Display device and method for driving the same

Abstract

A display device including a plurality of displays and a method for driving the display device are provided. The display device includes a first display having a first pixel, a second display having a second pixel, a first driver configured to drive the first display, a second driver configured to drive the second display, a controller configured to control the first driver and the second driver, a first power supply configured to supply a first power to the first display and the second display, and a second power supply configured to supply a second power to the first display and the second display. The second power supply includes a first voltage source configured to generate a first voltage, a second voltage source configured to generate a second voltage, a first switch configured to connect the first display to any one of the first voltage source and the second voltage source, and a second switch configured to connect the second display to one of the first voltage source and the second voltage source.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2019-0062609, filed on May 28, 2019, the disclosure of which is hereby incorporated by reference in its entirety. Technical Field

[0003] Various embodiments of the present disclosure relate to a display device and a method for driving the display device. Background Art

[0004] Recently, various forms of display devices including foldable display devices and rollable display devices have been developed. For example, a foldable display device includes multiple displays on both sides of the device, so that the display device can be used in a folded state and an unfolded state. Accordingly, the foldable display device can provide the convenience of portability while realizing a large screen as needed. Summary of the invention

[0005] Various embodiments of the present disclosure relate to a display device including a plurality of displays and a method of driving the display device.

[0006] Embodiments of the present disclosure may provide a display device. The display device may include a first display having a first pixel, a second display having a second pixel, a first driver configured to drive the first display, a second driver configured to drive the second display, a controller configured to control the first driver and the second driver, a first power supply configured to supply a first power to the first display and the second display, and a second power supply configured to supply a second power to the first display and the second display. The second power supply may include a first voltage source configured to generate a first voltage, a second voltage source configured to generate a second voltage, a first switch configured to connect the first display to any one of the first voltage source and the second voltage source, and a second switch configured to connect the second display to any one of the first voltage source and the second voltage source.

[0007] In an embodiment, the first display can be driven in a display mode or a sensing mode. When the first display is driven in the display mode, the first switch can connect the first display to a first voltage source, and when the first display is driven in the sensing mode, the first switch can connect the first display to a second voltage source.

[0008] In an embodiment, the first voltage may be set to a low level voltage that enables the first pixel to emit light, and the second voltage may be set to a high level voltage that prevents the first pixel from emitting light.

[0009] In an embodiment, the second display may be driven in a display mode or a sensing mode, and when the first display is driven in the display mode, the second display may be driven in the sensing mode.

[0010] In an embodiment, the second switch may couple the second display to the first voltage source when the second display is driven in the display mode, and the second switch may couple the second display to the second voltage source when the second display is driven in the sensing mode.

[0011] In an embodiment, each of the first pixel and the second pixel may include a light emitting element connected between a first power source and a second power source, a first transistor connected between the first power source and the light emitting element and configured to control a driving current supplied to the light emitting element in response to a voltage of a first node, a second transistor connected between the first node and a data line and turned on when a scan signal is supplied to the scan line, a third transistor connected between a sensing line and a second node located between the light emitting element and the first transistor and turned on when a control signal is supplied to the control line, and a storage capacitor connected between the first node and one electrode or a second node of the first transistor.

[0012] In an embodiment, each of the first driver and the second driver may include a scan driver configured to supply a scan signal to a scan line, a control line driver configured to supply a control signal to a control line, a data driver configured to supply a data signal or a reference voltage to the data line, and a sensor connected to the sensing line and configured to generate an output signal corresponding to the voltage of the second node.

[0013] In an embodiment, the reference voltage may be set to a voltage capable of turning on the first transistor during each sensing period for detecting characteristic information of the first pixel or the second pixel.

[0014] In an embodiment, before the reference voltage is supplied to the data line, the sensor may supply a precharge voltage lower than the reference voltage to the sensing line.

[0015] In an embodiment, the controller may include a compensator configured to convert input image data in response to an output signal from the sensor and supply the converted image data to the data driver.

[0016] In an embodiment, the compensator may convert the input image data to compensate for the characteristic variation of the first pixel and the second pixel.

[0017] In an embodiment, the display device may further include a base member located between the first display and the second display, and the first display and the second display may be located on both sides of the base member to overlap each other.

[0018] An embodiment of the present disclosure may provide a method for driving a display device, wherein the display device includes a first display having a first pixel and a second display having a second pixel. The driving method may include: displaying an image in the first display during a period in which a first operating power is supplied to the first display so that the first pixel can emit light; and during at least one period during which the image is displayed in the first display, detecting characteristic information of the second pixel during a period in which a second operating power is supplied to the second display to prevent the second pixel from emitting light. During the detection of the characteristic information of the second pixel, the first display may be connected to a first voltage source of a second power supply, and the second display may be connected to a second voltage source of the second power supply.

[0019] In an embodiment, the first operating power may include the first power having a high voltage and the second power having a low voltage, and the second operating power may include the first power having a fixed high voltage and the second power having a set or predetermined high voltage.

[0020] In an embodiment, the driving method may further include: displaying an image in the second display by supplying the first operating power to the second display. In addition, the driving method may further include: detecting feature information of the first pixel by supplying the second operating power to the first display during at least one period during which the image is displayed in the second display.

[0021] An embodiment of the present disclosure may provide a method for driving a display device, wherein the display device includes a first display having a first pixel and a second display having a second pixel. The driving method may include: displaying an image in the first display, and detecting characteristic information of the second pixel during at least one time period when the image is displayed in the first display. Detecting the characteristic information of the second pixel may include: supplying a precharge voltage having a first low voltage to a sensing line connected to the second pixel; supplying a reference voltage having a second low voltage higher than the first low voltage to the sensing line to prevent the second pixel from emitting light; and detecting the characteristic information of the second pixel by connecting the sensing line to a sensor.

[0022] In an embodiment, first power and second power having a potential difference therebetween so that the first and second pixels emit light may be supplied to the first and second displays, and the second low voltage may be set to a voltage lower than each of the first power and the second power. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1A and Figure 1B is a perspective view schematically showing a display device according to an embodiment of the present disclosure.

[0024] Figure 2is a block diagram illustrating a display device according to an embodiment of the present disclosure.

[0025] Figure 3 It is shown Figure 2 0 is a block diagram of an embodiment of the respective display and a driver for driving the respective display shown in .

[0026] Figure 4 is a circuit diagram showing a pixel according to an embodiment of the present disclosure, and shows, for example, Figure 3 An implementation of a pixel in a display.

[0027] Figure 5 It is shown Figure 3 A block diagram of an implementation of a data driver, sensor, and compensator is shown in FIG.

[0028] Figure 6 is a waveform diagram illustrating a driving method of a display device according to an embodiment of the present disclosure, and illustrates an embodiment of a method for sensing characteristic information of each pixel during a sensing period, for example.

[0029] Figure 7 is a block diagram showing a display device according to an embodiment of the present disclosure, and shows, for example, Figure 2 Embodiments related to the power components shown in .

[0030] Figure 8 is a waveform diagram showing a method for driving a display device according to an embodiment of the present disclosure, and shows, for example, Figure 7 An embodiment of a method in which a second power source supplies a second power is shown in FIG.

[0031] Fig. 9 is a block diagram showing a display device according to an embodiment of the present disclosure, and shows, for example, Figure 2 Another embodiment related to the power components shown in .

[0032] Fig.10 It shows that according to Fig. 9 1 and 2. A waveform diagram of a driving method of a display device according to an embodiment of the present invention is provided, and illustrates an embodiment of a method for sensing characteristic information of each pixel during a sensing period, for example. DETAILED DESCRIPTION

[0033] Because the present disclosure can be appropriately changed and can have various embodiments, specific embodiments will be described in more detail below with reference to the accompanying drawings. However, it should be noted that the present disclosure is not limited to the following embodiments and can be implemented in various forms. In addition, in the following description, as long as it is not specifically mentioned in the sentence, the singular form may include the plural form.

[0034] In the accompanying drawings, parts that are not directly related to the present disclosure will be omitted to clarify the description of the present disclosure. In addition, the size and related dimensions of some elements may be enlarged in the accompanying drawings. In the accompanying drawings, identical or similar elements are represented by identical reference numerals, even if they are depicted in different accompanying drawings, and repeated descriptions will be omitted.

[0035] Figure 1A and Figure 1B 1 is a perspective view schematically showing a display device 10 according to an embodiment of the present disclosure. According to an embodiment, Figure 1A and Figure 1B A foldable display device is disclosed, and the foldable display device includes a plurality of displays and can be used in a folded or unfolded state. However, the display device 10 according to the present disclosure is not limited to the foldable display device, and the type and structure of the display device 10 may be appropriately changed according to the embodiment.

[0036] Reference Figure 1A and Figure 1B , the display device 10 according to an embodiment of the present disclosure includes a base member 10A, a first display DA1 and a second display DA2, wherein each of the first display DA1 and the second display DA2 is located at any one surface of the base member 10A. For example, the first display DA1 and the second display DA2 may be located on different (e.g., opposite) surfaces of the base member 10A. For example, the first display DA1 and the second display DA2 may be on both sides (e.g., opposite sides) of the base member 10A so as to overlap each other by interposing the base member 10A therebetween. However, in some embodiments, the positions of the first display DA1 and the second display DA2 may be appropriately changed. For example, in another embodiment, the first display DA1 and the second display DA2 may be on the same surface of the base member 10A so as to be adjacent to each other.

[0037] The base member 10A is a base layer (or base structure) for forming a panel of the display device 10, and can be configured with a single layer or multiple layers. According to an embodiment, the base member 10A may include a rigid or flexible substrate or film, and its material or properties are not limited to a specific material or property. When the display device 10 is a foldable display device, the base member 10A has flexibility in at least one region thereof or includes a hinge structure or the like, whereby the display device 10 can be manufactured so that the display device 10 can be folded or unfolded.

[0038] The first display DA1 may be located on the first surface 10A1 of the base member 10A, and the second display DA2 may be located on the second surface 10A2 of the base member 10A. The first surface 10A1 and the second surface 10A2 of the base member 10A may be surfaces facing each other, but are not limited thereto. In addition, the second display DA2 may overlap with at least one area of ​​the first display DA1. For example, the second display DA2 may have a smaller area than the first display DA1, and may be placed to overlap with an area of ​​the first display DA1. However, in some embodiments, the relative sizes (e.g., areas) and / or relative arrangements of the first display DA1 and the second display DA2 may be appropriately changed.

