CN109782953B - Touch structure and touch display device - Google Patents
Touch structure and touch display device Download PDFInfo
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- CN109782953B CN109782953B CN201910052754.4A CN201910052754A CN109782953B CN 109782953 B CN109782953 B CN 109782953B CN 201910052754 A CN201910052754 A CN 201910052754A CN 109782953 B CN109782953 B CN 109782953B
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Abstract
A touch structure, comprising: the sensing electrode is used for realizing touch sensing operation; the first virtual electrode is adjacent to the sensing electrode and is arranged at an insulating interval; the second virtual electrode is positioned on one side of the first virtual electrode, which is far away from the sensing electrode, and is insulated and arranged with the first virtual electrode at intervals, and the area of the first virtual electrode is smaller than that of the second virtual electrode; the sensing electrode, the first virtual electrode and the second virtual electrode are formed by the same conducting layer, the conducting layer comprises a grid formed by a plurality of metal wires in a staggered mode, breakpoints are formed in part of the metal wires, and the sensing electrode and the first virtual electrode as well as the first virtual electrode and the second virtual electrode are insulated and spaced through the breakpoints. A touch display device using the touch structure is also provided.
Description
Technical Field
The present invention relates to the field of touch technologies, and in particular, to a touch structure and a touch display device.
Background
Generally, the touch structure includes a plurality of sensing electrodes, and for the capacitive touch structure, the area of the sensing electrode affects the corresponding capacitance value. When the sensing electrodes are made of metal mesh (metal mesh), in order to avoid the sensing electrodes from being too obvious or moire interference when the sensing electrodes are stacked, a part of the metal mesh pattern is reserved between adjacent sensing electrodes as a dummy electrode in order to consider the overall visual effect. Therefore, the effect of visual integrity can be maintained, the capacitance signal can be slightly increased, and the linearity is improved.
However, when there is an Electrostatic Discharge (ESD) phenomenon, a very large Discharge current is formed between the adjacent dummy electrode and the sensing electrode, which is likely to cause a short circuit between the dummy electrode and the sensing electrode, resulting in an increase in the area of the equivalent sensing electrode and an abnormal touch signal.
Disclosure of Invention
The invention provides a touch structure, which comprises:
the sensing electrode is used for realizing touch sensing operation;
the first virtual electrode is adjacent to the sensing electrode and is arranged at an insulating interval; and
the second virtual electrode is positioned on one side of the first virtual electrode, which is far away from the sensing electrode, and is arranged at an insulating interval with the first virtual electrode, and the area of the first virtual electrode is smaller than that of the second virtual electrode;
the sensing electrode, the first virtual electrode and the second virtual electrode are formed by the same conductive layer, the conductive layer comprises a grid formed by a plurality of metal wires in a staggered mode, a part of the metal wires are provided with break points, and insulation intervals are formed between the sensing electrode and the first virtual electrode and between the first virtual electrode and the second virtual electrode through the break points.
The invention also provides a touch display device, which comprises a touch panel and a display panel arranged on one side of the touch panel, wherein the touch panel comprises a cover plate and the touch structure arranged between the cover plate and the display panel.
The invention also provides a touch display device, which comprises a cover plate, a display panel arranged on one side of the cover plate and the touch structure embedded in the display panel.
According to the touch structure and the touch display device, the sensing electrode and the first virtual electrode and the second virtual electrode are insulated and separated through the break points, the area of the first virtual electrode is smaller than that of the second virtual electrode, and when an electrostatic discharge phenomenon occurs, the sensing electrode is firstly conducted with the first virtual electrode with a smaller area and then conducted with the second virtual electrode with a larger area. Thus, the antistatic ability is improved. In addition, since the area of the first dummy electrode is small, even if the sensing electrode is in conduction with the first dummy electrode, the influence of the area of the equivalent sensing electrode is very small. Thus, the large capacitance effect caused by the short circuit of the electrodes can be improved.
Drawings
Fig. 1 is a schematic perspective view of a touch display device according to an embodiment of the invention.
Fig. 2 is a cross-sectional view of fig. 1 taken along section line II-II.
Fig. 3 is a schematic plan view of a touch structure according to an embodiment of the invention.
Fig. 4 is an enlarged view at IV in fig. 3.
Fig. 5 is a schematic plan view of a touch structure according to a second embodiment of the invention.
