CN110502152B - Touch panel, touch display panel and touch display device - Google Patents
Touch panel, touch display panel and touch display device Download PDFInfo
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- CN110502152B CN110502152B CN201910809339.9A CN201910809339A CN110502152B CN 110502152 B CN110502152 B CN 110502152B CN 201910809339 A CN201910809339 A CN 201910809339A CN 110502152 B CN110502152 B CN 110502152B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
Abstract
The invention discloses a touch panel, a touch display panel and a touch display device. The touch panel includes: the induction layer comprises a first induction part and a second induction part, the first induction part is arranged in the special-shaped area of the substrate, and the second induction part is arranged in the non-special-shaped area of the substrate; the first induction part comprises a plurality of first touch electrode blocks which are distributed along a first direction and are arranged in an insulated mode, and a plurality of second touch electrode blocks which are distributed along a second direction and are arranged in an insulated mode, the first direction and the second direction are mutually crossed, and the second induction part comprises a first conducting layer and a second conducting layer; the insulating layer covers the first touch electrode blocks and the second touch electrode blocks on the first induction part, the second induction part is positioned between the first conducting layer and the second conducting layer, and the first touch electrode blocks, the second touch electrode blocks and the first conducting layer are positioned on the same layer. According to the touch panel provided by the embodiment of the invention, the touch accuracy of the touch panel can be improved.
Description
Technical Field
The invention relates to the field of touch sensing, in particular to a touch panel, a touch display panel and a touch display device.
Background
With the continuous development of touch screens, touch panels are increasingly widely used in the field of terminal devices. The touch panel can be classified into a resistive type, a capacitive type, an optical type, a sonic type, and the like according to different sensing technologies, wherein the capacitive type touch panel further includes a self-capacitive type and a mutual capacitive type.
In the irregular touch panel, the surface areas of the touch electrodes at the irregular edge positions in the irregular area and the touch electrodes in the non-irregular area are different, so that the touch signal generated on the touch panel is uneven, and the touch accuracy of the touch panel is influenced.
Disclosure of Invention
The invention provides a touch panel, a touch display panel and a touch display device, which can improve the touch accuracy of the touch panel.
In a first aspect, an embodiment of the present invention provides a touch panel, which includes:
the substrate comprises a special-shaped area and a non-special-shaped area adjacent to the special-shaped area;
the induction layer comprises a first induction part and a second induction part, the first induction part is arranged in the special-shaped area of the substrate, and the second induction part is arranged in the non-special-shaped area of the substrate;
the first induction part comprises a plurality of first touch electrode blocks which are distributed along a first direction and are arranged in an insulated mode, and a plurality of second touch electrode blocks which are distributed along a second direction and are arranged in an insulated mode, wherein the first direction and the second direction are mutually crossed, and the second induction part comprises a first conducting layer and a second conducting layer;
the insulating layer covers the first sensing parts and the second sensing parts, the second sensing parts are located between the first conductive layer and the second conductive layer, and the first touch electrode blocks, the second touch electrode blocks and the first conductive layer are located on the same layer.
According to an aspect of the embodiments of the present invention, the second sensing portion includes a plurality of third touch electrodes and a plurality of fourth touch electrodes, each of the third touch electrodes includes a plurality of third touch electrode blocks and a plurality of bridging blocks, adjacent third touch electrode blocks are connected in series through the bridging blocks, and each of the fourth touch electrodes includes a plurality of fourth touch electrode blocks connected in series;
the plurality of bridging blocks are located in the same layer to form the first conductive layer, the plurality of third touch electrode blocks and the plurality of fourth touch electrodes are located in the same layer to form the second conductive layer, and the first conductive layer and the second conductive layer are stacked in the thickness direction of the touch panel.
According to an aspect of the embodiments of the present invention, at least a portion of at least one of the first touch electrode block, the second touch electrode block, the third touch electrode block, and the fourth touch electrode block is a metal mesh structure, and the metal mesh structure is formed by a plurality of metal wires.
