Touch display panel and display device

Abstract

The invention discloses a touch display panel and a display device. The touch display panel comprises a substrate, a display function layer and a touch function layer, wherein the display function layer and the touch function layer are located on one side of the substrate; the display function layer comprises a plurality of display units arranged in an array; the display unit comprises a first display electrode; the touch function layer comprises a plurality of touch units; the touch unit comprises a first touch electrode; the working process of the touch display panel at least comprises a touch stage; in the touch control stage, the first display electrode of each display unit receives a first touch control signal, and each first touch control electrode receives a second touch control signal. Both the first touch signal and the second touch signal comprise alternating current signals. According to the technical scheme, the display effect and the touch sensitivity of the touch display panel can be improved.

Description

TECHNICAL FIELD

[0001] Embodiments of the present disclosure relate to the technical field of display, and in particular, to a touch display panel and a display device. BACKGROUND

[0002] With the development of display technology, more and more display products integrate display and touch in the same display panel. The integrated structure of touch unit and display unit includes in-cell and on-cell. In-cell means that the touch unit is integrated into the display panel, and on-cell means that the touch unit is formed in a separate touch panel, and the touch display panel is formed by assembling the touch panel and the display panel together.

[0003] However, in the in-cell touch display panel, the touch electrode of the touch unit and the display electrode of the display unit form a coupling capacitor, which causes mutual interference between the touch signal of the touch electrode and the display signal of the display electrode, and further affects the display effect and touch sensitivity of the touch display panel. SUMMARY

[0004] The present disclosure provides a touch display panel and a display device to improve the display effect and touch sensitivity of the touch display panel.

[0005] In a first aspect, the present disclosure provides a touch display panel, comprising: a substrate, and a display function layer and a touch function layer located on one side of the substrate;

[0006] The display function layer comprises a plurality of display units arranged in an array; the display unit comprises a first display electrode;

[0007] The touch function layer comprises a plurality of touch units; the touch unit comprises a first touch electrode;

[0008] The working process of the touch display panel at least comprises a touch phase;

[0009] In the touch phase, the first display electrode of each display unit receives a first touch signal, and the first touch electrode of each touch unit receives a second touch signal respectively; the first touch signal and the second touch signal both comprise an alternating current signal.

[0010] In a second aspect, the present disclosure further provides a display device, comprising the above-mentioned touch function display panel.

[0011] The technical scheme of the present disclosure is characterized in that a display function layer and a touch function layer are arranged on one side of a substrate, the display function layer comprises a plurality of display units arranged in an array, and the touch function layer comprises a plurality of touch units, so that the display units can be controlled to display, the picture display requirement of the touch display panel is met, and the touch function is realized through the touch units, the interactive requirement of the touch display panel is met. Meanwhile, in the touch stage of the touch display panel, the first display electrodes of the display units receive alternating first touch signals, and the first touch electrodes of the touch units receive alternating second touch signals, that is, in the touch stage, the first display electrodes and the first touch electrodes both receive alternating signals, so that the signal type on the first display electrodes is consistent with the signal type on the first touch electrodes, the signal coupled from the first display electrodes to the first touch electrodes is consistent, and the signal coupled from the first touch electrodes to the first display electrodes is consistent, so as to improve the touch sensitivity of the touch display panel, and improve the display effect of the touch display panel. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a top view structural schematic diagram of a touch display panel provided by an embodiment of the present disclosure;

[0013] Figure 2 is a film layer structural schematic diagram of a touch display panel provided by an embodiment of the present disclosure;

[0014] Figure 3 is a structural schematic diagram of a display unit provided by an embodiment of the present disclosure;

[0015] Figure 4 is another film layer structural schematic diagram of a touch display panel provided by an embodiment of the present disclosure;

[0016] Figure 5 is still another film layer structural schematic diagram of a touch display panel provided by an embodiment of the present disclosure;

[0017] Figure 6 is still another film layer structural schematic diagram of a touch display panel provided by an embodiment of the present disclosure;

[0018] Figure 7 is another top view structural schematic diagram of a touch display panel provided by an embodiment of the present disclosure;

[0019] Figure 8 is still another top view structural schematic diagram of a touch display panel provided by an embodiment of the present disclosure;

[0020] Figure 9 is a schematic diagram of a film layer structure of a touch display panel provided by an embodiment of the present disclosure;

[0021] Figure 10 is a schematic diagram of a top view structure of a touch display panel provided by an embodiment of the present disclosure;

[0022] Figure 11 is a schematic diagram of a driving timing of a touch display panel provided by an embodiment of the present disclosure;

[0023] Figure 12 is a schematic diagram of a driving timing of a touch display panel provided by an embodiment of the present disclosure;

[0024] Figure 13 is a schematic diagram of a driving timing of a touch display panel provided by an embodiment of the present disclosure;

[0025] Figure 14 is a schematic diagram of a driving timing of a touch display panel provided by an embodiment of the present disclosure;

[0026] Figure 15 is a schematic diagram of a driving timing of a touch display panel provided by an embodiment of the present disclosure;

[0027] Figure 16 is a schematic diagram of a driving timing of a touch display panel provided by an embodiment of the present disclosure;

[0028] Figure 17 is a schematic diagram of a top view structure of a touch display panel provided by an embodiment of the present disclosure;

[0029] Figure 18 is a schematic diagram of a driving timing of a touch display panel provided by an embodiment of the present disclosure;

[0030] Figure 19 is a schematic diagram of a top view structure of a touch display panel provided by an embodiment of the present disclosure;

[0031] Figure 20 is a schematic diagram of a top view structure of a touch display panel provided by an embodiment of the present disclosure;

[0032] Figure 21 is a schematic diagram of a driving timing of a touch display panel provided by an embodiment of the present disclosure;

[0033] Figure 22 is a schematic diagram of a driving timing of a touch display panel provided by an embodiment of the present disclosure;

[0034] Figure 23 is a schematic diagram of a driving timing of a touch display panel provided by an embodiment of the present disclosure;

[0035] Figure 24 is a driving timing diagram of a touch display panel provided by an embodiment of the present disclosure;

[0036] Figure 25 is a driving timing diagram of a touch display panel provided by an embodiment of the present disclosure;

[0037] Figure 26 is a top view structural diagram of a touch display panel provided by an embodiment of the present disclosure;

[0038] Figure 27 is a top view structural diagram of a touch display panel provided by an embodiment of the present disclosure;

[0039] Figure 28 is a top view structural diagram of a touch display panel provided by an embodiment of the present disclosure;

[0040] Figure 29 is a driving timing diagram of a touch display panel provided by an embodiment of the present disclosure;

[0041] Figure 30 is a structural diagram of a display device provided by an embodiment of the present disclosure;

[0042] Figure 31 is a structural diagram of a display device provided by an embodiment of the present disclosure;

[0043] Figure 32 is a structural diagram of a display device provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0044] In order to make the objectives, technical solutions and advantages of the present disclosure clearer, the following will combine the drawings in the embodiments of the present disclosure, and describe the technical solutions of the present disclosure completely and clearly through specific embodiments. Obviously, the described embodiments are a part of the embodiments of the present disclosure, rather than all the embodiments of the present disclosure. Various modifications and changes can be made in the present disclosure without departing from the spirit or scope of the present disclosure, which will be apparent to those skilled in the art. Therefore, the present disclosure is intended to cover the modifications and changes of the present disclosure falling within the scope of the corresponding claims (the technical solutions claimed to be protected) and their equivalents.

[0045] Also, the terms "first", "second", and similar terms in the embodiments of the present disclosure do not denote any order, quantity, or importance, but are used to distinguish different components. Also, the terms "one", "a", or "the" do not denote a quantity of any number, but denote the existence of at least one. The terms "include", "comprise", and similar terms mean that the elements or objects before the terms encompass the elements or objects listed after the terms and equivalents thereof, and do not exclude other elements or objects. The terms "connected" or "linked" or similar terms do not limit to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships can also be changed accordingly. In addition, the descriptions of the same, equal, and the like in the embodiments of the present disclosure do not mean that the two objects are exactly equal in size and exactly the same in shape, but allow them to be substantially the same and substantially equal within a certain error range.

[0046] It should be noted that the embodiments provided by the embodiments of the present disclosure can be combined with each other without contradiction.

[0047] The touch display panel generally includes a touch unit and a display unit. The display unit can include a display electrode. By providing a display signal to the display electrode, the display unit can be controlled to display and emit light, so that the touch display panel presents a corresponding display picture. The touch unit can include a self-capacitive touch electrode or a mutual-capacitive touch electrode. A self-capacitive touch electrode forms a capacitor with the ground, or a touch sensing electrode in a mutual-capacitive touch electrode forms a capacitor with a touch driving electrode. When a finger or a stylus touches the touch surface of the touch display panel, the capacitance of the touch unit changes. By the amount of change in the capacitance, the touch position can be detected, so that the touch display panel realizes human-computer interaction.

