发明名称 |
LIGHT EMITTING DIODE DRIVING CIRCUIT, AND DISPLAY DEVICE HAVING THE SAME |
摘要 |
A light-emitting-diode (LED) driving circuit and a display device include a current driving circuit, a level detector, a comparing circuit, a digital control circuit, and a power supply circuit. The level detector detects a minimum detection voltage signal having a minimum voltage level among voltage signals of first terminals of respective LED strings. The comparing circuit generates a first comparison output signal and a second comparison output signal based on a headroom-control reference voltage and the minimum detection voltage signal. The digital control circuit adjusts a duty ratio of a gate control signal in a digital mode based on the first comparison output signal, the second comparison output signal and a control clock signal. Therefore, the LED driving circuit has a small area in a semiconductor integrated circuit.
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申请公布号 |
US2012127214(A1) |
申请公布日期 |
2012.05.24 |
申请号 |
US201113241737 |
申请日期 |
2011.09.23 |
申请人 |
HAN HEE-SEOK;KIM JONG-SEON;SAMSUNG ELECTRONICS CO., LTD |
发明人 |
HAN HEE-SEOK;KIM JONG-SEON |
分类号 |
G09G3/14;G09G5/10;H05B37/02 |
主分类号 |
G09G3/14 |
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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