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CN108000989B - Cover glass laminated structure - Google Patents

Cover glass laminated structure Download PDF

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Publication number
CN108000989B
CN108000989B CN201610931674.2A CN201610931674A CN108000989B CN 108000989 B CN108000989 B CN 108000989B CN 201610931674 A CN201610931674 A CN 201610931674A CN 108000989 B CN108000989 B CN 108000989B
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China
Prior art keywords
layer
glass substrate
thickness
hardening
texture
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CN201610931674.2A
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CN108000989A (en
Inventor
唐根初
刘伟
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Anhui Jingzhuo Optical Display Technology Co Ltd
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Anhui Jingzhuo Optical Display Technology Co Ltd
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Priority to CN201610931674.2A priority Critical patent/CN108000989B/en
Publication of CN108000989A publication Critical patent/CN108000989A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00Layered 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
    • B32B7/04Interconnection of layers
    • B32B7/12Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Laminated Bodies (AREA)
  • Surface Treatment Of Glass (AREA)

Abstract

The invention relates to a cover plate glass laminated structure which comprises a glass substrate, an adhesive layer and a hardening layer, wherein the glass substrate comprises an inner surface and an outer surface which is spaced from the inner surface, the adhesive layer is adhered to the inner surface provided with the glass substrate, the hardening layer is formed on one surface, far away from the glass substrate, of the adhesive layer, the thickness of the hardening layer is 2-10 mu m, and the thickness of the adhesive layer is 5-100 mu m. The cover glass laminated structure without the PET substrate is adopted, wherein the thickness of the hardening layer is 2-10 mu, so that fewer attaching bubbles and lower wrinkle defects can be ensured. Further, the thickness of the hardening layer is more preferably more than or equal to 2 μm and less than 5 μm, and the effects of lower fracture, fewer attaching bubbles and lower wrinkle in the attaching process of the hardening layer and the glass substrate can be realized, so that the overall thickness of the cover plate glass laminated structure is thinned, and the trend demands of thinning and lightening electronic products with touch control functions are met.

Description

Cover glass lamination structure
Technical Field
The invention relates to the technical field of touch control, in particular to a cover plate glass lamination structure applied to a touch control product.
Background
At present, cover glass is widely applied to electronic products with touch control functions. A plurality of decorative film layers are usually arranged on the cover glass so that the cover glass meets specific appearance requirements, and the conventional decorative film layers with PET (polyethylene terephthalate) base materials can be adhered to the surface of the cover glass through an adhesive layer.
In order to meet the demands of thinning and lightening electronic products with touch control functions, a decorative film layer with a smaller thickness is adopted. How to use a thinner decorative film layer without losing the physical properties of the decorative film layer is a problem to be solved in the industry.
Disclosure of Invention
Based on this, it is necessary to provide a cover glass laminate structure that can solve the above-described problems.
A cover glass laminate structure comprising:
a glass substrate including an inner surface, an outer surface spaced from the inner surface;
an adhesive layer attached to an inner surface provided with the glass substrate;
A hardening layer formed on one surface of the adhesive layer away from the glass substrate;
The thickness of the hardening layer is 2-10 mu m, and the thickness of the bonding layer is 5-100 mu m.
In one embodiment, the hardened layer has a thickness of 2 μm or more and less than 5 μm.
In one embodiment, the thickness of the adhesive layer is 5-20 μm.
In one embodiment, the cover glass laminated structure further comprises a UV texture layer, an evaporation layer and an ink layer, and the hardening layer, the UV texture layer, the evaporation layer and the ink layer are laminated in sequence.
In one embodiment, the UV textured layer may form a drawn thread, CD or raised thread.
In one embodiment, the cover glass laminate structure further comprises a decorative layer formed between the glass substrate and the adhesive layer.
In one embodiment, the decorative layer is formed by silk screen printing.
In one embodiment, the decorative layer is a black ring, character or icon.
In one embodiment, when the decorative layer is a black ring, the black ring is an annular structure with circular through holes.
In one embodiment, the glass substrate has at least a portion of a curved surface.
The cover plate glass laminated structure provided by the invention has at least the following advantages:
The cover glass laminated structure without the PET substrate is adopted, and the thickness of the hardening layer contained in the cover glass laminated structure is 2-10 mu, so that fewer attaching bubbles and lower wrinkle defects can be ensured. Further, the thickness of the hardened layer is more preferably more than or equal to 2 μm and less than 5 μm, and the more preferable thickness can realize the effects of lower fracture, fewer attaching bubbles and lower wrinkle in the attaching process of the hardened layer and the glass substrate, thereby reducing the overall thickness of the cover plate glass laminated structure, and further meeting the trend demands of thinning and lightening electronic products with touch control functions.
