CN118169929A - Display device and manufacturing method thereof - Google Patents
Display device and manufacturing method thereof Download PDFInfo
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- CN118169929A CN118169929A CN202211582155.1A CN202211582155A CN118169929A CN 118169929 A CN118169929 A CN 118169929A CN 202211582155 A CN202211582155 A CN 202211582155A CN 118169929 A CN118169929 A CN 118169929A
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- layer
- water
- blocking
- display medium
- display device
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 239000010410 layer Substances 0.000 claims abstract description 198
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000000758 substrate Substances 0.000 claims abstract description 37
- 239000012790 adhesive layer Substances 0.000 claims abstract description 36
- 239000011241 protective layer Substances 0.000 claims abstract description 32
- 230000000903 blocking effect Effects 0.000 claims abstract description 30
- 239000003292 glue Substances 0.000 claims description 26
- 230000003287 optical effect Effects 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 19
- 230000004888 barrier function Effects 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 5
- 229910010293 ceramic material Inorganic materials 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 229920000620 organic polymer Polymers 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 230000035515 penetration Effects 0.000 abstract description 5
- 230000035699 permeability Effects 0.000 description 12
- 239000010408 film Substances 0.000 description 6
- 239000010409 thin film Substances 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 4
- 239000004926 polymethyl methacrylate Substances 0.000 description 4
- 238000002834 transmittance Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000009545 invasion Effects 0.000 description 2
- 238000012858 packaging process Methods 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention provides a display device and a manufacturing method thereof. The display device comprises a driving substrate, a display medium layer, a water-blocking air layer, a protective layer and an adhesive layer. The display medium layer is configured on the driving substrate. The water-blocking air layer is arranged on the display medium layer and covers the periphery of the display medium layer. The protective layer is arranged on the water-blocking air layer. The adhesive layer covers the periphery of the water-blocking air layer and at least part of the periphery of the protective layer. The water-gas penetration rate of the water-blocking air layer is smaller than that of the adhesive layer. The display device can increase the lateral water blocking effect and has better structural reliability.
Description
Technical Field
The present invention relates to a display device and a method for manufacturing the same, and more particularly, to a display device capable of increasing a lateral water blocking effect and a method for manufacturing the same.
Background
In the existing electronic paper display, the display medium layer is located between the protective layer and the driving substrate, wherein after the components are assembled, a glue layer is formed between the protective layer and the display medium layer through a glue coating packaging process (EDGED SEALING) and extends to cover the peripheral surface of the protective layer, so that the display medium layer is used as a lateral water-vapor barrier structure of the electronic paper display. However, the glue packaging process forms a wider water vapor transmission path (i.e., the distance between the passivation layer and the driving substrate), and the water vapor transmission rate (Water vapor transmission rate, WVTR) of the glue layer cannot pass the environmental test, so that if the water vapor transmission rate of the glue layer is to be improved, the viscosity (Viscosity) of the glue layer is to be increased and the operability of the process is to be sacrificed. Another type of encapsulation process (PINCHED SEALING), while effective in reducing the width of the moisture path, can produce unavoidable Air gaps that sacrifice narrow frame designs.
Disclosure of Invention
The invention is directed to a display device and a manufacturing method thereof, which can increase the lateral water blocking effect and have better structural reliability.
According to an embodiment of the invention, a display device comprises a driving substrate, a display medium layer, a water-blocking air layer, a protective layer and an adhesive layer. The display medium layer is configured on the driving substrate. The water-blocking air layer is arranged on the display medium layer and covers the periphery of the display medium layer. The protective layer is arranged on the water-blocking air layer. The adhesive layer covers the periphery of the water-blocking air layer and at least part of the periphery of the protective layer. The water-gas penetration rate of the water-blocking air layer is smaller than that of the adhesive layer.
In the display device according to the embodiment of the invention, the light transmittance of the water blocking gas layer described above is greater than 85%.
In the display device according to the embodiment of the invention, the driving substrate has a surface, and the display medium layer is disposed on the surface to expose a portion of the surface. The water-blocking gas layer also extends to cover the exposed surface of the display medium layer.
In the display device according to the embodiment of the invention, the water-blocking air layer and the periphery of the display medium layer have an air gap.
