US 12,106,706 B2
Pixel of a display device, and display device
Minjae Jeong, Hwaseong-si (KR); Jangmi Kang, Seoul (KR); Hyeongseok Kim, Hwaseong-si (KR); Junhyun Park, Suwon-si (KR); and Mukyung Jeon, Ulsan (KR)
Assigned to Samsung Display Co., Ltd., Yongin-si (KR)
Filed by Samsung Display Co., Ltd., Yongin-Si (KR)
Filed on Jul. 20, 2023, as Appl. No. 18/224,079.
Application 18/224,079 is a continuation of application No. 17/674,107, filed on Feb. 17, 2022, granted, now 11,756,480.
Claims priority of application No. 10-2021-0117014 (KR), filed on Sep. 2, 2021.
Prior Publication US 2023/0360590 A1, Nov. 9, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G09G 3/32 (2016.01)
CPC G09G 3/32 (2013.01) [G09G 2300/0842 (2013.01); G09G 2310/0267 (2013.01); G09G 2310/0275 (2013.01); G09G 2310/061 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A pixel of a display device, the pixel comprising:
a first transistor including a first gate coupled to a first node, a first terminal, a second terminal coupled to a second node, and a second gate;
a second transistor including a gate coupled to a writing signal line, a first terminal coupled to a data line, and a second terminal coupled to the first node;
a storage capacitor coupled between the first node and the second node;
a sixth transistor including a first terminal coupled to the second gate of the first transistor;
a seventh transistor including a first terminal coupled to a bias voltage line, and a second terminal coupled to the second gate of the first transistor; and
a light emitting element coupled between the first transistor and a second power supply voltage line,
wherein each frame period of a plurality of frame periods for the pixel includes:
an initialization period in which the first node and the second node are initialized;
a compensation period in which a threshold voltage of the first transistor is compensated;
a data writing period in which a data voltage of the data line is written;
at least one bias period in which the second node is initialized and a bias voltage of the bias voltage line is applied to the second gate of the first transistor; and
at least one emission period in which the light emitting element emits light, and
wherein, in the compensation period, an initialization signal line and the writing signal line have a turn-off level, a reset signal line has a turn-on level to apply a reference voltage to the first node, an emission signal line has the turn-on level, and a voltage of the second node is saturated to a voltage corresponding to the threshold voltage subtracted from the reference voltage.