Direct-type back light module with photo sensors

Details Direct-type back light module with photo sensors Direct-type back light module with photo sensors

2005-07-05

2005-07-05

Philogene, Haissa (Department: 2828)

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

C315S291000, C315S224000, C345S102000, C345S081000, C345S207000, C345S084000

Reexamination Certificate

active

06914389

ABSTRACT:
A direct-type backlight module with photo sensors has a plurality of lamps, a plurality of the photo sensors for detecting illumination of corresponding lamps, a comparative and arithmetic unit for processing signals generated by the photo sensors, and a main lamp driving loop for receiving feedback signals generated by the comparative and arithmetic unit and adjusting a lamp current voltage outputted by a minor lamp driving loop of each lamp, so as to achieve an uniform illumination of each lamp.

REFERENCES:
patent: 6636190 (2003-10-01), Hirakata et al.
patent: 2004/0125071 (2004-07-01), Kim et al.
patent: 2004/0232853 (2004-11-01), Hur et al.

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