Electrochromic sheet, laminate, lens for eyeglasses, and eyeglasses

Abstract

This electrochromic sheet is provided with a first substrate, a second substrate, an electrochromic element, and a sealing part, the electrochromic element having a first transparent electrode, a first auxiliary electrode, a second transparent electrode, a second auxiliary electrode, and an electrochromic layer, the first auxiliary electrode having a first extraction part protruding to the outside of a colored region, the second auxiliary electrode having a second extraction part protruding to the outside of the colored region, and the electrochromic layer having a second extraction part protruding to the outside of the colored region. The second auxiliary electrode has a second extraction portion protruding to the outside of the colored region, the first extraction portion and the second transparent electrode do not overlap in plan view, and the second extraction portion and the first transparent electrode do not overlap in plan view, and in a cross-section connecting the first extraction portion and the colored region, the first extraction portion and the second extraction portion are spaced apart from each other. The distance from the end portion of the second transparent electrode on the first extraction portion side to the colored region is 0.01 mm or more and 1.0 mm or less.

Description

Technical Field

[0001] The present invention relates to an electrochromic sheet, a laminate, a lens for spectacles and spectacles.

[0002] This application claims priority based on Japanese Patent Application No. 2022-158550 filed in Japan on September 30, 2022, Japanese Patent Application No. 2022-158551 filed in Japan on September 30, 2022, Japanese Patent Application No. 2022-158552 filed in Japan on September 30, 2022, Japanese Patent Application No. 2022-158553 filed in Japan on September 30, 2022, Japanese Patent Application No. 2022-158554 filed in Japan on September 30, 2022, Japanese Patent Application No. 2022-158555 and Japanese Patent Application No. 2022-158556 filed in Japan on September 30, 2022, and the contents of which are incorporated herein by reference. Background Art

[0003] Electrochromism is a phenomenon in which a redox reaction is induced by applying a voltage to reversibly change the color. As an element utilizing this phenomenon, an electrochromic element is known that uses a material that exhibits electrochromism and controls the color by applying a voltage.

[0004] The electrochromic element includes, for example, an electrochromic layer that develops and disappears color by application of voltage and a transparent electrode. The transparent electrode sandwiches the electrochromic layer and is electrically connected to the electrochromic layer (for example, refer to Patent Document 1).

[0005] An electrochromic sheet including an electrochromic element is used as a material for eyewear such as sunglasses.

[0006] Prior art literature

[0007] Patent Literature

[0008] Patent document 1: Japanese Patent Application Publication No. 2017-167317. Summary of the invention

[0009] Technical issues to be solved by the invention

[0010] The transparent electrode used in the structure of Patent Document 1 is formed using a material having high conductivity and high visible light transmittance. As a material for the transparent electrode, oxides such as ITO (Indium Tin Oxide) are known.

[0011] On the other hand, the above materials have higher resistance than metal materials. Therefore, in the electrochromic layer sandwiched by the transparent electrodes made of ITO, there are areas where current is easily conducted and areas where it is not easily conducted, and the discoloration (coloration, color loss) of the electrochromic layer is prone to color unevenness.

[0012] The present invention has been made in view of such a situation, and an object thereof is to provide an electrochromic sheet that can develop and eliminate color without delay. Another object thereof is to provide a laminated body having such an electrochromic sheet, a lens for spectacles, and spectacles having the lens for spectacles.

[0013] Means for solving technical problems

[0014] In order to solve the above problems, the structure of the auxiliary electrode that supplements the conductivity of the transparent electrode has been studied. Generally, the auxiliary electrode is formed using a metal material with a lower resistance than the material of the transparent electrode. By setting the structure using the auxiliary electrode, the above-mentioned color change delay problem can be solved.

[0015] On the other hand, the auxiliary electrode formed of a metal material often does not have light transmittance. Therefore, in consideration of the aesthetics of the electrochromic sheet, it is desirable that the auxiliary electrode be inconspicuous.

[0016] In order to solve the above-mentioned problems, one aspect of the present invention includes the following aspects.

[0017] [1] An electrochromic sheet, comprising: a first substrate; a second substrate; an electrochromic element sandwiched by the first substrate and the second substrate; and a sealing portion sandwiched by the first substrate and the second substrate and dividing a coloring area set between the first substrate and the second substrate, wherein the electrochromic element comprises: a first transparent electrode disposed on the first substrate side; a first auxiliary electrode disposed around the coloring area and electrically connected to the first transparent electrode; a second transparent electrode disposed on the second substrate side; a second auxiliary electrode disposed around the coloring area and electrically connected to the second transparent electrode; and an electrochromic layer, The auxiliary electrode is sandwiched by the first transparent electrode and the second transparent electrode, is arranged in the colored area, and is colored by the application of voltage, the first auxiliary electrode has a first extraction portion protruding to the outside of the colored area, the second auxiliary electrode has a second extraction portion protruding to the outside of the colored area, in a plan view, the first extraction portion does not overlap with the second transparent electrode, and the second extraction portion does not overlap with the first transparent electrode, and on a cross section connecting the first extraction portion and the colored area, a distance from an end of the second transparent electrode on the first extraction portion side to the colored area is greater than 0.01 mm and less than 1.0 mm.

[0018] [2] An electrochromic sheet according to [1] or [2], wherein, in a cross section connecting the second extraction portion and the colored region, a distance from an end of the first transparent electrode on the second extraction portion side to the colored region is greater than 0.01 mm and less than 1.0 mm.

[0019] [3] An electrochromic sheet according to [1] or [2], wherein the electrochromic layer comprises: a first electrochromic layer stacked on the first transparent electrode; a second electrochromic layer stacked on the second transparent electrode; and an electrolyte layer filled between the first electrochromic layer and the second electrochromic layer, wherein the first electrochromic layer contains a material that exhibits color through an oxidation reaction, and the second electrochromic layer contains a material that exhibits color through a reduction reaction.

[0020] [4] A laminate comprising: the electrochromic sheet according to any one of [1] to [3]; and a lens component on which the electrochromic sheet is laminated.

[0021] [5] A lens for spectacles, comprising: an electrochromic portion obtained by cutting the electrochromic sheet described in any one of [1] to [3] along the periphery of the first auxiliary electrode and the second auxiliary electrode; and a lens body on which the electrochromic portion is stacked, the lens body having a protrusion having the same shape as the first extraction portion and the second extraction portion when viewed from above.

[0022] [6] A pair of glasses comprising: the spectacles lens described in [5]; and a frame that holds the spectacles lens, wherein the first extraction portion and the second extraction portion are electrically connected to the frame.

[0023] [7] An electrochromic sheet, comprising: a first substrate; a second substrate; an electrochromic element sandwiched between the first substrate and the second substrate; and a sealing portion sandwiched between the first substrate and the second substrate and defining a coloring region between the first substrate and the second substrate, wherein the electrochromic element comprises: a first transparent electrode disposed on the first substrate side; a first auxiliary electrode disposed around the coloring region and electrically connected to the first transparent electrode; a second transparent electrode disposed on the second substrate side; and a second auxiliary electrode disposed Around the colored area and electrically connected to the second transparent electrode; and an electrochromic layer, which is clamped by the first transparent electrode and the second transparent electrode, is arranged in the colored area, and is colored by the application of voltage, the first auxiliary electrode comprising: a strip-shaped first frame body, surrounding a portion of the electrochromic layer; and a first take-out portion, protruding from the first frame body to the outside of the colored area, the contour line of the connection part between the first frame body and the first take-out portion is a convex curve on the colored area side, and the curvature radius of the curve is greater than 40 mm.

[0024] [8] The electrochromic sheet according to [7], wherein a width of the first lead-out portion from the first frame toward the outside is 10 mm or less.

[0025] [9] An electrochromic sheet according to [7] or [8], wherein the second auxiliary electrode comprises: a strip-shaped second frame body surrounding a portion of the electrochromic layer; and a second extraction portion protruding from the second frame body toward the outside of the colored area, wherein the contour line of the connection portion between the second frame body and the second extraction portion is a convex curve on the colored area side, and the curvature radius of the curve is greater than 40 mm.

[0026]

[10] The electrochromic sheet according to [9], wherein a width of the second lead-out portion from the second frame toward the outside is 10 mm or less.

[0027]

[11] An electrochromic sheet according to any one of [7] to

[10] , wherein the electrochromic layer comprises: a first electrochromic layer stacked on the first transparent electrode; a second electrochromic layer stacked on the second transparent electrode; and an electrolyte layer filled between the first electrochromic layer and the second electrochromic layer, the first electrochromic layer contains a material that exhibits color through an oxidation reaction, and the second electrochromic layer contains a material that exhibits color through a reduction reaction.

[0028]

[12] A laminate comprising: the electrochromic sheet according to any one of [7] to

[11] ; and a lens component on which the electrochromic sheet is laminated.

[0029]

[13] A lens for spectacles, comprising: an electrochromic portion obtained by cutting the electrochromic sheet described in any one of [7] to

[11] along the periphery of the first auxiliary electrode and the second auxiliary electrode; and a lens body on which the electrochromic portion is stacked, the lens body having a protrusion having the same shape as the first extraction portion when viewed from above.

[0030]

[14] A pair of glasses comprising: the spectacles lens described in

[13] ; and a frame that holds the spectacles lens, wherein the first removal portion is electrically connected to the frame.

[0031]

[15] An electrochromic sheet, comprising: a first substrate; a second substrate; an electrochromic element sandwiched by the first substrate and the second substrate; and a sealing portion sandwiched by the first substrate and the second substrate and dividing a coloring area set between the first substrate and the second substrate, wherein the electrochromic element comprises: a first transparent electrode disposed on the first substrate side; a first auxiliary electrode disposed around the coloring area and electrically connected to the first transparent electrode; a second transparent electrode disposed on the second substrate side; a second auxiliary electrode disposed around the coloring area and electrically connected to the second transparent electrode; and an electrochromic layer sandwiched by the first transparent electrode and the second transparent electrode and disposed in the coloring area. And it is colored by applying voltage, the first auxiliary electrode comprises: a strip-shaped first frame body, surrounding a part of the electrochromic layer; and a first take-out portion, protruding from the first frame body to the outside of the colored area, the second auxiliary electrode comprises: a strip-shaped second frame body, surrounding a part of the electrochromic layer; and a second take-out portion, protruding from the second frame body to the outside of the colored area, when assuming the smallest virtual rectangle in the rectangle circumscribing the colored area in a plan view, the first take-out portion is arranged at one end side in the direction of one side of the virtual rectangle, and the second take-out portion is arranged at the other end side in the direction of the one side, and the first take-out portion and the second take-out portion are arranged separated by more than 40% of the length of the one side in the direction of the one side.

[0032]

[16] The electrochromic sheet according to

[15] , wherein the first extraction portion is provided in a region from one end of the side to 30% of the length, and the second extraction portion is provided in a region from the other end of the side to 30% of the length.

[0033]

[17] The electrochromic sheet according to

[16] , wherein the first extraction portion is provided in a region from the one end to 10% of the length, and the second extraction portion is provided in a region from the other end to 10% of the length.

[0034]

[18] An electrochromic sheet according to any one of

[15] to

[17] , wherein the first extraction portion and the second extraction portion are arranged in a region extending from one end to the center of the virtual rectangle in a direction orthogonal to the side of the virtual rectangle.

[0035]

[19] An electrochromic sheet according to any one of

[15] to

[18] , wherein the electrochromic layer comprises: a first electrochromic layer stacked on the first transparent electrode; a second electrochromic layer stacked on the second transparent electrode; and an electrolyte layer filled between the first electrochromic layer and the second electrochromic layer, the first electrochromic layer contains a material that exhibits color through an oxidation reaction, and the second electrochromic layer contains a material that exhibits color through a reduction reaction.

[0036]

[20] A laminate comprising: the electrochromic sheet according to any one of

[15] to

[19] ; ​​and a lens component on which the electrochromic sheet is laminated.

[0037]

[21] A lens for spectacles, comprising: an electrochromic portion obtained by cutting the electrochromic sheet described in any one of

[15] to

[19] along the periphery of the first auxiliary electrode and the second auxiliary electrode; and a lens body on which the electrochromic portion is stacked, the lens body having a protrusion having the same shape as the first extraction portion and the second extraction portion when viewed from above.

[0038]

[22] A pair of glasses, comprising: the spectacles lens described in

[21] ; and a frame that holds the spectacles lens, wherein the first extraction portion and the second extraction portion are electrically connected to the frame.

[0039]

[23] A laminated body, comprising: an electrochromic sheet; and a lens component on which the electrochromic sheet is laminated, wherein the electrochromic sheet comprises: a first substrate; a second substrate; an electrochromic element clamped by the first substrate and the second substrate; a sealing portion clamped by the first substrate and the second substrate and dividing a colored area set between the first substrate and the second substrate; and a terminal portion electrically connected to the electrochromic element and arranged on a surface of the first substrate or the second substrate, wherein the electrochromic element has: a first transparent electrode arranged on the first substrate side; a first auxiliary electrode arranged around the colored area and electrically connected to the first transparent electrode; a second transparent electrode arranged on the second substrate side; a second auxiliary electrode arranged around the colored area and electrically connected to the second The transparent electrode is electrically connected; and the electrochromic layer is clamped by the first transparent electrode and the second transparent electrode, and is arranged in the colored area, and is colored by the application of voltage, the terminal portion comprises: a first terminal portion, which is electrically connected to the first auxiliary electrode; and a second terminal portion, which is electrically connected to the second auxiliary electrode, the first terminal portion comprises: a first conductive portion, which passes through the first substrate or the second substrate, and is electrically connected to the first auxiliary electrode; and a first terminal, which is arranged on the surface of the first substrate or the second substrate, and is connected to the first conductive portion, the second terminal portion comprises: a second conductive portion, which passes through the first substrate or the second substrate, and is electrically connected to the second auxiliary electrode; and a second terminal, which is arranged on the surface of the first substrate or the second substrate, and is connected to the second conductive portion.

[0040]

[24] The laminate according to

[23] , wherein the terminal portion further includes an external connection terminal for connecting to an external device.

[0041]

[25] A laminate according to

[23] or

[24] , wherein the electrochromic layer comprises: a first electrochromic layer stacked on the first transparent electrode; a second electrochromic layer stacked on the second transparent electrode; and an electrolyte layer filled between the first electrochromic layer and the second electrochromic layer, wherein the first electrochromic layer contains a material that exhibits color through an oxidation reaction, and the second electrochromic layer contains a material that exhibits color through a reduction reaction.

[0042]

[26] A lens for spectacles, comprising: an electrochromic portion obtained by cutting the electrochromic sheet of the stacked body described in any one of

[23] to

[25] along the periphery of the first auxiliary electrode and the second auxiliary electrode; and a lens body on which the electrochromic portion is stacked.

[0043]

[27] A pair of glasses comprising: the lens for glasses described in

[26] ; and a frame for holding the lens for glasses.

[0044]

[28] An electrochromic sheet, comprising: a first substrate; a second substrate disposed opposite to the first substrate; an electrochromic element disposed between the first substrate and the second substrate and forming a coloring region whose color changes by application of a voltage; an insulating sealing portion dividing the coloring region; a first auxiliary electrode electrically connected to the electrochromic element; and a second auxiliary electrode electrically connected to the electrochromic element, wherein the electrochromic element comprises: a first transparent electrode electrically connected to the first auxiliary electrode; a second transparent electrode electrically connected to the second auxiliary electrode; and one or more electrochromic layers, which undergo oxidation and reduction reactions. The color changes due to at least one reaction, the first auxiliary electrode has a lower resistance than the first transparent electrode, and has a first counter electrode portion extending along a portion of the outer periphery of the colored area, the second auxiliary electrode has a lower resistance than the second transparent electrode, and has a second counter electrode portion extending along another portion of the outer periphery of the colored area, the second counter electrode portion is located on the side opposite to the first counter electrode portion with respect to the colored area and is opposite to the first counter electrode portion, and the width of at least one end of the first counter electrode portion and the second counter electrode portion is greater than 0.1 mm and less than 1.0 mm.

[0045]

[29] An electrochromic sheet according to

[28] , wherein 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 element further comprising an electrolyte layer filled between the first electrochromic layer and the second electrochromic layer, the first electrochromic layer containing a material that changes color through an oxidation reaction, and the second electrochromic layer containing a material that changes color through a reduction reaction.

[0046]

[30] An electrochromic sheet according to

[28] or

[29] , wherein the first counter electrode portion comprises: a first extension portion extending toward one side along the outer periphery of the colored region; and a second extension portion extending toward the other side along the outer periphery of the colored region, and the second counter electrode portion comprises: a third extension portion extending toward one side along the outer periphery of the colored region; and a fourth extension portion extending toward the other side along the outer periphery of the colored region, the first extension portion and the third extension portion being arranged relative to each other, the one end of the first counter electrode portion being the front end of the first extension portion, and the one end of the second counter electrode portion being the front end of the third extension portion.

[0047]

[31] An electrochromic sheet according to any one of

[28] to

[30] , wherein the distance between the first counter electrode portion and the second counter electrode portion and the outer periphery of the colored region in a plan view is greater than 0.25 mm.

[0048]

[32] A spectacles lens comprising the electrochromic sheet according to any one of

[28] to

[31] .

[0049]

[33] A pair of glasses comprising the spectacles lens described in

[32] .

[0050]

[34] An electrochromic sheet, wherein it is used for a lens for spectacles, the electrochromic sheet comprising: a first substrate; a second substrate disposed opposite to the first substrate; an electrochromic element disposed between the first substrate and the second substrate and forming a coloring area whose color changes by application of voltage; an insulating sealing portion that divides the coloring area; a first auxiliary electrode 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; a second transparent electrode electrically connected to the second auxiliary electrode; and one or more electrochromic layers that undergo oxidation and reduction reactions. The color of the colored area changes due to at least one of the original reactions, the first auxiliary electrode has a lower resistance than the first transparent electrode, and has a first counter electrode portion extending along a portion of the outer periphery of the colored area, the second auxiliary electrode has a lower resistance than the second transparent electrode, and has a second counter electrode portion extending along another portion of the outer periphery of the colored area, the second counter electrode portion is located on the side opposite to the first counter electrode portion with respect to the colored area and is opposite to the first counter electrode portion, and the width of the sealing portion from the outer periphery of the colored area to the outer periphery of the eyeglass lens, that is, the sealing portion, is greater than 1 mm and less than 3 mm.

[0051]

[35] An electrochromic sheet according to

[34] , wherein 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 element further comprising an electrolyte layer filled between the first electrochromic layer and the second electrochromic layer, the first electrochromic layer containing a material that changes color through an oxidation reaction, and the second electrochromic layer containing a material that changes color through a reduction reaction.

[0052]

[36] An electrochromic sheet according to

[34] or

[35] , wherein the distance between the first opposing electrode portion and the second opposing electrode portion and the outer periphery of the colored region when viewed from above is greater than 0.25 mm, and the distance between the first opposing electrode portion and the second opposing electrode portion and the outer periphery of the eyeglass lens when viewed from above is greater than 0.25 mm.

[0053]

[37] A spectacles lens comprising the electrochromic film according to any one of

[34] to

[36] .

[0054]

[38] A pair of glasses comprising the spectacles lens described in

[37] .

