Abstract: A display apparatus includes a display panel, a memory, and a driver. The memory stores at least one set of correspondences, and each set of correspondences includes 2N grayscale data and 2N register values in a one-to-one correspondence with the 2N grayscale data; each register value represents a grayscale voltage value of corresponding grayscale data; and N is a positive integer greater than or equal to 6. The driver obtains the at least one set of correspondences from the memory; receives image data from a signal transmission interface, the image data including a plurality of grayscale data corresponding to a plurality of sub-pixels; for any grayscale data in the image data, obtains a register value corresponding to the grayscale data in a set of correspondences; and outputs a grayscale voltage corresponding to a grayscale voltage value represented by the register value to the display panel according to the register value.

Abstract: A display device includes a light emitting diode electrically connected between a driving voltage line and a common voltage line; a driving transistor electrically connected between the driving voltage line and the light emitting diode; a second transistor electrically connected between a first electrode of the driving transistor electrically connected to the driving voltage line and a data line; a first scan line electrically connected to a gate electrode of the second transistor; a third transistor electrically connected between a second electrode of the driving transistor electrically connected to the light emitting diode and a gate electrode of the driving transistor; and a connection electrode that connects the gate electrode of the driving transistor and the third transistor, wherein at least a part of a contact portion where the connection electrode contacts the third transistor does not overlap the first scan line.

Abstract: A scan driver and an organic light emitting display apparatus including the same, where a narrow bezel is realized, are provided. The scan driver includes a plurality of stages, wherein each of the plurality of stages includes a Q1 node controller controlling a voltage of a Q1 node by using first and second clock signals whose phases are opposite to each other, a QB node controller controlling a voltage of a QB node by using the first and second clock signals, an output clock signal, and a start signal, a first transistor outputting a gate low voltage as a scan signal while the QB node is activated, and a second transistor outputting a gate high voltage as the scan signal while a Q2 node is activated, and outputting the gate low voltage as the scan signal when the Q2 node is bootstrapped to a voltage lower than the gate low voltage.

Abstract: The present disclosure relates to an organic light emitting diode display device capable of changing a frame size. The organic light emitting diode display device includes: a display including a panel, a frame memory configured to store image data in units of frames, and a timing controller configured to control the panel to display an image based on the image data stored in the frame memory; a memory configured to store information of the panel; and a controller configured to, when operating in a preset image mode, change a frame size, which is a size of the image data stored in the frame memory, based on the information of the panel.

Abstract: A display panel, a display device and a method for driving a display panel are provided. The display panel includes N types of display areas which includes an i-th type display area and a j-th type display area. The display panel includes M display parts which include a first display part and a second display part. The first display part includes at least one i-th type display area, and the second display part includes at least one i-th type display area. At least one j-th type display area is arranged between the i-th type display area included in the first display part and the i-th type display area included in the second display part. Light-emitting time periods of the i-th type display area and the j-th type display area at least partially do not overlap, to reduce the number of sub-pixels driven at the same time period.

Abstract: An OLED display system is provided having visual performance pixel compensation for loss of brightness, including display pixels, where each display pixel has OLED subpixels and pixel drive circuitry; a sensing system having sensors and analog to digital conversion circuitry connected to each of the sensors, and a processor to provide an image data drive signal to each of the display pixels, receive the sensor signal from the ADC circuitry for each sensor, estimate a state of degradation of at least one of the display pixels, determine a drive-signal compensation for each display pixel having an estimated state of degradation and compensate the image data drive signal to each display pixel having an estimated state of degradation. Methods for compensating pixels for an image in a display are also provided.

Abstract: The present disclosure relates to a pixel sensing circuit which extends an operation section of an integrator by using an additional signal and allows securing a time required for a stable output of a sensing voltage.

Abstract: A method for control of a pixel array based on a temperature estimate is provided. A method includes sampling an anode voltage of each LED of a plurality of pixels resulting in sampled voltages, determining an average voltage based on the sample voltages, and determining a total voltage to provide to the pixels based on the average voltage and voltage data from a memory coupled to the controller, the voltage data including one or more of a 3-sigma value, a driver headroom value, a resistance value, or a k-factor value.

