JP7371744B1 - Electrochromic sheets, ophthalmic lenses and eyeglasses - Google Patents

Abstract

An object of the present invention is to provide an electrochromic sheet that does not impair aesthetic appearance and can suppress deterioration of auxiliary electrodes. An electrochromic sheet 150 includes a first substrate, a second substrate, an electrochromic element 60 forming a colored region 70, a sealing part, a first auxiliary electrode 15, and a second auxiliary electrode 16. , is provided. The first auxiliary electrode 15 has a first opposing electrode portion 15A extending along a part of the outer peripheral edge 70a of the colored region 70. The second auxiliary electrode 16 has a second opposing electrode portion 16A extending along another part of the outer peripheral edge 70a of the colored region 70. The second counter electrode section 16A faces the first counter electrode section 15A. In the sealing portion, the width of the sealing region 56, which is a region from the outer circumferential edge 70a of the colored region 70 to the outer circumferential edge 30a of the spectacle lens 30, is 1 mm or more and 3 mm or less. [Selection diagram] Figure 3

Description

TECHNICAL FIELD The present invention relates to an electrochromic sheet, a lens for spectacles, and spectacles.

Electrochromism is a phenomenon in which redox reactions occur when voltage is applied, resulting in a reversible color change. An electrochromic element is an element using an electrochromic material exhibiting electrochromism (see, for example, Patent Document 1).
An electrochromic element includes, for example, an electrochromic layer, a transparent electrode, and an auxiliary electrode. The electrochromic layer develops and discolors depending on voltage. A transparent electrode is electrically connected to the electrochromic layer. The auxiliary electrode is made of metal or the like. The auxiliary electrode is an opaque electrode that has lower electrical resistance than the transparent electrode.
An electrochromic sheet including an electrochromic element can be applied to eyewear such as sunglasses, for example.

JP2017-167317A

The auxiliary electrode is required to suppress deterioration due to oxidation and the like. Therefore, the electrochromic sheet is sometimes provided with a structure that protects the auxiliary electrode. However, it was not easy to protect the auxiliary electrode without damaging the aesthetic appearance of the electrochromic sheet.

An object of one aspect of the present invention is to provide an electrochromic sheet, a spectacle lens, and spectacles that can suppress deterioration of an auxiliary electrode without impairing the aesthetic appearance.

[1] An electrochromic sheet used for eyeglass lenses, comprising a first substrate, a second substrate disposed opposite to the first substrate, and between the first substrate and the second substrate. an electrochromic element that is provided and forms a colored area that changes color upon application of a voltage; an insulating sealing part that partitions the colored area; and a first auxiliary electrode that is electrically connected to the electrochromic element. and a second auxiliary electrode electrically connected to the electrochromic element, the electrochromic element comprising: a first transparent electrode electrically connected to the first auxiliary electrode; and a second auxiliary electrode electrically connected to the first auxiliary electrode. The first auxiliary electrode includes a second transparent electrode electrically connected to the electrode, and one or more electrochromic layers whose color changes due to at least one of an oxidation reaction and a reduction reaction. The second auxiliary electrode has a lower electrical resistance than the transparent electrode and has a first opposing electrode portion extending along a part of the outer periphery of the colored region, and the second auxiliary electrode has a lower electric resistance than the second transparent electrode. a second opposing electrode portion having a low electric resistance and extending along another part of the outer periphery of the colored region; The width of a sealing region that is located on the opposite side of the first counter electrode section, faces the first counter electrode section, and is a region of the sealing section from the outer periphery of the colored region to the outer periphery of the spectacle lens. is an electrochromic sheet having a thickness of 1 mm or more and 3 mm or less.

[2] The plurality of electrochromic layers include a first electrochromic layer electrically connected to the first transparent electrode and a second electrochromic layer electrically connected to the second transparent electrode. The electrochromic device further includes an electrolyte layer filled between the first electrochromic layer and the second electrochromic layer, and the first electrochromic layer changes color by an oxidation reaction. The electrochromic sheet according to [1], wherein the second electrochromic layer contains a material whose color changes due to a reduction reaction.

[3] In plan view, the distance between the first opposing electrode part and the second opposing electrode part and the outer peripheral edge of the colored area is 0.25 mm or more, and in plan view, the distance between the first opposing electrode part and the second opposing electrode part is 0.25 mm or more, and the electrochromic sheet according to [1] or [2], wherein the distance between the second opposing electrode part and the outer peripheral edge of the eyeglass lens is 0.25 mm or more.

[4] A spectacle lens comprising the electrochromic sheet according to any one of [1] to [3].

[5] Eyeglasses comprising the eyeglass lens according to [4].

According to one aspect of the present invention, it is possible to provide an electrochromic sheet, an eyeglass lens, and eyeglasses that can suppress deterioration of an auxiliary electrode without impairing aesthetic appearance.

It is a perspective view showing sunglasses using an electrochromic sheet of an embodiment. It is a figure explaining the manufacturing method of the lens using the electrochromic sheet of embodiment. FIG. 2 is a plan view showing an electrochromic sheet. 4 is a schematic diagram showing a cross section taken along line AA shown in FIG. 3. FIG. FIG. 2 is a schematic diagram showing a cross section of an electrochromic element. FIG. 2 is an exploded perspective view showing an electrochromic sheet. FIG. 2 is a plan view of a portion of an electrochromic sheet. FIG. 2 is a plan view of a portion of an electrochromic sheet.

Hereinafter, electrochromic sheets, spectacle lenses, and spectacles according to embodiments will be described in detail.

<Sunglasses>
FIG. 1 is a perspective view showing sunglasses using an electrochromic sheet according to an embodiment. When the sunglasses are worn on the user's head, the outer surface of the lens is the front surface. The surface opposite the front surface of the lens is the back surface. Sunglasses are an example of glasses.

As shown in FIG. 1, sunglasses 100 include a frame 20 and a pair of lenses 30 (lenses for spectacles). Note that in this specification, the term "lens (lens for spectacles)" includes both those that have a light condensing function and those that do not have a light condensing function. The lens 30 is also referred to as a transparent body.

The frame 20 includes a pair of rim portions 21, a bridge portion 22, a pair of temple portions 23, and a pair of nose pad portions 24. The frame 20 is attached to the user's head. The frame 20 places the lens 30 in front of the user's eyes.
The rim portion 21 is formed into a ring shape. The pair of rim portions 21 correspond to the user's right and left eyes, respectively.

The bridge portion 22 connects the pair of rim portions 21 to each other. The bridge portion 22 is located in front of the upper part of the user's nose when worn on the user's head.
The temple portion 23 is connected to the rim portion 21 at a position opposite to the position where the bridge portion 22 is connected. The temple portion 23 is hung over the user's ear when worn on the user's head.

The temple portion 23 includes a switch 25 and a battery 26. The switch 25 is exposed on the outer surface of the temple portion 23. The switch 25 is electrically connected to a connection terminal provided on the lens 30 via wiring. The switch 25 can apply a positive voltage, apply a negative voltage, and not apply a voltage to the electrochromic element 60, for example. The battery 26 is built into the temple portion 23. The battery 26 is electrically connected to a connection terminal provided on the lens 30 via wiring.

