Method for manufacturing a light-emitting device, method for manufacturing an optical component, and ultraviolet irradiation device

Abstract

To improve manufacturing efficiency by facilitating the peeling of an optical member from an ultraviolet (UV)-curing sheet.SOLUTION: A method for manufacturing a light-emitting device includes steps of: preparing a UV-curing sheet 30 having an adhesive surface which is formed on the top face thereof and on which a plurality of optical members 10 are disposed, a surface of each optical member being coated with an uncured UV-curing hard coat material 12; irradiating the plurality of optical members 10 on the UV-curing sheet 30 and the UV-curing sheet 30 with UV light to cure the hard coat material 12 and to weaken the adhesive strength of the adhesive surface; peeling the plurality of optical members 10 from the UV-curing sheet 30; and combining each of the plurality of optical members 10 having been peeled with a light source 1 to obtain a plurality of light-emitting devices.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] This disclosure relates to a method for manufacturing a light-emitting device, a method for manufacturing an optical component, and an ultraviolet irradiation device. [Background technology]

[0002] Semiconductor light-emitting elements, such as nitride semiconductors, include light-emitting diodes (LEDs) and semiconductor lasers (LDs). Similarly, photodiodes (PDs) are used as light-receiving elements that utilize semiconductors. These light-emitting and light-receiving elements are often used in conjunction with optical components such as optical lenses to focus the emitted or received light. These lenses are frequently made of polycarbonate-based resins.

[0003] Furthermore, a hard coat material may be applied to the surface of the lens to protect it from scratches and other damage, or to make it difficult to see the optical elements such as LEDs inside the lens from the outside. Such hard coat materials are typically UV-curable resins. For example, in the manufacturing process of a light-emitting device that combines optical components such as optical lenses with light-emitting elements, a hard coat material is applied to the surface of each lens placed on a carrier sheet. Then, the hard coat material is cured by irradiating it with ultraviolet light using a UV irradiation machine. After that, the lenses are peeled off the carrier sheet and bonded to light-emitting elements such as LEDs mounted on a mounting substrate to manufacture the light-emitting device. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2016-058524 [Patent Document 2] Japanese Patent Publication No. 2008-221170 [Patent Document 3] Japanese Utility Model Publication No. 1-156744 [Overview of the project]

Problems to be Solved by the Invention

[0005] One object of the present disclosure is to provide a method for manufacturing a light-emitting device, a method for manufacturing an optical member, and an ultraviolet irradiation device that improve manufacturing efficiency by facilitating the peeling of an optical member from an ultraviolet-curable sheet.

Means for Solving the Problems

[0006] According to a method for manufacturing a light-emitting device according to one embodiment of the present disclosure, there is provided a method for manufacturing a light-emitting device including a light source and an optical member disposed above the light source, the method comprising: preparing a plurality of optical members coated with an uncured ultraviolet-curable hard coat material on an ultraviolet-curable sheet disposed on an adhesive surface on the upper surface; irradiating ultraviolet rays to cure the hard coat material on the plurality of optical members and the ultraviolet-curable sheet on the ultraviolet-curable sheet and to weaken the adhesive force of the adhesive surface; peeling the plurality of optical members from the ultraviolet-curable sheet; and combining each of the peeled plurality of optical members with a light source to obtain a plurality of light-emitting devices. Top and side views a plurality of optical members coated thereon bottom on an adhesive surface on the upper surface In a way that and irradiating ultraviolet rays to cure the hard coat material on the plurality of optical members and the ultraviolet-curable sheet on the ultraviolet-curable sheet and to weaken the adhesive force of the adhesive surface; peeling the plurality of optical members from the ultraviolet-curable sheet; and combining each of the peeled plurality of optical members with a light source to obtain a plurality of light-emitting devices.

[0007] Further, according to a method for manufacturing an optical member according to one embodiment of the present disclosure, there is provided a method for manufacturing an optical member having an ultraviolet-curable hard coat material formed thereon, the method comprising: preparing a plurality of optical members coated with an uncured ultraviolet-curable hard coat material on an ultraviolet-curable sheet disposed on an adhesive surface on the upper surface; irradiating ultraviolet rays to cure the hard coat material on the plurality of optical members and the ultraviolet-curable sheet on the ultraviolet-curable sheet and to weaken the adhesive force of the adhesive surface; and peeling the plurality of optical members from the ultraviolet-curable sheet. Top and side views a plurality of optical members coated thereon bottom on an adhesive surface on the upper surface In a way that and irradiating ultraviolet rays to cure the hard coat material on the plurality of optical members and the ultraviolet-curable sheet on the ultraviolet-curable sheet and to weaken the adhesive force of the adhesive surface; and peeling the plurality of optical members from the ultraviolet-curable sheet.

[0008] Furthermore, according to an ultraviolet irradiation device according to an aspect of the present disclosure, an ultraviolet irradiation device for irradiating an optical member with ultraviolet light, wherein a plurality of optical members coated with an uncured ultraviolet curable hard coat material Top and side views are placed on the upper surface bottom of an ultraviolet curable sheet In a way that is provided with a mounting table for mounting the ultraviolet curable sheet, one or more reflecting plates disposed around the mounting table, and an ultraviolet light source that irradiates ultraviolet light onto an ultraviolet irradiation region surrounded by the one or more reflecting plates from above the mounting table.

Advantages of the Invention

[0009] With the above configuration, it is possible to provide a method for manufacturing a light emitting device, a method for manufacturing an optical member, and an ultraviolet irradiation device that facilitate peeling of the optical member from the ultraviolet curable sheet and improve manufacturing efficiency.

Brief Description of the Drawings

[0010] [Figure 1] It is a plan view showing a light emitting device according to an embodiment. [Figure 2] It is a cross-sectional view taken along line II-II of the light emitting device of FIG. 1. [Figure 3] It is an exploded view of the light emitting device of FIG. 2 with the optical member removed. [Figure 4] It is a cross-sectional view showing an example of a light emitting device provided with a fixing member. [Figure 5] It is a cross-sectional view showing an optical member according to an embodiment and an enlarged cross-sectional view of a main part of the optical member. [Figure 6] It is a cross-sectional view showing an ultraviolet curable sheet in which a plurality of optical members are arranged on the upper surface of the ultraviolet curable sheet. [Figure 7] It is a perspective view showing an ultraviolet irradiation device in a state where an ultraviolet curable sheet is arranged. [Figure 8] It is a plan view showing an ultraviolet irradiation device in a state where an ultraviolet curable sheet is arranged. [Figure 9] It is a cross-sectional view showing irradiation by an ultraviolet irradiation device. [Figure 10]This is a plan view showing the direct reflector plate of an ultraviolet irradiation device. [Figure 11] This is a side view showing the direct reflector plate of an ultraviolet irradiation device. [Figure 12] This is a plan view showing the side reflector of an ultraviolet irradiation device. [Figure 13] This is a side view showing the side reflector of an ultraviolet irradiation device. [Modes for carrying out the invention]

[0011] The form of this disclosure may be specified by the following configurations.

