Method for controlling the on/off function of an LED in a...

Details Method for controlling the on/off function of an LED in a... Method for controlling the on/off function of an LED in a...

2004-04-16

2010-02-02

Safaipour, Houshang (Department: 2625)

Facsimile and static presentation processing

Facsimile

Picture signal generator

C358S475000, C358S509000, C358S474000

Reexamination Certificate

active

07656563

ABSTRACT:
A method for controlling ON/OFF of LED in a scanner which replaces CCFL with LED as a light source is provided so as to solve the problem of excessively long warm-up time of CCFL in the prior art. Meanwhile, to achieve intermittent heat dissipation, LED is switched ON/OFF according to the frequency of the scanner receiving optical signals.

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patent: 2003-162014 (2003-06-01), None

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