CN111367427A - Metal grid structure, touch screen and touch display screen - Google Patents
Metal grid structure, touch screen and touch display screen Download PDFInfo
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- CN111367427A CN111367427A CN201911362411.4A CN201911362411A CN111367427A CN 111367427 A CN111367427 A CN 111367427A CN 201911362411 A CN201911362411 A CN 201911362411A CN 111367427 A CN111367427 A CN 111367427A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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Abstract
The invention relates to the technical field of touch control, and provides a metal grid structure, a touch screen and a touch display screen, wherein the metal grid structure comprises: the touch control device comprises a plurality of metal lines, wherein the metal lines are crossed to form metal grid lines, the metal grid lines are separated by one breaking line to form touch control electrode channels and Dummy blocks which are arranged at intervals, the touch control electrode channels are connected with driving equipment, and the Dummy blocks are not connected with the driving equipment and only have an optical matching effect. The touch electrode channel comprises an edge sub-touch electrode and an in-plane sub-touch electrode. The outer side part of the edge sub-touch electrode is covered by the BM, metal grid lines of the edge sub-touch electrode covered by the BM are designed more densely than metal grid lines of the in-plane sub-touch electrode, and the width of the edge sub-touch electrode is smaller than that of the in-plane sub-touch electrode. Due to the design effect of the metal grid lines, the edge sub-touch electrodes and the in-plane sub-touch electrodes can generate similar electrical properties in the aspects of resistance and capacitance, and the basic touch performance cannot be influenced.
Description
Technical Field
The invention relates to the technical field of touch control, in particular to the technical field of touch control display, and specifically relates to a metal grid structure, a touch control screen and a touch control display screen.
Background
Currently, the touch display technology industry has emphasized the design of product borders more and more, and strives to compress the borders (i.e., black borders) of touch screens to the greatest extent possible to obtain more market competitive products.
As shown in fig. 1, the current touch display screen includes a touch module 1 and a display module 2, which are bonded together by a bonding layer (not shown), the size of the touch module 1 is slightly larger than that of the display module 2, the edge of the touch module 1 is covered by a black shielding material 3(BM) (mainly shielding an edge metal lead 4), so that the touch module is divided into a display area and a non-display area, the non-display area is covered by the BM, and the display area is not covered by the BM. In actual production, part of the structure of the edge touch electrode 5 of the touch module is generally covered by the BM, so as to satisfy the touch sensing effect of the edge area of the touch screen. At this time, the narrow frame of the touch display screen is not facilitated to be realized.
In order to realize the narrow frame design of the touch screen, most of the touch screens are currently realized from the following two aspects: 1. reducing the line width or the line distance of the metal lead; 2. reducing or decreasing the display area size. However, metal leads are limited by the manufacturing process capability and are generally difficult to further optimize. The conventional OGS touch screen uses Indium Tin Oxide (ITO) to manufacture a touch electrode layer, and the resistivity of the Indium Tin Oxide (ITO) sheet resistor is usually several tens to several hundreds of ohms, so that the touch electrode layer has a large resistance and poor conductivity, and the reduction or decrease of the size of a display area is difficult to meet the requirements of the design of a touch drive IC, thereby increasing more difficulties for the design of the touch drive IC. The narrow frame design of the touch screen can only be realized by reducing the number of touch electrode channels of the touch screen, but the design reduces the basic touch performance of the product.
In order to solve the technical problem that the narrow frame and the touch performance cannot be met at the same time, how to consider the two performances at the same time becomes a subject to be overcome.
Disclosure of Invention
In view of the above-mentioned technical problems,
the technical scheme provided by the invention for solving the technical problem is as follows:
the invention provides a Metal-Mesh (Metal-Mesh) structure, and a touch screen and a touch display screen adopting the Metal-Mesh structure.
The metal grid technology can form a conductive metal grid pattern by using easily available and cheap substances such as metal materials such as silver, copper and the like or oxides and the like as raw materials, and the manufacturing process is simpler than that of a touch electrode layer made of Indium Tin Oxide (ITO), and the required temperature is not more than 150 ℃. The theoretical lowest resistance value can reach 0.1 ohm/square, and the electromagnetic interference shielding effect is good.
