CN111708110A - Preparation method of diffuser, diffuser and camera module - Google Patents
Preparation method of diffuser, diffuser and camera module Download PDFInfo
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- CN111708110A CN111708110A CN202010563682.2A CN202010563682A CN111708110A CN 111708110 A CN111708110 A CN 111708110A CN 202010563682 A CN202010563682 A CN 202010563682A CN 111708110 A CN111708110 A CN 111708110A
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- diffuser
- gel layer
- gel
- bearing plate
- curing
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0268—Diffusing elements; Afocal elements characterized by the fabrication or manufacturing method
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
Abstract
The embodiment of the application discloses preparation method and a diffuser and camera module of diffuser, include: s101, providing a bearing plate, and coating a gel-state material on the bearing plate to form a gel layer; s102, providing a micro lens, and arranging the micro lens on the surface of the gel layer, which is deviated from the bearing plate; s103, curing the gel layer provided with the micro lenses; and S104, demolding the bearing plate to separate the bearing plate from the solidified gel layer. Therefore, the technical scheme of the application directly takes the photosensitive material in the gel state as the base material, and the base material and the microlens are integrally formed after the curing treatment. In addition, the technical scheme of the application can solve the problem that a joint surface is generated in the manufacturing process of the diffuser in the related technology, thereby ensuring the product quality of the diffuser and improving the use experience of users.
Description
Technical Field
The application relates to the technical field of diffusers, in particular to a diffuser, a preparation method thereof and a camera module.
Background
The diffuser is a device with functions of refracting, reflecting and scattering light rays, and can change the traveling route of light and achieve the effect of optical diffusion by fully dispersing incident light. The diffuser comprises a hard substrate, a coating layer arranged on the substrate and a micro lens positioned on the surface of the coating layer.
However, in the curing process of the diffuser process in the related art, a bonding surface is formed after the substrate and the coating are cured, and the substrate and the coating fall off at the bonding surface in a cold and hot impact environment at-40 to 80 ℃, so that the diffuser has a serious product quality problem and cannot work normally, and the use experience of a user is affected.
Content of application
The application provides a method for preparing a diffuser, which can effectively solve the problem of generating a joint surface in the process of manufacturing the diffuser.
In a first aspect, embodiments of the present application provide a method for manufacturing a diffuser, including: providing a bearing plate, and coating a gel-state material on the bearing plate to form a gel layer; providing a micro lens and arranging the micro lens on the surface of the gel layer, which is far away from the bearing plate; curing the gel layer provided with the microlenses; and (4) carrying out demoulding treatment on the bearing plate to enable the bearing plate to be separated from the solidified gel layer.
In this embodiment, the photosensitive material in a gel state is directly used as the substrate, and is integrally formed with the microlens after being cured. Therefore, the diffuser prepared by the preparation method has the characteristics of high structural strength and good reliability, so that the product quality of the diffuser is ensured, and the use experience of a user is improved.
In some of these embodiments, a release agent is applied to the surface of the carrier sheet that is used to apply the gel state material prior to applying the gel state material to the carrier sheet.
Based on the embodiment, the coated release agent can form an interface coating between the bearing plate and the gel layer to prevent the bearing plate and the gel layer from being connected into a whole in the curing process, and the release agent is coated on the surface of the bearing plate for arranging the gel layer, so that the diffuser can be separated from the bearing plate and the surface of the bearing plate can be kept smooth and clean, and the bearing plate can be conveniently used subsequently. Therefore, the integrity of the diffuser and the product quality of the diffuser can be effectively ensured by coating the release agent on the bearing plate.
In some of these embodiments, the application comprises multiple applications to form multiple gel layers in the direction of the carrier plate pointing towards the gel state material.
Based on the embodiment, the flatness of the single-layer gel layer can be guaranteed by coating for multiple times, and meanwhile, the overall flatness of the multiple-layer gel layer can be guaranteed.
In some of these embodiments, each gel layer has a maximum thickness dimension of 0.15 mm.
Based on the above embodiment, the thickness dimension of each gel layer is not more than 0.15mm, which not only can accurately control the flatness of a single gel layer, but also can maintain the overall flatness of a plurality of gel layers.
In some of these embodiments, the materials used in multiple applications are the same material.
