CN111538439A - Touch substrate and display device - Google Patents
Touch substrate and display device Download PDFInfo
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- CN111538439A CN111538439A CN202010327911.0A CN202010327911A CN111538439A CN 111538439 A CN111538439 A CN 111538439A CN 202010327911 A CN202010327911 A CN 202010327911A CN 111538439 A CN111538439 A CN 111538439A
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- touch
- substrate
- electrodes
- conductive layer
- touch electrode
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
Abstract
The invention provides a touch substrate and a display device. The touch substrate includes: a substrate; a touch electrode layer disposed on one side of the substrate; and the conductive layer is arranged on the surface of the touch electrode layer, which is far away from the substrate. According to the touch substrate provided by the invention, the upper surface of the touch electrode layer is further pasted with the conductive layer, so that the flat conductive layer can connect the touch electrode layers formed by stacking materials such as nano silver wires at the lap joint part, the narrow frame design of the touch substrate is facilitated, and the touch effective area of the touch substrate is larger.
Description
Technical Field
The invention relates to the technical field of touch panels, in particular to a touch substrate and a display device.
Background
The nano silver wire (SNW) uses a very fine silver wire as a medium, and is different from the conventional metal mesh or Indium Tin Oxide (ITO) solution in that the nano silver wire is a stacked mesh-shaped conductive surface, can be bent at will and can bear tensile deformation in various dimensional directions, and has good bending performance. Therefore, the excellent bending property enables the nano silver wire to fully exert the advantages of the flexible screen, and is the development direction in the future. And the diameter of the nano silver wire is extremely small, and meanwhile, the transmittance is high, so that the shadow eliminating risk existing in the traditional scheme is avoided.
Disclosure of Invention
The present invention has been completed based on the following findings of the inventors:
in the course of research, the inventors of the present invention found that, although the use of the silver nanowires as the touch electrodes has many of the above advantages, the silver nanowires are not suitable for narrow bezel design and thus limit the large-scale application thereof. Therefore, the inventor further pastes the conducting layer on the touch electrode, so that the conducting film made of conducting materials such as ITO can connect disordered silver wire ends at the lap joint and then lap-joint the silver wire ends with the signal line, and therefore the lap joint width is reduced to be less than 0.06mm, the narrow frame design of the touch substrate is facilitated, the impedance of the lap joint is reduced, and the touch is sensitive.
In a first aspect of the present invention, a touch substrate is provided.
According to an embodiment of the present invention, the touch substrate includes: a substrate; the touch electrode layer is arranged on one side of the substrate; the conducting layer is arranged on the surface, far away from the substrate, of the touch electrode layer.
According to the touch substrate provided by the embodiment of the invention, the upper surface of the touch electrode layer is further coated with the conductive layer, so that the flat conductive layer can connect the touch electrode layers formed by stacking materials such as nano silver wires at the lap joint, the narrow frame design of the touch substrate is facilitated, and the touch effective area of the touch substrate is larger.
In addition, the touch substrate according to the above embodiment of the invention may further have the following additional technical features:
according to an embodiment of the present invention, the touch electrode layer is formed of a nano silver wire, and the conductive layer is formed of indium tin oxide.
According to an embodiment of the present invention, the touch substrate further includes: and the lapping blocks are simultaneously contacted with the side surface of the touch electrode layer and the side surface of the conductive layer.
According to the embodiment of the invention, the width of the surface of the lapping block far away from the substrate is not more than 60 micrometers.
According to the embodiment of the invention, the orthographic projection of the conductive layer on the substrate is completely overlapped with the orthographic projection of the touch electrode layer on the substrate.
According to an embodiment of the present invention, the touch electrode layer includes: the touch panel comprises a plurality of first touch electrodes and a plurality of second touch electrodes, wherein the first touch electrodes and the second touch electrodes are arranged in a crossed mode, each first touch electrode comprises a plurality of first sub-electrodes and a plurality of first bridge electrodes, two adjacent first sub-electrodes are respectively and electrically connected with two ends of one first bridge electrode, each second touch electrode comprises a plurality of second sub-electrodes and a plurality of second bridge electrodes, two adjacent second sub-electrodes are respectively and electrically connected with two ends of one second bridge electrode, and the first bridge electrodes and the second bridge electrodes are also arranged in a crossed mode.
