Luminous display panel and luminous display device including the panel

Abstract

The light-emitting display panel includes a plurality of pixels, a plurality of gate lines for transmitting gate signals to the plurality of pixels, a plurality of data lines for transmitting data voltages to the plurality of pixels, and sensing lines connected to a plurality of light-emitting devices respectively included in the plurality of pixels. Each of the plurality of pixels includes: a light-emitting device; a sensing control transistor including a first terminal connected to a first terminal of the light-emitting device and a gate connected to the sensing control line; and a sensing switch transistor including a first terminal connected to a second terminal of the sensing control transistor, a second terminal connected to the sensing line, and a gate connected to the sensing switch line.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of Korean Patent Application No. 10-2020-0148837, filed on November 9, 2020, which is incorporated herein by reference as if fully set forth herein. Technical Field

[0003] The present disclosure relates to a light-emitting display panel and a light-emitting display device including the panel. Background Art

[0004] The light-emitting display device is a display device that emits light by using a light-emitting device, and includes a light-emitting display panel including a plurality of light-emitting devices.

[0005] As the light emitting display device continues to be used, the light emitting device deteriorates and thus the characteristics of the light emitting device change. As a result, the light emitting device cannot emit light normally.

[0006] Sensing of the light emitting device is performed to examine a degree of characteristic variation of the light emitting device. Summary of the Invention

[0007] The inventors recognized that in a light-emitting display device, multiple pixels are connected to a sensing line. When sensing one pixel connected to the sensing line, current leaking from other pixels connected to the sensing line is transmitted through the sensing line. Consequently, problems may arise if one light-emitting device connected to the sensing line is not accurately sensed. The inventors of the present disclosure provide one or more embodiments that address this and other technical issues in related technical fields.

[0008] Accordingly, the present disclosure is directed to a light-emitting display panel and a light-emitting display device including the same that substantially obviate one or more problems due to limitations and disadvantages of the related art.

[0009] One aspect of the present disclosure is to provide a light-emitting display panel that prevents leakage current from being generated in pixels that do not perform sensing on a light-emitting device, and a light-emitting display apparatus including the same.

[0010] Additional advantages and features of the present disclosure will be described in part in the following description and will become apparent to those skilled in the art upon examination of the following text or may be learned from practice of the present disclosure. The technical effects and other advantages of the present disclosure may be achieved and obtained through the structures specifically pointed out in the written description and claims, as well as in the accompanying drawings.

[0011] To achieve these and other advantages and in accordance with the purposes of the present disclosure, as specifically presented and generally described herein, a light-emitting display panel is provided, comprising: a plurality of pixels; a plurality of gate lines, the plurality of gate lines transmitting gate signals to the plurality of pixels; a plurality of data lines, the plurality of data lines transmitting data voltages to the plurality of pixels; and sensing lines, the sensing lines being connected to a plurality of light-emitting devices respectively included in the plurality of pixels, wherein each of the plurality of pixels comprises: a light-emitting device; a sensing control transistor, the sensing control transistor comprising a first terminal connected to a first terminal of the light-emitting device, and a gate connected to the sensing control line; and a sensing switch transistor, the sensing switch transistor comprising a first terminal connected to a second terminal of the sensing control transistor, a second terminal connected to the sensing line, and a gate connected to the sensing switch line.

[0012] In another aspect of the present disclosure, a light-emitting display device is provided, which includes: a light-emitting display panel, the light-emitting display panel including a plurality of pixels; a gate driver, the gate driver supplies a gate signal to a gate line included in the light-emitting display panel; a data driver, the data driver supplies a data voltage to a data line included in the light-emitting display panel and converts a sensing signal transmitted through a sensing line included in the light-emitting display panel into sensing data; a controller, the controller stores the sensing data; and a switch driver, the switch driver connects the data line or the sensing line to the data driver based on a switch driver control signal transmitted from the controller, wherein the sensing line is connected to a plurality of light-emitting devices respectively included in the plurality of pixels, each of the plurality of pixels including: a light-emitting device; a sensing control transistor, the sensing control transistor including a first terminal connected to a first terminal of the light-emitting device, and a gate connected to the sensing control line; and a sensing switching transistor, the sensing switching transistor including a first terminal connected to a second terminal of the sensing control transistor, a second terminal connected to the sensing line, and a gate connected to the sensing switching line.

[0013] It is to be understood that both the foregoing general description and the following detailed description of the present disclosure are explanatory and are intended to provide further examples of the disclosure as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this application. The accompanying drawings illustrate embodiments of the present disclosure and together with the description serve to explain the principles of the present disclosure. In the drawings:

[0015] Figure 1 is a view showing a configuration of a light emitting display device according to an embodiment of the present disclosure;

[0016] Figure 2 is a view showing a structure of a pixel applied to a light-emitting display device according to an embodiment of the present disclosure;

[0017] Figure 3 is a view showing a configuration of a gate driver applied to a light emitting display device according to an embodiment of the present disclosure;

[0018] Figure 4 is a view showing a configuration of a controller applied to a light-emitting display device according to an embodiment of the present disclosure;

[0019] Figure 5 is a view showing a structure of each of a data driver and a switch driver applied to a light emitting display device according to an embodiment of the present disclosure;

[0020] Figure 6 is a view showing waveforms of signals applied in a light emitting device sensing period of a light emitting display apparatus according to an embodiment of the present disclosure;

[0021] Figure 7 and Figure 8 It is used based on Figure 6 Signal description shown Figure 5 A diagram illustrating a method of operating the data driver and the switch driver;

[0022] Figure 9 is another view showing waveforms of signals applied in a light emitting device sensing period of a light emitting display apparatus according to an embodiment of the present disclosure; and

[0023] Figures 10 to 12 It is used based on Figure 9 Signal description shown Figure 2 and Figure 5 A view showing the operation method of the pixel driving circuit shown. DETAILED DESCRIPTION

[0024] Reference will now be made in detail to the embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numerals will be used throughout the drawings to refer to the same or like parts.

[0025] The advantages and features of the present disclosure and their implementation methods will be illustrated by the following embodiments described with reference to the accompanying drawings. However, the present disclosure may be presented in different forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure will be thorough and complete and will fully convey the scope of the present disclosure to those skilled in the art.

[0026] The shapes, sizes, ratios, angles and quantities disclosed in the drawings for describing the embodiments of the present disclosure are merely examples, and therefore, the present disclosure is not limited to the illustrated details. Throughout the specification, similar reference numerals refer to similar elements. In the following description, when it is determined that a detailed description of a related known function or configuration unnecessarily obscures the main points of the present disclosure, the detailed description will be omitted. Where “including,” “having,” and “comprising” described in this specification are used, another component may be added unless “only…” is used. Terms in the singular may include plural forms unless the opposite meaning is mentioned.

[0027] When explaining an element, although there is no explicit description, the element is interpreted as including a range of error.

[0028] When describing a positional relationship, for example, when the positional relationship between two components is described as "on," "over," "under," and "beside," one or more other components may be set between the two components unless "only" or "directly" is used.

[0029] When describing a temporal relationship, for example, when a temporal order is described as "after," "followed by," "next to," and "before," discontinuous cases may be included unless "only" or "directly" is used.

[0030] It should be understood that although the terms "first," "second," etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element, without departing from the scope of this disclosure.

[0031] When describing the elements of the present disclosure, terms such as "first", "second", "A", "B", "(a)", "(b)", etc. may be used. These terms are used only to distinguish the corresponding elements from other elements, and the nature, order or priority of the corresponding elements are not limited by these terms. It should be understood that when an element or layer is referred to as being "on" or "connected to" another element or layer, it can be directly on or directly connected to the other element or layer, or there can be intervening elements or layers. In addition, it should be understood that when an element is set on or under another element, it can indicate that the elements are set to be in direct contact with each other, and it can indicate that the elements are set to be not in direct contact with each other.

[0032] The term "at least one" should be understood to include any and all combinations of one or more of the associated listed elements. For example, "at least one of a first element, a second element, and a third element" means at least two of the first element, the second element, and the third element, as well as all combinations of elements listed from the first element, the second element, or the third element.

[0033] The features of the various embodiments of the present disclosure may be coupled or combined with each other in part or in whole, and may interoperate and be driven technically in different ways as will be fully understood by those skilled in the art. The embodiments of the present disclosure may be performed independently of each other, or may be performed together in a mutually dependent relationship.

[0034] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0035] Figure 1 is a view showing a configuration of a light emitting display device according to an embodiment of the present disclosure. Figure 2 is a view showing a structure of a pixel applied to a light-emitting display device according to an embodiment of the present disclosure.

[0036] Figure 3 is a view showing a configuration of a gate driver applied to a light emitting display device according to an embodiment of the present disclosure. Figure 4 is a view showing a configuration of a controller applied to a light emitting display device according to an embodiment of the present disclosure.

[0037] The light-emitting display device according to the embodiment of the present disclosure can constitute various electronic devices. For example, the electronic device may include a smartphone, a tablet personal computer (PC), a television (TV), and a monitor.

[0038] like Figure 1 As shown, the light-emitting display device according to an embodiment of the present disclosure may include a light-emitting display panel 100 including a plurality of pixels 101, a gate driver 200 that supplies a gate signal to a gate line GL included in the light-emitting display panel 100, a data driver 300 that supplies a data voltage to a data line DL included in the light-emitting display panel 100 and converts a sensing signal transmitted through a sensing line SL included in the light-emitting display panel 100 into sensing data, a controller 400 that stores the sensing data, and a switch driver 500 that connects the data line DL or the sensing line SL to the data driver 300 based on a switch driver control signal transmitted from the controller 400.

