Method for manufacturing lens with electronic lighting control sheet, method for manufacturing electronic lighting control sheet, and electronic lighting control sheet

Abstract

To provide a technique for facilitating to provide a coating layer on an electrochromic sheet.SOLUTION: A method for manufacturing a lens with an electronic lighting control sheet that has an optical element, and an electronic lighting control sheet having an EC functional layer, a first base material provided on a surface on a surface side of the EC functional layer and a second base material provided on a surface on a backside of the EC functional layer, in which the second base material of the electronic lighting control sheet and a surface on the surface side of the optical element are joined to each other, includes: a preparation step S10 of preparing the electronic lighting control sheet; an injection molding step (resin layer molding step S40) of arranging the first base material of the electronic lighting control sheet so as to abut on inside a mold, injecting a resin material of the optical element into a cavity of the mold, and providing the optical element on the second base material of the electronic lighting control sheet, and further includes a surface treatment step S14 of subjecting the surface of the first base material of the electronic lighting control sheet to surface treatment, before and after the preparation step S10.SELECTED DRAWING: Figure 12

Description

[Technical field]

[0001] The present invention relates to a method for manufacturing a lens with an electronic light control sheet, a method for manufacturing an electronic light control sheet, and an electronic light control sheet. [Background technology]

[0002] The phenomenon in which a reversible oxidation-reduction reaction occurs and the color changes reversibly when a voltage is applied is called electrochromism, and in recent years, electrochromic elements using electrochromic materials that exhibit this electrochromism have been proposed (for example, see Patent Document 1).

[0003] This electrochromic element develops color when a positive voltage is applied to it, and loses color and becomes transparent when a negative voltage is applied to it. Therefore, by providing the electrochromic element with a switch that can switch between applying a positive voltage and a negative voltage, it becomes possible to cause the electrochromic element to develop color and lose color at any desired timing.

[0004] By providing a lens with an electronic light control sheet (electrochromic sheet) equipped with an electrochromic element, it is possible to make it possible to make eyewear such as glasses or sunglasses so that the lenses of the eyewear can be switched between coloring and decoloring at any time by turning a switch on / off. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2020-106786 A Summary of the Invention [Problem to be solved by the invention]

[0006] Incidentally, eyewear such as spectacles and sunglasses may be provided with a coating layer having functions such as hard coating, ultraviolet absorption, and coloring. It is desirable to provide a coating layer on lenses having electrochromic sheets to achieve similar functions. In general, electrochromic sheets are covered with a protective sheet (protective film) during the manufacturing process, which makes surface treatment difficult, and therefore there has been a demand for a technology that makes it easy to provide a coating layer on an electrochromic sheet.

[0007] An object of the present invention is to provide a technique that makes it easy to provide a coating layer on an electrochromic sheet. [Means for solving the problem]

[0008] According to the present invention, the following inventions are provided. (1) A method for manufacturing a lens with an electronic light control sheet, the lens comprising an optical element, an electronic light control sheet having an EC functional layer, a first substrate provided on a front surface of the EC functional layer, and a second substrate provided on a back surface of the EC functional layer, the second substrate of the electronic light control sheet being bonded to a front surface of the optical element, the method comprising: A preparation step of preparing the electronic light control sheet; an injection molding process in which a first base material of the electronic light control sheet is disposed so as to contact the inside of the mold, and a resin material of the optical element is injected into a cavity of the mold to provide the optical element on the second base material of the electronic light control sheet; having The manufacturing method further comprises a surface treatment step of performing a surface treatment on the surface of the first base material of the electronic light control sheet before or after the preparation step. (2) The manufacturing method described in (1), wherein the surface treatment in the surface treatment step includes a UV treatment of irradiating ultraviolet light onto the surface of the first substrate of the electronic light control sheet. (3) The UV treatment was carried out using a high-pressure mercury lamp with an integrated light quantity of 500 mJ / cm in the wavelength range of 320 to 390 nm. 2The manufacturing method described in (2), in which irradiation is performed so as to achieve the following: (4) The manufacturing method according to any one of (1) to (3), further comprising a bending step of forming the electronic light control sheet into a predetermined shape prior to the injection molding step. (5) The surface of the first base material of the electronic light control sheet prepared before and after the preparation step is covered with a protective sheet, A manufacturing method described in any one of (1) to (4), in which, in the surface treatment step, the protective sheet is removed from the surface of the first substrate of the electronic light-adjusting sheet, and the surface treatment is performed on the exposed surface. (6) The manufacturing method according to (5), wherein the protective sheet is a self-adhesive type sheet material that does not have an adhesive member. (7) 7. The method according to claim 1, further comprising a coating step of forming a coating layer on the surface of the first base material that has been subjected to the surface treatment by using any one of the following methods: sputtering, vacuum deposition, ion plating, chemical vapor deposition, spray coating, dipping coating, and flow coating. (8) The manufacturing method according to any one of (1) to (7), wherein the surface of the first base material that has been subjected to the surface treatment has a surface roughness Ra of 5 to 50 μm. (9) 9. The method according to claim 1, wherein the surface of the first base material that has been subjected to the surface treatment has a water contact angle of 10 to 90 degrees. (10) A method for producing an electronic light control sheet having an EC functional layer, a first substrate provided on a front surface of the EC functional layer, and a second substrate provided on a back surface of the EC functional layer, the second substrate being bonded to a front surface of an optical element, the method comprising: A method for producing an electronic light controlling sheet, comprising a substrate surface treatment step of performing a surface treatment on the surface of the first substrate. (11) An electronic light control sheet having an EC functional layer, a first substrate provided on a front surface of the EC functional layer, and a second substrate provided on a back surface of the EC functional layer, the second substrate being bonded to a front surface of an optical element, An electronic light control sheet having a coating layer on a surface of the first substrate. Effect of the Invention

[0009] According to the present invention, a technique can be provided that makes it easy to provide a coating layer on an electrochromic sheet. [Brief description of the drawings]

[0010] [Figure 1] 1 is a perspective view showing sunglasses equipped with lenses having a curved sheet in which the electrochromic sheet of the first embodiment is curved. FIG. [Diagram 2] 3A to 3C are schematic diagrams for explaining a method for manufacturing a lens having a curved sheet in which the electrochromic sheet of the first embodiment is curved. [Diagram 3] FIG. 1 is a plan view showing an electrochromic sheet according to a first embodiment. [Figure 4] 4 is a vertical cross-sectional view taken along line AA of a main portion of the electrochromic sheet shown in FIG. 3 according to the first embodiment. FIG. [Diagram 5] FIG. 2 is a plan view showing a lens having a curved sheet according to the first embodiment. [Figure 6] 6 is a vertical cross-sectional view of a main portion of the lens shown in FIG. 5 according to the first embodiment, taken along line BB. [Figure 7] 1 is a longitudinal sectional view of an electrochromic sheet according to a first embodiment. FIG. [Figure 8] 1 is a cross-sectional view of an electrochromic sheet to which a protective sheet according to a first embodiment has been attached. [Figure 9] FIG. 2 is a cross-sectional view of an electrochromic sheet having a coating layer of the first embodiment. [Figure 10]1 is a cross-sectional view of an electrochromic sheet having a coating layer to which a protective sheet of a first embodiment is attached. FIG. [Figure 11] 4A to 4C are diagrams illustrating the molding of a resin layer (optical element) by injecting a resin material into a mold in a resin layer molding step (injection step) in the first embodiment. [Figure 12] 4 is a flowchart of a method for manufacturing the lens according to the first embodiment. [Figure 13] 10 is a flowchart of a method for manufacturing a lens according to a second embodiment. [Figure 14] 10 is a flowchart of a method for manufacturing a lens according to a third embodiment. [Figure 15] 10 is a flowchart of a method for manufacturing a lens according to a fourth embodiment. [Figure 16] 13 is a flowchart of a method for manufacturing a lens according to a fifth embodiment. [Figure 17] 13 is a flowchart of a method for manufacturing a lens according to a sixth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] <Summary> In the following, in this embodiment, when manufacturing a lens with an electrochromic sheet (electronic light control sheet), the surface of the electrochromic sheet (the surface of the first substrate) is surface-treated. This makes it possible to effectively perform coating treatment in the subsequent processing. Below, an example of sunglasses having lenses with electronic light control sheets will be given.

[0012] <First embodiment> <Sunglasses> 1 is a perspective view showing sunglasses 100 equipped with lenses 30 having curved sheets 120 each having a curved electrochromic sheet 150 according to the present embodiment. In the following description, when sunglasses 100 are worn on the head of a user, the surface of lens 30 facing the user's eyes is referred to as the back surface, and the opposite surface is referred to as the front surface.

[0013] 1, the sunglasses 100 include a frame 20 and a lens 30 (spectacle lens). The lens 30 may or may not have a light collecting function.

[0014] The frame 20 is worn on the head of a user and is for positioning the lenses 30 in the vicinity of the front of the user's eyes. The frame 20 has a rim portion 21, a bridge portion 22, a temple portion 23, and a nose pad portion 24.

[0015] The rim portions 21 are ring-shaped, one for each of the right and left eyes, and have lenses 30 attached to their insides. This allows the user to view external information through the lenses 30.

[0016] The lens 30 includes a curved sheet 120 that is formed by subjecting an electrochromic sheet (electronic light control sheet) 150 to a thermal bending process to be curved. The lens 30 reversibly develops and loses color at any timing by switching the application of voltage to an electrochromic element 60 of the electrochromic sheet 150. The lens 30 includes connection terminals at positions corresponding to the connecting portions where the bridge portion 22 and the temple portion 23 are connected to the rim portion 21 when the lens 30 is attached to the inside of the rim portion 21. These connection terminals are electrically connected to a switch 25 and a battery 26 provided in the temple portion 23, which will be described later, via wiring.

