Liquid crystal display device

Details Liquid crystal display device Liquid crystal display device

2007-12-25

2007-12-25

Hjerpe, Richard (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S087000, C345S102000

Reexamination Certificate

active

10901668

ABSTRACT:
A backlight driving circuit is controlled by a timing controller and executes on/off control of the backlights. The timing controller detects, using a synchronous signal, a change in a blank period which is of one frame period for display of one screen, during which the image signal is not transmitted. Upon detecting the change in the blank period, the timing controller adjusts the on-periods of the backlights in order to make the brightness of the backlights equal to one another. Consequently, the backlights have an equal brightness with one another in spite of the change in the blank period. This makes the lives of the backlights equal to one another. In a case where the plural backlights constitute a backlight unit, a reduction in life of the backlight unit is prevented. Further, it is also possible to prevent the brightness of the backlights from being differentiated even through a long-term use.

REFERENCES:
patent: 6815904 (2004-11-01), Choi
patent: 6906691 (2005-06-01), Park et al.
patent: 6963179 (2005-11-01), Yu et al.
patent: 2002-006815 (2002-01-01), None

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