发明名称 |
Discharge lamp ignition device and projector |
摘要 |
<p>To avoid the phenomenon of unsightly flickering in images projected by the projector, in high pressure discharge lamps-especially in high intensity discharge lamps, such as high pressure mercury lamps, metal halide lamps, and xenon lamps-that are used in projectors, even in the presence of the phenomenon of cyclical modulation of the lamp voltage by the returning light spectrum when light reflected by the dynamic color filter returns back through the optical system to the lamp, at least during steady operation of the discharge lamp (Ld), a target lamp current signal generation circuit (Up) acquires multiple lamp voltage detection signal (Sv) over a period that is at least as long as the color order cycle of the dynamic color filter (Of) and generates a target lamp current signal (St) based on the multiple lamp voltage detection signals (Sv) that were acquired.</p> |
申请公布号 |
EP1809081(A2) |
申请公布日期 |
2007.07.18 |
申请号 |
EP20070000532 |
申请日期 |
2007.01.11 |
申请人 |
USHIODENKI KABUSHIKI KAISHA |
发明人 |
FUKUDA, MINORU;OKAMOTO, MASASHI;HORIKOSHI, MITSUO |
分类号 |
H05B41/292;H05B41/04;H05B41/38 |
主分类号 |
H05B41/292 |
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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