[0017] The bridge portion 22 is rod-shaped and is located in front of the upper part of the user's nose when the glasses are worn on the user's head, connecting the pair of rim portions 21 together.

[0018] The temple portion 23 is shaped like a temple and is connected to the edge of each rim portion 21 on the opposite side to the position where the bridge portion 22 is connected. The temple portion 23 is hung on the user's ear when wearing the glasses on the user's head.

[0019] The temple portion 23 has a switch 25 exposed on its surface so as to be operable, and a built-in battery 26. The switch 25 and the battery 26 are electrically connected to a connection terminal provided on the lens 30 via wiring. This allows the application of a positive voltage, a negative voltage, or even no voltage to the electrochromic element 60 of the curved sheet 120 provided on the lens 30, by operating the switch 25.

[0020] The nose pads 24 are provided on the edges of the rims 21 that correspond to the nose of the user when the sunglasses 100 are worn on the head of the user, and come into contact with the nose of the user, forming a shape that corresponds to the contact portion of the nose of the user at this time. This allows the sunglasses 100 to be stably maintained when worn.

[0021] The materials constituting the respective parts of the frame 20 are not particularly limited, and may be, for example, various metal materials, various resin materials, etc. The shape of the frame 20 is not limited to that shown in the figure, so long as it can be worn on the head of the user.

[0022] Furthermore, the sunglasses 100 may have a frame 20 or may be frameless from the standpoint of fashionability, lightweightness, and the like.

[0023] Furthermore, in this embodiment, glasses equipped with lenses 30 are applied to sunglasses 100, but this is not limited to this, and the glasses may be, for example, prescription glasses, fashion glasses, goggles that protect the eyes from wind, rain, dust, chemicals, etc.

[0024] FIG. 2 is a schematic diagram for explaining a manufacturing method of a lens 30 having a curved sheet 120 in which an electrochromic sheet 150 is curved. FIG. 3 is a plan view of the electrochromic sheet 150. FIG. 4 is a vertical cross-sectional view of the main part of the electrochromic sheet 150 shown in FIG. 3 taken along line AA. FIG. 5 is a plan view showing a lens 30 having a curved sheet 120. FIG. 6 is a vertical cross-sectional view of the main part of the lens 30 shown in FIG. 5 taken along line BB. FIG. 7 is a cross-sectional view of the electrochromic sheet 150, mainly a vertical cross-sectional view of the region of the electrochromic element 60. FIG. 8 is a cross-sectional view of the electrochromic sheet 150 to which a protective sheet 50 (protective film) is attached. FIG. 9 is a cross-sectional view of the electrochromic sheet 150 having a coating layer 19. FIG. 10 is a cross-sectional view of the electrochromic sheet 150 having a coating layer 19 to which a protective sheet 50 is attached. In FIG. 6, the curved sheet 120 is actually curved (convex upward in the drawing), but for convenience of explanation, it is depicted as being flat.

[0025] <Lens> The lens 30 is a light-transmitting member having a plate-like overall shape curved outward, and includes a resin layer 35 (molded layer) which is the lens body, and a curved sheet 120 provided on a curved convex surface 36 of the resin layer 35. As described above, the lens 30 may or may not have a light-collecting function. In addition, a coating layer 19 is provided on the surface of the lens 30, more specifically, on the surface 11a of the first substrate 11, after a predetermined surface treatment is performed. The curved sheet 120 is a sheet member obtained by subjecting a flat sheet-like electrochromic sheet 150 to a thermal bending process under heating to a curved shape having a curved convex surface 121 and a curved concave surface 122 (see FIG. 2(c)).

[0026] <Resin layer (lens body)> The resin layer 35 is the lens body, has optical transparency, and is located on the rear side of the lens 30. When the lens 30 is given a light collecting function, the resin layer 35 has the light collecting function.

[0027] The material for the resin layer 35 is not particularly limited as long as it is a resin material having optical transparency, and examples thereof include various curable resins such as various thermoplastic resins, thermosetting resins, and photocurable resins, and one or a combination of two or more of these can be used.

[0028] Examples of the resin material include polyolefins such as polyethylene, polypropylene, and ethylene-propylene copolymers, polyvinyl chloride, polystyrene, polyamide, polyimide, polycarbonate, poly-(4-methylpentene-1), ionomers, acrylic resins, polymethyl methacrylate, acrylonitrile-butadiene-styrene copolymers (ABS resins), triacetyl cellulose (TAC), acrylonitrile-styrene copolymers (AS resins), butadiene-styrene copolymers, polyesters such as polyethylene terephthalate (PET) and polybutylene terephthalate (PBT), polyethers, polyether ketones (PEK), and polysilicon. Examples of the resin include ether ether ketone (PEEK), polyetherimide, polyacetal (POM), polyphenylene oxide, polysulfone, polyethersulfone, polyphenylene sulfide, polyarylate, aromatic polyester (liquid crystal polymer), polytetrafluoroethylene, polyvinylidene fluoride, other fluorine-based resins, epoxy resin, phenolic resin, urea resin, melamine resin, silicone resin, polyurethane, etc., or copolymers, blends, polymer alloys, etc. that are primarily made of these, but it is preferable that the resin material be the same or identical to the resin material that primarily constitutes the first substrate 11 provided in the curved sheet 120 described below. This can improve the adhesion between the resin layer 35 and the curved sheet 120. In addition, since the refractive index difference between the resin layer 35 and the curved sheet 120 (first substrate 11) can be set low, diffuse reflection of light between the resin layer 35 and the curved sheet 120 can be appropriately suppressed or prevented, and light can be transmitted between the resin layer 35 and the curved sheet 120 with excellent light transmittance. The refractive index difference between the resin layer 35 and the first substrate 11 of the curved sheet 120 is preferably 0.2 or less, and more preferably 0.1 or less, so that the effect obtained by setting the refractive index difference low can be more significantly exhibited.

[0029] The thickness of the resin layer 35 is not particularly limited, and is preferably, for example, 0.5 mm to 20.0 mm, and more preferably 1.0 mm to 10.0 mm, which allows the lens 30 to have both a relatively high strength and a light weight.

[0030] <Electrochromic sheet> The shape of the electrochromic sheet 150 in a plan view will be described. 3, the electrochromic sheet 150 has a substantially rectangular shape in plan view. The shape of the electrochromic sheet 150 may be any of various shapes, such as a rectangular shape, a circular shape, or an elliptical shape. The shape to be adopted may be appropriately selected, but considering the shape to be trimmed when obtaining the final lens 30 and the effective utilization rate when obtaining the electrochromic sheet 150 by dividing the element-sealing connecting sheet 110 described later, it is preferable to adopt a substantially rectangular shape that is horizontally long in plan view.

[0031] In this embodiment, for example, as shown in FIG. 3, when viewed in a plane, the shape is a horizontally elongated shape with the upper and lower sides of the circular shape removed. Specifically, upper side 155 and lower side 156 are straight long sides, and right side 157 and left side 158 are curved short sides (arcs of the original circular shape).

[0032] <Structure of electrochromic sheet> Next, the structure of the electrochromic sheet 150 will be described. The electrochromic sheet 150 includes a first substrate 11 (first base material), a second substrate 12 (second base material), a sealing portion 55, an electrochromic element 60, a first conductive portion 17, a second conductive portion 18, a third conductive portion 51, a fourth conductive portion 52, a first auxiliary electrode 15, and a second auxiliary electrode 16. Furthermore, a coating layer 19 is provided on the surface of the first substrate 11 (first base material).

[0033] Each of the members constituting the electrochromic sheet 150 will now be described. The first substrate 11 supports other components including the electrochromic element 60, and also constitutes the outermost layer of the electrochromic sheet 150, which allows other components including the electrochromic element 60 to be arranged between the first substrate 11 and the second substrate 12, and functions as a protective layer to protect the electrochromic element 60 etc.

[0034] In the electrochromic sheet 150, the first substrate 11 and the second substrate 12 constitute the outermost layer of the electrochromic sheet 150, so that other members including the electrochromic element 60 are not exposed on the surface of the electrochromic sheet 150. Furthermore, the first substrate 11 is provided with a coating layer 19. Therefore, when the electrochromic sheet 150 is applied to a lens 30 equipped with a curved sheet 120 having a curved shape, it is possible to reliably prevent the electrochromic element 60 from being struck by sand, dust, or even rain, or from being worn by other members. Therefore, it is possible to reliably prevent the characteristics of the electrochromic element 60 from being adversely affected by such strikes or friction.

[0035] <First board> There are no particular limitations on the first substrate 11 as long as it is made mainly of a transparent resin material, but it is preferable that the first substrate 11 contains a transparent resin (base resin) having thermoplasticity as the main material.

[0036] The transparent resin is not particularly limited, but examples thereof include transparent resins such as acrylic resins, polystyrene resins, polyethylene resins, polypropylene resins, polyester resins such as polyethylene terephthalate (PET) and polyethylene naphthalate (PEN), polycarbonate resins, polyamide resins, cycloolefin resins, triacetyl cellulose (TAC) resins, vinyl chloride resins, and polyacetal resins, and one or more of these resins may be used in combination. Among these, polycarbonate resins or polyamide resins are preferred, and polycarbonate resins are particularly preferred. Polycarbonate resins are rich in transparency (translucency) and mechanical strength such as rigidity, and further have high heat resistance, so that the use of polycarbonate resins as the transparent resin can improve the transparency of the first substrate 11 and the impact resistance and heat resistance of the first substrate 11.

