CN112612370B - 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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- CN112612370B CN112612370B CN202011459168.0A CN202011459168A CN112612370B CN 112612370 B CN112612370 B CN 112612370B CN 202011459168 A CN202011459168 A CN 202011459168A CN 112612370 B CN112612370 B CN 112612370B
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- 230000005611 electricity Effects 0.000 abstract description 51
- 238000010586 diagram Methods 0.000 description 24
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- 238000005859 coupling reaction Methods 0.000 description 1
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- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
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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
- G06F3/0416—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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- Theoretical Computer Science (AREA)
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- 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 a touch electrode, and the touch electrode comprises 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 control driving lead and the touch control sensing lead; the first end of the first protection lead is connected with the first end of the electrostatic transmission structure, and the second end of the first protection lead is connected with the first fixed potential end. According to the invention, the two ends of the first protection lead are respectively connected with the static electricity transmission structure and the first fixed potential end, static electricity can be led into the static electricity transmission structure through the first protection lead, static electricity is prevented from damaging the touch electrode, and the antistatic capability of the touch substrate is improved.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a touch substrate, a touch display panel, and a touch display device.
Background
In the production process of liquid crystal display panels, static charge accumulation in the panel is often generated due to some external factors, such as continuous process operations and handling or environmental changes. Since glass itself is an insulating substance, static charge remains on the substrate surface unless there is an appropriate discharge path. When static charge builds up to a certain amount, a discharge will occur (ESD, electrostatic Discharge). The electrostatic discharge occurs in a short period of time and a large amount of charge is transferred in a short period of time, resulting in extremely high current flow and destruction of the elements of 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 electrostatic charges.
As the specification of the electrostatic protection performance of customers on consumer products is higher and higher, the electrostatic protection capability of the existing display panel is mainly achieved by widening the corresponding electrostatic protection line, but for products with narrow frames, the line width of the electrostatic protection line is insufficient to meet the change, so that 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, wherein two ends of a first protection lead are respectively connected with an electrostatic transmission structure and a first fixed potential end, and the electrostatic 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 electrostatic and improve the antistatic capability of the touch substrate.
In one aspect, the invention provides a touch substrate. The touch substrate includes: a touch region and a non-touch region; the touch area comprises a touch electrode, and the touch electrode comprises 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 electrostatic transmission structure, and the second end of the first protection lead is connected with the first fixed potential end.
In yet another aspect, the present invention further provides a touch display panel, including any one of the above touch substrates.
In still another aspect, the present invention further provides a touch display device, including 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 a touch electrode, and the touch electrode comprises 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 a touch driving electrode, the touch sensing lead is connected with a 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 static generated in a non-touch area can be led out through the static transmission structure due to the fact that the static transmission structure does not have other functions such as touch, the occurrence of static breakdown of other touch electrode phenomena is prevented, and the yield of the touch substrate is improved.
Of course, it is not necessary for any one product embodying the invention to achieve all of the above technical effects at the same time.
Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention, 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 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 the N-N' direction in FIG. 2;
fig. 4 is a schematic structural diagram of another touch substrate according to the present invention;
fig. 5 is a schematic structural diagram of another touch substrate according to the present invention;
fig. 6 is a schematic structural diagram of another touch substrate according to the present invention;
fig. 7 is a schematic structural diagram of another touch substrate according to the present invention;
fig. 8 is a schematic structural diagram of another touch substrate according to 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 of F in FIG. 9;
FIG. 11 is yet another enlarged partial view of F in FIG. 9;
fig. 12 is a schematic view of another touch substrate structure according to the present invention;
Fig. 13 is a schematic structural diagram of another touch substrate according to the present invention;
fig. 14 is a schematic structural diagram of another touch substrate according to the present invention;
fig. 15 is a schematic structural diagram of another touch substrate according to the present invention;
fig. 16 is a schematic structural diagram of another touch substrate according to the present invention;
FIG. 17 is a schematic view of another touch substrate according to the present invention;
FIG. 18 is an enlarged view of a portion of I of FIG. 17;
FIG. 19 is an enlarged view of a portion of J of FIG. 18;
FIG. 20 is a cross-sectional view taken along line M-M' in FIG. 2;
fig. 21 is a schematic diagram of a touch display panel provided by the present invention;
fig. 22 is a schematic diagram of a touch display device provided by 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, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.
The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and apparatus should be considered part of the specification.