[0012] A method for manufacturing a light-emitting device according to one embodiment of the present disclosure is a method for manufacturing a light-emitting device comprising a light source and an optical member disposed above the light source, comprising the steps of: preparing an ultraviolet-curable sheet on which a plurality of optical members, each coated with an uncured ultraviolet-curable hard coat material, are placed on an adhesive surface on the upper surface; irradiating the plurality of optical members on the ultraviolet-curable sheet and the ultraviolet-curable sheet with ultraviolet light to cure the hard coat material and weaken the adhesive force of the adhesive surface; peeling the plurality of optical members from the ultraviolet-curable sheet; and combining each of the peeled plurality of optical members with the light source to obtain a plurality of light-emitting devices. According to this method for manufacturing a light-emitting device, since the hard coat material is cured by irradiation with ultraviolet light and the adhesive force of the ultraviolet-curable sheet is weakened to make it easier to peel off, it is possible to smoothly peel off the optical members and improve manufacturing efficiency.

[0013] Furthermore, a method for manufacturing a light-emitting device according to one embodiment of the present disclosure, in the step of irradiating with ultraviolet light, the plurality of optical component One or more reflectors are placed around the optical components, and ultraviolet light is irradiated from above the multiple optical components. This allows the ultraviolet light to be reflected by the reflectors surrounding the optical components when the multiple optical components are irradiated with ultraviolet light, thereby widening the area of ​​ultraviolet light irradiation on the optical components and accelerating the curing of the ultraviolet-curable hard coat material.

[0014] Furthermore, in the manufacturing method of the light-emitting device according to one embodiment of the present disclosure, a part of the reflector is positioned below the ultraviolet-curable sheet during the ultraviolet irradiation step. This makes it possible to effectively weaken the adhesive strength of the ultraviolet-curable sheet by irradiating it with ultraviolet light from the underside, thereby enabling smoother peeling of the optical component.

[0015] Furthermore, in the manufacturing method of a light-emitting device according to one embodiment of the present disclosure, the side surface of the optical member is recessed inward compared to the top and bottom surfaces during the preparation step.

[0016] Furthermore, in a method for manufacturing a light-emitting device according to one embodiment of the present disclosure, the optical element in the preparation step is a Fresnel lens, a convex lens, or a concave lens.

[0017] Furthermore, in a method for manufacturing a light-emitting device according to one embodiment of the present disclosure, the optical component is a mixture of a polycarbonate copolymer and polycarbonate in the preparation step. By composing the optical component with these materials, it is possible to make an optical component with high transparency, impact resistance, and heat resistance.

[0018] Furthermore, in the manufacturing method of a light-emitting device according to one embodiment of the present disclosure, the emission peak wavelength of the ultraviolet light in the step of irradiating with ultraviolet light is 220 nm or more and 400 nm or less.

[0019] Furthermore, a method for manufacturing an optical member according to one embodiment of the present disclosure is a method for manufacturing an optical member on which an ultraviolet-curable hard coat material is formed, and includes the steps of: preparing an ultraviolet-curable sheet on which a plurality of optical members, each coated with an uncured ultraviolet-curable hard coat material, are placed on an adhesive surface on the upper surface; irradiating the plurality of optical members on the ultraviolet-curable sheet and the ultraviolet-curable sheet with ultraviolet light to cure the hard coat material and weaken the adhesive force of the adhesive surface; and peeling the plurality of optical members from the ultraviolet-curable sheet. According to this method for manufacturing an optical member, it is possible to cure the hard coat material by irradiating with ultraviolet light, weaken the adhesive force of the ultraviolet-curable sheet to make it easier to peel off, and smoothly peel off the optical members, thereby improving manufacturing efficiency.

[0020] Furthermore, an ultraviolet irradiation device according to one embodiment of the present disclosure is an ultraviolet irradiation device for irradiating an optical member with ultraviolet light, comprising: a mounting base for mounting an ultraviolet curing sheet on which a plurality of optical members coated with an uncured ultraviolet curing hard coat material are arranged on the upper surface; one or more reflectors arranged around the mounting base; and an ultraviolet light source that irradiates ultraviolet light from above the mounting base into an ultraviolet irradiation area surrounded by the one or more reflectors. With this ultraviolet irradiation device, when irradiating a plurality of optical members with ultraviolet light, the ultraviolet light is reflected by the reflectors arranged to surround them, thereby widening the ultraviolet irradiation area on the optical members and promoting the curing of the ultraviolet curing hard coat material. In addition, by irradiating with ultraviolet light to cure the hard coat material, the adhesive strength of the ultraviolet curing sheet is weakened, making it easier to peel off, and the optical members can be peeled off smoothly, thereby improving manufacturing efficiency.

[0021] Furthermore, an ultraviolet irradiation device according to one embodiment of the present disclosure comprises four reflectors, one or more of which are arranged to surround each of the four sides of the mounting base described above. By reflecting ultraviolet light with the reflectors arranged on all four sides, ultraviolet light can be effectively irradiated onto the sides of multiple optical members on an ultraviolet-curable sheet placed on the mounting base. This makes it possible to accelerate the curing of the hard coat material placed on the sides of the optical members.

[0022] Furthermore, in one embodiment of the ultraviolet irradiation device according to this disclosure, the one or more reflectors are configured by connecting a plurality of small reflectors. By configuring the reflector with a plurality of small reflectors and reflecting ultraviolet light with each small reflector tilted at a specific angle, it becomes easier to irradiate an optical component with ultraviolet light in a desired irradiation distribution.

[0023] Furthermore, an ultraviolet irradiation device according to one embodiment of this disclosure has an angle adjustment region in which the plurality of small reflectors are arranged such that the angle between the inner surface of each small reflector and the horizontal direction becomes smaller in the direction from top to bottom. By composing the reflector with a plurality of small reflectors and reflecting ultraviolet light with each small reflector tilted at a specific angle, it becomes easier to irradiate the optical component with ultraviolet light in a desired irradiation distribution. In addition, the inner surface of each of the plurality of small reflectors tends to gradually face inward or upward in the direction from top to bottom, making it easier to effectively reflect and irradiate the sides and bottom of the optical component with ultraviolet light.