[0055]

[39] An electrochromic sheet, comprising: a first substrate; a second substrate disposed opposite to the first substrate; an electrochromic element disposed between the first substrate and the second substrate and forming a coloring region whose color changes by application of a voltage; an insulating sealing portion dividing the coloring region; a first auxiliary electrode electrically connected to the electrochromic element; and a second auxiliary electrode electrically connected to the electrochromic element, wherein the electrochromic element comprises: a first transparent electrode electrically connected to the first auxiliary electrode; a second transparent electrode electrically connected to the second auxiliary electrode; and one or more electrochromic layers, whose color changes by at least one of an oxidation reaction and a reduction reaction, wherein the first auxiliary electrode has a lower resistance than the first transparent electrode and has a first opposing electrode portion extending along a portion of the outer periphery of the coloring region, and the second auxiliary electrode has a lower resistance than the second transparent electrode. resistance, and having a second opposing electrode portion extending along another part of the outer periphery of the colored area, the second opposing electrode portion being located on the side opposite to the first opposing electrode portion relative to the colored area and opposite to the first opposing electrode portion, the first opposing electrode portion having: a first extension portion extending toward one side along the outer periphery of the colored area; and a second extension portion extending toward the other side along the outer periphery of the colored area, the second opposing electrode portion having: a third extension portion extending toward one side along the outer periphery of the colored area; and a fourth extension portion extending toward the other side along the outer periphery of the colored area, the first extension portion and the third extension portion extending in directions approaching each other, and the spacing between the front ends when viewed from above is greater than 0 mm and less than 20 mm, the second extension portion and the fourth extension portion extending in directions approaching each other, and the spacing between the front ends when viewed from above is greater than 0 mm and less than 20 mm.

[0056]

[40] An electrochromic sheet according to

[39] , wherein 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 element further comprising an electrolyte layer filled between the first electrochromic layer and the second electrochromic layer, the first electrochromic layer containing a material that changes color through an oxidation reaction, and the second electrochromic layer containing a material that changes color through a reduction reaction.

[0057]

[41] The electrochromic sheet according to

[39] or

[40] , wherein the distance between the first counter electrode portion and the second counter electrode portion and the outer periphery of the colored region in a plan view is greater than 0.25 mm.

[0058]

[42] A spectacles lens comprising the electrochromic film according to any one of

[39] to

[41] .

[0059]

[43] A pair of glasses comprising the spectacles lens described in

[42] .

[0060] Effects of the Invention

[0061] According to the present invention, an electrochromic sheet capable of developing and eliminating color without delay can be provided, and a laminated body having such an electrochromic sheet, a lens for spectacles, and spectacles having the lens for spectacles can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1 It is a perspective view showing sunglasses using the electrochromic sheet of this embodiment as a material.

[0063] Figure 2 It is an exploded perspective view of the electrochromic film 150 .

[0064] Figure 3 yes Figure 2 A partial cross-sectional view taken along line segment III-III.

[0065] Figure 4 yes Figure 2 A partial cross-sectional view taken along line segment IV-IV.

[0066] Figure 5 It is a partially enlarged view of the first auxiliary electrode 33 .

[0067] Figure 6 It is a partially enlarged view of the second auxiliary electrode 34 .

[0068] Figure 7 It is an explanatory diagram for explaining a method of manufacturing a lens using the electrochromic sheet 150 (EC sheet 150).

[0069] Figure 8 It is an explanatory diagram showing the effect of the auxiliary electrode.

[0070] Fig. 9 It is an explanatory diagram showing the effect of the auxiliary electrode.

[0071] Fig.10 is a top view of the EC sheet 150 .

[0072] Fig.11 It is an explanatory diagram for explaining a method of manufacturing a lens using the EC sheet 150 .

[0073] Fig.12 It is an explanatory diagram showing the effect of the auxiliary electrode.

[0074] Fig.13 It is an explanatory diagram showing the effect of the auxiliary electrode.

[0075] Fig.14 It is an explanatory diagram showing the effect of the auxiliary electrode.

[0076] Fig.15 It is an exploded perspective view of the stacked body 160 .

[0077] Fig.16 yes Fig.15 A partial cross-sectional view taken along line segment III-III.

[0078] Fig.17 yes Fig.15 A partial cross-sectional view taken along line segment IV-IV.

[0079] Fig.18 It is a partially enlarged view of the first auxiliary electrode 33 .

[0080] Fig.19 It is a partially enlarged view of the second auxiliary electrode 34 .

[0081] Fig. 20 It is an explanatory diagram for explaining a method of manufacturing a lens using the laminated body 160 .

[0082] Fig.21 It is an explanatory diagram showing the effect of the auxiliary electrode.

[0083] Fig. 22 It is an explanatory diagram showing the effect of the auxiliary electrode.

[0084] Fig.23 It is a perspective view showing sunglasses using the electrochromic sheet according to the embodiment.

[0085] Fig.24 It is a diagram for explaining a method for manufacturing a lens using the electrochromic sheet according to the embodiment.

[0086] Fig.25 It is a top view showing the electrochromic film.

[0087] Fig.26 Yes means Fig.25 Schematic diagram of the AA section is shown.

[0088] Fig. 27 Schematic diagram showing a cross section of an electrochromic element.

[0089] Fig.28 It is an exploded perspective view showing an electrochromic sheet.

[0090] Fig.29 It is a top view of a portion of an electrochromic film.

[0091] Fig.30 It is a top view of a portion of an electrochromic film.

[0092] Fig.31 It is a top view showing the electrochromic film.

[0093] Fig.32 Yes means Fig.31 Schematic diagram of the AA section is shown.

[0094] Fig.33 Schematic diagram showing a cross section of an electrochromic element.

[0095] Fig.34 It is an exploded perspective view showing an electrochromic sheet.

[0096] Fig.35 It is a top view of a portion of an electrochromic film.

[0097] Fig.36 It is a top view of a portion of an electrochromic film.

[0098] Fig.37 It is a top view showing the electrochromic film. DETAILED DESCRIPTION

[0099] (First embodiment)

[0100] Below, reference Figures 1 to 9 , the electrochromic sheet, laminate, eyeglass lens and eyeglasses involved in this embodiment are described. In addition, in all the following drawings, the size, proportion, etc. of each component are appropriately different for easy viewing of the drawings. In addition, in the following description, the term "electrochromic" is sometimes abbreviated as "EC".

[0101] "Glasses"

[0102] Figure 1This is a perspective view showing sunglasses (glasses) using the electrochromic sheet (EC sheet) of this embodiment as a material. Sunglasses are an example of glasses.

[0103] like Figure 1 As shown, the sunglasses 100 include a pair of lenses 110 (spectacle lenses) and a frame 120 .

[0104] [lens]

[0105] The lens 110 has visible light transmittance, and can reversibly develop and eliminate color by applying a switching voltage. In addition, in this specification, "lens (lens for glasses)" includes both lenses having a light-collecting function and lenses without a light-collecting function.

[0106] The lens 110 includes an electrochromic portion 111 (EC portion 111) formed of an EC sheet described later and a lens body 115 laminated with the EC portion 111. When the user wears the sunglasses 100, the lens body 115 is located on the user's side, and the EC portion 111 is located on the surface of the lens body 115 opposite to the user.

[0107] [Frame]

[0108] The frame 120 includes a pair of rims 121, a center bridge 122, a pair of temples 123, and a pair of nose pads 124. The frame 120 is worn on the head of the user. The frame 120 allows the lens 110 to be arranged in front of the user's eyes.

[0109] The frame 121 is formed in a closed loop. A pair of frame 121 corresponds to the right eye and the left eye of the user respectively. The frame 121 may also be in an open loop. Furthermore, the frame 120 may also be a structure without the frame 121.

[0110] The middle bridge 122 connects the pair of frame portions 121. When the middle bridge 122 is worn on the head of the user, it is located in front of the upper part of the nose of the user.

[0111] The pair of temple portions 123 are respectively connected to positions on the side opposite to the position connected to the center bridge portion 122 in the frame portion 121. When the temple portions 123 are worn on the head of the user, they are hung on the ears of the user.

[0112] The temple portion 123 includes a switch 125 and a battery 126. The switch 125 is exposed on the outer surface of the temple portion 123. The switch 125 is electrically connected to the lens 110 via wiring. The switch 125 can switch between applying a positive voltage, applying a negative voltage, and not applying a voltage to the lens 110, for example.

[0113] The battery 126 is built in the temple portion 123. The battery 126 is electrically connected to the lens 110 via wiring.

[0114] The nose pad 124 is formed at a position corresponding to the nose of the user in each frame portion 121. The nose pad 124 contacts the nose of the user. The nose pad 124 stabilizes the wearing state of the sunglasses 100.

[0115] As a constituent material of the eyeglass frame 120, for example, a metal material, a resin material, etc. can be used. In addition, the shape of the eyeglass frame 120 is not limited to the example shown in the figure as long as it can be worn on the head of the user.

[0116] Electrochromic Film

[0117] Figure 2 is an exploded perspective view of the electrochromic sheet 150 (EC sheet 150). Figure 3 yes Figure 2 A partial cross-sectional view of the line segment III-III, Figure 4 yes Figure 2 The EC sheet 150 is used as a material for eyeglass lenses described later.

[0118] like Figure 2 to Figure 4 As shown in FIG. 1 , the EC sheet 150 includes a first substrate 11, a second substrate 12, an electrochromic element 30 (EC element 30), and a sealing portion 40. Figure 2 In the embodiment, the sealing portion 40 is omitted.

[0119] The first substrate 11 and the second substrate 12 sandwich the EC element 30 and the sealing portion 40. The sealing portion 40 is disposed around the EC element 30 between the first substrate 11 and the second substrate 12, and partitions the first substrate 11 and the second substrate 12. The region partitioned by the sealing portion 40 is a coloring region AR whose color changes by voltage application.

[0120] [1st substrate, 2nd substrate]

[0121] The first substrate 11 and the second substrate 12 are the outermost layers of the EC sheet 150. The first substrate 11 and the second substrate 12 are arranged to face each other, and function as a protective layer for protecting the EC element 30 and the like.

[0122] The first substrate 11 and the second substrate 12 have visible light transmittance. In this specification, visible light transmittance is sometimes referred to as "transparency". Also, visible light transmittance is sometimes referred to as "transparency". If transparent, the first substrate 11 and the second substrate 12 may be colorless or colored.

[0123] The first substrate 11 and the second substrate 12 contain a transparent thermoplastic resin as a main material. Examples of such resins include acrylic resins, polystyrene resins, polyethylene resins, polypropylene resins, polyester resins (polyethylene terephthalate (PET), polyethylene naphthalate (PEN), etc.), polycarbonate resins, polyamide resins, cycloolefin resins, vinyl chloride resins, polyacetal resins, triacetyl cellulose (TAC), etc.

[0124] As the material of the first substrate 11 and the second substrate 12, one of the above-mentioned resins may be used, or two or more of them may be used in combination. As the material of the first substrate 11 and the second substrate 12, polycarbonate-based resins or polyamide-based resins are preferred.

[0125] Furthermore, as long as they have transparency, known fillers or additives may be included in the materials of the first substrate 11 and the second substrate 12. Furthermore, the first substrate 11 and the second substrate 12 may be a single layer or a laminate.

[0126] The refractive index of the first substrate 11 and the second substrate 12 at a wavelength of 589 nm is preferably 1.3 to 1.8, more preferably 1.4 to 1.65. By setting the refractive index of the first substrate 11 and the second substrate 12 within this range, the function of the electrochromic element 30 can be improved.

[0127] The average thickness of the first substrate 11 and the second substrate 12 is, for example, 0.05 mm to 10.0 mm, or preferably 0.3 mm to 5.0 mm.

[0128] [Electrochromic element]

[0129] The EC element 30 changes color (colors or fades) by electrochromism caused by voltage application. The EC element 30 includes a first transparent electrode 31, a second transparent electrode 32, a first auxiliary electrode 33, a second auxiliary electrode 34, and an electrochromic layer 35 (EC layer 35).

[0130] (First transparent electrode, second transparent electrode)

[0131] The first transparent electrode 31 is provided on the first substrate 11 side of the EC element 30 and is formed on the surface of the first substrate 11 on the second substrate 12 side. Furthermore, the second transparent electrode 32 is provided on the second substrate 12 side of the EC element 30 and is formed on the surface of the second substrate 12 on the first substrate 11 side.

[0132] exist Figure 2In the embodiment, the first transparent electrode 31 has a portion 31a protruding in the same manner as the first extraction portion 332 at a position overlapping with the first extraction portion 332 described later, but the portion 31a may not be provided. Similarly, the second transparent electrode 32 has a portion 32a protruding in the same manner as the second extraction portion 342 at a position overlapping with the second extraction portion 342 described later, but the portion 32a may not be provided.

[0133] The first transparent electrode 31 and the second transparent electrode 32 have transparency. As the material of the first transparent electrode 31 and the second transparent electrode 32, for example, ITO, FTO (F-doped Tin Oxide: fluorine-doped tin oxide), ATO (Antimony Tin Oxide: antimony tin oxide), IZO (Indium Zinc Oxide: indium zinc oxide), In2O3, SnO2, SnO2 containing Sb, ZnO containing Al and other oxides, Au, Pt, Ag, Cu or alloys containing them can be cited. As the material of the first transparent electrode 31 and the second transparent electrode 32, one of them can be used, or two or more of them can be used in combination.

[0134] The thickness of the first transparent electrode 31 and the second transparent electrode 32 is adjusted so as to ensure the required transparency and obtain a resistance value capable of appropriately applying a voltage to the EC layer 35. When ITO is used as the material of the first transparent electrode 31 and the second transparent electrode 32, the average thickness of the first transparent electrode 31 and the second transparent electrode 32 is, for example, independently set to 50 nm or more and 200 nm or less, preferably 50 nm or more and 150 nm or less, and more preferably 60 nm or more and 130 nm or less.

[0135] (First auxiliary electrode, second auxiliary electrode)

[0136] The first auxiliary electrode 33 is disposed around the colored region AR in the peripheral portion of the first transparent electrode 31 and is electrically connected to the first transparent electrode 31. The first auxiliary electrode 33 has a strip-shaped first frame body 331 and a first lead portion 332 protruding from the first frame body 331 to the outside of the colored region AR.

[0137] The first frame 331 surrounds a portion of the EC layer 35, that is, a portion of the colored region AR. The first frame 331 is curved in a plan view, but is not limited thereto. When the lens 110 is formed, the first frame 331 is provided at a position surrounding the lens 110. The width of the first frame 331 is preferably set to be greater than 0.1 mm and less than 1.0 mm, for example, and more preferably set to be greater than 0.3 mm and less than 1.0 mm.

[0138] The first extraction portion 332 is provided at a position closer to one end of the first frame body 331 than the center of the first frame body 331 in a plan view. When the lens 110 is manufactured, the first extraction portion 332 is provided near the center beam portion 122 or the temple portion 123 of the lens frame 120 .

[0139] As described later, when the EC sheet 150 is processed into the lens 110, a through hole 40a for exposing the first extraction portion 332 is formed at a position in the sealing portion 40 that overlaps with the first extraction portion 332 in a plane, and the first conductive portion 51 is formed in the through hole 40a. The first extraction portion 332 is used as a connection portion with the first conductive portion 51. The formed first conductive portion 51 is electrically connected to the first extraction portion 332 (first auxiliary electrode 33).

[0140] The second auxiliary electrode 34 is arranged around the colored region AR on the peripheral surface of the second transparent electrode 32 and is electrically connected to the second transparent electrode 32. The second auxiliary electrode 34 has a strip-shaped second frame body 341 and a second lead-out portion 342 protruding from the second frame body 341 to the outside of the colored region AR.

[0141] The second frame 341 surrounds a portion of the EC layer 35, that is, a portion of the colored region AR. The second frame 341 is curved in a plan view, but is not limited thereto. When the lens 110 is formed, the second frame 341 is provided at a position surrounding the lens 110. The width of the second frame 341 is preferably set to be greater than 0.1 mm and less than 1.0 mm, for example, and more preferably set to be greater than 0.3 mm and less than 1.0 mm.

[0142] The second extraction portion 342 is provided at a position closer to one end of the second frame body 341 than the center of the second frame body 341 in a plan view. When the lens 110 is manufactured, the second extraction portion 342 is provided near the center beam portion 122 or the temple portion 123 of the lens frame 120 .

[0143] In the sealing portion 40, a through hole 40b for exposing the second extraction portion 342 is also formed at a position that overlaps with the second extraction portion 342 in a plane, and a second conductive portion 52 is formed in the through hole 40b. The second extraction portion 342 is used as a connection site with the second conductive portion 52. The formed second conductive portion 52 is electrically connected to the second extraction portion 342 (second auxiliary electrode 34).

[0144] The first auxiliary electrode 33 and the second auxiliary electrode 34 do not overlap each other in a plan view and are located on opposite sides across the colored region AR in a plan view. Furthermore, the first lead-out portion 332 does not overlap the second transparent electrode 32 , and the second lead-out portion 342 does not overlap the first transparent electrode 31 .

[0145] Assuming the smallest rectangle among the rectangles circumscribing the first transparent electrode 31 in a plan view, the first auxiliary electrode 33 of the EC sheet of this embodiment is provided in a region on one end of one side of the rectangle, and the second auxiliary electrode 34 is provided in a region on one end of one side.

[0146] In the side direction perpendicular to one side of the rectangle, the length of the first auxiliary electrode 33 (first frame body 331 ) is not less than 50% and not more than 100% of the length of the first transparent electrode 31 in the perpendicular direction.

[0147] Furthermore, the length of the second auxiliary electrode 34 (the second frame body 341 ) in the orthogonal direction is not less than 50% and not more than 100% of the length of the second transparent electrode 32 in the orthogonal direction.

[0148] The resistance value of the first auxiliary electrode 33 is lower than the resistance value of the first transparent electrode 31. Similarly, the resistance value of the second auxiliary electrode 34 is lower than the resistance value of the second transparent electrode 32. As the constituent material of the first auxiliary electrode 33 and the second auxiliary electrode 34, for example, silver, aluminum, copper, chromium and molybdenum can be cited. As the constituent material of the first auxiliary electrode 33 and the second auxiliary electrode 34, conductive ink can also be used. As the constituent material of the first auxiliary electrode 33 and the second auxiliary electrode 34, one of them can be used, or two or more of them can be used in combination. The first auxiliary electrode 33 and the second auxiliary electrode 34 can be formed, for example, by sputtering, evaporation, etc. The first auxiliary electrode 33 and the second auxiliary electrode 34 can also be formed by printing using conductive ink.

[0149] The average thickness of the first auxiliary electrode 33 and the second auxiliary electrode 34 is preferably 1 nm or more and 100 nm or less, respectively, independently. The average thickness of the first auxiliary electrode 33 and the second auxiliary electrode 34 is more preferably 5 nm or more and 50 nm or less.

[0150] Figure 5 FIG. 3 is a partial enlarged view of the first auxiliary electrode 33. Figure 5 As shown, in the first auxiliary electrode 33, the connection portion between the first frame body 331 and the first extraction portion 332 (at Figure 5 The contour line (indicated by symbols A1 and A2) is a convex curve on the side of the colored area AR. The curvature radius of the curve is set to be greater than 40 mm. The curvature radius can be measured and calculated by a known method.

[0151] Furthermore, the width of the first extraction portion 332 extending from the first frame body 331 toward the outside is preferably set to 10 mm or less.