In an embodiment of the display device, a material of the water-blocking layer includes a polymer-derived ceramic material or an organic polymer.
In the display device according to the embodiment of the invention, the protective layer includes a cover plate and a barrier layer. The barrier layer covers one side surface of the cover plate, and part of the barrier layer is located between the cover plate and the water-blocking air layer.
In an embodiment of the present invention, the display device further includes an optical adhesive layer disposed between the water-blocking air layer and the protective layer or between the water-blocking air layer and the display medium layer, for fixing the protective layer on the display medium layer.
According to an embodiment of the present invention, a method for manufacturing a display device includes the following steps. A drive substrate is provided. A display medium layer is disposed on the driving substrate. And forming a water blocking air layer on the display medium layer and covering the periphery of the display medium layer. And (3) configuring a protective layer on the water-blocking air layer. And forming an adhesive layer around the water-blocking air layer and at least part of the protective layer, wherein the water-blocking air layer has a water-gas transmittance smaller than that of the adhesive layer.
In the method of manufacturing a display device according to an embodiment of the present invention, the method of forming the water blocking layer described above includes a spray coating method or a slit coating method.
In the method for manufacturing the display device according to the embodiment of the invention, the method for forming the adhesive layer includes a dispensing method.
Based on the above, in the design of the display device of the present invention, the water-blocking air layer covers the periphery of the display medium layer, and the glue layer covers the periphery of the water-blocking air layer, wherein the water-gas permeability of the water-blocking air layer is smaller than the water-gas permeability of the glue layer. Therefore, the lateral water vapor blocking effect of the display medium layer can be improved, so that the display medium layer is prevented from being damaged due to lateral water vapor, and the width of the water blocking channel can be effectively reduced. Therefore, the display device of the invention has better structural reliability and can achieve the effect of narrow frame.
Drawings
FIG. 1 is a schematic cross-sectional view of a display device according to an embodiment of the invention;
FIG. 2 is a schematic cross-sectional view of a display device according to another embodiment of the invention;
FIG. 3 is a schematic cross-sectional view of a display device according to another embodiment of the invention;
fig. 4A to 4F are schematic cross-sectional views illustrating a method for manufacturing a display device according to an embodiment of the invention.
Description of the reference numerals
100A, 100b, 100 c;
110, driving a substrate;
112. 143, surface;
120, displaying a medium layer;
121. 131a, 131b, 131c, 141, 161 a;
123, upper surface;
130a, 130b, 130c, a water-blocking gas layer;
140, a protective layer;
142, cover plate;
144 a barrier layer;
145, bottom surface;
150a, 150c, glue layers;
160a, an optical adhesive layer;
An air gap;
c, coating tools;
D, dispensing tools;
w is the width.
Detailed Description
Reference will now be made in detail to the exemplary embodiments of the present 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.
Embodiments of the invention may be understood in conjunction with the accompanying drawings, which are also considered part of the disclosure. It should be understood that the drawings of the present invention are not drawn to scale and that virtually any enlargement or reduction of the size of the elements is possible in order to clearly demonstrate the features of the present invention.
Fig. 1 is a schematic cross-sectional view of a display device according to an embodiment of the invention. Referring to fig. 1, in the present embodiment, a display device 100a includes a driving substrate 110, a display medium layer 120, a water-blocking air layer 130a, a protective layer 140 and an adhesive layer 150a. The display medium layer 120 is disposed on the driving substrate 110. The water blocking gas layer 130a is disposed on the display medium layer 120 and covers the periphery 121 of the display medium layer 120, i.e., the water blocking gas layer 130a covers each side of the medium layer 120. The protective layer 140 is disposed on the water-blocking air layer 130 a. The adhesive layer 150a covers the periphery 131a of the water-blocking air layer 130a and at least part of the periphery 141 of the protective layer 140. The Water Vapor Transmission Rate (WVTR) of the water-blocking air layer 130a is smaller than that of the glue layer 150a, that is, the water vapor blocking effect of the water-blocking air layer 130a is better than that of the glue layer 150a. The circumference referred to in this specification, i.e., defined by a top view surrounding each side, and by a cross-sectional view, is defined by each side, e.g., the glue layer 150a covers the circumference 131a of the water-blocking gas layer 130a, i.e., the glue layer 150a covers each side of the water-blocking gas layer 130 a.
