公开(公告)号：US11527204B2

公开(公告)日：2022-12-13

申请号：US17524649

申请日：2021-11-11

Applicant: Samsung Display Co., Ltd.

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

IPC: G09G3/36 ,  G09G3/3258 ,  G09G3/3291 ,  H01L27/32 ,  H01L29/786 ,  H01L27/12

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：US11462172B2

公开(公告)日：2022-10-04

申请号：US17122505

申请日：2020-12-15

Applicant: Samsung Display Co., Ltd.

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

IPC: G09G3/32 ,  G09G3/3266

Abstract: A display device includes: a pixel part including a plurality of pixels; a first scan driver to provide a first scan signal to each of the pixels; and an initialization controller to control the first scan driver. Each of the pixels includes a pixel circuit including a plurality of transistors, and a light emitting element connected to the pixel circuit, an anode of the light emitting element is to be initialized to a first initialization voltage in response to the first scan signal having a gate-on level, and the initialization controller is to determine whether to provide the first scan signal having the gate-on level to each of the pixels for each frame.

公开(公告)号：US11462145B2

公开(公告)日：2022-10-04

申请号：US16992011

申请日：2020-08-12

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：US11410599B2

公开(公告)日：2022-08-09

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 ,  G09G3/3233 ,  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.

公开(公告)号：US11380269B2

公开(公告)日：2022-07-05

申请号：US17460553

申请日：2021-08-30

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Hyo Jin Lee ,  Sangan Kwon ,  Hui Nam ,  Jinyoung Roh ,  Sehyuk Park

IPC: G09G3/30 ,  G09G3/36 ,  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：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：US20220059012A1

公开(公告)日：2022-02-24

申请号：US17520907

申请日：2021-11-08

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：US11232735B2

公开(公告)日：2022-01-25

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：US11183106B2

公开(公告)日：2021-11-23

申请号：US16793880

申请日：2020-02-18

Applicant: Samsung Display Co., Ltd.

Inventor： Se Hyuk Park ,  Hyo Jin Lee ,  Sang An Kwon ,  Jin Young Roh

IPC: G09G3/30 ,  G06F3/038 ,  G09G5/00 ,  G09G3/32

Abstract: A display device includes a display unit. The display unit includes a first display area and a second display area. A first scan line, a first power line, and first pixels connected to the first scan line and the first power line are in the first display area. A second scan line, a second power line, and second pixels connected to the second scan line and the second power line are in the second display area. A scan driver is configured to sequentially provide a scan signal to the first scan line and the second scan line. A power supply is configured to provide a power source voltage that is varied independently to the first power line and the second power line.