| 发明名称 |
LED DRIVING DEVICE, LIGHT SOURCE DEVICE, AND LIQUID CRYSTAL DISPLAYING DEVICE |
| 摘要 |
A first power supply voltage Vin1 of a first input section and a second power supply voltage Vin2 of the second input section satisfy an expression Vf(min)≰Vin2<Vf(typ)<Vin1≰Vf(max). A switching controller alternately electrically connects the first input section or the second input section to LEDs, and based on the difference between an average forward current detected by a detector and a target value of the average forward current, controls the ratio of a period of time for which the first input section is connected to the LEDs to a period of time for which the second input section is connected to the LEDs so that the value of the average forward current approaches the target value.
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| 申请公布号 |
US2011254454(A1) |
申请公布日期 |
2011.10.20 |
| 申请号 |
US201013141923 |
申请日期 |
2010.02.18 |
| 申请人 |
SHARP KABUSHIKI KAISHA 22-22, NAGAIKE-CHO, ABENO-KU |
发明人 |
INOUE NAOTO;TOMIYOSHI AKIRA |
| 分类号 |
H05B37/00 |
主分类号 |
H05B37/00 |
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