US 12,307,941 B1
Display device and control method thereof
Yaw-Guang Chang, Tainan (TW); Pei Yao Chang, Tainan (TW); Jhou-Pu Yang, Tainan (TW); and Chun-Yu Chiu, Tainan (TW)
Assigned to HIMAX TECHNOLOGIES LIMITED, Tainan (TW)
Filed by HIMAX TECHNOLOGIES LIMITED, Tainan (TW)
Filed on Apr. 24, 2024, as Appl. No. 18/644,102.
Int. Cl. G09G 3/32 (2016.01); G09G 3/20 (2006.01)
CPC G09G 3/2092 (2013.01) [G09G 2330/028 (2013.01); G09G 2330/06 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A display device, comprising:
a plurality of display area substrates, disposed in a display panel, wherein each of the display area substrates receives a gate line signal, a source line signal and a common voltage;
a common voltage generator, coupled to the display area substrates for generating the common voltage to each of the display area substrates; and
at least one AC voltage generator, coupled to the common voltage generator, for generating an adjusting voltage to the common voltage according to driving current information of a plurality of source drivers of the display device, wherein the adjusting voltage has an AC voltage level,
wherein the AC voltage generator generates a positive pulse on the adjusting voltage when sink current information of the driving current information is larger than source current information of the driving current information, and generates a negative pulse on the adjusting voltage when the sink current information is smaller than the source current information,
wherein the AC voltage generator comprises:
a first current source, coupled between a power source end and an output end of the AC voltage generator, and providing a source current to the output end of the AC voltage generator according to the sink current information; and
a second current source, coupled between a reference ground end and the output end of the AC voltage generator, and draining a sink current from the output end of the AC voltage generator according to the source current information.