signals. However, there are some difficulties which driver IC designer, LCD monitor and LCD/TV maker will face. Thus, this article addresses the function and difficulties on driver IC.

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Investigation of Wear Behavior of LCD Panel Glass (LCD 패널 유리의 마모거동에 관한 연구)

  • Kwak, Ji Hoo;Shin, Dong Gap;Kim, Dae-Eun
    • Transactions of the Society of Information Storage Systems
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    • v.10 no.2
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    • pp.39-44
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    • 2014
  • LCD panels are used widely in all sorts of devices. Since glass is the main material used to make the panels, scratch resistance is an important issue in acquiring high quality LCD panels. In this work the wear behaviors of three types of commercially available LCD panel glasses were investigated. A pin-on-reciprocating tribotester was used to perform the wear tests using the glass specimens against a stainless steel ball. The hardness of the specimens was initially obtained. It was shown that the wear amount varied with respect to the applied load as well as the type of glass. The wear pattern of the glass specimen was also characterized using confocal microscopy. It is expected that the results of this work will aid in improving the tribological properties of LCD panel glass.

Development of n Remote Monitoring System for TFT-LCD Panel Test Automation (TFT-LCD 채널검사 자동화를 위한 원격 모니터링 시스템 개발)

  • Park, Hyoung-Keun;Lee, Seung-Dae;Kim, Sun-Youb
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.8 no.3
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    • pp.483-487
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    • 2007
  • In this study, we develop a new remote monitoring system for TFT-LCD panel test automation. Having to realtime monitor of Ti-Con board, this system needs to discrimination whether breakdown or not that is able to transmit processing data for engineer at long distance place using TCP/IP. The result of the development, that can be fast opposition to the breakdown and the multiple processing

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