CN111158523B - Touch panel and display device - Google Patents
Touch panel and display device Download PDFInfo
- Publication number
- CN111158523B CN111158523B CN201911397117.7A CN201911397117A CN111158523B CN 111158523 B CN111158523 B CN 111158523B CN 201911397117 A CN201911397117 A CN 201911397117A CN 111158523 B CN111158523 B CN 111158523B
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- cover plate
- layer
- thickness
- touch panel
- touch sensing
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- 239000003292 glue Substances 0.000 claims abstract description 38
- 239000010410 layer Substances 0.000 claims description 73
- 230000003287 optical effect Effects 0.000 claims description 16
- 239000012790 adhesive layer Substances 0.000 claims description 11
- 239000011241 protective layer Substances 0.000 claims description 8
- 239000004973 liquid crystal related substance Substances 0.000 claims description 6
- 238000004880 explosion Methods 0.000 abstract description 7
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 239000004713 Cyclic olefin copolymer Substances 0.000 description 2
- -1 Polyethylene terephthalate Polymers 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 150000001925 cycloalkenes Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000002346 layers by function Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012788 optical film Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000010897 surface acoustic wave method Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
- Liquid Crystal (AREA)
Abstract
The invention provides a touch panel and a display device. The touch panel comprises a touch sensing layer and a cover plate, and the edge of the cover plate is attached to the touch sensing layer through a frame glue frame. The thickness of the frame glue is greater than 0 and less than or equal to 0.2 mm, and the vacuum degree of the closed space formed by combining the cover plate, the touch sensing layer and the frame glue is any value in the range of 80-95% of normal pressure. According to the embodiment of the invention, the parameters of the cover plate and the frame paste of the touch sensing layer are controlled, and part of air is pumped and regulated at the same time, so that the interior of a closed space formed by combining the cover plate, the touch sensing layer and the frame glue is in a relatively stable state, and the problem of explosion points of the frame paste is solved.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a touch panel and a display device.
Background
Touch screens are classified into four types according to the working principle and the medium for transmitting information, namely a resistive touch screen, an infrared touch screen, a capacitive touch screen and a surface acoustic wave touch screen. The capacitive touch screen generally needs to attach a touch sensing layer to a protective layer, and then attach a cover plate to an upper frame of the touch sensing layer to form a touch panel. However, if the parameter control of the frame paste is not good, the problem of no touch or poor touch explosion point will occur. Therefore, improvement of this defect is required.
Disclosure of Invention
The embodiment of the invention provides a touch panel, which is used for solving the technical problem that no touch or poor touch explosion point occurs due to poor parameter control of a cover plate and a touch sensing layer frame.
The embodiment of the invention provides a touch panel which comprises a touch sensing layer and a cover plate, wherein the edge of the cover plate is adhered to the touch sensing layer through a frame glue frame. The thickness of the frame glue is greater than 0 and less than or equal to 0.2 mm, and the vacuum degree of the closed space formed by combining the cover plate, the touch sensing layer and the frame glue is any value in the range of 80-95% of normal pressure.
Further, the thickness of the cover plate is less than or equal to 3 millimeters.
Further, the touch sensing layer is a capacitive touch sensing module.
Further, the capacitive touch sensing module comprises a driving electrode and a receiving electrode, wherein the driving electrode is connected with the receiving electrode through a first optical adhesive layer, and the receiving electrode is arranged between the driving electrode and the cover plate.
Further, the touch panel further comprises a protective layer, and the driving electrode is connected with the protective layer through a second optical adhesive layer.
Further, a perpendicular distance between a projection of the driving electrode on the first optical adhesive layer and a projection of the receiving electrode on the first optical adhesive layer is in a range of 0.5 mm to 0.9 mm.
Further, the width of the driving electrode is greater than 0 and less than or equal to 5.4 millimeters.
The embodiment of the invention provides a display device, which comprises the touch panel and a display module arranged below the touch panel.
Further, the display module comprises a liquid crystal display panel and a backlight module.
Further, the display module is an OLED display panel.
The beneficial effects are that: according to the touch panel provided by the embodiment of the invention, the thickness of the frame glue is limited to be within the range of more than 0 and less than or equal to 0.2 mm by controlling the parameters of the cover plate and the touch sensing layer frame paste, and meanwhile, part of air is pumped, so that the inside of a closed space formed by combining the cover plate, the touch sensing layer and the frame glue is in a relatively stable state, and the problem of explosion points of the frame paste is solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a touch panel according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a touch principle of a touch panel according to an embodiment of the invention.