According to an aspect of the embodiment of the present invention, the third touch electrode extends along the first direction, and the fourth touch electrode extends along the second direction; alternatively, the first and second liquid crystal display panels may be,
the third touch electrode extends along a third direction, the fourth touch electrode extends along a fourth direction, and the first direction, the second direction, the third direction and the fourth direction are different.
According to an aspect of the embodiment of the present invention, the second sensing part includes a plurality of third touch electrodes and a plurality of fourth touch electrodes;
the plurality of third touch electrodes are located on the same layer to form the first conductive layer, and the plurality of fourth touch electrodes are located on the same layer to form the second conductive layer.
According to an aspect of the embodiments of the present invention, the touch panel further includes:
each first lead is connected with one first touch electrode block;
each second lead is connected with one second touch electrode block;
at least part of the first lead is directly connected with the first touch electrode block or is connected with the first touch electrode block through a via hole on the insulating layer;
and/or at least part of the second lead is directly connected with the second touch electrode block or is connected with the second touch electrode block through a via hole on the insulating layer.
According to an aspect of the embodiment of the present invention, the insulating layer is a continuous structure, and a material of the insulating layer is any one of silicon nitride, silicon oxide, aluminum oxide, and hafnium oxide.
In a second aspect, an embodiment of the present invention provides a touch display panel, which includes a display device and the touch panel of any one of the first aspect.
According to an aspect of the embodiments of the present invention, the display device includes a plurality of sub-pixels and an isolation region between adjacent sub-pixels, and a plurality of metal lines of a metal mesh structure of the touch panel are vertically projected in the isolation region on the touch display panel.
In a third aspect, an embodiment of the present invention provides a touch display device, including the touch display panel according to any one of the second aspects.
According to the touch panel provided by the embodiment of the invention, the touch panel comprises a substrate, a sensing layer and an insulating layer. The induction layer comprises a first induction part and a second induction part, the first induction part is arranged in the special-shaped area of the substrate, the second induction part is arranged in the non-special-shaped area of the substrate, the first induction part comprises a plurality of first touch electrode blocks which are distributed along a first direction and are arranged in an insulating mode, the second touch electrode blocks which are distributed along a second direction and are arranged in an insulating mode, and the second induction part comprises a first conducting layer and a second conducting layer. The insulating layer covers the plurality of first touch electrode blocks and the plurality of second touch electrode blocks at the first induction part, the insulating layer is positioned between the first conducting layer and the second conducting layer at the second induction part, and the first touch electrode blocks, the second touch electrode blocks and the first conducting layer are positioned on the same layer. In the special-shaped area, the insulating layer is located on one side, back to the substrate, of the first touch electrode block and the second touch electrode block, which is equivalent to increase the dielectric constant of a capacitor in the special-shaped area, so that the capacitance value is increased, the touch sensitivity of the special-shaped area is improved, the touch panel generates uniform touch signal quantity on the special-shaped area and the non-special-shaped area, and the touch accuracy of the touch panel is improved.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings in which like or similar reference characters refer to like or similar parts and which are not necessarily drawn to scale.
Fig. 1 is a schematic structural diagram of a touch panel according to an embodiment of the invention;
FIG. 2 shows a schematic cross-sectional view in the direction BB in FIG. 1, according to an embodiment of the present invention;
FIG. 3 shows a schematic cross-sectional view along AA in FIG. 1, in accordance with one embodiment of the present invention;
FIG. 4 shows a schematic view of a metal grid structure according to an embodiment of the invention;
FIG. 5 is a schematic diagram of a touch display panel according to an embodiment of the invention;
fig. 6 is a schematic diagram illustrating a position relationship between a metal mesh structure and a sub-pixel according to an embodiment of the invention.
Description of reference numerals:
100-a touch panel;
10-a substrate; 10 a-non-shaped areas; 10 b-a shaped area;
20-a first sensing portion; 21-a first touch electrode block; 22-a second touch electrode block;
30-a second sensing portion; 310-a first conductive layer; 320-a second conductive layer; 31-a third touch electrode; 311-a third touch electrode block; 32-a fourth touch electrode; 321-a fourth touch electrode block; 301-a bridging block; 302-connecting lines;
40-an insulating layer; 401-via holes;
51-a first lead; 52-second lead; 53-third lead; 54-a fourth lead;
60-a binding region;
70-a metal grid structure; 71-a metal line;
200-a display component; 210-a sub-pixel; 220-isolation regions.