The nose pad portion 24 is formed at a position corresponding to the user's nose on each rim portion 21. The nose pad portion 24 contacts the user's nose. The nose pad portion 24 stabilizes the wearing state of the sunglasses 100.

As the constituent material of the frame 20, for example, a metal material, a resin material, etc. can be used. Note that the shape of the frame 20 is not limited to the illustrated example as long as it can be worn on the user's head.

Lenses 30 (lenses for spectacles) are attached to each rim portion 21, respectively. The lens 30 has light transmittance. The lens 30 has a plate shape with a curved convex shape projecting outward. The lens 30 is attached to the inside of the rim portion 21. The user can visually recognize external information through the lens 30. The lens 30 can be reversibly colored and decolored by switching the application of voltage to the electrochromic element 60 (see FIG. 4).

The lens 30 includes a curved sheet 120 and a resin layer 35 (see FIG. 2(D)). The lens 30 includes a pair of connection terminals. The pair of connection terminals are provided at positions corresponding to connecting portions where the bridge portion 22 and the temple portion 23 are connected to the rim portion 21, respectively.

The resin layer 35 has light transparency. The resin layer 35 is located on the back side of the lens 30 with respect to the curved sheet 120. The resin layer 35 may have a light condensing function. The resin layer 35 having a light condensing function provides the lens 30 with a light condensing function.
Examples of the constituent material of the resin layer 35 include curable resins such as thermoplastic resins, thermosetting resins, and photocurable resins. As the constituent material of the resin layer 35, one of these may be used, or two or more may be used in combination.

When the resin material constituting the resin layer 35 is the same kind or the same as the surface material of the curved sheet 120 (for example, the material of the first substrate 11), the adhesion between the resin layer 35 and the curved sheet 120 can be improved. .
If the material of the resin layer 35 and the surface material of the curved sheet 120 are the same or the same, the difference in refractive index between the resin layer 35 and the curved sheet 120 can be set low. Therefore, the light transmittance of the lens 30 can be increased. The refractive index difference between the resin layer 35 and the curved sheet 120 is preferably 0.2 or less, more preferably 0.1 or less.

The thickness of the resin layer 35 is preferably, for example, 1.5 mm or more and 20 mm or less. By setting the thickness of the resin layer 35 within the above range, it is possible to achieve both high strength and light weight of the lens 30.

The curved sheet 120 is an electrochromic sheet 150 having a curved shape. The curved sheet 120 is bonded to the outer surface (curved convex surface) of the resin layer 35. The curved sheet 120 has a curved shape along the outer surface (curved convex surface) of the resin layer 35 .

Since the sunglasses 100 includes the curved sheet 120, coloring and decoloring can be reversibly performed at any timing by switching the application of voltage to the electrochromic element 60 (see FIG. 4).
Sunglasses 100 have a frame 20, but the shape of the frame is not particularly limited. For example, a frame without a rim may be used. The glasses may have a frameless structure from the viewpoint of fashionability, lightness, etc.

In this embodiment, the lens 30 is applied to the sunglasses 100, but the application of the lens is not limited thereto. The lens may be applied to, for example, goggles.

<Lens manufacturing method>
FIGS. 2(A) to 2(D) are diagrams illustrating a method for manufacturing a lens using the electrochromic sheet of the embodiment.
[1] As shown in FIG. 2(A), an element sealing connection sheet 110 (electrochromic sheet 150) is prepared. The element sealing connection sheet 110 includes a first substrate 11, a second substrate 12, a sealing portion 55, and an electrochromic element 60 (see FIG. 4). A connecting sheet laminate 210 is obtained by attaching protective films 50 (or masking films) to both sides of the element sealing connecting sheet 110.

[2] As shown in FIG. 2(B), the connecting sheet laminate 210 is punched out in the thickness direction to obtain the element laminate 250 that is separated into circular pieces.

[3] As shown in FIG. 2C, the singulated element stack 250 is bent under heating to form the element stack 250 into a curved element stack 220. The element laminate 220 includes a curved sheet 120 (electrochromic sheet 150) and a protective film 50 attached to both surfaces of the curved sheet 120 (electrochromic sheet 150).

[4] Peel the protective film 50 from the curved sheet 120. As shown in FIG. 2(D), a resin layer 35 (molded layer) is formed on the curved concave surface of the curved sheet 120 by insert injection molding using a mold 40 or the like. Thereby, a lens 30 (lens for spectacles) including the curved sheet 120 and the resin layer 35 is obtained. The lens 30 is formed into a shape corresponding to the rim portion 21 by processing such as trimming and cutting (see FIG. 1). The lens 30 is attached to the rim portion 21.

<Electrochromic sheet>
FIG. 3 is a plan view showing the electrochromic sheet 150. FIG. 4 is a schematic diagram showing the AA cross section shown in FIG. 3. FIG. 5 is a schematic diagram showing a cross section of the electrochromic element 60.

As shown in FIG. 4, the electrochromic sheet 150 includes a first substrate 11, a second substrate 12, a sealing part 55, an electrochromic element 60, a first conductive part 17, and a second conductive part 18. , a first auxiliary electrode 15, and a second auxiliary electrode 16.

The first substrate 11 and the second substrate 12 are the outermost layers of the electrochromic sheet 150. The second substrate 12 is placed facing the first substrate 11. The first substrate 11 and the second substrate 12 have a function as a protective layer that protects the electrochromic element 60 and the like. The first substrate 11 and the second substrate 12 have transparency. The first substrate 11 and the second substrate 12 contain, for example, a thermoplastic transparent resin (base resin) as a main material.

Examples of the transparent resin constituting the first substrate 11 and the second substrate 12 include acrylic resin, polystyrene resin, polyethylene resin, polypropylene resin, polyester resin (polyethylene terephthalate (PET), polyethylene naphthalate (PEN), ), polycarbonate resins, polyamide resins, cycloolefin resins, vinyl chloride resins, polyacetal resins, triacetyl cellulose (TAC), and the like. As the transparent resin, one of these may be used, or two or more may be used in combination. As the transparent resin, polycarbonate resin or polyamide resin is preferable.

Polycarbonate resin has high transparency (translucency), mechanical strength (rigidity, etc.), and heat resistance, so it improves the transparency, impact resistance, and heat resistance of the first substrate 11 and the second substrate 12. can be done. As the polycarbonate resin, aromatic polycarbonate resin is preferable. Aromatic polycarbonate resin has an aromatic ring in its main chain. By using aromatic polycarbonate resin, the first substrate 11 and the second substrate 12 having excellent strength can be obtained.

Aromatic polycarbonate resins are synthesized, for example, by interfacial polycondensation reaction between bisphenol and phosgene, transesterification reaction between bisphenol and diphenyl carbonate, and the like. Examples of bisphenol include bisphenol (modified bisphenol), bisphenol A, which is the origin of the repeating unit of polycarbonate shown in formula (1A), and the like.

（式（１Ａ）中、Ｘは、炭素数１～１８のアルキル基、芳香族基または環状脂肪族基である。ＲａおよびＲｂは、それぞれ独立して、炭素数１～１２のアルキル基である。ｍおよびｎは、それぞれ０～４の整数である。ｐは、繰り返し単位の数である。）

(In formula (1A), X is an alkyl group having 1 to 18 carbon atoms, an aromatic group, or a cycloaliphatic group. Ra and Rb are each independently an alkyl group having 1 to 12 carbon atoms. . m and n are each integers from 0 to 4. p is the number of repeating units.)

