公开(公告)号：US12067942B2

公开(公告)日：2024-08-20

申请号：US18085260

申请日：2022-12-20

Applicant: Samsung Display Co., Ltd.

Inventor： Wonjun Lee ,  Cholho Kim ,  Mihyeon Jo

IPC: G09G3/3233 ,  G06V40/13

CPC classification number: G09G3/3233 ,  G06V40/1318 ,  G09G2300/0426 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2310/08 ,  G09G2354/00

Abstract: A display device includes a plurality of pixels, each of which includes a light emitting element and a pixel driving circuit and a plurality of sensors, each of which includes a light receiving element and a sensor driving circuit. The sensor driving circuit includes a first reset transistor, a second reset transistor, a sensing capacitor, an amplification transistor, and an output transistor. The first reset transistor includes a first electrode receiving a reset voltage, a second electrode connected to a first sensing node, and a third electrode receiving a reset control signal. The second reset transistor includes a first electrode receiving the reset voltage, a second electrode connected to a second sensing node, and a third electrode receiving the reset control signal. The sensing capacitor is positioned between the first sensing node and the second sensing node.

公开(公告)号：US11538422B2

公开(公告)日：2022-12-27

申请号：US17463518

申请日：2021-08-31

Applicant: Samsung Display Co., LTD.

Inventor： Wonjun Lee ,  Mihyeon Jo ,  Cholho Kim

IPC: G09G3/3291 ,  G09G3/3266 ,  G09G3/3233

Abstract: A pixel of a light emitting display device includes: a switching transistor which transfers a data voltage in response to a gate writing signal, a storage capacitor which stores a storage voltage, a driving transistor which generates a driving current based on the storage voltage stored in the storage capacitor, an emission transistor which selectively forms a path of the driving current in response to an emission signal, a light emitting diode which emits light based on the driving current, and a diode initialization transistor which transfers an initialization voltage to the light emitting diode in response to the emission signal. The storage voltage corresponds to a value obtained by subtracting a threshold voltage of the driving transistor from the data voltage.