Touch display panel and touch display device

Abstract

The application provides a touch display panel with reduced capacitive load and a touch display device. The touch display panel comprises an array substrate, a display medium layer and an encapsulation substrate which are sequentially stacked. The encapsulation substrate comprises a first surface and a second surface which are oppositely arranged. The first surface is adjacent to the display medium layer, and the second surface is away from the display medium layer. The second surface sequentially stacks a first metal layer and a second metal layer which are insulated from each other. The first metal layer comprises a plurality of first conductive patterns which extend along a first direction. The plurality of first conductive patterns are arranged at a preset distance along a second direction. The first direction is perpendicular to the second direction. The second metal layer comprises a plurality of second conductive patterns which extend along the second direction. The plurality of second conductive patterns are arranged at a preset distance along the first direction. The first conductive patterns and the second conductive patterns partially overlap to form mutual capacitive sensing capacitors, and output a first sensing signal when a touch operation is sensed.

Description

Technical Field

[0001] This application relates to the field of touch display, and more particularly to a touch display panel and a touch display device. Background Technology

[0002] Currently, interactive electronic devices typically include touch display panels. The touch structure within these panels comprises multiple sensing electrodes. For capacitive touch structures, the area of ​​the sensing electrodes affects the corresponding capacitance value. Larger touch display panels have more sensing electrodes. Due to the greater number of electrodes, the area of ​​the touch electrodes facing the display electrodes is larger, resulting in a larger capacitive load between the touch electrodes and the display electrodes. This, in turn, increases the driving load on the touch control module (touch sensing integrated circuit) connected to the touch traces. Summary of the Invention

[0003] To address the aforementioned technical problems, embodiments of this application provide a touch display panel and a touch display device with a lighter capacitive load.

[0004] In one embodiment of this application, a touch display panel includes an array substrate, a display medium layer, and an encapsulation substrate stacked sequentially. The display medium layer emits light to display an image in cooperation with the array substrate and the encapsulation substrate. The encapsulation substrate includes a first surface and a second surface disposed opposite to each other. The first surface is adjacent to the display medium layer, and the second surface is away from the display medium layer. A first metal layer and a second metal layer, which are mutually insulated, are stacked sequentially on the second surface. The first metal layer includes a plurality of first conductive patterns extending along a first direction, and the plurality of first conductive patterns are spaced apart by a predetermined distance along a second direction, the first direction being perpendicular to the second direction. The second metal layer includes a plurality of second conductive patterns extending along the second direction, and the plurality of second conductive patterns are spaced apart by a predetermined distance along the first direction. The first conductive patterns and the second conductive patterns partially overlap to form a sensing capacitor, and output a first sensing signal when a touch operation is sensed.

[0005] The first and second metal layers have conductive patterns only in certain areas. The first and second conductive patterns serve as electrodes for touch control, and the area covering the display substrate is relatively small. As a result, the overlapping area of ​​the two conductive patterns projected onto the array substrate with the display electrodes is relatively small. Consequently, the capacitive load and impedance generated by each first and second conductive pattern and the display electrodes are relatively small, effectively reducing the capacitive load of the touch sensing layer.

[0006] In one implementation, the first conductive pattern includes a plurality of first sub-metal wires, which form a plurality of metal grids.

[0007] The metal mesh can be rhomboid, rectangular, or square.

[0008] In one implementation, the first conductive pattern includes a plurality of first sub-metal wires, which are arranged in parallel to each other.

[0009] In one implementation of this application, the first sub-metal wire is a triangular wave-shaped metal wire extending along the first direction.

[0010] In one implementation of this application, the first sub-metal wire is two parallel triangular wave-shaped metal wires extending along the first direction.

[0011] In one implementation of this application, the first sub-metal wire is a square-wave shaped metal wire extending along the first direction.

[0012] In one implementation, the second conductive pattern includes a plurality of second sub-metal wires, which form a plurality of metal grids. The metal grids are in the shape of a rhombus, rectangle, or square, etc.

