CN114489362A - Touch display device and manufacturing method thereof - Google Patents
Touch display device and manufacturing method thereof Download PDFInfo
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- CN114489362A CN114489362A CN202011156767.5A CN202011156767A CN114489362A CN 114489362 A CN114489362 A CN 114489362A CN 202011156767 A CN202011156767 A CN 202011156767A CN 114489362 A CN114489362 A CN 114489362A
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- flexible substrate
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- 238000000034 method Methods 0.000 claims description 19
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- 239000011540 sensing material Substances 0.000 claims description 7
- 239000011241 protective layer Substances 0.000 claims description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
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- 230000035945 sensitivity Effects 0.000 abstract description 7
- 230000008859 change Effects 0.000 abstract description 4
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 5
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- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- -1 polyethylene terephthalate Polymers 0.000 description 3
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
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Images
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
-
- 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
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
Abstract
The invention provides a touch display device and a manufacturing method thereof. The flexible substrate has a first surface and a second surface opposite to each other. The light emitting structure layer is configured on the first surface of the flexible substrate. The flexible touch sensing layer is disposed on the second surface of the flexible substrate. The invention replaces the existing insulating layer with the flexible substrate, thereby reducing the production cost and the thickness of the whole touch display device, and enabling the flexible touch sensing layer to more effectively control the impedance change so as to improve the touch sensitivity.
Description
Technical Field
The present disclosure relates to touch devices, and particularly to a touch display device and a method for manufacturing the same.
Background
With the technology changing day by day, no matter manufacturers of household appliances or vehicle-mounted products, the trend of replacing the traditional mechanical keys with the capacitive touch interface as a new generation input interface is provided. Currently, the touch display device is designed such that the touch sensing layer and the light emitting diode are disposed on the same side of the substrate, and the touch sensing layer and the light emitting diode are isolated from each other by the insulating layer. However, when the thickness of the insulating layer is too thick or the entire thickness is not uniform, the sensed surface capacitance response tends to be weak. At this time, the touch sensing Integrated Circuit (IC) must enhance the sensitivity of touch sensing and accelerate the tracking and positioning speed of the sensing points. That is, the touch sensing integrated circuit is easily interfered when analyzing the contact capacitance, and the voltage control must be precise, otherwise the touch detection positioning is not sensitive, which increases the difficulty of the design of the touch sensing integrated circuit.
Disclosure of Invention
The invention is directed to a touch display device, which has the characteristics of better touch sensitivity, light weight and thinness and can reduce the production cost.
The invention is directed to a method for manufacturing a touch display device, which is used for manufacturing the touch display device.
According to an embodiment of the invention, the touch display device includes a flexible substrate, a light emitting structure layer and a flexible touch sensing layer. The flexible substrate has a first surface and a second surface opposite to each other. The light emitting structure layer is configured on the first surface of the flexible substrate. The flexible touch sensing layer is disposed on the second surface of the flexible substrate.
In an embodiment of the invention, the flexible touch sensing layer includes a mesh metal layer or a flexible conductive silver paste layer.
In an embodiment of the invention, the light emitting structure layer includes a plurality of nanoscale light emitting elements, and each of the nanoscale light emitting elements includes a light emitting diode.
In an embodiment of the invention, the flexible touch sensing layer includes a plurality of touch sensing portions, and the touch sensing portions are disposed on the flexible substrate separately from each other and expose a portion of the second surface.
In an embodiment of the invention, the light emitting structure layer includes a plurality of light emitting structure portions, and the light emitting structure portions are separately disposed on the flexible substrate and expose a portion of the first surface.
In an embodiment of the invention, the flexible touch sensing layer continuously covers the second surface of the flexible substrate.
In an embodiment of the invention, the light emitting structure layer includes a plurality of light emitting structure portions, and the light emitting structure portions are separately disposed on the flexible substrate and expose a portion of the first surface.
In an embodiment of the invention, the light emitting structure layer continuously covers the first surface of the flexible substrate.
In an embodiment of the invention, the touch display device further includes a protection layer disposed on the light emitting structure layer. The light emitting structure layer is positioned between the protective layer and the flexible substrate.