Fig. 3 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
As shown in fig. 1, the structural schematic diagram of the touch panel provided by the embodiment of the invention, from which each component of the invention and the relative positional relationship between each component can be intuitively seen, the touch panel includes a touch sensing layer 101 and a cover plate 102, and the edge of the cover plate 102 is adhered to the touch sensing layer 101 through a frame adhesive 103. Wherein the thickness of the frame glue 103 is greater than 0 and less than or equal to 0.2 mm, and the vacuum degree of the sealed space 104 formed by combining the cover plate 102, the touch sensing layer 101 and the frame glue 103 is any value in the range of 80% to 95% of normal pressure.
The sealed space 104 is an air layer, and the air pressure of the air layer is any value in the range of 80% to 95% of the normal pressure. The thickness of the frame glue 103 corresponds to the thickness of the air layer, that is, the thickness of the air layer ranges from greater than 0 to less than or equal to 0.2 mm.
The ratio of the thickness of the air layer to the thickness of the cover plate 102 is one to six, that is, the thickness of the air layer multiplied by six may be converted into the thickness of the cover plate 102, for example, the thickness of the air layer is 0.1 mm, and the thickness of the cover plate 102 is 0.6 mm. In this embodiment, by controlling the thickness of the air layer and simultaneously pumping and adjusting part of the air, the closed space 104 formed by combining the cover plate 102 with the touch sensing layer 101 and the frame glue 103 can reach a relatively stable state, so that the problem of no touch or poor touch explosion point after frame pasting is avoided.
In one embodiment, the touch sensing layer 101 has a square structure, however, in other embodiments, the touch sensing layer 101 may have other shapes, such as a circle, an ellipse, etc., and is not limited to the square structure.
In one embodiment, the touch sensing layer 101 is a capacitive touch sensing module. The capacitive touch sensing module comprises a driving electrode 1011 and a receiving electrode 1012, wherein the driving electrode 1011 and the receiving electrode 1012 are connected through a first optical adhesive layer 1013, and the receiving electrode 1012 is disposed between the driving electrode 1011 and the cover plate 102.
In one embodiment, the cover plate 102 may be made using transparent glass, film, plastic, flexible material, etc., such as: PET (Polyethylene terephthalate), polyethylene terephthalate (COP) board, cycloolefin (cyclic olefin polymers) board, polyimide (PI) board, polycarbonate (PC) board or COC (cyclic olefin copolymers) board, etc. for protecting the internal touch sensing layer and the display module, preventing damage to the touch sensing layer and the display module during touch input.
In one embodiment, the thickness of the cover plate 102 is less than or equal to 3 millimeters.
In one embodiment, the frame glue 103 may be a tape or other adhesive material, such as a double sided tape, and generally the adhesive strength of the frame glue 103 is greater than that of the optical glue, so as to firmly fix the cover plate 102 and the touch sensing layer 101.
In one embodiment, the frame glue 103 is a square-shaped adhesive tape, however, in other embodiments, the frame glue 103 may have other shapes, such as a circle, an ellipse, etc., and not limited to the square shape, and the shape of the frame glue 103 corresponds to the shape of the cover plate 102 and the shape of the touch sensing layer 101 one by one.
In one embodiment, the touch panel further includes a protective layer 105, and the driving electrode 1011 is connected to the protective layer 105 through a second optical adhesive layer 106. The protective layer 105 is used to protect the driving electrode 1011 from the underlying device.
As shown in fig. 2, the schematic touch principle of the touch panel provided by the embodiment of the invention includes a touch sensing layer and a cover plate 204, wherein an edge of the cover plate 204 is adhered to the touch sensing layer through a frame glue (not shown in the figure). Wherein the thickness of the frame glue is greater than 0 and less than or equal to 0.2 mm, and the vacuum degree of the sealed space formed by combining the cover plate 204, the touch sensing layer and the frame glue (not shown in the figure) is any value in the range of 80% to 95% of normal pressure.
The closed space is an air layer 205, and the air pressure of the air layer 205 is any value in the range of 80% to 95% of the normal pressure. The thickness of the frame glue (not shown) corresponds to the thickness of the air layer 205, i.e., the thickness of the air layer 205 ranges from greater than 0 to less than or equal to 0.2 mm.
The ratio of the thickness of the air layer 205 to the thickness of the cover plate 204 is one to six, that is, the thickness of the air layer 205 multiplied by six may be converted into the thickness of the cover plate 204, for example, the thickness of the air layer is 0.1 mm, and the thickness of the cover plate 102 is 0.6 mm.
