CN114675354A - Optical imaging film, manufacturing method and electronic equipment cover plate carrying optical imaging film - Google Patents
Optical imaging film, manufacturing method and electronic equipment cover plate carrying optical imaging film Download PDFInfo
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- CN114675354A CN114675354A CN202011551327.XA CN202011551327A CN114675354A CN 114675354 A CN114675354 A CN 114675354A CN 202011551327 A CN202011551327 A CN 202011551327A CN 114675354 A CN114675354 A CN 114675354A
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- 238000012634 optical imaging Methods 0.000 title claims abstract description 43
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 239000000758 substrate Substances 0.000 claims abstract description 15
- 239000010410 layer Substances 0.000 claims description 68
- 239000000853 adhesive Substances 0.000 claims description 7
- 230000001070 adhesive effect Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 4
- 239000011241 protective layer Substances 0.000 claims description 4
- 239000004831 Hot glue Substances 0.000 claims description 3
- 238000003384 imaging method Methods 0.000 abstract description 50
- 230000000694 effects Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000012994 photoredox catalyst Substances 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0012—Arrays characterised by the manufacturing method
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/03—Covers
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Solid State Image Pick-Up Elements (AREA)
Abstract
The application provides an optical imaging film, a manufacturing method and an electronic equipment cover plate carrying the optical imaging film, wherein the imaging film comprises: the focusing layer is provided with a plurality of microlenses which are periodically or randomly arranged; the image-text layer is provided with a plurality of sub-images and texts which are arranged periodically or randomly; the micro lenses are matched with the sub-graphics one by one, the ratio of the scale factor of the micro lens coordinate to the sub-graphics coordinate in a planar state to a preset scale factor is satisfied, s/s ═ R + d/R, wherein R is curvature radius, and d is the thickness of the substrate layer, so that the ratio of the micro lens coordinate to the sub-graphics coordinate of the optical imaging film in a curved surface is the preset scale factor, and the optical imaging film can present the magnified image of the floating and/or sinking preset graphics and graphics without distortion of the image in a curved surface occasion. This expands the application of the imaging film.
Description
Technical Field
The application relates to the technical field of films, in particular to an optical imaging film which is located on a curved surface and can normally display images, a manufacturing method and an electronic equipment cover plate carrying the optical imaging film.
Background
With the development of imaging film technology, stereoscopic imaging films are widely used. At present, most of the materials are used in plane occasions. When the imaging film is used for curved surface occasions, the imaging film is attached to the surface of a curved surface object through adhesives such as adhesive sticker, and at the moment, the imaging pattern of the imaging film is locally distorted and deformed, so that the overall display effect of the imaging pattern is poor, and the attractiveness is affected. At present, no three-dimensional imaging film specially manufactured by taking a curved surface as a binding surface exists.
Therefore, there is a need for a new imaging film that can clearly display images on a curved surface.
Disclosure of Invention
In order to solve the above-mentioned drawbacks, the present application aims to: provided is a novel imaging film which is used for an imaging film that normally displays an image without distortion when curved.
In order to achieve the purpose, the technical scheme adopted by the application is as follows,
an optical imaging film, comprising: a focusing layer, a basal layer and an image-text layer which are sequentially stacked,
the focusing layer is provided with a plurality of micro lenses which are arranged periodically or randomly;
the image-text layer is provided with a plurality of sub-images and texts which are arranged periodically or randomly; the micro lenses are in one-to-one matching correspondence with the sub-texts,
and the scale factor of the microlens coordinate and the matched sub-image coordinate in the planar state meets the preset scale factor: s/s ═ R + d)/R,
wherein R is the curvature radius of the curved surface, d is the thickness of the substrate layer,
the optical imaging film can present a floating and/or sinking amplified image on the curved surface, and the image is not distorted. The application field of the imaging film is expanded.
In one embodiment, the optical imaging film further comprises a protective layer laminated on the side of the focusing layer away from the image-text layer.
