CN115284696B - Composite optical film structure and method for manufacturing the same - Google Patents

Composite optical film structure and method for manufacturing the same Download PDF

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Publication number
CN115284696B
CN115284696B CN202210960916.6A CN202210960916A CN115284696B CN 115284696 B CN115284696 B CN 115284696B CN 202210960916 A CN202210960916 A CN 202210960916A CN 115284696 B CN115284696 B CN 115284696B
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China
Prior art keywords
substrate
optical film
optical
adhesive
composite
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CN202210960916.6A
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Chinese (zh)
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CN115284696A (en
Inventor
张东
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Interface Optoelectronics Shenzhen Co Ltd
Interface Technology Chengdu Co Ltd
General Interface Solution Ltd
Original Assignee
Interface Optoelectronics Shenzhen Co Ltd
Interface Technology Chengdu Co Ltd
Yecheng Optoelectronics Wuxi Co Ltd
General Interface Solution Ltd
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Publication of CN115284696A publication Critical patent/CN115284696A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B37/1284—Application of adhesive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0004—Cutting, tearing or severing, e.g. bursting; Cutter details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/04—Punching, slitting or perforating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/017—Head mounted
    • G02B27/0172—Head mounted characterised by optical features

Abstract

A composite optical film structure and a manufacturing method thereof are provided, wherein the composite optical film structure comprises a first substrate, a second substrate, a first optical film, a second optical film, an opening, an optical pin formed by a first optical adhesive and a second optical adhesive. The first substrate and the second substrate are arranged opposite to each other; the first optical film and the second optical film are respectively attached to the opposite surfaces of the first substrate and the second substrate and are oppositely arranged with a gap therebetween; openings pass through the first optical film into the first substrate or through the second optical film into the second substrate; the optical pin is sealed and formed in the opening; the second optical cement seal is formed in the gap, so that the first substrate and the second substrate are mutually bonded. The invention can obviously improve the defect of edge bubbles generated by shrinkage of the optical film by forming the optical pin.

Description

Composite optical film structure and method for manufacturing the same
Technical Field
The present invention relates to an optical film structure and a method for manufacturing the same, and more particularly, to a composite optical film structure capable of improving bubble defects at edges of a product and a method for manufacturing the same.
Background
In many of the present optical products, one or more optical films (such as polarizer, antireflection film, etc.) and transparent imaging systems (such as plate glass, special-shaped lenses, etc.) are bonded together by optical adhesive to form the final structure. Among the most familiar, most common are composite optical film structures applied to augmented reality/virtual reality (AR/VR), which generally consist of two or more lenses and one or more layers of optical film in an interlayer. As shown in fig. 1, in a conventional composite optical film structure, two layers of optical films 2 are disposed between two layers of base materials 1 as an interlayer, and the optical films 2 in the interlayer are generally directly bonded to the base materials 1 by using a profiling film material with an optical adhesive 3, or are bonded to the base materials 1 by using a large piece of film material through the optical adhesive 3, and then subjected to profiling cutting, and are bonded between the two layers of optical films 2 by using an optical adhesive 4. After the final product is assembled in this way and subjected to a high temperature and high humidity stability test, as shown in fig. 2, the edge of the product is liable to generate bubbles 5 due to shrinkage of the optical film 2.
The presence of such bubble defects would lead to the following drawbacks:
(1) Affecting the appearance of the product;
(2) The effective imaging area of the optical product is reduced, and the imaging quality is reduced;
(3) Light leakage, interference light, diffraction light and the like appear at the edge of the product, so that the imaging quality is reduced;
(4) The shrinkage of the optical film material can lead the sealing performance of the lamination gap of the product to be poor, so that water vapor or sweat, oil stain and the like of the skin of a user can easily enter the product, and the performance attenuation, aging and even scrapping of the product are accelerated.
Accordingly, there is a strong need in the industry to find a composite optical film structure that can improve the bubble defect caused by the shrinkage of the optical film, so that the above-mentioned difficulties and disadvantages encountered in the prior art can be solved.
Disclosure of Invention
Accordingly, the present invention is directed to a composite optical film structure and a method for manufacturing the same, which can effectively reduce or even suppress shrinkage of an optical film by forming optical pins, thereby reducing or even eliminating edge bubble defects caused by shrinkage of the optical film.
