Device for driving a backlight, backlight assembly, LCD...

Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix

Reexamination Certificate

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Details

C345S084000, C345S087000

Reexamination Certificate

active

07969404

ABSTRACT:
A liquid crystal display apparatus includes a backlight assembly which includes a device for driving the backlight including a light emitting diode (“LED”) used as a light source, which has a high efficiency and a high reliability for controlling brightness of each color light. The driving device drives a first, second and third LED unit emitting a first, second and third light, respectively. The driving device includes a first driving part emitting the first light in response to a brightness control signal and outputting a reference control signal in response to a first brightness of the first light, a second driving part driving the second LED units generating the second light of which second brightness is controlled in response to the reference control signal, and a third driving part driving the third LED units generating the third light of which third brightness is controlled in response to the reference control signal.

REFERENCES:
patent: 6069676 (2000-05-01), Yuyama
patent: 6608614 (2003-08-01), Johnson
patent: 6888529 (2005-05-01), Bruning et al.
patent: 7002547 (2006-02-01), Yamada
patent: 7460103 (2008-12-01), Konno et al.
patent: 2003/0169226 (2003-09-01), Yamada
patent: 2005/0184952 (2005-08-01), Konno et al.
European Search Report for Application No. 06022278.3-2205/1780701 dated Jun. 23, 2009.
European Examination Report for Application No. 06 022 278.3-2205 dated Mar. 5, 2010.

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