In detail, in the present embodiment, the driving substrate 110 has a surface 112, wherein the driving substrate 110 is, for example, an active device array substrate, such as a Thin Film transistor (Thin Film Transistor) array substrate or a Thin Film Diode (TFD) array substrate, but not limited thereto. The display medium layer 120 is disposed on the surface 112 to expose a portion of the surface 112, wherein the display medium layer 120 is, for example, but not limited to, an electrophoretic display film or an electrowetting display film. The water-blocking gas layer 130a covers the upper surface 123 and the periphery 121 of the display medium layer 120, and also extends to cover the surface 112 of the driving substrate 110 exposed by the display medium layer 120, so as to cover the display medium layer 120 therein. Here, the water vapor permeability of the water-blocking gas layer 130a is, for example, 1g/m 2 day, wherein the water-blocking gas layer 130a is made of an optical grade material, for example, a polymer-derived ceramic material or an organic polymer. In one embodiment, the light transmittance of the water-blocking gas layer 130a may be greater than 85%. The moisture permeability of the adhesive layer 150a is, for example, 10g/m 2 day, wherein the adhesive layer 150a is, but not limited to, epoxy, polymethyl methacrylate (PMMA) or silicone.
Referring to fig. 1 again, the protection layer 140 of the present embodiment includes a cover 142 and a barrier 144. The blocking layer 144 covers a side surface 143 of the cover 142, and a portion of the blocking layer 144 is located between the cover 142 and the water-blocking layer 130a, wherein the moisture permeability of the blocking layer 144 is, for example, 10 -3g/m2 day, and can be used to block moisture. The distance from the bottom surface 145 of the blocking layer 144 to the surface 112 of the driving substrate 110 is the width of the water blocking channel, however, since the water blocking layer 130a of the embodiment extends to cover the surface 112 of the driving substrate 110, the width W of the water blocking channel can be narrowed, i.e. the length required for blocking water vapor is shortened, and thus the design of a narrow frame can be achieved. The protective layer 140 of the present embodiment may have a single-layer structure, for example, an antiglare layer or a cover sheet.
In addition, in the present embodiment, the display device 100a further includes an optical adhesive layer 160a, wherein the optical adhesive layer 160a is disposed between the water-blocking air layer 130a and the protective layer 140, so as to fix the protective layer 140 on the display medium layer 120. The Optical adhesive layer 160a is, for example, an optically transparent adhesive (Optical CLEAR ADHESIVE, OCA) in a film shape. It should be noted that, the front projection of the optical adhesive layer 160a on the display medium layer 120 may be slightly larger than or equal to the display medium layer 120, but in another embodiment, the optical adhesive layer 160a may be disposed with the same width and conformal to the protective layer 140, which is still within the scope of the present invention.
As shown in fig. 1, the adhesive layer 150a covers the periphery 131a of the water-blocking air layer 130a, the periphery 161a of the optical adhesive layer 160a, and the periphery 141 of the partial protection layer 140. In this embodiment, due to the arrangement of the water-blocking gas layer 130a, the number of water-gas penetration interfaces is increased, and the time for increasing the unstable state (unsteady state) according to the diffusion theory can be known, so that the time for reaching the water-gas valve can be delayed. That is, the diffusion rate of moisture intrusion can be retarded.
In short, since the water blocking air layer 130a covers the periphery 121 of the display medium layer 120 and the surface 112 of the driving substrate 110, and the glue layer 150a covers the periphery of the water blocking air layer 130a, the water vapor transmission rate of the water blocking air layer 130a is smaller than that of the glue layer 150 a. Therefore, the water-blocking effect of the display medium layer 120 in the lateral direction is improved by increasing the water-penetrating interface to delay the water intrusion rate, so as to prevent the display medium layer 120 from being damaged by the lateral water, and the width W of the water-blocking channel is effectively reduced, so that the distance required by water-blocking is shortened. Therefore, the display device 100a of the present embodiment can have better structural reliability, and can achieve the effect of a narrow frame.
