发明名称 |
Optical black level control circuit |
摘要 |
An optical black level control circuit comprises a digital black level adjusting circuit for generating a black level correction signal by digital processing using a given time constant when an output error between an optical black level and a reference optical black level signal is within a predetermined range so that an error becomes less than a predetermined value and an analog black level adjusting circuit for compensating for said error when said error exceeds the predetermined range.
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申请公布号 |
US2005237402(A1) |
申请公布日期 |
2005.10.27 |
申请号 |
US20050111014 |
申请日期 |
2005.04.21 |
申请人 |
SASE MASATOSHI;HIGASHI KOICHI |
发明人 |
SASE MASATOSHI;HIGASHI KOICHI |
分类号 |
H04N5/18;H04N5/335;H04N5/357;H04N5/363;H04N5/369;H04N5/378;H04N9/72;(IPC1-7):H04N5/18 |
主分类号 |
H04N5/18 |
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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