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1. 发明授权

US6061102A Automatic shading in an LCLV projector 失效
标题翻译： LCLV投影机中的自动阴影
公开(公告)号：US6061102A
公开(公告)日：2000-05-09
申请号：US949105
申请日：1997-10-10
申请人： John P. Sheppard , Rodney D. Sterling , Graeme D. Gow , John J. Lyon
发明人： John P. Sheppard , Rodney D. Sterling , Graeme D. Gow , John J. Lyon
IPC分类号： H04N5/20 , H04N5/74 , H04N17/00 , H04N3/223 , H04N9/28
CPC分类号： H04N5/20 , H04N9/3185 , H04N9/3194
摘要： A process for implementing shading corrections in a video projector. The process selects a color to be shaded, and then sets a projector video level at a selected high video level. A target brightness map is then generated for each of a plurality of preselected shading correction application points at the selected high video level. The process sets the projector video level at a selected low video level, and generates a target brightness map for each of the plurality of shading correction application points at the low video level. Actual light levels are then measured at both the high and low video levels for each shading correction application point, and differences between the target and measured brightness values are minimized. The shading process of the present invention is automatically preformed during projector set-up, and thereby eliminates the inherent subjective and time consuming need for conventional manual shading processes.
摘要翻译：用于在视频投影仪中实现阴影校正的过程。该过程选择要被阴影的颜色，然后在选定的高视频级别设置投影机视频级别。然后，在所选择的高视频电平上为多个预选阴影校正应用点中的每一个生成目标亮度图。该处理将投影仪视频电平设置在选定的低视频电平，并且在低视频电平下为多个阴影校正应用点中的每一个生成目标亮度图。然后在每个阴影校正应用点的高和低视频电平上测量实际光强度，并且目标和测量的亮度值之间的差异被最小化。本发明的遮光过程在投影机设置期间自动进行，从而消除了传统的手动遮蔽过程固有的主观和耗时的需要。

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