[0013] In one implementation, the second conductive pattern includes a plurality of second sub-metallic wires arranged in parallel to each other.

[0014] In one implementation of this application, the second sub-metal wire is a triangular wave-shaped metal wire extending along the first direction.

[0015] In one implementation of this application, the second sub-metal wire is two parallel triangular wave-shaped metal wires extending along the first direction.

[0016] In one implementation of this application, the second sub-metal wire is a square-wave shaped metal wire extending along the first direction, and the first sub-metal wire is a straight-line shaped metal wire extending along the second direction. Two adjacent first sub-metal wires intersect with two adjacent second sub-metal wires to form a square metal grid, and the shape and size of the metal grid are substantially the same as the shape and size of the pixel unit.

[0017] In one implementation, in the region where the first conductive pattern and the second conductive pattern overlap, at the location where the first sub-metal wire overlaps with the second sub-metal wire, the first sub-metal wire has at least one opening.

[0018] The opening provided at the overlapping position of the first sub-metal wire and the second sub-metal wire can effectively reduce the inductive capacitance of the first sub-metal wire and the second sub-metal wire in the vertical stacking direction, thereby further reducing the driving load of the touch control module.

[0019] In one implementation, the first metal layer further includes a plurality of empty metal grids, the empty metal grids being spaced apart between adjacent first conductive patterns, and the empty metal grids being insulated from each other; or the second metal layer further includes a plurality of empty metal grids, the empty metal grids being spaced apart between adjacent second conductive patterns, and the empty metal grids being insulated from each other.

[0020] In one implementation, the metal mesh has a first size, and at the opening, the first sub-metal wire and the second sub-metal wire are spaced apart by a second size. The second size is smaller than the first size.

[0021] In one implementation, the array substrate includes a plurality of pixel regions arranged in a matrix. The display medium layer forms a pixel unit for each pixel region. Adjacent pixel units include a light-shielding area. The pixel unit emits light to display an image. Each metal mesh is directly opposite a pixel unit and coincides with the light-shielding area, and the shape of the metal mesh is the same as the shape of the pixel unit. By having a metal mesh directly opposite and surrounding a pixel unit, the overlapping of areas where metal wires block emitted light within the pixel region can be prevented from affecting the light brightness, thereby effectively ensuring the brightness of the displayed image.

[0022] Secondly, in one implementation of this application, the touch display device includes the aforementioned touch display panel and the touch control module. The touch control module is used to identify the position of the touch operation received by the touch display panel based on the received sensing signal. The touch control module is located in an area outside the area where the conductive pattern is set on the touch display panel, or is located in an area outside the touch display panel. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the planar structure of the touch display panel in the first embodiment of this application;

[0024] Figure 2 For example Figure 1 A schematic diagram of the cross-sectional structure of the touch display panel along line II-II;

[0025] Figure 3 For example Figure 1A schematic diagram of the planar structure of the pixel region of the array substrate is shown.

[0026] Figure 4 For example Figure 2 The diagram shows a planar structure of the touch sensing layer disposed on the packaging substrate;

[0027] Figure 5 For example Figure 4 An enlarged structural schematic diagram of the overlapping area of ​​the first and second conductive patterns shown;

[0028] Figure 6 For example Figure 5 The diagram shows the exploded structure of the first and second conductive patterns.

[0029] Figure 7 For example Figure 5 A schematic diagram of the cross-sectional structure along BB in the conductive pattern shown.

[0030] Figure 8 As in the second embodiment of this application Figure 4 An enlarged structural schematic diagram of the overlapping area of ​​the first and second conductive patterns shown;

[0031] Figure 9 for Figure 8 The diagram shows the exploded structure of the first and second sub-metal wires.

[0032] Figure 10 As in the third embodiment of this application Figure 4 An enlarged structural schematic diagram of the overlapping area of ​​the first and second conductive patterns shown;

[0033] Figure 11 for Figure 10 The diagram shows the exploded structure of the first and second sub-metal wires.