Detailed Description
Features of various aspects and exemplary embodiments of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising 8230; \8230;" comprises 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.
Fig. 1 is a schematic structural diagram of a touch panel according to an embodiment of the present invention. The touch panel 100 may include a substrate 10 and a sensing layer on the substrate 10. The sensing layer comprises a first sensing part 20 and a second sensing part 30, the substrate 10 comprises a non-irregular area 10a and an irregular area 10b adjacent to the non-irregular area 10a, the first sensing part 20 is located in the irregular area 10b, and the second sensing part 30 is located in the non-irregular area 10a. The shaped area 10b may be an area having a shaped edge, such as an arc-shaped edge. The non-special-shaped area 10a and the special-shaped area 10b can be set according to actual requirements, for example, the area where the camera is located is set as the special-shaped area 10b, and the area outside the camera is set as the non-special-shaped area 10a. It should be noted that, in order to clearly show the first sensing portion 20 and the second sensing portion 30, other layer structures on the sensing layer are hidden and shown in fig. 1.
The substrate 10 may be a transparent insulating substrate such as glass, silicon nitride, etc., or in some embodiments, may be an opaque substrate. In some embodiments, a complete display panel or a semi-finished product of a display panel may be used as the substrate 10 according to embodiments of the present invention.
Referring to fig. 1 and 2, the first sensing portion 20 includes a plurality of first touch electrode blocks 21 and a plurality of second touch electrode blocks 22. The plurality of first touch electrode blocks 21 are distributed along a first direction X and are insulated from each other, and the plurality of second touch electrode blocks 22 are distributed along a second direction Y and are insulated from each other, where the second direction Y intersects with the first direction X. The insulating layer 40 covers the first touch electrode blocks 21 and the second touch electrode blocks 22 on the first sensing portion 20. That is, in the irregular area 10b, the insulating layer 40 is located on a side of the first touch electrode blocks 21 and the second touch electrode blocks 22 facing away from the substrate 10.
The second sensing part 30 includes a first conductive layer 310 and a second conductive layer 320. The first conductive layer 310 and the second conductive layer 320 form a plurality of third touch electrodes 31 and a plurality of fourth touch electrodes 32 in the non-irregular area 10a of the touch panel. The insulating layer 40 is located between the first conductive layer 310 and the second conductive layer 320 at the second sensing portion 30.
According to the touch panel 100 provided by the embodiment of the invention, the touch panel 100 includes a substrate 10, a sensing layer and an insulating layer 40. The sensing layer includes a first sensing portion 20 disposed in the irregular area 10b of the substrate 10 and a second sensing portion 30 disposed in the non-irregular area 10a of the substrate 10, the first sensing portion 20 includes a plurality of first touch electrode blocks 21 distributed along a first direction and insulated from each other, and a plurality of second touch electrode blocks 22 distributed along a second direction and insulated from each other, and the second sensing portion 30 includes a first conductive layer 310 and a second conductive layer 320. The insulating layer 40 covers the plurality of first touch electrode blocks 21 and the plurality of second touch electrode blocks 22 in the irregular area 10b of the substrate 10, the insulating layer 40 is located between the first conductive layer 310 and the second conductive layer 320 in the non-irregular area 10a of the substrate 10, and the first touch electrode blocks 21 and the second touch electrode blocks 22 are located on the same layer as the first conductive layer 310. In the special-shaped area 10b, the insulating layer 40 is located on the side of the first touch electrode block 21 and the second touch electrode block 22 opposite to the substrate 10, which is equivalent to increase the dielectric constant of the capacitor in the special-shaped area 10b, so as to increase the capacitance value and improve the touch sensitivity of the special-shaped area 10b, so that the touch panel generates uniform touch signals on the non-special-shaped area 10a and the special-shaped area 10b, and the touch accuracy of the touch panel is improved.