In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a touch substrate in the prior art. The touch substrate 100 provided in the prior art includes a touch area T and a non-touch area NT; the touch area T includes a touch electrode 01, and the touch electrode 01 includes a plurality of touch driving electrodes 011 and a plurality of touch sensing electrodes 012; the non-touch area NT comprises a touch signal lead 02 and a first protection lead 03; the touch signal lead 02 includes a touch driving lead 021 and a touch sensing lead 022, the touch driving lead 021 is connected with a touch driving electrode 011, the touch sensing lead 022 is connected with a touch sensing electrode 012, the first protection lead 03 is located between the touch driving lead 021 and the touch sensing lead 022, and the first end 031 of the first protection lead 03 is connected with the first fixed potential end 04 and the second end 032 of the first protection lead 03 is suspended. 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 achieve a narrow frame of the touch substrate 100, the range of the diameter (line width) setting of the first protection lead 03 is limited, and the electrostatic protection capability of the touch substrate 100 is not effectively improved. In addition, since the second end 032 of the first protection lead 03 is suspended in the air in the prior art, when the first protection lead 03 has an electrostatic discharge phenomenon, the touch electrode 012a corresponding to the second end 032 of the first protection lead 03 breaks down, resulting in a decrease in the touch capability of the touch substrate 100.
In order to solve the technical problems, the 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 by the present invention are described in detail below.
In this embodiment, please refer to fig. 2, fig. 2 is a schematic diagram of a touch substrate structure according to the present invention. The touch substrate 200 in this embodiment includes: a touch region Q and a non-touch region NQ; the touch area Q comprises a touch electrode P, and the touch electrode P comprises a plurality of touch driving electrodes P1 and a plurality of touch sensing electrodes P2; the non-touch area NQ comprises a touch signal lead L and a first protection lead GU1; 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 positioned between the touch driving lead L1 and the touch sensing lead L2; the first end a of the first protection lead GU1 is connected with the first end s1 of the electrostatic transmission structure 1, and the second end b of the first protection lead GU1 is connected with the first fixed potential end 2. The first protection lead GU1 can avoid coupling crosstalk between the touch sensing lead L2 and the touch driving lead L1, and improve touch reliability.
The touch signal lead L includes a touch driving lead L1 and a touch sensing lead L2, where the first protection lead GU1 is located between the touch driving lead L1 and the touch sensing lead L2, that is, the orthographic projection of the first protection lead GU1 on the plane where the substrate (not shown in the figure) of the touch substrate 200 is located between the orthographic projection of the touch driving lead L1 on the plane where the substrate of the touch substrate 200 is located and the orthographic projection of the touch sensing lead L2 on the plane where the substrate of the touch substrate 200 is located, so that signal interference between the touch driving lead L1 and the touch sensing lead L2 can be prevented, and touch reliability is improved.
Optionally, the touch substrate 200 further includes a connection bridge V, since the touch area Q includes a touch electrode P, 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 between 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, where only one of the touch driving electrodes P1 and the touch sensing electrodes P2 may be configured to 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 connection bridge V is generally disposed in a different layer from the touch driving electrode P1, but the present invention is not limited thereto and may be disposed according to an actual film layer.
It will be appreciated that during the manufacturing process of the touch substrate 200, static charge build-up in the substrate is typically generated due to certain external factors, such as continuous processing operations and handling or environmental changes. When static charges accumulate to a certain amount, discharge (ESD, electrostatic Discharge) will be generated, and the voltage of the static charges is far greater 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 will be damaged. In order to avoid the phenomenon that the touch substrate is damaged by electrostatic discharge, the touch substrate can be protected by setting the first protection lead GU1 to conduct and release electrostatic charge. Further, the first end a that this application set up first protection lead GU1 is connected with the first end s1 of static transmission structure 1, the second end b of first protection lead GU1 is connected with first fixed potential end 2, the both ends of first protection lead GU1 are connected with static transmission structure 1 and first fixed potential end 2 respectively promptly, wherein, first fixed potential end 2 can be the low potential end for static is transmitted between first fixed potential end 2, first protection lead GU1 and static transmission structure 1, because static transmission structure 1 need not to set up other functions such as touch, can make static export to static transmission structure 1 through first protection lead GU1, be about to static release on static transmission structure 1, reduce the possibility that each component is broken down by static on touch substrate 200, and then can be favorable to improving touch substrate 200's yields. And because this application only needs to set up the both ends that will first protection lead GU1 be connected with static 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 the narrow frame of touch substrate 200. In the present invention, the electrostatic transmission structure 1 may be located in the touch area Q or may be located in 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 specific positions of the electrostatic transmission structure 1 may be set according to actual situations, which will not be described herein. It will be appreciated that the voltage at the first fixed potential end is typically a lower voltage, for example, a ground voltage, or a lower voltage, to achieve better electrostatic conduction.
