Backlight driver, display apparatus having the same and...

Details Backlight driver, display apparatus having the same and... Backlight driver, display apparatus having the same and...

2011-03-08

2011-03-08

Nguyen, Kimnhung (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S084000, C345S087000, C315S291000

Reexamination Certificate

active

07903081

ABSTRACT:
A backlight driver includes an inverter controller, a dimming signal compensator and an inverter. The inverter controller generates a pulse width modulation signal in response to a control signal and outputs a first dimming signal that represents a duty ratio of the pulse width modulation signal and a second dimming signal that represents an amplitude of the pulse width modulation signal. The dimming signal compensator receives the first and second dimming signals, compares the first dimming signal with a predetermined reference duty ratio and compensates the second dimming signal in accordance with the compared result to generate a third dimming signal. The inverter outputs a driving voltage to drive the backlight and varies a voltage level of the driving voltage in response to the first and third dimming signals to control a brightness of the backlight.

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patent: 7315135 (2008-01-01), Kang et al.
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