[0024] Furthermore, in one embodiment of the ultraviolet irradiation device according to the present disclosure, the inner surface of one of the small reflectors and the inner surface of another small reflector adjacent to the first small reflector are inclined at an angle of 3° to 15° within the angle adjustment region.

[0025] The embodiments of this disclosure will be described below with reference to the drawings. In the following description, terms indicating specific directions or positions (e.g., "up," "down," and other terms including these) will be used as needed. The use of these terms is for the purpose of facilitating the understanding of the invention with reference to the drawings, and the meaning of these terms does not limit the technical scope of this disclosure. Also, parts with the same reference numerals appearing in multiple drawings indicate the same or equivalent parts or components.

[0026] Furthermore, the embodiments described below illustrate specific examples of the technical concept of this disclosure and do not limit this disclosure to the following. Also, the dimensions, materials, shapes, relative arrangements, etc. of the components described below are intended to be illustrative, and not to limit the scope of this disclosure unless otherwise specified. In addition, the content described in one embodiment or example is applicable to other embodiments or examples. Furthermore, the size and positional relationships of the members shown in the drawings may be exaggerated for clarity of explanation. In addition, end view diagrams showing only the cut surface may be used as cross-sectional views. In addition, the same terminology and reference numerals may be used for both the material before curing and the material after curing. [Light-emitting device]

[0027] The light-emitting device will be described with reference to the drawings. Figure 1 is a plan view showing a light-emitting device according to an embodiment of this disclosure. Figure 2 is a cross-sectional view of the light-emitting device of Figure 1 taken along line II-II. Figure 3 is an exploded view of the light-emitting device of Figure 2 with the optical components removed.

[0028] The light-emitting device 100 comprises a mounting substrate 5, a light source 1 placed on the mounting substrate 5, and an optical element 10 placed above the light source 1. The optical element 10 has a hard coat material 12 on its surface. (Platform)

[0029] The mounting substrate 5 on which the light source 1 is placed comprises a base body and wiring arranged on either the surface and / or interior of the base body. The mounting substrate 5 and the light source 1 are electrically connected by connecting the wiring of the mounting substrate 5 and the positive and negative pair of electrodes of the light source 1 via a conductive adhesive portion.

[0030] The substrate of the mounting board 5 is preferably made of an insulating material, preferably a material that does not easily transmit light emitted from the light source 1 or ambient light, and preferably a material that has a certain degree of strength. The substrate material can be made of ceramics such as alumina, aluminum nitride, silicon nitride and mullite, or resins such as phenolic resin, epoxy resin, polyimide resin, BT resin (bismaleimide triazine resin) and polyphthalamide. (light source)

[0031] The light source 1 comprises at least a light-emitting element 2. The light source 1 shown in Figure 3 comprises a light-emitting element 2, a wavelength conversion member 3 located above the light-emitting element 2, and a covering member 4 that covers the sides of the light-emitting element 2 and the sides of the wavelength conversion member 3.

[0032] The light-emitting element 2 is, for example, an LED (Light Emitting Diode). The light-emitting element 2 includes at least a semiconductor laminate and a pair of positive and negative electrodes placed on the lower surface of the semiconductor laminate. The light-emitting element 2 may also have a translucent substrate or the like further placed on top of the semiconductor laminate. The semiconductor laminate includes an n-type semiconductor layer, an active layer, and a p-type semiconductor layer. The light-emitting element 2 is, for example, a rectangle with sides of 50 μm or more and 2000 μm or less when viewed from above. However, the shape of the semiconductor laminate is not limited to the above.

[0033] It is preferable to use a nitride semiconductor capable of emitting short-wavelength light that can efficiently excite the wavelength conversion material contained in the wavelength conversion member 3 as the material for the semiconductor laminate. Nitride semiconductors are mainly those with the general formula In x Al y Ga 1-x-yThe coefficient of emission is expressed as N(0≦x, 0≦y, x+y≦1). The emission peak wavelength of the semiconductor laminate is preferably 400nm to 530nm, more preferably 420nm to 490nm, and even more preferably 450nm to 475nm, from the viewpoint of luminescence efficiency and the color mixing relationship between excitation of the wavelength conversion material and its emission. However, the semiconductor laminate material may be an InAlGaAs-based semiconductor or an InAlGaP-based semiconductor, etc. The color of the light emitted from the semiconductor laminate is blue in this embodiment.

[0034] One of the pair of electrodes of the light-emitting element 2 is electrically connected to the n-type semiconductor layer of the semiconductor stack, and the other is electrically connected to the p-type semiconductor layer of the semiconductor stack. Furthermore, if the light source 1 comprises multiple light-emitting elements 2, the pair of electrodes of each light-emitting element 2 are electrically connected in pairs to the wiring on the mounting substrate 5. Therefore, the outputs of the multiple light-emitting elements 2 can be controlled individually.

[0035] The wavelength conversion member 3 is placed on the light-emitting element 2. In this embodiment, the wavelength conversion member 3 includes a translucent resin material as a base material and a wavelength conversion material. The wavelength conversion member 3 may also be a sintered body of the wavelength conversion material.

[0036] For the base material of the wavelength conversion member 3, a translucent resin material such as silicone can be used. The wavelength conversion material absorbs at least a portion of the primary light emitted by the light-emitting element 2 and emits secondary light with a different wavelength from the primary light.

[0037] Examples of wavelength-converting materials include yttrium aluminum garnet phosphors (e.g., Y3(Al,Ga)5O 12 Ce), lutetium-aluminum-garnet phosphors (e.g., Lu3(Al,Ga)5O 12 Ce), terbium aluminum garnet phosphors (e.g., Tb3(Al,Ga)5O 12 :Ce), CCA-based phosphors (e.g., Ca 10 (PO4)6Cl2:Eu), SAE-based phosphors (e.g., Sr4Al 14 O25 : Eu), chlorosilicate phosphors (e.g., Ca8MgSi4O 16 Cl2: Eu), nitride phosphors, fluoride phosphors, phosphors having a perovskite structure (e.g., CsPb(F,Cl,Br,I)3), quantum dot phosphors (e.g., CdSe, InP, AgInS2 or AgInSe2), etc. can be used. Examples of nitride phosphors are β-sialon phosphors (e.g., (Si,Al)3(O,N)4: Eu), α-sialon phosphors (e.g., Ca(Si,Al) 12 (O,N) 16 : Eu), SLA phosphors (e.g., SrLiAl3N4: Eu), CASN phosphors (e.g., CaAlSiN3: Eu) and SCASN phosphors (e.g., (Sr,Ca)AlSiN3: Eu), etc. Examples of fluoride phosphors are KSF phosphors (e.g., K2SiF6: Mn), KSAF phosphors (e.g., K2(Si,Al)F6: Mn) and MGF phosphors (e.g., 3.5MgO·0.5MgF2·GeO2: Mn), etc. The above phosphors are particles. Also, one of these wavelength conversion members can be used alone, or two or more of these wavelength conversion members can be used in combination.