Fig. 6 is an enlarged view at VI in fig. 5.
Fig. 7 is a schematic plan view of a touch structure according to a third embodiment of the invention.
Fig. 8 is an enlarged view at VIII in fig. 7.
Fig. 9 is a cross-sectional view of a touch display device according to a second embodiment of the invention.
Fig. 10 is a cross-sectional view of a touch display device according to a third embodiment of the invention.
Fig. 11 is a cross-sectional view of a touch display device according to a fourth embodiment of the invention.
Description of the main elements
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
As shown in fig. 1, the touch display device 100 defines a display area 101 and a frame area 102 surrounding the display area 101. The touch display device 100 may be a mobile phone, a tablet computer, an intelligent wearable device (such as a smart watch), or the like.
As shown in fig. 2, which is a cross-sectional view of fig. 1 taken along section line II-II. The touch display device 100 includes a touch panel 10 and a display panel 20 disposed on one side of the touch panel 10. The touch panel 10 includes a substrate 13, a touch structure 12 disposed on a surface of the substrate 13, and a cover plate 11 disposed on a side of the touch structure 12 away from the substrate 13. The display panel 20 is located on a side of the substrate 13 away from the cover plate 11. The display panel 20, the substrate 13 and the touch structure 12 are disposed corresponding to the display area 101.
In this embodiment, the touch display device 100 includes only one layer of the touch structure 12. The touch structure 12 may form a single-layer self-capacitance touch sensing structure or a single-layer mutual capacitance touch sensing structure. When a conductive object (e.g., a finger) touches a position of the cover plate 11 corresponding to the display area 101, a difference occurs in capacitance sensing signals of the area, and the capacitance sensing signals are processed and converted to obtain a relative position of a touch point.
In one embodiment, the cover plate 11 is made of glass, such as soda glass, aluminosilicate glass, and alkali-free glass. In other embodiments, the cover plate 11 may be made of transparent plastic or any other material with a certain transmittance that can protect the structure attached thereto.
In one embodiment, the substrate 13 may be glass. In another embodiment, the substrate 13 may be a flexible substrate 13, such as Polyimide (PI), polymethyl methacrylate (PMMA), Polycarbonate (PC), polyethylene Terephthalate (PET), and the like.
In one embodiment, the display panel 20 is a liquid crystal display panel. In another embodiment, the display panel 20 may also be a micro Light Emitting Diode (LED) display panel or an Organic Light Emitting Diode (OLED) display panel.
In one embodiment, a light shielding layer (not shown) is disposed on a side of the cover plate 11 facing the display panel 20 corresponding to the frame region 102. The light shielding layer may be light shielding ink formed on the cover plate 11 by printing, spraying or sputtering. The light-shielding ink may be an Epoxy Type (Epoxy Type) ink, an Acrylic Type (Acrylic Type) ink, a silicone Type (silicone Type) ink, or the like.
In one embodiment, between the cover plate 11 and the touch structure 12; transparent insulating glue layers are arranged between the display panel 20 and the substrate 13 of the touch panel 10 for bonding. In an embodiment, the transparent insulating Adhesive layer may be made of, but not limited to, an Adhesive with high light transmittance, such as a solid Optical Clear Adhesive (OCA) or a Liquid Optical Clear Adhesive (LOCA), so as not to affect the display effect.
Fig. 3 is a schematic plan view of the touch structure 12 according to an embodiment of the invention. The touch structure 12 includes a plurality of sense electrode serials 30 and a plurality of dummy electrode regions 40.
Each sensing electrode serial 30 includes a plurality of sensing electrodes 31 for performing a touch sensing operation and a plurality of connection parts 32 connecting two adjacent sensing electrodes 31. Each sensing electrode string 30 extends along the first direction D1, and the plurality of sensing electrode strings 30 are arranged at intervals along the second direction D2. The first direction D1 and the second direction D2 intersect.
In one embodiment, the first direction D1 is orthogonal to the second direction D2. In other embodiments, the first direction D1 can intersect the second direction D2 at other angles than a right angle.
As shown in fig. 3, in the second direction D2, a dummy electrode region 40 is defined between every two adjacent sensing electrode serials 30, and the dummy electrode regions 40 and the sensing electrode serials 30 are arranged at insulating intervals. In shape, the dummy electrode regions 40 and the sense electrode serials 30 are complementarily arranged. That is, the sum of the surface areas of all the dummy electrode regions 40 and the surface areas of all the sense electrode serials 30 is equal to the surface area of the touch structure 12.
