Michael Francis Higgins

13.3 Co‐Optimization of Color AMLCD Subpixel Architecture and Rendering Algorithms

Color subpixel rendering is enhanced by co-optimizing the color subpixel architecture and algorithms with respect to human vision, resulting in the PenTile Matrix™ subpixel architecture to double the addressability and the MTF limit in both horizontal and vertical axes while reducing driver count. Results of prototype AMLCD panels demonstrate improved text and full color image quality.

72.1: Invited Paper: PenTile RGBW® Color Processing

The conversion of tri-vectored color values to quad-vectors creates a degree of freedom that may be used to optimize color reproduction and image reconstruction. Global selection from among possible RGBW metamers improves image texture. Local selection from among possible metamers improves subpixel rendering. Combining RGBW with Dynamic Back Light Control eliminates Out-of-Gamut colors while still maintaining power reduction benefits of RGBW. Local mapping vs. global mapping of Out-of-Gamut colors improves brightness without sacrificing local luminance contrast for more aggressive power savings modes.