P‐38: Driving Scheme for Improving Color Performance of LCD's: Accurate Color Capture

Abstract

This paper describes a novel driving scheme, ACC Accurate Color Capture, for improving color accuracy of LCD's. ACC changes RGB gamma curves separately to reduce the color shift with respect to the gray level. ACC dramatically reduced correlated color temperature shift from 3300K to 75K through 255‐64 gray range with 2.4 gray gamma value. As experimental results, ACC is little affected by gamma value variation of 2.0–2.8.

P‐128: Improved Picture Quality on Analog Dual‐Data Type Multi‐Domain Polymer Sustained Alignment LCD Technology

“…Figure 1 shows the operation diagram of the analog T-T type pixel. The input gray level (R, G, B) would enter one RGB LUT, which minimizes the on-axis white-color shift vs. gray level [10]. Then, the output gray level (R', G', B') of the RGB LUT would be the common input signal for the two individual sets of R-string networks (for main-regions and subregions, respectively), which determines output voltages, Vmain and Vsub, as a function of the gray level.…”

16.3: Enhanced Oblique Viewing Angle Color Performance for S‐PVA Panels

“…This kind of problem can appear especially on multi-domain structures designed for wide viewing angle performance, and the yellowing artifact is investigated by means of experiments that follow. Figure 2 shows the result of applying ACC (Accurate Color Capture) [5] correction technology on a 2G-1D multi-domain structure. With ACC, the input red, green and blue gray data is adjusted to correct for the wavelength-dependent dispersion of liquid crystals to achieve white balance over all gray levels onaxis.…”

P‐52: Evaluation of LCD Optical Performances with Motion Blur Reduction and Color Improvement Technologies

“…In addition, with the introduction of DID, digital gamma correction [6] needs to be re-examined for its effectiveness, since the LC response is now impulsive, and the color performance may be different. Overdrive, DID, and DGC hardware were developed, and their optical performances that are core to a high quality TFT-LCD, are compared.…”

“…However, due to slow response time of liquid crystal displays, we have found that overdrive is necessary for good motion picture performance of DID, and in extreme cases, DID without overdrive has worse motion picture performance than normal hold-type displays without overdrive. In addition, with the introduction of DID, digital gamma correction [6] needs to be re-examined for its effectiveness, since the LC response is now impulsive, and the color performance may be different. Overdrive, DID, and DGC hardware were developed, and their optical performances that are core to a high quality TFT-LCD, are compared.…”