In order to achieve the above objective, the present invention provides a composite optical film structure, which includes a first substrate, a second substrate, a first optical film, a second optical film, an opening, an optical pin, and a second optical adhesive. Wherein the first substrate is disposed opposite to the first substrate. The first optical film is attached to the surface of the first substrate opposite to the second substrate. The second optical film is attached to the surface of the second substrate opposite to the first substrate and is arranged opposite to the first optical film with a gap. The openings pass through the first optical film from a surface edge of the first optical film and into the first substrate, or pass through the second optical film from a surface edge of the second optical film and into the second substrate. The optical pin is sealed and formed in the opening by the first optical adhesive. The second optical cement seal is formed in the gap, so that the first substrate and the second substrate are mutually bonded.
According to an embodiment of the present invention, the number of the openings is plural, and some of the openings pass through the first optical film and enter the first substrate, and the other openings pass through the second optical film and enter the second substrate to form a plurality of optical pins.
According to an embodiment of the present invention, the depth of the opening is not more than 1/3 of the thickness of the first substrate or the second substrate.
According to an embodiment of the present invention, the first substrate and the second substrate are transparent substrates; preferably, the first substrate and the second substrate are plastic or glass.
According to an embodiment of the present invention, the first optical cement and the second optical cement are liquid optical cement.
According to an embodiment of the present invention, the composite optical film structure further includes a third optical adhesive, and the third optical adhesive is formed between the first optical film and the first substrate.
According to an embodiment of the present invention, the composite optical film structure further includes a fourth optical adhesive, and the fourth optical adhesive is formed between the second optical film and the second substrate.
In addition, the invention also provides a manufacturing method of the composite optical film structure, which comprises the following steps: first, a first optical film is bonded to a first substrate, and a second optical film is bonded to a second substrate. An opening is then formed through the first optical film from a surface edge of the first optical film and into the first substrate, or through the second optical film from a surface edge of the second optical film and into the second substrate. Then, the first optical cement is sealed and formed in the opening to form an optical pin. Then, the first optical film and the second optical film are arranged to face each other with a gap therebetween, and the first substrate and the second substrate are arranged to face each other. Finally, the second optical cement is sealed and formed in the gap, so that the first substrate and the second substrate are mutually bonded.
According to an embodiment of the present invention, the number of the openings is plural, and some of the openings pass through the first optical film and enter the first substrate, and the other openings pass through the second optical film and enter the second substrate to form a plurality of optical pins.
According to an embodiment of the present invention, the depth of the opening is not more than 1/3 of the thickness of the first substrate or the second substrate.
According to an embodiment of the present invention, the first substrate and the second substrate are transparent substrates; preferably, the first substrate and the second substrate are plastic or glass.
According to an embodiment of the present invention, the first optical cement and the second optical cement are liquid optical cement.
According to an embodiment of the present invention, the method for manufacturing a composite optical film structure further includes forming a third optical adhesive between the first optical film and the first substrate.
According to an embodiment of the present invention, the method for manufacturing a composite optical film structure further includes forming a fourth optical adhesive between the second optical film and the second substrate.
According to the embodiment of the invention, the step of forming the opening is performed by using laser engraving, CNC machining or machining by a mechanical drill.
According to an embodiment of the present invention, the first optical adhesive and the second optical adhesive are the same liquid optical adhesive, and after the step of disposing the first optical film and the second optical film opposite to each other, the liquid optical adhesive is simultaneously sealed and formed in the gap and the opening to form the optical pin.
Compared with the prior art, the invention has the following advantages:
the invention can break through the phenomenon that the existing composite optical film structure is easy to generate bad bubbles due to the shrinkage of the optical film at the edge of the product, thereby causing the problems of reduced appearance, performance, service life and the like of the product.
The optical pin designed by the invention can effectively reduce or even inhibit the shrinkage of the optical film, and can effectively improve the edge bubble defect generated by the shrinkage of the optical film, thereby improving the overall yield and productivity.
The optical pin designed by the invention can be made of the material with the same or similar refractive index as the optical film, which is beneficial to the better optical display effect of the product.
The objects, technical contents, features and effects achieved by the present invention will be more easily understood by the detailed description of the embodiments below.