Referring to fig. 3, the dummy electrode region 40 includes a plurality of dummy electrode groups 41 spaced apart from each other and insulated from each other along the first direction D1. Each of the dummy electrode groups 41 is located in an area surrounded by the four sensing electrodes 31 and the two connecting portions 32 in the two adjacent sensing electrode serials 30. Each of the dummy electrode groups 41 includes a plurality of first dummy electrodes 411 and a plurality of second dummy electrodes 412. The first dummy electrode 411 is adjacent to the sensing electrode string 30 and is disposed at an insulating interval. The second dummy electrode 412 is located on a side of the first dummy electrode 411 away from the sensing electrode string 30 and is spaced apart from the first dummy electrode 411. The area of the first dummy electrode 411 is smaller than that of the second dummy electrode 412.
As shown in fig. 3, each of the dummy electrode groups 41 includes four first dummy electrodes 411 and four second dummy electrodes 412. Wherein only one first dummy electrode 411 is disposed between one second dummy electrode 412 and one sensing electrode serial 30. Each of the second dummy electrodes 412 has a pentagonal shape. Each of the first dummy electrodes 411 extends along the outline of the second dummy electrode 412 in a stripe shape.
Referring to fig. 3 and 4, the sensing electrode serial 30, the first dummy electrode 411 and the second dummy electrode 412 are formed by the same conductive layer including a grid formed by a plurality of metal lines 50 that are interlaced with each other. A break point C is formed on a portion of the metal wire 50. Between sensing electrode 31 and first dummy electrode 411; the first dummy electrode 411 and the second dummy electrode 412 are insulated and spaced by a break point C. In one embodiment, the minimum distance D for breaking the metal line 50 with the breaking point C may be 30-50 micrometers. That is, the distance between the sensing electrode 31 and the first dummy electrode 411 and between the first dummy electrode 411 and the second dummy electrode 412 is 30 micrometers to 50 micrometers.
In one embodiment, the metal lines 50 may be made of conductive metal such as silver, copper, gold, aluminum, iron, etc. In other embodiments, the metal wire 50 may be made of a metal alloy.
In an embodiment, the sensing electrode serial 30, the first dummy electrode 411 and the second dummy electrode 412 may be formed by development etching or laser etching.
In this embodiment, the conductive layer corresponding to the dummy electrode region 40 adjacent to the sensing electrode serial 30 is divided into the plurality of first dummy electrodes 411 and the plurality of second dummy electrodes 412, and the area of the first dummy electrodes 411 adjacent to the sensing electrode serial 30 is smaller than that of the second dummy electrodes 412. When the ESD phenomenon occurs, the sensing electrode string 30 is first conducted with the first dummy electrode 411 with a smaller area and then conducted with the second dummy electrode 412 with a larger area. Thus, the antistatic capability of the touch structure 12 is improved. In addition, since the area of the first dummy electrode 411 is small, even if the sensing electrode serial 30 is in conduction with the first dummy electrode 411, the influence of the area of the equivalent sensing electrode is very small. Thus, the large capacitance effect caused by the short circuit of the electrodes can be improved.
Referring to fig. 5 and fig. 6, in another embodiment, a plurality of first dummy electrodes 411 are disposed between one sensing electrode serial 30 and one second dummy electrode 412, and the plurality of first dummy electrodes 411 are arranged at intervals along the outline of the second dummy electrode 412. The area of each first dummy electrode 411 is smaller than that of the first dummy electrode 411 shown in fig. 3. Thus, when the esd event occurs, the sensing electrode string 30 is first conducted to the first dummy electrode 411 with a smaller area. Since the area of the first dummy electrode 411 is smaller, the influence on the area of the equivalent sensing electrode is smaller, and the influence on the touch signal is also very small.
Referring to fig. 7 and 8, in a further embodiment, a plurality of first dummy electrodes 411 are disposed between one sensing electrode serial 30 and one second dummy electrode 412, and the plurality of first dummy electrodes 411 are arranged at intervals along a direction perpendicular to the outline of the second dummy electrode 412. Therefore, an insulation defense line is additionally arranged between the sensing electrode serial 30 and the second virtual electrode 412 with a larger area, and the influence of the electrostatic discharge phenomenon on the touch signal is further improved.
