发明名称 |
LED driving apparatus with temperature compensation function |
摘要 |
An LED driving apparatus having a temperature compensation function includes a reference voltage generator for generating a first reference voltage and a non-inversion amplification unit for performing non-inversion amplification to a difference voltage between the first reference voltage and a forward voltage with a preset gain. A driving unit adjusts a supply voltage in response to the voltage from the non-inversion amplification unit to supply the adjusted supply voltage to a light source having light emitting diodes. A forward voltage detector detects the forward voltage at an anode of the light emitting diodes of the light source to supply the forward voltage to the non-inversion amplification unit. Luminance variation can be compensated according to temperature changes by using a forward voltage of an LED light source so that the forward voltage of the LED light source can be controlled in association with a target current value of ambient temperature.
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申请公布号 |
US7683864(B2) |
申请公布日期 |
2010.03.23 |
申请号 |
US20070657083 |
申请日期 |
2007.01.24 |
申请人 |
SAMSUNG ELECTRO-MECHANICS CO., LTD. |
发明人 |
LEE DONG WOO;HWANG SOO RYONG;PARK MOO YOUN |
分类号 |
G09G3/32;H01L33/12;G09G3/36;G09G5/00 |
主分类号 |
G09G3/32 |
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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