Abstract: A display device includes at least one pixel configured to receive a voltage of an initialization power source, which is supplied to an anode electrode of a light emitting element, when an enable scan signal is supplied to a scan line, and a scan driver. The scan driver is configured to supply the enable scan signal to the scan line. The enable scan signal supplied to the scan line by the scan driver has a same width during an active area of a frame regardless of an image refresh rate, and the width of the enable scan signal supplied to the scan line is changed by the scan driver during a blank area of the frame, corresponding to the image refresh rate.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A display device includes a display panel including a gate line, a data line, and a pixel at a crossing region of the gate line and the data line, a timing controller configured to generate a gate driving control signal, a data driving control signal, and a power control signal based on a display period corresponding to a time interval of frames, a gate driver configured to provide a gate signal to the pixel through the gate line based on the gate driving control signal, a data driver configured to provide a data signal to the pixel through the data line based on the data driving control signal, and a power supply configured to generate a power voltage to drive the pixel, and configured to adjust the power voltage based on the power control signal during the display period.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A display device includes a display panel which displays an image, a panel driving block which provides a data signal to the display panel, and a temperature measuring part which measures a temperature of the display panel and provides a measurement temperature to the panel driving block. The panel driving block includes a first memory which stores a reference gamma voltage corresponding to a predetermined reference temperature, a temperature difference calculating part which calculates a temperature difference between the reference temperature and the measurement temperature, and a compensation part which generates a correction gamma voltage by correcting the reference gamma voltage based on the temperature difference between the reference temperature and the measurement temperature. The data signal is generated based on the correction gamma voltage and the image signal.

Abstract: A display device includes a display panel which displays an image, a panel driving block which provides a data signal to the display panel, and a temperature measuring part which measures a temperature of the display panel and provides a measurement temperature to the panel driving block. The panel driving block includes a first memory which stores a reference gamma voltage corresponding to a predetermined reference temperature, a temperature difference calculating part which calculates a temperature difference between the reference temperature and the measurement temperature, and a compensation part which generates a correction gamma voltage by correcting the reference gamma voltage based on the temperature difference between the reference temperature and the measurement temperature. The data signal is generated based on the correction gamma voltage and the image signal.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.