[0037] As the polycarbonate resin, various resins can be used, among which aromatic polycarbonate resins are preferable, which have aromatic rings in their main chains, and thus can provide first substrate 11 with superior strength.

[0038] The aromatic polycarbonate resin is synthesized, for example, by an interfacial polycondensation reaction between bisphenol and phosgene, or an ester exchange reaction between bisphenol and diphenyl carbonate.

[0039] Examples of bisphenols include bisphenol A and bisphenol (modified bisphenol) which is the source of the repeating unit of polycarbonate represented by the following formula (1A).

[0040] [ka] (In formula (1A), X is an alkyl group having 1 to 18 carbon atoms, an aromatic group, or a cyclic aliphatic group; Ra and Rb are each independently an alkyl group having 1 to 12 carbon atoms; m and n are each an integer of 0 to 4; and p is the number of repeating units.)

[0041] Specific examples of bisphenols that are the source of the repeating units of the polycarbonate represented by the formula (1A) include 4,4'-(pentane-2,2-diyl)diphenol, 4,4'-(pentane-3,3-diyl)diphenol, 4,4'-(butane-2,2-diyl)diphenol, 1,1'-(cyclohexanediyl)diphenol, 2-cyclohexyl-1,4-bis(4-hydroxyphenyl)benzene, 2,3-biscyclohexyl-1,4-bis(4-hydroxyphenyl)benzene, 1,1'-bis(4-hydroxy-3-methylphenyl)cyclohexane, and 2,2'-bis(4-hydroxy-3-methylphenyl)propane, and any of these may be used alone or in combination of two or more.

[0042] In particular, it is preferable that the polycarbonate resin contains, as the main component, a bisphenol-type polycarbonate resin having a skeleton derived from bisphenol. By using such a bisphenol-type polycarbonate resin, first substrate 11 exhibits even greater strength.

[0043] Furthermore, as long as first substrate 11 has optical transparency, its color may be any color, such as colorless, red, blue, or yellow.

[0044] These colors can be selected by incorporating a dye or pigment into the first substrate 11. Examples of the dye include acid dyes, direct dyes, reactive dyes, and basic dyes, and one or more of these dyes may be used in combination.

[0045] Specific examples of dyes include CI Acid Yellow 17, 23, 42, 44, 79, 142, CI Acid Red 52, 80, 82, 249, 254, 289, CI Acid Blue 9, 45, 249, CI Acid Black 1, 2, 24, 94, CI Food Black 1, 2, CI Direct Yellow 1, 12, 24, 33, 50, 55, 58, 86, 132, 142, 144, 173, CI Direct Red 1, 4, 9, 80, 81, 225, 227, CI Direct Blue 1, 2, 15, 71, 86, 87, 98, 165, 199, 202, CI Direct Black 19, 38, 51, 71, 154, 168, 171, 195, and CI Reactive Red. 14, 32, 55, 79, 249, CI Reactive Black 3, 4, 35, etc.

[0046] If necessary, the first substrate 11 may contain, in addition to the transparent resin, dye, or pigment described above, various additives such as antioxidants, fillers, plasticizers, light stabilizers, ultraviolet absorbers, heat absorbers, and flame retardants.

[0047] Moreover, this first substrate 11 may be either stretched or unstretched.

[0048] Furthermore, the refractive index of the first substrate 11 at a wavelength of 589 nm is preferably 1.3 or more and 1.8 or less, and more preferably 1.4 or more and 1.65 or less. By setting the refractive index n1 of the first substrate 11 within the above numerical range, it is possible to precisely suppress or prevent impairment of the function of the electrochromic element 60, which can switch between coloring (coloring) and decoloring at any timing by switching the switch 25 ON / OFF.

[0049] The average thickness of the first substrate 11 is preferably set to 0.01 mm or more and 10.0 mm or less, more preferably 0.1 mm or more and 5.0 mm or less. By setting the average thickness of the first substrate 11 within this range, it is possible to reduce the thickness of the electrochromic sheet 150 while accurately suppressing or preventing the electrochromic sheet 150 from bending.

[0050] The second substrate 12 is disposed opposite the first substrate 11 and supports other components including the electrochromic element 60, while also allowing other components including the electrochromic element 60 to be disposed between the first substrate 11 and the second substrate 12. The second substrate 12 constitutes the outermost layer of the electrochromic sheet 150 and functions as a protective layer that protects the electrochromic element 60.

[0051] In the electrochromic sheet 150, the first substrate 11 and the second substrate 12 constitute the outermost layer of the electrochromic sheet 150, so that other members including the electrochromic element 60 are not exposed on the surface of the electrochromic sheet 150. Therefore, when the electrochromic sheet 150 is applied to a lens 30 equipped with a curved sheet 120 having a curved shape, it is possible to reliably prevent the electrochromic element 60 from being struck by dust or even rain, or from being worn by other members, etc. Therefore, it is possible to reliably prevent the characteristics of the electrochromic element 60 from being adversely affected by such strikes or friction.

[0052] <Second board> The second substrate 12 may be made of the same material as that mentioned for the first substrate 11. The second substrate 12 and the first substrate 11 may be made of the same material (same type) or different materials.

[0053] Furthermore, like first substrate 11, second substrate 12 may be stretched or non-stretched.

[0054] The refractive index of the second substrate 12 at a wavelength of 589 nm may be the same as or different from the refractive index n1 of the first substrate 11, but is preferably 1.3 to 1.8, more preferably 1.4 to 1.65. By setting the refractive index n2 of the second substrate 12 within the above numerical range, it is possible to precisely suppress or prevent impairment of the function of the electrochromic element 60, which can switch between coloring and decoloring at any timing by turning the switch 25 ON / OFF.

[0055] The average thickness of the second substrate 12 may be the same as or different from that of the first substrate 11, but is preferably, for example, 0.01 mm to 10.0 mm, more preferably 0.1 mm to 5.0 mm. By setting the average thickness of the second substrate 12 within this range, it is possible to reduce the thickness of the electrochromic sheet 150 while accurately suppressing or preventing bending of the electrochromic sheet 150.

[0056] <Coating layer> 9, a coating layer 19 is provided on the surface 11a of the first substrate 11. The coating layer 19 may be a single layer or multiple layers. The coating layer 19 is obtained by applying a predetermined coating treatment to the surface 11a of the first substrate 11 that has been subjected to a surface treatment.

[0057] The coating layer 19 has functions such as diffusion, anti-glare, anti-reflection, anti-fouling, hard coat, ultraviolet absorption, light reduction, coloring, and anti-static. The coating layer 19 may have one or more functions.

[0058] As a method for forming the coating layer 19, a known method that is optimal for the function to be imparted is adopted, and for example, sputtering, vacuum deposition, ion plating, chemical vapor deposition, spray coating, dipping coating, and flow coating can be used.

[0059] The average thickness of the coating layer 19 is not particularly limited, but is preferably about 0.1 μm or more and 20 μm or less, and more preferably about 1 μm or more and 10 μm or less.

[0060] <Surface treatment> As a pretreatment before providing the above-mentioned coating layer 19, the surface 11a of the first substrate 11 is subjected to a surface treatment. Examples of the surface treatment that can be used include UV (ultraviolet) treatment, ozone treatment, plasma treatment, alkali treatment, and corona treatment. By performing the surface treatment, the surface free energy of the surface 11a of the first substrate 11 can be increased, and the coating layer 19 can be provided satisfactorily. UV (ultraviolet) treatment is preferably used because of the ease of controlling the surface treatment, etc.

[0061] The UV (ultraviolet) treatment is carried out by irradiating the surface 11a of the first substrate 11 with ultraviolet light. The light source for the UV (ultraviolet) treatment is not particularly limited, but for example, a low pressure mercury lamp, a medium pressure mercury lamp, a high pressure mercury lamp (including an ultra-high pressure mercury lamp), a xenon lamp, a halogen lamp, a carbon arc lamp, a tungsten lamp, a gallium lamp, an excimer laser, an LED light source, a chemical lamp, a black light lamp, a microwave excited mercury lamp, or a metal halide lamp can be used.

[0062] From the viewpoints of stability and intensity of irradiation energy and simplicity of the device, a high-pressure mercury lamp that irradiates ultraviolet rays in the UVA region (320 to 390 nm) wavelength range is preferably used. The cumulative light amount of the irradiated ultraviolet rays is 500 mJ / cm2 in the UVA region (320 to 390 nm) wavelength. 2 Less than 450 mJ / cm 2 Less than 400 mJ / cm is preferable. 2 The lower limit of the integrated light amount of the irradiated ultraviolet light is, for example, 20 mJ / cm 2 More than 50 mJ / cm 2 More than 80 mJ / cm is preferable. 2 The above is more preferable. By setting the conditions of the ultraviolet light to be irradiated as described above, it is possible to prevent the protective film from becoming too adherent and becoming difficult to peel off.

[0063] After the above surface treatment, surface 11a of first substrate 11 has the following characteristics with respect to surface roughness Ra and water contact angle.

[0064] The surface roughness Ra of the surface 11a of the first substrate 11 that has been subjected to the surface treatment is 5 to 50 μm, preferably 7 to 45 μm, and more preferably 10 to 40 μm. The surface roughness Ra is measured in accordance with JIS B0601:2013. By setting the surface roughness Ra of the surface 11a of the first substrate 11 after the surface treatment within the above range, it is possible to increase the adhesion of the coating layer 19 and ensure high transparency even when the coating layer 19 is formed.

[0065] The water contact angle of the surface 11a of the first substrate 11 that has been subjected to the surface treatment is 10 to 90 degrees, preferably 20 to 85 degrees, and more preferably 30 to 80 degrees. The water contact angle can be measured, for example, by the θ / 2 method. The θ / 2 method is a method for determining the contact angle from the angle of a line connecting the left and right end points of a droplet to the apex with respect to a solid surface. By setting the water contact angle within the above range, it is possible to achieve high adhesion with the coating layer 19 and make it difficult to peel off.