Drawings
Fig. 1 is a schematic diagram of a composite optical film structure of the background art.
Fig. 2 is a microstructure of a composite optical film structure of the background art with defective bubbles due to shrinkage of the optical film.
FIG. 3 is a flow chart of a method for fabricating a composite optical film structure according to an embodiment of the present invention.
Fig. 4A to 4E are cross-sectional views of the structure of the composite optical film according to the embodiment of the invention, which are compared with each step in the manufacturing method of the composite optical film.
FIG. 5 is a top view of a composite optical film structure according to an embodiment of the present invention.
Fig. 6A and 6B are microstructure diagrams of a product of a composite optical film structure to which an embodiment of the present invention is applied, cut and photographed at different positions after a reliability test is performed.
The reference numerals are:
1 … substrate
2 … optical film
3 … optical cement
4 … optical cement
5 … air bubble
10 … first substrate
12 … first optical film
14 … third optical cement
20 … second substrate
22 … second optical film
24 … fourth optical cement
30 … open pore
40 … optical pin
50 … second optical cement
d … gap
S10-S50 … steps
Detailed Description
Embodiments of the present invention will be further illustrated by the following description in conjunction with 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. In the drawings, the shape and thickness may be exaggerated for simplicity and convenience. It will be appreciated that elements not specifically shown in the drawings or described in the specification are of a form known to those of ordinary skill in the art. Those skilled in the art will appreciate numerous changes and modifications in light of the teachings of the present invention.
As described in the prior art, the conventional composite optical film structure is prone to edge bubble defects caused by shrinkage of the optical film, which results in reduced product performance and process yield. In order to solve the above technical problems, the basic idea of the present invention is to provide a composite optical film structure and a manufacturing method thereof, which can effectively reduce or even inhibit shrinkage of an optical film through formation of optical pins, so that the problem of edge bubbles is improved.
FIG. 3 is a flow chart of a method for fabricating a composite optical film structure according to an embodiment of the invention; meanwhile, referring to fig. 4A to 4E, cross-sectional views of the composite optical film structure according to the embodiment of the invention are shown, which are compared with each step in the manufacturing method of the composite optical film structure; fig. 5 is a top view of a step of forming an opening in the method for manufacturing a composite optical film structure according to an embodiment of the invention. The following describes in detail the respective steps in the method for manufacturing a composite optical film structure according to an embodiment of the present invention.
First, in step S10, as shown in fig. 4A, the first optical film 12 is attached to the first substrate 10, and the second optical film 22 is attached to the second substrate.
Next, in step S20, as shown in fig. 4B, more than one opening 30 is formed. The openings 30 of the present invention pass through the first optical film 12 from the surface edge of the first optical film 12 and into the first substrate 10, or the openings 30 of the present invention pass through the second optical film 22 from the surface edge of the second optical film 22 and into the second substrate 20. In the present embodiment, the number of the openings 30 is plural, and some of the openings 30 penetrate through the first optical film 12 and enter the first substrate 10, and the rest of the openings 30 penetrate through the second optical film 22 and enter the second substrate 20. And as shown in fig. 5, the plurality of openings 30 of the present embodiment are spaced around the surfaces of the first optical film 12 and the second optical film 22.
Then, in step S30, as shown in fig. 4C, a first optical cement seal is formed in the opening 30 to form the optical pin 40. In the present embodiment, the first optical adhesive is sealed and formed in the plurality of openings 30 to form a plurality of optical pins 40, and the optical pins 40 are arranged at intervals along the periphery of the surfaces of the first optical film 12 and the second optical film 22, and pass through the first optical film 12 and the second optical film 22 respectively and then enter the first substrate 10 and the second substrate 20, so that the edges of the first optical film 12 and the second optical film 22 are not easy to shrink to cause defects of air bubbles.
Next, in step S40, as shown in fig. 4D, the first optical film 12 and the second optical film 22 are disposed opposite to each other with a gap D therebetween, and the first substrate 10 and the second substrate 20 are disposed opposite to each other.
Finally, referring to step S50, as shown in fig. 4E, a second optical adhesive 50 is formed in the gap d in a sealing manner, so that the first substrate 10 and the second substrate 20 are bonded to each other, thereby obtaining the composite optical film structure with the optical pin 40 in the present invention.