[0034] Figure 12 As shown in the fourth embodiment of this application Figure 4 An enlarged structural schematic diagram of the overlapping area of ​​the first and second conductive patterns shown;

[0035] Figure 13 for Figure 12 The diagram shows the exploded structure of the first and second sub-metal wires.

[0036] Figure 14 As in the fifth embodiment of this application Figure 4 An enlarged structural schematic diagram of the overlapping area of ​​the first and second conductive patterns shown;

[0037] Figure 15 for Figure 12The diagram shows the exploded structure of the first and second sub-metal wires.

[0038] Figure 16 As in the sixth embodiment of this application Figure 4 An enlarged structural schematic diagram of the overlapping area of ​​the first and second conductive patterns shown;

[0039] Figure 17 For example Figure 16 The cross-sectional view of the touch display panel at the second position is shown.

[0040] Figure 18 For example Figure 16 The cross-sectional view of the touch display panel shown is at the third position;

[0041] Figure 19 As shown in the seventh embodiment of this application Figure 4 An enlarged structural schematic diagram of the overlapping area of ​​the first and second conductive patterns shown;

[0042] Figure 20 for Figure 19 The diagram shows the exploded structure of the first and second sub-metal wires.

[0043] Figure 21 As in the eighth embodiment of this application Figure 16 A schematic diagram of the structure of the first conductive pattern shown;

[0044] Figure 22 This is a schematic diagram showing the positions of the first conductive pattern and the second conductive pattern and the distribution of the output first sensing signal. Detailed Implementation

[0045] The present application will now be described with reference to specific embodiments.

[0046] Please see Figure 1 This is a schematic diagram of the planar structure of the touch display panel 10 in the first embodiment of this application.

[0047] The touch display panel 10 includes an active area AA and a non-active area NA. The active area AA corresponds to the screen display area of ​​the touch display panel 10 and is used for image display. The non-active area NA is used to set up functional modules such as the display driver control module and the touch driver control module. The touch display panel 10 can be used in touch display devices, such as mobile phones, tablets, and other electronic devices capable of performing display and touch functions.

[0048] Please see Figure 2 , its is like Figure 1 The diagram shows a cross-sectional view of the touch display panel 10 along line II-II.

[0049] like Figure 2 As shown, the touch display panel 10 is used to realize image display and touch operation detection. In this embodiment, the touch display panel 10 includes an array substrate 11, a display medium layer 13 and an encapsulation substrate 15 stacked sequentially from bottom to top along the figure. The display medium layer 13 is sandwiched between the array substrate 11 and the encapsulation substrate 15. The array substrate 11, the display medium layer 13 and the encapsulation substrate 15 constitute a display substrate.

[0050] In this embodiment, the display medium layer 13 is an organic light-emitting diode (OLED). A matrix of pixel regions is arranged on the array substrate 11. Each pixel region has a driving circuit and a driving electrode for driving the display medium layer 13 to emit light. The encapsulation substrate 15 encapsulates the display medium layer 13. The driving circuit and driving electrode work together to drive the material of the display medium layer to emit light, thereby performing image display. In this embodiment, the encapsulation substrate 15 is silicon nitride (SINx) or an organic coating material.

[0051] In this embodiment, the encapsulation substrate 15 includes two opposing first surfaces 151 and second surfaces 152. The first surface is adjacent to the display medium layer 13, and the second surface 152 is away from the display medium layer 13. A touch sensing layer 17 and a protective layer 19 are sequentially disposed on the second surface 152. The touch sensing layer 17 is used to identify the touch position applied to the touch display panel 10, and the protective layer 19 is used to protect the touch sensing layer 17 and the encapsulation substrate 15, etc. The touch sensing layer 17 is disposed on the surface of the encapsulation substrate 15 in a Touch On Encapsulation (TOE) manner.

[0052] In this embodiment, when the display medium layer 13 is an organic light-emitting display material, the display panel is an active-matrix organic light-emitting diode (AMOLED) display panel. The touch display panel 10 can be made into a flexible, bendable panel structure, thereby enabling its application in flexible touch display devices, such as foldable mobile phones or tablets.

