CN110045871B - Touch panel and touch display device using same - Google Patents
Touch panel and touch display device using same Download PDFInfo
- Publication number
- CN110045871B CN110045871B CN201910317974.5A CN201910317974A CN110045871B CN 110045871 B CN110045871 B CN 110045871B CN 201910317974 A CN201910317974 A CN 201910317974A CN 110045871 B CN110045871 B CN 110045871B
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- touch
- insulating substrate
- touch panel
- disposed
- pad
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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
A touch panel is defined with a touch area and a frame area surrounding the touch area. The touch panel comprises an insulating substrate with an upper surface and a lower surface which are opposite, the upper surface is provided with a plurality of first touch electrodes, the lower surface is provided with a plurality of second touch electrodes, and the first touch electrodes and the second touch electrodes are located in a touch area. The touch panel further comprises a plurality of first wires arranged on the insulating substrate and located in the frame area, one end of each first wire is connected with the first touch electrode, the other end of each first wire is connected with the first connecting pad, and the first connecting pad is arranged on the upper surface. The lower surface is provided with a conducting layer, and the projection of the conducting layer on the insulating substrate along the normal direction of the insulating substrate surrounds each first connecting pad and does not contact and overlap with the first connecting pad. The invention also provides a touch display device applying the touch panel. By arranging the conductive layer surrounding the first connecting pad on the insulating substrate, the error reporting point caused by the active pen touch on the frame area can be effectively avoided.
Description
Technical Field
The present invention relates to a touch panel and a touch display device using the same, and more particularly, to a touch display device with a stylus.
Background
A conventional touch display device generally includes a touch panel and a display panel stacked together. The touch display device is defined with a display touch area and a frame area surrounding the display touch area. The touch panel generally includes a substrate, a plurality of touch driving (Tx) electrodes, an insulating layer, and a plurality of touch sensing (Rx) electrodes sequentially stacked on a surface of the substrate, where the insulating layer is stacked between the Tx electrodes and the Rx electrodes, and a plurality of metal leads electrically connected to the Tx electrodes and the Rx electrodes, respectively, are further disposed on the substrate, where the Tx electrodes and the Rx electrodes are disposed in a display touch region, and the metal leads are disposed in a frame region. One end of the metal lead is electrically connected with the Tx electrode or the Rx electrode, and the other end of the metal lead extends to a binding area in the frame area and is electrically connected with the control circuit.
In the conventional high-order touch display device, a very narrow frame region is usually configured and is matched with an active pen as an input device. An active pen typically includes a pen body, an internal signal driver circuit disposed in the pen body, and a battery that powers the signal driver circuit, which generates an active excitation signal. The active pen sends out an excitation signal, and a touch sensor arranged in the display touch area receives the signal of the active pen. However, since the lines in the bonding area are the most dense and the conductive area is relatively large, when the pen point of the active pen touches the bonding area in the frame area, an erroneous sensing (false alarm point) is easily generated in the display touch area, and even when the pen point of the active pen touches the trace in the frame area, a slight amount of sensing is also generated.
Disclosure of Invention
Therefore, it is desirable to provide a touch panel capable of effectively avoiding the occurrence of error reporting caused by the active pen touch on the frame area.
In one aspect, the present invention provides a touch panel, which defines a touch area and a frame area surrounding the touch area, the touch panel including:
an insulating substrate including an upper surface and a lower surface disposed opposite to each other;
a plurality of first touch electrodes on the upper surface;
the plurality of second touch electrodes are positioned on the lower surface, and the first touch electrodes and the second touch electrodes are crossed in an insulating way and positioned in the touch area;
a plurality of first traces arranged on the insulating substrate and located in the frame area, wherein one end of each first trace is connected with the first touch electrode, the other end of each first trace is connected with a first connecting pad, and the first connecting pad is arranged on the upper surface;
the first two-wire array is arranged on the insulating substrate and positioned in the frame area, one end of each first two-wire array is connected with the first touch electrode, the other end of each first two-wire array is connected with the first connecting pad, and the first connecting pad and the second connecting pad define a bonding area positioned in the frame area;
the lower surface is provided with a latticed conducting layer, and the projection of the conducting layer on the insulating substrate along the normal direction of the insulating substrate surrounds each first connecting pad and is not in contact and overlapped with the first connecting pad.
Another aspect of the present invention provides a touch display device, which includes a display panel and a touch panel disposed on the display panel.
The invention can effectively avoid error point caused by the active pen touch on the frame area by arranging the conducting layer surrounding the first connecting pad on the insulating substrate.
