GAMMA VOLTAGE ADJUSTING CIRCUIT AND METHOD FOR DRIVER CHIP AS WELL AS AMOLED DISPLAY

摘要

A Gamma voltage adjusting circuit and Gamma voltage adjusting method for a driver chip and an AMOLED display. The Gamma adjusting circuit for the driver chip is provided with an analog-to-digital converting unit (12), a logic judging unit (13), a voltage adjusting unit (14) and a Gamma generating unit (15). The driver chip in the AMOLED display is connected with an ELVDD power supply line so as to input the voltage of the ELVDD power supply to the driver chip, and the analog-to-digital converting unit (12) converts the voltage signal to a digital signal; the logic judging unit (13) judges the change of the voltage of the ELVDD power supply on the basis of the digital signal and generates an adjusting signal; the voltage adjusting unit (14) generates a corresponding adjusting voltage; the Gamma generating unit (15) adjusts the Gamma voltage, so that the phenomena of the brightness variations of the display and the non-uniform display effect in each display area caused by the changes of the voltage of the ELVDD power supply are eliminated, and the display quality is improved.