发明授权
US5835161A Kinescope driver apparatus with gamma correction coupled with feedback
cathode current sensor
失效
具有伽马校正的显像管驱动器装置与反馈阴极电流传感器耦合
- 专利标题： Kinescope driver apparatus with gamma correction coupled with feedback cathode current sensor
- 专利标题（中）： 具有伽马校正的显像管驱动器装置与反馈阴极电流传感器耦合
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申请号： US804848申请日： 1997-02-24
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公开(公告)号： US5835161A公开(公告)日： 1998-11-10
- 发明人: Anton Werner Keller
- 申请人： Anton Werner Keller
- 申请人地址： NJ Princeton
- 专利权人： RCA Thomson Licensing Corporation
- 当前专利权人： RCA Thomson Licensing Corporation
- 当前专利权人地址： NJ Princeton
- 主分类号： H04N5/202
- IPC分类号： H04N5/202 ; H04N5/66 ; H04N5/68 ; H04N9/64 ; H04N9/69
摘要：
An amplifier (60) provides an amplified video signal in response to a video input signal supplied thereto. A cathode current sensor (Q3), couples an output of the amplifier to the cathode of a kinescope (20) and also provides an output current (Ik) proportional to the kinescope cathode current. A feedback path (82) applies a portion of the sensed cathode current provided by the cathode current sensor to a circuit node (65 or 63) in the amplifier for imparting gamma correction to images produced by the kinescope. In one application the cathode current is apportioned (Q3, Q5) to provide gamma correction for the kinescope and to provide automatic kinescope bias (AKB) control.
公开/授权文献
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