US Patent 7394444 LED driver

Patent 7394444 was granted and assigned to Samsung on July, 2008 by the United States Patent and Trademark Office.

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Patent

Patent attributes

Current Assignee

Samsung

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7394444

Date of Patent

July 1, 2008

Patent Application Number

11262807

Date Filed

November 1, 2005

Patent Primary Examiner

Douglas W Owens

Patent abstract

The present invention relates to an LED driver for driving light emitting diodes. The LED driver comprises a linear mode driver to increase and decrease a linear mode current to make a current flow in the LED at a predetermined target current value and output it to the LED; and a switch mode driver to increase and decrease a switch mode current depending on whether the linear mode current exceeds a predetermined reference current value and output it to the LED. Thus, the present invention provides an LED driver having high power efficiency and light efficiency and minimal distortions of a driving current.

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