Backlight dimming method and liquid crystal display using the same

摘要

A backlight dimming method and a liquid crystal display using the same are disclosed. The backlight dimming method includes producing a first backlight dimming value controlling a backlight luminance of a liquid crystal display panel, producing a convex gain which has less value in a peripheral part of a screen of the liquid crystal display panel than a central part of the screen, reducing the first backlight dimming value to be applied to the peripheral part of the screen using the convex gain to produce a second backlight dimming value, and controlling the backlight luminance of the liquid crystal display panel using the second backlight dimming value.

主权项

1. A backlight dimming method comprising:
producing a first backlight dimming value controlling a backlight luminance of a liquid crystal display panel, wherein a screen of the liquid crystal display panel is virtually divided into a plurality of blocks, having a peripheral part of the screen comprises the plurality of blocks disposed along a peripheral of the screen, and a central part of the screen comprises the plurality of blocks disposed in a central part of the screen away from the peripheral part; producing a convex gain which has less value in the peripheral part of a screen of the liquid crystal display panel than the central part of the screen; reducing the first backlight dimming value to be applied to the peripheral part of the screen using the convex gain to produce a second backlight dimming value; controlling the backlight luminance of the liquid crystal display panel using the second backlight dimming value; analyzing at least one of a complexity and a luminance of an input image; and adjusting the convex gain based on the result of an analysis of the input image; wherein the analyzing of at least one of the complexity and the luminance of the input image includes: detecting a number of edges from the input image to be displayed on the peripheral part of the screen; and producing a first parameter, which is proportional to the number of detected edges from input image to be displayed on the peripheral part of the screen, wherein the convex gain is reduced in proportion to the first parameter.