[0048] However, for the case where the touch unit is embedded in the display panel to constitute the touch display panel, the distance between the touch electrode of the touch unit and the display electrode in the display unit in the touch display panel is close, so that a capacitor is also formed between the touch electrode and the display electrode. At this time, due to the coupling effect of the capacitor, the signal of the display electrode is coupled to the touch electrode, affecting the accuracy of the signal on the touch electrode, thereby affecting the accuracy and sensitivity of the touch position detection when the touch position is detected. At the same time, in the touch stage, the touch signal provided to the touch electrode is also coupled to the display electrode, thereby affecting the accuracy of the signal on the display electrode, and further affecting the display and light emitting state of the display unit, and affecting the display effect of the touch display panel.

[0049] To solve the above technical problems, the touch display panel provided by the embodiment of the present disclosure includes: a substrate, and a display function layer and a touch function layer located on one side of the substrate; the display function layer includes a plurality of display units arranged in an array; the display unit includes a first display electrode; the touch function layer includes a plurality of touch units; the touch unit includes a first touch electrode; the working process of the touch display panel at least includes a touch stage; in the touch stage, the first display electrode of each display unit receives a first touch signal, and each first touch electrode receives a second touch signal; the first touch signal and the second touch signal both include an alternating current signal.

[0050] By adopting the above technical solution, the display function layer and the touch function layer are arranged on one side of the substrate, the display function layer includes a plurality of display units arranged in an array, and the touch function layer includes a plurality of touch units, so that the display units can be controlled to display, the picture display requirements of the touch display panel are met, and the touch function is realized through the touch units, and the interaction requirements of the touch display panel are met. Meanwhile, in the touch stage of the touch display panel, the first display electrode of each display unit receives an alternating current first touch signal, and the first touch electrode of each touch unit receives an alternating current second touch signal, that is, the first display electrode and the first touch electrode both receive an alternating current signal in the touch stage, so that the signal type on the first display electrode is consistent with the signal type on the first touch electrode, the signal coupled from the first display electrode to the first touch electrode is consistent, and the signal coupled from the first touch electrode to the first display electrode is consistent, so as to improve the touch sensitivity of the touch display panel, and improve the display effect of the touch display panel.

[0051] The above is the core idea of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present disclosure. The technical solutions in the embodiments of the present disclosure will be described clearly and completely in combination with the drawings in the embodiments of the present disclosure.

[0052] Figure 1 is a top view structural schematic diagram of a touch display panel provided by the embodiment of the present disclosure, Figure 2 is a film layer structural schematic diagram of a touch display panel provided by the embodiment of the present disclosure, referring to Figure 1 and Figure 2The touch display panel 100 comprises a substrate 10 and a display function layer 20 located on one side of the substrate 10; the display function layer 20 comprises a plurality of display units 201 arranged in an array; the display unit 201 comprises a first display electrode 21.

[0053] The substrate 10 can be a rigid substrate or a flexible substrate. When the substrate 10 is a rigid substrate, the substrate 10 can comprise a glass substrate, etc. When the substrate is a flexible substrate, the substrate 10 can comprise a flexible organic layer or an ultrathin glass layer, etc. The specific structure of the substrate 10 can be designed according to actual needs, and the embodiments of the present disclosure do not make specific limitations in this regard.

[0054] It can be understood that the touch display panel 100 can be a self-luminous display panel or a non-self-luminous display panel, and the specific design can be made according to actual needs, and the embodiments of the present disclosure do not make specific limitations in this regard.

[0055] In combination with reference Figure 1 and Figure 3When the touch display panel 100 is a self-luminous display panel, the touch display panel 100 may, for example, include an OLED display panel, a Micro LED display panel, or a Mini LED display panel, and the like. At this time, the display unit 201 may include a pixel circuit P and a light emitting element D, and the pixel circuit P may be electrically connected to the light emitting element D to drive the light emitting element D to emit light. The pixel circuit P may include a typical 7T1C pixel circuit, i.e., the pixel circuit may include a driving transistor M1, a reset transistor M2, a data writing transistor M3, a threshold compensation transistor M4, an initialization transistor M5, a first light emitting control transistor M6, a second light emitting control transistor M7, and a storage capacitor Cst. The reset transistor M2 may be controlled to be turned on in a reset stage by a first gate signal SN1, so that a reset signal Vref1 can reset the gate of the driving transistor M1. The data writing transistor M3 may be controlled to be turned on at least in a data writing stage by a second gate signal SP, and the threshold compensation transistor M4 may be controlled to be turned on at least in a threshold compensation stage by a third gate signal SN2, so that a data signal Vdata can be written to the gate of the driving transistor M1, and the threshold voltage of the driving transistor M1 can be written to the gate of the driving transistor M1, and the data signal Vdata and the threshold voltage of the driving transistor M1 can be stored in the storage capacitor Cst. The initialization transistor M6 may be controlled to be turned on at least in an initialization stage by a fourth gate signal SP*, so that an initialization signal Vref2 can be transmitted to the anode of the light emitting element D to initialize the anode of the light emitting element D. The first light emitting control transistor M6 and the second light emitting control transistor M7 may be controlled to be turned on at least in a light emitting stage by a light emitting control signal EM, at this time, a conductive path is formed between a positive power supply signal PVDD and a negative power supply signal PVEE, so that the driving transistor M1 generates a driving current according to the gate signal thereof, and provides the driving current to the light emitting element D to drive the light emitting element D to emit light.

[0056] It should be noted that the above only exemplarily takes the pixel circuit P including a typical 7T1C pixel circuit as an example for description, and the pixel circuit in the embodiments of the present disclosure may also include other forms of pixel circuits, for example, an 8T1C pixel circuit (including eight transistors and one storage capacitor), or a 14T2C pixel circuit (including fourteen transistors and two capacitors), and the like. The specific design may be made according to actual needs, and the embodiments of the present disclosure do not make specific limitations on this premise that the core invention points of the embodiments of the present disclosure can be implemented.

[0057] Continuing to refer to Figure 3The light-emitting element D can include an OLED, a Micro LED, or a Mini LED, and the like, and can be designed according to actual needs. In an example where the light-emitting element D includes an OLED, the light-emitting element D can include an anode, a cathode, and a light-emitting layer between the anode and the cathode, and the first display electrode can be one of the anode and the cathode of the light-emitting element D.

[0058] In an optional embodiment, the display function layer 20 can include a driving circuit layer 20P and a light-emitting function layer 20D located on a side of the driving circuit layer 20P away from the substrate 10. Figure 1 and Figure 4 As shown in FIG. 1, the display function layer 20 can include a driving circuit layer 20P and a light-emitting function layer 20D located on a side of the driving circuit layer 20P away from the substrate 10. The driving circuit layer 20P includes a plurality of pixel circuits P arranged in an array. The light-emitting function layer 20D includes a plurality of light-emitting elements D. The light-emitting element D includes the first display electrode 21, the second display electrode 22, and a light-emitting layer 23 between the first display electrode 21 and the second display electrode 22. The pixel circuit P is electrically connected to the second display electrode 22. The pixel circuit P and the light-emitting element D constitute a display unit 201.

[0059] It can be understood that, Figure 4 In the example shown in FIG. 1, the pixel circuit P is only exemplarily shown in a structure of one transistor, and the structure of the pixel circuit P is not limited thereto. That is, the pixel circuit P can also include other active and / or passive devices. The active device can include a three-terminal or four-terminal device such as a transistor, and the passive device can include a two-terminal device such as a capacitor, a resistor, and an inductor. The pixel circuit P can be designed according to actual needs, and the embodiments of the present disclosure do not make specific limitations thereto.

[0060] The driving circuit layer 20P includes a plurality of pixel circuits P arranged in an array. Each device in the pixel circuit P is composed of a corresponding conductive structure, so that the driving circuit layer 20P can include a semiconductor layer 24, a first conductive layer 25, a second conductive layer 26, an insulating layer 210 between the semiconductor layer 24 and the first conductive layer 25, an insulating layer 220 between the first conductive layer 25 and the second conductive layer 26, a planarization layer 230 covering the second conductive layer 26, and the like. The semiconductor layer 24 can include an active layer of a transistor and the like, the first conductive layer 25 can include a gate of a transistor and / or a plate of a capacitor and the like, and the second conductive layer 26 can include a signal line connected to a transistor and the like. By providing insulating and spaced conductive layers in the driving circuit layer 20P, and patterning each conductive layer to form a conductive structure, the conductive structures between each conductive layer are connected to each other to constitute the pixel circuit P.

[0061] The light-emitting functional layer 20D includes a plurality of light-emitting elements D. One of the first display electrode 21 and the second display electrode 22 of the light-emitting element D can be the anode of the light-emitting element D, and the other can be the cathode of the light-emitting element D. For example, the first display electrode 21 can be the cathode of the light-emitting element D, and the second display electrode 22 can be the anode of the light-emitting element D. That is, the electrode on the side of the light-emitting element D farther from the base substrate 10 can be the first display electrode 21. Because the pixel circuit P is electrically connected to the second display electrode 22 of the light-emitting element D, the pixel circuit P can provide a driving current signal to the second display electrode 22 of the light-emitting element D, and the first display electrode 21 of the light-emitting element D can receive a power supply signal. Under the combined action of the power supply signal and the driving signal provided by the pixel circuit P, photons in the light-emitting layer 23 of the light-emitting element D can be excited, causing the light-emitting element D to emit light.

