Display device and driving method thereof

Abstract

A display apparatus includes a display panel including a plurality of pixels, the display panel configured to be driven in a first driving period, a blanking period after the first driving period, and a second driving period after the blanking period; a data driver configured to provide a data voltage to at least one pixel during the first driving period and the second driving period to display an image based on compensated image data, and to detect a voltage from a reference voltage line connected with the at least one pixel to convert the voltage into sensing data; and a timing controller configured to determine first compensation data based on a difference between the sensing data detected during the first driving period and the sensing data detected during the second driving period, and to determine the compensated image data based on input image data and the first compensation data.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority to Korean Patent Application No. 10-2021-0186013, filed with the Korean Intellectual Property Office on December 23, 2021, the disclosure of which is incorporated herein by reference. Technical Field

[0003] This disclosure relates to a display device and a driving method thereof, and more specifically, to a display device and a driving method thereof capable of compensating for data. Background Technology

[0004] Among the devices used as displays for computers, televisions, mobile phones or other electronic devices, there are self-emissive organic light-emitting display devices (OLEDs) and liquid crystal display devices (LCDs) that require a separate light source.

[0005] Among various display devices, OLED devices include a display panel with multiple sub-pixels and a driver for driving the display panel. The driver includes a gate driver that provides gate signals and a data driver that provides data voltages to the display panel. When signals such as gate signals and data voltages are provided to the sub-pixels of the OLED device, selected sub-pixels emit light to display an image.

[0006] In recent years, real-time compensation technology has been applied to the blanking period to improve image quality. During the blanking period, the OLED element temporarily stops emitting light to perform sensing, so that a recovery voltage can be applied after the blanking period to make the OLED element emit light again.

[0007] In this situation, a potential deviation in the emission voltage of the OLED element occurs before and after the blanking period, resulting in a brightness difference. Therefore, there is a problem of identifying bright or dark lines in the image, thus degrading image quality. Summary of the Invention

[0008] Therefore, embodiments of this disclosure relate to a display device and its driving method that substantially eliminate one or more problems caused by the limitations and deficiencies of related technologies.

[0009] One object of this disclosure is to provide a display device capable of providing uniform image quality before and after real-time compensation.

[0010] Another object of this disclosure is to provide a display device that simultaneously compensates for both the characteristic values ​​of the driving transistors and the data voltage offset.

[0011] The features and aspects of this disclosure are not limited to those mentioned above. Other features and aspects will be set forth in the following description, and other parts of these features and aspects will be readily understood or learned by those skilled in the art from the following description or by practicing the inventive concepts provided herein.

[0012] To achieve these and other advantages and in accordance with the purposes of this disclosure, as specifically and generally described herein, a display device may include: a display panel comprising a plurality of pixels, the display panel being driven during a first driving period, a blanking period following the first driving period, and a second driving period following the blanking period; a data driver configured to provide a data voltage to at least one pixel during the first driving period and the second driving period to display an image based on a compensated image data, and to detect a voltage from a reference voltage line connected to the at least one pixel to convert the voltage into sensing data; and a timing controller configured to determine first compensation data based on a difference between the sensing data detected during the first driving period and the sensing data detected during the second driving period, and to determine the compensated image data based on input image data and the first compensation data.

[0013] According to another aspect of this disclosure, a method for driving a display device includes: a display panel comprising a plurality of pixels and a data driver configured to provide a data voltage to at least one pixel, the display panel being driven during a first driving period and a second driving period of displaying an image and during a blanking period between the first driving period and the second driving period, the method comprising: detecting a first voltage on a reference voltage line connected to at least one pixel during the first driving period and determining first sensing data based on the first voltage; detecting a second voltage on the reference voltage line connected to at least one pixel during the blanking period and determining second sensing data based on the second voltage; detecting a third voltage on the reference voltage line connected to at least one pixel during the second driving period and determining third sensing data based on the third voltage; determining compensated image data based on at least one of the first, second, and third sensing data; and applying the data voltage to at least one pixel based on the compensated image data.

[0014] According to an exemplary embodiment of this disclosure, the displayed image before and after the blanking period of the sensing can be the same.

[0015] According to exemplary embodiments of this disclosure, image quality degradation due to sensing can be suppressed.

[0016] It should be understood that the foregoing general description and the following detailed description are provided only to further illustrate the claimed inventive concept. Attached Figure Description

[0017] The accompanying drawings, included to provide a further understanding of this disclosure and which are incorporated in and constitute a part of this application, illustrate embodiments of the disclosure and, together with the description, serve to describe the principles of the disclosure. In the drawings:

[0018] Figure 1 This is a schematic diagram of a display device according to an exemplary embodiment of the present disclosure;

[0019] Figure 2 This is a circuit diagram of the pixels of a display device according to an exemplary embodiment of the present disclosure;

[0020] Figure 3 This is a block diagram illustrating a timing controller and a data driver for compensation of a display device according to an exemplary embodiment of the present disclosure;

[0021] Figure 4 It is a diagram used to illustrate the operation of each frame of the display device according to an exemplary embodiment of the present disclosure;

[0022] Figure 5 This is a timing diagram of signals used for normal driving during a first driving period of a display device according to an exemplary embodiment of the present disclosure;

[0023] Figure 6 This is a timing diagram of the signal used to sense mobility during the blanking period of a display device according to an exemplary embodiment of the present disclosure;

[0024] Figure 7 This is a timing diagram of signals used for normal driving during the second driving period of a display device according to an exemplary embodiment of the present disclosure;

[0025] Figure 8 This is a block diagram of a timing controller for a display device according to an exemplary embodiment of the present disclosure; and

[0026] Figure 9 This is a flowchart for explaining a driving method for a display device according to an exemplary embodiment of the present disclosure. Detailed Implementation

[0027] The advantages and features of this disclosure, as well as the methods for achieving these advantages and features, will become clear from reference to the exemplary embodiments described in detail below with reference to the accompanying drawings. However, this disclosure is not limited to the exemplary embodiments disclosed herein, but will be implemented in various forms. These exemplary embodiments are provided by way of example only so that those skilled in the art can fully understand the disclosure and scope of this disclosure. Therefore, this disclosure will be limited only by the scope of the appended claims.

[0028] The shapes, dimensions, scales, angles, quantities, etc., shown in the accompanying drawings to describe exemplary embodiments of this disclosure are merely examples, and therefore this disclosure is not limited to the examples in the drawings. Throughout the specification, the same reference numerals generally denote the same elements unless otherwise indicated.

[0029] In the following description of this disclosure, detailed descriptions of relevant known functions or structures may unnecessarily obscure the essential points of this disclosure, and detailed descriptions of such functions or structures may be omitted.

[0030] Additional components may be added when using terms such as “including,” “having,” and “consisting of,” unless these terms are used with the word “only.” Unless otherwise explicitly stated, a component described in the singular form means that multiple components are included.

[0031] Unless explicitly stated otherwise, components are interpreted as including both errors and tolerances when they are explained.

