CN112612370A - Touch substrate, touch display panel and touch display device - Google Patents
Touch substrate, touch display panel and touch display device Download PDFInfo
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- CN112612370A CN112612370A CN202011459168.0A CN202011459168A CN112612370A CN 112612370 A CN112612370 A CN 112612370A CN 202011459168 A CN202011459168 A CN 202011459168A CN 112612370 A CN112612370 A CN 112612370A
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- 239000000758 substrate Substances 0.000 title claims abstract description 217
- 230000005540 biological transmission Effects 0.000 claims abstract description 125
- 230000003068 static effect Effects 0.000 claims abstract description 75
- 230000005611 electricity Effects 0.000 claims abstract description 52
- 230000001681 protective effect Effects 0.000 claims 1
- 230000006698 induction Effects 0.000 abstract description 5
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 10
- 239000004020 conductor Substances 0.000 description 9
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- 230000006870 function Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000004806 packaging method and process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000002834 transmittance Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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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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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
- H05F3/00—Carrying-off electrostatic charges
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- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention discloses a touch substrate, a touch display panel and a touch display device, wherein the touch substrate comprises a touch area and a non-touch area; the touch area comprises touch electrodes, and the touch electrodes comprise a plurality of touch driving electrodes and a plurality of touch sensing electrodes; the non-touch area comprises a touch signal lead and a first protection lead; the touch signal lead comprises a touch driving lead and a touch sensing lead, the touch driving lead is connected with the touch driving electrode, and the touch sensing lead is connected with the touch sensing electrode; the first protection lead is positioned between the touch drive lead and the touch induction lead; the first end of the first protection lead is connected with the first end of the static electricity transmission structure, and the second end of the first protection lead is connected with the first fixed potential end. According to the invention, two ends of the first protection lead are respectively connected with the static transmission structure and the first fixed potential end, and static electricity can be led into the static transmission structure through the first protection lead, so that a touch electrode is prevented from being damaged by static electricity, and the antistatic capability of the touch substrate is improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a touch substrate, a touch display panel and a touch display device.
Background
In the manufacturing process of the liquid crystal display panel, the accumulation of static charge in the panel is usually generated due to some external factors, such as continuous process operation and transportation or environmental changes. Since glass itself is an insulating material, static charges can stay on the surface of the substrate unless there is a proper discharge path. When the static charge is accumulated to a certain amount, an electric Discharge (ESD) is generated. The electrostatic discharge occurs in a short time, and a large amount of charge is transferred in a short time to generate a very high current, which may cause damage to elements on the panel structure. In order to avoid the electrostatic discharge phenomenon, the display panel is usually protected by providing an electrostatic protection device to discharge the electrostatic charges.
With the higher and higher specifications of the electrostatic protection performance of consumer products by customers, the electrostatic protection performance of the existing display panel is mainly realized by widening the corresponding electrostatic protection line, but for the product with a narrow frame, the line width of the electrostatic protection line does not have enough space to meet the change, and further the electrostatic protection performance of the display panel is limited.
Disclosure of Invention
In view of this, the present invention provides a touch substrate, a touch display panel and a touch display device, in which two ends of a first protection lead are respectively connected to an electrostatic transmission structure and a first fixed potential end, and static electricity can be introduced into the electrostatic transmission structure through the first protection lead, so as to prevent the touch electrode from being damaged by the static electricity, and improve the antistatic capability of the touch substrate.
In one aspect, the invention provides a touch substrate. The touch substrate includes: a touch area and a non-touch area; the touch area comprises touch electrodes, and the touch electrodes comprise a plurality of touch driving electrodes and a plurality of touch sensing electrodes; the non-touch area comprises a touch signal lead and a first protection lead; the touch signal lead comprises a touch driving lead and a touch sensing lead, the touch driving lead is connected with the touch driving electrode, and the touch sensing lead is connected with the touch sensing electrode; the first protection lead is positioned between the touch driving lead and the touch sensing lead; the first end of the first protection lead is connected with the first end of the static electricity transmission structure, and the second end of the first protection lead is connected with the first fixed potential end.
In another aspect, the present invention further provides a touch display panel, including any one of the touch substrates described above.
In another aspect, the invention further provides a touch display device, which includes the touch display panel.
The invention provides a touch substrate, a touch display panel and a touch display device, wherein the touch substrate comprises a touch area and a non-touch area; the touch area comprises touch electrodes, and the touch electrodes comprise a plurality of touch driving electrodes and a plurality of touch sensing electrodes; the non-touch area comprises a touch signal lead and a first protection lead; the touch signal lead comprises a touch driving lead and a touch sensing lead, the touch driving lead is connected with the touch driving electrode, the touch sensing lead is connected with the touch sensing electrode, the first protection lead is positioned between the touch driving lead and the touch sensing lead, the first end of the first protection lead is connected with the first end of the static transmission structure, the second end of the first protection lead is connected with the first fixed potential end, namely, the two ends of the first protection lead are respectively connected with the static transmission structure and the first fixed potential end, and the static transmission structure does not have other functions such as touch control and the like, so that static generated in a non-touch area can be led out through the static transmission structure, the phenomenon that other touch electrodes are subjected to static breakdown is prevented, and the yield of the touch substrate is improved.