[0039] First, the light emitting display panel 100 may include a display area 102 and a non-display area 103. A plurality of gate lines GL1 to GLg, a plurality of data lines DL1 to DLd, a plurality of sensing lines SL1 to SLd, and a plurality of pixels 101 may be disposed in the display area 102.

[0040] For example, Figure 2 As shown, a pixel 101 included in the light-emitting display panel 100 may include a light-emitting device ED, first to fourth transistors Tsw1 to Tsw4, a capacitor Cst, a driving transistor Tdr, a sensing control transistor Tsw5, and a sensing switch transistor Tsw6. That is, the pixel 101 may include a pixel driving circuit PDC and a light-emitting unit, and the pixel driving circuit PDC may include first to fourth transistors Tsw1 to Tsw4, a capacitor Cst, a driving transistor Tdr, a sensing control transistor Tsw5, and a sensing switch transistor Tsw6. The light-emitting unit may include a light-emitting device ED.

[0041] The light emitting device ED may include one of an organic light emitting layer, an inorganic light emitting layer, and a quantum dot light emitting layer, or may include a stacked or combined structure of an organic light emitting layer (or an inorganic light emitting layer) and a quantum dot light emitting layer.

[0042] In addition, the light emitting device ED may emit light corresponding to one of various colors such as red, green, and blue, or may emit white light.

[0043] The first transistor Tsw1 constituting the pixel drive circuit PDC can be turned on or off based on a gate signal VG supplied via a gate line GL. When the first transistor Tsw1 is turned on, a data voltage Vdata supplied via a data line DL can be supplied to the drive transistor Tdr. A first voltage VDD can be supplied to the drive transistor Tdr and the light-emitting device ED via a first voltage supply line PLA, and a second voltage VSS can be supplied to the light-emitting device ED via a second voltage supply line PLB. The second transistor Tsw2 and the sense control transistor Tsw5 can be turned on or off based on a sense control signal VS supplied via a sense control line SCL. The third transistor Tsw3 and the fourth transistor Tsw4 can be turned on or off based on an emission signal EM supplied via an emission line EL. The sense switch transistor Tsw6 can be turned on or off based on a sense switch signal VSW supplied via a sense switch line SSL and can be connected between the sense line SL and the sense control transistor Tsw5. The reference voltage Vref may be supplied to the sensing switch transistor Tsw6 through the sensing line SL, and a sensing signal associated with a characteristic variation of the light emitting device ED may be transmitted to the sensing line SL through the sensing switch transistor Tsw6 .

[0044] Can be Figure 2 The structural configuration shown is applied to the pixel 101 of the present disclosure, but the present disclosure is not limited thereto. Figure 2The light emitting display device of the plurality of pixels 101 of the structure shown is used as an example of the present disclosure. Figure 2 The structure of the pixel 101 is shown.

[0045] Each of the pixels 101 may include a light emitting device ED and a pixel driving circuit PDC.

[0046] The pixel driving circuit PDC may include: a sensing control transistor Tsw5 including a first terminal connected to the first terminal of the light emitting device ED, and a gate connected to the sensing control line SCL; a sensing switch transistor Tsw6 including a first terminal connected to the second terminal of the sensing control transistor Tsw5, a second terminal connected to the sensing line SL, and a gate connected to the sensing switch line SSL; a first transistor Tsw1 including a first terminal connected to the data line DL, and a gate connected to the gate line GL; a driving transistor Tdr including a first terminal connected to the first voltage supply line PLA; a capacitor Cst connected between the second terminal of the first transistor Tsw1 and the driving transistor T dr; a second transistor Tsw2, which includes a first terminal connected to the gate of the driving transistor Tdr, a second terminal connected to the second terminal of the driving transistor Tdr, and a gate connected to the sensing control line SCL; a third transistor Tsw3, which includes a first terminal connected to the second terminal of the first transistor Tsw1, a second terminal connected to the second terminal of the sensing control transistor Tsw5 and the first terminal of the sensing switching transistor Tsw6, and a gate connected to the light emitting line EL; and a fourth transistor Tsw4, which includes a first terminal connected to the second terminal of the driving transistor Tdr, a second terminal connected to the first terminal of the light emitting device ED, and a gate connected to the light emitting line EL.

[0047] In this case, in the light-emitting display panel 100 , a plurality of pixel regions including the pixels 101 may be arranged, and a plurality of signal lines for supplying various signals to the pixel driving circuits PDC included in the pixels 101 may be provided.

[0048] For example, in a Figure 2 In the light-emitting display panel of the pixel 101 shown, the signal lines may include gate lines GL, data lines DL, emission lines EL, sensing control lines SCL, first voltage supply lines PLA, sensing switch lines SSL, second voltage supply lines PLB and sensing lines SL.

[0049] In this case, the gate lines GL and the data lines DL may be disposed in different directions, the sensing lines SL may be disposed in a first direction parallel to the data lines DL, and may be connected to the sensing switching transistors Tsw6 of the pixels disposed in the first direction.

[0050] For example, Figure 1 As shown, in the case where the data lines DL and the sensing lines SL are arranged in a first direction (e.g., a longitudinal direction) of the light-emitting display panel 100, the gate lines GL may be arranged in a second direction (e.g., a transverse direction) of the light-emitting display panel 100. The first direction may be perpendicular to the second direction, but is not limited thereto, and the first direction and the second direction may form various angles therebetween.

[0051] To provide additional description, the light-emitting display panel 100 may include a plurality of pixels 101, a plurality of gate lines GL1 to GLg that transmit a plurality of gate signals VG to the pixels 101, a plurality of data lines DL1 to DLd that transmit data voltages to the pixels 101, and a plurality of sensing lines SL1 to SLd connected to a plurality of light-emitting devices ED respectively included in the pixels 101. In this case, each pixel 101 may include: a light-emitting device ED; a sensing control transistor Tsw5 including a first terminal connected to a first terminal of the light-emitting device ED and a gate connected to a sensing control line SCL; and a sensing switch transistor Tsw6 including a first terminal connected to a second terminal of the sensing control transistor Tsw5, a second terminal connected to a sensing line SL, and a gate connected to a sensing switch line SSL.

[0052] The data driver 300 may be provided in the form of a chip on film (COF) attached to the light-emitting display panel 100, and may be connected to a main substrate including the controller 400. In this case, the COF may include a plurality of wires electrically connecting the controller 400, the data driver 300, and the light-emitting display panel 100. Therefore, in some embodiments, the wires may electrically connect the main substrate to a plurality of pads included in the light-emitting display panel 100. The main substrate may be electrically connected to an external substrate having an external system mounted thereon.

[0053] The data driver 300 may be directly mounted on the light-emitting display panel 100 and then may be electrically connected to the main substrate.

[0054] However, the data driver 300 may be implemented as one integrated circuit (IC) together with the controller 400 , and the IC may be provided on a COF or may be directly mounted on the light-emitting display panel 100 .

[0055] The data driver 300 may receive a sensing signal associated with a characteristic change of the light emitting device ED included in the light emitting display panel 100 from the light emitting display panel 100 and may transmit the sensing signal to the controller 400 .

[0056] The gate driver 200 may be configured as an IC and mounted in the non-display area 103, or may be directly embedded in the non-display area 103 by using a gate-in-panel (GIP) type. In the case of adopting the GIP type, a plurality of transistors constituting the gate driver 200 may be provided in the non-display area 103 by the same process as the transistors included in each pixel 101 in the display area 102.

[0057] When a gate pulse generated by the gate driver 200 is supplied to the gate of the first transistor Tsw1 included in the pixel 101, the first transistor Tsw1 may be turned on. When a gate-off signal is supplied to the first transistor Tsw1, the first transistor Tsw1 may be turned off. The gate signal VG supplied through the gate line GL may include a gate pulse and a gate-off signal.

[0058] like Figure 3 As shown, the gate driver 200 may include a plurality of stages 201 that supply a plurality of gate pulses GP1 to GPg to the gate lines GL1 to GLg connected to the pixels 101 .

[0059] Each stage 201 may include a plurality of transistors, and various clocks and voltages may be supplied to each stage 201 .

[0060] Each stage 201 may generate a gate signal VG supplied to the gate lines GL1 to GLg. Figure 2 As shown, various signals (eg, a sensing control signal VS, a light emitting signal EM, and a sensing switch signal VSW) may also be generated.

[0061] In this case, the gate signal VG, the sensing control signal VS, the emission signal EM, and the sensing switching signal VSW supplied to one pixel 101 may be generated by one stage 201 or may be generated by at least two stages 201 .

[0062] The above-mentioned signals can be generated in various forms by using the configuration and function of a currently known gate driver. Therefore, the description of the detailed structure of the stage 201 for generating the above-mentioned signals is omitted.

[0063] The controller 400 may include: a data arranger 430, which rearranges a plurality of video data Ri, Gi, and Bi transmitted from an external system by using a timing synchronization signal TSS transmitted from the external system to supply the rearranged plurality of image data Data to the data driver 300; a control signal generator 420, which generates a gate control signal GCS and a data control signal DCS by using the timing synchronization signal TSS; an input unit 410, which receives the timing synchronization signal TSS and the plurality of video data Ri, Gi, and Bi transmitted from the external system, and transmits the timing synchronization signal TSS and the plurality of video data Ri, Gi, and Bi to the data arranger 430 and the control signal generator 420; and an output unit 440, which outputs the plurality of image data Data generated by the data arranger 430 and the control signals GCS and DCS generated by the control signal generator 420 to the data driver 300 or the gate driver 200.

[0064] The controller 400 may perform a function of storing the sensing data Sdata transmitted from the data driver 300. Therefore, in some embodiments, the controller 400 may include a storage unit 450. However, the storage unit 450 may be provided as an independent element in the light emitting display device.

[0065] The control signal generator 420 may generate a control signal for controlling the switch driver 500 (hereinafter, simply referred to as a switch driver control signal).