[0039] In an embodiment, the first display DA1 and the second display DA2 may be driven in different time periods. For example, the first display DA1 is driven in a state where the display device 10 is unfolded (e.g., activated as a display mode), thereby displaying an image or information corresponding to the input image data. The second display DA2 is driven in a state where the display device 10 is folded, thereby displaying an image or information corresponding to the input image data or a set or predetermined image or information corresponding to the standby screen.

[0040] The display device 10 includes a first display DA1 and a second display DA2 on both sides, so that the display device 10 can be used in a folded or unfolded state. For example, in a state where the display device 10 is unfolded to expose the first display DA1, the display device 10 can be driven to display a large screen image. Alternatively, in a state where the display device 10 is folded to expose the second display DA2, the second display DA2 can be driven to display an image, so that a desired image or information can be displayed without unfolding the display device 10. According to the display device 10, improved usability and portability can be provided.

[0041] Figure 2 1 is a block diagram showing a display device 10 according to an embodiment of the present disclosure. Figure 1A and Figure 1B As in the embodiment of the present invention, according to the embodiment, Figure 2 Embodiments are disclosed relating to components of a display device 10 including a plurality of displays.

[0042] Reference Figures 1A to 2According to an embodiment of the present disclosure, the display device 10 may include a first display panel 110, a second display panel 120, a first driver 210, a second driver 220, a controller 300 and a power component 400, wherein the first display panel 110 and the second display panel 120 respectively include a first display DA1 and a second display DA2, the first driver 210 and the second driver 220 are configured to drive the first display panel 110 and the second display panel 120, the controller 300 is configured to control the first driver 210 and the second driver 220, and the power component 400 supplies operating power to the first display panel 110 and the second display panel 120.

[0043] The first display panel 110 includes a first display DA1 having a first pixel PX1. The second display panel 120 includes a second display DA2 having a second pixel PX2.

[0044] In an embodiment, the first display panel 110 and the second display panel 120 may be combined with each other after they are produced separately. For example, the first display panel 110 and the second display panel 120 may be produced separately. Then, the first display panel 110 and the second display panel 120 are bonded to the base member 10A and combined with each other through the base member 10A, or the second display panel 120 is directly bonded to one surface of the first display panel 110, whereby the first display panel 110 and the second display panel 120 may be combined with each other. In another embodiment, the first display panel 110 and the second display panel 120 may be produced to form a single body. For example, the first display panel 110 and the second display panel 120 share a single base member 10A, and each of the first display DA1 and the second display DA2 may be located on any one surface of the base member 10A.

[0045] The first display panel 110 and the second display panel 120 may be driven in different periods or may be driven separately. In view of this, the display device 10 may include a first driver (or referred to as a "first panel driver") 210 and a second driver (or referred to as a "second panel driver") 220.

[0046] The first driver 210 is used to drive the first display DA1 and generate various types of driving signals required to drive the first pixel PX1. For example, the first driver 210 may include a first scan driver and a first data driver, wherein the first scan driver and the first data driver are configured to supply respective scan signals (or referred to as "first scan signals SS1") and respective data signals (or referred to as "first data signals DS1") to the first pixel PX1. In addition, according to the structure and / or driving method of the first pixel PX1, the first driver 210 may also include at least one of a first emission control driver, a first control line driver, and a first sensor. For example, when the first pixel PX1 is driven by respective scan signals, data signals, and control signals, and when the characteristics of the first pixel PX1 detected by using the control signal are used to compensate for the characteristic changes of the first pixel PX1, the first driver 210 may also include a first control line driver and a first sensor.

[0047] The second driver 220 is used to drive the second display DA2 and generate various types of driving signals required to drive the second pixel PX2. For example, the second driver 220 may include a second scan driver and a second data driver, wherein the second scan driver and the second data driver are configured to supply respective scan signals (or referred to as "second scan signals SS2") and respective data signals (or referred to as "second data signals DS2") to the second pixel PX2. In addition, depending on the structure and / or driving method of the second pixel PX2, the second driver 220 may also include at least one of a second emission control driver, a second control line driver, and a second sensor. For example, when the second pixel PX2 is driven by respective scan signals, data signals, and control signals, and when the characteristics of the second pixel PX2 detected by using the control signal are used to compensate for the characteristic changes of the second pixel PX2, the second driver 220 may also include a second control line driver and a second sensor.

[0048] The first driver 210 and the second driver 220 may be produced and / or arranged separately, or at least a portion of the first driver 210 and at least a portion of the second driver 220 may be integrated and / or arranged together in a single integrated circuit. In addition, the first driver 210 and the second driver 220 may be produced and / or arranged separately from the first display panel 110 and the second display panel 120, or at least a portion of the first driver 210 and the second driver 220 may be integrated with the first display panel 110 and the second display panel 120 to form a single body. For example, the first driver 210 may be produced separately from the first display panel 110 and electrically connected to the first display panel 110, or at least a portion of the first driver 210 (e.g., the first scan driver, etc.) may be arranged or mounted on the first display panel 110 together with the first pixel PX1. Similarly, the second driver 220 may be produced separately from the second display panel 120 and electrically connected to the second display panel 120, or at least a portion of the second driver 220 (e.g., the second scan driver, etc.) may be arranged or mounted on the second display panel 120 together with the second pixel PX2.

[0049] The controller 300 is used to control the first driver 210 and the second driver 220, and to generate various types of control signals required to drive the first driver 210 and the second driver 220. For example, the controller 300 may generate the first control signal CONT1 and the second control signal CONT2 by using a timing signal TCS (e.g., a vertical / horizontal synchronization signal and a main clock signal, etc.) supplied from a host processor, etc., and supply the first control signal CONT1 and the second control signal CONT2 to the first driver 210 and the second driver 220, respectively.

[0050] The first control signal CONT1 may include various appropriate types of control signals for controlling the first driver 210. For example, the first control signal CONT1 may include a first scan control signal (e.g., a first gate sampling pulse and a first gate sampling clock, etc.) for controlling the first scan driver and a first data control signal (e.g., a first source sampling pulse, a first source sampling clock, and a first source output enable signal, etc.) for controlling the first data driver. In addition, the first control signal CONT1 may also include various appropriate types of control signals required to drive the first driver 210.

[0051] The second control signal CONT2 may include various appropriate types of control signals for controlling the second driver 220. For example, the second control signal CONT2 may include a second scan control signal (e.g., a second gate sampling pulse and a second gate sampling clock, etc.) for controlling the second scan driver and a second data control signal (e.g., a second source sampling pulse, a second source sampling clock, a second source output enable signal, etc.) for controlling the second data driver. In addition, the second control signal CONT2 may also include various appropriate types of control signals required to drive the second driver 220.

[0052] In addition, the controller 300 rearranges the input image data RGB supplied from the main processor or the like, and supplies it to the first driver 210 and the second driver 220. For example, depending on the state or driving mode of the display device 10, the controller 300 may determine the display panel to display the image corresponding to the input image data RGB among the first display panel 110 and the second display panel 120, rearrange the input image data RGB according to the determination, and supply the rearranged input image data RGB to the first driver 210 or the second driver 220. For example, when the display device 10 is driven in the unfolded state, the controller 300 may generate the first image data DATA1 by rearranging the input image data RGB, and supply the first image data DATA1 to the first driver 210. Accordingly, the respective first data signals DS1 corresponding to the first image data DATA1 may be supplied to the first pixels PX1. Similarly, when the display device 10 is driven in the folded state, the controller 300 may generate the second image data DATA2 by rearranging the input image data RGB, and supply the second image data DATA2 to the second driver 220. Accordingly, respective second data signals DS2 corresponding to the second image data DATA2 may be supplied to the second pixels PX2.

[0053] In an embodiment, the controller 300 may further include a compensator 310 configured to compensate for the characteristic variation of the first pixel PX1 and the second pixel PX2. For example, when the display device 10 compensates for the characteristic variation of the first pixel PX1 and the second pixel PX2 (the characteristic variation between the first pixels PX1, the characteristic variation between the second pixels PX2, and / or the characteristic variation between the first pixel PX1 and the second pixel PX2) in an external compensation manner using data compensation or the like, the controller 300 may further include a compensator 310 configured to generate the first image data DATA1 and the second image data DATA2 by changing the input image data RGB to compensate for the characteristic variation of the first pixel PX1 and the second pixel PX2.

[0054] Hereinafter, when a specific pixel is indicated among the first pixel PX1 and the second pixel PX2, or when a pixel of a specific display is indicated, the specific one or more pixels may be referred to as "first pixel PX1", "plurality of first pixels PX1", "second pixel PX2", or "plurality of second pixels PX2". In addition, when at least one pixel is indicated among the first pixel PX1 and the second pixel PX2, or when the first pixel PX1 and the second pixel PX2 are collectively indicated, the at least one pixel or the plurality of pixels may be referred to as "pixel PX" or "plurality of pixels PX".

[0055] The power component 400 is used to supply the operating power of the first display panel 110 and the second display panel 120, and may, for example, supply the first power ELVDD and the second power ELVSS to the first display DA1 and the second display DA2. Based on the emission period of each pixel PX, the first power ELVDD may be the high potential pixel power of the pixel PX, and the second power ELVSS may be the low potential pixel power of the pixel PX. For example, the first power ELVDD and the second power ELVSS may have a potential difference therebetween, which enables the pixel PX to emit light at least during the emission period of the corresponding pixel PX.

[0056] The power component 400 may generate the first power ELVDD and the second power ELVSS by using the input power, and supply the first power ELVDD and the second power ELVSS to the first display DA1 and the second display DA2. To this end, the power component 400 may include a first power source 410 for generating the first power ELVDD and supplying it to the first display DA1 and the second display DA2, and a second power source 420 for generating the second power ELVSS and supplying it to the first display DA1 and the second display DA2.

[0057] Figure 3 It is shown Figure 2 , and a block diagram of an embodiment of a respective display DA and a driver 200 for driving the respective display DA. For example, Figure 3 The display DA can be Figure 2 any one of the first display DA1 and the second display DA2, and Figure 3 The driver 200 may be Figure 2 Any one of the first driver 210 and the second driver 220. For example, Figure 3 The display DA and the driver 200 in the embodiment may be the first display DA1 and the first driver 210, respectively, or may be the second display DA2 and the second driver 220, respectively.

[0058] According to an embodiment, the size (area, etc.) and / or the number of pixels PX of the first display DA1 may be consistent with or different from the size (area, etc.) and / or the number of pixels PX of the second display DA2, and the configuration and / or arrangement of each pixel PX provided in the first display DA1 may be consistent with or different from the configuration and / or arrangement of each pixel PX provided in the second display DA2. Similarly, the first driver 210 and the second driver 220 may have the same structure or different structures. For example, the first pixel PX1 and the second pixel PX2 may have the same structure, and the first driver 210 and the second driver 220 may have the same structure and include respective sensors SSU (such as Figure 3 ).

