公开(公告)号：US20220215798A1

公开(公告)日：2022-07-07

申请号：US17380243

申请日：2021-07-20

Applicant: Samsung Display Co., Ltd.

Inventor： KIHYUN PYUN ,  GEONHWI PARK ,  Jungeon An

IPC: G09G3/3208

Abstract: An organic light emitting diode (“OLED”) display device, which operates in a variable frame mode, includes a display panel including a plurality of pixels, a power management circuit which supplies a power supply voltage to the plurality of pixels, and a controller which determines a panel load, a first representative gray level and a second representative gray level by analyzing input image data, determines an initial level of the power supply voltage based on the panel load and the first representative gray level, and determines a step level of the power supply voltage based on the panel load and the second representative gray level. The power management circuit generates the power supply voltage having the initial level during an active period, and gradually increases a voltage level of the power supply voltage from the initial level based on the step level during a variable blank period.

公开(公告)号：US11955069B2

公开(公告)日：2024-04-09

申请号：US18096795

申请日：2023-01-13

Applicant: Samsung Display Co., Ltd.

Inventor： Jungeon An ,  Kihyun Pyun

IPC: G09G3/3208

CPC classification number: G09G3/3208 ,  G09G2320/0233 ,  G09G2320/0257 ,  G09G2320/0271 ,  G09G2330/021

Abstract: A display device includes a first gain provider which controls a first gain value during a first display period in which a still image is displayed, a second gain provider which controls a second gain value during a second display period in which a moving image including a still area is displayed, and a grayscale converter which applies the first gain value or the second gain value to an input image and generates an output image. The first gain provider linearly or exponentially increases the first gain value to a maximum gain value based on a load of the still image from a first time point when the second display period changes to the first display period to a second time point at which the first gain value starts to decrease from the maximum gain value.

公开(公告)号：US20240242646A1

公开(公告)日：2024-07-18

申请号：US18539670

申请日：2023-12-14

Applicant: Samsung Display Co., Ltd.

Inventor： KIHYUN PYUN ,  Jungeon An

IPC: G09G3/00 ,  G09G3/20

CPC classification number: G09G3/006 ,  G09G3/2096 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2310/08 ,  G09G2320/0257 ,  G09G2330/021 ,  G09G2330/028

Abstract: A display device includes a display panel including pixels, a gate driver configured to output a first gate signal for writing data voltages to the pixels and a second gate signal for applying an initialization voltage to the pixels, which have activation levels, to the pixels in a misconnection detection period, a data driver configured to output the data voltages to the pixels in the misconnection detection period, a power voltage generator electrically connected to the data driver through a cable and configured to output a first power voltage to the display panel in the misconnection detection period, and a timing controller electrically connected to the data driver through the cable and configured to perform a protection operation by detecting misconnection of the cable based on the first power voltage in the misconnection detection period.

公开(公告)号：US20240221647A1

公开(公告)日：2024-07-04

申请号：US18383048

申请日：2023-10-24

Applicant: Samsung Display Co., Ltd.

Inventor： Jungeon An ,  KIHYUN PYUN

IPC: G09G3/3233 ,  G09G3/20

CPC classification number: G09G3/3233 ,  G09G3/2007 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2320/0233 ,  G09G2320/043

Abstract: A display device includes a display panel including pixels, and a panel driver configured to sequentially apply data voltages to the pixels on a row basis in an active period of a frame period, and to perform a sensing operation on at least one pixel of the pixels in a blank period of the frame period. Within the blank period, the panel driver applies a pre-charge data voltage to the at least one pixel after the sensing operation, and applies a previous data voltage to the at least one pixel after a predetermined time from a time point at which the pre-charge data voltage is applied.

公开(公告)号：US20230402015A1

公开(公告)日：2023-12-14

申请号：US18130671

申请日：2023-04-04

Applicant: Samsung Display Co., Ltd.

Inventor： KIHYUN PYUN ,  Jungeon An

IPC: G09G3/3275 ,  G09G3/3266

CPC classification number: G09G3/3275 ,  G09G3/3266 ,  G09G2310/027 ,  G09G2330/028 ,  G09G2330/021 ,  G09G2320/0247 ,  G09G2320/0271

Abstract: A display device includes pixels which displays an image based on image data, a driving voltage generator which provides a driving voltage to each of the pixels, and a driving voltage controller which calculates block pixel numbers corresponding to first to nth grayscale blocks based on the image data, calculates maximum grayscales with respect to the first to nth grayscale blocks based on the image data, determines a maximum grayscale block among the first to nth grayscale blocks by comparing the block pixel numbers to minimum pixel numbers corresponding to the first to nth grayscale blocks, determines a maximum grayscale with respect to the maximum grayscale block based on the maximum grayscales, calculates a load of the image data, calculates a voltage drop amount of the driving voltage based on the load, and calculates a magnitude of the driving voltage based on the maximum grayscale and the voltage drop amount.

公开(公告)号：US20230386401A1

公开(公告)日：2023-11-30

申请号：US18096795

申请日：2023-01-13

Applicant: Samsung Display Co., Ltd.

Inventor： Jungeon An ,  Kihyun PYUN

IPC: G09G3/3208

CPC classification number: G09G3/3208 ,  G09G2320/0271 ,  G09G2330/021 ,  G09G2320/0233 ,  G09G2320/0257

Abstract: A display device includes a first gain provider which controls a first gain value during a first display period in which a still image is displayed, a second gain provider which controls a second gain value during a second display period in which a moving image including a still area is displayed, and a grayscale converter which applies the first gain value or the second gain value to an input image and generates an output image. The first gain provider linearly or exponentially increases the first gain value to a maximum gain value based on a load of the still image from a first time point when the second display period changes to the first display period to a second time point at which the first gain value starts to decrease from the maximum gain value.

公开(公告)号：US11488524B2

公开(公告)日：2022-11-01

申请号：US17380243

申请日：2021-07-20

Applicant: Samsung Display Co., Ltd.

Inventor： Kihyun Pyun ,  Geonhwi Park ,  Jungeon An

IPC: G09G3/3208 ,  G09G3/20

Abstract: An organic light emitting diode (“OLED”) display device, which operates in a variable frame mode, includes a display panel including a plurality of pixels, a power management circuit which supplies a power supply voltage to the plurality of pixels, and a controller which determines a panel load, a first representative gray level and a second representative gray level by analyzing input image data, determines an initial level of the power supply voltage based on the panel load and the first representative gray level, and determines a step level of the power supply voltage based on the panel load and the second representative gray level. The power management circuit generates the power supply voltage having the initial level during an active period, and gradually increases a voltage level of the power supply voltage from the initial level based on the step level during a variable blank period.