In an embodiment of the invention, the touch display device further includes a cover plate disposed on the flexible touch sensing layer. The flexible touch sensing layer is located between the cover plate and the flexible substrate.
According to an embodiment of the invention, a method for manufacturing a touch display device comprises the following steps. A flexible substrate and a flexible touch sensing material layer disposed on the flexible substrate are provided. The flexible substrate and the flexible touch sensing material layer are subjected to a monomer process to form a flexible substrate and a flexible touch sensing layer disposed on the flexible substrate. And performing a preheating process on the flexible substrate and the flexible touch sensing layer. And placing the light emitting structure layer, the flexible substrate subjected to the preheating process and the flexible touch sensing layer into a mold. And performing a bonding procedure on the light emitting structure layer, the flexible substrate and the flexible touch sensing layer to form the touch display device, wherein the light emitting structure layer and the flexible touch sensing layer are respectively located on the first surface and the second surface of the flexible substrate.
In view of the above, in the design of the touch display device of the present invention, the flexible touch sensing layer and the light emitting structure layer are respectively located on two opposite sides of the flexible substrate. Compared with the prior art, the invention replaces the existing insulating layer with the flexible substrate, thereby reducing the production cost and the thickness of the whole touch display device, and enabling the flexible touch sensing layer to control the impedance change more effectively so as to improve the touch sensitivity.
Drawings
Fig. 1A is a schematic cross-sectional view of a touch display device according to an embodiment of the invention;
FIG. 1B is a schematic bottom view of the touch display device of FIG. 1A;
FIG. 1C is a schematic top view of the touch display device of FIG. 1A;
FIG. 2 is a schematic cross-sectional view of a touch display device according to another embodiment of the invention;
FIG. 3 is a schematic cross-sectional view of a touch display device according to another embodiment of the invention;
fig. 4 is a flowchart of a method for manufacturing a touch display device according to an embodiment of the invention.
Description of the reference numerals
100a, 100b, 100c touch display devices;
110 flexible base plate;
112, a first surface;
114: a second surface;
120a, 120c, a light emitting structure layer;
121: a nanoscale light-emitting element;
122, a light emitting structure part;
130a, 130b, 130c flexible touch sensing layer;
132 touch sensing part;
140, a protective layer;
150 is a cover plate;
s10, S20, S30, S40 and S50.
Detailed Description
Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings and the description to refer to the same or like parts.
Fig. 1A is a schematic cross-sectional view of a touch display device according to an embodiment of the invention. Fig. 1B is a schematic bottom view of the touch display device of fig. 1A. Fig. 1C is a schematic top view of the touch display device of fig. 1A.
Referring to fig. 1A, in the present embodiment, a touch display device 100a includes a flexible substrate 110, a light emitting structure layer 120a, and a flexible touch sensing layer 130 a. The flexible substrate 110 has a first surface 112 and a second surface 114 opposite to each other. The light emitting structure layer 120a is disposed on the first surface 112 of the flexible substrate 110, and the flexible touch sensing layer 130a is disposed on the second surface 114 of the flexible substrate 110. That is, the light emitting structure layer 120a and the flexible touch sensing layer 130a are disposed on different sides of the flexible substrate 110.
In detail, the flexible substrate 110 of the present embodiment is made of, for example, a plastic substrate such as polyethylene terephthalate (PET) or Polyimide (PI); alternatively, but not limited to, an optical plastic material such as Cyclo Olefin Polymer (COP). As long as it is flexible and made of insulating material, it can be used as the flexible substrate 110 of the present embodiment.
Particularly, referring to fig. 1B, the flexible touch sensing layer 130a of the present embodiment is, for example, a Mesh (Mesh) metal layer, but not limited thereto. In another embodiment, the flexible touch sensing layer 130a may also be a flexible conductive silver paste layer, for example. More specifically, referring to fig. 1A and fig. 1B, the flexible touch sensing layer 130a of the present embodiment includes a plurality of touch sensing portions 132, wherein the touch sensing portions 132 are disposed on the flexible substrate 110 separately from each other and expose a portion of the second surface 114. That is, the flexible touch sensing layer 130a does not continuously cover the second surface 114 of the flexible substrate 110. The flexible touch sensing layer 130a has the advantages of low resistance and thin conductive layer, so that the touch display device 100a has high touch sensitivity and fast response speed.