Of course, it is not necessary for any product in which the present invention is practiced to specifically achieve all of the above technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic structural diagram of a touch substrate in the prior art;
fig. 2 is a schematic structural diagram of a touch substrate according to the present invention;
FIG. 3 is a cross-sectional view taken along line N-N' of FIG. 2;
fig. 4 is a schematic view of another touch substrate structure provided in the present invention;
fig. 5 is a schematic view of another touch substrate structure provided in the present invention;
fig. 6 is a schematic view of another touch substrate structure provided in the present invention;
fig. 7 is a schematic view of another touch substrate structure provided in the present invention;
fig. 8 is a schematic view of another touch substrate structure provided in the present invention;
FIG. 9 is an enlarged view of a portion of R of FIG. 8;
FIG. 10 is an enlarged view of a portion F of FIG. 9;
FIG. 11 is a further enlarged partial view of F in FIG. 9;
fig. 12 is a schematic view of another touch substrate structure provided in the present invention;
fig. 13 is a schematic view of another touch substrate structure provided in the present invention;
fig. 14 is a schematic view of another touch substrate structure provided in the present invention;
fig. 15 is a schematic view of another touch substrate structure provided in the present invention;
fig. 16 is a schematic view of another touch substrate structure provided in the present invention;
fig. 17 is a schematic view of another touch substrate structure provided in the present invention;
FIG. 18 is an enlarged view of a portion of I in FIG. 17;
FIG. 19 is an enlarged view of a portion J of FIG. 18;
FIG. 20 is a cross-sectional view taken along line M-M' in FIG. 2;
fig. 21 is a schematic view of a touch display panel according to the present invention;
fig. 22 is a schematic view of a touch display device according to the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a touch substrate in the prior art. In a touch substrate 100 provided in the prior art, the touch substrate 100 includes a touch region T and a non-touch region NT; the touch area T comprises a touch electrode 01, and the touch electrode 01 comprises a plurality of touch driving electrodes 011 and a plurality of touch sensing electrodes 012; the non-touch area NT includes a touch signal lead 02 and a first protection lead 03; touch-control signal lead wire 02 includes touch-control drive lead wire 021 and touch-control induction lead wire 022, and touch-control drive lead wire 021 is connected with touch-control drive electrode 011, and touch-control induction lead wire 022 is connected with touch-control induction electrode 012, lies in first protection lead wire 03 between touch-control drive lead wire 021 and touch-control induction lead wire 022 to and first end 031 and the first fixed potential end 04 of first protection lead wire 03 are connected, and the unsettled setting of second end 032 of first protection lead wire 03. In order to improve the electrostatic protection capability of the touch substrate 100, the diameter of the first protection lead 03 may be set to be relatively thicker, so as to reduce the impedance of the first protection lead 03 and improve the electrostatic protection capability. However, in order to realize a narrow frame of the touch substrate 100, the range of the diameter (line width) of the first protection lead 03 is limited, and the electrostatic protection capability of the touch substrate 100 cannot be effectively improved. In addition, since the second end 032 of the first protection lead 03 is disposed in the air in the prior art, when the first protection lead 03 generates an electrostatic discharge phenomenon, the touch electrode 012a corresponding to the second end 032 of the first protection lead 03 is broken down, so that the touch capability of the touch substrate 100 is reduced.
In order to solve the above technical problems, the present invention provides a touch substrate, a touch display panel and a touch display device. Embodiments of the touch substrate, the touch display panel and the touch display device provided in the present invention will be described in detail below.
In this embodiment, please refer to fig. 2, and fig. 2 is a schematic structural diagram of a touch substrate according to the present invention. The touch substrate 200 in the present embodiment includes: a touch area Q and a non-touch area NQ; the touch area Q comprises touch electrodes P, and the touch electrodes P comprise a plurality of touch driving electrodes P1 and a plurality of touch sensing electrodes P2; the non-touch area NQ includes a touch signal lead L and a first guard lead GU 1; the touch signal lead L comprises a touch driving lead L1 and a touch sensing lead L2, the touch driving lead L1 is connected with the touch driving electrode P1, and the touch sensing lead L2 is connected with the touch sensing electrode P2; the first protection lead GU1 is located between the touch driving lead L1 and the touch sensing lead L2; the first end a of the first guard lead GU1 is connected to the first end s1 of the electrostatic transmission structure 1, and the second end b of the first guard lead GU1 is connected to the first fixed potential terminal 2. The first protection lead GU1 can avoid coupling crosstalk between the touch sensing lead L2 and the touch driving lead L1, thereby improving touch reliability.
The touch signal lead L includes a touch driving lead L1 and a touch sensing lead L2, and the first guard lead GU1 is located between the touch driving lead L1 and the touch sensing lead L2, that is, the orthographic projection of the first guard lead GU1 on the plane of the substrate base (not shown in the figure) of the touch base 200 is located between the orthographic projection of the touch driving lead L1 on the plane of the substrate base of the touch base 200 and the orthographic projection of the touch sensing lead L2 on the plane of the substrate base of the touch base 200, so as to prevent signal interference between the touch driving lead L1 and the touch sensing lead L2 and improve touch reliability.
Optionally, the touch substrate 200 further includes a connection bridge V, because the touch region Q includes the touch electrode P, and the touch electrode P includes a plurality of touch driving electrodes P1 and a plurality of touch sensing electrodes P2, in order to achieve normal signal transmission of the touch driving electrodes P1 and the touch sensing electrodes P2, in general, the touch driving electrodes P1 and the touch sensing electrodes P2 in the same row/column may be connected through the connection bridge, wherein only one of the touch driving electrodes P1 and the touch sensing electrodes P2 may be connected through the connection bridge, fig. 2 only illustrates that the touch driving electrodes P1 in the same column are connected through the connection bridge V, and the touch sensing electrodes P2 in the same row may be directly connected to each other. The connecting bridge V is generally disposed on a different layer from the touch driving electrode P1, but the invention is not limited thereto, and may be disposed according to an actual film layer.