[0059] Reference Figure 2 and Figure 3 , the display device 10 according to an embodiment of the present disclosure may include respective displays DA and respective drivers 200 for driving the displays DA. For example, when the display device 10 includes a first display DA1 and a second display DA2 that are driven individually or alternately, the display device 10 may include a first driver 210 for driving the first display DA1 and a second driver 220 for driving the second display DA2. According to an embodiment, the first driver 210 and the second driver 220 may be placed and / or configured separately, or may be placed and / or configured in such a manner that at least a portion thereof is integrated with each other.

[0060] Each of the displays DA includes scan lines S1 to Sn, control lines CL1 to CLn, data lines D1 to Dm, and a plurality of pixels PX coupled to the scan lines S1 to Sn, the control lines CL1 to CLn, and the data lines D1 to Dm. For example, the first display DA1 may include a plurality of first pixels PX1, each of which is coupled to any one of the scan lines, the control lines, and the data lines, and the second display DA2 may include a plurality of second pixels PX2, each of which is coupled to any one of the scan lines, the control lines, and the data lines. When describing the embodiments of the present disclosure, "coupled" may comprehensively mean "coupled" in physical and / or electrical terms.

[0061] Each of the pixels PX includes a light emitting element (e.g., an organic light emitting diode) and a pixel circuit for driving the light emitting element. Each of these pixels PX emits light having a brightness corresponding to a data signal of each frame during a display period. Accordingly, a set or predetermined image can be displayed in the display DA. Meanwhile, the pixels PX are connected to the sensing lines F1 to Fm during a sensing period, and the characteristics of the respective pixels PX are detected by the sensing lines F1 to Fm.

[0062] Each of the drivers 200 may include a scan driver SD, a control line driver CLD, a data driver DD, and a sensor SSU (or referred to as a "sensing circuit"). The scan driver SD, the control line driver CLD, the data driver DD, and / or the sensor SSU may be integrated into a single driver IC, or may be individually and / or separately arranged.

[0063] The scan driver SD supplies respective scan signals to the scan lines S1 to Sn during control by the controller 300. For example, the scan driver SD may sequentially supply the scan signals to the scan lines S1 to Sn during each frame period of the display period and the sensing period.

[0064] The control line driver CLD supplies respective control signals to the control lines CL1 to CLn during control by the controller 300. For example, the control line driver CLD may sequentially supply control signals to the control lines CL1 to CLn so as to select a single horizontal line during each frame period of the sensing period. At the same time, the control line driver CLD may supply control signals having a gate-off voltage to the control lines CL1 to CLn during the display period.

[0065] The data driver DD supplies respective data signals to the data lines D1 to Dm during control by the controller 300. For example, during a display period, the data driver DD is supplied with image data DATA converted by the controller 300, generates data signals corresponding to the image data DATA, and outputs the data signals to the data lines D1 to Dm. At the same time, the data driver DD may supply a set or predetermined reference voltage to the data lines D1 to Dm during a sensing period.

[0066] The sensor SSU senses characteristic information of the corresponding pixel PX through the sensing lines F1 to Fm during the sensing period while being controlled by the controller 300, and supplies the characteristic information to the controller 300 (e.g., the compensator 310). For example, the sensor SSU may sense degradation information of the light emitting element and / or characteristic information of the driving transistor of each of the pixels PX through the sensing lines F1 to Fm during each sensing period, and transmit the sensed information to the compensator 310. For example, the sensor SSU may sense a voltage of a second node of each of the pixels PX coupled to the sensing lines F1 to Fm through the sensing lines F1 to Fm during each sensing period, generate an output signal corresponding to the voltage of the second node, and transmit the output signal to the compensator 310.

[0067] The controller 300 controls the operations of the scan driver SD, the control line driver CLD, the data driver DD, and the sensor SSU by supplying respective control signals to the scan driver SD, the control line driver CLD, the data driver DD, and the sensor SSU. Also, the controller 300 converts the input image data RGB in response to the characteristic information of the pixel PX supplied by the sensor SSU, and supplies the converted image data DATA to the respective drivers 200. For example, the compensator 310 may convert the input image data RGB in response to the signal output from the sensor SSU to compensate for the characteristic variation of the pixel PX, and then may supply the converted image data DATA to the respective data drivers DD.

[0068] The first power source 410 supplies the first power ELVDD to the pixels PX of the respective displays DA. For example, the first power source 410 may supply the first power ELVDD of a fixed level (eg, a high level) to the pixels PX during a display period and a sensing period.

[0069] The second power source 420 supplies the second power ELVSS to the pixels PX of the respective displays DA. In an embodiment, the second power source 420 may supply the second power ELVSS of a first level (e.g., a ground level or a low level) to the pixels PX during the display period of each of the displays DA, and supply the second power ELVSS of a second level (e.g., a high level) to the pixels PX during the sensing period of each of the displays DA. In another embodiment, the second power source 420 may supply the second power ELVSS of a fixed level (e.g., a ground level or a low level) during the display period and the sensing period of each of the displays DA. That is, according to an embodiment, the display device 10 can be driven by changing the voltage level of the second power ELVSS.

[0070] Figure 4 2 is a circuit diagram showing a pixel PX according to an embodiment of the present disclosure, and shows that, for example, Figure 3 For example, Figure 4 The pixel PX may be a first pixel PX1 provided in the first display DA1 or a second pixel PX2 provided in the second display DA2. According to an embodiment, the first pixel PX1 and the second pixel PX2 may be configured to be identical to each other, but the configuration is not limited thereto. For convenience of description, Figure 4 A pixel PX is shown connected to each of the nth scan line (hereinafter referred to as "scan line Sn", n is a natural number), the nth control line (hereinafter referred to as "control line CLn"), the mth data line (hereinafter referred to as "data line Dm") and the mth sensing line (hereinafter referred to as "sensing line Fm") in the display DA.

[0071] Reference Figure 3 and Figure 4 According to an embodiment of the present disclosure, the pixel PX includes a light emitting element EL, first to third transistors M1 to M3, and a storage capacitor Cst. Figure 4 In the embodiment, each of the first transistor M1 to the third transistor M3 is shown as an N-type (N-channel) transistor, but its type may be appropriately changed according to the embodiment. For example, in another embodiment, at least one of the first transistor M1 to the third transistor M3 may be changed to a P-type (P-channel) transistor.

[0072] The light emitting element EL is connected between a power source of the first power ELVDD and a power source of the second power ELVSS. When a driving current is supplied from the first transistor M1, the light emitting element EL emits light having a brightness corresponding to the driving current. According to an embodiment, the light emitting element EL may be an organic light emitting diode (OLED) including an organic light emitting layer, but the light emitting element EL is not limited thereto. For example, in another embodiment, a very small inorganic light emitting element having a size of nanometer to micrometer may be a light source for each pixel PX.

[0073] The first transistor M1 is coupled between a power source of the first power ELVDD and the light emitting element EL, and a gate electrode thereof is coupled to the first node N1. The first transistor M1 controls a driving current supplied to the light emitting element EL in response to a voltage of the first node N1.

[0074] The second transistor M2 is coupled between the data line Dm and the first node N1, and its gate electrode is connected to the scan line Sn. When a scan signal having a gate-on voltage (e.g., a high voltage) is supplied to the scan line Sn, the second transistor M2 is turned on. Herein, the scan signal having a gate-on voltage may be supplied at least once in each frame period of the display period, and may be supplied at least once in the setting of the sensing period or a predetermined frame period (e.g., the setting of the characteristic information of the pixel PX of the corresponding horizontal line or a predetermined sensing frame period). Hereinafter, the "scan signal having a gate-on voltage" may also be referred to as a "scan signal". When the second transistor M2 is turned on, the voltage of the data line Dm (e.g., the voltage of the data signal or the reference voltage) is transmitted to the first node N1.

[0075] The third transistor M3 is coupled between the second node N2 and the sensing line Fm, and its gate electrode is coupled to the control line CLn. When a control signal having a gate-on voltage (e.g., a high voltage) is supplied to the control line CLn, the third transistor M3 is turned on. Here, the control signal having a gate-on voltage may be supplied during the setting of a sensing period or a predetermined frame period (e.g., the setting of characteristic information of the pixel PX of the corresponding horizontal line or a predetermined sensing frame period). Here, the "control signal having a gate-on voltage" may also be referred to as a "control signal". When the third transistor M3 is turned on, the second node N2 is coupled to the sensing line Fm.

[0076] In an embodiment, each of the first to third transistors M1 to M3 may be an N-type oxide thin film transistor (i.e., a thin film transistor whose active layer is an oxide semiconductor). In this case, more improved characteristics may be provided compared to those of a thin film transistor using amorphous silicon (a-Si) or polycrystalline silicon (Poly-Si), and unlike a low temperature polycrystalline silicon (LTPS) thin film transistor, a crystallization process for crystallizing the active layer is not required.

[0077] However, according to the embodiment, the type of each of the first to third transistors M1 to M3 may be appropriately changed. For example, in another embodiment, at least one of the first to third transistors M1 to M3 may be a P-type or N-type LTPS thin film transistor or any other type of transistor.

[0078] The storage capacitor Cst is coupled between one electrode of the first transistor M1 and the first node N1. For example, the storage capacitor Cst may be coupled between the first node N1 and the second node N2. The storage capacitor Cst is charged with a voltage corresponding to the voltage of the first node N1.

[0079] When a scan signal is supplied to the scan line Sn during each frame period of a display period, the above-mentioned pixel PX is supplied with a data signal from the data line Dm and emits light having brightness corresponding to the data signal.

[0080] Specifically, in each frame period of the display period (for example, a horizontal period in which a corresponding horizontal line is selected during the frame period), the pixel PX is supplied with a scan signal through the scan line Sn. Accordingly, the second transistor M2 is turned on. In addition, the data signal of each frame is supplied to the data line Dm of the pixel PX so as to be synchronized with the scan signal. Accordingly, when the second transistor M2 is turned on by the scan signal, the data signal of each frame is transmitted to the first node N1. Accordingly, the storage capacitor Cst is charged with a voltage corresponding to the data signal. When a data signal having a voltage capable of turning on the first transistor M1 is supplied to the first node N1, the first transistor M1 is turned on, whereby a driving current corresponding to the voltage of the first node N1 is supplied to the light emitting element EL. Accordingly, the light emitting element EL emits light having a brightness corresponding to the data signal.