Drawings
Fig. 1 is a schematic view of a touch panel according to a first embodiment of the invention.
Fig. 2 is a partial schematic view of the touch panel of fig. 1.
Fig. 3 is a schematic cross-sectional view of the touch panel of fig. 1 taken along a sectional line III-III.
Fig. 4 is a schematic view of a touch panel according to a second embodiment of the present invention.
FIG. 5 is a diagram of a touch panel according to a third embodiment of the present invention.
FIG. 6 is a diagram of a touch panel according to a fourth embodiment of the present invention.
Fig. 7 is a schematic cross-sectional view of the touch panel of fig. 6 taken along a section line VII-VII.
Fig. 8 is a schematic view of a touch panel according to a fifth embodiment of the present invention.
Fig. 9 is a schematic cross-sectional view of the touch panel of fig. 8 taken along a sectional line IX-IX.
Fig. 10 is a schematic cross-sectional view of a touch display device according to a preferred embodiment of the invention.
Description of the main elements
The present invention will be further described with reference to the accompanying drawings.
Detailed Description
While the embodiments of the invention are illustrated in the drawings, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the size of layers and regions may be exaggerated for clarity.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Referring to fig. 1, a touch panel 100 according to a preferred embodiment of the invention is defined with a touch area 101 and a frame area 103 surrounding the touch area 101.
Referring to fig. 3, the touch panel 100 includes an insulating substrate 10. The insulating substrate 10 includes an upper surface 11 and a lower surface 12 disposed opposite to each other. A plurality of first touch electrodes 20 and a plurality of second touch electrodes 30 are formed on the insulating substrate 10. The plurality of first touch electrodes 20 are formed on the upper surface 11, and the plurality of second touch electrodes 30 are formed on the lower surface 12. The plurality of first touch electrodes 20 and the plurality of second touch electrodes 30 are disposed in the touch area 101.
In this embodiment, the sensing method of the touch panel 100 is mutual capacitive. Each of the first touch electrodes 20 extends in a long stripe shape along the first direction D1, and each of the second touch electrodes 30 extends in a long stripe shape along the second direction D2. The second direction intersects the first direction, and in this embodiment, the second direction intersects the first direction perpendicularly. Thus, the first touch electrode 20 and the second touch electrode 30 are crossed in an insulating manner. In the present embodiment, the first touch electrodes 20 are touch sensing (Rx) electrodes, and the second touch electrodes 30 are touch driving (Tx) electrodes. It is understood that, in other embodiments, the first touch electrode 20 may be a Tx electrode, and the second touch electrode 30 may be an Rx electrode. In this embodiment, the first touch (Rx) electrodes 20 are disposed on the upper surface 11 of the insulating substrate 10, and the second touch (Tx) electrodes 30 are disposed on the lower surface 12 of the insulating substrate 10.
As shown in fig. 1, the touch panel 100 further includes a plurality of traces electrically connected to the first touch electrodes 20 and the second touch electrodes 30, respectively. A plurality of traces are disposed in the border area 103. In this embodiment, the trace connected to the first touch electrode 20 among the plurality of traces is defined as a first trace 51, and the trace connected to the second touch electrode 30 is defined as a second trace 52. Bezel area 103 also includes a bonding area 105. The traces extend to the bonding area 105 and are electrically connected to a control circuit (e.g., an FPC, not shown).
As shown in fig. 2, one end of each first trace 51 is connected to a contact pad 53a, the other end of the first trace 51 is connected to a first connection pad 54a, each first trace 51 is connected to one first touch electrode 20 through the contact pad 53a, and the first connection pad 54a is disposed in the bonding region 105 to communicate with the control circuit through the first connection pad 54 a. As shown in fig. 2, one end of each of the second traces 52 is connected to a contact pad 53b, the other end thereof is connected to a second connection pad 54b, each of the second traces 52 is connected to one of the second touch electrodes 30 through the contact pad 53b, and the second connection pad 54b is disposed in the bonding area 105 to communicate with the control circuit through the second connection pad 54 b. The first trace 51, and the contact pad 53a and the first connection pad 54a electrically connected thereto are disposed on the upper surface 11 of the insulating substrate 10; the second trace 52, and the contact pad 53b and the second connection pad 54b electrically connected thereto are disposed on the lower surface 12 of the insulating substrate 10.
