Samsung Display Co., Ltd.

Jong-Woong Park

Joo-Hyung Lee

Yong-Seok Choi

Byung-Ki Chun

Geun-Young Jeong

Won-Woo Jang

Ji-Yeon Yang

Sang-Jin Pak

Bo-Young An

Se-Il Cho

Dong-Wook Yang

Gun-Hee Chung

Jun-Jin Kong

Hong-Rak Son

Hyun-Seuk Yoo

Dong-Won Lee

Ho-Suk Maeng

Jeong-Eun Kim

Jae-Shin Kim

Jeongeun Kim

Ju-Hyung Lee

Chang-Kyu Seol

Seung-Kyu Lee

Wook Su Lee

Kyungsu Lee

Hak-Sun Kim

Hee-Chul Hwang

Chang-Ho Hyun

Byung-Hyun Kim

Youngsoo Sohn

Suk Hoon Ku

Junhan Ko

Weonjun Choe

Wonju Shin

SeokJeong Song

Seok Jeong Song

Jiyeon Baik

Madhusudan Singh

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.

Data compensating circuit, display device including the same, and method of compensating data using the same

A data compensating circuit includes a stress data generating block which generates stress data for each pixel based on input image data or output image data, a memory control block which updates accumulated stress data for each pixel, a first compensating block which reads the accumulated stress data for each pixel from a first non-volatile memory device to generate afterimage compensation data for each pixel, a compensation data summing block which reads optical compensation data for each pixel from a second non-volatile memory device to generate luminance compensation data for each pixel by summing the afterimage compensation data for each pixel and the optical compensation data for each pixel, an internal memory device which stores the luminance compensation data for each pixel, and a second compensating block which generates the output image data by compensating for the input image data based on the luminance compensation data for each pixel.

Data compensating circuit and display device including the same

A driving controller includes a compensator that calculates a compensation value based on first accumulated stress, and outputs an output image signal by compensating for the input image signal with the compensation value, a stress converter that converts the output image signal into current stress in response to an enable signal, an accumulation stress calculator that outputs second accumulated stress by adding the first accumulated stress and the current stress in response to the enable signal, a memory that stores the second accumulated stress and provides the first accumulated stress to the compensator and the accumulation stress calculator, and an operating time calculator that receives a current operating frequency and outputs the enable signal of an active level based on the current operating frequency.

Driving controller, display device including the same and operating method of display device

A method of driving a display panel that includes first and second display-regions includes: determining maximum luminance data among first data including first red data, first green data, and first blue data for the first display-region, calculating a threshold gray-level based on a luminance gain, a gray-level of the maximum luminance data, and a gamma value for the display panel, selecting a smaller value between the threshold gray-level and a maximum gray-level as a gain determination gray-level, calculating a compensation gain obtained by dividing the gain determination gray-level by the gray-level of the maximum luminance data, generating first compensated data by applying the compensation gain to the first data, displaying a first-image in the first display-region based on the first compensated data, and displaying a second-image in the second display-region based on second data including second red data, second green data, and second blue data for the second display-region.

Method of driving a display panel that includes a first display region having a first resolution and a second display region being adjacent to the first display region and having a second resolution higher than the first resolution

An image processing device includes an image determiner which determines whether an image data is a still image or a motion picture image, a first compensator which gradually changes a scaling ratio of the image data of which a center part is fixed and a second compensator which divides the image data into a plurality of sub-image data and change a scaling ratio of the sub-image data.

Image processing device controlling scaling ratio of sub-image data and display device including the same

A display device includes a display panel including a plurality of pixels, the display panel having an active region in which an image is displayed and an inactive region adjacent to the active region, an image processor setting image data of the inactive region to dummy data, and performing a rendering operation for a boundary pixel of the plurality of pixels based on the dummy data to generate output image data, the boundary pixel located in the active region and adjacent to the inactive region, and a panel driver providing a driving signal to the display panel to display the image corresponding to the output image data.