In some alternative embodiments, as further illustrated with reference to fig. 2 and 3, fig. 3 is a cross-sectional view taken along the direction N-N' in fig. 2. In the touch substrate 200 provided in this embodiment, the electrostatic transmission structure 1 and the touch electrode P are in the same layer.
It can be understood that the touch substrate 200 includes a substrate 00, a touch electrode P and an electrostatic transmission structure 1 formed on the substrate 00, wherein the electrostatic transmission structure 1 and the touch electrode P are in the same layer, the connection bridge V and the touch electrode P are in different layers, the connection bridge V and the touch driving electrode P1 and the touch sensing electrode P2 are in different layers, and the touch substrate further includes an insulating layer 10 between the connection bridge V and the touch sensing electrode P2 for insulating the connection bridge V and the touch sensing electrode P2, and the material of the insulating layer 10 is not specifically required, and may be an organic material or an inorganic material. Further, the electrostatic transmission structure 1 and the touch electrode P are layered in the touch substrate 200 provided in this embodiment, so that the thickness of the touch substrate 200 is prevented from being increased, which is beneficial to the light and thin touch substrate 200.
Optionally, the electrostatic transmission structure 1 and the touch electrode P are disposed in the same layer and the same 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 in the same layer and material, the touch electrode P may be formed of ITO (Indium Tin Oxide) or other transparent conductive material, and since the touch electrode P is formed of a transparent conductive material, the light transmittance of the touch substrate 200 may be prevented from being reduced. Further, the electrostatic transfer structure 1 may also be formed of ITO (Indium Tin Oxide) or other transparent conductive materials. When the electrostatic transmission structure 1 is disposed in the touch area 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 other conductive materials, and the material of the electrostatic transmission structure 1 is not specifically required in the present invention, and may be disposed according to the actual situation, which will not be described in detail below.
In some alternative embodiments, as shown in fig. 2, in the touch substrate 200 provided in this embodiment, the electrostatic transmission structure 1 is located in the touch area 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.
It can be understood that, in general, the transmission of the touch driving signal is realized between two adjacent touch driving electrodes P1 through a connection bridge, and similarly, the transmission of the touch sensing signal is also realized between two adjacent touch sensing electrodes P2 through a connection structure, and the connection bridge generates a resistance mutation region due to the change of the pattern or the change of the material, so that static electricity is easy to release the impact touch electrode, thereby causing the touch performance failure of the touch substrate. According to the touch control circuit, the static transmission structure 1 is arranged between the touch control driving electrode P1 and the touch control sensing electrode P2, namely, the static transmission structure 1 is equivalent to the fact that the touch control driving electrode P1 and the touch control sensing electrode P2 are spaced apart, static between the touch control driving electrode P1 and the touch control sensing electrode P2 can be captured, the static is led out to the static transmission structure 1 connected with the first fixed potential end 2, static is prevented from accumulating and breaking down the touch control driving electrode P1 and/or the touch control sensing electrode P2 inside the touch control substrate 200, and accuracy of signals inside the touch control substrate 200 and yield of the touch control substrate 200 are guaranteed. In this embodiment, since the electrostatic transmission structure 1 is located in the touch area Q, the electrostatic transmission structure 1 may also be formed of ITO or other transparent conductive material. The electrostatic transmission structure 1 is prevented from affecting the light transmittance of the touch substrate 200, and the frame width can be saved.
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, which does not specifically require 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 away from the first protection lead GU1 is located inside the touch region Q (excluding the transition region position where the touch region Q contacts with the non-touch region NQ of the touch region Q), so long as the electrostatic transmission structure 1 is led out, the electrostatic accumulation inside the touch substrate 200 is avoided, and the risk of electrostatic breakdown of each element on the touch substrate 200 can be reduced.
In some alternative embodiments, as shown in fig. 4, fig. 4 is a schematic structural diagram of another touch substrate according to the present invention. In the touch substrate 200 of the present embodiment, along the first direction X, the electrostatic transmission structure 1 penetrates the touch area Q.
