Patent ID: 7218305

Claim:
A liquid crystal display comprising: a display panel; a back light irradiating through said display panel; an input terminal receiving an image discriminating signal indicating whether an image displayed on said display panel is a dynamic image or not in response to a ratio of an area of said display panel to an area where said dynamic image is displayed; a back light control circuit controlling a brightness of said back light; wherein said brightness of said back light is set to a first predetermined brightness when said image discriminating signal indicates that said display panel displays a dynamic image and said brightness of said back light is set to a second predetermined brightness when said image discriminating signal indicates that said display panel displays a static image, wherein the first predetermined brightness is greater than the second predetermined brightness; and a display controller which displays a part or the whole of a dynamic image in a single color for a predetermined period when said image discriminating signal indicates that said display panel displays a dynamic image, and displays a static image without inserting a single color when said image discriminating signal indicates that said display panel displays a static image.