In one embodiment, the thickness of the air layer 205 is multiplied by six to a thickness value of the cover plate 204, and the thickness value of the cover plate 204 is added to obtain a sum value, and the sum value should be less than or equal to 4.2 mm.
It should be noted that the touch sensing layer is a capacitive touch sensing module. The capacitive touch sensing module comprises a driving electrode 201 and a receiving electrode 202, wherein the driving electrode 201 is connected with the receiving electrode 202 through a first optical adhesive layer 203, and the receiving electrode 202 is arranged between the driving electrode 201 and the cover plate 204.
Wherein the driving electrode 201 is used for emitting a low-voltage high-frequency signal to be projected to the receiving electrode 202, so as to form a stable current. When a human body touches the capacitive touch panel, the human body is grounded, the finger and the capacitive touch panel form an equivalent capacitance, and a high-frequency signal can flow into a ground wire through the equivalent capacitance, so that the charge quantity received by the receiving end is reduced, and when the finger is closer to the transmitting end, the charge reduction is more obvious, and finally, the touched point is determined according to the current intensity received by the receiving end.
It should be noted that, in order to implement multi-point touch, electrodes of mutual capacitance need to be added, in short, a screen is divided into blocks, a group of mutual capacitance modules are arranged in each area and work independently, so that touch conditions of each area can be detected independently, and after processing, multi-point touch is implemented simply.
Specifically, when a finger touches the capacitive touch panel, coupling between two electrodes near the touch point is affected, thereby changing the capacitance between the two electrodes. When the mutual capacitance is detected, all driving electrodes send out excitation signals in sequence, and all receiving electrodes receive signals simultaneously, so that the capacitance value of the junction of all driving electrodes and receiving electrodes, namely the capacitance value of the two-dimensional plane of the whole capacitive touch panel, can be obtained. According to the two-dimensional capacitance variation data of the capacitive touch panel, the coordinates of each touch point can be calculated. Thus, even if there are a plurality of touch points on the panel, the true coordinates of each touch point can be calculated.
In one embodiment, the perpendicular distance S1 between the projection of the driving electrode 201 on the first optical glue layer 203 and the projection of the receiving electrode 202 on the first optical glue layer 203 ranges from 0.5 mm to 0.9 mm, in particular, the perpendicular distance S1 between the projection of the driving electrode 201 on the first optical glue layer 203 and the projection of the receiving electrode 202 on the first optical glue layer 203 is 0.7 mm.
In one embodiment, the width S2 of the driving electrode 201 is greater than 0 and less than or equal to 5.4 millimeters.
As shown in fig. 3, the structural schematic diagram of the display device provided by the embodiment of the present invention, from which each component of the present invention and the relative positional relationship between each component can be intuitively seen, includes the above-mentioned touch panel 301, and the display module 302 disposed under the touch panel 301.
The touch panel 301 includes a touch sensing layer and a cover plate, and an edge of the cover plate is attached to the touch sensing layer through a frame glue frame. The thickness of the frame glue is greater than 0 and less than or equal to 0.2 mm, and the vacuum degree of the closed space formed by combining the cover plate, the touch sensing layer and the frame glue is any value in the range of 80-95% of normal pressure.
The sealed space is an air layer, and the air pressure of the air layer is any value in the range of 80% to 95% of the normal pressure. The thickness of the frame glue corresponds to the thickness of the air layer, namely the thickness range of the air layer is more than 0 and less than or equal to 0.2 mm.
The ratio of the thickness of the air layer to the thickness of the cover plate is one to six, that is, the thickness of the air layer multiplied by six can be converted into the thickness of the cover plate, for example, the thickness of the air layer is 0.1 mm, and the thickness of the cover plate is 0.6 mm. According to the embodiment, the thickness of the air layer is controlled, and meanwhile, part of air is pumped, so that a closed space formed by combining the cover plate, the touch sensing layer and the frame glue reaches a relatively stable state, and the problem that no touch control or poor touch control explosion point exists after frame pasting is avoided.
In one embodiment, the display module 302 includes a liquid crystal display panel and a backlight module.
Specifically, the liquid crystal display panel includes first and second substrates disposed opposite to each other, and a liquid crystal layer (neither of which is shown) between the first and second substrates. The backlight module is used for providing plane light required by the display picture of the liquid crystal display panel. The backlight module comprises a back plate, a reflecting sheet, a light source, a light guide plate, an optical film and other conventional components (not shown).