The metal mesh structure includes: the touch control device comprises a plurality of metal lines, wherein the metal lines are crossed to form metal grid lines, the metal grid lines are separated by one breaking line to form touch control electrode channels and Dummy blocks which are arranged at intervals, the touch control electrode channels are connected with driving equipment, and the Dummy blocks are not connected with the driving equipment and only have an optical matching effect. The touch electrode channel comprises an edge sub-touch electrode and an in-plane sub-touch electrode. The outer part of the edge sub-touch electrode is covered by BM, the metal grid lines covered by BM are designed more densely than the metal grid lines of the in-plane sub-touch electrode, and the width of the edge sub-touch electrode is smaller than that of the in-plane sub-touch electrode. Because the metal grid lines on the outer part of the edge sub-touch electrode are designed more densely than the metal grid lines of the in-plane sub-touch electrode, the edge sub-touch electrode and the in-plane sub-touch electrode can generate approximate electrical properties in the aspects of resistance and capacitance, and the basic touch performance cannot be influenced.
Meanwhile, the outer edge part of the edge sub-touch electrode is covered by the BM, the design density of the part, which is not covered by the BM, of the edge sub-touch electrode is consistent with that of the metal grid lines of the in-plane sub-touch electrode, and the metal grid lines of the edge sub-touch electrode and the metal grid lines of the in-plane sub-touch electrode have no visual difference basically. Meanwhile, the width of the edge sub-touch electrode is smaller than that of the in-plane sub-touch electrode, so that the width of the edge sub-touch electrode which needs to be shielded by the BM is reduced, and further, the non-display area and the narrow frame effect are reduced.
In a preferred embodiment, the edge sub-touch electrodes are provided with connecting lines at their outer edges, the connecting lines connect the outer edges of the metal lines of the edge sub-touch electrodes in sequence, and the connecting lines are located at the outer edges of the edge sub-touch electrodes and covered by the BM, so that the optical difference is also blocked by the BM.
In an optional scheme, the inner sides of the edge sub-touch electrodes may also be provided with connecting lines, and the connecting lines connect the inner sides of the metal wires of the edge sub-touch electrodes in sequence.
In an optional scheme, the metal grid structure of the present invention includes a breakpoint, and the breakpoint is designed on the Dummy block.
In other schemes, a breakpoint is also designed on the touch electrode channel, and the breakpoint is designed on the in-plane sub-touch electrode.
In an optimal technical scheme, the number of break points on the Dummy block is more than that of break points on the in-plane sub-touch electrode.
In other embodiments, the edge sub-touch electrode is also designed with a breakpoint.
In an optimal technical scheme, the number of the break points on the in-plane sub-touch electrode is more than that of the break points on the edge sub-touch electrode, so as to match the difference of the electrical properties of the metal grid lines of the in-plane sub-touch electrode and the edge sub-touch electrode.
The invention also provides a touch screen which comprises a substrate, wherein the substrate is provided with a first surface, the first surface is provided with a layer of metal grid structure, one side of the metal grid structure, which is far away from the first surface, is provided with an insulating layer, and the other side of the insulating layer, which is far away from the first surface, is provided with another layer of metal grid structure.
The invention provides a touch display screen which comprises the touch screen and a display screen, wherein a bonding layer is arranged on the display screen, and the touch screen is arranged on one side, far away from the display screen, of the bonding layer.
In other technical solutions, a non-display area of the touch display screen is further provided with a lead and a golden finger, and the lead and the golden finger are used for realizing connection between the touch electrode channel and the touch drive IC.
According to the metal grid structure and the touch screen adopting the metal grid structure, the metal grid lines covered by the BM on the edge sub-touch electrodes are designed more densely than the metal grid lines of the in-plane sub-touch electrodes, so that the narrow-frame effect can be further realized on the premise of keeping the touch performance.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic top view of a touch panel of the prior art;
FIG. 2 is a schematic view of a first structure of a first metal grid structure of the present invention;
FIG. 3 is a second schematic view of a first metal grid structure according to the present invention;
FIG. 4 is a schematic view of a third structure of the first metal grid structure of the present invention;
FIG. 5 is a schematic view of a first structure of a second metal grid structure of the present invention;
FIG. 6 is a schematic cross-sectional view of a touch panel according to the present invention;
fig. 7 is a schematic cross-sectional view of a touch display screen according to the present invention.
