Samsung Display Co., Ltd.

Si Beak Pyo

Seung Kyu Lee

Choon Yul Oh

Jun Ho Hwang

Hyun Jung Son

Sung Kook Kim

Yoon Gyu Lee

Min Seong Son

Jong Kwang Hwang

Young Uk Hwang

Won Ju Shin

Hyun Yeul Lee

Sung Jin Kim

Soo Young Kim

Young Nam Yun

Seung Wook Nam

Hyun Seok Hong

Kyu Seok Kim

Ji Hye Moon

Min Tak Lee

Jae Woo Song

Sun Joon Hwang

Ye Ji Lee

Yeong Bong Kang

Young Kyo Seo

Jong Dae Lee

A display device includes: a pixel unit including a first area including first pixels disposed with a first density and a second area including second pixels disposed with a second density smaller than the first density; a power supply for supplying a first power voltage commonly supplied to cathodes of first light emitting elements of the first pixels; and a second-power voltage setting unit for setting a magnitude of a second power voltage commonly supplied to cathodes of second light emitting elements of the second pixels. When the pixel unit displays a black image, the second-power voltage setting unit sets the second power voltage to be higher than the first power voltage.

Organic light emitting display (OLED) device and method expressing desired black and white grayscales in areas of different pixel densities

A display device includes: a target pixel; observation target pixels located adjacent to the target pixel; and a grayscale corrector for converting an input grayscale value corresponding to the target pixel with reference to observation target grayscale values corresponding to the observation target pixels. The grayscale corrector includes: a light emitting pixel counter for providing a number of light emitting pixels by counting a number of observation target pixels that exceeds a reference value; and a grayscale converter for providing a converted grayscale value by converting the input grayscale value, based on the number of light emitting pixels.

Display device

The display device includes a display unit including pixels displaying first to third colors, a data driver that supplies a plurality of test voltages to the pixels in the display unit through data lines to display test images through the display unit, and a margin voltage setting unit that determines a dominant color based on test images displayed on the display unit and individually sets margin voltages corresponding to the first to third colors based on the dominant color.

Display device for setting margin voltage and method for operating the same

A display device includes a plurality of first pixels disposed in a first pixel area and initialized by a voltage of a first initialization power source, a plurality of second pixels disposed in a second pixel area and initialized by a voltage of a second initialization power source different from the first initialization power source, a data driver that supplies a data signal to a plurality of data lines connected to the first pixels and the second pixels, and a scan driver that supplies a scan signal to a plurality of scan lines connected to the first pixels and the second pixels. A black data signal supplied from the data driver to the first pixels and a black data signal supplied from the data driver to the second pixels are set to the same voltage.

Display device and method of driving the same

A display device includes: a plurality of pixels to receive data voltages based on converted grayscales; and a grayscale converter to: calculate first compensation offsets based on positions of the pixels and input grayscales for the pixels; convert the first compensation offsets into second compensation offsets according to a maximum luminance weight based on an input maximum luminance; and calculate the converted grayscales by applying the second compensation offsets to the input grayscales.

Display device and driving method thereof

A display device includes a display unit including a plurality of pixels coupled to a plurality of data lines, a plurality of scan lines, and a plurality of emission control lines, a controller for determining a width of a gate-off section of an emission control signal, which corresponds to a non-emission section of each of a plurality of frames belonging to a dimming period, in response to a dimming signal, and an emission driver for supplying the emission control signal in units of a plurality of consecutive pixel rows through the plurality of emission control lines.

Display device and method for driving the same

A display device includes a light emitting element, a timing controller, and an initialization power generator. The timing controller determines whether a second image associated with a second frame is different from a first image associated with a first frame. The second frame immediately follows the first frame. The initialization power generator is electrically connected to the timing controller, provides a reference voltage for initializing the light emitting element in the second frame when/if the second image is identical to the first image, and provides a first adjusted voltage unequal to the reference voltage for initializing the light emitting element in the second frame when/if the second image is different from the first image.

A display device includes a processor and a display panel for receiving observation grayscale values from the processor. The display panel includes a data driver for applying data voltages to data lines, a target pixel coupled to at least one of the data lines, and observation pixels each coupled to at least one of the data lines, and located adjacent to the target pixel. The display panel applies a first data voltage to the target pixel, when the observation grayscale values for the observation pixels exceed a reference value. The display panel applies a second data voltage to the target pixel, when at least one of the observation grayscale values does not exceed the reference value. The first data voltage and the second data voltage are different from each other.

Provided is an optical compensation method for a display device including a pixel coupled between first power and second power sources. In the optical compensation method, the first voltage level of the second power source corresponding to a first luminance level is set while measuring the luminance of the display device, the second voltage level of the second power source corresponding to a second luminance level is set while measuring the luminance of the display device, the third voltage levels of the second power source for representative luminance levels including the first and second luminance levels are set based on the first and second voltage levels, and the fourth voltage levels of the second power source for the representative luminance levels according to temperature conditions are set based on the third voltage levels and temperature offsets according to the temperature conditions, under which the display device is driven.

Optical compensation system and optical compensation method of display device

A display device includes: a pixel unit including a target pixel and peripheral pixels in a unit area set based on the target pixel; a converter configured to adjust a voltage level of a data voltage of the target pixel, based on light emission statuses of the peripheral pixels, and to determine a voltage level of a black voltage of at least one peripheral pixel which does not emit light among the peripheral pixels, based on the light emission statuses of the peripheral pixels; and a data driver configured to apply the data voltage to the target pixel, and to apply the black voltage to the at least one peripheral pixel which does not emit light.

A luminance control unit includes: a driving power voltage setting unit configured to determine a driving power voltage to be provided to a display panel, the driving power voltage corresponding to a target brightness, based on a plurality of driving power voltages respectively corresponding to a plurality of reference brightnesses of the display panel; and a gamma voltage setting unit configured to determine a target luminance corresponding to the target brightness, based on a plurality of target luminances respectively corresponding to the plurality of reference brightnesses, and to set gamma voltages for implementing the target luminance, wherein the driving power voltage and the gamma voltages are differently set with respect to the same reference brightness according to an ambient illumination intensity of the display panel.

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Yongin-si, South Korea

Si Beak Pyo