An Image Processing Method for a New Type of LCD Projector with Separately Processed Chrominance and Luminance

We have developed a bright LCD projector based on a new concept using three chrominance panels and one luminance panel. These panels are driven by a newly devised control circuit which generates a wide-band frequency luminance signal for the luminance panel and narrow-band frequency chrominance signals for the three chrominance panels. This is based on the characteristic of human vision in which the spatial resolution for chrominance is low compared with luminance. This paper explains the mechanisms of the distribution of the light energy for the luminance panel and the chrominance panels by using two models. One is the distribution model of the light for the same resolution of panels. The other is the digital filter model using the difference of resolutions between the luminance panel and the three chrominance panels. The results show that the original images are precisely displayed by first model. On the other hand, results of the second model show that the filter is effective for the representation of the original images, and would yield sufficient picture quality on our developed LCD projector based on this concept.