CN112650413B - Touch sensor and display device - Google Patents
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- CN112650413B CN112650413B CN202011605381.8A CN202011605381A CN112650413B CN 112650413 B CN112650413 B CN 112650413B CN 202011605381 A CN202011605381 A CN 202011605381A CN 112650413 B CN112650413 B CN 112650413B
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Classifications
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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
-
- 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
-
- 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
- G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
-
- 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
- G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
Abstract
The invention discloses a touch sensor and a display device, comprising a basal layer; a first sensing electrode and a second sensing electrode disposed on the base layer and insulated from each other; and a first connection portion electrically connecting adjacent first sensing electrodes and a bridging portion electrically connecting adjacent second sensing electrodes, orthographic projections of the first connection portion and the bridging portion on the substrate layer overlapping; the first connecting part comprises at least one layer of conductive pattern stacking structure; alternatively, the bridge portion at least includes a layer of conductive pattern stacked structure; therefore, the connection strength between the adjacent first sensing electrodes or the adjacent second sensing electrodes is enhanced, in addition, the parallel connection of the conductive patterns and the metal layer in the first connection part or the parallel connection of the conductive patterns and the metal layer in the bridging part can further reduce the resistance of the bridging position, further increase the capacity of conducting charges, better release static electricity accumulated at the bridging position, avoid the breakage of the adjacent first sensing electrodes or the adjacent second sensing electrodes, and further ensure the sensitivity of touch control.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a touch sensor and a display device.
Background
In recent years, with the development of man-machine interaction technology, touch technology has been increasingly applied. A Touch Screen (Touch Screen) is an inductive display device that can receive input signals from a finger or other contact. The touch screen comprises an inductive touch screen, a capacitive touch screen, a resistive touch screen and the like, wherein the capacitive touch screen mainly utilizes the conductivity of a human body to control the screen, and the touch position is determined through the capacitance change of a touch area.
With the continuous development of display technology, the customer experience and reliability are improved, and the demand for touch sensors or touch panels with high resolution and high sensitivity is still increasing.
Disclosure of Invention
In one aspect, the invention provides a touch sensor with good reliability and high sensitivity.
Specifically, the substrate layer is included; a first sensing electrode and a second sensing electrode disposed on the base layer and insulated from each other; and a first connection portion electrically connecting adjacent first sensing electrodes and a bridging portion electrically connecting adjacent second sensing electrodes, the orthographic projections of the first connection portion and the bridging portion on the base layer overlapping; the first connection part comprises at least one layer of conductive pattern stacking structure;
alternatively, the bridge portion at least includes a stacked structure of conductive patterns.
In another aspect of the present invention, there is provided a touch sensitive display device including the touch sensor and having high image quality.
The invention has the following beneficial effects:
according to the touch sensor and the display device provided by the embodiment of the invention, the first linking part or the bridging part which is orthographically projected and overlapped on the substrate layer is arranged to be of the stacked structure at least comprising one layer of conductive pattern, so that the connection strength between the adjacent first sensing electrodes or the adjacent second sensing electrodes is enhanced. The touch sensor can be effectively applied to a display device with high resolution to improve the electrical performance and touch performance.
