Irradiation control device

Details Irradiation control device Irradiation control device

2006-07-04

2006-07-04

Porta, David (Department: 2884)

Radiant energy

Invisible radiant energy responsive electric signalling

Signalling means controls incident radiation

C250S338100, C250S330000, C250S332000

Reexamination Certificate

active

07071472

ABSTRACT:
In an irradiation control device which extends a longevity of an LED, a feedback control is performed to an irradiating portion by an output signal of a photo device provided in relation to the irradiating portion, thereby making brightness fixed. Alternatively, by performing image processing to an image taken by a camera, brightness on a screen is calculated, so that a feedback control is performed to the irradiating portion to make the brightness fixed. Alternatively, based on a recognition rate upon character recognition within the image taken by the camera, a feedback control is performed to the irradiating portion to make the brightness fixed.

REFERENCES:
patent: 6336023 (2002-01-01), Toyama et al.
patent: 2002/0191102 (2002-12-01), Yuyama et al.
patent: 2003/0156755 (2003-08-01), Watanabe et al.
patent: 5-219447 (1993-08-01), None
patent: 10-261190 (1998-09-01), None
patent: 2000-306684 (2000-11-01), None
patent: 2000-338557 (2000-12-01), None
International Search Report dated Jul. 22, 2003.

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