CN116413970A - Protective film structure and electronic paper display device - Google Patents

Protective film structure and electronic paper display device Download PDF

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Publication number
CN116413970A
CN116413970A CN202111646338.0A CN202111646338A CN116413970A CN 116413970 A CN116413970 A CN 116413970A CN 202111646338 A CN202111646338 A CN 202111646338A CN 116413970 A CN116413970 A CN 116413970A
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China
Prior art keywords
electronic paper
protective film
film structure
layer
substrate
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Pending
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CN202111646338.0A
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Chinese (zh)
Inventor
杨钦安
王耀骏
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Store Electronic Systems SA
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Store Electronic Systems SA
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Priority to CN202111646338.0A priority Critical patent/CN116413970A/en
Publication of CN116413970A publication Critical patent/CN116413970A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field
    • G02F1/1675—Constructional details
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field
    • G02F1/166—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
    • G02F1/167—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on translational movement of particles in a fluid under the influence of an applied field
    • G02F1/1675—Constructional details
    • G02F1/1679—Gaskets; Spacers; Sealing of cells; Filling or closing of cells

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Molecular Biology (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)

Abstract

The invention discloses a protective film structure and electronic paper display equipment. The electronic paper display device includes a driving substrate, an electronic paper film, and a protective film structure. The drive substrate has a surface. The electronic paper film is disposed on a surface of the driving substrate. The protective film structure is arranged on the driving substrate and comprises a laminated structure of a base material layer, a barrier layer and a waterproof adhesive layer, wherein the barrier layer is arranged between the base material layer and the waterproof adhesive layer, and the protective film structure is arranged on the driving substrate through the waterproof adhesive layer and covers the electronic paper film; the protective film structure is provided with a main body part and an extension part, the extension part is arranged on the periphery of the main body part in a surrounding mode, the main body part is attached to the top surface of the electronic paper film, which is far away from the driving substrate, and the extension part is attached to the surface of the driving substrate.

