Samsung Display Co., Ltd.

Geonhwi Park

Kihyun Pyun

Jang-Mi Lee

Eunjin Choi

Jungeon An

Hyunjoo Seo

A display device may include a display panel including pixels, and a display panel driver. The display panel driver may receive an input image, detect a first pattern from input image data of the input image, determine a luminance weight for each color based on a luminance of the input image of the first pattern and a luminance of a reference image of a second pattern, apply, in response to detecting of the first pattern, the luminance weight to data voltages to determine compensation data voltages, and apply the compensation data voltages to the pixels.

Display device

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.

Display device, method of driving display device, and electronic apparatus including display device

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.

Method of driving display panel and display apparatus for performing the same

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.

Growing community of inventors

Anyang-si, South Korea

Geonhwi Park