It is understood that during the manufacturing process of the touch substrate 200, static charge accumulation is usually generated in the substrate due to some external factors, such as continuous process operation and transportation or environmental changes. When the static charge is accumulated to a certain amount, an Electrostatic Discharge (ESD) is generated, and the voltage of the static charge is much larger than each voltage value in the surface of the touch substrate 200, so that the touch electrode P and other elements on the substrate structure are damaged. In order to avoid the phenomenon that the touch substrate is damaged by the electrostatic discharge, the first protection lead GU1 is arranged to conduct and release the electrostatic charge, so as to protect the touch substrate. Further, the first end a of the first protection lead GU1 is connected to the first end s1 of the electrostatic transmission structure 1, the second end b of the first protection lead GU1 is connected to the first fixed potential end 2, that is, two ends of the first protection lead GU1 are respectively connected to the electrostatic transmission structure 1 and the first fixed potential end 2, wherein the first fixed potential end 2 can be a low potential end, so that static electricity is transmitted between the first fixed potential end 2, the first protection lead GU1 and the electrostatic transmission structure 1, because the electrostatic transmission structure 1 does not need to have other functions such as touch control, static electricity can be led out to the electrostatic transmission structure 1 through the first protection lead GU1, that is, static electricity is released on the electrostatic transmission structure 1, the possibility that each element on the touch substrate 200 is subjected to electrostatic breakdown is reduced, and further improvement of the yield of the touch substrate 200 can be facilitated. And because this application only need set up the both ends of first protection lead GU1 and be connected with electrostatic transmission structure 1 and first fixed potential end 2 respectively, need not to increase the diameter of first protection lead GU1, be favorable to realizing touch substrate 200's narrow frame. In the present invention, the electrostatic transmission structure 1 may be located in the touch area Q or the non-touch area NQ, and fig. 2 only illustrates that the electrostatic transmission structure 1 is located in the touch area Q, but the present invention is not limited thereto, and the specific position of the electrostatic transmission structure 1 may be set according to the actual situation, and will not be described in detail below. It will be appreciated that the voltage at the first fixed potential terminal is typically a lower voltage, such as ground, or a lower voltage, to achieve better electrostatic conduction.
In some alternative embodiments, and as shown in continued reference to fig. 2 and 3, fig. 3 is a cross-sectional view taken along the direction N-N' of fig. 2. In the touch substrate 200 provided in this embodiment, the electrostatic transmission structure 1 and the touch electrode P are on the same layer.
It can be understood that the touch substrate 200 includes a substrate 00, and a touch electrode P and an electrostatic transmission structure 1 are formed on the substrate 00, wherein the electrostatic transmission structure 1 is disposed on the same layer as the touch electrode P, the connecting bridge V is disposed on the same layer as the touch electrode P, and the connecting bridge V is disposed on the same layer as the touch driving electrode P1 and the touch sensing electrode P2, and further includes an insulating layer 10 disposed between the connecting bridge V and the touch sensing electrode P2 for insulating the connecting bridge V from the touch sensing electrode P2. Further, in the touch substrate 200 provided in this embodiment, the electrostatic transmission structure 1 and the touch electrode P are on the same layer, so as to avoid increasing the thickness of the touch substrate 200, which is beneficial to thinning the touch substrate 200.
Optionally, the electrostatic transmission structure 1 and the touch electrode P are disposed on the same layer and material. The electrostatic transmission structure 1 and the touch electrode P can be formed in the same process, which is beneficial to the manufacturing process of the touch substrate 200. Since the electrostatic transmission structure 1 and the touch electrode P are disposed on the same layer and made of the same material, the touch electrode P may be formed of ITO (Indium Tin Oxide) or other transparent conductive materials, and since the touch electrode P is made of a transparent conductive material, the light transmittance of the touch substrate 200 may be prevented from being reduced. Further, the electrostatic delivery structure 1 may be formed of ITO (Indium Tin Oxide) or other transparent conductive material. When the electrostatic transmission structure 1 is disposed in the touch region Q, the electrostatic transmission structure 1 can be prevented from affecting the light transmittance of the touch substrate 200. When the electrostatic transmission structure 1 is disposed in the non-touch area NQ, the electrostatic transmission structure 1 may be made of a transparent conductive material or may be made of other conductive materials.
In some alternative embodiments, with reference to fig. 2, in the touch substrate 200 provided in this embodiment, the electrostatic transmission structure 1 is located in the touch region Q, and an orthogonal projection of the electrostatic transmission structure 1 on the plane of the touch substrate 200 is located between an orthogonal projection of the touch driving electrode P1 on the plane of the touch substrate 200 and an orthogonal projection of the touch sensing electrode P2 on the plane of the touch substrate 200.
It can be understood that, in general, the transmission of the touch driving signal between two adjacent touch driving electrodes P1 is realized through a connecting bridge, and similarly, the transmission of the touch sensing signal between two adjacent touch sensing electrodes P2 is also realized through a connecting structure, and a resistance abrupt change region is generated at the connecting bridge due to a pattern change or a material change, where static electricity is easily released to damage the touch electrodes, so that the touch performance of the touch substrate is disabled. According to the touch control substrate 200, the electrostatic transmission structure 1 is arranged between the touch control driving electrode P1 and the touch control sensing electrode P2, namely, the touch control driving electrode P1 and the touch control sensing electrode P2 are separated by the electrostatic transmission structure 1, so that static electricity between the touch control driving electrode P1 and the touch control sensing electrode P2 can be captured, the static electricity is led out to the electrostatic transmission structure 1 connected with the first fixed potential end 2, the phenomenon that the static electricity is accumulated inside the touch control substrate 200 to break through the touch control driving electrode P1 and/or the touch control sensing electrode P2 is avoided, the accuracy of signals inside the touch control substrate 200 is guaranteed, and the yield of the touch control substrate 200 is high. In this embodiment, since the electrostatic transmission structure 1 is located in the touch region Q, the electrostatic transmission structure 1 may also be formed of ITO or other transparent conductive materials. The electrostatic transmission structure 1 is prevented from affecting the light transmittance of the touch substrate 200, and the width of the frame can be reduced.
