公开(公告)号：US11348508B2

公开(公告)日：2022-05-31

申请号：US16989073

申请日：2020-08-10

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Sehyuk Park ,  Hong Soo Kim ,  Sangan Kwon ,  Jinyoung Roh ,  Hyo Jin Lee

IPC: G09G3/20 ,  G09G3/3291

Abstract: A display apparatus includes a display panel, a data driver and a driving controller. The display panel is configured to display an image based on input image data. The data driver is configured to output a data voltage to the display panel. The driving controller includes a frequency adjuster circuit configured to determine a driving frequency of the display panel, and a dithering circuit configured to change a grayscale value of the input image data according to frames. The frequency adjuster circuit is configured to determine the driving frequency of the display panel based on the input image data and based on whether the dithering part is activated.

公开(公告)号：US11341913B2

公开(公告)日：2022-05-24

申请号：US17227579

申请日：2021-04-12

Applicant: Samsung Display Co., Ltd.

Inventor： Hyo Jin Lee ,  Joon-Chul Goh ,  Sangan Kwon ,  Hui Nam ,  Jin Young Roh ,  Sehyuk Park

IPC: G09G3/3233 ,  G09G3/325 ,  G09G3/3275

Abstract: A pixel circuit includes a main-circuit that controls an organic light-emitting element by controlling a driving current to flow into the organic light-emitting element and a sub-circuit including a first compensation transistor including a gate terminal which receives a first gate signal, a second compensation transistor including a gate terminal which receives a second gate signal, and an initialization transistor including a gate terminal which receives an initialization signal. Here, in a low-frequency driving mode, a driving frequency of the first gate signal is N hertz (Hz), a driving frequency of the initialization signal is N Hz, a driving frequency of the second gate signal is M Hz, the first compensation transistor and the initialization transistor are turned on during a first time duration in N non-light-emitting periods per second, and the second compensation transistor is turned on during a second time duration in M non-light-emitting periods per second.

公开(公告)号：US11151924B2

公开(公告)日：2021-10-19

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: G09G5/393 ,  G09G3/20

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：US11049451B2

公开(公告)日：2021-06-29

申请号：US16888284

申请日：2020-05-29

Applicant: Samsung Display Co., Ltd.

Inventor： Sehyuk Park ,  Sangan Kwon ,  HongSoo Kim ,  Jinyoung Roh ,  Hyojin Lee

IPC: G09G3/32 ,  G09G3/3233 ,  G09G3/3266

Abstract: A display device including: a controller including: a zone splitting block configured to divide input image data into a plurality of partial image data respectively corresponding to a plurality of partial panel zones of the display panel; a plurality of panel zone frequency deciding blocks configured to determine a plurality of driving frequencies for the plurality of partial panel zones by analyzing the plurality of partial image data, respectively; a non-driving period setting block configured to classify a plurality of frame periods into a driving frame period and a non-driving frame period based on a maximum driving frequency of the plurality of driving frequencies; and a scan driver control block configured to provide the scan driver input signal to the scan driver in the driving frame period, and to not provide the scan driver input signal to the scan driver in the non-driving frame period.

公开(公告)号：US20200349893A1

公开(公告)日：2020-11-05

申请号：US16800122

申请日：2020-02-25

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： HYO JIN LEE ,  Sangan Kwon ,  Hui Nam ,  Jinyoung Roh ,  Sehyuk Park

IPC: G09G3/3291

Abstract: A display device includes a display panel including a plurality of pixels and a display panel driver configured to drive the display panel. Here, the display panel driver is configured to receive input image data, to drive the display panel at a first driving frequency when the input image data corresponds to a moving image, and to select one of a plurality of flicker lookup tables based on the first driving frequency and drive the display panel at a second driving frequency based on the flicker lookup table when the input image data corresponds to a still image.

公开(公告)号：US12249275B2

公开(公告)日：2025-03-11

申请号：US18613133

申请日：2024-03-22

Applicant: Samsung Display Co., Ltd.

Inventor： Jihye Kim ,  Sangan Kwon ,  Soon-Dong Kim ,  Taehoon Kim ,  Seok Hwan Roh ,  Changnoh Yoon

IPC: G09G3/00 ,  G09G3/32

Abstract: A display device which includes a display panel that includes a first display area and a second display area, and a driving controller. During a multi-frequency mode, the driving controller drives the first display area by using a first driving frequency and drives the second display area by using a second driving frequency. During the multi-frequency mode, when the second driving frequency changes from a first frequency to a second frequency, the driving controller drives the first display area and the second display area during at least one frame by using a base frequency, drives the first display area and the second display area during at least one second frame by using an intermediate frequency between the base frequency and the second frequency, and then drives the first display area by using the first driving frequency and drives the second display area by using the second frequency.