[0066] The external system can perform the functions of driving the controller 400 and the electronic device. That is, when the electronic device is a smartphone, the external system can receive various sound information, image information, and text information through a wireless communication network, and can transmit the received image information to the controller 400. The image information can include multiple pieces of input video data Ri, Gi, and Bi.

[0067] The switch driver 500 may connect the data line DL or the sensing line SL to the data driver 300 based on a switch driver control signal transmitted from the controller 400 .

[0068] The switch driver 500 may be included in the data driver 300 , or may be provided independently of the data driver 300 .

[0069] When the switch driver 500 is an independent component, such as Figure 1 As shown, the switch driver 500 may be provided in the non-display area 103, specifically, in the area provided with the data driver 300. In the following description, a light emitting display device including an independently provided switch driver 500 will be described as an example of the present disclosure.

[0070] The following will refer to Figure 5 The detailed configuration and function of the switch driver 500 are described.

[0071] Figure 5 is a view showing a structure of each of a data driver and a switch driver applied to a light emitting display device according to an embodiment of the present disclosure.

[0072] As described above, the data driver 300 may supply a data voltage to the data line DL included in the light-emitting display panel 100, and may convert a sensing signal transmitted through the sensing line SL included in the light-emitting display panel 100 into sensing data Sdata, and the sensing data Sdata may be transmitted to the controller 400. In addition, the switch driver 500 may connect the data line DL or the sensing line SL to the data driver 300 based on a switch driver control signal transmitted from the controller 400.

[0073] To perform the above functions, you can Figure 5 The data driver 300 and the switch driver 500 are configured as shown.

[0074] First, the data driver 300 may include: a data voltage generator 320 that generates a data voltage Vdata to be transmitted to the data line DL; a reference voltage transmitter 310 that transmits the reference voltage Vref to the sensing line SL; a converter 330 that converts a sensing signal transmitted through the sensing line SL into sensing data Sdata and outputs the sensing data Sdata to the controller 400; and a switching unit 340 that connects the switch driver 500 to one of the data voltage generator 320, the reference voltage transmitter 310, and the converter 330.

[0075] The reference voltage transmitter 310 may directly generate and output the reference voltage Vref by using power supplied from a power source, or may output the reference voltage Vref supplied from the power source.

[0076] The data voltage generator 320 may convert the digital image data DATA transmitted from the controller 400 into an analog data voltage Vdata and may output the analog data voltage Vdata. The data voltage generator 320 may be a data driver generally used to convert the image data DATA into the data voltage Vdata, and thus, a detailed description of the data voltage generator 320 is omitted.

[0077] The converter 330 may convert the sensing signal transmitted through the sensing line SL into sensing data Sdata and may output the sensing data Sdata to the controller 400. Therefore, in some embodiments, the converter 330 may include an analog-to-digital converter (ADC) that converts the analog sensing signal into digital sensing data Sdata.

[0078] In order to accurately control the operation timing of each of the converter 330, the data voltage generator 320 and the reference voltage transmitter 310, a switch may be included in each of the converter 330, the data voltage generator 320 and the reference voltage transmitter 310, and the inclusion of multiple switches in the converter 330, the data voltage generator 320 and the reference voltage transmitter 310 may be controlled by the data control signal DCS transmitted from the controller 400.

[0079] The data control signal DCS may include various control signals for controlling the operation timing of each of the reference voltage transmitter 310 , the data voltage generator 320 , and the converter 330 .

[0080] The switching unit 340 may connect the switch driver 500 to one of the reference voltage transmitter 310 , the data voltage generator 320 , and the converter 330 .

[0081] Therefore, in some embodiments, the switching unit 340 can be connected to the switch driver 500 through a line (hereinafter, referred to as the connection line CL), and the connection line CL can be connected to one of the reference voltage transmitter 310, the data voltage generator 320 and the converter 330 based on the first switching control signal SS1, the second switching control signal SS2 and the third switching control signal SS3 transmitted from the controller 400.

[0082] The first to third switching control signals SS1 to SS3 may be included in the data control signal DCS generated by the controller 400 .

[0083] The switch unit 340 may include a first switch 341 , a second switch 342 , and a third switch 343 .

[0084] The first switch control signal SS1 can control the first switch 341 connected between the reference voltage transmitter 310 and the connection line CL, the second switch control signal SS2 can control the second switch 342 connected between the data voltage generator 320 and the connection line CL, and the third switch control signal SS3 can control the third switch 343 connected between the converter 330 and the connection line CL.

[0085] The first to third switches 341 to 343 may each include a transistor that is turned on or off by the first to third switching control signals SS1 to SS3 .

[0086] Next, the switch driver 500 may include a first switching unit 510 connecting the data line DL to the data driver 300 , and a second switching unit 520 connecting the sensing line SL to the data driver 300 .

[0087] That is, the first switching unit 510 may be connected between the data line DL and the connection line CL, and the second switching unit 520 may be connected between the sensing line SL and the connection line CL.

[0088] When the data line DL is connected to the connection line CL through the first switching unit 510 , the sensing line SL is not connected to the connection line CL through the second switching unit 520 .

[0089] like Figure 5 As shown, the first switching unit 510 may include a transistor including a first terminal connected to the connection line CL, a second terminal connected to the data line DL, and a gate connected to the first signal line 511. A first control signal DMUX may be supplied to the first signal line 511.

[0090] like Figure 5 As shown, the second switching unit 520 may include a transistor including a first terminal connected to the connection line CL, a second terminal connected to the sensing line SL, and a gate connected to the second signal line 521. A second control signal SMUX may be supplied to the second signal line 511.

[0091] The switch driver control signal may include a first control signal DMUX and a second control signal SMUX.

[0092] As described above, the switch driver control signal may be generated by the control signal generator 420 of the controller 400 .

[0093] To prevent static electricity, one side of the capacitor may be connected to the data line DL to prevent static electricity, and the other side of the capacitor may be connected to the line supplying the second voltage VSS. In addition, to prevent static electricity, one side of the capacitor may be connected to the sensing line SL, and the other side of the capacitor may be connected to the line supplying the second voltage VSS.

[0094] Figure 6 is a view showing waveforms of signals applied in a light emitting device sensing period of a light emitting display apparatus according to an embodiment of the present disclosure, Figure 7 and Figure 8 It is used based on Figure 6 Signal description shown Figure 5 FIG. 1 is a diagram illustrating the operation method of the data driver and the switch driver.

[0095] First, Figure 7 is a view for describing an operation method of the data driver 300 and the switch driver 500 in the charging period CP of the light emitting device sensing period ESP for sensing characteristic changes of the light emitting device.

[0096] First, when the charging period CP starts, the controller 400 can transmit the first switching control signal SS1 to the first switch 341 to connect the connection line CL to the reference voltage transmitter 310, transmit the third switching control signal SS3 to the third switch 343 to disconnect the connection line CL from the converter 330, and transmit the second switching control signal SS2 to the second switch 342 to disconnect the connection line CL from the data voltage generator 320.

[0097] Therefore, the connection line CL may be connected to the reference voltage transmitter 310 through the first switch 341 .

[0098] Subsequently, the controller 400 may transmit the first control signal DMUX and the second control signal SMUX to the first signal line 511 and the second signal line 521 so that the first switching unit 510 is turned off and the second switching unit 520 is turned on.

[0099] Therefore, the sensing line SL may be connected to the connection line CL through the second switching unit 520 , and the connection line CL may be connected to the data line DL through the first switching unit 510 .

[0100] Subsequently, through the above-described process, the sensing line SL may be connected to the reference voltage transmitter 310 .

[0101] Subsequently, the sensing line SL may be connected to the reference voltage transmitter 310 , and thus, the reference voltage Vref may be supplied from the reference voltage transmitter 310 to the pixel through the sensing line SL.

[0102] In this case, the sensing switch transistor Tsw6 can be turned on by the sensing switch signal VSW, and the sensing control transistor Tsw5 can be turned on by the sensing control signal VS. Therefore, the reference voltage Vref transmitted through the sensing line SL can be applied to the first terminal of the light-emitting device ED through the sensing switch transistor Tsw6 and the sensing control transistor Tsw5. In addition, the first transistor Tsw1, the third transistor Tsw3, and the fourth transistor Tsw4 can be turned off by the gate signal VG and the emission signal EM. Therefore, the first voltage VDD may not be applied to the light-emitting device ED.

[0103] Finally, if Figure 6 As shown, the voltage VED at the first terminal of the light emitting device ED may increase based on the reference voltage Vref applied to the first terminal of the light emitting device ED.

[0104] That is, in the charging period CP, charges may be charged in the light emitting device ED based on the reference voltage Vref applied to the light emitting device ED through the sensing line SL.

[0105] second, Figure 8is a view for describing an operation method of the data driver 300 and the switch driver 500 in the sensing period SP of the light emitting device sensing period ESP for sensing characteristic changes of the light emitting device.

[0106] First, when the sensing period SP is performed, the sensing switch transistor Tsw6 and the sensing control transistor Tsw5 may maintain a turned-on state, and the first transistor Tsw1 , the third transistor Tsw3 , and the fourth transistor Tsw4 may maintain a turned-off state.

[0107] When the sensing period SP starts, the controller 400 can transmit the first switching control signal SS1 to the switching unit 340 to disconnect the connection line CL from the reference voltage transmitter 310, and can transmit the second switching control signal SS2 to the second switch 342 to disconnect the connection line CL from the data voltage generator 320. When a selected (or predetermined) time has passed after the connection line CL is disconnected from the reference voltage transmitter 310, the controller 400 can transmit the third switching control signal SS3 to the third switch 343 to connect the connection line CL to the converter 330.