In one embodiment, the display module 302 is an OLED display panel, which is a self-luminous device, so that a backlight module is not required. The OLED display panel comprises a substrate, a buffer layer, a driving circuit layer, an insulating layer, a planarization layer and a light-emitting functional layer (all not shown). The specific structure is not described here in detail.
The display device provided by the embodiment of the invention is an electronic device with a touch display function, such as a smart phone, a computer, a game machine, a television and the like.
In summary, according to the touch panel provided by the embodiment of the invention, the thickness of the frame glue is limited to be within a range of more than 0 and less than or equal to 0.2 mm by controlling the parameters of the cover plate and the touch sensing layer frame paste, and meanwhile, part of air is pumped and regulated, so that the inside of a closed space formed by combining the cover plate, the touch sensing layer and the frame glue reaches a relatively stable state, and the technical problem that no touch or poor touch explosion point occurs due to poor parameter control of the cover plate and the touch sensing layer frame paste in the touch panel in the prior art is solved.
The touch panel and the display device provided by the embodiment of the invention are described in detail. It should be understood that the exemplary embodiments described herein are to be considered merely descriptive for aiding in the understanding of the method of the present invention and its core concepts and not for limiting the invention.
Claims (10)
1. The touch panel is characterized by comprising a touch sensing layer and a cover plate, wherein the edge of the cover plate is attached to the touch sensing layer through a frame glue frame;
the thickness of the frame glue is greater than 0 and less than or equal to 0.2 mm, the airtight space formed by combining the cover plate, the touch sensing layer and the frame glue is an air layer, partial air is pumped into the air layer, the vacuum degree of the air layer is any value in the range of 80-95% of normal pressure, the thickness of the air layer is equal to the thickness of the frame glue, and the ratio of the thickness of the air layer to the thickness of the cover plate is one to six.
2. The touch panel of claim 1, wherein the cover plate has a thickness of less than or equal to 3 millimeters.
3. The touch panel of claim 1, wherein the touch sensing layer is a capacitive touch sensing module.
4. The touch panel of claim 3, wherein the capacitive touch sensing module comprises a driving electrode and a receiving electrode, the driving electrode and the receiving electrode are connected through a first optical adhesive layer, and the receiving electrode is disposed between the driving electrode and the cover plate.
5. The touch panel of claim 4, further comprising a protective layer, wherein the drive electrode is coupled to the protective layer via a second optical adhesive layer.
6. The touch panel of claim 4, wherein a perpendicular distance between a projection of the driving electrode on the first optical adhesive layer and a projection of the receiving electrode on the first optical adhesive layer is in a range of 0.5 mm to 0.9 mm.
7. The touch panel according to claim 4, wherein the width of the driving electrode is greater than 0 and less than or equal to 5.4 millimeters.
8. A display device, comprising:
the touch panel according to any one of claims 1 to 7; and
and the display module is arranged below the touch panel.
9. The display device of claim 8, wherein the display module comprises a liquid crystal display panel and a backlight module.
10. The display device of claim 8, wherein the display module is an OLED display panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911397117.7A CN111158523B (en) | 2019-12-30 | 2019-12-30 | Touch panel and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911397117.7A CN111158523B (en) | 2019-12-30 | 2019-12-30 | Touch panel and display device |
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| Publication Number | Publication Date |
|---|---|
| CN111158523A CN111158523A (en) | 2020-05-15 |
| CN111158523B true CN111158523B (en) | 2023-12-26 |
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| CN201911397117.7A Active CN111158523B (en) | 2019-12-30 | 2019-12-30 | Touch panel and display device |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111796714A (en) * | 2020-06-19 | 2020-10-20 | 惠州市华星光电技术有限公司 | Touch display device |
| CN112965631A (en) * | 2021-03-18 | 2021-06-15 | 南京华睿川电子科技有限公司 | Capacitive touch screen supporting writing |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101322951B1 (en) * | 2009-03-27 | 2013-10-29 | 엘지디스플레이 주식회사 | Organic Light Emitting Display Device |
| JP2013196531A (en) * | 2012-03-22 | 2013-09-30 | Japan Display Inc | Touch panel and display device with touch panel |
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- 2019-12-30 CN CN201911397117.7A patent/CN111158523B/en active Active
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|---|---|---|---|---|
| CN109445645A (en) * | 2018-12-28 | 2019-03-08 | 惠州市华星光电技术有限公司 | Touch screen and display device |
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| CN110333630A (en) * | 2019-02-19 | 2019-10-15 | 广州视源电子科技股份有限公司 | Display assembly, display device and assembling method thereof |
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