US 12,136,377 B2
Display panel driving device and display panel driving method
Minsung Kim, Suwon-si (KR); and Seung-Hoon Baek, Suwon-si (KR)
Assigned to Samsung Electronics Co., Ltd., Gyeonggi-do (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Dec. 5, 2022, as Appl. No. 18/061,588.
Claims priority of application No. 10-2022-0086979 (KR), filed on Jul. 14, 2022.
Prior Publication US 2024/0021129 A1, Jan. 18, 2024
Int. Cl. G09G 3/20 (2006.01)
CPC G09G 3/2007 (2013.01) [G09G 2310/061 (2013.01); G09G 2310/08 (2013.01); G09G 2320/0247 (2013.01); G09G 2320/0673 (2013.01); G09G 2330/021 (2013.01); G09G 2330/028 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A driving device of a display panel, the driving device comprising:
a reference voltage generator configured to generate a maximum gamma voltage and a minimum gamma voltage;
a capacitor circuit, the capacitor circuit including
a first end configured to receive an input of a first driving voltage or a second driving voltage,
a second end configured to receive an input of the maximum gamma voltage, and
a third end configured to receive an input of the minimum gamma voltage,
wherein the capacitor circuit is configured to
charge a first charge based on a voltage difference between the first driving voltage and the maximum gamma voltage and charge a second charge based on a voltage difference between the first driving voltage and the minimum gamma voltage, in response to receiving the first driving voltage via the first end, and
output a first gamma reference voltage and a second gamma reference voltage to the second end and the third end, respectively, in response to receiving the second driving voltage via the first end; and
a gamma voltage generator that is configured to generate a plurality of gamma voltages based on the first gamma reference voltage and the second gamma reference voltage,
wherein the first driving voltage is generated by a power supply, and the second driving voltage is generated by an integrated circuit (IC) that is separate from the power supply.