Based on the embodiment, the materials used in multiple times of coating are the same, so that the multiple gel layers can be better integrally connected after the curing treatment.
In some of these embodiments, the multiple gel layers are integrally connected after curing.
Based on the above embodiment, the plurality of gel layers can be integrally connected after being cured, so that the structural strength of the diffuser is obviously improved.
In some embodiments, the carrier plate is made of glass.
Based on the above embodiment, the glass carrier plate has better light transmittance, so that the light of the curing light source can penetrate through the carrier plate to irradiate the gel layer.
In some of these embodiments, the light source of the curing process is located on the side of the carrier plate facing away from the gel layer.
Based on the above embodiment, the problem that the micro lens on the surface of the gel layer departing from the bearing plate blocks the curing light source can be effectively avoided in the embodiment, so that the curing effect of curing treatment is improved, and the connection strength of the gel layer and the micro lens is ensured.
In some of these embodiments, the gel state material is a photosensitive adhesive, and the curing process includes curing the gel state photosensitive adhesive by irradiation with an ultraviolet light source.
Based on the above embodiments, the ultraviolet curing has the advantageous effects of simple operation, broad spectrum, high efficiency, and no secondary pollution.
In some of these embodiments, the curing process has a plurality of light sources.
Based on the above embodiment, a plurality of light sources are arranged, so that the speed of curing treatment of the diffuser can be remarkably improved, the production efficiency of the diffuser is improved, and the mass production is favorably realized.
In a second aspect, the present disclosure provides a diffuser prepared by the above method, the diffuser includes a substrate plate and a microlens, the substrate plate includes an incident surface and an exit surface opposite to the incident surface, the microlens is located on the exit surface, and the diffuser is configured such that light incident on the incident surface is dispersed after passing through the microlens.
The diffuser based on this application embodiment, its structural strength is showing and is improving, is favorable to guaranteeing the product quality of diffuser and user's use experience.
In a third aspect, the present application provides a camera module, which includes the above-mentioned diffuser.
According to the camera module, the working reliability of the camera module is remarkably improved, the service life of the camera module is prolonged, and the use experience of a user is improved.
The application provides a diffuser preparation method, which comprises the following steps: s101, providing a bearing plate, and coating a gel-state material on the bearing plate to form a gel layer; s102, providing a micro lens, and arranging the micro lens on the surface of the gel layer, which is deviated from the bearing plate; s103, curing the gel layer provided with the micro lenses; and S104, demolding the bearing plate to separate the bearing plate from the solidified gel layer. Therefore, the technical scheme of this application directly uses the photosensitive material of gel state as the substrate, and its solidification is handled after and microlens integrated into one piece, and this application technical scheme can eliminate the problem that produces the faying face in the diffuser processing procedure of correlation technique to guarantee the product quality of diffuser, promoted user's use and experienced.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings 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 of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a sectional view of a diffuser structure according to the related art;
FIG. 2 is an enlarged view of a portion of the diffuser structure of the related art of FIG. 1, illustrating the relative positions of the bonding surface and the substrate and the photosensitive material coating;
FIG. 3 is a schematic view of a process for preparing a diffuser according to a first embodiment of the present application;
FIG. 4 is a cross-sectional view of a diffuser according to a second embodiment of the present application, illustrating the relative position between the diffuser and the carrier plate during the preparation process;
FIG. 5 is a cross-sectional view of a diffuser according to a second embodiment of the present application, wherein the diffuser is illustrated in relation to the mold, the carrier plate and the light source during the manufacturing process;
FIG. 6 is a cross-sectional view of a diffuser according to a second embodiment of the present application, illustrating a plurality of light sources;
fig. 7 is a cross-sectional structural view of a diffuser according to a second embodiment of the present application, in which the relative positional relationship between a plurality of light sources and the diffuser is illustrated.
It should be noted that the thicknesses, sizes and shapes of the diffuser, the mold, the carrier plate and the light source in the above-described drawings are exaggerated for convenience of explanation. Specifically, the shapes of the components shown in the drawings are merely for schematically illustrating the connection and positional relationship between the components, and are not strictly drawn according to the specific shapes of the components.