[0062] In addition, the touch display panel 100 may further include an encapsulation layer 250 covering the display function layer 20 . The encapsulation layer 250 may protect the light emitting element D and the pixel circuit P in the display function layer 20 to a certain extent.

[0063] In other optional embodiments, such as Figure 5As shown, the touch display panel 100 can also be a non-self-luminous display panel, for example, when the touch display panel 100 is a liquid crystal display panel, the touch display panel 100 can include an array substrate, a counter substrate 40, and a liquid crystal layer 50 between the array substrate and the counter substrate 40. The array substrate can include a substrate 10, a driving circuit layer 20A on one side of the substrate 10, a second display electrode layer 22A, a first display electrode layer 21A, and an insulating layer 260 between the second display electrode layer 21A and the first display electrode layer 22A, an insulating layer 270 covering the first display electrode layer 21A, etc. The driving circuit layer 20A can include a plurality of driving circuits arranged in an array, the driving circuits can be composed of active devices and / or passive devices, for example, the driving circuits can include transistors. The driving circuit layer 20A can include a semiconductor layer 24, a first conductive layer 25, a second conductive layer 26, and an insulating layer 210 between the semiconductor layer 24 and the first conductive layer 25, an insulating layer 220 between the first conductive layer 25 and the second conductive layer 26, and a planarization layer 230 covering the second conductive layer 26, etc. The semiconductor layer 24 can include an active layer of a transistor, the first conductive layer 25 can include a gate of the transistor, and the second conductive layer 26 can include a signal line connected to the transistor. The first display electrode layer 21A can include a common electrode, and the second display electrode layer 22A can include a pixel electrode, the pixel electrode can be electrically connected to the driving circuit, so that the driving circuit can provide a driving signal to the pixel electrode, and the common electrode can receive a common voltage signal, so that a voltage is generated between the pixel electrode and the common electrode to drive the liquid crystal molecules in the liquid crystal layer 50 to twist, so that light can pass through the liquid crystal layer 50 to reach the counter substrate 40, thereby enabling the touch display panel 100 to display and emit light.

[0064] When the touch display panel 100 is a liquid crystal display panel, the display unit 201 can include a driving circuit, a pixel electrode, a common electrode, a liquid crystal layer, and a color resistance structure disposed in the counter substrate 40, etc. At this time, one of the pixel electrode and the common electrode can be the first display electrode 21 of the display unit 201, and the other can be the second display electrode 22. In an exemplary embodiment, the electrode farther away from the substrate 10 on the side of the display unit 201 can be the first display electrode 21, for example, the common electrode disposed on the common layer 21A can be the first display electrode 21.

[0065] It should be noted that the above only exemplarily illustrates the structure of the display function layer of the touch display panel provided by the embodiments of the present disclosure, and the structure of the touch display panel in the embodiments of the present disclosure is not limited thereto, and can be designed according to actual needs. For ease of description, without special limitation, the technical solutions of the embodiments of the present disclosure are exemplarily illustrated with the display unit of the touch display panel including the pixel circuit and the light emitting element.

[0066] With reference to Figure 1 and Figure 2 , the touch display panel 100 can further include a touch function layer 30 located on one side of the substrate 10. The touch function layer 30 includes a plurality of touch units 301; the touch unit 301 includes a first touch electrode 31. At this time, the working process of the touch display panel 100 at least includes a touch phase, and in the touch phase, the first touch electrode 31 of each touch unit 301 respectively receives a second touch signal VTX2.

[0067] It can be understood that the touch unit 301 can be a self-capacitive touch unit or a mutual-capacitive touch unit, and can be designed according to actual needs, and the embodiments of the present disclosure do not make specific limitations thereto.

[0068] In an optional embodiment, when the touch unit 301 is a self-capacitive touch unit, the first touch electrode 31 can form a touch capacitor with the ground, so that in the touch phase, the second touch signal VTX2 is provided to the first touch electrode 31, and the touch sensing signal VRX fed back by the first touch electrode 31 is received, and through the second touch signal VTX2 and the touch sensing signal VRX, the size of the capacitance or the capacitance change between each first touch electrode 31 and the ground can be determined, and according to the capacitance size or the capacitance change, the touch position of the touch object such as a finger can be determined, and touch detection is realized.

[0069] In another optional embodiment, in combination with reference to Figure 6 to Figure 10 , the touch unit 301 can also be a mutual-capacitive touch unit, at this time, the touch unit 301 can include a first touch electrode 31 and a second touch electrode 32; in the touch phase, the first touch electrode 31 of the touch unit 301 receives a first touch signal, and the second touch electrode 32 of each touch unit 301 outputs a touch sensing signal in turn.

[0070] It can be understood that the first touch electrode 31 and the second touch electrode 32 can be located on the same film layer or different film layers, and can be designed according to actual needs, and the embodiments of the present disclosure do not make specific limitations thereto.

[0071] In a feasible embodiment, in combination with reference to Figure 6 to Figure 8The touch function layer 30 can include a first touch electrode layer, a second touch electrode layer, and an insulating layer 310 between the first touch electrode layer and the second touch electrode layer. The first touch electrode layer can include the first touch electrode 31, and the second touch electrode layer can include the second touch electrode 32. The first touch electrode 31 and the second touch electrode 32 can be in a block or strip structure. In a direction perpendicular to the plane on which the substrate 10 is located, the first touch electrode 31 and the second touch electrode 32 overlap to form a capacitance of a touch unit 301. In a touch phase, the capacitance formed by the first touch electrode 31 and the second touch electrode 32 can be charged by providing a second touch signal to the first touch electrode 31. The capacitance between the first touch electrode 31 and the second touch electrode 32 can be determined by receiving a touch sensing signal output by the second touch electrode 32, so that the touch position of a touch object such as a finger in the touch surface of the touch display panel 100 can be determined, and touch detection can be achieved.

[0072] In other possible embodiments, with reference to Figure 9 and Figure 10 The first touch electrode 31 and the second touch electrode 32 can also be arranged in the same layer. In this case, the touch function layer 30 can include only one touch electrode layer, which includes the first touch electrode 31 and the second touch electrode 32. The first touch electrode 31 and the second touch electrode 32 are arranged alternately in the touch electrode layer, so that the second touch electrode 32 and the first touch electrode 31 around the second touch electrode 32 can form a capacitance. The capacitance formed by the first touch electrode 31 and the second touch electrode 32 can be charged, and the capacitance between the first touch electrode 31 and the second touch electrode 32 can be determined, so that touch detection can also be achieved.

[0073] It should be noted that the structure of the touch unit 301 is only exemplarily described above, and the structure of the touch unit in the embodiments of the present disclosure is not limited thereto. The structure of the touch unit can be designed according to actual needs, and the embodiments of the present disclosure do not make specific limitations thereon. For ease of description, the technical solutions of the embodiments of the present disclosure are exemplarily described with the touch unit including the first touch electrode and the second touch electrode arranged in different film layers, and the first touch electrode and the second touch electrode being in a strip structure, without special limitations.

[0074] It can be understood that the touch function layer 30 can be located on the side of the display function layer 20 away from the substrate substrate, and because the first display electrode 21 in the display function layer 20 is the electrode farthest from the substrate substrate 10, the first touch electrode 31 and / or the second touch electrode 32 in the touch function layer 30 have a closer distance with the first display electrode 21 in the display function layer 20. In this way, in the direction perpendicular to the plane where the substrate substrate 10 is located, when the first touch electrode 31 and / or the second touch electrode 32 overlap with the first display electrode 21, a coupling capacitor will be formed at the position where the first touch electrode 31 and / or the second touch electrode 32 overlap with the first display electrode 21.

[0075] In the prior art, in the touch phase, the first display electrode receives a corresponding display signal, which is usually a direct current signal different from the touch signal. Due to the coupling effect of the coupling capacitor formed by the first touch electrode and / or the second touch electrode and the first display electrode, the display signal of the first display electrode will be coupled to the first touch electrode and / or the second touch electrode, thereby affecting the accuracy of the signal on the first touch electrode and / or the second touch electrode, generating touch noise, and further affecting the touch accuracy; at the same time, since the touch signal received by the first touch electrode is usually a square wave signal, the square wave signal will also be coupled to the first display electrode, so that the signal on the first display electrode will change with the square wave signal, thereby generating display water ripples, affecting the display effect of the touch display panel.

[0076] In the embodiments of the present disclosure, with reference to Figure 1 、 Figure 6 、 Figure 8 and Figure 11 , in the touch phase Tt, the first touch electrode 31 of each touch unit 201 receives the second touch signal VTX2 at the same time, and the first display electrode 21 of each display unit 201 receives the first touch signal VTX1, and the first touch signal VTX1 and the second touch signal VTX2 both include alternating current signals.

