发明名称 |
Driver for Driving LED Backlight Source, LED Backlight Source and LCD Device |
摘要 |
A driver for driving an LED backlight source is disclosed. The driver includes a boost converter for boosting inputted DC voltage and outputting boosted DC voltage to an LED series circuit having LEDs connected and a resistor in series, a feedback circuit for feeding back voltage across the resistor to a backlight driving circuit, and a control switch controlled by output of the backlight driving circuit depending on feedback voltage of the voltage across the resistor for keeping current flowing through the LED series circuit in a constant current. The driver drives the LED series circuit with a constant current, thereby prolonging lifetime of each LED of the LED series circuit. Furthermore, since a time period which the current flowing through the LED series circuit approaches to constant value is shorter, the driver has advantages over lower power consumption, faster response time and better operating efficiency. |
申请公布号 |
US2014375930(A1) |
申请公布日期 |
2014.12.25 |
申请号 |
US201313980030 |
申请日期 |
2013.06.26 |
申请人 |
SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD. |
发明人 |
Zhang Hua |
分类号 |
H05B33/08;G02F1/1335 |
主分类号 |
H05B33/08 |
代理机构 |
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代理人 |
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主权项 |
1. A driver for driving a light emitting diode backlight source, comprising:
a boost converter, for boosting inputted direct current (DC) voltage and outputting boosted DC voltage to a light emitting diode (LED) series circuit having a plurality of LEDs connected and a resistor in series; a feedback circuit, for feeding back voltage across the resistor to a backlight driving circuit; and a control switch controlled by output of the backlight driving circuit depending on feedback voltage of the voltage across the resistor, for keeping current flowing through the LED series circuit in a constant current. |
地址 |
Shenzhen, Guangdong CN |