公开(公告)号：US11972726B2

公开(公告)日：2024-04-30

申请号：US17990813

申请日：2022-11-21

Applicant: Samsung Display Co., LTD.

Inventor： Byung Chang Yu ,  Hyun Joon Kim ,  Hae Min Kim ,  Myunghoon Park ,  Dong-Hoon Lee

IPC: G09G3/3233 ,  H10K59/131

CPC classification number: G09G3/3233 ,  G09G2300/0426 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2320/0626 ,  H10K59/131

Abstract: A light emitting display device includes a light emitting diode including a first electrode and a second electrode to which a driving voltage is applied, a driving transistor, a second transistor receiving a data voltage and connected to a D node, a storage capacitor connected to the driving transistor and an N node, a hold capacitor connected to the D node and the N node, a third transistor connected to the D node and the driving transistor, a fourth transistor receiving a reference voltage and connected to the driving transistor, a fifth transistor connected to the driving transistor and the N node, a sixth transistor receiving a driving low voltage and connected to the driving transistor, a seventh transistor receiving an initialization voltage and connected the driving transistor, and an eighth transistor connected to the driving transistor and the first electrode of the light emitting diode.

公开(公告)号：US11961822B2

公开(公告)日：2024-04-16

申请号：US18062927

申请日：2022-12-07

Applicant: Samsung Display Co., LTD.

Inventor： Hyun Joon Kim ,  Jung Hwan Hwang ,  Kye Uk Lee ,  Sang Jin Jeon

IPC: H01L25/065 ,  G09G3/3233 ,  H01L21/66 ,  H01L23/00 ,  H01L25/075 ,  H01L27/12

CPC classification number: H01L25/0655 ,  G09G3/3233 ,  H01L25/0753 ,  H01L27/1248 ,  H01L27/127 ,  G09G2300/026 ,  G09G2300/0426 ,  G09G2300/0819 ,  G09G2300/0852 ,  H01L22/22 ,  H01L22/32 ,  H01L24/05 ,  H01L24/16 ,  H01L27/1218 ,  H01L2224/05573 ,  H01L2224/16227 ,  H01L2924/12041

Abstract: A display device includes a substrate including a plurality of emission areas respectively corresponding to a plurality of subpixels for displaying an image, a plurality of light emitting elements respectively located in the plurality of emission areas of a first surface of the substrate and respectively corresponding to the plurality of subpixels, a first planarization layer on the first surface of the substrate and covering the plurality of light emitting elements, and an array layer on the first planarization layer.

公开(公告)号：US11922871B2

公开(公告)日：2024-03-05

申请号：US17388086

申请日：2021-07-29

Applicant: Samsung Display Co., LTD.

Inventor： Hae Min Kim ,  Min Jae Jeong ,  Jang Mi Kang ,  Hyun Joon Kim ,  Jun Hyun Park ,  Cheol-Gon Lee

IPC: G09G3/3233

CPC classification number: G09G3/3233 ,  G09G2300/0842 ,  G09G2310/0243 ,  G09G2310/0281 ,  G09G2310/08

Abstract: An emissive display device includes a display area which includes a plurality of pixels, and a driver disposed at a side of the display area, where the driver includes at least two emission signal stages disposed in one row, and an input signal line connected to the emission signal stages, and the at least two emission signal stages are connected to the same input signal line.

公开(公告)号：US11887525B2

公开(公告)日：2024-01-30

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 ,  G09G2300/0426 ,  G09G2300/0819 ,  G09G2310/027 ,  G09G2310/08 ,  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：US11875743B2

公开(公告)日：2024-01-16

申请号：US17875601

申请日：2022-07-28

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Min Jae Jeong ,  Jun Hyun Park ,  Hyun Joon Kim ,  Kyung Hoon Chung ,  Jang Mi Kang ,  Hae Min Kim

IPC: G09G3/3233 ,  G09G3/3266 ,  G09G3/3275 ,  G09G3/32

CPC classification number: G09G3/3233 ,  G09G3/3266 ,  G09G3/3275 ,  G09G3/32 ,  G09G2300/0426 ,  G09G2300/0819 ,  G09G2310/08 ,  G09G2320/0247 ,  G09G2320/0257 ,  G09G2330/021

Abstract: A pixel including: a light emitting element; a first transistor connected between a first power source and a second node; a first capacitor connected to a first node or a second node and a third node; a second transistor between the third node and a data line, the second transistor turned on by a first scan signal; a third transistor between the first and second nodes, the third transistor turned on by a second scan signal; a fifth transistor between the first power source and the first transistor, the fifth transistor turned on by a first emission control signal; a sixth transistor between the second node and the light emitting element, the sixth transistor turned on by a second emission control signal; and an eighth transistor between the second node and a second emission control line, the eighth transistor turned on by a fourth scan signal.

