Patent ID: 9653036
Date: 2017-05-16
CPC Classifications: G09G

Claim:
1. A method for adjusting a gamma voltage, comprising: acquiring transmittance of a predetermined grayscale in accordance with a transmittance-grayscale curve of a display module T=(Gray/((2^n)−1))^ γ, wherein T represents the transmittance, Gray represents the grayscale, n represents a color level of the display module, and γ represents a gamma value of a standard gamma curve; acquiring a voltage of the predetermined grayscale in accordance with the transmittance of the predetermined grayscale and a voltage-transmittance curve of the display module; acquiring a voltage corresponding to the lowest transmittance and a voltage corresponding to the highest transmittance in accordance with the voltage-transmittance curve of the display module, and calculating a sum of the voltage corresponding to the lowest transmittance and the voltage corresponding to the highest transmittance, so as to obtain a center voltage of the display module; generating a to-be-adjusted gamma voltage in accordance with the voltage of the predetermined grayscale and the center voltage; applying a reference common electrode voltage and the to-be-adjusted gamma voltage to a display module; collecting first light intensity data when the display module displays a grayscale test pattern after the reference common electrode voltage and the to-be-adjusted gamma voltage are applied; plotting a testing gamma curve in accordance with the first light intensity data; judging whether or not the testing gamma curve is located within an acceptable range of a standard gamma curve; when the testing gamma curve is not located within the acceptable range of the standard gamma curve, adjusting the to-be-adjusted gamma voltage currently applied to the display module, until the testing gamma curve is located within the acceptable range of the standard gamma curve; and when the testing gamma curve is located within the acceptable range of the standard gamma curve, determining the to-be-adjusted gamma voltage currently applied to the display module as a final gamma voltage.