The bisphenol that is the origin of the repeating unit of the polycarbonate shown in formula (1A) includes, for example, 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, 2,2'-bis(4-hydroxy- Examples include 3-methylphenyl)propane. As the bisphenol, one of these may be used, or two or more may be used in combination.

The polycarbonate resin preferably has a bisphenol type polycarbonate resin having a skeleton derived from bisphenol as a main component. By using bisphenol type polycarbonate resin, the first substrate 11 and the second substrate 12 exhibit excellent strength.

The first substrate 11 and the second substrate 12 may be colorless or colored. The colors of the first substrate 11 and the second substrate 12 are not particularly limited, and may be red, blue, yellow, or the like.
The colors of the first substrate 11 and the second substrate 12 can be selected by including dyes or pigments in the first substrate 11 and the second substrate 12. Examples of the dye include acid dyes, direct dyes, reactive dyes, and basic dyes. As the dye, one of these may be used, or two or more may be used in combination.

The first substrate 11 and the second substrate 12 may contain additives such as antioxidants, fillers, plasticizers, light stabilizers, ultraviolet absorbers, heat ray absorbers, and flame retardants, as necessary. The first substrate 11 and the second substrate 12 may be stretched or non-stretched.

The refractive index of the first substrate 11 and the second substrate 12 at a wavelength of 589 nm is preferably 1.3 or more and 1.8 or less, more preferably 1.4 or more and 1.65 or less. By setting the refractive index of the first substrate 11 and the second substrate 12 within this range, the function of the electrochromic element 60 can be enhanced.
The average thickness of the first substrate 11 and the second substrate 12 is, for example, 0.05 mm or more and 10.0 mm or less, preferably 0.3 mm or more and 5.0 mm or less.

The electrochromic element 60 is a light emitting element that can be switched between coloring (coloring) and decoloring at any timing by turning the switch 25 (see FIG. 1) ON/OFF. The electrochromic element 60 (specifically, the main portion 61) forms a colored region 70 partitioned by the sealing portion 55. Electrochromic element 60 is provided between first substrate 11 and second substrate 12.

As shown in FIG. 5, the electrochromic element 60 includes a first transparent electrode 13, a first electrochromic layer 63, an electrolyte layer 65, a second electrochromic layer 64, and a second transparent electrode 14. ing.
The first electrochromic layer 63 , the electrolyte layer 65 , and the second electrochromic layer 64 constitute the main portion 61 . The main portion 61 forms a colored region 70 . The color of the colored region 70 changes due to the application of voltage.

The first transparent electrode 13 is laminated on the inner surface of the first substrate 11. The second transparent electrode 14 is laminated on the inner surface of the second substrate 12.
The first transparent electrode 13 and the second transparent electrode 14 respectively supply electrons or It is an electrode that receives

The first transparent electrode 13 and the second transparent electrode 14 have transparency. The constituent material of the first transparent electrode 13 and the second transparent electrode 14 is a conductive material. The constituent materials of the first transparent electrode 13 and the second transparent electrode 14 include, for example, ITO (Indium Tin Oxide), FTO (F-doped Tin Oxide), ATO (Antimony Tin Oxide), IZO (Indium Zinc Oxide), and In ₂ Examples include oxides such as O ₃ , SnO ₂ , Sb-containing SnO ₂ , and Al-containing ZnO. As the constituent materials of the first transparent electrode 13 and the second transparent electrode 14, one of these may be used, or two or more may be used in combination.

The thickness of the first transparent electrode 13 and the second transparent electrode 14 is determined so as to obtain the electrical resistance value necessary for the redox reaction of the electrochromic layers 63 and 64. When ITO is used as the constituent material of the first transparent electrode 13 and the second transparent electrode 14, the average thickness of the first transparent electrode 13 and the second transparent electrode 14 is, for example, independently 50 nm or more and 200 nm or less, The thickness is preferably 50 nm or more and 150 nm or less, more preferably 60 nm or more and 130 nm or less.

The first electrochromic layer 63 (electrochromic layer) is a layer that changes color. The first electrochromic layer 63 mainly contains a material that is colored by an oxidation reaction. Examples of materials that are colored by oxidation reactions include polymers of radically polymerizable compounds having a triarylamine structure, bis-acridan compounds, triphenylamine, benzidine, Prussian blue type complexes, and nickel oxide. As the material colored by oxidation reaction, one of these may be used, or two or more may be used in combination.

Examples of polymers of radically polymerizable compounds having a triarylamine structure include those described in JP-A-2016-45464, JP-A-2020-138925, and the like.
Examples of the Prussian blue complex include Fe(III) ₄ [Fe(II)(CN) ₆ ] ₃ .

Among these, polymers of radically polymerizable compounds having a triarylamine structure are preferred. By using this polymer, an electrochromic element that can be operated at a constant voltage, has excellent repeat durability, and has high contrast can be obtained.
Note that the polymer of the radically polymerizable compound having a triarylamine structure may contain another radically polymerizable compound different from the radically polymerizable compound having a triarylamine structure. The radically polymerizable compound having a triarylamine structure and other radically polymerizable compounds may be crosslinked.

The average thickness of the first electrochromic layer 63 is preferably 0.1 μm or more and 30 μm or less, more preferably 0.4 μm or more and 10 μm or less.

The second electrochromic layer 64 (electrochromic layer) is a layer that changes color. The second electrochromic layer 64 mainly contains a material that is colored by a reduction reaction. As the material that is colored by a reduction reaction, it is preferable to use a material that has the same color tone as the first electrochromic layer 63. As a result, the maximum color density can be increased, so that the contrast can be improved. As the material that is colored by a reduction reaction, a material having a different color tone from that of the first electrochromic layer 63 may be used. In this case, color mixing becomes possible.

By coloring both of the two electrochromic layers 63 and 64, the redox dyes in the electrochromic layers 63 and 64 can be colored at the same time. Therefore, color development speed can be improved. By coloring both the electrochromic layers 63 and 64, the driving voltage of the electrochromic element 60 can be suppressed. Therefore, the repeat durability of the electrochromic element 60 can be improved.

Examples of materials that are colored by a reduction reaction include inorganic electrochromic compounds, organic electrochromic compounds, and conductive polymers. As the material that is colored by a reduction reaction, one of these may be used, or two or more may be used in combination.

Examples of the inorganic electrochromic compound include tungsten oxide, molybdenum oxide, iridium oxide, and titanium oxide. Among them, tungsten oxide is preferred. Tungsten oxide has a low reduction potential and therefore a low coloring and fading potential. Tungsten oxide is an inorganic material and has excellent durability.

Examples of organic electrochromic compounds include azobenzene-based, anthraquinone-based, diarylethene-based, dihydroprene-based, dipyridine-based, styryl-based, styrylspiropyran-based, spirooxazine-based, spirothiopyran-based, thioindigo-based, tetrathiafulvalene-based, and terephthalic acid-based. , triphenylmethane type, triphenylamine type, naphthopyran type, viologen type, pyrazoline type, phenazine type, phenylenediamine type, phenoxazine type, phenothiazine type, phthalocyanine type, fluoran type, fulgide type, benzopyran type, metallocene type, etc. Examples include low-molecular organic electrochromic compounds. Among these, viologen compounds and dipyridine compounds are preferred. Viologen-based compounds and dipyridine-based compounds have low color developing/fading potentials and exhibit good color values.

