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Color correction system for projection video system utilizing multiple light sources

机译:利用多个光源的投影视频系统的色彩校正系统

摘要

A color correction system for a video projection system utilizing a single light valve for modulating light impinging thereon with a video signal and three projection lamps, one for each of the primary colors, which are activated sequentially. Positioned in the light path between two of the lamps and the light valve are occluders which block and unblock the light output from their associated lamp. The lamps which have the occluders are operated such that each lamp may be driven with a series of non-occluded pulses and occluded pulses. The occluded pulses occur when the occluder blocks the light output from the lamp. The more a desired reduction in light output in one of the colors is required, the non-occluded pulses are reduced and the corresponding occluded pulses are increased. This permits adjustment of the colorimetry of the system without adversely affecting the electrical properties of the lamp. As such, the electrical power input to each of the lamps remains within operational parameters but the light output of a particular color as seen by the light valve, and thus the viewer, may be reduced.
机译:一种用于视频投影系统的色彩校正系统,该系统利用单个光阀来调制入射有视频信号的光,并依次激活三个投影灯,每个原色各一个,三个投影灯。阻塞器位于两个灯和光阀之间的光路中,该阻塞器阻挡和解除阻挡从其相关的灯输出的光。操作具有阻塞器的灯,使得可以用一系列非阻塞脉冲和阻塞脉冲来驱动每个灯。当封堵器挡住从灯输出的光时,发生封堵脉冲。要求更多地减少一种颜色的光输出的期望量,减少非阻塞脉冲,并增加相应的阻塞脉冲。这允许调节系统的色度,而不会不利地影响灯的电性能。这样,输入到每个灯的电功率保持在操作参数内,但是可以减少光阀所看到的特定颜色的光输出,从而可以减少观看者的视线。

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