It should be noted that the following embodiments use the element numbers and part of the content of the foregoing embodiments, where the same numbers are used to denote the same or similar elements, and descriptions of the same technical content are omitted. For the description of the omitted parts, reference is made to the foregoing embodiments, and the following embodiments are not repeated.
Fig. 2 is a schematic cross-sectional view of a display device according to another embodiment of the invention. Referring to fig. 1 and 2, the display device 100b of the present embodiment is similar to the display device 100a of fig. 1, and the difference between them is that: in this embodiment, the water-blocking air layer 130b has an air gap a with the periphery 121 of the display medium layer 120. That is, the water blocking gas layer 130b is not in contact with the periphery 121 of the display medium layer 120, but forms an air gap a. Here, the glue layer 150a still covers the periphery 131b of the water-blocking air layer 130b, the periphery 161a of the optical glue layer 160a, and the periphery 141 of the part of the protection layer 140, wherein the water-air penetration interface is increased by the arrangement of the water-blocking air layer 130b and the glue layer 150a to delay the water-air invasion rate.
Fig. 3 is a schematic cross-sectional view of a display device according to another embodiment of the invention. Referring to fig. 1 and 3, the display device 100c of the present embodiment is similar to the display device 100a of fig. 1, and the difference is that: in the present embodiment, the water-blocking layer 130c covers the upper surface 123 and the periphery 121 of the display medium layer 120 and part of the surface 112 of the driving substrate 110. That is, the water blocking air layer 130c does not entirely cover the surface 112 of the driving substrate 110 exposed by the display medium layer 120. Here, the adhesive layer 150c covers the surface 112 of the driving substrate 110, the periphery 131c of the water-blocking layer 130c, the periphery 161a of the optical adhesive layer 160a, and the periphery 141 of the part of the protection layer 140, wherein the water-air penetration interface is increased by the arrangement of the water-blocking layer 130c and the adhesive layer 150c to delay the water-air invasion rate.
Only the structures of the display devices 100a, 100b, and 100c of the present embodiment are described above. The method of manufacturing the display device 100a of the present embodiment will be described below with reference to fig. 4A to 4F.
Fig. 4A to 4F are schematic cross-sectional views illustrating a method for manufacturing a display device according to an embodiment of the invention. In the fabrication of the display device 100a of the present embodiment, first, referring to fig. 4A, a driving substrate 110 is provided. The driving substrate 110 is, for example, an active device array substrate, such as a Thin Film transistor (Thin Film Transistor) array substrate or a Thin Film Diode (TFD) array substrate, but not limited thereto.
Next, referring to fig. 4B, a display medium layer 120 is disposed on the driving substrate 110, wherein the display medium layer 120 is disposed on the surface 112 of the driving substrate 110 and exposes a portion of the surface 112. The display medium layer 120 is, for example, an electrophoretic display film or an electrowetting display film, but not limited thereto.
Next, referring to fig. 4C, a water-blocking layer 130a is formed on the upper surface 123 of the display medium layer 120 and covers the periphery 121 of the display medium layer 120 and the surface 112 of the driving substrate 110 exposed by the display medium layer 120. That is, the display medium layer 120 is encapsulated with the water blocking gas layer 130 a. Here, the method of forming the water blocking layer 130a is, for example, spraying or slit coating by the spraying tool C. The water vapor permeability of the water-blocking gas layer 130a is, for example, 1g/m 2 day, wherein the water-blocking gas layer 130a is made of an optical grade material, for example, a polymer-derived ceramic material or an organic polymer. In one embodiment, the light transmittance of the water-blocking gas layer 130a may be greater than 85%.
Next, referring to fig. 4D, an optical adhesive layer 160a is disposed on the water-blocking air layer 130a, wherein the optical adhesive layer 160a is attached to the water-blocking air layer 130a, and the front projection of the optical adhesive layer 160a on the display medium layer 120 may be slightly larger than or equal to the display medium layer 120. The Optical adhesive layer 160a is, for example, an optically transparent adhesive (Optical CLEAR ADHESIVE, OCA) in a film shape.
