A display driver integrated circuit includes an input port configured to receive a display sensing signal for a display panel; a resistive random access memory coupled to the input port and configured to store a sensing value indicative of the display sensing signal; a display compensation logic coupled to the resistive random access memory to receive the sensing value and configured to determine, based on the sensing value, a compensation value to enable the display panel to modify a display control signal; and an output port coupled to the display compensation logic to transmit a display compensation voltage signal to the display panel. The display compensation voltage signal is generated based on the compensation value.

A driving controller includes: a grayscale determiner, which determines a current grayscale of input image data, a deterioration time determiner, which determines a first deterioration time for the current grayscale corresponding to an accumulated deterioration degree, a current deterioration degree calculator, which calculates a second deterioration time by summing the first deterioration time and a calculation period, and calculates a current deterioration degree for the current grayscale according to the second deterioration time, and an image compensator, which compensates the input image data based on the current deterioration degree.

A method for compressing and applying data of the sensing-less compensating system may be provided for a display device having subpixels. As the system can update an accumulated stress data of a subpixel which is accumulated according to a display driving data signal in a real time and perform a compensation, a real time compensation for a degradation of the subpixel can be performed without sensing the subpixel. Furthermore, as the system may provide a bit size information for restoration according to a comparison result of data subject to loss-compress and a loss reference value when loss-compressing the accumulated stress data, a loss ratio of a loss-compression data can be reduced. A display device and a sensing-less compensation system are also disclosed.

A display device includes a display unit, a degradation compensator and a data driver. The display unit includes first and second pixels disposed in first and second regions, respectively. The degradation compensator generates a first compensated grayscale value by compensating a first grayscale value for the first pixel based on a first degradation curve and generates a second compensated grayscale value by compensating a second grayscale value for the second pixel based on a second degradation curve, where the first and second degradation curves define luminance reduction rates according to accumulated usage time of the first and second pixels, respectively. A data driver generates first and second data signals based on the first and second compensated grayscale values, respectively, and supplies the first and second data signals to the first and second pixels, respectively. A transmittance of the second region is greater than a transmittance of the first region.

A display device includes: a display panel, which displays an image; a driving controller, which determines a gain reduction region based on input image data input to the display panel, and generates a data signal by correcting the input image data by applying a gain to the input image data to correspond to the gain reduction region; and a data driver, which converts the data signal into a data voltage to output the data voltage to the display panel. The driving controller is configured to generate first, second, and third data signals by correcting first, second, and third input image data input to first, second, and third regions of the display panel by applying first, second, and third gain values to the first, second, and third input image data, respectively.

An organic light-emitting diode (OLED) display device includes a display panel including a plurality of pixels, the plurality of pixels being grouped into a plurality of pixel blocks, a nonvolatile memory configured to store previous accumulated block degradation information for the plurality of pixel blocks up to a previous driving period, a controller configured to calculate current block degradation information for the plurality of pixel blocks in a current driving period, to calculate current accumulated block degradation information for the plurality of pixel blocks up to the current driving period by adding the current block degradation information to the previous accumulated block degradation information in response to a power control signal indicating a power-off, and to determine whether a sensing operation for each of the plurality of pixel blocks is to be performed by comparing the current accumulated block degradation information for each of the plurality of pixel blocks with a sensing reference degradation amount, and a sensing circuit configured to selectively perform the sensing operation for each of the plurality of pixel blocks.

A method for evaluating a lifespan of an organic light emitting display panel includes: aging an organic light emitting display panel, including first light emitting elements for emitting a first color, second light emitting elements for emitting a second color, and third light emitting elements for emitting a third color, during a preset aging period by displaying the first color in a first pattern area of the organic light emitting display panel and displaying a fourth color in a second pattern area of the organic light emitting display panel; measuring luminances of the first pattern area and the second pattern area by displaying the first color in the first pattern area and the second pattern area during a measurement period; and calculating a lifespan of the first light emitting elements based on the measured luminance of the first pattern area and the measured luminance of the second pattern area.

A display device includes a display panel including a pixel electrically connected to a feedback line, a sensor electrically connected to the feedback line, the sensor being configured to measure an impedance of the pixel in response to a first control signal, and to measure a driving current flowing through the pixel in response to a second control signal, and a timing controller configured to selectively generate the first control signal and the second control signal based on an aging time of the display panel.

A driving controller includes: a logo determiner configured to determine whether or not input image data includes a logo; a logo grayscale value calculator configured to calculate a logo grayscale value of a logo area corresponding to the logo in response to the input image data including the logo; a light emitting element life expectancy determiner configured to determine a life expectancy of a light emitting element corresponding to the logo area; a compensation reference grayscale value generator configured to determine a compensation reference grayscale value according to the life expectancy of the light emitting element corresponding to the logo area; and a logo luminance compensator configured to compare the logo grayscale value to the compensation reference grayscale value to determine whether or not to compensate a luminance of the logo area.

A display device includes a display part, a degradation compensator that generates a first compensated grayscale value by compensating for a first grayscale value corresponding to a first pixel, and generates a second compensated grayscale value by compensating for a second grayscale value corresponding to a second pixel, and a data driver that generates a first data signal based on the first compensated grayscale value to supply the first data signal to the first pixel, and generates a second data signal based on the second compensated grayscale value to supply the second data signal to the second pixel. A second degradation curve is defined by a first degradation coefficient corresponding to a first degradation curve, and a second degradation coefficient corresponding to a first estimated degradation curve for the light conversion particles of a second color calculated by applying the first degradation curve.