In some embodiments, with continued reference to fig. 1 and fig. 2, the second sensing portion 30 includes a plurality of third touch electrodes 31 and a plurality of fourth touch electrodes 32; the third touch electrodes 31 are located on the same layer to form a first conductive layer, and the fourth touch electrodes 32 are located on the same layer to form a second conductive layer 320. For example, the first conductive layer 310 in fig. 2 is used as the third touch electrode 31, the second conductive layer 320 in fig. 2 is used as the fourth touch electrode 32, and the insulating layer 40 is disposed between the third touch electrode 31 and the fourth touch electrode 32. Illustratively, the third touch electrode 31 includes a plurality of serially connected third touch electrode blocks 311, and the fourth touch electrode 32 includes a plurality of serially connected fourth touch electrode blocks 321. The third touch electrode 31 and the fourth touch electrode 32 are arranged in layers, so that the touch position of the non-special-shaped area 10a is determined.
In the embodiment of the present invention, the third touch electrode 31 and the fourth touch electrode 32 are disposed in layers, the insulating layer 40 is located between the third touch electrode 31 and the fourth touch electrode 32, only one insulating layer is located between the third touch electrode 31 and the fourth touch electrode 32, and in the special-shaped area 10b, the insulating layer 40 is located on a side of the first touch electrode blocks 21 and the second touch electrode blocks 22 facing away from the substrate 10, and two insulating layers are equivalently provided between the first touch electrode blocks 21 and the second touch electrode blocks 22, so that a dielectric constant of a capacitor in the special-shaped area 10b is equivalently increased, a capacitance value is further increased, and a touch sensitivity in the special-shaped area is improved.
In some embodiments, the third touch electrode 31 and the fourth touch electrode 32 are disposed on the same layer. For example, referring to fig. 1 and 3, each third touch electrode 31 includes a plurality of third touch electrode blocks 311, adjacent third touch electrode blocks 311 are connected in series through a bridging block 301, and each fourth touch electrode 32 includes a plurality of fourth touch electrode blocks 321 connected in series. The plurality of bridging blocks 301 are located on the same layer to form a first conductive layer, the plurality of third touch electrode blocks 311 and the plurality of fourth touch electrode blocks 321 are located on the same layer to form the second conductive layer, and the first conductive layer and the second conductive layer are stacked in the thickness direction of the touch panel. That is, the first conductive layer 310 in fig. 2 is used as the bridge block 301, and the second conductive layer 320 in fig. 2 is used as the third touch electrode block 311 and the fourth touch electrode block 321.
In some embodiments, please refer to fig. 3, in which fig. 3 is a schematic diagram illustrating an intersection structure of the third touch electrode 31 and the fourth touch electrode 32. Two adjacent third touch electrode blocks 311 in the third touch electrodes 31 are connected to the bridging block 301 through via holes 401 on the insulating layer 40, that is, two adjacent third touch electrode blocks 311 are connected in a bridge manner. Two adjacent fourth touch electrode blocks 321 in the fourth touch electrodes 32 are directly connected above the bridge block 301 through the connection line 302, and are insulated from the bridge block 301 by the insulation layer 40. In other embodiments, two corners of two adjacent fourth touch electrode blocks 321 in the fourth touch electrode 32 may directly contact to realize the serial connection of the two adjacent fourth touch electrode blocks 321.
In some embodiments, with reference to fig. 1, when the third touch electrode 31 and the fourth touch electrode 32 are disposed on the same layer, a predetermined gap is formed between the adjacent third touch electrode block 311 and the fourth touch electrode block 321, so that the adjacent third touch electrode blocks and the fourth touch electrode blocks are insulated from each other. When the third touch electrode 31 and the fourth touch electrode 32 are layered, the adjacent third touch electrode block 311 and the fourth touch electrode block 321 are insulated from each other by an insulating layer. At the position where each third touch electrode 31 and each fourth touch electrode 32 intersect with each other, a mutual capacitance is formed between the outer boundary of the third touch electrode block 311 on the third touch electrode 31 and the outer boundary of the fourth touch electrode block 321 on the fourth touch electrode 32, so as to generate a capacitance induction. The plurality of third touch electrodes 31 and the plurality of fourth touch electrodes 32 are crossed in an insulated manner, so that a mutual capacitance array is formed. In the embodiment of the present invention, the determination of the touch position of the non-special-shaped area 10a is realized through the mutual capacitance array formed by the plurality of third touch electrode blocks 311 connected in series and the plurality of fourth touch electrode blocks 321 connected in series.
