Patent ID: 9171510
Filing Date: 2015-10-27
Classification: G09G

Abstract:
1. A method for setting a gamma reference voltage, comprising: acquiring a dielectric constant of a liquid crystal capacitor according to a first gamma reference voltage; acquiring a value of the liquid crystal capacitor according to the dielectric constant of the liquid crystal capacitor; acquiring a feedback voltage according to the value of the liquid crystal capacitor, acquiring a second gamma reference voltage according to the feedback voltage, and updating the first gamma reference voltage to the second gamma reference voltage; wherein before acquiring a dielectric constant of a liquid crystal capacitor according to a first gamma reference voltage, further comprising: determining first gamma reference voltages corresponding to different gray scales, respectively; grouping all the gray scales into different gray scale regions; and wherein acquiring a dielectric constant of a liquid crystal capacitor according to a first gamma reference voltage comprises: acquiring, according to respective first gamma reference voltages corresponding to different gray scales within one of the gray scale regions, dielectric constants of the liquid crystal capacitor corresponding to the different gray scales respectively, and acquiring an average of the dielectric constants in said gray scale region; wherein acquiring a value of the liquid crystal capacitor according to the dielectric constant of the liquid crystal capacitor comprises: acquiring the value of the liquid crystal capacitor corresponding to said gray scale region according to the average of the dielectric constants corresponding to said gray scale region.