In one embodiment, the optical imaging film further comprises an intermediate layer, one side of which covers the image-text layer, and the other side of which is used for connecting a curved object.
In one embodiment, the optical imaging film is attached to the curved surface by adhesive sticker, double-sided adhesive tape, hot melt adhesive or electrostatic adsorption.
In one embodiment, the optical imaging film is located between 2 curved surfaces with the same curvature, and is clamped and attached to the curved surfaces.
In one embodiment, the plurality of microlenses is a honeycomb-shaped microlens array.
The embodiment of the application provides a manufacturing method of an optical imaging film, which comprises the following steps:
calculating the scale factor of the local focusing layer and/or the image-text layer under the curved surface state according to the curvature model of the attached curved surface,
and pre-compensating the period and/or the image-text period of the micro-lens in the planar state based on the calculated scale factor, so that the ratio of the period of the micro-lens to the image-text period is a preset scale factor after the optical imaging film is attached to a curved surface.
In one embodiment, the method further comprises estimating the curvature of the curved surface to be affixed.
In one embodiment, the scale factor of the microlens coordinate and the matched sub-image coordinate of the optical imaging film in the planar state and the preset scale factor in the curved state satisfy: s/s ═ R + d)/R,
wherein, R is the curvature radius of the curved surface, and d is the thickness of the substrate layer.
The embodiment of the application provides an electronic equipment cover plate, which comprises the optical imaging film.
Advantageous effects
After the imaging film provided by the application is attached to a curved surface occasion, the local microlens period is stretched to a certain degree, so that the ratio of the microlens period Tr to the scale factor with the image-text period Tb is a preset scale factor, the formed image is not distorted, the imaging quality is improved, and the application occasion of the imaging film is expanded.
Drawings
In order to more clearly illustrate the embodiments of the present specification or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the specification, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise:
FIG. 1 is a schematic structural view of an imaging film according to an embodiment of the present disclosure in a planar state;
FIG. 2 is a schematic structural view of an imaging film according to an embodiment of the present disclosure in a curved state;
3-5 are schematic views of the imaging film of the present disclosure when attached to a curved surface;
FIG. 6 is a schematic view of an imaging film of an embodiment of the present application imaged while curved.
Detailed Description
In order to make those skilled in the art better understand the technical solutions proposed in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments in the present application, and not all of the embodiments. All other embodiments that can be derived by a person skilled in the art from one or more embodiments described herein without making any inventive step shall fall within the scope of protection of the present application.
The present application provides an imaging film, comprising: the focusing layer is provided with a plurality of microlenses which are arranged periodically or randomly; the image-text layer is provided with a plurality of sub-images and texts which are arranged periodically or randomly; the micro lenses are matched and corresponding to the sub-images one by one. In one embodiment, the sub-image is a preset image to form an enlarged image of the preset image; in another embodiment, the sub-image is a part of the pattern of the preset image and still can form an enlarged image of the preset image.
The ratio of the scale factor of the microlens coordinate and the sub-image coordinate in the planar state to the preset scale factor satisfies:
s/s ═ R + d)/R, where R is the radius of curvature and d is the thickness of the substrate layer, so that the ratio of the microlens coordinates to the sub-image coordinates of the optical imaging film in the curved state (also called the curved state) is a predetermined scale factor, and the optical imaging film presents a normal image in the curved surface field. Thereby expanding the application field of the imaging film. The base layer can be a substrate including PET, glass, PC, PMMA, PI, CPI, etc., or a non-substrate, the base layer is a residual glue layer after removing the focusing structure and the graphic structure.
The mechanism by which distortion occurs when a conventional imaging film is used on a curved surface is described below in conjunction with fig. 1 and 2, the imaging film comprising 100: the focusing layer 102, the substrate layer 101 and the image-text layer 103 are sequentially stacked, wherein the image-text layer is configured with a plurality of sub-images which are periodically arranged, and the focusing layer is matched with the image-text layer;
in the planar state, the microlens period is Tr, the image-text period is Tb, the thickness of the basal layer is d, and the scale factor s between the microlens period Tr and the image-text period Tb is Tb/Tr. In another embodiment, when the microlenses are randomly distributed in the planar state, the scale factor s is Db/Dr and is arranged in the form of a coordinate position.