In fig. 1, the third touch electrode 31 extends along the first direction X, and the fourth touch electrode 32 extends along the second direction Y. In other embodiments, the third touch electrode 31 extends along a third direction, and the fourth touch electrode 32 extends along a fourth direction, and the first direction, the second direction, the third direction and the fourth direction are different, that is, the irregular area 10b and the non-irregular area 10a use different coordinate systems to determine touch coordinates of different areas. The extending directions of the electrodes in the two areas are set to be the same, so that the speed of detecting the touch position can be improved, and the process is simplified.
In some embodiments, the insulating layer 40 is a continuous structure. As shown in fig. 2, the insulating layer 40 located in the irregular region 10b and the non-irregular region 10a is an integral structure, and in the irregular region 10b, the insulating layer 40 covers the first touch electrode block 21 and the second touch electrode block 22 and fills the gap between the adjacent electrode blocks. The insulating layer 40 is set to be a continuous structure body, on one hand, the insulating layers positioned in the special-shaped area and the non-special-shaped area can be formed simultaneously in the process, and the process is simplified; on the other hand, the dielectric constant of the capacitor in the special-shaped area is further increased, so that the capacitance value is increased, and the touch sensitivity of the special-shaped area is improved.
In some embodiments, the insulating layer 40 may be provided as a transparent film layer according to actual needs. The material of the insulating layer 40 may be silicon nitride, silicon oxide, aluminum oxide, hafnium oxide, or another insulating material.
In the following embodiment, the first touch electrode block 21 in the irregular area 10b is a driving electrode, the second touch electrode block 22 is a sensing electrode, and the third touch electrode 31 in the non-irregular area 10a is a driving electrode and the fourth touch electrode 32 is a sensing electrode. In some other embodiments, the two electrodes in any area may be electrically interchanged, that is, the first touch electrode block 21 in the irregular area 10b is set to be a sensing electrode, the second touch electrode block 22 is set to be a driving electrode, the third touch electrode 31 in the non-irregular area 10a is set to be a sensing electrode, and the fourth touch electrode 32 is set to be a driving electrode.
Referring to fig. 1, in some embodiments, a first touch electrode block 21 may be connected to the bonding area 60 disposed on the substrate 10 through a corresponding first lead 51, a second touch electrode block 22 may be connected to the bonding area 60 disposed on the substrate 10 through a corresponding second lead 52, a third touch electrode 31 may be connected to the bonding area 60 disposed on the substrate 10 through a corresponding third lead 53, and a fourth touch electrode 32 may be connected to the bonding area 60 disposed on the substrate 10 through a corresponding fourth lead 54. The touch panel may be connected to an external touch control circuit through the bonding region 60, and the plurality of first touch electrode blocks 21, the plurality of second touch electrode blocks 22, the plurality of third touch electrodes 31, and the plurality of fourth touch electrodes 32 are respectively corresponding to corresponding signal channels of the touch control circuit, thereby forming the touch panel. For example, the first touch electrode blocks 21 and the third touch electrodes 31 are connected to a signal channel of a driving signal (TX) of the touch control circuit, and the second touch electrode blocks 22 and the fourth touch electrodes are connected to a signal channel of a sensing signal (RX) of the touch control circuit.
In some embodiments, the first, second, third and fourth wires 51, 52, 53 and 54 may be made of a metal material such as Mo, moAlMo, tiAlTi, or a transparent conductive material such as ITO.
In some embodiments, the first lead 51 may be directly connected to the first touch electrode block 21, or, referring to fig. 2, the first lead 51 is connected to the first touch electrode block 51 through a via 401 on the insulating layer 40; and/or the second lead 52 may be directly connected to the second touch electrode block 22, or the second lead 52 is connected to the second touch electrode block 22 through a via 401 on the insulating layer 40. The lead wires are layered with the first touch electrode block 21 and the second touch electrode block 22, so that the risk of poor touch caused by lead wire fracture can be avoided.
