Voltage boost driving circuit for led backlight and LCD device having same
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United States of America Patent
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Aug 29, 2017
Grant Date -
Jan 5, 2017
app pub date -
Dec 13, 2014
filing date -
Sep 19, 2014
priority date (Note) -
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Abstract
The present invention provides a voltage boost driving circuit for LED backlight, which includes a first power input port, a second power input port, an LED light bar, a positive boost circuit, a negative boost circuit, and a luminance controlling circuit configured for controlling the luminance of the LED light bar; the first and second power input ports are respectively connected to the positive and negative poles of an external power supply; the positive boost circuit is connected between the first power input port and the positive pole of the LED light bar; the second power input port is connected to the ground; the negative boost circuit is connected to the positive boost circuit via the luminance controlling circuit, an output port of the negative boost circuit is connected to the negative pole of the LED light bar. An LCD device is further provided.
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