Patent ID: 9019317
Filing Date: 2015-04-28
Classification: G09G

Abstract:
1. A liquid crystal display, comprising: a liquid crystal display panel including data lines and gate lines; a data driving circuit configured to drive the data lines; a gate driving circuit configured to drive the gate lines; a timing controller configured to divide a unit frame period into: a backlight unit configured to provide light to the liquid crystal display panel by using a plurality of light sources; a light source driving circuit configured to: a light source control circuit configured to generate a pulse width modulation signal to control a turn-on time of the plurality of light sources, wherein the timing controller is further configured to synchronize an input data and a copied data to repeatedly supply a same data to the data driving circuit during the first and second sub-frame periods, wherein a start point of the turn-on time depends on a duty ratio of the pulse width modulation signal after the liquid crystals in a middle portion of the liquid crystal display panel are saturated in response to a unit frame data, wherein an end point of the turn-on time is fixed to be immediately before a time in which data of a next frame is written in the middle portion of the liquid crystal display panel, wherein a level of a driving current driving the plurality of light sources is inversely proportional to a maximum duty ratio of the pulse width modulation signal output from the light source control circuit, wherein the light source control circuit comprises: wherein the backlight unit includes a light guide plate having one of a plurality of depressed patterns, embossed patterns, prism patterns, and lenticular patterns.