Referring to fig. 1A and fig. 1C, the light emitting structure layer 120a of the present embodiment includes a plurality of nanoscale light emitting elements 121, wherein each of the nanoscale light emitting elements 121 is, for example, a light emitting diode. The light emitting structure layer 120a includes a plurality of light emitting structure portions 122, wherein the light emitting structure portions 122 are disposed on the flexible substrate 110 separately from each other and expose a portion of the first surface 112. That is, the light emitting structure layer 120a does not continuously cover the first surface 112 of the flexible substrate 110. Here, the arrangement of the nano-scale light emitting elements 121 is not limited, and may be a matrix arrangement or an irregular arrangement, which is not limited herein.
In addition, referring to fig. 1A, the touch display device 100a of the present embodiment further includes a protection layer 140, wherein the protection layer 140 is disposed on the light emitting structure layer 120a, and the light emitting structure layer 120a is located between the protection layer 140 and the flexible substrate 110. Here, the protection layer 140 is used to protect the light emitting structure layer 120a, wherein the material of the protection layer 140 is, for example, polyethylene terephthalate (PET), Polyethylene (PE), polyvinyl chloride (PVC), biaxially oriented polypropylene (OPP), a high light transmittance optical film, a polymer film material, plastic, glass, and the like, but not limited thereto. In addition, the touch display device 100a of the present embodiment further includes a cover plate 150, wherein the cover plate 150 is disposed on the flexible touch sensing layer 130a, and the flexible touch sensing layer 130a is located between the cover plate 150 and the flexible substrate 110. Here, the cover plate 150 is used to protect the flexible touch sensing layer 130a, wherein the material of the cover plate 150 includes, but is not limited to, polymethyl methacrylate (PMMA), a composite material of PMMA and polymethyl methacrylate (PC), glass, and plastic.
In short, the flexible touch sensing layer 130a and the light emitting structure layer 120a of the present embodiment are respectively located on two opposite sides of the flexible substrate 110, i.e., the flexible touch sensing layer 130a and the light emitting structure layer 120a are located on different sides of the flexible substrate 110. Compared with the prior art, the flexible substrate 110 is used to replace the conventional insulating layer in the present embodiment, so that the insulating layer is not required to be disposed to block the conduction. Therefore, not only the production cost and the thickness of the entire touch display device 100a can be reduced, but also the flexible touch sensing layer 130a can control the impedance change more effectively, so as to improve the touch sensitivity. Furthermore, the flexible substrate 110 and the flexible touch sensing layer 130a of the present embodiment are flexible, i.e., bendable. In addition, the flexible touch sensing layer 130a and the light emitting structure layer 120a may be respectively driven by different driving chips, so as to improve the flexibility of the touch display device 100 a.
In application, the touch display device 100a of the present embodiment can be applied to function keys of a home appliance, such as an on/off key; or function keys of the vehicle-mounted product, such as an answering key, a high beam and low beam indicator light and the like. When the flexible touch sensing layer 130a of the touch display device 100a is touched and slid by a finger, the nano-scale light emitting element 121 of the light emitting structure layer 120a is illuminated or lighted up for being displayed to the user.
It should be noted that the following embodiments follow the reference numerals and parts of the contents of the foregoing embodiments, wherein the same reference numerals are used to indicate the same or similar elements, and the description of the same technical contents is omitted. For the description of the omitted parts, reference may be made to the foregoing embodiments, and the following embodiments will not be repeated.
Fig. 2 is a schematic cross-sectional view of a touch display device according to another embodiment of the invention. Referring to fig. 1A and fig. 2, the touch display device 100b of the present embodiment is similar to the touch display device 100a of fig. 1A, and the difference between the two devices is: in the present embodiment, the flexible touch sensing layer 130b of the touch display device 100b continuously covers the second surface 114 of the flexible substrate 110. At this time, the light emitting structure portions 122a of the light emitting structure layer 120a are disposed on the flexible substrate 110 separately from each other, and a portion of the first surface 112 is exposed. That is, the light emitting structure layer 120a does not continuously cover the first surface 112 of the flexible substrate 110. The touch display device 100b can be applied to function keys of household appliances, or related touch display intelligent touch switches of photoelectric and communication lamps, remote controllers/keyboards/sound panels, hotel room central control systems and medical equipment control panels. When a user lightly touches the touch control device with a finger or wakes up the touch control device with a gesture, the switch or the signal is started through circuit conversion to finish the technical sense brought by various key light-emitting and touch control.