The orthographic projection of the electrostatic transmission structure 1 on the plane of the touch substrate 200 is located between the orthographic projection of the touch driving electrode P1 on the plane of the touch substrate 200 and the orthographic projection of the touch sensing electrode P2 on the plane of the touch substrate 200, and there is no specific requirement on whether the electrostatic transmission structure 1 penetrates the touch region Q along the first direction X, as shown in fig. 2, the electrostatic transmission structure 1 does not penetrate the touch region Q along the first direction X, and one side of the electrostatic transmission structure 1, which is far away from the first guard lead GU1, is located inside the touch region Q (excluding a transition region position where the touch region Q is not in contact with the touch region NQ), as long as static electricity is led out to the electrostatic transmission structure 1, so that static electricity is prevented from accumulating inside the touch substrate 200, and the risk that each element on the touch substrate 200 is broken down by static electricity can be reduced.
In some optional embodiments, referring to fig. 4, fig. 4 is a schematic view of another touch substrate structure provided in the present invention. In the touch substrate 200 of the present embodiment, the electrostatic transmission structure 1 penetrates the touch region Q along the first direction X.
It can be understood that, in the embodiment, the electrostatic transmission structure 1 penetrates the touch region Q along the first direction X, which is equivalent to the electrostatic transmission structure 1 completely separates the touch driving electrode P1 and the touch sensing electrode P2, so that static electricity between the touch driving electrode P1 and the touch sensing electrode P2 can be completely led out to the electrostatic transmission structure 1, thereby preventing static electricity from accumulating inside the touch substrate 200 to break through the touch driving electrode P1 and/or the touch sensing electrode P2, and ensuring the touch accuracy of the touch substrate 200 and the yield of the touch substrate 200.
In some optional embodiments, referring to fig. 5, fig. 5 is a schematic view of a structure of another touch substrate provided in the present invention. In the touch substrate 200 of the present embodiment, the non-touch region NQ further includes a second guard lead GU2, an orthographic projection of the second guard lead GU2 on the plane of the touch substrate 200 is spaced apart from an orthographic projection of the first guard lead GU1 on the plane of the touch substrate 200, and the second guard lead GU2 is connected to the second fixed potential terminal 3.
The orthographic projection of the second guard lead GU2 on the plane of the touch substrate 200 is spaced from the orthographic projection of the first guard lead GU1 on the plane of the touch substrate 200, and further the orthographic projection of the touch drive lead L1 and/or the touch sense lead L2 on the plane of the touch substrate 200 is located in the orthographic projection of the second guard lead GU2 on the plane of the touch substrate 200 and the orthographic projection of the first guard lead GU1 on the plane of the touch substrate 200, that is, the second guard lead GU2 is disposed at the outermost edge of the trace of the touch substrate 200, so the second guard lead GU2 can also be used for guiding out static electricity generated by packaging or other reasons in the non-touch area of the touch substrate 200, further avoiding the touch substrate 200 from being damaged by static electricity, and improving the yield of the touch substrate 200.
It is understood that when the touch substrate 200 is used subsequently, the touch region Q is touched and then generates a corresponding signal for touch detection, however, the touch region Q may be caused by static electricity that may be carried by a human finger or other touch media, and the non-touch region NQ further includes the second protection lead GU2, and the second protection lead GU2 can lead out a large amount of static electricity to prevent touch failure caused by static electricity damage to the touch substrate 200.
Optionally, referring to fig. 6, fig. 6 is a schematic structural diagram of another touch substrate provided in the present invention. The second guard lead GU2 is of a segmented design, i.e., the second guard lead GU2 has a discontinuity. Compared to the second protection lead GU2 shown in fig. 5, the second protection lead GU2 shown in fig. 6 can more effectively guide out static electricity generated by packaging the touch substrate 200, further prevent the touch substrate 200 from being damaged by static electricity, and improve the yield of the touch substrate 200. In addition, since the interval between the orthographic projection of the second protection lead GU2 on the plane of the touch substrate 200 and the orthographic projection of the first protection lead GU1 on the plane of the touch substrate 200 is a gap between the orthographic projection of the second protection lead GU2 on the plane of the touch substrate 200 and the orthographic projection of the touch electrode P on the plane of the touch substrate 200, that is, when the breakdown problem occurs at the position where the second protection lead GU2 is interrupted by static electricity, the touch electrode P is not affected, and the touch capability of the touch substrate 200 can be ensured. The specific structural design of the second protection lead GU2 is not limited in the present invention, and may be set according to actual situations, which is not described in detail below.
In some optional embodiments, referring to fig. 7, fig. 7 is a schematic view of another touch substrate structure provided in the present invention. The touch substrate 200 provided in this embodiment: the second protection lead GU2 is connected to the second end s2 of the electrostatic transmission structure 1.
It is understood that the first terminal s1 of the electrostatic transmission structure 1 is connected to the first terminal a of the first guard lead GU1, and the second terminal b of the first guard lead GU1 is connected to the first fixed potential terminal 2, the second terminal s2 of the electrostatic transmission structure 1 is connected to the second guard lead GU2, and the second guard lead GU2 is connected to the second fixed potential terminal 3. Equivalent to the electrostatic transmission structure 1, a loop is formed by the first protection lead GU1 and the second protection lead GU2, so as to change an electrostatic path, so that static electricity is released in the loop, thereby effectively guiding out static electricity in the touch substrate 200, further preventing the touch substrate 200 from being damaged by static electricity, and improving the yield of the touch substrate 200.
In some optional embodiments, referring to fig. 8, fig. 8 is a schematic view of a structure of another touch substrate provided in the present invention. The touch substrate 200 provided in this embodiment: the electrostatic transmission structure 1 is located in the non-touch area NQ.
The electrostatic transmission structure 1 and the touch electrode P in the touch area Q may be disposed on the same layer, so that the electrostatic transmission structure 1 and the touch electrode P are formed in the same process, which is beneficial to the manufacturing process of the touch substrate 200, and the electrostatic transmission structure 1 may be made of a transparent conductive material or may be made of other conductive materials.
