专利名称：High efficiency light valve projection system
with decreased perception of spacesbetween pixels and/or hines
发明人：Eugene Dolgoff申请号：US07/659596申请日：19910221公开号：US05300942A公开日：19940405
摘要：A light valve such as an active matrix LCD between crossed polarizers, utilizing,for instance, individual transistors to control each \"pixel area\" of the LCD and storageelements to store video signal data for each pixel, with optically shielded \"dead spaces\"between pixels to eliminate electric field crosstalk and non-information-bearing lightbleed through, is illuminated with a bright independent light source which creates a videoimage projected via specialized projection optics onto an internal or external screenwithout distortions, regardless of the angle of projection onto the screen. Use of heatsinks, IR reflective coatings, heat absorbing optics, optional fluid and a thermistorcontrolled pixel transistor bias voltage injection servo circuit stabilizes imageperformance, maintaining accurate color and contrast levels as the LCD changestemperature. In one embodiment of the invention, use of a multi- color LCD with astepped cavity, producing different thicknesses of LCD for the different wavelengths thatpass through it, allows a linear correspondence between the wavelengths passingthrough the LCD to produce true black, high contrast and CRT-like color rendition. Adichroic mirror arrangement is used to overlap differently colored pixels in the projected
image. Use of lens arrays to expand pixels, where necessary, eliminating spaces betweenpixels, creating a continuous image with no apparent stripes or dots. A special venetian-blind type of screen is also disclosed and methods for using the system to view three-dimensional video are also explained.
申请人：PROJECTAVISION INCORPORATED
代理机构：Anderson Kill Olick & Oshinsky
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