Display device, touch display panel, and driving method thereof

Abstract

The present invention relates to the display technical field, and provides a display device, a touch display panel, and a driving method thereof. The touch display panel includes a display area and a peripheral area located outside the display area, a part of the peripheral area protrudes along a direction away from the display area to form a lead-out area, and the lead-out area has a binding part. The touch display panel includes a display substrate, a touch layer, and a switching circuit, the touch layer is provided on one side of the display substrate and includes at least two touch islands distributed in an array, with a gap between two adjacent touch islands, each touch island includes at least two touch electrodes, the touch electrodes include at least two induction electrodes for outputting an induction signal, and the switching circuit is at least partially provided in the peripheral area, one of the touch islands is connected to the binding part through one of the switching circuits, and the switching circuit is used to at least turn on or off the induction electrodes and the binding part. This can increase the signal-to-noise ratio and improve the accuracy of touch control.

Description

[Technical field]

[0001] The present disclosure relates to the field of touch technology, and in particular to a display device, a touch display panel, and a driving method for the touch display panel. [Background technology]

[0002] A touch display panel is an essential component of electronic devices such as mobile phones and tablets, which display images and realize human interaction. Here, the application of a capacitive touch display panel is relatively wide, and touch operation can be realized by contact with a device such as a finger or a passive pen, and also by an active pen. However, the touch accuracy of the conventional capacitive touch display panel needs to be improved.

[0003] It should be noted that the information disclosed in the above Background section is used only to enhance understanding of the background of the present disclosure and may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0004] The present disclosure provides a display device, a touch display panel, and a driving method for the touch display panel.

[0005] An aspect of the present disclosure provides a touch display panel, the touch display panel including a display area and a peripheral area located outside the display area, a part of the peripheral area protruding away from the display area to form at least one pull-out area, the pull-out area having a binding portion, the touch display panel including a display substrate, a touch layer, and a switching circuit; The touch layer is provided on one side of the display substrate, and includes at least two touch islands distributed in an array, with a gap between two adjacent touch islands, each of the touch islands includes at least two touch electrodes, and the touch electrodes include at least two induction electrodes for outputting induction signals; The switching circuit is at least partially provided in the peripheral region, and one of the touch islands is connected to the binding portion via one of the switching circuits, and the switching circuit is used to turn on or off at least the induction electrode and the binding portion.

[0006] In one exemplary embodiment of the present disclosure, the switching circuit includes at least two touch leads and a switching element, and any one of the touch electrodes is connected to the binding portion via one of the touch leads; The switching element is provided on a touch lead connected to the induction electrode, and is used to turn on or off the touch lead connected thereto in response to a control signal.

[0007] In one exemplary embodiment of the present disclosure, the switching element is a switching transistor, a first pole and a second pole of one of the switching transistors are connected to one of the touch lead, and a gate of the switching transistor is used to receive the control signal.

[0008] In one exemplary embodiment of the present disclosure, the switching circuit further includes a switch scan line, in which the switch scan line connects gates of the switching transistors in series, is connected to the binding portion, and is used to transmit the control signal.

[0009] In an exemplary embodiment of the present disclosure, the touch display panel includes a switching active layer, a first insulating layer, a switching gate, and a second insulating layer; a switching active layer provided in the display substrate, the switching active layer including a channel region and the first pole and the second pole located on both sides of the channel region; a first insulating layer covering the active layer; a switching gate is provided on a surface of the first insulating layer away from the switching active layer and overlaps the switching active layer to form the switching transistor, the switching gate is connected to the switch scan line; a second insulating layer covering the switching gate; The touch lead is located on the side of the second insulating layer away from the switching active layer and includes two lead segments distributed at a distance along the column direction, one of the lead segments connecting the touch electrode to the first pole and the other lead segment connecting the second pole to the binding portion.

[0010] In one exemplary embodiment of the present disclosure, the switching active layer extends along a row direction, the first pole and the second pole are located on both sides of the channel region along a column direction, and the second pole is located between the channel region and the binding portion; The switch scan line and the switching gate are integral with each other, extend along the row direction, and overlap a channel region of the switching active layer.

[0011] In an exemplary embodiment of the present disclosure, the touch display panel further includes a first conductive layer, a third insulating layer, a second conductive layer, and a fourth insulating layer; a first conductive layer is provided on a surface of the second insulating layer away from the switching active layer, and includes a first conductive portion and a second conductive portion distributed at intervals along the column direction, the first conductive portion and the first pole overlap with each other and are connected via a first contact hole, and the second conductive portion and the second pole overlap with each other and are connected via a second contact hole; a third insulating layer covering the first conductive layer; the second conductive layer is provided on a surface of the third insulating layer away from the switching active layer, and includes a third conductive portion and a fourth conductive portion that are distributed at intervals along the column direction, the third conductive portion and the first conductive portion overlapping and connected, and the fourth conductive portion and the second conductive portion overlapping and connected, a fourth insulating layer covering the second conductive layer; The touch lead is located on the side of the fourth insulating layer away from the switching active layer, and the lead segment connected to the touch electrode is connected to the third conductive portion, and the lead segment connected to the binding portion is connected to the fourth conductive portion.

[0012] In one exemplary embodiment of the present disclosure, the first conductive portion includes a first connection portion and a second connection portion connected along the column direction, the first connection portion extends along the row direction, overlaps with the first pole, and is connected via the first contact hole, the second connection portion is connected to a side of the first connection portion away from the second conductive portion and extends along the column direction, and the second connection portion is connected to the third conductive portion, The second conductive portion includes a third connection portion and a fourth connection portion connected along the column direction, the third connection portion extends along the row direction, overlaps with the second pole, and is connected via the second contact hole, the fourth connection portion is connected to a side of the third connection portion away from the first conductive portion, extends along the column direction, and the fourth connection portion is connected to the fourth conductive portion.

[0013] In one exemplary embodiment of the present disclosure, the first connection portion is connected to the first pole via at least two first contact holes distributed at intervals along the row direction, and the second connection portion is connected to the second pole via at least two second contact holes distributed at intervals along the row direction.

[0014] In one exemplary embodiment of the present disclosure, the row-direction length of the switching active layer is greater than the row-direction widths of the touch lead, the second connecting portion, the fourth connecting portion, the third conductive portion and the fourth conductive portion.

[0015] In one exemplary embodiment of the present disclosure, the switching active layer includes at least two active portions distributed at intervals along the row direction, each of the active portions overlapping the switch scan line and connected to the first conductive portion and the second conductive portion.

[0016] In one exemplary embodiment of the present disclosure, the display substrate includes a driving backplate, a light-emitting layer, and a package layer, which are sequentially stacked, and the touch layer is located on a side of the package layer away from the driving backplate; The driving backplate includes a substrate, a semiconductor layer, a first gate insulating layer, a first gate layer, a second gate insulating layer, a second gate layer, an interlayer dielectric layer, a first source drain layer, a first planar layer, a second source drain layer, a second planar layer, and a touch buffer layer; a semiconductor layer is disposed on the substrate, the switching active layer being located in the semiconductor layer; a first gate insulating layer covering the semiconductor layer, the first insulating layer being located on the gate insulating layer; a first gate layer is provided on a surface of the gate insulating layer away from the substrate, and the switching gate is located in the first gate layer; a second gate insulating layer covering the first gate layer; a second gate layer is provided on a surface of the second gate insulating layer away from the substrate; an interlevel dielectric layer covers the second gate layer, the second insulating layer including a portion of the gate insulating layer and a portion of the interlevel dielectric layer; a first source-drain layer is provided on a surface of the interlayer dielectric layer away from the substrate, and the first conductive layer is located on the first source-drain layer; a first planar layer covering the first source-drain layer, and a third insulating layer located on the first planar layer; a second source-drain layer is provided on a surface of the first planar layer away from the substrate, and the second conductive layer is located on the second source-drain layer; a second planar layer covers the second source-drain layer, the light-emitting layer is provided on a surface of the second planar layer away from the substrate, and both the light-emitting layer and the package layer are exposed from the drawing region; A fourth insulating layer covers a touch buffer layer, the light emitting layer and an area of ​​the second planar layer located in the drawing region, the touch layer is provided on a surface of the touch buffer layer away from the substrate, and the fourth insulating layer includes a portion of the second planar layer and a portion of the touch buffer layer.

[0017] In one exemplary embodiment of the present disclosure, the binding portion includes at least two pads, one of the touch leads is connected to one of the pads, and the switch scan line is connected to one of the pads.