[0032] When using terms such as “on,” “above,” “below,” “under,” “below,” “on one side,” and “adjacent” to describe the positional relationship between two parts, one or more parts may be placed between the two parts, unless these terms are used with the terms “immediately adjacent” or “directly.” For example, when one element or layer is placed “on” another element or layer, the element or layer may be placed directly on the other element or layer, and a third element or layer may be inserted between them.

[0033] When a component or layer is described as being "on" or "connected" to another component or layer, it should be understood that the component or layer may be directly on or connected to the other component or layer, or that an intervening component or layer may be present. Furthermore, when a component is described as being "above" or "below" another component, it should be understood that these components are either configured to be in direct contact with each other or configured not to be in direct contact with each other.

[0034] Although the terms “first,” “second,” A, B, (a), (b), etc., are used to describe various components, these components are not limited by these terms, as they are not used to define a specific order or sequence. These terms are merely used to distinguish one component from other components. For example, the first component can be the second component, and similarly, the second component can refer to the first component, as long as it does not depart from the technical concept of this disclosure.

[0035] For ease of illustration, the dimensions and thickness of each component shown in the accompanying drawings are illustrated, but this disclosure is not limited to the dimensions and thickness of the illustrated components.

[0036] The features of the various embodiments of this disclosure may be combined or integrated with each other in part or in whole, and may be technically interlocked and operated in various ways. These embodiments may be implemented independently of each other or in association with each other.

[0037] The transistors used in the display device of this disclosure can be implemented using one or more of n-channel transistors (NMOS) and p-channel transistors (PMOS). The transistors can be implemented using oxide semiconductor transistors with oxide semiconductor as the active layer or LTPS transistors with low-temperature polycrystalline silicon (LTPS) as the active layer. The transistors can include at least a gate, a source, and a drain. The transistors can be implemented using thin-film transistors (TFTs) on a display panel. In the transistor, charge carriers flow from the source to the drain. In the case of an n-channel transistor (NMOS), since the charge carriers are electrons, the source voltage is lower than the drain voltage to allow electrons to flow from the source to the drain. The current in the n-channel transistor (NMOS) flows from the drain to the source, and the source can be used as an output terminal. In the case of a p-channel transistor (PMOS), since the charge carriers are holes, the source voltage is higher than the drain voltage to allow holes to flow from the source to the drain. In a p-channel transistor (PMOS), holes flow from the source to the drain, causing current to flow from the source to the drain, and the drain can be used as an output terminal. Therefore, the source and drain can be switched according to the applied voltage; it should be noted that the source and drain of a transistor are not fixed. In this specification, it is assumed that the transistor is an n-channel transistor (NMOS), but it is not limited to this; a p-channel transistor can be used, which would change the circuit configuration.

[0038] The gate signal of a transistor used as a switching element oscillates between a turn-on voltage and a turn-off voltage. The turn-on voltage is set above the transistor's threshold voltage Vth, and the turn-off voltage is set below the transistor's threshold voltage Vth. The transistor turns on in response to the turn-on voltage and turns off in response to the turn-off voltage. In the case of NMOS, the turn-on voltage can be high, and the turn-off voltage can be low. In the case of PMOS, the turn-on voltage can be low, and the turn-off voltage can be high.

[0039] Various exemplary embodiments of this disclosure will be described in detail below with reference to the accompanying drawings.

[0040] Figure 1 This is a schematic diagram of a display device according to an exemplary embodiment of the present disclosure.

[0041] like Figure 1 As shown, the display device 100 includes a display panel 110, a gate driver 120, a data driver 130, and a timing controller 140.

[0042] Display panel 110 is a panel for displaying images. Display panel 110 may include various circuits, wiring, and light-emitting diodes disposed on a substrate. Display panel 110 is divided by multiple data lines DL and multiple gate lines GL that intersect each other, and may include multiple pixels PX connected to the multiple data lines DL and multiple gate lines GL. Display panel 110 may include a display area defined by the multiple pixels PX and a non-display area in which various signal lines or pads are formed. Display panel 110 can be implemented by a display panel 110 used in various display devices such as LCD devices, OLED devices, or electrophoretic display devices. Hereinafter, display panel 110 will be described as a panel used in an OLED device, but is not limited thereto.

[0043] The timing controller 140 can receive timing signals such as vertical synchronization signals, horizontal synchronization signals, data enable signals, or point clocks via a receiver circuit connected to the host system, such as an LVDS or TMDS interface. The timing controller 140 can generate data control signals for controlling the data driver 130 and gate control signals for controlling the gate driver 120 based on the input timing signals.

[0044] The timing controller 140 can process externally input image data RGB that is suitable for the size and resolution of the display panel 110, to convert the image data RGB into converted image data RGB and provide the converted image data RGB to the data driver 130.

[0045] The timing controller 140 can sense the characteristic values ​​(mobility and threshold voltage) of the driving transistors disposed in a plurality of pixels PX to generate compensation data for the characteristic values ​​(mobility and threshold voltage) of the driving transistors. The timing controller 140 can use this compensation data to compensate for the RGB image data.

[0046] Data driver 130 can provide a data voltage Vdata to multiple sub-pixels. Data driver 130 may include a source printed circuit board and multiple source driver integrated circuits. Each of the multiple source driver integrated circuits can be provided with image data RGB and data control signals from timing controller 140 via the source printed circuit board.

[0047] The data driver 130 can convert image data RGB into gamma voltage in response to a data control signal to generate a data voltage Vdata, and the data voltage Vdata can be provided through the data line DL of the display panel 110.

[0048] The data driver 130 can receive voltages from multiple pixels PX to convert the voltages into sense data for characteristic values ​​(mobility or threshold voltage) of the driving transistors. The sense data can be output to the timing controller 140.

[0049] Multiple source driver integrated circuits can be connected to the data lines DL of the display panel 100 in the form of chip-on-film (COF). More specifically, each of the multiple source driver integrated circuits can be implemented as a chip disposed on a connecting film, and wiring connecting to the chip-shaped source driver integrated circuits can be formed on the connecting film. However, the arrangement of the multiple source driver integrated circuits is not limited to this; they can also be connected to the data lines DL of the display panel 110 via chip-on-glass (COG) or tape-on-board (TAB) processes.

[0050] Gate driver 120 can provide gate signals to multiple sub-pixels. Gate driver 120 may include a level shifter and a shift register. The level shifter shifts the level of a clock signal input from timing controller 140 at transistor-transistor-logic (TTL) level, and then provides the clock signal to the shift register. The shift register may be formed in a non-display area of ​​display panel 110 in a GIP manner, but is not limited thereto. The shift register may include multiple stages that shift gate signals to output in response to clock and drive signals. The multiple stages included in the shift register can sequentially output gate signals through multiple output terminals.

