Patent ID: 8605030

Claim:
A light source device comprising: a light source module divided into a plurality of light-emitting blocks, which are individually operated; an image analysis part which extracts representative luminance data of a light-emitting block of the plurality of light-emitting blocks based on pixel data corresponding to the light-emitting block; a duty ratio calculation part which calculates duty ratio data of the light-emitting block based on the representative luminance data; a duty ratio storage part which stores duty ratio data; a duty ratio determination part which generates determined duty ratio data of the light-emitting block based on the duty ratio data calculated from the duty ratio calculation part and the duty ratio data stored in the duty ratio storage part during a first period corresponding to a plurality of frames; and a signal generation part which generates a driving signal having a duty ratio corresponding to the determined duty ratio data to drive the light-emitting block, wherein the determined duty ratio data is a predetermined high duty ratio applied to the light-emitting block during a second period corresponding to a plurality of frames, when the duty ratio data of the light-emitting block is less than a predetermined value during the first period.