Samsung Display Co., Ltd.

Min-Weun Kim

Sung-Yeol Baek

Dowon Kim

Jeong-Geun Yoo

Yoon Ho Kang

Bo Young An

Dong Rock Seo

Hee-Chul Lee

Sang Rak Kim

Seong-Keun Ha

Sang-Rak Kim

An electronic device includes a display layer, a data driving circuit, a scan driving circuit, a driving controller, and a temperature sensor which measures a temperature of the display layer to generate temperature data. The driving controller includes a first lookup table calculating unit which calculates a first lookup table based on the image signal, the temperature data, and a reference lookup table set for each of a plurality of gray levels, a luminance compensating unit which calculates a luminance weight based on luminance data, and a second lookup table calculating unit which calculates a second lookup table based on the first lookup table and the luminance weight, and the driving controller generates the image data based on the image signal and the second lookup table.

Electronic device and driving method of electronic device

A display device includes a luminance correction unit that corrects input data based on a dimming code value and outputs correction data, a gamma correction unit that corrects the correction data and generates output data, a gamma voltage generator that generates gamma voltages depending on a first voltage code value, a data driver that converts the output data into data voltages based on the gamma voltages, and a controller that supplies the dimming code value and the input data to the luminance correction unit and provides the first voltage code value to the gamma voltage generator. The controller compares a highest dimming compares a highest dimming grayscale value of the output data determined by the dimming code value with a highest reference grayscale value and updates the first voltage code value with a second voltage code value.

Display device and driving method of the same

A display apparatus includes a display panel, a timing controller, and a data driver. The display panel includes subpixels for displaying images. The timing controller accumulates a count value when a same grayscale value repeats for one of the subpixels, determines a boundary portion of the image based on the accumulated count value, and generates a data signal to compensate the boundary portion. The data driver converts the data signal to a data voltage for the display panel.

Display apparatus with image retention compensation and method of driving display panel using the same

A touch display device includes a touch sensor, a visual accelerator, and a display. The touch sensor senses a touch. The visual accelerator visualizes the touch. The display displays information corresponding to the visualized touch. When the touch is outside a visual acceleration area, the visual accelerator does not process the touch. When the touch is in the visual acceleration area, the visual accelerator visualizes the touch on the display.

Touch display device including visual accelerator

An organic light emitting display device includes a display panel including an organic light emitting diode, a power supply including a DC-DC converter that generates a driving voltage for the organic light emitting diode and that provides the driving voltage to the display panel, the DC-DC converter including an inductor and a switch, and an over-current prevention unit that blocks supply of the driving voltage when a value of a current flowing through the inductor is greater than a reference value.

Organic light emitting display device

An organic light emitting display device includes a scan driving unit configured to provide a scan signal to pixel circuits via a plurality of scan lines, a data driving unit configured to provide a data signal to the pixel circuits via a plurality of data lines, a power unit configured to provide a first power voltage and a second power voltage to the pixel circuits, the first power voltage being greater than the second power voltage, a gamma reference voltage generating unit configured to generate a gamma reference voltage corresponding to a voltage difference between the first power voltage and a subtraction reference voltage, a gamma voltage generating unit configured to generate a plurality of gamma voltages based on the gamma reference voltage, and to provide the gamma voltages to the data driving unit, and a timing control unit.

Organic light emitting display device, and method of generating a gamma reference voltage for the same

An apparatus for generating gray scale voltage includes a brightness/color coordinate correction unit having a gamma table including data corresponding to an image displayed on a pixel unit of an OLED device at a first brightness level, and a gamma reference voltage look-up table including voltage values of red, green, and blue data corresponding to each gray scale and brightness values at the first brightness level in accordance with the gamma table, a gamma control signal output unit configured to output a gamma reference voltage control signal corresponding to a second brightness level in accordance with the gamma table and the gamma reference voltage look-up table, and a gamma correction circuit configured to receive the gamma reference voltage control signal, to generate gray scale voltages corresponding to the second brightness level, and to output the generated gray scale voltages to a data driver.

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Seoul, South Korea

Min-Weun Kim