[0077] In the touch stage Tt, the first touch signal VTX1 and the second touch signal VTX2 both include alternating current signals. It can be understood that the amplitudes of the first touch signal VTX1 and the second touch signal VTX2 can change periodically, and the amplitude change periods of the first touch signal VTX1 and the second touch signal VTX2 can be the same or different, which can be designed according to actual needs. Taking the case that the amplitude change periods of the first touch signal VTX1 and the second touch signal VTX2 are the same as an example, the amplitude change period can be H. In the amplitude change period, the first touch signal VTX1 can include a first amplitude V11 and a second amplitude V12, the second touch signal VTX2 can include a third amplitude V21 and a fourth amplitude V22, and the absolute value of the first amplitude V11 can be greater than the absolute value of the second amplitude V12, and the absolute value of the third amplitude V21 can be greater than the absolute value of the fourth amplitude V22. It can be understood that the absolute value of the first amplitude V11 and the absolute value of the third amplitude V21 can be the same or different, and the absolute value of the second amplitude V12 and the absolute value of the fourth amplitude V22 can be the same or different, which can be designed according to actual needs, and the embodiments of the present disclosure do not make specific limitations.

[0078] Specifically, in the touch stage, the first display electrode 21 receives the alternating current first touch signal VTX1, which can be coupled to the first touch electrode 31 and / or the second touch electrode 32 through the coupling of the first display electrode 21, the first touch electrode 31 and / or the second touch electrode 32, so that the signal coupled to the first touch electrode 31 and / or the second touch electrode 32 is the alternating current signal consistent with the second touch signal VTX1, thereby reducing the influence of the signal of the first display electrode 21 on the signal on the first touch electrode 31 and / or the second touch electrode 32, and further facilitating the reduction of touch noise and the improvement of touch detection sensitivity and accuracy. When the first touch signal VTX1 received by the first display electrode 21 is an alternating current signal, a signal opposite to the first touch signal VTX1 can be provided to the second display electrode 22 of the display unit 201, so that the signals of the first display electrode 21 and the second display electrode 22 in the display unit 201 can be offset to each other, and the display lighting effect of the display unit 201 is ensured. Alternatively, the first touch signal VTX1 received by the first display electrode 21 can be an alternating current signal with a small amplitude change amount, for example, the first amplitude V11 and the second amplitude V12 of the first touch signal VTX1 have a small difference, so that the influence of the first touch signal VTX1 on the display lighting effect of the display unit 201 can be ignored, and the display lighting effect of the display unit 201 is ensured.

[0079] The embodiment improves the touch sensitivity of the touch display panel and improves the display effect of the touch display panel by receiving the first touch signal of the first display electrode of each display unit and the second touch signal of the first touch electrode of each touch unit in the touch stage of the touch display panel, so that the signal type on the first display electrode is consistent with the signal type on the first touch electrode, and the signal coupled from the first display electrode to the first touch electrode and the signal coupled from the first touch electrode to the first display electrode are consistent.

[0080] On the basis of the above-mentioned embodiments, optionally, in combination with reference Figure 1 、 Figure 8 and Figure 11 , the working process of the touch display panel 100 further includes a display stage Td; in the display stage Td, the first display electrode 21 of the display unit 201 receives a first power signal V10; the first power signal V10 is a direct current signal.

[0081] For the case that the touch display panel 100 is a self-luminous display panel, the display stage of the touch display panel 100 can be understood as: a time period in which the pixel circuit in the display unit 201 normally works and drives the light emitting element to display and emit light. The display time of one frame of picture of the touch display panel 100 can include one or more display stages. When the display time of one frame of picture of the touch display panel 100 includes multiple display stages, the pixel circuit in multiple rows of display units 201 can be controlled to drive the light emitting element to display and emit light in each display stage. The touch stage Tt can be located between two adjacent display stages, at this time, the touch stage Tt can be located in the display time of one frame of picture, and / or located between the display time of two adjacent frames of picture, which can be designed according to actual needs, and the present embodiment does not make specific limitation thereto.

[0082] Specifically, the first display electrode 21 can be the cathode or anode of the light emitting element, at this time, the first power signal V10 can be a negative power signal or a positive power signal. By making the first display electrode 21 receive the direct current first power signal V10, the stable light emission of the light emitting element in the display stage can be ensured, and the alternating current signal provided to the first display electrode 21 is prevented, so that the signal light of the first display electrode 21 fluctuates, and display water ripples appear, thereby facilitating the improvement of the display effect of the touch display panel.

[0083] It can be understood that when the first power signal V10 is a positive power signal, the first power signal V1 can be a high-level signal greater than 0V, so that the first power signal V10 can be a power signal of positive polarity. When the first power signal V10 is a negative power signal, the first power signal V10 can be a low-level signal less than or equal to 0V, so that the first power signal V10 can be a power signal of negative polarity. The specific polarity selection of the first power signal V10 can be designed according to actual needs, and the embodiments of the present disclosure do not make specific restrictions on this. For ease of description, in the absence of special restrictions, the embodiments of the present disclosure all take the first display electrode 21 as the cathode of the light-emitting element and the first power signal V10 as a power signal of negative polarity as an example to exemplify the technical solutions of the embodiments of the present disclosure.

[0084] In addition, it can also be understood that the polarity of the first power signal received by the first display electrode in the display stage and the first touch signal received by the first display electrode in the touch stage can be the same or different, and can be specifically designed according to actual needs. The embodiments of the present disclosure do not make specific limitations on this.

[0085] In an optional embodiment, if Figure 12 or Figure 13 As shown, the first power signal V10 has the same polarity as the first touch signal. In this case, if the first power signal V10 can be a negative power signal, that is, the first power signal V10 is less than or equal to 0, then the first touch signal VTX1 is also a negative power signal, and the first amplitude V11 and the second amplitude V12 of the first touch signal VTX1 can both be less than or equal to 0, or the first amplitude V11 can be greater than 0, and the second amplitude V12 can be less than or equal to 0. In this way, when entering the touch stage Tt from the display stage Td, the signal provided to the first display electrode will not have a large jump, thereby avoiding the situation where the signal provided to the first display electrode has a large instantaneous fluctuation due to a large jump, which affects the display brightness of the display unit. This can help improve the display brightness accuracy of the display unit and further enhance the display effect of the touch display panel. In addition, by making the polarity of the first power signal V10 received by the first display electrode in the display stage the same as the polarity of the first touch signal VTX1 received by the first display electrode in the touch stage, it is possible to prevent power consumption waste caused by charging or discharging the first display electrode due to signal jumps, thereby helping to reduce the overall power consumption of the touch display panel.

[0086] Based on the above embodiment, when the polarity of the first power signal V10 received by the first display electrode in the display stage is the same as the polarity of the first touch signal VTX1 received by the first display electrode in the touch stage, and the first touch signal VTX1 is a square wave signal, the first amplitude V11 or the second amplitude V12 of the first touch signal TX1 can be the same as the amplitude of the first power signal V10, so as to ensure that the signal received by the first display electrode in the touch stage can also ensure that the light-emitting element accurately displays light.

[0087] It should be noted that the above is only an illustrative description of the polarity of the first power signal received by the first display electrode in the display stage and the first touch signal received in the touch stage. In the embodiment of the present disclosure, the polarity of the signal received by the first touch electrode in the display stage and the polarity of the second touch signal received by the first touch electrode in the touch stage can also be the same or different. The specific design can be based on actual needs, and the embodiment of the present disclosure does not make specific limitations on this.

[0088] In an alternative embodiment, reference Figure 11 to Figure 13 , the first touch electrode can receive the second power signal V20 or be in a suspended state during the display stage Td.

[0089] Among them, when the first touch electrode receives the second power signal V20 in the display stage Td, the second power signal 20 can be a DC signal, thereby preventing the signal received by the first touch electrode from fluctuating and affecting the signal on the first display electrode, which is beneficial to improving the display accuracy of the display unit.

[0090] As a feasible embodiment, continue to refer to Figure 11 to Figure 13 The second power signal V20 received by the first touch electrode in the display stage Td can be opposite in polarity to the second touch signal VTX2 received by it in the touch stage Tt, thereby ensuring that the touch signal received by the first touch electrode jumps, and through the coupling effect of the capacitor in the touch unit, the coupling amount of the second touch electrode signal coupled to the touch unit can be large, thereby achieving accurate and rapid charging of the capacitor of the touch unit.

[0091] In other possible embodiments, Figure 14 As shown, the second power signal V20 received by the first touch electrode in the display stage Td can also have the same polarity as the second touch signal VTX2 received in the touch stage Tt, thereby reducing the power consumption caused by signal jumps and lowering the overall power consumption of the touch display panel.

[0092] For the convenience of description, without special limitation, the technical solutions of the embodiments of the present disclosure are exemplarily described by taking the example that the polarity of the signal received by the first touch electrode in the display stage is opposite to the polarity of the second touch signal received by the first touch electrode in the touch stage.

[0093] It should be noted that, the above is only an exemplary description of the polarities of the signals received by the first display electrode in the display stage and the touch stage, and the polarities of the signals received by the first touch electrode in the display stage and the touch stage. In the embodiments of the present disclosure, the polarities of the signals received by the first touch electrode and the first display electrode in the display stage can also be the same or different, and the polarities of the signals received by the first touch electrode and the first display electrode in the display stage can also be the same or different in the touch stage. The specific design can be made according to actual needs, and the embodiments of the present disclosure do not make specific limitation thereon.

[0094] In an optional embodiment, referring to Figure 15 or Figure 17 , the polarity of the first touch signal VTX1 is opposite to the polarity of the second touch signal VTX2.