[0081] Meanwhile, when the degradation information of the light emitting element EL is to be detected during one period of the display period, the control signal is supplied to the control line CLn during the corresponding period, whereby the third transistor M3 can be turned on. For example, when the degradation information of the light emitting element EL of the pixel PX is to be detected in any one horizontal line during each frame period of the display period, the control signal is supplied to the control line CLn coupled to the pixel PX during at least one period of the emission period of the pixel PX, whereby the third transistor M3 can be turned on. In this case, the voltage applied to the anode of the light emitting element EL in each of the pixels PX can be sensed through the sensing line Fm.

[0082] At the same time, during a set or predetermined sensing period that does not overlap with the display period, during a set or predetermined sensing frame period corresponding to the pixel PX, characteristic information of the pixel PX (e.g., information about the threshold voltage of the first transistor M1) can be sensed through the sensing line Fm. The process of sensing the characteristic information of the pixel PX during the sensing period will be described in more detail later.

[0083] Figure 5 It is shown Figure 3 , a block diagram of an embodiment of a data driver DD, a sensor SSU and a compensator 310 shown in FIG. Figure 4 The channel of the pixel PX, Figure 5 The configuration of the data driver DD and the sensor SSU is shown.

[0084] Reference Figures 3 to 5 The sensor SSU includes a first sensing switch SSW1 connected between each sensing line Fm and a source of a pre-charge voltage Vpre, a second sensing switch SSW2 connected between the sensing line Fm and the compensator 310, and an analog-to-digital converter (hereinafter referred to as “ADC”) connected between the second sensing switch SSW2 and the compensator 310.

[0085] During a first period of a sensing period in which characteristic information of the pixel PX is sensed via the sensing line Fm, the first sensing switch SSW1 is turned on.

[0086] During the second period of the sensing period, the second sensing switch SSW2 is turned on. The second sensing switch SSW2 is not turned on simultaneously or synchronously with the first sensing switch SSW1, and may be turned on after the turn-on period of the first sensing switch SSW1. That is, the second period may be a period after each first period.

[0087] At the same time, according to an embodiment, the second sensing switch SSW2 may be turned on during one period in the display period. For example, during the period when the pixels PX of a set or predetermined horizontal line emit light in response to the data signal in the display period, the control signal is supplied to the control line CLn connected to the pixels PX, and the second sensing switch SSW2 corresponding to each sensing line Fm may be turned on. In this case, the voltage of the second node N2 of the anode of the light emitting element EL of each of the pixels PX (hereinafter referred to as "anode voltage") is supplied to each analog-to-digital converter (ADC), whereby the anode voltage is sensed by the sensor SSU.

[0088] As the light emitting element EL gradually degrades, the resistance value of the light emitting element EL is changed, and the anode voltage is also changed. Therefore, degradation information related to the light emitting element EL can be extracted from the anode voltage. According to an embodiment, the anode voltage can be used to convert the input image data RGB so as to compensate for the change of each pixel PX.

[0089] The ADC converts the anode voltage of the light emitting element EL, which is supplied through the second sensing switch SSW2 during sensing of degradation information of the light emitting element EL in the display period, into a first digital value. In addition, the ADC converts a voltage corresponding to the threshold voltage of the first transistor M1, which is supplied through the second sensing switch SSW2 during sensing information about the threshold voltage of the first transistor M1 of each pixel PX, into a digital value (hereinafter referred to as a “second digital value”).

[0090] That is, the ADC senses the anode voltage of the light emitting element EL and / or the threshold voltage of the first transistor M1 through each sensing line Fm, converts them into first digital values ​​and / or second digital values, and outputs the first digital values ​​and / or second digital values.

[0091] The data driver DD includes a data signal generator DSG and a switch unit SWU connected between each output line Om of the data signal generator DSG and the corresponding data line Dm. Figure 5An embodiment in which the switch unit SWU is included in the data driver DD is shown, but the present disclosure is not limited thereto. For example, in another embodiment, the switch unit SWU may be arranged and / or placed to be separated from the data driver DD.

[0092] The data signal generator DSG includes a plurality of channels corresponding to the respective data lines D1 to Dm of the display DA and generates respective data signals in response to the image data DATA supplied from the compensator 310 .

[0093] The switch unit SWU includes a first data switch DSW1 coupled between the data signal generator DSG and the data line Dm, and a second data switch DSW2 coupled between the data line Dm and a source of a reference voltage Vref.

[0094] The first data switch DSW1 is coupled between an output line Om corresponding to each channel of the data signal generator DSG and a data line Dm corresponding to the output line Om. When each data signal generated in the data signal generator DSG is supplied to each pixel PX, the first data switch DSW1 is turned on. For example, during a display period in which each display DA displays a set or predetermined image, the first data switch DSW1 may maintain a turned-on state.

[0095] The second data switch DSW2 is turned on during one of the sensing periods in which the characteristic information of each pixel PX is sensed through each sensing line Fm. According to an embodiment, the sensing period may be a period in which information about the threshold voltage of the first transistor M1 in each pixel PX is sensed. For example, the second data switch DSW2 may be turned on during one of the sensing periods for sensing information about the threshold voltage of the first transistor M1 in each pixel PX.

[0096] The compensator 310 includes a lookup table (referred to as “LUT”) 311 , a control block 312 , a memory 313 , and a conversion circuit 314 .

[0097] The lookup table 311 stores reference values ​​of the voltage of the light emitting element EL relative to the current thereof. The reference values ​​are used to detect and compensate for degradation of the light emitting element EL, and the lookup table 311 may be omitted in an embodiment that does not compensate for degradation of the light emitting element EL.

[0098] The control block 312 extracts degradation information of the light emitting element EL corresponding to the first digital value provided from the sensor SSU by referring to the lookup table 311 and stores it in the memory 313. Furthermore, the control block 312 stores in the memory 313 the second digital value provided from the sensor SSU.

[0099] The memory 313 stores characteristic information detected from each pixel PX (e.g., degradation information of the light emitting element EL and / or information about the threshold voltage of the first transistor M1). For example, the memory 313 may store degradation information of the light emitting element EL corresponding to a first digital value converted from an anode voltage detected from each pixel PX, and the memory 313 may store a second digital value corresponding to the threshold voltage of the first transistor M1 of each pixel PX.

[0100] The conversion circuit 314 converts the input image data RGB by using the characteristic information of each pixel PX stored in the memory 313, and outputs the converted image data DATA to the data driver DD. For example, the conversion circuit 314 converts the input image data RGB by using the degradation information of the light emitting element EL and / or the information about the threshold voltage of the first transistor M1 to compensate for the degradation of the light emitting element EL and / or the change in the threshold voltage of the first transistor M1, and outputs the converted image data DATA (or referred to as "compensation data").

[0101] The image data DATA converted by the conversion circuit 314 is supplied to the data driver DD. Accordingly, the data driver DD generates respective data signals corresponding to the converted image data DATA, and supplies the respective data signals to the pixels PX through the respective data lines Dm. Accordingly, the display DA can display an image of uniform brightness regardless of characteristic variations of the pixels PX (e.g., degradation of the light emitting element EL and / or variations in the threshold voltage of the first transistor M1).

[0102] Figure 6 1 is a waveform diagram showing a driving method of the display device 10 according to an embodiment of the present disclosure, and shows, for example, a method for sensing characteristic information of each pixel PX during a sensing period SP. Figure 6 A method for sensing characteristic information of a pixel PX based on any pixel PX is shown in FIG. Figure 6 The sensing period SP in may be a period for sensing characteristic information of pixels PX of a horizontal line, and the corresponding pixels PX are located on the horizontal line.

[0103] Reference Figure 5 and Figure 6, during the sensing period SP, the voltage level of the second power ELVSS is increased to a set or predetermined high voltage ELVSS_H. For example, during a period other than the sensing period SP (for example, at least during the display period), the second power ELVSS may be supplied as a low voltage ELVSS_L (for example, a ground voltage), the voltage level of the low voltage ELVSS_L enables the light emitting element EL to emit light, and in the sensing period SP, the second power ELVSS may be supplied as a high voltage ELVSS_H, the voltage level of the high voltage ELVSS_H prevents or blocks the light emitting element EL from emitting light. According to an embodiment, the high voltage ELVSS_H of the second power ELVSS may have a voltage level equal to or higher than a voltage obtained by subtracting a threshold voltage of the light emitting element EL from a voltage (i.e., an anode voltage) applied to the anode of the light emitting element EL during the sensing period. For example, the high voltage ELVSS_H may be a voltage higher than a voltage applied to the anode of the light emitting element EL during the sensing period SP. Accordingly, the pixel PX may be prevented or blocked from emitting light during the sensing period SP.

[0104] During a first period P1 corresponding to an earlier period in the sensing period SP, a first switch control signal SWC1 capable of turning on the first sensing switch SSW1 is supplied to the first sensing switch SSW1. For example, during the first period P1, a first switch control signal SWC1 having a gate-on voltage (e.g., a high voltage) may be supplied to the first sensing switch SSW1. Hereinafter, "a first switch control signal SWC1 having a gate-on voltage" is referred to as "a first switch control signal SWC1".

[0105] Accordingly, during the first period P1, the first sensing switch SSW1 is turned on, and the precharge voltage Vpre is transmitted to the respective sensing lines Fm. Accordingly, the voltage V(Fm) of the sensing line Fm is initialized to the precharge voltage Vpre. The precharge voltage Vpre may be a voltage lower than the reference voltage Vref so that the difference therebetween is equal to or greater than the threshold voltage Vth of the first transistor M1. For example, the precharge voltage Vpre and the reference voltage Vref may be supplied so that the difference therebetween enables the first transistor M1 to be turned on during at least one period in the sensing period SP. In an embodiment, the precharge voltage Vpre may be a set or predetermined low voltage (e.g., a ground voltage), but the precharge voltage Vpre is not limited thereto. Moreover, the reference voltage Vref may be a voltage (e.g., a set or predetermined level of high voltage) that can turn on the first transistor M1 during each sensing period for detecting the characteristic information of the pixel PX.

[0106] According to an embodiment, in the remaining period excluding the first period P1, the first switch control signal SWC1 for turning off the first sensing switch SSW1 is supplied to the first sensing switch SSW1. For example, in the remaining period excluding the first period P1 from the sensing period SP, the first switch control signal SWC1 having a gate-off voltage (e.g., a low voltage) may be supplied to the first sensing switch SSW1. Accordingly, during the remaining period, the first sensing switch SSW1 may maintain an off state.

