CN203350856U - Touch screen - Google Patents

Abstract

A touch screen comprises a transparent substrate, an induction electrode and a driving electrode. The induction electrode comprises a first conductive pattern and a first electrode lead which extend continuously in the first parallel directions. The first conductive pattern comprises a first connection portion extending in the first direction and a plurality of first conductive pattern units extending in the parallel second directions, the first connection portion is connected with the first conductive pattern units, and the driving electrode and the induction electrode are arranged at intervals in the extending direction of the plane of the transparent substrate. The driving electrode comprises a second conductive pattern formed by a plurality of second conductive pattern blocks arranged at intervals and a second electrode lead. Each second conductive pattern block comprises a second connection portion extending in the direction parallel to the first directions and a second conductive pattern unit extending in the direction parallel to the second directions, and the second connection portion is connected with the second conductive pattern unit of the same second conductive pattern block. Each second conductive pattern unit is located between two adjacent first conductive pattern units, insulation layers are saved, and touch screen thickness is reduced.

Description

touch screen

technical field

The utility model relates to the technical field of plane display, in particular to a touch screen.

Background technique

A touch screen is an inductive device that can receive input signals such as touch. The touch screen has endowed information interaction with a new look and is a very attractive new information interaction device. The development of touch screen technology has aroused widespread concern in the information media circles at home and abroad, and has become a rising high-tech industry in the optoelectronic industry.

The thickness of the traditional touch screen is generally relatively thick, and the thickness of the touch screen includes the thickness of glass, the thickness of conductive materials, and the like. Touch screens have different structures, and different structures correspond to different thicknesses of touch screens:

The first structure: glass plus glass structure, two pieces of glass are superimposed, one piece of glass is used as conductive glass, and one piece of glass is used as cover glass;

The second structure: glass plus a transparent conductive film, and the transparent conductive film is pasted on the glass to form a touch screen structure;

The third structure: glass plus two transparent conductive films, the sensing electrodes and driving electrodes of the touch screen are respectively arranged on the two transparent conductive films, and then the transparent conductive films are attached to the glass;

The fourth structure: OGS (one glass solution), there is only one piece of glass, and the sensing electrodes and driving motors of the touch screen are arranged on the glass.

Among them, the thickness of the touch screen of the OGS structure is thinner than other structures in the background technology. Since the sensing electrodes and the driving electrodes cannot be conducted, in order to make the sensing electrodes and the driving electrodes on the same surface, the traditional technology is through bridging. way to achieve. However, the thickness of the insulating layer in the traditional OGS structure will affect the overall thickness of the touch screen. How to remove the thickness of the insulating layer at the bridging position has always been an urgent technical problem in the industry.

Utility model content

Based on this, it is necessary to provide a touch screen that can reduce the overall thickness for the problem that the insulating layer affects the overall thickness of the touch screen.

A touch screen comprising:

The transparent substrate includes a visible area, a non-visible area, and a junction area between the visible area and the non-visible area, the edge portion of the transparent base is the non-visible area, and the non-visible area a region enclosing the visible region;

The sensing electrode is arranged in the visible area of the transparent substrate, and the sensing electrode includes a continuous first conductive pattern extending parallel to the first direction and a first electrode lead, and the first electrode lead is connected to the first conductive pattern. The pattern is electrically connected, the first conductive pattern includes a first connecting portion extending parallel to the first direction and a plurality of first conductive pattern units extending parallel to the second direction, the first connecting portion connects the first conductive pattern units; and

The driving electrodes are arranged in the visible area of the transparent substrate, and are spaced apart from the sensing electrodes in the extension direction of the plane where the transparent substrate is located, and the driving electrodes include a second conductive pattern and a second electrode lead, so The second conductive pattern is composed of a plurality of second conductive pattern blocks arranged at intervals, the second electrode lead is electrically connected to the second conductive pattern block, and the second conductive pattern block includes The second connecting portion of the second conductive pattern unit and the second conductive pattern unit extending parallel to the second direction, the second connecting portion is connected to the second conductive pattern unit of the same second conductive pattern block;

Wherein, the second conductive pattern unit is located between two adjacent first conductive pattern units, and the first direction forms an included angle with the second direction.

In one embodiment, the first electrode lead and the second electrode lead are transparent indium tin oxide wires.