[0095] Wherein, when the first touch signal VTX1 is negative, the second touch signal VTX2 can be positive, or when the first touch signal VTX1 is positive, the second touch signal VTX2 is negative. The specific design can be made according to actual needs, and the embodiments of the present disclosure do not make specific limitation thereon.

[0096] Specifically, when the first touch signal VTX1 is negative and the second touch signal VTX2 is positive, the amplitude of the first touch signal VTX1 can be less than or equal to 0, and the amplitude of the second touch signal VTX2 can be greater than 0, so that in the touch stage, the first display electrode receives the first touch signal VTX1 with an amplitude less than or equal to 0, which is coupled to the first touch electrode and / or the second touch electrode, and at the same time, the first touch electrode receives the second touch signal VTX2 with an amplitude greater than 0, which is also coupled to the first display electrode. At this time, at least part of the coupling signals of the first touch signal VTX2 and the second touch signal VTX1 can be cancelled out, so as to reduce the influence of the first touch signal VTX1 on the signals on the first touch electrode and / or the second touch electrode, and reduce the influence of the second touch signal VTX2 on the signals on the first display electrode, thereby facilitating to improve the touch detection sensitivity and accuracy of the touch unit, and improve the display and lighting accuracy of the display unit.

[0097] On the basis of the above embodiments, optionally, continuing to refer to Figure 15 and Figure 16 , in the same moment of the touch stage, the amplitude of the first touch signal is V1, and the amplitude of the second touch signal is V2; wherein, V1=-V2.

[0098] Specifically, when the first touch signal and the second touch signal are both square wave signals, the first touch signal VTX1 can include a first amplitude V11 and a second amplitude V12, and the second touch signal VTX2 can include a third amplitude V21 and a fourth amplitude V22. At this time, one signal period H can include a first time period h1 and a second time period h2. In the first time period h1, the amplitude V1 of the first touch signal VTX1 can be the first amplitude V11, and the amplitude V2 of the second touch signal VTX2 can be the third amplitude V21. In the second time period h2, the amplitude V1 of the first touch signal VTX1 can be the second amplitude V12, and the amplitude V2 of the second touch signal VTX2 can be the fourth amplitude V22. Wherein, V11 = -V21, and V12 = -V22. In this way, in the touch phase, the absolute values of the amplitudes of the first touch signal VTX1 and the second touch signal VTX2 are the same and the polarities are opposite, so that the coupling amount of the first touch signal VTX1 and the second touch signal VTX2 can be mutually offset, thereby preventing the first touch signal VTX1 from affecting the touch detection of the touch unit, and the second touch signal VTX2 from affecting the display luminance of the display unit, and further ensuring that the touch unit has high touch sensitivity and accuracy, and the display unit has accurate display luminance.

[0099] Optionally, continuing to refer to Figure 15 and Figure 16 In the display phase Td, the polarities of the first power signal V10 received by the first display electrode and the second power signal V20 received by the first touch electrode can be the same or different. When the polarities of the first power signal V10 and the second power signal V20 are different, the coupling amount of the first power signal V10 and the second power signal V20 can also be mutually offset in the display phase Td, ensuring the touch sensitivity and accuracy while improving the display luminance accuracy.

[0100] It should be noted that the above only exemplarily illustrates the polarities of the signals received by the first display electrode and the second touch electrode in the display phase and the touch phase, respectively. The polarities of the signals received by the first display electrode and the second touch electrode in the display phase and the touch phase, respectively, are not limited to the above combinations, and can be designed according to actual needs. For ease of description, without special limitation, the technical solutions of the embodiments of the present disclosure are exemplarily illustrated with the case shown in Figure 16 as an example.

[0101] On the basis of the above embodiments, optionally, referring to Figure 17 and Figure 18The touch function layer includes a first touch electrode layer, which includes a plurality of first touch electrodes 31; the plurality of first touch electrodes 31 constitute at least one first touch electrode group 30A; in the touch stage Tt, the first touch electrodes 31 in the same touch electrode group 30A receive the second touch signal VTX2 in a time-sharing manner.

[0102] The plurality of first touch electrodes 31 may constitute one or more first touch electrode groups 30A. Each first touch electrode group 30A may include N first touch electrodes 31 , where N may be a positive integer. In this case, the touch stage Tt may include N touch sub-stages.

[0103] For example, Figure 17 and 18 As shown, the first touch electrode group 30A may include four first touch electrodes 31 (31A, 31B, 31C, 31D), and the touch stage Tt may correspond to four touch sub-stages (Tt1, Tt2, Tt3, Tt4). In the first touch sub-stage Tt1, the second touch signal Vtx21 may be provided to the first touch electrode 31A of each first touch electrode group 30A; in the second touch sub-stage Tt2, the second touch signal Vtx21 may be provided to the first touch electrode 31A of each first touch electrode group 30A; Electrode 31B provides a second touch signal Vtx22; in the third touch sub-stage Tt3, a second touch signal Vtx23 can be provided to the first touch electrode 31C of each first touch electrode group 30A; in the fourth touch sub-stage Tt4, a second touch signal Vtx24 can be provided to the first touch electrode 31D of each first touch electrode group 30A; in this way, the second touch signal VTX2 can be provided to each first touch electrode 31 of the same first touch electrode group 30A in a time-sharing manner.

[0104] When the second touch signal VTX2 is provided to each first touch electrode 31 of the same first touch electrode group 30A in time sharing, each first touch electrode 31 of the same first touch electrode group 30A can be electrically connected with the same first touch signal terminal TX, and at the same time, the touch display panel can further be provided with a plurality of multiplexing circuits 60. Each multiplexing circuit 60 can include N selection switches K0, for example, when N equals 4, the multiplexing circuit 60 can include four selection switches K0. The control end of each selection switch K0 receives a different switch selection signal sw (sw1, sw2, sw3, sw4), respectively. The first end of each selection switch K0 is electrically connected with each first touch electrode 31 through a touch wire 61, and the selection switches K0 electrically connected with each first touch electrode 31 of the same first touch electrode group 30A belong to the same multiplexing circuit 60. The second end of each selection switch K0 of the same multiplexing circuit is electrically connected with the same first touch terminal TX. In this way, by controlling each selection switch K0 of the same multiplexing circuit to be turned on in time sharing, the second touch signal VTX2 can be provided to each first touch electrode 31 of the same first touch electrode group 30A in time sharing. At the same time, because the first touch electrode group 30A is electrically connected with the same first touch terminal TX through the multiplexing circuit 60, it is beneficial to reduce the number of first touch terminals TX provided in the touch display panel 100, thereby being beneficial to reduce the number of terminals for providing the second touch signal VTX2 in the driving chip, and being beneficial to reduce the cost of the driving chip.

[0105] It should be noted that the above only exemplarily takes the first touch electrode group including four first touch electrodes as an example for description, and the number of first touch electrodes in the first touch electrode group in the embodiment of the present disclosure can also be 1, 2, 3 or any integer greater than 3, which can be designed according to actual needs, and the embodiment of the present disclosure does not make specific limitation thereto.

[0106] It should be further noted that the above only exemplarily takes the first touch electrode as a block electrode as an example for description, and in the embodiment of the present disclosure, the first touch electrode can also be a strip electrode, so that the first touch electrodes of each touch unit located in the same row are of an integrated structure, or the first touch electrode can also be a whole surface touch electrode, so that the first touch electrodes of each touch unit are of an integrated structure, and the specific shape of the first touch electrode can be designed according to actual needs, and the embodiment of the present disclosure does not make specific limitation thereto.

[0107] Exemplarily, as shown in FIG. 6, the first touch electrode group 30A includes four first touch electrodes 31, and the second touch electrode group 30B includes four second touch electrodes 32. Figure 19As shown, when the first touch electrodes 31 are strip electrodes, the first touch electrodes 31 are arranged in sequence along the Y direction, and at this time, the second touch electrodes 32 are also strip electrodes, and the second touch electrodes 32 are arranged in sequence along the X direction. The first touch electrodes 31 are respectively electrically connected to the touch terminals TX through corresponding signal lines, and the second touch electrodes 32 are respectively electrically connected to the sensing terminals RX through corresponding signal lines. In this way, after the second touch signal VTX2 is provided to the first touch electrode 311, the touch sensing signals fed back by the second touch electrodes 32 can be received through the sensing terminals RX respectively, so as to determine whether the touch position overlaps the first touch electrode 311; then, the second touch signal VTX2 is provided to the first touch electrode 312 again, and the touch sensing signals fed back by the second touch electrodes 32 are received through the sensing terminals RX again, so as to determine whether the touch position overlaps the first touch electrode 312; and so on. By providing the second touch signal VTX2 to the first touch electrodes 31 in time division, the detection of the touch position can be realized.

[0108] For ease of description, without special limitation, the technical solutions of the embodiments of the present disclosure are exemplarily described by taking the first touch electrode as a strip electrode.

[0109] On the basis of the above-mentioned embodiments, optionally, with reference to Figure 20 and Figure 21 The display functional layer includes a first display electrode layer; the first display electrode layer includes a plurality of first display electrodes 21 corresponding to the first touch electrodes 31 respectively; in the direction perpendicular to the plane where the substrate 10 is located, the corresponding first touch electrode 31 overlaps the first display electrode 21; the overlapping first touch electrode 31 and the first display electrode 21 constitute an overlapping electrode group; in the touch phase Tt, in the same overlapping electrode group, the time when the first touch electrode 31 receives the second touch signal VTX2 overlaps the time when the first display electrode 21 receives the first touch signal VTX1.