Examples of the viologen compounds include compounds described in Japanese Patent No. 3955641, Japanese Patent Application Laid-open No. 2007-171781, and the like. Examples of dipyridine compounds include compounds described in JP-A No. 2007-171781, JP-A No. 2008-116718, and the like.

Examples of the conductive polymer include polypyrrole, polythiophene, polyaniline, and derivatives thereof.

The average thickness of the second electrochromic layer 64 is preferably 0.2 μm or more and 5.0 μm or less, more preferably 1.0 μm or more and 4.0 μm or less. When the average thickness of the second electrochromic layer 64 is 0.2 μm or more, the color density can be increased. When the average thickness of the second electrochromic layer 64 is 5.0 μm or less, manufacturing costs can be suppressed. When the average thickness of the second electrochromic layer 64 is 5.0 μm or less, visibility is unlikely to deteriorate due to coloring.

The electrolyte layer 65 is filled between the first electrochromic layer 63 and the second electrochromic layer 64. The electrolyte layer 65 contains an electrolyte having ionic conductivity.

Examples of the electrolyte include inorganic ion salts such as alkali metal salts and alkaline earth metal salts; supporting salts such as quaternary ammonium salts, acids, and alkalis. Counter ions (anions) of the electrolyte include halogen, thiocyanate ion ( ^SCN- ), chlorate ion (ClO ₃ ^- ), perchlorate ion (ClO ₄ ^- ), tetrafluoroborate ion (BF ₄ ^- ), Hexafluorophosphate ion (PF ₆ ⁻ ), trifluoromethanesulfonate ion (CF ₃ SO ₃ ⁻ ), trifluoroacetate ion (CF ₃ COO ⁻ ), bisfluorosulfoniumimide (N(SO ₂ F) ₂ ⁻ ) can be mentioned.

Specifically, such electrolytes include LiClO ₄ , LiBF ₄ , LiAsF ₆ , LiPF ₆ , LiCF ₃ SO ₃ , LiCF ₃ COO, KCl, NaClO ₃ , NaCl, NaBF ₄ , NaSCN, KBF ₄ , Mg(ClO ₄ ) ₂ , Mg( _BF4 ) ₂ , and the like. As the electrolyte, one of these may be used, or two or more may be used in combination.

An ionic liquid can also be used as the material for the electrolyte. Among ionic liquids, organic ionic liquids are easy to handle because they have a molecular structure that remains liquid in a wide temperature range including room temperature.

Examples of the cationic component of the organic ionic liquid include imidazole derivatives such as N,N-dimethylimidazole salt, N,N-methylethylimidazole salt, and N,N-methylpropylimidazole salt; N,N-dimethylpyridinium salt. , N,N-methylpropylpyridinium salts and other pyridinium derivatives; and aliphatic quaternary ammonium salts such as trimethylpropylammonium salts, trimethylhexylammonium salts, and triethylhexylammonium salts. As the anion component, it is preferable to use a compound containing fluorine in consideration of stability in the atmosphere. Examples of the anion component include BF ₄ ^- , CF ₃ SO ₃ ^- , PF ₄ ^- , (CF ₃ SO ₂ ) ₂ N ^-, and the like.

The material for the electrolyte is preferably an ionic liquid that is a combination of a cation component and an anion component.

The ionic liquid may be dissolved directly in any of the photopolymerizable monomers, oligomers, and liquid crystal materials. If the ionic liquid has low solubility in these materials, it is possible to mix a solution prepared by dissolving the ionic liquid in a small amount of solvent with the photopolymerizable monomer, oligomer, or liquid crystal material. can.

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, Examples include alcohols and mixed solvents thereof.

The electrolyte may be a low viscosity liquid. The electrolyte may be in various forms, such as a gel type, a polymer crosslinked type, and a liquid crystal dispersed type. Preferably, the electrolyte is formed in a gel or solid form. Thereby, it is possible to improve the element strength and reliability of the electrochromic element 60.

A preferable method for making the electrolyte layer 65 into a solid state is, for example, a method in which a liquid containing an electrolyte and a solvent is held in a resin. Thereby, both high ionic conductivity and solid strength of the electrolyte layer 65 can be obtained. As the resin, for example, a photocurable resin is preferable. Thereby, the solid electrolyte layer 65 can be obtained at a lower temperature and in a shorter time than when the solid electrolyte layer 65 is obtained by thermal polymerization or solvent vaporization.

The average thickness of the electrolyte layer 65 is preferably 20 μm or more and 100 μm or less, more preferably 30 μm or more and 80 μm or less, and even more preferably 30 μm or more and 70 μm or less.

Note that an intermediate layer such as an insulating porous layer or a protective layer may be provided between each layer between the first transparent electrode 13 and the second transparent electrode 14, for example.

As shown in FIG. 4, the sealing part 55 is arranged between the first substrate 11 and the second substrate 12, and defines the colored region 70. The sealing portion 55 has insulation properties. The sealing portion 55 surrounds the colored region 70 in a plan view.

The constituent material of the 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; silicon oxide (SiO ₂ ), silicon oxynitride (SiON ), inorganic oxides such as aluminum oxide (Al ₂ O ₃ ), and the like.

The thickness of the sealing part 55 is determined according to the thickness of the electrochromic element 60. The average thickness of the sealing portion 55 is preferably 20 μm or more and 100 μm or less, more preferably 30 μm or more and 80 μm or less, and more preferably 40 μm or more and 60 μm or less.

The first conductive portion 17 is formed in the sealing portion 55 from the first substrate 11 side toward the second substrate 12 . The first conductive part 17 is located at a position overlapping the first extraction part 15B (see FIG. 6) of the first auxiliary electrode 15, and penetrates the sealing part 55 in the thickness direction. The first conductive portion 17 is electrically connected to the first transparent electrode 13 via the first auxiliary electrode 15 . The first conductive portion 17 is electrically connected to the first transparent electrode 13 at one of the bridge portion 22 side and the temple portion 23 side, for example.

The second conductive portion 18 is formed in the sealing portion 55 from the second substrate 12 side toward the first substrate 11 . The second conductive portion 18 is provided on the opposite side of the colored region 70 from the first conductive portion 17 . The second conductive portion 18 is located at a position overlapping the second extraction portion 16B (see FIG. 6) of the second auxiliary electrode 16, and penetrates the sealing portion 55 in the thickness direction. The second conductive part 18 is electrically connected to the second transparent electrode 14 via the second auxiliary electrode 16. The second conductive part 18 is electrically connected to the second transparent electrode 14, for example, at the other of the bridge part 22 side and the temple part 23 side.

In this way, the first conductive part 17 is electrically connected to the first transparent electrode 13 at one of the bridge part 22 side and the temple part 23 side. The second conductive portion 18 is electrically connected to the second transparent electrode 14 at the other of the bridge portion 22 side and the temple portion 23 side. Therefore, a voltage can be applied between the first transparent electrode 13 and the second transparent electrode 14 via the first conductive part 17 and the second conductive part 18. The first conductive part 17 and the second conductive part 18 function as connection terminals when applying a voltage between the first transparent electrode 13 and the second transparent electrode 14. By applying a voltage between the first transparent electrode 13 and the second transparent electrode 14, the colored region 70 is colored or decolored.

