发明名称 |
Sample-and-hold iris control system |
摘要 |
An iris control system uses a sample-and-hold circuit to provide a constant image signal to control an iris of a camera. To facilitate active iris control, a DC-AC converter is used to convert the constant image signal to an AC iris control having a peak amplitude that is based on the DC amplitude of the constant image signal.
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申请公布号 |
US6549238(B1) |
申请公布日期 |
2003.04.15 |
申请号 |
US19980149948 |
申请日期 |
1998.09.09 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
NOOIJEN JOHANNES B. M. |
分类号 |
G03B7/085;H04N5/238;(IPC1-7):H04N5/238 |
主分类号 |
G03B7/085 |
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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