[0107] Meanwhile, during one period in the sensing period SP, the reference voltage Vref may be supplied to the data line Dm. The reference voltage Vref may have a voltage level capable of turning on the first transistor M1.

[0108] For example, during a set or predetermined time after the end of the first period P1, a switch control signal (referred to as a "data switch control signal") for turning on the second data switch DSW2 may be supplied to the second data switch DSW2. For example, during a set or predetermined time after the end of the first period P1, a switch control signal having a gate-on voltage (e.g., a high voltage) may be supplied to the second data switch DSW2. According to an embodiment, the second data switch DSW2 may maintain a turned-on state during a time sufficient to charge the respective data line Dm with the reference voltage Vref. Accordingly, the reference voltage Vref is transmitted to the data line Dm, whereby the voltage V(Dm) of the data line Dm may be changed to the reference voltage Vref.

[0109] In an embodiment, during the supply of the scan signal, the second data switch DSW2 may maintain a turned-on state during at least one period (e.g., an earlier period). Accordingly, during the sensing period SP, while the scan signal is being supplied to each pixel PX, the reference voltage Vref may be stably supplied to the pixel PX. In an embodiment, the second data switch DSW2 may be controlled by a control signal supplied from the controller 300 to the data driver DD.

[0110] At the same time, according to an embodiment, the data signal generator DSG itself may generate and / or supply a reference voltage Vref. For example, a set or predetermined grayscale voltage is set as the reference voltage Vref, and during at least one period of the sensing period SP, the data signal generator DSG may supply the reference voltage Vref to each data line Dm. In this case, the switch part SWU is omitted, and each output line Om of the data signal generator DSG may be directly connected to the corresponding data line Dm.

[0111] In the sensing period, during the second period P2 after the first period P1, the scan signal and the control signal are respectively supplied to the scan line Sn and the control line CLn. For example, the supply of the scan signal and the control signal may be started after a set or predetermined time after the reference voltage Vref is started to be supplied to the data line Dm. Accordingly, the second transistor M2 and the third transistor M3 are turned on.

[0112] When the second transistor M2 is turned on, the reference voltage Vref is transmitted to the first node N1, thereby the first transistor M1 is turned on. Here, the storage capacitor Cst is charged with a voltage capable of turning on the first transistor M1. At the same time, during the sensing period SP, the voltage of the second power ELVSS is maintained at the high voltage ELVSS_H, thereby even if the first transistor M1 is turned on, the light emitting element EL can maintain a non-emitting state.

[0113] When the third transistor M3 is turned on, the second node N2 is coupled to the sensing line Fm. Accordingly, the voltage of the second node N2 is transmitted to the sensing line Fm.

[0114] In an embodiment, in an earlier period (hereinafter referred to as "first sub-period P2_1") of the period in which the scan signal and the control signal are supplied, the first switch control signal SWC1 and the second switch control signal SWC2 (e.g., the first switch control signal SWC1 and the second switch control signal SWC2 having a gate-off voltage) for turning off the first sense switch SSW1 and the second sense switch SSW2 may be supplied to the first sense switch SSW1 and the second sense switch SSW2. Accordingly, during the first sub-period P2_1, the second node N2 may be floated.

[0115] After the sensing line Fm is charged with the precharge voltage Vpre, the sensing line Fm is coupled to the second node N2 through the third transistor M3, and the reference voltage Vref is supplied to the first node N1, whereby the first transistor M1 is turned on during the first sub-period P2_1. Accordingly, the voltage of the second node N2 increases steadily, and when the voltage of the second node N2 becomes lower than the reference voltage Vref by the threshold voltage Vth of the first transistor M1, the first transistor M1 is turned off. That is, during the first sub-period P2_1, the first transistor M1 is turned on, and then after the voltage difference between its gate electrode and source electrode becomes equal to the threshold voltage Vth, the first transistor M1 may be turned off. Accordingly, during the first sub-period P2_1, the voltage V(Fm) of the sensing line Fm changes from the precharge voltage Vpre to a voltage (Vref-Vth) that reduces the threshold voltage Vth of the first transistor M1 from the reference voltage Vref. After the first transistor M1 is turned off, the voltage of the second node N2 is maintained at a voltage (Vref-Vth) reduced from the reference voltage Vref by the threshold voltage Vth of the first transistor M1.

[0116] In the second period P2, during the second sub-period P2_2 after the first sub-period P2_1, a second switch control signal SWC2 for turning on the second sensing switch SSW2 (e.g., a second switch control signal SWC2 having a gate-on voltage (e.g., a high level), hereinafter referred to as "the second switch control signal SWC2") may be supplied to the second sensing switch SSW2. Accordingly, the second sensing switch SSW2 is turned on, whereby during the second sub-period P2_2, the sensing line Fm is coupled to the ADC corresponding to each channel of the sensor SSU. Accordingly, the voltage of the second node N2 (i.e., the voltage (Vref-Vth) corresponding to the difference between the reference voltage Vref and the threshold voltage Vth of the first transistor M1) is transmitted to the ADC, whereby information about the threshold voltage Vth of the first transistor M1 may be detected. Moreover, the mobility characteristics of the first transistor M1 may be detected in the same manner.

[0117] At the same time, according to the embodiment, the conduction period of the second sensing switch SSW2 may be appropriately changed. For example, in another embodiment, during the first period P1, after the first sensing switch SSW1 supplies the precharge voltage Vpre to the sensing line Fm, the first sensing switch SSW1 is turned off, and immediately after the first sensing switch SSW1 is turned off (i.e., immediately after the end of the first period P1), the second sensing switch SSW2 may be turned on by supplying the second switch control signal SWC2. During the second period P2, the second sensing switch SSW2 may remain in the on state. In this case, sufficient time for charging the ADC with the voltage applied to the sensing line Fm may be ensured.

[0118] In an embodiment, when the voltages of the scan signal and the control signal are changed to the gate-off voltage, the voltage of the second switch control signal SWC2 may also be changed to the gate-off voltage. However, as long as the turn-on period of the third transistor M3 overlaps the turn-on period of the second sensing switch SSW2, the time for supplying the second switch control signal SWC2 may be appropriately changed.

[0119] The ADC converts the characteristic information of the first transistor M1 (information about the threshold voltage Vth, etc.) into a second digital value, and outputs the second digital value to the control block 312. Then, the control block 312 stores the second digital value in the memory 313. When the conversion circuit 314 converts the input image data RGB, the characteristic information of the first transistor M1 stored in the memory 313 may be used. For example, the characteristic information of the first transistor M1 may be used to compensate for the characteristic variation of the pixel PX by converting the input image data RGB.

[0120] According to the above-described embodiment, characteristic information of the pixel PX (e.g., information about the threshold voltage Vth or the like of the first transistor M1) is sensed during the sensing period SP, and the sensed information can be used for data compensation. For example, the input image data RGB may be converted to compensate for the variation in the threshold voltage Vth of the first transistor M1 provided in the pixel PX, and the converted image data DATA may be output to the data driver DD. Then, during each display period, the data driver DD supplies a data signal corresponding to the converted image data DATA to the pixel PX. Accordingly, characteristic variations between the pixels PX are compensated, and an image with uniform quality may be displayed in each display DA.

[0121] Also, according to the above embodiment, during the sensing period SP, the voltage of the second power ELVSS can be maintained at a high voltage ELVSS_H that prevents or blocks each light emitting element EL from emitting light. Accordingly, the pixel PX can be prevented or blocked from unintentionally emitting light during the sensing period SP.

[0122] Figure 7 1 is a block diagram showing a display device 10 according to an embodiment of the present disclosure, and shows, for example, Figure 2 400 is shown in FIG. Figure 7 When describing an embodiment of the present invention, the same or similar elements in the above-mentioned embodiment are denoted by the same reference numerals, and a detailed description thereof will be omitted.

[0123] Reference Figures 2 to 7 , the power component 400 according to an embodiment of the present disclosure may include a first power source 410 for supplying a first power ELVDD and a second power source 420 for supplying a second power ELVSS.

[0124] During the display period and the sensing period SP of the display DA, the first power source 410 may supply the first power ELVDD having a fixed voltage to each display DA. For example, the first power source 410 has a high voltage source VH for generating the first power ELVDD having a high voltage, the level of the first power ELVDD having a high voltage is set so that the pixel PX can emit light during the corresponding display period, and the first power source 410 may supply the first power ELVDD having a high voltage to the respective displays DA.

[0125] The second power source 420 may supply the second power ELVSS having different voltages according to the display period and the sensing period SP of each display DA. For example, the second power source 420 may supply the second power ELVSS having a low voltage ELVSS_L that enables the pixel PX to emit light to each display DA during the display period of the display DA, and supply the second power ELVSS having a high voltage ELVSS_H that prevents or blocks the pixel PX from emitting light to each display DA during the sensing period SP of the display DA.

[0126] According to an embodiment, the second power source 420 may include a plurality of voltage sources. For example, the second power source 420 may include a first voltage source V1 for generating a set or predetermined low voltage ELVSS_L (or referred to as a "first voltage") and a second voltage source V2 for generating a set or predetermined high voltage ELVSS_H (or referred to as a "second voltage"). That is, the first voltage source V1 may generate a second power ELVSS having a low voltage ELVSS_L, and the second voltage source V2 may generate a second power ELVSS having a high voltage ELVSS_H. The low voltage ELVSS_L of the first voltage source V1 may have a voltage level that enables the first pixel PX1 and the second pixel PX2 to emit light, and the high voltage ELVSS_H of the second voltage source V2 may have a voltage level that prevents or blocks the first pixel PX1 and the second pixel PX2 from emitting light.

[0127] In addition, the second power supply 420 may further include a first power switch PSW1 and a second power switch PSW2, each of which is connected between any one of the displays DA and the first voltage source V1 and the second voltage source V2. For example, the second power supply 420 may include a first power switch PSW1 (or referred to as a "first switch") connected between the first display DA1 and the first voltage source V1 and the second voltage source V2, and a second power switch PSW2 (or referred to as a "second switch") connected between the second display DA2 and the first voltage source V1 and the second voltage source V2.

[0128] The first power switch PSW1 may couple the first display DA1 to either the first voltage source V1 or the second voltage source V2 according to a driving mode of the first display DA1 (e.g., a display mode corresponding to a display period or a sensing mode corresponding to a sensing period SP). For example, the first power switch PSW1 may be configured as a three-port switch that selectively couples the first display DA1 to the first voltage source V1 or the second voltage source V2, depending on whether the first display DA1 is activated (e.g., whether the first display DA1 is driven in a display mode).

