US 12,266,291 B2
Display driver
Chanbong Yu, Suwon-si (KR); Yeongshin Jang, Suwon-si (KR); and Woonyoung Lee, Suwon-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Dec. 16, 2022, as Appl. No. 18/083,055.
Claims priority of application No. 10-2022-0047579 (KR), filed on Apr. 18, 2022; and application No. 10-2022-0079645 (KR), filed on Jun. 29, 2022.
Prior Publication US 2023/0335040 A1, Oct. 19, 2023
Int. Cl. G09G 3/20 (2006.01)
CPC G09G 3/2096 (2013.01) [G09G 2310/0291 (2013.01); G09G 2310/08 (2013.01); G09G 2320/0276 (2013.01); G09G 2330/028 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A display driver comprising:
a plurality of source amplifiers connected to a plurality of source lines of a display panel, wherein a first source amplifier of the plurality of source amplifiers comprises an input stage and an output stage configured to output a grayscale voltage to a source line of the plurality of source lines; and
a decoder circuit configured to provide at least one of a plurality of gamma voltages to the input stage based on image data,
wherein the output stage of the first source amplifier comprises a plurality of unit circuits connected to each other in parallel between the input stage of the first source amplifier and an output pad connected to the source line, and
wherein each of the plurality of unit circuits comprises a buffer switch and an output buffer connected to the input stage of the first source amplifier, and is connected to the output pad through a resistor.