After step [3] or after step [4], a voltage is applied between the first transparent electrode 13 and the second transparent electrode 14 via the first conductive part 17 and the second conductive part 18. This allows the electrochromic device 60 to be tested easily.

Examples of the constituent material of the first conductive part 17 and the second conductive part 18 include conductive paste such as silver paste. The constituent material of the first conductive part 17 and the second conductive part 18 may be a material containing metal such as gold, copper, or an alloy thereof.

The average thickness of the first conductive part 17 and the second conductive part 18 is preferably 20 μm or more and 100 μm or less, and more preferably 40 μm or more and 80 μm or less, each independently.

FIG. 6 is an exploded perspective view showing the electrochromic sheet 150. FIG. 7 is a plan view of a portion of the electrochromic sheet 150. FIG. 7 is an enlarged view of region R1 in FIG. FIG. 8 is a plan view of a portion of the electrochromic sheet 150. FIG. 8 is an enlarged view of region R2 in FIG. 3.

In the following description, an XYZ orthogonal coordinate system will be adopted. As shown in FIG. 6, the X direction is a direction that connects the first extraction section 15B and the second extraction section 16B in a plane along the surface of the first substrate 11. The Y direction is perpendicular to the X direction in a plane along the surface of the first substrate 11 . The Z direction is perpendicular to both the X and Y directions. Planar viewing means viewing parallel to the Z direction. One of the X directions is referred to as the "+X direction." The direction opposite to the +X direction is called the "-X direction." One of the Y directions is referred to as the "+Y direction." The direction opposite to the +Y direction is called the "-Y direction."

In FIG. 6, the first transparent electrode 13 and the second transparent electrode 14 are shown as shapes in the lens 30.
The first transparent electrode 13 includes, for example, a first main body portion 13A and a first protrusion portion 13B. The first main body portion 13A has, for example, a shape corresponding to the lens 30 (see FIG. 1) in plan view. The first main body portion 13A may have, for example, a circular shape, an elliptical shape, etc. in plan view. The first protruding portion 13B protrudes in the −X direction (direction away from the colored region 70) from a portion of the outer peripheral edge of the first main body portion 13A on the −X direction side. The first protruding portion 13B is formed at a position corresponding to a connecting portion (a portion where the bridge portion 22 or the temple portion 23 is connected to the rim portion 21).

The second transparent electrode 14 includes, for example, a second main body portion 14A and a second protrusion portion 14B. The second main body portion 14A has, for example, a shape corresponding to the lens 30 (see FIG. 1) in plan view. The second main body portion 14A may have, for example, a circular shape, an elliptical shape, etc. in plan view. The second protruding portion 14B protrudes in the +X direction (direction away from the colored region 70) from a portion of the outer peripheral edge of the second main body portion 14A on the +X direction side. The second protruding portion 14B is formed at a position corresponding to a connecting portion (a portion where the bridge portion 22 or the temple portion 23 is connected to the rim portion 21).

The first auxiliary electrode 15 includes a first opposing electrode section 15A and a first extraction section 15B. The first counter electrode section 15A extends along a part of the outer peripheral edge 70a of the colored region 70. Specifically, the first counter electrode portion 15A extends along the portion of the outer peripheral edge 70a of the colored region 70 on the -X direction side. The first counter electrode section 15A is formed apart from the outer peripheral edge 70a of the colored region 70.

The first auxiliary electrode 15 is provided in a layered manner on the first transparent electrode 13. The first auxiliary electrode 15 is electrically connected to the first transparent electrode 13. Therefore, the first auxiliary electrode 15 is electrically connected to the electrochromic element 60. The first auxiliary electrode 15 is electrically connected to the first conductive part 17. The first auxiliary electrode 15 electrically connects the first transparent electrode 13 and the first conductive part 17 (see FIG. 4).

The electrical resistance value of the first auxiliary electrode 15 is lower than the electrical resistance value of the first transparent electrode 13. That is, the first auxiliary electrode 15 has a lower electrical resistance than the first transparent electrode 13. Therefore, high electrical conductivity can be imparted to the laminate of the first transparent electrode 13 and the first auxiliary electrode 15. The laminate of the first transparent electrode 13 and the first auxiliary electrode 15 functions as a low electrical resistance wiring electrically connected to the electrochromic element 60 (see FIG. 4).

As shown in FIG. 3, the first opposing electrode section 15A includes a first extending section 1 and a second extending section 2. As shown in FIG.
The first extending portion 1 extends from an intermediate position in the length direction of the first opposing electrode portion 15A (a position where the first extraction portion 15B is formed) (first base) to an outer peripheral edge 70a of the colored region 70. This is a linear portion extending along the line to one side (clockwise direction in FIG. 3). The first extending portion 1 approaches the second opposing electrode portion 16A (specifically, the third extending portion 3) while moving in the +Y direction (upward in FIG. 3). The first extending portion 1 is curved so that the inclination angle (inclination angle with respect to the X direction) gradually decreases toward the tip.

The length of the first extending portion 1 can be, for example, 5 mm or more and 20 mm or less. When the length of the first extension portion 1 is within this range, voltage can be evenly applied to a wide range of the colored region 70.

As shown in FIG. 7, in plan view, the width W1 of the portion 1A (tip portion 1A) including at least the tip 1a (one end) of the first extension portion 1 is, for example, 0.1 mm or more and 1.0 mm or less. It's good. Since the width W1 of the tip portion 1A is 0.1 mm or more, the electrical resistance can be reduced. Therefore, coloring and decoloring in the colored region 70 can be performed without delay. Since the width W1 of the tip portion 1A is 1.0 mm or less, it is difficult to visually recognize it from the outside. Therefore, the first extending portion 1 is less noticeable. Therefore, the aesthetic appearance of the sunglasses 100 can be enhanced. The width W1 may be 0.3 mm or more and 1.0 mm or less. The width W1 is preferably 0.3 mm or more and 0.7 mm or less.

In this embodiment, the tip portion 1A of the first extension portion 1 is a length portion having a constant width (width W1).
The distal end portion of the first extending portion 1 is not limited to a shape having a constant width, but may have a shape whose width gradually becomes narrower toward the distal end. In that case, the width of the tip portion may be the average width of a predetermined length range (for example, a length range of 5 mm from the tip). The width of the tip portion may be the width at the tip.

In plan view, the distance W2 between the first opposing electrode portion 15A (for example, the first extension portion 1 and the second extension portion 2) and the outer peripheral edge 70a of the colored region 70 may be 0.25 mm or more. preferable. When the distance W2 is 0.25 mm or more, the first opposing electrode portion 15A is located sufficiently away from the colored region 70. Therefore, the influence from the colored region 70 can be suppressed, and deterioration of the first counter electrode section 15A can be suppressed. When the distance W2 is 0.25 mm or more, external influences on the colored region 70 can be reduced. Therefore, the characteristics of the colored region 70 can be improved. The distance W2 is preferably 0.5 mm or more. The distance W2 may be, for example, 2 mm or less.

