Patent ID: 9640128
Date: 2017-05-02
CPC Classifications: G09G

Claim:
1. A gamma voltage tuning method, comprising: dividing a display panel into at least two display areas, and performing following operations for each divided display panel: controlling a gate driving integrated circuit to drive multiple gate lines in the display area in turn, and a data driving integrated circuit to drive data lines in the display area simultaneously to lighten pixels in the display area; and performing a voltage tuning on the display area in which the pixels are lightened; wherein performing a gamma voltage tuning on the display area in which the pixels are lightened comprises: testing a picture brightness of the display area in which the pixels are lightened under different input voltages to determine a voltage-transmittance V-T curve of the display panel at the display area in which the pixels are lightened; obtaining an ideal gray scale-voltage L-V curve based on the determined voltage-transmittance V-T curve and a target gray scale-transmittance L-T curve, the target L-T curve is obtained by a curve relationship expression between gray scales and transmittances of set target gamma values; inputting a voltage value on the ideal L-V curve corresponding to an tunable gray scale of the display panel into the display panel, testing a brightness value of the display area in which the pixels are lightened under the tunable gray scale of the display panel and dividing the brightness value by a maximum brightness to obtain an actual L-T curve of the display area in which the pixels are lightened; and tuning the voltage values corresponding to respective tunable gray scales input to the display panel by using differences between the actual L-T curve and the target L-T curve until the differences between the actual L-T curve and the target L-T curve of the display area in which the pixels are lightened is within a set error range.