[0018] In one exemplary embodiment of the present disclosure, in one of the touch islands, The touch electrodes include at least two first touch electrodes and at least two second touch electrodes, the first touch electrodes extend along a column direction and are distributed at intervals along a row direction, the second touch electrodes extend along the row direction and are distributed at intervals along the column direction, and each of the first touch electrodes is arranged to cross and be insulated from each of the second touch electrodes; The first touch electrode is a drive electrode for receiving a drive signal, and the second touch electrode is the induction electrode.

[0019] In one exemplary embodiment of the present disclosure, each of the touch electrodes is an inductive electrode.

[0020] In one exemplary embodiment of the present disclosure, one of the first touch electrodes includes at least two first electrode blocks spaced apart from one another along a column direction and an adapter bridge connecting two adjacent first electrode blocks; one of the second touch electrodes includes at least two second electrode blocks connected in series along the row direction; and one of the adapter bridges is provided to cross one of the second touch electrodes; the touch layer includes an adapter layer, a spacer layer, and an electrode layer; an adapter layer disposed on one side of the display substrate and including the adapter bridge; a spacer layer covering the adapter layer; The electrode layer is provided on a surface of the spacer layer remote from the display substrate, and includes the first electrode block and the second electrode block.

[0021] In one exemplary embodiment of the present disclosure, the gap is located in the electrode layer and cuts a portion of the first electrode block and a portion of the second electrode block.

[0022] In one exemplary embodiment of the present disclosure, the gaps include at least one first gap and at least one second gap, the first gap extending along the column direction and the second gap extending along the row direction and intersecting the first gap.

[0023] In one exemplary embodiment of the present disclosure, the gap extends along a curved or polygonal locus.

[0024] One aspect of the present disclosure provides a driving method for a touch display panel, the touch display panel being any one of the touch display panels described above, the touch island including a plurality of sets, the number of the touch islands in each set being one or more; The driving method includes: In one touch period, the switching circuits of the touch islands and the binding unit of each set are sequentially turned on, and the induction signals generated in the touch islands of each set are sequentially obtained; and determining a touch location based on the induced signal.

[0025] One aspect of the present disclosure provides a display device including any one of the touch display panels described above and a flexible circuit board, the flexible circuit board is connected to the binding portion; The touch chip is connected to the flexible circuit board.

[0026] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

[0027] The drawings herein are incorporated into the specification, show embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure. Obviously, the drawings in the following description are merely some embodiments of the present disclosure, and those skilled in the art can obtain other drawings based on these drawings without paying creative labor. [Brief description of the drawings]

[0028] [Figure 1] FIG. 1 is a circuit principle diagram of a touch display panel according to the related art. [Diagram 2] FIG. 2 is a plan view of one embodiment of a touch display panel of the present disclosure. [Diagram 3] FIG. 2 is a cross-sectional view of one embodiment of a touch display panel of the present disclosure. [Figure 4] FIG. 2 is a cross-sectional view of a display substrate in an embodiment of a touch display panel of the present disclosure. [Diagram 5] FIG. 2 is a plan view of a touch layer and switching circuitry in one embodiment of a touch display panel of the present disclosure. [Figure 6]FIG. 2 is a plan view of a touch layer and switching circuits in another embodiment of a touch display panel of the present disclosure. [Figure 7] FIG. 13 is a plan view of a touch layer and a switching circuit in yet another embodiment of a touch display panel of the present disclosure. [Figure 8] FIG. 2 is a driving timing diagram of an embodiment of a touch display panel of the present disclosure. [Figure 9] FIG. 11 is a driving timing diagram of another embodiment of a touch display panel of the present disclosure. [Figure 10] FIG. 2 is a partial enlarged view of a touch layer in one embodiment of a touch display panel of the present disclosure. [Figure 11] FIG. 2 is a partial plan view of a switching transistor in an embodiment of a touch display panel of the present disclosure. [Figure 12] FIG. 2 is a partial plan view of a pull-out area in an embodiment of a touch display panel of the present disclosure. [Figure 13] 12 is a cross-sectional view taken along the line AA in FIG. 11. [Figure 14] 12 is a cross-sectional view of FIG. 11 taken along line B-B. [Figure 15] FIG. 1 is a schematic diagram of an embodiment of a display device according to the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] Next, the exemplary embodiments will be described in more detail with reference to the drawings. However, the exemplary embodiments can be implemented in various forms and should not be understood to be limited to the embodiments described herein. On the contrary, these embodiments are provided so that this disclosure will be comprehensive and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. Since the same reference numerals in the drawings represent the same or similar structures, detailed descriptions will be omitted. In addition, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0030] The terms "a", "one", "the", "said", and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "comprising" and "having" are used to denote an open inclusion and mean that other elements / components / etc. may be present in addition to the listed elements / components / etc.; the terms "first", "second", "third", etc. are used as indicative terms only and are not a quantitative limitation on the subject matter.

[0031] The row direction X and the column direction Y in the text are merely two directions perpendicular to each other, and in the drawings of the present disclosure, the row direction X may be horizontal and the column direction Y may be vertical, but is not limited thereto, and the actual orientations of the row direction X and the column direction Y may change when the touch display panel is rotated. The X direction in the drawings illustrates the row direction, and the Y direction illustrates the column direction.

[0032] In the related art, a touch display panel generally includes a display substrate and a touch layer disposed on the light-emitting side of the display substrate, the display substrate is used for displaying an image, and the touch layer is used for determining a touch position based on an induced signal, generating a specific image on the display substrate, thereby realizing human interaction. In a capacitive touch display panel, the touch layer includes a plurality of touch electrodes, which induce a change in capacitance due to the operation of a finger or a touch pen, and obtains an induced signal to determine a touch position.

[0033] The inventors have found that due to the presence of a conductive film layer on the display substrate, a coupling signal that interferes with the induced signal of the touch electrode is generated due to the signal change of the conductive film layer, reducing the signal-to-noise ratio of the detected signal and affecting the accuracy of touch control. In particular, for products that use an active pen for touching, the amount of the coupling signal between the active pen and the touch electrode is small, and the amount of the signal is small in a suspended state (the active pen and the touch display panel are not in contact), so the coupling signal by the conductive film layer becomes larger than the coupling signal between the touch electrode and the active pen, which may significantly reduce the accuracy of touch and cause it to fail.

[0034] For example, taking a mutual capacitance type touch display panel using organic electroluminescence diodes (OLEDs) as light emitting elements as an example, the display substrate includes a driving backplate, a light emitting layer and a package layer, where the light emitting layer is provided on one side of the driving backplate and includes a plurality of light emitting elements, the light emitting elements include a first electrode, a light emitting material layer and a second electrode sequentially stacked in a direction away from the driving backplate, the first electrode is distributed in an array, the second electrode is a full-layer structure, and each light emitting element can share the second electrode. The package layer covers the light emitting elements.

[0035] The touch layer is provided on the side of the package layer away from the driving backplate, includes a driving electrode and an induction electrode insulated from each other, and can generate capacitance between the driving electrode and the induction electrode. A driving signal can be input to the driving electrode, and an induction signal can be obtained through the induction electrode. Since a passive object such as a finger or a passive pen can generate a coupling signal that affects the driving electrode or the induction electrode and the induction signal, when touching with a finger or a passive pen, the driving electrode or the induction electrode that changes can be determined by detecting the change in the induction signal, and the touch position can be determined. When touching with an active pen, the active pen itself can generate a coupling signal between the driving electrode and the induction electrode through the signal it generates, so that both the driving electrode and the induction electrode can receive the induction signal, and the touch position can be determined.

[0036] However, the hopping of the power signal of the second electrode causes a large noise in the induction signal of the touch layer, reducing the signal-to-noise ratio of the induction signal and affecting the accuracy of touch. As the size of the touch display panel becomes larger, the induction electrode and the driving electrode become longer, the area of ​​the second electrode and the touch layer becomes larger, and the resistance-capacitance loading (RC Loading) becomes larger, so the generated noise becomes larger, so the larger the touch display panel, the more difficult it is to improve the accuracy of touch.

[0037] Referring to Figure 1, the principle of occurrence of the above technical problem is shown, where TX is the driving electrode, RX is the induced electrode, Cm is the capacitance between the driving electrode TX and the induced electrode RX, R_TX is the resistance value of the driving electrode TX, R_RX is the resistance value of the induced electrode RX, VDD is the power signal of the active pen, Cf_TX is the capacitance generated between the active pen and the driving electrode TX, Cf_RX is the capacitance generated between the active pen and the induced electrode RX, Cp_TX is the capacitance generated between the second electrode and the driving electrode TX, Cp_RX is the capacitance generated between the second electrode and the induced electrode RX, and both Cp_RX and Cp_TX are coupling signals (capacitance) due to the power signal VSS of the second electrode, which are coupled to the received signal of the induced electrode RX as noise, and a sense signal Vnoise combined with noise is obtained.