[0038] The KSAF phosphor may have a composition represented by the following formula (I).

[0039] M2[Si p Al q Mn r F s (I)

[0040] In formula (I), M represents an alkali metal and may contain at least K. Mn may be a tetravalent Mn ion. p, q, r, and s may satisfy 0.9 ≦ p + q + r ≦ 1.1, 0 < q ≦ 0.1, 0 < r ≦ 0.2, 5.9 ≦ s ≦ 6.1. Preferably, 0.95 ≦ p + q + r ≦ 1.05 or 0.97 ≦ p + q + r ≦ 1.03, 0 < q ≦ 0.03, 0.002 ≦ q ≦ 0.02 or 0.003 ≦ q ≦ 0.015, 0.005 ≦ r ≦ 0.15, 0.01 ≦ r ≦ 0.12 or 0.015 ≦ r ≦ 0.1, 5.92 ≦ s ≦ 6.05 or 5.95 ≦ s ≦ 6.025. For example, compositions represented by K2[Si 0.946 Al 0.005 Mn 0.049 F 5.995 , K2[Si 0.942 Al 0.008 Mn 0.050 F 5.992 , K2[Si 0.939 Al 0.014 Mn 0.047 F 5.986 4] are exemplified. According to such a KSAF-based phosphor, high luminance and red light emission with a narrow half-value width of the emission peak wavelength can be obtained.

[0041] The color emitted by the wavelength conversion member 3 is, for example, yellow. By mixing the blue light emitted by the light-emitting element 2 and the yellow light emitted by the wavelength conversion member 3, the light source 1 emits white light. However, the color of the light emitted by the light source 1 is not limited to white.

[0042] The wavelength conversion member 3 may further include a light diffusing member. As the light diffusing member, for example, titanium oxide, barium titanate, aluminum oxide, silicon oxide, etc. can be used. 4]

[0043] The coating member ④ is a member that coats the side surfaces of the light-emitting element 2 and the wavelength conversion member 3, and directly or indirectly coats the side surfaces of the light-emitting element 2 and the wavelength conversion member 3. The upper surface of the wavelength conversion member 3 is exposed from the coating member 4 and constitutes the light-emitting surface of the light source 1.

[0044] The covering member 4 is preferably made of a material with high light reflectivity in order to improve light extraction efficiency. For example, the covering member 4 can be made of a resin material containing a light-reflective substance such as a white pigment.

[0045] Examples of light-reflecting materials include titanium dioxide, zinc oxide, magnesium oxide, magnesium carbonate, magnesium hydroxide, calcium carbonate, calcium hydroxide, calcium silicate, magnesium silicate, barium titanate, barium sulfate, aluminum hydroxide, aluminum oxide, zirconium oxide, silicon oxide, etc. It is preferable to use one of these alone or two or more of these in combination.

[0046] Furthermore, it is preferable to use a resin material mainly composed of thermosetting resins such as epoxy resin, epoxy-modified resin, silicone resin, silicone-modified resin, and phenolic resin as the base material. The covering member 4 may also be made of a material that is translucent to visible light as needed. (Optical components)

[0047] The optical component 10 adjusts the direction of emission of light incident from the light source 1 and emits it to the outside. Such an optical component 10 can suitably utilize optical lenses, and Fresnel lenses, concave lenses, convex lenses, or meniscus lenses can suitably utilize them. In particular, two-dimensional lenses such as Fresnel lenses are preferred because they can be easily made thinner and are easy to install in a space-saving manner. Such an optical component 10 preferably has light transmittance to the light emitted from the light source 1. Light transmittance here refers to the property of being able to transmit 60% or more of the light from the light-emitting part 10. The optical component 10 is composed of, for example, at least one of a resin material such as polycarbonate resin, acrylic resin, silicone resin, epoxy resin, or glass material. Preferably, the optical component 10 contains a mixture of polycarbonate and a polycarbonate copolymer. By composing the optical component 10 with these materials, it is possible to make an optical component with high transparency, impact resistance, and heat resistance. The size of the radius of curvature of the optical component 10 and the thickness of the lens can be changed as appropriate. Furthermore, the planar shape of the optical element 10 is not limited to a roughly circular shape, but may be roughly rectangular, roughly triangular, roughly elliptical, or roughly polygonal, etc. Considering that the imaging range of a typical imaging device is roughly rectangular, it is preferable that the planar shape of the optical element 10 is 4-fold rotationally symmetric or 2-fold rotationally symmetric.

[0048] The optical member 10 preferably has a recess on its bottom surface for positioning the light source 1. The optical member 10 comprises an upper surface 10a, a bottom surface 10b, and a side surface 10c connecting the upper surface 10a and the bottom surface 10b. When the optical member 10 is viewed from the side, the side surface 10c of the optical member 10 is recessed inward compared to the upper surface 10a and the bottom surface 10b. By forming such a recess, it becomes possible to position the fixing member 6 on the side surface of the optical member 10. (Fixing member 6)

[0049] Figure 4 shows an example of a light-emitting device 100' equipped with a fixing member 6. The fixing member 6 is provided so as to protrude from a part of the side surface 10c of the optical element 10. Alternatively, a part of the fixing member 6 is inserted into the interior of the side surface 10c. This fixing member 6 is a flexible member that deforms when pressed during engagement with other members. Other members include, for example, the housing used in mobile phones and smartphones. Deformation due to pressure means that, for example, when the optical element 10 of the light-emitting device 100' is fitted into a through-hole in the housing, the shape of the fixing member 6 changes so that the light-emitting device 100' is fixed to the housing. By fixing the light-emitting device 100' to the housing with the fixing member 6, the light-emitting device and illumination device can be made thinner. The fixing member 6 may be covered with a thin film made of the material that constitutes the side surface 10c of the optical element 10. (Hard coat material)

[0050] Furthermore, as shown in the cross-sectional view of Figure 3, the optical member 10 is provided with a hard coat material 12 on its surface. The hard coat material 12 is harder than the optical member 10. The hard coat material 12 is transparent and preferably continuously covers the upper surface 10a and side surface 10c of the optical member 10. By providing a hard coat material on the surface of the optical member 10, deformation of the optical member 10 can be suppressed. In addition, by providing a hard coat material on the surface of the optical member 10, the upper surface of the optical member 10 can be protected from external forces, dust, moisture, etc., and scratches can be prevented. Such a hard coat material 12 is made of an ultraviolet-curing resin. Examples of base materials for the hard coat material 12 include thermosetting resins, thermoplastic resins, modified resins thereof, or hybrid resins containing one or more of these resins. Specifically, examples include acrylic resins, epoxy resins, modified epoxy resins, silicone resins, modified silicone resins, hybrid silicone resins, and polycarbonate resins.