To this end, applicants have developed an imaging film that includes: the focusing layer is provided with a plurality of microlenses which are periodically arranged or randomly arranged, and the image-text layer is provided with a plurality of sub-images which are periodically arranged or randomly arranged. According to the embodiment, the microlens period or the microlens period and the image-text period of the imaging film in the planar state are adjusted, so that the period of the microlens of the focusing layer of the imaging film in the curved surface occasion is stretched to a certain degree, and the proportion factor of the stretched microlens period Tr' to the image-text period Tb is the preset proportion factor, so that the imaging film can present a normal image in the curved surface occasion, the image is not distorted, and the imaging quality is improved. This expands the application of the imaging film. In the present embodiment, it is assumed that the thickness of the substrate does not change when the imaging film is bent within the predetermined curvature range, and the image-text period (Tb) does not change, and at this time, only the microlens period changes, and the period changes from Tr to Tr', and the change of the microlens period Tr is related to the curvature radius R (curvature in curved surface field), and the film thickness d of the substrate layer, and the larger the curvature radius R, the flatter the plane becomes, and the smaller the Tr changes. The thicker the base layer d, the larger the microlens period Tr when the radius of curvature is constant, and accordingly, when the curved surface function z is f (x, y) in the case of a complex curved surface, the following formula is calculated according to the radius of curvature:
whereby the radius of curvature R at a point in the two-dimensional plane is equal to
Thus, for an object with a known curvature, the period of the microlens is adjusted in advance according to the curvature model, and after the imaging film is attached to a curved surface (as shown in fig. 3), the imaging film 100 is attached to the curved object 200. In one embodiment, the imaging film further comprises a layer 104 disposed on the side of the focusing layer 102 away from the curved object 200. The focusing layer 102 is disposed on the base layer 101. The stretching of a certain degree of the local microlens period is carried out, the ratio of the microlens period Tr' to the scaling factor with the image-text period Tb is a preset scaling factor, the formed image is not distorted, and the imaging quality is improved. In this embodiment, the sub-image may be set as a predetermined pattern, such as E, to form an enlarged image of the predetermined pattern, such as enlarged E (see fig. 6); the graphics may also be arranged as part of the predetermined pattern, such as part of E, and still form an enlarged image of the predetermined pattern.
As a modification of the above embodiment, if the imaging film is used for a complex curved surface, the curvature of the complex curved surface is known, and thus the local magnification factor is processed according to the curvature model (curvature radius calculation formula) to calculate the local magnification factor, and the local parameter is compensated so that the image formed by using the imaging film for the complex curved surface is not distorted.
Next, an embodiment in which the floating image having a film thickness of 70um and a magnification of 150X is formed as an example of a flat image is shown in fig. 3, and the effect of bonding the image on a curved surface having a curvature radius of 35mm by pre-adjusting the period of the microlens is shown in fig. 6. It can be seen from fig. 6 that the optical imaging film can present a normal image E when used in a curved surface situation by pre-adjusting the microlens period of the focusing layer in a planar state.
In this embodiment, if R is 35mm and d is 70 μm, assuming that s is 1.0066 when the plane is normally displayed, s ' is 1.0066 × 35000/(35000+70) according to the formula, s ' is used when the plane is normally displayed, and when the plane is on a curved surface after the completion of the manufacturing, s ' is used, and when the plane is on a curved surface, the plane is normally displayed at 1.0066 because of 1.0066 × 35000/(35000+70) ] [ (35000+70)/35000 ].
The above embodiment is to pre-compensate the microlens period in the planar state. In other embodiments, the microlens period Tr' and the text period Tb can be a predetermined scale factor when the microlens period and the text period in the planar state are pre-compensated to be under a predetermined curved surface. In the planar state, the microlens period is Tr and the teletext period is Tb.