In step S10, the first substrate 10 and the second substrate 20 of the present invention may be transparent substrates, for example, the materials of the first substrate 10 and the second substrate 20 include, but are not limited to, plastics or glass. The types of the first optical film 12 and the second optical film 22 of the present invention include, but are not limited to, polarizers, filters, polymer film materials, and the like. In the embodiment of the present invention, a third optical adhesive 14 is formed between the first optical film 12 and the first substrate 10 to attach the first optical film 12 to the first substrate 10, and a fourth optical adhesive 24 is formed between the second optical film 22 and the second substrate 20 to attach the second optical film 22 to the second substrate 20. The third optical adhesive 14 and the fourth optical adhesive 24 of the present invention are solid optical adhesives, and have a light transmittance of about 90% or more. In the bonding process, the first optical film 12 and the second optical film 22 with larger dimensions are generally used first, and after the third optical adhesive 14 and the fourth optical adhesive 24 are respectively bonded to the first substrate 10 and the second substrate 20, the contours of the first optical film 12 and the second optical film 22 are cut according to the contours of the first substrate 10 and the second substrate 20 or the shape of the actual product, for example, the contours of the first optical film 12 and the second optical film 22 may be cut to be equal or slightly smaller than the contours of the first substrate 10 and the second substrate 20. As shown in fig. 4A, the profiles of the first optical film 12 and the second optical film 22 after being cut are smaller than those of the first substrate 10 and the second substrate 20, respectively.
In step S20, the step of forming the opening 30 according to the present invention may be performed using laser engraving, CNC machining, or mechanical drill machining. The depth of the openings 30 set in the embodiment of the present invention is 500 micrometers (μm), and the specific depth is not limited, but it is preferable that the depth of the openings 30 is not more than 1/3 of the thickness of the first substrate 10 or the second substrate 20, considering further the pinning effect of the optical pins 40 and minimizing the influence on the structure of the first substrate 10 and the second substrate 20.
In step S30 and step S50, the first optical adhesive and the second optical adhesive 50 of the present invention may be the same or different liquid optical adhesives, and the embodiment of the present invention uses a uv-curable liquid optical adhesive, which has a light transmittance similar to that of the third optical adhesive 14 and the fourth optical adhesive 24, and a light transmittance of about 90% or more, and has similar mechanical properties (e.g., tensile properties) to those of the third optical adhesive 14 and the fourth optical adhesive 24 after curing, so as to ensure the pinning effect. The first optical adhesive may be made of a material having the same or similar refractive index as that of the first optical film 12 and the second optical film 22, so that the formed optical pin 40 has similar optical properties to those of the first optical film 12 and the second optical film 22, so as to facilitate the product to exhibit better optical display effect.
Regarding the forming manner of the optical pin 40, in the above embodiment, before the first substrate 10 and the second substrate 20 are attached to each other, the first optical adhesive is filled in the opening 30 and then cured to form the optical pin 40; the material of the first optical adhesive of this embodiment may be different from that of the second optical adhesive 50. Alternatively, the first optical adhesive and the second optical adhesive 50 of the present invention may be the same liquid optical adhesive, and after step S40, that is, after the first optical film 12 and the second optical film 22 are disposed opposite to each other, the liquid optical adhesive is coated on the surface of the first optical film 12, and then the second optical film 22 is correspondingly bonded together for lamination, at this time, the liquid optical adhesive diffuses from the gap 26 between the first optical film 12 and the second optical film 22 to the periphery, diffuses into the openings 30, and then ultraviolet light is cured, so as to form the optical pins 40, and simultaneously the first substrate 10 and the second substrate 20 are bonded.
The following further details and verification of the efficacy of the present invention in connection with reliability testing are not to be construed as limiting the scope of the invention.
The present invention uses standard high temperature and high humidity conditions for reliability testing of products employing composite optical film structures with optical pins. After 504 hours of high temperature and high humidity testing, the appearance of the product was examined and no macroscopic edge bubbles were found. In addition, the product after the reliability test is cut at different positions to take a cross-sectional view to view the microstructure, as shown in fig. 6A and 6B, which show that the first optical film 12 bonded to the first substrate 10 by the third optical adhesive 14 is a significant optical film shrinkage phenomenon, so it can be illustrated that the optical pin of the present invention can significantly improve the problem of edge bubbles of the product with the composite optical film structure due to shrinkage of the optical film.