Abstract: Disclosed is a display device comprising a light emitting element, and a pixel driving circuit connected to the light emitting element and configured to include first to fourth nodes, wherein the pixel driving circuit includes a driving transistor connected to the first to third nodes, a plurality of switching transistors, a storage capacitor, and a plurality of signals and voltage lines, wherein an initialization voltage applied through an initialization line among the plurality of signals and voltage lines is varied based on a data voltage.

Abstract: The organic light emitting display device is driven to be divided into a refresh frame when the data voltage is programmed in the pixel and a reset frame when the anode electrode of the organic light emitting diode is reset, and the data voltage is maintained to a first level during the reset frame. Accordingly, a separate stage for applying an on bias stress is not provided so that the bezel may be reduced.

Abstract: Disclosed is a display device, which includes a display panel including a plurality of pixels, and one of the plurality of pixels includes a light emitting device connected to a first reference node and that emits light, a driving transistor connected between a power supply line receiving a power supply voltage and the first reference node, a scan transistor connected between a data line receiving a data signal and the driving transistor and that receives a scan signal, a first capacitor connected between the first reference node and a second reference node, a shared transistor connected between the first reference node and the second reference node and that receives a shared control signal, and the first capacitor and the shared transistor are connected in series between the first reference node and the second reference node, and a control electrode of the driving transistor is connected to the second reference node.

Abstract: A novel display panel that is highly convenient or reliable is provided. The display panel includes a pixel comprising a pixel circuit and a display element, and the display element is electrically connected to the pixel circuit. The pixel circuit is supplied with a selection signal, an image signal, and a pulse width control signal, supplies an output potential, and determines, on the basis of the pulse width control signal, a period during which the output potential is supplied. The pixel circuit includes a first switch and a first transistor. The first switch supplies the image signal on the basis of the selection signal and determines the output potential on the basis of the image signal. The first transistor includes a first and second electrode, and a first gate electrode. The output potential is output from the first electrode, and the first gate electrode is supplied with the image signal.

Abstract: A display device includes a light emitting diode electrically connected between a driving voltage line and a common voltage line; a driving transistor electrically connected between the driving voltage line and the light emitting diode; a second transistor electrically connected between a first electrode of the driving transistor electrically connected to the driving voltage line and a data line; a first scan line electrically connected to a gate electrode of the second transistor; a third transistor electrically connected between a second electrode of the driving transistor electrically connected to the light emitting diode and a gate electrode of the driving transistor; and a connection electrode that connects the gate electrode of the driving transistor and the third transistor, wherein at least a part of a contact portion where the connection electrode contacts the third transistor does not overlap the first scan line.

Abstract: An electronic device according to an embodiment may include a display, a touch sensor, an illuminance sensor configured to generate illuminance information, a memory configured to store brightness data relating the ambient illuminance to brightness of the display, and a processor. The processor may be configured to identify the illuminance information from the illuminance sensor, configure the brightness of the display as first brightness, based on the illuminance information and the brightness data, change the brightness of the display to second brightness, based on a user input, acquire event information for an operation in which the brightness of the display is changed by the user input, reconfigure the brightness data stored in the memory, based on the event information, and determine the brightness of the display according to a brightness value mapped in the reconfigured brightness data to the illuminance information identified by the illuminance sensor.

Abstract: A pixel circuit and a display device including the same are disclosed. The pixel circuit of this disclosure includes a driving element including a first electrode connected to a first node to which a pixel driving voltage is applied, a gate electrode connected to a second node, and a second electrode connected to a third node, and configured to supply an electric current to a light emitting element; a first switch element configured to be turned on according to a gate-on voltage of a scan pulse to supply a data voltage to the second node; and a second switch element configured to be turned off according to a gate-off voltage of a light emitting control pulse generated in antiphase of the scan pulse.

Abstract: A driving method includes row scanning circuit configured to output scanning signals to sub-pixels in the display panel for plurality of times within one frame and output the scanning signals to the sub-pixels in the display panel in plurality of sub-frames each time; a data processor is configured to receive a display data stream including the display data corresponding to the sub-pixels in the plurality of sub-frames, split the display data stream according to analog-bit display data and digital-bit display data, and output the split display data stream to a column scanning circuit; and the column scanning circuit is configured to generate corresponding data signals of bright-state analog data voltages according to the analog-bit display data and transmit corresponding data signals of dark-state digital data voltages or the corresponding data signals of bright-state analog data voltages to corresponding sub-pixels in the display panel according to the digital-bit display data.