In some embodiments, a preset gap is formed between two adjacent first touch electrode blocks 21, between two adjacent second touch electrode blocks 22, and between the adjacent first touch electrode blocks 21 and the adjacent second touch electrode blocks 22, so that the adjacent first touch electrode blocks 21 and the adjacent second touch electrode blocks 22 are insulated from each other, and the size of the gap can be adjusted according to actual process requirements and design requirements.
In the special-shaped area 10b, a mutual capacitance is formed between the outer boundary of the first touch electrode block 21 and the outer boundary of the second touch electrode block 22, so that a capacitance induction amount is generated. The plurality of first touch electrode blocks 21 distributed along the first direction X and the plurality of second touch electrode blocks 22 distributed along the second direction Y are insulated and crossed, so that a mutual capacitance array is formed.
When a finger or some other object touches the touch panel, the capacitance value of the mutual capacitance near the touch point changes. In the detection stage, the first touch electrode block 21 receives an excitation signal sent by the touch device, and a touch control circuit in the touch device can obtain the variation of the capacitance value at each position in the mutual capacitance array by detecting the second touch electrode block 22, so as to obtain the coordinate of each touch point.
In some embodiments, the shapes of the first touch electrode block 21, the second touch electrode block 22, the third touch electrode block 311, and the fourth touch electrode block 321 may be diamond, rectangle, triangle, and the like. In this embodiment, in the special-shaped area 10b, the first touch electrode block 21 and the second touch electrode block 22 located in the inner area of the first sensing portion 20 are in a diamond shape, and the first touch electrode block 21 and the second touch electrode block 22 located in the edge area of the first sensing portion 20 are in a triangle shape, wherein the first touch electrode block 21 and the second touch electrode block 22 near the arc-shaped edge can be cut into irregular shapes according to actual needs. In the non-irregular area 10a, the third touch electrode block 311 and the fourth touch electrode block 321 located in the inner area of the second sensing portion 30 are in a diamond shape, and the third touch electrode block 311 and the fourth touch electrode block 321 located in the edge area of the second sensing portion 30 are in a triangle shape. The shape of the electrode block can be adjusted according to actual needs.
In some embodiments, as illustrated in fig. 1, the boundary between the shaped region 10b and the non-shaped region 10a is a straight line, and the electrode blocks in both regions near the boundary may be triangular. In other embodiments, the boundary between the irregular area 10b and the non-irregular area 10a may be a zigzag line, and as shown in fig. 1, four triangular second touch electrode blocks 22 adjacent to the non-irregular area 10a in the irregular area 10b may be divided into four non-irregular area 10a, and four triangular fourth touch electrode blocks 321 adjacent to the non-irregular area 10a may be merged into four diamond-shaped fourth touch electrode blocks 321.
In some embodiments, the first touch electrode block 21, the second touch electrode block 22, the third touch electrode block 311, and the fourth touch electrode block 321 may be made of a patterned conductive material. For example, the first touch electrode block 21, the second touch electrode block 22, the third touch electrode block 311, and the fourth touch electrode block 321 may be made of a material having high light transmittance, such as Indium Tin Oxide (ITO), a nano metal wire of a silver nano wire (AgNW), or graphene, so as to allow backlight display while achieving touch sensing. In other embodiments, at least a portion of at least one of the first touch electrode block 21, the second touch electrode block 22, the third touch electrode block 311, and the fourth touch electrode block 321 is a metal mesh structure 70 shown in fig. 4, and the metal mesh structure 70 may be formed by a plurality of metal wires 71. The material of the metal line 71 may be TiAlTi, and the width of the metal line 71 may be set as required, for example, about 3 μm. The grid pattern of the metal grid structure 70 may be rectangular, square, diamond, hexagonal, or other polygonal shape. In some embodiments, the bridging blocks 301 and the connecting lines 302 in fig. 3 may also be the metal mesh structure 70.
According to the embodiment of the invention, the metal grid structure 70 has good conductivity, ductility and flexibility, and the electrode blocks are arranged into the metal grid structure 70, so that the bending resistance of the touch panel can be improved. Furthermore, the TiAlTi metal grid structure 70 has good conductivity, and can improve the sensitivity of the touch panel.