[0066] <Electrochromic element> The electrochromic element 60 is a light-emitting element that can be switched between coloring (coloring) and decoloring at any timing by switching the switch 25 ON / OFF, and is provided in a colored region 70 partitioned by a sealing portion 55.

[0067] In this embodiment, the electrochromic element 60 includes a first electrode 13 and a first electrochromic layer 63, which are sequentially stacked on the first substrate 11 toward the second substrate 12, a second electrode 14 and a second electrochromic layer 64, which are sequentially stacked on the second substrate 12 toward the first substrate 11, and an electrolyte layer 65 filled between the first electrochromic layer 63 and the second electrochromic layer 64 (see, for example, FIG. 7).

[0068] <First electrode and second electrode> The first electrode 13 and the second electrode 14 are electrodes that supply electrons between the first electrode 13 and the second electrode 14, or receive electrons from between the first electrode 13 and the second electrode 14, when a positive voltage or a negative voltage is applied to the electrochromic element 60 by switching the switch 25.

[0069] The constituent material of the first electrode 13 and the second electrode 14 is not particularly limited as long as it is a transparent conductive material, and examples thereof include oxides such as ITO (indium tin oxide), FTO (F-doped tin oxide), ATO (antimony tin oxide), IZO (indium zinc oxide), In2O3, SnO2, Sb-containing SnO2, and Al-containing ZnO, Au, Pt, Ag, Cu, or alloys containing these, and one or more of these may be used in combination.

[0070] The average thickness of the first electrode 13 and the second electrode 14 is adjusted so as to obtain the electrical resistance value required for the oxidation-reduction reaction of the first and second electrochromic layers 63, 64. For example, when ITO is used as the constituent material of the first electrode 13 and the second electrode 14, the average thickness is preferably set to approximately 50 nm or more and 200 nm or less, more preferably approximately 100 nm or more and 150 nm or less.

[0071] <First electrochromic layer> The first electrochromic layer 63 contains, as a main material, a material that exhibits color through an oxidation reaction, and is thus a layer that is colored.

[0072] The material contained as the main material in this first electrochromic layer 63 and which exhibits color through an oxidation reaction is not particularly limited, and examples thereof include a polymer obtained by polymerizing a composition containing a radically polymerizable compound having a triarylamine, a bisacridan compound, a Prussian blue complex, and nickel oxide, and one or more of these may be used in combination.

[0073] Examples of polymers obtained by polymerizing a composition containing a radically polymerizable compound having a triarylamine include those described in JP-A-2016-45464 and JP-A-2020-138925.

[0074] Furthermore, an example of a Prussian blue-type complex is a material made of Fe(III)4[Fe(II)(CN)6]3.

[0075] Among these, a polymer obtained by polymerizing a composition containing a radically polymerizable compound having triarylamine is preferably used, since it can be operated at a constant voltage, has excellent durability during repeated use, and can provide an electrochromic element with high contrast.

[0076] In addition, the composition containing the radical polymerizable compound having a triarylamine may contain another radical polymerizable compound different from the radical polymerizable compound having a triarylamine, and the polymer obtained by polymerizing such a composition may be composed of a crosslinked product in which these radical polymerizable compounds are crosslinked.

[0077] The average thickness of such a first electrochromic layer 63 is not particularly limited, but is preferably about 0.1 μm or more and 30 μm or less, and more preferably about 0.4 μm or more and 10 μm or less.

[0078] <Second electrochromic layer> The second electrochromic layer 64 contains, as a main material, an electrochromic material that changes from transparent to colored by a reduction reaction, and is thus a layer that is colored.

[0079] The second electrochromic layer 64 is preferably made of an electrochromic material having the same color tone as the first electrochromic layer 63. This improves the maximum color density, and as a result, the contrast can be improved.

[0080] On the other hand, when materials of different colors are used, it becomes possible to mix colors. Also, by coloring the first electrode 13 and the second electrode 14 through oxidation and reduction reactions, the driving voltage of the electrochromic element 60 can be effectively reduced, and the repetitive durability of the electrochromic element 60 can be improved.

[0081] The material contained as the main material in the second electrochromic layer 64 and which exhibits coloration by a reduction reaction is not particularly limited, and examples thereof include inorganic electrochromic compounds, organic electrochromic compounds, conductive polymers, etc., and one or a combination of two or more of these can be used.

[0082] Examples of inorganic electrochromic compounds include tungsten oxide, molybdenum oxide, iridium oxide, and titanium oxide, among which tungsten oxide is preferred. Tungsten oxide is preferably used because it has a low color development / discoloration potential due to its low reduction potential, and is also excellent in durability because it is an inorganic material.

[0083] In addition, as the organic electrochromic compound, for example, azobenzene-based, anthraquinone-based, diarylethene-based, dihydroprene-based, dipyridine-based, styryl-based, styrylspiropyran-based, spirooxazine-based, spirothiopyran-based, thioindigo-based, tetrathiafulvalene-based, terephthalic acid-based, triphenylmethane-based, triphenylamine-based, naphthopyran-based, viologen-based, pyrazoline-based, phenazine-based, phenylenediamine-based, phenoxazine-based, phenothiazine-based, phthalocyanine-based, fluoran-based, fulgide-based, benzopyran-based, metallocene-based, and other low molecular weight organic electrochromic compounds can be mentioned, among which viologen-based compounds and dipyridine-based compounds are preferred.These compounds are preferably used because they have low color development and decolorization potential and show good color value.

[0084] Examples of viologen compounds include those described in Japanese Patent No. 3955641 and JP-A-2007-171781, etc. Examples of dipyridine compounds include those described in Japanese Patent No. 2007-171781 and JP-A-2008-116718, etc.

[0085] Furthermore, examples of the conductive polymer include polypyrrole, polythiophene, polyaniline, and derivatives thereof.

[0086] The average thickness of the second electrochromic layer 64 is not particularly limited, but is preferably about 0.2 μm to 5.0 μm, and more preferably about 1.0 μm to 4.0 μm. If the average thickness is less than 0.2 μm, it may be difficult to obtain a desired color density depending on the type of electrochromic material, and if it exceeds 5.0 μm, the manufacturing cost may increase and visibility may decrease due to coloring depending on the type of electrochromic material.

[0087] <Electrolyte layer> The electrolyte layer 65 is filled between the first electrochromic layer 63 and the second electrochromic layer 64, and contains an electrolyte having ion conductivity.

[0088] The electrolyte is not particularly limited, but examples thereof include inorganic ion salts such as alkali metal salts and alkaline earth metal salts, quaternary ammonium salts, and supporting salts of acids and alkalis. Specific examples include LiClO4, LiBF4, LiAsF6, LiPF6, LiCF3SO3, LiCF3COO, KCl, NaClO3, NaCl, NaBF4, NaSCN, KBF4, Mg(ClO4)2, Mg(BF4)2, etc., and one or a combination of two or more of these can be used.

[0089] In addition, ionic liquids can also be used as electrolyte materials. Among these ionic liquids, organic ionic liquids are preferably used because they have a molecular structure that shows liquidity over a wide temperature range including room temperature and are easy to handle.

[0090] As the molecular structure of the organic ionic liquid, the cationic component may be, for example, an imidazole derivative such as N,N-dimethylimidazole salt, N,N-methylethylimidazole salt, or N,N-methylpropylimidazole salt; a pyridinium derivative such as N,N-dimethylpyridinium salt or N,N-methylpropylpyridinium salt; or an aliphatic quaternary ammonium derivative such as trimethylpropylammonium salt, trimethylhexylammonium salt, or triethylhexylammonium salt. In addition, it is preferable to use a fluorine-containing compound as the anionic component, taking into consideration stability in the atmosphere, such as BF4 - , CF3SO3 - , PF4 - , (CF3SO2)2N - etc.

[0091] Such an electrolyte material is preferably an ionic liquid containing any combination of cationic and anionic components.

[0092] The ionic liquid may be directly dissolved in any of the photopolymerizable monomers, oligomers, and liquid crystal materials. If the ionic liquid has poor solubility in these materials, it may be dissolved in a small amount of solvent to obtain a solution, and then this solution may be mixed with any of the photopolymerizable monomers, oligomers, and liquid crystal materials to dissolve the ionic liquid.

[0093] Examples of the solvent include propylene carbonate, acetonitrile, γ-butyrolactone, ethylene carbonate, sulfolane, dioxolane, tetrahydrofuran, 2-methyltetrahydrofuran, dimethylsulfoxide, 1,2-dimethoxyethane, 1,2-ethoxymethoxyethane, polyethylene glycol, alcohols, and mixed solvents thereof.

[0094] The electrolyte filled between the first electrochromic layer 63 and the second electrochromic layer 64 as the electrolyte layer 65 can be a low-viscosity liquid, or can take various forms such as a gel, a polymer cross-linked type, or a liquid crystal dispersion type. Among these, it is preferable that the electrolyte be formed into a gel or solid state. This can improve the element strength and reliability of the electrochromic element 60.

[0095] A preferred method for making the electrolyte layer 65 solid is, for example, a method in which a liquid containing an electrolyte and a solvent is held in a polymer resin. This allows the electrolyte layer 65 to have both high ionic conductivity and solid strength. In addition, the polymer resin is preferably, for example, a photocurable resin. This allows the electrolyte layer 65 in a solid state, and thus the electrochromic element 60, to be obtained at a low temperature and in a short time, compared to the case in which the electrolyte layer 65 in a solid state is obtained by thermal polymerization or evaporation of a solvent.

