公开(公告)号：US12057048B2

公开(公告)日：2024-08-06

申请号：US18307536

申请日：2023-04-26

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Ki Hyun Pyun ,  Hee Sook Park

IPC: G09G3/20 ,  G09G3/3233

CPC classification number: G09G3/2007 ,  G09G3/2096 ,  G09G3/3233 ,  G09G2300/0842 ,  G09G2320/0233 ,  G09G2320/0247 ,  G09G2320/041 ,  G09G2330/028

Abstract: A display device includes a display panel including a plurality of pixels, a timing controller, a data driver and a scale factor. The timing controller calculates a frame load value corresponding to an image frame of input image data and generates image data by scaling grayscale values of the input image data using a scale factor. The data driver generates a data signal corresponding to the image data and supplies the data signal to the pixels. The scale factor generating circuit sets a reference range based on a temperature of the display panel and a global current value that flows through the pixels, and generates the scale factor included within the reference range based on the frame load value and the global current value.

公开(公告)号：US11790849B2

公开(公告)日：2023-10-17

申请号：US17646547

申请日：2021-12-30

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Ki Hyun Pyun ,  Hee Sook Park

IPC: G09G3/3258 ,  G09G3/00

CPC classification number: G09G3/3258 ,  G09G3/006 ,  G09G2310/027 ,  G09G2310/08 ,  G09G2330/12

Abstract: A display device includes: a display panel including pixels; a timing controller configured to generate image data based on input image data; a data driver configured to generate a data signal corresponding to the image data and supplying the data signal to the pixels; a power supply configured to supply a first power supply voltage to the display panel; and a power controller configured to calculate a load value and a peak grayscale of the entire display panel based on the input image data, receive feedback voltages of the first power supply voltage from relatively lower quality areas in which IR drop of the first power supply voltage occurs relatively more frequently, and generate a power control signal for changing the level of the first power supply voltage based on the load value, the peak grayscale, and the feedback voltages.

公开(公告)号：US20220215803A1

公开(公告)日：2022-07-07

申请号：US17646547

申请日：2021-12-30

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Ki Hyun PYUN ,  Hee Sook Park

IPC: G09G3/3258 ,  G09G3/00

Abstract: A display device includes: a display panel including pixels; a timing controller configured to generate image data based on input image data; a data driver configured to generate a data signal corresponding to the image data and supplying the data signal to the pixels; a power supply configured to supply a first power supply voltage to the display panel; and a power controller configured to calculate a load value and a peak grayscale of the entire display panel based on the input image data, receive feedback voltages of the first power supply voltage from relatively lower quality areas in which IR drop of the first power supply voltage occurs relatively more frequently, and generate a power control signal for changing the level of the first power supply voltage based on the load value, the peak grayscale, and the feedback voltages.

公开(公告)号：US11257412B2

公开(公告)日：2022-02-22

申请号：US17088056

申请日：2020-11-03

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Ki Hyun Pyun ,  Hee Sook Park

IPC: G09G3/20

Abstract: A display device includes a display panel having a plurality of pixels, a controller configured to determine a peak luminance based on a target luminance and a black duty ratio that is a ratio of a black insertion period to a sum of an image display period and the black insertion period, to determine gray-luminance information representing a plurality of luminances respectively corresponding to a plurality of gray levels based on the peak luminance and a target gamma value, and to generate gray-voltage information representing a plurality of voltage levels respectively corresponding to the plurality of gray levels based on a target white color coordinate and the gray-luminance information, a gray voltage generator configured to generate a plurality of gray voltages having the plurality of voltage levels based on the gray-voltage information, and a data driver configured to provide the plurality of gray voltages corresponding to output image data as data voltages to the plurality of pixels in the image display period, and to provide a black data voltage to the plurality of pixels in the black insertion period.

公开(公告)号：US11094275B2

公开(公告)日：2021-08-17

申请号：US16673768

申请日：2019-11-04

Applicant: Samsung Display Co., Ltd.

Inventor： Jae Hoon Lee ,  Seung Ho Park ,  Hee Sook Park ,  Kyoung Ho Lim

IPC: G09G5/10 ,  G09G3/36

Abstract: An afterimage compensator and a display device having the same are disclosed, and the afterimage compensator includes an image analyzer configured to determine an amount of image variation based on a change of image data, and an image shifter configured to adjust a shift interval, which is an interval between time points at which an image is shifted, according to the amount of image variation.

