US 12,431,077 B2
Display device and driving method thereof
Kyung Hwan Kim, Seongnam-si (KR); Sung Tak Yoon, Seongnam-si (KR); Shin Yoon, Seongnam-si (KR); and Chang Hee Shin, Seongnam-si (KR)
Assigned to DB GlobalChip Co., Ltd., Seongnam-si (KR)
Filed by DB GlobalChip Co., Ltd., Seongnam-si (KR)
Filed on Dec. 30, 2024, as Appl. No. 19/004,896.
Claims priority of application No. 10-2024-0002882 (KR), filed on Jan. 8, 2024.
Prior Publication US 2025/0225920 A1, Jul. 10, 2025
Int. Cl. G09G 3/32 (2016.01)
CPC G09G 3/32 (2013.01) [G09G 2330/021 (2013.01)] 35 Claims
OG exemplary drawing
 
1. A display device comprising:
a pixel array including n pixel groups, wherein n is a number of the n pixel groups;
a reference current source including a first reference transistor through which a reference current flows and connected to the pixel array;
n sub-current sources each included in the n pixel groups and each including a first transistor connected to the reference current source; and
n pixel circuits connected to the n sub-current sources, respectively,
wherein the reference current source includes any one of a second reference transistor and a reference resistor connected to the first reference transistor,
wherein each of the n sub-current sources is configured to provide a first mirroring current obtained by mirroring the reference current,
wherein each of the n pixel circuits is configured to provide a second mirroring current obtained by mirroring the first mirroring current,
wherein each of the n sub-current sources includes any one of an additional transistor and an additional resistor connected to the first transistor, and
wherein n is a natural number.