Driving circuit of backlight module

Details Driving circuit of backlight module Driving circuit of backlight module

2009-07-02

2011-12-13

Mengistu, Amare (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C315S18500S, C315S192000, C315S291000

Reexamination Certificate

active

08077139

ABSTRACT:
A driving circuit of a backlight module is provided. The driving circuit has a dimming unit used for transmitting signals, wherein the dimming unit can adjust a current flowing through a light-emitting diode (LED) according a pulse width modulation signal and an enable signal, so as to adjust a light-emitting intensity of the LED. In the present invention, fewer devices are used to implement the dimming unit, and a transmission gate is replaced by a N-type transistor and a P-type transistor, such that a chip area and a circuit cost of the driving circuit are reduced.

REFERENCES:
patent: 8018170 (2011-09-01), Chen et al.
patent: 2007/0114951 (2007-05-01), Tsen et al.
patent: 2007/0222739 (2007-09-01), Yu et al.

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