公开(公告)号：US11749208B2

公开(公告)日：2023-09-05

申请号：US17933551

申请日：2022-09-20

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Kyun Ho Kim ,  Jung Taek Kim ,  Hong Kyu Kim ,  Hyung Keun Park ,  Joon Suk Baik ,  Young Soo Sohn ,  Yong Jin Shin ,  Se Keun Lee

IPC: G09G3/3266 ,  G09G3/3275 ,  H10K59/131

CPC classification number: G09G3/3266 ,  G09G3/3275 ,  H10K59/131 ,  G09G2310/0278 ,  G09G2310/062

Abstract: A display device includes: a pixel connected to each of a first scan line, a second scan line, and a data line; a scan driver supplying a first scan signal to the first scan line and a second scan signal to the second scan line; a controller dividing one frame period into an active period and a blank period and generating a count signal in which a time duration of the blank period is counted and a power control signal; a data driver supplying a data signal to the data line; and a power supply controlling a source driving voltage supplied to the data driver according to a duration of the blank period based on the power control signal. When the count signal reaches a reference value, the controller supplies a start signal for output of the first scan signal to the scan driver.

公开(公告)号：US11690168B2

公开(公告)日：2023-06-27

申请号：US16951060

申请日：2020-11-18

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Yong Jin Shin ,  Kyun Ho Kim ,  Uk Jae Jang ,  Bong Im Park

IPC: H05K1/02 ,  H05K1/18 ,  H01L23/498 ,  H05K1/14 ,  G09G3/00

CPC classification number: H05K1/0268 ,  G09G3/006 ,  H01L23/49838 ,  H05K1/14 ,  H05K1/18 ,  G09G2330/12 ,  H01L23/4985 ,  H05K2201/049 ,  H05K2201/10128

Abstract: A display device including: a display panel; a first substrate attached to a side of the display panel; and a second substrate attached to a side of the first substrate, wherein the display panel includes a first panel test pad and a second panel test pad, the first substrate includes a 1-1 circuit test lead overlapping and connected to the first panel test pad, a 1-2 circuit test lead overlapping and connected to the second panel test pad, a 2-1 circuit test lead overlapping and connected to the second substrate, a 1-1 test lead line connected to the 1-1 circuit test lead, a 1-2 test lead line connected to the 1-2 circuit test lead, and a first test lead line connected to the 2-1 circuit test lead, and the 1-1 test lead line and the 1-2 test lead line are connected to the first test lead line.

公开(公告)号：US11657767B2

公开(公告)日：2023-05-23

申请号：US17536181

申请日：2021-11-29

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Ki Hyun Pyun ,  Sung In Kang ,  Kyun Ho Kim

IPC: G09G3/3275

CPC classification number: G09G3/3275 ,  G09G2310/027 ,  G09G2320/0233

Abstract: Provided are a display device and a driving method thereof. The display device includes: a display panel for displaying an image, based on data signals supplied from data lines; a load controller for determining a scale factor for controlling a target luminance of the image displayed in the display panel, based on a load of first image data input from the outside; and a data driver for outputting data signals to the data lines, corresponding to the first image data corrected using the scale factor. The data driver includes a plurality of data driver chips coupled to at least one data line among the data lines. The load controller determines the scale factor, based on at least one of a total load of the first image data and local loads with respect to the respective data driver chips.

公开(公告)号：US11632046B2

公开(公告)日：2023-04-18

申请号：US17827862

申请日：2022-05-30

Applicant: Samsung Display Co., Ltd.

Inventor： Kyun Ho Kim ,  Jung-taek Kim ,  Joon Suk Baik ,  Sang Su Han ,  Jae Woo Ryu ,  Myung Ho Lee

IPC: H02M3/156 ,  H03F3/14

Abstract: A power voltage generator includes a booster, a voltage sensor, a constant voltage controller and a constant current controller. The booster is configured to boost an input voltage to an output voltage based on an on-off operation of a switch. The voltage sensor is configured to generate a sensing voltage by sensing the output voltage. The constant voltage controller is configured to generate a first switching signal to control the switch by comparing the sensing voltage with a reference voltage. The constant current controller is configured to generate a gain based on a ratio of an electrode signal of the switch and a target signal by comparing the electrode signal of the switch with the target signal.

公开(公告)号：US11138936B2

公开(公告)日：2021-10-05

申请号：US16793816

申请日：2020-02-18

Applicant: Samsung Display Co., Ltd.

Inventor： Kyun Ho Kim

IPC: G06F3/038 ,  G09G5/00 ,  G09G3/3258

Abstract: A display device includes a display panel including a plurality of pixels, a controller for dividing the display panel into a plurality of regions, compensating for image data provided from the outside based on a data compensation value set with respect to each of the plurality of regions, and providing the compensated image data to the display panel, and an initialization power supply for supplying an initialization power supply voltage to the display panel, wherein the data compensation value is set with respect to each of the plurality of regions of the display panel based on a difference between a target initialization power supply voltage and the initialization power supply voltage, wherein the target initialization power supply voltage is a voltage that is configured to allow any region to emit light at a target luminance with respect to image data for sensing.

