Quantitative Analysis of Phosphors Decay Characteristic for Flicker-free Display System Design

플리커 저감 디스플레이 시스템 설계를 위한 인광체 잔광 특성의 정량적 해석

  • Kwon, Yong-Dae (Dept. of Electronics Engineering Kyungpook University) ;
  • Choi, Duk-Kyu (Dept. of Electronics Engineering Kyungwoon University) ;
  • Han, Chan-Ho (Dept. of Electronics Engineering Kyungwoon University) ;
  • Lee, Gwang-Soon (Dept. of Electronics Engineering Kyungpook University) ;
  • Kim, Eun-Su (Dept. of Electronics Engineering Kyungpook University) ;
  • Lee, Sang-Hoon (Dept. of Electronics Engineering Kyungpook University) ;
  • Sohng, Kyu-Ik (Dept. of Electronics Engineering Kyungpook University)
  • Published : 2000.11.25

Abstract

The perception of flicker on the computer display devices depends upon the temporal waveform of the phosphor decay characteristic, the frame rate, and the display size. The lowest frequency at which flicker is not perceived is called the critical fusion frequency or critical frequency. Critical fusion frequency is evaluated by the display illuminance and the modulation (m) defined as the ratio of the amplitude of first harmonic frequency to the DC of the waveform. In this paper, we analyze the relationship bet ween the critical fusion frequency, relating to the decay characteristic of the phosphors and luminance on the monitor, and the frame frequency. Also under considering the viewing angle, we presented the frame frequency that is less sensitive to the full size of the display device.

최근 컴퓨터의 급속한 보급에 따라 고밀도 CRT(cathode ray tube)가 요망되고 있다. 이를 위하여 신호 대역과 주사 속도의 증가에 따른 주사선 수를 증가 시켜야 하고 플리커(flicker)도 줄여야 한다. 플리커 현상은 PC작업을 장시간 하는 경우 더욱 심하게 느껴지므로 플리커 현상을 줄이는 연구가 필요하다. 본 논문에서는 플리커가 덜 느껴지도록 하는 디스플레이 시스템의 설계를 위한 기초 연구로서 CRY에 사용된 인광체의 잔광 특성 및 화면의 밝기에 따른 플리커와 프레임 주파수와의 관계를 정량적으로 해석하였으며, 또한 디스플레이 전화면에 대해서 시각을 고려하여 플리커를 덜 느끼도록 하는 프레임 주파수를 제시하였다.

Keywords

References

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