Abstract: A display device includes a display panel including first to (m*n?1)th pixel rows and a dummy pixel row, where each of m and n is a natural number greater than or equal to 2, an emission driver which provides emission signals to the first to (m*n?1)th pixel rows and the dummy pixel row, and a timing controller which provides an emission start signal and a dummy start signal to the emission driver. Each of the emission signals includes a plurality of on-periods and a plurality of off-periods in one frame period, and time points of off-periods of an emission signal provided to the dummy pixel row are the same as time points of off-periods of an emission signal provided to each of k*nth pixel rows, where k is a natural number greater than or equal to 1 and less than m.

Abstract: A light emitting display device can include a display panel including M subpixels sharing a sensing line, wherein M is an integer equal to or greater than 2; and a circuit configured to sense one or more elements included in at least one of the M subpixels through the sensing line, in which the M sub-pixels are initialized based on an initialization voltage during an initial period, the M sub-pixels are sensed based on a sensing voltage during a data writing period, and an amount of time of the initial period is longer than an amount of time of the data writing period.

Abstract: A method of driving a display device, includes: supplying a first sensing data signal corresponding to a first grayscale, first power having a first sensing voltage, and a reference voltage to a pixel during a first sensing period; sensing a first sensing current, generated based on the first sensing voltage, from the pixel during the first sensing period; supplying a second sensing data signal corresponding to a second grayscale and different from the first sensing data signal, the first power having a second sensing voltage, and the reference voltage to the pixel during a second sensing period; sensing a second sensing current, generated based on the second sensing voltage different from the first sensing voltage, from the pixel during the second sensing period; and calculating characteristics of a driving transistor of the pixel using the first sensing current and the second sensing current.

Abstract: The present disclosure provides a display substrate, a method for manufacturing the same, a driving method and a display device. The display substrate includes a base substrate, gate lines, data lines and sub-pixels. The sub-pixels include sub-pixel columns corresponding to the data lines in a one-to-one manner. In a sub-pixel driving circuit of the sub-pixel, a driving transistor and a data writing transistor are located at a first side of an aperture area of the sub-pixel; a sensing transistor is located at a second side of the aperture area of the sub-pixel. The first side and the second side are opposite sides of the aperture area along the extension direction of the data lines. Gate electrodes of sensing transistors in a same sub-pixel row, and gate electrodes of data writing transistors in an adjacent next sub-pixel row, are all coupled to a gate line corresponding to the adjacent next sub-pixel row.

Abstract: The present application provides a display device. The display device includes a pixel circuit and multiple operational amplifiers. Pixel units in the same column are electrically connected to the same operational amplifier. The display device of the present application uses the operational amplifier to stabilize a voltage and amplify a current, which solves non-uniformity of the display panel caused by the difference in a threshold voltage and channel electron mobility of the thin film transistor due to an immature manufacturing process of a thin film transistor, so uniformity of the panel is improved.

Abstract: A micro-LED driver applies a low baseline power (i.e., a baseline voltage or current) to pre-charge a micro-LED in a nominally-off (i.e., non-light-emitting) state in addition to applying an operating driving power to drive the micro-LED in a light-emitting state. By pre-charging the micro-LED prior to applying the operating driving power, the micro-LED driver significantly decreases the time between application of the operating driving power and onset of emission of light from the micro-LED. In some embodiments, the micro-LED driver applies an operating driving power having multiple phases of current density to reduce the time between application of the operating driving power and onset of emission of light from the micro-LED.

Abstract: A driving method, for a controller in a display apparatus, is disclosed. The display apparatus includes LED strings, scan transistors, current regulators and a power converter. The driving method includes following steps. LED cathode voltages are detected on nodes between the LED strings and the current regulators. When a first LED cathode voltage is equal to a minimal operable voltage of the current regulators and a second LED cathode voltage exceeds the minimal operable voltage of the current regulators, a driving current flowing through the second data channel is adjusted by increasing a pulse current level of the driving current and reducing a duty cycle ratio of the driving current flowing through the second data channel.

