发明名称 |
Circuit arrangement for indicating ambient light conditions of a video pickup and video display device |
摘要 |
Users of video telephones or multimedia terminals cannot determine whether ambient light conditions during a transmission to another terminal are always of good quality. Provision is made for an indication regarding the ambient light conditions during a telephone call, and control thereof. By means of a circuit arrangement including a photocell (F) to detect incident light, a signal (II) is formed, which corresponds to the ambient light conditions. The signal (II) is displayed together with a video signal (I), or is used for control purposes.
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申请公布号 |
US5734439(A) |
申请公布日期 |
1998.03.31 |
申请号 |
US19960609499 |
申请日期 |
1996.03.01 |
申请人 |
ALCATEL N.V. |
发明人 |
WIRBITZKI, PETER;WILLHAUS, WERNER;RIVOIR, JUERGEN |
分类号 |
H04N7/14;(IPC1-7):H04N5/445 |
主分类号 |
H04N7/14 |
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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