Backlight dimmer circuit and backlight dimming method

Patent metadata

Field	Value
Publication number	US-8975835-B2
Application number	US-201213807722-A
Country	US
Kind code	B2
Filing date	Nov 25, 2012
Priority date	Nov 16, 2012
Publication date	Mar 10, 2015
Grant date	Mar 10, 2015

Abstract

The present invention relates to a backlight dimmer circuit and a backlight dimming method. The backlight dimmer circuit includes a PLL dimming module, which detects a rising edge of a 3D synchronous signal to generate multiple channels of 3D mode dimming signal in phase with the 3D synchronous signal; a phase delay module, which generates time-divided outputs of the multiple channels of 3D mode dimming signal according to a delay set value; an external dimming module, which receives an external dimming signal to generate a 2D mode dimming signal; and a trigger, which receives the 2D mode dimming signal and the multiple channels of 3D mode dimming signal and determines whether to output the 2D mode dimming signal or the multiple channels of 3D mode dimming signal according to a 2D/3D conversion signal.

First claim

What is claimed is:

1. A backlight dimmer circuit, comprising:
a PLL (Phase-Locked Loop) dimming module, which detects a rising edge of a 3-dimentional (3D) synchronous signal in order to generate multiple channels of a 3D mode dimming signal that are in phase with the 3D synchronous signal, the PLL dimming module further determining a duty ratio of a 3D mode according to an analog dimming direct current (DC) duty;
a phase delay module, which receives the multiple channels of th…

Assignees

• Shenzhen China Star Optoelect
• Shenzhen China Star Optoelctronics Technology Co Ltd

Inventors

• Yang Xiang

Classifications

• G09G3/003

  Physics · mapped topic

• G09G2320/0626

  Physics · mapped topic

• H04N13/00

  Electricity · mapped topic

• H04N13/341

  Electricity · mapped topic

• H04N13/356

  Electricity · mapped topic