[0096] The average thickness of the electrolyte layer 65 is not particularly limited, but is preferably set to about 20 μm or more and 100 μm or less, and more preferably about 40 μm or more and 80 μm or less.

[0097] Between each layer between the first electrode 13 and the second electrode 14, an intermediate layer such as an insulating porous layer or a protective layer may be provided.

[0098] By configuring the electrochromic element 60 as described above, it is possible to switch between coloring (coloring) and decoloring at any desired timing by switching the switch 25 ON / OFF.

[0099] <Sealing part> The sealing portion 55 is disposed between the first substrate 11 and the second substrate 12, and has the function of defining a colored region 70 and sealing the electrochromic element 60 within this colored region 70.

[0100] The constituent material of this sealing portion 55 is not particularly limited as long as it is an insulating material having transparency, and examples thereof include resin materials such as acrylic resin and epoxy resin, and inorganic oxides such as silicon oxide (SiO2), silicon oxynitride (SiON), and aluminum oxide (Al2O3).

[0101] The average thickness of the sealing portion 55 is adjusted according to the average thickness of the electrochromic element 60, and is set, for example, preferably to about 20 μm or more and 100 μm or less, and more preferably to about 40 μm or more and 80 μm or less.

[0102] As described above, the electrochromic sheet 150 is configured such that the electrochromic elements 60 are disposed in the colored regions 70 defined by the sealing portions 55 between the first substrate 11 and the second substrate 12.

[0103] In the electrochromic sheet 150 having such a configuration, the first electrode 13 and the second electrode 14 of the electrochromic element 60 are each routed as patterned wiring beyond (extending) the colored region 70 defined by the sealing portion 55 at a position corresponding to the connecting portion where the bridge portion 22 and the temple portion 23 are connected to the rim portion 21 when the lens 30 is formed using the electrochromic sheet 150 and attached to the inside of the rim portion 21 (see, for example, Figure 1).

[0104] <First conductive part, second conductive part> As described above, the first conductive portion 17 is provided so as to fill the first hole portion 53, which is a through hole provided penetrating the sealing portion 55, so as to overlap in a plan view with the first electrode 13 provided as wiring extending from the colored region 70. In other words, the first electrode 13 provided as wiring beyond the colored region 70 between the first substrate 11 and the sealing portion 55 and the first conductive portion 17 is extended until it reaches the first conductive portion 17.

[0105] This first conductive portion 17 is electrically connected to the first electrode 13 via the first auxiliary electrode 15, and further, at the end portion along the thickness direction of the electrochromic sheet 150, it is exposed at a position that will be on the bridge portion 22 side when the lens 30 is formed using the electrochromic sheet 150 and attached to the inside of the rim portion 21.

[0106] The second conductive portion 18 is provided so as to fill the second hole portion 54, which is a through hole provided penetrating the sealing portion 55, so as to overlap in a plan view with the second electrode 14 provided as wiring extending from the colored region 70. In other words, the second electrode 14 provided as wiring beyond the colored region 70 between the second substrate 12 and the sealing portion 55 and the second conductive portion 18 is extended until it reaches the second conductive portion 18.

[0107] This second conductive portion 18 is electrically connected to the second electrode 14 via the second auxiliary electrode 16, and further, at the end portion along the thickness direction of the electrochromic sheet 150, it is exposed at a position that will be on the temple portion 23 side when the lens 30 is formed using the electrochromic sheet 150 and attached to the inside of the rim portion 21.

[0108] In this way, at the end along the thickness direction of the electrochromic sheet 150, the first conductive portion 17 and the second conductive portion 18 are exposed at different positions, such as on the bridge portion 22 side and the temple portion 23 side, and these first conductive portion 17 and second conductive portion 18 are electrically connected to the first electrode 13 and the second electrode 14, respectively.

[0109] Therefore, a voltage can be applied between the first electrode 13 and the second electrode 14 through the first conductive part 17 and the second conductive part 18 exposed at the end along the thickness direction of the electrochromic sheet 150. That is, the first conductive part 17 and the second conductive part 18 can be used as terminals when applying a voltage between the first electrode 13 and the second electrode 14. Therefore, after the step of obtaining the curved sheet 120 by bending processing described later or after the step of removing the protective sheet 50, the electrochromic sheet 150 can easily inspect the electrochromic element 60 provided therein by applying a voltage between the first electrode 13 and the second electrode 14 through the first conductive part 17 and the second conductive part 18. Therefore, it is easy to know whether or not a defect occurs in the electrochromic element 60 provided inside the electrochromic sheet 150.

[0110] The constituent material of these first conductive portion 17 and second conductive portion 18 is not particularly limited as long as it is a conductive material, but examples include conductive pastes such as silver paste, as well as metals such as gold and copper or alloys thereof.

[0111] Moreover, the first conductive portion 17 and the second conductive portion 18 are each independently set to have an average thickness of preferably about 20 μm to about 100 μm, more preferably about 40 μm to about 80 μm. By setting the average thickness of the first conductive portion 17 and the second conductive portion 18 exposed at the end portion along the thickness direction of the electrochromic sheet 150 within this range, the first conductive portion 17 and the second conductive portion 18 can be easily used as terminals when applying a voltage between the first electrode 13 and the second electrode 14.

[0112] In the present invention, as described above, the first conductive portion 17 and the second conductive portion 18 are exposed at different positions at the end portions along the thickness direction of the electrochromic sheet 150, but the exposure of the first conductive portion 17 and the second conductive portion 18 at the end portions is achieved as follows. That is, when the element-sealing connecting sheet 110 is punched in its thickness direction corresponding to each electrochromic element 60 to obtain individualized electrochromic sheets 150, this punching can be achieved by performing this punching so as to pass through the first conductive portion 17 and the second conductive portion 18 in a plan view.

[0113] Furthermore, as a result of punching out the element sealing connecting sheet 110 passing through the first conductive portion 17 and the second conductive portion 18, the first hole portion 53 and the second hole portion 54 each have a portion of their wall portion (inner surface) missing, and in this specification, the term "hole portion" also refers to those portions having such missing portions.

[0114] Furthermore, in this embodiment, the first hole portion 53 and the second hole portion 54 are both through holes that penetrate the sealing portion 55 in the thickness direction, but this is not limited to this, and the first hole portion 53 may be formed from the first substrate 11 side toward the second substrate 12 side with the sealing portion 55 remaining at its bottom, and the second hole portion 54 may be formed from the second substrate 12 side toward the first substrate 11 side with the sealing portion 55 remaining at its top.

[0115] <Third conductive part, fourth conductive part> The third conductive portion 51 overlaps the first electrode 13 extending from the colored region 70 as wiring in a plan view, and is provided so as to fill a third hole portion 57, which is a through hole provided penetrating the sealing portion 55, at a position closer to the colored region 70 (inner side) than the first hole portion 53, i.e., a position between the first conductive portion 17 and the electrochromic element 60 in a plan view (see FIG. 4, for example). The third conductive portion 51 is electrically connected to the first electrode 13 via the first auxiliary electrode 15.

[0116] This third conductive portion 51 is exposed at a position on the bridge portion 22 side when the edges are trimmed to create a cut-out piece that corresponds to the shape (lens shape) of the rim portion 21 in order to fit the lens 30 obtained using the electrochromic sheet 150 (curved sheet 120) inside the rim portion 21, as shown in Figure 1.

[0117] The fourth conductive portion 52 overlaps the second electrode 14 extending from the colored region 70 as wiring in a plan view, and is provided so as to fill a fourth hole portion 58, which is a through hole provided penetrating the sealing portion 55, at a position closer to the colored region 70 (inner side) than the second hole portion 54, that is, at a position between the second conductive portion 18 and the electrochromic element 60 in a plan view (see FIG. 4, for example). The fourth conductive portion 52 is electrically connected to the second electrode 14 via the second auxiliary electrode 16.

[0118] This fourth conductive portion 52 is exposed at a position on the temple portion 23 side when the edges are trimmed to create a cut-out piece that corresponds to the shape of the rim portion 21 so that the lens 30 obtained using the electrochromic sheet 150 (curved sheet 120) can be attached to the inside of the rim portion 21, as shown in Figure 1.

[0119] In this way, when the lens 30 is cut out by trimming its edges in order to fit it inside the rim portion 21, the third conductive portion 51 and the fourth conductive portion 52 are exposed at different positions, such as on the bridge portion 22 side and the temple portion 23 side, at the end portion along the thickness direction of the electrochromic sheet 150 (curved sheet 120), and these third conductive portion 51 and fourth conductive portion 52 are electrically connected to the first electrode 13 and the second electrode 14, respectively.

[0120] Therefore, when the trimmed lens 30 (cut piece) is attached to the inside of the rim portion 21, the third conductive portion 51 and the fourth conductive portion 52 respectively constitute connection terminals that are electrically connected via wiring to the switch 25 and the battery 26 provided in the temple portion 23.

[0121] The constituent material of the third conductive portion 51 and the fourth conductive portion 52 may be any conductive material, for example, the same materials as those listed as the constituent materials of the first conductive portion 17 and the second conductive portion 18 may be used.

[0122] Moreover, the third conductive portion 51 and the fourth conductive portion 52 are each independently set to an average thickness of preferably about 20 μm to about 100 μm, more preferably about 40 μm to about 80 μm. By setting the average thickness of the third conductive portion 51 and the fourth conductive portion 52 exposed at the end portion along the thickness direction of the electrochromic sheet 150 (curved sheet 120) in the trimmed lens 30 within this range, the third conductive portion 51 and the fourth conductive portion 52 can be easily used as connection terminals electrically connected to the switch 25 and the battery 26 via wiring.