Drawings
FIG. 1 is a schematic view of a laminated cover glass structure according to an embodiment of the present invention;
FIG. 2 is a schematic view of a laminated cover glass structure according to another embodiment of the present invention;
FIG. 3 is a schematic view of a glass substrate according to an embodiment of the present invention;
FIG. 4 is a schematic side view of a glass substrate according to an embodiment of the present invention;
FIG. 5 is a schematic view of a glass substrate according to another embodiment of the present invention;
FIG. 6 is a schematic view of a glass substrate according to another embodiment of the present invention;
FIG. 7 is a schematic view of a glass substrate according to another embodiment of the present invention;
FIG. 8 is a schematic side view of the curved glass panel of FIG. 7 in the W direction;
FIG. 9 is a schematic cross-sectional view of the curved glass panel of FIG. 8 taken along line A-A;
FIG. 10 is an end view of the curved glass panel of FIG. 7 in the L direction;
FIG. 11 is a schematic cross-sectional view of the curved glass panel of FIG. 10 taken along line B-B.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit or scope of the invention, which is therefore not limited to the specific embodiments disclosed below.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The cover glass laminated structure provided by the invention can be used as a display surface shell of electronic products with a touch function, wherein the electronic products comprise, but are not limited to, mobile phones, cameras, tablet computers, terminal displays and the like.
Fig. 1 is a schematic view of a laminated cover glass structure according to an embodiment of the present invention. Referring to fig. 1, the cover glass laminate structure includes a glass substrate 10, an adhesive layer 40 and a hardened layer 50.
The cover glass lamination structure further comprises a UV texture layer 60, an evaporation coating layer 70 and an ink layer 80, wherein the hardening layer 50, the UV texture layer 60, the evaporation coating layer 70 and the ink layer 80 are sequentially laminated.
The glass substrate 10 has opposing inner and outer surfaces 101 and 102. Specifically, in the present embodiment, the glass substrate 10 is a flat glass. The glass substrate 10 may take on a rectangular, circular, square, etc. shape depending on the electronic product to be applied.
In this embodiment, the inner surface 101 of the glass substrate 10 is a surface facing the inside of the electronic product, and the outer surface 102 is a surface facing the user. In some embodiments, a functional film layer such as an antireflection film, an anti-fingerprint film, etc. may be disposed on the outer surface 102 of the glass substrate 10 according to the requirements of antireflection, anti-fingerprint, etc. of the electronic product. The glass substrate 10 may be subjected to a strengthening treatment, and a hardened film layer may be provided on any one of the surfaces of the glass substrate 10.
The adhesive layer 40 has adhesion and is thin. Specifically, in this embodiment, the adhesive layer 40 is an optically clear (OCA, optically CLEAR ADHESIVE) adhesive. The adhesive layer 40 is attached to the inner surface 101 of the glass substrate 10. Specifically, in this embodiment, the thickness of the adhesive layer 40 is 5 to 100 μm. More preferably, the thickness of the adhesive layer 40 is 5 to 20 μm.
The hardened layer 50 is formed on one surface of the adhesive layer 40 remote from the glass substrate 10. As shown in table 1, the evaluation results for the hardened layers 50 of examples 1 to 7 are given.
TABLE 1
Thickness of hardened layer Poor fracture Poor lamination of bubbles and wrinkles
Example 1 0.5μm 22.5% 0.2%
Example 2 1μm 13.4% 0.4%
Example 3 2μm 5.1% 0.7%
Example 4 3μm 1.7% 1.1%
Example 5 5μm 0.9% 1.6%
Example 6 10μm 0.3% 5.3%
Example 7 20μm 0.1% 20.8%
The fracture defect is proportional to the thinness of the hardened layer, that is, the thinner the hardened layer is, the more likely the hardened layer is bonded to the glass substrate, the fracture defect occurs.
The bonding bubbles and wrinkles are proportional to the thickness of the hardened layer, i.e., the thicker the hardened layer, the more likely bubbles or wrinkles appear when the hardened layer is bonded to the glass substrate.