[0053] Please see Figure 3 , its is like Figure 1 A schematic diagram of the planar structure of the 11-pixel region of the array substrate shown.

[0054] like Figure 3As shown, corresponding to the display area AA, the surface of the array substrate 11 adjacent to the display medium layer 13 is provided with a plurality of pixel regions (not shown) arranged in a matrix along the first direction X and the second direction Y. Each pixel region is provided with a driving circuit, and the driving circuit includes thin film transistors and capacitors that can be formed on the surface of the array substrate by means of semiconductor material deposition and etching.

[0055] In this embodiment, the shape of the pixel area can be set according to actual needs, such as square, rhombus, pentagon, hexagon, etc. Of course, the aforementioned shape of the pixel area is only an example and is not limited thereto.

[0056] Each pixel region's driving circuit can drive the light emitted from the light-emitting material contained in the display medium layer 13 corresponding to that pixel region. In this embodiment, the driving circuit in the pixel region and the corresponding display medium layer 13 cooperate to form a pixel unit.

[0057] The light-emitting materials contained in the display medium layer 13 corresponding to adjacent pixel units can be different to emit light of different colors. Preferably, there is a light-shielding area (BM) between adjacent pixel units to prevent the light emitted from adjacent pixel units from interfering with each other.

[0058] Corresponding to the non-display area NA, a display driving circuit and a touch control module TC are provided to drive the driving circuits in each pixel area. Figure 4 The display driving circuit includes a data driving circuit for providing image data signals, a scan driving circuit for performing line scanning, and a timing controller (Tcon) for controlling the operating sequence of the data driving circuit and the scan driving circuit.

[0059] Please see Figure 4 , its is like Figure 2 The diagram shows a planar structure of the touch sensing layer 17 disposed on the packaging substrate 15.

[0060] like Figure 4 As shown, the touch sensing layer 17 includes multiple first conductive patterns P1 extending along a first direction X and arranged side-by-side at a predetermined distance in a second direction Y, and multiple second conductive patterns P2 extending along the second direction Y and arranged side-by-side at a predetermined distance in the first direction X. The multiple first conductive patterns P1 and the multiple second conductive patterns P2 are located in different layer structures and are insulated from each other, and are all electrically connected to the touch control module TC via signal transmission lines L.

[0061] In this embodiment, the first conductive pattern P1 and the second conductive pattern P2 partially overlap in the extending direction to form a mutual capacitance sensing module, which is used to sense the first sensing signal generated by the user's touch, and transmits it to the touch control module TC through the signal transmission line L. The touch control module TC identifies the position of the touch operation based on the first sensing signal.

[0062] In this embodiment, multiple first conductive patterns P1 can serve as touch driving electrodes TX, and multiple second conductive patterns P2 can serve as touch sensing electrodes RX. That is, the multiple first conductive patterns P1 are used to receive touch driving signals provided by the touch control module TC. The multiple first conductive patterns P1 generate a sensing capacitance with the multiple second conductive patterns P2 through the touch driving signals, and the multiple second conductive patterns P2 can correspondingly output electrical signals as touch sensing signals. When the capacitance between the first conductive patterns P1 and the second conductive patterns P2 changes due to the user's touch operation, the touch sensing signal output by the second conductive pattern P2 also changes accordingly. By analyzing the specific location where the sensing signal changes, the specific location of the touch operation can be identified.

[0063] The first conductive pattern P1 and / or the second conductive pattern P2 are grid shapes composed of metal wires. In this embodiment, the first conductive pattern P1 and the second conductive pattern P2 are uniform strips and each includes multiple regular metal grids. The shape of the metal grids can be square, rectangular, rhomboid, or other types of polygons.

[0064] For more specific details, please refer to Figures 5-6 , Figure 5 For example Figure 4 An enlarged schematic diagram of the overlapping area A1 of the first conductive pattern P1 and the second conductive pattern P2 shown. Figure 6 For example Figure 5 The diagram shows the exploded structure of the first conductive pattern P1 and the second conductive pattern P2.