[0038] Based on the above-mentioned related art, the inventors provide a touch display panel, which may include a display area AA and a peripheral area WA located outside the display area AA, as shown in Fig. 2, Fig. 5 to Fig. 7, and a part of the peripheral area WA protrudes in a direction away from the display area AA to form at least one pull-out area FA, and the pull-out area FA has a binding part BON. The touch display panel of the present disclosure may include a display substrate PNL, a touch layer TL, and a switching circuit SC, where: The touch layer TL is provided on one side of the display substrate PNL, and includes at least two touch islands TSI distributed in an array, and there is a gap Path between two adjacent touch islands TSI, and each touch island TSI includes at least two touch electrodes, and the touch electrodes include at least two induction electrodes for outputting induction signals; The switching circuits SC are at least partially provided in the peripheral area WA, and one touch island TSI is connected to the binding part BON via at least an induction electrode and one switching circuit SC for turning on or off the binding part BON.

[0039] The touch display panel of the embodiment of the present disclosure divides the touch layer TL into at least two touch islands TSI distributed at intervals, i.e., divides one large-area touch area into multiple independent small touch areas, and correspondingly reduces the area of ​​all touch electrodes, reduces their resistance-capacitance load, and makes the coupling signal (noise) to any touch island TSI of the display panel smaller than the coupling signal with the touch layer TL when it is not divided, so that the signal-to-noise ratio of each touch island TSI is increased and the touch accuracy is improved. In one touch period, the induced signal of each touch island TSI can be detected sequentially to determine the touch position. Of course, the touch island TSI can be divided into multiple sets, each set has at least one touch island TSI, and the induced signal of each set of touch islands TSI can be detected sequentially, and the touch position can be identified.

[0040] Next, the touch display panel of the present disclosure will be described in detail.

[0041] As shown in Fig. 2, the touch display panel of the present disclosure is divided into a display area AA and a peripheral area WA located outside the display area AA, and the peripheral area WA may be an annular area surrounding the display area AA. At the same time, a part of the peripheral area WA may extend away from the display area AA to form a pull-out area FA, and a binding part BON may be provided in the pull-out area FA, which may be bound to a flexible circuit board through the binding part BON, and the flexible circuit board may be connected to a control circuit board, and the touch display panel may be driven through the control circuit board area. In addition, the flexible circuit board or the control circuit board may be provided with a touch chip that receives an induction signal to determine a touch position and displays a specified image based on the touch position.

[0042] Details of the touch display panel are as follows.

[0043] The touch display panel includes a display portion and a touch portion, where the display portion is a display substrate PNL, and the touch portion includes a touch layer TL located on one side of the display substrate PNL.

[0044] First, the display substrate PNL will be described.

[0045] The display substrate PNL of the present disclosure may be a display substrate PNL using an organic electroluminescence diode as a light-emitting element, or may be a liquid crystal display substrate PNL or other display substrate PNL. Hereinafter, a display substrate PNL using an organic electroluminescence diode will be described as an example.

[0046] The display substrate PNL may include a driving backplate BP, an emission layer OL, and a package layer TFE, where the emission layer OL includes a plurality of light-emitting elements, the driving backplate BP can drive the emission of the light-emitting elements, and the package layer TFE covers the emission layer OL, where: The driving back plate BP is provided with a driving circuit that causes the light emitting elements to emit light in order to display an image. The drive backplate BP may include a substrate SU and a circuit layer located on one side of the substrate SU, and the substrate SU may be a flat structure, and the material may include a hard material such as glass, or a soft material such as polyimide.

[0047] The circuit layer may be provided on one side of the substrate SU and may include a driving circuit, through which the light-emitting element can be driven to emit light. For example, the driving circuit may include a pixel circuit located in the display area AA and a peripheral circuit located in the peripheral area WA, where the pixel circuit may be a 3T1C, 6T1C, 7T1C, or other pixel circuit, and may be capable of emitting light from the light-emitting element, and the structure is not particularly limited here. The number of pixel circuits may be the same as the number of light-emitting elements, and may be connected to each light-emitting element in one-to-one correspondence in order to individually control the emission of each light-emitting element. Here, nTmC indicates that one pixel circuit includes n transistors (represented by the alphabet "T") and m capacitances (represented by the alphabet "C"). Of course, multiple light-emitting elements can be connected to the same pixel circuit, and multiple light-emitting elements can be driven to emit light at the same time, but this is not particularly limited here.

[0048] The peripheral circuit is connected to the pixel circuit to input an electric signal to the pixel circuit and the light-emitting layer OL to control the light emission of the light-emitting element. For example, the light-emitting element may include a first electrode ANO, a light-emitting material layer EL, and a second electrode CAT, and the peripheral circuit may input a first power signal to the pixel circuit and a second power signal (VSS in FIG. 1) to the second electrode of the light-emitting element. The peripheral circuit may include a gate driving circuit and a light-emitting control circuit, and may of course include other circuits, but is not particularly limited to a specific structure of the peripheral circuit. The peripheral circuit may be connected to a flexible circuit board FPC via a binding part BON.

[0049] The circuit layer can include a plurality of thin film transistors and a storage capacitor, where the thin film transistors are top-gate or bottom-gate thin film transistors, and each thin film transistor can include an active layer and a gate. Take the top-gate thin film transistor as an example, as shown in FIG. 4, the circuit layer can include a semiconductor layer PL, a first gate insulating layer GI1, a first gate layer GA1, a second gate insulating layer GI2, a second gate layer GA2, an interlayer dielectric layer ILD, a first source-drain layer SD1, a first planar layer PLN1, a second source-drain layer SD2, and a second planar layer PLN2, where the semiconductor layer PL is provided on one side of the substrate SU, and a buffer layer can be provided between the semiconductor layer PL and the substrate SU, and the semiconductor layer PL can include the active layer of each thin film transistor. The first gate insulating layer GI1 covers the semiconductor layer PL. The first gate layer GA1 is provided on the surface of the gate insulating layer away from the substrate SU, and includes the gate of each thin film transistor and one plate of the storage capacitor. The second gate insulating layer GI2 covers the first gate layer GA1. The second gate layer GA2 is provided on a surface of the second gate insulating layer GI2 away from the substrate SU and includes another plate of the storage capacitance. The interlayer dielectric layer ILD can cover the second gate layer GA2. The first source drain layer SD1 is provided on a surface of the interlayer dielectric layer ILD away from the substrate SU. The first planar layer PLN1 can cover the first source drain layer SD1. The second source drain layer SD2 is provided on a surface of the first planar layer PLN1 away from the substrate SU and may include a first power line. The second planar layer PLN2 covers the second source drain layer SD2. The specific pattern of each film layer depends on the specific configuration of the driving circuit and is not particularly limited here.

[0050] As shown in FIG. 4, the light-emitting layer OL is provided on one side of the driving backplate BP and includes a light-emitting element and a pixel definition layer PDL for defining the range of the light-emitting element. For example, the pixel definition layer PDL and the light-emitting element may be provided on a surface of the second flat layer PLN2 away from the substrate SU. The orthogonal projection of each light-emitting element onto the driving backplate BP may be located in the display area AA, and the light-emitting layer OL may expose at least a part of the area of ​​the drawing area FA, that is, at least a part of the area in the drawing area FA may be free of the light-emitting element and the pixel definition layer. Each light-emitting element may include a first electrode ANO, a second electrode CAT, and a light-emitting material layer EL located between the first electrode ANO and the second electrode CAT, and the light emission of the light-emitting material layer EL can be excited by applying electric signals (a first power supply signal and a second power supply signal) to the first electrode ANO and the second electrode CAT. The light-emitting element may be an organic electroluminescence diode (OLED).

[0051] As shown in FIG. 4, the first electrodes ANO of each light-emitting element are distributed at intervals, and the first electrodes ANO function as the anodes of the light-emitting elements. The pixel definition layer PDL has an opening exposing each first electrode ANO, i.e., one opening is provided to expose one first electrode ANO. The pixel definition layer PDL can be used to define the range of each light-emitting element, the range of the opening, i.e., the range of the light-emitting element. The shape of the opening, i.e., the shape of the boundary of its orthogonal projection onto the driving backplate BP, may be a polygon such as a rectangle, a pentagon, a hexagon, etc., or may be an ellipse, a sector, or other shape, and the shape is not particularly limited here.

[0052] At least a portion of the light emitting material layer EL is located within the opening and is arranged to be stacked with the first electrode ANO. The light emitting material layer EL may include a hole injection layer, a hole transport layer, a light emitting material layer EL, an electron transport layer, and an electron injection layer, which are stacked in order in a direction away from the driving backplate BP. Of course, other structures may be adopted as long as they can cooperate with the first electrode ANO and the second electrode CAT to emit light.