[0129] During each display period in which the first display DA1 is driven in the display mode, the first power switch PSW1 may couple the first display DA1 to the first voltage source V1. For example, during the display period of the first display DA1, the first power switch PSW1 may couple an output port (hereinafter referred to as "first output port P(O1)") coupled to the second power terminal (or second power pad) of the first display DA1 to a first input port P(A) coupled to the first voltage source V1. Accordingly, during the display period, the first display DA1 may be supplied with the second power ELVSS having the low voltage ELVSS_L.

[0130] During each sensing period SP when the first display DA1 is driven in the sensing mode, the first power switch PSW1 may couple the first display DA1 to the second voltage source V2. For example, during the sensing period of the first display DA1, the first power switch PSW1 may couple the first output port P(O1) to the second input port P(B) coupled to the second voltage source V2. Accordingly, during the sensing period SP, the first display DA1 may be supplied with the second power ELVSS having the high voltage ELVSS_H.

[0131] The second power switch PSW2 may connect the second display DA2 to either the first voltage source V1 or the second voltage source V2 according to a driving mode of the second display DA2 (e.g., a display mode corresponding to the display period or a sensing mode corresponding to the sensing period SP). For example, depending on whether the second display DA2 is activated (e.g., whether the second display DA2 is driven in the display mode), the second power switch PSW2 may be configured as a three-port switch that selectively connects the second display DA2 to the first voltage source V1 or the second voltage source V2.

[0132] According to an embodiment, during each display period in which the second display DA2 is driven in the display mode, the second power switch PSW2 may couple the second display DA2 to the first voltage source V1. For example, during the display period of the second display DA2, the second power switch PSW2 may couple an output port (hereinafter referred to as "second output port P(O2)") coupled to the second power terminal (or second power pad) of the second display DA2 to a first input port P(A) coupled to the first voltage source V1. Accordingly, during the display period, the second display DA2 may be supplied with the second power ELVSS having the low voltage ELVSS_L.

[0133] During each sensing period SP when the second display DA2 is driven in the sensing mode, the second power switch PSW2 may couple the second display DA2 to the second voltage source V2. For example, during the sensing period of the second display DA2, the second power switch PSW2 may couple the second output port P(O2) to the second input port P(B) coupled to the second voltage source V2. Accordingly, during the sensing period SP, the second display DA2 may be supplied with the second power ELVSS having the high voltage ELVSS_H.

[0134] Figure 8 is a waveform diagram showing a method of driving the display device 10 according to an embodiment of the present disclosure, and shows, for example, Figure 7 The method in which the second power source 420 supplies the second power ELVSS is shown in FIG.

[0135] Reference Figure 7 and Figure 8 , each of the first display DA1 and the second display DA2 may be driven in a display mode or a sensing mode. Each of the first display DA1 and the second display DA2 may be supplied with the second power ELVSS having a low voltage ELVSS_L during a display period in which the display is driven in the display mode, and may be supplied with the second power ELVSS having a high voltage ELVSS_H during a sensing period SP in which the display is driven in the sensing mode.

[0136] For example, the controller 300 may supply the first image data DATA1 to the first driver 210 in response to a period in which the first display DA1 displays an image (i.e., a display period of the first display DA1). Accordingly, the first driver 210 drives the first pixel PX1 by generating a driving signal corresponding to the first image data DATA1, whereby an image corresponding to the first image data DATA1 may be displayed in the first display DA1.

[0137] In addition, the controller 300 may supply the second image data DATA2 to the second driver 220 in response to a period in which the second display DA2 displays an image (i.e., a display period of the second display DA2). Accordingly, the second driver 220 drives the second pixel PX2 by generating a driving signal corresponding to the second image data DATA2, whereby an image corresponding to the second image data DATA2 may be displayed in the second display DA2.

[0138] According to an embodiment, the first display DA1 and the second display DA2 may display images at different times. For example, during the driving of the first display DA1 in the display mode, the second display DA2 may be driven in the non-display mode or the sensing mode, and during the driving of the second display DA2 in the display mode, the first display DA1 may be driven in the non-display mode or the sensing mode. For example, during the driving of the second display DA2 in the display mode, the first display DA1 may be driven in the sensing mode, and during the driving of the first display DA1 in the display mode, the second display DA2 may be driven in the sensing mode.

[0139] That is, according to an embodiment, the first display DA1 and the second display DA2 may display images at different times. Figure 1A When expanded as shown in , the first display DA1 can display an image corresponding to the first image data DATA1. Figure 1B When folded as shown in FIG. 1 , the second display DA2 may display an image corresponding to the second image data DATA2.

[0140] In an embodiment, at a switching time of the display DA (i.e., when the display DA displaying an image is switched during the display device 10 is being driven), a period of supplying the first image data DATA1 and a period of supplying the second image data DATA2 (or a period of supplying a command indicating the end of a display mode of one display DA and a period of supplying a command indicating the start of a display mode of another display DA) may overlap with each other. For example, at a switching time when the display mode of the second display DA2 ends and the display mode of the first display DA1 starts, a period of supplying the first image data DATA1 may partially overlap with a period of supplying the second image data DATA2. In this case, after the first display DA1 is switched to the "on" state, the second display DA2 may be switched to the "off" state. Accordingly, the display device 10 may display images consistently.

[0141] The first power source 410 may supply the first power ELVDD having a fixed voltage to each of the displays DA during driving the display device 10. For example, the first power source 410 may supply the first power ELVDD having a fixed voltage to the first display DA1 during a display period and a sensing period SP of the first display DA1, and may supply the first power ELVDD having a fixed voltage to the second display DA2 during a display period and a sensing period SP of the second display DA2.

[0142] Meanwhile, during driving of the display device 10, the second power source 420 may change and supply a voltage level of the second power ELVSS to be supplied to each display DA according to the driving mode of the display DA. For example, the first power switch PSW1 may couple the first display DA1 to the first voltage source V1 during driving of the first display DA1 in the display mode, and may couple the first display DA1 to the second voltage source V2 during driving of the first display DA1 in the sensing mode. Similarly, the second power switch PSW2 may couple the second display DA2 to the first voltage source V1 during driving of the second display DA2 in the display mode, and may couple the second display DA2 to the second voltage source V2 during driving of the second display DA2 in the sensing mode.

[0143] In view of this, the first power switch PSW1 couples the first output port P(O1) to the first input port P(A) during driving the first display DA1 in the display mode, thereby coupling the first display DA1 to the first voltage source V1. Accordingly, the first display DA1 can be supplied with the second power ELVSS having the low voltage ELVSS_L during each display period.

[0144] In addition, the first power switch PSW1 couples the first output port P(O1) to the second input port P(B) during driving the first display DA1 in the sensing mode, thereby coupling the first display DA1 to the second voltage source V2. Accordingly, the first display DA1 may be supplied with the second power ELVSS having the high voltage ELVSS_H during each sensing period SP.

[0145] Similarly, the second power switch PSW2 couples the second output port P(O2) to the first input port P(A) during driving the second display DA2 in the display mode, thereby coupling the second display DA2 to the first voltage source V1. Accordingly, the second display DA2 can be supplied with the second power ELVSS having the low voltage ELVSS_L during each display period.

[0146] In addition, the second power switch PSW2 couples the second output port P(O2) to the second input port P(B) during driving the second display DA2 in the sensing mode, thereby coupling the second display DA2 to the second voltage source V2. Accordingly, the second display DA2 may be supplied with the second power ELVSS having the high voltage ELVSS_H during each sensing period SP.

[0147] According to an embodiment, the time when the input port coupled to each of the first output port P(O1) and the second output port P(O2) coupled to the first power switch PSW1 and the second power switch PSW2 is switched may be the time when the display DA is switched. At the switching time, the first image data DATA1 and the second image data DATA2 may overlap each other.

[0148] at the same time, Figure 8 The timing of driving the first power switch PSW1 and the timing of driving the second power switch PSW2 are shown with different waveforms to show that the first power switch PSW1 and the second power switch PSW2 connect the first output port P(O1) and the second output port P(O2) to different input ports at a specific time. However, the waveform of the switch control signal (or referred to as "power switch control signal") input to the first power switch PSW1 and the second power switch PSW2 can be appropriately changed according to the structure and / or type of the first power switch PSW1 and the second power switch PSW2.

[0149] Schematically describe the Figure 7 and Figure 8 In the driving method of the display device 10 of the embodiment, first, during the period when the first operating power set to enable the pixel PX in the display DA to emit light is supplied to the corresponding display DA, any one of the first display DA1 and the second display DA2 may display an image. According to the embodiment, the first operating power may include a first power ELVDD having a fixed high voltage and a second power ELVSS having a low voltage ELVSS_L set to a set or predetermined level.

[0150] In addition, during at least one period during which the corresponding display DA displays an image, characteristic information of the pixel PX in the other display DA can be detected by supplying a second operating power thereto, the second operating power being set to prevent or block the pixel PX in the other display DA from emitting light. According to an embodiment, the second operating power may include a first power ELVDD having a fixed high voltage and a second power ELVSS having a high voltage ELVSS_H set to a set or predetermined level. The second power ELVSS having the high voltage ELVSS_H may have a potential that is the same as or different from that of the first power ELVDD.

[0151] For example, during one period of the driving period of the display device 10, the first display DA1 may display an image by supplying a first operating power configured to enable the first pixel PX1 to emit light to the first display DA1. In addition, during at least one period during which the first display DA1 displays an image, characteristic information of the second pixel PX2 may be detected by supplying a second operating power configured to prevent or block the second pixel PX2 from emitting light to the second display DA2. Here, during the detection of the characteristic information of the second pixel PX2, the first display DA1 may be connected to the first voltage source V1 of the second power supply 420, and the second display DA2 may be connected to the second voltage source V2 of the second power supply 420.

[0152] In addition, during another period of the driving period of the display device 10, the second display DA2 may display an image by supplying the first operating power configured to enable the second pixel PX2 to emit light to the second display DA2. In addition, during at least one period during which the second display DA2 displays an image, characteristic information of the first pixel PX1 may be detected by supplying the second operating power configured to prevent or block the first pixel PX1 from emitting light to the first display DA1. Here, during the detection of the characteristic information of the first pixel PX1, the first display DA1 may be connected to the second voltage source V2 of the second power supply 420, and the second display DA2 may be connected to the first voltage source V1 of the second power supply 420.