Drawings
FIG. 1 is a schematic top plan view of a touch sensor in an embodiment of the invention;
FIG. 2a is a cross-sectional view of a touch sensor according to an embodiment of the invention;
FIG. 2b is a schematic cross-sectional view of a touch sensor according to an embodiment of the invention;
FIG. 3 is a schematic top plan view of a touch sensor sensing an electrode configuration in an embodiment of the invention;
FIG. 4 is a schematic top plan enlarged view of a touch sensor sensing an electrode configuration in an embodiment of the invention;
FIG. 5 is a cross-sectional view of a touch sensor according to an embodiment of the invention;
FIG. 6 is a cross-sectional view of a touch sensor according to an embodiment of the invention;
FIG. 7 is a schematic top plan view of a conductive pattern in a touch sensor in accordance with an embodiment of the present invention;
FIG. 8 is a schematic top plan view of a conductive pattern in a touch sensor in accordance with an embodiment of the present invention;
FIG. 9 is a cross-sectional view of a touch sensor according to an embodiment of the invention;
FIG. 10a is a schematic top plan view of a conductive pattern in a touch sensor in accordance with an embodiment of the present invention;
FIG. 10b is a schematic top plan view of one conductive pattern in a touch sensor in accordance with an embodiment of the invention;
FIG. 11a is a cross-sectional view of a touch sensor according to an embodiment of the invention;
FIG. 11b is a cross-sectional view of a touch sensor according to an embodiment of the invention;
FIG. 12a is a cross-sectional view of a touch sensor according to an embodiment of the invention;
FIG. 12b is a cross-sectional view of a touch sensor according to an embodiment of the invention;
FIG. 13 is a cross-sectional view of a touch sensor according to an embodiment of the invention;
FIG. 14 is a cross-sectional view of a touch sensor according to an embodiment of the invention;
fig. 15 is a schematic structural diagram of a display device according to an embodiment of the invention.
Detailed Description
The following describes a specific implementation of a touch sensor and a display device according to embodiments of the present invention in detail with reference to the accompanying drawings. It should be noted that the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
FIG. 1 is a schematic top plan view of a touch sensor in an embodiment of the invention; fig. 2a and 2b are sectional views of a touch sensor according to an embodiment of the present invention, and specifically fig. 2a and 2b are partial sectional views of an area labeled "AA" in fig. 1.
Referring to fig. 1 and 2a and 2b, the touch sensor 100 includes a substrate layer 30 and sensing electrodes disposed on the substrate layer 30, wherein the sensing electrodes include a first sensing electrode 10 and a second sensing electrode 20 insulated from each other.
The substrate layer 30 may include a film-type substrate layer, and in particular may be a carrier substrate layer for forming the first and second sensing electrodes 10 and 20; alternatively, the object or the workpiece may be formed with the first sensing electrode 10 and the second sensing electrode 20. In some specific embodiments, the base layer 30 may further include a display panel on which the first and second sensing electrodes 10 and 20 are directly formed, for example, on a surface of a flexible encapsulation film layer of the display panel.
By way of example, the base layer 30 may include a substrate or film material commonly used in touch sensors, such as: glass, polymer and/or inorganic insulating material. The polymer may include polyethylene terephthalate (PET), cyclic Olefin Polymer (COP), polyacrylate (PAR), polyetherimide (PEI), polyethylene naphthalate (PEN), polyphenylene sulfide (PPS), polyallyl, polyimide (PI), cellulose Acetate Propionate (CAP), polyethersulfone (PES), cellulose Triacetate (TAC), polycarbonate (PC), cyclic Olefin Copolymer (COC), polymethyl methacrylate (PMMA), and the like. The inorganic insulating material may include silicon oxide, silicon nitride, silicon oxynitride, metal oxide, or the like.
In one possible embodiment, the first sensing electrodes 10 are arranged in a first direction, extend in a second direction, the second sensing electrodes 20 are arranged in a second direction, extend in the first direction, and the first direction and the second direction intersect, e.g., the first direction and the second direction are perpendicular to each other; the first direction may be parallel to the top surface of the substrate layer 30 and the second direction may be parallel to the top surface of the substrate layer 30.
In some embodiments, the first sensing electrodes 10 adjacent in the second direction may be electrically or physically connected through the first connection part 11; specifically, the first connection part 11 may be formed in the same layer as the first sensing electrode 10. In this case, the second sensing electrodes 20 adjacent in the second direction may be electrically connected to each other through the bridge 21, whereby the orthographic projections of the first connection portion 11 and the bridge 21 on the base layer 30 overlap; it should be noted that, the bridge portion 21 is specifically located on the side of the first connecting portion 11 near the substrate layer 30 or the side of the bridge portion 21 far from the substrate layer 30, and the present invention is not limited thereto, and the bridge portion 21 is illustratively disposed on the side of the first connecting portion 11 far from the substrate layer 30 in the top plan view for clarity of the illustration, and the cross-sectional view is still drawn according to the side of the bridge portion 21 disposed on the side of the first connecting portion 11 near the substrate layer 30.
