Light source controlling circuit and portable electronic...

Details Light source controlling circuit and portable electronic... Light source controlling circuit and portable electronic...

2008-09-23

2008-09-23

Owens, Douglas W. (Department: 2821)

Electric lamp and discharge devices: systems

With automatic shunt and/or cutout

C315S309000, C345S082000, C345S102000

Reexamination Certificate

active

11111707

ABSTRACT:
A light source controlling circuit controls a light source outputting continuous light. The light source controlling circuit has a power supply circuit supplying an electric power to the light source, a light source monitoring circuit monitoring a state of the light source, and a control circuit outputting a first control signal to control the light source is controlled. The light source monitoring circuit outputs a second control signal to control the light source in correspondence to a state of the light source. A portable electronic apparatus has a light source outputting continuous light, an image pickup device, and the light source controlling circuit. The light source controlling circuit, for example, controls ON/OFF of the light source in accordance with a temperature of the light source detected by the light source monitoring circuit.

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