In some embodiments, the touch panel further includes a protection layer (not shown), referring to fig. 2, the protection layer is disposed on the first lead 51, the second lead 52, and the second conductive layer 320 and covers at least a portion of the first lead 51, the second lead 52, and the second conductive layer 320, so as to provide protection.
Referring to fig. 5, an embodiment of the invention further provides a touch display panel, which may include the display device 200 and the touch panel 100 of any of the above embodiments. According to the touch display panel of the embodiment of the invention, the touch panel 100 includes a substrate 10, a sensing layer and an insulating layer 40. The sensing layer includes a first sensing portion 20 disposed in the irregular region 10b of the substrate 10 and a second sensing portion 30 disposed in the non-irregular region 10a of the substrate 10, the first sensing portion 20 includes a plurality of first touch electrode blocks 21 distributed along a first direction and disposed in an insulated manner, and a plurality of second touch electrode blocks 22 distributed along a second direction and disposed in an insulated manner, and the second sensing portion 30 includes a first conductive layer 310 and a second conductive layer 320. The insulating layer 40 covers the plurality of first touch electrode blocks 21 and the plurality of second touch electrode blocks 22 in the irregular area 10b of the substrate 10, the insulating layer 40 is located between the first conductive layer 310 and the second conductive layer 320 in the non-irregular area 10a of the substrate 10, and the first touch electrode blocks 21 and the second touch electrode blocks 22 are located on the same layer as the first conductive layer 310. In the special-shaped area 10b, the insulating layer 40 is located on the side of the first touch electrode block 21 and the second touch electrode block 22 opposite to the substrate 10, which is equivalent to increase the dielectric constant of the capacitor in the special-shaped area 10b, thereby increasing the capacitance value and improving the touch sensitivity of the special-shaped area 10b, so that the touch panel generates uniform touch signals on the non-special-shaped area 10a and the special-shaped area 10b, and the touch accuracy of the touch panel is improved.
Referring to fig. 6, in some embodiments, the display device 200 includes a plurality of sub-pixels 210 and an isolation region 220 between each adjacent sub-pixel 210, any one of the first touch electrode block 21, the second touch electrode block 22, the third touch electrode block 311, and the fourth touch electrode block 321 of the touch panel 100 is a metal mesh structure 70, and a plurality of metal lines 71 of the metal mesh structure 70 are vertically projected on the touch display panel in the isolation region 220. As shown in fig. 6, one mesh opening of the metal mesh layer 70 corresponds to one sub-pixel. Further, one mesh opening of the metal mesh layer 70 may correspond to N sub-pixels, where N is a positive integer. The width of the metal line 71 is not greater than the width of the isolation region 220, so as to prevent the metal line 71 from blocking the outgoing light. According to the embodiment of the invention, the vertical projection of the metal wires 71 of the metal mesh structure 70 in the isolated area 210 of the touch display panel can avoid affecting the aperture ratio of the sub-pixels, thereby avoiding affecting the resolution of the touch display panel.
The embodiment of the invention also provides a touch display device, which comprises the touch display panel, and the touch display device can be applied to any product or component with a display function, such as virtual reality equipment, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, a wearable watch, an internet of things node and the like. Since the principle of the touch display device for solving the problems is similar to that of the touch display panel, the implementation of the touch display device can be referred to the implementation of the touch display panel, and repeated details are not repeated.
In accordance with the above-described embodiments of the present invention, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. A touch panel, comprising:
the substrate comprises a special-shaped area and a non-special-shaped area adjacent to the special-shaped area;
the induction layer comprises a first induction part and a second induction part, the first induction part is arranged in the special-shaped area of the substrate, and the second induction part is arranged in the non-special-shaped area of the substrate;
the first induction part comprises a plurality of first touch electrode blocks which are distributed along a first direction and are arranged in an insulated mode, and a plurality of second touch electrode blocks which are distributed along a second direction and are arranged in an insulated mode, wherein the first direction and the second direction are mutually crossed, and the second induction part comprises a first conducting layer and a second conducting layer;
the insulating layer covers the first touch electrode blocks and the second touch electrode blocks in the first induction part, the second induction part is located between the first conducting layer and the second conducting layer, and the first touch electrode blocks, the second touch electrode blocks and the first conducting layer are located on the same layer.