Then, referring to fig. 4E, a protective layer 140 is disposed on the water-blocking layer 130a, wherein the protective layer 140 is fixed on the display medium layer 120 through an optical adhesive layer 160 a. Here, the protection layer 140 includes a cover 142 and a barrier layer 144, wherein the barrier layer 144 covers a side surface 143 of the cover 142, and a portion of the barrier layer 144 is located between the cover 142 and the water-blocking layer 130a, and the moisture permeability of the barrier layer 144 is, for example, 10 -3g/m2 day, and can be used to block moisture.
Finally, referring to fig. 4F, an adhesive layer 150a is formed on the periphery 131a of the water-blocking layer 130a, the periphery 161a of the optical adhesive layer 160a, and the periphery 141 of at least part of the protective layer 140, wherein the moisture permeability of the water-blocking layer 130a is smaller than the moisture permeability of the adhesive layer 150 a. Here, the moisture permeability of the glue layer 150a is, for example, 10g/m 2 day, wherein the glue layer 150a is, for example, epoxy, polymethyl methacrylate (PMMA) or silicone, which can enhance the waterproof performance of the ring test. The method of forming the glue layer 150a is, for example, a dispensing method performed by a dispensing tool D. Thus, the fabrication of the display device 100a is completed.
In summary, in the design of the display device of the present invention, the water-blocking air layer covers the periphery of the display medium layer, and the glue layer covers the periphery of the water-blocking air layer, wherein the water-gas permeability of the water-blocking air layer is smaller than the water-gas permeability of the glue layer. Therefore, the lateral water vapor blocking effect of the display medium layer can be improved, so that the display medium layer is prevented from being damaged due to lateral water vapor, and the width of the water blocking channel can be effectively reduced. Therefore, the display device of the invention has better structural reliability and can achieve the effect of narrow frame.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (10)
1. A display device, comprising:
A driving substrate;
A display medium layer disposed on the driving substrate;
a water-blocking air layer which is arranged on the display medium layer and covers the periphery of the display medium layer;
a protective layer disposed on the water-blocking air layer; and
And the glue layer is used for covering the periphery of the water-blocking air layer and at least part of the periphery of the protective layer, wherein the water-blocking air layer has a water vapor transmission rate smaller than that of the glue layer.
2. The display device of claim 1, wherein the light transmission of the water-blocking gas layer is greater than 85%.
3. The display device of claim 1, wherein the drive substrate has a surface on which the display medium layer is located exposing a portion of the surface, and the water-blocking gas layer further extends to cover the surface exposed by the display medium layer.
4. A display device according to claim 3, wherein the water-blocking gas layer has an air gap with the surroundings of the display medium layer.
5. The display device of claim 1, wherein the material of the water-blocking gas layer comprises a polymer-derived ceramic material or an organic polymer.
6. The display device according to claim 1, wherein the protective layer includes a cover plate and a barrier layer covering a side surface of the cover plate, and a portion of the barrier layer is located between the cover plate and the water blocking gas layer.
7. The display device according to claim 1, further comprising:
And the optical adhesive layer is arranged between the water-blocking air layer and the protective layer or between the water-blocking air layer and the display medium layer and is used for fixing the protective layer on the display medium layer.
8. A method for manufacturing a display device, comprising:
providing a driving substrate;
configuring a display medium layer on the driving substrate;
forming a water blocking air layer on the display medium layer and covering the periphery of the display medium layer;
Configuring a protective layer on the water-blocking air layer; and
And forming an adhesive layer around the water-blocking air layer and at least part of the protective layer, wherein the water-blocking air layer has a water vapor transmission rate smaller than that of the adhesive layer.
9. The method of manufacturing a display device according to claim 8, wherein the method of forming the water-blocking air layer includes a spray coating method or a slit coating method.
10. The method of claim 8, wherein the method of forming the glue layer comprises a dispensing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211582155.1A CN118169929A (en) | 2022-12-09 | 2022-12-09 | Display device and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211582155.1A CN118169929A (en) | 2022-12-09 | 2022-12-09 | Display device and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118169929A true CN118169929A (en) | 2024-06-11 |
Family
ID=91349218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211582155.1A Pending CN118169929A (en) | 2022-12-09 | 2022-12-09 | Display device and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118169929A (en) |
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2022
- 2022-12-09 CN CN202211582155.1A patent/CN118169929A/en active Pending
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