[0053] The second electrode CAT can cover the light emitting material layer EL, and the second electrode CAT can be a continuous whole structure, so that each light emitting element can share the same second electrode CAT. At the same time, the second electrode CAT can be the cathode of the light emitting element, and can adopt a light-transmitting structure, so that the light emitting element can emit light in a direction away from the driving back plate BP, and for example, the material of the second electrode CAT can be metal magnesium, silver, or an alloy thereof, etc., and at a certain thickness, it can be conductive and transmit light at the same time. In addition, the first electrode ANO can be a structure that does not transmit light, so that the light emitting element has a top emission structure.

[0054] The second electrode CAT may extend into the peripheral area WA and be connected to a second power signal line, and may receive a second power signal. This second power signal line may be provided in the same layer as the first electrode ANO. When displaying an image, the pixel circuit controls the first electrode ANO to apply a first power signal, and the second electrode CAT is applied with a second power signal via the second power signal line, thereby exciting the emission of the light-emitting layer OL. The specific principle of electronic organic light emission is omitted here.

[0055] In some embodiments of the present disclosure, as shown in FIG. 4 , each light-emitting element can emit light independently, and the emission colors of different light-emitting elements can be different; specifically, the light-emitting material layer EL can include a plurality of light-emitting units distributed at intervals in one-to-one correspondence in each opening, and each light-emitting unit can emit light independently, and the emission colors can be different, thereby directly realizing color display; thus, the second electrode CAT not only covers the light-emitting material layer EL, but also covers the area not covered by the light-emitting material layer EL by the pixel defining layer PDL.

[0056] In some embodiments of the present disclosure, the light-emitting material layer EL can also cover the pixel definition layer PDL and each first electrode ANO at the same time, that is, each light-emitting element can share the same light-emitting material layer EL, in which case the emission color of each light-emitting element is the same, and in order to realize color display, a filter structure that transmits only monochromatic light can be provided on the side of the light-emitting element away from the driving backplate BP, and the colors of the filter structures corresponding to different light-emitting elements can be different, and each filter structure can form a color film layer.

[0057] As shown in Figure 4, the package layer TFE can be used to cover the light-emitting layer OL, protect the light-emitting layer OL, and prevent external water and oxygen from corroding the light-emitting device. For example, the package layer TFE can adopt thin film encapsulation and can include a first inorganic layer CVD1, an organic layer IJP, and a second inorganic layer CVD2, where: The first inorganic layer CVD1 can cover each light-emitting element, i.e., the first inorganic layer CVD1 can cover the surface of the second electrode CAT that is away from the driving backplate BP. The material of the first inorganic layer CVD1 can include inorganic insulating materials such as silicon nitride, silicon oxide, etc.

[0058] The organic layer IJP may be provided on the surface of the first inorganic layer CVD1 away from the driving backplate BP, and the boundary of the organic layer IJP can be limited to the inside of the boundary of the first inorganic layer CVD1 by a barrier dam located in the peripheral area WA, and the boundary of the orthogonal projection of the organic layer IJP onto the driving backplate BP can be located in the peripheral area WA, ensuring that the organic layer IJP can cover each light-emitting element. The material of the organic layer IJP can be an organic material such as a resin.

[0059] The second inorganic layer CVD2 can cover the organic layer IJP and the first inorganic layer CVD1 not covered by the organic layer IJP, and the second inorganic layer CVD2 can block the intrusion of oxygen, and the organic layer IJP having fluidity (manufacturing process) can achieve planarization. The material of the second inorganic layer CVD2 can include inorganic insulating materials such as silicon nitride and silicon oxide. Note that the color film layer mentioned in some of the above embodiments may be provided on the side of the package layer TFE away from the driving back plate BP.

[0060] The boundary of the packaging layer TFE can be within the peripheral area WA, but the lead-out area FA may be exposed, i.e. no packaging layer TFE is present within the lead-out area FA.

[0061] Next, the touch layer TL of the present disclosure will be described in detail.

[0062] As shown in FIG. 3, the touch layer TL may be provided on one side of the display substrate PNL, or may be provided directly on the surface of the package layer TFE away from the driving backplate BP, or a touch buffer layer TBU may be provided on the surface of the package layer TFE away from the driving backplate BP, where the touch buffer layer TL is provided on the surface of the touch buffer layer TBU away from the driving backplate BP, and the touch buffer layer TBU covers the area where the second flat layer PLN2 is located in the pull-out area FA, i.e., the touch buffer layer TBU and the second flat layer PLN2 are stacked in the second pull-out area FA.

[0063] As shown in Fig. 5 to Fig. 7 and Fig. 9, the touch layer TL may include at least two touch islands TSI distributed in an array, with a gap Path between two adjacent touch islands TSI, so that each touch island TSI is independent of each other. Each touch island TSI may include at least two touch electrodes, and the touch electrodes may include at least two induction electrodes for outputting induction signals. The touch layer TL may be exemplified as an interceptive touch structure using the principle of self-receptivity or interceptivity.

[0064] As shown in FIGS. 3 and 5 to 7, in some embodiments of the present disclosure, in the touch island TSI, The touch electrodes may include at least two first touch electrodes TX and at least two second touch electrodes RX, where any of the first touch electrodes TX may extend in a column direction Y and each of the first touch electrodes TX may be distributed at intervals along a row direction X. At the same time, any of the second touch electrodes RX may extend along the row direction X and each of the second touch electrodes RX may be distributed at intervals along the column direction Y. Any of the first touch electrodes TX crosses each of the second touch electrodes RX and is arranged in an insulated manner.

[0065] Furthermore, to realize the crossing and insulating arrangement of the first touch electrode TX and the second touch electrode RX, one first touch electrode TX may include at least two first electrode blocks TXc spaced apart from each other in the column direction Y and an adapter bridge BR connecting two adjacent first electrode blocks TXc, and the two adjacent first electrode blocks TXc may be connected via an adapter bridge BR extending along the column direction Y, or may be connected via a plurality of adapter bridges BR extending along the column direction Y and distributed along the row direction. One second touch electrode RX may include at least two second electrode blocks RXc connected in series along the row direction X. One adapter bridge BR is arranged to cross one second touch electrode RX so that the first touch electrode TX and the second touch electrode RX cross each other.

[0066] As shown in FIG. 3, for the above first touch electrode TX and second touch electrode RX, the touch layer TL may include an adapter layer BRL, a spacer layer IN and an electrode layer TMB, where: The adapter layer BRL may be provided on one side of the display substrate PNL, for example, the adapter layer BRL may be provided on a surface of the touch buffer layer TBU away from the driving backplate BP. At the same time, each adapter bridge BR may be located on the adapter layer BRL. The material of the adapter layer BRL may be metal or other conductive material.

[0067] A spacer layer IN may cover the adapter layer BRL, and the spacer layer IN may be an insulating material such as silicon nitride.

[0068] The electrode layer TMB is provided on the surface of the spacer layer IN away from the display substrate PNL, and can include the above-mentioned first electrode block TXc and second electrode block RXc, that is, the first electrode block TXc and the second electrode block RXc can be located in the same film layer and can be manufactured and formed at the same time, and the adjacent first electrode block TXc and the second electrode block RXc are distributed at intervals to form a capacitance. Note that one adjacent first electrode block TXc and one adjacent second electrode block RXc means that one first electrode block TXc and one adjacent second electrode block RXc do not have another first electrode block TXc and another second electrode block RXc.

[0069] As shown in FIG. 10, in order to reduce the shielding of the light emitted from the display substrate PNL, both the first touch electrode TX and the second touch electrode RX may be formed of a mesh structure formed by a plurality of channel lines XL, that is, the first electrode block TXc, the second electrode block RXc, and the adapter bridge BR may all be formed of a mesh structure. The mesh may have a polygonal shape such as a rhombus or a hexagon, and is not particularly limited here. The orthogonal projection of the channel line XL onto the driving backplate BP is located other than the orthogonal projection of the light emitting element onto the driving backplate BP, so that the channel line XL does not block the light emitting element, and the light emitted by the light emitting element can be emitted from the mesh.

[0070] When a passive object such as a finger or a passive pen touches, the first touch electrode TX can be a driving electrode that receives a driving signal, and the second touch electrode RX can be an inductive electrode that receives an inductive signal through the second touch electrode RX and finally transmits it to the touch chip. When an active object such as an active pen touches, the first touch electrode TX and the second touch electrode RX can both be inductive electrodes that transmit an inductive signal to the touch chip.