As shown in table 1, in examples 1 and 2, the cured layer was too thin, and the cured layer was laminated on the glass substrate, and was less likely to cause air bubbles or wrinkles, but was likely to cause folding. Thus, the cured layer in example 1 had a fracture defect of 22.5% and a lamination bubble and wrinkle defect of 0.2% at a thickness of 0.5. Mu.m, and the cured layer in example 2 had a fracture defect of 13.4% and a lamination bubble and wrinkle defect of 0.4% at a thickness of 1. Mu.m.
As shown in table 1, when examples 1 to 7 were compared with each other, it was confirmed that the cured layer thicknesses of examples 3 to 6 were preferably 2 to 10 μm, and that the preferable thicknesses ensured that the fracture defects were within an allowable range and that fewer adhering bubbles and fewer wrinkles were also ensured.
In the case of comparing examples 1 to 6 with each other, it was confirmed that the thickness of the hardened layer shown in examples 3 to 5 is 2 μm or more and less than 5 μm, and the more preferable thickness can achieve the effects of lower fracture, less lamination bubbles and lower wrinkles in the lamination process of the hardened layer and the glass substrate, thereby reducing the overall thickness of the cover glass laminate structure, and meeting the trend demands of thinning and lightening the electronic product with touch function.
The UV texture layer 60 is transferred on the hardened layer 50 by UV. Specifically, when forming the UV texture layer 60, UV glue may be coated on the formed hardened layer 50, and then the UV glue is embossed by a template to have a specific pattern, so that the UV glue has a specific pattern, for example, a specific pattern such as a silk drawing pattern, a CD pattern or a moire pattern is provided on the UV glue layer, and then a mask is applied to cure and clean the uncured UV glue, thereby obtaining the UV texture layer 60 formed on the hardened layer 50.
The evaporation layer 70 is disposed on the UV texture layer 60, and the evaporation layer 70 may be, for example, a film layer exhibiting a metallic color. By the pattern setting of the UV texture layer 60, the appearance with different patterns and colors can be observed on the outer surface 102 side of the glass substrate 10, and the metal texture is presented, so that the display effect of characters or icons is remarkably improved, and the user experience is improved.
After the structures such as the vapor deposition layer 70 are further disposed on the UV texture layer 60, the patterns presented by the UV texture layer 60 and the vapor deposition layer 70 can still be observed on the outer surface 102 side of the glass substrate 10 because the vapor deposition layer 70 is non-transparent and the UV texture layer 60 is transparent.
The ink layer 80 is disposed on the vapor layer 70. Since both the ink layer 80 and the vapor deposition layer 70 are opaque, when viewed from one side of the outer surface 102 toward the inner surface 101, the other side of the glass substrate 10 is not visible in the scene blocked by the ink layer 80 and the vapor deposition layer 70.
The cover glass laminate structure further includes a decorative layer 30, the decorative layer 30 being formed between the glass substrate 10 and the adhesive layer 40, specifically, the decorative layer 30 being formed by silk screen printing. In this embodiment, the decorative layer 30 is a black ring, the black ring is an annular structure with a circular through hole, and the black ring is directly formed on the glass substrate, so that visual influence caused by alignment errors of the camera is avoided, the procedure can be simplified, the alignment errors are reduced, the yield of products is effectively improved, and meanwhile, the visual influence caused by the alignment errors of the camera is avoided, so that the user experience is improved. It can be appreciated that in other embodiments, the decoration layer 30 may be a character or an icon, where the character or the icon is directly formed on the glass substrate by a silk-screen printing method, and compared with the situation that the character or the icon has defects such as tooth edge saw teeth when obtained by a direct exposure and development silk-screen printing method, the method provided by the invention can effectively reduce the defects caused by the direct exposure and development silk-screen printing method of the decoration layer, for example, the character or the icon, thereby effectively improving the yield of the product.
Fig. 2 is a schematic view of a laminated cover glass structure according to another embodiment of the present invention. Referring to fig. 2, the cover glass laminate structure includes a glass substrate 20, an adhesive layer 40, and a hardened layer 50.
The cover glass lamination structure further comprises a UV texture layer 60, an evaporation coating layer 70 and an ink layer 80, wherein the hardening layer 50, the UV texture layer 60, the evaporation coating layer 70 and the ink layer 80 are sequentially laminated.