Detailed Description
In order to explain the touch screen and the manufacturing method thereof provided by the invention, the following detailed description is made in conjunction with the accompanying drawings of the specification and the text description of the embodiments.
The invention provides a metal grid structure and a touch screen adopting the metal grid structure.
In a specific embodiment, the metal grid structure may be designed as the first metal grid structure 10 or the second metal grid structure 20. The touch screen is formed by overlapping the first metal grid structure 10 and the second metal grid structure 20.
As shown in fig. 2, a first metal grid structure 10 provided by the embodiment of the present invention includes: the touch screen display device comprises metal grid lines formed by intersecting a plurality of metal lines, wherein the metal grid lines are separated by one breaking line 110 to form first touch electrode channels and first Dummy blocks 111 which are arranged at intervals, the first touch electrode channels are connected with driving equipment, and the first Dummy blocks 111 are not connected with the driving equipment and only have an optical matching effect. The first touch electrode channel includes first edge sub-touch electrodes 113 located at two sides and first in-plane sub-touch electrodes 112 located in a plane (in an actual product, there are a plurality of first in-plane sub-touch electrodes 112 arranged at intervals by the first Dummy block 111). The outer portion of at least one of the first edge sub-touch electrodes 113 of the two first edge sub-touch electrodes 113 on two sides is covered by the BM, that is, the first edge sub-touch electrode 113 is divided into two parts by a boundary 210 between a visible area and a non-visible area, the outer portion is covered by the BM, the metal grid lines covered by the BM are designed more densely than the metal grid lines of the first in-plane sub-touch electrodes 112, and the width L1 of the first edge sub-touch electrode 113 with the more densely designed metal grid lines is smaller than the width L2 of the first in-plane sub-touch electrode 112.
In a specific embodiment, the width L1 of the first edge sub-touch electrode 113 provided with the first connection line 1101 is less than two-thirds of the width L2 of the first in-plane sub-touch electrode 112.
In other embodiments, the width L1 of the first edge sub-touch electrode 113 provided with the first connection line 1101 is less than one-half or one-third of the width L2 of the first in-plane sub-touch electrode 112.
In a specific embodiment, the width L2 of the first in-plane sub-touch electrode 112 is 1-5 mm.
In this embodiment, the break line 110 is a straight line, and in other embodiments, the break line 110 may also be a broken line or a curved line as long as the first touch electrode channel can be electrically isolated from the first Dummy block 111.
As shown in fig. 3, in another embodiment, a first connection line 1101 is disposed at an edge of at least one of the first edge sub-touch electrodes 113, and the first connection line 1101 connects outer edges of metal lines of the first edge sub-touch electrodes 113 in sequence.
In other embodiments, a second connection line may be disposed inside at least one of the first edge sub-touch electrodes 113, and the second connection line sequentially connects the insides of the metal lines of the first edge sub-touch electrodes 113.
In this embodiment, the first connection line 1101 or the second connection line is a straight line, and in other embodiments, the first connection line 1101 or the second connection line may be a polygonal line or a curved line as long as the outer edges or the inner sides of the metal lines of the first edge sub-touch electrodes 113 can be connected in sequence.
As shown in fig. 4, the first metal grid structure 10 of the present invention includes a breakpoint 1100, and the breakpoint 1100 is designed on the first Dummy block 111.
In other embodiments, the first touch electrode channel is also designed with a break point 1100, and the break point 1100 is designed on the first in-plane sub-touch electrode 112.
In a preferred embodiment, the number of the break points 1100 on the first Dummy block 111 is greater than the number of the break points 1100 on the first in-plane sub-touch electrode 112.
In other embodiments, the first edge sub-touch electrode 113 is also designed with a break point 1100.
In a preferred embodiment, the number of the break points 1100 on the first in-plane sub-touch electrode 112 is greater than the number of the break points 1100 on the first edge sub-touch electrode 113.
