公开(公告)号：US11514855B2

公开(公告)日：2022-11-29

申请号：US17219729

申请日：2021-03-31

Applicant: Samsung Display Co., Ltd.

Inventor： Jaekeun Lim ,  Hongsoo Kim ,  Jinyoung Roh ,  Sehyuk Park ,  Hyojin Lee

IPC: G09G3/3258

Abstract: A display device includes a pixel, wherein the pixel includes a light emitting element, a first transistor connected to a first power line and the light emitting element and controlled by a voltage of a first node, a second transistor connected to a data line and the first transistor and controlled by an i-th scan signal, a third-first transistor connected to the first transistor and a second node and controlled by a first control signal, a third transistor connected to the second node and the first node and controlled by a second control signal, and a dummy transistor including a first electrode receiving a reference voltage, a second electrode connected to the second node, and a control electrode connected to an emission line.

公开(公告)号：US11468815B2

公开(公告)日：2022-10-11

申请号：US17548960

申请日：2021-12-13

Applicant: Samsung Display Co., Ltd.

Inventor： Sehyuk Park ,  Hongsoo Kim ,  Jaekeun Lim ,  Jinyoung Roh ,  Hyojin Lee

IPC: G09G3/20

Abstract: A display device includes a display panel including a first display region and a second display region surrounding the first display region, where a first pixel having a first size is disposed in the first display region, and a second pixel having a second size is disposed in the second display region, a gate driver which applies a gate signal to a gate line, a data driver which applies a data voltage to a data line, and a timing controller which controls the gate driver and the data driver. The gate line includes a first gate line connected to both the first pixel and the second pixel, and a second gate line connected only to the second pixel. The data line includes a first data line which does not transmit the data voltage to the second pixel connected to the second gate line, and a second data line which transmits the data voltage to the second pixel connected to the second gate line.

公开(公告)号：US11455958B2

公开(公告)日：2022-09-27

申请号：US17347468

申请日：2021-06-14

Applicant: Samsung Display Co., Ltd.

Inventor： Sehyuk Park ,  Hyojin Lee ,  Hui Nam ,  Jinyoung Roh ,  Bong Hyun You ,  Eunho Lee

IPC: G09G3/3275

Abstract: A display device includes: a display panel including a plurality of pixels; and a driving controller configured to: generate a data signal corresponding to an input image data; generate a data voltage based on the data signal; and output the data voltage to the pixels, wherein the driving controller is configured to output the data signal in at least one driving frequency higher than a predetermined low frequency during an image transition period in a low frequency driving mode during which the data signal outputs in the low frequency.

公开(公告)号：US11263980B2

公开(公告)日：2022-03-01

申请号：US16669521

申请日：2019-10-31

Applicant: Samsung Display Co., Ltd.

Inventor： Sehyuk Park ,  Hyojin Lee ,  Jinyoung Roh

IPC: G09G3/3291

Abstract: A display apparatus including a display panel, a gate driver, a data driver, an emission driver, and a driving controller. The display panel includes a pixel including a switching element of a first type and a switching element of a second type. The driving controller determines a driving frequency of the switching element of the first type to be a first driving frequency and a driving frequency of the switching element of the second type to be a second driving frequency less than the first driving frequency in a low frequency driving mode. The driving controller determines the second driving frequency based on a difference of a luminance of a writing frame in which the data voltage is written in the pixel and a luminance of a holding frame in which the written data voltage in the pixel is maintained without writing the data voltage.

公开(公告)号：US11049451B2

公开(公告)日：2021-06-29

申请号：US16888284

申请日：2020-05-29

Applicant: Samsung Display Co., Ltd.

Inventor： Sehyuk Park ,  Sangan Kwon ,  HongSoo Kim ,  Jinyoung Roh ,  Hyojin Lee

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

Abstract: A display device including: a controller including: a zone splitting block configured to divide input image data into a plurality of partial image data respectively corresponding to a plurality of partial panel zones of the display panel; a plurality of panel zone frequency deciding blocks configured to determine a plurality of driving frequencies for the plurality of partial panel zones by analyzing the plurality of partial image data, respectively; a non-driving period setting block configured to classify a plurality of frame periods into a driving frame period and a non-driving frame period based on a maximum driving frequency of the plurality of driving frequencies; and a scan driver control block configured to provide the scan driver input signal to the scan driver in the driving frame period, and to not provide the scan driver input signal to the scan driver in the non-driving frame period.

公开(公告)号：US20200219450A1

公开(公告)日：2020-07-09

申请号：US16737363

申请日：2020-01-08

Applicant: Samsung Display Co., Ltd.

