Title:
カメラフラッシュ用LED制御装置
Document Type and Number:
Japanese Patent JP4015654
Kind Code:
B2
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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Inventors:
Gold and tin
Gold heaven
Gold heaven
Application Number:
JP2004270502A
Publication Date:
November 28, 2007
Filing Date:
September 16, 2004
Export Citation:
Assignee:
Samsung Electric Co., Ltd.
International Classes:
G03B15/05; G03B7/17; G03B15/02; G03B15/03; H01S3/00; H04N5/225; H04N101/00
Domestic Patent References:
| JP7140377A | ||||
| JP2000147615A | ||||
| JP2003307771A | ||||
| JP2003174587A | ||||
| JP2003338973A | ||||
| JP4063161U |
Attorney, Agent or Firm:
Jun Takamura