[0153] according to Figure 7 and Figure 8 In an embodiment, a display device 10 including a first display DA1 and a second display DA2 driven at different times is configured so that a second power ELVSS having a high voltage ELVSS_H that prevents or blocks the light emitting element EL from emitting light is supplied in response to a sensing period SP of each of the displays DA. Accordingly, the light emitting element EL of the pixel PX driven in the sensing mode is prevented or blocked from emitting light, and characteristic information of the pixel PX can be detected.

[0154] In addition, according to the above-described embodiment, when the voltage of the second power ELVSS is changed and supplied depending on the driving mode of each of the first display DA1 and the second display DA2, the first display DA1 and the second display DA2 share a single second power source 420. For example, a first voltage source V1 and a second voltage source V2 generating voltages of different levels are provided in the second power source 420, whereby the second power source 420 may be configured to generate a set or predetermined low voltage ELVSS_L and a set or predetermined high voltage ELVSS_H.

[0155] As described above, when the single second power source 420 is formed to generate the second power ELVSS having two different levels of voltage, the circuit structure of the power part 400 can be simplified, and power consumption can be reduced. For example, according to the above embodiment, compared with the case where an independent second power source 420 is configured for each display DA and each of the displays DA is driven by changing the voltage level of the second power ELVSS according to the driving mode of the display DA, the circuit structure of the second power source 420 can be simplified, and power consumption (e.g., static power consumption and / or transition power consumption) can be reduced.

[0156] Fig. 9 1 is a block diagram showing a display device 10 ′ according to an embodiment of the present disclosure, and shows, for example, Figure 2 Another embodiment related to the power component 400 shown in FIG. Fig.10 It shows that according to Fig. 9 1 ' is a waveform diagram of a driving method of a display device 10' according to an embodiment of the present invention, and shows an embodiment of a method for sensing characteristic information of each pixel PX during a sensing period SP, for example. Fig. 9 and Fig.10 When describing an embodiment of the present invention, the same or similar elements in the above-mentioned embodiment are denoted by the same reference numerals, and a detailed description thereof will be omitted.

[0157] Reference Fig. 9 and Fig.10 as well as Figures 2 to 5 , during the display period and the sensing period of each display DA, the second power source 420' may supply the second power ELVSS having a fixed voltage to the display DA. For example, the second power source 420' includes a single low voltage source VL, wherein the single low voltage source VL generates the second power ELVSS having a low voltage ELVSS_L set to a level at which the pixel PX may emit light during the display period, and the second power source 420' may supply the second power ELVSS having the low voltage ELVSS_L to each display DA regardless of its driving mode. In this case, the first display DA1 and the second display DA2 may share the second power source 420' having the single low voltage source VL.

[0158] However, in the present embodiment, during each sensing period SP, a negative level reference voltage -Vref is supplied to the data line Dm. For example, the reference voltage Vref may be a set or predetermined negative voltage set to a level lower than 0V. Hereinafter, the negative level reference voltage -Vref according to the present embodiment is referred to as "negative reference voltage -Vref" so as to compare it with the negative reference voltage -Vref in the above-mentioned embodiments (for example, Figures 6 to 8 In the embodiment of the present invention, the reference voltage Vref supplied during each sensing period is distinguished. In addition, Figures 6 to 8The first transistor M1 in the embodiment of the present invention has a threshold voltage Vth of a positive level, but the first transistor M1 in the present embodiment may have a threshold voltage -Vth of a negative level. Therefore, the negative threshold voltage -Vth of the first transistor M1 according to the present embodiment is represented by adding a minus sign thereto so as to compare it with Figures 6 to 8 The threshold voltage Vth of the first transistor M1 in the embodiment is distinguished.

[0159] In this embodiment, the voltage of the second power ELVSS can be maintained at a fixed voltage level, the structure of the power component 400 can be further simplified, and the pixel PX whose characteristic information is to be detected during each sensing period SP can be prevented or blocked from emitting light by supplying a negative reference voltage -Vref thereto. For example, the negative reference voltage -Vref can be set so that the anode voltage of each pixel PX during its sensing period SP is equal to or lower than the low voltage ELVSS_L of the second power ELVSS. Accordingly, the pixel PX can be prevented or blocked from emitting light during the sensing period SP.

[0160] According to an embodiment, the display device 10' may detect feature information of the second pixel PX2 during at least one period during which the first display DA1 displays an image, and may detect feature information of the first pixel PX1 during at least one period during which the second display DA2 displays an image. For example, during at least one period of the display period of the first display DA1, feature information of the second pixel PX2 arranged on at least one horizontal line of the second display DA2 may be detected, and during at least one period of the display period of the second display DA2, feature information of the first pixel PX1 arranged on at least one horizontal line of the first display DA1 may be detected.

[0161] During the first period P1 of each sensing period SP, the first sensing switch SSW1 is turned on by supplying the first switch control signal SWC1. Accordingly, the precharge voltage Vpre is transmitted to each sensing line Fm, whereby the voltage V(Fm) of the sensing line Fm is initialized to the precharge voltage Vpre. The precharge voltage Vpre may be a voltage that is lower than the negative reference voltage -Vref by a threshold voltage -Vth of the first transistor M1 or more. For example, the precharge voltage Vpre and the negative reference voltage -Vref may be supplied so that the difference between them causes the first transistor M1 to be turned on during at least one period in the sensing period SP. At the same time, during the remaining period except the first period P1 in each sensing period SP, the first sensing switch SSW1 may be turned off.

[0162] After the first period P1 ends, the negative reference voltage -Vref is supplied to the data line Dm. Accordingly, the voltage V(Dm) of the data line Dm may be changed to the negative reference voltage -Vref.

[0163] During the second period P2 after the first period P1 in the sensing period SP, the scan signal and the control signal are respectively supplied to the scan line Sn and the control line CLn. For example, after a set or predetermined time after the negative reference voltage -Vref starts to be supplied to the data line Dm, the supply of the scan signal and the control signal may be started. Accordingly, the second transistor M2 and the third transistor M3 are turned on.

[0164] When the second transistor M2 is turned on, the negative reference voltage -Vref is transmitted to the first node N1, whereby the first transistor M1 is turned on. Accordingly, the voltage of the second node N2 may gradually change to a voltage corresponding to the difference between the negative reference voltage -Vref and the threshold voltage -Vth of the first transistor M1 (-Vref-(-Vth), i.e., -Vref+Vth). Here, the storage capacitor Cst may be charged with a voltage corresponding to the threshold voltage -Vth of the first transistor M1. According to an embodiment, the voltage of the second node N2 (e.g., -Vref+Vth) may be equal to or less than the low voltage ELVSS_L of the second power ELVSS, and therefore, the light emitting element EL remains in a non-emitting state.

[0165] When the third transistor M3 is turned on, the second node N2 is coupled to the sensing line Fm. Accordingly, the voltage of the second node N2 is transmitted to the sensing line Fm.

[0166] According to an embodiment, during the first sub-period P2_1, the first and second switch control signals SWC1 and SWC2 for turning off the first and second sense switches SSW1 and SSW2 may be supplied. Accordingly, during the first sub-period P2_1, the second node N2 may be floated.

[0167] After the sensing line Fm is charged with the precharge voltage Vpre, because the sensing line Fm is coupled to the second node N2 through the third transistor M3, and because the negative reference voltage -Vref is supplied to the first node N1, the first transistor M1 is turned on during the first sub-period P2_1. Accordingly, the voltage of the second node N2 increases steadily, and when the voltage difference between the gate electrode and the source electrode of the first transistor M1 becomes the threshold voltage -Vth of the first transistor M1, the first transistor M1 is turned off. Accordingly, the storage capacitor Cst may be charged with a voltage corresponding to the threshold voltage -Vth of the first transistor M1.

[0168] During the second sub-period P2_2, the second sensing switch SSW2 is turned on by the second switch control signal SWC2, whereby each sensing line Fm is coupled to the ADC of the corresponding channel of the sensor SSU. Accordingly, information about the threshold voltage -Vth of the first transistor M1 can be detected.

[0169] In an embodiment, when the voltages of the scan signal and the control signal are changed to the gate-off voltage, the voltage of the second switch control signal SWC2 may also be changed to the gate-off voltage. However, as long as the turn-on period of the third transistor M3 and the turn-on period of the second sensing switch SSW2 overlap each other, the time for supplying the second switch control signal SWC2 may be appropriately changed.

[0170] The ADC converts characteristic information of the first transistor M1 (information about the threshold voltage -Vth, etc.) into a second digital value and supplies the second digital value to the compensator 310. The characteristic information of the first transistor M1 can be used to compensate for characteristic variations of the pixel PX, etc. by converting the input image data RGB.

[0171] Schematically describe the Fig. 9 and Fig.10 In the driving method of the display device 10' according to the embodiment, during the period when any one of the first display DA1 and the second display DA2 displays an image, characteristic information of the pixel PX of the other display DA is detected. For example, during at least one period of each display period in which an image is displayed in the first display DA1 by driving the first display DA1 in the display mode, characteristic information of the second pixel PX2 of at least one horizontal line in the second display DA2 may be detected.

[0172] According to an embodiment, detecting the characteristic information of the second pixel PX2 may include: supplying a precharge voltage Vpre of a set or predetermined voltage (hereinafter referred to as a "first low voltage") to the sensing lines F1 to Fm coupled to the second pixel PX2; supplying a negative reference voltage -Vref of the second low voltage to the sensing lines F1 to Fm; and detecting the characteristic information of the second pixel PX2 by coupling the sensing lines F1 to Fm to the sensor SSU. The second low voltage is set to be higher than the first low voltage, but may be set to a voltage that may prevent or block the second pixel PX2 from emitting light during the sensing period SP.

[0173] In addition, the first display DA1 and the second display DA2 may be supplied with the same operating power. For example, during driving the first display DA1 in the display mode and driving the second display DA2 in the sensing mode, the first power ELVDD and the second power ELVSS are supplied to all of the first display DA1 and the second display DA2, and the first power ELVDD and the second power ELVSS have a potential difference therebetween, and the potential difference enables the first pixel PX1 and the second pixel PX2 to emit light. According to an embodiment, the second low voltage corresponding to the negative reference voltage -Vref may be set to a voltage lower than each of the first power ELVDD and the second power ELVSS. Accordingly, the pixel PX driven in the sensing mode may be prevented or blocked from emitting light.

[0174] In the above-described embodiment, characteristic information of the pixel PX (e.g., information about the threshold voltage -Vth of the first transistor M1, etc.) can be sensed during the sensing period SP, and the information can be used for data compensation. Accordingly, characteristic variations between pixels PX can be compensated, and each display DA can display an image with uniform quality.