2. The touch panel according to claim 1, wherein the second sensing portion includes a plurality of third touch electrodes and a plurality of fourth touch electrodes, each of the third touch electrodes includes a plurality of third touch electrode blocks and a plurality of bridge blocks, adjacent third touch electrode blocks are connected in series by the bridge blocks, and each of the fourth touch electrodes includes a plurality of fourth touch electrode blocks connected in series;
the plurality of bridging blocks are located in the same layer to form the first conductive layer, the plurality of third touch electrode blocks and the plurality of fourth touch electrodes are located in the same layer to form the second conductive layer, and the first conductive layer and the second conductive layer are stacked in the thickness direction of the touch panel.
3. The touch panel of claim 2, wherein at least a portion of at least one of the first touch electrode block, the second touch electrode block, the third touch electrode and the fourth touch electrode is a metal mesh structure, and the metal mesh structure is composed of a plurality of metal wires.
4. The touch panel of claim 2, wherein the third touch electrode extends along the first direction and the fourth touch electrode extends along the second direction; alternatively, the first and second electrodes may be,
the third touch electrode extends along a third direction, the fourth touch electrode extends along a fourth direction, and the first direction, the second direction, the third direction and the fourth direction are different.
5. The touch panel according to claim 1, wherein the second sensing portion comprises a plurality of third touch electrodes and a plurality of fourth touch electrodes;
the plurality of third touch electrodes are located on the same layer to form the first conductive layer, and the plurality of fourth touch electrodes are located on the same layer to form the second conductive layer.
6. The touch panel according to claim 1, further comprising:
each first lead is connected with one first touch electrode block;
each second lead is connected with one second touch electrode block;
at least part of the first lead is directly connected with the first touch electrode block or is connected with the first touch electrode block through a via hole on the insulating layer;
and/or at least part of the second lead is directly connected with the second touch electrode block or is connected with the second touch electrode block through a via hole on the insulating layer.
7. The touch panel according to any one of claims 1 to 6, wherein the insulating layer is a continuous structure, and the insulating layer is made of any one of silicon nitride, silicon oxide, aluminum oxide, and hafnium oxide.
8. A touch display panel comprising a display device and the touch panel according to any one of claims 1 to 7.
9. The touch display panel according to claim 8, wherein the display device comprises a plurality of sub-pixels and an isolation region between adjacent sub-pixels, and a vertical projection of a plurality of metal lines of the metal mesh structure of the touch panel in the isolation region is formed on the touch display panel.
10. A touch display device comprising the touch display panel according to any one of claims 8 to 9.
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| CN111142709B (en) * | 2019-12-27 | 2024-02-23 | 上海摩软通讯技术有限公司 | Touch panel and display device |
| CN111367430A (en) * | 2020-02-25 | 2020-07-03 | 合肥维信诺科技有限公司 | Touch display panel and touch display device |
| CN111708461B (en) * | 2020-06-19 | 2024-03-29 | 京东方科技集团股份有限公司 | Touch module, touch display screen and electronic equipment |
| CN114153336A (en) * | 2020-09-08 | 2022-03-08 | 京东方科技集团股份有限公司 | Touch structure, touch display substrate and touch display device |
| CN112099670B (en) * | 2020-09-11 | 2024-01-23 | 京东方科技集团股份有限公司 | Touch substrate, touch display panel and touch display device |
| CN112181215B (en) * | 2020-09-28 | 2022-09-30 | 武汉天马微电子有限公司 | Touch display panel, touch detection method thereof and electronic equipment |
| CN113721797A (en) * | 2021-11-03 | 2021-11-30 | 烟台正海科技股份有限公司 | Metal grid touch screen |
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| CN109947294B (en) * | 2019-03-18 | 2023-01-24 | 昆山龙腾光电股份有限公司 | Touch display panel and touch display module |
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