The attached drawings indicate the following:
100. a diffuser 110, a first gel layer, 120, a second gel layer, 130, a third gel layer, 140, a fourth gel layer, 150, a microlens 200, a carrier plate 210, a first surface 300, a mold 400, a light source 110a, a substrate 120a, a photosensitive material coating 130a, a microlens 140a, and a bonding surface.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The diffuser is a device with functions of refracting, reflecting and scattering light rays, and can change the traveling route of light and achieve the effect of optical diffusion by fully dispersing incident light. As shown in fig. 1-2, the related art diffuser 100 includes a substrate 110a, a coating layer 120a disposed on the substrate 100a, and a microlens 130a disposed on a surface of the coating layer 120a facing away from the substrate 110a, wherein the substrate 110a is a hard material.
In the process of implementing the diffuser 100 in the above related art, the inventors found that, in the curing process of the manufacturing process of the diffuser 100 in the related art, the bonding surface 140a is formed after the substrate 110a and the coating layer 120a are cured, and in the cold and hot impact environment at-40 to 80 degrees celsius, the substrate 110a and the coating layer 120a may fall off at the bonding surface 140a, which causes a serious product quality problem of the diffuser 100 and may not work normally, thereby affecting the user experience.
In view of the above technical problem, as shown in fig. 3, a first embodiment of the present application provides a method for manufacturing a diffuser, including:
s101, providing a bearing plate, and coating a gel-state material on the bearing plate to form a gel layer;
s102, providing a micro lens, and arranging the micro lens on the surface of the gel layer, which is deviated from the bearing plate;
s103, curing the gel layer provided with the micro lenses;
and S104, demolding the bearing plate to separate the bearing plate from the solidified gel layer.
According to the technical scheme of the embodiment of the application, the gel-state photosensitive material is directly used as the base material, and the base material and the micro lens are integrally formed after curing treatment. Therefore, the technical scheme of the application can eliminate the problem of generating a joint surface in the manufacturing process of the diffuser in the related technology, thereby ensuring the product quality of the diffuser and improving the use experience of a user. It should be noted that the carrier plate in this embodiment serves as a support device for the gel layer during the manufacturing process of the diffuser, and does not form a part of the diffuser after the manufacturing process.
To facilitate the release treatment of the diffuser, in the embodiments of the present application, a release agent may be applied to the surface of the carrier plate on which the gel state material is applied, before the gel state material is applied to the carrier plate.
The coated release agent can form an interface coating between the bearing plate and the gel layer to prevent the bearing plate and the gel layer from being connected into a whole in the curing process, and the release agent is coated on the surface of the bearing plate for arranging the gel layer, so that the diffuser can be separated from the bearing plate and the surface of the bearing plate can be kept smooth and clean, and the bearing plate can be conveniently used subsequently. Therefore, the integrity of the diffuser and the product quality of the diffuser can be effectively ensured by coating the release agent on the bearing plate.
In the above application embodiments, the applying may include multiple applying, and the multiple applying of the gel-state material may form multiple gel layers in a direction of the carrier plate toward the gel-state material. Wherein the maximum thickness dimension of each gel layer is 0.15 mm.
In the embodiment of the application, the thickness of each gel layer is not more than 0.15mm, so that the flatness of a single gel layer can be accurately controlled, and the integral flatness of a plurality of gel layers can be maintained. Wherein, the materials used by multiple smearing are the same materials, so that the multiple gel layers are integrally connected after curing treatment.
In order to ensure the curing effect of the curing treatment, in the embodiment of the present application, the material of the bearing plate may be glass. The glass bearing plate has better light transmittance, so that light rays of the curing light source can penetrate through the bearing plate to irradiate the gel layer. It should be noted that the material of the carrier plate is glass in the embodiments of the present application for illustrative purposes only, and the specific material of the carrier plate should match the light band of the curing light source, i.e. the light transmittance of the carrier plate corresponds to the light band of the curing light source.
Wherein, the light source of solidification treatment can be located the one side that deviates from the gel layer of loading board to avoid being located the microlens on the surface that deviates from the loading board of gel layer and sheltering from the light of solidification light source, thereby promote the solidification effect of solidification treatment, guarantee the joint strength of gel layer and microlens.