As shown in FIG. 3, the second extending portion 2 is colored starting from an intermediate position in the length direction of the first opposing electrode portion 15A (the position where the first extraction portion 15B is formed) (first base portion). This is a linear portion extending along the outer peripheral edge 70a of the region 70 to the other side (leftward direction in FIG. 3). The second extending portion 2 extends in the −Y direction (downward in FIG. 3) while approaching the second opposing electrode portion 16A (specifically, the fourth extending portion 4). The second extending portion 2 is curved so that the inclination angle (inclination angle with respect to the X direction) gradually decreases toward the tip.

In plan view, the width of a portion (tip portion) including at least the tip (one end) of the second extending portion 2 may be, for example, 0.1 mm or more and 1.0 mm or less. Since the width of the tip portion is 0.1 mm or more, electrical resistance can be reduced. Therefore, coloring and decoloring in the colored region 70 can be performed without delay. Since the width of the tip portion is 1.0 mm or less, it is difficult to visually recognize it from the outside. Therefore, the second extending portion 2 is less noticeable. Therefore, the aesthetic appearance of the sunglasses 100 can be enhanced. The width of the tip portion may be 0.3 mm or more and 1.0 mm or less.

In this embodiment, the tip portion of the second extension portion 2 is a length portion having a constant width.
The tip portion of the second extending portion 2 is not limited to a shape having a constant width, but may have a shape whose width gradually becomes narrower toward the tip. In that case, the width of the tip portion may be the average width of a predetermined length range (for example, a length range of 5 mm from the tip). The width of the tip portion may be the width at the tip.

The second extending portion 2 may be longer than the first extending portion 1, or may have the same length as the first extending portion 1. The dimension of the second extending portion 2 in the Y direction may be larger than the dimension of the first extending portion 1 in the Y direction.

Since the first counter electrode section 15A includes the first extension section 1 and the second extension section 2, it is possible to apply a voltage evenly to a wide range of the colored region 70. Therefore, sufficient coloring (coloring) and decoloring can be achieved in a wide range of the colored region 70.

As shown in FIG. 6, the first extraction portion 15B protrudes from a part of the outer peripheral edge of the first counter electrode portion 15A in the −X direction (direction away from the colored region 70). The first extraction portion 15B is formed, for example, at a position overlapping the first protrusion 13B of the first transparent electrode 13. The first extraction portion 15B is formed at a position corresponding to a connecting portion (a portion where the bridge portion 22 or the temple portion 23 is connected to the rim portion 21).

The second auxiliary electrode 16 includes a second opposing electrode section 16A and a second extraction section 16B. The second counter electrode section 16A is arranged along another part of the outer periphery 70a of the colored region 70 (a part of the outer periphery 70a of the colored region 70 that is different from the part where the first counter electrode section 15A is formed). extend. Specifically, the second opposing electrode section 16A extends along the +X direction side portion of the outer peripheral edge 70a of the colored region 70. The second counter electrode portion 16A is formed apart from the outer peripheral edge 70a of the colored region 70.

The second counter electrode section 16A is located on the opposite side of the colored region 70 from the first counter electrode section 15A. The second counter electrode section 16A is located opposite the first counter electrode section 15A in the X direction.

The second auxiliary electrode 16 is provided in a layered manner on the second transparent electrode 14 . The second auxiliary electrode 16 is electrically connected to the second transparent electrode 14. Therefore, the second auxiliary electrode 16 is electrically connected to the electrochromic element 60. The second auxiliary electrode 16 is electrically connected to the second conductive part 18. The second auxiliary electrode 16 electrically connects the second transparent electrode 14 and the second conductive portion 18 (see FIG. 4).

The electrical resistance value of the second auxiliary electrode 16 is lower than the electrical resistance value of the second transparent electrode 14. That is, the second auxiliary electrode 16 has a lower electrical resistance than the second transparent electrode 14. Therefore, high electrical conductivity can be imparted to the laminate of the second transparent electrode 14 and the second auxiliary electrode 16. The laminate of the second transparent electrode 14 and the second auxiliary electrode 16 functions as a low electrical resistance wiring electrically connected to the electrochromic element 60 (see FIG. 4).

As shown in FIG. 3, the second opposing electrode section 16A includes a third extending section 3 and a fourth extending section 4. As shown in FIG.
The third extending portion 3 extends from an intermediate position in the length direction of the second opposing electrode portion 16A (a position where the second extraction portion 16B is formed) (second base) to an outer peripheral edge 70a of the colored region 70. This is a linear portion that extends along the line to one side (to the left in FIG. 3). The third extending portion 3 approaches the first opposing electrode portion 15A (specifically, the first extending portion 1) while moving in the +Y direction (upward in FIG. 3). The third extending portion 3 is curved so that the inclination angle (inclination angle with respect to the X direction) gradually decreases toward the tip.

The length of the third extending portion 3 can be, for example, 5 mm or more and 20 mm or less. When the length of the third extending portion 3 is within this range, voltage can be evenly applied to a wide range of the colored region 70.

As shown in FIG. 8, in plan view, the width W3 of the portion 3A (tip portion 3A) including at least the tip 3a (one end) of the third extending portion 3 is, for example, 0.1 mm or more and 1.0 mm or less. It's good. Since the width W3 of the tip portion 3A is 0.1 mm or more, the electrical resistance can be reduced. Therefore, coloring and decoloring in the colored region 70 can be performed without delay. Since the width W3 of the tip portion 3A is 1.0 mm or less, it is difficult to visually recognize it from the outside. Therefore, the third extending portion 3 is less noticeable. Therefore, the aesthetic appearance of the sunglasses 100 can be enhanced. The width W3 may be 0.3 mm or more and 1.0 mm or less. The width W3 is preferably 0.3 mm or more and 0.7 mm or less.

In this embodiment, the tip portion 3A of the third extension portion 3 is a length portion having a constant width (width W3).
The tip portion of the third extending portion 3 is not limited to a shape having a constant width, but may have a shape whose width gradually becomes narrower toward the tip. In that case, the width of the tip portion may be the average width of a predetermined length range (for example, a length range of 5 mm from the tip). The width of the tip portion may be the width at the tip.

In a plan view, the distance W4 between the second opposing electrode portion 16A (for example, the third extension portion 3 and the fourth extension portion 4) and the outer peripheral edge 70a of the colored region 70 may be 0.25 mm or more. preferable. When the distance W4 is 0.25 mm or more, the second opposing electrode portion 16A is located sufficiently away from the colored region 70. Therefore, the influence from the colored region 70 can be suppressed, and deterioration of the second opposing electrode section 16A can be suppressed. When the distance W4 is 0.25 mm or more, external influences on the colored region 70 can be reduced. Therefore, the characteristics of the colored region 70 can be improved. The distance W4 is preferably 0.5 mm or more. The distance W4 may be, for example, 2 mm or less.

As shown in FIG. 3, the fourth extending portion 4 is colored starting from an intermediate position in the length direction of the second opposing electrode portion 16A (the position where the second extraction portion 16B is formed) (second base portion). This is a linear portion extending along the outer peripheral edge 70a of the region 70 to the other side (clockwise direction in FIG. 3). The fourth extending portion 4 extends in the −Y direction (downward in FIG. 3) while approaching the first opposing electrode portion 15A (specifically, the second extending portion 2). The fourth extending portion 4 is curved so that the inclination angle (inclination angle with respect to the X direction) gradually decreases toward the tip.

