公开(公告)号：US11087653B2

公开(公告)日：2021-08-10

申请号：US16522279

申请日：2019-07-25

Applicant: Samsung Display Co., Ltd.

Inventor： Dae Youn Cho ,  Hyunho Kim ,  Hyojung Kim ,  Young-Joo Noh ,  Jongwoo Park ,  Ju Hee Lee ,  Jinwoo Chae ,  Youngtae Choi

IPC: G09G3/00 ,  G01R31/26 ,  G09G3/20 ,  G09G3/3225

Abstract: An inspection system for a display cell having a display part and a plurality of data lines connected to first and second pixel units of the display part. An array test part and a lighting test part are located in a peripheral area around the display part. An inspection apparatus is configured to provide the array test part with an array control signal to block an array data signal from being applied to a plurality of data lines in a period in which a white image is displayed and to provide the lighting test part with a lighting control signal to block a lighting data signal from being applied to a plurality of data lines during a period in which a black image is displayed, during a drive reliability test mode for displaying a test image including the black image and the white image.

公开(公告)号：US20200327850A1

公开(公告)日：2020-10-15

申请号：US16813982

申请日：2020-03-10

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Dae Youn Cho ,  Ji Ho Moon ,  Jong Woo Park ,  Young Tae Choi

IPC: G09G3/32

Abstract: A pixel includes a light emitting device, a first transistor for controlling an amount of current flowing from a first power source to a second power source via the light emitting device, in response to a voltage applied to a first node, a second transistor coupled between a data line and a second node corresponding to a first electrode of the first transistor, and including a gate electrode coupled to a first scan line, a third transistor coupled between the first node and a third node corresponding to a second electrode of the first transistor, and including a gate electrode coupled to the first scan line, and a fourth transistor coupled between the third transistor and the third node, and configured to maintain a turn-on state.

公开(公告)号：US12046199B2

公开(公告)日：2024-07-23

申请号：US18066981

申请日：2022-12-15

Applicant: Samsung Display Co., LTD.

Inventor： Dae Youn Cho ,  Jong Woo Park ,  Sang Kil Kim ,  Ji Ho Moon ,  Young Tae Choi

IPC: G09G3/3233

CPC classification number: G09G3/3233 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2300/0861 ,  G09G2310/0202 ,  G09G2310/08 ,  G09G2320/0233 ,  G09G2320/043 ,  G09G2320/045 ,  G09G2330/028

Abstract: A pixel including: a light emitting element; a first transistor connected between a first node and a second node, and to generate a driving current to flow from a first power line to a second power line through the light emitting element; a second transistor connected between a data line and the first node; a third transistor connected between the second node and a third node corresponding to a gate electrode of the first transistor; a fourth transistor connected between the third node and a third power line; a fifth transistor connected between the first power line and the first node; a sixth transistor connected between the second node and a fourth node corresponding to a first electrode of the light emitting element; a seventh transistor connected between the fourth node and a fourth power line; and an eighth transistor connected between the fourth node and a fifth power line.

公开(公告)号：US11870020B2

公开(公告)日：2024-01-09

申请号：US17076009

申请日：2020-10-21

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Ha Yeon Shin ,  Jong Woo Park ,  Dae Youn Cho ,  Young Tae Choi

IPC: H01L33/54 ,  G09G3/20 ,  H01L33/56 ,  H10K19/00 ,  H10K50/80

CPC classification number: H01L33/54 ,  G09G3/20 ,  H01L33/56 ,  H10K19/00 ,  H10K50/80 ,  G09G2320/028 ,  G09G2320/068

Abstract: A display device may include a substrate. A first light emitting element is disposed on the substrate. A second light emitting element is disposed on the substrate and is positioned adjacent to the first light emitting element. A first encapsulation layer is disposed on the first light emitting element and the second light emitting element. A light path control layer is disposed on the first encapsulation layer. The light path control layer includes a first pattern overlapping the first light emitting element and having a first refractive index and a second pattern overlapping the second light emitting element and having a second refractive index that is greater than the first refractive index.

公开(公告)号：US11605355B2

公开(公告)日：2023-03-14

申请号：US17372929

申请日：2021-07-12

Applicant: Samsung Display Co., Ltd.