[0051] The display panel 110 may include multiple subpixels. These subpixels may be subpixels that emit different colors of light. For example, the multiple subpixels may be red subpixels, green subpixels, blue subpixels, and white subpixels, but are not limited to these. The multiple subpixels may constitute a pixel PX. That is, red subpixels, green subpixels, blue subpixels, and white subpixels can constitute one pixel PX, and the display panel 110 may include multiple pixel PXs.

[0052] In the following text, reference will be made to Figure 2 A more detailed description of the driving circuitry used to drive a pixel.

[0053] Figure 2 This is a circuit diagram of the pixels of a display device according to an exemplary embodiment of the present disclosure.

[0054] Figure 2 A circuit diagram of one pixel among a plurality of pixels in a display device 100 is shown.

[0055] like Figure 2 As shown, a pixel may include a switching transistor SWT, a sensing transistor SET, a driving transistor DT, a storage capacitor SC, and a light-emitting diode 150.

[0056] The light-emitting diode 150 may include an anode, an organic layer, and a cathode. The organic layer may include various organic layers, such as a hole injection layer, a hole transport layer, an organic light-emitting layer, an electron transport layer, and an electron injection layer. The anode of the light-emitting diode 150 may be connected to the output of the driving transistor DT, and a low-potential voltage VSS may be applied to the cathode via a low-potential voltage line VSSL. Figure 2 In this context, the light-emitting diode 150 is described as OLED 150, but is not limited thereto; inorganic light-emitting diodes, i.e. LEDs, may also be used as light-emitting diode 150.

[0057] The aforementioned low-potential voltage line VSSL is a positive voltage line configured to apply a low-potential voltage as a positive voltage, and can be represented as a ground terminal.

[0058] like Figure 2 As shown, the switching transistor SWT is a transistor that transmits the data voltage Vdata to a first node N1 connected to the gate of the driving transistor DT. The switching transistor SWT may include a drain connected to the data line DL, a gate connected to the gate line GL, and a source connected to the gate of the driving transistor DT. The switching transistor SWT is turned on by a scan signal SCAN applied from the gate line GL to transmit the data voltage Vdata provided from the data line DL to the first node N1 connected to the gate of the driving transistor DT.

[0059] like Figure 2 As shown, the driving transistor DT is a transistor that provides driving current to the light-emitting diode 150 to drive the light-emitting diode 150. The driving transistor DT may include a gate connected to the first node N1, a source connected to the second node N2 as an output terminal, and a drain connected to the third node N3 as an input terminal. The gate of the driving transistor DT is connected to the switching transistor SWT, the drain is given a high-potential voltage VDD through the high-potential voltage line VDDL, and the source may be connected to the anode of the light-emitting diode 150.

[0060] like Figure 2 As shown, the storage capacitor SC can be a capacitor that maintains a voltage corresponding to the data voltage Vdata for one frame. One electrode of the storage capacitor SC is connected to the first node N1, while the other electrode can be connected to the second node N2.

[0061] Meanwhile, in the case of the exemplary display device 100, as the driving time of each pixel increases, circuit elements such as the driving transistor DT may degrade. Therefore, the unique characteristic values ​​of circuit elements such as the driving transistor DT will change. Here, the unique characteristic values ​​of the circuit elements may include the threshold voltage Vth of the driving transistor DT or the mobility α of the driving transistor DT. Changes in the characteristic values ​​of the circuit elements will cause changes in the brightness of the corresponding pixels. Therefore, changes in the characteristic values ​​of the circuit elements can be used as the same concept as changes in the brightness of pixels.

[0062] Furthermore, the degree of variation in the eigenvalues ​​between the circuit elements of each pixel can vary depending on the degree of degradation of each circuit element. This difference in the degree of variation in the eigenvalues ​​between circuit elements can lead to brightness deviations between pixels. Therefore, the eigenvalue deviation between circuit elements can be used as the same concept as the brightness deviation between pixels. Variations in the eigenvalues ​​of circuit elements, i.e., pixel brightness variations, and eigenvalue deviations between circuit elements, i.e., brightness deviations between pixels, can lead to problems such as reduced brightness performance accuracy of pixels or screen anomalies.

[0063] Therefore, the pixels of the display device 100 according to the exemplary embodiments of the present disclosure can provide a sensing function for the feature values ​​of the sensing pixels and a compensation function for the feature values ​​of the pixels using the sensing results.

[0064] Therefore, as Figure 2 As shown, in addition to the switching transistor SWT, driving transistor DT, storage capacitor SC, and light-emitting diode 150, the pixel may also include a sensing transistor SET to effectively control the voltage state of the source of the driving transistor DT.

[0065] like Figure 2 As shown, the sensing transistor SET can be connected between the source of the driving transistor DT and the reference voltage line RVL that provides the reference voltage Vref, and its gate can be connected to the gate line GL. Therefore, the sensing transistor SET is turned on by the sensing signal SENSE applied through the gate line GL to apply the reference voltage Vref provided through the reference voltage line RVL to the source of the driving transistor DT. Furthermore, the sensing transistor SET can be used as one of the voltage sensing paths for the source of the driving transistor DT.

[0066] like Figure 2As shown, the switching transistor SWT and the sensing transistor SET of a pixel can share a single gate line GL. That is, the switching transistor SWT and the sensing transistor SET are connected to the same gate line GL to receive the same gate signal. For ease of explanation, the voltage applied to the gate of the switching transistor SWT is called the scan signal SCAN, and the voltage applied to the gate of the sensing transistor SET is called the sensing signal SENSE. However, the scan signal SCAN and the sensing signal SENSE applied to a pixel are the same signals transmitted from the same gate line GL.

[0067] However, this disclosure is not limited to this, and it is possible that only the switching transistor SWT is connected to the gate line GL, while the sensing transistor SET can be connected to a separate sensing line. Therefore, the scan signal SCAN can be applied to the switching transistor SWT through the gate line GL, while the sensing signal SENSE can be applied to the sensing transistor SET through the sensing line.

[0068] Therefore, the reference voltage Vref can be applied to the source of the driving transistor DT through the sensing transistor SET. Furthermore, the threshold voltage Vth of the driving transistor DT or the voltage used to sense the mobility α of the driving transistor DT is detected via the reference voltage line RVL. Additionally, the data driver 130 can compensate for the data voltage Vdata based on changes in the threshold voltage Vth or the mobility α of the driving transistor DT.

[0069] Figure 3 This is a block diagram illustrating a timing controller and data driver for compensation of a display device according to an exemplary embodiment of the present disclosure.

[0070] As described above, in the display device 100 according to an exemplary embodiment of the present disclosure, the characteristic value or change of the characteristic value of the driving transistor DT in the pixel PX can be determined based on the voltage of the reference voltage line RVL during the sensing period. Therefore, the reference voltage line RVL can not only be used to transmit the reference voltage Vref, but also serve as a sensing line for sensing the characteristic value of the driving transistor DT in the pixel PX. Therefore, the reference voltage line RVL can also be referred to as a sensing line.