It can be understood that, in the present embodiment, along the first direction X, the static electricity transmission structure 1 penetrates through the touch area Q, which is equivalent to that the static electricity transmission structure 1 completely separates the touch driving electrode P1 from 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 static electricity transmission structure 1, and static electricity is prevented from accumulating inside the touch substrate 200 to breakdown the touch driving electrode P1 and/or the touch sensing electrode P2, thereby ensuring touch accuracy of the touch substrate 200 and yield of the touch substrate 200.
In some alternative embodiments, as shown in fig. 5, fig. 5 is a schematic structural diagram of another touch substrate according to the present invention. In the touch substrate 200 of the present embodiment, the non-touch area NQ further includes a second protection lead GU2, an orthographic projection of the second protection lead GU2 on a plane of the touch substrate 200 is spaced from an orthographic projection of the first protection lead GU1 on the plane of the touch substrate 200, and the second protection lead GU2 is connected to the second fixed potential end 3.
The orthographic projection of the second protective lead GU2 on the plane of the touch substrate 200 and the orthographic projection of the first protective lead GU1 on the plane of the touch substrate 200 are spaced, and the orthographic projection of the touch driving lead L1 and/or the touch sensing lead L2 on the plane of the touch substrate 200 is further located within the orthographic projection of the second protective lead GU2 on the plane of the touch substrate 200 and the orthographic projection of the first protective lead GU1 on the plane of the touch substrate 200, i.e. the second protective lead GU2 is arranged at the outermost edge position of the circuit of the touch substrate 200, so that the second protective lead GU2 can also be used for guiding out static electricity generated in a non-touch area of the touch substrate 200 due to encapsulation or other reasons, thereby further avoiding static impact injury of the touch substrate 200 and improving the yield of the touch substrate 200.
It can be understood that when the touch substrate 200 is used later, after the touch area Q is touched, a corresponding signal is generated to perform touch detection, however, the touch area Q may possibly have static electricity due to a finger of a human body or other touch media, and the non-touch area NQ further includes a second protection lead GU2, and the second protection lead GU2 can lead out a large amount of static electricity to prevent the touch substrate 200 from being damaged by static electricity to cause touch failure.
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 discontinuities. Compared with the second protective lead GU2 shown in fig. 5, the second protective lead GU2 shown in fig. 6 can more effectively conduct 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, because the orthographic projection of the second protective lead GU2 on the plane of the touch substrate 200 is spaced from the orthographic projection of the first protective lead GU1 on the plane of the touch substrate 200, that is, the orthographic projection of the second protective lead GU2 on the plane of the touch substrate 200 is spaced from the orthographic projection of the touch electrode P on the plane of the touch substrate 200, that is, when the breakdown problem of static electricity occurs at the intermittent position of the second protective lead GU2, the touch electrode P is not affected, and thus the touch capability of the touch substrate 200 can be ensured. The specific structural design of the second protection lead GU2 is not limited, and can be set according to actual conditions, and will not be described in detail.
In some alternative embodiments, as shown in fig. 7, fig. 7 is a schematic structural diagram of another touch substrate according to the present invention. The touch substrate 200 provided in this embodiment: the second guard lead GU2 is connected to the second end s2 of the electrostatic transfer structure 1.
It will be appreciated that the first end s1 of the electrostatic delivery structure 1 is connected to the first end a of the first guard lead GU1, and the second end b of the first guard lead GU1 is connected to the first fixed potential end 2, and the second end s2 of the electrostatic delivery structure 1 is connected to the second guard lead GU2, and the second guard lead GU2 is connected to the second fixed potential end 3. The electrostatic transmission structure 1 forms a loop through the first protection lead GU1 and the second protection lead GU2, and changes the electrostatic path, so that static electricity is released in the loop, static electricity in the touch substrate 200 is effectively led out, the touch substrate 200 is further prevented from being damaged by the static electricity, and the yield of the touch substrate 200 is improved.
In some alternative embodiments, as shown in fig. 8, fig. 8 is a schematic structural diagram of another touch substrate according to 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 may be disposed on the same layer as the touch electrode P in the touch area Q, so that the electrostatic transmission structure 1 and the touch electrode P are formed in the same process, which is favorable for the manufacturing process of the touch substrate 200, and the electrostatic transmission structure 1 may be made of transparent conductive material or other conductive materials.