Fig. 3 is a schematic cross-sectional view of a touch display device according to another embodiment of the invention. Referring to fig. 1A and fig. 3, the touch display device 100c of the present embodiment is similar to the touch display device 100a of fig. 1A, and the difference between the two devices is: in the present embodiment, the flexible touch sensing layer 130c of the touch display device 100c continuously covers the second surface 114 of the flexible substrate 110. Similarly, the light emitting structure layer 120c continuously covers the first surface 112 of the flexible substrate 110. The touch display device 100c has flexibility, small volume and light weight, can be manufactured into 2D and 3D type display devices and switches, and can be applied to automobile steering wheels or automobile inner instrument panels, automobile touch keys, and vehicle-mounted product function keys related to overhead consoles/environmental consoles/GPS positioning receivers/satellite navigation.
Fig. 4 is a flowchart of a method for manufacturing a touch display device according to an embodiment of the invention. Referring to fig. 4, step S10, a flexible substrate and a flexible touch sensing material layer disposed on the flexible substrate are provided. Next, in step S20, a singulation process is performed on the flexible substrate and the flexible touch sensing material layer to form the flexible substrate 110 (see fig. 1B) and the flexible touch sensing layer 130a (see fig. 1B) disposed on the flexible substrate 110. That is, the flexible substrate and the flexible touch sensing material layer disposed on the flexible substrate are cut to form the flexible substrate 110 with a suitable size and the flexible touch sensing layer 130a thereon.
Next, referring to fig. 4 again, in step S30, a preheating process is performed on the flexible substrate 110 and the flexible touch sensing layer 130 a. The above steps can shape the flexible substrate 110 and the flexible touch sensing layer 130a thereon, and are also beneficial to the subsequent bonding process. Then, in step S40, the light emitting structure layer 120a (see fig. 1C) is placed in a mold together with the flexible substrate 110 (see fig. 1B) and the flexible touch sensing layer 130a (see fig. 1B) after the pre-heating process. Here, the light emitting structure layer 120a is, for example, disposed in a lower mold, and the flexible substrate 110 and the flexible touch sensing layer 130a thereon are, for example, disposed in an upper mold. Finally, in step S50, a bonding procedure is performed on the light emitting structure layer 120a, the flexible substrate 110 and the flexible touch sensing layer 130a to form the touch display device 100a (see fig. 1A), in which the light emitting structure layer 120a and the flexible touch sensing layer 130a are respectively located on the first surface 112 and the second surface 114 of the flexible substrate 110. The joining process here is, for example, high-pressure molding. Thus, the touch display device 100a is manufactured.
In short, in the present embodiment, the light emitting structure layer 120a, the flexible substrate 110 and the flexible touch sensing layer 130a are combined together in a module package manner by a mold, so as to form an integrally formed structure. Therefore, a conventional printed circuit board is not required, the weight of the touch display device 100a can be effectively reduced, and the requirements of light weight, thinness, shortness and smallness of the current electronic products are met. Furthermore, the integrated molding technique employs a more flexible design, eliminating dead space that leaves room to accommodate wires and connectors. In addition, the structural design and assembly are more automatic, the required raw materials are less, wires do not need to be added behind the console, and the manufacturing cost can be saved by at least 30%.
In summary, in the design of the touch display device of the invention, the flexible touch sensing layer and the light emitting structure layer are respectively located on two opposite sides of the flexible substrate. Compared with the prior art, the invention replaces the existing insulating layer with the flexible substrate, thereby reducing the production cost and the thickness of the whole touch display device, and enabling the flexible touch sensing layer to control the impedance change more effectively so as to improve the touch sensitivity.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.