[0123] <Third and fourth holes> It should be noted that due to the trimming process on the lens 30, the third hole portion 57 and the fourth hole portion 58 each have a portion of their wall portion (inner surface) missing, and in this specification, the term "hole portion" also refers to those portions having such missing portions.

[0124] Furthermore, in this embodiment, the third hole portion 57 and the fourth hole portion 58 are both through holes that penetrate the sealing portion 55 in the thickness direction, but are not limited to this. The third hole portion 57 may be formed from the first substrate 11 side toward the second substrate 12 side, with the sealing portion 55 remaining at its bottom, and the fourth hole portion 58 may be formed from the second substrate 12 side toward the first substrate 11 side, with the sealing portion 55 remaining at its top.

[0125] In addition, in this embodiment, the first hole portion 53 and the third hole portion 57, and the second hole portion 54 and the fourth hole portion 58 are each provided in the sealing portion 55 as different hole portions, i.e., as separate bodies, but this is not limited to this. For example, the first hole portion 53 and the third hole portion 57 may be configured as a single hole portion formed integrally without the sealing portion 55 being interposed, and the second hole portion 54 and the fourth hole portion 58 may be configured as a single hole portion formed integrally without the sealing portion 55 being interposed.

[0126] <1st auxiliary electrode, 2nd auxiliary electrode> The first auxiliary electrode 15 is provided as wiring by being laminated on the surface opposite to the first substrate 11 on the first electrode 13 extending from the colored region 70, and is electrically connected to the first conductive portion 17 formed in the first hole 53 and the third conductive portion 51 formed in the third hole 57. That is, the first auxiliary electrode 15 is formed between the first electrode 13 and the first conductive portion 17 and the third conductive portion 51 to electrically connect them to each other.

[0127] The second auxiliary electrode 16 is provided as wiring by being laminated on the surface opposite to the second substrate 12 on the second electrode 14 extending from the colored region 70, and is electrically connected to the second conductive portion 18 formed in the second hole portion 54 and the fourth conductive portion 52 formed in the fourth hole portion 58. In other words, the second auxiliary electrode 16 is formed between the second electrode 14 and the second conductive portion 18 and the fourth conductive portion 52 to electrically connect them to each other.

[0128] The resistance values ​​of the first auxiliary electrode 15 and the second auxiliary electrode 16 are set lower than the resistance values ​​of the first electrode 13 and the second electrode 14. Therefore, by forming wiring electrically connected to the electrochromic element 60 with the laminate of the first electrode 13 and the first auxiliary electrode 15, and the laminate of the second electrode 14 and the second auxiliary electrode 16, respectively, it is possible to impart superior conductivity to these wirings (laminates).

[0129] The constituent materials of the first auxiliary electrode 15 and the second auxiliary electrode 16 are not particularly limited as long as they have a lower resistance value than the first electrode 13 and the second electrode 14, respectively, but materials with excellent conductivity are used, such as silver, aluminum, copper, chromium, and molybdenum, and one or a combination of two or more of these can be used.

[0130] The first auxiliary electrode 15 and the second auxiliary electrode 16 each have an average thickness set to preferably about 1 nm or more and 100 nm or less, more preferably about 5 nm or more and 50 nm or less, so that the first auxiliary electrode 15 and the second auxiliary electrode 16 can reliably function as auxiliary electrodes.

[0131] The total thickness of the electrochromic sheet 150 having the above-mentioned configuration is not particularly limited, but is preferably 0.3 mm to 10.0 mm, and more preferably 0.5 mm to 5.0 mm. This provides excellent strength to the electrochromic sheet 150, while providing excellent thermoformability to the electrochromic sheet 150 when the electrochromic sheet 150 is molded into the curved sheet 120 having a curved shape.

[0132] The curved sheet 120 is formed by bonding the curved electrochromic sheet 150 to the outer surface of the resin layer 35, i.e., the curved convex surface 36, in a curved shape corresponding to the shape of the resin layer 35. By providing the lens 30 with this curved sheet 120, the sunglasses 100 is endowed with a function of reversibly coloring and decoloring at any timing by switching the application of voltage to the electrochromic element 60 of the electrochromic sheet 150. In this way, the curved sheet 120 is formed by making the electrochromic sheet 150 curved.

[0133] <Protective sheet> 8 and 10 show the cross-sectional structure of an electrochromic sheet 150 to which a protective sheet 50 (also called a protective film) is attached. Fig. 8 shows the electrochromic sheet 150 shown in Fig. 4 with protective sheets 50 (first protective sheet 50a, second protective sheet 50b) attached to both sides. Fig. 10 shows the electrochromic sheet 150 having a coating layer 19 with protective sheets 50 (second protective sheet 50b, third protective sheet 50c) attached to both sides.

[0134] The protective sheet 50 is provided to prevent the surface of the electrochromic sheet 150 from being damaged during transportation to a lens manufacturing process after the electrochromic sheet 150 is manufactured, or during transportation to a sales destination when the electrochromic sheet 150 is sold. Before the surface treatment process, a first protective sheet 50a is attached to at least the surface 11a of the first substrate 11, and immediately before the surface treatment, the first protective sheet 50a is removed, and the exposed surface 11a is subjected to the surface treatment. After the coating layer 19 is formed, a third protective sheet 50c is provided on the surface of the coating layer 19 as necessary. In the following, an example in which protective sheet 50 is provided not only on first substrate 11 and coating layer 19 but also on second substrate 12 will be described.

[0135] Specifically, a first protective sheet 50a is attached to the surface 11a of the first substrate 11, which constitutes one of the outermost layers of the electrochromic sheet 150. A second protective sheet 50b is attached to the surface (the lower surface in the figure) of the second substrate 12, which constitutes the other of the outermost layers of the electrochromic sheet 150. When there is no need to distinguish between the first protective sheet 50a and the second protective sheet 50b, they are referred to as "protective sheets 50." In addition, after the coating layer 19 is provided, a third protective sheet 50c is provided on the surface of the coating layer 19.

[0136] The protective sheet 50 is a so-called self-adhesive type sheet material, and has a sheet-like base material and an adhesive layer formed of an adhesive resin provided on one side of the base material. No adhesive material such as adhesive is provided other than the adhesive layer. The surface provided with the adhesive layer can be attached to and peeled off from the first substrate 11, the second substrate 12, and the coating layer 19 of the electrochromic sheet 150.

[0137] As the material for the adhesive layer (i.e., adhesive resin), various materials can be used as long as they have the desired adhesion and peeling properties. The material is selected from the viewpoints of (1) having a degree of adhesion that does not cause unintentional peeling and being able to be peeled off smoothly when peeling off the protective sheet 50, and (2) not leaving any residue that affects the surface treatment after peeling. Specifically, for example, polyolefin, polyethylene, and polypropylene can be suitably used. The first to third protective sheets 50a to 50c may be made of the same or different materials.

[0138] The thickness of the protective sheet 50 is not particularly limited, but may be, for example, 0.01 mm to 1.0 mm, preferably 0.02 mm to 0.8 mm, and more preferably 0.05 mm to 0.5 mm. The upper limit is set in consideration of, for example, punching or heat bending the electrochromic sheet 150 (the element-sealing connecting sheet 110 described below) to which the protective sheet 50 is attached into a desired shape. The lower limit is set from the viewpoint of exerting sufficient protective performance. The thicknesses of the first to third protective sheets 50a to 50c may be the same or different.

[0139] <Lens manufacturing method> In the sunglasses 100 (eyeglasses) configured as described above, the lenses 30 included in the sunglasses 100 are manufactured, for example, through a manufacturing method for the lenses 30 as described below.

[0140] Hereinafter, each step of the manufacturing method of the lens 30 including the curved sheet 120 obtained by curvedly forming the electrochromic sheet 150 of the present invention will be described in detail with reference to Fig. 2 and Fig. 12. Fig. 12 is a flowchart of the manufacturing method of the lens 30. The manufacturing method of the lens 30 includes a preparation step S10, a sheet singulation step S20, a sheet curving process step S30, a resin layer molding step S40, a coating process step S48, and a lens mounting step S50.

[0141] [Preparation process S10] The preparation step S10 includes a sheet preparation step, a surface treatment step, and a protective sheet arrangement step. Note that, although the following sheet singulation step S20 is described here as a separate step from the preparation step S10, the preparation step S10 may include the sheet singulation step S20.

[0142] Sheet preparation process S12: The sheet preparation step S12 is as follows. An element-sealing connecting sheet 110 is prepared, which has a first substrate 11, a second substrate 12, a sealing portion 55, and electrochromic elements 60, and in which a plurality of electrochromic elements 60 provided corresponding to colored regions 70 partitioned by the sealing portion 55 are sandwiched between the first substrate 11 and the second substrate 12. In this element-sealing connecting sheet 110, the plurality of electrochromic elements 60 are connected between the first substrate 11 and the second substrate 12 via the sealing portion 55, and are sealed by the first substrate 11, the second substrate 12, and the sealing portion 55.

[0143] Surface treatment step S14: The surface treatment step S14 is as follows. The surface 11a of the first substrate 11 is subjected to surface treatment such as UV (ultraviolet ray) treatment, ozone treatment, plasma treatment, alkali treatment, corona treatment, or the like, as described above.

[0144] Protective sheet placement step S16: The protective sheet placement step S16 is as follows. A first protective sheet 50a is attached to the surface 11a of the first substrate 11 that has been surface-treated in the surface treatment step, and a second protective sheet 50b is attached to the surface 12a of the second substrate 12. In this way, a connecting sheet laminate 210 is obtained in which protective sheets 50 (first protective sheet 50a, second protective sheet 50b) are attached to both sides of the element-sealing connecting sheet 110 (see FIG. 2(a)).

