Samsung Display Co., Ltd.

Seok Jeong Song

Jong-Woong Park

Jong Woong Park

Suk Hoon Ku

Ji Yeon Baik

A display device includes: a pixel; a grayscale converter that applies a compensation value to generate an output grayscale; and a controller that provides a data voltage corresponding to the output grayscale to the pixel. The grayscale converter generates first stress value and second stress value based on the output grayscale, adds the first stress value to a first stress accumulation value to which a first accumulation coefficient is applied to update the first stress accumulation value, adds the second stress value to a second stress accumulation value to which a second accumulation coefficient is applied to update the second stress accumulation value, and generates the compensation value based on the first stress accumulation value and the second stress accumulation value. The first accumulation coefficient and the second accumulation coefficient are different from each other.

Display device and driving method thereof

A data compensation circuit includes a reference frame memory device which stores reference frame data, an accumulated stress memory device which stores cumulative stress data for each of pixels, a stress data generating block which compares output image data with the reference frame data to generate stress data for each of the pixels, a memory control block which adds the stress data to the cumulative stress data to update the cumulative stress data and a compensating block which generates the output image data by generating afterimage compensation data for each of the pixels based on the cumulative stress data and compensating input image data based on the afterimage compensation data.

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YONGIN-SI, South Korea

Seok Jeong Song