[0175] Furthermore, during the sensing period SP for detecting characteristic information of each pixel PX, the negative reference voltage -Vref is supplied to the pixel PX, thereby preventing or blocking the pixel PX from emitting light during the sensing period SP.

[0176] According to the display device 10 or the display device 10' and the driving method thereof according to the above-described embodiment, the display device 10 or the display device 10' having a plurality of displays DA (e.g., the first display DA1 and the second display DA2) is configured to compensate for the characteristic variation of the pixel PX, etc., by a data compensation method, thereby simplifying the structure of each pixel PX and improving the image quality. In addition, during each sensing period SP for detecting the characteristic information of the pixel PX, the pixel PX driven in the sensing mode can be effectively prevented or blocked from emitting light, the circuit structure of the power component 400 can be simplified, and the power consumption can be reduced.

[0177] Meanwhile, in the above-mentioned embodiment, an embodiment is disclosed in which, for each of the first display DA1 and the second display DA2, a characteristic variation of the first pixel PX1 or the second pixel PX2 is compensated by an external compensation method (e.g., a data conversion method), but the present disclosure is not limited thereto. For example, in another embodiment, only for any one of the first display DA1 and the second display DA2, a characteristic variation of the first pixel PX1 or the second pixel PX2 may be compensated by an external compensation method. In this case, only one power switch may be provided among the first power switch PSW1 and the second power switch PSW2 to be connected to the corresponding display DA.

[0178] It will be understood that although the terms "first", "second", "third", etc. may be used herein to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, the first element, component, region, layer or part discussed in this article may be referred to as a second element, component, region, layer or part without departing from the spirit and scope of the present inventive concept.

[0179] For ease of description, spatially relative terms such as "beneath", "below", "lower", "under", "above", and "upper" may be used herein to describe the relationship of one element or feature to another element or feature as shown in the figure. It will be understood that such spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientations depicted in the accompanying drawings. For example, if the device in the figure is turned over, the element described as being "below", "beneath", or "under" other elements or features will subsequently be oriented to be "above" the other elements or features. Therefore, the exemplary terms "below" and "under" may include both the orientation of the upper and the orientation of the lower. The device can be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein should be understood accordingly. In addition, it will also be understood that when a layer is referred to as being 'between' two layers, it can be the only layer between the two layers, or one or more intervening layers may also be present.

[0180] The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the inventive concept. As used herein, the terms "substantially," "about," and the like are used as terms of approximation rather than terms of degree, and are intended to account for the inherent deviations in measurements or calculations that one of ordinary skill in the art would recognize.

[0181] As used herein, the singular forms "a" and "an" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will also be understood that the terms "comprise" and / or "comprising", when used in this specification, specify the presence of stated features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or clusters thereof. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. Expressions such as "at least one", when preceding a list of elements, modify the entire list of elements and do not modify the individual elements of the list. In addition, the use of "may", when describing an embodiment of the inventive concept, refers to "one or more embodiments of the present disclosure". Furthermore, the term "exemplary" is intended to indicate an instance or example. As used herein, the terms "use," "using," and "used" may be considered synonymous with the terms "utilize," "utilizing," and "utilized," respectively.

[0182] It will be understood that when an element or layer is referred to as being “on,” “connected to,” “coupled to,” or “adjacent to” another element or layer, the element or layer may be directly on, directly connected to, coupled to, or adjacent to another element or layer, or one or more intervening elements or layers may be present. In contrast, when an element or layer is referred to as being “directly on,” “directly connected to,” “directly coupled to,” or “immediately adjacent to” another element or layer, there are no intervening elements or layers.

[0183] Any numerical range listed herein is intended to include all subranges of the same numerical precision within the listed range. For example, the range of "1.0 to 10.0" is intended to include all subranges between the listed minimum value of 1.0 and the listed maximum value of 10.0 (and including the listed minimum value of 1.0 and the listed maximum value of 10.0), that is, all subranges with a minimum value greater than or equal to 1.0 and a maximum value less than or equal to 10.0, for example, 2.4 to 7.6. Any maximum numerical limit listed herein is intended to include all lower numerical limits included therein, and any minimum numerical limit listed in this specification is intended to include all larger numerical limits included therein.

[0184] In some embodiments, one or more outputs of different embodiments of the methods and systems of the present disclosure may be transmitted to an electronic device connected to or having a display device, which is used to display the one or more outputs, or information about the one or more outputs of different embodiments of the methods and systems of the present disclosure.

[0185] The electronic or electrical devices and / or any other related devices or components according to the embodiments of the present disclosure described herein can be implemented by utilizing any suitable hardware, firmware (e.g., application specific integrated circuits), software, or a combination of software, firmware, and hardware. For example, the various components of these devices can be formed on an integrated circuit (IC) chip or on an independent IC chip. In addition, the various components of these devices can be implemented on a flexible printed circuit film, a tape carrier package (TCP), a printed circuit board (PCB), or formed on a substrate. In addition, the various components of these devices can be processes or threads, which run on one or more processors, run in one or more computer devices, execute computer program instructions, and interact with other system components, which are used to perform the various functions described herein. The computer program instructions are stored in a memory, and the memory can be implemented in a computing device using a standard storage device (e.g., such as a random access memory (RAM)). The computer program instructions can also be stored in other non-temporary computer-readable media (e.g., such as a CD-ROM or a flash drive, etc.). Furthermore, those skilled in the art should appreciate that the functionality of various computing devices may be combined or integrated into a single computing device, or that the functionality of a particular computing device may be distributed across one or more other computing devices without departing from the spirit and scope of the exemplary embodiments of the present disclosure.

[0186] According to the display device and the driving method of the display device according to the embodiments of the present disclosure, the structures of pixels and power components of the display device including a plurality of displays can be simplified, and power consumption can be reduced.

[0187] Although the technical spirit of the present disclosure has been described in detail with reference to exemplary embodiments, it should be noted that the exemplary embodiments are illustrative and are not intended to limit the technical spirit of the present disclosure. In addition, it will be understood by those skilled in the art that various changes in form and details may be made without departing from the spirit and scope of the present disclosure.

[0188] Therefore, the technical scope of the present disclosure should be defined by the technical spirit of the claims rather than by the detailed description. In addition, all changes or modifications made within the meaning and scope of the claims or their equivalents should be interpreted as falling within the scope of the present disclosure.

Claims

1. A display device, comprising: a first display, the first display comprising first pixels; a second display, the second display comprising second pixels; a first driver configured to drive the first display; a second driver configured to drive the second display; a controller configured to control the first driver and the second driver; a first power source configured to supply first power to the first display and the second display; as well as a second power source configured to supply second power to the first display and the second display, Wherein, the second power supply comprises: a first voltage source configured to generate a first voltage, and the first voltage is set as a low-level voltage for the first pixel to emit light; a second voltage source configured to generate a second voltage, and the second voltage is set to a high level voltage for the first pixel not to emit light; a first switch configured to couple the first display to one of the first voltage source and the second voltage source; and A second switch is configured to couple the second display to one of the first voltage source and the second voltage source.

2. The display device according to claim 1, wherein: The first display is driven in a display mode or a sensing mode, wherein, when the first display is driven in the display mode, the first switch couples the first display to the first voltage source, and when the first display is driven in the sensing mode, the first switch couples the first display to the second voltage source, wherein the second display is driven in the display mode or the sensing mode, and Wherein, when the second display is driven in the display mode, the second switch connects the second display to the first voltage source, and when the second display is driven in the sensing mode, the second switch connects the second display to the second voltage source.

3. The display device according to claim 2, wherein: When the first display is driven in the display mode, the second display is driven in the sensing mode.

4. The display device according to claim 1, wherein: Each of the first pixel and the second pixel includes: a light emitting element, the light emitting element being connected between the first power source and the second power source; a first transistor coupled between the first power source and the light emitting element and configured to control a driving current supplied to the light emitting element in response to a voltage of a first node; a second transistor, the second transistor being connected between the first node and the data line, and being turned on when a scan signal is supplied to the scan line; a third transistor connected between the sensing line and a second node located between the light emitting element and the first transistor, the third transistor being turned on when a control signal is supplied to the control line; and A storage capacitor is coupled between the first node and one electrode of the first transistor or the second node.

5. The display device according to claim 4, wherein: Each of the first driver and the second driver includes: a scan driver configured to supply the scan signal to the scan line; a control line driver configured to supply the control signal to the control line; a data driver configured to supply a data signal or a reference voltage to the data line; and a sensor coupled to the sensing line and configured to generate an output signal corresponding to a voltage of the second node; wherein the reference voltage is set to a voltage for turning on the first transistor during each sensing period for detecting characteristic information of the first pixel or the second pixel, and Before the reference voltage is supplied to the data line, the sensor supplies a precharge voltage lower than the reference voltage to the sensing line.

6. The display device according to claim 5, wherein: The controller comprises: A compensator is configured to convert input image data in response to the output signal from the sensor and to supply the converted image data to the data driver.

7. A method for driving a display device, wherein: The display device includes a first display having a first pixel and a second display having a second pixel, and the driving method includes: displaying an image in the first display during supplying first operating power to the first display so that the first pixel emits light, the first operating power including first power from a first power source and second power from a first voltage source of a second power source, the first power from the first power source having a higher potential than the second power from the first voltage source of the second power source; and During at least one period during which the image is displayed in the first display, characteristic information of the second pixel is detected while second operating power is supplied to the second display so that the second pixel does not emit light, the second operating power includes the first power from the first power source and second power from a second voltage source of the second power source, the second power from the second voltage source of the second power source having a high level voltage so that the second pixel does not emit light, During the detection of the characteristic information of the second pixel, the first display is connected to the first voltage source of the second power supply, and the second display is connected to the second voltage source of the second power supply.

8. The driving method according to claim 7, further comprising: displaying an image in the second display by supplying the first operating power to the second display; as well as During at least one period during which the image is displayed in the second display, characteristic information of the first pixel is detected by supplying the second operating power to the first display.

9. A method for driving a display device, wherein: The display device includes a first display having a first pixel and a second display having a second pixel, and the driving method includes: displaying an image on the first display, and When the image is displayed on the first display, characteristic information of the second pixel is detected during at least one period, Wherein, detecting the characteristic information of the second pixel includes: supplying a precharge voltage having a first low voltage to a sensing line coupled to the second pixel; supplying a reference voltage having a second low voltage higher than the first low voltage to a data line so that the second pixel does not emit light; and The characteristic information of the second pixel is detected by connecting the sensing line to a sensor.

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