[0145] [Sheet singulation process S20] The sheet singulation step S20 (punching step) is as follows. 2(b), the connecting sheet laminate 210 prepared in the preparation step S10, that is, in a state in which the protective sheets 50 are attached to both sides of the element encapsulating connecting sheet 110, is punched out in the thickness direction of the element encapsulating connecting sheet 110 with a cutting blade 99 facing each electrochromic element 60, thereby obtaining an element laminate 250 of a predetermined shape in which the connecting sheet laminate 210 is singulated. That is, in a state in which the protective sheets 50 are attached to both sides, singulated electrochromic sheets 150 are obtained corresponding to each electrochromic element 60.

[0146] [Sheet curving process S30] The sheet bending process S30 is as follows. 2(c), the element stack 250 singulated in the sheet singulation step S20 is subjected to a thermal bending process under heating to form the element stack 250 into a curved element stack 220 having a curved shape with one surface side being a curved concave surface and the other surface side being a curved convex surface. This allows the flat electrochromic sheet 150 to be formed into a curved sheet 120 having a curved shape with the protective sheets 50 attached to both surfaces. Here, since the second substrate 12 is the resin laminated surface, the surface on the first substrate 11 (first protective sheet 50a) side is a curved convex surface.

[0147] This heat bending is usually carried out by press forming or vacuum forming. In this embodiment, as described below, the heating temperature (forming temperature) of the element stack 250 (electrochromic sheet 150) is set to about 110° C. or higher and 170° C. or lower, more preferably about 130° C. or higher and 160° C. or lower, taking into consideration the melting or softening temperatures of the first and second substrates 11, 12, in which the electrochromic sheet 150 includes the first and second substrates 11, 12. By setting the heating temperature within this range, it is possible to prevent the electrochromic sheet 150 from being altered or deteriorated, and to reliably heat-bend the electrochromic sheet 150 into the curved sheet 120 having a curved shape by bringing the electrochromic sheet 150 into a softened or molten state.

[0148] In addition, when there is no need to process the electrochromic sheet 150 into the curved sheet 120, that is, when the electrochromic sheet 150 is to be curved at the destination, the electrochromic sheet 150 is naturally provided to the destination in the form of a flat sheet.

[0149] [Resin layer molding process S40] The resin layer molding process S40 includes a protective sheet removing process S42, a sheet arrangement process S44, and an injection process S46. Fig. 11 is a diagram for explaining the molding of a resin layer 35 (optical element) by injecting a resin material into a mold 40 in the resin layer molding process S40 (injection process S46). Fig. 11(a) shows the state before injection, and Fig. 11(b) shows the state after injection.

[0150] Protective sheet removing process S42: First, the protective sheet 50 (first protective sheet 50a, second protective sheet 50b) is peeled off from the curved sheet 120 that has been thermally curved in the sheet bending process 30.

[0151] Sheet placement process S44: 2(d), the curved sheet 120 is placed inside the cavity 43 (see FIG. 11) of the mold 40 having a curved concave surface with a curved shape. Specifically, the curved concave surface 42a of the lower mold 42 of the mold 40 and the curved convex surface 121 of the curved sheet 120 (i.e., the first substrate 11) are brought into contact with each other.

[0152] Injection process (optical element molding process) S46: With the curved sheet 120 adsorbed to the lower die 42, the upper die 41 is attached, and a resin layer 35 (optical element) made primarily of a resin material is molded in a cavity 43, which is the space formed by the lower die 42 and the upper die 41, using, for example, an insert injection molding method.

[0153] A gate opening 44 (also simply referred to as a "gate") for introducing a resin material into the cavity 43 is provided in the upper mold 41 at a position that is not in contact with the electrochromic sheet 150. Specifically, when the electrochromic sheet 150 is placed on the curved concave surface 42a of the lower mold 42 of the mold 40, the gate opening 44 is provided at a position corresponding to the vicinity of the end (side surface) of the electrochromic sheet 150 in the left-right direction in the figure.

[0154] The curved concave surface 42a of the lower mold 42 of the mold 40 coincides with the curved surface of the surface (here, the first substrate 11) of the electrochromic sheet 150 that comes into contact with the cavity surface (here, the curved concave surface 42a). In addition, when the electrochromic sheet 150 is placed in the mold 40, the surface (the first substrate 11) that comes into contact with the curved concave surface 42a of the electrochromic sheet 150 and the side surface 93 are in contact with the inside of the cavity 43 (i.e., the curved concave surface 42a, the cavity side surface 42c).

[0155] The constituent material of the resin layer 35 (lens resin material 34) in a molten state is introduced into the cavity 43 from the gate opening 44, and is cooled and solidified while in contact with the curved concave surface of the curved sheet 120, thereby forming the resin layer 35 in a state of direct contact with the curved concave surface 122 of the curved sheet 120 without an adhesive layer or the like being interposed therebetween. In this way, the lens 30 including the thermally bent curved sheet 120 and the resin layer 35 is manufactured.

[0156] When the resin layer 35 is injection molded, the heating temperature (molding temperature) of the constituent material of the resin layer 35 to make it in a molten state is appropriately set according to the type of the constituent material of the resin layer 35, but when the constituent material of the resin layer 35 is the same or identical to the constituent material of the first substrate 11 provided in the curved sheet 120 described later, the heating temperature is preferably set to about 180° C. or more and 320° C. or less, more preferably about 230° C. or more and 300° C. or less. By setting the heating temperature within this range, the constituent material of the resin layer 35 in a molten state can be reliably supplied to the curved concave surface 122 of the curved sheet 120.

[0157] Among the insert injection molding methods, the injection compression molding method is preferably used. The injection compression molding method is preferably used because it involves injecting a resin material for forming the resin layer 35 into the mold 40 at low pressure, then closing the mold 40 at high pressure to apply a compressive force to the resin material, so that the resin layer 35 as a molded body and the lens 30 are less likely to suffer from molding distortion or optical anisotropy due to the local orientation of the resin molecules during molding. In addition, by controlling the mold compression force that is uniformly applied to the resin material, the resin material can be cooled at a constant specific volume, so that the resin layer 35 with high dimensional accuracy can be obtained.

[0158] [Coating process S48] Next, the surface 11a of the first substrate 11 of the curved sheet 120 of the lens 30 removed from the mold 40 is subjected to the above-mentioned coating process to provide a coating layer 19. Note that in this embodiment, the surface treatment step S14 is performed in the preparation step S10, but this is not limiting, and for example, the surface treatment may be performed on the surface 11a of the first substrate 11 of the lens 30 removed from the mold 40 immediately before the coating treatment step S48, that is, after the injection step S46 is completed.

[0159] [Lens mounting process S50] As shown in Fig. 5, the lens 30 provided with the coating layer 19 is trimmed by cutting its edge to produce a cut-out piece whose shape matches the shape of the inside of the rim portion 21. This lens 30 (cut-out piece) is then attached to the inside of the rim portion 21 to obtain the sunglasses 100 of Fig. 1.

[0160] <Second embodiment> Another embodiment of the lens manufacturing method will be described with reference to the flow chart of Fig. 13. The difference from the first embodiment is that the timing of the coating process is different. In the first embodiment, a coating process S48 is provided after the resin layer molding process S40. In this embodiment, a coating process S15 is provided in the preparation process S10.

[0161] Specifically, similarly to the first embodiment, an element-encapsulating connecting sheet 110 is prepared in a sheet preparation step S12, and a surface treatment step S14 is performed on the surface 11a of the first substrate 11 of the element-encapsulating connecting sheet 110. Next, a coating treatment step S15 is performed in which a coating layer 19 is provided on the surface 11a of the surface-treated first substrate 11. Then, as a protective sheet arrangement step S16, as shown in FIG. 10, a third protective sheet 50c is attached on the coating layer 19 on the first substrate 11 side, and a second protective sheet 50b is attached to the surface 12a of the second substrate 12 side.

[0162] Subsequently, a sheet singulation step S20, a sheet bending step S30, a resin layer molding step S40, and a lens mounting step S50 are performed. In this embodiment, the coating process step S15 has been described as being included in the preparation process S10, but it may be positioned as a process independent of the preparation process S10.

[0163] <Third embodiment> Another embodiment of the lens manufacturing method will be described with reference to the flow chart of Fig. 14. The difference from the first embodiment is that the timing of the coating process is different. In the first embodiment, a coating process S48 is provided after the resin layer molding process S40. In this embodiment, a coating process S26 is provided after the sheet singulation process S20.

[0164] Specifically, similarly to the first embodiment, in the preparation step S10, an element-sealing connecting sheet 110 having protective sheets 50 attached to both sides is obtained. At this time, the surface 11a of the first substrate 11 has been subjected to a surface treatment.

[0165] Next, in the sheet singulation step S20, a singulation step S22 is performed, and the element sealing connecting sheet 110 is punched into a predetermined shape in the thickness direction to obtain a singulated element stack 250. Then, a protective sheet removal step S24 is performed, and the first protective sheet 50a attached to the surface 11a of the first substrate 11 is peeled off to expose the surface 11a of the first substrate 11. In a coating treatment step S26, a coating treatment is performed on the exposed surface 11a, and a coating layer 19 is provided on the surface 11a of the first substrate 11. Furthermore, in a protective sheet arrangement step S28, a protective sheet 50 (third protective sheet 50c) is attached to the coating layer 19.

[0166] In the sheet bending process S30, the element stack 250 (electrochromic sheet 150) having a protective sheet 50 provided on the coating layer 19 obtained in the protective sheet placement process S28 is subjected to a thermal bending process under heat to obtain a curved element stack 220 having a curved shape in which the surface on the coating layer 19 side is a curved convex surface.

