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：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.

公开(公告)号：US20210125559A1

公开(公告)日：2021-04-29

申请号：US17014969

申请日：2020-09-08

Applicant: Samsung Display Co., Ltd.

Inventor： Se Hyuk PARK ,  Hong Soo KIM ,  Jin Young ROH ,  Hyo Jin LEE ,  Jae Keun LIM

IPC: G09G3/3258 ,  G09G3/3291 ,  H01L27/32

Abstract: A display apparatus includes a display panel, a first gate driver, a second gate driver, a third gate driver, and a data driver. The display apparatus is operable in a low frequency driving mode, and the low frequency driving mode includes a writing frame and a holding frame. At least one of gate power voltages used to generate a first gate signal, a second gate signal, and an emission signal has a first voltage level in the writing frame of the low frequency driving mode and a second voltage level in the holding frame of the low frequency driving mode. The data voltage is applied to the pixel in the writing frame of the low frequency driving mode. The data voltage applied to the pixel in the writing frame of the low frequency driving mode is maintained in the holding frame of the low frequency driving mode.

公开(公告)号：US20210005130A1

公开(公告)日：2021-01-07

申请号：US16828726

申请日：2020-03-24

Applicant: Samsung Display Co., Ltd.

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

IPC: G09G3/20 ,  G09G5/393

Abstract: A display driver includes a still image detector configured to receive a compressed image bitstream at an input frame frequency from a host processor, and to detect a still image by comparing the compressed image bitstream of a current frame and the compressed image bitstream of a previous frame, a driving frequency changer configured to output the compressed image bitstream at a first output frame frequency equal to the input frame frequency when the still image is not detected, and to output the compressed image bitstream at a second output frame frequency lower than the input frame frequency when the still image is detected, and a decoder configured to generate original image data at the first output frame frequency and the second output frame frequency.

公开(公告)号：US20230005409A1

公开(公告)日：2023-01-05

申请号：US17940414

申请日：2022-09-08

Applicant: Samsung Display Co., Ltd.

Inventor： Suk Hun LEE ,  Sangan KWON ,  Hong Soo KIM ,  Jin Young ROH ,  Sehyuk PARK ,  Hyo Jin LEE

IPC: G09G3/20

Abstract: A display apparatus includes a display panel displaying an image based on an input image data, a data driver outputting a data voltage to a data line, and a driving controller determining 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 grayscale values corresponding to the input image data, a voltage drop determiner configured to adjust a flicker value of the flicker values based on a voltage drop of the display panel, a still image determiner configured to determine whether the input image data is a still image or a video image, and a driving frequency determiner configured to determine the driving frequency of the display panel using the flicker value based on the input image data being the still image.

公开(公告)号：US20220328013A1

公开(公告)日：2022-10-13

申请号：US17583938

申请日：2022-01-25

Applicant: Samsung Display Co., Ltd.

Inventor： Jin Young ROH ,  Hong Soo KIM ,  Se Hyuk PARK ,  Hyo Jin LEE ,  Jae Keun LIM

IPC: G09G3/3291 ,  G09G3/3266

Abstract: Embodiments of the present disclosure relate to a display device and a driving method thereof, and the display device includes a demultiplexer connected to a first data line and transferring a data signal from the first data line to a plurality of second data lines during a data writing period of one frame, a compensator calculating an on-pixel ratio (OPR) using input data in the one frame and generating compensation data corresponding to a calculated OPR, and a data driver supplying the data signal to the first data line using the input data during the data writing period, and supplying a compensation data signal to the first data line using the compensation data in a blank period of the one frame, and the demultiplexer supplies the compensation data signal from the first data line to a second data line during the blank period.

公开(公告)号：US20220270552A1

公开(公告)日：2022-08-25

申请号：US17283430

申请日：2019-08-26

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Jin Young ROH ,  Hui NAM ,  Se Hyuk PARK ,  Hyo Jin LEE

IPC: G09G3/3266

Abstract: A display device includes a display panel including a plurality of pixels each coupled to a write scan line, a compensation scan line, an initialization scan line, a bypass scan line, and a data line; and a scan driver configured to supply i (where i is a natural number) write scan pulses, compensation scan pulses, initialization scan pulses, and bypass scan pulses to the write scan line, the compensation scan line, the initialization scan line, and the bypass scan line, respectively, during a first period corresponding to one frame period, and to supply j (where j is a natural number other than i) write scan pulses to the write scan line during each of frame periods of a second period including a plurality of consecutive frame periods.

公开(公告)号：US20210407436A1

公开(公告)日：2021-12-30

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

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：US20210375201A1

公开(公告)日：2021-12-02

申请号：US17204213

申请日：2021-03-17

Applicant: Samsung Display Co., Ltd.

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

IPC: G09G3/3225 ,  H01L27/32

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.