发明授权
US5400086A Color CRT drive apparatus and CRT display including a brightness
adjustment
失效
彩色CRT驱动装置和CRT显示器,包括亮度调节
- 专利标题: Color CRT drive apparatus and CRT display including a brightness adjustment
- 专利标题(中): 彩色CRT驱动装置和CRT显示器,包括亮度调节
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申请号: US124089申请日: 1993-09-21
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公开(公告)号: US5400086A公开(公告)日: 1995-03-21
- 发明人: Yuji Sano , Kouji Kitou , Ikuya Arai , Michitaka Ohsawa , Yoshio Amemiya
- 申请人: Yuji Sano , Kouji Kitou , Ikuya Arai , Michitaka Ohsawa , Yoshio Amemiya
- 申请人地址: JPX Tokyo
- 专利权人: Hitachi, Ltd.
- 当前专利权人: Hitachi, Ltd.
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX1-292280 19891113; JPX2-278985 19901019
- 主分类号: H04N9/73
- IPC分类号: H04N9/73
摘要:
A picture tube drive apparatus for driving a color picture tube. The picture tube drive apparatus comprises a video output circuit which receives video signals, amplifies them and outputs the amplified video signals, a picture tube drive circuit which receives the video signals amplified by the video output circuit for driving said color picture tube based on video signals, said picture tube drive circuit having means for detecting a beam current corresponding to the brightness of each color flowing through said picture tube, a picture tube connected with said picture tube drive circuit for displaying the video signals, a white balance control circuit into which a detection value of a beam current detected by said picture tube drive circuit is inputted and for outputting video signal level compensation signals for adjusting the white balance of the video image displayed on said picture tube to said picture tube drive circuit. A color picture tube in which an electron shield frame having at most a width which will not prevent electron beam from flying onto said shadow mask from an electron gun and having a function to suppress the reflection of the electron beam on a fluorescent screen is disposed on the inner peripheral surface of said electron on the side of the electron gun with respect to a shadow mask mounting position in the color tube.
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