It can be understood that the electrostatic transmission structure 1 is disposed in the non-touch area NQ, and further, the first end a of the first guard lead GU1 is connected to the first end s1 of the electrostatic transmission structure 1, the second end b of the first guard lead GU1 is connected to the first fixed potential end 2, namely, both ends of the first guard lead GU1 are connected to the electrostatic transmission structure 1 and the first fixed potential terminal 2 respectively, since the electrostatic transmission structure 1 does not need to set other functions such as touch control, the static electricity in the non-touch area NQ is conducted to the electrostatic transmission structure 1 through the static electricity on the first protection lead GU1, that is, static electricity is discharged on the static electricity transmission structure 1, so as to prevent static electricity from being discharged through the top end of the first protection lead GU1 suspended in the air and damaging the touch electrode nearby, therefore, the possibility of electrostatic breakdown of each element on the touch substrate 200 is reduced, and the yield of the touch substrate 200 can be improved. And because this application only need set up the both ends of first protection lead GU1 and be connected with electrostatic transmission structure 1 and first fixed potential end 2 respectively, need not to increase the diameter of first protection lead GU1, be favorable to realizing touch substrate 200's narrow frame. In addition, because the touch signal leads reflect light (e.g., external ambient light) transmitted into the touch substrate, and when the densities of the touch signal leads in different areas in the non-touch area are different, the reflection conditions of the light in the different areas are also different, which causes non-uniform reflection of the touch substrate, the electrostatic transmission structure 1 can also be a block structure, and the touch signal leads are covered as much as possible in a direction perpendicular to the touch substrate 200, which can improve the reflection uniformity of the touch substrate, and avoid large reflection difference caused by too large density difference of the touch signal leads at different positions, thereby affecting visual perception.
In some alternative embodiments, shown in fig. 8-10, fig. 9 is a partial enlarged view of R in fig. 8, and fig. 10 is a partial enlarged view of F in fig. 9. In the touch substrate 200 provided in this embodiment, the electrostatic transmission structure 1 is connected to the second protection lead GU2 through a plurality of via holes 4.
The number of the via holes 4 and the diameter of the via holes are not specifically required, and the number and the diameter of the via holes may be set according to actual conditions, and fig. 10 only illustrates that the electrostatic transmission structure 1 and the second protection lead GU2 are connected by a plurality of via holes 4, and the diameters of the plurality of via holes 4 are equal.
It can be understood that, in this embodiment, there is no limitation on whether the electrostatic transmission structure 1 and the second protection lead GU2 are disposed in the same layer, and when the electrostatic transmission structure 1 and the second protection lead GU2 are disposed in different layers, the electrostatic transmission structure 1 and the second protection lead GU2 are connected through the plurality of through holes 4. On the one hand, two ends of the second protection lead GU2 are connected to the electrostatic transmission structure 1 and the second fixed potential terminal 3, respectively. The second protection lead GU2 can lead out a large amount of static electricity to prevent the touch substrate 200 from being damaged by the static electricity. On the other hand, the electrostatic transmission structure 1 is connected with the second protection lead GU2 through a plurality of via holes 4, which is equivalent to forming a parallel structure, and is favorable for reducing the connection impedance between the second protection lead GU2 and the electrostatic transmission structure 1, and static electricity can be better released at the second protection lead GU2, so that the electrostatic discharge capability of the touch substrate 200 can be improved, and the mode of connecting through a plurality of via holes is also favorable for process stability.
With reference to fig. 8 to 10, in the touch substrate 200 provided in the present embodiment, the electrostatic transmission structure 1 and the first protection lead GU1 are also connected through a plurality of vias 4.
It can be understood that, in this embodiment, there is no limitation on whether the electrostatic transmission structure 1 and the first protection lead GU1 are disposed on the same layer, and when the second protection lead electrostatic transmission structure 1 and the first protection lead GU1 are disposed on different layers, the electrostatic transmission structure 1 and the first protection lead GU1 are connected through the plurality of through holes 4. On the one hand, the two ends of the first protection lead GU1 are respectively connected to the electrostatic transmission structure 1 and the first fixed potential end 2, so that the static electricity of the non-touch area NQ is led out to the electrostatic transmission structure 1 through the static electricity on the first protection lead GU1, the possibility that other elements on the touch substrate 200 are subjected to electrostatic breakdown is reduced, and the yield of the touch substrate 200 can be improved. On the other hand, the electrostatic transmission structure 1 is connected through a plurality of via holes 4 with first protection lead GU1, is equivalent to the electrostatic transmission structure 1 and first protection lead GU1 parallel connection, is favorable to reducing the impedance of first protection lead GU1, and static can obtain better release at first protection lead GU1, and then can improve touch substrate 200's electrostatic discharge ability.
In some alternative embodiments, and as shown in continued reference to fig. 8, 9 and 11, fig. 11 is a further enlarged view of a portion F of fig. 9. In the touch substrate 200 provided in this embodiment, the electrostatic transmission structure 1 is electrically connected to the second protection lead GU2 through a via hole; along the first direction X, the line width of the first guard lead GU1 is H1The line width of the second guard lead GU2 is H2The maximum length of the via hole is H3Wherein，H1≥H3≥1/2H1Or H2≥H3≥1/2H2。
It is understood that, as shown in fig. 11, the present embodiment defines that the electrostatic transmission structure 1 is electrically connected to the second guard lead GU2 through a via hole; along the first direction X, the line width of the first guard lead GU1 is H1The line width of the second guard lead GU2 is H2The maximum length of the via hole is H3Wherein H is1≥H3≥1/2H1Or H2≥H3≥1/2H2. The touch substrate shown in fig. 11 is different from the touch substrate shown in fig. 10 in that the electrostatic transmission structure 1 in the touch substrate shown in fig. 11 is electrically connected to the second protection lead GU2 through a via hole, and the maximum length of the via hole is longer, that is, the contact area where the electrostatic transmission structure 1 and the second protection lead GU2 are electrically connected is larger than the contact area where the electrostatic transmission structure 1 and the second protection lead GU2 shown in fig. 10 are electrically connected, which is more favorable for guiding out a large amount of electrostatic current, preventing the touch substrate 200 from being damaged by electrostatic shock, and more effectively reducing the impedance of the second protection lead GU2, so that the electrostatic discharge can be better released at the second protection lead GU2, and the electrostatic discharge capability of the touch substrate 200 is improved.