[0065] like Figures 5-6 As shown, the first conductive pattern P1 includes multiple consecutively arranged square metal grids Me1, and the second conductive pattern P2 also includes multiple consecutively arranged square metal grids.

[0066] In this embodiment, the metal mesh Me1 in the first conductive pattern P1 and the second conductive pattern P2 is square, and the side length of the square metal mesh is the first dimension D1.

[0067] Within the overlapping region A1, there are first sub-metal wires C11 extending in the first direction X and second sub-metal wires C12 extending in the second direction Y, wherein multiple second sub-metal wires C11 and multiple second sub-metal wires C12 overlap each other in their extending directions.

[0068] In this embodiment, the first sub-metal wire C11 is a square metal mesh, and the second sub-metal wire C12 is a square metal mesh. The metal meshes are both positioned directly opposite the light-shielding area BM, and each metal mesh surrounds a pixel unit. That is, the projection of the metal mesh onto the array substrate includes a pixel unit, effectively preventing the metal wires from overlapping with the pixel area and affecting the display brightness of the pixel unit.

[0069] Please see Figure 7 , its is like Figure 5 A schematic diagram of the cross-sectional structure along the BB line in the conductive pattern shown, as follows: Figure 7 As shown, in this embodiment, the array substrate 11 includes a display electrode 111, which is used to receive external display signals and drive the display medium layer 13 to display images accordingly. The display electrode 111 includes a cathode and an anode.

[0070] The touch sensing layer 17 includes a first metal layer 171, a first insulating layer 172, and a second metal layer 173 stacked sequentially. The first metal layer 171 includes, for example: Figure 4 The first conductive pattern P1, which extends along the first direction X, is shown. The second metal layer 173 includes, as shown... Figure 4 The diagram shows multiple second conductive patterns P2 extending along the second direction Y.

[0071] like Figure 7 As shown, the first sub-metal wire C11 in the first conductive pattern P1 and the second sub-metal wire C12 in the second conductive pattern P2 are arranged opposite each other, that is, the projection of the second sub-metal wire C12 on the first metal layer 171 at least partially overlaps with the first sub-metal wire C11.

[0072] Please see Figures 8-9 , Figure 8 As in the second embodiment of this application Figure 4 An enlarged structural diagram of the overlapping area A of the first conductive pattern and the second conductive pattern shown. Figure 9 for Figure 8 The diagram shows the exploded structure of the first sub-metal wire C11 and the second sub-metal wire C12.

[0073] like Figures 8-9As shown, the first sub-metal wire C11 is a diamond-shaped metal mesh extending along the first direction X, and the second sub-metal wire C12 is a diamond-shaped metal mesh extending along the second direction Y. The shape and size of each metal mesh are substantially the same as the shape and size of the pixel unit. In this embodiment, the metal meshes are positioned directly opposite and around the pixel unit, effectively preventing the metal wires from overlapping with the pixel area and affecting the display brightness of the pixel unit.

[0074] Please see Figures 10-11 , Figure 10 As in the third embodiment of this application Figure 4 An enlarged structural diagram of the overlapping area A1 of the first conductive pattern and the second conductive pattern shown. Figure 11 for Figure 10 The diagram shows the exploded structure of the first sub-metal wire C11 and the second sub-metal wire C12.

[0075] like Figures 10-11 As shown, the first sub-metal wire C11 is a triangular wave-shaped metal wire extending along the first direction X, and the second sub-metal wire C12 is a triangular wave-shaped metal wire extending along the second direction Y.

[0076] Please see Figures 12-13 , Figure 12 As shown in the fourth embodiment of this application Figure 4 An enlarged structural diagram of the overlapping area A1 of the first conductive pattern and the second conductive pattern shown. Figure 13 for Figure 12 The diagram shows the exploded structure of the first sub-metal wire C11 and the second sub-metal wire C12.