[0152] In addition, the width of the first extraction portion 332 is set to a value obtained by measuring the width W1 of the entire first auxiliary electrode 33 at the position where the first extraction portion 332 is provided and subtracting the width W2 of the first frame body 331 from the obtained width W1 of the first auxiliary electrode 33. If the design value is known, the design value can be used as the width W2 of the first frame body 331. When the width of the first frame body 331 is unknown, the widths of a plurality of locations (for example, five locations) are measured at equal intervals, and the arithmetic mean of the measured values ​​can be used as the width W2 of the first frame body 331.

[0153] The width of at least the portion (front end portion) of the first frame 331 including the front end (one end) can be greater than 0.1 mm and less than 1.0 mm. Since the width of the front end portion is greater than 0.1 mm, the resistance can be reduced. Therefore, the coloring and color removal in the colored area AR can be performed without delay. Since the width of the front end portion is less than 1.0 mm, it is difficult to be viewed from the outside. Therefore, the first frame 331 is not conspicuous. Therefore, the aesthetics of the sunglasses 100 can be improved. The width of the front end portion can also be greater than 0.3 mm and less than 1.0 mm.

[0154] Figure 6 FIG. 3 is a partial enlarged view of the second auxiliary electrode 34. Similar to the first auxiliary electrode 33, in the second auxiliary electrode 34, the connection portion between the second frame body 341 and the second extraction portion 342 (at Figure 6 The contour line (indicated by symbols A3 and A4) is a convex curve on the colored area AR side. The curvature radius of the curve is preferably set to 40 mm or more.

[0155] Furthermore, the width of the second extraction portion 342 extending from the second frame body 341 toward the outside is preferably set to 10 mm or less.

[0156] The width W2 can be obtained by measuring the width W3 of the entire second auxiliary electrode 34 at the position where the second lead-out portion 342 is provided in the same manner as the width W1 described above, and subtracting the width W4 of the second frame body 341 from the obtained width W3 of the second auxiliary electrode 34 .

[0157] The width of at least the portion (front end portion) of the second frame 341 including the front end (one end) can be greater than 0.1 mm and less than 1.0 mm. Since the width of the front end portion is greater than 0.1 mm, the resistance can be reduced. Therefore, the coloring and color removal in the colored area AR can be performed without delay. Since the width of the front end portion is less than 1.0 mm, it is difficult to be visually recognized from the outside. Therefore, the second frame 341 is not conspicuous. Therefore, the aesthetics of the sunglasses 100 can be improved. The width of the front end portion can also be greater than 0.3 mm and less than 1.0 mm.

[0158] (Electrochromic layer)

[0159] like Figure 2 , Figure 3 As shown, the EC layer 35 includes: a first electrochromic layer 351 (first EC layer 351), stacked on the first transparent electrode 31; a second electrochromic layer 352 (second EC layer 352), stacked on the second transparent electrode 32; and an electrolyte layer 353 filled between the first EC layer 351 and the second EC layer 352.

[0160] (First electrochromic layer)

[0161] The first EC layer 351 is a layer that changes color, and contains a material that is colored by an oxidation reaction as a main material. Examples of the material that is colored by an oxidation reaction include polymers of radical polymerizable compounds having a triarylamine structure, bis acridane compounds, triphenylamine, benzidine, Prussian blue type complexes, and nickel oxide, which are known materials that show electrochromism and are used in EC elements.

[0162] Examples of the polymer of the radical polymerizable compound having a triarylamine structure include polymers described in JP-A No. 2016-45464 and JP-A No. 2020-138925.

[0163] As the material colored by oxidation reaction, these may be used alone or in combination of two or more.

[0164] The average thickness of the first EC layer 351 is preferably 0.1 μm or more and 30 μm or less. The average thickness of the first EC layer 351 is more preferably 0.4 μm or more and 10 μm or less.

[0165] (Second electrochromic layer)

[0166] The second EC layer 352 is a layer that changes color, and contains a material that is colored by a reduction reaction as a main material. Examples of the material that is colored by a reduction reaction include inorganic electrochromic compounds such as tungsten oxide, molybdenum oxide, iridium oxide, and titanium oxide, and organic electrochromic compounds such as viologen compounds and bipyridine compounds, which are known materials that show electrochromism and are used in EC elements.

[0167] As the material colored by reduction reaction, these may be used alone or in combination of two or more.

[0168] The color (color 1) colored by the oxidation reaction of the first EC layer 351 and the color (color 2) colored by the reduction reaction of the second EC layer 352 can be the same hue or different hues. When the color 1 and the color 2 are the same hue, the contrast can be improved by increasing the maximum color concentration. When the color 1 and the color 2 are different hues, the color of the EC element 30 becomes a mixed color of the color 1 and the color 2.

[0169] By coloring both the first EC layer 351 and the second EC layer 352, the redox dyes of the first EC layer 351 and the second EC layer 352 can be simultaneously colored. Therefore, the color development speed can be increased.

[0170] The average thickness of the second EC layer 352 is preferably 0.2 μm or more and 5.0 μm or less. The average thickness of the second EC layer 352 is more preferably 1.0 μm or more and 4.0 μm or less. If the average thickness of the second EC layer 352 is 0.2 μm or more, the color density can be improved. If the average thickness of the second EC layer 352 is 5.0 μm or less, the manufacturing cost can be suppressed. If the average thickness of the second EC layer 352 is 5.0 μm or less, it is less likely to cause a decrease in visibility due to coloring.

[0171] (Electrolyte layer)

[0172] The electrolyte layer 353 is filled between the first EC layer 351 and the second EC layer 352. The electrolyte layer 353 contains an electrolyte having ion conductivity.

[0173] 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 bases. The counter ions (anions) of the electrolyte include halogens, thiocyanate ions (SCN - ), chlorate ion (ClO3 - ), perchlorate ion (ClO4 - ), tetrafluoroborate ion (BF4 - ), hexafluorophosphate ion (PF6 - ), trifluoromethanesulfonate ion (CF3SO3 - ), trifluoroacetate ion (CF3COO - ), bis(fluorosulfonyl)imide (N(SO2F)2 - ).

[0174] As such an electrolyte, specifically, LiClO4, LiBF4, LiAsF6, LiPF6, LiCF3SO3, LiCF3COO, KCl, NaClO3, NaCl, NaBF4, NaSCN, KBF4, Mg(ClO4)2, Mg(BF4)2, etc. can be cited. As the electrolyte, one of them can be used, or two or more of them can be used in combination.

[0175] As the material of the electrolyte, an ionic liquid can also be used. Among ionic liquids, an organic ionic liquid has a molecular structure that shows liquid in a wide temperature range including room temperature, and is therefore easy to handle.

[0176] The average thickness of the electrolyte layer 353 is preferably 20 μm or more and 100 μm or less, more preferably 30 μm or more and 80 μm or less, and still more preferably 30 μm or more and 70 μm or less.

[0177] [Seal part]

[0178] The sealing portion 40 is disposed between the first substrate 11 and the second substrate 12, and divides the coloring region AR. The material of the sealing portion 40 is not particularly limited as long as it is a transparent insulating material. Examples of the material of the sealing portion 40 include resin materials such as acrylic resin and epoxy resin; inorganic oxides such as silicon oxide (SiO2), silicon oxynitride (SiON), and aluminum oxide (Al2O3).

[0179] The average thickness of the sealing portion 40 is adjusted according to the average thickness of the EC element 30. The average thickness of the sealing portion 40 is preferably 20 μm to 100 μm, more preferably 30 μm to 80 μm, and further preferably 40 μm to 60 μm.

[0180] In the EC sheet 150, in the cross section connecting the first lead-out portion 332 and the colored region AR, the distance from the end of the second transparent electrode 32 on the first lead-out portion 332 side to the colored region AR (in Figure 3 The thickness of the optical fiber (indicated by symbol L1) is greater than or equal to 0.01 mm and less than or equal to 1.0 mm.

[0181] In order to set the distance L1 within such a range, the second transparent electrode 32 may be processed so that the contour near the first take-out portion 332 is retreated toward the colored region AR. Thus, the possibility of a short circuit between the first conductive portion 51 provided in the first take-out portion 332 and the second transparent electrode 32 is reduced, and the first conductive portion 51 can be brought closer to the colored region AR. Therefore, the first take-out portion 332 can be reduced, and the first auxiliary electrode 33 is less conspicuous.

[0182] Similarly, in the cross section connecting the second extraction portion 342 and the colored region AR, the distance from the end of the first transparent electrode 31 on the second extraction portion 342 side to the colored region AR (at Figure 4 In the embodiment of the present invention, the distance L2 is preferably greater than or equal to 0.01 mm and less than or equal to 1.0 mm. In order to set the distance L2 within such a range, the first transparent electrode 31 may be processed so that the contour near the second extraction portion 342 is retreated toward the coloring area AR. As a result, the possibility of a short circuit between the second conductive portion 52 provided in the second extraction portion 342 and the first transparent electrode 31 is reduced, and the second conductive portion 52 can be brought closer to the coloring area AR. Therefore, the second extraction portion 342 can be reduced, and the second auxiliary electrode 34 is not easily conspicuous.

[0183] Here, the “cross section connecting the first extraction portion 332 and the colored region AR” is a cross section connecting the first extraction portion 332 and the colored region AR at the shortest distance. Figure 3 The cross section shown corresponds to this.

[0184] Furthermore, the “cross section connecting the second extraction portion 342 and the colored region AR” is a cross section connecting the second extraction portion 342 and the colored region AR at the shortest distance. Figure 4 The cross section shown corresponds to this.

[0185] <<Laminate, lens for spectacles>>

[0186] Figure 7 It is an explanatory diagram for explaining a method of manufacturing a lens using the EC sheet 150 .

[0187] First, if Figure 7 As shown in (a), the EC sheet 150 is bent according to the curvature of the target lens by performing a bending process on the EC sheet 150 under heating. The bending process is performed by, for example, press molding or vacuum molding.

[0188] Then, if Figure 7 As shown in (b), the bent EC sheet 150 is insert molded as an insert, and the lens component 119 is formed on the concave surface of the EC sheet 150 to obtain a laminate 160. The laminate 160 corresponds to the "laminate" in the present invention. The lens component 119 becomes the lens body 115 by performing the processing described below.

[0189] The lens member 119 has visible light transmittance. As the material of the lens member 119, a known thermoplastic resin as a material of an optical member can be used.

[0190] If the material of the lens component 119 is of the same type or the same as the main material of the substrate (the first substrate 11 or the second substrate 12) in contact with the lens component 119 in the EC sheet 150, it is easy to make the EC sheet 150 and the lens component 119 close together, so it is preferred. In addition, if the material of the substrate and the material of the lens component 119 are of the same type or the same, the refractive index difference between the substrate and the lens component 119 can be reduced, and the scattering or reflection of light at the interface between the EC sheet 150 and the lens component 119 can be suppressed. The refractive index difference between the substrate and the lens component 119 is preferably 0.2 or less, and more preferably 0.1 or less.

[0191] The thickness of the lens member 119 is preferably, for example, not less than 1.5 mm and not more than 20 mm. By setting the thickness of the lens member 119 within the above range, it is possible to achieve both high strength and light weight of the obtained lens.

[0192] Next, the surface of the lens component 119 is polished, and the surfaces of the EC sheet 150 and the lens component 119 are hard-coated and anti-reflected. Then, a through hole is formed in the sealing portion 40 at a position overlapping the first extraction portion 332 and the second extraction portion 342, and a conductive portion is formed in the through hole.

[0193] The conductive portion can be formed by a conductive paste filled in the through hole and a conductive tubular member inserted in the through hole. In addition, as long as it is formed in the through hole and can be electrically connected to the first auxiliary electrode 33 (first extraction portion 332) and the second auxiliary electrode 34 (second extraction portion 342), known materials can be appropriately applied.

[0194] Then, if Figure 7 As shown in (c), the laminate 160 is trimmed to have a shape corresponding to the frame 121 of the sunglasses 100. At this time, the trimming of the periphery of the first take-out portion 332 and the second take-out portion 342 is performed using, for example, a rotating cylindrical grinding wheel G.

[0195] By this processing, the lens 110 including the EC portion 111 obtained by cutting the EC sheet 150 along the outer periphery of the first auxiliary electrode 33 and the second auxiliary electrode 34 and the lens main body 115 laminated with the EC portion 111 can be obtained (see FIG. Figure 1 The obtained lens 110 corresponds to the "eyeglass lens" in the present invention.

[0196] The lens member 119 included in the laminate 160 is processed into a lens body 115 by trimming along the outer periphery of the first auxiliary electrode 33 and the second auxiliary electrode 34. The lens body 115 has a protruding portion 115a having the same shape as the first extraction portion 332 and the second extraction portion 342 in a plan view.

[0197] The obtained lens 110 is Figure 1 At this time, the first take-out portion 332 and the second take-out portion 342 of the EC portion 111 are electrically connected to the frame 120 via the conductive portions provided therein. In the present embodiment, the first take-out portion 332 and the second take-out portion 342 are electrically connected to the external terminals (not shown) provided on the temple portion 123 or the middle beam portion 122 of the frame 120, and are connected to the battery 126.

[0198] Thus, the sunglasses 100 can be obtained.

[0199] According to the EC sheet 150 having the above-described structure, the following effects can be obtained.

[0200] Figure 8 , Fig. 9 It is an explanatory diagram showing the effect of the auxiliary electrodes (first auxiliary electrode and second auxiliary electrode). Figure 8 This is the EC portion of the eyeglass lens manufactured by the above method using an EC sheet having no auxiliary electrode. Fig. 9 The EC portion (EC portion 111 ) of the eyeglass lens manufactured by the above-mentioned method using the above-mentioned EC sheet 150 is shown.

[0201] First, in Figure 8 In the EC section 111X shown, when a battery is connected to the first conductive section 51 and the second conductive section 52 electrically connected to the transparent electrodes (first transparent electrode, second transparent electrode) and a voltage is applied, current flows directly from the first conductive section 51 and the second conductive section 52 to the transparent electrodes.

[0202] At this time, the current easily flows on the path (indicated by symbol D1) connecting the first conductive portion 51 and the second conductive portion 52 at the shortest distance because the path is short and the resistance is small, and the current is not easy to flow on the path (indicated by symbol D2) connecting the first conductive portion 51 and the second conductive portion 52 in a circuitous manner relative to the path D1. As a result, in the area of ​​the colored area AR that overlaps with the path D2 and is far from the first conductive portion 51 and the second conductive portion 52, the color change is easily delayed compared to the area overlapping with the path D1.

[0203] In contrast, Fig. 9 When the EC sheet as a material has auxiliary electrodes (the first auxiliary electrode 33 and the second auxiliary electrode 34 ) as in the EC section 111 shown in the figure, the operation is performed as follows.

[0204] In the first auxiliary electrode 33, when a voltage is applied to the first extraction portion 332 via the first conductive portion 51, current first flows from the first extraction portion 332 toward the first frame body 331, and then flows from the first auxiliary electrode 33 toward the first transparent electrode 31. This current is represented by symbol C1.

[0205] Similarly, in the second auxiliary electrode 34, when a voltage is applied from an external power source to the second lead-out portion 342 via the second conductive portion 52, current first flows from the second lead-out portion 342 to the second frame body 341, and then from the second auxiliary electrode 34 to the second transparent electrode 32. This current is represented by symbol C2.

[0206] At this time, the first auxiliary electrode 33 covers most of the width direction at one end side of the first transparent electrode 31, and the second auxiliary electrode 34 covers most of the width direction at the other end side of the second transparent electrode 32. Therefore, in the EC portion 111, when a voltage is applied, the timing of power-on is easily made uniform in the entire coloring area AR via the auxiliary electrodes, thereby suppressing the delay of color change.

[0207] Furthermore, the first auxiliary electrode 33 and the second auxiliary electrode 34 are provided at the peripheral portion of the colored region AR, and are not present in the center of the colored region AR. Therefore, the color development of the colored region AR is not hindered.

[0208] Furthermore, in the EC sheet 150, Figure 3 The distance L1 shown is set to be not less than 0.01 mm and not more than 1.0 mm. Therefore, the first conductive portion 51 can be formed closer to the colored region AR side, and the first lead-out portion 332 can be correspondingly reduced, making the first auxiliary electrode 33 less conspicuous.

[0209] According to the electrochromic sheet having the above structure, color development and color elimination can be performed without delay by having the first auxiliary electrode 33 and the second auxiliary electrode 34. In addition, by designing the peripheral structure of the colored region AR, the auxiliary electrodes are less conspicuous, and the EC sheet has excellent appearance design.

[0210] Furthermore, according to the laminated body, the eyeglass lens, and the eyeglasses having the above-described structure, color development and color elimination can be performed without delay by including the electrochromic sheet.

[0211] In addition, in this embodiment, the sunglasses 100 are shown as an example of glasses, but the present invention is not limited to this. The lens 110 may be applied to goggles for protecting eyes from wind, rain, dust, medicine, etc., for example.

[0212] In the present embodiment, the EC layer 35 includes the first EC layer 351 and the second EC layer 352, but the present invention is not limited thereto. The effects of the present invention can be achieved even if the EC layer 35 includes only one of the first EC layer 351 and the second EC layer 352.

[0213] The preferred embodiment of the present invention has been described above with reference to the accompanying drawings, but the present invention is not limited to this embodiment. The various shapes or combinations of the components shown in the above examples are examples, and various changes can be made according to design, specifications, etc. without departing from the scope of the present invention.

[0214] (Second embodiment)

[0215] The transparent electrode used in the structure of Patent Document 1 is formed using a material having high conductivity and high visible light transmittance. As a material for the transparent electrode, oxides such as ITO (Indium Tin Oxide) are known.

[0216] On the other hand, the above materials have higher resistance than metal materials. Therefore, in the electrochromic layer sandwiched by the transparent electrodes made of ITO, there are areas where current is easily conducted and areas where it is not easily conducted, and the discoloration (coloration, color loss) of the electrochromic layer is prone to color unevenness.

[0217] The present invention has been made in view of such a situation, and an object thereof is to provide an electrochromic sheet that can develop and eliminate color without delay. Another object thereof is to provide a laminated body having such an electrochromic sheet, a lens for spectacles, and spectacles having the lens for spectacles.

[0218] In order to solve the above problems, the structure of the auxiliary electrode that supplements the conductivity of the transparent electrode has been studied. Generally, the auxiliary electrode is formed using a metal material with a lower resistance than the material of the transparent electrode. By setting the structure using the auxiliary electrode, the above-mentioned color change delay problem can be solved.

[0219] On the other hand, in the eyeglass lens using the electrochromic sheet as a material, unlike the ordinary eyeglass lens, the portion corresponding to the electrode is often provided protrudingly. Therefore, when the eyeglass lens is ground, the processing around the protruding portion provided with the electrode becomes complicated, resulting in reduced work efficiency.

[0220] In order to solve the above-mentioned problems, one aspect of the present invention includes the following aspects.

[0221] (Solution 1)

[0222] An electrochromic sheet, comprising:

[0223] 1st substrate;

[0224] 2nd substrate;

[0225] an electrochromic element, sandwiched by the first substrate and the second substrate; and

[0226] a sealing portion, which is sandwiched by the first substrate and the second substrate and defines a coloring area between the first substrate and the second substrate;

[0227] The electrochromic element has:

[0228] A first transparent electrode is disposed on the first substrate side;

[0229] a first auxiliary electrode disposed around the colored region and electrically connected to the first transparent electrode;

[0230] A second transparent electrode is disposed on the second substrate side;

[0231] a second auxiliary electrode disposed around the colored region and electrically connected to the second transparent electrode; and

[0232] The electrochromic layer is sandwiched between the first transparent electrode and the second transparent electrode, is disposed in the coloring region, and is colored by application of a voltage.

