公开(公告)号：US11580908B2

公开(公告)日：2023-02-14

申请号：US17541717

申请日：2021-12-03

Applicant: LG DISPLAY CO., LTD.

Inventor： Kwanghun Jeon ,  Kimin Choi ,  HyoBin Choi

IPC: G09G3/3233

Abstract: Embodiments of the present disclosure are related to a driving circuit and a display device, by applying an initialization voltage to a sensing node between a driving transistor and a light-emitting element and sensing a voltage change of the sensing node according to driving the light-emitting element, a threshold voltage of the light-emitting element can be detected without turning-on the driving transistor. Furthermore, by turning on the driving transistor and falling a voltage of the sensing node before sensing the voltage of the sensing node, a voltage lower than the threshold voltage of the light-emitting element can be sensed and a variation of a characteristic value of the light-emitting element is detected, thus a circuit for sensing the characteristic value of the light-emitting element can be implemented easily.

公开(公告)号：US11864429B2

公开(公告)日：2024-01-02

申请号：US17536144

申请日：2021-11-29

Applicant: LG DISPLAY CO., LTD.

Inventor： Younghee Lee ,  HyunHaeng Lee ,  HyoBin Choi

IPC: H01L29/08 ,  H10K59/123 ,  H10K59/121 ,  G09G3/3266 ,  G09G3/3275 ,  H01L29/786 ,  G09G3/3233 ,  H01L27/12

CPC classification number: H10K59/123 ,  H10K59/1213 ,  H10K59/1216 ,  G09G3/3233 ,  G09G3/3266 ,  G09G3/3275 ,  G09G2300/0426 ,  G09G2300/0842 ,  G09G2310/08 ,  H01L27/1225 ,  H01L27/1255 ,  H01L29/7869

Abstract: A display panel of an organic light emitting display device includes a buffer layer disposed on a first conductive layer, and including a first contact hole, an active layer disposed on the buffer layer, and including an active pattern and a conductive pattern disposed on the active pattern, a first insulating film disposed on or over the active layer and the buffer layer, and including a second contact hole overlapping with the first contact hole, a second conductive layer disposed on the first insulating film, and contacting the first conductive layer through the first contact hole and the second contact hole, a plate disposed in the same layer as the second conductive layer, and spaced apart from the second conductive layer, and each of the first conductive layer, the active layer, and the plate serves as an electrode of a storage capacitor, thereby implementing a high-capacity storage capacitor for the display panel.