In one embodiment, the first conductive pattern and the second conductive pattern are transparent indium tin oxide patterns.

In one of the embodiments, the width of the junction area is less than 2.5 mm.

In one of the embodiments, it also includes a flexible circuit board, the first electrode lead and the second electrode lead are both electrically connected to the flexible circuit board, and the first electrode lead and the second electrode lead are insulated from each other. The two second electrode leads are insulated from each other, and the length of the second electrode leads electrically connected to the second conductive pattern block away from the flexible circuit board is greater than the length of the second electrode lead electrically connected to the second conductive pattern block close to the flexible circuit board, And the width of the second electrode lead is proportional to the length.

In one of the embodiments, the boundary line between the first conductive pattern unit and the second conductive pattern unit is a first fold line, and the first fold line includes a first line segment and a second line segment, and the first line segment and the second line segment The acute angle α ₁ formed by the second direction is 25 degrees to 35 degrees, and the acute angle α ₂ formed by the second line segment and the second direction is 25 degrees to 35 degrees.

In one of the embodiments, the boundary line between the first connection part and the second connection part is a second fold line, and the second fold line includes a third line segment and a fourth line segment, and the third line segment and the The acute angle β ₁ formed by the second direction is 70 degrees to 80 degrees, and the acute angle β ₂ formed by the fourth line segment and the second direction is 70 degrees to 80 degrees.

In the above touch screen, the sensing electrodes and the driving electrodes are located on the same surface of the transparent substrate, and the sensing electrodes and the driving electrodes are arranged at intervals in the extension direction of the plane where the transparent substrate is located, so the sensing electrodes and the driving electrodes are not connected, and the first conductive electrode of the sensing electrodes The pattern unit extends along the second direction, the second conductive pattern unit of the driving electrode extends along the second direction, and the second conductive pattern unit is located between two adjacent first conductive pattern units, so the sensing electrode and the driving electrode form a uniform Coupling capacitors, thereby eliminating the need for insulating layers and reducing the overall thickness of the touch screen.

Description of drawings

FIG. 1 is a schematic structural diagram of a touch screen;

FIG. 2 is a partially enlarged view of A in FIG. 1 .

Detailed ways

In order to make the above purpose, features and advantages of the present utility model more obvious and understandable, the specific implementation of the present utility model will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a full understanding of the present invention. However, the utility model can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific implementation disclosed below .

It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of this invention. The terminology used in the description of the utility model herein is only for the purpose of describing specific embodiments, and is not intended to limit the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Please refer to FIG. 1 , which is a schematic structural diagram of a touch screen 100 in an embodiment, and the touch screen 100 includes a transparent substrate 110 , sensing electrodes 120 and driving electrodes 130 .

The transparent substrate 110 is an insulating material, such as glass, specifically aluminosilicate glass and soda lime glass, and the surface has good adhesion after plasma treatment. Generally, the thickness of the transparent substrate 110 may range from 0.1 mm to 0.5 mm.

One side of the transparent substrate 110 includes a visible area 112 , a non-visible area 114 and a connecting area 116 where the visible area 112 and the non-visible area 114 border. The visible area 112 is located in the middle part of the transparent substrate 110, the non-visible area 114 is located at the edge of the transparent substrate 110, the non-visible area 114 surrounds the visible area 112, and the connecting area 116 is the visible area 112 and the non-visible area 114 part of the border.

The visible area 112 is used for arranging the sensing electrodes 120 and the driving electrodes 130 , so it is transparent. The non-visible area 114 is covered by black ink, so it is opaque. In the joint area 116, theoretically no touch information is provided, so it is also called a "dead area". The width of the joint area 116 is less than 2.5 mm, for example, it can be made 2.2 mm, and the width of the joint area 116 on each side is guaranteed to be consistent. The smaller the "dead zone", the closer the performance of the touch screen is to the traditional mutual capacitive screen.

Specifically in this embodiment, the sensing electrodes 120 and the driving electrodes 130 are described by taking the Y-axis as the first direction and the X-axis as the second direction in the two-dimensional coordinate system as an example. Of course, in other embodiments, the first direction and the second direction may also be arranged at other angles, as long as the first direction is not parallel to the second direction.

