Patent ID: 8823623
Filing Date: 2014-09-02
Classification: G01K,G09G

Abstract:
1. A liquid crystal display driver, in which a frame rate of an input image signal is multiplied by 2N (N is an integer of one or more), so that each frame is divided into N positive field(s) and N negative field(s) respectively, the image signal is supplied to a liquid crystal panel with a positive polarity in a positive field, and the image signal is supplied to the liquid crystal panel with a negative polarity in a negative field, comprising: corrected image signal generating portion for generating a corrected image signal having a substantially same overall amount of correction added to the positive field and the negative field, wherein the corrected image signal generated by the corrected image signal generating portion is supplied to the liquid crystal panel with the positive polarity in the positive field and the corrected image signal generated by the corrected image signal generating portion is supplied to the liquid crystal panel with the negative polarity in the negative field, and selection of the correction values to be applied from a designated table are based on both a determined temperature and image signal luminance data in order to select an appropriate correction amount, and wherein a processor determines which correction values are to be applied from the tables of values based on the determined temperature and information from a plurality of frame memories containing multiple frames of image information in addition to the current frame data, and wherein the tables of values include first-half field correction tables and second-half field correction tables which determine correction based on luminance gray scale of the image signal of a current field and luminance gray scale of the image signal 2N fields before.