According to the embodiment of the present invention, an orthogonal projection of the plurality of first sub-electrodes and the plurality of second sub-electrodes on the substrate completely coincides with an orthogonal projection of the conductive layer on the substrate.
According to the embodiment of the invention, the thickness of the touch electrode layer is 10-100 micrometers.
According to the embodiment of the invention, the thickness of the conductive layer is 1-10 micrometers.
In a second aspect of the invention, a display device is presented.
According to an embodiment of the invention, the display device comprises the touch substrate.
According to the display device provided by the embodiment of the invention, the touch substrate is in accordance with the narrow frame design, and the touch effective area is larger, so that the narrow frame effect of the display device is better, and the touch performance is better. Those skilled in the art will appreciate that the features and advantages described above with respect to the touch substrate are still applicable to the display device and will not be described herein.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing aspects of the invention are explained in the description of the embodiments with reference to the following drawings, in which:
fig. 1 is a schematic cross-sectional structure diagram of a touch substrate according to an embodiment of the invention;
fig. 2 is a schematic cross-sectional structure view of a touch substrate according to another embodiment of the invention;
FIG. 3 is a photomicrograph of a disordered strand of silver nanowires;
FIG. 4 is a schematic diagram comparing the lap widths of a prior art (a) and another embodiment (b) of the present invention;
FIG. 5 is a schematic diagram of a process for manufacturing a touch electrode layer and a conductive layer according to an embodiment of the invention;
FIG. 6 is a schematic diagram of a top view structure of a touch electrode layer according to an embodiment of the invention;
fig. 7 is a schematic view of a partially enlarged structure of a touch substrate according to an embodiment of the invention.
Reference numerals
100 substrate
200 touch electrode layer
201 touch electrode material layer
202 sub-electrode
210 first touch electrode
211 first sub-electrode
212 first bridge electrode
220 second touch electrode
221 second sub-electrode
222 second bridge electrode
300 conductive layer
301 layer of conductive material
400 lap joint block
500 signal line
600 touch integrated circuit
Detailed Description
The following examples of the present invention are described in detail, and it will be understood by those skilled in the art that the following examples are intended to illustrate the present invention, but should not be construed as limiting the present invention. Unless otherwise indicated, specific techniques or conditions are not explicitly described in the following examples, and those skilled in the art may follow techniques or conditions commonly employed in the art or in accordance with the product specifications.
In one aspect of the present invention, a touch substrate is provided.
According to an embodiment of the present invention, referring to fig. 1, a touch substrate includes a substrate 100, a touch electrode layer 200, and a conductive layer 300; the touch electrode layer 200 is disposed on one side of the substrate 100; the conductive layer 300 is disposed on a surface of the touch electrode layer away from the substrate 100. Thus, the conductive layer 300 is attached to the upper surface of the touch electrode layer 200, which can increase the lap joint property at the edge of the touch electrode layer 200, thereby facilitating the narrow frame design of the touch substrate, and increasing the touch active area sa (sensoractive) of the touch substrate. It should be noted that the touch electrode layer 200 and the conductive layer 300 in fig. 1, fig. 2, and fig. 4 are only an example of a whole layer structure, and specifically, the touch electrode layer 200 and the conductive layer 300 may also be patterned.
In some embodiments of the present invention, the touch electrode layer 200 may be formed of nano silver wires (SNW), and the conductive layer 300 may be formed of Indium Tin Oxide (ITO), so that the ITO has good conductivity and transparency, and covers the upper surface of the SNW as a transparent conductive film, which not only can connect the silver wires in the same pattern together, but also can increase the lap joint property at the edges of the touch electrode pattern, thereby being more beneficial to the narrow frame design of the touch substrate.
In some embodiments of the present invention, referring to fig. 2, the touch substrate may further include a bonding block 400, and the bonding block 400 contacts both the side surface of the touch electrode layer 200 and the side surface of the conductive layer 300, so that the conductive layer 300 can connect disordered silver wire ends together at a bonding position and then bond with the bonding block 400, thereby facilitating the reduction of the bonding width on the touch substrate.
The inventor of the present invention found that, referring to fig. 3, since the nano silver wires are disordered, the wire ends of the nano silver wires may not be located at the edge of the touch electrode pattern (pattern). Therefore, in order to connect enough nano-silver wires to the signal lines (Trace lines), the bonding width d1 at the junction of the two lines needs to be as wide as possible, typically 400-600 μm as shown in fig. 4 (a), but this dimension is not compatible with the narrow frame design of the OLED.
