发明授权
US06943848B2 Unit for and method of video signal enhancement and image display apparatus provided with such a video signal enhancement unit
失效
视频信号增强单元和方法以及配备有这种视频信号增强单元的图像显示装置
- 专利标题： Unit for and method of video signal enhancement and image display apparatus provided with such a video signal enhancement unit
- 专利标题（中）： 视频信号增强单元和方法以及配备有这种视频信号增强单元的图像显示装置
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申请号： US10086880申请日： 2002-03-01
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公开(公告)号： US06943848B2公开(公告)日： 2005-09-13
- 发明人: Eric Peter Funke
- 申请人： Eric Peter Funke
- 申请人地址： NL Eindhoven
- 专利权人： Koninklijke Philips Electronics N.V.
- 当前专利权人： Koninklijke Philips Electronics N.V.
- 当前专利权人地址： NL Eindhoven
- 优先权： EP01200840 20010306
- 主分类号： H04N5/57
- IPC分类号： H04N5/57 ; H04N5/20 ; H04N5/52
摘要：
A video signal enhancement unit (100) and an image display apparatus containing the unit have a processing unit (102) for contrast modification of the video signal. The processing unit (102) receives input data from a contrast counter (112), designed to store a contrast count. The contrast count is decreased by a pixel counter (104) each time the total number of pixels which have video signal levels that are higher than a predetermined video level, exceeds a predefined threshold. The contrast count is increased each time a trigger means (114) generates a pulse. A contrast comparator (116) can be coupled to the contrast counter (112) to limit the contrast count to a maximum contrast value.
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