It can be understood that the electrostatic transmission structure 1 is disposed in the non-touch area NQ, the first end a of the first protection lead GU1 is further disposed and connected with the first end s1 of the electrostatic transmission structure 1, the second end b of the first protection lead GU1 is connected with the first fixed potential end 2, that is, two ends of the first protection lead GU1 are respectively connected with the electrostatic transmission structure 1 and the first fixed potential end 2, and the electrostatic transmission structure 1 does not need to be provided with other functions such as touch, so that the static electricity in the non-touch area NQ is led out to the electrostatic transmission structure 1 through the static electricity on the first protection lead GU1, that is, the static electricity is discharged on the electrostatic transmission structure 1, the static electricity is prevented from being discharged through the top end of the first protection lead GU1, which is suspended, and the touch electrode near the touch electrode is damaged, thereby reducing the possibility that each element on the touch substrate 200 is broken down by the static electricity, and further being beneficial to improving the yield of the touch substrate 200. And because this application only needs to set up the both ends that will first protection lead GU1 be connected with static 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 the narrow frame of touch substrate 200. In addition, since the touch signal leads reflect light (such as 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 different, so that the touch substrate is not uniformly reflected, the electrostatic transmission structure 1 can be a block structure, and as many touch signal leads as possible are covered in the direction perpendicular to the touch substrate 200, the reflection uniformity of the touch substrate can be improved, and the influence on visual perception due to large reflection difference caused by overlarge density differences of the touch signal lines in different positions is avoided.
In some alternative embodiments, as shown in connection with fig. 8-10, fig. 9 is a partial enlargement of R in fig. 8, and fig. 10 is a partial enlargement 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 vias 4.
The number of the through holes 4 and the diameter of the through holes are not specifically required, and the electrostatic transmission structure 1 and the second protection lead GU2 are only schematically shown in fig. 10 to be connected through the through holes 4, and the diameters of the through holes 4 are equal.
It can be understood that the present embodiment does not limit whether the electrostatic transmission structure 1 and the second protection lead GU2 are arranged on the same layer, and when the second protection lead electrostatic transmission structure 1 and the second protection lead GU2 are different in layer, the electrostatic transmission structure 1 and the second protection lead GU2 are connected through the plurality of via holes 4. On the one hand, both ends of the second protection lead GU2 are respectively connected with the electrostatic transmission structure 1 and the second fixed potential end 3. The second protection lead GU2 can conduct out a large amount of static electricity to prevent the touch substrate 200 from being damaged by static electricity. On the other hand, the electrostatic transmission structure 1 is connected with the second protection lead GU2 through the plurality of through holes 4, which is equivalent to forming a parallel structure, so that the connection impedance between the second protection lead GU2 and the electrostatic transmission structure 1 is reduced, the static electricity can be better released at the second protection lead GU2, the static electricity releasing capacity of the touch substrate 200 can be improved, and the process stability is also facilitated by the connection mode of the plurality of through holes.
With continued reference to fig. 8 to 10, in the touch substrate 200 provided in this embodiment, the electrostatic transmission structure 1 and the first protection lead GU1 are also connected through the plurality of vias 4.
It can be understood that the present embodiment does not limit whether the electrostatic transmission structure 1 and the first protection lead GU1 are arranged on the same layer, and when the second protection lead electrostatic transmission structure 1 and the first protection lead GU1 are different in layer, the electrostatic transmission structure 1 and the first protection lead GU1 are connected through the plurality of via holes 4. On the one hand, the two ends of the first protection lead GU1 are respectively connected with the electrostatic transmission structure 1 and the first fixed potential end 2, so that 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 broken down by static electricity is reduced, and further, the yield of the touch substrate 200 can be improved. On the other hand, the electrostatic transmission structure 1 is connected with the first protection lead GU1 through the plurality of through holes 4, which is equivalent to that the electrostatic transmission structure 1 is connected with the first protection lead GU1 in parallel, so that the impedance of the first protection lead GU1 is reduced, static electricity can be better released at the first protection lead GU1, and the electrostatic releasing capability of the touch substrate 200 can be improved.
