Transactions on Electrical and Electronic Materials

  • 제8권4호
  • /
  • Pages.166-169
  • /
  • 2007
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  • 1229-7607(pISSN)
  • /
  • 2092-7592(eISSN)
한국전기전자재료학회 (The Korean Institute of Electrical and Electronic Material Engineers)
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Characteristics of Motion-blur Free TFT-LCD using Short Persistent CCFL in Blinking Backlight Driving

  • Han, Jeong-Min (Department of Electrical & Electronic Engineering, College of Engineering, Yonsei University) ;
  • Ok, Chul-Ho (Department of Electrical & Electronic Engineering, College of Engineering, Yonsei University) ;
  • Hwang, Jeoung-Yeon (Department of Electrical & Electronic Engineering, College of Engineering, Yonsei University) ;
  • Seo, Dae-Shik (Department of Electrical & Electronic Engineering, College of Engineering, Yonsei University)
  • 발행 : 2007.08.31
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초록

In applying LCD to TV application, one of the most significant factors to be improved is image sticking on the moving picture. LCD is different from CRT in the sense that it's continuous passive device, which holds images in entire frame period, while impulse type device generate image in very short time. To reduce image sticking problem related to hold type display mode, we made an experiment to drive TN-LCD like CRT. We made articulate images by turn on-off backlight, and we realized the ratio of Back Light on-off time by counting between on time and off time for video signal input during 1 frame (16.7 ms). Conventional CCFL (cold cathode fluorescent lamp) cannot follow fast on-off speed, so we evaluated new fluorescent substances of light source to improve residual light characteristic of CCFL. We realized articulate image generation similar to CRT by CCFL blinking drive and TN-LCD overdriving. As a result, reduced image sticking phenomenon was validated by naked eye and response time measurement.

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참고문헌

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