Optionally, as shown in fig. 11, the electrostatic transmission structure 1 in the touch substrate is electrically connected to the first protection lead GU1 through a via hole, and the maximum length of the via hole is longer, that is, the contact area between the electrostatic transmission structure 1 and the first protection lead GU1 is larger than the contact area between the electrostatic transmission structure 1 and the first protection lead GU1 shown in fig. 10, which is more favorable for leading out a large amount of electrostatic current, preventing the touch substrate 200 from being damaged by electrostatic shock, and more effectively reducing the impedance of the first protection lead GU1, so that the electrostatic can be better released at the first protection lead GU1, and the electrostatic discharge capability of the touch substrate 200 is improved.
Optionally, the electrostatic transmission structure 1 in the touch substrate is electrically connected to the first protection lead GU1 through one or more via holes, and/or the electrostatic transmission structure 1 is electrically connected to the second protection lead GU2 through one or more via holes, one of which isThe maximum length of each via hole is H in FIG. 113Wherein H is1≥H3≥1/2H1Or H2≥H3≥1/2H2. In the invention, how the first protection lead GU1 and the second protection lead GU2 are connected with the electrostatic transmission structure 1 is not specifically limited, and may be set according to actual situations, and will not be described in detail below.
In some optional embodiments, referring to fig. 12 and 13, fig. 12 is a schematic view of a structure of another touch substrate provided by the present invention, and fig. 13 is a schematic view of a structure of another touch substrate provided by the present invention. The touch substrate 200 provided in this embodiment: the touch area Q further comprises a first virtual electrode P0, wherein an orthographic projection of the first virtual electrode P0 on the plane of the touch substrate 200 is located between an orthographic projection of the touch driving electrode P1 on the plane of the touch substrate 200 and an orthographic projection of the touch sensing electrode P2 on the plane of the touch substrate 200; the first end c1 of the first dummy electrode P0 is connected to the second guard lead GU 2.
The touch area Q further includes a first dummy electrode P0, the number of the first dummy electrodes P0 may be one or more, fig. 12 only illustrates that one first dummy electrode P0 is included, fig. 13 only illustrates that a plurality of first dummy electrodes P0 are included, the number and the corresponding position of the first dummy electrodes P0 are not specifically required, and the first dummy electrodes P0 and the corresponding position may be set according to the situation of static electricity in the actual touch substrate 200, which is not described in detail below.
It can be understood that the orthographic projection of the first virtual electrode P0 on the plane of the touch substrate 200 is located between the orthographic projection of the touch driving electrode P1 on the plane of the touch substrate 200 and the orthographic projection of the touch sensing electrode P2 on the plane of the touch substrate 200, that is, the touch driving electrode P1 and the touch sensing electrode P2 are separated by the first virtual electrode P0, so that static electricity between the touch driving electrode P1 and the touch sensing electrode P2 can be conducted to the first virtual electrode P0, thereby preventing static electricity from accumulating inside the touch substrate 200 to break through the touch driving electrode P1 and/or the touch sensing electrode P2, and ensuring the accuracy of signals inside the touch substrate 200 and the yield of the touch substrate 200. In this embodiment, since the first dummy electrode P0 is located in the touch region Q, the first dummy electrode P0 may also be formed of ITO or other transparent conductive materials. The electrostatic transmission structure 1 is prevented from affecting the light transmittance of the touch substrate 200.
In some optional embodiments, referring to fig. 14, fig. 14 is a schematic view of a structure of another touch substrate provided in the present invention. The touch substrate 200 provided in this embodiment: the second end c2 of the first dummy electrode P0 is connected to the second guard lead GU 2.
It can be understood that the first end c1 of the first dummy electrode P0 is connected to the second guard lead GU2, and the second end c2 of the first dummy electrode P0 is connected to the second guard lead GU 2. The first dummy electrode P0 and the second protection leads GU2 located at two opposite sides of the touch area Q form a loop, so that static electricity is released in the loop, static electricity generated by packaging the touch substrate 200 is effectively led out, the touch substrate 200 is further prevented from being damaged by static electricity, and the yield of the touch substrate 200 is improved. One or more of the first dummy electrodes P0 and the second guard lead GU2 may form a loop, and fig. 14 only uses one of the first dummy electrodes P0 and the second guard lead GU2 to form a loop as an example.
In some optional embodiments, referring to fig. 15, fig. 15 is a schematic view of a structure of another touch substrate provided by the present invention. The touch substrate 200 provided in this embodiment: the second guard lead GU2 at least partially surrounds the touch area Q; the non-touch area NQ further includes a ground signal line GND located on a side of the second guard lead GU2 away from the touch area Q, the ground signal line GND is connected to the ground signal terminal 5, and the ground signal line GND at least partially surrounds the touch area Q.
It can be understood that the non-touch area NQ of the touch substrate 200 provided in this embodiment further includes a ground signal line GND located on a side of the second guard lead GU2 away from the touch area Q, the ground signal line GND is connected to the ground signal terminal 5, and the ground signal line GND at least partially surrounds the touch area Q. In other words, the second protection lead GU2 and the ground signal terminal 5 are disposed at the edge of the non-touch area NQ of the touch substrate 200, which can effectively improve the electrostatic discharge capability of the touch substrate 200 compared to the case where only the second protection lead GU2 is disposed. And the grounding signal line GND is disposed at the outermost edge of the circuit of the touch substrate 200, so that the grounding signal line GND can also be used for guiding static electricity generated by packaging the touch substrate 200 to the grounding signal terminal 5, thereby further preventing the touch substrate 200 from being damaged by static electricity and improving the yield of the touch substrate 200.