Method of driving display device and display device for performing the same

A 3-dimensional (3D) flat panel display with a built-in touch screen panel includes a first substrate, a plurality of pixels on the first substrate, a plurality of first electrode patterns spaced apart from one another at a first predetermined interval along a first direction, the plurality of first electrode patterns for driving the plurality of pixels, a second substrate positioned to face the first substrate, and a plurality of barrier patterns formed on an outer surface of the second substrate and spaced apart from one another at a second predetermined interval along a second direction, intersecting the first direction. At least one of the plurality of first electrode patterns and at least one barrier pattern of the plurality of barrier patterns serve as electrodes for the built-in touch screen panel.

3-dimensional flat panel display with built-in touch screen panel

An electronic device includes an organic light emitting diode (OLED) display device, and a display controller configured to provide image data to the OLED display device. The display controller calculates stress data for the OLED display device by accumulating the image data, and determines a compensation factor for the OLED display device based on the stress data. The OLED display device receives the image data and the compensation factor from the display controller, converts the image data into compensated image data based on the compensation factor, and displays an image based on the compensated image data.

Electronic device including an organic light emitting diode display device, and a method of compensating for a degradation of an organic light emitting diode display device in an electronic device

An image sticking controller includes a gamma conversion unit configured to gamma-convert gray scale values respectively corresponding to a plurality of pixels, and to output the gamma-converted gray scale values as gamma conversion values, a data accumulation unit configured to accumulate the gamma conversion values into an accumulation data, the accumulation data including a minimum accumulation value, a maximum difference value indicating a difference between the minimum accumulation value and a maximum accumulation value, and difference values indicating respective differences between the minimum accumulation value and an accumulation value of each of the pixels, an image sticking analysis unit configured to output an image sticking decrease control signal when the maximum difference value is greater than a reference value, and a data conversion unit configured to convert the gray scale values in response to the image sticking decrease control signal, such that image sticking is reduced.

Image sticking controller and method for operating the same

A controller for a display device includes an adjuster and a compensator. The adjuster adjusts at least one parameter of a modeling equation based on a measured current of a pixel. The modeling equation including the at least one adjusted parameter is indicative of a real time degree of degradation of the pixel. The compensator compensates for image data corresponding to emission of light from the pixel.

Organic light emitting display and method for driving the same

A plurality of data signals to be supplied to a first pixel and a second pixel formed by a first sub-pixel, two second sub-pixels, and two third sub-pixels on the display panel are rendered. Input data corresponding to a first sampling window with respect to the second sub-pixel of the first pixel among the input data applied to the stripe pattern is used to render a second data signal supplied to the second sub-pixel through filtering sampled input data for a color of the second sub-pixel. The first data signal to be supplied to the first sub-pixel is rendered through filtering of the input data of a second window unit for a color of the first sub-pixel with respect to the first sub-pixel of the first pixel among the sampled input data.

Data rendering method and data rendering device performing sub pixel rendering

A method for driving an electroluminescent display device includes grouping pixels in a display panel into a plurality of pixel groups, each pixel group including a plurality of rows and a plurality of columns. Accumulated block stress values are provided based on input image data. Each accumulated block stress value represents a degree of degeneration of the pixels in each pixel block. Corrected stress values are provided by correcting each accumulated block stress value based on the accumulated block stress values of the adjacent pixel blocks. Input image data is corrected based on the corrected stress values.

Electroluminescent display device and method of driving the same to compensate for degeneration of pixels

A degradation compensating device includes an accumulator configured to accumulate stress data every pixel block, a memory configured to receive the stress data from the accumulator, and to load accumulated data from an external flash memory when a display device power is turned on, the accumulated data being a total sum of the stress data, a compensation factor calculator configured to determine a target compensation factor based on the accumulated data to compensate image data, and to apply an initial compensation factor to the target compensation factor during a wake-up period after loading the accumulated data is completed, the initial compensation factor being changed gradually during the wake-up period, and a data compensator configured to generate image compensation data based on the target compensation factor, and to generate initial image data based on a wake-up factor that is an adjusted target compensation factor based on the initial compensation factor.

Degradation compensating device, organic light emitting display device having the same, and method for driving organic light emitting display device

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Yongin, South Korea

Jong-Woong Park