发明授权
- 专利标题： Gradation correction method and device
- 专利标题（中）： 梯度校正方法和装置
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申请号： US366028申请日： 1994-12-29
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公开(公告)号： US5661575A公开(公告)日： 1997-08-26
- 发明人: Haruo Yamashita , Hideshi Ishihara , Yasuki Matsumoto
- 申请人： Haruo Yamashita , Hideshi Ishihara , Yasuki Matsumoto
- 申请人地址： JPX
- 专利权人： Matsushita Electric Industrial Co., Ltd.
- 当前专利权人： Matsushita Electric Industrial Co., Ltd.
- 当前专利权人地址： JPX
- 优先权： JPX2-271119 19901009
- 主分类号： G03F3/00
- IPC分类号： G03F3/00 ; H04N1/40 ; H04N1/407 ; H04N1/46 ; H04N1/48 ; H04N9/64 ; H04N9/69 ; H04N5/202
摘要：
The gradation correction device includes a luminance signal convertor to generate a luminance signal from the input R, G, B signals, a correction coefficient calculator which calculates the ratio to the luminance signal of the luminance signal after gamma correction to the predetermined gradation characteristics, and a multipliers to multiply the output from the correction coefficient calculator by each of the R, G, and B input signals. When the gradation correction is applied, effective brightness adjustment can be applied with no change in hue and saturation and without exceeding the dynamic range of a device.
公开/授权文献
- USD328502S Garden lighting fixture 公开/授权日：1992-08-04
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