公开(公告)号：US10319328B2

公开(公告)日：2019-06-11

申请号：US15800773

申请日：2017-11-01

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Kyun Ho Kim ,  Bong Gyun Kang ,  Sang An Kwon ,  Seung Hwan Moon ,  Yong Jin Shin ,  Neung Beom Lee ,  Jun Pyo Lee ,  Kyung Hwa Lim

IPC: G09G3/20 ,  G09G3/36

Abstract: A display device and method is provided that permits selection of a first lookup table or a second lookup table to operate the data driver at respectively different temperatures to prevent heat from damaging the display device. The display device includes a detector which detects the number of toggles in which the amount of change in gray values of successive pixels driven by the same data line in one frame is equal to or greater than a reference gray change amount. A comparator compares the number of toggles detected by the detector with a reference number of toggles, and a lookup table selector which selects any one of a first lookup table and a second lookup table based on the comparison result of the comparator and provides the selected first lookup table or second lookup table to a data driver.

公开(公告)号：US09923462B2

公开(公告)日：2018-03-20

申请号：US15157266

申请日：2016-05-17

Applicant: Samsung Display Co., Ltd.

Inventor： Kyun Ho Kim ,  Min Ho Park ,  Yoon Sik Park

IPC: H02M3/158 ,  H02M1/32 ,  H02M3/157

CPC classification number: H02M3/158 ,  H02M1/32 ,  H02M3/157 ,  H02M3/1588 ,  Y02B70/1466

Abstract: A DC-DC converter includes: a switching circuit to change a voltage value of an input voltage, and to generate an output voltage; a feedback circuit connected between an output terminal to which the output voltage is supplied and a source of a first power, and to generate a feedback voltage corresponding to the output voltage; a gate pulse generator to generate a gate pulse to be supplied to the switching circuit by utilizing the feedback voltage; a current protector to control the switching circuit by utilizing the feedback voltage and the gate pulse; and a voltage protector to control the switching circuit by utilizing the feedback voltage.

公开(公告)号：US11670225B2

公开(公告)日：2023-06-06

申请号：US17700016

申请日：2022-03-21

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Jung Taek Kim ,  Sang Su Han ,  Kyun Ho Kim ,  Hyung Keun Park ,  Joon Suk Baik ,  Se Keun Lee

IPC: G09G3/32 ,  G09G3/20 ,  G09G3/3233 ,  G09G3/36

CPC classification number: G09G3/32 ,  G09G3/2092 ,  G09G3/3233 ,  G09G3/36 ,  G09G3/3648 ,  G09G2310/0205 ,  G09G2310/027 ,  G09G2310/0278 ,  G09G2310/061 ,  G09G2310/062 ,  G09G2320/0252 ,  G09G2320/0257 ,  G09G2320/0261 ,  G09G2320/0295 ,  G09G2320/043 ,  G09G2320/0673 ,  G09G2330/021

Abstract: A display device includes: a plurality of pixel blocks each including a plurality of pixels; a scan driver supplying a scan signal to the scan lines and to supply a control signal to the control lines; a data driver supplying an image data voltage or a low grayscale data voltage to the data lines; and a power supply supplying a reference voltage to the pixels, wherein the pixels are configured to receive the image data voltage during a first scan period of a frame, and to receive the low grayscale data voltage during a second scan period of the frame, and the reference voltage supplied to a first pixel row of at least one of the pixel blocks in the first scan period is different from the reference voltage supplied to a last pixel row of at least one of the pixel blocks in the first scan period.

公开(公告)号：US11527202B2

公开(公告)日：2022-12-13

申请号：US16542165

申请日：2019-08-15

Applicant: Samsung Display Co., Ltd.

Inventor： Kyun Ho Kim ,  Jong-Keun Kim ,  Min Young Park ,  Jong Min Shim

IPC: G09G3/32 ,  G09G3/3258

Abstract: A display device according to an exemplary embodiment includes: a display panel including a plurality of pixels; a plurality of source boards connected to the display panel; a power control board connected to the source board and configured to supply a power voltage to the plurality of pixels; and a control board configured to control an output of voltages supplied to the source board according to a control signal transmitted by the power control board.

公开(公告)号：US11475845B2

公开(公告)日：2022-10-18

申请号：US17323251

申请日：2021-05-18

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Kyun Ho Kim ,  Jung Taek Kim ,  Hong Kyu Kim ,  Hyung Keun Park ,  Joon Suk Baik ,  Young Soo Sohn ,  Yong Jin Shin ,  Se Keun Lee

IPC: G09G3/3266 ,  H01L27/32 ,  G09G3/3275

Abstract: A display device includes: a pixel connected to each of a first scan line, a second scan line, and a data line; a scan driver supplying a first scan signal to the first scan line and a second scan signal to the second scan line; a controller dividing one frame period into an active period and a blank period and generating a count signal in which a time duration of the blank period is counted and a power control signal; a data driver supplying a data signal to the data line; and a power supply controlling a source driving voltage supplied to the data driver according to a duration of the blank period based on the power control signal. When the count signal reaches a reference value, the controller supplies a start signal for output of the first scan signal to the scan driver.