Specifically, in the embodiment of the present application, the gel-state material may be a photosensitive adhesive, and the curing process includes, but is not limited to, irradiating the photosensitive adhesive in the gel state with an ultraviolet light source, so that the photosensitive adhesive generates a radical reaction under the ultraviolet light condition to achieve an integral connection between the gel layer and the microlens.
In order to improve the efficiency of the curing treatment of the diffuser, in the embodiment of the present application, the number of the light sources of the curing treatment may be multiple, and the multiple light source arrays are arranged on the side of the carrying plate away from the gel layer.
In the embodiment of the application, the light sources with a plurality of numbers are arranged, so that the curing treatment speed of the diffuser can be obviously improved, the production efficiency of the diffuser is improved, and the mass production is favorably realized. Without being limited thereto, it is also possible to make a plurality of light sources uniform in number on the peripheral side of the gel layer to further increase the rate of the curing process.
According to the present invention, as shown in FIG. 4, the manufacturing process of the diffuser 100 including the final product (the diffuser 100) and the auxiliary tool (the carrier plate 200) in the manufacturing process is described in the second embodiment of the present invention with reference to the drawings of the structural features. The diffuser 100 includes a first gel layer 110, a second gel layer 120, a third gel layer 130, a fourth gel layer 140, and microlenses 150. The carrier plate 200 has a first surface 210 for disposing a gel layer, the first gel layer 110 is located on the first surface 210 of the carrier plate 200, the second gel layer 120 is located on a surface of the first gel layer 110 facing away from the carrier plate 200, the third gel layer 130 is located on a surface of the second gel layer 120 facing away from the first gel layer 110, and the fourth gel layer 140 is located on a surface of the third gel layer 130 facing away from the second gel layer 120.
In the embodiment of the present application, the materials of the first gel layer 110, the second gel layer 120, the third gel layer 130, and the fourth gel layer 140 are photosensitive adhesives, the thickness of the first gel layer 110 is 0.15mm of photosensitive adhesives, the thickness of the second gel layer 120 is 0.13mm of photosensitive adhesives, the thickness of the third gel layer 130 is 0.12mm of photosensitive adhesives, and the thickness of the fourth gel layer 140 is 0.1mm of photosensitive adhesives.
Specifically, in the embodiment of the present application, the spin coater may be used to coat the photosensitive adhesive, for example, after the spin coater coats the photosensitive adhesive with a thickness of 0.15mm to form the first gel layer 110, the spin coater carrier drives the carrier plate 200 and the first gel layer 110 to descend by 0.15mm together, then the photosensitive adhesive is added and the second gel layer 120 with a thickness of 0.13mm is coated on the surface of the first gel layer 110 away from the carrier plate 200, and so on, the third gel layer 130 with a thickness of 0.12mm and the fourth gel layer 140 with a thickness of 0.1mm are coated respectively, and the first gel layer 110, the second gel layer 120, the third gel layer 130 and the fourth gel layer 140 form a gel lamination together.
As shown in fig. 5, the manufacturing process of the diffuser 100 further includes processes of imprinting and curing, wherein the auxiliary tool in the imprinting process includes the mold 300, and the auxiliary tool in the curing process includes the light source 400. In the manufacturing process of the diffuser 100, the mold 300 is located on a side of the fourth gel layer 140 departing from the carrier 200, the mold 300 is used to imprint the micro lens 150 (not shown) on a surface of the gel stack formed by the first gel layer 110, the second gel layer 120, the third gel layer 130 and the fourth gel layer 140, which faces away from the carrier 200, and simultaneously, the light source 400 of the curing machine is turned on to irradiate the gel stack.
In the embodiment of the present invention, since the first gel layer 110, the second gel layer 120, the third gel layer 130, and the fourth gel layer 140 are made of the same material (all photosensitive adhesives), and the curing conditions are the same (the curing conditions include the curing time, the irradiation intensity of the light source 400, and the like), so that no bonding surface exists among the stacked layers after the curing treatment of the first gel layer 110, the second gel layer 120, the third gel layer 130, and the fourth gel layer 140, and the integrated diffuser 100 is finally obtained.