In plan view, the width of a portion (tip portion) including at least the tip (one end) of the fourth extension portion 4 may be, for example, 0.1 mm or more and 1.0 mm or less. Since the width of the tip portion is 0.1 mm or more, electrical resistance can be reduced. Therefore, coloring and decoloring in the colored region 70 can be performed without delay. Since the width of the tip portion is 1.0 mm or less, it is difficult to visually recognize it from the outside. Therefore, the fourth extending portion 4 is less noticeable. Therefore, the aesthetic appearance of the sunglasses 100 can be enhanced. The width of the tip portion may be 0.3 mm or more and 1.0 mm or less.

In this embodiment, the tip portion of the fourth extension portion 4 is a length portion having a constant width.
The tip portion of the fourth extending portion 4 is not limited to a shape having a constant width, but may have a shape whose width gradually becomes narrower toward the tip. In that case, the width of the tip portion may be the average width of a predetermined length range (for example, a length range of 5 mm from the tip). The width of the tip portion may be the width at the tip.

The fourth extending portion 4 may be longer than the third extending portion 3, or may have the same length as the third extending portion 3. The dimension of the fourth extension part 4 in the Y direction may be larger than the dimension of the third extension part 3 in the Y direction.

Since the second opposing electrode section 16A includes the third extension section 3 and the fourth extension section 4, it is possible to apply a voltage evenly to a wide range of the colored region 70. Therefore, sufficient coloring (coloring) and decoloring can be achieved in a wide range of the colored region 70.

The first extending portion 1 and the third extending portion 3 are arranged facing each other in the X direction. The first extending portion 1 and the third extending portion 3 extend in a direction toward each other. The tips of the first extending portion 1 and the third extending portion 3 face each other. The second extending portion 2 and the fourth extending portion 4 are arranged facing each other in the X direction. The second extending portion 2 and the fourth extending portion 4 extend in a direction toward each other. The tips of the second extending portion 2 and the fourth extending portion 4 face each other.

As shown in FIG. 6, the second extraction portion 16B protrudes from a part of the outer peripheral edge of the second counter electrode portion 16A in the +X direction (direction away from the colored region 70). The second extraction portion 16B is formed, for example, at a position overlapping the second protrusion 14B of the second transparent electrode 14. The second extraction portion 16B is formed at a position corresponding to a connecting portion (a portion where the bridge portion 22 or the temple portion 23 is connected to the rim portion 21).

Examples of the constituent materials of the first auxiliary electrode 15 and the second auxiliary electrode 16 include metals such as silver, aluminum, copper, chromium, and molybdenum. As a constituent material of the first auxiliary electrode 15 and the second auxiliary electrode 16, conductive ink can also be used. As the constituent materials for the first auxiliary electrode 15 and the second auxiliary electrode 16, one of these may be used, or two or more may be used in combination. The first auxiliary electrode 15 and the second auxiliary electrode 16 can be formed by, for example, sputtering, vapor deposition, or the like. The first auxiliary electrode 15 and the second auxiliary electrode 16 can also be formed by printing using conductive ink.
The average thickness of the first auxiliary electrode 15 and the second auxiliary electrode 16 is preferably 1 nm or more and 100 nm or less, more preferably 5 nm or more and 50 nm or less.

The total thickness of the electrochromic sheet 150 is preferably 0.3 mm or more and 10.0 mm or less, more preferably 0.5 mm or more and 5.0 mm or less. By setting the total thickness of the electrochromic sheet 150 within the above range, it is possible to impart excellent strength to the electrochromic sheet 150 and improve thermoformability when forming the electrochromic sheet 150 into the curved sheet 120. can.

As described above, after the electrochromic sheet 150 is laminated with the resin layer 35 (see FIG. 2(D)), the electrochromic sheet 150 is formed into the lens 30 according to the rim portion 21 (see FIG. 1) by trimming, cutting, etc. It is cut out. The imaginary lines shown in FIGS. 3, 7, and 8 indicate the outer peripheral edge 30a of the lens 30.

As shown in FIGS. 7 and 8, the area from the outer periphery 70a of the colored area 70 to the outer periphery 30a of the lens 30 in the sealing part 55 that partitions the colored area 70 is referred to as a sealed area 56. The sealing area 56 is an annular area surrounding the colored area 70 (see FIG. 3). The sealing area 56 has a function of protecting the colored area 70. The sealing region 56 also functions as an adhesive layer that adheres the plurality of layers constituting the electrochromic sheet 150 and maintains their laminated state. The outer peripheral edge 30a is the outer peripheral edge of the sealing area 56.

As shown in FIGS. 7 and 8, the width W5 of the sealing region 56 is 1 mm or more and 3 mm or less. It is desirable that the sealing region 56 covers this range over the entire circumference. The width W5 of the sealing region 56 is preferably 1.5 mm or more and 2.5 mm or less.

Since the sealing region 56 has a width W5 of 1 mm or more, it is possible to restrict infiltration of moisture and the like from the outside and protect the first counter electrode section 15A and the second counter electrode section 16A. That is, it is possible to prevent the first counter electrode section 15A and the second counter electrode section 16A from deteriorating due to oxidation or the like. Since the sealing region 56 has a width W5 of 1 mm or more, it is possible to prevent moisture from entering from the outside and protect the colored region 70. Since the width W5 of the sealing region 56 is 1 mm or more, the durability of the sealing region 56 when manufacturing the lens 30 by cutting can be improved. Since the width W5 of the sealing region 56 is 1 mm or more, sufficient adhesion to other layers can be ensured even when thermoforming the electrochromic sheet 150 to produce a curved sheet.

Since the sealing region 56 has a width W5 of 3 mm or less, the non-colored region in the lens 30 can be narrowed. Therefore, the electrochromic sheet 150 is suitable in terms of aesthetic appearance. Since the electrochromic sheet 150 has a narrow sealing area 56, which is a non-colored area, it has a high degree of freedom in design and is suitable in terms of design.

As shown in FIG. 7, the distance W6 between the first opposing electrode portion 15A and the outer peripheral edge 30a of the lens 30 is preferably 0.25 mm or more in plan view. When the distance W6 is 0.25 mm or more, it is possible to restrict the intrusion of moisture and the like from the outside and prevent the first auxiliary electrode 15 from deteriorating due to oxidation and the like. The distance W6 may be, for example, 1 mm or less.

As shown in FIG. 8, the distance W7 between the second opposing electrode portion 16A and the outer peripheral edge 30a of the lens 30 is preferably 0.25 mm or more in plan view. When the distance W7 is 0.25 mm or more, it is possible to restrict the intrusion of moisture and the like from the outside and prevent the second auxiliary electrode 16 from deteriorating due to oxidation or the like. The distance W7 may be, for example, 1 mm or less.

In the electrochromic sheet 150 of this embodiment, since the width W5 of the sealing region 56 is 1 mm or more and 3 mm or less, it is possible to prevent the first auxiliary electrode 15 and the second auxiliary electrode 16 from deteriorating due to oxidation or the like. Excellent in terms of aesthetics. Therefore, it is possible to realize an electrochromic sheet 150 with good electrochromic properties and excellent aesthetic appearance.