Description

Protective film structure and electronic paper display device
Technical Field
The present disclosure relates to electronic paper display devices, and particularly to a protective film structure for electronic paper display devices.
Background
With the progress of technology, electronic paper display devices as communication interfaces between people and machines are continuously advancing, and the electronic paper display devices are developed towards diversification to meet the demands of people. Because the electronic paper display device is a high-tech product, if moisture or foreign matter invades, the normal operation of the electronic paper display device is destroyed, and therefore, a layer of protective film is generally stuck on the display surface of the electronic paper display device to protect the electronic paper display device from the invasion of moisture or foreign matter, and further, the service life of the electronic paper display device is prolonged.
However, in order to achieve a better protection effect, the number of film layers of the existing protection film is large, and more process steps are required to be used for completion, so that the manufacturing cost of the electronic paper display device is relatively high.
Disclosure of Invention
The invention aims to provide a protective film structure and electronic paper display equipment with the same, which can improve optical effect in addition to lower manufacturing cost and process steps compared with the existing manufacturing process.
To achieve the above object, an electronic paper display device according to the present invention includes a driving substrate, an electronic paper film, and a protective film structure. The drive substrate has a surface. The electronic paper film is disposed on a surface of the driving substrate. The protective film structure is arranged on the driving substrate and comprises a laminated structure of a base material layer, a barrier layer and a waterproof adhesive layer, wherein the barrier layer is arranged between the base material layer and the waterproof adhesive layer, and the protective film structure is arranged on the driving substrate through the waterproof adhesive layer and covers the electronic paper film; the protective film structure is provided with a main body part and an extension part, the extension part is arranged on the periphery of the main body part in a surrounding mode, the main body part is attached to the top surface of the electronic paper film, which is far away from the driving substrate, and the extension part is attached to the surface of the driving substrate.
In order to achieve the above object, according to the present invention, a protective film structure is used in combination with a driving substrate and an electronic paper film, wherein the electronic paper film is disposed on a surface of the driving substrate, and the protective film structure comprises a substrate layer, a waterproof adhesive layer and a barrier layer. The barrier layer is arranged between the substrate layer and the waterproof adhesive layer, and the protective film structure is arranged on the driving substrate through the waterproof adhesive layer and covers the electronic paper film; the protective film structure is provided with a main body part and an extension part, the extension part is arranged on the periphery of the main body part in a surrounding mode, the main body part is attached to the top surface of the electronic paper film, which is far away from the driving substrate, and the extension part is attached to the surface of the driving substrate.
In one embodiment, the protective film structure further has a turning portion connecting the main body portion and the extension portion, respectively.
In one embodiment, the material of the waterproof adhesive layer comprises a cross-linked resin or an epoxy resin, or a combination thereof.
In one embodiment, the protective film structure further includes a functional layer disposed on a surface of the substrate layer remote from the barrier layer.
In one embodiment, the protective film structure has a thickness of 50 microns or more and 120 microns or less.
In summary, in the protective film structure and the electronic paper display device having the same of the present invention, the barrier layer passing through the protective film structure is disposed between the base material layer and the waterproof adhesive layer, and the protective film structure is disposed on the driving substrate and covers the electronic paper film by the waterproof adhesive layer; and the extension part of the protective film structure is arranged on the periphery of the main body part in a surrounding manner, the main body part is attached to the top surface of the electronic paper film far away from the driving substrate, and the extension part is attached to the surface of the driving substrate.
Drawings
Fig. 1A is a schematic diagram of an electronic paper display device according to an embodiment of the present invention.
Fig. 1B is a schematic cross-sectional view along the cut line A-A in the electronic paper display device of fig. 1A.
Fig. 1C is a schematic view of a protective film structure of the electronic paper display device of fig. 1A.
Fig. 2A is a schematic diagram of an electronic paper display device of a comparative example.
Fig. 2B is a schematic view of a protective film structure of the electronic paper display device of fig. 2A.
Detailed Description
A protective film structure according to a preferred embodiment of the present invention, and an electronic paper display device having the same, will be described below with reference to the accompanying drawings, in which like components will be described with like reference numerals. The following drawings are merely schematic and do not represent actual dimensions or proportions.
Fig. 1A is a schematic view of an electronic paper display device according to an embodiment of the present invention, fig. 1B is a schematic view of a cross section along a cutting line A-A in the electronic paper display device of fig. 1A, and fig. 1C is a schematic view of a protective film structure of the electronic paper display device of fig. 1A.
Referring to fig. 1A to 1C, the electronic paper display device 1 includes a driving substrate 11, an electronic paper film 12, and a protective film structure 13.
The driving substrate 11 has a surface S1, the electronic paper film 12 is disposed on the surface S1 of the driving substrate 11, and the driving substrate 11 can control the electronic paper film 12 to display an image. In some embodiments, the driving substrate 11 may include a plurality of pixels, each of which may have at least one switch, such as a Thin Film Transistor (TFT), so that the driving substrate 11 is an Active Matrix driving type thin film transistor substrate, thereby controlling whether an electric field is formed in each pixel. In some embodiments, the driving substrate 11 may also be a Passive Matrix (Passive Matrix) driving substrate, which is not limited. The substrate driving the substrate 11 may change its way depending on the product requirements. Here, the driving substrate 11 may include a glass substrate, a plastic substrate, or a flexible substrate, on which pixel circuits are disposed. Wherein the material of the flexible substrate is, for example, but not limited to, polyimide (PI).
The electronic paper film 12 is a bistable electronic paper display, and thus has advantages of power saving property, wide viewing angle, and the like, and may be Microcapsule (Microcapsule) electronic paper, micro cup (microcap) electronic paper, or cholesterol liquid crystal (Cholesteric Liquid Crystal) electronic paper, but is not limited thereto. In some embodiments, when the electronic paper film 12 is a microcapsule type or a micro-cup type electronic paper, the display medium may include an electrophoretic material, the electrophoretic material includes a plurality of charged light-colored pigment particles and a dark-colored medium solution, the pigment particles and the medium solution are respectively contained in a plurality of microcapsules, and the microcapsules may be combined together by using an adhesive; alternatively, the contents of the electrophoretic material may be a combination of dark colored pigment particles and a light colored medium solution; alternatively, the content of the electrophoretic material may be a combination of pigment particles of various colors and a light-colored medium solution, and the present invention is not limited thereto.