[0071] Specifically, refer to Figure 2 and Figure 3 During the sensing period of the display device 100 according to an exemplary embodiment of the present disclosure, the characteristic value or change of the characteristic value of the driving transistor DT can be reflected as the voltage of the second node N2 of the driving transistor DT (e.g., Vdata-Vth).

[0072] When the sensing transistor SET is turned on, the voltage at the second node N2 of the driving transistor DT can correspond to the voltage of the reference voltage line RVL. Furthermore, the line capacitance Cline on the reference voltage line RVL can be charged by the voltage at the second node N2 of the driving transistor DT, and the reference voltage line RVL can have a voltage corresponding to the voltage at the second node N2 of the driving transistor DT due to the charged line capacitance Cline.

[0073] In a display device 100 according to an exemplary embodiment of the present disclosure, the switching transistor SWT and the sensing transistor SET to be sensed in the pixel PX are controlled to be turned on / off, and the supply of data voltage Vdata and reference voltage Vref is controlled. Therefore, the second node N2 of the driving transistor DT can be driven into a voltage state to reflect a characteristic value (threshold voltage or mobility) of the driving transistor DT or a change in that characteristic value.

[0074] The data driver 130 of the display device 100 according to an exemplary embodiment of the present disclosure may include an analog-to-digital converter (ADC) 131 and switching circuits SAM and SPRE. The ADC 131 measures the voltage of a reference voltage line RVL corresponding to the voltage of the second node N2 of the driving transistor DT and converts the voltage into a digital value, while the switching circuit senses the characteristic value.

[0075] The data driver 130 may also include a digital-to-analog converter (DAC) 132 and a switch RPRE for image driving. The DAC 132 is configured to convert image data RGB into analog gamma voltage to output a data voltage Vdata. Furthermore, the data driver 130 may also include latching circuitry and buffering circuitry for processing the image data RGB.

[0076] The ADC 131 and various switches SAM, SPRE, and RPRE can be located inside the data driver 130. Alternatively, the ADC 131 and various switches SAM, SPRE, and RPRE can be located outside the data driver 130.

[0077] The switching circuits SAM and SPRE controlling the sensing drive can be the sampling switch SAM and the sensing reference switch SPRE, respectively. The sensing reference switch SPRE controls the connection between each reference voltage line RVL and the sensing reference voltage supply node NpreS, which is provided with the reference voltage Vref, while the sampling switch SAM controls the connection between each reference voltage line RVL and the ADC 131.

[0078] Here, the sensing reference switch SPRE is the switch that controls the sensing drive, and the reference voltage Vref provided by the sensing reference switch SPRE to the reference voltage line RVL is the sensing reference voltage VpreS.

[0079] The image-driven reference switch RPRE controls the connection between each reference voltage line RVL and the image-driven reference voltage supply node Nprer, which provides the reference voltage Vref. The image-driven reference switch RPRE is a switch used for image driving, and the reference voltage Vref supplied to the reference voltage line RVL by the image-driven reference switch RPRE can be the image-driven reference voltage VpreR.

[0080] In other words, the sensing reference switch SPRE, acting as the first voltage switch, can apply the sensing reference voltage VpreS to the reference voltage line RVL. The image driving reference switch RPRE, acting as the second voltage switch, can apply the image driving reference voltage VpreR to the reference voltage line RVL.

[0081] At this point, the sensing reference switch SPRE and the image driving reference switch RPRE can be set separately or integrated into one unit. The sensing reference voltage VpreS and the image driving reference voltage VpreR can have the same voltage value or different voltage values.

[0082] The timing controller 140 may include a data compensator 141 configured to generate compensation data CD (i.e., determine compensation data CD), a memory 140 configured to store data for a long or short period of time, and a condition setter 143.

[0083] The memory 142 can store sensing data SD output from the ADC 131 or compensation data CD output from the data compensator 141.

[0084] The data compensator 141 can calculate new compensation data CD by comparing the sensing data SD and compensation data CD stored in the memory 142 to compensate for the deviation of the feature value. The compensation data CD calculated by the data compensator 141 can be stored in the memory 142.

[0085] The timing control unit 140 can use the compensation data CD stored in the memory 142 to compensate for the digital signal type image data RGB to be provided to the data driver 130.

[0086] The compensated image data RGB can be output to the data driver 130. Therefore, the data driver 130 converts the image data RGB compensated by the DAC 132 into an analog signal type data voltage Vdata. After completing the sensing processing of all lines, the compensated data voltage Vdata can be output to the corresponding data line DL through the output buffer. As a result, the eigenvalue deviation (threshold voltage deviation or mobility deviation) of the driving transistor DT in the corresponding pixel PX can be compensated.

[0087] Furthermore, the data compensator 141 can be located outside the timing controller 140 or included within the timing controller 140. The memory 142 can be located outside the timing controller 140 or implemented as a register within the timing controller 140.

[0088] Figure 4 It is a diagram used to illustrate the operation of each frame of a display device according to an exemplary embodiment of the present disclosure.

[0089] like Figure 4 As shown, during the driving period (activation time) of the Nth frame, the data voltage Vdata used for normal driving can be sequentially written to the pixel PX through multiple lines, so that multiple pixels PX can emit light (normal driving).

[0090] Next, during the blanking period (blanking time) of the Nth frame, a process can be performed to sense the eigenvalue deviations of the driving transistors in multiple pixels PX located in a specific line. At this time, the sensed data voltage Vdata can be applied to the multiple pixels in the specific line. The multiple pixels PX can be driven during the sensing process, causing them to not emit light.

[0091] During the blanking period (blanking time) of the Nth frame, the data voltage Vdata used for recovery driving is written to multiple pixels PX in a specific line that is being sensed during the blanking period (blanking time) of the Nth frame, causing the multiple pixels PX to emit light (recovery driving). The data voltage Vdata used for recovery driving can be equal to the data voltage Vdata used for image driving.

[0092] That is, the driving period (activation time) of the Nth frame can be divided into a first driving period and a second driving period. In the first driving period, the data voltage Vdata used for image driving is applied to multiple pixels PX before the blanking period (blanking time); in the second driving period, the recovery data voltage Vdata is applied to multiple pixels PX after the blanking period (blanking time). Therefore, the data voltage Vdata applied during the first driving period for normal driving can be represented as the first image data voltage Vdata, and the data voltage Vdata applied during the second driving period for recovery driving can be represented as the second image data voltage Vdata.

[0093] Furthermore, during the driving period (activation time) of the N+1th frame, the image data voltage Vdata compensated during the sensing process is sequentially written into the pixels PX in multiple lines, enabling the multiple pixels PX to emit light (normal driving).

[0094] In the following text, reference will be made to Figures 5 to 7Describes the operations during the first drive period, the blanking period, and the second drive period.

[0095] Figure 5 This is a timing diagram of signals used for normal driving during the first driving period of a display device according to an exemplary embodiment of the present disclosure.