Referring to fig. 3, the glass substrate 20 includes a planar portion 21 and curved portions 22 formed by bending and extending opposite edges of the planar portion 21 toward the same side surface of the planar portion 21. It is understood that in other embodiments, four edges of the glass substrate 20 may extend to form the curved surface portion 22, or one edge of the glass substrate 20 may extend to form the curved surface portion 22.
Referring to fig. 4, more specifically, the glass substrate 20 includes an inner surface 201, an outer surface 202 spaced from the inner surface 201, and a side surface 203 connecting the outer surface 202 and the inner surface 201. The inner surface 201 refers to the concave side and the outer surface 202 refers to the convex side. The inner surface 201 and the outer surface 202 each have a middle region and an edge region. In this embodiment, the plane portion 21 defines the middle area, the curved portion 22 defines the edge area, that is, the plane portion 21 is located in the middle area, and the curved portion 22 is located in the edge area. In other embodiments, the edge region may also be surrounding the middle region, such as when four edges of the glass substrate 20 are each extended to form the curved portion 22, the middle region being surrounded by the edge region.
The inner surface 201 also includes a flat surface portion 211 and curved surface portions 221 formed by bending and extending opposite edges of the flat surface portion 211 toward one side, respectively. The two curved surface portions 221 are symmetrically disposed with respect to the flat surface portion 211. The curved surface 221 has a circular arc in cross section. The radii of the two curved surface portions 221 may be equal or different. In this embodiment, the radii of the two curved surface portions 221 are equal. The radius of the two curved surface portions 221 is 1 to 50mm, preferably 5 to 50mm, more preferably 5 to 20mm, and even more preferably 5 to 10mm. The smaller the radius, the steeper the curved surface of the circular arc, and thus the formed glass substrate 20 has a stronger external 3D stereoscopic effect.
The outer surface 202 also includes a planar portion 212 and curved portions 222 formed by bending and extending opposite edges of the planar portion 212 toward one side. Wherein, the curved surface portion 222 of the outer surface 202 and the curved surface portion 221 of the inner surface 201 are both bent toward the same side, i.e., toward the side of the inner surface 201. The two curved surface portions 222 are symmetrically disposed with respect to the planar portion 212. The curved surface portion 222 has a circular arc in cross section. The radii of the two curved surface portions 222 may be equal or different. In this embodiment, the radii of the two curved surface portions 222 are equal. The radius of the two curved surface portions 222 is 1 to 50mm, preferably 5 to 50mm, more preferably 5 to 20mm, and even more preferably 5 to 10mm.
Wherein the positions of the plane parts 212 and the plane parts 211 correspond to each other and are the same in size, so that when the outer surface 202 of the glass substrate 20 is placed on a horizontal plane, the orthographic projections of the plane parts 211 and the plane parts 212 on the horizontal plane completely coincide.
More specifically, the radii of the curved surface portion 222 and the curved surface portion 221 are also equal. In this embodiment, the distance between the inner surface 201 and the outer surface 202, that is, the thickness of the glass substrate 20 is 0.2-1.0 mm. The thickness of the glass substrate 20 is uniform, so that stress concentration can be well eliminated, and the overall strength is improved. Preferably, the thickness of the glass substrate 20 is 0.5 to 0.7mm.
The angle between the tangent line of the point of the arc-shaped edge where the curved surface portion 222 is located and the plane portion 212 is defined as C angle, and C angle is 0 ° < C <90 °, preferably 0 ° < C <45 °. The angle C between the curved surface portion 221 and the flat surface portion 211 may be the same.
Further, the distance between the point of the arc edge of the curved surface 221 and the plane 212, i.e. the height H of the glass substrate 20, is 0.5 to 5mm.
In some embodiments, the glass substrate 20 is rectangular in front projection on a horizontal plane, wherein the rectangle is 50-500 mm long and 30-300 mm wide. The curved surface portions 221 and 222 are provided at both edges of the rectangle where the length is located.
In the embodiment shown in fig. 2 to 4, the curved surface portion 22 is formed by bending and extending opposite sides of the plane portion 21 toward one side. In other embodiments, the curved surface portion 22 forming an arc may be formed by bending and extending four sides of the planar portion 21 to one side. The curved surface portions 22 extending from the opposite sides may have the same radius or may have different radii. The radii of the curved surface portions 22 extending from the adjacent two sides may be equal or different. In the embodiment in which the four sides form the curved surface portion 22, other features may be provided with reference to the embodiment shown in fig. 2 to 4, which is not repeated.
