公开(公告)号：US20240112626A1

公开(公告)日：2024-04-04

申请号：US18528761

申请日：2023-12-04

Applicant: Samsung Display Co., LTD.

Inventor： Jung Hwan HWANG ,  Hyun Joon KIM ,  Kye Uk LEE ,  Sang Jin JEON ,  Jun Ki JEONG

IPC: G09G3/32

CPC classification number: G09G3/32 ,  G09G2320/0633

Abstract: A display device includes a scan write line, a PWM emission line, a PAM emission line, a sweep signal line, a first data line, a second data line, and a subpixel connected thereto, and including a light emitting element, a first pixel driver to supply a control current to a node according to the first data voltage in response to the PWM emission signal, a second pixel driver to generate a driving current according to the second data voltage in response to the PWM emission signal, and a third pixel driver to supply the driving current to the light emitting element according to the PAM emission signal and a voltage of the node, wherein the PWM emission signal includes a plurality of PWM pulses, the PAM emission signal includes a plurality of PAM pulses, and a number of the PWM pulses is greater than a number of the PAM pulses.

公开(公告)号：US20230154372A1

公开(公告)日：2023-05-18

申请号：US17810141

申请日：2022-06-30

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Jung Hwan HWANG ,  Hyun Joon KIM ,  Kye Uk LEE ,  Jun Ki JEONG

IPC: G09G3/20 ,  G09G3/32

CPC classification number: G09G3/2011 ,  G09G3/32 ,  G09G2310/08 ,  G09G2310/027 ,  G09G2300/0819 ,  G09G2300/0426 ,  G09G2320/0242

Abstract: A display device includes PAM data lines receiving PAM and PWM data voltages, and sub-pixels connected to the PAM and PWM data lines. A sub-pixel includes a light emitting element, a first pixel driver to supply a control current according to one of the PAM data voltages to a node, a second pixel driver to generate a driving current according to one of the PWM data voltages, and a third pixel driver to adjust a period during which the driving current is supplied to the light emitting element according to a voltage of the node. A peak current value of the driving current when the sub-pixel emits a light corresponding to a low gray level region is smaller than a peak current value of the driving current when the sub-pixel emits a light corresponding to a high gray level region higher than the low gray level region.

公开(公告)号：US20230120477A1

公开(公告)日：2023-04-20

申请号：US17941990

申请日：2022-09-09

Applicant: Samsung Display Co., LTD.

Inventor： Jung Hwan HWANG ,  Hyun Joon KIM ,  Kye Uk LEE ,  Jun Ki JEONG ,  Sang Jin JEON

IPC: G09G3/32

Abstract: A display device includes connection lines, pulse amplitude modulation (PAM) data lines configured to receive pulse width modulation (PWM) data voltages, PWM data lines configured to receive the PWM data voltages, a first connection control line configured to receive a first connection control signal, a second connection control line configured to receive a second connection control signal, subpixels connected to the PWM data lines and the PAM data lines, and a first demultiplexer (demux) unit configured to connect the connection lines to the PAM data lines or to the PWM data lines according to the first connection control signal and the second connection control signal.

公开(公告)号：US20220310671A1

公开(公告)日：2022-09-29

申请号：US17519485

申请日：2021-11-04

Applicant: Samsung Display Co., Ltd.

Inventor： Seon Young CHOI ,  Jae Hyung CHO ,  Jee Hoon SIM ,  Jun Ki JEONG

IPC: H01L27/12

Abstract: An embodiment of a display device includes a substrate, a semiconductor layer, a first gate insulating layer, a gate electrode, a second gate insulating layer, a first storage electrode, a first interlayer insulating layer, a second interlayer insulating layer, a data line, and a driving voltage line. The semiconductor layer is disposed on the substrate. The first gate insulating layer is disposed on the semiconductor layer. The gate electrode is positioned on the first insulating layer. The second gate insulating layer is disposed on the gate electrode. The first storage electrode is positioned on the second gate insulating layer. The first interlayer insulating layer is disposed on the first storage electrode and has an opening surrounding the semiconductor layer, the gate electrode, and the first storage electrode. The second interlayer insulating layer is disposed on the first interlayer insulating layer and fills the opening. The data line and the driving voltage line are positioned on the second interlayer insulating layer. The semiconductor layer, the gate electrode, and the storage electrode are included in a pixel region. The display device includes a plurality of pixel regions. The data line and the driving voltage line cross the pixel circuit region. A portion of the semiconductor layer is in contact with the second interlayer insulating that fills the opening.

公开(公告)号：US20220277677A1

公开(公告)日：2022-09-01

申请号：US17749690

申请日：2022-05-20

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.

公开(公告)号：US20200302840A1

公开(公告)日：2020-09-24

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.