Abstract: A method for driving a pixel circuit. The pixel circuit includes a drive transistor. The method includes: acquiring a theoretical threshold voltage of the drive transistor and actual threshold voltages of the drive transistor at a plurality of different gray levels; determining compensation data voltages of the drive transistor at the plurality of different gray levels according to the theoretical threshold voltage of the drive transistor and the actual threshold voltages of the drive transistor at the plurality of different gray levels; and driving the pixel circuit emit light according to the compensation data voltages of the drive transistor at the plurality of different gray levels.

Abstract: A light emitting display panel and a light emitting display apparatus using the same are provided, in which a sensing line is provided in parallel with a gate line. The light emitting display panel comprises a data line provided along a first direction, a black line provided along the first direction, a first voltage supply line provided along the first direction, a gate line provided along a second direction different from the first direction, a sensing line provided along the second direction, a sensing control line provided along the second direction, a black control line provided along the second direction, a pixel driving circuit coupled with the data line, the black line, the first voltage supply line, the gate line, the sensing line, the sensing control line and the black control line, and a light emitting element coupled to the pixel driving circuit.

Abstract: 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.

Abstract: The present disclosure relates to display device, display panel, and display driving method.

Abstract: A method of driving a display device, includes: supplying a first sensing data signal corresponding to a first grayscale, first power having a first sensing voltage, and a reference voltage to a pixel during a first sensing period; sensing a first sensing current, generated based on the first sensing voltage, from the pixel during the first sensing period; supplying a second sensing data signal corresponding to a second grayscale and different from the first sensing data signal, the first power having a second sensing voltage, and the reference voltage to the pixel during a second sensing period; sensing a second sensing current, generated based on the second sensing voltage different from the first sensing voltage, from the pixel during the second sensing period; and calculating characteristics of a driving transistor of the pixel using the first sensing current and the second sensing current.

Abstract: A display device includes: a pixel unit including a plurality of pixels; a data driver configured to supply a data voltage to the pixels through data lines based on a source output enable signal; and a reference voltage controller configured to supply a reference voltage to the pixels through reference voltage lines, wherein each of the pixels includes a light emitting element between a first power source line and a second power source line, and wherein the reference voltage controller is configured to compensate for the reference voltage based on the source output enable signal, and to supply a compensated reference voltage to an anode electrode of the light emitting element.

Abstract: The present invention provides an image processing device that reproduces the color of an input image more faithfully under different environment illumination without the need to prepare a different signal separation LUT for different environment illumination. An image processing device in one embodiment of the present invention generates data for generating an overlap image by overlapping an image formed by an image forming device and an image projected by an image projection device. The image processing device includes a generation unit configured to, based on input image data, generate first image data for the image forming device and second image data for the image projection device, a first acquisition unit configured to acquire environment illumination information relating to environment illumination in generating the overlap image, and a correction unit configured to correct the second image data based on the environment illumination information.

Abstract: The display device includes a substrate including a sensor area, a display panel including a first pixel disposed in the sensor area, and a sensor disposed between the substrate and the display panel and overlapping the sensor area. The sensor area includes pixel areas in which the first pixel is disposed and transmission areas in which the first pixel is not disposed, the transmission areas include a first transmission area, the pixel areas include a first pixel area positioned in a first direction of the first transmission area and a second pixel area positioned in a second direction crossing the first direction of the first transmission area, the first pixel includes a first pixel circuit, some of transistors of the first pixel circuit are disposed in the first pixel area, and others of the transistors of the first pixel circuit are disposed in the second pixel area.

Abstract: A display device includes: a display panel including a plurality of pixels connected to a plurality of scan lines and a plurality of data lines, respectively; a scan driver, which provides a scan signal to the pixels through the scan lines; a data driver, which provides a data voltage to the pixels through the data lines; and a controller, which controls the scan driver and the data driver, and receives input image data at a variable input frame frequency. The controller determines whether a gray scale value of the input image data is included in any range of a first gray scale range and a second gray scale range different from the first gray scale range, and dithers the input image data when it is determined that the gray scale value of the input image data is included the first gray scale range.