As illustrated in fig. 2a and 2b, an insulating layer 50 and the first and second sensing electrodes 10 and 20 may be formed on the base layer 30, the insulating layer 50 may be formed at an intersection region (i.e., a projection overlapping region) of the first and second sensing electrodes 10 and 20 to cover the first connection portion 11 of the first sensing electrode 10, and the bridge portion 21 is formed on the insulating layer 50 and electrically connected to the second sensing electrodes 20 adjacent to each other.
The insulating layer 50 may include an inorganic insulating material such as silicon oxide, silicon nitride, or an organic insulating material such as an acrylic-based resin, a siloxane-based resin, or the like.
The touch sensor further comprises a sensing area A and a wiring area B, wherein the first sensing electrode 10, the first connecting part 11, the second sensing electrode 20 and the bridging part 21 are arranged on the substrate layer 30 of the sensing area A, and the pin 60 is arranged on the substrate layer 30 of the wiring area B; the electrical signal generated by the touch is transmitted to the driving chip through the touch trace input pin 60, and thus, the touch signal is sensed.
Fig. 3 is a schematic top plan view of a touch sensor sensing an electrode configuration in an embodiment of the invention.
In another embodiment, referring to fig. 3, the touch sensor 100 may further include a second connection portion 12 between two first connection portions 11, the second connection portion 12 is located between adjacent second sensing electrodes 20, and a width D1 of the first connection portion 11 along the second direction is smaller than a width D2 of the second connection portion 12 along the second direction.
In the embodiment shown in fig. 3, the first sensing electrodes 10 electrically connected adjacent in the second direction include two connection parts, i.e., a first connection part 11 and a second connection part 12, the second connection part 12 is located between the two first connection parts 11 and between the adjacent second sensing electrodes 20 in the first direction, and a width D1 of the first connection part 11 in the first direction is smaller than a width D2 of the second connection part 12 in the first direction. Based on the structures of the first connection portion 11 and the second connection portion 12, the second sensing electrodes 20 adjacent in the first direction are electrically connected by at least two bridge portions 21, and the orthographic projections of the first connection portion 11 and the bridge portions 21 on the base layer 30 overlap. When one of the bridges 21 breaks, the rest of the bridges 21 still transmit signals to the two adjacent second sensing electrodes 20, so that the risk of touch failure caused by the broken bridge is reduced, and the reliability of touch is improved. In addition, the second connection portion 12 is widened, so that the resistance of the connection portion between the adjacent first sensing electrodes 10 is further reduced, and the amount of charges passing through the first connection portion 11 and the second connection portion 12 can be increased when the display panel is operated, thereby improving the sensitivity of the touch sensor.
It should be further noted that, due to the widening process performed on the first connection portion 11, the width of the first connection portion 11 along the extending direction of the first connection portion 11 may be as narrow as possible, so that the length of the bridge portion 21 is as short as possible, on one hand, the visibility of the bridge portion 21 is reduced, and the display effect is ensured, on the other hand, the overlapping area of the first sensing electrode 10 and the second sensing electrode 20 may be reduced, and when the touch operation is performed, the signal interference between the first sensing electrode 10 and the second sensing electrode 20 may be reduced, so as to improve the sensitivity of the touch sensor.