[0071] The structure of one touch island TSI has been described above, but the structure of the other touch islands TSI may be the same as the above structure, and each touch island TSI may be distributed in an array. At the same time, the number of touch electrodes in different touch islands TSI may be the same. As shown in FIG. 5 to FIG. 7, among two touch islands TSI adjacent to each other in the column direction Y, the first touch electrodes TX of one touch island TSI and the first pixel electrodes of the other touch island TSI are provided in one-to-one correspondence in the column direction Y, and the first electrode blocks TXc of the corresponding first touch electrodes TX have the same size and are located in the same column. Among two touch islands TSI adjacent to each other in the row direction X, the second touch electrodes RX of one touch island TSI and the second pixel electrodes of the other touch island TSI are provided in one-to-one correspondence in the row direction X, and the second electrode blocks RXc of the corresponding second touch electrodes RX have the same size and are located in the same row.

[0072] As shown in FIG. 5 to FIG. 7, the first touch electrodes TX in the same column of two adjacent touch islands TSI may be formed by cutting the first electrode blocks TXc of the continuous first touch electrodes TX by a gap Path. The second touch electrodes RX in the same row of two adjacent touch islands TSI may be formed by cutting the second electrode blocks RXc of the continuous second touch electrodes RX by a gap Path. That is, the gap Path does not completely cut the touch layer TL in the thickness direction, but is located in the electrode layer TMB and may divide the touch islands TSI that are functionally independent from each other. Therefore, as shown in FIG. 6 and FIG. 7, the gap Path includes at least one first gap Path1 and at least one second gap Path2, the first gap Path1 may extend in the column direction Y, the second gap Path2 may extend in the row direction X, and the second gap Path2 may cross the first gap Path1 to thereby divide a plurality of touch islands TSI.

[0073] Of course, the gap Path may be only the first gap Path1 or the second gap Path2, that is, the number of touch islands TSI is not particularly limited here, for example, the number of touch islands TSI may be two or four.

[0074] As shown in Fig. 10, Fig. 10 shows the trajectory of the gap Path, and the gap Path can extend along a curved or broken line trajectory, which can be formed by cutting a part of the channel line XL, and the extension of the curved or broken line can play the role of blanking that is difficult to visually observe. Of course, the gap Path can also extend along a straight line trajectory.

[0075] As shown in Fig. 5 to Fig. 7, in order to easily control the operation sequence of each touch island TSI, a switching circuit SC is provided in each touch island TSI, and the induction electrode and the binding part BON of the touch island TSI are connected through the switching circuit SC, and the acquisition of the induction signal can be started or stopped by controlling the on or off of the induction electrode and the binding part BON, thereby controlling whether the touch island TSI realizes the touch function. Specifically, when the touch function of the touch island TSI is turned on, the induction electrode and the binding part BON can be turned on, so that the induction signal can be transmitted to the touch chip through the binding part BON, and when the touch function of the touch island TSI is turned off, the induction electrode and the binding part BON can be turned off, at this time, the touch island TSI cannot transmit the induction signal to the touch chip, and therefore cannot realize the touch function.

[0076] As shown in Figures 5 to 7, the switching circuit SC is at least partially provided in the peripheral area WA, and one touch island TSI is connected to one switching circuit SC via one binding part BON. When there is only one pull-out area FA and one binding part BON in the peripheral area below, one touch island TSI and its connected switching circuit SC will be used as an example to explain the case.

[0077] The switching circuit SC may include at least two touch leads TSL and a switching element, and any touch electrode may be connected to the binding part BON through at least one touch lead TSL. For example, one touch electrode may be connected to the binding part BON through two touch leads TSL, and the two touch leads TSL may be connected to both ends of the touch electrode in the extending direction, or one touch electrode may be connected to the binding part BON through one touch lead TSL. At the same time, a switching element may be provided in the touch lead TSL connecting the induction electrode. Specifically, as shown in FIG. 5 to FIG. 7, the touch lead TSL includes two lead segments SEG, one lead segment SEG connects the touch electrode and the switching element, and the other lead segment SEG connects the switching element and the binding part BON. The switching element can turn on or off the touch lead TSL connected thereto in response to a control signal.

[0078] Furthermore, the above-mentioned switching element may be a switching transistor T or a thin film transistor as shown in Figures 5 to 7, and this thin film transistor may be an N-type thin film transistor that can be turned on under a high level signal, or of course, it may be a P-type transistor that can be turned on by a low level signal.

[0079] The first pole SL and the second pole DL of the switching transistor T are connected to a touch lead TSL, i.e., one lead segment SEG of the touch lead TSL connects the first pole SL of the switching transistor T to the induction electrode, and the other lead segment SEG connects the second pole DL of the switching transistor T to the binding part BON. The gate of the switching transistor T is used to receive a control signal to turn on the first pole SL and the second pole DL.

[0080] In some embodiments of the present disclosure, as shown in Fig. 5 to Fig. 7, the first touch electrode TX is a drive electrode for receiving a drive signal, and the second touch electrode RX is an induction electrode for outputting an induced signal. The touch lead TSL connecting the first touch electrode TX may not be provided with a switch unit, and the touch lead TSL connecting the second touch electrode RX may be provided with a switch unit. Of course, each touch lead TSL may be provided with a switch unit, that is, each touch lead TSL in the switching circuit SC may be provided with a switch unit, and not only the output of the induced signal but also the input of the drive signal can be controlled.

[0081] In another embodiment of the present disclosure, each touch electrode is an induction electrode, and each can output an induction signal, for example, when an active pen is used to touch, the first touch electrode TX and the second touch electrode RX can both generate an induction signal. In this case, each touch lead TSL may be provided with a switch unit.

[0082] 5 to 7, in order to facilitate the on / off control of the touch island TSI, the switching circuit SC may also include a switch scanning line SW, in which the switch scanning line SW connects the gates of each switching transistor T in series and is connected to the binding unit BON to transmit a control signal, so that all the switching transistors T in the switching circuit SC can be simultaneously turned on or off. Of course, a plurality of switch scanning lines SW may be provided, and each switch scanning line SW may be connected to the switching gates SGA of some of the switching transistors T.

[0083] As shown in Figures 2 and 12, the binding part BON includes at least two pads, one touch lead TSL connects one pad PAD, and one switch scanning line SW also connects one pad PAD, and each pad PAD can be bound to a flexible circuit board, so that the touch chip can transmit and receive signals to the touch electrode through the flexible circuit board.

[0084] In another embodiment of the present disclosure, as shown in FIG. 7, there may be multiple pull-out areas FA and a binding section BON may be provided in each pull-out area FA, in which case the binding sections BON connected to different touch islands TSI may be different, for example, two pull-out areas FA may be provided, each having two corresponding binding sections BON, and some touch islands TSI may be connected to one binding section BON via a switching circuit SC, and the binding sections BON of other parts may be connected to other binding sections BON via a switching circuit SC.

[0085] Next, the stack structure using the switching transistor T will be described in detail.

[0086] As shown in FIGS. 11 and 12, the switching transistor T may include a switching active layer ACT and a switching gate SGA. In order to reduce the thickness, at least a part of the switching transistor T may be located in the display substrate PNL, and at least a part of the switching transistor T may be formed at the same time as forming the display substrate PNL. As shown in FIG. 13, for example, the touch display panel may include a switching active layer ACT, a first insulating layer INL1, a switching gate SGA, and a second insulating layer INL2, where: The switching active layer ACT may be provided in the display substrate PNL, and the switching active layer ACT may include a channel region CH and a first pole SL and a second pole DL located on either side of the channel region CH, and the first pole SL and the second pole DL may be formed by a doping process of a semiconductor material.

[0087] The first insulating layer INL1 may cover the active layer. The first insulating layer INL1 may be a single layer or a multi-layer structure, and the material may include insulating materials such as silicon nitride, silicon oxide, etc.

[0088] The switching gate SGA may be provided on a surface of the first insulating layer INL1 away from the switching active layer ACT and overlaps with the switching active layer ACT, i.e. the orthogonal projection of the switching gate SGA onto the substrate SU and the orthogonal projection of the channel region CH of the switching active layer ACT onto the substrate SU at least partially overlap. At the same time, the first pole SL and the second pole DL of the switching active layer ACT do not overlap with the switching gate SGA. The switching gate SGA can be connected to a switch scan line SW to receive a switch scan signal.

[0089] The second insulating layer INL2 can cover the switching gate SGA and can be a single layer or a multi-layer structure, and its material can include insulating materials such as silicon nitride, silicon oxide, and so on.

[0090] 12, each switching transistor T may be located in the lead-out area FA and between the binding part BON and the display area AA. The touch lead TSL is located on the side of the second insulating layer INL2 away from the switching active layer ACT and includes two lead segments SEG spaced apart from each other and distributed along the column direction Y, where one lead segment SEG may connect the touch electrode and the first pole SL and the other lead segment SEG may connect the second pole DL and the binding part BON.