Abstract: An electroluminescent display apparatus including a pixel connected to a detection line; a panel driving circuit configured to off-drive a driving element included in the pixel in a detection interval; a reference voltage generating circuit configured to supply a detection reference voltage to the detection line prior to the detection interval, generate a first comparator reference voltage which is higher than the detection reference voltage in the detection interval, and generate a second comparator reference voltage which is lower than the detection reference voltage in the detection interval; a comparator configured to compare the first comparator reference voltage with a voltage of the detection line to generate a first comparison output at a first timing of the detection interval and comparing the second comparator reference voltage with the voltage of the detection line to generate a second comparison output at a second timing of the detection interval; and a logic circuit configured to determine an occ

Abstract: A method is provided for adjusting a viewing angle for a dark state of a display panel, and the method includes steps of: obtaining a first brightness change of a to-be-tested panel at a first viewing angle under a condition of a first voltage difference; obtaining a second brightness change of the to-be-tested panel at a second viewing angle under the condition of the first voltage difference; obtaining a ratio of the second brightness change to the first brightness change; and comparing the ratio of the second brightness change to the first brightness change with a first threshold to determine whether the first voltage difference is a selection voltage of the display panel.

Abstract: A semiconductor structure comprises a substrate, a patch of optically tunable material disposed over the substrate, a first electrode coupled to the patch of optically tunable material and a switch providing a current source, and a second electrode coupled to the patch of optically tunable material and a ground voltage. The first electrode and the second electrode are configured to modify a state of the patch of optically tunable material to adjust a reflectivity of the patch of optically tunable material.

Abstract: A display panel including: a base substrate which includes a display region and a non-display region on at least one side of the display region, the display region includes a first display region and a second display region having a resolution higher than that of the first display region, and the non-display region includes a pixel circuit region; a plurality of first light-emitting elements in the first display region; and a plurality of first pixel circuits in the pixel circuit region, where orthographic projections of the plurality of first pixel circuits and orthographic projections of the plurality of first light-emitting elements on the base substrate are not overlapped with one another.

Abstract: A display module including a display panel comprising a plurality of pixels each comprising a plurality of sub pixels, the pixels being disposed on a plurality of row lines of the display panel and a driver. The driver being configured to apply a pulse width modulation (PWM) data voltage to the sub pixels in a sequential order of the row lines; and drive the display panel such that the sub pixels included in a plurality of consecutive row lines among the plurality of row lines emit light, in the sequential order of the row lines, for a time corresponding to the applied PWM data voltage.

Abstract: A display device includes a plurality of pixels connected to a plurality of first scan lines, a plurality of second scan lines, and a plurality of data lines, where the pixels are arranged in a plurality of rows, a plurality of first stages connected to the first scan lines, a plurality of second stages connected to the second scan lines, and a data driver connected to the data lines. Each of the first scan lines is connected to pixels arranged in a corresponding row among the rows. Each of the second scan lines is commonly connected to pixels arranged in corresponding 8h rows among the plurality of rows, where h is a natural number.

Abstract: A pixel includes a light emitting element, a first transistor connected between first and second nodes and that generates a driving current flowing from a first power line to a second power line through the light emitting element, a second transistor connected between a data line and the first node and turned on in response to a fourth scan signal, a third transistor connected between the second node and a third node corresponding to a gate electrode of the first transistor and turned on in response to a second scan signal, a fourth transistor connected between the third node and a third power line providing a third power voltage and turned on in response to a first scan signal, and a fifth transistor connected between the first and fourth nodes and turned on in response to a fifth scan signal.

Abstract: A method for inspecting a display device (which includes a pixel electrode and a touch sensor overlapping the pixel electrode) includes: adjusting an impedance value of a variable impedance circuit of an inspection apparatus according to a model of the display device; driving a power source generator of the inspection apparatus; supplying a pixel voltage to the pixel electrode through an output terminal connected to the variable impedance circuit; driving the touch sensor; and detecting a defect related to the pixel electrode based on sensing signals output from the touch sensor.

Abstract: Provided are an organic light-emitting display panel, a driving method and a driving device therefor. The driving method includes: setting brightness levels of the organic light-emitting display panel and maximum gray scale brightness levels, and maximum gray scale brightness levels include a first maximum gray scale brightness corresponding to a maximum brightness level of the organic light-emitting display panel, and an effective pulse duty cycle of a light-emitting control signal for driving the first maximum gray scale brightness is defined as a first effective pulse duty cycle; determining a target brightness level of the switched picture and a target maximum gray scale brightness corresponding to the target brightness level; adjusting the target effective pulse duty cycle of the light-emitting control signal for driving the switched picture.

