Apparatus and method for creating large display back-lighting

Details Apparatus and method for creating large display back-lighting Apparatus and method for creating large display back-lighting

2005-03-04

2008-12-23

Awad, Amr (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S082000

Reexamination Certificate

active

07468723

ABSTRACT:
A driver for a series-coupled white LED string is provided. The driver includes a boost converter that is arranged to provide an output voltage from a source voltage. Also, the driver includes one switch that is coupled across half of the series-coupled LEDs, and another switch that is coupled across the other half of the series-coupled LEDs. A 50% duty cycle signal is employed to control the switches. While the boost converter is enabled, one of the switches is on and the other is off.

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