Method and circuit for synchronizing input and output synchronization signals, backlight driver of liquid crystal display device using the same and method for driving the backlight driver

摘要

Disclosed are method and circuit for synchronizing input and output synchronization signals, which can synchronize an output synchronization signal based on frequency change of an input synchronization signal and limit input and output periods, thereby preventing flickering, a backlight driver of a liquid crystal display device using the same, and a method for driving the backlight driver. The method for synchronizing input and output synchronization signals, includes generating an output synchronization signal whose output period is set based on a comparison result between an input period of an input synchronization signal and a previous output period of the output synchronization signal, and limiting the output period of the output synchronization signal within a predefined limit range from the previous output period.

主权项

1. A method for synchronizing input and output synchronization signals, the method comprising:
generating an output synchronization signal whose output period is set based on a comparison result between an input period of an input synchronization signal and a previous output period of the output synchronization signal, wherein the output period of the output synchronization signal is set as a sum of the input period of the input synchronization signal and a difference between the input period of the input synchronization signal and the previous output period of the output synchronization signal; and limiting the output period of the output synchronization signal within a predefined limit range from the previous output period.