[0096] refer to Figure 2 , Figure 3 and Figure 5 In a display device according to an exemplary embodiment of this disclosure, during a first driving period, an initialization step, a writing step, a light-emitting step, and a sampling step can be performed. Typically, the voltage of the second node N2 (i.e., the source of the driving transistor DT) or the second node N2 can be sensed by individually turning the switching transistor SWT and the sensing transistor SE on or off. Therefore, with... Figure 2 The difference shown can be used to perform sensing operations using an exemplary structure in which the scan signal SCAN and the sensing signal SENSE are applied to the switching transistor SWT and the sensing transistor SET respectively through two separate gate lines GL.

[0097] During the initialization step, the sensing transistor SET is turned on by the sensing signal SENSE, which is at the on level, and the reference switch RPRE is driven to turn on. In this state, the second node N2 (i.e., the source) of the driving transistor DT is initialized to the driving reference voltage VpreR.

[0098] During the write step, the switching transistor SWT is turned on by the scan signal SCAN, which is at the on level, and the first image data voltage Vdata for normal drive is written to the first node N1 of the drive transistor DT.

[0099] During the light-emitting step, based on the first image data voltage Vdata (normal drive) written to the first node N1, a voltage corresponding to the difference between the first image data voltage Vdata (normal drive) and the threshold voltage can be charged into the second node N2. Furthermore, the driving current flowing through the light-emitting diode 150 can be determined according to the voltage of the second node N2, causing the light-emitting diode 150 to emit light.

[0100] During the sampling step, the sampling switch SAM is turned on. At this time, the ADC 131 can sense a first voltage of the reference voltage line RVL connected through the sampling switch SAM and can convert the first voltage of the analog signal into the first data of the digital signal. Here, the first voltage applied to the ADC 131 can be the voltage of the second node N2 that saturates during the first drive period.

[0101] In other words, during the first driving period, when the image driving reference switch RPRE (i.e., the second voltage switch) is in the off state, the sensing reference switch SPRE (i.e., the first voltage switch) switches from the on state to the off state, and the sampling switch SAM is in the on state, the first voltage can be sampled.

[0102] Figure 6 This is a timing diagram of a signal used to sense mobility during the blanking period of a display device, according to an exemplary embodiment of this disclosure.

[0103] like Figure 6 As shown, the mobility sensing of the driving transistor DT can be performed during the blanking period in a display device according to an exemplary embodiment of the present disclosure, following the initialization step, the tracking step, and the sampling step.

[0104] During the initialization step, the switching transistor SWT is turned on by the scan signal SCAN, which is at the on level, and the first node N1 (i.e., the gate) of the driving transistor DT is initialized to the sensing data voltage Vdata for mobility sensing.

[0105] Furthermore, the sensing transistor SET can be turned on by the sensing signal SENSE, which is at the on level, and the sensing reference switch SPRE can also be turned on. In this state, the second node N2 (i.e., the source) of the driving transistor DT can be initialized to the sensing reference voltage VpreS.

[0106] The tracking step can be a step of tracking the mobility of the driving transistor DT. The mobility of the driving transistor DT can represent the current driving capability of the driving transistor DT, and the voltage of the second node N2 of the driving transistor DT, which represents the mobility of the driving transistor DT, can be tracked by the tracking step.

[0107] During the tracking step, the switching transistor SWT is turned off and the sensing reference switch SPRE is switched to the off level via the scan signal SCAN, which is at the off level. By doing so, both the first node N1 and the second node N2 of the driving transistor DT are floated, causing the voltages of both nodes N1 and N2 of the driving transistor DT to rise. Specifically, the voltage of the second node N2 of the driving transistor DT is initialized to the sensing reference voltage VpreS, and rises from the sensing reference voltage VpreS. At this time, the sensing transistor SET is turned on, so that the rise in the voltage of the second node N2 of the driving transistor DT leads to a rise in the second voltage of the reference voltage line RVL.

[0108] During the sampling step, when a predetermined time Δt has elapsed since the voltage at the second node N2 of the driving transistor DT began to rise, the sampling switch SAM is turned on. At this time, the ADC 131 can sense a second voltage of the reference voltage line RVL connected through the sampling switch SAM, and can convert the second voltage of the analog signal into second data of the digital signal. Here, the second voltage applied to the ADC 131 can correspond to the level (VpreS+ΔV) that rises from the sensed reference voltage VpreS to a predetermined voltage ΔV.

[0109] Here, the mobility of the driving transistor DT is proportional to the voltage change (ΔV / Δt) per unit time of the reference voltage line RVL during the tracking step; in other words, it is proportional to the slope of the voltage waveform of the reference voltage line RVL.

[0110] In other words, during the blanking period, when the sensing reference switch SPRE (first voltage switch) is in the off state, the image driving reference switch SPRE (second voltage switch) switches from the on state to the off state, and the sampling switch SAM is in the on state, the second voltage can be sampled.

[0111] Meanwhile, as mentioned above, when performing sensing processing during the blanking period, the pixel (PX) line for which sensing processing is performed can be randomly selected.

[0112] Figure 7 This is a timing diagram of signals used for normal driving during the second driving period of a display device according to an exemplary embodiment of the present disclosure.

[0113] refer to Figure 2 , Figure 3 and Figure 7 In the display device according to an exemplary embodiment of the present disclosure, an initialization step, a writing step, a light emission step, and a sampling step can be performed during the second driving period.

[0114] During the initialization step, the sensing transistor SET is turned on by the sensing signal SENSE, which is at the on level, and the driving reference switch RPRE is also turned on. In this state, the second node N2 (i.e., the source) of the driving transistor DT is initialized to the driving reference voltage VpreR.

[0115] During the write step, the switching transistor SWT is turned on by the scan signal SCAN, which is at the on level, and the second image data voltage Vdata used to recover the drive is written to the first node N1 (i.e., the gate) of the drive transistor DT.

[0116] During the light-emitting step, based on the second image data voltage Vdata (recovery drive) written to the first node N1, a voltage corresponding to the difference between the second image data voltage Vdata (recovery drive) and the threshold voltage can be charged into the second node N2. Furthermore, the driving current flowing through the light-emitting diode 150 can be determined according to the voltage of the second node N2, causing the light-emitting diode 150 to emit light.

[0117] During the sampling step, the sampling switch SAM is turned on. At this time, the ADC 131 can sense the third voltage of the reference voltage line RVL connected through the sampling switch SAM and convert the third voltage of the analog signal into the third data of the digital signal. Here, the third voltage applied to the ADC 131 can be the voltage of the second node N2 that is saturated during the second drive period.

[0118] The third voltage, represented by the solid line, may not be equal to the first voltage, represented by the dashed line. For example, the third voltage may be a level lower than the first voltage.

[0119] Specifically, during the first and third driving periods, the degree of RC delay can vary depending on the driving conditions (grayscale and frequency conditions) of the display panel 110. Therefore, the third voltage sampled during the second driving period can be lower than the first voltage sampled during the first driving period.

