发明名称 |
Method and apparatus for lamp heat control |
摘要 |
A lamp drive circuit includes an electronic switch in series with the lamp and a source of DC voltage, a control input of the switch being pulse-width-modulated by a control circuit which includes a temperature-sensing circuit for reducing the pulse-width-modulation duty cycle when lamp temperature exceeds a predetermined temperature. The temperature-sensing circuit may include a thermal switch in series with one of two parallel-connected resistors in a timing circuit. Duty cycle may also be automatically adjusted in response to changes in the source voltage.
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申请公布号 |
US2005225256(A1) |
申请公布日期 |
2005.10.13 |
申请号 |
US20030677077 |
申请日期 |
2003.10.01 |
申请人 |
SCOLARO MARTIN S;GHODE ANIL P |
发明人 |
SCOLARO MARTIN S.;GHODE ANIL P. |
分类号 |
F21L4/00;F21V25/10;G05B11/28;H05B37/02;H05B41/285;H05B41/36;(IPC1-7):H05B37/02 |
主分类号 |
F21L4/00 |
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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