[0110] Among them, the number of first display electrodes 21 in the first display electrode layer can be the same as or different from the number of first touch electrodes 31 in the first touch electrode layer, and can be designed according to the time requirement, and the embodiments of the present disclosure do not make specific limitation.

[0111] For example, the number of first display electrodes 21 in the first display electrode layer is equal to the number of first touch electrodes 31 in the first touch electrode layer, i.e., when the first touch electrode layer includes n first touch electrodes 31, the first display electrode layer includes n first display electrodes 21, where n is a positive integer greater than 1. Each first display electrode 21 is arranged in one-to-one correspondence with each first touch electrode 31, i.e., first display electrode 211 corresponds to first touch electrode 311, so that first display electrode 211 and first touch electrode 311 form an overlapping electrode group, first display electrode 212 corresponds to first touch electrode 312, so that first display electrode 212 and first touch electrode 312 form an overlapping electrode group, first display electrode 213 corresponds to first touch electrode 313, so that first display electrode 213 and first touch electrode 313 form an overlapping electrode group, and so on. First display electrode 21n-1 corresponds to first touch electrode 31n-1, so that first display electrode 21n-1 and first touch electrode 31n-1 form an overlapping electrode group, and first display electrode 21n corresponds to first touch electrode 31n, so that first display electrode 21n and first touch electrode 31n form an overlapping electrode group. At this time, the touch stage Tt can include n touch sub-stages (Tt1, Tt2, Tt3, …, Ttn-1, Ttn). In the first touch sub-stage Tt1, first display electrode 211 receives first touch signal Vtx11, and first touch electrode 311 receives second touch signal Vtx201, so that after the coupling capacitance formed by the overlapping of first display electrode 211 and first touch electrode 311, the coupled first touch signal Vtx11 and second touch signal Vtx201 can cancel each other out, preventing first touch signal Vtx11 from affecting the signal on first touch electrode 311, and preventing second touch signal Vtx201 from affecting the signal on first display electrode 211. Similarly, in the second touch sub-stage Tt2, first display electrode 212 receives first touch signal Vtx12, and first touch electrode 312 receives second touch signal Vtx202, so that the coupling amount of first touch signal Vtx12 and second touch signal Vtx202 can cancel each other out; in the third touch sub-stage Tt3, first display electrode 213 receives first touch signal Vtx13, and first touch electrode 313 receives second touch signal Vtx203, so that the coupling amount of first touch signal Vtx13 and second touch signal Vtx203 can cancel each other out; and so on. In the (n-1)th touch sub-stage Ttn-1, first display electrode 21n-1 receives first touch signal Vtx1n-1, and first touch electrode 31n-1 receives second touch signal Vtx20n-1, so that the coupling amount of first touch signal Vtx1n-1 and second touch signal Vtx20n-1 can cancel each other out; and in the nth touch sub-stage Ttn, first display electrode 21n receives first touch signal Vtx1n, and first touch electrode 31n receives second touch signal Vtx20n, so that the coupling amount of first touch signal Vtx1n and second touch signal Vtx20n can cancel each other out.

[0112] The embodiment divides the first display electrode layer into a plurality of first display electrodes, and forms an overlapping electrode group by the intersecting and overlapping first display electrodes and first touch electrodes. The time when the first display electrodes in the same overlapping electrode group receive the first touch signal overlaps with the time when the first touch electrodes receive the second touch signal. Therefore, in the overlapping time, the coupling amount of the first touch signal of the first display electrodes and the second touch signal of the first touch electrodes in the same overlapping electrode group can be offset, the accuracy of the signals on the first display electrodes and the first touch electrodes is ensured, and the touch sensitivity and accuracy, the display and light emitting accuracy, and the display effect of the touch display panel are improved.

[0113] It can be understood that the time when the first touch electrodes in the same overlapping electrode group receive the second touch signal overlaps with the time when the first display electrodes receive the first touch signal, that is, the first display electrodes receive the first touch signal in at least part of the time when the first touch electrodes receive the second touch signal. At this time, the starting time when the first touch electrodes receive the second touch signal can be the same as or different from the starting time when the first display electrodes receive the first touch signal, and the ending time when the first touch electrodes receive the second touch signal can be the same as or different from the ending time when the first display electrodes receive the first touch signal. The specific design can be made according to actual needs, and the embodiment of the present disclosure does not make specific limitation.

[0114] In an optional embodiment, with reference to Figure 20 , Figure 22 and Figure 23 , in the touch phase Tt, in the same overlapping electrode group, the starting time when the first touch electrodes 31 are provided with the second touch signal VTX2 is the same time t1 as the starting time when the first display electrodes 21 are provided with the first touch signal VTX1.

[0115] The starting time of the first touch signal VTX1 can be understood as the time when the first display electrodes 21 are stopped being provided with the first power signal and start being provided with the first touch signal VTX1. Similarly, the starting time of the second touch signal VTX2 can be understood as the time when the first touch electrodes 31 are stopped being provided with the second power signal or the first touch electrodes 31 stop the suspension state and start being provided with the second touch signal VTX2. By setting the starting time when the first touch electrodes 31 in the same overlapping electrode group receive the second touch signal VTX2 to be the same time as the starting time when the first display electrodes 21 provide the first touch signal VTX1, the signal jump time of the first touch electrodes 31 and the signal jump time of the first display electrodes 21 in the same overlapping electrode group are the same time. Therefore, the coupling amount generated due to the signal jump can be offset, and the touch sensitivity and accuracy, and the display and light emitting brightness accuracy are improved.

[0116] In another alternative embodiment, referring to Figure 20 , Figure 24 and Figure 25 , in the touch phase, the termination time of the second touch signal provided to the first touch electrode and the termination time of the first touch signal provided to the first display electrode are the same time in the same overlap electrode group.

[0117] The termination time of the first touch signal VTX1 can be understood as the time when the first touch signal VTX1 provided to the first display electrode 21 is stopped and the first power signal provided to the first display electrode 21 is started. Similarly, the termination time of the second touch signal VTX2 can be understood as the time when the second touch signal VTX2 provided to the first touch electrode 31 is stopped and the second power signal provided to the first touch electrode 31 is started or the first touch electrode 31 starts to be in a floating state. By setting the termination time of the second touch signal VTX2 received by the first touch electrode 31 and the termination time of the first touch signal VTX1 provided by the first display electrode 21 to be the same time in the same overlap electrode group, the signal jump time of the first touch electrode 31 and the signal jump time of the first display electrode 21 are the same time in the same overlap electrode group, so that the coupling amount generated by signal jump can be offset, thereby improving the touch sensitivity and accuracy, and improving the display and light emitting brightness accuracy.

[0118] It can be understood that when the start time of the second touch signal VTX2 of the first touch electrode and the start time of the first touch signal VTX1 of the first display electrode are the same time in the same overlap electrode group, the termination time t22 of the second touch signal VTX2 of the first touch electrode can be located before the termination time t21 of the first touch signal VTX1 of the first display electrode (as shown in Figure 23 ), or the termination time t22 of the second touch signal VTX2 of the first touch electrode can be located after the termination time t21 of the first touch signal VTX1 of the first display electrode (as shown in Figure 22 ), or the termination time of the second touch signal VTX2 of the first touch electrode and the termination time of the first touch signal VTX1 of the first display electrode are also the same time (as shown in Figure 21 ). Correspondingly, when the termination time of the second touch signal VTX2 of the first touch electrode and the termination time of the first touch signal VTX1 of the first display electrode are the same time in the same overlap electrode group, the start time t12 of the second touch signal VTX1 of the first touch electrode can be located before the start time t11 of the first touch signal VTX1 of the first display electrode (as shown in Figure 25VTX2 of the first touch electrode can be located after the starting time t11 of the first touch signal VTX1 of the first display electrode (as shown in FIG. 6B), or the starting time of the second touch signal VTX1 of the first touch electrode is the same as the starting time of the first touch signal VTX1 of the first display electrode (as shown in FIG. 6C). The time overlap of the first touch signal VTX1 and the second touch signal VTX2 can be designed according to actual needs, and the embodiments of the present disclosure do not make specific limitations thereto. Figure 24 VTX2 of the first touch electrode can be located after the starting time t11 of the first touch signal VTX1 of the first display electrode (as shown in FIG. 6B), or the starting time of the second touch signal VTX1 of the first touch electrode is the same as the starting time of the first touch signal VTX1 of the first display electrode (as shown in FIG. 6C). The time overlap of the first touch signal VTX1 and the second touch signal VTX2 can be designed according to actual needs, and the embodiments of the present disclosure do not make specific limitations thereto. Figure 21 VTX2 of the first touch electrode can be located after the starting time t11 of the first touch signal VTX1 of the first display electrode (as shown in FIG. 6B), or the starting time of the second touch signal VTX1 of the first touch electrode is the same as the starting time of the first touch signal VTX1 of the first display electrode (as shown in FIG. 6C). The time overlap of the first touch signal VTX1 and the second touch signal VTX2 can be designed according to actual needs, and the embodiments of the present disclosure do not make specific limitations thereto.

