Overvoltage protection method for backlight driver
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United States of America Patent
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Mar 17, 2015
Grant Date -
Jul 24, 2014
app pub date -
Feb 6, 2013
filing date -
Jan 21, 2013
priority date (Note) -
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Abstract
An overvoltage protection method for backlight driver includes: providing an LCD device having 2D and 3D modes, comprising a backlight driver comprising a constant current supplying chip and a dimming control coupled to the constant current supplying chip, the constant current supply chip applying a first overvoltage protection level and a second overvoltage protection level as a overvoltage protection level; detecting a signal of the dimming control by using the constant current flow supplying chip, and applying the first overvoltage protection level as the overvoltage protection level based on the signal of the dimming control when the LCD device is in the 2D mode; and detecting the signal of the dimming control by using the constant current flow supplying chip, and applying the second overvoltage protection level as the overvoltage protection level based on the signal of the dimming control when the LCD device is in the 3D mode.
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