Referring again to fig. 2, the adhesive layer 40 is adhesive and thin. Specifically, in this embodiment, the adhesive layer 40 is an optically clear (OCA, optically CLEAR ADHESIVE) adhesive. An adhesive layer 40 is attached to an inner surface provided with the glass substrate 20. Specifically, in this embodiment, the thickness of the adhesive layer 40 is 5 to 100 μm. More preferably, the thickness of the adhesive layer 40 is 5 to 20 μm.
The hardened layer 50 is formed on one surface of the adhesive layer 40 remote from the glass substrate 20. As shown in table 1, the evaluation results for the hardened layers 50 of examples 1 to 7 are given.
TABLE 1
Thickness of hardened layer Poor fracture Poor lamination of bubbles and wrinkles
Example 1 0.5μm 22.5% 0.2%
Example 2 1μm 13.4% 0.4%
Example 3 2μm 5.1% 0.7%
Example 4 3μm 1.7% 1.1%
Example 5 5μm 0.9% 1.6%
Example 6 10μm 0.3% 5.3%
Example 7 20μm 0.1% 20.8%
The fracture defect is proportional to the thinness of the hardened layer, that is, the thinner the hardened layer is, the more likely the hardened layer is bonded to the glass substrate, the fracture defect occurs.
The bonding bubbles and wrinkles are proportional to the thickness of the hardened layer, i.e., the thicker the hardened layer, the more likely bubbles or wrinkles appear when the hardened layer is bonded to the glass substrate.
As shown in table 1, in examples 1 and 2, the cured layer was too thin, and the cured layer was laminated on the glass substrate, and was less likely to cause air bubbles or wrinkles, but was likely to cause folding. Thus, the cured layer in example 1 had a fracture defect of 22.5% and a lamination bubble and wrinkle defect of 0.2% at a thickness of 0.5. Mu.m, and the cured layer in example 2 had a fracture defect of 13.4% and a lamination bubble and wrinkle defect of 0.4% at a thickness of 1. Mu.m.
As shown in table 1, when examples 1 to 7 were compared with each other, it was confirmed that the cured layer thicknesses of examples 3 to 6 were preferably 2 to 10 μm, and that the preferable thicknesses ensured that the fracture defects were within an allowable range and that fewer adhering bubbles and fewer wrinkles were also ensured.
In the case of comparing examples 1 to 6 with each other, it was confirmed that the thickness of the hardened layer shown in examples 3 to 5 is 2 μm or more and less than 5 μm, and the more preferable thickness can achieve the effects of lower fracture, less lamination bubbles and lower wrinkles in the lamination process of the hardened layer and the glass substrate, thereby reducing the overall thickness of the cover glass laminate structure, and meeting the trend demands of thinning and lightening the electronic product with touch function.
The UV texture layer 60 is transferred on the hardened layer 50 by UV. Specifically, when forming the UV texture layer 60, UV glue may be coated on the formed hardened layer 50, and then the UV glue is embossed by a template to have a specific pattern, so that the UV glue has a specific pattern, for example, a specific pattern such as a silk drawing pattern, a CD pattern or a moire pattern is provided on the UV glue layer, and then a mask is applied to cure and clean the uncured UV glue, thereby obtaining the UV texture layer 60 formed on the hardened layer 50.
The evaporation layer 70 is disposed on the UV texture layer 60, and the evaporation layer 70 may be, for example, a film layer exhibiting a metallic color. By the pattern setting of the UV texture layer 60, the appearance with different patterns and colors can be observed on the outer surface 202 side of the glass substrate 20, and the metal texture is presented, so that the display effect of characters or icons is remarkably improved, and the user experience is improved.
After the structures such as the vapor deposition layer 70 are further disposed on the UV texture layer 60, the patterns presented by the UV texture layer 60 and the vapor deposition layer 70 can still be observed on the outer surface 202 side of the glass substrate 20 because the vapor deposition layer 70 is non-transparent and the UV texture layer 60 is transparent.
The ink layer 80 is disposed on the vapor layer 70. Since both the ink layer 80 and the vapor deposition layer 70 are opaque, when viewed from one side of the outer surface 202 toward the inner surface 201, the other side of the glass substrate 20 is not visible in the scene blocked by the ink layer 80 and the vapor deposition layer 70.