[0120] In other words, during the second driving period, when the image driving reference switch RPRE (i.e., the second voltage switch) is in the off state, the sensing reference switch SPRE (i.e., the first voltage switch) switches from the on state to the off state, and the sampling switch SAM is in the on state, the third voltage can be sampled.

[0121] Figure 8 This is a block diagram of a timing controller 140 of a display device according to an exemplary embodiment of the present disclosure.

[0122] The operation of the timing controller 140 of the display device according to an exemplary embodiment of the present disclosure will be described in detail below.

[0123] The data compensator 141 can compensate for the image data RGB based on the sensed data SD output from the ADC 131.

[0124] Specifically, the data compensator 141 can compare the first sensing data SD1 with the third sensing data SD3 to calculate the first compensation data CD1, which reflects the difference between the voltages in the first driving period and the second driving period.

[0125] Therefore, the data compensator 141 can compare the first sensed data SD1 with the third sensed data SD3 to determine the difference in data voltage Vdata before and after the blanking period. Furthermore, it can calculate first compensation data CD1 reflecting the offset of the data voltage Vdata. The first compensation data CD1 can be stored in memory 142.

[0126] The data compensator 141 can compare the second sensing data SD2 with the reference data stored in the memory 142 to calculate the second compensation data CD2 that reflects the mobility of the driving transistor DT.

[0127] Data compensator 141 can determine the mobility of the driving transistor DT in the corresponding pixel PX using the second sensing data SD2. Furthermore, data compensator 142 can compare reference data stored in memory 142 with the second sensing data SD2 to calculate second compensation data CD2 reflecting the deviation in the mobility of the driving transistor DT. The second compensation data CD2 can be stored in memory 142.

[0128] The data compensator 141 can use the first compensation data CD1 and the second compensation data CD2 stored in the memory 142 to compensate for the RGB image data.

[0129] Specifically, when image data RGB is compensated, it means that the input image data RGB is determined by applying a first gain according to the first compensation data CD1 and a second gain according to the second compensation data CD2.

[0130] At the same time, such as Figure 8 As shown, the condition setter 143 can set the driving conditions for multiple pixels PX. That is, the condition setter 143 can set the data driver 130 to output multiple data voltages Vdata according to all driving conditions.

[0131] All driving conditions can refer to driving frequency, driving grayscale, and driving color. For example, the condition setter 143 can set driving condition information to allow the data driver 130 to output a first image data voltage and a second image data voltage according to each of 60Hz, 120Hz, and 240Hz. Furthermore, the condition setter 143 can set driving condition information to allow the data driver 130 to output a first image data voltage and a second image data voltage according to each of a plurality of grayscale levels (0 grayscale to 255 grayscale). Therefore, the data compensator 141 can calculate a first compensation data CD1 and a second compensation data CD2 for each of all driving conditions.

[0132] Therefore, the display device according to the exemplary embodiment of this disclosure can not only compensate the characteristic value of the driving transistor according to the second compensation data CD2 for each of all driving conditions, but also compensate the difference in data voltage Vdata before and after the blanking period according to the first compensation data CD1. Therefore, in the display device according to the exemplary embodiment of this disclosure, the driving image before and after the blanking period of the sensing can be completely identical. Therefore, the display device according to the exemplary embodiment of this disclosure can suppress image quality degradation caused by sensing.

[0133] Furthermore, the display device according to the exemplary embodiments of this disclosure performs sensing processing on all driving conditions, thereby extending the processing time. Therefore, the aforementioned sensing processing can be performed after the power to the display device is turned off.

[0134] In the following text, reference will be made to Figure 9 A driving method for a display device according to an exemplary embodiment of the present disclosure is described. The driving method for a display device according to an exemplary embodiment of the present disclosure will be described based on the aforementioned premise of the display device according to the exemplary embodiment of the present disclosure. Therefore, Figures 1 to 8 The reference numerals in the accompanying drawings will be used as is.

[0135] Figure 9 This is a flowchart for explaining a driving method for a display device according to an exemplary embodiment of the present disclosure.

[0136] like Figure 9 As shown, the driving method S100 of the display device according to an exemplary embodiment of the present disclosure may include a normal driving step S110, a first sensing step (normal driving voltage sensing) S120, a second sensing step (α sensing) S130, a third sensing step (recovery driving voltage sensing) S140, a data compensation step S150, and a condition setting step (all condition checks) S160.

[0137] In the normal driving step S110, the data voltage Vdata used for normal driving can be sequentially written into the pixels PX in multiple lines, enabling the multiple pixels PX to emit light. Specifically, refer to... Figure 5 In a display device according to an exemplary embodiment of the present disclosure, during a first driving period, a plurality of pixels PX can emit light through an initialization step, a writing step, and an emission step.

[0138] In the first sensing step S120, multiple pixels PX can be sensed during the first driving period. For example... Figure 5As shown, in the first sensing step S120, during the first driving period, when the sampling switch SAM is turned on, the ADC 131 can sense the first voltage of the reference voltage line RVL connected through the sampling switch SAM, and can convert the first voltage of the analog signal into the first data of the digital signal.

[0139] In the second sensing step S130, multiple pixels PX can be sensed during the blanking period. For example... Figure 6 As shown, in the second sensing step S130, during the blanking period, when the sampling switch SAM is turned on, the ADC 131 senses the second voltage of the reference voltage line RVL connected through the sampling switch SAM, and can convert the second voltage of the analog signal into the second data of the digital signal.

[0140] In the third sensing step S140, multiple pixels PX can be sensed during the second driving period. For example... Figure 7 As shown, in the third sensing step S140, during the second driving period, when the sampling switch SAM is turned on, the ADC 131 can sense the third voltage of the reference voltage line RVL connected through the sampling switch SAM, and can convert the third voltage of the analog signal into the third data of the digital signal.

[0141] In the data compensation step S150, the data voltage can be compensated based on the first to third sensing data.

[0142] like Figure 8 and Figure 9 As shown, in the data compensation step S150, the first sensing data SD1 and the third sensing data SD3 can be compared with each other to calculate first compensation data CD1 reflecting the difference between the voltages in the first driving period and the second driving period. Specifically, in the data compensation step S150, the first sensing data SD1 and the third sensing data SD3 are compared to determine the difference in data voltage Vdata before and after the blanking period. Furthermore, the first compensation data CD1 reflecting the offset of the data voltage Vdata can be calculated.

[0143] like Figure 8 and Figure 9 As shown, in the data compensation step S150, the second sensing data SD is compared with the reference data stored in the memory 142 to calculate the second compensation data CD2 reflecting the mobility of the driving transistor. Specifically, in the data compensation step S150, the mobility of the driving transistor DT in the corresponding pixel PX can be determined by the second sensing data SD2. Furthermore, the reference data stored in the memory 142 is compared with the second sensing data SD2 to calculate the second compensation data CD2 reflecting the deviation of the mobility of the driving transistor DT.