[0167] In the resin layer molding step S40, first, in a protective sheet removal step S42, the protective sheet 50 is peeled off from the curved element laminate 220 obtained in the sheet bending process step S30. Next, in a sheet arrangement step S44, the curved element laminate 220 having a curved shape is arranged on the curved concave surface 42a of the lower die 42 of the mold 40. At this time, the coating layer 19 presenting a curved convex surface abuts against the curved concave surface 42a. Next, in an injection step S46, the upper die 41 is attached, and a resin layer 35 (optical element) mainly made of a resin material is molded in a cavity 43, which is a space formed by the lower die 42 and the upper die 41. Thereby, a lens 30 having a coating layer 19 is obtained.

[0168] In the lens mounting step S50, the lens 30 having the coating layer 19 obtained in the resin layer molding step S40 is trimmed and attached to the rim portion 21, thereby obtaining the sunglasses 100. In the present embodiment, the coating process step S26 has been described as being included in the sheet singulation step S20, but it may be positioned as a step independent of the sheet singulation step S20.

[0169] <Fourth embodiment> Another embodiment of the lens manufacturing method will be described with reference to the flow chart of Fig. 15. The difference from the first embodiment is that the timing of the coating process is different. In the first embodiment, a coating process step S48 is provided after the resin layer molding process S40. In this embodiment, a coating process step S36 is provided after the sheet curving process step S30.

[0170] Specifically, similarly to the first embodiment, an element sealing connecting sheet 110 having protective sheets 50 attached to both sides is obtained in a preparation step S10. At this time, a surface treatment is applied to the front surface 11a of the first substrate 11. Next, in a sheet singulation step S20, the element sealing connecting sheet 110 is punched out in a predetermined shape in the thickness direction to obtain singulated element stacks 250.

[0171] In the sheet bending process S30, the element stack 250 (electrochromic sheet 150) provided with the protective sheet 50 is subjected to a thermal bending process under heat in a bending process S32 to obtain a curved element stack 220 having a curved shape in which the surface on the coating layer 19 side is a curved convex surface.

[0172] Next, a protective sheet removal step S34 is carried out, in which the first protective sheet 50a attached to the surface 11a of the first substrate 11 is peeled off to expose the surface 11a of the first substrate 11. In a coating treatment step S36, a coating treatment is applied to the exposed surface 11a to provide a coating layer 19 on the surface 11a of the first substrate 11. Furthermore, in a protective sheet arrangement step S38, a protective sheet 50 (third protective sheet 50c) is attached to the coating layer 19.

[0173] In the resin layer forming step S40, similarly to the third embodiment, the protective sheet removing step S42, the sheet arranging step S44, and the injection step S46 are performed to obtain the lens 30 having the coating layer 19.

[0174] In the lens mounting step S50, the lens 30 having the coating layer 19 obtained in the resin layer molding step S40 is trimmed and attached to the rim portion 21, thereby obtaining the sunglasses 100. In this embodiment, the coating process step S36 has been described as being included in the sheet bending process step S30, but it may be positioned as a process independent of the sheet bending process step S30.

[0175] <Fifth embodiment> Another embodiment of the lens manufacturing method will be described with reference to the flow chart of Fig. 16. In this embodiment, the surface treatment step S14 and the coating treatment step S26 in the third embodiment (see Fig. 14) are provided in the resin layer forming step S40. Specifically, in the resin layer forming step S40, after the protective sheet removing step S42, the sheet arranging step S44, and the injection step S46 are performed, the surface treatment step S47 and the coating treatment S48 are performed. After the coating treatment S48, the lens mounting step S50 is performed. In this embodiment, the surface treatment step S47 and the coating step S48 are described as being included in the resin layer forming step S40, but they may be positioned as steps independent of the resin layer forming step S40.

[0176] Sixth embodiment Another embodiment of the lens manufacturing method will be described with reference to the flow chart of FIG. In this embodiment, the surface treatment process and the coating process are each performed multiple times (here, twice). Specifically, in the preparation process S10, following the sheet preparation process S12, the surface treatment process S14 is performed and the protective sheet arrangement process S16 is performed, as in the fourth embodiment (see FIG. 15). In the sheet singulation process S20, after the singulation process S22 and the protective sheet removal process S24 are performed, the coating process S26 is performed and the protective sheet arrangement process S28 is performed. Next, the sheet bending process S30 is performed, and then, in the resin layer molding process S40, the protective sheet removal process S42, the sheet arrangement process S44, and the injection process S46 are performed, as in the fifth embodiment (see FIG. 16), and then the surface treatment process S47 and the coating process S48 are performed. After the coating process S48, the lens mounting process S50 is performed. The multiple coating and surface treatment steps may be performed once on each surface of lens 30, or multiple times on the same surface. Similarly, in the manufacturing methods of the first to third embodiments, a new step of providing coating layer 19 (surface treatment step S47 and coating step S48) may be added after injection step S46.

[0177] Although the present invention has been described based on the present embodiment, the present invention is not limited to this.

[0178] For example, each layer constituting the electrochromic element 60 of the electrochromic sheet 150 can be replaced with any layer having a similar function. In addition, the electrochromic sheet 150 may further include other layers, such as intermediate layers, between the first and second substrates 11, 12 and the electrochromic element 60. Although the electrochromic sheet 150 has been exemplified as the sheet member laminated on the lens 30, the present invention is not limited to this and can also be applied to, for example, a polarizing sheet for a polarizing lens. [Explanation of symbols]

[0179] 11 First board 12 Second board 13 1st electrode 14 2nd electrode 15 1st auxiliary electrode 16 2nd auxiliary electrode 17 First conductive part 18 Second conductive part 19 Coating layer 20 Frames 21 Rim 22 Bridge section 23 Temple Section 24 Nose pad section 25 Switch 26 Batteries 30 Lenses 34 Lens resin materials 35 Resin layer 40 Mold 41 Upper mold 42 Lower mold 42a Curved concave surface 42c Cavity side 43 Cavity 44 Gate Entrance (Gate) 50 Protective sheet (protective film) 50a First protective sheet 50b Second protective sheet 50c Third protective sheet 51 Third conductive part 52 Fourth conductive part 53 1st hole 54 2nd hole 55 Sealing part 57 3rd hole 58 4th hole 60 Electrochromic elements 63 First electrochromic layer 64 Second electrochromic layer 65 Electrolyte layer 70 colored areas 100 Sunglasses 110 Element sealing connection sheet 120 Curved Sheet 121 Curved convex surface 122 Curved concave surface 150 Electrochromic sheet (electronic light control sheet) 210 Connecting sheet laminate 220 Curved element stack 250 Element Stack

Claims

1. A method for manufacturing a lens with an electronic light control sheet, the lens comprising: an optical element; an electronic light control sheet having an EC functional layer, a first substrate provided on a front surface of the EC functional layer, and a second substrate provided on a back surface of the EC functional layer, the second substrate of the electronic light control sheet being bonded to a front surface of the optical element, the method comprising: A preparation step of preparing the electronic light control sheet; an injection molding process in which a first base material of the electronic light-adjusting sheet is disposed so as to contact the inside of a mold, and a resin material of the optical element is injected into a cavity of the mold to provide the optical element on the second base material of the electronic light-adjusting sheet; having The manufacturing method further includes a surface treatment step of performing a surface treatment on the surface of the first base material of the electronic light control sheet before or after the preparation step.

2. The manufacturing method according to claim 1 , wherein the surface treatment in the surface treatment step includes a UV treatment of irradiating ultraviolet light onto the surface of the first base material of the electronic light control sheet.

3. The UV treatment was carried out using a high-pressure mercury lamp with an integrated light quantity of 500 mJ / cm in the wavelength range of 320 to 390 nm. ２ The method according to claim 2, wherein the irradiation is performed so as to:

4. The manufacturing method according to claim 1 , further comprising a bending step of forming the electronic light control sheet into a predetermined shape prior to the injection molding step.

5. The surface of the first base material of the electronic light control sheet prepared before and after the preparation step is covered with a protective sheet, The manufacturing method according to claim 1 , wherein in the surface treatment step, the protective sheet is removed from the surface of the first substrate of the electronic light control sheet, and the surface treatment is performed on the exposed surface.

6. The manufacturing method according to claim 5 , wherein the protective sheet is a self-adhesive type sheet material having no adhesive member.

7. 4. The manufacturing method according to claim 1, further comprising a coating step of forming a coating layer on the surface of the first base material that has been subjected to the surface treatment by using any one of the following methods: sputtering, vacuum deposition, ion plating, chemical vapor deposition, spray coating, dipping coating, and flow coating.

8. The method according to any one of claims 1 to 3, wherein the surface of the first base material that has been subjected to the surface treatment has a surface roughness Ra of 5 to 50 µm.

9. The method according to any one of claims 1 to 3, wherein the surface of the first base material that has been subjected to the surface treatment has a water contact angle of 10 to 90 degrees.

10. A method for producing an electronic light control sheet having an EC functional layer, a first substrate provided on a front surface of the EC functional layer, and a second substrate provided on a back surface of the EC functional layer, the second substrate being bonded to a front surface of an optical element, the method comprising: A method for producing an electronic light controlling sheet, comprising a substrate surface treatment step of performing a surface treatment on the surface of the first substrate.

11. An electronic light control sheet having an EC functional layer, a first substrate provided on a front surface of the EC functional layer, and a second substrate provided on a back surface of the EC functional layer, the second substrate being bonded to a front surface of an optical element, An electronic light control sheet having a coating layer on a surface of the first substrate.

Images