公开(公告)号：US11227555B2

公开(公告)日：2022-01-18

申请号：US17171428

申请日：2021-02-09

Applicant: Samsung Display Co., Ltd.

Inventor： Se Hyuk Park ,  Hong Soo Kim ,  Jin Young Roh ,  Hyo Jin Lee ,  Jae Keun Lim

IPC: G09G3/3275

Abstract: A display device includes a display panel including a plurality of pixels, a data driver which provides data signals to the plurality of pixels, and a controller which controls the data driver. The controller writes frame data to a frame memory, reads the frame data in each of a plurality of frame periods, performs in a first frame period of the plurality of frame periods a still image detection operation that determines whether the frame data represent a still image, and does not performs the still image detection operation in a second frame period of the plurality of frame periods subsequent to the first frame period.

公开(公告)号：US11017723B2

公开(公告)日：2021-05-25

申请号：US16868463

申请日：2020-05-06

Applicant: Samsung Display Co., Ltd.

Inventor： Hyo Jin Lee ,  Sangan Kwon ,  Jin Young Roh ,  Sehyuk Park

IPC: G09G3/3258 ,  G09G3/3233

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：US20200294451A1

公开(公告)日：2020-09-17

申请号：US16817527

申请日：2020-03-12

Applicant: Samsung Display Co., Ltd.

Inventor： Ji Woong Kim ,  Oh Jo Kwon ,  Hyo Jin Lee ,  Se Hyuk Park

IPC: G09G3/3266 ,  G09G3/3291

Abstract: A method of driving a pixel including: during a first period of a first frame, applying a first scan signal having a turn-on level to the first scan line, applying a data voltage to a data line, and applying a second scan signal having the turn-on level to the second scan line; and during a second period of a second frame, applying the first scan signal having the turn-on level to the first scan line, applying a bias voltage to the data line, and applying the second scan signal having a turn-off level to the second scan line, the second frame is a frame subsequent to the first frame, the second period is longer than the first period, and a light-emitting diode emits light at luminance based on the data voltage during at least a portion of the first frame and at least a portion of the second frame.

公开(公告)号：US11837143B2

公开(公告)日：2023-12-05

申请号：US18092510

申请日：2023-01-03

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Hyo Jin Lee ,  Jae Keun Lim ,  Hong Soo Kim ,  Jinyoung Roh ,  Sehyuk Park

IPC: G09G3/20

CPC classification number: G09G3/2074 ,  G09G2310/027 ,  G09G2320/0247 ,  G09G2330/028

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：US11727867B2

公开(公告)日：2023-08-15

申请号：US17882919

申请日：2022-08-08

Applicant: Samsung Display Co., Ltd.

Inventor： Sehyuk Park ,  Jae Keun Lim ,  Hong Soo Kim ,  Jin Young Roh ,  Hyo Jin Lee

IPC: G09G3/3225 ,  G09G3/3233 ,  H10K59/12

CPC classification number: G09G3/3225 ,  G09G3/3233 ,  H10K59/12 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2300/0861 ,  G09G2310/08 ,  G09G2320/0214 ,  G09G2320/0233 ,  G09G2320/0247 ,  G09G2320/04 ,  G09G2320/045 ,  G09G2320/0626 ,  G09G2330/021

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.

公开(公告)号：US11705044B2

公开(公告)日：2023-07-18

申请号：US17320120

申请日：2021-05-13

Applicant: Samsung Display Co., Ltd.

Inventor： Jin Young Roh ,  Hyo Jin Lee ,  Jae Keun Lim ,  Hong Soo Kim ,  Se Hyuk Park

IPC: G09G3/20 ,  G09G3/3258

CPC classification number: G09G3/2003 ,  G09G3/3258 ,  G09G2310/027 ,  G09G2310/0289 ,  G09G2320/0233

Abstract: A display device includes: a pixel part to display an image and including pixels receiving a reference voltage; a controller to determine a value of the reference voltage based on a load of the entire pixel part, and to control a grayscale range of image data according to a location in the pixel part based on the reference voltage; a data driver to supply data voltages to the pixel part through data lines based on grayscale ranges adjusted for each location in the pixel part; and a scan driver to supply a scan signal to the pixels through scan lines.

公开(公告)号：US11538421B2

公开(公告)日：2022-12-27

申请号：US16824377

申请日：2020-03-19

Applicant: Samsung Display Co., Ltd.

Inventor： Hongsoo Kim ,  Sehyuk Park ,  Hyo Jin Lee ,  Sangan Kwon ,  Jinyoung Roh ,  Sukhun Lee ,  Jun Heyung Jung

IPC: G09G3/3291

Abstract: A display device includes display device includes: a display panel including a plurality of pixels; a data driver configured to generate data voltages based on output image data, and to provide the data voltages to the plurality of pixels; and a controller configured to receive input image data and input frequency information from a host processor, and to provide the output image data to the data driver, wherein the controller includes an adaptive refresh block configured to: determine a target frequency by analyzing the input image data; determine a masking ratio based on an input frequency represented by the input frequency information and the target frequency; and selectively output the input image data as the output image data by performing a masking operation on the input image data with the masking ratio.

公开(公告)号：US11521546B2

公开(公告)日：2022-12-06

申请号：US17517736

申请日：2021-11-03

Applicant: Samsung Display Co., Ltd.

Inventor： Se Hyuk Park ,  Hong Soo Kim ,  Jin Young Roh ,  Hyo Jin Lee ,  Jae Keun Lim

IPC: G09G3/3225

Abstract: A display device comprises pixels, an emission control driver, a scan driver, and a timing controller for selecting whether the display device is to operate in a first display mode in which the display device is driven at a first frequency or a second display mode in which the display device is driven at a second frequency lower than the first frequency based on input image data. The first display mode comprises first frame periods, and the second display mode comprises second frame periods having at least two sub-frames having a period equal to the first frame period. A total time required to supply the scan signals to the scan lines in one first frame period of the first frame periods and a total time required to supply the scan signals to the scan lines in one second frame period of the second frame periods are substantially same.

公开(公告)号：US11521531B2

公开(公告)日：2022-12-06

申请号：US16950004

申请日：2020-11-17

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Hong Soo Kim ,  Jin Young Roh ,  Se Hyuk Park ,  Hyo Jin Lee ,  Jae Keun Lim ,  Jun Heyung Jung

IPC: G09G3/20

Abstract: A display device includes a display panel including a plurality of pixels, and a panel driver including N registers, where N is an integer greater than 1. The panel driver is configured to divide the display panel into N first detection regions, to perform a first still image detection operation on each of the N first detection regions by using the N registers, to divide the display panel into N second detection regions different from the N first detection regions by using a result of the first still image detection operation, and to perform a second still image detection operation on each of the N second detection regions by using the N registers.

公开(公告)号：US11488537B2

公开(公告)日：2022-11-01

申请号：US17182825

申请日：2021-02-23

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Se Hyuk Park ,  Hong Soo Kim ,  Jin Young Roh ,  Bong Hyun You ,  Hyo Jin Lee ,  Jae Keun Lim

IPC: G09G3/3266

Abstract: A display device includes first dots connected to first scan lines, second dots connected to second scan lines and alternately disposed with the first dots in a first direction and a second direction different from the first direction, a scan driver including first stages respectively connected to the first scan lines and second stages respectively connected to the second scan lines, and a data driver connected to the first dots and the second dots through data lines. The first stages are connected to first clock lines, the second stages are connected to second clock lines, first stages except a first start stage are respectively connected to corresponding first scan lines of corresponding previous first stages, and second stages except a second start stage are respectively connected to corresponding second scan lines of corresponding previous second stages.