In order to avoid the error point caused by the active pen (not shown) touching the first connection pad 54a, as shown in fig. 3, the touch panel 100 has a conductive layer 40 on the lower surface 12 corresponding to the first connection pad 54a on the upper surface 11, and a bonding pad 54c electrically connected to the conductive layer 40 is further disposed on the upper surface 11, and the bonding pad 54c is electrically connected to the control circuit. Thus, when the active pen touch touches the first connection pad 54a of the bonding region 105, the conductive layer 40 will detect the sensing signal and transmit the corresponding sensing signal to the control circuit, which determines that no false alarm point is generated.
As shown in fig. 1 and fig. 2, the conductive layer 40 is in a grid shape, and a projection of the conductive layer on the insulating substrate 10 along a normal direction of the insulating substrate 10 surrounds each first connection pad 54a, and does not contact and overlap with the first connection pad 54 a. As shown in fig. 1, the conductive layer 40 includes an outer frame wire 41 surrounding all the first connection pads 54a and a plurality of inner frame wires 43 connected to the outer frame wire 41 and arranged at intervals, and each inner frame wire 43 is arranged between two adjacent first connection pads 54a and does not contact and overlap with the first connection pads 54 a. As shown in fig. 1, in the present embodiment, the inner frame line 43 is in an "X" shape. In the present embodiment, the outer wire 41 has a rectangular shape, and includes four outer wires 41 connected end to end in sequence. The opposite ends of the inner wire 43 are connected to the two outer wires 41. As shown in fig. 2, the shortest distance a, b, c, d, e, f between each outer wire 41 and the first connection pad 54a is greater than zero and less than 1 mm.
The pattern of the conductive layer 40 may be various and is not limited to the pattern shown in fig. 2. In an embodiment, referring to the touch panel 100 shown in fig. 4, the conductive layer 40 includes an outer frame line 41 surrounding a rectangle and a plurality of inner frame lines 43 connected to the outer frame line 41 and disposed at intervals; each of the inner wires 43 is a straight line having opposite ends that are connected to the respective opposite outer wires 41. In another embodiment, referring to the touch panel 100 shown in fig. 5, each inner wire 43 of the conductive layer 40 is a diamond lattice sequentially connected and arranged. It is understood that the pattern of the conductive layer 40 can be other various patterns as long as the outer wire 41 is ensured to surround all the first connection pads 54a, and each inner wire 43 is disposed between two adjacent first connection pads 54a and does not contact and overlap with the first connection pads 54 a.
As shown in fig. 1, in addition, the lower surface 12 of the insulating substrate 10 is further provided with a portion of the additional conductive layer 50 corresponding to the contact pad 53a on the upper surface 11 and the first trace 51 connected thereto. The projection of the additional conductive layer 50 on the insulating substrate 10 along the normal direction of the insulating substrate 10 covers the contact pad 53a and the portion of the first trace 51 connected thereto. The additional conductive layer 50 is grid-like. The additional conductive layer 50 is also electrically connected to the bond pad 54 c. Thus, when the active pen touch touches the contact pad 53a of the bonding area 105 and the first trace 51 thereof, the additional conductive layer 50 will detect the sensing signal and transmit the corresponding sensing signal to the control circuit, which determines that no error point is generated.
The material of the conductive layer 40 and the additional conductive layer 50 may be various conductive materials conventionally used in the art, such as indium tin oxide, metal mesh, nano silver wire, carbon nanotube, etc.
In the embodiment, the bonding pad 54c is disposed on the upper surface 11 of the insulating substrate 10 and beside the first connection pad 54a, and since the conductive layer 40 and the additional conductive layer 50 are disposed on the lower surface 12 of the insulating substrate 10, the conductive layer 40 and the additional conductive layer 50 need to be electrically connected to the bonding pad 54c through a via (not shown) penetrating through the insulating substrate 10.
The above embodiments are mainly described by taking the example of avoiding the erroneous touch point generated by the active pen (not shown) touching the first connection pad 54a as an example, in order to actually avoid the erroneous touch point generated by the active pen (not shown) touching the second connection pad 54b, the touch panel 100 is also provided with a conductive layer (not shown in fig. 1-3, refer to the conductive grid 60 shown in fig. 8) on the upper surface 11 corresponding to the second connection pad 54b on the lower surface 12. The arrangement and arrangement of the conductive layer may be the same as the arrangement of the conductive layer 40, and the projection of the conductive layer on the insulating substrate 10 along the normal direction of the insulating substrate 10 surrounds each second connection pad 54b, and does not contact and overlap with the second connection pad 54 b.
In an embodiment, referring to fig. 6 and 7, in the touch panel 200, not only the conductive layer 40 corresponding to the first connection pad 54a of the bonding area 105 but also the conductive grid 60 corresponding to the second trace 52 beside the bonding area 105 are disposed on the lower surface 12 of the insulating substrate 10.