The electrochromic sheet 150 includes a first electrochromic layer 63 whose color changes due to an oxidation reaction, a second electrochromic layer 64 whose color changes due to a reduction reaction, and an electrolyte layer 65. Since the electrochromic sheet 150 includes two electrochromic layers, the driving voltage of the electrochromic element 60 can be suppressed. Therefore, the repeat durability of the electrochromic element 60 can be improved.

When the distances W2 and W4 between the first opposing electrode section 15A and the second opposing electrode section 16A and the outer peripheral edge 70a of the colored region 70 are 0.25 mm or more, the first opposing electrode section 15A and the second opposing electrode section 16A is located sufficiently away from the colored area 70. Therefore, the influence from the colored region 70 can be suppressed, and deterioration of the first counter electrode section 15A and the second counter electrode section 16A can be suppressed.

When the distances W6 and W7 between the first opposing electrode section 15A and the second opposing electrode section 16A and the outer peripheral edge 30a of the lens 30 are 0.25 mm or more, infiltration of moisture etc. from the outside is restricted, and the first Deterioration of the auxiliary electrode 15 and the second opposing electrode section 16A can be suppressed.

Lens 30 and sunglasses 100 have the same effect as electrochromic sheet 150.

Although the electrochromic sheet, spectacle lens, and spectacles of the embodiment have been described, the present invention is not limited thereto.
For example, the electrochromic sheet 150 shown in FIG. 5 has two electrochromic layers 63 and 64, but the number of electrochromic layers is not limited to two. The number of electrochromic layers may be one or multiple (any number greater than or equal to 2).

The electrochromic layer may change color by at least one of an oxidation reaction and a reduction reaction. For example, the electrochromic layer may utilize only a color change due to an oxidation reaction, or may utilize only a color change due to a reduction reaction. The electrochromic layer may be configured to change color using both an oxidation reaction and a reduction reaction. The electrochromic sheet may include an electrochromic layer that changes color by at least one of an oxidation reaction and a reduction reaction.

The width W5 of the sealing area 56 shown in FIGS. 7 and 8 indicates the width of the sealing area 56 in the length range of the first extension part 1 and the third extension part 3. The width W5 may be 1 mm or more and 3 mm or less within a range where at least the first counter electrode section 15A and the second counter electrode section 16A are present.

Each layer constituting the electrochromic element 60 of the electrochromic sheet 150 shown in FIG. 5 may be replaced with another structure that exhibits a similar function. The electrochromic sheet 150 may further include another layer (intermediate layer) between the substrates 11 and 12 and the electrochromic element 60.

DESCRIPTION OF SYMBOLS 1... First extension part 2... Second extension part 3... Third extension part 4... Fourth extension part 11... First board 12... Second board 13... First transparent electrode 14... Second transparent electrode 15... First auxiliary electrode 15A... First counter electrode section 16... Second auxiliary electrode 16A... Second counter electrode section 17... First conductive part 18... Second conductive part 30... Lens (lens for eyeglasses)
55... Sealing part 56... Sealing region 60... Electrochromic element 63... First electrochromic layer (electrochromic layer)
64... Second electrochromic layer (electrochromic layer)
65... Electrolyte layer 70... Colored area 70a... Outer rim 100... Sunglasses (glasses)
150... Electrochromic sheet W2... Distance between the first counter electrode part and the outer periphery of the colored region W4... Distance between the second counter electrode part and the outer periphery of the colored region W5... Width of the sealing area W6... Distance between the first opposing electrode part and the outer periphery of the lens (lens for spectacles) W7... Distance between the second opposing electrode part and the lens (lens for spectacles) Distance from outer edge

Claims (4)

An electrochromic sheet used for eyeglass lenses,
a first substrate;
a second substrate disposed opposite to the first substrate;
an electrochromic element that is provided between the first substrate and the second substrate and forms a colored region that changes color upon application of a voltage;
an insulating sealing part that partitions the colored area;
a first auxiliary electrode electrically connected to the electrochromic element;
a second auxiliary electrode electrically connected to the electrochromic element,
The electrochromic element is
a first transparent electrode electrically connected to the first auxiliary electrode;
a second transparent electrode electrically connected to the second auxiliary electrode;
one or more electrochromic layers whose color changes due to at least one of an oxidation reaction and a reduction reaction,
The first auxiliary electrode has a lower electrical resistance than the first transparent electrode,
a first opposing electrode portion extending along a part of the outer periphery of the colored region ;
a first extraction part protruding from the outer peripheral edge of the first counter electrode part to the outside of the colored area, and to which the voltage is applied;
The second auxiliary electrode has a lower electrical resistance than the second transparent electrode,
a second opposing electrode portion extending along another part of the outer periphery of the colored region ;
a second extraction part protruding from the outer peripheral edge of the second counter electrode part to the outside of the colored area, and to which the voltage is applied;
The second counter electrode section is located on the opposite side of the first counter electrode section with respect to the colored region and faces the first counter electrode section,
The width of the sealing area, which is the area from the outer periphery of the colored area to the outer periphery of the spectacle lens in the sealing part, is 1 mm or more and 3 mm or less,
The first counter electrode part has a first extending part extending in a first circumferential direction along the outer periphery of the colored area from a location where the first taking out part is formed , and the first taking out part is formed. a second extending portion extending from the location along the outer peripheral edge of the colored region in a second circumferential direction opposite to the first circumferential direction;
The second opposing electrode portion includes a third extending portion extending in the second circumferential direction from a location where the second extraction portion is formed along an outer peripheral edge of the colored region, and the second extraction portion. a fourth extending portion extending in the first circumferential direction from a location along the outer peripheral edge of the colored region;
The first extending portion and the third extending portion are arranged to face each other in the left-right direction,
The second extension part and the fourth extension part are arranged facing each other in the left-right direction,
the first extending portion is shorter than the second extending portion;
the third extending portion is shorter than the fourth extending portion;
The second extending portion extends downward while approaching the fourth extending portion, and is curved at a tip portion such that an inclination angle with respect to the left-right direction gradually decreases;
The fourth extending portion extends downward while approaching the second extending portion, and is curved at a tip portion such that an inclination angle with respect to the left-right direction gradually decreases;
The distance between the first extension part and the third extension part and the outer peripheral edge of the colored area is 0.25 mm or more,
The distance between the first extending part and the third extending part and the outer peripheral edge of the spectacle lens is 0.25 mm or more,
The first transparent electrode includes a first body portion that covers the colored region, and a first protrusion portion that protrudes from the outer peripheral edge of the first body portion to the outside of the colored region,
The second transparent electrode includes a second body portion that covers the colored region, and a second protrusion portion that protrudes from the outer peripheral edge of the second body portion to the outside of the colored region,
the first extraction part is formed at a position overlapping with the first protrusion,
The second extraction portion is formed at a position overlapping the second protrusion.
electrochromic sheet. The plurality of electrochromic layers include a first electrochromic layer electrically connected to the first transparent electrode, and a second electrochromic layer electrically connected to the second transparent electrode,
The electrochromic device further includes an electrolyte layer filled between the first electrochromic layer and the second electrochromic layer,
The first electrochromic layer contains a material that changes color due to an oxidation reaction, and the second electrochromic layer contains a material that changes color due to a reduction reaction.
The electrochromic sheet according to claim 1. comprising the electrochromic sheet according to claim 1 or 2,
Lenses for glasses. Eyeglasses comprising the eyeglass lens according to claim 3.

Images