The sensing electrode 120 is disposed in the visible area 112 of the transparent substrate 110, and includes a continuous first conductive pattern 122 extending parallel to the Y axis, and also includes a first electrode lead 124, the first electrode lead 124 and the first conductive pattern 122 are electrically connected, and the continuous first conductive pattern 122 leads out of the connection area 116 through the first electrode lead 124 to connect with a flexible printed circuit board (Flexible Printed Circuit, FPC). The first conductive pattern 122 includes a first connecting portion 122a extending parallel to the Y axis and a plurality of first conductive pattern units 122b extending parallel to the X axis. The first connecting portion 122a connects the plurality of first conductive pattern units 122b.

Specifically in this embodiment, the first conductive pattern 122 may be a transparent ITO pattern, and the first electrode lead 124 may be a transparent ITO wire, so as to form a physically transparent sensing electrode 120 . Of course, in other embodiments, the first conductive pattern 122 can also be a grid-like pattern, and the first electrode lead 124 can also be a grid-like lead, and the width of the grid line is set to be invisible to the naked eye, forming a visually transparent The first conductive pattern 122 and the first electrode lead 124 .

The driving electrodes 130 are disposed in the visible area 112 of the transparent substrate 110 , and are spaced apart from the sensing electrodes 120 in the extending direction of the plane of the transparent substrate 110 , so that the sensing electrodes 120 and the driving electrodes 130 are not electrically connected. The driving electrode 130 includes a second conductive pattern 132 and a second electrode lead 134 . The second conductive pattern 132 is composed of a plurality of second conductive pattern blocks 1322 arranged at intervals, and the second electrode leads 134 are electrically connected to the second conductive pattern blocks 1322 , so the number of the second electrode leads 134 is also multiple. The plurality of second electrode leads 134 lead the plurality of second conductive pattern blocks 1322 out of the connection area 116 to connect with the FPC, but the plurality of second electrode leads 134 are not electrically connected and are insulated from each other. The first electrode leads 124 and the second electrode leads 134 are insulated from each other. The second conductive pattern block 1322 includes a second connecting portion 1322a extending parallel to the Y axis and a second conductive pattern unit 1322b extending parallel to the X axis. The second connecting portion 1322a connects the second conductive pattern of the same second conductive pattern block 1322 Pattern unit 1322b.

Wherein, the second conductive pattern unit 1322b is located between two adjacent first conductive patterns 122 to form a uniform coupling capacitance.

Specifically in this embodiment, the second conductive pattern 132 may be a transparent ITO pattern, and the second electrode lead 134 may be a transparent ITO wire, so as to form a physically transparent sensing electrode 120 . Of course, in other embodiments, the second conductive pattern 132 can also be a grid-like pattern, and the second electrode lead 134 can also be a grid-like lead, and the width of the grid line is set to be invisible to the naked eye, forming a visually transparent The second conductive pattern 132 and the second electrode lead 134 .

In the above-mentioned touch screen 100, since the sensing electrodes 120 and the driving electrodes 130 are located on the same surface of the transparent substrate 110, and the sensing electrodes 120 and the driving electrodes 130 are arranged at intervals in the extension direction of the plane where the transparent substrate 110 is located, the sensing electrodes 120 and the driving electrodes 130 non-conductive, the first conductive pattern unit 122b of the sensing electrode 120 extends along the second direction, the second conductive pattern unit 1322b of the drive electrode 130 extends along the second direction, and the second conductive pattern unit 1322b is located between two adjacent first Between the conductive pattern units 122 b , therefore, the sensing electrodes 120 and the driving electrodes 130 form a uniform coupling capacitance, thereby eliminating the insulating layer and reducing the overall thickness of the touch screen 100 .

Specifically in this embodiment, the width of the second electrode lead 134 is proportional to the length. That is, the longer the length of the second electrode lead 134 is, the wider the width of the second electrode lead 134 is, so that the impedance of the driving electrode 130 does not exceed the limit value. As in this embodiment, the length of the second electrode lead 134 electrically connected to the second conductive pattern block 1322 away from the FPC is longer than the length of the second electrode lead 134 electrically connected to the second conductive pattern block 1322 close to the FPC, so the The width of the second electrode lead 134 electrically connected to the second conductive pattern block 1322 away from the FPC is greater than the width of the second electrode lead 134 electrically connected to the second conductive pattern block 1322 close to the FPC.