The inventors have found that, as the connection portion of the adjacent sensing electrodes, the first connection portion and the bridging portion are narrower than the width of the sensing electrode (the width herein refers to the direction intersecting the extending direction of the first sensing electrode in a plan view, for example, the width is perpendicular), and as an example, in the use process, external charges are input to the first sensing electrode and the second sensing electrode through the touch signal line connected with the first sensing electrode and the second sensing electrode, the width is narrower, which means that there is a larger resistance, charges are easily accumulated in the first connection portion and the bridging portion, after the charges are accumulated to a certain extent, the energy is accumulated to "burst" the film layer, so that the signal transmission of the first sensing electrode and the second sensing electrode is blocked, the touch is failed, and the second connection portion is widened, although the problem that the resistance of the connection portion between the adjacent sensing electrodes is larger is solved, the touch sensitivity can be improved through more charge flow, but the first connection portion and the bridging portion are relatively narrower, the risk of the energy accumulation is more severely projected to the "burst" the film layer "is worse.
In addition, in some embodiments, the touch sensor may be bent, and the risk of breakage is very high due to the weakness of the first connection portion and the bridging portion.
Referring to fig. 2a and 2b in combination with fig. 4-6, fig. 4 is a schematic top plan enlarged view of a touch sensor sensing an electrode structure according to an embodiment of the present invention; FIG. 5 is a cross-sectional view of a touch sensor according to an embodiment of the invention; FIG. 6 is a cross-sectional view of a touch sensor according to an embodiment of the invention; specifically, fig. 4 is an enlarged view of a portion of the first connection portion and the bridge portion of the bit sensing electrode, and fig. 4 and 5 are sectional views of fig. 1 or C-C1 of fig. 4. The first connection portion 11 includes at least one stacked structure of conductive patterns 70, and referring to fig. 5, the conductive patterns 70 are directly stacked with other metal layers in the first connection portion 11, so as to enhance the strength of the first connection portion 11 and improve the ESD resistance. Or the bridge portion 21 may further include at least one layer of stacked structure of conductive patterns 70, where the conductive patterns 70 are directly stacked with other metal layers in the bridge portion 21, so as to enhance the strength of the first connection portion 11 and improve the ESD resistance. It should be noted that only one conductive pattern 70 is illustrated in the drawings, and it can be understood that if two or more conductive patterns 70 are provided, the strength, flexibility and ESD resistance of the first connection portion 11 or the bridge portion 21 are better, and when the conductive patterns 70 are stacked with the metal layers in the first connection portion 11 or the bridge portion 21, an inorganic insulating layer may be further provided between the conductive patterns 70 and the metal layers, which will not be described in detail herein.
The specific shape of the conductive pattern may be matched according to the design of the first connection portion 11 or the bridge portion 21, as shown in fig. 7-8 and 10, fig. 7, 8 and 10 respectively illustrate schematic top plan views of one conductive pattern in the touch sensor according to the embodiment of the present invention; when the conductive pattern 70 is stacked with the metal layer in the first connection portion 11, the pattern thereof may be set in the same shape as the pattern of the first connection portion 11, and the ratio may be appropriately adjusted; when the conductive pattern 70 is stacked with the metal layer in the bridge portion 21, the pattern thereof may be set in the same shape as the pattern of the bridge portion 21, and the ratio may be appropriately adjusted; in addition, the conductive pattern 70 may be provided according to the need, as shown in fig. 10, and the present invention is not particularly limited.
In an alternative embodiment, the material of the conductive pattern includes any one of graphene, an organic conductive material, a metal, an alloy, a metal wire, carbon nanotubes, PEDOT, or a transparent oxide. Among them, graphene is a hexagonal single-layer structure formed of carbon atoms, graphene has a two-dimensional ballistic transport characteristic, and two-dimensional ballistic transport of charges in a graphene material means transport in a state where there is little resistance caused by scattering, and therefore, the charge mobility of graphene is very high. Researches show that graphene has excellent optical performance, single-layer graphene absorbs 2.3% of visible light and reflects 0.1% of visible light (which can be ignored), namely, the transmittance is 97.7%, so that the graphene has high transparency, and when the graphene is applied to a touch sensor, the performance of the touch sensor can be ensured, and meanwhile, the certain transmittance of the touch sensor can be ensured.
In an alternative embodiment, the materials of the first sensing electrode, the second sensing electrode, the bridging portion, the first connecting portion and the second connecting portion include any one or more of metal, alloy, metal wire or transparent oxide.
