发明授权
- 专利标题: Electric flash device
- 专利标题(中): 电动闪光装置
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申请号: US912000申请日: 1986-09-26
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公开(公告)号: US4697906A公开(公告)日: 1987-10-06
- 发明人: Takashi Kobayashi , Yuji Maruyama
- 申请人: Takashi Kobayashi , Yuji Maruyama
- 申请人地址: JPX Osoki
- 专利权人: West Electric Company, Ltd.
- 当前专利权人: West Electric Company, Ltd.
- 当前专利权人地址: JPX Osoki
- 优先权: JPX60-215439 19850927; JPX61-172086 19860722
- 主分类号: H05B41/32
- IPC分类号: H05B41/32 ; H05B41/00 ; G03B15/05
摘要:
An electric flash device for photography is controlled of its light radiation of a flash tube by a transistor, which is connected in series with the flash tube and is given its base current through a parallelly connected capacitor and resistor, and when the transistor turns OFF, an electric charge stored in the capacitor is applied across the base and the emitter of the transistor as a reverse bias.
公开/授权文献
- US5969645A Key input method and circuit 公开/授权日:1999-10-19