The second guard lead GU2 at least partially surrounds the touch area Q, and the ground signal line GND at least partially surrounds the touch area Q, it can be understood that the second guard lead GU2 and the ground signal line GND may be designed in a sectional manner, as shown in fig. 15, fig. 15 only uses the second guard lead GU2 to be set in two sections, and the ground signal line GND is set as a whole piece, but the present invention is not limited thereto, and may be set according to actual situations, and details are not described below.
In some optional embodiments, referring to fig. 16 and fig. 17 to 19, fig. 16 is a schematic view of a structure of another touch substrate provided by the present invention, fig. 17 is a schematic view of a structure of another touch substrate provided by the present invention, fig. 18 is a partially enlarged view of I in fig. 17, and fig. 19 is a partially enlarged view of J in fig. 18. The touch substrate 200 provided in this embodiment: the ground signal line GND is connected to the second end s2 of the electrostatic transmission structure 1, and the second protection lead GU2 is connected to the electrostatic transmission structure 1.
It can be understood that, with reference to fig. 16, the electrostatic transmission structure 1 is located in the touch region Q, and the orthographic projection of the electrostatic transmission structure 1 on the plane of the touch substrate 200 is located between the orthographic projection of the touch driving electrode P1 on the plane of the touch substrate 200 and the orthographic projection of the touch sensing electrode P2 on the plane of the touch substrate 200, and the electrostatic transmission structure 1 is further limited to be connected to the ground signal line GND and the second guard lead GU2, so that the electrostatic transmission structure 1 is utilized to lead out the electrostatic between the touch driving electrode P1 and the touch sensing electrode P2, static electricity can be led out to the grounding signal terminal 5 through the grounding signal line GND, so that the static electricity is prevented from accumulating inside the touch substrate 200 and breaking through the touch driving electrode P1 and/or the touch sensing electrode P2, and the accuracy of signals inside the touch substrate 200 and the yield of the touch substrate 200 are ensured. Referring to fig. 17 to 19, the electrostatic transmission structure 1 is located in the non-touch region NQ, the ground signal line GND is connected to the second end s2 of the electrostatic transmission structure 1, and the second protection lead GU2 is connected to the electrostatic transmission structure 1. The electrostatic transmission structure 1 may be connected to the second guard lead GU2 and the ground signal line GND through the via 4. On the one hand, the electrostatic transmission structure 1 is connected with the second protection lead GU2 and the ground signal line GND, so that static electricity of the non-touch area NQ is led out to the electrostatic transmission structure 1 through the second protection lead GU2 and the ground signal line GND, the possibility that other elements on the touch substrate 200 are subjected to electrostatic breakdown is reduced, and the improvement of the yield of the touch substrate 200 can be facilitated. On the other hand, the electrostatic transmission structure 1 can be connected with the second protection lead GU2 and the ground signal line GND through the via hole 4, which is equivalent to the electrostatic transmission structure 1 connected in parallel with the second protection lead GU2, and the electrostatic transmission structure 1 connected in parallel with the ground signal line GND is favorable for reducing the impedance of the first protection lead GU1, and the static can be better released at the first protection lead GU1, so that the static releasing capability of the touch substrate 200 can be improved.
In some alternative embodiments, shown in conjunction with fig. 2 and 20, fig. 20 is a cross-sectional view taken along line M-M' of fig. 2. The touch substrate 200 provided in this embodiment includes a substrate 00, a touch lead L and a first protection lead GU1 are in the same layer, and the first protection lead GU1 and the touch electrode P are in different layers.
It is to be understood that, in order to intuitively describe the relationship between the touch lead L, the first guard lead GU1 and the touch electrode P, only the touch lead L, the first guard lead GU1 and the touch electrode P are illustrated in fig. 20, and other structures are not illustrated, and fig. 12 only takes the touch sensing lead L2 and the first guard lead GU1 as the same layer, and the first guard lead GU1 and the touch sensing electrode P2 as an example. The touch lead L and the first protection lead GU1 are formed in the same layer, so that the touch lead L and the first protection lead GU1 are formed in the same process, which is beneficial to the manufacturing process of the touch substrate 200. In addition, the first protection lead GU1 is layered with the touch electrode P, so that the distance between the first protection lead GU1 and the touch electrode P can be further increased, thereby preventing static electricity from being released at the first protection lead GU1 to affect the touch electrode P, and improving the yield of the touch substrate 200.
The present invention further provides a touch display panel 300, which includes the touch substrate 200 according to any of the above embodiments of the present invention. The touch substrate 200 of the present invention can be a touch substrate manufactured separately, or a touch substrate manufactured by using a film structure in a display panel as a substrate (e.g., a packaging layer, TFE), and thus, the thickness of the touch display panel can be significantly reduced. Fig. 21 is a schematic view of a touch display panel provided in the present invention, and referring to fig. 21, the touch display panel 30 includes a touch substrate 200 provided in any of the embodiments of the present invention. The embodiment of fig. 21 is only an example of a mobile phone, and the touch display panel 300 is described, it is understood that the touch display panel 300 provided in the embodiment of the present invention may be other display devices with a display function, such as a computer, a television, a vehicle-mounted display device, and the present invention is not limited thereto. The touch display panel 300 provided in the embodiment of the present invention has the beneficial effects of the touch substrate 200 provided in the embodiment of the present invention, and specific reference is specifically made to the specific description of the touch substrate 200 in the foregoing embodiments, which is not repeated herein.