公开(公告)号：US12046198B2

公开(公告)日：2024-07-23

申请号：US17981599

申请日：2022-11-07

Applicant: Samsung Display Co., Ltd.

Inventor： Sangan Kwon ,  Hui Nam ,  Soon-Dong Kim ,  Changnoh Yoon ,  Seungjae Lee

IPC: G09G3/3233 ,  G09G3/00 ,  G09G5/14

CPC classification number: G09G3/3233 ,  G09G5/14 ,  G09G3/035 ,  G09G2300/0426 ,  G09G2300/0819 ,  G09G2310/0213 ,  G09G2320/10

Abstract: A display device includes a plurality of pixels arranged in m rows and n columns, where the pixels receive write scan signals, data voltages and compensation scan signals, a plurality of write scan lines which provides the write scan signals to the pixels, a plurality of data lines which provides the data voltages to the pixels, and a plurality of compensation scan lines which provides the compensation scan signals to the pixels, wherein in h-th to p-th frames, the data voltages are applied to pixels arranged in first to i-th rows, and in h-th to (h+k)-th frames, the data voltages are applied to pixels of a row unit by increasing sequentially the number of the row unit to which the data voltages are applied in at least one row unit from an i-th row to an (i+1)-th row.

公开(公告)号：US11924969B2

公开(公告)日：2024-03-05

申请号：US18082038

申请日：2022-12-15

Applicant: Samsung Display Co., Ltd.

Inventor： Kyung-Hwa Lim ,  Sangan Kwon ,  Kyunho Kim ,  Yong-Jin Shin ,  Shimho Yi ,  Heebum Park

IPC: H05K1/14 ,  G09G3/20 ,  H05K1/02 ,  H05K1/11 ,  H05K1/18 ,  G09G3/3225 ,  G09G3/36 ,  H05K3/36

CPC classification number: H05K1/142 ,  G09G3/2092 ,  H05K1/028 ,  H05K1/111 ,  H05K1/147 ,  H05K1/18 ,  G09G3/3225 ,  G09G3/3648 ,  G09G2310/08 ,  G09G2380/02 ,  H05K3/363 ,  H05K2201/055 ,  H05K2201/058 ,  H05K2201/09027 ,  H05K2201/09036 ,  H05K2201/10128

Abstract: A display device includes a display panel, a first circuit board, a control unit disposed on the first circuit board, a second circuit board, and a coupling film which electrically couples the control unit and the second circuit board to each other. The coupling film includes a first coupling part including a first region attached to the first circuit board, and a second region overlapping the display panel when viewed in a thickness direction of the display panel, a second coupling part including a third region attached to the second circuit board, and a fourth region overlapping the display panel when viewed in the thickness direction of the display panel, and a third coupling part coupled to each of the second region and the fourth region to electrically couple the first coupling part and the second coupling part to each other.

公开(公告)号：US11854496B2

公开(公告)日：2023-12-26

申请号：US17981762

申请日：2022-11-07

Applicant: Samsung Display Co., Ltd.

Inventor： Soon-Dong Kim ,  Sangan Kwon ,  Changnoh Yoon ,  Seungjae Lee

IPC: G09G3/3291 ,  G09G3/3266

CPC classification number: G09G3/3291 ,  G09G3/3266 ,  G09G2310/027 ,  G09G2320/0285

Abstract: The display device includes a display panel in which a first display area and a second display area adjacent to the first display area are defined, a data driving circuit which drives the plurality of data lines, a scan driving circuit which drives the plurality of scan lines, and a driving controller which receives an image signal and a control signal, and controls the data driving circuit and the scan driving circuit based on an operation mode, where the driving controller includes a luminance deviation compensation unit which compensates for luminance deviation of the first display area and the second display area when the operation mode is a multi-frequency mode in which the first display area is driven at a first frequency and the second display area is driven at a second frequency different from the first frequency.

公开(公告)号：US11741893B2

公开(公告)日：2023-08-29

申请号：US17864798

申请日：2022-07-14

Applicant: Samsung Display Co., Ltd.

Inventor： Changnoh Yoon ,  Sangan Kwon ,  Soon-Dong Kim ,  Taehoon Kim

IPC: G09G5/00 ,  G09G3/3225

CPC classification number: G09G3/3225 ,  G09G2300/0842 ,  G09G2320/0271 ,  G09G2320/0626

Abstract: A display device includes a display panel, a power supply unit, and a low frequency offset compensator. The display panel includes a plurality of pixels. The power supply unit generates a first initialization voltage and a second initialization voltage and provides the first initialization voltage and the second initialization voltage to the pixels. The low frequency offset compensator selectively applies an offset to the second initialization voltage when the display panel is driven at a low frequency.