For example, the first sensing electrode, the second sensing electrode, and the bridge portion may include silver (Ag), gold (Au), copper (Cu), aluminum (Al), platinum (Pt), palladium (Pd), chromium (Cr), titanium (Ti), tungsten (W), niobium (Nb), tantalum (Ta), vanadium (V), iron (Fe), manganese (Mn), cobalt (Co), nickel (Ni), zinc (Zn), or an alloy thereof, and may be used alone or in combination.
The first sensing electrode, the second sensing electrode, the bridge portion, the first connection portion and the second connection portion may include transparent oxide such as Indium Tin Oxide (ITO), indium Zinc Oxide (IZO), zinc indium oxide (IZTO), zinc oxide (ZnO), chromium Tin Oxide (CTO), and the like.
In an alternative embodiment, the first connection part 11 includes the first metal layer 111 and the conductive pattern 70 sequentially stacked. It should be noted that, as shown in fig. 5, reference is made to the foregoing description and the specific stacking position of the conductive patterns 70 is not limited in the present invention.
In an alternative embodiment, please refer to fig. 9 in combination with fig. 7, fig. 9 is a cross-sectional view of a touch sensor according to an embodiment of the present invention; specifically, FIG. 9 is a cross-sectional view at C-C1 in FIG. 1 or FIG. 7. The first connection portion 11 includes a first metal layer 111, a first insulating layer 80, and a conductive pattern 70 sequentially stacked, and the conductive pattern 70 covers the first insulating layer 80 along the first connection portion 11 in the extending direction and is connected in parallel with the first metal layer 111. The specific stacking position of the conductive patterns 70 is not limited in this embodiment, and fig. 9 illustrates that the conductive patterns 70 are located on the side of the first metal layer 111 away from the bridge portion 21, and the conductive patterns 70 may be located on the side of the first metal layer 111 close to the bridge portion 21. Specifically, the first insulating layer 80 may include an inorganic insulating material such as silicon oxide, silicon nitride, or an organic insulating material such as an acrylic-based resin, a silicone-based resin, or the like. Providing the conductive pattern 70 stacked with the first metal layer 111 ensures the strength and toughness of the first connection portion 11, and at the same time, the conductive pattern 70 is parallel-connected with the first metal layer 111, thereby further reducing the resistance of the first connection portion 11 and increasing the charge flow. When there is an electrostatic charge accumulation, as shown in fig. 9, the charge Q has at least two paths for discharging (including when the plurality of conductive patterns 70 are arranged in parallel), that is, one path of the first metal layer 111 and at least one path of the conductive pattern 70, which greatly enhances the antistatic ability of the first connection portion 11. In addition, even when the charge is accumulated to cause the film layer to be burst, as at least one layer of conductive pattern and the first metal layer are arranged in a plurality of layers, one path is split, the transmission of touch signals can be ensured by other paths, the banding effect of single-layer crack diffusion is reduced, and the touch reliability is further improved.
In an alternative embodiment, please refer to fig. 11a and 11b in combination with fig. 9-10 a, wherein fig. 11a and 11b are cross-sectional views of a touch sensor according to an embodiment of the present invention; specifically, fig. 11a is a cross-sectional view at D-D1 in fig. 10a, fig. 11B is a cross-sectional view at E-E1 in fig. 10a, a side of the touch sensor 100 away from the substrate layer is further covered with a second insulating layer 40, and referring to fig. 2 in combination, the second insulating layer 40 may protect the first sensing electrode 10 and the second sensing electrode 20 and the first connection portion 11 (other connection portions such as the aforementioned second connection portion 12) and the bridge portion 21 on the sensing area a, and may further extend to the wiring area B. The second insulating layer 40 may include an inorganic insulating material such as silicon oxide, silicon nitride, or an organic insulating material such as an acrylic-based resin, a siloxane-based resin, or the like. A portion of the second insulating layer 40 penetrates the conductive pattern 70, dividing the conductive pattern 70 into at least two sub-conductive patterns 71 extending in the extending direction along the first connection portion 11 and arranged in parallel and insulated from each other.