As shown in fig. 5, the second metal grid structure 20 provided by the embodiment of the present invention includes: the metal grid lines are formed by intersecting a plurality of metal lines, the metal grid lines are separated by one breaking line 110 to form second touch electrode channels and second Dummy blocks 211 which are arranged at intervals, the second touch electrode channels are connected with driving equipment, and the second Dummy blocks 211 are not connected with the driving equipment and only have an optical matching effect. The second touch electrode channel includes second edge sub-touch electrodes 213 at both sides and second in-plane sub-touch electrodes 212 within a plane. The metal grid lines of at least one of the second edge sub-touch electrodes 213 are denser than the metal grid line design of the second in-plane sub-touch electrode 212.
In other embodiments, a third connection line is disposed at an edge of at least one of the second edge sub-touch electrodes 213, and the third connection line connects outer edges of the metal lines of the second edge sub-touch electrodes 213 in sequence. The width L3 of the second edge sub-touch electrode 213 provided with the third connection line is smaller than the width L4 of the second in-plane sub-touch electrode 212.
In a specific embodiment, the width L3 of the second edge sub-touch electrode 213 provided with the third connection line is less than two-thirds of the width L4 of the second in-plane sub-touch electrode 212;
in other embodiments, the width L3 of the second edge sub-touch electrode 213 provided with the third connection line is less than one-half or one-third of the width L4 of the second in-plane sub-touch electrode 212.
In a specific embodiment, the width L4 of the second in-plane sub-touch electrode 212 is 1-5 mm.
In a specific embodiment, the break line 110 is a straight line, and in other embodiments, the break line 110 may also be a broken line or a curved line as long as the second touch electrode channel can be electrically isolated from the second Dummy block 211.
In other embodiments, a fourth connection line may be disposed inside the second edge sub-touch electrode 213, and the fourth connection line sequentially connects the inside of the metal lines of the second edge sub-touch electrode 213.
In a specific embodiment, the third connecting line or the fourth connecting line may be a straight line, and may also be a broken line or a curved line, as long as the outer edges or the inner sides of the metal lines of the second edge sub-touch electrodes 213 can be connected in sequence.
In an embodiment, the second metal grid structure 20 of the present invention also includes a breakpoint 1100, and the breakpoint 1100 is designed on the second Dummy block 211.
In other embodiments, the second touch electrode channel is also designed with a break point 1100, and the break point 1100 is designed on the second in-plane sub-touch electrode 212.
In a preferred embodiment, the number of the break points 1100 on the second Dummy block 211 is greater than the number of the break points 1100 on the second in-plane sub-touch electrode 212.
In other embodiments, the second edge sub-touch electrode 213 is also designed with a break point 1100.
In a preferred embodiment, the number of the break points 1100 on the second in-plane sub-touch electrode 212 is smaller than the number of the break points 1100 on the second edge sub-touch electrode 213.
As shown in fig. 6, the present invention further provides a touch panel, which includes a substrate 30, the substrate 30 has a first surface 300, a first metal mesh structure 10 is disposed on the first surface 300, an insulating layer 40 is disposed on a side of the first metal mesh structure 10 away from the first surface 300, and a second metal mesh structure 20 is disposed on a side of the insulating layer 40 away from the first surface 300.
In other embodiments, the second grid structure 20 in the touch screen may also be replaced by other common metal grid structures, that is, the edge sub-touch electrodes of the metal grid structure may not be designed to be more dense than the metal grid lines of the in-plane sub-touch electrodes, and may not be designed with connection lines or break points 1100.
As shown in fig. 7, the present invention provides a touch display screen, which includes the above touch screen, and further includes a display screen 50, wherein an adhesive layer 60 is disposed on the display screen 50, and the touch screen is disposed on a side of the adhesive layer 60 away from the display screen 50.
In other technical solutions, a non-display area of the touch display screen is further provided with a lead and a golden finger, and the lead and the golden finger are used for realizing connection between the touch electrode channel and the touch drive IC.