[0119] On the basis of the above-mentioned embodiments, optionally, referring to FIG. 7A and FIG. 7B, Figure 20 When the first display electrode layer includes a plurality of first display electrodes 21, each first display electrode can be respectively electrically connected with each first signal terminal O1 through a corresponding signal line, so that each first signal terminal O1 can provide the first touch signal VTX1 to each first display electrode 21 in the touch stage, and the first touch signals VTX1 provided by each first signal terminal O1 do not interfere with each other, ensuring that the time when the first display electrode 21 in the same overlapping electrode receives the first touch signal VTX1 can overlap with the time when the first touch electrode 31 receives the second touch signal VTX2, and the signal coupling amount of the first touch signal VTX1 and the second touch signal VTX2 is offset.

[0120] On the basis of the above-mentioned embodiments, optionally, referring to FIG. 7A and FIG. 7B, Figure 26 As shown in FIG. 8, the touch display panel 100 can further include a first signal transmission line 71 and a signal control circuit 70; the signal control circuit 70 is respectively electrically connected with the first signal transmission line 71 and each first display electrode 21; the first signal transmission line 71 is used for transmitting the first touch signal VTX1 in the touch stage.

[0121] The signal control circuit 70 can include a signal input end and a plurality of signal output ends corresponding to each first display electrode 21 one by one, the signal input end of the signal control circuit 70 can be electrically connected with the first signal transmission line 71, and each signal input end can be electrically connected with each first display electrode 21 one by one. The signal control circuit 70 can control the conduction path between the signal input end and the signal output end, so as to control the time when the first touch signal VTX1 transmitted by the first signal transmission line 71 is provided to each first display electrode 21, so that the first touch signal VTX1 received by the intersecting and overlapping first display electrode 21 and the second touch signal VTX2 received by the first touch electrode 31 can offset each other, thereby improving the touch sensitivity and accuracy, and improving the display and light emitting accuracy.

[0122] In addition, the first signal transmission line 71 can also be electrically connected with the first signal terminal O1, at this time, only one first signal terminal O1 for providing the first touch signal VTX1 in the touch stage is needed, which is beneficial to reduce the number of first signal terminals O1 in the touch display panel, simplify the structure and reduce the cost.

[0123] On the basis of the above embodiment, optionally, referring to Figure 27 The touch display panel 100 can also include a plurality of switch control lines 72; the signal control circuit 70 includes a plurality of control switches K1 corresponding to each first display electrode 21; the input end of each control switch K1 is electrically connected with the first signal transmission line 71, the output end of each control switch K1 is respectively electrically connected with each first display electrode 21, and the control end of each control switch K1 is respectively electrically connected with each switch control line 72.

[0124] The switch control line 72 can be used to transmit a switch control signal, so that the switch control signal can control the control switch K1 to be turned on or off, and when the control switch K1 is in the on state, the first touch signal VTX1 transmitted by the first signal transmission line 71 in the touch stage can be provided to the first display electrode 21 electrically connected with the control switch K1; on the contrary, when the control switch K1 is in the off state, the first touch signal VTX1 cannot transmit the first touch signal VTX1 to the first display electrode 21 in the touch stage. In this way, by controlling the control switch K1 electrically connected with the first display electrode 21 in different overlapping electrode groups to be turned on at different times, that is, the effective level of the switch control signal transmitted by each switch control line 72 at different times, the first touch signal VTX1 can be provided to each first display electrode 21 at different times, so as to ensure that the signal coupling amount of the first touch signal VTX1 and the second touch signal VTX2 can be offset each other, and the sensitivity and accuracy of touch detection and the accuracy of display luminance are ensured.

[0125] In addition, the touch display panel 100 can also be provided with a plurality of second signal terminals O2 corresponding to each switch control line 72, each second signal terminal O2 provides a switch control signal to each switch control line 72, so that the control control signal transmitted by the switch control line 72 can control the control switch K1 to be turned on at different times in the touch stage, and then the first touch signal VTX1 is provided to each first display electrode 21 at different times. Correspondingly, in the display stage, when each first display electrode 21 receives the same first power signal, each switch control line 72 can transmit the same control signal to control each control switch K1 to be turned on at the same time, so that each first display electrode 21 can receive the first power signal at the same time, and the signal consistency of each first display electrode 21 in the display stage is ensured.

[0126] It can be understood that, on the premise that each control switch can control the time of providing the first touch signal to each first display electrode, the structure of each control switch can be designed according to actual needs, and the specific structure of each control switch is not limited in the embodiments of the present disclosure. In an optional embodiment, the control switch can include a switch transistor, a gate of the switch transistor can be electrically connected with the switch control line, a first pole of the switch transistor can be electrically connected with the first signal transmission line, and a second pole of the switch transistor can be electrically connected with the first display electrode. The switch control signal transmitted through the switch control line can control the conduction or closing of the switch transistor, so as to control the conduction path between the first signal transmission line and the first display electrode.

[0127] In other optional embodiments, referring to Figure 28 When the display function layer includes the first display electrode layer, and the first display electrode layer includes the first display electrode 21, the first display electrode 21 of each display unit can be a unitary structure; the touch display panel 100 further includes a first signal transmission line 71. The first display electrode 21 is electrically connected with the first signal transmission line 71, and the first signal transmission line 71 is at least used for transmitting the first touch signal VTX1 in the touch stage.

[0128] The first signal transmission line 71 can also be electrically connected with the first signal terminal O1, so that the first signal transmission line 71 can transmit the signal provided by the first signal terminal O1 to the first display electrode 21, so that the first display electrode 21 of each display unit can simultaneously receive the same signal, ensuring that the first display electrode 21 of each display unit in the touch stage can simultaneously receive the first touch signal VTX1, and ensuring that the first display electrode 21 of each display unit in the display stage can simultaneously receive the first power supply signal, thereby ensuring the signal consistency of the first display electrode 21 of each display unit.

[0129] On the basis of the above-mentioned embodiments, optionally, referring to Figure 28 and Figure 29 The starting time t01 of the alternating signal of the first touch signal VTX1 is the starting time of the touch stage Tt, and / or the ending time t02 of the alternating signal of the first touch signal VTX1 is the ending time of the touch stage Tt.

[0130] The starting time t01 of the alternating signal of the first touch signal VTX1 can be understood as the time when the first touch signal VTX1 ends to maintain the first power supply signal and starts to periodically change between the first amplitude and the second amplitude. Similarly, the ending time t02 of the alternating signal of the first touch signal VTX1 can be understood as the time when the first touch signal VTX1 stops to periodically change between the first amplitude and the second amplitude and starts to become the fixed first power supply signal.

[0131] The second touch signal Vtx201 of the alternating signal is sequentially provided to the first touch electrode 311 at the beginning of the first touch electrode group to the first touch electrode 31n at the end of the first touch electrode group between the starting time and the ending time of the touch stage Tt. By setting the starting time t01 of the alternating signal of the first touch signal VTX1 provided to the first display electrode 21 and the starting time of the touch stage Tt as the same time, at least the coupling signal generated by the jump of the second touch signal Vtx21 received by the first touch electrode 311 can be offset with the coupling signal generated by the jump of the first touch signal VTX1 received by the first display electrode 21 at the starting time of the touch stage Tt. By setting the ending time t02 of the alternating signal of the first touch signal VTX1 provided to the first display electrode 21 and the ending time of the touch stage Tt as the same time, at least the coupling signal generated by the jump of the second touch signal Vtx21 received by the first touch electrode 31n can be offset with the coupling signal generated by the jump of the first touch signal VTX1 received by the first display electrode 21 at the ending time of the touch stage Tt. In this way, the touch sensitivity and accuracy of the touch display panel and the display light emitting accuracy of the display unit can be improved.

[0132] Based on the same inventive concept, the display device provided by the embodiment of the present disclosure comprises the touch display panel provided by the embodiment of the present disclosure, and therefore, the display device comprises the technical features of the touch display panel provided by the embodiment of the present disclosure, and can achieve the beneficial effects of the touch display panel provided by the embodiment of the present disclosure. The same parts can be understood with reference to the above explanation and description of the touch display panel, and will not be repeated here.

[0133] Exemplarily, Figure 30 is a structural schematic diagram of a display device provided by the embodiment of the present disclosure, as Figure 30 The display device 200 can include, but is not limited to, a mobile phone, a television, a notebook computer, a desktop display, a tablet computer, a digital camera, a smart bracelet, smart glasses, a vehicle-mounted display, medical equipment, industrial control equipment, a touch interaction terminal, etc., and the present disclosure does not make special limitations on this.

[0134] On the basis of the above-mentioned embodiments, optionally, with reference to Figure 31As shown, the display device 200 further comprises a driving circuit 300; the driving circuit 300 is configured to provide a first touch signal to the first display electrodes of the touch display panel 100 and provide a second touch signal to the first touch electrodes of the touch display panel 100 in a touch stage; the driving circuit 300 is further configured to provide a first power signal to the first display electrodes in a display stage; the first touch signal and the second touch signal each comprise an alternating current signal; and the first power signal is a direct current signal.