The present invention further provides a touch display device 400, which includes the touch display panel 300 according to any of the above embodiments of the present invention. Fig. 22 is a schematic view of a touch display device according to the present invention, and referring to fig. 22, a touch display device 400 includes the touch display panel 300 according to any of the embodiments of the present invention. The embodiment of fig. 22 is only an example of a mobile phone, and the touch display device 400 is described, it is understood that the touch display device 400 provided in the embodiment of the present invention may be other display devices with a display function, such as a computer, a television, a vehicle-mounted display device, and the present invention is not limited thereto. The touch display device 400 provided in the embodiment of the present invention has the beneficial effects of the touch display panel 300 provided in the embodiment of the present invention, and specific reference is specifically made to the specific description of the touch display panel 300 in the foregoing embodiments, which is not repeated herein.
As can be seen from the above embodiments, the touch substrate, the touch display panel and the touch display device provided in the present invention at least achieve the following beneficial effects:
the invention provides a touch substrate, a touch display panel and a touch display device, wherein the touch substrate comprises a touch area and a non-touch area; the touch area comprises touch electrodes, and the touch electrodes comprise a plurality of touch driving electrodes and a plurality of touch sensing electrodes; the non-touch area comprises a touch signal lead and a first protection lead; the touch signal lead comprises a touch driving lead and a touch sensing lead, the touch driving lead is connected with the touch driving electrode, the touch sensing lead is connected with the touch sensing electrode, the first protection lead is positioned between the touch driving lead and the touch sensing lead, the first end of the first protection lead is connected with the first end of the static transmission structure, the second end of the first protection lead is connected with the first fixed potential end, namely, the two ends of the first protection lead are respectively connected with the static transmission structure and the first fixed potential end, and the static transmission structure does not have other functions such as touch control and the like, so that static generated in a non-touch area can be led out through the static transmission structure, the phenomenon that other touch electrodes are subjected to static breakdown is prevented, and the yield of the touch substrate is improved.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (16)
1. A touch substrate, comprising:
a touch area and a non-touch area;
the touch area comprises touch electrodes, and the touch electrodes comprise a plurality of touch driving electrodes and a plurality of touch sensing electrodes;
the non-touch area comprises a touch signal lead and a first protection lead;
the touch signal lead comprises a touch driving lead and a touch sensing lead, the touch driving lead is connected with the touch driving electrode, and the touch sensing lead is connected with the touch sensing electrode;
the first protection lead is positioned between the touch driving lead and the touch sensing lead; the first end of the first protection lead is connected with the first end of the static electricity transmission structure, and the second end of the first protection lead is connected with the first fixed potential end.
2. The touch substrate of claim 1, wherein the electrostatic transmission structure is in the same layer as the touch electrode.
3. The touch substrate of claim 2, wherein the electrostatic transmission structure is located in the touch area, and an orthogonal projection of the electrostatic transmission structure on a plane of the touch substrate is located between an orthogonal projection of the touch driving electrode on the plane of the touch substrate and an orthogonal projection of the touch sensing electrode on the plane of the touch substrate.
4. The touch substrate of claim 3, wherein the electrostatic transmission structure penetrates the touch area along a first direction.
5. The touch substrate of claim 1, wherein the non-touch area further comprises a second guard lead, an orthographic projection of the second guard lead on the plane of the touch substrate is spaced from an orthographic projection of the first guard lead on the plane of the touch substrate, and the second guard lead is connected to a second constant potential terminal, and a voltage of the second constant potential terminal is less than or equal to a ground voltage.
6. The touch substrate of claim 5, wherein the second protection lead is connected to the second end of the electrostatic transmission structure.
7. The touch substrate of claim 6, wherein the electrostatic transmission structure is located in the non-touch area.
8. The touch substrate of claim 6, wherein the electrostatic transmission structure is connected to the second protection lead by a plurality of vias.
9. The touch substrate of claim 6, wherein the electrostatic transmission structure is electrically connected to the second protection lead through a via hole;
along a first direction, the line width of the first protection lead is H1The line width of the second protective lead is H2The maximum length of the via hole is H3Wherein H is1≥H3≥1/2H1Or H2≥H3≥1/2H2。
10. The touch substrate of claim 5, wherein the touch area further comprises a first virtual electrode, and an orthogonal projection of the first virtual electrode on the plane of the touch substrate is located between an orthogonal projection of the touch driving electrode on the plane of the touch substrate and an orthogonal projection of the touch sensing electrode on the plane of the touch substrate;
the first end of the first virtual electrode is connected with the second protection lead.
11. The touch substrate of claim 10, wherein the second end of the first dummy electrode is connected to the second guard lead.
12. The touch substrate of claim 5, wherein the second guard lead at least partially surrounds the touch area;
the non-touch area further comprises a grounding signal line which is located on one side, away from the touch area, of the second protection lead, the grounding signal line is connected with a grounding signal end, and at least part of the grounding signal line surrounds the touch area.
13. The touch substrate of claim 12, wherein the ground signal line is connected to the second end of the electrostatic transmission structure, and the second protection lead is connected to the electrostatic transmission structure.
14. The touch substrate of claim 1, wherein the touch signal lead and the first guard lead are on the same layer, and the first guard lead and the touch electrode are on different layers.
15. A touch display panel comprising the touch substrate according to any one of claims 1 to 14.
16. A touch display device comprising the touch display panel according to claim 15.
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Effective date of registration: 20211021 Address after: No.8, liufangyuanheng Road, Donghu New Technology Development Zone, Wuhan City, Hubei Province, 430074 Applicant after: WUHAN TIANMA MICRO-ELECTRONICS Co.,Ltd. Applicant after: Wuhan Tianma Microelectronics Co.,Ltd. Shanghai Branch Address before: Room 509, building 1, No. 6111, Longdong Avenue, Pudong New Area, Shanghai, 201201 Applicant before: SHANGHAI TIANMA AM-OLED Co.,Ltd. |
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