[0233] The first auxiliary electrode has:

[0234] a first band-shaped frame surrounding a portion of the electrochromic layer; and

[0235] a first taking-out portion protruding from the first frame toward the outside of the colored area,

[0236] The contour line of the connection portion between the first frame and the first taking-out portion is a convex curve on the colored region side.

[0237] The curvature radius of the curve is greater than 40 mm.

[0238] (Solution 2)

[0239] The electrochromic sheet according to Scheme 1, wherein:

[0240] A width of the first removal portion from the first frame body toward the outside is 10 mm or less.

[0241] (Solution 3)

[0242] The electrochromic sheet according to solution 1 or 2, wherein:

[0243] The second auxiliary electrode includes: a strip-shaped second frame body surrounding a portion of the electrochromic layer; and a second lead-out portion protruding from the second frame body toward the outside of the coloring region.

[0244] The contour line of the connection portion between the second frame and the second taking-out portion is a convex curve on the colored region side.

[0245] The curvature radius of the curve is greater than 40 mm.

[0246] (Solution 4)

[0247] The electrochromic sheet according to Scheme 3, wherein:

[0248] A width of the second removal portion from the second frame body toward the outside is 10 mm or less.

[0249] (Scheme 5)

[0250] The electrochromic sheet according to Scheme 1, wherein:

[0251] The electrochromic layer has:

[0252] A first electrochromic layer, stacked on the first transparent electrode;

[0253] a second electrochromic layer stacked on the second transparent electrode; and

[0254] an electrolyte layer filled between the first electrochromic layer and the second electrochromic layer,

[0255] The first electrochromic layer includes a material that exhibits coloration through an oxidation reaction.

[0256] The second electrochromic layer includes a material that exhibits coloration through a reduction reaction.

[0257] (Scheme 6)

[0258] A laminated body, comprising:

[0259] The electrochromic sheet described in Scheme 1; and

[0260] The lens component is laminated with the electrochromic sheet.

[0261] (Scheme 7)

[0262] A lens for spectacles, comprising:

[0263] An electrochromic part obtained by cutting the electrochromic sheet according to solution 1 along the peripheries of the first auxiliary electrode and the second auxiliary electrode; and

[0264] The lens body is laminated with the electrochromic part.

[0265] The lens body has a protruding portion having the same shape as the first extraction portion in a plan view.

[0266] (Scheme 8)

[0267] A pair of glasses, comprising:

[0268] The eyeglass lens according to claim 7; and

[0269] Spectacle frames, holding the spectacles with lenses,

[0270] The first take-out portion is electrically connected to the lens frame.

[0271] According to the present invention, an electrochromic sheet capable of developing and eliminating color without delay can be provided, and a laminated body having such an electrochromic sheet, a lens for spectacles, and spectacles having the lens for spectacles can be provided.

[0272] <<Laminate, lens for spectacles>>

[0273] A method for manufacturing a lens using the EC sheet 150 will be described.

[0274] First, if Figure 7 As shown in (a), the EC sheet 150 is bent according to the curvature of the target lens by performing a bending process on the EC sheet 150 under heating. The bending process is performed by, for example, press molding or vacuum molding.

[0275] Then, if Figure 7 As shown in (b), the bent EC sheet 150 is insert molded as an insert, and the lens component 119 is formed on the concave surface of the EC sheet 150 to obtain a laminate 160. The laminate 160 corresponds to the "laminate" in the present invention. The lens component 119 becomes the lens body 115 by performing the processing described below.

[0276] The lens member 119 has visible light transmittance. As the material of the lens member 119, a known thermoplastic resin as a material of an optical member can be used.

[0277] If the material of the lens component 119 is of the same type or the same as the main material of the substrate (the first substrate 11 or the second substrate 12) in contact with the lens component 119 in the EC sheet 150, it is easy to make the EC sheet 150 and the lens component 119 close together, so it is preferred. In addition, if the material of the substrate and the material of the lens component 119 are of the same type or the same, the refractive index difference between the substrate and the lens component 119 can be reduced, and the scattering or reflection of light at the interface between the EC sheet 150 and the lens component 119 can be suppressed. The refractive index difference between the substrate and the lens component 119 is preferably 0.2 or less, and more preferably 0.1 or less.

[0278] The thickness of the lens member 119 is preferably, for example, not less than 1.5 mm and not more than 20 mm. By setting the thickness of the lens member 119 within the above range, it is possible to achieve both high strength and light weight of the obtained lens.

[0279] Next, the surface of the lens component 119 is polished, and the surfaces of the EC sheet 150 and the lens component 119 are hard-coated and anti-reflected. Then, a through hole is formed in the sealing portion 40 at a position overlapping the first extraction portion 332 and the second extraction portion 342, and a conductive portion is formed in the through hole.

[0280] The conductive portion can be formed by a conductive paste filled in the through hole and a conductive tubular member inserted in the through hole. In addition, as long as it is formed in the through hole and can be electrically connected to the first auxiliary electrode 33 (first extraction portion 332) and the second auxiliary electrode 34 (second extraction portion 342), known materials can be appropriately applied.

[0281] Then, if Figure 7 As shown in (c), the laminate 160 is trimmed to a shape corresponding to the frame 121 of the sunglasses 100. At this time, the trimming of the periphery of the first take-out portion 332 and the second take-out portion 342 is performed using, for example, a rotating cylindrical grinding wheel G. The curvature radius of the smallest grinding wheel among the grinding wheels G used for trimming is approximately 40 mm.

[0282] By this processing, the lens 110 including the EC portion 111 obtained by cutting the EC sheet 150 along the outer periphery of the first auxiliary electrode 33 and the second auxiliary electrode 34 and the lens main body 115 laminated with the EC portion 111 can be obtained (see FIG. Figure 1 The obtained lens 110 corresponds to the "eyeglass lens" in the present invention.

[0283] The lens member 119 included in the laminate 160 is processed into a lens body 115 by trimming along the outer periphery of the first auxiliary electrode 33 and the second auxiliary electrode 34. The lens body 115 has a protruding portion 115a having the same shape as the first extraction portion 332 and the second extraction portion 342 in a plan view.

[0284] The obtained lens 110 is Figure 1 At this time, the first take-out portion 332 and the second take-out portion 342 of the EC portion 111 are electrically connected to the frame 120 via the conductive portions provided therein. In the present embodiment, the first take-out portion 332 and the second take-out portion 342 are electrically connected to the external terminals (not shown) provided on the temple portion 123 or the middle beam portion 122 of the frame 120, and are connected to the battery 126.

[0285] Thus, the sunglasses 100 can be obtained.

[0286] According to the EC sheet 150 having the above-described structure, the following effects can be obtained.

[0287] First, in Figure 8In the EC section 111X shown, when a battery is connected to the first conductive section 51 and the second conductive section 52 electrically connected to the transparent electrodes (first transparent electrode, second transparent electrode) and a voltage is applied, current flows directly from the first conductive section 51 and the second conductive section 52 to the transparent electrodes.

[0288] At this time, the current easily flows on the path (indicated by symbol D1) connecting the first conductive portion 51 and the second conductive portion 52 at the shortest distance because the path is short and the resistance is small, and the current is not easy to flow on the path (indicated by symbol D2) connecting the first conductive portion 51 and the second conductive portion 52 in a circuitous manner relative to the path D1. As a result, in the area of ​​the colored area AR that overlaps with the path D2 and is far from the first conductive portion 51 and the second conductive portion 52, the color change is easily delayed compared to the area overlapping with the path D1.

[0289] In contrast, Fig. 9 When the EC sheet as a material has auxiliary electrodes (the first auxiliary electrode 33 and the second auxiliary electrode 34 ) as in the EC section 111 shown in the figure, the operation is performed as follows.

[0290] In the first auxiliary electrode 33, when a voltage is applied to the first extraction portion 332 via the conductive portion 51, current first flows from the first extraction portion 332 toward the first frame body 331, and then flows from the first auxiliary electrode 33 toward the first transparent electrode 31. This current is represented by symbol C1.

[0291] Similarly, in the second auxiliary electrode 34, when a voltage is applied from an external power source to the second lead-out portion 342 via the second conductive portion 52, current first flows from the second lead-out portion 342 to the second frame body 341, and then from the second auxiliary electrode 34 to the second transparent electrode 32. This current is represented by symbol C2.

[0292] At this time, the first auxiliary electrode 33 covers most of the width direction at one end side of the first transparent electrode 31, and the second auxiliary electrode 34 covers most of the width direction at the other end side of the second transparent electrode 32. Therefore, in the EC portion 111, when a voltage is applied, the timing of power-on is easily made uniform in the entire coloring area AR via the auxiliary electrodes, thereby suppressing the delay of color change.

[0293] Furthermore, the first auxiliary electrode 33 and the second auxiliary electrode 34 are provided at the peripheral portion of the colored region AR, and are not present in the center of the colored region AR. Therefore, the color development of the colored region AR is not hindered.

[0294] Furthermore, in the EC sheet 150, Figure 5 , Figure 6The curvature radius of the positions indicated by the symbols A1 to A4 is set to be 40 mm or more, which is equal to or greater than the curvature radius of the grinding wheel G used for dressing. Therefore, the contours of the first auxiliary electrode 33 and the second auxiliary electrode 34 can be drawn by the grinding wheel G used for dressing, and processing can be easily performed according to the design without cutting with an electric drill.

[0295] According to the electrochromic sheet having the structure shown above, color development and color elimination can be performed without delay by having the first auxiliary electrode 33 and the second auxiliary electrode 34. Furthermore, by setting the shape of the periphery of the extraction portion of the first auxiliary electrode 33 and the second auxiliary electrode 34 to a curve with a curvature radius of more than 40 mm, it is easy to process into a desired lens shape.

[0296] Furthermore, according to the laminated body, the eyeglass lens, and the eyeglasses having the above-described structure, color development and color elimination can be performed without delay by including the electrochromic sheet.

[0297] (Third embodiment)

[0298] The transparent electrode used in the structure of Patent Document 1 is formed using a material having high conductivity and high visible light transmittance. As a material for the transparent electrode, oxides such as ITO (Indium Tin Oxide) are known.

[0299] On the other hand, the above materials have higher resistance than metal materials. Therefore, in the electrochromic layer sandwiched by the transparent electrodes made of ITO, there are areas where current is easily conducted and areas where it is not easily conducted, and the discoloration (coloration, color loss) of the electrochromic layer is prone to color unevenness.

[0300] The present invention has been made in view of such a situation, and an object thereof is to provide an electrochromic sheet that can develop and eliminate color without delay. Another object thereof is to provide a laminated body having such an electrochromic sheet, a lens for spectacles, and spectacles having the lens for spectacles.

[0301] In order to solve the above problems, the structure of the auxiliary electrode that supplements the conductivity of the transparent electrode has been studied. Generally, the auxiliary electrode is formed using a metal material with a lower resistance than the material of the transparent electrode. By setting the structure using the auxiliary electrode, the above-mentioned color change delay problem can be solved.

[0302] On the other hand, when studying the auxiliary electrode, it was found that the expected function of the auxiliary electrode could not be fully exerted depending on the shape of the auxiliary electrode formed, and color unevenness occurred. Based on this finding, intensive studies were conducted to complete the present invention.

[0303] In order to solve the above-mentioned problems, one aspect of the present invention includes the following aspects.

[0304] (Solution 1)

[0305] An electrochromic sheet, comprising:

[0306] 1st substrate;

[0307] 2nd substrate;

[0308] an electrochromic element, sandwiched by the first substrate and the second substrate; and

[0309] a sealing portion, which is sandwiched by the first substrate and the second substrate and defines a coloring area between the first substrate and the second substrate;

[0310] The electrochromic element has:

[0311] A first transparent electrode is disposed on the first substrate side;

[0312] a first auxiliary electrode disposed around the colored region and electrically connected to the first transparent electrode;

[0313] A second transparent electrode is disposed on the second substrate side;

[0314] a second auxiliary electrode disposed around the colored region and electrically connected to the second transparent electrode; and

[0315] The electrochromic layer is sandwiched between the first transparent electrode and the second transparent electrode, is disposed in the coloring region, and is colored by application of a voltage.

[0316] The first auxiliary electrode includes: a first band-shaped frame body surrounding a portion of the electrochromic layer; and a first lead-out portion protruding from the first frame body toward the outside of the coloring region.

[0317] The second auxiliary electrode includes: a strip-shaped second frame body surrounding a portion of the electrochromic layer; and a second lead-out portion protruding from the second frame body toward the outside of the coloring region.

[0318] When the smallest virtual rectangle among the rectangles circumscribing the colored area in a top view is assumed,

[0319] The first taking-out portion is provided at one end side in the direction of one side of the virtual rectangle,

[0320] The second taking-out portion is provided at the other end side in the direction of the one side,

[0321] The first take-out portion and the second take-out portion are provided apart from each other in the direction of the one side by 40% or more of the length of the one side.

[0322] (Solution 2)

[0323] The electrochromic sheet according to Scheme 1, wherein:

[0324] The first take-out portion is provided in a region from one end of the side to 30% of the length.

[0325] The second take-out portion is provided in a region extending from the other end of the one side to 30% of the length.

[0326] (Solution 3)

[0327] The electrochromic sheet according to Scheme 2, wherein:

[0328] The first take-out portion is provided in a region from the one end to 10% of the length.

[0329] The second take-out portion is provided in a region from the other end to 10% of the length.

[0330] (Solution 4)

[0331] The electrochromic sheet according to Scheme 1, wherein:

[0332] The first extraction unit and the second extraction unit are provided in a region extending from one end to the center of the virtual rectangle in a direction perpendicular to the one side of the virtual rectangle.

[0333] (Scheme 5)

[0334] The electrochromic sheet according to Scheme 1, wherein:

[0335] The electrochromic layer has:

[0336] A first electrochromic layer, stacked on the first transparent electrode;

[0337] a second electrochromic layer stacked on the second transparent electrode; and

[0338] an electrolyte layer filled between the first electrochromic layer and the second electrochromic layer,

[0339] The first electrochromic layer includes a material that exhibits coloration through an oxidation reaction.

[0340] The second electrochromic layer includes a material that exhibits coloration through a reduction reaction.

[0341] (Scheme 6)

[0342] A laminated body, comprising:

[0343] The electrochromic sheet described in Scheme 1; and

[0344] The lens component is laminated with the electrochromic sheet.

[0345] (Scheme 7)

[0346] A lens for spectacles, comprising:

[0347] An electrochromic part obtained by cutting the electrochromic sheet according to solution 1 along the peripheries of the first auxiliary electrode and the second auxiliary electrode; and

[0348] The lens body is laminated with the electrochromic part.

[0349] The lens body has a protruding portion having the same shape as the first extraction portion and the second extraction portion in a plan view.

[0350] (Scheme 8)

[0351] A pair of glasses, comprising:

[0352] The eyeglass lens according to claim 7; and

[0353] Spectacle frames, holding the spectacles with lenses,

[0354] The first take-out portion and the second take-out portion are electrically connected to the mirror frame.

[0355] According to the present invention, an electrochromic sheet capable of developing and eliminating color without delay can be provided, and a laminated body having such an electrochromic sheet, a lens for spectacles, and spectacles having the lens for spectacles can be provided.

[0356] Fig.10 is a top view of the EC sheet 150. Fig.10 As shown, when the smallest rectangle (virtual rectangle R) among the rectangles circumscribing the colored area AR in a plan view is assumed, the first auxiliary electrode 33 is provided at one end side in the direction of one side of the virtual rectangle R, and the second auxiliary electrode 34 is provided at one end side in the direction of one side. Fig.10 In the example, the long side of the virtual rectangle R is equivalent to "one side of the virtual rectangle R". Fig.10 In the figure, “the direction of one side” refers to the length direction of the virtual rectangle R, and “the direction perpendicular to one side” refers to the width direction of the virtual rectangle R.

[0357] The first extraction portion 332 is preferably provided in a region AR1 from one end R1 in the length direction LD of the virtual rectangle R to 30% of the length of the long side. Similarly, the second extraction portion 342 is preferably provided in a region AR2 from the other end R2 in the length direction of the virtual rectangle R to 30% of the length of the long side. That is, when the length of one side of the virtual rectangle R (here, the length in the length direction) is L, the first extraction portion 332 and the second extraction portion 342 are provided at positions separated by more than 0.4L. The first extraction portion 332 and the second extraction portion 342 are preferably provided at positions separated by more than 0.6L, and more preferably provided at positions separated by more than 0.8L.

[0358] Furthermore, the region AR1 is preferably a region from one end R1 to 10% of the length of the long side, and the region AR2 is preferably a region from the other end R2 to 10% of the length of the long side.

[0359] Furthermore, the first extraction portion 332 and the second extraction portion 342 are preferably provided in a region from one end in the width direction SD to the center (50% of the entire width direction) of the virtual rectangle R. The first extraction portion 332 and the second extraction portion 342 are more preferably provided in a region from one end in the width direction SD of the virtual rectangle R to 20% to 50% of the entire width direction.

[0360] (Electrochromic layer)

[0361] like Figure 2 , Figure 3 As shown, the EC layer 35 includes: a first electrochromic layer 351 (first EC layer 351), stacked on the first transparent electrode 31; a second electrochromic layer 352 (second EC layer 352), stacked on the second transparent electrode 32; and an electrolyte layer 353 filled between the first EC layer 351 and the second EC layer 352.

[0362] (First electrochromic layer)

[0363] The first EC layer 351 is a layer that changes color, and contains a material that is colored by an oxidation reaction as a main material. Examples of the material that is colored by an oxidation reaction include polymers of radical polymerizable compounds having a triarylamine structure, bisacridone compounds, triphenylamine, benzidine, Prussian blue type complexes, and nickel oxide, which are known materials that show electrochromism and are used in EC elements.

[0364] Examples of the polymer of the radically polymerizable compound having a triarylamine structure include polymers described in JP-A-2016-45464 and JP-A-2020-138925.

[0365] As the material colored by oxidation reaction, these may be used alone or in combination of two or more.

[0366] The average thickness of the first EC layer 351 is preferably 0.1 μm or more and 30 μm or less. The average thickness of the first EC layer 351 is more preferably 0.4 μm or more and 10 μm or less.

[0367] (Second electrochromic layer)

[0368] The second EC layer 352 is a layer that changes color, and contains a material that is colored by a reduction reaction as a main material. Examples of the material that is colored by a reduction reaction include inorganic electrochromic compounds such as tungsten oxide, molybdenum oxide, iridium oxide, and titanium oxide, and organic electrochromic compounds such as viologen compounds and bipyridine compounds, which are known materials that show electrochromism and are used in EC elements.

[0369] As the material colored by reduction reaction, these may be used alone or in combination of two or more.

[0370] The color (color 1) colored by the oxidation reaction of the first EC layer 351 and the color (color 2) colored by the reduction reaction of the second EC layer 352 can be the same hue or different hues. When the color 1 and the color 2 are the same hue, the contrast can be improved by increasing the maximum color concentration. When the color 1 and the color 2 are different hues, the color of the EC element 30 becomes a mixed color of the color 1 and the color 2.

