US 12,347,357 B2
Source driver, display driving device, and display device including the same
Barry Liu, Zhubei (TW); Skaut Su, Hsinchu (TW); and Donken Huang, Zhubei (TW)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Feb. 8, 2024, as Appl. No. 18/436,891.
Claims priority of application No. 10-2023-0135757 (KR), filed on Oct. 12, 2023.
Prior Publication US 2025/0124839 A1, Apr. 17, 2025
Int. Cl. G09G 3/20 (2006.01); G09G 3/3275 (2016.01); G09G 3/36 (2006.01)
CPC G09G 3/2007 (2013.01) [G09G 3/2096 (2013.01); G09G 3/3275 (2013.01); G09G 3/3685 (2013.01); G09G 2310/0243 (2013.01); G09G 2310/0286 (2013.01); G09G 2310/0289 (2013.01); G09G 2310/0291 (2013.01); G09G 2310/0297 (2013.01); G09G 2320/0673 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A source driver comprising:
a gamma voltage generator comprising:
a plurality of gamma amplifiers configured to output a plurality of tap gamma voltages; and
a first resistor string configured to divide the plurality of tap gamma voltages to generate a plurality of first gamma voltages;
a plurality of amplifier areas connected to a plurality of source lines;
a second resistor string configured to divide a maximum gamma voltage and a minimum gamma voltage and to generate a plurality of reference gamma voltages; and
a plurality of gamma decoders,
wherein the gamma voltage generator is configured to:
output the plurality of first gamma voltages during a first time period, and
output a second gamma voltage to the plurality of source lines during a second time period different from the first time period, wherein the gamma voltage generator is connected to the plurality of source lines during the second time period,
wherein each of the plurality of amplifier areas is configured to:
output a plurality of data signals based on the plurality of first gamma voltages during the first time period, and
be disabled during the second time period,
wherein each of the plurality of gamma decoders is configured to:
receive corresponding reference gamma voltages from among the plurality of reference gamma voltages, and
output one of the corresponding reference gamma voltages to a gamma amplifier among the plurality of gamma amplifiers based on a plurality of gamma voltage control signals, and
wherein a number of bits of the plurality of gamma voltage control signals input to the plurality of gamma decoders during the first time period and a number of bits of the plurality of gamma voltage control signals input to the plurality of gamma decoders during the second time period are substantially the same.