公开(公告)号：US11615745B2

公开(公告)日：2023-03-28

申请号：US17700863

申请日：2022-03-22

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Seung Chan Lee ,  Beom Soo Park ,  Wang Jo Lee ,  Seong Jun Lee ,  Yoon Ah Choi

IPC: G09G3/20 ,  G09G3/3233 ,  H01L27/32 ,  H01L29/786

Abstract: A pixel includes: a driving transistor including a gate electrode coupled to a first node, a first electrode coupled to a second node, and a second electrode coupled to a third node; a first initialization transistor coupled between the first node and a first initialization voltage line, and including a gate electrode coupled to a scan line, where the first initialization voltage line is configured to supply a first initialization voltage; a first emission control transistor coupled between a fourth node and a fifth node and including a gate electrode coupled to the first node; a second emission control transistor coupled between the third node and the fifth node and including a gate electrode coupled to an emission control line; and a light-emitting element coupled between the fourth node and a driving low voltage line. The driving transistor and the first emission control transistor are different types of transistors.

公开(公告)号：US11380263B2

公开(公告)日：2022-07-05

申请号：US17254216

申请日：2019-05-22

Applicant: Samsung Display Co., LTD.

Inventor： Ju-Won Yoon ,  Gun Hee Kim ,  Sang Ho Park ,  Seung Chan Lee ,  Joo Hee Jeon

IPC: G09G3/3258 ,  G09G3/3291 ,  G09G3/3266 ,  H01L27/32 ,  H01L51/52 ,  G09G3/3233

Abstract: An organic light emitting diode display includes: a substrate; an overlapping layer on the substrate; a pixel on the substrate and the overlapping layer; and a scan line, a data line, a driving voltage line, and an initialization voltage line that are connected to the pixel. The pixel includes: an organic light emitting diode; a second transistor connected to the scan line and the data line; a driving transistor including a gate electrode, an input terminal, and an output terminal, and to apply a current to the organic light emitting diode from the output terminal; and a voltage application transistor to apply a voltage to the overlapping layer. An output of the second transistor is connected to the input terminal of the driving transistor, and the overlapping layer is between the driving transistor and the substrate while overlapping with the driving transistor on a plane.

公开(公告)号：US11341878B2

公开(公告)日：2022-05-24

申请号：US16821706

申请日：2020-03-17

Applicant: Samsung Display Co., LTD.

Inventor： Hyun Joon Kim ,  Jun Ki Jeong ,  Kyung Hoon Chung ,  Kyung Bae Kim ,  Seung Chan Lee ,  Chong Chul Chai

IPC: G09G3/00

Abstract: A method of testing a display panel including a pixel coupled to first, second, and third power lines, a data line, scan lines, an emission control line, and a test line, the method includes: applying a first power supply voltage to the first power line; applying a test voltage having a turn-on voltage level to the second power line; applying a scan signal having a turn-on voltage level sequentially to the scan lines and an emission control signal having a turn-on voltage level to the emission control line; applying a gate signal to the test line to turn on a test transistor coupled between two electrode of a light emitting element included in the pixel; measuring a sensing voltage output through the data line; and determining whether the pixel is defective, based on a voltage level of the measured sensing voltage.