[0371] By coloring both the first EC layer 351 and the second EC layer 352, the redox dyes of the first EC layer 351 and the second EC layer 352 can be simultaneously colored. Therefore, the color development speed can be increased.

[0372] The average thickness of the second EC layer 352 is preferably 0.2 μm or more and 5.0 μm or less. The average thickness of the second EC layer 352 is more preferably 1.0 μm or more and 4.0 μm or less. If the average thickness of the second EC layer 352 is 0.2 μm or more, the color density can be improved. If the average thickness of the second EC layer 352 is 5.0 μm or less, the manufacturing cost can be suppressed. If the average thickness of the second EC layer 352 is 5.0 μm or less, it is less likely to cause a decrease in visibility due to coloring.

[0373] (Electrolyte layer)

[0374] The electrolyte layer 353 is filled between the first EC layer 351 and the second EC layer 352. The electrolyte layer 353 contains an electrolyte having ion conductivity.

[0375] 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 bases. The counter ions (anions) of the electrolyte include halogens, thiocyanate ions (SCN - ), chlorate ion (ClO3 - ), perchlorate ion (ClO4 - ), tetrafluoroborate ion (BF4 - ), hexafluorophosphate ion (PF6 - ), trifluoromethanesulfonate ion (CF3SO3 - ), trifluoroacetate ion (CF3COO - ), bis(fluorosulfonyl)imide (N(SO2F)2 - ).

[0376] As such an electrolyte, specifically, LiClO4, LiBF4, LiAsF6, LiPF6, LiCF3SO3, LiCF3COO, KCl, NaClO3, NaCl, NaBF4, NaSCN, KBF4, Mg(ClO4)2, Mg(BF4)2, etc. can be cited. As the electrolyte, one of them can be used, or two or more of them can be used in combination.

[0377] As the material of the electrolyte, an ionic liquid can also be used. Among ionic liquids, an organic ionic liquid has a molecular structure that shows liquid in a wide temperature range including room temperature, and is therefore easy to handle.

[0378] The average thickness of the electrolyte layer 353 is preferably 20 μm or more and 100 μm or less, more preferably 30 μm or more and 80 μm or less, and still more preferably 30 μm or more and 70 μm or less.

[0379] [Seal part]

[0380] The sealing portion 40 is disposed between the first substrate 11 and the second substrate 12, and divides the coloring region AR. The material of the sealing portion 40 is not particularly limited as long as it is a transparent insulating material. Examples of the material of the sealing portion 40 include resin materials such as acrylic resin and epoxy resin; inorganic oxides such as silicon oxide (SiO2), silicon oxynitride (SiON), and aluminum oxide (Al2O3).

[0381] The average thickness of the sealing portion 40 is adjusted according to the average thickness of the EC element 30. The average thickness of the sealing portion 40 is preferably 20 μm to 100 μm, more preferably 30 μm to 80 μm, and further preferably 40 μm to 60 μm.

[0382] <<Laminate, lens for spectacles>>

[0383] Fig.11 It is an explanatory diagram for explaining a method of manufacturing a lens using the EC sheet 150 .

[0384] First, if Fig.11 As shown in (a), the EC sheet 150 is bent according to the curvature of the target lens by performing a bending process on the EC sheet 150 under heating. The bending process is performed by, for example, press molding or vacuum molding.

[0385] Then, if Fig.11 As shown in (b), the bent EC sheet 150 is insert molded as an insert, and the lens component 119 is formed on the concave surface of the EC sheet 150 to obtain a laminate 160. The laminate 160 corresponds to the "laminate" in the present invention. The lens component 119 becomes the lens body 115 by performing the processing described below.

[0386] The lens member 119 has visible light transmittance. As the material of the lens member 119, a known thermoplastic resin as a material of an optical member can be used.

[0387] If the material of the lens component 119 is of the same type or the same as the main material of the substrate (the first substrate 11 or the second substrate 12) in contact with the lens component 119 in the EC sheet 150, it is easy to make the EC sheet 150 and the lens component 119 close together, so it is preferred. In addition, if the material of the substrate and the material of the lens component 119 are of the same type or the same, the refractive index difference between the substrate and the lens component 119 can be reduced, and the scattering or reflection of light at the interface between the EC sheet 150 and the lens component 119 can be suppressed. The refractive index difference between the substrate and the lens component 119 is preferably 0.2 or less, and more preferably 0.1 or less.

[0388] The thickness of the lens member 119 is preferably, for example, not less than 1.5 mm and not more than 20 mm. By setting the thickness of the lens member 119 within the above range, it is possible to achieve both high strength and light weight of the obtained lens.

[0389] Next, the surface of the lens component 119 is polished, and the surfaces of the EC sheet 150 and the lens component 119 are hard-coated and anti-reflected. Then, a through hole is formed in the sealing portion 40 at a position overlapping the first extraction portion 332 and the second extraction portion 342, and a conductive portion is formed in the through hole.

[0390] The conductive portion can be formed by a conductive paste filled in the through hole and a conductive tubular member inserted in the through hole. In addition, as long as it is formed in the through hole and can be electrically connected to the first auxiliary electrode 33 (first extraction portion 332) and the second auxiliary electrode 34 (second extraction portion 342), known materials can be appropriately applied.

[0391] Then, if Fig.11 As shown in (c), the laminate 160 is trimmed to have a shape corresponding to the frame 121 of the sunglasses 100. At this time, the trimming of the periphery of the first take-out portion 332 and the second take-out portion 342 is performed using, for example, a rotating cylindrical grinding wheel G.

[0392] By this processing, the lens 110 including the EC portion 111 obtained by cutting the EC sheet 150 along the outer periphery of the first auxiliary electrode 33 and the second auxiliary electrode 34 and the lens main body 115 laminated with the EC portion 111 can be obtained (see FIG. Figure 1 The obtained lens 110 corresponds to the "eyeglass lens" in the present invention.

[0393] The lens member 119 included in the laminate 160 is processed into a lens body 115 by trimming along the outer periphery of the first auxiliary electrode 33 and the second auxiliary electrode 34. The lens body 115 has a protruding portion 115a having the same shape as the first extraction portion 332 and the second extraction portion 342 in a plan view.

[0394] The obtained lens 110 is Figure 1 At this time, the first take-out portion 332 and the second take-out portion 342 of the EC portion 111 are electrically connected to the frame 120 via the conductive portions provided therein. In the present embodiment, the first take-out portion 332 and the second take-out portion 342 are electrically connected to the external terminals (not shown) provided on the temple portion 123 or the middle beam portion 122 of the frame 120, and are connected to the battery 126.

[0395] Thus, the sunglasses 100 can be obtained.

[0396] According to the EC sheet 150 having the above-described structure, the following effects can be obtained.

[0397] Figure 12 to Figure 14 It is an explanatory diagram showing the effect of the auxiliary electrodes (first auxiliary electrode and second auxiliary electrode). Fig.12 This is the EC portion of the eyeglass lens manufactured by the above method using an EC sheet having no auxiliary electrode. Fig.13 This is the EC portion of the eyeglass lens manufactured by the above method using the EC sheet having the auxiliary electrode with the lead-out portions close to each other. Fig.14The EC portion (EC portion 111 ) of the eyeglass lens manufactured by the above-mentioned method using the above-mentioned EC sheet 150 is shown.

[0398] First, in Fig.12 In the EC section 111X shown, when a battery is connected to the first conductive section 51 and the second conductive section 52 electrically connected to the transparent electrodes (first transparent electrode, second transparent electrode) and a voltage is applied, current flows directly from the first conductive section 51 and the second conductive section 52 to the transparent electrodes.

[0399] At this time, the current easily flows on the path (indicated by symbol D1) connecting the first conductive portion 51 and the second conductive portion 52 at the shortest distance because the path is short and the resistance is small, and the current is not easy to flow on the path (indicated by symbol D2) connecting the first conductive portion 51 and the second conductive portion 52 in a circuitous manner relative to the path D1. As a result, in the area of ​​the colored area AR that overlaps with the path D2 and is far from the first conductive portion 51 and the second conductive portion 52, the color change is easily delayed compared to the area overlapping with the path D1.

[0400] And, if Fig.13 When the auxiliary electrode lead-out portions are arranged close to each other without being separated by more than 40% of the length in the longitudinal direction of the virtual rectangle R, as in the EC portion 111Y shown in the figure, the operation is as follows.

[0401] When a battery is connected to the conductive portions 51 and 52 provided in each extraction portion and a voltage is applied, in the first auxiliary electrode 33Y, current flows from the first extraction portion 332Y toward the first frame body 331Y, and current flows from the first frame body 331Y toward the first transparent electrode 31. In addition, in the second auxiliary electrode 34Y, current flows from the second extraction portion 342Y toward the second frame body 341Y, and current flows from the second frame body 341Y toward the second transparent electrode 32. Such current is represented by symbol Y1.

[0402] On the other hand, in the first auxiliary electrode 33Y, current is also supplied from the first frame body 331Y near the first lead-out portion 332Y to the first transparent electrode 31. Similarly, in the second auxiliary electrode 34Y, current is also supplied from the second frame body 341Y near the second lead-out portion 342Y to the second transparent electrode 32. Such current is represented by symbol Y2.

[0403] In the EC portion 111Y, since the extraction portions are close to each other, the current Y1 flows more easily than the current Y2. As a result, in the colored region AR, the color change due to the current Y1 is dominant, and the color change due to the current Y2 is likely to be delayed.

[0404] In contrast, Fig.14When the EC sheet as a material has auxiliary electrodes (first auxiliary electrode 33 and second auxiliary electrode 34) and the extraction portions of the auxiliary electrodes are separated from each other by more than 40% of the length of the long side in the longitudinal direction of the virtual rectangle R, as shown in the EC portion 111, the operation is as follows.

[0405] In the first auxiliary electrode 33, when a voltage is applied to the first extraction portion 332 via the conductive portion 51, current first flows from the first extraction portion 332 toward the first frame body 331, and then flows from the first auxiliary electrode 33 toward the first transparent electrode 31. This current is represented by symbol C1.

[0406] Similarly, in the second auxiliary electrode 34, when a voltage is applied from an external power source to the second lead-out portion 342 via the second conductive portion 52, current first flows from the second lead-out portion 342 to the second frame body 341, and then from the second auxiliary electrode 34 to the second transparent electrode 32. This current is represented by symbol C2.

[0407] In the EC portion 111 , since the extraction portions are appropriately separated from each other, the current C1 and the current C2 flow easily and equally. As a result, in the colored region AR, the color change by the current C1 and the color change by the current C2 are less likely to be delayed.

[0408] At this time, the first auxiliary electrode 33 covers most of the width direction at one end side of the first transparent electrode 31, and the second auxiliary electrode 34 covers most of the width direction at the other end side of the second transparent electrode 32. Therefore, in the EC portion 111, when a voltage is applied, the timing of power-on is easily made uniform in the entire coloring area AR via the auxiliary electrodes, thereby suppressing the delay of color change.

[0409] Furthermore, the first auxiliary electrode 33 and the second auxiliary electrode 34 are provided at the peripheral portion of the colored region AR, and are not present in the center of the colored region AR. Therefore, the color development of the colored region AR is not hindered.

[0410] According to the electrochromic sheet having the above-described structure, color development and color elimination can be performed without delay by including the first auxiliary electrode 33 and the second auxiliary electrode 34 .

[0411] Furthermore, according to the laminated body, the eyeglass lens, and the eyeglasses having the above-described structure, color development and color elimination can be performed without delay by including the electrochromic sheet.

[0412] (Fourth embodiment)

[0413] The transparent electrode used in the structure of Patent Document 1 is formed using a material having high conductivity and high visible light transmittance. As a material for the transparent electrode, oxides such as ITO (Indium Tin Oxide) are known.

[0414] On the other hand, the above materials have higher resistance than metal materials. Therefore, in the electrochromic layer sandwiched by the transparent electrodes made of ITO, there are areas where current is easily conducted and areas where it is not easily conducted, and the discoloration (coloration, color loss) of the electrochromic layer is prone to color unevenness.

[0415] The present invention has been made in view of such circumstances, and an object of the present invention is to provide a laminate having an electrochromic sheet capable of developing and eliminating color without delay, a spectacle lens, and spectacles having the spectacle lens.

[0416] In order to solve the above-mentioned problems, one aspect of the present invention includes the following aspects.

[0417] (Solution 1)

[0418] A laminated body, comprising:

[0419] Electrochromic films; and

[0420] A lens component, on which the electrochromic sheet is laminated,

[0421] The electrochromic sheet has:

[0422] 1st substrate;

[0423] 2nd substrate;

[0424] An electrochromic element is sandwiched by the first substrate and the second substrate;

[0425] a sealing portion which is sandwiched by the first substrate and the second substrate and which defines a coloring region between the first substrate and the second substrate; and

[0426] a terminal portion, electrically connected to the electrochromic element and disposed on a surface of the first substrate or the second substrate,

[0427] The electrochromic element has:

[0428] A first transparent electrode is disposed on the first substrate side;

[0429] a first auxiliary electrode disposed around the colored region and electrically connected to the first transparent electrode;

[0430] A second transparent electrode is disposed on the second substrate side;

[0431] a second auxiliary electrode disposed around the colored region and electrically connected to the second transparent electrode; and

[0432] The electrochromic layer is sandwiched between the first transparent electrode and the second transparent electrode, is disposed in the coloring region, and is colored by application of a voltage.

[0433] The terminal portion has:

[0434] a first terminal portion electrically connected to the first auxiliary electrode; and

[0435] a second terminal portion electrically connected to the second auxiliary electrode,

[0436] The first terminal portion has:

[0437] a first conductive portion penetrating the first substrate or the second substrate and electrically connected to the first auxiliary electrode; and

[0438] a first terminal provided on a surface of the first substrate or the second substrate and connected to the first conductive portion;

[0439] The second terminal portion has:

[0440] a second conductive portion penetrating the first substrate or the second substrate and electrically connected to the second auxiliary electrode; and

[0441] The second terminal is provided on the surface of the first substrate or the second substrate and is connected to the second conductive portion.

[0442] (Solution 2)

[0443] The laminate according to claim 1, wherein

[0444] The terminal portion further includes an external connection terminal connected to an external device.

[0445] (Solution 3)

[0446] The laminate according to claim 1 or 2, wherein

[0447] The electrochromic layer has:

[0448] A first electrochromic layer, stacked on the first transparent electrode;

[0449] a second electrochromic layer stacked on the second transparent electrode; and

[0450] an electrolyte layer filled between the first electrochromic layer and the second electrochromic layer,

[0451] The first electrochromic layer includes a material that exhibits coloration through an oxidation reaction.

[0452] The second electrochromic layer includes a material that exhibits coloration through a reduction reaction.

[0453] (Solution 4)

[0454] A lens for spectacles, comprising:

[0455] an electrochromic portion obtained by cutting the electrochromic sheet included in the laminate according to claim 1 along the peripheries of the first auxiliary electrode and the second auxiliary electrode; and

[0456] The lens body is laminated with the electrochromic portion.

[0457] (Scheme 5)

[0458] A pair of glasses, comprising:

[0459] The eyeglass lens according to claim 4; and

[0460] A glasses frame holds the lenses of the glasses.

[0461] According to the present invention, there are provided a laminate having an electrochromic sheet capable of developing and eliminating color without delay, an eyeglass lens, and eyeglasses having the eyeglass lens.

[0462] 《Laminated body, electrochromic film》

[0463] Fig.15 is an exploded perspective view of the stacked body 160. Fig.16 yes Fig.15 A partial cross-sectional view of the line segment III-III, Fig.17 yes Fig.15 The EC sheet 150 is used as a material for eyeglass lenses described later.

[0464] like Figure 15 to Figure 17 As shown, the laminated body 160 includes an electrochromic sheet 150 (EC sheet 150 ) and a lens member 119 on which the EC sheet 150 is laminated.

[0465] The EC sheet 150 includes a first substrate 11, a second substrate 12, an electrochromic element 30 (EC element 30), a sealing portion 40, and a terminal portion 50. Fig.15 In the figure, the sealing portion 40 and the terminal portion 50 are omitted.

[0466] The first substrate 11 and the second substrate 12 sandwich the EC element 30 and the sealing portion 40. The sealing portion 40 is disposed around the EC element 30 between the first substrate 11 and the second substrate 12, and partitions the first substrate 11 and the second substrate 12. The region partitioned by the sealing portion 40 is a coloring region AR whose color changes by voltage application.

[0467] [1st substrate, 2nd substrate]

[0468] The first substrate 11 and the second substrate 12 are the outermost layers of the EC sheet 150. The first substrate 11 and the second substrate 12 are arranged to face each other, and function as a protective layer for protecting the EC element 30 and the like.

[0469] The first substrate 11 and the second substrate 12 have visible light transmittance. In this specification, visible light transmittance is sometimes referred to as "transparency". Also, visible light transmittance is sometimes referred to as "transparency". If transparent, the first substrate 11 and the second substrate 12 may be colorless or colored.

[0470] The first substrate 11 and the second substrate 12 contain a transparent thermoplastic resin as a main material. Examples of such resins include acrylic resins, polystyrene resins, polyethylene resins, polypropylene resins, polyester resins (polyethylene terephthalate (PET), polyethylene naphthalate (PEN), etc.), polycarbonate resins, polyamide resins, cycloolefin resins, vinyl chloride resins, polyacetal resins, triacetyl cellulose (TAC), etc.

[0471] As the material of the first substrate 11 and the second substrate 12, one of the above-mentioned resins may be used, or two or more of them may be used in combination. As the material of the first substrate 11 and the second substrate 12, polycarbonate-based resins or polyamide-based resins are preferred.

[0472] Furthermore, as long as they have transparency, known fillers or additives may be included in the materials of the first substrate 11 and the second substrate 12. Furthermore, the first substrate 11 and the second substrate 12 may be a single layer or a laminate.

[0473] The refractive index of the first substrate 11 and the second substrate 12 at a wavelength of 589 nm is preferably 1.3 to 1.8, more preferably 1.4 to 1.65. By setting the refractive index of the first substrate 11 and the second substrate 12 within this range, the function of the electrochromic element 30 can be improved.

[0474] The average thickness of the first substrate 11 and the second substrate 12 is, for example, 0.05 mm to 10.0 mm, or preferably 0.3 mm to 5.0 mm.

[0475] [Electrochromic element]

[0476] The EC element 30 changes color (colors or fades) by electrochromism caused by voltage application. The EC element 30 includes a first transparent electrode 31, a second transparent electrode 32, a first auxiliary electrode 33, a second auxiliary electrode 34, and an electrochromic layer 35 (EC layer 35).

[0477] (First transparent electrode, second transparent electrode)

[0478] The first transparent electrode 31 is provided on the first substrate 11 side of the EC element 30 and is formed on the surface of the first substrate 11 on the second substrate 12 side. Furthermore, the second transparent electrode 32 is provided on the second substrate 12 side of the EC element 30 and is formed on the surface of the second substrate 12 on the first substrate 11 side.

[0479] exist Fig.15 In the embodiment, the first transparent electrode 31 has a portion 31a protruding in the same manner as the first extraction portion 332 at a position overlapping with the first extraction portion 332 described later, but the portion 31a may not be provided. Similarly, the second transparent electrode 32 has a portion 32a protruding in the same manner as the second extraction portion 342 at a position overlapping with the second extraction portion 342 described later, but the portion 32a may not be provided.

