Patent ID: 8988333
Filing Date: 2015-03-24
Classification: G09G,H04N

Abstract:
1. A driving device of a liquid crystal display element comprising: a look-up table unit configured to convert input video signal data of N bits to (M+F+D) bit data, when N, M, F, and D are integers, by performing inverse gamma correction using a predetermined look-up table which holds a set of N bit data selected from a set of (M+F+D) bit data corresponding to luminance data generated by linear interpolation of measured luminance of the liquid crystal display element, and the set of N bit data serves so as to remove gamma correction from the input video signal data of N bits, where (M+F+D) is larger than N; an error diffusion unit configured to convert the (M+F+D) bit data processed by the look-up table unit, into (M+F) bit data by error diffusion processing; a frame rate control unit configured to derive a value of 0/1 from a frame rate control table for frame rate control based on lower F bit data of (M+F) bit data processed by the error diffusion unit, and configured to convert the (M+F) bit data processed by the error diffusion unit, into M bit data by adding the derived value of 0/1 to upper M bit data of (M+F) bit data; and a sub-frame data conversion unit configured to generate sub-frame data by using the M bit data processed by the frame rate control unit, configuring all sub-frames by a step-bit pulse respectively, and using a drive gradation table where when a drive gradation is 1, an arbitrary sub-frame reaches a drive state, and every time the drive gradation increases by one, a sub-frame adjacent to a sub-frame already in a drive state is set from a blanking state into a drive state.