[0077] like Figures 12-13 As shown, the first sub-metal wire C11 is two parallel triangular wave-shaped metal wires extending along the first direction X, and the second sub-metal wire C12 is two parallel triangular wave-shaped metal wires extending along the second direction Y.

[0078] Please see Figures 14-15 , Figure 14 As in the fifth embodiment of this application Figure 4 An enlarged structural diagram of the overlapping area A1 of the first conductive pattern and the second conductive pattern shown. Figure 15 for Figure 12 The diagram shows the exploded structure of the first sub-metal wire C11 and the second sub-metal wire C12.

[0079] like Figures 14-15As shown, the first sub-metal wire C11 is a triangular wave-shaped metal wire extending along the first direction X, and the second sub-metal wire C12 is a diamond-shaped metal mesh metal wire extending along the second direction Y. The shape and size of each metal mesh are substantially the same as the shape and size of the pixel unit. In this embodiment, the metal meshes are positioned directly opposite and around the pixel unit, effectively preventing the metal wires from overlapping with the pixel area and affecting the display brightness of the pixel unit.

[0080] Please see Figure 16 ,in Figure 16 As in the sixth embodiment of this application Figure 4 An enlarged structural schematic diagram of the overlapping area A1 of the first conductive pattern and the second conductive pattern shown.

[0081] like Figure 16 As shown, the first sub-metal wire C11 is a triangular wave-shaped metal wire extending along the first direction X, and the second sub-metal wire C12 is a diamond-shaped metal mesh metal wire extending along the second direction Y. The shape and size of each metal mesh are substantially the same as the shape and size of the pixel unit. In this embodiment, the metal meshes are positioned directly opposite and around the pixel unit, effectively preventing the metal wires from overlapping with the pixel area and affecting the display brightness of the pixel unit.

[0082] like Figure 16 As shown, at the first position A11 in the overlapping area A, the first sub-metal wire C11 in the first conductive pattern P1 and the second sub-metal wire C12 in the second conductive pattern P2 are directly opposite each other, that is, please refer to [reference needed]. Figure 6 The projection of the second sub-metal wire C12 onto the first metal layer 171 at least partially overlaps with the first sub-metal wire C11.

[0083] Please see Figure 17 , Figure 17 For example Figure 16 The diagram shows a cross-sectional view of the touch display panel at the second location A12.

[0084] like Figure 17 As shown, at the second position A12 in the overlapping area A1 of the first conductive pattern P1 and the second conductive pattern P2, the first sub-metal wire C11 in the first conductive pattern P1 and the second sub-metal wire C12 in the second conductive pattern P2 are arranged opposite each other, and the first sub-metal wire C11 has a first opening H1. The second sub-metal wire C12 is opposite to the first opening H1, and the first sub-metal wire C11 and the second sub-metal wire C12 are spaced apart by a second dimension D2, wherein the second dimension D2 is smaller than the first dimension D1.

[0085] Please see Figure 18 , Figure 18 For example Figure 16 The diagram shows a cross-sectional view of the touch display panel at position A13. (See diagram below.) Figure 17 As shown, at the third position A13 in the overlapping region A1, the first sub-metal wire C11 in the first conductive pattern P1 and the second sub-metal wire C12 in the second conductive pattern P2 are positioned opposite each other, and the first sub-metal wire C11 has a second opening H2. At the second opening H2, the first sub-metal wire C11 and the second sub-metal wire C12 are spaced by a second dimension D2, where the second dimension D2 is smaller than the first dimension D1. In the overlapping region A1, to ensure the conductivity of the first sub-metal wire C11 along the first direction, except for necessary continuous portions, for example, at the first position A11, when the first sub-metal wire C11 and the second sub-metal wire C12 overlap, the first sub-metal wire C11 is continuous. However, at the second position A12 and the third position A13, where the first sub-metal wire C11 and the second sub-metal wire C12 overlap, openings are provided to reduce the inductive capacitance of the first sub-metal wire C11 and the second sub-metal wire C12 in the vertical stacking direction, thereby reducing the driving load of the touch control module TC.