公开(公告)号：US11875732B2

公开(公告)日：2024-01-16

申请号：US17386700

申请日：2021-07-28

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Hee Sook Park ,  Ki Hyun Pyun

IPC: G09G3/22

CPC classification number: G09G3/22 ,  G09G2300/0439 ,  G09G2330/022

Abstract: A screen saver controller includes a load calculator for generating load data of each of a plurality of panel blocks included in a display panel based on input image data, a life calculator for generating life data of each of the panel blocks based on a deterioration stress value accumulated in the display panel, a first logic circuit for receiving the load data and the life data, and generating operation data based on the load data and the life data and a second logic circuit for receiving the input image data and the operation data, and generating screen saver data based on the input image data and the operation data. The screen saver controller adjusts a luminance of the display panel based on the screen saver data when operating in a screen saver mode for performing a screen saver operation.

公开(公告)号：US11854454B2

公开(公告)日：2023-12-26

申请号：US16942200

申请日：2020-07-29

Applicant: Samsung Display Co., Ltd.

Inventor： Ki Hyun Pyun ,  Hee Sook Park

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

CPC classification number: G09G3/2007 ,  G09G3/3233 ,  G09G3/3275 ,  G09G2310/027 ,  G09G2330/023 ,  G09G2330/028

Abstract: A display device includes blocks each including two or more pixels commonly coupled to a first power line, and a first power voltage controller for determining a margin value of a first power voltage supplied to the first power line, based on load values of the blocks. The first power voltage controller determines the load values based on grayscale values of the pixels included in each of the blocks. The magnitude of the first power voltage is determined to become smaller as the margin value becomes larger. The margin value includes a first margin value. The first power voltage controller determines the first margin value according to a degree of distribution of load values of first blocks arranged in a first direction among the blocks.

公开(公告)号：US11368159B2

公开(公告)日：2022-06-21

申请号：US17185813

申请日：2021-02-25

Applicant: Samsung Display Co., Ltd.

Inventor： Ki Hyun Pyun ,  Hee Sook Park

IPC: H03L7/08 ,  G09G5/00

Abstract: A clock data recovery circuit includes a phase-locked loop circuit generating a multi-phase clock signal based on input data, the phase-locked loop circuit including a multi-rate phase detector being operable at an initial rate among a plurality of rates in an initial period; a lock detector generating a lock-enable signal by detecting a lock state of the phase-locked loop circuit; a dead zone calibration circuit determining an operational rate corresponding to a data rate of the input data among the plurality of rates in response to the lock-enable signal; and a digital block controlling the multi-rate phase detector to operate at the operational rate, and generating a calibration-enable signal. The dead zone calibration circuit determines whether the multi-phase clock signal is locked within a dead zone in response to the calibration-enable signal, and changes a phase of the multi-phase clock signal based on the multi-phase clock signal.

公开(公告)号：US20220122517A1

公开(公告)日：2022-04-21

申请号：US17386700

申请日：2021-07-28

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Hee Sook Park ,  Ki Hyun Pyun

IPC: G09G3/22

Abstract: A screen saver controller includes a load calculator for generating load data of each of a plurality of panel blocks included in a display panel based on input image data, a life calculator for generating life data of each of the panel blocks based on a deterioration stress value accumulated in the display panel, a first logic circuit for receiving the load data and the life data, and generating operation data based on the load data and the life data and a second logic circuit for receiving the input image data and the operation data, and generating screen saver data based on the input image data and the operation data. The screen saver controller adjusts a luminance of the display panel based on the screen saver data when operating in a screen saver mode for performing a screen saver operation.

公开(公告)号：US11189226B2

公开(公告)日：2021-11-30

申请号：US17036765

申请日：2020-09-29

Applicant: Samsung Display Co., Ltd.

Inventor： Ki Hyun Pyun ,  Hee Sook Park

IPC: G09G3/3233

Abstract: The present disclosure provides a display device. The display device includes a gain provider for gradually decreasing a gain value from a first time when a first period elapses from a time at which an enable signal is generated, and a plurality of pixels for receiving data voltages determined by the gain value and the input grayscale values. The gain provider determines a length of the first period according to a first load value based on the input grayscale values at the time at which the enable signal is generated.