公开(公告)号：US20210312855A1

公开(公告)日：2021-10-07

申请号：US17078378

申请日：2020-10-23

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Minjae Jeong ,  Joonho Lee ,  Keechan Park ,  Kyunghoon Chung ,  Chongchul Chai

IPC: G09G3/32

Abstract: A display panel, a pixel circuit, and a display device are disclosed. The display panel includes sub-pixels and a driver driving the sub-pixels. Each sub-pixel includes: an emission element; a first transistor configured to generate a driving current; a constant current control circuit configured to receive a reference voltage and a bias voltage for setting a value of the driving current and including a first capacitor configured to store a first compensation voltage generated by adding a threshold voltage of the first transistor to a difference between the bias voltage and the reference voltage; and a pulse width control circuit configured to receive a data voltage used to determine an emission duration of the emission element and including a second transistor configured to control a pulse width of the driving current according to the data voltage and a second capacitor configured to store a second compensation voltage corresponding to a threshold voltage of the second transistor.

公开(公告)号：US11217154B2

公开(公告)日：2022-01-04

申请号：US17147768

申请日：2021-01-13

Applicant: SAMSUNG DISPLAY CO., LTD. ,  KONKUK UNIVERSITY INDUSTRIAL COOPERATION CORP

Inventor： Minjae Jeong ,  Keechan Park ,  Joonho Lee ,  Kyunghoon Chung ,  Chongchul Chai

IPC: G09G3/36 ,  H03K3/0233 ,  G09G3/32

Abstract: A display panel includes sub-pixels each including a light-emitting element and a pixel circuit including a first transistor and a second transistor; a timing control unit to generate bias data based on first characteristic information of the first transistor, and generate correction data based on second characteristic information of the second transistor; and a data sensing driving unit configured to receive the bias data and the correction data, and output a bias voltage and a grayscale voltage to the pixel circuit. The pixel circuit includes the first transistor to output a driving current to the light-emitting element; a first driving circuit to control a magnitude of the driving current based on the bias voltage; and a second driving circuit including the second transistor and configured to control a pulse width of the driving current based on the grayscale voltage.

公开(公告)号：US11373586B2

公开(公告)日：2022-06-28

申请号：US17078378

申请日：2020-10-23

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Minjae Jeong ,  Joonho Lee ,  Keechan Park ,  Kyunghoon Chung ,  Chongchul Chai

IPC: G09G3/32

Abstract: A display panel, a pixel circuit, and a display device are disclosed. The display panel includes sub-pixels and a driver driving the sub-pixels. Each sub-pixel includes: an emission element; a first transistor configured to generate a driving current; a constant current control circuit configured to receive a reference voltage and a bias voltage for setting a value of the driving current and including a first capacitor configured to store a first compensation voltage generated by adding a threshold voltage of the first transistor to a difference between the bias voltage and the reference voltage; and a pulse width control circuit configured to receive a data voltage used to determine an emission duration of the emission element and including a second transistor configured to control a pulse width of the driving current according to the data voltage and a second capacitor configured to store a second compensation voltage corresponding to a threshold voltage of the second transistor.