[0108] Therefore, the connection line CL may be connected to the converter 330 through the third switch 343 .

[0109] Subsequently, the controller 400 may continuously transmit the first control signal DMUX and the second control signal SMUX to the first signal line 511 and the second signal line 521 to turn off the first switching unit 510 and turn on the second switching unit 520 .

[0110] Therefore, the sensing line SL may be connected to the connection line CL through the second switching unit 520 .

[0111] Subsequently, through the above-described process, the sensing line SL may be connected to the converter 330 .

[0112] Subsequently, the sensing line SL can be connected to the converter 330, the sensing switch transistor Tsw6 can be turned on by the sensing switch signal VSW, and the sensing control transistor Tsw5 can be turned on by the sensing control signal VS, whereby the charge charged in the first terminal of the light emitting device ED can be discharged through the sensing line SL.

[0113] Therefore, if Figure 6 As shown, the voltage VED at the first terminal of the light emitting device ED may decrease.

[0114] Finally, when the third switch 343 is turned off by the third switch control signal SS3, the converter 330 may convert the sensing signal sensed through the sensing line SL into sensing data Sdata and transmit the generated sensing data Sdata to the controller 400. The sensing signal may be a voltage applied to the first terminal of the light emitting device ED.

[0115] That is, the level of the threshold voltage of the light-emitting device ED may change based on the degree of degradation of the light-emitting device ED, and when the level of the threshold voltage of the light-emitting device ED changes, the amount of charge leaked through the light-emitting device ED within a selected (or predetermined) time may change, and the amount of leaked charge may be proportional to the voltage.

[0116] Therefore, the magnitude of the characteristic change of the light emitting device ED (eg, the amount of change in the threshold voltage of the light emitting device) may be determined by measuring the voltage level sensed in the converter 330 .

[0117] To provide additional description, the input unit 410 of the controller 400 may analyze the sensing data Sdata transmitted from the converter 330 to sense the amount of change in the threshold voltage of the light emitting device ED, and thus, may determine the degree of degradation of the light emitting device ED.

[0118] The variation amount of the threshold voltage calculated by the input unit 410 may be stored in the storage unit 450 .

[0119] When the light-emitting display device changes to a display mode and displays an image, the controller 400 can convert the input video data into image data DATA based on the change in the threshold voltage stored in the storage unit 450, change the level of the first voltage VDD based on the change in the threshold voltage, and change the level of the reference voltage Vref based on the change in the threshold voltage.

[0120] That is, the variation amount of the threshold voltage of the light emitting device ED determined through the above process may be applied to various compensation methods performed when the light emitting display apparatus is driven in the display mode.

[0121] For example, in a display mode in which the light-emitting display device displays an image, compensation for changing the level of the image data DATA (hereinafter referred to as external compensation) may be performed to compensate for characteristic changes caused by degradation of the driving transistor Tdr included in the pixel 101. Furthermore, in the display mode, compensation for preventing the threshold voltage of the driving transistor from adversely affecting the luminance of the light-emitting device (hereinafter referred to as internal compensation) may be performed to prevent characteristic changes (e.g., changes in the threshold voltage) caused by degradation of the driving transistor Tdr from adversely affecting the luminance of the light-emitting device.

[0122] However, when degradation of the light emitting device ED causes a change in the threshold voltage of the light emitting device, luminance accurately corresponding to the data voltage may not occur when external compensation or internal compensation is performed without considering the amount of change in the threshold voltage of the light emitting device.

[0123] Therefore, when performing external compensation or internal compensation, the controller can perform external compensation or internal compensation more completely based on the characteristic change of the light-emitting device ED (for example, the change in threshold voltage) calculated through the above process, thereby improving the quality of the light-emitting display device.

[0124] The compensation method performed using the characteristic change amount (e.g., threshold voltage change amount) of the light-emitting device ED calculated according to the present disclosure can vary depending on the characteristics and functions of the light-emitting display device, and this compensation method can be one of various compensation methods currently implemented. Furthermore, the above-mentioned compensation method may not be a fundamental feature of the present disclosure. That is, the present disclosure can be used to calculate the characteristic change amount of the light-emitting device ED that can be applied to the above-mentioned compensation method. Therefore, a detailed description of the above-mentioned compensation method is omitted.

[0125] In this case, when the user uses the light-emitting display device, the above-mentioned process of calculating the characteristic change amount of the light-emitting device ED can be automatically performed in each selected (or predetermined) time period, or the above-mentioned process can be performed when performing the process of repairing the light-emitting display device, or the above-mentioned process can be performed when performing the process of manufacturing the light-emitting display device.

[0126] For example, in the case where a user uses a light-emitting display device, the above reference Figures 6 to 8 The described process can be performed once every month, year, or 1000 hours, and the characteristic change amount of the light-emitting device calculated by the process can be stored in the storage unit 450. In this case, the above process can be performed when the light-emitting display device is turned on or off based on the control of the controller 400 or the control of the external system. Subsequently, when the light-emitting display device is driven in the display mode, the controller 400 can perform internal compensation or external compensation by using the characteristic change amount of the light-emitting device stored in the storage unit 450, so that the image quality of the light-emitting display device can be continuously maintained.

[0127] As another example, the above reference Figures 6 to 8 The described process may be performed when performing a process of repairing a light-emitting display device or manufacturing a light-emitting display device, and the characteristic variation of the light-emitting device calculated by the process may be stored in the storage unit 450. Subsequently, when the light-emitting display device is driven in a display mode, the controller 400 may perform internal compensation or external compensation by using the characteristic variation of the light-emitting device stored in the storage unit 450, and thus the image quality of the light-emitting display device may be continuously maintained.

[0128] That is, you can determine the execution of the above reference Figures 6 to 8 The beneficial effects of the process described above can be achieved by, therefore, when a user, a repairer or a manufacturer operates the controller 400 in the light emitting device sensing mode or the controller 400 is automatically driven within a selected (or predetermined) period of time, the above-mentioned reference Figures 6 to 8 Describe the process.

[0129] Figure 9 is another view showing waveforms of signals applied in a light emitting device sensing period of a light emitting display apparatus according to an embodiment of the present disclosure, Figures 10 to 12 It is used based on Figure 9 Signal description shown Figure 2 and Figure 5 A view showing the operation method of the pixel driving circuit shown.

[0130] Specifically, Figure 9 The waveforms of the sensing control signals VS(n-1), VS(n) and VS(n+1) and the sensing switching signals VSW(n-1), VSW(n) and VSW(n+1) supplied to the pixels connected to the n-1th gate line GLn-1, the nth gate line GLn and the n+1th gate line GLn+1 are shown.

[0131] also, Figures 10 to 12 The n-1th pixel P(n-1) connected to the n-1th gate line GLn-1, the nth pixel P(n) connected to the nth gate line GLn, and the n+1th pixel P(n+1) connected to the n+1th gate line GLn+1 are shown.

[0132] also, Figure 10 shows a method of sensing characteristic changes of the light emitting device ED included in the n-1th pixel P(n-1), Figure 11 shows a method of sensing characteristic changes of the light emitting device ED included in the n-th pixel P(n), Figure 12 A method of sensing characteristic changes of the light emitting device ED included in the n+1 pixel P(n+1) is shown.

[0133] In this case, for ease of description, Figures 10 to 12 Each of the pixels P(n-1), P(n), and P(n+1) shown only shows the components of the Figures 2 to 5 The transistors of the pixel driving circuit shown include a sensing control transistor Tsw5 and a sensing switch transistor Tsw6.

[0134] In the following description, the signal in the sensing control signal VS that turns on the sensing control transistor Tsw5 may be referred to as a sensing control pulse VSp, and the signal in the sensing control signal VS that turns off the sensing control transistor Tsw5 may be referred to as a sensing control off signal. In addition, the signal in the sensing switch signal VSW that turns on the sensing switch transistor Tsw6 may be referred to as a sensing switch pulse VSWp, and the signal in the sensing switch signal VSW that turns off the sensing switch transistor Tsw6 may be referred to as a sensing switch off signal.

[0135] In this case, Figure 9 In the embodiment, the sensing control pulse VSp and the sensing switching pulse VSWp may be signals having a low level L, and the sensing control off signal and the sensing switching off signal may be signals having a high level H.

[0136] That is to say, if Figure 2 and Figure 5 As shown, when the transistors constituting the pixel driving circuit PDC are configured as a P type, the transistors can be turned on by a signal with a low level L and can be turned off by a signal with a high level H.

[0137] Therefore, the sensing control transistor Tsw5 and the sensing switching transistor Tsw6 can be turned on by the sensing control pulse VSp and the sensing switching pulse VSWp with a low level L, and the sensing control transistor Tsw5 and the sensing switching transistor Tsw6 can be turned off by the sensing control cutoff signal and the sensing switching cutoff signal with a high level H.

[0138] In the following description, the above references will be omitted or briefly given. Figures 5 to 8 The description given is the same or similar to the description.

[0139] The light emitting display device according to the present disclosure can display an image by using internal compensation or external compensation in a display mode. Figure 2 and Figure 4 The light emitting display device of the pixel driving circuit PDC shown may use internal compensation.

[0140] Generally, the current flowing in the light emitting device ED may be proportional to the square of the voltage difference (=Vgs−Vth) between the gate-source voltage Vgs of the driving transistor Tdr and the threshold voltage Vth of the driving transistor Tdr. That is, the equation for calculating the current flowing in the light emitting device ED (=k(Vgs−Vth) 2 ) may include a threshold voltage Vth (where k is a proportionality constant).

