公开(公告)号：US12223901B2

公开(公告)日：2025-02-11

申请号：US18301726

申请日：2023-04-17

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Dae Youn Cho ,  Jong Woo Park ,  Jun Seok Oh ,  Yoon Suk Choi ,  Young Tae Choi

IPC: G09G3/32 ,  G09G3/3233 ,  G09G3/3258

Abstract: A pixel of a display device may pre-charge a light emitting element in non-emission periods immediately before emission periods by varying a voltage level of an initialization voltage. As a result, a luminance non-uniformity phenomenon that may occur as the result of a deterioration deviation of the light emitting element may be removed or reduced.

公开(公告)号：US11250775B2

公开(公告)日：2022-02-15

申请号：US16374675

申请日：2019-04-03

Applicant: Samsung Display Co., Ltd.

Inventor： Ju Hee Lee ,  Dae Youn Cho ,  Jong Woo Park ,  Young Tae Choi

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

Abstract: A display device includes a pixel, a first control pad, a second control pad, and a first dummy pad. The pixel may emit light with luminance corresponding to a data signal. Supply of the data signal to the pixel depends on a first control signal and a second control signal. The first control pad is connected to a first control line for supplying the first control signal. The second control pad is connected to a second control line for supplying the second control signal. The first dummy pad is positioned between the first control pad and the second control pad and may receive a first dummy signal. A voltage level of the first dummy signal is in a range from a voltage level of the first control signal to a voltage level of the second control signal.

公开(公告)号：USD904398S1

公开(公告)日：2020-12-08

申请号：US29680758

申请日：2019-02-19

Applicant: Samsung Display Co., Ltd.

Designer： Jong Woo Park ,  Ju Hee Lee ,  Dae Youn Cho ,  Young Tae Choi

公开(公告)号：US20190213958A1

公开(公告)日：2019-07-11

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.

公开(公告)号：US11665938B2

公开(公告)日：2023-05-30

申请号：US17101584

申请日：2020-11-23

Applicant: SAMSUNG DISPLAY CO., LTD.

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

IPC: H01L27/14 ,  H01L27/32 ,  H01L51/00 ,  H01L27/12

CPC classification number: H01L27/3276 ,  H01L27/3262 ,  H01L27/3265 ,  H01L51/0097 ,  H01L27/124 ,  H01L27/1218 ,  H01L27/1255 ,  H01L2251/5338

Abstract: A display apparatus includes a substrate; a lower conductive layer including a protective pattern and an auxiliary conductive pattern on the substrate; a buffer layer on the lower conductive layer; an active pattern on the buffer layer and overlapping the protective pattern; a first insulation layer on the active pattern; and a first conductive layer on the first insulation layer, the first conductive layer including a gate electrode overlapping the active pattern and a load matching line overlapping the auxiliary conductive pattern.

公开(公告)号：US11475835B2

公开(公告)日：2022-10-18

申请号：US17226817

申请日：2021-04-09

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：US11081063B2

公开(公告)日：2021-08-03

申请号：US16372927

申请日：2019-04-02

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

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：US11448550B2

公开(公告)日：2022-09-20

申请号：US17153678

申请日：2021-01-20

Applicant: Samsung Display Co., LTD.

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

IPC: G01J1/42 ,  G09G3/3275

Abstract: An optical measurement device includes an optical sensor which measures an optical waveform of a reference object or a measurement object, a learner which receives a first optical waveform of the reference object from the optical sensor and learns frequency characteristics of the first optical waveform, a filter generator which analyzes the frequency characteristics of the first optical waveform and generates a frequency filter, a frequency modeling unit which receives a second optical waveform of the measurement object from the optical sensor and models frequency characteristics of the second optical waveform, and an optical characteristic detector which calculates an optical characteristic index of the second optical waveform based on an output value of the frequency modeling unit and the frequency filter.

公开(公告)号：US11315482B2

公开(公告)日：2022-04-26

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: G09G3/30 ,  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：US20210256906A1

公开(公告)日：2021-08-19

申请号：US17226817

申请日：2021-04-09

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.