Inventor： Hyojin Lee ,  Sehyuk Park ,  Jinyoung Roh ,  Geunjeong Park ,  Eunho Lee ,  Hui Nam ,  Bonghyun You

IPC: G09G3/3258 ,  G09G3/3266 ,  G09G3/3275

Abstract: A display device including: a display panel including a pixel connected to a first scan line, second scan line, and data line, the pixel including: a first switch connected to the first scan line; a second switch connected to the second scan line; and a light emitting element; a low-frequency driving controller to output a power control signal having a first level in a first mode and a second power control signal having a second level in a second mode; a scan driver including first and second scan drivers to drive the first and second scan lines, wherein one of the first and second scan drivers operates in the second mode; and a data driver to operate in the second mode in response to the power control signal having the second level, wherein the data driver operates at a frequency lower than a reference frequency in the second mode.

公开(公告)号：US11538407B2

公开(公告)日：2022-12-27

申请号：US16739875

申请日：2020-01-10

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Hyojin Lee ,  Eunho Lee ,  Jinyoung Roh ,  Sehyuk Park ,  Bong Hyun You

IPC: G09G3/3233 ,  H01L29/786 ,  G09G3/3258

Abstract: A display apparatus includes a display panel displaying an image based on input image data, a driving controller determining a low frequency driving mode and a normal driving mode based on the input image data, a gate driver outputting a gate signal, a data driver outputting a data voltage, and a power voltage generator outputting power voltages. The driving controller is configured to generate a writing frame in which data is written in a pixel of the display panel and a holding frame in which the written data is maintained without writing data in the pixel in the low frequency driving mode. The driving controller is configured to operate at least one of the driving controller, the data driver, and the power voltage generator in a power reducing mode during the holding frame.

公开(公告)号：US11410607B2

公开(公告)日：2022-08-09

申请号：US17306259

申请日：2021-05-03

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Jinyoung Roh ,  Hongsoo Kim ,  Sehyuk Park ,  Hyojin Lee ,  Jaekeun Lim

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

Abstract: An organic light emitting diode display device includes a display panel including a plurality of pixels, and a panel driver configured to drive the display panel. Each pixel includes a driving transistor, a compensating transistor including first and second compensating sub-transistors coupled in series between a gate node and a drain of the driving transistor, a storage capacitor, and an organic light emitting diode. The panel driver calculates an average representative gray level of input image data in a plurality of frame periods, determines a voltage level of a node controlling voltage based on the average representative gray level, and provides the node controlling voltage to each of the plurality of pixels to control a voltage of a node between the first and second compensating sub-transistors.

公开(公告)号：US11302259B2

公开(公告)日：2022-04-12

申请号：US17143191

申请日：2021-01-07

Applicant: Samsung Display Co., Ltd.

Inventor： Sehyuk Park ,  Hongsoo Kim ,  Jinyoung Roh ,  Bonghyun You ,  Hyojin Lee ,  Jaekeun Lim

IPC: G09G3/3266 ,  G09G3/3275

Abstract: A display apparatus includes a display panel, a gate driver, a data driver, a driving controller and a power voltage generator. The display panel displays an image based on input image data. The gate driver outputs a gate signal to a gate line. The data driver outputs a data voltage to a data line. The driving controller drives display areas of the display panel in different driving frequencies. The power voltage generator outputs a data power voltage to the data driver. The driving controller outputs an output data enable signal including a writing period having an active signal and a holding period having an inactive signal for the respective display areas. The power voltage generator generates the data power voltage having a high power voltage level during the writing period and a low power voltage level in at least a portion of the holding period.

公开(公告)号：US11282459B2

公开(公告)日：2022-03-22

申请号：US16914163

申请日：2020-06-26

Applicant: Samsung Display Co., Ltd.

Inventor： Sehyuk Park ,  Hyojin Lee ,  Sangan Kwon ,  Jinyoung Roh

IPC: G09G3/3258 ,  G09G3/3291

Abstract: A display apparatus includes a display panel, a gate driver, a data driver and a driving controller. The display panel displays an image based on input image data. The gate driver outputs a gate signal to a gate line of the display panel. The data driver outputs a data voltage to a data line of the display panel. The driving controller is configured to control an operation of the gate driver and an operation of the data driver, to determine a driving mode of the display apparatus among one of a normal driving mode and a low frequency driving mode, and to determine a driving frequency of the display panel based on the input image data. The driving controller includes a flicker value storage configured to store flicker values for a part of grayscale values among all of grayscale values of the input image data.