发明名称 |
APPARATUS FOR CONTROLLING CONSTANT CURRENT FOR MULTI-CHANNEL LEDS AND LIQUID CRYSTAL DISPLAY USING THE SAME |
摘要 |
An apparatus for controlling the constant current for multi-channel LEDs includes: a plurality of LED channels each comprising an LED array, a transistor, and a variable emitter resistor; a feedback sensing circuit for sensing the collector or drain voltage of a transistor of each of the LED channels; and a controller for increasing the variable emitter resistance of an LED channel in which the collector voltage of the transistor is higher than those of the other LED channels, in response to a feedback sensing result input from the feedback sensing circuit.
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申请公布号 |
US2013114016(A1) |
申请公布日期 |
2013.05.09 |
申请号 |
US201213671714 |
申请日期 |
2012.11.08 |
申请人 |
LG DISPLAY CO., LTD.;LG DISPLAY CO., LTD. |
发明人 |
LIM SEONGHO;KIM EUNGKYU;KIM TAEWOO |
分类号 |
H05B37/02;G02F1/1368 |
主分类号 |
H05B37/02 |
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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