[0480] The first transparent electrode 31 and the second transparent electrode 32 have transparency. As the material of the first transparent electrode 31 and the second transparent electrode 32, for example, ITO, FTO (F-doped Tin Oxide: fluorine-doped tin oxide), ATO (Antimony Tin Oxide: antimony tin oxide), IZO (Indium Zinc Oxide: indium zinc oxide), In2O3, SnO2, SnO2 containing Sb, ZnO containing Al and other oxides, Au, Pt, Ag, Cu or alloys containing them can be cited. As the material of the first transparent electrode 31 and the second transparent electrode 32, one of them can be used, or two or more of them can be used in combination.

[0481] The thickness of the first transparent electrode 31 and the second transparent electrode 32 is adjusted so as to ensure the required transparency and obtain a resistance value capable of appropriately applying a voltage to the EC layer 35. When ITO is used as the material of the first transparent electrode 31 and the second transparent electrode 32, the average thickness of the first transparent electrode 31 and the second transparent electrode 32 is, for example, independently set to 50 nm or more and 200 nm or less, preferably 50 nm or more and 150 nm or less, and more preferably 60 nm or more and 130 nm or less.

[0482] (First auxiliary electrode, second auxiliary electrode)

[0483] The first auxiliary electrode 33 is disposed around the colored region AR in the peripheral portion of the first transparent electrode 31 and is electrically connected to the first transparent electrode 31. The first auxiliary electrode 33 has a strip-shaped first frame body 331 and a first lead portion 332 protruding from the first frame body 331 to the outside of the colored region AR.

[0484] The first frame 331 surrounds a portion of the EC layer 35, that is, a portion of the colored region AR. The first frame 331 is curved in a plan view, but is not limited thereto. When the lens 110 is formed, the first frame 331 is provided at a position surrounding the lens 110. The width of the first frame 331 is preferably set to be greater than 0.1 mm and less than 1.0 mm, for example, and more preferably set to be greater than 0.3 mm and less than 1.0 mm.

[0485] The first extraction portion 332 is provided at a position closer to one end of the first frame body 331 than the center of the first frame body 331 in a plan view. When the lens 110 is manufactured, the first extraction portion 332 is provided near the center beam portion 122 or the temple portion 123 of the lens frame 120 .

[0486] The second auxiliary electrode 34 is arranged around the colored region AR on the peripheral surface of the second transparent electrode 32 and is electrically connected to the second transparent electrode 32. The second auxiliary electrode 34 has a strip-shaped second frame body 341 and a second lead-out portion 342 protruding from the second frame body 341 to the outside of the colored region AR.

[0487] The second frame 341 surrounds a portion of the EC layer 35, that is, a portion of the colored region AR. The second frame 341 is curved in a plan view, but is not limited thereto. When the lens 110 is formed, the second frame 341 is provided at a position surrounding the lens 110. The width of the second frame 341 is preferably set to be greater than 0.1 mm and less than 1.0 mm, for example, and more preferably set to be greater than 0.3 mm and less than 1.0 mm.

[0488] The second extraction portion 342 is provided at a position closer to one end of the second frame body 341 than the center of the second frame body 341 in a plan view. When the lens 110 is manufactured, the second extraction portion 342 is provided near the center beam portion 122 or the temple portion 123 of the lens frame 120 .

[0489] The first auxiliary electrode 33 and the second auxiliary electrode 34 do not overlap each other in a plan view and are located on opposite sides across the colored region AR in a plan view. Furthermore, the first lead-out portion 332 does not overlap the second transparent electrode 32 , and the second lead-out portion 342 does not overlap the first transparent electrode 31 .

[0490] Assuming the smallest rectangle among the rectangles circumscribing the first transparent electrode 31 in a plan view, the first auxiliary electrode 33 of the EC sheet of this embodiment is provided in a region on one end of one side of the rectangle, and the second auxiliary electrode 34 is provided in a region on one end of one side.

[0491] In the side direction perpendicular to one side of the rectangle, the length of the first auxiliary electrode 33 (first frame body 331 ) is not less than 50% and not more than 100% of the length of the first transparent electrode 31 in the perpendicular direction.

[0492] Furthermore, the length of the second auxiliary electrode 34 (the second frame body 341 ) in the orthogonal direction is not less than 50% and not more than 100% of the length of the second transparent electrode 32 in the orthogonal direction.

[0493] The resistance value of the first auxiliary electrode 33 is lower than the resistance value of the first transparent electrode 31. Similarly, the resistance value of the second auxiliary electrode 34 is lower than the resistance value of the second transparent electrode 32. As the constituent material of the first auxiliary electrode 33 and the second auxiliary electrode 34, for example, silver, aluminum, copper, chromium and molybdenum can be cited. As the constituent material of the first auxiliary electrode 33 and the second auxiliary electrode 34, conductive ink can also be used. As the constituent material of the first auxiliary electrode 33 and the second auxiliary electrode 34, one of them can be used, or two or more of them can be used in combination. The first auxiliary electrode 33 and the second auxiliary electrode 34 can be formed, for example, by sputtering, evaporation, etc. The first auxiliary electrode 33 and the second auxiliary electrode 34 can also be formed by printing using conductive ink.

[0494] The average thickness of the first auxiliary electrode 33 and the second auxiliary electrode 34 is preferably 1 nm or more and 100 nm or less, respectively, independently. The average thickness of the first auxiliary electrode 33 and the second auxiliary electrode 34 is more preferably 5 nm or more and 50 nm or less.

[0495] Fig.18 FIG. 3 is a partial enlarged view of the first auxiliary electrode 33. Fig.18 As shown, in the first auxiliary electrode 33, the connection portion between the first frame body 331 and the first extraction portion 332 (at Fig.18 The contour line (indicated by symbols A1 and A2) is a convex curve on the side of the colored area AR. The curvature radius of the curve is set to be greater than 40 mm. The curvature radius can be measured and calculated by a known method.

[0496] Furthermore, the width of the first extraction portion 332 extending from the first frame body 331 toward the outside is preferably set to 10 mm or less.

[0497] In addition, the width of the first extraction portion 332 is set to a value obtained by measuring the width W1 of the entire first auxiliary electrode 33 at the position where the first extraction portion 332 is provided and subtracting the width W2 of the first frame body 331 from the obtained width W1 of the first auxiliary electrode 33. If the design value is known, the design value can be used as the width W2 of the first frame body 331. When the width of the first frame body 331 is unknown, the widths of a plurality of locations (for example, five locations) are measured at equal intervals, and the arithmetic mean of the measured values ​​can be used as the width W2 of the first frame body 331.

[0498] The width of at least the portion (front end portion) of the first frame 331 including the front end (one end) can be greater than 0.1 mm and less than 1.0 mm. Since the width of the front end portion is greater than 0.1 mm, the resistance can be reduced. Therefore, the coloring and color removal in the colored area AR can be performed without delay. Since the width of the front end portion is less than 1.0 mm, it is difficult to be viewed from the outside. Therefore, the first frame 331 is not conspicuous. Therefore, the aesthetics of the sunglasses 100 can be improved. The width of the front end portion can also be greater than 0.3 mm and less than 1.0 mm.

[0499] Fig.19 FIG. 3 is a partial enlarged view of the second auxiliary electrode 34. Similar to the first auxiliary electrode 33, in the second auxiliary electrode 34, the connection portion between the second frame body 341 and the second extraction portion 342 (at Fig.19 The contour line (indicated by symbols A3 and A4) is a convex curve on the colored area AR side. The curvature radius of the curve is preferably set to 40 mm or more.

[0500] Furthermore, the width of the second extraction portion 342 extending from the second frame body 341 toward the outside is preferably set to 10 mm or less.

[0501] The width W2 can be obtained by measuring the width W3 of the entire second auxiliary electrode 34 at the position where the second lead-out portion 342 is provided in the same manner as the width W1 described above, and subtracting the width W4 of the second frame body 341 from the obtained width W3 of the second auxiliary electrode 34 .

[0502] The width of at least the portion (front end portion) of the second frame 341 including the front end (one end) can be greater than 0.1 mm and less than 1.0 mm. Since the width of the front end portion is greater than 0.1 mm, the resistance can be reduced. Therefore, the coloring and color removal in the colored area AR can be performed without delay. Since the width of the front end portion is less than 1.0 mm, it is difficult to be visually recognized from the outside. Therefore, the second frame 341 is not conspicuous. Therefore, the aesthetics of the sunglasses 100 can be improved. The width of the front end portion can also be greater than 0.3 mm and less than 1.0 mm.

[0503] (Electrochromic layer)

[0504] like Fig.15 , Fig.16 As shown, the EC layer 35 includes: a first electrochromic layer 351 (first EC layer 351), stacked on the first transparent electrode 31; a second electrochromic layer 352 (second EC layer 352), stacked on the second transparent electrode 32; and an electrolyte layer 353 filled between the first EC layer 351 and the second EC layer 352.

[0505] (First electrochromic layer)

[0506] The first EC layer 351 is a layer that changes color, and contains a material that is colored by an oxidation reaction as a main material. Examples of the material that is colored by an oxidation reaction include polymers of radical polymerizable compounds having a triarylamine structure, bisacridone compounds, triphenylamine, benzidine, Prussian blue type complexes, and nickel oxide, which are known materials that show electrochromism and are used in EC elements.

[0507] Examples of the polymer of the radically polymerizable compound having a triarylamine structure include polymers described in JP-A-2016-45464 and JP-A-2020-138925.

[0508] As the material colored by oxidation reaction, these may be used alone or in combination of two or more.

[0509] The average thickness of the first EC layer 351 is preferably 0.1 μm or more and 30 μm or less. The average thickness of the first EC layer 351 is more preferably 0.4 μm or more and 10 μm or less.

[0510] (Second electrochromic layer)

[0511] The second EC layer 352 is a layer that changes color, and contains a material that is colored by a reduction reaction as a main material. Examples of the material that is colored by a reduction reaction include inorganic electrochromic compounds such as tungsten oxide, molybdenum oxide, iridium oxide, and titanium oxide, and organic electrochromic compounds such as viologen compounds and bipyridine compounds, which are known materials that show electrochromism and are used in EC elements.

[0512] As the material colored by reduction reaction, these may be used alone or in combination of two or more.

[0513] The color (color 1) colored by the oxidation reaction of the first EC layer 351 and the color (color 2) colored by the reduction reaction of the second EC layer 352 can be the same hue or different hues. When the color 1 and the color 2 are the same hue, the contrast can be improved by increasing the maximum color concentration. When the color 1 and the color 2 are different hues, the color of the EC element 30 becomes a mixed color of the color 1 and the color 2.

[0514] By coloring both the first EC layer 351 and the second EC layer 352, the redox dyes of the first EC layer 351 and the second EC layer 352 can be simultaneously colored. Therefore, the color development speed can be increased.

[0515] The average thickness of the second EC layer 352 is preferably 0.2 μm or more and 5.0 μm or less. The average thickness of the second EC layer 352 is more preferably 1.0 μm or more and 4.0 μm or less. If the average thickness of the second EC layer 352 is 0.2 μm or more, the color density can be improved. If the average thickness of the second EC layer 352 is 5.0 μm or less, the manufacturing cost can be suppressed. If the average thickness of the second EC layer 352 is 5.0 μm or less, it is less likely to cause a decrease in visibility due to coloring.

[0516] (Electrolyte layer)

[0517] The electrolyte layer 353 is filled between the first EC layer 351 and the second EC layer 352. The electrolyte layer 353 contains an electrolyte having ion conductivity.

[0518] 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 bases. The counter ions (anions) of the electrolyte include halogens, thiocyanate ions (SCN - ), chlorate ion (ClO3 - ), perchlorate ion (ClO4 - ), tetrafluoroborate ion (BF4 - ), hexafluorophosphate ion (PF6 - ), trifluoromethanesulfonate ion (CF3SO3 - ), trifluoroacetate ion (CF3COO - ), bis(fluorosulfonyl)imide (N(SO2F)2 - ).

[0519] As such an electrolyte, specifically, LiClO4, LiBF4, LiAsF6, LiPF6, LiCF3SO3, LiCF3COO, KCl, NaClO3, NaCl, NaBF4, NaSCN, KBF4, Mg(ClO4)2, Mg(BF4)2, etc. can be cited. As the electrolyte, one of them can be used, or two or more of them can be used in combination.

[0520] As the material of the electrolyte, an ionic liquid can also be used. Among ionic liquids, an organic ionic liquid has a molecular structure that shows liquid in a wide temperature range including room temperature, and is therefore easy to handle.

[0521] The average thickness of the electrolyte layer 353 is preferably 20 μm or more and 100 μm or less, more preferably 30 μm or more and 80 μm or less, and still more preferably 30 μm or more and 70 μm or less.

[0522] [Seal part]

[0523] The sealing portion 40 is disposed between the first substrate 11 and the second substrate 12, and divides the coloring region AR. The material of the sealing portion 40 is not particularly limited as long as it is a transparent insulating material. Examples of the material of the sealing portion 40 include resin materials such as acrylic resin and epoxy resin; inorganic oxides such as silicon oxide (SiO2), silicon oxynitride (SiON), and aluminum oxide (Al2O3).

[0524] The average thickness of the sealing portion 40 is adjusted according to the average thickness of the EC element 30. The average thickness of the sealing portion 40 is preferably 20 μm to 100 μm, more preferably 30 μm to 80 μm, and further preferably 40 μm to 60 μm.

[0525] [Terminal part]

[0526] The terminal portion 50 is electrically connected to the EC element 30 and is provided on the surface of the second substrate 12 . The terminal portion 50 includes a first terminal portion 51A connected to the first auxiliary electrode 33 and a second terminal portion 52A connected to the second auxiliary electrode 34 .

[0527] (1st terminal)

[0528] The first terminal portion 51A includes a first conductive portion 51 and a first terminal 511 .

[0529] The first conductive portion 51 penetrates the second substrate 12 and the sealing portion 40 and is electrically connected to the first auxiliary electrode 33. The first conductive portion 51 is formed in a through hole 40a that penetrates the second substrate 12 and the sealing portion 40 at a position that overlaps with the first lead-out portion 332 in a planar manner.

[0530] The first conductive portion 51 can be formed by a conductive paste filled in the through hole 40a or a conductive tubular member inserted in the through hole 40a. In addition, any known material can be appropriately used as long as it is formed in the through hole 40a and can be electrically connected to the first auxiliary electrode 33 (first extraction portion 332).

[0531] The first terminal 511 is a member provided on the surface of the second substrate 12 in an exposed manner and electrically connected to the first conductive portion 51. The first terminal 511 may be, for example, a plate-shaped member provided on the surface of the second substrate 12 as long as it is connected to the first conductive portion 51 on the surface of the second substrate 12. The first terminal 511 preferably has a structure including a terminal 511a provided on the surface of the second substrate 12 and a portion 511b partially buried in the first conductive portion 51, because it can reliably conduct with the first conductive portion 51 and has excellent durability.

[0532] The first terminal portion 51A may further include an external connection terminal 55 connected to an external device. The external connection terminal 55 is electrically connected to the first terminal 511 .

[0533] (Second terminal)

[0534] The second terminal portion 52A includes a second conductive portion 52 and a second terminal 521 .

[0535] The second conductive portion 52 penetrates the second substrate 12 and the sealing portion 40 and is electrically connected to the second auxiliary electrode 34. The second conductive portion 52 is formed in a through hole 40b that penetrates the second substrate 12 and the sealing portion 40 at a position that overlaps with the second lead-out portion 342 in a planar manner.

[0536] exist Fig.17 In FIG. 5 , the second conductive portion 52 and the through hole 40 b are shown to penetrate the second auxiliary electrode 34 (the second lead-out portion 342 ), but they do not need to penetrate the second auxiliary electrode 34 .

[0537] The second conductive portion 52 can have the same structure as the first conductive portion 51 described above.

[0538] The second terminal 521 is exposed on the surface of the second substrate 12 and is electrically connected to the second conductive portion 52. The second terminal 521 includes a terminal 521a provided on the surface of the second substrate 12 and a portion 521b partially embedded in the second conductive portion 52. The second terminal 521 can have the same structure as the first terminal 511 described above.

[0539] The second terminal portion 52A may further include an external connection terminal 56 connected to an external device. The external connection terminal 56 is electrically connected to the second terminal 521 .

[0540] In the present embodiment, the terminal portion 50 is provided on the surface of the second substrate 12 , but may be provided on the surface of the first substrate 11 .

[0541] <<Laminate, lens for spectacles>>

[0542] Fig. 20 It is an explanatory diagram for explaining a method of manufacturing a lens using the EC sheet 150 (laminated body 160 ).

[0543] First, if Fig. 20 As shown in (a), the EC sheet 150 is bent according to the curvature of the target lens by performing a bending process on the EC sheet 150 under heating. The bending process is performed by, for example, press molding or vacuum molding.

[0544] Then, if Fig. 20 As shown in (b), a bent EC sheet 150 is insert-molded as an insert, and a lens component 119 is formed on the concave surface of the EC sheet 150 to obtain a laminated body 160. The lens component 119 is processed as described below to become a lens body 115.

[0545] The lens member 119 has visible light transmittance. As the material of the lens member 119, a known thermoplastic resin as a material of an optical member can be used.

[0546] If the material of the lens component 119 is of the same type or the same as the main material of the substrate (the first substrate 11 or the second substrate 12) in contact with the lens component 119 in the EC sheet 150, it is easy to make the EC sheet 150 and the lens component 119 close together, so it is preferred. In addition, if the material of the substrate and the material of the lens component 119 are of the same type or the same, the refractive index difference between the substrate and the lens component 119 can be reduced, and the scattering or reflection of light at the interface between the EC sheet 150 and the lens component 119 can be suppressed. The refractive index difference between the substrate and the lens component 119 is preferably 0.2 or less, and more preferably 0.1 or less.

[0547] The thickness of the lens member 119 is preferably, for example, not less than 1.5 mm and not more than 20 mm. By setting the thickness of the lens member 119 within the above range, it is possible to achieve both high strength and light weight of the obtained lens.

[0548] Next, the surface of the lens component 119 is polished, and the surfaces of the EC sheet 150 and the lens component 119 are hard-coated and anti-reflected. Then, through holes (through holes 40a, 40b) are formed in the sealing portion 40 at a position overlapping with the first take-out portion 332 and the second take-out portion 342, and the first terminal portion 51A and the second terminal portion 52A electrically connected to the first take-out portion 332 and the second take-out portion 342 in the through holes are formed.

[0549] Then, if Fig. 20 As shown in (c), the laminate 160 is trimmed to have a shape corresponding to the frame 121 of the sunglasses 100. At this time, the trimming of the periphery of the first take-out portion 332 and the second take-out portion 342 is performed using, for example, a rotating cylindrical grinding wheel G.

[0550] By this processing, the lens 110 including the EC portion 111 obtained by cutting the EC sheet 150 along the outer periphery of the first auxiliary electrode 33 and the second auxiliary electrode 34 and the lens main body 115 laminated with the EC portion 111 can be obtained (see FIG. Figure 1 The obtained lens 110 corresponds to the "eyeglass lens" in the present invention.

[0551] The lens member 119 included in the laminate 160 is processed into a lens body 115 by trimming along the outer periphery of the first auxiliary electrode 33 and the second auxiliary electrode 34. The lens body 115 has a protruding portion 115a having the same shape as the first extraction portion 332 and the second extraction portion 342 in a plan view.

