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：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：US11289018B2

公开(公告)日：2022-03-29

申请号：US17065418

申请日：2020-10-07

Applicant: Samsung Display Co., Ltd.

Inventor： Kyun Ho Kim ,  Yong-Jin Shin ,  Seong Jun Kim ,  Jung-Taek Kim ,  Joon Suk Baik ,  Se Keun Lee ,  Uk Jae Jang ,  Sang Su Han

IPC: G09G3/3233 ,  G09G3/3275

Abstract: A display device includes: a net power control circuit configured to analyze a screen load from an input image signal to generate a load signal including a load value corresponding to the screen load; and an overcurrent protection circuit configured to set a set current value at a predetermined ratio with respect to a global current value corresponding to the load value included in the load signal, and to determine whether or not the display device is powered off based on the set current value.

公开(公告)号：US10984718B2

公开(公告)日：2021-04-20

申请号：US16541822

申请日：2019-08-15

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Joon Suk Baik ,  Jae Woo Ryu ,  Myung Ho Lee ,  Sang Su Han

IPC: G09G3/3258 ,  G09G3/20

Abstract: A display device may include pixels coupled to scan lines and data lines, at least one scan driver for supplying a scan signal to the pixels through the scan lines, and a data driver for supplying a data signal and a bias signal to the pixels through the data lines. The pixels are supplied with the data signal when the scan signal is supplied during display periods, and are supplied with the bias signal when the scan signal is supplied during a bias period between the display periods. By the bias signal, a bias voltage is supplied to first group pixels that emit light with a preset grayscale during the display periods.

公开(公告)号：US10573258B2

公开(公告)日：2020-02-25

申请号：US15718806

申请日：2017-09-28

Applicant: Samsung Display Co., Ltd.

Inventor： Myeong Su Kim ,  Jae Ho Choi ,  Sil Yi Bang ,  Kuk-Hwan Ahn ,  Kwan-Young Oh ,  Sang Su Han

IPC: G09G3/36

Abstract: A display device includes a display panel including a plurality of pixels and divided into a plurality of regions, a data driver generating a plurality of reference gamma voltages based on a gamma control signal and including a data driving integrated circuit applying a data signal generated using the plurality of reference gamma voltages to a corresponding pixel among the plurality of pixels, a memory storing a plurality of gamma voltage data corresponding to a plurality of gamma curves of each of the plurality of regions, and a signal controller determining characteristics of a plurality of images divided and displayed in the plurality of regions using an input image signal, selecting the gamma curves corresponding to the plurality of regions according to the characteristics, and reading gamma voltage data corresponding to the selected gamma curve from the memory to generate the gamma control signal.

公开(公告)号：US11893927B2

公开(公告)日：2024-02-06

申请号：US18151142

申请日：2023-01-06

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Jung Taek Kim ,  Kyun Ho Kim ,  Jae Woo Ryu ,  Joon Suk Baik ,  Se Keun Lee ,  Sang Su Han

IPC: G09G3/32

CPC classification number: G09G3/32 ,  G09G2300/0842 ,  G09G2310/027 ,  G09G2310/061 ,  G09G2310/08 ,  G09G2320/0233 ,  G09G2320/0247

Abstract: A display device includes a processor which supplies grayscale data in active periods of frame periods and stops supply of the grayscale data in blank periods of the frame periods, a timing controller which generates a change signal when a difference between a first blank period of a first frame period and a second blank period of a second frame period is greater than a threshold value, a power supply which supplies a first power voltage having a voltage level changed based on the change signal to a first power line, and pixels commonly connected to the first power line.

公开(公告)号：US11756474B2

公开(公告)日：2023-09-12

申请号：US18148772

申请日：2022-12-30

Applicant: SAMSUNG DISPLAY CO., LTD.

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

IPC: G09G3/20

CPC classification number: G09G3/2092 ,  G09G2310/027 ,  G09G2310/0278

Abstract: A display device, includes: a scan driver configured to sequentially supply scan signals having a turn-on level to the first scan line and the second scan line during a first period and to concurrently supply scan signals having a turn-on level to the first scan line and the second scan line during a second period after the first period, wherein: a mask period corresponds to a difference between a start point of the second period and a start point of the first period in a next frame period, a first frame period and a second frame period have different mask periods, a third frame period between the first frame period and the second frame period has a same mask period as the first frame period, and a fourth frame period between the first frame period and the second frame period has a same mask period as the second frame period.

公开(公告)号：US11574574B2

公开(公告)日：2023-02-07

申请号：US17220087

申请日：2021-04-01

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Jung Taek Kim ,  Kyun Ho Kim ,  Jae Woo Ryu ,  Joon Suk Baik ,  Se Keun Lee ,  Sang Su Han

IPC: G09G3/20

Abstract: A display device includes a processor which supplies grayscale data in active periods of frame periods and stops supply of the grayscale data in blank periods of the frame periods, a timing controller which generates a change signal when a difference between a first blank period of a first frame period and a second blank period of a second frame period is greater than a threshold value, a power supply which supplies a first power voltage having a voltage level changed based on the change signal to a first power line, and pixels commonly connected to the first power line.

公开(公告)号：US11349392B2

公开(公告)日：2022-05-31

申请号：US16871157

申请日：2020-05-11

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：US09886916B2

公开(公告)日：2018-02-06

申请号：US14732900

申请日：2015-06-08

Applicant: Samsung Display Co., Ltd.

Inventor： Hyun-Seok Ko ,  Jin Kyu Park ,  Whee Won Lee ,  Sang Su Han

IPC: G09G3/36 ,  G09G3/20 ,  G09G5/00 ,  G09G5/36

CPC classification number: G09G3/36 ,  G09G3/2096 ,  G09G5/006 ,  G09G5/363 ,  G09G2310/0248 ,  G09G2320/0223 ,  G09G2320/0252 ,  G09G2320/0285 ,  G09G2370/047

Abstract: A display device includes an external image processing set and a display assembly configured to receive converted image data from the external image processing set and display an image corresponding to the converted image data. The display assembly includes a dynamic capacitance compensation lookup table storage unit which stores therein a dynamic capacitance compensation lookup table, and the external image processing set includes a memory which receives the dynamic capacitance compensation lookup table from the display assembly and stores therein the received dynamic capacitance compensation lookup table, and a graphic processing unit which outputs converted image data in which current frame data has undergone dynamic capacitance compensation based on the stored dynamic capacitance compensation lookup table, the current frame data and previous frame data.