Patent ID: 9564076
Date: 2017-02-07
CPC Classifications: G09G

Claim:
1. An array substrate, wherein the array substrate comprises: an active area, comprising a plurality of display pixel units; a source driver, being located outside the active area and providing drive signals to the display pixel units; a gamma voltage generating circuit, providing a gamma reference voltage to the source driver, and the gamma voltage generating circuit is inputted with a PWM signal from the pulse generating circuit TCon and obtains the gamma reference voltage for outputting the gamma reference voltage to the source driver according to the PWM signal; wherein the array substrate further comprises the pulse generating circuit, coupled to the gamma voltage generating circuit, and the pulse generating circuit comprises a pulse modulation sub circuit, and the gamma voltage generating circuit is coupled to the pulse modulation sub circuit; wherein the gamma voltage generating circuit comprises a shift register, an OR gate sub circuit, a charging sub circuit, a sampling hold sub circuit which are sequentially coupled, in series; the shift register is additionally coupled to the charging sub circuit and the sampling hold sub circuit; a switch is coupled, in series, between the OR gate sub circuit and the charging sub circuit and is also coupled to a power source; and the sampling hold sub circuit is coupled to the source driver, wherein the shift register expands a series PWM signal into multiple parallel PWM signals, and the sampling hold sub circuit stabilizes the gamma reference voltage and outputs the gamma reference voltage to the source driver, wherein the gamma voltage generating circuit is connected to the source driver through one of a thin film transistor on the array substrate and a connection pattern printed on the array substrate; and wherein the charging sub circuit comprises a plurality of capacitors and the multiple parallel PWM signals are integrated to provide a plurality of control signals of various widths respectively corresponding to the plurality of capacitors, the control signals being applied to control selective charging of the plurality of capacitors, respectively, such that the plurality of capacitors are respectively charged to different levels of potential.