The conductive mesh 60 is disposed on the upper surface 11 of the insulating substrate 10, and a projection on the insulating substrate 10 along a normal direction of the insulating substrate 10 covers a portion of the second trace 52, as shown in fig. 6. The conductive mesh 60 is electrically connected to the control circuit to transmit the sensing signal to the control circuit.
In one embodiment, referring to fig. 8 and 9, in the touch panel 300, not only the conductive layer 40 corresponding to the first connection pad 54a of the bonding region 105, the second connection pad 54b corresponding to the second connection pad 105 in the bonding region 105, and the second trace 52 connected to the second connection pad 54b near the bonding region 105, but also the conductive mesh 60 are disposed on the lower surface 12 of the insulating substrate 10.
The conductive mesh 60 is disposed on the upper surface 11 of the insulating substrate 10, and surrounds each of the second connection pads 54b in a projection on the insulating substrate 10 along a normal direction of the insulating substrate 10 without contact overlapping with the second connection pads 54b, as shown in fig. 8. The projection of the conductive grid 60 on the insulating substrate 10 along the normal direction of the insulating substrate 10 may also overlap with a portion of the second trace 52, as shown in fig. 8. It is understood that the conductive mesh 60 is not limited to the pattern shown in fig. 8, but may have other shapes as long as it is ensured that its projection on the insulating substrate 10 along the normal direction of the insulating substrate 10 surrounds each of the second connection pads 54b without contact overlapping with the second connection pads 54 b.
Referring to the touch display device 500 shown in fig. 10, the touch display device 500 includes a display panel 210, the touch panel 100 disposed on the display panel 210, and a transparent cover 220 disposed on a side of the touch panel 100 away from the display panel 210. An optically transparent adhesive 230 may be disposed between the touch panel 100 and the transparent cover 220, and an optically transparent adhesive 230 may also be disposed between the touch panel 100 and the display panel 210. The touch panel may be any one of the touch panels described above, and is not limited to the touch panel 100. The touch display device 500 may be a mobile phone, a tablet computer, a notebook computer, etc. The display panel 210 may be a liquid crystal display panel, an OLED display panel, a micro LED display panel, or the like.
The above embodiments are only intended to illustrate the technical solution of the present invention and not to limit, and the up, down, left and right directions shown in the drawings are only for convenience of understanding, although the present invention is described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention.
Claims (9)
1. A touch panel, the touch panel defining a touch area and a border area surrounding the touch area, the touch panel comprising:
an insulating substrate including an upper surface and a lower surface disposed opposite to each other;
a plurality of first touch electrodes on the upper surface;
the second touch control electrodes are positioned on the lower surface, and the first touch control electrodes and the second touch control electrodes are crossed in an insulating mode and positioned in the touch control area;
a plurality of first traces disposed on the insulating substrate and located in the frame region, wherein one end of each first trace is connected to the first touch electrode, and the other end of each first trace is connected to a first connection pad disposed on the upper surface;
a plurality of second traces disposed on the insulating substrate and located in the frame area, wherein one end of each second trace is connected to the second touch electrode, the other end of each second trace is connected to a second connection pad, and the first connection pad and the second connection pad define a bonding area located in the frame area;
a latticed conducting layer is arranged on the lower surface, and the projection of the conducting layer on the insulating substrate along the normal direction of the insulating substrate surrounds each first connecting pad and is not in contact and overlapped with the first connecting pad;
the insulating substrate is provided with a conductive layer on the lower surface corresponding to the first connecting pad on the upper surface, the upper surface is also provided with a bonding pad electrically connected with the conductive layer, and the bonding pad is electrically connected with a control circuit;
when an active pen touch touches the first connection pad of the bonding area, the conductive layer detects a sensing signal and transmits the corresponding sensing signal to the control circuit.
2. The touch panel of claim 1, wherein the conductive layer comprises an outer frame line surrounding all the first connection pads and a plurality of inner frame lines connected to the outer frame line and spaced apart from each other, and each inner frame line is disposed between two adjacent first connection pads and does not contact and overlap with the first connection pads.
3. The touch panel of claim 2, wherein the shortest distance between the outer wire and the first connection pad is greater than zero and less than 1 mm.
4. The touch panel as recited in claim 1, wherein each of the first traces is connected to a first touch electrode via a contact pad, the contact pad is disposed in the border area and on the upper surface, and the lower surface further includes an additional conductive layer corresponding to the contact pad.