[0086] Please see Figures 19-20 , Figure 19 As shown in the seventh embodiment of this application Figure 4 An enlarged structural diagram of the overlapping area A1 of the first conductive pattern and the second conductive pattern shown. Figure 20 for Figure 19 The exploded structural diagram of the first sub-metal wire C11 and the second sub-metal wire C12 in the conductive pattern shown.

[0087] like Figures 19-20 As shown, the first sub-metal wire C11 is a square-wave shaped metal wire extending along the first direction X, and the second sub-metal wire C12 is a straight-line shaped metal wire extending along the second direction Y. Two adjacent first sub-metal wires C11 and two adjacent second sub-metal wires C12 intersect to form a square metal grid, and the shape and size of the metal grid are substantially the same as the shape and size of the pixel unit. In this embodiment, preferably, the metal grid is directly opposite the light-shielding area BM. Figure 3 It is set around the pixel unit to effectively prevent the metal wires from affecting the display brightness of the pixel unit when they overlap with the pixel area.

[0088] Please see Figure 21 As shown in the eighth embodiment of this application Figure 16 A schematic diagram of the structure of the first conductive pattern shown.

[0089] like Figure 21 As shown, combined with Figure 7 The first metal layer 171 includes a first conductive pattern P1 composed of a dummy metal mesh Mu and a first sub-metal wire C11. The first sub-metal wire C11 is not connected to the dummy metal mesh Mu, meaning they are insulated from each other. In this embodiment, the first sub-metal wire C11 and the dummy metal mesh Mu are spaced at a predetermined distance, and the dummy metal mesh Mu is suspended in a vacant state.

[0090] In this embodiment, the shape of the empty metal mesh Mu is the same as the shape of the pixel unit Pixel, which can be a rhombus, rectangle, square, or other shapes. It is positioned directly opposite the light-shielding area BM and surrounds a pixel unit Pixel to improve the display brightness of the pixel unit Pixel.

[0091] It can be understood that the first conductive pattern P1 formed by the first sub-metal wire C11 in the first metal layer 171 can be obtained by cutting and separating from the vacant metal grid Mu.

[0092] Optionally, the second metal layer 173 may also include a second conductive pattern P2 consisting of a dummy metal mesh and a second sub-metal wire C12. The second sub-metal wire C12 is not connected to the dummy metal mesh; that is, the second sub-metal wire C12 and the dummy metal mesh Mu are insulated from each other. In this embodiment, the second sub-metal wire C12 and the dummy metal mesh are spaced at a predetermined distance, and the dummy metal mesh is in a suspended, unused state.

[0093] Preferably, to reduce the complexity of conductive pattern fabrication, either the first metal layer 171 or the second metal layer 173 may include an empty metal mesh.

[0094] Compared to existing technologies, such as Figure 4 , Figures 8-21 As shown, conductive patterns are only partially provided in the first metal layer 171 and the second metal layer 173. The first sub-metal wire C11 and the second sub-metal wire C12 in the conductive pattern serve as the touch driving electrode TX and the touch sensing electrode RX, respectively. The area covered by them on the display substrate is relatively small. As shown in Table 1, the projected area of ​​the first sub-metal wire C11 and the second sub-metal wire C12 on the display electrode 111 is relatively small. That is, the area of ​​the first sub-metal wire C11 and the second sub-metal wire C12 overlapping the display electrode 111 is small. Therefore, the capacitive load and impedance generated by each first conductive pattern P1 and each second conductive pattern P2 with the display electrode 111 are relatively small, effectively reducing the load on the touch sensing layer 17.