The protective film structure 13 is a protective film (Protective Film with Adhesive, PFA) having adhesiveness, which is provided on the driving substrate 11 and covers the driving substrate 11. In some embodiments, the protective film structure 13 may be attached to the electronic paper film 12 and the driving substrate 11 by an adhesive layer (e.g., OCA or OCR; not shown) to protect the electronic paper film 12. As shown in fig. 1B, the protective film structure 13 may have a main body portion A1, an extension portion A2, and a turning portion A3, where the extension portion A2 is enclosed on the outer periphery of the main body portion A1, and the turning portion A3 is located between the main body portion A1 and the extension portion A2 and connects the main body portion A1 and the extension portion A2, respectively. Herein, the main body portion A1 is attached to the top surface 121 of the electronic paper film 12 away from the driving substrate 11, and the extension portion A2 is attached to the surface S1 of the driving substrate 11, so as to completely protect the electronic paper film 12 from being invaded by external foreign matters or moisture, and improve the optical characteristics (e.g. contrast ratio is improved, which will be described later) and the lifetime of the electronic paper display device 1. In some embodiments, the thickness d of the protective film structure 13 may be greater than or equal to 40 microns, less than or equal to 120 microns. In some embodiments, the thickness d of the protective film structure 13 may be greater than or equal to 50 microns, less than or equal to 120 microns, such as 50, 55, 62, or 118 microns.
As shown in fig. 1C, the protective film structure 13 may include a laminated structure of a waterproof adhesive layer 131, a Barrier layer 132, and a substrate layer 133 from bottom to top. In addition, the protective film structure 13 of the present embodiment may further include a functional layer 134. The barrier layer 132 is disposed between the base material layer 133 and the waterproof adhesive layer 131, and the protective film structure 13 is disposed on the driving substrate 11 through the waterproof adhesive layer 131 and covers the electronic paper film 12. Herein, the waterproof adhesive layer 131 may have waterproof and adhesive properties, and a material thereof may include, for example, but not limited to, a Cross-Linked Resin (Cross-Linked Resin) or an Epoxy Resin (Epoxy), or a combination thereof; the barrier layer 132 can be a film layer made of metal or nonmetal, and the material can be Inorganic (Inorganic) or Organic (Organic) material, which can effectively block the transmission of gas or moisture and prolong the service life of the product; the material of the barrier layer 132 may include, for example, metal Oxide (Metal Oxide) or Acrylic material (Acrylic SixOy), or a combination thereof; the material of the substrate layer 133 may include, for example, polyethylene terephthalate (Polyethylene Terephtalate, PET), polyethylene (PE), or cellulose triacetate (Tri-cellulose Acetate, TAC), or a combination thereof. The functional layer 134 is disposed on a surface of the substrate layer 133 away from the barrier layer 132 (i.e., an upper surface of the substrate layer 133). The functional layer 134 is a light-transmitting Film layer, for example, but not limited to, an antiglare Film (Anti-glare Film), an antireflection Film (Anti-Reflection Film), an Anti-fingerprint Film (Anti-finger printing Film), a waterproof and antifouling Film, or a scratch-resistant Film (Anti-scratch Film), or a hard coat layer composed of a combination of the above functions.
Referring to fig. 1A again, the electronic paper display device 1 of the present embodiment may further include a connection circuit board 14, a driving chip 15, and a system control board 16. The driving chip 15 is provided on the driving substrate 11. Herein, the driving Chip 15 is disposed On the driving substrate 11 in a Glass substrate On Glass (COG) technology. In some embodiments, the driving substrate 11 and the electronic paper film 12 form a display module, and the driving chip 15 may include a Scan driving circuit (Scan Driver) and/or a Data driving circuit (Data Driver) of the display module. In other words, the driving chip 15 has a scanning line driving function of the display module, or a data line driving function; alternatively, having both (integrated) the scan line driving function and the data line driving function is not limited. The connection circuit board 14 is, for example but not limited to, a flexible circuit board, and is electrically connected to the driving chip 15 and the system control board 16, respectively, so that the system control board 16 can transmit the control signal for driving the electronic paper film 12 to the driving chip 15 and the driving substrate 11 through the connection circuit board 14 to control the electronic paper film 12 to display images.
Next, a comparative example structure of another electronic paper display device and a protective film structure thereof will be described.
Referring to fig. 2A and 2B, the electronic paper display device 2 also includes a driving substrate 21, an electronic paper film 22, and a protective film structure 23. The electronic paper film 22 is disposed on the driving substrate 21, and the protective film structure 23 covers the top surface 221 of the electronic paper film 22, but does not directly contact the surface S1 of the driving substrate 21. In addition, the electronic paper display device 2 may further include a sealing member 27, and the sealing member 27 may be, for example, a frame glue, which is disposed on the surface S1 of the driving substrate 11 and is located at the periphery of the electronic paper film 22 and the protective film structure 23. Herein, a portion of the seal 27 material fills the gap between the e-paper film 22 and the protective film structure 23. In the comparative example of fig. 2B, the protective film structure 23 is composed of, in order from bottom to top, a barrier layer 231 (the material may be a metal oxide), a first base material layer 232 (the material may be PET), an adhesive layer 233 (the material may be OCA), a second base material layer 234 (the material may be PET), and a functional layer 235 (e.g., an antiglare film).
As can be seen from comparing fig. 1B and fig. 2A, the manner in which the protective film structure 13 in fig. 1B is disposed on the driving substrate 11 is different from the manner in which the protective film structure 23 in fig. 2A is disposed on the driving substrate 21 due to the different film layer structure and material, and the sealing member 27 is not required to be used to achieve the function of preventing the intrusion of foreign matters or moisture, so that the electronic paper display device 2 and the protective film structure 23 can have fewer steps, less material and lower cost.
As can be seen from comparing fig. 1C and fig. 2B, the protective film structure 13 of fig. 1C can omit the adhesive layer 233 and the second substrate layer 234 with respect to the protective film structure 23 of the comparative example, but a waterproof adhesive layer 131 is added to increase the waterproof effect. Therefore, the number of layers of the protective film structure 13 is not only small, but two process steps can be reduced in the manufacturing process. In addition, as shown in the following table, the protective film structure 13 and the electronic paper display device 1 according to the above embodiments can save manufacturing steps and costs, and have the technical effect of improving optical effects compared with the comparative example.
Figure BDA0003445337400000051
List one
In summary, in the protective film structure and the electronic paper display device having the same of the present invention, the barrier layer passing through the protective film structure is disposed between the base material layer and the waterproof adhesive layer, and the protective film structure is disposed on the driving substrate and covers the electronic paper film by the waterproof adhesive layer; and the extension part of the protective film structure is arranged on the periphery of the main body part in a surrounding manner, the main body part is attached to the top surface of the electronic paper film far away from the driving substrate, and the extension part is attached to the surface of the driving substrate.
The foregoing is by way of example only and not limiting. Any equivalent modifications or variations to the present invention without departing from the spirit and scope of the present invention are intended to be included in the following claims.
Description of the reference numerals
1. 2: electronic paper display device
11. 21: driving a substrate
12. 22: electronic paper film
121. 221: top surface
13. 23: protective film structure
131: waterproof adhesive layer
132. 231: barrier layer
133: substrate layer
134. 235: functional layer
14: connection circuit board
15: driving chip
16: system control panel
232: a first substrate layer
233: adhesive layer
234: a second substrate layer
27: sealing element
A-A: cutting thread
A1: main body part
A2: extension part
A3: turning part
S1: surface of the body

