LED driving apparatus and method of controlling luminous power

Details LED driving apparatus and method of controlling luminous power LED driving apparatus and method of controlling luminous power

2011-03-29

2011-03-29

Wang, Quan-Zhen (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S084000, C345S102000, C345S204000, C345S207000, C345S691000

Reexamination Certificate

active

07916101

ABSTRACT:
A light emitting diode (LED) driving apparatus includes a drive section for driving an LED to emit light, and a control section that controls a driving current supplied from the drive section to the LED. The control section implements luminous power control by controlling an ON/OFF ratio of the driving current if a target value of luminous power of the LED is smaller than a predetermined value. The control section implements luminous power control by controlling a level of the driving current if the target value is equal to or larger than the predetermined value.

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patent: 2003/0214242 (2003-11-01), Berg-johansen
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patent: 04-134486 (1992-05-01), None
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patent: 2004-253804 (2004-09-01), None
patent: 03/017247 (2003-02-01), None

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