[0135] In the display device 200, the touch display panel 100 can comprise a display area AA and a non-display area NA surrounding the display area AA at least partially, and the non-display area NA can comprise a driving circuit arrangement area for arranging the driving circuit 300. In the display stage, the driving circuit 300 can provide the first power signal to the first display electrodes of the display units, so that the display units can display and emit light under the control of the first power signal at least. Meanwhile, in the touch stage, the driving circuit 300 can provide the first touch signal to the first display electrodes of the display units and provide the second touch signal to the first touch electrodes, so that the coupling amount of the first touch signal received by the first display electrodes to the first touch electrodes can be offset by the coupling amount of the second touch signal received by the first touch electrodes to the first display electrodes, thereby ensuring the touch sensitivity and accuracy of the touch display panel and improving the display effect of the touch display panel.

[0136] In an optional embodiment, as shown in Figure 32 The driving circuit 300 can comprise a touch driving chip 310 and a power management chip 320; at this time, the touch driving chip 310 and the power management chip 320 can provide different signals respectively, so as to drive the touch units to realize the touch function in the touch stage and drive the display units to display and emit light in the display stage.

[0137] In an optional embodiment, the touch driving chip 310 can be electrically connected with each touch unit, so that the touch driving chip 310 can provide a second touch signal to the first touch electrode of each touch unit in the touch stage, and receive the touch sensing signal fed back by each touch unit, so as to determine the touch position of the touch area according to the provided second touch signal and the received touch sensing signal. The power management chip 320 can be electrically connected with each display unit, so that the power management chip can provide a first power signal to the first display electrode of each display unit in the display stage, and provide a first touch signal to the first display electrode of each display unit in the touch stage. In this way, the touch driving chip 310 can only control the signals in each touch unit, and the power management chip 320 can only control the signals in each display unit, so that the touch driving chip 310 and the power management chip 320 both have a small load, which is beneficial to improve the touch driving accuracy of the touch driving chip 310 and the display control accuracy of the power management chip 320.

[0138] In another optional embodiment, the touch driving chip 310 can be electrically connected with each touch unit and each display unit, so that in the touch stage, the touch driving chip 310 can provide a first touch signal to the first display electrode of each display unit, and provide a second touch signal to the first touch electrode of each touch unit, and receive the touch sensing signal fed back by each touch unit, so as to determine the touch position of the touch object to realize the touch function under the premise of ensuring the touch sensitivity and the display accuracy. The power management chip 320 can be electrically connected with each display unit, so that the power management chip 320 can provide at least a first power signal to the first display electrode of each display unit in the display stage, so as to ensure that the display unit can accurately display light in the display stage. In this way, in the display stage, the power management chip 320 can be in a working state to provide the first power signal to each display unit, and in the touch stage, the touch driving chip 310 can be in a working state to provide the first touch signal to the display unit and the first touch electrode, so as to reduce the number of chips working in the display stage and the number of chips working in the touch stage, and thus be beneficial to the low power consumption of the display device.

[0139] In addition, the driving circuit 300 can further include a display driving chip, which can be used to provide a display control signal to each display unit in the display stage, the display control signal including but not limited to a data signal, a reset signal, an initialization signal, a clock signal, etc., to drive each display unit to display light. The display driving chip and the touch driving chip 310 can be integrated into the same chip, or the display driving chip and the touch driving chip 310 can also be different chips, which can be designed according to actual needs, and the embodiments of the present disclosure do not make specific limitations.

[0140] Note that the above merely describes preferred embodiments of the present disclosure and the principles of technology applied. Those skilled in the art will understand that the present disclosure is not limited to the specific embodiments described herein, and that various obvious changes, reconfigurations and substitutions can be made by those skilled in the art without departing from the scope of the present disclosure. Therefore, although the present disclosure has been described in more detail through the above embodiments, the present disclosure is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present disclosure, and the scope of the present disclosure is determined by the scope of the claims.

Claims

1. A touch display panel, characterized in that: include: A base substrate, and a display function layer and a touch function layer located on one side of the base substrate; The display function layer includes a plurality of display units arranged in an array; the display unit includes a first display electrode; The touch function layer includes a plurality of touch units; the touch units include first touch electrodes; The working process of the touch display panel at least includes a touch stage; In the touch stage, the first display electrode of each display unit receives a first touch signal, and the first touch electrode of each touch unit receives a second touch signal respectively; the first touch signal and the second touch signal both include AC signals.

2. The display panel according to claim 1, wherein: The polarity of the first touch signal is opposite to that of the second touch signal.

3. The display panel according to claim 1, wherein: At the same time in the touch stage, the amplitude of the first touch signal is V1, and the amplitude of the second touch signal is V2; wherein V1=-V2.

4. The display panel according to claim 1, wherein: The working process of the touch display panel also includes a display stage; In the display stage, the first display electrode of the display unit receives a first power signal; the first power signal is a DC signal.

5. The display panel according to claim 4, wherein: The first power signal and the first touch signal have the same polarity.

6. The touch display panel according to claim 1, wherein: The touch function layer includes a first touch electrode layer; the first touch electrode layer includes a plurality of first touch electrodes; The plurality of first touch electrodes constitute at least one first touch electrode group; In the touch stage, the first touch electrodes in the same touch electrode group receive the second touch signal in a time-sharing manner.

7. The touch display panel according to claim 6, wherein: The display function layer includes a first display electrode layer; the first display electrode layer includes a plurality of first display electrodes respectively corresponding to the first touch electrodes; In a direction perpendicular to the plane of the base substrate, the corresponding first touch electrodes overlap with the first display electrodes; the overlapping first touch electrodes and the first display electrodes form an overlapping electrode group; In the touch stage, in the same overlapping electrode group, the time when the first touch electrode receives the second touch signal overlaps with the time when the first display electrode receives the first touch signal.

8. The touch display panel according to claim 7, wherein: In the touch stage, in the same overlapping electrode group, a start time of providing the second touch signal to the first touch electrode and a start time of providing the first touch signal to the first display electrode are the same time.

9. The touch display panel according to claim 7, wherein: In the touch stage, in the same overlapping electrode group, a termination time of providing the second touch signal to the first touch electrode and a termination time of providing the first touch signal to the first display electrode are the same time.

10. The touch display panel according to claim 7, wherein: Also includes: a first signal transmission line and a signal control circuit; The signal control circuit is electrically connected to the first signal transmission line and each of the first display electrodes respectively; The first signal transmission line is used to transmit the first touch signal during the touch phase.

11. The touch display panel according to claim 10, wherein: Also includes: Multiple switch control lines; The signal control circuit includes a plurality of control switches arranged corresponding to each of the first display electrodes; The input end of each control switch is electrically connected to the first signal transmission line, the output end of each control switch is electrically connected to each corresponding first display electrode, and the control end of each control switch is electrically connected to each switch control line.

12. The touch display panel according to claim 1, wherein: The touch control unit further includes a second touch control electrode; In the touch control stage, the second touch control electrodes of the touch control units sequentially output touch sensing signals.

13. The touch display panel according to claim 1, wherein: Also includes: a first signal transmission line; The display function layer includes a first display electrode layer; the first display electrode layer includes the first display electrode; Wherein, the first display electrode of each display unit is an integrated structure; the first display electrode is electrically connected to the first signal transmission line; The first signal transmission line is at least used to transmit the first touch signal during the touch phase.

14. The touch display panel according to claim 13, wherein: The starting time of the AC signal of the first touch signal is the starting time of the touch phase; and / or, The termination moment of the AC signal of the first touch signal is the termination moment of the touch phase.

15. The touch display panel according to claim 1, wherein: The display function layer includes a driving circuit layer and a light-emitting function layer located on a side of the driving circuit layer away from the base substrate; The driving circuit layer includes a plurality of pixel circuits arranged in an array; the light-emitting function layer includes a plurality of light-emitting elements; the light-emitting elements include the first display electrode, the second display electrode, and a light-emitting layer located between the first display electrode and the second display electrode; The pixel circuit is electrically connected to the second display electrode in correspondence; the correspondingly connected pixel circuit and the light-emitting element constitute the display unit.

16. A display device, characterized in that: include: The touch display panel according to any one of claims 1 to 15.

17. The display device according to claim 16, wherein: Also includes: Drive circuit; The driving circuit is configured to provide a first touch signal to the first display electrode of the touch display panel and a second touch signal to the first touch electrode of the touch display panel during a touch control phase; The driving circuit is further configured to provide a first power supply signal to the first display electrode during a display phase; The first touch signal and the second touch signal both include AC signals; and the first power signal is a DC signal.

18. The display device according to claim 17, wherein: The driving circuit includes a touch driving chip and a power management chip; The power management chip is used to provide the first power signal to the first display electrode in the display stage, and to provide the first touch signal to the first display electrode in the touch stage; The touch driving chip is configured to provide the second touch signal to the first touch electrode during the touch stage.

19. The display device according to claim 17, wherein: The driving circuit includes a touch driving chip and a power management chip; The power management chip is used for providing a first power signal to the first display electrode during the display phase; The touch driving chip is used to provide a first touch signal to the first display electrode and provide a second touch signal to the first touch electrode during the touch stage.

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