公开(公告)号：US11908370B2

公开(公告)日：2024-02-20

申请号：US18109106

申请日：2023-02-13

Applicant: Samsung Display Co., Ltd.

Inventor： Geonhwi Park ,  Hyunjoo Seo ,  Kihyun Pyun

IPC: G09G3/20

CPC classification number: G09G3/2007 ,  G09G3/2096 ,  G09G2320/0233 ,  G09G2320/0276 ,  G09G2320/0626 ,  G09G2320/0666 ,  G09G2360/16

Abstract: A method of operating a display apparatus includes the following steps: calculating a first color reference luminance ratio, a second color reference luminance ratio, and a third color reference luminance ratio for a reference grayscale value; calculating first color target luminance ratios, second color target luminance ratios, and third color target luminance ratios for adjustment target grayscale values; generating first adjustment values, second adjustment values, and third adjustment values based on the first, second, and third color reference luminance ratios and the first, second, and third color target luminance ratios; performing gamma conversions of first, second and third colors using the first, second, and third adjustment values for the adjustment target grayscale values; using results of the gamma conversions to generate data voltages; and using the data voltage and a display panel of the display apparatus to emit or transmit light for displaying an image.

公开(公告)号：US11749164B2

公开(公告)日：2023-09-05

申请号：US17876490

申请日：2022-07-28

Applicant: Samsung Display Co., LTD.

Inventor： Kihyun Pyun ,  Jang-Mi Lee

IPC: G09G3/20

CPC classification number: G09G3/2007 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2310/027 ,  G09G2310/08 ,  G09G2320/0276 ,  G09G2330/028

Abstract: A controller to drive a display includes a voltage code generator and a voltage code compensator. The voltage code generator is configured to generate a first voltage code to drive pixels in the display based on input image data. The voltage code compensator is to generate a second voltage code to drive the pixels by compensating zero-grayscale codes of the first voltage code based on the zero-grayscale codes of the first voltage code, one-grayscale codes of the first voltage code, and the input image data.

公开(公告)号：US11727871B2

公开(公告)日：2023-08-15

申请号：US17361840

申请日：2021-06-29

Applicant: Samsung Display Co., Ltd.

Inventor： Kihyun Pyun ,  Minyoung Park ,  Eunjin Choi

IPC: G09G3/3233

CPC classification number: G09G3/3233 ,  G09G2310/027 ,  G09G2320/0233 ,  G09G2320/0666

Abstract: A display device includes a display panel which displays an image, a current compensator and a panel driver. The current compensator calculates a load based on input image data and compensates the input image data to output compensation image data having a target current corresponding to the load. The panel driver drives the display panel based on the compensation image data. The current compensator calculates the load for the input image data based on a combination of load weights calculated by different variables.

公开(公告)号：US11699380B2

公开(公告)日：2023-07-11

申请号：US17891861

申请日：2022-08-19

Applicant: Samsung Display Co., Ltd.

Inventor： Heesook Park ,  Kihyun Pyun

IPC: G09G3/20

CPC classification number: G09G3/2007 ,  G09G2310/027 ,  G09G2310/0232 ,  G09G2310/0267 ,  G09G2310/08 ,  G09G2320/046

Abstract: An embodiment of a display apparatus includes a display panel, a driving controller, and a data driver. In operation the driving controller determines a gain reducing area based on an edge load of input image data corresponding to an edge area of the display panel and compensates a grayscale value of the input image data corresponding to the gain reducing area to generate a data signal. The data driver converts the data signal to a data voltage and outputs the data voltage to the display panel.

公开(公告)号：US11587488B2

公开(公告)日：2023-02-21

申请号：US17582458

申请日：2022-01-24

Applicant: Samsung Display Co., Ltd.

Inventor： Kihyun Pyun ,  Wonjin Seo

IPC: G09G3/20

Abstract: A display apparatus include a display panel and a display panel driver. The display panel includes a panel block. The display panel driver senses a driving current to generate a sensing current, generates a temperature weight of the panel block based on the sensing current and location information of a circuit component, generates a load value of the panel block based on input image data, and generates a predicted temperature of the panel block based on the temperature weight of the panel block and the load value of the panel block.

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.

公开(公告)号：US11257431B2

公开(公告)日：2022-02-22

申请号：US17192779

申请日：2021-03-04

Applicant: Samsung Display Co., Ltd.

Inventor： Kihyun Pyun ,  Siduk Sung

IPC: G09G3/3233 ,  G09G3/3266 ,  G09G3/3291

Abstract: A display device includes a switch, an initialization line, a capacitor, a data line, a first transistor, a second transistor, a driving transistor, and a diode. The capacitor includes a first electrode and a second electrode. To the first electrode through at least the initialization line, the switch may output a first voltage in a first period of a horizontal time and may output a second voltage unequal to the first voltage in a second period of the horizontal time. The first transistor may connect the data line to the first electrode in response to a scan signal. The driving transistor may provide a driving current based on a voltage of the first electrode. The second transistor may connect the initialization line to the second electrode in response to an initialization signal. The diode may emit light based on the driving current.

公开(公告)号：US10777108B2

公开(公告)日：2020-09-15

申请号：US16190423

申请日：2018-11-14

Applicant: Samsung Display Co., Ltd.

Inventor： Kihyun Pyun ,  Seung-woon Shin

IPC: G09G3/00 ,  G09G3/36

Abstract: A display device includes a display panel which includes gate lines and data lines, a gate driver electrically connected to the gate lines, a temperature sensor which includes at least three temperature sensing circuits which are disposed adjacent to the gate driver, and a voltage generating circuit which outputs a test voltage to each of the temperature sensing circuits and outputs a clock signal, which is compensated based on a result voltage having a lowest voltage level among result voltages provided from the temperature sensing circuits, to the gate driver.

公开(公告)号：US10593288B2

公开(公告)日：2020-03-17

申请号：US16016437

申请日：2018-06-22

Applicant: Samsung Display Co., Ltd.

Inventor： Kihyun Pyun ,  Sung-jun Kim ,  Yunmi Kim ,  Juhyun Kim ,  Minyoung Park

IPC: G09G5/00 ,  H04L7/033 ,  G09G3/20

Abstract: A source driver of a display apparatus includes a receiving controller receiving a first status information signal and outputting a second status information signal and a receiving circuit receiving a transmission signal in response to the second status information signal and recovering the transmission signal to receiving data. The receiving controller includes a transition detection circuit detecting a transition of the first status information signal and outputting a transition detection signal, a delay circuit delaying the transition detection signal by a predetermined time and outputting a delay detection signal, and an output circuit receiving the first status information signal and outputting the second status information signal in response to the delay detection signal.

公开(公告)号：US20190156761A1

公开(公告)日：2019-05-23

申请号：US16186925

申请日：2018-11-12

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Yunmi Kim ,  Kihyun Pyun ,  Sung-in Kang

IPC: G09G3/3266 ,  G09G3/36 ,  H03L7/099 ,  H03L7/089 ,  H03L7/197

Abstract: A timing controller of a display device controls a gate driver of the display device. The timing controller includes a clock generator configured to provide a gate clock signal to the gate driver by modulating the gate clock signal with a first modulation pattern in a first frame period and by modulating the gate clock signal with a second modulation pattern different from the first modulation patter in a second frame period.