[0141] Internal compensation can be any method of changing the voltage at each of the source, drain, and gate of the driving transistor Tdr in order to eliminate the threshold voltage Vth term from the equation for calculating the current flowing through the light-emitting device ED. That is, in a light-emitting display device using internal compensation, since the threshold voltage Vth term is eliminated from the equation for calculating the current flowing through the light-emitting device ED, the magnitude of the current flowing through the light-emitting device ED can be independent of the threshold voltage Vth of the driving transistor Tdr. Therefore, even when the threshold voltage Vth of the driving transistor Tdr changes due to degradation of the driving transistor Tdr, the light-emitting device ED can emit light having a brightness corresponding to the data voltage Vdata.

[0142] The features of the present disclosure are not related to the internal compensation, and therefore, a detailed description of the detailed methods associated with the internal compensation is omitted.

[0143] Furthermore, in the present disclosure, the sensing control transistor Tsw5 and the sensing switch transistor Tsw6 connected between the light emitting device ED and the sensing line SL are beneficial among the transistors constituting the pixel driving circuit PDC.

[0144] Therefore, in Figure 2 and Figure 5 In the illustrated pixel driving circuit PDC, the connection structure between transistors other than the sensing control transistor Tsw5 and the sensing switch transistor Tsw6 may be variously modified based on the detailed method of internal compensation or the detailed method of external compensation.

[0145] When a selected (or predetermined) time period for sensing the light-emitting device is reached while a user is using the light-emitting display device, or when sensing of the light-emitting device should be performed during repair of the light-emitting display device, or when sensing of the light-emitting device should be performed during manufacturing of the light-emitting display device, the light-emitting display device can be changed from the display mode to the light-emitting device sensing mode ESP, and thus, the light-emitting device sensing mode ESP can be started.

[0146] That is, the change from the display mode to the light-emitting device sensing mode can be automatically performed, or a request signal for issuing a request to change the mode to the light-emitting device sensing mode can be input to the controller 400 by a user, a repairer or a manufacturer, and thus the change from the display mode to the light-emitting device sensing mode can be performed.

[0147] First, refer to Figure 9 and Figure 10 A sensing method performed on the n-1th light emitting device ED(n-1) included in the n-1th pixel P(n-1) connected to the n-1th gate line GLn-1 is described.

[0148] First, if Figure 9As shown, in the light emitting device sensing mode, when the n-1th light emitting device sensing period ESP(n-1) in which sensing is performed on the n-1th light emitting device ED(n-1) included in the n-1th pixel P(n-1) connected to the n-1th gate line GLn-1 starts, the n-1th sensing switch signal VSW(n-1) having a low level L (e.g., the n-1th sensing switch pulse VSWp(n-1)) may be supplied to the n-1th sensing switch transistor Tsw6(n-1) included in the n-1th pixel P(n-1).

[0149] In this case, before the first switching control signal SS1 having a high level is supplied to the data driver 300 , the n−1th sensing switching pulse VSWp(n−1) may be supplied to the n−1th sensing switching transistor Tsw6 (n−1).

[0150] Subsequently, after the n-1th sensing switch pulse VSWp(n-1) is supplied to the n-1th sensing switch line SSL(n-1), before the n-1th sensing control pulse VSp(n-1) having a low level L is supplied to the n-1th sensing control line SCL(n-1), as described above with reference to Figures 5 to 8 As described above, the switch unit 340 and the switch driver 500 may connect the reference voltage transmitter 310 to the sensing line SL.

[0151] That is to say, if Figure 6 and Figure 9 As shown, when the charging period CP of the light emitting device sensing period ESP begins, the controller 400 may supply the first switching control signal SS1 to the switching unit 340, and the first switching control signal SS1 connects the connection line CL to the reference voltage transmitter 310. In this case, the sensing line SL may be connected to the switching unit 340 by the second control signal SMUX supplied to the switch driver 500.

[0152] Subsequently, the n-1th sensing switch pulse VSWp(n-1) having a low level L may be supplied to the n-1th sensing switch line SSL(n-1), and the first switching control signal SS1 having a high level may be supplied to the switching unit 340, and then, the n-1th sensing control pulse VSp(n-1) having a low level L may be supplied to the n-1th sensing control line SCL(n-1).

[0153] Therefore, the n-1th sensing control transistor Tsw5(n-1) and the n-1th sensing switch transistor Tsw6(n-1) can all be turned on. Figure 10 As shown, the first terminal of the n-th light emitting device ED(n) may be electrically connected to the sensing line SL.

[0154] That is, in the charging period CP, the reference voltage transmitter 310 can be connected to the sensing line SL through the first switching control signal SS1 and the second control signal SMUX, and the first terminal of the n-1th light-emitting device ED(n-1) can be electrically connected to the sensing line SL through the n-1th sensing switching pulse VSWp(n-1) and the n-1th sensing control pulse VSp(n-1).

[0155] Therefore, charges may be charged in the first terminal of the n-1th light emitting device ED(n-1) included in the n-1th pixel P(n-1).

[0156] Finally, the switching unit 340 may connect the converter 330 to the sensing line SL from before supply of the n-1th sensing control pulse VSp(n-1) stops to before supply of the n-1th sensing switching pulse VSWp(n-1) stops.

[0157] That is, the converter 330 may be connected to the sensing line SL in the sensing period SP, and thus, the converter 330 may receive the sensing signal transmitted through the sensing line SL and may convert the sensing signal into the sensing data Sdata.

[0158] Thus, in some embodiments, as described above with reference to Figures 5 to 8 As described above, in the sensing period SP, the third switching control signal SS3 may be supplied to the switching unit 340 so that the connection line CL connected to the sensing line SL is connected to the converter 330 .

[0159] For example, when the pulse width of the first switching control signal SS1 having a high level H supplied to the switching unit 340 in the charging period CP is one horizontal period (hereinafter referred to as 1H), the width of the n-1th sensing control pulse VSp(n-1) may be 1H, and the width of the n-1th sensing switching pulse VSWp(n-1) may be three times 3H of 1H.

[0160] In the above process, when only the charges charged in the n-1th light-emitting device ED(n-1) included in the n-1th pixel P(n-1) are transferred to the converter 330, the characteristic change of the n-1th light-emitting device ED(n-1) included in the n-1th pixel P(n-1) can be accurately measured.

[0161] The period during which the charges charged in the n-1th light-emitting device ED(n-1) contained in the n-1th pixel P(n-1) are transferred to the converter 330 may be a period during which the n-1th sensing control transistor Tsw5(n-1) and the n-1th sensing switch transistor Tsw6(n-1) contained in the n-1th pixel P(n-1) are turned on, specifically, may be a period during which the n-1th sensing control transistor Tsw5(n-1) is turned on.

[0162] Therefore, when the charges charged in the n-1th light-emitting device ED(n-1) are transferred to the converter 330 through the sensing line SL, the nth pixel P(n) and the n+1th pixel P(n+1) should be electrically disconnected from the sensing line SL so that only the charges charged in the n-1th light-emitting device ED(n-1) contained in the n-1th pixel P(n-1) are transferred to the converter 330 through the sensing line SL.

[0163] Therefore, in some embodiments, in the present disclosure, as Figure 9 As shown, when the n-1th sensing control pulse VSp(n-1) is supplied to the n-1th sensing control line SCL(n-1) connected to the n-1th pixel P(n-1) connected to the n-1th gate line GLn-1, a sensing switch turn-off signal for turning off the sensing switch transistors Tsw6(n) and Tsw6(n+1) connected to the n-1th sensing switch line SSL(n) and the n+1th sensing switch line SSL(n+1) can be supplied to the n-1th sensing switch line SSL(n) connected to the n-1th pixel P(n) connected to the n-1th gate line GLn and the n+1th sensing switch line SSL(n+1) connected to the n+1th gate line GLn+1.

[0164] In addition, when the n-1th sensing control pulse VSp(n-1) is supplied to the n-1th sensing control line SCL(n-1), a sensing control turn-off signal for turning off the sensing switch transistors Tsw5(n) and Tsw5(n+1) connected to the nth sensing control line SCL(n) and the n+1th sensing control line SCL(n+1) can be supplied to the nth sensing control line SCL(n) connected to the nth pixel P(n) and the n+1th sensing control line SCL(n+1) connected to the n+1th pixel P(n+1).

[0165] That is to say, if Figure 9 As shown, when the n-1th sensing control pulse VSp(n-1) is supplied to the n-1th pixel P(n-1), the nth sensing switch signal VSW(n) and the n+1th sensing switch signal VSW(n+1) may have a high level H, and the nth sensing control signal VS(n) and the n+1th sensing control signal VS(n+1) may have a high level H.

[0166] Therefore, the nth sensing switch transistor Tsw6(n) supplying the nth sensing switch signal VSW(n), the n+1th sensing switch transistor Tsw6(n+1) supplying the n+1th sensing switch signal VSW(n+1), the nth sensing control transistor Tsw5(n) supplying the nth sensing control signal VS(n), and the n+1th sensing control transistor Tsw5(n+1) supplying the n+1th sensing control signal VS(n+1) can all be cut off.

[0167] Therefore, charges leaked from the nth light emitting device ED(n) included in the nth pixel P(n) and the n+1th light emitting device ED(n+1) included in the n+1th pixel P(n+1) are not transferred to the sensing line SL.

[0168] Therefore, only the charges transferred from the n-1th light-emitting device ED(n-1) included in the n-1th pixel P(n-1) can be transferred to the converter 330 through the sensing line SL, and thus, in the n-1th light-emitting device sensing period ESP(n-1), only the characteristic change of the n-1th light-emitting device ED(n-1) included in the n-1th pixel P(n-1) can be measured.

[0169] That is, according to the present disclosure described above, characteristic variations of a light emitting device can be accurately measured, and thus, various functions for compensating for characteristic variations of the light emitting device can be accurately performed.