Abstract: A display device includes a display panel including pixels, and a driver to drive the display panel based on input image data. The driver performs a sensing operation for the pixels, to selectively perform the sensing operation by comparing grayscale values of the input image data and a reference grayscale value, to selectively perform a luminance control operation for controlling luminance of the display panel in response to a luminance control signal, and to adjust the reference grayscale value when the luminance control operation is performed.

Abstract: A light emitting element includes a first electrode, a second electrode, and a light emission layer interposed between the first electrode and the second electrode, where an emission efficiency of the light emission layer varies based on a voltage applied to at least one selected from the first electrode and the second electrode.

Abstract: A display device includes a first pixel driver connected to a sweep line, the first pixel driver generating a control current based on a first data voltage, a second pixel driver connected to a scan control line, the second pixel driver generating a driving current based on a second data voltage and controlling a period for which the driving current flows, based on the control current, and a light-emitting element connected to the second pixel driver to receive the driving current. The first pixel driver includes a first transistor generating the control current based on the first data voltage, a second transistor providing the first data voltage to a first electrode of the first transistor based on a scan write signal, and a first capacitor including a first capacitor electrode connected to a gate electrode of the first transistor, and a second capacitor electrode connected to the sweep line.

Abstract: The present disclosure provides a display device. The display device includes at least one display panel including at least one light-emitting diode (LED) light board, a drive control module connected to the LED light board, and a detecting module respectively connected to the LED light board and the drive control module. The LED light board includes at least one LED. The drive control module is configured to drive the LED of the LED light board to display.

Abstract: A display device includes: a first pixel driver to generate a control current; a second pixel driver to generate a driving current, and control a period during which the driving current flows, based on the control current; and a light-emitting element connected to the second pixel driver to receive the driving current. The first pixel driver includes: a first transistor to generate the control current based on a first data voltage; and a second transistor to provide the first data voltage to a first electrode of the first transistor based on a scan write signal from a scan write line. The second pixel driver includes: a third transistor to generate the driving current based on the control current; and a fourth transistor to provide a second data voltage to a first electrode of the third transistor based on a scan write signal from the scan write line.

Abstract: An electronic device comprises a display and a controller. The controller is configured to provide a first frequency refresh rate to the display. The controller is also configured to generate a control signal configured to control emission of a light emitting diode of a display pixel of the display at a second frequency based on whether the first frequency refresh rate of the display is less than a predetermined threshold value.

Abstract: An organic light emitting display device includes pixels, a sensor configured to extract at least one of deviation information of first transistors of the pixels and deterioration information of OLEDs of the pixels in a sensing period, and a converter configured to change a bit of first data input from the outside by using at least one of the deviation information and the deterioration information, and to generate second data, wherein a pixel at an ith horizontal line includes an OLED, a first transistor configured to control an amount of a current that flows from a first power source via the OLED in response to a voltage of a first node, second and third transistors configured to turn on when a scan signal is supplied to an ith scan line, and a fourth transistor configured to turn on when a control signal is supplied to an ith control line.

Abstract: A pixel circuit, a drive method, a display substrate, and a display device are provided. The pixel circuit includes a light emitting device, a current supply sub-circuit, and a time control sub-circuit. The current supply sub-circuit is connected to a scanning signal terminal, a data signal terminal, a light emitting control terminal, a first power voltage terminal, the time control sub-circuit, and the light emitting device, and is configured to receive a data voltage of the data signal terminal and provide a drive current for the light emitting device. The time control sub-circuit is connected to the scanning signal terminal, a time length signal terminal, a second power voltage terminal, a direct current control signal terminal, and a direct current voltage terminal, and is configured to receive a time length voltage of the time length signal terminal and a direct current voltage input by the direct current voltage terminal.

Abstract: A display device includes a display panel including a pixel including a light emitting element emitting light and electrically connected to a data line and a sensing line, a timing controller varying a driving frequency of the display panel based on an input frequency of digital video data, and a data driver supplying a data voltage to the data line based on the digital video data during a data addressing period of a frame period and receiving a sensing signal from the sensing line during a sensing period. The data driver electrically connects the sensing line to an initialization voltage line during the data addressing period in case that the digital video data is changed, and electrically connects the sensing line to a high impedance during the data addressing period in case that the digital video data is not changed.