公开(公告)号：US12217677B2

公开(公告)日：2025-02-04

申请号：US18230668

申请日：2023-08-07

Applicant: Samsung Display Co., Ltd.

Inventor： Eunjin Choi ,  Geonhwi Park ,  Jang-Mi Lee ,  Kihyun Pyun

IPC: G09G3/3233 ,  G09G3/32

Abstract: A display device includes a display panel displaying an image based on output image data, a voltage curve controller generating a converted peak luminance, a converted full white luminance, a converted peak grayscale, and a converted full white grayscale from a reference peak luminance and a reference full white luminance based on a gain mode and a gain value, and generating converted voltage curves including a first converted voltage curve from a first reference voltage curve based on the converted peak grayscale and the converted full white grayscale, and a driving voltage controller generating a driving voltage from the converted voltage curves based on a load and a maximum grayscale value of input image data. A voltage of the first converted voltage curve with respect to a peak grayscale is equal to a voltage of the first reference voltage curve with respect to the converted peak grayscale.

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：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.