The cover glass laminate structure further includes a decorative layer 30, the decorative layer 30 being formed between the glass substrate 20 and the adhesive layer 40, specifically, the decorative layer 30 being formed by silk screen printing. In this embodiment, the decorative layer 30 is a black ring, the black ring is an annular structure with a circular through hole, and the black ring is directly formed on the glass substrate, so that visual influence caused by alignment errors of the camera is avoided, the procedure can be simplified, the alignment errors are reduced, the yield of products is effectively improved, and meanwhile, the visual influence caused by the alignment errors of the camera is avoided, so that the user experience is improved. It can be appreciated that in other embodiments, the decorative layer 30 may be a character or an icon, where the character or the icon is formed on the glass substrate by a silk-screen printing method, and compared with a situation that the character or the icon is provided with a tooth edge saw tooth or the like by directly exposing and developing the character or the icon by silk-screen printing, the method provided by the invention can effectively reduce the defects caused by the decorative layer, such as the character or the icon, in the direct exposing and developing silk-screen printing method, thereby effectively improving the yield of the product.
In other embodiments, the glass substrate 20 is not limited to the structure shown in fig. 1-4. For example, fig. 5 and 6 show a glass substrate of another embodiment, which includes an inner surface 201a, an outer surface 202a spaced from the inner surface 201a, and a side circumferential surface (not labeled) connecting the outer surface 202a and the inner surface 201 a.
The distance between the inner surface 201a and the outer surface 202a is 0.2 to 1.0mm, that is, the thickness of the glass substrate is 0.2 to 1.0mm.
The inner surface 201a has a central axis 203a, and the inner surface 201a is symmetrically disposed along the central axis 203 a. The outer surface 202a also has a central axis 204a, and the outer surface 202a is disposed symmetrically along the central axis 204 a.
The inner surface 201a is curved to the same side with the central axis 203a of the inner surface 201a as the center to form an inner curved surface of an arc, the outer surface 202a is curved to the same side with the central axis 204a of the outer surface 202a as the center to form an outer curved surface of an arc, the radius R of the inner curved surface and the outer curved surface is 50-1000 mm, and the height H of the glass substrate is 0.5-5 mm.
In some embodiments, the radii R of the inner and outer curved surfaces are equal, i.e., the thickness is uniform throughout the glass substrate. Therefore, stress concentration can be better eliminated, and the overall strength is improved.
The height H of the glass substrate refers to the distance between the plane of the two parallel sides 205a, 206a of the inner surface 201a farthest from the central axis 203a and the central axis 204a of the outer surface 202 a.
In some embodiments, the angle between the two parallel sides 205a, 206a of the inner surface 201a in the shape of a circular arc and the line connecting the centers of the circular arc, i.e. the central angle corresponding to the circular arc where the inner surface 201a is located, is denoted by C, wherein 60 ° < C <180 °. The central angle C corresponding to the arc of the outer surface 202a also satisfies 60 ° < C <180 °.
A further embodiment of a glass substrate is shown in fig. 7, and referring to fig. 8 and 9, the glass substrate includes an inner surface 201b, an outer surface 202b spaced from the inner surface 201b, and a side circumferential surface (not labeled) connecting the outer surface 202b and the inner surface 201 b.
The distance between the inner surface 201b and the outer surface 202b is 0.2 to 1.0mm, that is, the thickness of the glass substrate is 0.2 to 1.0mm.
The inner surface 201b has a centerline W1 in the width direction, and the outer surface 202b also has a centerline W2 in the width direction. The inner surface 201b is mirror symmetric along the center line W1. The outer surface 202b is mirror symmetric about the centerline W2. The glass substrate is placed on a horizontal plane, the glass substrate is orthographic projected on the horizontal plane, and the center line W1 of the inner surface 201b and the center line W2 of the outer surface 202b are overlapped in the orthographic projection direction of the glass substrate.
Referring to fig. 10 and 11, the inner surface 201b has a center line L1 in the length direction, and the outer surface 202b also has a center line L2 in the length direction. The inner surface 201b is mirror symmetric along the center line L1. The outer surface 202b is mirror symmetric about the centerline L2. The glass substrate is placed on a horizontal plane, the glass substrate is orthographic projected on the horizontal plane, and the center line L1 of the inner surface 201b and the center line L2 of the outer surface 202b are overlapped in the orthographic projection direction of the glass substrate. The orthographic projections of the centerlines L1, L2 are perpendicular to the orthographic projections of the centerlines W1, L2.