[0170] In this case, as described above, the width of the n-1th sensing switching pulse VSWp(n-1) supplied to the n-1th sensing switching line SSL(n-1) to turn on the n-1th sensing switching transistor Tsw6(n-1) may be greater than the width of the n-1th sensing control pulse VSp(n-1) supplied to the n-1th sensing control line SCL(n-1) to turn on the n-1th sensing control transistor Tsw5(n-1). For example, when the width of the n-1th sensing switching pulse VSWp(n-1) is 3H, the width of the n-1th sensing control pulse VSp(n-1) may be 1H.

[0171] In addition, the n-1th sensing switching pulse VSWp(n-1) may be supplied to the n-1th sensing switching line SSL(n-1), and then the n-1th sensing control pulse VSp(n-1) may be supplied to the n-1th sensing control line SCL(n-1).

[0172] Second, refer to Figure 9 and Figure 11The sensing method performed on the n-th light emitting device ED(n) included in the n-th pixel P(n) connected to the n-th gate line GLn is described. In the following description, the above referenced method will be omitted or briefly given. Figure 9 and Figure 10 The description given is the same or similar to the description.

[0173] First, if Figure 9 As shown, in the light emitting device sensing mode, when the nth light emitting device sensing period ESP(n) in which sensing is performed on the nth light emitting device ED(n) included in the nth pixel P(n) connected to the nth gate line GLn begins, the nth sensing switch signal VSW(n) having a low level L (e.g., the nth sensing switch pulse VSWp(n)) may be supplied to the nth sensing switch transistor Tsw6(n) included in the nth pixel P(n).

[0174] In this case, the nth sensing switching pulse VSWp(n) may be supplied to the nth sensing switching transistor Tsw6 (n) before the first switching control signal SS1 having a high level is supplied to the data driver 300 .

[0175] Subsequently, after the nth sensing switch pulse VSWp(n) is supplied to the nth sensing switch line SSL(n), before the nth sensing control pulse VSp(n) having a low level L is supplied to the nth sensing switch line SSL(n), as described above with reference to Figures 5 to 8 As described above, the switch unit 340 and the switch driver 500 may connect the reference voltage transmitter 310 to the sensing line SL.

[0176] Subsequently, the nth sensing switching pulse VSWp(n) having a low level L may be supplied to the nth sensing switching line SSL(n), and the first switching control signal SS1 having a high level may be supplied to the switching unit 340, and then, the nth sensing control pulse VSp(n) having a low level L may be supplied to the nth sensing control line SCL(n).

[0177] Therefore, the nth sensing control transistor Tsw5(n) and the nth sensing switch transistor Tsw6(n) can all be turned on, as shown in FIG. Figure 11 As shown, the first terminal of the n-th light emitting device ED(n) may be electrically connected to the sensing line SL.

[0178] That is, in the charging period CP, the reference voltage transmitter 310 can be connected to the sensing line SL through the first switching control signal SS1 and the second control signal SMUX, and the first terminal of the nth light-emitting device ED(n) can be electrically connected to the sensing line SL through the nth sensing switching pulse VSWp(n) and the nth sensing control pulse VSp(n).

[0179] Therefore, charges may be charged in the first terminal of the n-th light emitting device ED(n) included in the n-th pixel P(n).

[0180] Finally, the switching unit 340 may connect the converter 330 to the sensing line SL from before the supply of the nth sensing control pulse VSp(n) stops to before the supply of the nth sensing switching pulse VSWp(n) stops.

[0181] That is, the converter 330 may be connected to the sensing line SL in the sensing period SP, and thus, the converter 330 may receive the sensing signal transmitted through the sensing line SL and may convert the sensing signal into the sensing data Sdata.

[0182] Thus, in some embodiments, as described above with reference to Figures 5 to 8 As described above, in the sensing period SP, the third switching control signal SS3 may be supplied to the switching unit 340 so that the connection line CL connected to the sensing line SL is connected to the converter 330 .

[0183] In the above process, when only the charges charged in the nth light emitting device ED(n) included in the nth pixel P(n) are transferred to the converter 330, characteristic changes of the nth light emitting device ED(n) included in the nth pixel P(n) can be accurately measured.

[0184] The period during which the charge charged in the nth light-emitting device ED(n) contained in the nth pixel P(n) is transferred to the converter 330 can be a period during which the nth sensing control transistor Tsw5(n) and the nth sensing switch transistor Tsw6(n) contained in the nth pixel P(n) are turned on, specifically, it can be a period during which the nth sensing control transistor Tsw5(n) is turned on.

[0185] Therefore, when the charges charged in the nth light-emitting device ED(n) are transferred to the converter 330 through the sensing line SL, the n-1th pixel P(n-1) and the n+1th pixel P(n+1) should be electrically disconnected from the sensing line SL so that only the charges charged in the nth light-emitting device ED(n) contained in the nth pixel P(n) are transferred to the converter 330 through the sensing line SL.

[0186] Therefore, in some embodiments, in the present disclosure, as Figure 9As shown, when the nth sensing control pulse VSp(n) is supplied to the nth sensing control line SCL(n) connected to the nth pixel P(n) connected to the nth gate line GLn, a sensing switch turn-off signal for turning off the sensing switch transistors Tsw6(n-1) and Tsw6(n+1) connected to the n-1th sensing switch line SSL(n-1) and the n+1th sensing switch line SSL(n+1) can be supplied to the n-1th sensing switch line SSL(n-1) connected to the n-1th pixel P(n-1) connected to the n-1th gate line GLn-1 and the n+1th sensing switch line SSL(n+1) connected to the n+1th gate line GLn+1.

[0187] In addition, when the nth sensing control pulse VSp(n) is supplied to the nth sensing control line SCL(n), a sensing control turn-off signal for turning off the sensing switch transistors Tsw5(n) and Tsw5(n+1) connected to the n-1th sensing control line SCL(n-1) and the n+1th sensing control line SCL(n+1) can be supplied to the n-1th sensing control line SCL(n-1) connected to the n-1th pixel P(n-1) and the n+1th sensing control line SCL(n+1) connected to the n+1th pixel P(n+1).

[0188] That is to say, if Figure 9 As shown, when the nth sensing control pulse VSp(n) is supplied to the nth pixel P(n), the n-1th sensing switch signal VSW(n-1) and the n+1th sensing switch signal VSW(n+1) may have a high level H, and the n-1th sensing control signal VS(n-1) and the n+1th sensing control signal VS(n+1) may have a high level H.

[0189] Therefore, the n-1th sensing switch transistor Tsw6(n-1) supplying the n-1th sensing switch signal VSW(n-1), the n+1th sensing switch transistor Tsw6(n+1) supplying the n+1th sensing switch signal VSW(n+1), the n-1th sensing control transistor Tsw5(n-1) supplying the n-1th sensing control signal VS(n-1), and the n+1th sensing control transistor Tsw5(n+1) supplying the n+1th sensing control signal VS(n+1) can all be cut off.

[0190] Therefore, charges leaked from the n-1th light emitting device ED(n-1) included in the n-1th pixel P(n-1) and the n+1th light emitting device ED(n+1) included in the n+1th pixel P(n+1) are not transferred to the sensing line SL.

[0191] Therefore, only the charges transferred from the nth light-emitting device ED(n) included in the nth pixel P(n) can be transferred to the converter 330 through the sensing line SL, and thus, in the nth light-emitting device sensing period ESP(n), only the characteristic change of the nth light-emitting device ED(n) included in the nth pixel P(n) can be measured.

[0192] That is, according to the present disclosure described above, characteristic variations of a light emitting device can be accurately measured, and thus, various functions for compensating for characteristic variations of the light emitting device can be accurately performed.

[0193] Third, refer to Figure 9 and Figure 12 A sensing method is described for the n+1th light emitting device ED(n+1) included in the n+1th pixel P(n+1) connected to the n+1th gate line GLn+1. In the following description, the above referenced method will be omitted or briefly described. Figures 9 to 11 The description given is the same or similar to the description.

[0194] First, if Figure 9 As shown, in the light emitting device sensing mode, when the n+1th light emitting device sensing period ESP(n+1) in which sensing is performed on the n+1th light emitting device ED(n+1) included in the n+1th pixel P(n+1) connected to the n+1th gate line GLn+1 starts, the n+1th sensing switch signal VSW(n+1) having a low level L (for example, the n+1th sensing switch pulse VSWp(n+1)) may be supplied to the n+1th sensing switch transistor Tsw6(n+1) included in the n+1th pixel P(n+1).

[0195] In this case, the n+1th sensing switching pulse VSWp(n+1) may be supplied to the n+1th sensing switching transistor Tsw6 (n+1) before the first switching control signal SS1 having a high level is supplied to the data driver 300 .

[0196] Subsequently, after the n+1th sensing switch pulse VSWp(n+1) is supplied to the n+1th sensing switch line SSL(n+1), before the n+1th sensing control pulse VSp(n+1) having a low level L is supplied to the n+1th sensing switch line SSL(n+1), as described above with reference to Figures 5 to 8 As described above, the switch unit 340 and the switch driver 500 may connect the reference voltage transmitter 310 to the sensing line SL.

[0197] Subsequently, the n+1th sensing switch pulse VSWp(n+1) having a low level L may be supplied to the n+1th sensing switch line SSL(n+1), and the first switching control signal SS1 having a high level may be supplied to the switching unit 340, and then, the n+1th sensing control pulse VSp(n+1) having a low level L may be supplied to the n+1th sensing control line SCL(n+1).

[0198] Therefore, the n+1th sensing control transistor Tsw5(n+1) and the n+1th sensing switch transistor Tsw6(n+1) can all be turned on. Figure 12 As shown, the first terminal of the (n+1)th light emitting device ED(n+1) may be electrically connected to the sensing line SL.