Claims (11)
1. A touch display device, comprising:
a flexible substrate having a first surface and a second surface opposite to each other;
a light emitting structure layer disposed on the first surface of the flexible substrate; and
the flexible touch sensing layer is configured on the second surface of the flexible substrate.
2. The touch display device of claim 1, wherein the flexible touch sensing layer comprises a mesh metal layer or a flexible conductive silver paste layer.
3. The touch display device of claim 1, wherein the light emitting structure layer comprises a plurality of nanoscale light emitting elements, and each of the nanoscale light emitting elements comprises a light emitting diode.
4. The touch display device according to claim 1, wherein the flexible touch sensing layer comprises a plurality of touch sensing portions, and the touch sensing portions are disposed on the flexible substrate separately from each other and expose a portion of the second surface.
5. The touch display device according to claim 4, wherein the light emitting structure layer comprises a plurality of light emitting structure portions, and the plurality of light emitting structure portions are separately disposed on the flexible substrate and expose a portion of the first surface.
6. The touch display device of claim 1, wherein the flexible touch sensing layer continuously covers the second surface of the flexible substrate.
7. The touch display device according to claim 6, wherein the light emitting structure layer comprises a plurality of light emitting structure portions, and the plurality of light emitting structure portions are separately disposed on the flexible substrate and expose a portion of the first surface.
8. The touch display device of claim 6, wherein the light emitting structure layer continuously covers the first surface of the flexible substrate.
9. The touch display device of claim 1, further comprising:
and the protective layer is configured on the light-emitting structure layer, wherein the light-emitting structure layer is positioned between the protective layer and the flexible substrate.
10. The touch display device of claim 1, further comprising:
a cover plate disposed on the flexible touch sensing layer, wherein the flexible touch sensing layer is located between the cover plate and the flexible substrate.
11. A manufacturing method of a touch display device is characterized by comprising the following steps:
providing a flexible substrate and a flexible touch sensing material layer arranged on the flexible substrate;
performing a singulation process on the flexible substrate and the flexible touch sensing material layer to form a flexible substrate and a flexible touch sensing layer disposed on the flexible substrate;
performing a preheating procedure on the flexible substrate and the flexible touch sensing layer;
placing the light emitting structure layer, the flexible substrate subjected to the preheating process and the flexible touch sensing layer into a mold; and
and performing a bonding procedure on the light emitting structure layer, the flexible substrate and the flexible touch sensing layer to form a touch display device, wherein the light emitting structure layer and the flexible touch sensing layer are respectively located on the first surface and the second surface of the flexible substrate.
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CN202011156767.5A CN114489362A (en) | 2020-10-26 | 2020-10-26 | Touch display device and manufacturing method thereof |
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CN202011156767.5A CN114489362A (en) | 2020-10-26 | 2020-10-26 | Touch display device and manufacturing method thereof |
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CN101526870A (en) * | 2008-03-07 | 2009-09-09 | 禾瑞亚科技股份有限公司 | Sliding type input device and method thereof |
CN101587402A (en) * | 2009-06-29 | 2009-11-25 | 友达光电股份有限公司 | Flexible touch-control display device |
CN101853104A (en) * | 2010-06-02 | 2010-10-06 | 信利半导体有限公司 | Display with touch screen function and manufacturing method thereof |
CN202178750U (en) * | 2011-07-07 | 2012-03-28 | 许书维 | LED surface-projection-type trigger switch block |
US20140015772A1 (en) * | 2012-07-12 | 2014-01-16 | Hannstouch Solution Incorporated | Flexible touch-sensing display panel |
TWM472252U (en) * | 2013-10-22 | 2014-02-11 | Ind Tech Res Inst | Touch panel |
TWM491246U (en) * | 2014-02-14 | 2014-12-01 | Tronco Electric Machinery Inc | Capacitive touch switch structure |
US20190087046A1 (en) * | 2017-01-17 | 2019-03-21 | Boe Technology Group Co., Ltd. | Force touch sensor, display device and driving method thereof |
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2020
- 2020-10-26 CN CN202011156767.5A patent/CN114489362A/en active Pending
Patent Citations (8)
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CN101526870A (en) * | 2008-03-07 | 2009-09-09 | 禾瑞亚科技股份有限公司 | Sliding type input device and method thereof |
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