Device for driving light emitting diode for flash of camera

Details Device for driving light emitting diode for flash of camera Device for driving light emitting diode for flash of camera

2007-06-26

2007-06-26

Perkey, W. B. (Department: 2851)

Photography

With object illumination for exposure

Having preexposure illumination

C396S164000, C348S371000

Reexamination Certificate

active

10935360

ABSTRACT:
Disclosed herein is a device for driving a LED for a flash of a camera, such as a digital camera or a camera of a mobile phone, which is capable of driving the LED in two modes to reduce power consumption. The LED drive device comprises the LED, a continuous low current driver for continuously supplying current which is lower than or equal to rated current of the LED to the LED, a high-current pulse driver for supplying current which is higher than the rated current of the LED to the LED for a predetermined period of time, and a mode selector for selecting one of the continuous low current driver and the high-current pulse driver to drive the LED. According to the present invention, it is possible to prevent unnecessary power consumption and deterioration of reliability of the LED, and obtain an image of brighter picture quality.

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Japanese Patent Office, Office Action, mailed Jun. 27, 2006.
Japanese Patent Office, Office Action mailed Feb. 6, 2007.

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