[0091] Also, as shown in FIG. 11, FIG. 12 and FIG. 14, the touch display panel may include a first conductive layer CL, a third insulating layer INL3, a second conductive layer BL and a fourth insulating layer INL4, where: The first conductive layer CL may be provided on a surface of the second insulating layer INL2 facing away from the switching active layer ACT and may include first conductive portions CL1 and second conductive portions CL2 distributed at intervals along the column direction Y. The first conductive portion CL1 overlaps the first pole SL, i.e. the orthogonal projection of the first conductive portion CL1 onto the substrate SU at least partially overlaps the orthogonal projection of the first pole SL onto the substrate SU, and the second conductive portion CL2 overlaps the second pole DL, i.e. the orthogonal projection of the second conductive portion CL2 onto the substrate SU at least partially overlaps the orthogonal projection of the second pole DL onto the substrate SU. In addition, the second insulating layer INL2 may be provided with a first contact hole HOL1 and a second contact hole HOL2 penetrating the second insulating layer INL2, and the first conductive portion CL1 and the first pole SL may be connected via the first contact hole HOL1, and the second conductive portion CL2 and the second pole DL may be connected via the second contact hole HOL2.

[0092] Furthermore, as shown in FIGS. 11 and 13 , in some embodiments of the present disclosure, the first conductive portion CL1 includes a first connection portion CL1X and a second connection portion CL1Y connected in the column direction Y, the first connection portion CL1X extends along the row direction X, overlaps with the first pole SL and is connected via the first contact hole HOL1, and the second connection portion CL1Y is connected to the side of the first connection portion CL1X away from the second conductive portion CL2 and extends in the column direction Y to form a “T” structure with the first connection portion CL1X.

[0093] The second conductive portion CL2 includes a third connection portion CL2X and a fourth connection portion CL2Y connected in the column direction Y, and the third connection portion CL2X extends in the row direction X, overlaps with the second pole DL, and is connected through the second contact hole HOL2. The fourth connection portion CL2Y is connected to the side of the third connection portion CL2X away from the first conductive portion CL1, and extends in the column direction Y to form a “T” structure with the third connection portion CL2X.

[0094] The third insulating layer INL3 may cover the first conductive layer CL, and the third insulating layer INL3 may be a single layer or multilayer structure that may include an inorganic insulating material such as silicon nitride or silicon oxide, or an organic insulating material such as resin.

[0095] The second conductive layer BL can be provided on the side of the first conductive layer CL away from the switching active layer ACT, and includes a third conductive portion BL1 and a fourth conductive portion BL2 distributed at intervals along the column direction Y, the third conductive portion BL1 overlaps the first conductive portion CL1, i.e., the orthogonal projection of the third conductive portion BL1 onto the substrate SU and the orthogonal projection of the first conductive portion CL1 onto the substrate SU at least partially overlap, and the fourth conductive portion BL2 overlaps the second conductive portion CL2, i.e., the orthogonal projection of the fourth conductive portion BL2 onto the substrate SU and the orthogonal projection of the second conductive portion CL2 onto the substrate SU at least partially overlap. At the same time, the third conductive portion BL1 and the first conductive portion CL1 can be connected via contact holes, and the fourth conductive portion BL2 and the second conductive portion CL2 can be connected via contact holes.

[0096] As shown in FIG. 11, the second connection portion CL1Y and the third conductive portion BL1 are connected via a contact hole, and the fourth connection portion CL2Y and the fourth conductive portion BL2 are connected via a contact hole.

[0097] The fourth insulating layer INL4 can cover the second conductive layer BL, and the fourth insulating layer INL4 may be a single layer or a multi-layer structure, and its material may include an inorganic insulating material such as silicon nitride or silicon oxide, or an organic insulating material such as resin.

[0098] As shown in Figures 2, 12 and 14, the adapter layer BRL of the touch layer TL can be located in the display area AA, and the touch lead TSL can be located on the side of the fourth insulating layer INL4 away from the switching active layer ACT, with one lead segment SEG connected to the first pole SL via the third conductive portion BL1 and the first conductive portion CL1, and the other lead segment SEG connected to the second pole DL via the fourth conductive portion BL2 and the second conductive portion CL2, thereby connecting the touch lead TSL to the switching transistor T.

[0099] In addition, in order to simplify the process, reduce the cost, and avoid increasing the thickness of the touch display panel, the partial film layer of the display substrate PNL can be formed simultaneously with the above switching active layer ACT to the fourth insulating layer INL4, as shown in FIG. 3, FIG. 4, FIG. 13, and FIG. 14, for example, the switching active layer ACT can be located in the semiconductor layer PL of the driving back plate BP and can be formed simultaneously with the semiconductor layer PL, that is, the switching active layer ACT and the active layer of each transistor of the pixel circuit are all located in the semiconductor layer PL. The first insulating layer INL1 can be located in the first gate insulating layer GI1 of the display substrate PNL and can be formed simultaneously with the first gate insulating layer GI1. The switching gate SGA can be located in the first gate layer GA1 and can therefore be formed simultaneously with the first gate layer GA1. The second insulating layer INL2 may be a multi-layer structure, in which the second gate insulating layer GI2 and the interlayer dielectric layer ILD extend into the pull-out region FA and are stacked in the pull-out region FA, the second insulating layer INL2 includes the second gate insulating layer GI2 and the interlayer dielectric layer ILD stacked in the pull-out region FA, and the second insulating layer INL2 includes a portion of the second gate insulating layer GI2 and a local portion of the interlayer dielectric layer ILD.

[0100] The first conductive layer CL can be located in the first source drain layer SD1 and can be formed simultaneously with the first source drain layer SD1. The third insulating layer INL3 can be located in the first flat layer PLN1, and the third insulating layer INL3 is a portion of the first flat layer PLN1 located in the lead-out region FA and can be formed simultaneously. The second conductive layer BL can be located in the second source drain layer SD2 and can be formed simultaneously with the second source drain layer SD2. The second flat layer PLN2 and the touch buffer layer TBU both extend in the lead-out region FA and can be stacked and arranged in the lead-out region FA, and the fourth insulating layer INL4 may be a multi-layer structure and includes the second flat layer PLN2 and a portion where the touch buffer layer TBU is stacked in the lead-out region FA, that is, the fourth insulating layer INL4 can include a part of the second flat layer PLN2 and a part of the touch buffer layer TBU. The touch lead TSL is located on the surface of the touch buffer layer TBU that is away from the substrate SU, and may be disposed in the same layer as the electrode layer TMB.

[0101] Also, as shown in Figures 3, 4, 12 and 14, the pad PAD of the binding part BON can adopt a multi-layer structure. For example, the pad includes three conductive film layers located in the same layer as the first gate layer GA1, the first source drain layer SD1 and the electrode layer TMB, and the three conductive film layers are connected, the touch lead TSL is located in the same layer as the electrode layer TMB, and the lead segment SEG connecting the pad PAD is integral with the conductive film layer in the same layer as the electrode layer TMB of the pad PAD, and when binding to a flexible circuit board, the flexible circuit board is conductively connected to the conductive film layer in the same layer as the electrode layer TMB of the pad PAD.

[0102] Next, as an example of the switching transistor T, the pattern of its partial film layers will be described in detail.

[0103] 11, 13 and 14, the switching active layer ACT can extend along the row direction X, the first pole SL and the second pole DL can be distributed on both sides of the channel region CH along the column direction Y, and the second pole DL is located between the channel region CH and the binding part BON. At the same time, the first pole SL and the second pole DL can both extend along the row direction X, and have the same length in the row direction X.

[0104] The switch scan line SW may be integral with the switching gate SGA and extends at least partially along the row direction X to overlap the channel region CH of the switching active layer ACT to form the switching transistor T.

[0105] The number of first contact holes HOL1 connecting the first connection portion CL1X and the first pole SL can be at least two and distributed at intervals along the row direction X, and the number of second contact holes HOL2 connecting the third connection portion CL2X and the second pole DL can be at least two and distributed at intervals along the row direction X. The at least two first contact holes HOL1 and second contact holes HOL2 can increase the connection area and improve the conductivity.

[0106] As shown in Fig. 11, the length of the switching active layer ACT in the row direction X is larger than the width of the touch lead TSL in the row direction X, larger than the width of the third conductive portion BL1 and the fourth conductive portion BL2 in the row direction X, and larger than the width of the second connecting portion CL1Y and the fourth connecting portion CL2Y in the row direction X, thereby increasing the channel length. The switching active layer ACT may be an integral structure, or may include at least two active portions ACTc distributed at intervals along the row direction X, and each active portion ACTc is connected to the first conductive portion CL1 and the second conductive portion CL2, thereby avoiding the appearance of a semiconductor material with an excessively large area. The distance between two adjacent active portions ACTc is smaller than the width of the touch lead TSL in the row direction X.