Similarly, the conductive pattern 70 of the present embodiment is located on a side of the first metal layer 111 away from the bridge portion 21, and the conductive pattern 70 may also be located on a side of the first metal layer 111 close to the bridge portion 21. Specifically, the first insulating layer 80 may include an inorganic insulating material such as silicon oxide, silicon nitride, or an organic insulating material such as an acrylic-based resin, a silicone-based resin, or the like. In this embodiment, the conductive pattern 70 is further divided by a portion of the second insulating layer 40, and the conductive pattern 70 is illustratively divided into two sub-conductive patterns 71 that extend along the first connecting portion 11 in the extending direction, are arranged in parallel and are insulated from each other, or may be multiple sub-conductive patterns, so that the strength and toughness of the first connecting portion 11 are ensured, and the conductive pattern 70 and the first metal layer 111 are arranged in parallel, so that the resistance of the first connecting portion 11 is further reduced, and the charge flow is increased. When electrostatic charges are accumulated, as shown in fig. 9 and 10a, the charges Q have at least three paths for discharging, i.e., one path of the first metal layer 111 and two paths of the sub-conductive patterns 71, greatly enhancing the antistatic ability of the first connection portion 11. In addition, even when the charge is accumulated to cause the film layer to be burst, as at least one sub conductive pattern and a plurality of paths of the first metal layer are split, the transmission of touch signals can be ensured by other paths, the linkage effect of single-layer crack diffusion is reduced, and the touch reliability is improved greatly.
Further, in an alternative embodiment, please refer to fig. 12a and 12b in combination with fig. 9 and 10b, fig. 12a and 12b are cross-sectional views of a touch sensor according to an embodiment of the present invention; in particular, FIG. 12a is another cross-sectional view at D-D1 in FIG. 10b, and FIG. 12b is another cross-sectional view at E-E1 in FIG. 10 b. Part of the first insulating layer 80 also penetrates the first metal layer 111, dividing the first metal layer 111 into first sub-metal layers 1111 corresponding to the sub-conductive patterns 71 and insulated from each other. In this embodiment, the first insulating layer 80 adaptively divides the first metal layer 111 to increase the charge release path. As set forth in the present embodiment, when electrostatic charges are accumulated, the charges Q have at least four paths for discharging, i.e., two paths for the first sub-metal layer 1111 and two paths for the sub-conductive patterns 71, which greatly enhance the antistatic ability of the first connection portion 11 and simultaneously ensure the strength and toughness of the first connection portion 11. Because the at least one sub-conductive pattern and the at least one first metal layer are split along a plurality of paths, transmission of touch signals can be guaranteed by other paths, the associated effect of single-layer crack propagation is reduced, and the touch reliability is greatly improved.
It should be further noted that, if the first sub-metal layer 1111 is disposed corresponding to the sub-conductive pattern 71, the second insulating layer 40 may directly penetrate through the first metal layer 111 to obtain the first sub-metal layer 1111; in addition, the first sub-metal layer 1111 and the sub-conductive pattern 71 may not be arranged in a one-to-one correspondence, for example, may be arranged in a staggered manner, so as to increase the charge release path.
In another alternative embodiment, the bridge portion 21 includes the second metal layer 211 and the conductive pattern 70 stacked in order. Referring to fig. 6, the foregoing details are omitted herein, and it should be noted that the specific stacking positions of the conductive patterns 70 are not limited in the present invention.