[0051] The hard coat material 12 may consist of a single layer or multiple layers. If the hard coat material 12 consists of multiple layers, the layers may be made of the same material or layers may be made of different materials. In Figure 5, six layers of subcoat material 11, with acrylic resin as the base material, are arranged on the surface of the optical member 10. If the hard coat material 12 consists of multiple layers, some of the layers of the uncured subcoat material (e.g., one or two layers) are applied to the surface of the optical member 10, and then cured by irradiation with ultraviolet light. After that, the remaining layers (e.g., four or five layers) are applied and cured by irradiation with ultraviolet light. This can suppress the occurrence of cracks on the surface of the hard coat material 12. Alternatively, all of the multiple layers of the uncured subcoat material (e.g., six layers) may be applied to the surface of the optical member and then cured by irradiation with ultraviolet light. In this specification, when the hard coat material 12 consists of multiple layers, a single layer (subcoat material) constituting the multiple layers may be described as the hard coat material, or all of the multiple layers may be described as the hard coat material. [Manufacturing method for light-emitting devices]

[0052] A method for manufacturing a light-emitting device according to the embodiment of this disclosure will be explained with reference to Figures 6 to 9. Figure 6 is a cross-sectional view showing an ultraviolet-curable sheet with a plurality of optical members arranged on its upper surface. Figure 7 is a perspective view showing an ultraviolet irradiation device with the ultraviolet-curable sheet arranged on it. Figure 8 is a plan view showing the ultraviolet irradiation device with the ultraviolet-curable sheet arranged on it. Figure 9 is a cross-sectional view showing irradiation by the ultraviolet irradiation device.

[0053] A method for manufacturing a light-emitting device according to the embodiment of this disclosure includes the steps of: preparing an ultraviolet-curable sheet 30 on which a plurality of optical members 10, each coated with an uncured ultraviolet-curable hard coat material 12, are placed on an adhesive surface 32 on the upper surface; irradiating the plurality of optical members 10 on the ultraviolet-curable sheet 30 and the ultraviolet-curable sheet 30 with ultraviolet light to cure the hard coat material 12 and weaken the adhesive force of the adhesive surface 32; peeling the plurality of optical members 10 from the ultraviolet-curable sheet 30; and combining each of the peeled optical members 10 with a light source 1 to obtain a plurality of light-emitting devices 100.

[0054] The following provides a detailed explanation of each step. (A process for preparing an ultraviolet-curable sheet equipped with multiple optical components.)

[0055] As shown in Figure 6, an ultraviolet-curable sheet 30 is prepared, which has multiple optical members 10 on its upper surface. The upper surface of the ultraviolet-curable sheet 30 is an adhesive surface 32, and the multiple optical members 10 are placed on the adhesive surface 32. An uncured ultraviolet-curable hard coat material 12 is applied to the surface of the optical members 10.

[0056] An example of the process for preparing an ultraviolet-curable sheet 30 having multiple optical members 10 on its upper surface will be described. First, the ultraviolet-curable sheet 30 and the multiple optical members 10 are prepared. The ultraviolet-curable sheet 30 and the multiple optical members 10 may be prepared by manufacturing or by purchasing. For example, the multiple optical members 10 can be prepared by manufacturing by injecting a base resin into a molding die and solidifying or curing the base resin in a heating process to form multiple optical members in an aggregate state. After that, the multiple optical members 10 can be prepared by manufacturing by separating them into individual pieces with a dicing blade or the like.

[0057] Next, each optical member 10 is placed on the adhesive surface 32 on the upper surface of the UV-curable sheet 30, with the bottom surface of the optical member 10 facing the adhesive surface 32. Alternatively, with multiple optical members 10 placed on the upper surface of the UV-curable sheet 30, a pre-UV irradiation process and a cleaning process may be performed on each optical member 10.

[0058] The pre-ultraviolet irradiation process involves irradiating each optical component 10 before applying the hard coat material 12 with, for example, a peak wavelength of 365 nm and a peak intensity of 60 mW / cm². 2 , and an integrated light intensity of 400 mJ / cm² 2 The device is irradiated with ultraviolet light for approximately 10 seconds using a mercury valve. This facilitates the subsequent peeling process in which each optical component 10 is removed from the ultraviolet-curable sheet 30.

[0059] The cleaning process involves, for example, pressing each optical component 10 against a sponge soaked in a cleaning solution of 70% Solmix and 30% pure water, and cleaning the optical component 10 five times (for about 10 seconds). This improves the resistance of the surface of each optical component 10 to chemical changes.

[0060] Next, with the multiple optical components 10 arranged on the UV-curable sheet 30, an uncured hard coat material 12 is applied to the surface of each optical component 10. The hard coat material 12 can be applied by a spray method or the like. (Process of irradiating with ultraviolet light)

[0061] Next, as shown in Figures 7 to 9, an ultraviolet-curable sheet 30 equipped with multiple optical members 10 is placed on the mounting table 50 of the ultraviolet irradiation device 1000. Then, ultraviolet light is irradiated onto each optical member 10 and the ultraviolet-curable sheet 30 using the ultraviolet light source 70 of the ultraviolet irradiation device 1000. By irradiating each optical member 10 and the ultraviolet-curable sheet 30 with ultraviolet light, the hard coat material 12 located on the surface of each optical member 10 is cured, and the adhesive strength of the adhesive surface 32 of the ultraviolet-curable sheet 30 is reduced. This allows the curing of the hard coat material 12 and the reduction of the adhesive strength of the adhesive surface 32 of the ultraviolet-curable sheet 30 to be performed in the same process, simplifying the process. By reducing the adhesive strength of the adhesive surface 32 of the ultraviolet-curable sheet 30, the peeling process in the next step of peeling the optical members 10 from the ultraviolet-curable sheet 30 becomes easier.

