Samsung Display Co., Ltd.

Samsung Mobile Display Co., Ltd.

Samsung Displayco., Ltd.

Choonyul Oh

Jun-Ho Hwang

Si-Beak Pyo

Jong-Kwang Hwang

Sunjoon Hwang

Sungcheon Park

Dongjun Han

Kyoungsoo Lee

A display device includes a display panel, a dimming controller, and a panel driver. The display panel includes a plurality of pixels. The dimming controller generates at least one temporary voltage set by performing a first interpolating operation using a (j)th band voltage set and a (j+1)th band voltage set among first through (i)th band voltage sets corresponding to first through (i)th dimming bands, respectively, and generates a grayscale gamma voltage set corresponding to target luminance by performing a second interpolating operation using the temporary voltage set and the (j)th band voltage set. The panel driver drives the display panel by converting image data into a data signal based on the grayscale gamma voltage set and by providing the data signal to the pixels.

Display device and related operating method involving dimming control

In a method of operating a display device, it is determined whether an image represented by input image data is a single color image, it is determined whether the image represented by the input image data is a low gray image, compensated image data are generated by adding sub-pixel data corresponding to a color different from a color of the single color image to the input image data when the image represented by the input image data is the single color image and the low gray image, and an image is displayed based on the compensated image data.

Display device performing low gray single color image compensation, and method of operating the display device

An organic light emitting display keeps a constant grayscale in an organic light emitting display panel even if power supplied by a power supply is changed. The organic light emitting display includes: a switching unit for selecting and outputting a first source power or a second source power as a first reference power; a comparator for comparing the first reference power with the second source power and outputting a difference value between the first reference power and the second source power; an adder for adding the difference value to an initial second reference power to output as a second reference power, such that a voltage level of the second reference power is changed when a voltage level of the first reference power is changed; and a gamma voltage generator for generating plural gamma voltages to be utilized for displaying the image on an organic light emitting display panel by utilizing the first and second reference powers.

Active matrix organic light emitting display

Growing community of inventors

Seongnam-si, South Korea

Choonyul Oh