The metal mesh structure, the touch screen and the touch display screen using the metal mesh provided above are preferred embodiments, and should not be construed as limiting the scope of the present invention, and those skilled in the art should understand that various modifications or substitutions may be made without departing from the spirit of the present invention, and all modifications or substitutions should be considered to be within the scope of the present invention, that is, the scope of the present invention should be determined by the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
Claims (10)
1. A metal grid structure comprising: the touch screen display panel comprises metal grid lines formed by crossing a plurality of metal lines, wherein the metal grid lines are separated by one breaking line (110) to form first touch electrode channels and first Dummy blocks (111) which are arranged at intervals, the first touch electrode channels are connected with a driving device, and the first Dummy blocks (111) are not connected with the driving device;
the first touch electrode channel comprises first edge sub-touch electrodes (113) located on two sides and first in-plane sub-touch electrodes (112) located in a plane, wherein the outer part of at least one of the first edge sub-touch electrodes (113) is covered by a BM, the metal grid lines covered by the BM are designed more densely than the metal grid lines of the first in-plane sub-touch electrodes (112), and the width L1 of the first edge sub-touch electrode (113) with the densely designed metal grid lines is smaller than the width L2 of the first in-plane sub-touch electrode (112).
2. The metal mesh structure of claim 1, wherein a width L1 of the first edge sub-touch electrode (113) provided with a first connection line (1101) is less than two-thirds of a width L2 of the first in-plane sub-touch electrode (112).
3. The metal mesh structure of claim 1, wherein at least one of the first edge sub-touch electrodes (113) has a first connecting line (1101) disposed at an outer edge thereof, and the first connecting line (1101) connects outer edges of the metal lines of the first edge sub-touch electrodes (113) in sequence.
4. The metal mesh structure of claim 1, wherein at least one of the first edge sub-touch electrodes (113) is also provided with second connection lines on the inner side thereof, and the second connection lines connect the inner sides of the metal lines of the first edge sub-touch electrodes (113) in sequence.
5. The metal grid structure according to claim 1, characterized in that it further comprises a break point (1100), said break point (1100) being designed on said first Dummy block (111).
6. The metal grid structure of claim 5, wherein a break point (1100) is also designed on the first touch electrode channel, the break point (1100) being designed on the first in-plane sub-touch electrode (112);
the number of break points (1100) on the first Dummy block (111) is greater than the number of break points (1100) on the first in-plane sub-touch electrode (112).
7. The metal mesh structure as claimed in claim 6, wherein the first edge sub-touch electrode (113) is also designed with break points (1100), and the number of break points (1100) on the first in-plane sub-touch electrode (112) is greater than the number of break points (1100) on the first edge sub-touch electrode (113).
8. A touch screen comprising a substrate (30), said substrate (30) having a first surface (300), characterized in that a metal grid structure according to any one of claims 1-8 is provided on said first surface (300), an insulating layer (40) is provided on said metal grid structure on the side remote from said first surface (300), and a second metal grid structure (20) is provided on said insulating layer (40) on the side remote from said first surface (300).
9. Touch screen according to claim 8, the second metal grid structure (20) comprising: the metal grid lines are formed by intersecting a plurality of metal lines, the metal grid lines are separated by one breaking line (110), second touch electrode channels and second Dummy blocks (211) are formed in an interval arrangement, the second touch electrode channels are connected with driving equipment, and the second touch electrode channels comprise second edge sub-touch electrodes (213) positioned on two sides and second in-plane sub-touch electrodes (212) positioned in a plane;
wherein at least one of the second edge sub-touch electrodes (213) is designed more densely than the metal grid lines of the second in-plane sub-touch electrodes (212). A width L3 of the second edge sub-touch electrode (213) is less than a width L4 of the second in-plane sub-touch electrode (212).
10. A touch display screen, comprising the touch screen of claim 8 or 9, and further comprising a display screen (50), wherein the display screen (50) is provided with an adhesive layer (60), and the touch screen is provided on a side of the adhesive layer (60) away from the display screen (50).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911362411.4A CN111367427A (en) | 2019-12-26 | 2019-12-26 | Metal grid structure, touch screen and touch display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911362411.4A CN111367427A (en) | 2019-12-26 | 2019-12-26 | Metal grid structure, touch screen and touch display screen |
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| Publication Number | Publication Date |
|---|---|
| CN111367427A true CN111367427A (en) | 2020-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911362411.4A Pending CN111367427A (en) | 2019-12-26 | 2019-12-26 | Metal grid structure, touch screen and touch display screen |
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| CN (1) | CN111367427A (en) |
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- 2019-12-26 CN CN201911362411.4A patent/CN111367427A/en active Pending
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