In view of the above problem, referring to fig. 4 (b), the inventor adds a conductive layer 100 on a touch electrode layer 200, silver lines in the same pattern are connected together through ITO, and the whole plane of ITO is conductive, and ITO can also connect disordered silver line ends at the lap joint and lap-joint with Trace lines through a lap joint block 400, so that the lap joint width d2 of the lap joint block can be reduced to below 60 micrometers.
In some embodiments of the present invention, an orthographic projection of the conductive layer 300 on the substrate 100 and an orthographic projection of the touch electrode layer 200 on the substrate 100 may be completely overlapped, so that the size and the shape of the conductive layer 300 and the touch electrode layer 200 are the same, and thus, referring to fig. 5, in a process of manufacturing the touch substrate, the entire touch electrode material layer 201 and the entire conductive material layer 301 may be formed first, and then the conductive layer 300 and the touch electrode layer 200 having the same pattern are formed by one etching process, so that the process steps and the manufacturing cost of the touch substrate may not be significantly increased.
According to an embodiment of the present invention, referring to fig. 6, the touch electrode layer may include a plurality of first touch electrodes 210 and a plurality of second touch electrodes 220; the first touch electrode 210 and the second touch electrode 220 are arranged in a crossing manner; each of the first touch electrodes 210 may include a plurality of first sub-electrodes 211 and a plurality of first bridge electrodes 212, and each of the second touch electrodes 220 may include a plurality of second sub-electrodes 221 and a plurality of second bridge electrodes 222; referring to fig. 7, two adjacent first sub-electrodes 211 are electrically connected to two ends of one first bridge electrode 212, two adjacent second sub-electrodes 221 are electrically connected to two ends of one second bridge electrode 222, and the first bridge electrode 212 and the second bridge electrode 222 are also arranged to intersect. In this way, the first touch electrodes 210 arranged in the vertical direction are used as transmitting electrodes (Tx), the second touch electrodes 220 arranged in the horizontal direction are used as receiving electrodes (Rx), and the transmitting signals from the touch integrated circuit (T-IC)600 are transmitted to the first sub-electrodes 211 through the signal lines 500, and then the receiving signals from the second sub-electrodes 221 are transmitted back to the touch integrated circuit 600 through the signal lines 500, so as to implement the touch function.
In other embodiments of the present invention, an orthogonal projection of the plurality of first sub-electrodes 211 and the plurality of second sub-electrodes 221 on the substrate may completely coincide with an orthogonal projection of the conductive layer 300 on the substrate 100. Thus, referring to fig. 7, in the process of manufacturing the touch substrate, a plurality of sub-electrodes (including the first sub-electrode 211 and the second sub-electrode 221) and the conductive layer 300 with the same size and shape may be etched at the same time, so that the conductive layer 300 may connect the silver wires in each sub-electrode together, and may avoid the problem of overlapping the adjacent first sub-electrode and the second sub-electrode.
According to the embodiment of the invention, the thickness of the touch electrode layer 200 can be 10-100 micrometers, and the thickness of the conductive layer 300 can be 1-10 micrometers, so that for the surface of the touch electrode formed by stacking the nano silver wires with the thickness of tens of micrometers, only the ITO with the thickness of several micrometers needs to be attached, and the total thickness of the touch substrate cannot be obviously increased.
In summary, according to the embodiments of the present invention, the present invention provides a touch substrate, wherein a conductive layer is further attached to an upper surface of a touch electrode layer, so that the flat conductive layer can connect the touch electrode layers formed by stacking nano silver wires and other materials at a lap joint, thereby facilitating a narrow frame design of the touch substrate, and the touch active area of the touch substrate is larger.
In another aspect of the invention, a display device is provided. According to an embodiment of the invention, the display device comprises the touch substrate.
According to the embodiment of the present invention, the specific type of the display device is not particularly limited, such as a display screen, a television, a mobile phone, a tablet computer, or a smart watch, and the like, and those skilled in the art can select the display device according to the actual use requirement of the display device, and details thereof are not repeated herein. It should be noted that the display device includes other necessary components and structures besides the touch substrate, taking an OLED display screen as an example, specifically, such as a display panel, a housing, a control circuit board or a power line, etc., and those skilled in the art can supplement the functions of the display device accordingly, which is not described herein again.