[0062] The ultraviolet irradiation process involves, for example, irradiating with ultraviolet light having an emission peak wavelength of 220 nm to 400 nm. Furthermore, the ultraviolet irradiation is performed with, for example, an emission peak intensity of 55 mW / cm². 2 More than 85mW / cm 2 Below, the cumulative light intensity is 380 mJ / cm². 2 More than 420mJ / cm 2 It is preferable to irradiate within the following range.

[0063] As an example of the process of applying the hard coat material 12 and irradiating with ultraviolet light, the following method can be given. With a plurality of optical members 10 arranged on an ultraviolet-curable sheet 30, the first layer of uncured subcoat material 11 is applied to the surface of each optical member 10. The film thickness of the subcoat material 11 is set according to the total thickness of the hard coat material 12. The film thickness of the subcoat material 11 is, for example, 8 μm or more and 14 μm or less. Note that two or more layers of subcoat material 11 may be applied depending on the purpose. The material of the subcoat material 11 is, for example, a photocurable resin. This process may be described as the first forming process, distinguished from the subsequent process of forming the subcoat material.

[0064] Next, in the ultraviolet irradiation step, one or more layers of subcoat material 11 are irradiated with ultraviolet light to cure them. In this case, for example, ultraviolet light with an emission peak wavelength of 220 nm to 400 nm is irradiated, and the emission peak intensity is 100 mW / cm². 2 More than 200mW / cm 2 Below, the cumulative light intensity is 600 mJ / cm². 2 Below 800mJ / cm 2 The irradiation will be performed within the following range. Note that when the subcoat material 11 is irradiated with ultraviolet light, the ultraviolet curing sheet 30 is also irradiated with ultraviolet light.

[0065] Next, using the same method, an uncured subcoat material 11 is applied onto the cured subcoat material 11 so that the hardcoat material 12 reaches a predetermined film thickness. At this time, the uncured subcoat material 11 may be applied in one layer or two or more layers. The film thickness of the subcoat material 11 is, for example, 8 μm or more and 14 μm or less. The material of the subcoat material 11 may be the same as or different from the material used in the first forming step. This step may be described as the second forming step, distinct from the first forming step. When the subcoat material 11 is irradiated with ultraviolet light, the ultraviolet curing sheet 30 is also irradiated with ultraviolet light.

[0066] The number of layers of subcoat material 11 applied in the first forming step is preferably less than the number of layers of subcoat material 11 applied in the second forming step. In other words, when the hard coat material 12 is composed of multiple subcoat materials 11, it is preferable to apply the subcoat material 11 with more layers during the second forming step. This effectively suppresses cracks on the surface of the hard coat material 12.

[0067] Next, a heating process is performed. In the heating process, with the multiple optical components 10 placed on the ultraviolet-curable sheet 30, the hard coat material 12 on the surface of the optical components 10 is heated, for example, at a temperature of 60°C to 70°C for 6 to 12 minutes.

[0068] Subsequently, in the ultraviolet irradiation step, the subcoat material 11 formed in the first and second forming steps is irradiated with ultraviolet light to cure it. In this case, for example, ultraviolet light with an emission peak wavelength of 220 nm to 400 nm is irradiated, and the emission peak intensity is 100 mW / cm². 2 More than 200mW / cm 2 Below, the cumulative light intensity is 600 mJ / cm². 2 More than 800mJ / cm 2 Irradiate within the following range. In this way, a hard coat material 12 is formed on the surface of each optical component 10.

[0069] The method for forming the hard coat material 12 on the surface of each optical component 10 is not limited to the above. For example, multiple sub-coat materials 11 may be applied so that the hard coat material 12 reaches a predetermined thickness, and then cured by irradiating with ultraviolet light all at once. The step of applying the sub-coat material 11 may also include a third forming step or the like. (Peeling process)

[0070] Next, the multiple optical components 10 are peeled off the UV-curable sheet 30. The peeling off of the multiple optical components 10 is performed, for example, by using a pin that picks up each optical component from below the UV-curable sheet 30 to push it upward, and at the same time, a nozzle adsorbs onto the upper surface of each optical component to perform the peeling. (Process for obtaining multiple light-emitting devices)

[0071] Next, each of the multiple optical members 10 peeled off from the ultraviolet-curable sheet 30 is combined with the light source 1 to obtain multiple light-emitting devices 100. In this way, a light-emitting device 100 comprising a light source 1 and optical members 10 positioned above the light source 1 can be manufactured.

[0072] According to the manufacturing method of the light-emitting device according to the embodiments of this disclosure described above, a hard coat material is formed on the surface of each optical component, thereby suppressing deformation of the optical components. Furthermore, by providing a hard coat material on the surface of the optical components, the upper surface of the optical components can be protected from external forces, dust, moisture, etc., and scratches and other damage can be prevented. In addition, since the hard coat material can be applied and cured to multiple optical components at once, manufacturing can be carried out more efficiently compared to when the hard coat material is applied to each optical component individually.

[0073] Furthermore, by irradiating each optical component and the UV-curable sheet with ultraviolet light, the hard coat material located on the surface of each optical component is hardened, and the adhesive strength of the adhesive surface 32 of the UV-curable sheet is reduced. This allows the hardening of the hard coat material and the reduction of the adhesive strength of the adhesive surface 32 of the UV-curable sheet to be performed in the same process, simplifying the process. Reducing the adhesive strength of the adhesive surface 32 of the UV-curable sheet makes it easier to peel the optical components from the UV-curable sheet. [Ultraviolet irradiation device]

[0074] Here, an ultraviolet irradiation device 1000 for irradiating the optical component 10 used in the manufacturing process of the light-emitting device 100 described above will be explained using Figures 7 to 13. Figure 10 is a plan view showing the front reflector of the ultraviolet irradiation device. Figure 11 is a side view showing the front reflector of the ultraviolet irradiation device. Figure 12 is a plan view showing the side reflector of the ultraviolet irradiation device. Figure 13 is a side view showing the side reflector of the ultraviolet irradiation device.

