LED driver with constant current offset unit

Details LED driver with constant current offset unit LED driver with constant current offset unit

2007-11-13

2007-11-13

Vo, Tuyet (Department: 2821)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S084000, C345S083000, C315S291000, C315S307000, C315S312000

Reexamination Certificate

active

11342572

ABSTRACT:
A light emitting diode (LED) driver to drive an LED, including a current adjusting unit to adjust magnitude of a current flowing on the LED by supplying power from a power supply device to the LED and cutting off the power. A modulation control unit is provided to modulate a waveform of the current flowing on the LED by controlling the adjustment operation of the current adjusting unit. A constant current offset unit to control the adjustment operation of the current adjusting unit is provided so that the current flowing on the LED is higher or equal to a predetermined value as the waveform thereof is modulated. Thus, provided is an LED driver having improved power consumption efficiency.

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