Alternatively, the bridge portion 21 includes the second metal layer 211, the third insulating layer 90, and the conductive pattern 70, which are sequentially stacked. Referring to fig. 13 in combination with fig. 4 and 8, fig. 13 is a cross-sectional view of a touch sensor according to an embodiment of the invention; in particular, FIG. 13 is another cross-sectional view at C-C1 in FIG. 4 or another cross-sectional view at F-F1 in FIG. 8. That is, the third insulating layer 90 is further included between the conductive pattern 70 and the second metal layer 211, and the third insulating layer 90 may include an inorganic insulating material such as silicon oxide, silicon nitride, or an organic insulating material such as an acryl-based resin, a siloxane-based resin, or the like, by way of example. The shape of the conductive pattern 70 may be the same as the shape of the third metal layer 211, and the ratio may be adaptively adjusted. This arrangement ensures the strength and toughness of the bridge 21. Fig. 13 illustrates that the conductive pattern 70 is disposed on a side close to the first connection portion 11, but may be disposed on a side far from the first connection portion 11, and the present invention is not limited thereto.
Alternatively, the bridge portion 21 is electrically connected to the second sensing electrode 30 through the via hole 22, and the via hole 22 penetrates the third insulating layer 90 and the conductive pattern 70 to be electrically connected to the second metal layer 211. Referring to fig. 14, fig. 14 is a cross-sectional view of a touch sensor according to an embodiment of the invention; the via 22 penetrates through the third insulating layer 90 and the conductive pattern 70 to realize that the conductive pattern 70 is connected in parallel with the second metal layer 211, thus further reducing the resistance of the bridge portion, increasing the charge release amount, and increasing the charge release paths, and at least comprising two charge release paths (including the path of the second metal layer 211 when the multi-layer conductive pattern 70 is arranged in parallel), namely the path of the at least one conductive pattern 70, greatly enhancing the antistatic capability, strength and toughness of the bridge portion 21. Because the at least one conductive pattern and the multiple paths of the second metal layer are split, the transmission of the touch signal can be ensured by other paths, the continuous band effect of single-layer crack diffusion is reduced, and the touch reliability is also improved.
The conductive pattern 70 may be selected to be the same material as the first connection portion or the conductive pattern 70 may be selected to be the same material as the bridge portion such that the voltage dividing capability of each path is equivalent.
The thickness of the conductive pattern isSpecifically, the thickness of the conductive pattern stacked in the first connection portion 11 may be selected +.>The thickness of the first connecting portion 11 is adaptively matched so that the partial pressure capability of each path is equivalent. The thickness of the conductive pattern in the bridge 21 can be chosen +.> The thickness of the bridge portion 21 is adaptively matched so that the partial pressure capability of each path is equivalent.
In addition, it should be noted that the conductive pattern 70 in this case may be formed by using a conventional exposure and etching process, or may be formed by using other process flows capable of forming the conductive pattern 70, which is not limited in this case.
It can be understood that, when the display panel works, the first sensing electrode 10 may be a touch driving electrode to send a touch signal, and the second sensing electrode 20 may be a touch sensing electrode to receive the signal sent by the first sensing electrode 10.
Alternatively, when the display panel works, the second sensing electrode 20 may be a touch driving electrode to send a touch signal, and the first sensing electrode 10 may be a touch sensing electrode to receive the signal sent by the second sensing electrode 20.
The embodiment of the invention further provides a display device 200, as shown in fig. 15, and fig. 15 is a schematic structural diagram of the display device in the embodiment of the invention. The display device includes any of the touch sensors 100 described above, for example, the touch sensor 100 may be embedded between a window in the display device and a display panel, and the display panel may include a pixel circuit including a Thin Film Transistor (TFT) and a light emitting unit connected to the pixel circuit. The pixel circuit may include an arrangement of the light emitting cells with regularly arranged electrodes and wirings, such as data lines, scan lines, power lines, and the like. The light emitting unit may include a liquid crystal device or an OLED device, and may include a pixel electrode and an opposite electrode. When the display panel is a flexible package display panel, the touch sensor 100 may be disposed on a top surface of the flexible package.
In a specific implementation, the display device may be: a cell phone (as shown in fig. 15), a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and any other product or component having a display function. The implementation of the display device can be referred to the embodiment of the touch sensor, and the repetition is not repeated.
