Apparatus and method for driving backlight of liquid crystal...

Details Apparatus and method for driving backlight of liquid crystal... Apparatus and method for driving backlight of liquid crystal...

2011-03-22

2011-03-22

Tran, My-Chau T (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S084000, C345S087000

Reexamination Certificate

active

07911440

ABSTRACT:
A backlight driving apparatus of a liquid crystal display (LCD) apparatus including a master trans and a slave trans for supplying a current to a plurality of lamps, and a master driver and a slave driver for driving the lamps, includes an operated condition unit that converts an AC voltage generated in accordance with a phase difference between a master AC voltage and a slave AC voltage fed back from the master trans and the slave trans, respectively, into an analog DC voltage; a protect controller that determines an error is generated during an operation of the lamps using the analog DC voltage and outputs an operating error signal when an error is generated; and a lamp driving controller that stops driving the master driver and the slave driver in response to the operating error signal.

REFERENCES:
patent: 6420839 (2002-07-01), Chiang et al.
patent: 6954364 (2005-10-01), Min
patent: 7218059 (2007-05-01), Li et al.
patent: 7282866 (2007-10-01), Nakanishi
patent: 7619371 (2009-11-01), Chen
Abstract for CN 1575084 A, published Feb. 2, 2005.

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