US 11,657,776 B2
Driving method and drive circuit of display panel
Mingliang Wang, Chongqing (CN)
Assigned to HKC CORPORATION LIMITED, Shenzhen (CN)
Appl. No. 17/42,113
Filed by HKC CORPORATION LIMITED, Shenzhen (CN)
PCT Filed Dec. 13, 2018, PCT No. PCT/CN2018/120831
§ 371(c)(1), (2) Date Sep. 26, 2020,
PCT Pub. No. WO2020/113646, PCT Pub. Date Jun. 11, 2020.
Claims priority of application No. 201811465418.4 (CN), filed on Dec. 3, 2018.
Prior Publication US 2021/0012745 A1, Jan. 14, 2021
Int. Cl. G09G 3/36 (2006.01)
CPC G09G 3/3696 (2013.01) [G09G 2310/08 (2013.01); G09G 2320/0233 (2013.01); G09G 2320/0238 (2013.01); G09G 2320/0673 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A driving method of a display panel, comprising:
depending on a distance from a data driving chip, dividing the display panel into a plurality of charging regions in advance, assigning each charging region with a unique digital code, and storing a correspondence between each charging region and the respective digital code in a timing control chip in advance;
detecting a charging region where each pixel to be charged is located, and outputting a corresponding digital code according to the charging region by the timing control chip; and
receiving, by a gamma chip, the digital code and generating a gamma voltage corresponding to the digital code based on an input operating voltage to drive a charging operation of the charging region corresponding to the digital code;
wherein the display panel further comprises an operating voltage circuit configured to generate the operating voltage; the gamma chip comprises a reference voltage generation circuit and a gamma voltage generation circuit: wherein an input terminal of the reference voltage generation circuit is connected to the timing control chip and to the operating voltage circuit, and wherein an input terminal of the gamma voltage generation circuit is connected to the reference voltage generation circuit;
wherein the operation of receiving by the gamma chip the digital code from the timing control chip and generating a gamma voltage corresponding to the digital code based on an input operating voltage to drive a charging operation of the charging region corresponding to the digital code comprises: receiving, by the reference voltage generation circuit, the digital code from the timing control chip and generating a reference voltage corresponding to the digital code based on the input operating voltage;
wherein the driving method further comprises the following operations subsequent to the operation of receiving by the reference voltage generation circuit the digital code from the timing control chip and generating a reference voltage corresponding to the digital code based on the input operating voltage; receiving, by the gamma voltage generation circuit, the reference voltage and generating a gamma voltage corresponding to the digital code to drive the charging operation of the charging region corresponding to the digital code;
wherein the driving method further comprises the following operations subsequent to the operation of receiving by the gamma voltage generation circuit the reference voltage and generating a gamma voltage corresponding to the digital code to drive the charging operation of the charging region corresponding to the digital code; receiving, by the reference voltage generation circuit, the digital code from the timing control chip and multiplying the operating voltage by the digital code to obtain the reference voltage.