[0144] In the data compensation step S150, image data RGB can be compensated based on first compensation data CD1 and second compensation data CD2. Specifically, when image data RGB is compensated, it means that a first gain based on the first compensation data CD1 and a second gain based on the second compensation data CD2 are applied to the image data RGB to determine the compensated image data RGB. Therefore, in the data compensation step S150, the first compensation data CD1 and the second compensation data CD2 can be reflected in the output data voltage.

[0145] In the condition setting step S160, multiple data voltages Vdata can be output according to all driving conditions.

[0146] Specifically, the data driver 130 can output a first image data voltage and a second image data voltage according to each of 60Hz, 120Hz and 240Hz, or the data driver can output a first image data voltage and a second image data voltage according to each of a plurality of gray levels (0 gray level to 255 gray level).

[0147] Therefore, in the condition setting step S160, when multiple data voltages Vdata are output according to all driving conditions, the compensation process ends; otherwise, the program returns to the normal driving step S110 and repeats the compensation process until the pixel is driven under all driving conditions.

[0148] Therefore, in the driving method of the display device according to an exemplary embodiment of the present disclosure, for each of all driving conditions, not only can the characteristic value of the driving transistor be compensated according to the second compensation data CD2, but the difference in data voltage Vdata before and after the blanking period can also be compensated according to the first compensation data CD1. Therefore, by using the driving method of the display device according to an exemplary embodiment of the present disclosure, the driving image before and after the sensing blanking period can become completely identical.

[0149] Exemplary embodiments of this disclosure can also be described as follows:

[0150] A display device according to an exemplary embodiment of the present disclosure may include: a display panel including a plurality of pixels, the display panel being configured to be driven during a first driving period, a blanking period following the first driving period, and a second driving period following the blanking period; a data driver, the data driver being configured to provide a data voltage to at least one pixel during the first driving period and the second driving period to display an image based on a compensated image data, and to detect a voltage from a reference voltage line connected to at least one pixel to convert the voltage into sensing data; and a timing controller, the timing controller being configured to determine first compensation data based on the difference between the sensing data detected during the first driving period and the sensing data detected during the second driving period, and to determine the compensated image data based on input image data and the first compensation data.

[0151] In some embodiments of this disclosure, during a first driving period, the data driver may be configured to apply a first image data voltage to at least one pixel and detect a first voltage on a reference voltage line; during a blanking period, the data driver may be configured to apply a sense data voltage to at least one pixel and detect a second voltage on the reference voltage line; and during a second driving period, the data driver may apply a second image data voltage to at least one pixel and detect a third voltage on the reference voltage line.

[0152] In some embodiments of this disclosure, the first image data voltage may be equal to the second image data voltage.

[0153] In some embodiments of this disclosure, the data driver may include: an analog-to-digital converter configured to convert voltage into sensed data; a digital-to-analog converter configured to convert compensated image data into data voltage; and a plurality of switches configured to be connected to a reference voltage line.

[0154] In some embodiments of this disclosure, the multiple switches may include: a first voltage switch configured to apply a drive reference voltage to a reference voltage line; a second voltage switch configured to apply a sensed reference voltage to the reference voltage line; and a sampling switch configured to connect the reference voltage line and an analog-to-digital converter.

[0155] In some embodiments of this disclosure, during the first driving period, the second voltage switch may be configured to be in an off state; and the analog-to-digital converter may be configured to sample the first voltage using a sampling switch in the on state to determine the first sensing data after the first voltage switch switches from an on state to an off state.

[0156] In some embodiments of this disclosure, during the blanking period, the first voltage switch may be configured to be in an off state; and the analog-to-digital converter may be configured to sample the second voltage using a sampling switch in an on state to determine the second sensing data after the second voltage switch switches from an on state to an off state.

[0157] In some embodiments of this disclosure, during the second driving period, the second voltage switch may be configured to be in an off state; and the analog-to-digital converter may be configured to sample the third voltage using a sampling switch in an on state to determine third sensing data after the first voltage switch switches from an on state to an off state.

[0158] In some embodiments of this disclosure, the timing controller may be further configured to determine first compensation data based on the difference between the first sensing data and the third sensing data, and to determine the image data to be compensated based on the first compensation data.

[0159] In some embodiments of this disclosure, the timing controller may be further configured to determine second compensation data based on second sensing data, and to determine compensated image data based on the second compensation data.

[0160] In some embodiments of this disclosure, the timing controller includes: a data compensator configured to determine first compensation data and determine compensated image data based on the first compensation data; and a memory configured to store sensing data and the first compensation data.

[0161] In some embodiments of this disclosure, the data compensator is configured to compare sensing data detected during a first drive period with sensing data detected during a second drive period to determine first compensation data.

[0162] In some embodiments of this disclosure, during the blanking period, the data driver may be configured to apply sensing data to at least one pixel and detect second sensing data on a reference voltage line, and the data compensator may be further configured to determine second compensation data based on the second sensing data, the second compensation data reflecting a deviation in the mobility of the driving transistor of at least one pixel, and to determine compensated image data based on the first compensation data and the second compensation data.

[0163] In some embodiments of this disclosure, the timing controller further includes a condition setter configured to set driving conditions for at least one pixel.

[0164] In some embodiments of this disclosure, the condition setter configures the data driver to output a data voltage based on each of a plurality of drive frequencies and based on each of a plurality of grayscale values.

[0165] According to an exemplary embodiment of the present disclosure, a method for driving a display device is provided, the display device comprising: a display panel including a plurality of pixels and a data driver configured to provide a data voltage to at least one pixel, the display panel being driven during a first driving period and a second driving period of displaying an image and during a blanking period between the first driving period and the second driving period, the method comprising: detecting a first voltage on a reference voltage line connected to at least one pixel during the first driving period and determining first sensing data based on the first voltage; detecting a second voltage on the reference voltage line connected to at least one pixel during the blanking period and determining second sensing data based on the second voltage; detecting a third voltage on the reference voltage line connected to at least one pixel during the second driving period and determining third sensing data based on the third voltage; determining compensated image data based on at least one of the first, second, and third sensing data; and applying the data voltage to at least one pixel based on the compensated image data.

[0166] In some embodiments of this disclosure, determining the image data to be compensated may include: determining first compensation data based on the difference between first sensing data and second sensing data, and determining the image data to be compensated based on the first compensation data.

[0167] In some embodiments of this disclosure, determining the compensated image data may include: determining first compensation data based on the difference between first sensing data and second sensing data, determining second compensation data based on the second sensing data, the second compensation data reflecting the deviation in the mobility of the driving transistor disposed in at least one pixel, and determining the compensated image data based on the first compensation data and the second compensation data.

[0168] In some embodiments of this disclosure, determining the first sensing data may include sampling a first voltage to convert the first voltage into first sensing data; determining the second sensing data may include sampling a second voltage to convert the second voltage into second sensing data; and determining the third sensing data may include sampling a third voltage to convert the third voltage into third sensing data.

[0169] In some embodiments of this disclosure, the method may further include configuring a data driver to apply a data voltage to at least one pixel based on each of a plurality of drive frequencies and based on each of a plurality of grayscale values.