[0075] The ultraviolet irradiation device 1000 comprises a mounting base 50, one or more reflectors 60, and an ultraviolet light source 70. (Platform)

[0076] The mounting table 50 is a component for mounting an object to be irradiated with ultraviolet light. In the embodiment of this disclosure, an ultraviolet-curable sheet 30 on which a plurality of optical members 10 are arranged on the upper surface is placed on the mounting table 50. An uncured ultraviolet-curable hard coat material 12 is applied to the surface of each optical member 10. The mounting table 50 has a transport section 52, such as a conveyor, for transporting the ultraviolet-curable sheet 30. As shown in the plan view of Figure 8, the transport section 52 sequentially transports the plurality of ultraviolet-curable sheets 30, moving them sequentially so that each ultraviolet-curable sheet 30 is introduced into the ultraviolet irradiation area 54 where ultraviolet light is irradiated. In other words, the ultraviolet irradiation area 54 is provided on the path of the transport section 52. An ultraviolet light source 70 is positioned above the ultraviolet irradiation area 54. The ultraviolet irradiation area 54 is surrounded by one or more reflectors 60. (reflector)

[0077] The reflector 60 is a component for reflecting light emitted from the ultraviolet light source 70. The reflector 60 is positioned around the ultraviolet irradiation area 54 of the mounting base 50. In order to efficiently irradiate the ultraviolet-curable sheet 30 and the multiple optical members 10, which have been transported to the ultraviolet irradiation area 54 by the transport unit 52, with ultraviolet light, the light emitted from the ultraviolet light source 70 is reflected by the reflector 60. By positioning one or more reflectors 60 around the ultraviolet irradiation area 54 and irradiating with ultraviolet light, the irradiation area of ​​ultraviolet light for each optical member 10 is widened, making it possible to accelerate the curing of the uncured hard coat material 12 on the surface. In other words, in addition to directly irradiating the optical members 10 with ultraviolet light from above, some of the ultraviolet light can be reflected by the reflector 60 and irradiated to areas that are difficult to directly irradiate with ultraviolet light. Areas that are difficult to directly irradiate with ultraviolet light include, for example, the sides of the optical members 10 and the recesses on the sides of the optical members 10. More specifically, ultraviolet light emitted from the ultraviolet light source 70 is irradiated onto the reflector 60, and the ultraviolet light reflected by the reflector 60 is returned upward or to the side and irradiated onto the ultraviolet-curable sheet 30. As a result, the light from the ultraviolet light source 70 wraps around, allowing ultraviolet light to be irradiated onto the hard coat material 12 placed on the side of the optical member 10. In addition, for the ultraviolet-curable sheet 30, in addition to directly irradiating it with ultraviolet light from above, the irradiation area of ​​the ultraviolet-curable sheet 30 can be widened by reflecting some of the ultraviolet light with the reflector 60. Furthermore, in one embodiment of the present disclosure, a part of the reflector 60 is located below the ultraviolet-curable sheet 30. As a result, in addition to direct irradiation of ultraviolet light from above, the ultraviolet-curable sheet 30 can also be irradiated from below with ultraviolet light reflected by the reflector 60, effectively weakening the adhesive strength of the ultraviolet-curable sheet 30 and making it easier to peel off each optical member 10.

[0078] Each reflector 60 is made of a material with high reflectivity to ultraviolet light so that it can efficiently reflect the light emitted by the ultraviolet light source 70. Furthermore, it is desirable that the reflectors be made of a material that is resistant to degradation by ultraviolet light. Suitable materials for this purpose include metal plates with aluminum or stainless steel as the base material. In addition, a coating to increase reflectivity may be applied to the surface of the reflector 60. For example, a metal film such as aluminum may be formed on the surface of the reflector 60 by vapor deposition. Alternatively, the surface of the reflector 60 may be subjected to surface treatment such as mirror polishing.

[0079] It is preferable that a portion of the reflector 60 be positioned below the UV-curable sheet 30. This makes it possible to irradiate the UV-curable sheet 30 with ultraviolet light from below, in addition to irradiating it from above. More specifically, a portion of the ultraviolet light emitted from the UV light source 70 irradiates a portion of the reflector 60 located below the UV-curable sheet 30, and the ultraviolet light reflected from that portion is returned to the upper side and irradiates the lower surface of the UV-curable sheet 30. By irradiating the UV-curable sheet 30 with ultraviolet light from below, in addition to directly irradiating it with ultraviolet light from above, the adhesive strength of the UV-curable sheet 30 is effectively weakened, making it easier to peel off the optical member 10. Note that the ultraviolet light irradiated onto the UV-curable sheet 30 includes ultraviolet light directly irradiated from the UV light source 70 and ultraviolet light reflected once or multiple times by the reflector 60. In other words, irradiation of the UV-curable sheet 30 is not limited to cases where ultraviolet light is directly irradiated onto the UV-curable sheet 30, but also includes cases where ultraviolet light is indirectly irradiated onto the UV-curable sheet 30 via the optical member 10.

[0080] As shown in Figure 8, it is preferable that one or more reflectors 60 be arranged so that four reflectors 60 surround each of the four sides of the mounting base 50. This allows ultraviolet light to be effectively irradiated from all sides onto the ultraviolet-curable sheet 30 and the multiple optical members 10. Furthermore, it is preferable to arrange three or more reflectors 60 so that, in a top view, the ultraviolet irradiation area 54 surrounded by one or more reflectors 60 forms a substantially regular polygon shape centered on the ultraviolet light source 70. This makes it easier to achieve a uniform distribution of ultraviolet light intensity. The one or more reflectors 60 shown in Figure 8 consist of a pair of side reflectors 62 arranged on the left and right sides along the transport direction of the transport unit 52, and a pair of frontal reflectors 61 arranged to intersect the transport direction.

[0081] The side reflectors 62 and the front reflectors 61 may have the same shape or different shapes. In the pair of reflectors 60 shown in Figure 7, the pair of front reflectors 61 are positioned above the top surface of the transport unit 52 so as not to obstruct the transport of the UV-curing sheet 30 by the transport unit 52. On the other hand, the pair of side reflectors 62 are positioned so that their tips are below the top surface of the transport unit 52, and a part of the reflectors wraps around to the underside of the UV-curing sheet 30. With this arrangement, the UV rays reflected by the side reflectors 62 are also irradiated from the back side of the UV-curing sheet 30, effectively reducing the adhesive strength of the UV-curing sheet 30. Furthermore, the fixing positions of the front reflectors 61 and the side reflectors 62 may be different. In the one or more reflectors 60 shown in Figure 7, the fixing position of the front reflector 61 is lower than the fixing position of the side reflectors 62.

[0082] It is preferable that the tip of each reflector 60 bends or curves with respect to the vertical direction. In particular, the side reflector 62 has a larger angle of inclination with respect to the vertical than the front reflector 61. This allows the tip of the side reflector 62 to be positioned below the UV-curable sheet 30, as shown in Figure 9, making it easier to irradiate the back surface of the UV-curable sheet 30 with reflected UV light. Thus, the front reflector 61 has a gentle inclination or curve with respect to the vertical direction, while the side reflector 62 has a steep inclination or curve with respect to the vertical direction so that it is positioned below the UV-curable sheet 30.