Also, in the present embodiment, the curing rate of the diffuser 100 is increased. As shown in fig. 6, the number of the light sources 400 may be multiple, the multiple light sources 400 are arranged in an array on a side of the substrate 200 away from the first gel layer 110, and the multiple light sources 400 simultaneously irradiate the gel stack formed by the first gel layer 110, the second gel layer 120, the third gel layer 130 and the fourth gel layer 140, so as to significantly increase the curing rate, and thus the production rate of the diffuser 100.
Without limitation, as shown in fig. 7, a plurality of light sources 400 may be uniformly disposed on the periphery of the gel stack formed by the first gel layer 110, the second gel layer 120, the third gel layer 130 and the fourth gel layer 140 to further increase the curing rate of the diffuser 100.
The present embodiments also provide a diffuser prepared by the preparation method of each of the above embodiments, which includes a substrate plate (the substrate plate is a final product after curing the gel layer in each of the above embodiments) and microlenses. The base material plate comprises a light inlet surface and a light outlet surface opposite to the light inlet surface, and the micro lens is positioned on the light outlet surface of the base material plate, wherein the diffuser is configured in such a way that light rays entering the light inlet surface pass through the micro lens and finally are emitted out of the micro lens to generate light ray dispersion.
The diffusion can be understood as the refraction, reflection and scattering of light rays in different directions, and the traveling route of light can be changed by the diffuser of the embodiment of the application, so that the incident light has the optical diffusion effect.
The embodiment of the application also provides a camera module, which comprises the diffuser.
The embodiment of the application also provides electronic equipment which comprises the camera module.
The electronic device provided by the embodiment of the application can be any electronic product, including but not limited to the following categories: a television, a notebook computer, a desktop display, a tablet computer, a digital camera, a mobile phone, smart glasses, a vehicle-mounted display, a medical device, an industrial control device, etc., which is not particularly limited in this embodiment.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present application, it is to be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present application and simplifying the description, but it is not intended to indicate or imply that the referred unit or element must have a specific orientation, be constructed in a specific orientation and be operated, and therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limitations of the present patent, and specific meanings of the above terms may be understood by those skilled in the art according to specific situations.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A method of making a diffuser, comprising:
providing a bearing plate, and coating a gel-state material on the bearing plate to form a gel layer;
providing a micro lens and arranging the micro lens on the surface of the gel layer, which is far away from the bearing plate;
curing the gel layer provided with the microlenses;
and carrying out demolding treatment on the bearing plate to enable the bearing plate to be separated from the solidified gel layer.
2. The method of manufacturing a diffuser according to claim 1,
before the gel state material is coated on the bearing plate, a release agent is coated on the surface of the bearing plate for coating the gel state material.
3. The method of manufacturing a diffuser according to claim 1 or 2,
the coating comprises multiple coatings to form multiple layers of the gel layer in a direction of the carrier plate pointing towards the gel state material; and/or the maximum thickness dimension of each gel layer is 0.15 mm.
4. The method of manufacturing a diffuser according to claim 3,
the plurality of gel layers are integrally connected after being cured.
5. The method of producing a diffuser according to any one of claims 1, 2 or 4,
the material of loading board is glass.
6. The method of producing a diffuser according to any one of claims 1, 2 or 4,
the light source for curing treatment is positioned on one side of the bearing plate, which is far away from the gel layer.
7. The method of manufacturing a diffuser according to claim 6,
the gel-state material is photosensitive glue, and the curing treatment comprises the step of irradiating and curing the photosensitive glue in the gel state by using an ultraviolet light source.
8. The method of manufacturing a diffuser according to claim 7,
the number of the light sources for curing treatment is multiple, and the light source arrays are arranged on one side of the bearing plate, which is far away from the gel layer.
9. A diffuser prepared by the method of any one of claims 1 to 8, comprising:
the substrate plate comprises a light incident surface and a light emergent surface opposite to the light incident surface;
and the diffuser is configured to diffuse the light rays incident to the light incident surface after the light rays pass through the micro lens.
10. The utility model provides a camera module which characterized in that includes:
the diffuser of claim 9.
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| CN110531449A (en) * | 2019-09-03 | 2019-12-03 | 豪威光电子科技（上海）有限公司 | The production method of single side and two-sided microlens array |
| CN110699668A (en) * | 2019-10-16 | 2020-01-17 | 湖北大学 | Composite coating body, preparation method and application thereof, and solar cell |
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