In some alternative embodiments, as further illustrated in connection with fig. 8, 9 and 11, fig. 11 is yet another partial enlargement of F in fig. 9. The electrostatic transmission structure 1 in the touch substrate 200 provided in this embodiment is electrically connected to the second protection lead GU2 through a via; the line width of the first protective lead GU1 along the first direction X is H 1 The line width of the second protective lead GU2 is H 2 The maximum length of the via hole is H 3 Wherein H is 1 ≥H 3 ≥1/2H 1 Or H 2 ≥H 3 ≥1/2H 2 。
It will be appreciated that, as shown in connection with fig. 11, the present embodiment defines that the electrostatic transmission structure 1 is electrically connected to the second guard lead GU2 through a via; the line width of the first protective lead GU1 along the first direction X is H 1 Second guardThe line width of the lead GU2 is H 2 The maximum length of the via hole is H 3 Wherein H is 1 ≥H 3 ≥1/2H 1 Or H 2 ≥H 3 ≥1/2H 2 . The difference between the touch substrate shown in fig. 11 and the touch substrate shown in fig. 10 is that the electrostatic transmission structure 1 in the touch substrate shown in fig. 11 is electrically connected with the second protection lead GU2 through a via hole, and the maximum length of the via hole is longer, that is, the contact area of the electrostatic transmission structure 1 and the electrical connection of the second protection lead GU2 is larger than that of the electrostatic transmission structure 1 and the electrical connection of the second protection lead GU2 shown in fig. 10, which is more beneficial to guiding out a large amount of electrostatic current, preventing the touch substrate 200 from being damaged by static electricity, and reducing the impedance of the second protection lead GU2 more effectively, so that static electricity can be released better at the second protection lead GU2, and the static electricity releasing capability of the touch substrate 200 is improved.
Optionally, with continued reference to 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 of the electrostatic transmission structure 1 electrically connected to the first protection lead GU1 is larger than the contact area of the electrostatic transmission structure 1 electrically connected to the first protection lead GU1 shown in fig. 10, which is more beneficial to guiding out a large amount of electrostatic current, preventing the touch substrate 200 from being damaged by static electricity, and reducing the impedance of the first protection lead GU1 more effectively, so that static electricity can be released better at the first protection lead GU1, and improving the electrostatic discharge capability of the touch substrate 200.
Optionally, the electrostatic transmission structure 1 in the touch substrate is electrically connected to the first protection lead GU1 through one or more vias, and/or the electrostatic transmission structure 1 is electrically connected to the second protection lead GU2 through one or more vias, where a via refers to a maximum length H of the via shown in fig. 11 3 Wherein H is 1 ≥H 3 ≥1/2H 1 Or H 2 ≥H 3 ≥1/2H 2 . The invention does not limit how the first protection lead GU1 and the second protection lead GU2 are connected with the electrostatic transmission structure 1, and can be set according to actual conditions, and the invention is not repeated below 。
In some alternative embodiments, as shown in fig. 12 and fig. 13 in combination, fig. 12 is a schematic structural view of another touch substrate provided by the present invention, and fig. 13 is a schematic structural view of another touch substrate provided by the present invention. The touch substrate 200 provided in this embodiment: the touch area Q further includes a first virtual electrode P0, where 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; 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 one or more first virtual electrodes P0, fig. 12 only illustrates that the touch area Q includes one first virtual electrode P0, fig. 13 only illustrates that the touch area Q includes a plurality of first virtual electrodes P0, and the number of the first virtual electrodes P0 and the corresponding positions thereof are not specifically required, and may be set according to the electrostatic situation in the actual touch substrate 200, which will not be 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 interval between the touch driving electrode P1 and the touch sensing electrode P2 by using the first virtual electrode P0 is equivalent to that the static electricity between the touch driving electrode P1 and the touch sensing electrode P2 is led out to the first virtual electrode P0, so that the static electricity is prevented from accumulating inside the touch substrate 200 to break down 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. In this embodiment, since the first dummy electrode P0 is located in the touch area Q, the first dummy electrode P0 may also be formed of ITO or other transparent conductive material. The electrostatic transmission structure 1 is prevented from affecting the light transmittance of the touch substrate 200.
In some alternative embodiments, as shown in fig. 14, fig. 14 is a schematic structural diagram of another touch substrate according to 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 is 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 virtual electrode P0 and the second protection leads GU2 opposite to the two 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 the static electricity, and the yield of the touch substrate 200 is improved. In fig. 14, only one loop formed by the first virtual electrode P0 and the second protective lead GU2 is taken as an example, and the present invention is not limited thereto, and may be set according to practical situations, and will not be described herein.
