Abstract: A method and apparatus facilitates the alignment and light sensitivity adjustment of an optical computer input system, which includes a user generated light directed onto a screen bearing a computer generated image, to convey information to the computer interactively by the user, even in a darkened room. The system discriminates between the user generated image, and the computer generated image. Devices facilitate the proper alignment of the system with the screen, as well as proper light sensitivity adjustments.

Abstract: A liquid crystal display panel construction includes a matrix of liquid crystal elements and a layer of optical fluid extending substantially in a plane parallel to the matrix of liquid crystal elements, for improving the optical characteristics of the panel.

Abstract: The display system includes a liquid crystal display panel unit having three different color components for each pixel of the resulting display. Each one of the individual color components of a pixel of the liquid crystal display panel unit is activated selectively by a corresponding one of a set of video processing units. Each video processing unit is responsive to a video signal from a conventional computer processor for causing the reproduction of a component of a colored image. Each video processing unit includes a translating arrangement for converting a component part of the computer generated video signal into a binary digital signal indicative of a single one of the color components for mixing with other color components to reproduce faithfully the computer generated color image.

Abstract: A method of making a LCD panel system including selecting a pair of substrate panels, forming a peripheral seal on one of the flat surfaces of one of the panels to define an area on the panel surface, distributing compressible optical spheres over the area, aligning one substrate panel with the first and placing the second panel against the seal, in an aligned condition with the other to form a chamber. The panels are pressed together to form a fluid tight seal between the panels. Air is then evacuated from the chamber and an optical fluid is introduced into the chamber.

Abstract: An image is projected in gray scale on a large screen without any flicker, the different colors or shades being indicated on the screen by individual shades of gray. The image is defined by a plurality of pixels which are raster scanned. At each pixel position, a plurality of first digital signals are generated each representing an individual primary color (e.g. red, green and blue) or shade in the image at the position. Second digital signals individually representing such different colors or shades are also produced on a pseudo-random basis -e.g. by producing video clocked signals not only at the pixel positions but also during the horizontal and vertical retraces. The second signals are repetitively counted to a particular value to correspond to successive frames in the video image. In each successive frame, the first signals are compared in value with the second signals at each individual pixel position.