Abstract: Triple-buffering video memory in a computer graphics controller improves the quality of full-motion video converted for display on a computer monitor. Buffer size, organization, and access cycles prevent converted data representing a new video frame from overwriting a buffer in memory that contains converted data representing a video frame currently being displayed. The access cycles also ensure all data representing a video frame is displayed. The video memory is partitioned into three logical buffers to hold the converted data, the buffers are arranged in a logical ring sequence for read and write access, and the data in a buffer is repeatedly read until the next buffer in the sequence is full of data and ready to be read. In addition, the buffering is adaptable to different resolutions as the size of the buffers is determined by the value of the resolution each time the video conversion is initiated.

Abstract: A method and system for producing a finely textured display image of a gradation of high color resolution color shading. The high color resolution system is adapted to be coupled to a relatively inexpensive high speed active matrix display panel employing single-bit LCD drivers and a plurality of sub-pixel elements. The system includes a sub-pixel activation circuit for generating single-bit digital signals for driving individual ones of the sub-pixel elements. A duty cycle circuit arrangement controls the sub-pixel activation circuit to cause desired ones of the sub-pixel elements to be activated selectively an average number of times over a large number of consecutive frame time intervals to generate sub-pixel images having desired perceived color shading levels.

Abstract: A new display panel system includes a stacked display panel and drive units therefor. The drive units include a computer for adjusting for the individual gamma characterics of each one of the display panels for color balancing purposes and for causing the luminance of each panel to be maximized, or at least greatly increased for each intensity level or shading of each color.

Abstract: A multiple color display system employing a low speed active matrix panel and a color enhancing unit for defining composite pixel groupings in the active matrix panel and for causing each grouping to produce in excess of 24 thousand different color shading levels.

Abstract: A new display panel system includes a stacked display panel and drive units therefor. The drive units include a computer for adjusting for the individual gamma characterics of each one of the display panels for color balancing purposes and for causing the luminance of each panel to be maximized, or at least greatly increased for each intensity level or shading of each color.

Abstract: A multiple color display system employing a high speed display panel adapted for positioning on a conventional photographic projector for displaying large video images. The high speed display panel is coupled to an interface unit for converting conventional NTSC signals into analog signals for driving a controller employing a modulation or duty cycle circuit coupled between the high speed display panel and a memory which is drive by the interface unit. The controller also employs a scan modulator for formatting the NTSC signal so that it may be displayed on a 640 by 480 matrix array employed by the high speed display device.

Abstract: A multiple color display system employing a display device having a plurality of pixel elements each having a set of three subpixel components and a interfacing unit to couple a television signal to the active matrix panel. The interfacing includes a color enhancing unit for defining composite pixel groupings in the active matrix panel and for causing each grouping to produce in excess of 185 thousand different color shading levels.

Abstract: A high speed color display system including a modulation circuit electrically coupled between a high speed display device, such as an active matrix liquid crystal display panel, and a video output signal source, such as a video output card of a personal computer. The modulation circuit including both a scaling circuit for eliminating or substantially reducing contouring caused by quantizing errors associated with approximations of digital pictures and a duty cycle scaling circuit for eliminating or substantially reducing repetitive beats in a displayed image.

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.