发明名称 |
Instant-on light source |
摘要 |
A light source includes a high pressure discharge lamp and incandescent filaments which provide illumination during the warm-up and hot restart periods associated with the discharge lamp. A current regulator, which provides dc power to the discharge lamp, draws sufficient current through one filament to energize the filament only during discharge lamp warm-up. A second filament provides illumination during the period after the occurrence of a momentary power failure or power transient which is required by the discharge lamp to cool down to its maximum starting temperature. A bimetal switch permits current flow through the second filament when the discharge lamp is above the maximum starting temperature. An electronic switch permits current flow through the second filament when a current sensing resistor senses a lack of current through the discharge lamp.
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申请公布号 |
US4278916(A) |
申请公布日期 |
1981.07.14 |
申请号 |
US19790099770 |
申请日期 |
1979.12.03 |
申请人 |
GTE LABORATORIES INCORPORATED |
发明人 |
REGAN, ROBERT J.;HAUGSJAA, PAUL O. |
分类号 |
H05B35/00;H05B41/16;H05B41/38;H05B41/46;(IPC1-7):H05B41/36 |
主分类号 |
H05B35/00 |
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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