公开(公告)号：US11869415B2

公开(公告)日：2024-01-09

申请号：US17719930

申请日：2022-04-13

Applicant: Samsung Display Co., LTD.

Inventor： Hyun Joon Kim ,  Jung Hwan Hwang ,  Kyung Hoon Chung ,  Jun Ki Jeong

IPC: G09G3/32 ,  H03K17/687

CPC classification number: G09G3/32 ,  H03K17/6871 ,  G09G2310/0286 ,  G09G2310/08 ,  G09G2320/064

Abstract: A sweep signal driver includes: a kth stage to output a kth emission signal to a kth emission line, and a kth sweep signal to a kth sweep signal line, the kth stage including: first, second, and third pull-up nodes; a node connection circuit between the first pull-up node and the second pull-up node, and between the first pull-up node and the third pull-up node; a first output circuit to output a sweep clock signal of a sweep clock terminal to a first output terminal connected to the kth sweep signal line when the third pull-up node has a gate-on voltage; and a second output circuit to output a gate-on voltage to a second output terminal connected to the kth emission line when the second pull-up node has a gate-on voltage. A pulse of the kth sweep signal linearly changes from a gate-off voltage to the gate-on voltage.

公开(公告)号：US11837156B2

公开(公告)日：2023-12-05

申请号：US17807690

申请日：2022-06-17

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：US11694627B2

公开(公告)日：2023-07-04

申请号：US17569058

申请日：2022-01-05

Applicant: Samsung Display Co., LTD.

Inventor： Hyun Joon Kim

IPC: G09G3/3266 ,  G09G3/3275

CPC classification number: G09G3/3266 ,  G09G3/3275 ,  G09G2310/0264 ,  G09G2310/0286 ,  G09G2310/0291 ,  G09G2310/08

Abstract: A scan driver includes stages, each of the stages receiving first and second clock signals having a first low level as an active level, and a third clock signal having a high level as the active level. Each of the stages includes a logic circuit that changes a voltage of a first node to the first low level based on an input signal and the first clock signal, and changes a voltage of the first node to a second low level lower than the first low level based on the second clock signal, a first output buffer that outputs, as an active-low scan signal, the second clock signal in response to the voltage of the first node, and a second output buffer that outputs, as an active-high scan signal, the third clock signal in response to the voltage of the first node.

公开(公告)号：US11688331B2

公开(公告)日：2023-06-27

申请号：US17849299

申请日：2022-06-24

Applicant: Samsung Display Co., LTD.

Inventor： Jung Hwan Hwang ,  Hyun Joon Kim ,  Kye Uk Lee ,  Sang Jin Jeon ,  Jun Ki Jeong

IPC: G09G3/22 ,  G09G3/3208 ,  G09G3/3241 ,  G09G3/3233 ,  G09G3/36

CPC classification number: G09G3/22 ,  G09G3/3208 ,  G09G3/3233 ,  G09G3/3241 ,  G09G3/3648 ,  G09G2330/025 ,  G09G2330/028

Abstract: A display device includes: a first pixel driver to generate a control current; a second pixel driver to generate a driving current, and control a period during which the driving current flows, based on the control current; and a light-emitting element connected to the second pixel driver to receive the driving current. The first pixel driver includes: a first transistor to generate the control current based on a first data voltage; and a second transistor to provide the first data voltage to a first electrode of the first transistor based on a scan write signal from a scan write line. The second pixel driver includes: a third transistor to generate the driving current based on the control current; and a fourth transistor to provide a second data voltage to a first electrode of the third transistor based on a scan write signal from the scan write line.

公开(公告)号：US11562682B2

公开(公告)日：2023-01-24

申请号：US16924050

申请日：2020-07-08

Applicant: Samsung Display Co., Ltd.

Inventor： Hyun Joon Kim ,  Kyung Hoon Chung

IPC: G09G3/32

Abstract: A pixel circuit includes: a first transistor including a gate electrode connected to a first node, a source electrode connected to a first power line, and a drain electrode connected to a second power line; a light emitting element connected between the first transistor and the first or second power line; a second transistor connected between a data line and the first node, and including a gate electrode connected to a first scan line; a first capacitor connected between the first node and the source electrode of the first transistor; a third transistor connected between the first node and the first power line, and including a gate electrode connected to a second node; a fourth transistor connected between the second node and the data line, and including a gate electrode connected to a second scan line; and a second capacitor connected between the second node and a first control line.