发明名称 |
Electronic control circuitry for terminating flash output |
摘要 |
A semiconductor switching element is connected in series with a flash tube to stop emission of flash light therefrom during operation of the flash tube. A first and a second integrating circuit are parallelly arranged to be connected either alternatively, or both together, with the switching element. The first integrating circuit integrates photo-current generated by a photocell receiving light from an object illuminated by the flash light, and the second integrating circuit integrates current that is manually adjustable. When both integrating circuits are connected with the switching element, the switching element is turned off by that integrating circuit which first reaches a predetermined trigger level.
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申请公布号 |
US4210849(A) |
申请公布日期 |
1980.07.01 |
申请号 |
US19790030634 |
申请日期 |
1979.04.16 |
申请人 |
MINOLTA CAMERA K K |
发明人 |
HOSOMIZU, HIROSHI;NAYA, MIKIO;OHTA, YOSHIHARU |
分类号 |
H05B41/32;(IPC1-7):H05B41/32 |
主分类号 |
H05B41/32 |
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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