The inner surface 201b is curved to the same side about a longitudinal center line L1, and the outer surface 202b is also curved to the same side about a longitudinal center line L2. The radius of the circular arc of the center line L1 in the longitudinal direction of the inner surface 201b is 50 to 1000mm, and the radius of the circular arc of the center line L2 in the longitudinal direction of the outer surface 202b is also 50 to 1000mm. In the embodiment shown in the drawings, the center lines L1, L2 of the inner surface 201b and the outer surface 202b in the longitudinal direction have the same radius of circular arcs.
The inner surface 201b is also curved to the same side about a center line W1 in the width direction, and the outer surface 202b is also curved to the same side about a center line W2 in the width direction. The radius of the circular arc of the center line W1 in the width direction of the inner surface 201b is 50 to 1000mm, and the radius of the circular arc of the center line W2 in the width direction of the outer surface 202b is also 50 to 1000mm. The center lines W1, W2 of the inner surface 201b and the outer surface 202b in the width direction have the same radius of arc.
The height of the glass substrate is 0.5-5 mm. The height refers to a distance between a center point of the outer surface 202b (i.e., an intersection point of a center line L2 in the length direction and a center line W2 in the width direction) to a plane formed by at least three points at which the inner surface 201 is located lowest. In the embodiment shown in the figures, the four corners of the inner surface 201b lie in the same plane, i.e. the distance between the plane in which the four corners lie and the center point of the outer surface 202 b.
In some embodiments, the glass substrate is uniform in thickness throughout. Therefore, stress concentration can be better eliminated, and the overall strength is improved.
The radius of the circular arcs of the center lines W1, W2 may be equal to or different from the radius of the circular arcs of the center lines L1, L2.
In some embodiments, the circular arcs of the centerlines L1, L2 of the inner surface 201b and the outer surface 202b in the length direction correspond with a central angle C1, wherein 60 ° < C1<180 °. The central angle corresponding to the circular arcs of the centerlines W1, W2 of the inner surface 201b and the outer surface 202b in the width direction is C2, wherein 60 ° < C2<180 °.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The cover plate glass laminated structure provided by the invention has at least the following advantages:
The cover glass laminated structure without the PET substrate is adopted, and the thickness of the hardening layer contained in the cover glass laminated structure is 2-10 mu, so that fewer attaching bubbles and lower wrinkle defects can be ensured. Further, the thickness of the hardened layer is more preferably more than or equal to 2 μm and less than 5 μm, and the more preferable thickness can realize the effects of lower fracture, fewer attaching bubbles and lower wrinkle in the attaching process of the hardened layer and the glass substrate, thereby reducing the overall thickness of the cover plate glass laminated structure, and further meeting the trend demands of thinning and lightening electronic products with touch control functions.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims (6)

1. The cover plate glass laminated structure is characterized by comprising a glass substrate, an adhesive layer, a hardening layer, a UV texture layer, a vapor deposition layer, an ink layer and a decorative layer;
the glass substrate includes an inner surface, an outer surface spaced from the inner surface;
The adhesive layer is adhered to the inner surface provided with the glass substrate;
The hardening layer is formed on one surface of the adhesive layer, which is far away from the glass substrate;
wherein the thickness of the hardening layer is 2-10 mu m, and the thickness of the bonding layer is 5-100 mu m;
The ultraviolet radiation type glass substrate comprises a hardening layer, an Ultraviolet (UV) texture layer, a vapor deposition layer and an ink layer, wherein the hardening layer, the UV texture layer, the vapor deposition layer and the ink layer are sequentially laminated, the vapor deposition layer is non-transparent, the vapor deposition layer is a film layer with metal color, the UV texture layer is transparent, the UV texture layer is transferred on the hardening layer through Ultraviolet (UV), the decorative layer is formed between the glass substrate and the adhesive layer, the decorative layer is a black ring, and the black ring is of an annular structure with circular through holes.
2. The cover glass laminate structure according to claim 1, wherein the hardened layer has a thickness of 2 μm or more and less than 5 μm.
3. The cover glass laminate structure according to claim 1, wherein the thickness of the adhesive layer is 5-20 μm.
4. The cover glass laminate structure of claim 1 wherein the UV textured layer can form a drawn thread, a CD thread, or a raised thread.
5. The cover glass laminate structure of claim 1 wherein the decorative layer is formed by silk screening.
6. The cover glass laminate structure of any one of claims 1 to 5 wherein the glass substrate has at least a partially curved surface.
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CN204695276U (en) * 2015-05-27 2015-10-07 江峰维 Transparent structures with textured appearance
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