In one embodiment, the imaging film comprises an image-text layer, a substrate layer and a focusing layer, and the image-text period of the image-text layer in a planar state is pre-compensated, so that when the imaging film is under a preset curved surface, the ratio of the micro-lens period Tr' to the image-text period Tb is a preset scale factor.
The embodiment of the application provides a manufacturing method of an imaging film for a curved surface, which comprises the following steps:
and calculating the local magnification coefficient of the micro lens according to the curvature model of the attached curved surface, and making up the period of the micro lens in a plane state (such as blank compression between the micro lenses in advance) based on the calculated local magnification coefficient of the micro lens, so that the scale factor of the micro lens period Tr' and the image-text period Tb after the film is attached to the curved surface is a preset scale factor. Preferably, the coefficient in the planar state is estimated according to the known thickness d of the substrate layer and the curvature radius R in the case of a curved surface, i.e. the normal state (the scale factor in the curved surface), and s/s ═ R + d/R is satisfied (the estimation process can be referred to the description of the embodiment of fig. 6). Therefore, the ratio of the micro-lens coordinate to the sub-image coordinate of the optical imaging film in the curved surface state is a preset scale factor, and the optical imaging film presents a floating and/or sinking amplified image in the curved surface field without image distortion.
The base layer of the imaging film can be a substrate including PET, glass, PC, PMMA, PI, CPI, etc., or can be a non-substrate, and the base layer is a residual glue layer after removing the focusing structure and the graphic structure.
In one embodiment, the imaging film further comprises an intermediate layer, one side of which covers the image-text layer and the other side of which is used for connecting a curved object. Preferably, the imaging film is directly adhered by means of non-setting adhesive, double-sided adhesive, hot melt adhesive or the like, or adhered by means of electrostatic adsorption (as shown in fig. 5), or the imaging film is sandwiched by 2 curved surfaces with the same curvature, so that the imaging film is attached to the curved surface. In one embodiment, the focusing layer side of the imaging film is attached to the curved surface.
In one embodiment, the imaging film further includes a protective layer 104 (shown in FIG. 4) that is laminated to the focusing layer.
In one embodiment, the imaging film further comprises a reflective layer disposed on the side of the focusing layer away from the graphics layer. In one embodiment, the optical imaging film further comprises: and the ink layer is arranged on the side of the reflecting layer far away from the focusing layer.
In one embodiment, the plurality of microlenses arranged periodically or randomly are microlens arrays or fresnel lenses. Each focusing structure is a hemispherical bulge with the diameter of 20-1000 μm in a curved state.
In one embodiment, the microlenses are in the form of a honeycomb array of microlenses.
In one embodiment, the optical imaging film further comprises: and the protective layer is arranged on the outer side of the image-text layer.
The embodiment of the application provides an electronic equipment cover plate, which carries the imaging film. In other embodiments, the optical imaging film can be disposed on the surface of a product or an outer package, and can also be applied to the field of anti-counterfeiting.
The above embodiments are merely illustrative of the technical concepts and features of the present application, and the purpose of the embodiments is to enable those skilled in the art to understand the content of the present application and implement the present application, and not to limit the protection scope of the present application. All equivalent changes and modifications made according to the spirit of the present application are intended to be covered by the scope of the present application.
Claims (10)
1. An optical imaging film, comprising: a focusing layer, a basal layer and an image-text layer which are sequentially stacked,
the focusing layer is provided with a plurality of micro lenses which are arranged periodically or randomly;
the image-text layer is provided with a plurality of sub-images and texts which are arranged periodically or randomly; the micro lenses are in one-to-one matching correspondence with the sub-images,
and the scale factor of the microlens coordinate and the matched sub-image coordinate in the planar state meets the preset scale factor: s/s ═ R + d)/R,
wherein R is the curvature radius of the curved surface, d is the thickness of the substrate layer,
the optical imaging film is enabled to present a floating and/or sinking amplified image on the curved surface, and the image is not distorted.