According to the touch sensor and the display device provided by the embodiment of the invention, the first linking part or the bridging part which is orthographically projected and overlapped on the substrate layer is arranged to be of the stacked structure at least comprising one layer of conductive pattern, so that the connection strength between the adjacent first sensing electrodes or the adjacent second sensing electrodes is enhanced. The touch sensor can be effectively applied to a display device with high resolution to improve the electrical performance and touch performance.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (12)
1. A touch sensor, comprising:
a base layer;
a first sensing electrode and a second sensing electrode disposed on the base layer and insulated from each other; and a first connection portion electrically connecting adjacent first sensing electrodes and a bridging portion electrically connecting adjacent second sensing electrodes, the orthographic projections of the first connection portion and the bridging portion on the base layer overlapping;
the first connecting part comprises a first metal layer, a first insulating layer and a conductive pattern which are sequentially laminated, wherein the conductive pattern covers the first insulating layer along the extending direction of the first connecting part and is connected with the first metal layer in parallel;
or,
the bridge portion includes a second metal layer, a third insulating layer, and a conductive pattern stacked in this order.
2. The touch sensor of claim 1, wherein the touch sensor is configured to,
when the first connection portion includes a first metal layer, a first insulating layer, and a conductive pattern stacked in this order;
also included is a method of manufacturing a semiconductor device,
and one side far away from the substrate layer is also covered with a second insulating layer, part of the second insulating layer penetrates through the conductive patterns, and the conductive patterns are divided into at least two sub conductive patterns which extend along the first connecting part along the extending direction, are arranged in parallel and are mutually insulated.
3. The touch sensor of claim 2, wherein,
and part of the first insulating layer also penetrates through the first metal layer, and the first metal layer is divided into first sub-metal layers which correspond to the sub-conductive patterns and are mutually insulated.
4. The touch sensor of claim 1, wherein the touch sensor is configured to,
when the bridge portion includes a second metal layer, a third insulating layer and a conductive pattern laminated in this order,
the bridge portion is electrically connected with the second sensing electrode through a via hole, and the via hole penetrates through the third insulating layer and the conductive pattern to be electrically connected with the second metal layer.
5. A touch sensor according to any one of claims 1-3,
when the first connection portion includes a first metal layer, a first insulating layer and a conductive pattern laminated in this order, the conductive pattern has a thickness of
6. The touch sensor of claim 4, wherein,
when the bridge portion includes a second metal layer, a third insulating layer and a conductive pattern laminated in this order,
the thickness of the conductive pattern is
7. The touch sensor of claim 1, wherein the touch sensor is configured to,
the material of the conductive pattern comprises any one of graphene, organic conductive material, metal, alloy, carbon nano tube or transparent oxide.
8. The touch sensor of claim 1, wherein the touch sensor is configured to,
and a second connecting part between two first connecting parts, the second connecting part is positioned between the adjacent second sensing electrodes,
the first sensing electrode, the second sensing electrode, the bridging portion, the first connecting portion and the second connecting portion are made of any one or more of metal, alloy or transparent oxide.
9. The touch sensor of claim 1, wherein the touch sensor is configured to,
the first sensing electrode is a touch control driving electrode, and the second sensing electrode is a touch control sensing electrode; or the first sensing electrode is a touch sensing electrode, and the second sensing electrode is a touch driving electrode.
10. The touch sensor of claim 1, wherein the touch sensor is configured to,
the first sensing electrodes are arranged along a first direction and extend along a second direction, the second sensing electrodes are arranged along the second direction and extend along the first direction, and the first direction and the second direction are intersected.
11. The touch sensor of claim 10, wherein the touch sensor is configured to,
the touch screen also comprises second connecting parts positioned between the two first connecting parts, wherein the second connecting parts are positioned between the adjacent second sensing electrodes, and the width of the first connecting parts along the second direction is smaller than that of the second connecting parts along the second direction.
12. A display device comprising a touch sensor according to any of the preceding claims 1-11.
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