5. The touch panel of claim 4, wherein the additional conductive layer is in a grid shape, and a projection of the additional conductive layer on the insulating substrate along a normal direction of the insulating substrate covers the contact pad and a portion of the first trace connected thereto.
6. The touch panel of claim 1, wherein a conductive grid is further disposed on the second trace corresponding to the outside of the bonding area, the second trace is disposed on the lower surface, the conductive grid is disposed on the upper surface, and a projection of the conductive grid on the insulating substrate along a normal direction of the insulating substrate covers a portion of the second trace.
7. The touch panel of claim 1, wherein a conductive grid is disposed on the lower surface corresponding to the second connection pads in the bonding area, the conductive grid is disposed on the upper surface, and a projection of the conductive grid onto the insulating substrate along a normal direction of the insulating substrate surrounds each second connection pad without overlapping with the second connection pad.
8. The touch panel as claimed in claim 7, wherein the projection of the conductive grid on the insulating substrate along the normal direction of the insulating substrate further covers a portion of the second trace.
9. A touch display device comprising a display panel and a touch panel provided on the display panel, the touch panel being the touch panel according to any one of claims 1 to 8.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910317974.5A CN110045871B (en) | 2019-04-19 | 2019-04-19 | Touch panel and touch display device using same |
| TW108115079A TWI699680B (en) | 2019-04-19 | 2019-04-30 | Touch panel and touch display device using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910317974.5A CN110045871B (en) | 2019-04-19 | 2019-04-19 | Touch panel and touch display device using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110045871A CN110045871A (en) | 2019-07-23 |
| CN110045871B true CN110045871B (en) | 2022-06-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910317974.5A Active CN110045871B (en) | 2019-04-19 | 2019-04-19 | Touch panel and touch display device using same |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110045871B (en) |
| TW (1) | TWI699680B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111309175B (en) * | 2020-01-19 | 2022-07-29 | 业成科技（成都）有限公司 | Touch panel, preparation method thereof and touch display device |
| CN111666000B (en) * | 2020-07-30 | 2023-07-18 | 京东方科技集团股份有限公司 | Display panel, manufacturing method thereof and display device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107390938A (en) * | 2017-08-02 | 2017-11-24 | 业成科技（成都）有限公司 | Touch-screen and its manufacture method |
| EP3321784A1 (en) * | 2015-07-09 | 2018-05-16 | BOE Technology Group Co., Ltd. | Touch display panel and manufacturing method therefor, and touch display device |
| CN108228002A (en) * | 2018-02-11 | 2018-06-29 | 业成科技（成都）有限公司 | Touch panel and apply its touch control display apparatus |
| CN108446057A (en) * | 2018-03-05 | 2018-08-24 | 业成科技（成都）有限公司 | Touch panel and touch control display apparatus |
| CN108803952A (en) * | 2018-05-24 | 2018-11-13 | 业成科技（成都）有限公司 | Touch panel and touch control display apparatus |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101469487B1 (en) * | 2012-09-18 | 2014-12-05 | 엘지디스플레이 주식회사 | Organic Emitting Display Device |
| TW201602853A (en) * | 2014-07-08 | 2016-01-16 | 勝華科技股份有限公司 | Touch display device |
| TW201624213A (en) * | 2014-12-19 | 2016-07-01 | 中華映管股份有限公司 | Touch display device and noise-shielding method of touch display device |
| TWI536074B (en) * | 2015-03-31 | 2016-06-01 | 業鑫科技顧問股份有限公司 | Electronic connection structure and array substrate |
-
2019
- 2019-04-19 CN CN201910317974.5A patent/CN110045871B/en active Active
- 2019-04-30 TW TW108115079A patent/TWI699680B/en not_active IP Right Cessation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3321784A1 (en) * | 2015-07-09 | 2018-05-16 | BOE Technology Group Co., Ltd. | Touch display panel and manufacturing method therefor, and touch display device |
| CN107390938A (en) * | 2017-08-02 | 2017-11-24 | 业成科技（成都）有限公司 | Touch-screen and its manufacture method |
| CN108228002A (en) * | 2018-02-11 | 2018-06-29 | 业成科技（成都）有限公司 | Touch panel and apply its touch control display apparatus |
| CN108446057A (en) * | 2018-03-05 | 2018-08-24 | 业成科技（成都）有限公司 | Touch panel and touch control display apparatus |
| CN108803952A (en) * | 2018-05-24 | 2018-11-13 | 业成科技（成都）有限公司 | Touch panel and touch control display apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| TW202040339A (en) | 2020-11-01 |
| CN110045871A (en) | 2019-07-23 |
| TWI699680B (en) | 2020-07-21 |
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