[0199] That is, in the charging period CP, the reference voltage transmitter 310 can be connected to the sensing line SL through the first switching control signal SS1 and the second control signal SMUX, and the first terminal of the n+1th light-emitting device ED(n+1) can be electrically connected to the sensing line SL through the n+1th sensing switching pulse VSWp(n+1) and the n+1th sensing control pulse VSp(n+1).

[0200] Therefore, charges may be charged in the first terminal of the n+1th light emitting device ED(n+1) included in the n+1th pixel P(n+1).

[0201] Finally, the switching unit 340 may connect the converter 330 to the sensing line SL from before supply of the n+1th sensing control pulse VSp(n+1) stops to before supply of the n+1th sensing switching pulse VSWp(n+1) stops.

[0202] That is, the converter 330 may be connected to the sensing line SL in the sensing period SP, and thus, the converter 330 may receive the sensing signal transmitted through the sensing line SL and may convert the sensing signal into the sensing data Sdata.

[0203] Thus, in some embodiments, as described above with reference to Figures 5 to 8 As described above, in the sensing period SP, the third switching control signal SS3 may be supplied to the switching unit 340 so that the connection line CL connected to the sensing line SL is connected to the converter 330 .

[0204] In the above process, when only the charges charged in the n+1th light-emitting device ED(n+1) included in the n+1th pixel P(n+1) are transferred to the converter 330, the characteristic change of the n+1th light-emitting device ED(n+1) included in the n+1th pixel P(n+1) can be accurately measured.

[0205] The period during which the charge charged in the n+1th light-emitting device ED(n+1) contained in the n+1th pixel P(n+1) is transferred to the converter 330 can be the period during which the n+1th sensing control transistor Tsw5(n+1) and the n+1th sensing switch transistor Tsw6(n+1) contained in the n+1th pixel P(n+1) are turned on, specifically, it can be the period during which the n+1th sensing control transistor Tsw5(n+1) is turned on.

[0206] Therefore, when the charges charged in the n+1th light-emitting device ED(n+1) are transferred to the converter 330 through the sensing line SL, the n-1th pixel P(n-1) and the nth pixel P(n) should be electrically disconnected from the sensing line SL so that only the charges charged in the n+1th light-emitting device ED(n+1) contained in the n+1th pixel P(n+1) are transferred to the converter 330 through the sensing line SL.

[0207] Therefore, in some embodiments, in the present disclosure, as Figure 9 As shown, when the n+1th sensing control pulse VSp(n+1) is supplied to the n+1th sensing control line SCL(n+1) connected to the n+1th pixel P(n+1) connected to the n+1th gate line GLn+1, the sensing switch turn-off signal for turning off the sensing switch transistors Tsw6(n-1) and Tsw6(n) connected to the n-1th sensing switch line SSL(n-1) and the n-th sensing switch line SSL(n) can be supplied to the n-1th sensing switch line SSL(n-1) connected to the n-1th pixel P(n-1) connected to the n-1th gate line GLn-1 and the n-th sensing switch line SSL(n) connected to the n-1th gate line GLn-1.

[0208] In addition, when the n+1th sensing control pulse VSp(n+1) is supplied to the n+1th sensing control line SCL(n+1), a sensing control turn-off signal for turning off the sensing switch transistors Tsw5(n-1) and Tsw5(n) connected to the n-1th sensing control line SCL(n-1) and the n-1th sensing control line SCL(n-1) may be supplied to the n-1th sensing control line SCL(n-1) connected to the n-1th pixel P(n-1) and the nth sensing control line SCL(n) connected to the nth pixel P(n).

[0209] That is to say, if Figure 9 As shown, when the n+1th sensing control pulse VSp(n+1) is supplied to the n+1th pixel P(n+1), the n-1th sensing switch signal VSW(n-1) and the nth sensing switch signal VSW(n) may have a high level H, and the n-1th sensing control signal VS(n-1) and the nth sensing control signal VS(n) may have a high level H.

[0210] Therefore, the n-1th sensing switch transistor Tsw6(n-1) supplying the n-1th sensing switch signal VSW(n-1), the n-1th sensing switch transistor Tsw6(n) supplying the n-1th sensing switch signal VSW(n), the n-1th sensing control transistor Tsw5(n-1) supplying the n-1th sensing control signal VS(n-1), and the n-1th sensing control transistor Tsw5(n) supplying the n-1th sensing control signal VS(n) can all be cut off.

[0211] Therefore, charges leaked from the n-1th light emitting device ED(n-1) included in the n-1th pixel P(n-1) and the nth light emitting device ED(n) included in the nth pixel P(n) are not transferred to the sensing line SL.

[0212] Therefore, only the charges transferred from the n+1th light-emitting device ED(n+1) included in the n+1th pixel P(n+1) can be transferred to the converter 330 through the sensing line SL, and therefore, in the n+1th light-emitting device sensing period ESP(n+1), only the characteristic change of the n+1th light-emitting device ED(n+1) included in the n+1th pixel P(n+1) can be measured.

[0213] The embodiments of the present disclosure may also be described as follows:

[0214] According to one aspect of the present disclosure, a light-emitting display panel is provided. The light-emitting display panel includes a plurality of pixels, a plurality of gate lines that transmit gate signals to the plurality of pixels, a plurality of data lines that transmit data voltages to the plurality of pixels, and sensing lines connected to a plurality of light-emitting devices respectively included in the plurality of pixels. Each of the plurality of pixels includes: a light-emitting device; a sensing control transistor including a first terminal coupled to a first terminal of the light-emitting device and a gate coupled to the sensing control line; and a sensing switch transistor including a first terminal coupled to a second terminal of the sensing control transistor, a second terminal coupled to the sensing line, and a gate coupled to the sensing switch line.

[0215] The plurality of gate lines and the plurality of data lines may be arranged in different directions. The sensing lines may be arranged in a first direction substantially parallel to the plurality of data lines. The sensing lines may be coupled to sensing switch transistors of the plurality of pixels in the first direction.

[0216] Each of the multiple pixels may also include: a first transistor, which includes a first terminal connected to the corresponding data line and a gate connected to the corresponding gate line; a driving transistor, which includes a first terminal connected to the first voltage supply line; a capacitor, which is connected between the second terminal of the first transistor and the gate of the driving transistor; a second transistor, which includes a first terminal connected to the gate of the driving transistor, a second terminal connected to the second terminal of the driving transistor, and a gate connected to the sensing control line; a third transistor, which includes a first terminal connected to the second terminal of the first transistor, a second terminal connected to the second terminal of the sensing control transistor and the first terminal of the sensing switching transistor, and a gate connected to the light-emitting line; and a fourth transistor, which includes a first terminal connected to the second terminal of the driving transistor, a second terminal connected to the first terminal of the light-emitting device, and a gate connected to the light-emitting line.

[0217] According to another aspect of the present disclosure, a light-emitting display device is provided. The light-emitting display device includes: a light-emitting display panel including a plurality of pixels; a gate driver that supplies a gate signal to a gate line included in the light-emitting display panel; a data driver that supplies a data voltage to a data line included in the light-emitting display panel and converts a sensing signal transmitted through a sensing line included in the light-emitting display panel into sensing data; a controller that stores the sensing data; and a switch driver that connects the data line or the sensing line to the data driver based on a switch driver control signal transmitted from the controller. The sensing line is connected to a plurality of light-emitting devices respectively included in the plurality of pixels. Each of the plurality of pixels includes: a light-emitting device; a sensing control transistor including a first terminal connected to a first terminal of the light-emitting device and a gate connected to the sensing control line; and a sensing switch transistor including a first terminal connected to a second terminal of the sensing control transistor, a second terminal connected to the sensing line, and a gate connected to the sensing switch line.

[0218] The gate lines and the data lines may be disposed in different directions, the sensing lines may be disposed in a first direction substantially parallel to the data lines, and the sensing lines may be coupled to sensing switch transistors of a plurality of pixels in the first direction.

[0219] Each of the multiple pixels may also include: a first transistor, which includes a first terminal connected to the data line and a gate connected to the gate line; a driving transistor, which includes a first terminal connected to the first voltage supply line; a capacitor, which is connected between the second terminal of the first transistor and the gate of the driving transistor; a second transistor, which includes a first terminal connected to the gate of the driving transistor, a second terminal connected to the second terminal of the driving transistor, and a gate connected to the sensing control line; a third transistor, which includes a first terminal connected to the second terminal of the first transistor, a second terminal connected to the second terminal of the sensing control transistor and the first terminal of the sensing switching transistor, and a gate connected to the light-emitting line; and a fourth transistor, which includes a first terminal connected to the second terminal of the driving transistor, a second terminal connected to the first terminal of the light-emitting device, and a gate connected to the light-emitting line.

[0220] The data driver may include: a data voltage generator that generates a data voltage to be transmitted to the data line; a reference voltage transmitter that transmits a reference voltage to the sensing line; a converter that converts a sensing signal transmitted through the sensing line into sensing data and transmits the sensing data to the controller; and a switching unit that connects the switch driver to one of the data voltage generator, the reference voltage transmitter, and the converter.

[0221] The switching unit may include a first switching unit coupling the data line to the data driver, and a second switching unit coupling the sensing line to the data driver.

[0222] The sensing control line and the sensing switch line may be coupled to a gate driver, and a width of a sensing switch pulse supplied to the sensing switch line to turn on the sensing switch transistor may be greater than a width of a sensing control pulse supplied to the sensing control line to turn on the sensing control transistor.

[0223] A sensing switching pulse may be supplied to the sensing switching line, and then a sensing control pulse may be supplied to the sensing control line.

[0224] After the sensing switch pulse is supplied to the sensing switch line and before the sensing control pulse is supplied to the sensing control line, the switching unit and the switch driver may couple the reference voltage transmitter to the sensing line. From before the supply of the sensing control pulse stops until the supply of the sensing switch pulse stops, the switching unit may couple the converter to the sensing line.