As shown in fig. 9, in another embodiment, the touch display device 100 includes a touch panel 10 and a display panel 20 disposed on one side of the touch panel 10. The touch panel 10 includes a cover 11, a first touch structure 121, a substrate 13, and a second touch structure 122. The first touch structure 121 is disposed on the surface of the substrate 13 close to the cover plate 11, and the second touch structure 122 is disposed on the surface of the substrate 13 close to the display panel 20. The first touch structure 121 can be any one of the touch structures 12 shown in fig. 3 to 8, and the second touch structure 122 can also be any one of the touch structures 12 shown in fig. 3 to 8.
The first touch structure 121 and the second touch structure 122 are different in that the extending directions of the sensing electrode serials 30 and the virtual electrode regions 40 in the first touch structure 121 are perpendicular to the extending directions of the sensing electrode serials 30 and the virtual electrode regions 40 in the second touch structure 122. The sensing electrode serials 30 in the first touch structure 121 can be touch driving electrodes, and the sensing electrode serials 30 in the second touch structure 122 can be touch sensing electrodes; or the sensing electrode serials 30 in the first touch structure 121 can be touch sensing electrodes, and the sensing electrode serials 30 in the second touch structure 122 can be touch driving electrodes. The sensing electrode serials 30 in the first touch structure 121 and the sensing electrode serials 30 in the second touch structure 122 form a mutual capacitance type touch sensing structure.
When a conductive object (e.g., a finger) touches a position of the cover 11 corresponding to the display area 101, the capacitive coupling between the sensing electrode serial 30 in the first touch structure 121 and the sensing electrode serial 30 in the second touch structure 122 corresponding to the vicinity of the touch point is affected, so that the sensing signal (e.g., a voltage value) related to the mutual capacitance changes, and the coordinates of each touch point can be calculated.
As shown in fig. 10, in another embodiment, the touch display device 100 includes a touch panel 10 and a display panel 20 disposed on one side of the touch panel 10. The touch panel 10 includes a cover 11 and a touch structure 12 disposed on a surface of the cover 11 close to the display panel 20. That is, in the embodiment, the touch panel 10 is an integrated touch panel (OGS), and the touch display device 100 includes only One layer of touch structures 12. The touch structure 12 may be any one of the touch structures 12 shown in fig. 3 to 8. The touch structure 12 may form a single-layer self-capacitance touch sensing structure or a single-layer mutual capacitance touch sensing structure. When a conductive object (e.g., a finger) touches a position of the cover plate 11 corresponding to the display area 101, a difference occurs in capacitance sensing signals of the area, and the capacitance sensing signals are processed and converted to obtain a relative position of a touch point.
As shown in fig. 11, in another embodiment, the touch display device 100 includes a cover plate 11, a display panel 20 disposed on one side of the cover plate 11, and a touch structure 12 embedded in the display panel 20. That is, In the present embodiment, the touch display device 100 employs In Cell touch technology. The touch structure 12 may be any one of the touch structures 12 shown in fig. 3 to 8. In addition, the display panel 20 may be a liquid crystal display panel, a micro Light Emitting Diode (LED) display panel, or an Organic Light Emitting Diode (OLED) display panel. For example, when the display panel 20 is a liquid crystal display panel, the liquid crystal display panel may include an array substrate (not shown) and a color filter substrate (not shown), and the touch structure 12 may be disposed between the array substrate and the color filter substrate.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.