[0083] Each reflector 60 may be composed of a series of smaller reflectors 64. As shown in Figures 10 to 13, the front reflector 61 and the side reflector 62 are each bent into a shape in which a series of smaller reflectors 64 are connected. The series of smaller reflectors 64 may have angle adjustment regions 65 arranged so that the angle between the inner surface of one reflector 64 and the horizontal direction is small in the direction from top to bottom. In the angle adjustment region 65, the angle between the inner surface of one reflector 64 and the inner surface of another reflector 64 adjacent to this reflector 64 is, for example, 3° to 15°. (UV light source)

[0084] The ultraviolet light source 70 is positioned above the mounting base 50. The ultraviolet light source 70 irradiates an ultraviolet irradiation area 54 surrounded by one or more reflectors 60 with ultraviolet light. The emission peak wavelength of the ultraviolet light is selected according to the curing characteristics of the hard coat material 12 or ultraviolet curable sheet 30 to be irradiated with ultraviolet light. The emission peak wavelength of the ultraviolet light is, for example, 220 nm to 400 nm, preferably 300 nm to 380 nm, and more preferably 360 nm to 370 nm. Suitable ultraviolet light sources 70 include semiconductor elements such as ultraviolet light-emitting diodes and ultraviolet semiconductor lasers, or mercury valves. [Method for manufacturing optical components]

[0085] The manufacturing method for the optical component on which the hard coat material 12 is placed on the surface can be the same as the manufacturing method for the light-emitting device described above, except for the step of combining it with the light source 1. [Industrial applicability]

[0086] The method for manufacturing a light-emitting device, a method for manufacturing an optical component, and an ultraviolet irradiation device disclosed herein can be suitably used, for example, as a flash light source for cameras in smartphones, tablets, and personal computers, a light source for in-vehicle monitors, or a light source for HMDs and smart glasses. [Explanation of symbols]

[0087] 1000...UV irradiation device 100, 100'... Light-emitting device 1...Light source 2…Light-emitting element 3…Wavelength conversion component 4…Covering material 5… Implemented circuit board 6… Fixing member 10…Optical components 11…Subcoat material 12…Hard coat material 30… UV-curing sheet 32...Adhesive surface 50… Mounting platform 52…Conveyor Unit 54…UV irradiation area 60...Reflector 61… Directly facing reflector 62…Side reflector 64…Small reflector 65…Angle adjustment area 70...UV light source

Claims

1. A method for manufacturing a light-emitting device comprising a light source and an optical member positioned above the light source, A process to prepare an ultraviolet-curable sheet in which the lower surfaces of multiple optical components, each coated with an uncured ultraviolet-curable hard coat material on its top and sides, are arranged so as to be in contact with the adhesive surface on its top surface, A step of curing the hard coat material on the plurality of optical members on the UV-curable sheet and the UV-curable sheet, and irradiating them with ultraviolet light to weaken the adhesive strength of the adhesive surface, A step of peeling off the plurality of optical members from the UV-curable sheet, A step of obtaining multiple light-emitting devices by combining each of the peeled-off optical components with a light source, A method for manufacturing a light-emitting device that includes [a specific component].

2. A method for manufacturing a light-emitting device according to claim 1, A method for manufacturing a light-emitting device, wherein in the step of irradiating with ultraviolet light, one or more reflectors are placed around the plurality of optical members, and ultraviolet light is irradiated from above the plurality of optical members.

3. A method for manufacturing a light-emitting device according to claim 2, A method for manufacturing a light-emitting device, wherein in the step of irradiating with ultraviolet light, a part of the reflector is positioned below the ultraviolet-curable sheet.

4. A method for manufacturing a light-emitting device according to any one of claims 1 to 3, A method for manufacturing a light-emitting device, wherein, in the step of preparing the ultraviolet-curable sheet, the side surface of the optical component is recessed inward compared to the top and bottom surfaces.

5. A method for manufacturing a light-emitting device according to any one of claims 1 to 4, A method for manufacturing a light-emitting device, wherein in the step of preparing the ultraviolet-curable sheet, the optical component is a Fresnel lens, a convex lens, or a concave lens.

6. A method for manufacturing a light-emitting device according to any one of claims 1 to 5, A method for manufacturing a light-emitting device, wherein in the preparation step described above, the optical component is a mixture of a polycarbonate copolymer and polycarbonate.

7. A method for manufacturing a light-emitting device according to any one of claims 1 to 6, A method for manufacturing a light-emitting device, wherein the emission peak wavelength of the ultraviolet light in the step of irradiating the device is 220 nm or more and 400 nm or less.

8. A method for manufacturing an optical component having an ultraviolet-curable hard coat material formed on its surface, A process to prepare an ultraviolet-curable sheet in which the lower surfaces of multiple optical components, each coated with an uncured ultraviolet-curable hard coat material on its top and sides, are arranged so as to be in contact with the adhesive surface on its top surface, A step of curing the hard coat material on the plurality of optical members on the UV-curable sheet and the UV-curable sheet, and irradiating them with ultraviolet light to weaken the adhesive strength of the adhesive surface, A step of peeling off the plurality of optical members from the UV-curable sheet, A method for manufacturing optical components including [specific components].

9. An ultraviolet irradiation device for irradiating an optical component with ultraviolet light, A mounting platform for placing an ultraviolet-curing sheet on which multiple optical components, each coated with an uncured ultraviolet-curing hard coat material on its top and sides, are arranged so that their bottom surfaces are in contact with the top surface, One or more reflectors are arranged around the aforementioned mounting platform, An ultraviolet light source that irradiates ultraviolet light into the ultraviolet irradiation area surrounded by the one or more reflectors from above the mounting platform, A UV irradiation device equipped with the following features.

10. The ultraviolet irradiation device according to claim 9, An ultraviolet irradiation device comprising one or more reflectors, with four reflectors arranged so as to surround each of the four sides of the base described above.

11. An ultraviolet irradiation device according to claim 9 or 10, The above-mentioned one or more reflectors are configured as an ultraviolet irradiation device consisting of a plurality of small reflectors connected together.

12. The ultraviolet irradiation device according to claim 11, An ultraviolet irradiation device having an angle adjustment region in which the plurality of small reflectors are arranged such that the angle between the inner surface of each small reflector and the horizontal direction becomes smaller in the direction from top to bottom.

13. The ultraviolet irradiation device according to claim 12, An ultraviolet irradiation device wherein, in the angle adjustment region, the inner surface of one of the small reflectors and the inner surface of another small reflector adjacent to the first small reflector are inclined at an angle of 3° to 15°.

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