Please refer to Fig. 2, which is a partially enlarged view of A in Fig. 1 . Specifically in this embodiment, the boundary line between the first conductive pattern unit 122b and the second conductive pattern unit 1322b is the first fold line 12b, and the first fold line 12b includes a first line segment 120b and a second line segment 121b. The acute angle α ₁ formed by the line segment 120b and the second direction is 25 degrees to 35 degrees, and the acute angle α ₂ formed by the second line segment 121b and the second direction is 25 degrees to 35 degrees. The boundary line between the first connection part 122a and the second connection part 1322a is the second fold line 12a, and the second fold line 12a includes a third line segment 120a and a fourth line segment 121a, and the third line segment 120a is connected to the second line segment 120a. The acute angle _β1 formed by the directions is 70°-80°, and the acute angle _β2 formed by the fourth line segment 121a and the second direction is 70°-80°. Theoretically, the sensing electrode 120 is parallel to the Y axis, and the driving electrode 130 is parallel to the X axis, so the above-mentioned broken line should be changed to a straight line, but because the broken line can increase the coupling degree of the electrodes in the X and Y directions, the use of the folded angle is not very large. of polylines.

The above-mentioned embodiments only express several implementations of the utility model, and the description thereof is relatively specific and detailed, but it should not be construed as limiting the patent scope of the utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (7)

1. a touch-screen, is characterized in that, comprising:

Transparent substrates, comprise the linking district that visible area, non-visible area and described visible area and described non-visible area have a common boundary, and the marginal portion of described transparent substrates is described non-visible area, and described non-visible area surrounds described visible area;

Induction electrode, be arranged at the visible area of described transparent substrates, described induction electrode comprises the first continuous conductive pattern and the first contact conductor extended along parallel first direction, described the first contact conductor is electrically connected to described the first conductive pattern, described the first conductive pattern comprises the first connecting portion and a plurality of the first conductive pattern unit that extend along parallel second direction extended along parallel first direction, and described the first connecting portion connects described the first conductive pattern unit; And

Drive electrode, be arranged at the visible area of described transparent substrates, and spaced on the extension direction on plane, described transparent substrates place with described induction electrode, described drive electrode comprises the second conductive pattern and the second contact conductor, the second conductive pattern piece that described the second conductive pattern is arranged by a plurality of spaces forms, described the second contact conductor is electrically connected to described the second conductive pattern piece, described the second conductive pattern piece comprises the second connecting portion extended along parallel first direction and the second conductive pattern unit extended along parallel second direction, described the second connecting portion connects the second conductive pattern unit of same described the second conductive pattern piece,

Wherein, described the second conductive pattern unit is between adjacent two described the first conductive pattern unit, and described first direction and described second direction form angle.

2. touch-screen according to claim 1, is characterized in that, described the first contact conductor and the second contact conductor are transparent indium oxide solder.

3. touch-screen according to claim 1, is characterized in that, described the first conductive pattern and the second conductive pattern are transparent tin indium oxide pattern.

4. touch-screen according to claim 1, is characterized in that, the width in described linking district is less than 2.5mm.

5. touch-screen according to claim 1, it is characterized in that, also comprise flexible PCB, described the first contact conductor and the second contact conductor all are electrically connected to described flexible PCB, and described the first contact conductor and the second contact conductor mutually insulated, a plurality of the second contact conductor mutually insulateds, the length of the second contact conductor be electrically connected to the second conductive pattern piece away from flexible PCB is greater than the length of the second contact conductor be electrically connected to the second conductive pattern piece near flexible PCB, and the width of described the second contact conductor is directly proportional to length.

6. touch-screen according to claim 1, it is characterized in that, the boundary line of described the first conductive pattern unit and the second conductive pattern unit is the first broken line, and described the first broken line comprises the first line segment and the second line segment, the sharp angle α that described the first line segment becomes with described second direction ₁be 25 degree～35 degree, the sharp angle α that described the second line segment becomes with described second direction ₂be 25 degree～35 degree.

7. touch-screen according to claim 1, it is characterized in that, the boundary line of described the first connecting portion and described the second connecting portion is the second broken line, and described the second broken line comprises the 3rd line segment and the 4th line segment, the acute angles beta that described the 3rd line segment becomes with described second direction ₁be 70 degree～80 degree, the acute angles beta that described the 4th line segment becomes with described second direction ₂be 70 degree～80 degree.

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