Claims (10)

1. An electronic paper display device comprising:
a drive substrate having a surface;
an electronic paper film disposed on the surface of the driving substrate; and
the protective film structure is arranged on the driving substrate and comprises a laminated structure of a base material layer, a barrier layer and a waterproof adhesive layer, wherein the barrier layer is arranged between the base material layer and the waterproof adhesive layer, and the protective film structure is arranged on the driving substrate through the waterproof adhesive layer and covers the electronic paper film;
the protective film structure is provided with a main body part and an extension part, the extension part is arranged on the periphery of the main body part in a surrounding mode, the main body part is attached to the top surface of the electronic paper film, which is far away from the driving substrate, and the extension part is attached to the surface of the driving substrate.
2. The electronic paper display device according to claim 1, wherein the protective film structure further has turning portions that connect the main body portion and the extension portion, respectively.
3. The electronic paper display device of claim 1, wherein the material of the waterproof adhesive layer comprises a cross-linked resin or an epoxy resin, or a combination thereof.
4. The electronic paper display device of claim 1, wherein the protective film structure further comprises a functional layer disposed on a surface of the substrate layer remote from the barrier layer.
5. The electronic paper display device of claim 1, wherein the protective film structure has a thickness of 50 microns or more and 120 microns or less.
6. A protective film structure for use with a drive substrate and an electronic paper film, the electronic paper film disposed on a surface of the drive substrate, the protective film structure comprising:
a substrate layer;
a waterproof adhesive layer; and
a barrier layer disposed between the base material layer and the waterproof adhesive layer, and the protective film structure is disposed on the driving substrate through the waterproof adhesive layer and covers the electronic paper film;
the protective film structure is provided with a main body part and an extension part, the extension part is arranged on the periphery of the main body part in a surrounding mode, the main body part is attached to the top surface of the electronic paper film, which is far away from the driving substrate, and the extension part is attached to the surface of the driving substrate.
7. The protective film structure of claim 6, further having a turn connecting the main body portion and the extension portion, respectively.
8. The protective film structure of claim 6, wherein the material of the waterproof adhesive layer comprises a cross-linked resin or an epoxy resin, or a combination thereof.
9. The protective film structure of claim 6, wherein the protective film structure further comprises a functional layer disposed on a surface of the substrate layer remote from the barrier layer.
10. The protective film structure of claim 6, wherein the protective film structure has a thickness of 50 microns or more and 120 microns or less.
CN202111646338.0A 2021-12-30 2021-12-30 Protective film structure and electronic paper display device Pending CN116413970A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111646338.0A CN116413970A (en) 2021-12-30 2021-12-30 Protective film structure and electronic paper display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111646338.0A CN116413970A (en) 2021-12-30 2021-12-30 Protective film structure and electronic paper display device

Publications (1)

Publication Number Publication Date
CN116413970A true CN116413970A (en) 2023-07-11

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
CN (1) CN116413970A (en)

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