[0170] Although exemplary embodiments of the present disclosure have been described in detail with reference to the accompanying drawings, the present disclosure is not limited thereto and may be implemented in many different forms without departing from the technical concept of the present disclosure. Therefore, the exemplary embodiments of the present disclosure are provided for illustrative purposes only and are not intended to limit the technical concept of the present disclosure. The scope of the technical concept of the present disclosure is not limited thereto. Therefore, it should be understood that the above exemplary embodiments are exemplary in all respects and do not limit the present disclosure. The scope of protection of the present disclosure should be interpreted based on the appended claims, and all technical concepts within the equivalent scope thereof should be construed as falling within the scope of the present disclosure.

[0171] It will be apparent to those skilled in the art that various modifications and variations can be made to this disclosure without departing from the technical concept or scope thereof. Therefore, embodiments of this disclosure cover such modifications and variations as long as they fall within the scope of the appended claims and their equivalents.

Claims

1. A display device, comprising: A display panel comprising multiple pixels, the display panel being driven during a first driving period, a blanking period following the first driving period, and a second driving period following the blanking period; The data driver is configured as follows: Provide a data voltage to at least one of the pixels to display an image based on the compensated image data; and During the first driving period and the second driving period, a voltage from a reference voltage line connected to at least one of the pixels is detected to convert the voltage into sensing data; and Timing controller, the timing controller is configured as follows: The first compensation data is determined based on the difference between the sensing data detected during the first driving period and the sensing data detected during the second driving period; and The image data to be compensated is determined based on the input image data and the first compensation data. Wherein, at least one pixel among the pixels includes a driving transistor, and The detected voltage from the reference voltage line corresponds to the voltage at the output terminal of the driving transistor.

2. The display device according to claim 1, wherein: During the first driving period, the data driver is configured to apply a first image data voltage to at least one of the pixels and detect a first voltage on the reference voltage line. During the blanking period, the data driver is configured to apply a sensed data voltage to at least one of the pixels and detect a second voltage on the reference voltage line. During the second driving period, the data driver is configured to apply a second image data voltage to at least one of the pixels and detect a third voltage on the reference voltage line.

3. The display device according to claim 2, wherein the first image data voltage is equal to the second image data voltage.

4. The display device according to claim 1, wherein the data driver comprises: Configured as an analog-to-digital converter to convert the voltage into the sensed data; A digital-to-analog converter configured to convert the compensated image data into the data voltage; and Multiple switches connected to the reference voltage line.

5. The display device according to claim 4, wherein the plurality of switches comprises: A first voltage switch configured to apply a driving reference voltage to the reference voltage line; A second voltage switch configured to apply a sensed reference voltage to the reference voltage line; and A sampling switch configured to connect the reference voltage line and the analog-to-digital converter.

6. The display device according to claim 5, wherein during the first driving period: The second voltage switch is configured to be in the off state; and The analog-to-digital converter is configured to, after the first voltage switch switches from an on state to an off state, use the sampling switch, which is in the on state, to sample the first voltage on the reference voltage line to determine the first sensing data.

7. The display device according to claim 6, wherein during the blanking period: The first voltage switch is configured to be in the off state; and The analog-to-digital converter is configured to, after the second voltage switch switches from the on state to the off state, use the sampling switch in the on state to sample the second voltage on the reference voltage line to determine the second sensing data.

8. The display device according to claim 7, wherein during the second driving period: The second voltage switch is configured to be in the off state; and The analog-to-digital converter is configured to sample a third voltage on the reference voltage line using a sampling switch that is in the on state to determine third sensing data after the first voltage switch switches from the on state to the off state.

9. The display device of claim 8, wherein the timing controller is further configured to determine the first compensation data based on the difference between the first sensing data and the third sensing data, and to determine the compensated image data based on the first compensation data.

10. The display device of claim 9, wherein the timing controller is further configured to determine the second compensation data based on the second sensing data, and to determine the compensated image data based on the first compensation data and the second compensation data.

11. The display device according to claim 1, wherein the timing controller comprises: A data compensator is configured to determine the first compensation data and, based on the first compensation data, determine the compensated image data; and The memory is configured to store the sensing data and the first compensation data.

12. The display device according to claim 11, The data compensator is configured to compare sensing data detected during the first drive period with sensing data detected during the second drive period to determine the first compensation data.

13. The display device according to claim 11, wherein: During the blanking period, the data driver is configured to apply a sensed data voltage to at least one of the pixels and detect second sensed data on the reference voltage line. The data compensator is further configured as follows: A second compensation data is determined based on the second sensing data, the second compensation data reflecting the deviation in the mobility of the driving transistor of the at least one pixel in the pixels; and The image data to be compensated is determined based on the first compensation data and the second compensation data.

14. The display device of claim 1, wherein the timing controller further comprises a condition setter configured to set driving conditions for the at least one pixel among the pixels.

15. The display device of claim 14, wherein the condition setter is configured to set the data driver to output the data voltage to the at least one of the pixels based on each of a plurality of driving frequencies and based on each of a plurality of gray levels.

16. A method of driving a display device, the display device comprising: The method includes a display panel comprising a plurality of pixels and a data driver configured to provide a data voltage to at least one of the pixels, the display panel being configured to be driven during a first driving period and a second driving period for displaying an image and during a blanking period between the first driving period and the second driving period, the method comprising: During the first driving period, a first voltage on a reference voltage line connected to at least one of the pixels is detected, and first sensing data is determined based on the first voltage. During the blanking period, a second voltage on the reference voltage line is detected, and second sensing data is determined based on the second voltage; During the second driving period, a third voltage on the reference voltage line is detected, and third sensing data is determined based on the third voltage; The compensated image data is determined based on at least one of the first, second, and third sensing data; and The data voltage is applied to at least one pixel among the pixels based on the compensated image data. Wherein, at least one pixel in the pixels includes a driving transistor. Wherein, the voltage detected on the reference voltage line corresponds to the voltage at the output terminal of the driving transistor, and The determination of the compensated image data includes: First compensation data is determined based on the difference between the first sensing data and the second sensing data, and the compensated image data is determined based on the first compensation data; or, First compensation data is determined based on the difference between the first sensing data and the second sensing data, second compensation data is determined based on the second sensing data, and the compensated image data is determined based on the first compensation data and the second compensation data.

17. The method of claim 16, wherein the second compensation data reflects a deviation in the mobility of the driving transistor in the at least one pixel disposed in the pixels.

18. The method of claim 16, wherein: Determining the first sensing data includes sampling the first voltage to convert the first voltage into the first sensing data; Determining the second sensing data includes sampling the second voltage to convert the second voltage into the second sensing data; and Determining the third sensing data includes sampling the third voltage to convert the third voltage into the third sensing data.

19. The method of claim 16, further comprising: The data driver is configured to apply the data voltage to at least one of the pixels based on each of a plurality of driving frequencies and each of a plurality of gray levels.

Images