US 12,451,097 B2
Gamma voltage control circuit, display apparatus including the same and electronic apparatus including the same
Hyunchang Kim, Yongin-si (KR); Se-Byung Chae, Yongin-si (KR); Subin Kim, Yongin-si (KR); and Sangmin Lee, Yongin-si (KR)
Assigned to Samsung Display Co., Ltd., Yongin-si (KR)
Filed by Samsung Display Co., Ltd., Yongin-Si (KR)
Filed on Sep. 18, 2023, as Appl. No. 18/369,210.
Claims priority of application No. 10-2022-0174177 (KR), filed on Dec. 13, 2022.
Prior Publication US 2024/0194163 A1, Jun. 13, 2024
Int. Cl. G09G 3/36 (2006.01); G09G 3/32 (2016.01); G09G 3/3258 (2016.01); G09G 3/3291 (2016.01)
CPC G09G 3/3696 (2013.01) [G09G 3/32 (2013.01); G09G 3/3258 (2013.01); G09G 3/3291 (2013.01); G09G 3/3688 (2013.01); G09G 2310/027 (2013.01); G09G 2310/0291 (2013.01); G09G 2320/0276 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A gamma voltage control circuit comprising:
a first amplifier configured to generate a first primitive reference voltage based on a panel power voltage applied to a display panel;
a second amplifier configured to generate a first reference voltage based on the first primitive reference voltage, the panel power voltage and an internal power voltage, and output the first reference voltage to a gamma reference voltage generator as a high reference voltage;
a resistor string including a first end configured to receive the panel power voltage; and
a first decoder connected to the resistor string and the first amplifier,
wherein the first amplifier is a first low dropout regulator.