Susumu Tanase

8.2: Color Tuning Projection System for Adaptive Combination of High Brightness and Wide Color Gamut

We have developed a new projector with a fourth liquid crystal panel that controls yellow light separately from RGB lights of UHP lamp. This additional panel system enables projector to achieve adaptive control of both high brightness and 120% wide color gamut. In this paper, we propose the innovative design concept and the technical development of the Color Tuning Projection System and represent the characteristics of the prototype.

Color‐tuning projection system for adaptive combination of high brightness and wide color gamut

— The demand for projectors with high brightness and wide color gamut has been increasing; however, UHP lamp projectors cannot deliver those two qualities efficiently and simultaneously because of its color-separation system. The newly developed projection system — “Color-Tuning Projection System” — realizes the adaptive combination of high brightness and wide color gamut with one projector. This projector features a fourth liquid-crystal panel — “Color Tuner” — with a 3LCD optical engine, which controls yellow light separately from the RGB light of a UHP lamp. This color-tuner-based optical engine — “Color-Tuning Optical Engine” — and a new color-conversion signal-processing algorithm — “Adaptive Color Conversion Algorithm” — controls the yellow-light volume and corrects color-shifted pixels according to the brightness and chromaticity analysis of the input image, key technologies of the Color-Tuning Projection System. This additional panel system enables the projector to ach ieve up to 115% higher brightness and 120% wider color gamut according to the input image. This paper presents an innovative design concept, a novel technology regarding brightness and a color-gamut conversion projection system, and the characteristics of the prototype.

Adaptive color conversion algorithm to achieve both high brightness and wide color gamut

We present a new color conversion algorithm for the new projector with the forth liquid crystal panel which controls the yellow light separately from RGB lights of the three-LCD system. This algorithm controls the volume of yellow light and corrects distorted color based on image analysis, and thus achieves high brightness and wide color gamut.