[0225] When a sensing control pulse is supplied to the nth sensing control line coupled to the pixel coupled to the nth gate line, a sensing switch turn-off signal for turning off the sensing switch transistors coupled to the n-1th sensing switch line and the n+1th sensing switch line may be supplied to the n-1th sensing switch line coupled to the pixel coupled to the n-1th gate line and the n+1th sensing switch line coupled to the pixel coupled to the n+1th gate line.

[0226] When a sensing control pulse for turning on the sensing control transistor connected to the nth sensing control line is supplied to the nth sensing control line connected to the pixel connected to the nth gate line, a sensing switch turn-off signal for turning off the sensing switch transistors connected to the n-1th sensing switch line and the n+1th sensing switch line may be supplied to the n-1th sensing switch line connected to the pixel connected to the n-1th gate line and the n+1th sensing switch line connected to the pixel connected to the n+1th gate line.

[0227] That is, according to the present disclosure described above, characteristic variations of a light emitting device can be accurately measured, and thus, various functions for compensating for characteristic variations of the light emitting device can be accurately performed.

[0228] According to the embodiments of the present disclosure, in pixels that do not sense characteristic changes of light-emitting devices, current does not leak to the sensing line. Therefore, the degree of characteristic changes of the light-emitting devices being sensed can be accurately sensed, thereby improving the quality of light-emitting display devices.

[0229] The above-mentioned features, structures, and effects of the present disclosure are included in at least one embodiment of the present disclosure, but are not limited to only one embodiment. In addition, those skilled in the art can achieve the features, structures, and effects described in at least one embodiment of the present disclosure by combining or modifying other embodiments. Therefore, the content associated with the combination and modification should be interpreted as within the scope of the present disclosure.

[0230] It will be apparent to those skilled in the art that various modifications and variations can be made in the present disclosure without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is intended to cover modifications and variations of the present disclosure.

[0231] These and other changes can be made to the embodiments in light of the above detailed description. In general, in the following claims, the terms should not be construed to limit the claims to the specific embodiments disclosed in the specification and claims, but should be construed to encompass all possible embodiments and the full scope of equivalents to which the claims are entitled. Therefore, the claims are not limited to what is disclosed.

Claims

1. A light-emitting display panel, comprising: Multiple pixels; a plurality of gate lines, the plurality of gate lines transmitting gate signals to the plurality of pixels; a plurality of data lines, the plurality of data lines transmitting data voltages to the plurality of pixels; as well as a sensing line connected to a plurality of light emitting devices respectively included in the plurality of pixels, Wherein, each of the plurality of pixels comprises: Light emitting device; a sensing control transistor, the sensing control transistor comprising a first terminal coupled to the first terminal of the light emitting device, and a gate coupled to a sensing control line; a sensing switch transistor including a first terminal coupled to the second terminal of the sensing control transistor, a second terminal coupled to the sensing line, and a gate coupled to the sensing switch line; a drive transistor including a first terminal coupled to a first voltage supply line; and a second transistor including a first terminal coupled to the gate of the driving transistor, a second terminal coupled to the second terminal of the driving transistor, and a gate coupled to the sensing control line, When sensing the light emitting device of one pixel among the plurality of pixels, a sensing control signal is applied through the sensing control line of the plurality of pixels to turn on the sensing control transistor of the one pixel and turn off the sensing control transistors of the other pixels, and A sensing switch pulse is applied through the sensing switch lines of the plurality of pixels to turn on the sensing switch transistor of the one pixel and turn off the sensing switch transistors of the other pixels.

2. The light-emitting display panel according to claim 1, wherein: The plurality of gate lines and the plurality of data lines are arranged in different directions, The sensing lines are arranged in a first direction substantially parallel to the plurality of data lines, The sensing line is coupled to the sensing switch transistors of the plurality of pixels in the first direction.

3. The light-emitting display panel according to claim 1, wherein: Each of the plurality of pixels further comprises: a first transistor including a first terminal coupled to a corresponding data line and a gate coupled to a corresponding gate line; a capacitor coupled between the second terminal of the first transistor and the gate of the drive transistor; a third transistor including a first terminal coupled to the second terminal of the first transistor, a second terminal coupled to the second terminal of the sensing control transistor and the first terminal of the sensing switch transistor, and a gate coupled to a light emitting line; and A fourth transistor includes a first terminal coupled to the second terminal of the driving transistor, a second terminal coupled to the first terminal of the light emitting device, and a gate coupled to the light emitting line.

4. A light-emitting display device, comprising: a light-emitting display panel, the light-emitting display panel comprising a plurality of pixels; a gate driver that supplies a gate signal to a gate line included in the light emitting display panel; a data driver that supplies a data voltage to a data line included in the light-emitting display panel and converts a sensing signal transmitted through a sensing line included in the light-emitting display panel into sensing data; a controller, the controller storing the sensed data; as well as a switch driver that couples the data line or the sensing line to the data driver based on a switch driver control signal transmitted from the controller, wherein the sensing line is connected to a plurality of light emitting devices respectively included in the plurality of pixels, and Each of the plurality of pixels comprises: Light emitting device; a sensing control transistor, the sensing control transistor comprising a first terminal coupled to the first terminal of the light emitting device, and a gate coupled to a sensing control line; a sensing switch transistor including a first terminal coupled to the second terminal of the sensing control transistor, a second terminal coupled to the sensing line, and a gate coupled to the sensing switch line; a drive transistor including a first terminal coupled to a first voltage supply line; and a second transistor including a first terminal coupled to the gate of the driving transistor, a second terminal coupled to the second terminal of the driving transistor, and a gate coupled to the sensing control line, When sensing the light emitting device of one pixel among the plurality of pixels, a sensing control signal is applied through the sensing control line of the plurality of pixels to turn on the sensing control transistor of the one pixel and turn off the sensing control transistors of the other pixels, and A sensing switch pulse is applied through the sensing switch lines of the plurality of pixels to turn on the sensing switch transistor of the one pixel and turn off the sensing switch transistors of the other pixels.

5. The light-emitting display device according to claim 4, wherein: The gate line and the data line are arranged in different directions, The sensing line is arranged in a first direction substantially parallel to the data line, The sensing line is coupled to the sensing switch transistors of the plurality of pixels in the first direction.

6. The light-emitting display device according to claim 4, wherein: Each of the plurality of pixels further comprises: a first transistor including a first terminal coupled to the data line and a gate coupled to the gate line; a capacitor coupled between the second terminal of the first transistor and the gate of the drive transistor; a third transistor including a first terminal coupled to the second terminal of the first transistor, a second terminal coupled to the second terminal of the sensing control transistor and the first terminal of the sensing switch transistor, and a gate coupled to a light emitting line; and A fourth transistor includes a first terminal coupled to the second terminal of the driving transistor, a second terminal coupled to the first terminal of the light emitting device, and a gate coupled to the light emitting line.

7. The light-emitting display device according to claim 4, wherein: The data driver comprises: a data voltage generator that generates a data voltage to be transmitted to the data line; a reference voltage transmitter, the reference voltage transmitter transmitting a reference voltage to the sensing line; a converter that converts a sensing signal transmitted through the sensing line into sensing data and transmits the sensing data to the controller; and A switch unit couples the switch driver to one of the data voltage generator, the reference voltage transmitter, and the converter.

8. The light-emitting display device according to claim 7, wherein: The switch unit comprises: a first switching unit coupling the data line to the data driver; and A second switching unit couples the sensing line to the data driver.

9. The light-emitting display device according to claim 4, wherein: The sensing control line and the sensing switch line are coupled to the gate driver, and A width of a sensing switch pulse supplied to the sensing switch line to turn on the sensing switch transistor is greater than a width of a sensing control pulse supplied to the sensing control line to turn on the sensing control transistor.

10. The light emitting display device according to claim 9, wherein: The sensing switch pulse is supplied to the sensing switch line, and the sensing control pulse is supplied to the sensing control line.

11. The light emitting display device according to claim 10, wherein: The data driver comprises: a data voltage generator that generates a data voltage to be transmitted to the data line; a reference voltage transmitter, the reference voltage transmitter transmitting a reference voltage to the sensing line; a converter that converts a sensing signal transmitted through the sensing line into sensing data and transmits the sensing data to the controller; and A switch unit couples the switch driver to one of the data voltage generator, the reference voltage transmitter, and the converter.

12. The light-emitting display device according to claim 11, wherein: After the sensing switch pulse is supplied to the sensing switch line and before the sensing control pulse is supplied to the sensing control line, the switching unit and the switch driver couple the reference voltage transmitter to the sensing line, and The switching unit couples the converter to the sensing line from before supply of the sensing control pulse stops to before supply of the sensing switch pulse stops.

13. The light emitting display device according to claim 12, wherein: When a sensing control pulse is supplied to the nth sensing control line connected to the pixel connected to the nth gate line, a sensing switch turn-off signal for turning off the sensing switch transistors connected to the n-1th sensing switch line and the n+1th sensing switch line is supplied to the n-1th sensing switch line connected to the pixel connected to the n-1th gate line and the n+1th sensing switch line connected to the pixel connected to the n+1th gate line.

14. The light emitting display device according to claim 13, wherein: When a sensing control pulse for turning on a sensing control transistor connected to an nth sensing control line is supplied to the nth sensing control line connected to a pixel connected to an nth gate line, a sensing switch turn-off signal for turning off sensing switch transistors connected to an n-1th sensing switch line and an n+1th sensing switch line is supplied to the n-1th sensing switch line connected to a pixel connected to an n-1th gate line and the n+1th sensing switch line connected to a pixel connected to an n+1th gate line.

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