Direct backlight module using optical feedback

Details Direct backlight module using optical feedback Direct backlight module using optical feedback

2007-08-22

2009-11-17

Pyo, Kevin (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

C250S228000, C250S239000, C362S238000, C362S561000

Reexamination Certificate

active

07619192

ABSTRACT:
A direct-light-type backlight module uses optical feedback to control point light sources for obtaining a default luminance. Each point light source drives a section in a cyclic time domain to emit a light. A photo detector detects a brightness and the brightness is thus controlled by the optical feedback from the photo detector.

REFERENCES:
patent: 2007/0170449 (2007-07-01), Anandan

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