公开(公告)号：US11942030B1

公开(公告)日：2024-03-26

申请号：US18303396

申请日：2023-04-19

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Hae Kwan Seo ,  Bon Seog Gu ,  Jin Young Roh ,  Jae Keun Lim

IPC: G09G3/32 ,  G09G3/20

CPC classification number: G09G3/32 ,  G09G3/2096 ,  G09G2300/0426 ,  G09G2300/0842 ,  G09G2310/0202 ,  G09G2310/027 ,  G09G2310/0291 ,  G09G2310/0297 ,  G09G2310/08

Abstract: A source driver includes a digital-to-analog converter that converts signals corresponding to first and second colors included in digital image data into first and second analog color data voltages, respectively, an output buffer unit including a first output buffer that alternately outputs the first color data voltage and the second color data voltage during one horizontal period, and a controller that controls the digital-to-analog converter and the first output buffer to alternately output the first color data voltage and the second color data voltage corresponding to each horizontal period for each horizontal period. The controller controls the first output buffer such that the second color data voltage is output after the first color data voltage is first output during a first horizontal period, and the first color data voltage is output after the second color data voltage is first output during a subsequent second horizontal period.

公开(公告)号：US11462170B2

公开(公告)日：2022-10-04

申请号：US17008366

申请日：2020-08-31

Applicant: Samsung Display Co., Ltd.

Inventor： Jae Keun Lim ,  Jin Young Roh ,  Sehyuk Park ,  Hyo Jin Lee

IPC: G09G3/3266 ,  G11C19/18 ,  G09G3/3258 ,  G09G3/3275 ,  G09G3/36 ,  G09G3/3233 ,  G11C19/28

Abstract: A scan driver includes: a plurality of first stages configured to sequentially output a plurality of intermediate scan signals based on a scan start signal; a plurality of masking transistors respectively connected to a plurality of output terminals of the plurality of first stages, and configured to selectively transfer the plurality of intermediate scan signals in response to a masking signal, respectively; and a plurality of second stages including a plurality of input terminals respectively connected to the plurality of masking transistors, and configured to selectively output a plurality of scan signals based on the plurality of intermediate scan signals selectively transferred by the plurality of masking transistors.

公开(公告)号：US11423834B2

公开(公告)日：2022-08-23

申请号：US17142131

申请日：2021-01-05

Applicant: Samsung Display Co., Ltd.

Inventor： Se Hyuk Park ,  Hong Soo Kim ,  Jin Young Roh ,  Hyo Jin Lee ,  Jae Keun Lim

IPC: G09G3/3291 ,  G09G3/3266 ,  G09G3/20 ,  G09G3/3233

Abstract: A display device includes: a pixel configured to display an image based on image data and a reference voltage; a controller configured to generate reference voltage data corresponding to the reference voltage for restraining leakage current in the pixel based on a frame frequency; and a power supply configured to generate the reference voltage based on the reference voltage data and supply the reference voltage to the pixel.

公开(公告)号：US11367379B1

公开(公告)日：2022-06-21

申请号：US17409865

申请日：2021-08-24

Applicant: Samsung Display Co., Ltd.

Inventor： Se Hyuk Park ,  Jae Keun Lim ,  Hong Soo Kim ,  Jin Young Roh ,  Hyo Jin Lee

IPC: G09G3/20

Abstract: A display device according to an embodiment of the disclosure includes a timing controller, a scan driver including a plurality of stages connected to a plurality of clock signal lines and generating a plurality of scan signals in response to the scan start signal, a data driver configured to generate a plurality of data signals based on the image data, and a pixel portion including a plurality of pixels. One stage in the scan driver transmits a carry signal to 2n-th next stage. The timing controller selects any one of a normal frequency and low frequencies lower than the normal frequency as a driving frequency based on the input image data, and adjusts a clock duty of the plurality of clock signals so that a time required to output all of the plurality of scan signals during one frame is constant irrespective of the driving frequency.

公开(公告)号：US10997923B2

公开(公告)日：2021-05-04

申请号：US16695927

申请日：2019-11-26

Applicant: Samsung Display Co., Ltd.

Inventor： Jae Keun Lim ,  Jun Yong Song ,  Jeonkyoo Kim

IPC: G09G3/3266 ,  G09G3/3258

Abstract: A scan driver includes a charging part configured to charge a next scan signal in response to a sensing selection signal in an active period of a frame period, and an output control part configured to output the second clock signal in response to a voltage charged in the charging part in a vertical blank period of the frame period.