[0107] Through experimental verification, the inventors have found that the present disclosure can improve the signal-to-noise ratio and improve the problem of poor touch control accuracy. The specific experimental results are shown in the table below.

[0108] [Table 1]

[0109] The above table shows experimental data using active pen touch for three sizes (8.1 inch, 14.2 inch, 17.3 inch) of a mode not adopting the present disclosure and a mode adopting the present disclosure, where: Channel refers to the length of the touch electrode in the column direction, and Trace refers to the length of the touch lead. Cp-nomal is the coupling capacitance (noise) between the display substrate PNL and the touch electrode when the method of the present disclosure is not adopted, and Cp area detection is the coupling capacitance (noise) between the display substrate PNL and the touch electrode when the embodiment of the present disclosure is used, The active pen SNR-nomial is the signal-to-noise ratio when touching with an active pen when the present disclosure is not adopted, and the active pen SNR area detection is detecting the signal-to-noise ratio when touching with an active pen in an embodiment adopting the present disclosure; From the data in the above table, it can be seen that as the size of the touch display panel increases, the channel increases, the noise Vnoise in the active pen SNR-nominal increases, and the active pen SNR-nominal decreases. After adopting the present disclosure, the noise Vnoise in the active pen SNR-nominal decreases obviously, which can increase the active pen SNR area detection and make it more than twice the active pen SNR-nominal.

[0110] The present disclosure provides a driving method for a touch display panel, which is the touch display panel of any of the above embodiments, and the configuration thereof is not described in detail here. At the same time, the touch islands of the touch display panel can be divided into multiple sets, and the number of the touch islands of each set is one or more.

[0111] The driving method of the present disclosure includes the following steps.

[0112] Within one touch cycle, the switching circuits of the touch islands and binding section of each set are turned on sequentially, and the induced signals generated in the touch islands of each set are acquired sequentially.

[0113] The touch position is determined based on the induction signal.

[0114] That is, in one touch cycle, only the induction signals of one set of touch islands are received at the same timing, and one touch cycle ends after the touch signals of each set of touch islands are received in sequence.

[0115] Specifically, within one touch cycle, only each switching transistor T of the switching circuit SC of one set of touch islands TSI can be turned on at the same timing. In this case, the touch chip cannot receive the induced signal of the touch islands TSI of other sets, and cannot output the driving signal to other touch islands TSI if the touch lead TSL of each touch electrode is connected to the switching transistor T.

[0116] In some embodiments of the present disclosure, as shown in Figures 6 and 7, the number of touch islands is four, one touch island TSI is one set, and correspondingly, the number of switching circuits SC is also four, and the switching transistors T of each switching circuit are connected in series by one switch scanning line SW, and each switching transistor T is P-type, so the number of switch scanning lines SW is four, that is, SW1, SW2, SW3 and SW4 in Figures 6 and 7, and thus, by sequentially inputting control signals to each switch scanning line SW, it can be controlled to sequentially output induction signals to each touch island TSI.

[0117] As shown in Figure 8, the timing of the control signals for each switch scanning line (SW1, SW2, SW3, SW4) within the same touch cycle is shown, and according to the timing shown in Figure 8, the touch islands TSI to which each switch scanning line SW1, SW2, SW3, SW4 is connected are activated sequentially, and it can be seen that each touch island TSI set includes one touch island TSI.

[0118] In another embodiment of the present disclosure, the two touch islands TSI are one set, the positions of the two touch islands TSI in the same set are not particularly limited, and the switch scanning lines SW of the switching circuits SC of the touch islands TSI in the same set receive control signals simultaneously, thereby allowing the two touch islands TSI to output induction signals simultaneously.

[0119] As shown in FIG. 9, the timing of the control signals of each switch scanning line (SW1, SW2, SW3, SW4) within the same touch cycle is shown. According to the timing shown in FIG. 9, the touch island TSI to which the switch scanning lines SW1 and SW3 are connected forms one set and activates simultaneously, and the touch island TSI to which the switch scanning lines SW2 and SW4 are connected forms one set and activates simultaneously.

[0120] It should be noted that although the figures depict steps of the driving methods of the present disclosure in a particular order, this does not require or imply that the steps must be performed in this particular order or that all of the steps depicted must be performed to achieve the desired results. Additionally or alternatively, some steps may be omitted, multiple steps may be merged into a single step execution, or a single step may be broken down into multiple step executions.

[0121] As shown in FIG. 15, an embodiment of the present disclosure further provides a display device, which can include a touch display panel, a flexible circuit board FPC, and a touch chip TIC, wherein: The touch display panel may be any of the above-mentioned embodiments of the touch display panel, and the specific configuration thereof is not described here. The flexible circuit board FPC has one end connected to the binding part BON and the other end connected to the control circuit board MB, and can control the touch display panel through the control circuit board MB. The touch chip TIC can be provided on the flexible circuit board FPC or the control board MB, but must be connected to the flexible circuit board FPC to receive the induction signal and determine the touch position.

[0122] In some embodiments of the present disclosure, the display substrate PNL and the touch layer TL can be folded in the pull-out region such that the binding portion BON is located on the side of the display substrate PNL that is away from the touch layer TL.

[0123] Of course, in other embodiments of the present disclosure, the display substrate PNL may not be folded, but the flexible circuit board FPC may be folded so that the binding portion BON is located on the side of the display substrate PNL that is away from the touch layer TL. Alternatively, neither the display substrate PNL nor the flexible circuit board FPC is folded.

[0124] The display device of the present disclosure may be an electronic device with a touch display function, such as a mobile phone, a tablet, a television, etc., which will not generally be enumerated here, but its beneficial effects can be referred to the above embodiments of the touch display panel, and the description will be omitted here.

[0125] Additionally, the present disclosure provides a touch display system that can include a display device and a touch pen, which can be an active pen or a passive pen.

[0126] Other embodiments of the present disclosure will be readily conceivable to those skilled in the art after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses or adaptations of the present disclosure in accordance with the general principles of the present disclosure, including common knowledge or customary technical means known in the art that are not disclosed in the present disclosure. The specification and embodiments are considered to be merely exemplary, with the true scope and spirit of the present disclosure being indicated by the appended claims. [Explanation of symbols]

[0127] AA display area ACT Switching active layer ACTc active part ANO First electrode BL Second conductive layer BL1 Third conductive part BL2 4th conductive part BON Binding section BP Drive Backplate BR Adapter Bridge BRL Adapter Layer CAT 2nd electrode CH Channel Region CL First conductive layer CL1 First conductive part CL1X 1st Connection CL1Y Second Connection CL2 Second conductive part CL2X 3rd Connection CL2Y 4th Connection CVD1 First inorganic layer CVD2 Second inorganic layer DL Second Pole EL light-emitting material layer FA area FPC Flexible Circuit Board GA1 First gate layer GA2 Second gate layer GI1 First gate insulating layer GI2 Second gate insulating layer HOL1 First contact hole HOL2 Second contact hole IJP organic layer ILD Interlayer Dielectric Layer IN spacer layer INL1 First insulating layer INL2 Second insulating layer INL3 Third insulating layer INL4 Fourth insulating layer MB Control Board OL Light-emitting layer Path Gap Path1 First gap Path2 Second gap PDL Pixel Definition Layer PL semiconductor layer PLN1 First flat layer PLN2 Second Planar Layer PNL display board RX induction electrode RXc Second electrode block SC switching circuit SD1 First source / drain layer SD2 Second source / drain layer SEG Lead Segment SGA Switching Gate SL First Pole SNR Active Pen SU Substrate SW Switch scan line SW1 switch scan line SW2 switch scan line SW3 switch scan line SW4 switch scan line TBU Touch Buffer Layer TFE Package Layer TIC Touch Chip TL Touch Layer TMB electrode layer TSI Touch Island TSL Touch Lead TX drive electrode WA Surrounding Areas

Claims

1. A touch display panel including a display area and a peripheral area located outside the display area, a portion of the peripheral region protruding in a direction away from the display region to form at least one pull-out region, the pull-out region having a binding portion; The touch display panel includes a display substrate, a touch layer, and a switching circuit; The touch layer is provided on one side of the display substrate, and includes at least two touch islands distributed in an array, with a gap between two adjacent touch islands, each of the touch islands includes at least two touch electrodes, and the touch electrodes include at least two induction electrodes for outputting induction signals; At least a part of the switching circuit is provided in the peripheral region, and one of the touch islands is connected to the binding portion via one of the switching circuits, and the switching circuit is used to at least turn on or off the induction electrode and the binding portion. A touch display panel comprising:

2. The switching circuit includes at least two touch leads and a switching element, and any one of the touch electrodes is connected to the binding portion via one of the touch leads; The switching element is provided on a touch lead connected to the induction electrode, and the switching element is used to turn on or off the touch lead connected thereto in response to a control signal. The touch display panel according to claim 1 .