[0552] The obtained lens 110 is Figure 1 At this time, the first extraction portion 332 and the second extraction portion 342 of the EC portion 111 are electrically connected to the frame 120 via the conductive portions provided therein. In the present embodiment, the first extraction portion 332 and the second extraction portion 342 are electrically connected to the external terminals (not shown) provided at the temple portion 123 or the middle beam portion 122 of the frame 120 via the first terminal portion 51A and the second terminal portion 52A, and are connected to the battery 126.

[0553] Thus, the sunglasses 100 can be obtained.

[0554] According to the laminated body 160 having the structure described above, the following effects can be obtained.

[0555] Fig.21 , Fig. 22 It is an explanatory diagram showing the effect of the auxiliary electrodes (first auxiliary electrode and second auxiliary electrode). Fig.21 This is the EC portion of the eyeglass lens produced by the above method using an EC sheet (laminate) having no auxiliary electrode. Fig. 22 The EC portion (EC portion 111 ) of the eyeglass lens manufactured by the above-mentioned method using the above-mentioned EC sheet 150 (laminated body 160 ) is shown.

[0556] First, in Fig.21In the EC section 111X shown, when a battery is connected to the first conductive section 51 and the second conductive section 52 electrically connected to the transparent electrodes (first transparent electrode, second transparent electrode) and a voltage is applied, current flows directly from the first conductive section 51 and the second conductive section 52 to the transparent electrodes.

[0557] At this time, the current easily flows on the path (indicated by symbol D1) connecting the first conductive portion 51 and the second conductive portion 52 at the shortest distance because the path is short and the resistance is small, and the current is not easy to flow on the path (indicated by symbol D2) connecting the first conductive portion 51 and the second conductive portion 52 in a circuitous manner relative to the path D1. As a result, in the area of ​​the colored area AR that overlaps with the path D2 and is far from the first conductive portion 51 and the second conductive portion 52, the color change is easily delayed compared to the area overlapping with the path D1.

[0558] In contrast, Fig. 22 When the EC sheet as a material has auxiliary electrodes (the first auxiliary electrode 33 and the second auxiliary electrode 34 ) as in the EC section 111 shown in the figure, the operation is performed as follows.

[0559] In the first auxiliary electrode 33, when a voltage is applied to the first extraction portion 332 via the first conductive portion 51, current first flows from the first extraction portion 332 toward the first frame body 331, and then flows from the first auxiliary electrode 33 toward the first transparent electrode 31. This current is represented by symbol C1.

[0560] Similarly, in the second auxiliary electrode 34, when a voltage is applied from an external power source to the second lead-out portion 342 via the second conductive portion 52, current first flows from the second lead-out portion 342 to the second frame body 341, and then from the second auxiliary electrode 34 to the second transparent electrode 32. This current is represented by symbol C2.

[0561] At this time, the first auxiliary electrode 33 covers most of the width direction at one end side of the first transparent electrode 31, and the second auxiliary electrode 34 covers most of the width direction at the other end side of the second transparent electrode 32. Therefore, in the EC portion 111, when a voltage is applied, the timing of power-on is easily made uniform in the entire coloring area AR via the auxiliary electrodes, thereby suppressing the delay of color change.

[0562] Furthermore, the first auxiliary electrode 33 and the second auxiliary electrode 34 are provided at the peripheral portion of the colored region AR, and are not present in the center of the colored region AR. Therefore, the color development of the colored region AR is not hindered.

[0563] Furthermore, since the laminated body 160 includes the first terminal portion 51A and the second terminal portion 52A, it is easy to connect to an external device, and the assembly process can be simplified.

[0564] According to the laminated body having the above structure, color development and color elimination can be performed without delay by including the first auxiliary electrode 33 and the second auxiliary electrode 34. In addition, by including the terminal portion connected to the first auxiliary electrode 33 and the second auxiliary electrode 34, the assembly process can be simplified.

[0565] Furthermore, according to the spectacle lens and the spectacles having the above-described structure, by including the laminated body 160 , color development and color elimination can be performed without delay.

[0566] In addition, in this embodiment, the sunglasses 100 are shown as an example of glasses, but the present invention is not limited to this. The lens 110 may be applied to goggles for protecting eyes from wind, rain, dust, medicine, etc., for example.

[0567] In the present embodiment, the EC layer 35 includes the first EC layer 351 and the second EC layer 352, but the present invention is not limited thereto. The effects of the present invention can be achieved even if the EC layer 35 includes only one of the first EC layer 351 and the second EC layer 352.

[0568] The preferred embodiment of the present invention has been described above with reference to the accompanying drawings, but the present invention is not limited to this embodiment. The various shapes or combinations of the components shown in the above embodiment are examples, and various changes can be made according to design, specifications, etc. without departing from the scope of the present invention.

[0569] (Fifth embodiment)

[0570] In order to quickly develop and eliminate color in an electrochromic element, an auxiliary electrode is required. However, since the auxiliary electrode is opaque, it may be conspicuous and may impair the appearance.

[0571] An object of one aspect of the present invention is to provide an electrochromic sheet, an eyeglass lens, and eyeglasses that can develop and eliminate color without delay and in which an auxiliary electrode is inconspicuous.

[0572] (Solution 1)

[0573] An electrochromic sheet, comprising:

[0574] 1st substrate;

[0575] a second substrate, arranged opposite to the first substrate;

[0576] An electrochromic element is disposed between the first substrate and the second substrate and forms a coloring area whose color changes by application of voltage;

[0577] An insulating sealing portion dividing the colored area;

[0578] a first auxiliary electrode electrically connected to the electrochromic element; and

[0579] a second auxiliary electrode electrically connected to the electrochromic element,

[0580] The electrochromic element has:

[0581] a first transparent electrode electrically connected to the first auxiliary electrode;

[0582] a second transparent electrode electrically connected to the second auxiliary electrode; and

[0583] One or more electrochromic layers change color through at least one of an oxidation reaction and a reduction reaction,

[0584] The first auxiliary electrode has a lower resistance than the first transparent electrode and has a first counter electrode portion extending along a portion of an outer periphery of the colored region.

[0585] The second auxiliary electrode has a lower resistance than the second transparent electrode and has a second counter electrode portion extending along another portion of the outer periphery of the colored region.

[0586] The second counter electrode portion is located on the opposite side of the colored region from the first counter electrode portion and faces the first counter electrode portion.

[0587] A width of a portion of the first counter electrode portion and the second counter electrode portion including at least one end is greater than or equal to 0.1 mm and less than or equal to 1.0 mm.

[0588] (Solution 2)

[0589] The electrochromic sheet according to Scheme 1, wherein:

[0590] 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.

[0591] The electrochromic element further comprises an electrolyte layer filled between the first electrochromic layer and the second electrochromic layer.

[0592] The first electrochromic layer contains a material that changes color through an oxidation reaction, and the second electrochromic layer contains a material that changes color through a reduction reaction.

[0593] (Solution 3)

[0594] The electrochromic sheet according to Scheme 1, wherein:

[0595] The first counter electrode portion includes: a first extending portion extending toward one side along the outer periphery of the colored region; and a second extending portion extending toward the other side along the outer periphery of the colored region.

[0596] The second counter electrode portion includes: a third extension portion extending toward one side along the outer periphery of the colored region; and a fourth extension portion extending toward the other side along the outer periphery of the colored region.

[0597] The first extension portion and the third extension portion are arranged opposite to each other.

[0598] The one end of the first counter electrode portion is the front end of the first extension portion,

[0599] The one end of the second counter electrode portion is a front end of the third extending portion.

[0600] (Solution 4)

[0601] The electrochromic sheet according to Scheme 1, wherein:

[0602] The distance between the first counter electrode portion and the second counter electrode portion and the outer periphery of the colored region in a plan view is 0.25 mm or more.

[0603] (Scheme 5)

[0604] A spectacles lens comprising the electrochromic sheet according to any one of claims 1 to 4.

[0605] (Scheme 6)

[0606] A pair of spectacles comprising the spectacles lens according to claim 5.

[0607] According to one aspect of the present invention, it is possible to provide an electrochromic sheet, an eyeglass lens, and eyeglasses that can develop and eliminate color without delay and in which the auxiliary electrode is inconspicuous.

[0608] Hereinafter, the electrochromic sheet, the eyeglass lens, and the eyeglasses according to the embodiments will be described in detail.

[0609] <Sunglasses>

[0610] Fig.23 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 to the front surface of the lens is the back surface. Sunglasses are an example of glasses.

[0611] like Fig.23As shown, the sunglasses 100 include a frame 20 and a pair of lenses 30 (spectacle lenses). In addition, in this specification, "lenses (spectacle lenses)" include both lenses with a light-gathering function and lenses without a light-gathering function. The lenses 30 are also called light-transmitting bodies.

[0612] The frame 20 includes a pair of frame parts 21, a middle bridge part 22, a pair of temple parts 23, and a pair of nose pad parts 24. The frame 20 is worn on the head of the user. The frame 20 is arranged so that the lens 30 is placed in front of the user's eyes.

[0613] The frame portion 21 is formed in a ring shape. The pair of frame portions 21 corresponds to the right eye and the left eye of the user, respectively.

[0614] The middle bridge portion 22 connects the pair of frame portions 21. When the middle bridge portion 22 is worn on the head of the user, it is located in front of the upper part of the nose of the user.

[0615] The temple portion 23 is connected to a position on the opposite side of the frame portion 21 to the position to which the center bridge portion 22 is connected. When the temple portion 23 is worn on the head of the user, it is hung on the ear of the user.

[0616] The temple portion 23 has 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 the connection terminal provided by the lens 30 via wiring. The switch 25 can switch between applying a positive voltage, applying a negative voltage, and not applying 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 the connection terminal provided by the lens 30 via wiring.

[0617] The nose pad 24 is formed at a position corresponding to the nose of the user in each frame portion 21. The nose pad 24 contacts the nose of the user. The nose pad 24 stabilizes the wearing state of the sunglasses 100.

[0618] As a constituent material of the eyeglass frame 20, for example, a metal material, a resin material, etc. can be used. In addition, the shape of the eyeglass frame 20 is not limited to the example shown in the figure as long as it can be worn on the head of the user.

[0619] The lens 30 (lens for glasses) is mounted on each frame 21. The lens 30 is light-transmissive. The lens 30 is a plate-shaped curved convex shape protruding outward. The lens 30 is mounted on the inner side of the frame 21. The user can view external information through the lens 30. The lens 30 can be switched to the electrochromic element 60 (refer to Fig.26 ) voltage is applied to reversibly generate and eliminate color.

[0620] The lens 30 includes a curved sheet 120 and a resin layer 35 (see Fig.24(D) The lens 30 includes a pair of connection terminals. The pair of connection terminals are provided at positions corresponding to the connection portions where the center bridge portion 22 and the temple portion 23 are connected to the frame portion 21 .

[0621] The resin layer 35 has light transmittance. The resin layer 35 is located on the back side of the lens 30 relative to the bending piece 120. The resin layer 35 may have a light-collecting function. The resin layer 35 having the light-collecting function imparts the light-collecting function to the lens 30.

[0622] Examples of the constituent material of the resin layer 35 include curable resins such as thermoplastic resins, thermosetting resins, and photocurable resins. The constituent material of the resin layer 35 may be one kind or a combination of two or more kinds.

[0623] If the resin material constituting the resin layer 35 is of the same type or identical to the surface material of the bending piece 120 (for example, the material of the first substrate 11 ), the adhesion between the resin layer 35 and the bending piece 120 can be improved.

[0624] If the material of the resin layer 35 is the same type or the same as the surface material of the bending piece 120, the refractive index difference between the resin layer 35 and the bending piece 120 can be set to be low. Therefore, it is possible to increase the light transmittance of the lens 30. The refractive index difference between the resin layer 35 and the bending piece 120 is preferably 0.2 or less, and more preferably 0.1 or less.

[0625] The thickness of the resin layer 35 is preferably, for example, not less than 1.5 mm and not more than 20 mm. 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.

[0626] 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.

[0627] The sunglasses 100 have a curved sheet 120, so that by switching to the electrochromic element 60 (refer to Fig.26 ) by applying a voltage of , it is possible to reversibly perform color development and color elimination at any time.

[0628] The sunglasses 100 have a frame 20, but the shape of the frame is not particularly limited. For example, a frame without a frame portion may be used. From the viewpoint of fashion, lightness, etc., the glasses may be a frameless structure.

[0629] In the present embodiment, the lens 30 is applied to the sunglasses 100, but the application object of the lens is not limited thereto. The application object of the lens may be, for example, goggles, etc.

[0630] <Lens manufacturing method>

[0631] Fig.24 (A)~ Fig.24 (D) is a diagram for explaining a method for manufacturing a lens using the electrochromic sheet according to the embodiment.

[0632] [1] Fig.24 As shown in (A), the element sealing and connecting sheet 110 (electrochromic sheet 150) is prepared. The element sealing and connecting sheet 110 includes a first substrate 11, a second substrate 12, a sealing portion 55, and an electrochromic element 60 (see Fig.26 The protection films 50 (or masking films) are attached to both surfaces of the element sealing connecting sheet 110 to obtain the connecting sheet laminate 210 .

[0633] [2] Fig.24 As shown in (B), the connecting sheet laminate 210 is punched out in the thickness direction to obtain a circular element laminate 250 that is cut into individual pieces.

[0634] [3] Fig.24 As shown in (C), the individualized element stack 250 is bent under heating to form the element stack 220 in a curved shape. The element stack 220 includes the curved sheet 120 (electrochromic sheet 150) and protective films 50 attached to both surfaces thereof.

[0635] [4] Peel off the protective film 50 from the bending sheet 120. Fig.24 As shown in FIG. 2 , a resin layer 35 (molding layer) is formed on the curved concave surface of the curved piece 120 by insert injection molding using a mold 40. Thus, a lens 30 (spectacle lens) including the curved piece 120 and the resin layer 35 is obtained. The lens 30 is formed into a shape corresponding to the frame 21 by trimming, cutting, etc. (see FIG. 2 ). Fig.23 ). The lens 30 is mounted on the frame portion 21 .

[0636] <Electrochromic film>

[0637] Fig.25 1 is a plan view showing the electrochromic sheet 150 . Fig.26 Yes means Fig.25 Schematic diagram of the AA section is shown. Fig. 27 2 is a schematic diagram showing a cross section of the electrochromic element 60 .

[0638] like Fig.26 As shown, the electrochromic sheet 150 includes a first substrate 11 , a second substrate 12 , a sealing portion 55 , an electrochromic element 60 , a first conductive portion 17 , a second conductive portion 18 , a first auxiliary electrode 15 , and a second auxiliary electrode 16 .

[0639] The first substrate 11 and the second substrate 12 are the outermost layers of the electrochromic sheet 150. The second substrate 12 and the first substrate 11 are arranged opposite to each other. The first substrate 11 and the second substrate 12 have the function of a protective layer for protecting 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.

[0640] As the transparent resin constituting the first substrate 11 and the second substrate 12, for example, acrylic resin, polystyrene resin, polyethylene resin, polypropylene resin, polyester resin (polyethylene terephthalate (PET), polyethylene naphthalate (PEN) etc.), polycarbonate resin, polyamide resin, cycloolefin resin, vinyl chloride resin, polyacetal resin, triacetyl cellulose (TAC) etc. can be cited. As the transparent resin, one of them can be used, or two or more of them can be used in combination. As the transparent resin, polycarbonate resin or polyamide resin is preferred.

[0641] Since the polycarbonate resin has high transparency (light transmittance), mechanical strength (rigidity, etc.) and heat resistance, it is possible to improve the transparency, impact resistance and heat resistance of the first substrate 11 and the second substrate 12. As the polycarbonate resin, an aromatic polycarbonate resin is preferred. An aromatic polycarbonate resin has an aromatic ring in its main chain. By using an aromatic polycarbonate resin, the first substrate 11 and the second substrate 12 having excellent strength can be obtained.

[0642] Aromatic polycarbonate resins are synthesized, for example, by an interfacial polycondensation reaction of bisphenol and phosgene, an ester exchange reaction of bisphenol and diphenyl carbonate, etc. Examples of bisphenols include bisphenol (modified bisphenol) and bisphenol A, which are the origin of the repeating unit of the polycarbonate represented by formula (1A).

[0643]

[0644] (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. p is the number of repeating units.)

[0645] In addition, examples of bisphenols that are the origin of repeating units of the polycarbonate represented by 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-dicyclohexyl-1,4-bis(4-hydroxyphenyl)benzene, 1,1'-bis(4-hydroxy-3-methylphenyl)cyclohexane, and 2,2'-bis(4-hydroxy-3-methylphenyl)propane. As the bisphenol, one of these may be used, or two or more of them may be used in combination.

[0646] The polycarbonate resin preferably contains a bisphenol-type polycarbonate resin having a skeleton derived from bisphenol as a main component. By using the bisphenol-type polycarbonate resin, the first substrate 11 and the second substrate 12 exhibit excellent strength.

[0647] 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.

[0648] 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 dyes include acid dyes, direct dyes, reactive dyes, and basic dyes. As dyes, one of these may be used, or two or more of them may be used in combination.

[0649] The first substrate 11 and the second substrate 12 may contain additives such as antioxidants, fillers, plasticizers, light stabilizers, ultraviolet absorbers, heat absorbers, flame retardants, etc. as necessary. The first substrate 11 and the second substrate 12 may be stretched or unstretched.

[0650] The refractive index of the first substrate 11 and the second substrate 12 at a wavelength of 589 nm is preferably 1.3 to 1.8, more preferably 1.4 to 1.65. 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 improved.

[0651] The average thickness of the first substrate 11 and the second substrate 12 is, for example, not less than 0.05 mm and not more than 10.0 mm, or preferably not less than 0.3 mm and not more than 5.0 mm.

[0652] The electrochromic element 60 is capable of being switched by the switch 25 (refer to Fig.23) can be switched between coloring (coloring) and decoloring at any time by switching the on / off switch of the electrochromic element 60 (more specifically, the main part 61) to form a coloring area 70 divided by the sealing part 55. The electrochromic element 60 is provided between the first substrate 11 and the second substrate 12.

[0653] like Fig. 27 As shown, 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 .

[0654] 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 when a voltage is applied.

[0655] 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 .

[0656] The first transparent electrode 13 and the second transparent electrode 14 are connected to each other by switches 25 (refer to Fig.23 ) is switched to supply or accept electrons when a positive voltage or a negative voltage is applied to the electrochromic element 60.

[0657] The first transparent electrode 13 and the second transparent electrode 14 are transparent. The constituent materials of the first transparent electrode 13 and the second transparent electrode 14 are conductive materials. Examples of the constituent materials of the first transparent electrode 13 and the second transparent electrode 14 include ITO (Indium Tin Oxide), FTO (F-doped Tin Oxide), ATO (Antimony Tin Oxide), IZO (Indium Zinc Oxide), In2O3, SnO2, SnO2 containing Sb, ZnO containing Al and other oxides. As the constituent materials of the first transparent electrode 13 and the second transparent electrode 14, one of them may be used, or two or more thereof may be used in combination.

[0658] The thickness of the first transparent electrode 13 and the second transparent electrode 14 is specified to obtain a resistance value required 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 set to 50 nm or more and 200 nm or less, preferably 50 nm or more and 150 nm or less, and more preferably 60 nm or more and 130 nm or less.

