전자공학회논문지 IE

The Institute of Electronics and Information Engineers (대한전자공학회)
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Design of White Balance Correction Processor for High Resolution Full Color LED Display System

고해상도 천연색 LED 디스플레이 시스템을 위한 흰색 보정프로세서의 설계

  • Lee, Jong-Ha (Dept. of Information & Digital Electronic Engineering, Vision University of Jeon-Ju) ;
  • Ko, Duck-Young (Dept. of Information & Digital Electronic Engineering, Vision University of Jeon-Ju)
  • 이종하 (전주비전대학 디지털전자정보과) ;
  • 고덕영 (전주비전대학 디지털전자정보과)
  • Published : 2009.09.25
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Abstract

In this paper, we developed white balance correction processor for Full Color LED Display System which could be display uniformity color and soft light by adjusting brightness of red, green, blue pixel, individually. This processor correct brightness by calculating operating current of each pixel(red, green, blue LED) on the basis of characteristic curve of LED device when we named "a" as a specific characteristic value, "b" as a brightness correction value according to using time, "X" as a operating current value, and "Y" as brightness value. As the results, we solved the reduction problem of brightness for long used LED devices, according to increase entire mean of brightness value by adjusting "b" value from the brightness characteristic function.

본 논문은 LED 디스플레이 시스템에서 균일하고 부드러운 영상표출을 위하여 각각의 Red, Green, Blue LED의 휘도를 조절하여 흰색보정을 유지할 수 있는 프로세서를 설계하였다. 이 프로세서는 일반적인 LED소자의 특성곡선을 근거로 "a"를 고유특성 값, "b"를 사용시간에 따른 휘도보정 값, "X"를 구동전류 값, "Y"를 휘도 값이라 할 때, "Y=aX+b"로 설정되는 휘도 특성함수에 의하여 각 픽셀의 휘도에 따른 구동 전류 값을 산출하여 휘도를 보정하고, 또한 장시간 사용 시 LED소자의 휘도 저하 문제를 해결하기 위하여 "b"값을 조절하여 LED 디스플레이 시스템의 전체 평균 휘도 값을 상향시킬 수 있도록 구현하였다.

Keywords

References

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