3. The switching element is a switching transistor, a first pole and a second pole of one of the switching transistors are connected to one of the touch leads, and a gate of the switching transistor is used to receive the control signal. The touch display panel according to claim 2 .

4. The switching circuit further includes a switch scan line, in which the switch scan line connects the gates of the switching transistors in series, is connected to the binding section, and is used to transmit the control signal. The touch display panel according to claim 3 .

5. The touch display panel includes a switching active layer, a first insulating layer, a switching gate, and a second insulating layer; the switching active layer is provided on the display substrate and includes a channel region and the first pole and the second pole located on both sides of the channel region; the first insulating layer covers the active layer; the switching gate is provided on a surface of the first insulating layer away from the switching active layer and overlaps with the switching active layer to form the switching transistor, the switching gate is connected to the switch scan line; the second insulating layer covers the switching gate; The touch lead is located on a side of the second insulating layer away from the switching active layer and includes two lead segments spaced apart along the column direction, one of the lead segments connecting the touch electrode to the first pole and the other lead segment connecting the second pole to the binding portion. The touch display panel according to claim 3 .

6. the switching active layer extends along a row direction, the first pole and the second pole are located on both sides of the channel region along a column direction, and the second pole is located between the channel region and the binding portion; The switch scanning line and the switching gate are integral with each other, extend along the row direction, and overlap with the channel region of the switching active layer. The touch display panel according to claim 5 .

7. The touch display panel further includes a first conductive layer, a third insulating layer, a second conductive layer, and a fourth insulating layer; the first conductive layer is provided on a surface of the second insulating layer away from the switching active layer, and includes a first conductive portion and a second conductive portion distributed at intervals along the column direction, the first conductive portion and the first pole overlapping each other and being connected via a first contact hole, and the second conductive portion and the second pole overlapping each other and being connected via a second contact hole; the third insulating layer covers the first conductive layer; the second conductive layer is provided on a surface of the third insulating layer away from the switching active layer, and includes a third conductive portion and a fourth conductive portion that are distributed at intervals along the column direction, the third conductive portion and the first conductive portion overlapping and connected, and the fourth conductive portion and the second conductive portion overlapping and connected, a fourth insulating layer covering the second conductive layer; The touch lead is located on a side of the fourth insulating layer away from the switching active layer, and the lead segment connected to the touch electrode is connected to the third conductive portion, and the lead segment connected to the binding portion is connected to the fourth conductive portion. The touch display panel according to claim 6 .

8. the first conductive portion includes a first connection portion and a second connection portion connected along the column direction, the first connection portion extends along the row direction, overlaps with the first pole, and is connected via the first contact hole, the second connection portion is connected to a side of the first connection portion away from the second conductive portion, extends along the column direction, and the second connection portion is connected to the third conductive portion, The second conductive portion includes a third connection portion and a fourth connection portion connected along the column direction, the third connection portion extends along the row direction, overlaps with the second pole, and is connected via the second contact hole, the fourth connection portion is connected to a side of the third connection portion away from the first conductive portion, extends along the column direction, and the fourth connection portion is connected to the fourth conductive portion. The touch display panel according to claim 7 .

9. The first connection portion is connected to the first pole via at least two first contact holes distributed at intervals along the row direction, and the second connection portion is connected to the second pole via at least two second contact holes distributed at intervals along the row direction. The touch display panel according to claim 8 .

10. A length of the switching active layer in the row direction is greater than widths of the touch lead, the second connecting portion, the fourth connecting portion, the third conductive portion, and the fourth conductive portion in the row direction. The touch display panel according to claim 8 .

11. The switching active layer includes at least two active portions spaced apart from each other along the row direction, and each of the active portions overlaps the switch scan line and is connected to the first conductive portion and the second conductive portion. The touch display panel according to claim 7 .

12. The display substrate includes a driving back plate, a light emitting layer, and a package layer, which are sequentially stacked, and the touch layer is located on a side of the package layer away from the driving back plate; The driving backplate includes a substrate, a semiconductor layer, a first gate insulating layer, a first gate layer, a second gate insulating layer, a second gate layer, an interlayer dielectric layer, a first source drain layer, a first planar layer, a second source drain layer, a second planar layer, and a touch buffer layer; the semiconductor layer is disposed on a side of the substrate, the switching active layer being located in the semiconductor layer; the first gate insulating layer covers the semiconductor layer, the first insulating layer is located on the gate insulating layer; the first gate layer is provided on a surface of the gate insulating layer away from the substrate, and the switching gate is located in the first gate layer; the second gate insulating layer covers the first gate layer; the second gate layer is provided on a surface of the second gate insulating layer away from the substrate; the interlayer dielectric layer covers the second gate layer, the second insulating layer including a portion of the gate insulating layer and a portion of the interlayer dielectric layer; the first source-drain layer is provided on a surface of the interlayer dielectric layer away from the substrate, and the first conductive layer is located on the first source-drain layer; the first planar layer covers the first source-drain layer, and the third insulating layer is located on the first planar layer; the second source-drain layer is provided on a surface of the first planar layer away from the substrate, and the second conductive layer is located on the second source-drain layer; the second planar layer covers the second source-drain layer, the light-emitting layer is provided on a surface of the second planar layer away from the substrate, and both the light-emitting layer and the package layer are exposed from the drawing region; The touch buffer layer covers the light emitting layer and the region of the second planar layer located in the leading region, the touch layer is provided on a surface of the touch buffer layer away from the substrate, and the fourth insulating layer includes a part of the second planar layer and a part of the touch buffer layer. The touch display panel according to claim 7 .

13. The binding portion includes at least two pads, one of the touch leads is connected to one of the pads, and the switch scan line is connected to one of the pads. The touch display panel according to claim 12 .

14. In one of the touch islands, The touch electrodes include at least two first touch electrodes and at least two second touch electrodes, the first touch electrodes extend along a column direction and are distributed at intervals along a row direction, the second touch electrodes extend along the row direction and are distributed at intervals along the column direction, and each of the first touch electrodes is arranged to intersect and be insulated from each of the second touch electrodes; The first touch electrode is a drive electrode for receiving a drive signal, and the second touch electrode is the induction electrode.

14. The touch display panel according to claim 1, wherein the first and second electrodes are disposed on the first and second surfaces of the touch panel.

15. Each of the touch electrodes is an induction electrode.

14. The touch display panel according to claim 1, wherein the first and second electrodes are disposed on the first and second surfaces of the touch panel.

16. Each of the first touch electrodes includes at least two first electrode blocks spaced apart from each other along a column direction and an adapter bridge connecting two adjacent first electrode blocks, and each of the second touch electrodes includes at least two second electrode blocks connected in series along the row direction, and each of the adapter bridges is provided to cross one of the second touch electrodes; the touch layer includes an adapter layer, a spacer layer, and an electrode layer; the adapter layer is disposed on one side of the display substrate and includes the adapter bridge; the spacer layer covers the adapter layer; The electrode layer is provided on a surface of the spacer layer that is away from the display substrate, and includes the first electrode block and the second electrode block. The touch display panel according to claim 14 .

17. The gap is located in the electrode layer and cuts a portion of the first electrode block and a portion of the second electrode block. The touch display panel according to claim 16 .

18. The gaps include at least one first gap and at least one second gap, the first gap extending along the column direction, and the second gap extending along the row direction and intersecting the first gap. The touch display panel according to any one of claims 1 to 17.

19. The gap extends along a curved or broken line path. The touch display panel according to any one of claims 1 to 17.

20. A method for driving a touch display panel, comprising: The touch display panel is the touch display panel according to any one of claims 1 to 19, and includes a plurality of sets of touch islands, and the number of the touch islands in each set is one or more; The driving method includes: In one touch period, the switching circuits of the touch islands and the binding unit of each set are sequentially turned on, and the induction signals generated in the touch islands of each set are sequentially obtained; determining a touch position based on the induced signal. A method for driving a touch display panel comprising the steps of:

21. A display device including a touch display panel, a flexible circuit board, and a touch chip, The touch display panel is a touch display panel according to any one of claims 1 to 19, the flexible circuit board is connected to the binding portion; The touch chip is connected to the flexible circuit board. A display device comprising:

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