Claims (9)
1. A touch structure, comprising:
the touch sensing device comprises a plurality of sensing electrode serials, a plurality of touch sensing electrode serials and a plurality of touch sensing electrode serials, wherein each sensing electrode serials extends along a first direction, the plurality of sensing electrode serials are arranged at intervals along a second direction crossed with the first direction, each sensing electrode serials comprises a plurality of sensing electrodes and a plurality of connecting parts, each connecting part is connected with two adjacent sensing electrodes, and the sensing electrodes are used for realizing touch sensing operation; and
a plurality of dummy electrode regions, each of the dummy electrode regions being located between two adjacent sense electrode serials; in shape, the sensing electrode serial and the virtual electrode area are arranged complementarily; each virtual electrode area comprises a plurality of virtual electrode groups arranged at intervals in an insulating mode, and each virtual electrode group is located in an area defined by four sensing electrodes in two adjacent sensing electrode strings and two connecting parts;
wherein each of the virtual electrode sets includes:
a plurality of first dummy electrodes, each of which is adjacent to the sensing electrode and is disposed at an insulating interval; and
each second virtual electrode is pentagonal, each second virtual electrode is positioned on one side, away from the sensing electrode, of the first virtual electrode and is arranged at an interval with the first virtual electrode in an insulating manner, and the area of the first virtual electrode is smaller than that of the second virtual electrode;
the sensing electrode, the first virtual electrode and the second virtual electrode are formed by the same conductive layer, the conductive layer comprises a grid formed by a plurality of metal wires in a staggered mode, a part of the metal wires are provided with break points, and insulation intervals are formed between the sensing electrode and the first virtual electrode and between the first virtual electrode and the second virtual electrode through the break points.
2. The touch structure of claim 1, wherein only one first dummy electrode is disposed between one sensing electrode and one second dummy electrode, and the first dummy electrode extends along a contour of the second dummy electrode.
3. The touch structure of claim 1, wherein a plurality of the first dummy electrodes are disposed between one of the sensing electrodes and one of the second dummy electrodes, and the plurality of the first dummy electrodes are arranged at intervals along a contour of the second dummy electrodes.
4. The touch structure of claim 1, wherein a plurality of the first dummy electrodes are disposed between one of the sensing electrodes and one of the second dummy electrodes, and the plurality of the first dummy electrodes are arranged at intervals in a direction perpendicular to an outline of the second dummy electrodes.
5. The touch structure of claim 1, wherein the minimum distance for the metal line with the break point to break is 30-50 μm.
6. A touch display device, comprising:
a display panel; and
the touch panel is arranged on one side of the display panel and comprises:
a cover plate; and
a touch structure disposed between the cover plate and the display panel,
the touch structure is the touch structure according to any one of claims 1 to 5.
7. The touch display device of claim 6, wherein the touch structure is disposed on a surface of the cover plate close to the display panel.
8. The touch display device of claim 6, wherein the touch panel further comprises a substrate, the substrate is located between the touch structure and the display panel, and the touch structure is disposed on a surface of the substrate away from the display panel.
9. A touch display device, comprising a cover plate, a display panel disposed on one side of the cover plate, and a touch structure embedded in the display panel, wherein the touch structure is the touch structure according to any one of claims 1 to 5.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910052754.4A CN109782953B (en) | 2019-01-21 | 2019-01-21 | Touch structure and touch display device |
| TW108103403A TWI699599B (en) | 2019-01-21 | 2019-01-29 | Touch structure and touch display device |
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| CN201910052754.4A CN109782953B (en) | 2019-01-21 | 2019-01-21 | Touch structure and touch display device |
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| CN109782953A CN109782953A (en) | 2019-05-21 |
| CN109782953B true CN109782953B (en) | 2022-04-15 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110162214B (en) * | 2019-05-05 | 2020-10-13 | 武汉华星光电半导体显示技术有限公司 | Touch panel |
| CN111324233A (en) * | 2020-02-15 | 2020-06-23 | 业成科技（成都）有限公司 | Touch sensing film and touch display device |
| CN111596791A (en) | 2020-04-28 | 2020-08-28 | 北京载诚科技有限公司 | Touch panel |
| CN111651099A (en) | 2020-04-28 | 2020-09-11 | 北京载诚科技有限公司 | Touch device |
| CN111831172B (en) * | 2020-09-21 | 2021-04-09 | 京东方科技集团股份有限公司 | Touch structure, touch display panel and electronic device |
| TWI744051B (en) * | 2020-10-26 | 2021-10-21 | 欣興電子股份有限公司 | Touch display device and manufacturing method thereof |
| KR20220073302A (en) | 2020-11-26 | 2022-06-03 | 엘지디스플레이 주식회사 | Touch display device |
| CN112732123A (en) * | 2021-02-26 | 2021-04-30 | 业成科技（成都）有限公司 | Touch panel and touch display device using same |
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Also Published As
| Publication number | Publication date |
|---|---|
| TW202028832A (en) | 2020-08-01 |
| TWI699599B (en) | 2020-07-21 |
| CN109782953A (en) | 2019-05-21 |
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