In some alternative embodiments, as shown in fig. 15, fig. 15 is a schematic structural diagram of another touch substrate according to the present invention. The touch substrate 200 provided in this embodiment: the second protective lead GU2 at least partially surrounds the touch area Q; the non-touch area NQ further includes a ground signal line GND on a side of the second protection lead GU2 away from the touch area Q, where 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 on a side of the second protection 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. Namely, the arrangement of the second protection lead GU2 and the ground signal terminal 5 at the edge of the non-touch area NQ of the touch substrate 200 is equivalent, and the electrostatic discharge capability of the touch substrate 200 can be more effectively improved than the arrangement of the second protection lead GU 2. The ground signal line GND is disposed at the outermost edge of the circuit of the touch substrate 200, so the ground signal line GND may also be used to guide out static electricity generated by packaging the touch substrate 200 to the ground signal terminal 5, 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, which can be understood that the second guard lead GU2 and the ground signal line GND may be designed in a segmented manner, as shown in fig. 15, in conjunction with fig. 15, only the second guard lead GU2 is arranged in two segments, and the ground signal line GND is arranged as a whole, which is not limited to this, and may be arranged according to practical situations, and will not be described herein.
In some alternative embodiments, as shown in fig. 16 and fig. 17 to 19, fig. 16 is a schematic structural view of another touch substrate provided by the present invention, fig. 17 is a schematic structural view of another touch substrate provided by the present invention, fig. 18 is a partial enlarged view of I in fig. 17, and fig. 19 is a partial 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, as shown in fig. 16, the electrostatic transmission structure 1 is located in the touch area 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, the electrostatic transmission structure 1 is further limited to be connected with the ground signal line GND and the second protection lead GU2, and the electrostatic transmission structure 1 is utilized to guide out the static electricity between the touch driving electrode P1 and the touch sensing electrode P2 to the ground signal end 5, and the static electricity can be guided out to the ground signal end 5 through the ground signal line GND, so that the static electricity is prevented from accumulating inside the touch substrate 200 to break down 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. As shown in fig. 17 to 19, the electrostatic transmission structure 1 is located in the non-touch area 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 transfer structure 1 may be connected to the second guard lead GU2 and the ground signal line GND through the via hole 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 in 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 components on the touch substrate 200 are broken down by static electricity is reduced, and further, the yield of the touch substrate 200 can be improved. 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 that the electrostatic transmission structure 1 is connected with the second protection lead GU2 in parallel, and the electrostatic transmission structure 1 is connected with the ground signal line GND in parallel, which is favorable for reducing the impedance of the first protection lead GU1, and the electrostatic can be better released at the first protection lead GU1, so that the electrostatic releasing capability of the touch substrate 200 can be improved.
In some alternative embodiments, as shown in connection with fig. 2 and 20, fig. 20 is a cross-sectional view taken along line M-M' in 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 on the same layer, and the first protection lead GU1 and the touch electrode P are on different layers.
It can be understood that, in order to intuitively describe the relationship among the touch lead L, the first protection lead GU1 and the touch electrode P, only the touch lead L, the first protection lead GU1 and the touch electrode P are illustrated in fig. 20, other structures are not illustrated, and fig. 12 only uses the touch sensing lead L2 and the first protection lead GU1 as an example. The touch lead L and the first protection lead GU1 are 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. And the first protection lead GU1 and the touch electrode P are different in layer, so that the distance between the first protection lead GU1 and the touch electrode P can be further increased, the influence of static electricity released by the first protection lead GU1 on the touch electrode P is avoided, and the yield of the touch substrate 200 is improved.
The invention further provides a touch display panel 300, which includes the touch substrate 200 according to any of the above embodiments of the invention. The touch substrate 200 of the present invention may be a touch substrate manufactured independently, or may be a touch substrate manufactured by using a film structure in a display panel as a base (e.g., a packaging layer, TFE), and thus the thickness of the touch display panel may be significantly reduced. Fig. 21 is a schematic diagram of a touch display panel according to the present invention, and, with reference to fig. 21, the touch display panel 30 includes a touch substrate 200 according to any of the above embodiments of the present invention. In the embodiment of fig. 21, only a mobile phone is taken as an example to describe the touch display panel 300, it is to be understood that the touch display panel 300 provided in the embodiment of the invention may be a display device with a display function, such as a computer, a television, a vehicle-mounted display device, etc., which is not particularly limited in the invention. The touch display panel 300 provided by the embodiment of the present invention has the beneficial effects of the touch substrate 200 provided by the embodiment of the present invention, and the detailed description of the touch substrate 200 is specifically referred to in the above embodiments, and the detailed description of the embodiment is omitted herein.