In summary, the composite optical film structure and the manufacturing method thereof provided by the invention form the optical pin by making the opening in the optical film, the optical pin can generate a physical fixing effect on the optical film and the substrate, and can effectively reduce or even inhibit the shrinkage of the optical film, thereby reducing or even eliminating the edge bubble defect generated by the shrinkage of the optical film, improving the overall yield and productivity, and increasing the competitive advantage and market share. In addition, the composite optical film structure and the manufacturing method thereof provided by the invention are suitable for the lamination process, the lens assembly and the flat panel or abnormal lamination display device, and have market potential.
The foregoing description is only of the preferred embodiment of the invention and is not intended to limit the scope of the invention. It is therefore intended that all such equivalent variations or modifications as fall within the spirit and scope of the invention as defined in the appended claims.

Claims (17)

1. A composite optical film structure comprising:
a first substrate;
a second substrate disposed opposite to the first substrate;
a first optical film attached to a surface of the first substrate opposite to the second substrate;
a second optical film attached to a surface of the second substrate opposite to the first substrate and disposed opposite to the first optical film with a gap therebetween;
an aperture through the first optical film from a surface edge of the first optical film and into the first substrate, or through the second optical film from a surface edge of the second optical film and into the second substrate;
an optical pin sealed and formed in the opening by a first optical adhesive; and
and a second optical adhesive formed in the gap in a sealing manner, so that the first substrate and the second substrate are mutually bonded, wherein the number of the open holes is a plurality, part of the open holes penetrate through the first optical film and enter the first substrate, and the rest of the open holes penetrate through the second optical film and enter the second substrate to form a plurality of optical pins.
2. The composite optical film structure of claim 1, wherein the openings have a depth of no more than 1/3 of the thickness of the first substrate or the second substrate.
3. The composite optical film structure of claim 1, wherein the first substrate and the second substrate are transparent substrates.
4. A composite optical film structure according to claim 3, wherein the first substrate and the second substrate are plastic or glass.
5. The composite optical film structure of claim 1, wherein the first optical adhesive and the second optical adhesive are liquid optical adhesives.
6. The composite optical film structure of claim 1, further comprising a third optical adhesive formed between the first optical film and the first substrate.
7. The composite optical film structure of claim 1, further comprising a fourth optical adhesive formed between the second optical film and the second substrate.
8. A method of manufacturing a composite optical film structure, comprising the steps of:
attaching the first optical film to the first substrate, and attaching the second optical film to the second substrate;
forming an aperture through the first optical film from a surface edge of the first optical film and into the first substrate, or through the second optical film from a surface edge of the second optical film and into the second substrate;
sealing the first optical cement in the opening to form an optical pin;
disposing the first optical film and the second optical film to face each other with a gap therebetween, and disposing the first substrate and the second substrate to face each other; and
and sealing and forming a second optical adhesive in the gap, so that the first substrate and the second substrate are mutually bonded.
9. The method of manufacturing a composite optical film structure of claim 8, wherein the number of openings is a plurality, some of the plurality of openings passing through the first optical film and into the first substrate, and the remaining openings passing through the second optical film and into the second substrate to form a plurality of the optical pins.
10. The method of claim 8, wherein the openings have a depth of no more than 1/3 of the thickness of the first substrate or the second substrate.
11. The method of claim 8, wherein the first substrate and the second substrate are transparent substrates.
12. The method of claim 11, wherein the first substrate and the second substrate are plastic or glass.
13. The method of claim 8, wherein the first optical adhesive and the second optical adhesive are liquid optical adhesives.
14. The method of claim 8, further comprising forming a third optical adhesive between the first optical film and the first substrate.
15. The method of claim 8, further comprising forming a fourth optical adhesive between the second optical film and the second substrate.
16. The method of claim 8, wherein the step of forming the openings is performed using laser engraving, CNC machining, or mechanical drill machining.
17. The method of claim 8, wherein the first optical adhesive and the second optical adhesive are the same liquid optical adhesive, and after the step of disposing the first optical film opposite the second optical film, the liquid optical adhesive is simultaneously sealed in the gap and the opening to form the optical pin.
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