发明名称 |
A television system having an ultrablack video signal blanking level for an on-screen character display. |
摘要 |
<p>An arrangement for displaying characters and/or graphics on the screen of a television system including a brightness control section (23) for controlling the black level of video images includes a character blanking section (79) for blanking behind the video image so as to make the characters and/or graphics more visible. The character blanking section is coupled to the brightness control section for generating an "ultra-black" character blanking level which tracks, but is slightly greater (in the black direction) than the black level for the video image. <IMAGE></p> |
申请公布号 |
EP0512332(A2) |
申请公布日期 |
1992.11.11 |
申请号 |
EP19920106981 |
申请日期 |
1992.04.24 |
申请人 |
THOMSON CONSUMER ELECTRONICS S.A. |
发明人 |
KIM, YONG HYUN |
分类号 |
H04N5/445;H04N5/57;H04N9/74 |
主分类号 |
H04N5/445 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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