公开(公告)号：US20210049949A1

公开(公告)日：2021-02-18

申请号：US16943170

申请日：2020-07-30

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Hyo Jin LEE ,  Jae Keun LIM ,  Hong Soo KIM ,  Jinyoung ROH ,  Sehyuk PARK

IPC: G09G3/20

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：US20210035505A1

公开(公告)日：2021-02-04

申请号：US16923008

申请日：2020-07-07

Applicant: Samsung Display Co., Ltd.

Inventor： Sangan KWON ,  Hyojin LEE ,  Jinyoung ROH ,  Sehyuk PARK

IPC: G09G3/3275 ,  G09G3/3258 ,  G09G3/3233 ,  G09G3/20

Abstract: An OLED display device includes display panel and a panel driver. The panel driver receives input image data at an input frame frequency and determines whether the input image data represent a still image. When the input image data do not represent the still image, the panel driver drives the display panel at a first output frame frequency substantially equal to the input frame frequency. When the input image data represent the still image, the panel driver drives the display panel at a second output frame frequency lower than the input frame frequency for a low frequency driving time and drives the display panel at a third output frame frequency higher than the second output frame frequency for a high frequency insertion time determined by one of a panel characteristic of the display panel and a representative gray level of the input image data, after the low frequency driving time.

公开(公告)号：US20200350389A1

公开(公告)日：2020-11-05

申请号：US16843637

申请日：2020-04-08

Applicant: Samsung Display Co., Ltd.

Inventor： Hyo Jin LEE ,  Jinyoung ROH ,  Sehyuk PARK ,  Sangan KWON ,  Hui NAM

IPC: H01L27/32 ,  G09G3/3291

Abstract: A display apparatus includes: a display panel configured to display an image based on input image data; a gate driver configured to output a gate signal to the display panel; a data driver configured to output a data voltage to the display panel; a driving controller configured to control an operation of the gate driver and an operation of the data driver, to determine a normal driving mode and a low frequency driving mode based on the input image data, and to determine a driving frequency of the display panel based on the input image data; and a touch driver configured to detect a touch event occurring on the display panel, and to output a touch interrupt signal representing the touch event to the driving controller.

公开(公告)号：US20230013182A1

公开(公告)日：2023-01-19

申请号：US17935562

申请日：2022-09-26

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：US20220148524A1

公开(公告)日：2022-05-12

申请号：US17586470

申请日：2022-01-27

Applicant: Samsung Display Co., Ltd.

Inventor： Sehyuk PARK ,  Sangan KWON ,  HongSoo KIM ,  Jinyoung ROH ,  Hyo Jin LEE

IPC: G09G3/3291

Abstract: A method of driving a display panel includes dividing an input image into a plurality of segments, generating a flicker value of a segment of the plurality of segments, determining whether to compensate the flicker value of the segment or not according to a segment size, compensating the flicker value of the segment based on the segment size, determining a frame rate of the display panel based on the flicker value of the segment and outputting a data voltage to the display panel in the frame rate. The flicker value of the segment is compensated based on the flicker value of the segment and flicker values of segments that are adjacent to the segment.

公开(公告)号：US20210295769A1

公开(公告)日：2021-09-23

申请号：US17341323

申请日：2021-06-07

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Sehyuk PARK ,  Hyojin LEE ,  Hui NAM

IPC: G09G3/32

Abstract: A display device is capable of improving the image quality, the display device including: a display panel; a pixel on the display panel and including at least one light emitting element; a timing controller configured to receive an image data signal of the pixel and to compensate for a gray value of the image data signal based on the number of light emitting elements of the pixel to generate a compensated image data signal; and a data driver configured to select a compensation data signal corresponding to the compensated image data signal from the timing controller and to apply the compensation data signal to the pixel.

公开(公告)号：US20210272495A1

公开(公告)日：2021-09-02

申请号：US17251198

申请日：2019-05-30

Applicant: Samsung Display Co., LTD.

Inventor： Sehyuk PARK ,  Hyo Jin LEE

IPC: G09G3/20

Abstract: A method of driving a display panel includes determining whether an input data signal represents a moving image or a static image, determining an image transition from a first static image to a second static image when the input data signal represents the static image, determining a number of afterimage compensation frames using data of the first static image and data of the second static image when the image transition occurs and inserting the afterimage compensation frames corresponding to a determined number of the afterimage compensation frames in a single low frequency driving cycle between a first normal frame corresponding to the first static image and a second normal frame corresponding to the second static image.

公开(公告)号：US20210256911A1

公开(公告)日：2021-08-19

申请号：US17307969

申请日：2021-05-04

Applicant: Samsung Display Co., Ltd.

Inventor： Hyo Jin LEE ,  Sangan KWON ,  Jin Young ROH ,  Sehyuk PARK

IPC: G09G3/3258

Abstract: A pixel of a display device includes a capacitor; a light emitting diode; and first, second, third, and fourth transistors. The display device has a normal frequency mode and a low frequency mode. Two electrodes of the capacitor are respectively connected to a first voltage source and a gate node. A gate electrode of the first transistor is connected to the gate node. In a hold period in the low frequency mode, both the second and third transistors receive a scan signal, the third transistor diode-connects the first transistor, the fourth transistor receives an initialization signal and transfers an initialization voltage to the gate node, the scan signal is at a first off voltage level, and the initialization signal is at a second off voltage level unequal to the first off voltage level. The cathode of the light emitting diode is connected to a second voltage source.

公开(公告)号：US20210241699A1

公开(公告)日：2021-08-05

申请号：US17257265

申请日：2019-06-21

Applicant: Samsung Display Co., LTD.

Inventor： Hyo-Jin LEE ,  Sehyuk PARK

IPC: G09G3/3258 ,  G09G3/3291

Abstract: A display device includes a display panel and a display panel driver. The display panel includes a pixel having a switching element of a first type and a switching element of a second type different from the first type. The display panel driver drives the display panel. In a first mode, the display panel driver drives the switching element of the first type and the switching element of the second type with a high driving frequency. In a second mode, the display panel driver drives the switching element of the first type with the high driving frequency and the switching element of the second type with low driving frequency which is lower than the high driving frequency. In a third mode, the display panel driver drives the switching element of the first type and the switching element of the second type with the low driving frequency.

公开(公告)号：US20210193048A1

公开(公告)日：2021-06-24

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 ,  G09G3/3258 ,  G09G3/3275

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.