Image에 따른 효과적인 LCD 백라이트 Block 단위 Nonideality 및 Cross-talk Compensation

Efficient Image Specific Block Based LCD Backlight Nonideality and Cross-talk Compensation

  • 투고 : 2010.07.30
  • 심사 : 2011.06.15
  • 발행 : 2011.07.25

초록

Backlight Profile과 Image Pixel의 Homogeneity 분석을 통한 Block 단위 LCD Backlight Nonideality 및 Crosstalk Compensation 방안이 제안되었다. Image에 따라 Block Size 및 연산에서 제외되는 Block 범위 그리고 연산에 고려되는 Backlight 범위를 최적화하여, 화질을 유지하면서 연산량을 최소화시켰다. 실제 영상을 바탕으로 하는 Simulation을 통해 제안된 Compensation 연산량과 화질이 평가되었다.

Block based LCD backlight nonideality and crosstalk compensation methodologies are proposed based on the analysis of backlight profiles and image pixel homogeneity. Large computation complexity required in the conventional compensations is minimized without the degradation of image qualities by optimizing image block size, image area inside the block to be excluded from the compensation computation and the required backlight range to be computed. The optimization results of computation complexity as well as image qualities are verified for the proposed compensation by real image data simulations.

키워드

참고문헌

  1. Pierre de Greef, Hendriek Groot Hulze, "Adaptive Dimming and Boosting Backlight for LCD-TV Systems", SID 07
  2. Hanfeng Chen, Junho Sung, Taehyeun Ha, Yungjun Park and Changwan Hong, "Backlight Local Dimming Algorithm for High Contrast LCD-TV", SID 06
  3. T. Shirai, S. Shimizukawa, T. Shiga, and S. Mikoshiba, "RGB-LED Backlights for LCD-TVs with 0D, 1D, and 2D Adaptive Dimming", SID 06
  4. WonJin Han, JaeHee You "Low Computation Complexity Block Based Nonideality and Cross-talk Compensations for LCD Backlight", IMID 09
  5. Huajun J. Peng, Wei Zhang, Chun-Kit Hung, Chen-Jung Tsai, Kwan-Wah Ng, Shou-lung Chen, Danding Huang, Yuk-Lung Chueng, and Ying Liu, "High Contrast LCD TV Using Active Dynamic LED Backlight", SID 07