Backlight module having detecting circuit and direct current...

Details Backlight module having detecting circuit and direct current... Backlight module having detecting circuit and direct current...

2008-05-27

2010-12-28

Tran, Thuy Vinh (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

C315S312000

Reexamination Certificate

active

07859198

ABSTRACT:
An exemplary backlight module includes lamps (21), a power supply circuit (20), a detecting circuit (22), and a direct current voltage compensation circuit (23). The power supply circuit is configured for supplying a driving voltage to the lamps. The first detecting circuit is configured for detecting a direct current voltage component of the driving voltage at one end of one of the lamps. The first direct current voltage compensation circuit is configured for providing a compensation direct current voltage to an opposite end of all the lamps according to the detected direct current voltage component.

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patent: 7492106 (2009-02-01), Sengoku et al.
patent: 2007/0103093 (2007-05-01), Hagen et al.

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