[0095]

[0096] Table 1

[0097] Furthermore, since the first conductive pattern P1 and the second conductive pattern P2 are strip-shaped, that is, the shape of the metal mesh in each region of the first conductive pattern P1 and the second conductive pattern P2, especially at the edges, is relatively regular, thus, as Figure 22 As shown, where, Figure 22 This is a schematic diagram showing the positions of the first conductive pattern P1 and the second conductive pattern P2 and the distribution of the output first sensing signal. The capacitance values ​​formed by the first conductive pattern P1 and the second conductive pattern P2 at various positions are relatively uniform. Therefore, when a touch operation is received, the value of the sensing signal output by the second conductive pattern P2 is basically the same. That is, in the area corresponding to the touch operation in the touch sensing layer 17, the value of the sensing signal output by the second conductive pattern P2 is relatively uniform, which makes the dispersion of the sensing signal smaller and the linearity higher. This makes the subsequent processing of the corresponding sensing signal simpler and ensures more accurate position recognition of the touch operation.

[0098] The above description is a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principles of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

Claims

1. A touch display panel, comprising an array substrate, a display medium layer, and an encapsulation substrate stacked sequentially, wherein the display medium layer emits light in cooperation with the array substrate and the encapsulation substrate, and the light passes through the encapsulation substrate to display an image; in, The encapsulation substrate includes a first surface and a second surface disposed opposite to each other, the first surface being disposed adjacent to the display dielectric layer, and the second surface being disposed away from the display dielectric layer. The second surface is provided with a first metal layer and a second metal layer that are insulated from each other in sequence; The first metal layer includes a plurality of first conductive patterns extending along a first direction, the plurality of first conductive patterns being arranged at a predetermined distance along a second direction, the first direction being perpendicular to the second direction; The second metal layer includes a plurality of second conductive patterns extending along the second direction, the plurality of second conductive patterns being arranged at a predetermined distance along the first direction, wherein the first conductive pattern or the second conductive pattern includes a plurality of metal meshes; The first conductive pattern and the second conductive pattern partially overlap to form a sensing capacitor, and output a first sensing signal when a touch operation is sensed. The display medium layer includes a plurality of pixel units, and a light-shielding area is included between adjacent pixel units. The pixel units are used to emit light. Each metal mesh is directly opposite a pixel unit and coincides with the light-shielding area. The metal mesh is arranged around the pixel unit. At the same time, the projection of each metal mesh on the array substrate includes a pixel unit. The shape of the metal mesh is the same as the shape of the pixel unit. The first metal layer or the second metal layer further includes a plurality of empty metal grids, which are spaced apart between adjacent first conductive patterns or second conductive patterns. The empty metal grids are insulated from the first conductive pattern or the second conductive pattern and are in a suspended state.

2. The touch display panel according to claim 1, characterized in that, The first conductive pattern includes a plurality of first sub-metal wires, which constitute a plurality of the metal grids.

3. The touch display panel according to claim 1, characterized in that, The first conductivity diagram includes a plurality of first sub-metal wires, which are arranged in parallel to each other.

4. The touch display panel according to claim 1, characterized in that, The second conductive pattern includes a plurality of second sub-metal wires, which constitute a plurality of the metal grids.

5. The touch display panel according to claim 1, characterized in that, The second conductivity diagram includes a plurality of second sub-metal wires, which are arranged in parallel to each other.

6. The touch display panel according to any one of claims 1-5, characterized in that, The first conductive pattern includes a plurality of first sub-metal wires, and the second conductive pattern includes a plurality of second sub-metal wires. In the region where the first conductive pattern and the second conductive pattern overlap, and at the location where the first sub-metal wires and the second sub-metal wires overlap, the first sub-metal wire has at least one opening.

7. The touch display panel according to claim 6, characterized in that, The metal mesh has a first size; At the opening, the first sub-metal wire and the second sub-metal wire are spaced apart by a second dimension; The second dimension is smaller than the first dimension.

8. The touch display panel according to claim 7, characterized in that, The array substrate includes a plurality of pixel regions arranged in a matrix, and the display medium layer constitutes a pixel unit for each of the pixel regions.

9. A touch display device, characterized in that, Includes a touch display panel and a touch control module as described in any one of claims 1-8, wherein the touch control module is used to identify the position of the touch operation received by the touch display panel based on the received sensing signal.

Images