公开(公告)号：US09842537B2

公开(公告)日：2017-12-12

申请号：US14991900

申请日：2016-01-08

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Jae Keun Lim ,  Jong Hee Kim ,  Chong Chul Chai

IPC: G09G3/32 ,  G09G3/3225

CPC classification number: G09G3/3225 ,  G09G2300/0876 ,  G09G2310/0216 ,  G09G2310/08 ,  G09G2320/045

Abstract: A display device includes: a display unit including a plurality of pixels, each of the pixels including: an OLED; and a driving transistor to supply current to an anode of the OLED according to a voltage applied to a gate of the driving transistor and a power supply voltage; a scan driver to supply scan signals to the pixels; an initialization driver to supply initializing signals to the pixels; a data driver to supply data signals to the pixels; light emission drivers to supply first and second light emission signals to the pixels; and a power supply to supply the power supply voltage and an initialization voltage to the pixels, wherein the initialization voltage is supplied to the anode during a first period, and the power supply voltage corresponding to a threshold voltage of the driving transistor is supplied to the gate during a first sub-period of the first period.

公开(公告)号：US11837143B2

公开(公告)日：2023-12-05

申请号：US18092510

申请日：2023-01-03

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Hyo Jin Lee ,  Jae Keun Lim ,  Hong Soo Kim ,  Jinyoung Roh ,  Sehyuk Park

IPC: G09G3/20

CPC classification number: G09G3/2074 ,  G09G2310/027 ,  G09G2320/0247 ,  G09G2330/028

Abstract: A display apparatus including: a display panel configured to display an image based on input image data; a data driver configured to output a data voltage to the display panel; and a driving controller configured to determine a driving frequency of the display panel based on flicker values for grayscale values of the input image data and output a driving frequency signal representing the driving frequency of the display panel to a host.

公开(公告)号：US11727867B2

公开(公告)日：2023-08-15

申请号：US17882919

申请日：2022-08-08

Applicant: Samsung Display Co., Ltd.

Inventor： Sehyuk Park ,  Jae Keun Lim ,  Hong Soo Kim ,  Jin Young Roh ,  Hyo Jin Lee

IPC: G09G3/3225 ,  G09G3/3233 ,  H10K59/12

CPC classification number: G09G3/3225 ,  G09G3/3233 ,  H10K59/12 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2300/0861 ,  G09G2310/08 ,  G09G2320/0214 ,  G09G2320/0233 ,  G09G2320/0247 ,  G09G2320/04 ,  G09G2320/045 ,  G09G2320/0626 ,  G09G2330/021

Abstract: A pixel of an organic light emitting diode display device includes a capacitor, a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor, an eighth transistor, a ninth transistor and an organic light emitting diode. The third transistor includes first and second sub-transistors which are coupled to each other in series between a drain of the first transistor and a gate node, and a fourth transistor includes third and fourth sub-transistors which are coupled to each other in series between a line of an initialization voltage and the gate node. The eighth transistor applies a reference voltage to a first node between the first and second sub-transistors in response to an emission signal, and a ninth transistor applies the reference voltage to a second node between the third and fourth sub-transistors in response to the emission signal.

公开(公告)号：US11705044B2

公开(公告)日：2023-07-18

申请号：US17320120

申请日：2021-05-13

Applicant: Samsung Display Co., Ltd.

Inventor： Jin Young Roh ,  Hyo Jin Lee ,  Jae Keun Lim ,  Hong Soo Kim ,  Se Hyuk Park

IPC: G09G3/20 ,  G09G3/3258

CPC classification number: G09G3/2003 ,  G09G3/3258 ,  G09G2310/027 ,  G09G2310/0289 ,  G09G2320/0233

Abstract: A display device includes: a pixel part to display an image and including pixels receiving a reference voltage; a controller to determine a value of the reference voltage based on a load of the entire pixel part, and to control a grayscale range of image data according to a location in the pixel part based on the reference voltage; a data driver to supply data voltages to the pixel part through data lines based on grayscale ranges adjusted for each location in the pixel part; and a scan driver to supply a scan signal to the pixels through scan lines.

公开(公告)号：US11521546B2

公开(公告)日：2022-12-06

申请号：US17517736

申请日：2021-11-03

Applicant: Samsung Display Co., Ltd.

Inventor： Se Hyuk Park ,  Hong Soo Kim ,  Jin Young Roh ,  Hyo Jin Lee ,  Jae Keun Lim

IPC: G09G3/3225

Abstract: A display device comprises pixels, an emission control driver, a scan driver, and a timing controller for selecting whether the display device is to operate in a first display mode in which the display device is driven at a first frequency or a second display mode in which the display device is driven at a second frequency lower than the first frequency based on input image data. The first display mode comprises first frame periods, and the second display mode comprises second frame periods having at least two sub-frames having a period equal to the first frame period. A total time required to supply the scan signals to the scan lines in one first frame period of the first frame periods and a total time required to supply the scan signals to the scan lines in one second frame period of the second frame periods are substantially same.