发明名称 |
DISCHARGE LAMP LIGHTING DEVICE, AND LIGHTING SYSTEM USING THE SAME, AND LIQUID CRYSTAL DISPLAY DEVICE |
摘要 |
PROBLEM TO BE SOLVED: To accurately detect a voltage or a current of a discharge lamp to perform abnormality detection or output adjustment while maintaining a light output instructed by a PWM signal, in a burst dimming type discharge lamp lighting device. SOLUTION: The discharge lamp lighting device comprises an inverter circuit 1 which converts a DC voltage to a high frequency and supplies it to a discharge lamp LF; a detection timing circuit 4 which inputs PWM signal 3 for performing dimming in a ratio of an ON-period to an OFF-period, and switches, according to the PWM signal 3, an output of the inverter circuit 1 from an intermittent lighting state for flashing the discharge lamp FL to a continuous lighting state at an optional time so that a light output equal to an average light output in the intermittent lighting state can be obtained in the continuous lighting state; and a detection circuit 5 which detects at least one of a voltage and a current of the discharge lamp FL in a state of being switched to the continuous lighting state by the detection timing circuit 4. COPYRIGHT: (C)2009,JPO&INPIT |
申请公布号 |
JP2008235237(A) |
申请公布日期 |
2008.10.02 |
申请号 |
JP20070159329 |
申请日期 |
2007.06.15 |
申请人 |
MATSUSHITA ELECTRIC WORKS LTD |
发明人 |
MISHIMA MASANORI;NARUO MASAHIRO |
分类号 |
H05B41/24;G02F1/133;G02F1/13357;H05B41/392 |
主分类号 |
H05B41/24 |
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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