The invention also provides a touch display device 400, which includes the touch display panel 300 according to any of the above embodiments. Fig. 22 is a schematic diagram of a touch display device according to the present invention, and, with reference to fig. 22, a touch display device 400 includes a touch display panel 300 according to any of the above embodiments of the present invention. In the embodiment of fig. 22, only a mobile phone is taken as an example to describe the touch display device 400, it is to be understood that the touch display device 400 provided in the embodiment of the invention may be a computer, a television, a vehicle-mounted display device or other display devices with display functions, which is not particularly limited in the invention. 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 the detailed description of the touch display panel 300 in the above embodiments is specifically referred to, and the detailed description of the embodiment is omitted herein.
As can be seen from the above embodiments, the touch substrate, the touch display panel and the touch display device provided by 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 a touch electrode, and the touch electrode comprises 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 a touch driving electrode, the touch sensing lead is connected with a 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 static generated in a non-touch area can be led out through the static transmission structure due to the fact that the static transmission structure does not have other functions such as touch, the occurrence of static breakdown of other touch electrode phenomena is prevented, and the yield of the touch substrate is improved.
While certain specific embodiments of the invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the 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 (15)
1. A touch substrate, comprising:
a touch region and a non-touch region;
the touch area comprises a touch electrode, and the touch electrode comprises 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 electrostatic transmission structure, and the second end of the first protection lead is connected with the first fixed potential end;
The electrostatic transmission structure is positioned in the touch area, and the orthographic projection of the electrostatic transmission structure on the plane of the touch substrate is positioned between the orthographic projection of the touch driving electrode on the plane of the touch substrate and the orthographic projection of the touch sensing electrode on the plane of the touch substrate.
2. The touch substrate of claim 1, wherein the electrostatic transfer structure is co-layered with the touch electrode.
3. The touch substrate of claim 2, wherein the electrostatic transfer structure extends through the touch region along a first direction.
4. The touch substrate according to claim 1, wherein the non-touch region further comprises a second protection lead, a front projection of the second protection lead on a plane of the touch substrate is spaced from a front projection of the first protection lead on the plane of the touch substrate, the second protection lead is connected with a second fixed potential end, and a voltage of the second fixed potential end is less than or equal to a ground voltage.
5. The touch substrate of claim 4, wherein the second guard lead is connected to the second end of the electrostatic transfer structure.
6. The touch substrate of claim 5, wherein the electrostatic transfer structure is located in the non-touch region.
7. The touch substrate of claim 5, wherein the electrostatic transfer structure is connected to the second guard lead through a plurality of vias.
8. The touch substrate of claim 5, wherein the electrostatic transfer structure is electrically connected to the second guard lead through a via;
the linewidth of the first protective lead is H along the first direction 1 The linewidth of the second protective lead is H 2 The maximum length of the via hole is H 3 Wherein H is 1 ≥H 3 ≥1/2H 1， Or H 2 ≥H 3 ≥1/2H 2 。
9. The touch substrate of claim 4, wherein the touch region further comprises a first virtual electrode, the orthographic projection of the first virtual electrode on the plane of the touch substrate is located between the orthographic projection of the touch driving electrode on the plane of the touch substrate and the orthographic 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.
10. The touch substrate of claim 9, wherein the second end of the first dummy electrode is connected to the second guard lead.
11. The touch substrate of claim 4, wherein the second guard lead at least partially surrounds the touch region;
the non-touch area further comprises a grounding signal line which is positioned on one side, far away from the touch area, of the second protection lead, the grounding signal line is connected with a grounding signal end, and the grounding signal line at least partially surrounds the touch area.
12. The touch substrate of claim 11, wherein the ground signal line is connected to the second end of the electrostatic transfer structure, and the second guard lead is connected to the electrostatic transfer structure.
13. The touch substrate of claim 1, wherein the touch signal lead is co-layered with the first guard lead and the first guard lead is different from the touch electrode.
14. A touch display panel comprising the touch substrate of any one of claims 1-13.
15. A touch display device comprising the touch display panel of claim 14.
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