Image projection apparatus for adjusting white balance in...

Details Image projection apparatus for adjusting white balance in... Image projection apparatus for adjusting white balance in...

2006-02-14

2008-05-27

Epps, Georgia (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

C345S032000, C345S207000

Reexamination Certificate

active

07378631

ABSTRACT:
An image projection apparatus which adjusts a white balance in consideration of levels of light emitted from light-emitting diodes and a white balance adjustment method thereof. The image projection apparatus comprises a light source unit for sequentially emitting lights generated by a red (R)-light emitting element, a green (G)-light emitting element, and a blue (B)-light emitting element. An image generation unit generates an image using the lights sequentially emitted from the light source unit and projecting the image. A driving unit drives the light source unit and the image generation unit. A light sensor measures levels of lights generated by the R-light emitting element, the G-light emitting element, and the B-light emitting element. A controller controls a driving operation of the driving unit based on the levels of lights measured by the light sensor to adjust a white balance of the image projected from the image generation unit.

REFERENCES:
patent: 6628248 (2003-09-01), Masumoto
patent: 2001-117164 (2001-04-01), None
patent: 2004-163527 (2004-06-01), None
patent: 10-2004-0014636 (2004-02-01), None
patent: 10-2004-0053750 (2004-06-01), None
patent: 10-2004-0054480 (2004-06-01), None

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