Back to articles
Articles
Volume: 14 | Article ID: art00028
Image
Enhancing Angular-Dependent Color Performance of TFT-LCDs by Transmittance Scaling
  DOI :  10.2352/CIC.2006.14.1.art00028  Published OnlineJanuary 2006
Abstract

This paper presents an algorithm for minimizing color shift of a liquid crystal display (LCD). In a normally white, twisted nematic-type LCD, the angular-dependent color shift is inversely proportional to its panel transmittance. By increasing the panel transmittance and decreasing the backlight intensity simultaneously, we can reduce the angular-dependent color shift and power consumption at the same time. In this study, first, we characterized the angular-dependent luminance reduction and color shift of a 19″ TFT-LCD. Second, we conducted experiments to characterize the human factors of viewing angle variation. Since dynamic range also decreases as the viewing direction increases, tone re-mapping is required. We conducted psychophysical experiments to study the interaction between perceived contrast and brightness of pictorial images. Based on the experimental results, we proposed an algorithm that scales the transmittance of red, green, and blue channels independently subject to image distortion constraints. We implemented the proposed algorithm by prototyping an RGB LED-backlit LCD monitor and driving modules to demonstrate the concept.

Subject Areas :
Views 6
Downloads 0
 articleview.views 6
 articleview.downloads 0
  Cite this article 

Wei-Chung Cheng, "Enhancing Angular-Dependent Color Performance of TFT-LCDs by Transmittance Scalingin Proc. IS&T 14th Color and Imaging Conf.,  2006,  pp 153 - 158,  https://doi.org/10.2352/CIC.2006.14.1.art00028

 Copy citation
  Copyright statement 
Copyright © Society for Imaging Science and Technology 2006
72010350
Color and Imaging Conference
color imaging conf
2166-9635
Society of Imaging Science and Technology
7003 Kilworth Lane, Springfield, VA 22151, USA