2. The optical imaging film of claim 1, further comprising a protective layer laminated to a side of the focusing layer distal from the image-text layer.
3. The optical imaging film of claim 1, further comprising an intermediate layer having one side overlying the graphics layer and another side for attachment to a curved object.
4. The optical imaging film of claim 1, wherein the optical imaging film is attached to the curved surface by a non-setting adhesive, a double-sided adhesive, a hot melt adhesive, or electrostatic adhesion.
5. The optical imaging film of claim 1, wherein the optical imaging film is positioned between 2 curved surfaces of the same curvature and is attached to the curved surfaces by clamping.
6. The optical imaging film of claim 1, wherein the plurality of microlenses is in a honeycomb arrangement.
7. A method of making an optical imaging film, the method comprising:
calculating the scale factor of the local focusing layer and/or the image-text layer under the curved surface state according to the curvature model of the attached curved surface,
and pre-compensating the period and/or the image-text period of the micro-lens in the planar state based on the calculated scale factor, so that the ratio of the period of the micro-lens to the image-text period is a preset scale factor after the optical imaging film is attached to a curved surface.
8. The method of making an optical imaging film according to claim 7, wherein the method comprises: and estimating the curvature of the curved surface to be attached.
9. The method of making an optical imaging film according to claim 7,
the scale factor of the microlens coordinate and the matched sub-image coordinate of the optical imaging film in the planar state and the preset scale factor in the curved surface state meet the following conditions: s/s ═ R + d)/R,
wherein, R is the curvature radius of the curved surface, and d is the thickness of the substrate layer.
10. An electronic device cover comprising the optical imaging film according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011551327.XA CN114675354A (en) | 2020-12-24 | 2020-12-24 | Optical imaging film, manufacturing method and electronic equipment cover plate carrying optical imaging film |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011551327.XA CN114675354A (en) | 2020-12-24 | 2020-12-24 | Optical imaging film, manufacturing method and electronic equipment cover plate carrying optical imaging film |
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| CN114675354A true CN114675354A (en) | 2022-06-28 |
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| CN101221253A (en) * | 2006-12-28 | 2008-07-16 | 第一毛织株式会社 | Optical piece and display device containing the same |
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| US20180196166A1 (en) * | 2015-07-08 | 2018-07-12 | Shine Optoelectronics (Kunshan) Co., Ltd | Optical film |
| WO2020187285A1 (en) * | 2019-03-19 | 2020-09-24 | 中钞特种防伪科技有限公司 | Optical anti-counterfeiting element and optical anti-counterfeiting product |
| CN213903845U (en) * | 2020-12-24 | 2021-08-06 | 昇印光电（昆山）股份有限公司 | Optical imaging film and electronic equipment cover plate carrying same |
-
2020
- 2020-12-24 CN CN202011551327.XA patent/CN114675354A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1640749A2 (en) * | 2004-09-24 | 2006-03-29 | LG Electronics Inc. | Microlens array sheet and manufacturing method thereof |
| CN101221253A (en) * | 2006-12-28 | 2008-07-16 | 第一毛织株式会社 | Optical piece and display device containing the same |
| CN104191860A (en) * | 2014-08-27 | 2014-12-10 | 苏州大学 | Colored dynamic three-dimensional moire image thin film based on micro printing and preparation method thereof |
| US20180196166A1 (en) * | 2015-07-08 | 2018-07-12 | Shine Optoelectronics (Kunshan) Co., Ltd | Optical film |
| WO2020187285A1 (en) * | 2019-03-19 | 2020-09-24 | 中钞特种防伪科技有限公司 | Optical anti-counterfeiting element and optical anti-counterfeiting product |
| CN213903845U (en) * | 2020-12-24 | 2021-08-06 | 昇印光电（昆山）股份有限公司 | Optical imaging film and electronic equipment cover plate carrying same |
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