Inventor： Dae Youn Cho ,  Sang Kil Kim ,  Hyo Jung Kim ,  Jong Woo Park ,  Dong Gi Ahn ,  Jong Won Lee ,  Ju Hee Lee ,  Young Tae Choi

IPC: G09G3/00 ,  G09G3/3291 ,  G09G3/3266 ,  G09G3/3233 ,  G09G3/20 ,  H01L27/32 ,  H01L51/50

Abstract: An organic light emitting display device includes scan lines arranged in horizontal lines, data lines intersecting the scan lines, a pixel array including pixels coupled to the scan lines and the data lines, the pixels including at least first color pixels, a panel tester including switching elements coupled to first ends of the data lines, the switching elements including at least first and second switching elements, and a first line coupled to the first switching elements and a second line coupled to the second switching elements. Data lines of K-th to (K+L)-th (where K and L are natural numbers) first color pixels arranged in a predetermined horizontal line are coupled to the first line through the first switching elements, and data lines of at least a part of remaining first color pixels arranged in the predetermined horizontal line are coupled to the second line through the second switching elements.

公开(公告)号：US11217130B2

公开(公告)日：2022-01-04

申请号：US16507225

申请日：2019-07-10

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Jiho Moon ,  Dae Youn Cho ,  Jongwoo Park ,  Ju Hee Lee ,  Youngtae Choi

IPC: G09G3/00 ,  H01L27/32 ,  G09G3/3225

Abstract: A wiring-disconnection detecting circuit includes a low-power voltage supply, a monitoring wiring, and a wiring-disconnection determiner. The low-power voltage supply supplies a low-power voltage to a low-power voltage wiring that extends along a periphery of a display panel in a normal operating mode of the display panel and supplies a test voltage to the low-power voltage wiring in a wiring-disconnection detecting mode of the display panel. The monitoring wiring includes a first end connected to one point of the low-power voltage wiring and a second end at which a feedback voltage corresponding to the test voltage is output in the wiring-disconnection detecting mode. The wiring-disconnection determiner receives the feedback voltage from the second end, measures an RC delay of the feedback voltage, and determines that the low-power voltage wiring is disconnected when the RC delay is larger than a predetermined reference value.

公开(公告)号：US11017719B2

公开(公告)日：2021-05-25

申请号：US16567578

申请日：2019-09-11

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Hyo Jung Kim ,  Tae Young Kim ,  Yong Sung Park ,  Jong Woo Park ,  Mi Seon Seo ,  Keun Soo Lee ,  Ki Ju Im ,  Dae Youn Cho ,  Young Tae Choi ,  Hyun Cheol Hwang

IPC: G09G3/3233 ,  H01L27/32

Abstract: A display device includes a plurality of pixels. Each pixel includes a first transistor that controls an amount of current received from a first power supply voltage line connected via a second node to an organic light emitting diode in response to a voltage of a first node, a second transistor connected between a data line and the second node and that includes a first gate electrode connected to a first scan line, a light emitting line connected to a gate electrode of at least one light emitting transistor located in a current path between the first power supply voltage line and the organic light emitting diode, and a seventh transistor connected between one of at least one second gate electrode of the second transistor and the light emitting line. Accordingly, a threshold voltage of a switching transistor included in each of the plurality of pixels may be negatively shifted.

公开(公告)号：US10854143B2

公开(公告)日：2020-12-01

申请号：US16240515

申请日：2019-01-04

Applicant: Samsung Display Co., Ltd.

Inventor： Dae Youn Cho ,  Tae Young Kim ,  Hee Jin Kim ,  Jong Woo Park ,  Young Tae Choi

IPC: G09G3/3291 ,  G09G3/3266 ,  G09G3/3233 ,  G09G3/3258 ,  H01L27/32

Abstract: An organic light-emitting display device includes a display unit having a plurality of pixel units. The display device also includes a timing controller for calculating a black bias pixel ratio (BBPR) of the display unit based on image signals provided by an external source and for generating a control signal based on the BBPR. The BBPR is the ratio of a number of pixel units in a black state to a total number of pixel units. A power supply unit provides a driving voltage to the display unit based on the control signal from the timing controller, wherein the power supply unit provides a first driving voltage to the display unit when the BBPR is less than a reference value and provides a second driving voltage, which is higher than the first driving voltage, otherwise.