In summary, according to the embodiments of the present invention, the present invention provides a display device, in which the touch substrate conforms to a narrow frame design and the touch active area is larger, so that the narrow frame effect of the display device is better and the touch performance is better. Those skilled in the art will appreciate that the features and advantages described above with respect to the touch substrate are still applicable to the display device and will not be described herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A touch substrate, comprising:
a substrate;
the touch electrode layer is arranged on one side of the substrate;
the conducting layer is arranged on the surface, far away from the substrate, of the touch electrode layer.
2. The touch substrate of claim 1, wherein the touch electrode layer is formed of silver nanowires, and the conductive layer is formed of indium tin oxide.
3. The touch substrate of claim 2, further comprising:
and the lapping blocks are simultaneously contacted with the side surface of the touch electrode layer and the side surface of the conductive layer.
4. The touch substrate of claim 3, wherein the width of the surface of the bump away from the substrate is not greater than 60 μm.
5. The touch substrate of claim 1, wherein an orthographic projection of the conductive layer on the substrate and an orthographic projection of the touch electrode layer on the substrate are completely coincident.
6. The touch substrate of claim 1, wherein the touch electrode layer comprises:
the touch panel comprises a plurality of first touch electrodes and a plurality of second touch electrodes, wherein the first touch electrodes and the second touch electrodes are arranged in a crossed mode, each first touch electrode comprises a plurality of first sub-electrodes and a plurality of first bridge electrodes, two adjacent first sub-electrodes are respectively and electrically connected with two ends of one first bridge electrode, each second touch electrode comprises a plurality of second sub-electrodes and a plurality of second bridge electrodes, two adjacent second sub-electrodes are respectively and electrically connected with two ends of one second bridge electrode, and the first bridge electrodes and the second bridge electrodes are also arranged in a crossed mode.
7. The touch substrate of claim 6, wherein an orthogonal projection of the plurality of first sub-electrodes and the plurality of second sub-electrodes on the substrate completely coincides with an orthogonal projection of the conductive layer on the substrate.
8. The touch substrate of claim 2, wherein the touch electrode layer has a thickness of 10 to 100 μm.
9. The touch substrate of claim 1, wherein the conductive layer has a thickness of 1-10 μm.
10. A display device comprising the touch substrate according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010327911.0A CN111538439A (en) | 2020-04-23 | 2020-04-23 | Touch substrate and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010327911.0A CN111538439A (en) | 2020-04-23 | 2020-04-23 | Touch substrate and display device |
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| Publication Number | Publication Date |
|---|---|
| CN111538439A true CN111538439A (en) | 2020-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010327911.0A Pending CN111538439A (en) | 2020-04-23 | 2020-04-23 | Touch substrate and display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112817489A (en) * | 2021-03-08 | 2021-05-18 | 京东方科技集团股份有限公司 | Touch substrate and display device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105183246A (en) * | 2014-06-12 | 2015-12-23 | 宸鸿科技(厦门)有限公司 | Capacitive touch control panel |
| US20160139703A1 (en) * | 2014-11-19 | 2016-05-19 | T-Kingdom Co., Ltd. | Structure for touch electrode substrate and manufacturing method thereof |
| CN108710452A (en) * | 2018-04-27 | 2018-10-26 | 业成科技（成都）有限公司 | The touch control display apparatus of touch panel and the application touch panel |
-
2020
- 2020-04-23 CN CN202010327911.0A patent/CN111538439A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105183246A (en) * | 2014-06-12 | 2015-12-23 | 宸鸿科技(厦门)有限公司 | Capacitive touch control panel |
| US20160139703A1 (en) * | 2014-11-19 | 2016-05-19 | T-Kingdom Co., Ltd. | Structure for touch electrode substrate and manufacturing method thereof |
| CN108710452A (en) * | 2018-04-27 | 2018-10-26 | 业成科技（成都）有限公司 | The touch control display apparatus of touch panel and the application touch panel |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112817489A (en) * | 2021-03-08 | 2021-05-18 | 京东方科技集团股份有限公司 | Touch substrate and display device |
| CN112817489B (en) * | 2021-03-08 | 2024-03-15 | 京东方科技集团股份有限公司 | Touch substrate and display device |
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