[0659] The first electrochromic layer 63 (electrochromic layer) is a layer whose color changes. The first electrochromic layer 63 contains a material colored by an oxidation reaction as a main material. As a material colored by an oxidation reaction, for example, a polymer of a radical polymerizable compound having a triarylamine structure, a bisacridone compound, triphenylamine, benzidine, a Prussian blue type complex, and nickel oxide can be cited. As a material colored by an oxidation reaction, one of them can be used, or two or more can be used in combination.

[0660] Examples of the polymer of the radical polymerizable compound having a triarylamine structure include polymers described in JP-A No. 2016-45464 and JP-A No. 2020-138925.

[0661] Examples of the Prussian blue type complex include Fe(III)4[Fe(II)(CN)6]3.

[0662] Among these, a polymer of a radical polymerizable compound having a triarylamine structure is preferred. By using this polymer, an electrochromic element can be operated at a constant voltage, and excellent in repetition durability and high contrast can be obtained.

[0663] In addition, the polymer of the radical polymerizable compound having a triarylamine structure may contain another radical polymerizable compound different from the radical polymerizable compound having a triarylamine structure. The radical polymerizable compound having a triarylamine structure and the other radical polymerizable compound may be cross-linked.

[0664] The average thickness of the first electrochromic layer 63 is preferably 0.1 μm or more and 30 μm or less, and more preferably 0.4 μm or more and 10 μm or less.

[0665] The second electrochromic layer 64 (electrochromic layer) is a layer whose color changes. The second electrochromic layer 64 contains a material colored by a reduction reaction as a main material. As a material colored by a reduction reaction, it is preferred to use a material of the same color tone as the first electrochromic layer 63. Thus, the maximum color concentration can be increased, so that the contrast can be improved. As a material colored by a reduction reaction, a material of a different color tone from the first electrochromic layer 63 can be used. At this time, color mixing can be performed.

[0666] By coloring both the two electrochromic layers 63 and 64, the redox pigments of the electrochromic layers 63 and 64 can be simultaneously colored. Therefore, the coloring speed can be increased. By coloring both the electrochromic layers 63 and 64, the driving voltage of the electrochromic element 60 can be suppressed. Therefore, the repeated durability of the electrochromic element 60 can be improved.

[0667] Examples of the material that is 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 alone, or two or more of these may be used in combination.

[0668] As inorganic electrochromic compounds, for example, tungsten oxide, molybdenum oxide, iridium oxide, titanium oxide, etc. can be cited. Among them, tungsten oxide is preferred. Tungsten oxide has a low reduction potential, so the coloring / decoloring potential is low. Tungsten oxide is an inorganic material, so it is excellent in durability.

[0669] As organic electrochromic compounds, for example, low molecular weight organic electrochromic compounds such as azobenzene, anthraquinone, diarylethene, dihydropyrene, dipyridine, styryl, styryl spiropyran, spirooxazine, spirothiany, thioindigo, tetrathiafulvalene, terephthalic acid, triphenylmethane, triphenylamine, naphthopyran, viologen, pyrazoline, phenazine, phenylenediamine, phenoxazine, phenothiazine, phthalocyanine, fluorane, fulgide, benzopyran, and metallocene can be cited. Among them, viologen compounds and dipyridine compounds are preferred. The color development / color elimination potential of viologen compounds and dipyridine compounds is low, showing a good color value.

[0670] Examples of the viologen compounds include compounds described in Japanese Patent No. 3955641 and Japanese Patent Application Laid-Open No. 2007-171781, etc. Examples of the bipyridine compounds include compounds described in Japanese Patent Application Laid-Open No. 2007-171781 and Japanese Patent Application Laid-Open No. 2008-116718, etc.

[0671] Examples of the conductive polymer include polypyrrole, polythiophene, polyaniline, and derivatives thereof.

[0672] 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. If the average thickness of the second electrochromic layer 64 is 0.2 μm or more, the color concentration can be improved. If the average thickness of the second electrochromic layer 64 is 5.0 μm or less, the manufacturing cost can be suppressed. If the average thickness of the second electrochromic layer 64 is 5.0 μm or less, it is not easy to cause a decrease in visibility due to coloring.

[0673] 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 ion conductivity.

[0674] 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 bases. The counter ions (anions) of the electrolyte include halogens, thiocyanate ions (SCN - ), chlorate ion (ClO3 - ), perchlorate ion (ClO4 - ), tetrafluoroborate ion (BF4 - ), hexafluorophosphate ion (PF6 - ), trifluoromethanesulfonate ion (CF3SO3 - ), trifluoroacetate ion (CF3COO - ), bis(fluorosulfonyl)imide (N(SO2F)2 - ).

[0675] As such an electrolyte, specifically, LiClO4, LiBF4, LiAsF6, LiPF6, LiCF3SO3, LiCF3COO, KCl, NaClO3, NaCl, NaBF4, NaSCN, KBF4, Mg(ClO4)2, Mg(BF4)2, etc. can be cited. As the electrolyte, one of them can be used, or two or more of them can be used in combination.

[0676] As the material of the electrolyte, an ionic liquid can also be used. Among ionic liquids, an organic ionic liquid has a molecular structure that shows liquid in a wide temperature range including room temperature, and is therefore easy to handle.

[0677] Examples of the cationic component of the organic ionic liquid include imidazole derivatives such as N,N-dimethylimidazolium salt, N,N-methylethylimidazolium salt, and N,N-methylpropylimidazolium salt; pyridinium derivatives such as N,N-dimethylpyridinium salt, and N,N-methylpropylpyridinium salt; and aliphatic quaternary ammonium systems such as trimethylpropylammonium salt, trimethylhexylammonium salt, and triethylhexylammonium salt. As the anionic component, it is preferred to use a fluorine-containing compound in consideration of the stability in the atmosphere. Examples of the anionic component include BF4 - CF3SO3 - PF4 - 、(CF3SO2)2N - wait.

[0678] As a material of the electrolyte, an ionic liquid in which a cationic component and an anionic component are combined is preferable.

[0679] The ionic liquid can be directly dissolved in any one of the photopolymerizable monomers, oligomers and liquid crystal materials. In addition, when the solubility of the ionic liquid in these materials is low, a solution prepared by dissolving the ionic liquid in a small amount of solvent in advance can be mixed with any one of the photopolymerizable monomers, oligomers and liquid crystal materials.

[0680] Examples of the solvent include propylene carbonate, acetonitrile, γ-butyrolactone, ethylene carbonate, sulfolane, dioxolane, tetrahydrofuran, 2-methyltetrahydrofuran, dimethyl sulfoxide, 1,2-dimethoxyethane, 1,2-ethoxymethoxyethane, polyethylene glycol, alcohols, and mixed solvents thereof.

[0681] The electrolyte may be a low-viscosity liquid. The electrolyte may be in various forms such as a gel, a polymer cross-linked type, a liquid crystal dispersion type, etc. The electrolyte is preferably formed into a gel or solid state. Thus, it is possible to improve the element strength or reliability of the electrochromic element 60.

[0682] As a method for making the electrolyte layer 65 solid, for example, a method of retaining a liquid containing an electrolyte and a solvent in a resin is preferred. In this way, both high ion conductivity and solid strength of the electrolyte layer 65 can be obtained. As the resin, for example, a photocurable resin is preferred. In this way, compared with the case where the solid electrolyte layer 65 is obtained by thermal polymerization or solvent vaporization, the solid electrolyte layer 65 can be obtained at a low temperature and in a short time.

[0683] 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 further preferably 30 μm or more and 70 μm or less.

[0684] In addition, an intermediate layer such as an insulating porous layer or a protective layer may be provided between the layers between the first transparent electrode 13 and the second transparent electrode 14 .

[0685] like Fig.26 As shown, the sealing portion 55 is disposed between the first substrate 11 and the second substrate 12 and defines the coloring region 70. The sealing portion 55 has insulating properties and surrounds the coloring region 70 in a plan view.

[0686] The material constituting the sealing portion 55 is not particularly limited as long as it is a transparent insulating material, and examples thereof include resin materials such as acrylic resin and epoxy resin; inorganic oxides such as silicon oxide (SiO2), silicon oxynitride (SiON), and aluminum oxide (Al2O3); and the like.

[0687] The thickness of the sealing portion 55 is determined according to the thickness of the electrochromic element 60. The average thickness of the sealing portion 55 is preferably 20 μm to 100 μm, more preferably 30 μm to 80 μm, and more preferably 40 μm to 60 μm.

[0688] 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 portion 17 is formed in contact with the first lead-out portion 15B (refer to Fig.28 ) penetrates the sealing portion 55 in the thickness direction at a position where the first conductive portion 17 overlaps with the first auxiliary electrode 15. 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 position on the side of the middle beam portion 22 and the side of the temple portion 23, for example.

[0689] 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 first conductive portion 17 with respect to the colored region 70. The second conductive portion 18 is provided on the second lead-out portion 16B (refer to Fig.28 ) penetrates the sealing portion 55 in the thickness direction at a position where the second conductive portion 18 overlaps. The second conductive portion 18 is electrically connected to the second transparent electrode 14 via the second auxiliary electrode 16. The second conductive portion 18 is electrically connected to the second transparent electrode 14 at another position on the side of the middle beam portion 22 and the side of the temple portion 23, for example.

[0690] In this way, the first conductive portion 17 is electrically connected to the first transparent electrode 13 at one position on the side of the middle beam portion 22 and the side of the temple portion 23. The second conductive portion 18 is electrically connected to the second transparent electrode 14 at the other position on the side of the middle beam portion 22 and the side of the temple portion 23. Therefore, a voltage can be applied between the first transparent electrode 13 and the second transparent electrode 14 via the first conductive portion 17 and the second conductive portion 18. The first conductive portion 17 and the second conductive portion 18 function as connection terminals when a voltage is applied 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 develops or loses color.

[0691] After step [3] or after step [4], by applying a voltage between the first transparent electrode 13 and the second transparent electrode 14 via the first conductive portion 17 and the second conductive portion 18 , the electrochromic element 60 can be easily inspected.

[0692] As a constituent material of the first conductive portion 17 and the second conductive portion 18, for example, a conductive paste such as a silver paste can be cited. The constituent material of the first conductive portion 17 and the second conductive portion 18 may be a material containing a metal such as gold, copper, or an alloy thereof.

[0693] The average thickness of the first conductive portion 17 and the second conductive portion 18 is preferably independently 20 μm or more and 100 μm or less, and more preferably 40 μm or more and 80 μm or less.

[0694] Fig.28 It is an exploded perspective view showing the electrochromic sheet 150 . Fig.29 is a top view of a portion of the electrochromic film 150 . Fig.29 yes Fig.25 Magnified view of region R1 in FIG. Fig.30 is a top view of a portion of the electrochromic film 150 . Fig.30 yes Fig.25 Magnified view of region R2 in FIG.

[0695] In the following description, the XYZ orthogonal coordinate system is used. Fig.28 As shown, the X direction is the direction connecting the first take-out portion 15B and the second take-out portion 16B in a plane along the surface of the first substrate 11. The Y direction is orthogonal to the X direction in a plane along the surface of the first substrate 11. The Z direction is orthogonal to both the X direction and the Y direction. A top view refers to an observation parallel to the Z direction. One of the X directions is called the "+X direction". The direction opposite to the +X direction is called the "-X direction". One of the Y directions is called the "+Y direction". The direction opposite to the +Y direction is called the "-Y direction".

[0696] exist Fig.28 In FIG. 1 , the first transparent electrode 13 and the second transparent electrode 14 are shown in the shape of the lens 30 .

[0697] The first transparent electrode 13 includes, for example, a first main body portion 13A and a first protruding portion 13B. The first main body portion 13A is, for example, disposed parallel to the lens 30 (see FIG. 1 ). Fig.23 ). In a plan view, the first main body 13A may be, for example, circular, elliptical, etc. The first protrusion 13B protrudes in the -X direction (a direction away from the colored region 70) from a portion of the outer periphery of the first main body 13A on the -X direction side. The first protrusion 13B is formed at a position corresponding to the connecting portion (the portion where the middle beam portion 22 or the temple portion 23 is connected to the frame portion 21).

[0698] The second transparent electrode 14 includes, for example, a second main body portion 14A and a second protruding portion 14B. The second main body portion 14A is, for example, disposed parallel to the lens 30 (see FIG. 1 ). Fig.23). In a plan view, the second main body 14A may be, for example, circular, elliptical, etc. The second protrusion 14B protrudes in the +X direction (a direction away from the colored region 70) from a portion of the outer periphery of the second main body 14A on the +X direction side. The second protrusion 14B is formed at a position corresponding to the connecting portion (the portion where the middle beam portion 22 or the temple portion 23 is connected to the frame portion 21).

[0699] The first auxiliary electrode 15 includes a first counter electrode portion 15A and a first extraction portion 15B. The first counter electrode portion 15A extends along a portion of the outer periphery 70a of the coloring region 70. Specifically, the first counter electrode portion 15A extends along a portion on the -X direction side of the outer periphery 70a of the coloring region 70. The first counter electrode portion 15A is formed away from the outer periphery 70a of the coloring region 70.

[0700] The first auxiliary electrode 15 is stacked 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 portion 17. The first auxiliary electrode 15 electrically connects the first transparent electrode 13 to the first conductive portion 17 (see Fig.26 ).

[0701] The resistance value of the first auxiliary electrode 15 is lower than the resistance value of the first transparent electrode 13. That is, the resistance of the first auxiliary electrode 15 is lower than the resistance of the first transparent electrode 13. Therefore, it is possible to impart high conductivity 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-resistance wiring electrically connected to the electrochromic element 60 (see Fig.26 ).

[0702] like Fig.25 As shown, the first counter electrode portion 15A includes a first extending portion 1 and a second extending portion 2 .

[0703] The first extension portion 1 is formed from the middle position (the position where the first lead-out portion 15B is formed) of the first counter electrode portion 15A in the longitudinal direction as a starting point along the outer peripheral edge 70a of the colored region 70 to one side ( Fig.25 The first extension portion 1 is a linear portion extending in the +Y direction ( Fig.25 The first extension portion 1 is bent so that the inclination angle (inclination angle with respect to the X direction) gradually decreases toward the front end.

[0704] The length of the first extended portion 1 can be set to, for example, 5 mm or more and 20 mm or less. If the length of the first extended portion 1 is within this range, a voltage can be uniformly applied over a wide range of the colored region 70 .

[0705] like Fig.29 As shown, in a plan view, the width W1 of the portion 1A (front end portion 1A) of the first extension portion 1 including at least the front end 1a (one end) is greater than or equal to 0.1 mm and less than or equal to 1.0 mm. Since the width W1 of the front end portion 1A is greater than or equal to 0.1 mm, the resistance can be reduced. Therefore, the coloring and color removal in the colored area 70 can be performed without delay. Since the width W1 of the front end portion 1A is less than or equal to 1.0 mm, it is not easy to be recognized from the outside. Therefore, the first extension portion 1 is not easy to be conspicuous. Therefore, the aesthetics of the sunglasses 100 can be improved. The width W1 can also be greater than or equal to 0.3 mm and less than or equal to 1.0 mm. The width W1 is preferably greater than or equal to 0.3 mm and less than or equal to 0.7 mm.

[0706] In the present embodiment, the front end portion 1A of the first extension portion 1 is a length portion having a constant width (width W1 ).

[0707] The front end portion of the first extension portion 1 is not limited to a shape having a constant width, and may also be a shape whose width gradually narrows toward the front end. In this case, the width of the front end portion may be an average width of a specified length range (e.g., a length range of 5 mm from the front end). The width of the front end portion may also be the width of the front end.

[0708] In a top view, the distance W2 between the first counter electrode portion 15A (for example, the first extension portion 1 and the second extension portion 2) and the outer peripheral edge 70a of the coloring region 70 is preferably greater than 0.25 mm. If the distance W2 is greater than 0.25 mm, the first counter electrode portion 15A is located sufficiently far away from the coloring region 70. Therefore, the influence from the coloring region 70 can be suppressed, thereby suppressing the degradation of the first counter electrode portion 15A. If the distance W2 is greater than 0.25 mm, the influence from the outside on the coloring region 70 can be reduced. Therefore, the characteristics of the coloring region 70 can be improved. The distance W2 is preferably greater than 0.5 mm. The distance W2 can also be, for example, less than 2 mm.

[0709] like Fig.25 As shown, the second extension portion 2 is formed from the middle position (the position where the first extraction portion 15B is formed) (the first base) in the length direction of the first counter electrode portion 15A as a starting point along the outer peripheral edge 70a of the colored region 70 to the other side ( Fig.25 The second extension portion 2 is close to the second counter electrode portion 16A (more specifically, the fourth extension portion 4) and extends in the -Y direction ( Fig.25The second extension portion 2 is curved so that the inclination angle (the inclination angle with respect to the X direction) gradually decreases toward the front end.

[0710] In a top view, the width of at least the portion (front end portion) of the second extension portion 2 including the front end (one end) may be 0.1 mm or more and 1.0 mm or less. Since the width of the front end portion is 0.1 mm or more, the resistance can be reduced. Therefore, the coloring and color removal in the colored area 70 can be performed without delay. Since the width of the front end portion is 1.0 mm or less, it is difficult to be visually recognized from the outside. Therefore, the second extension portion 2 is not easily conspicuous. Therefore, the aesthetics of the sunglasses 100 can be improved. The width of the front end portion may also be 0.3 mm or more and 1.0 mm or less.

[0711] In the present embodiment, the front end portion of the second extension portion 2 is a length portion having a constant width.

[0712] The front end portion of the second extension portion 2 is not limited to a shape having a constant width, and may also be a shape whose width gradually narrows toward the front end. In this case, the width of the front end portion may be an average width of a specified length range (e.g., a length range of 5 mm from the front end). The width of the front end portion may also be the width of the front end.

[0713] The second extension portion 2 may be longer than the first extension portion 1 or may be the same length as the first extension portion 1. The dimension of the second extension portion 2 in the Y direction may be larger than the dimension of the first extension portion 1 in the Y direction.

[0714] Since the first counter electrode portion 15A includes the first extension portion 1 and the second extension portion 2, a voltage can be uniformly applied over a wide range of the coloring region 70. Therefore, sufficient color development (coloring) and color elimination can be achieved over a wide range of the coloring region 70.

[0715] like Fig.28 As shown in FIG. 1 , the first extraction portion 15B protrudes from a portion of the outer periphery of the first counter electrode portion 15A in the −X direction (the direction away from the colored region 70). The first extraction portion 15B is formed, for example, at a position overlapping with the first protruding portion 13B of the first transparent electrode 13. The first extraction portion 15B is formed at a position corresponding to the connecting portion (the portion where the middle beam portion 22 or the temple portion 23 is connected to the frame portion 21).

[0716] The second auxiliary electrode 16 includes a second counter electrode portion 16A and a second extraction portion 16B. The second counter electrode portion 16A extends along another portion of the outer periphery 70a of the coloring region 70 (a portion of the outer periphery 70a of the coloring region 70 that is different from the portion where the first counter electrode portion 15A is formed). Specifically, the second counter electrode portion 16A extends along a portion of the outer periphery 70a of the coloring region 70 on the +X direction side. The second counter electrode portion 16A is formed away from the outer periphery 70a of the coloring region 70.

[0717] The second counter electrode portion 16A is located on the opposite side to the first counter electrode portion 15A with respect to the colored region 70. The second counter electrode portion 16A is located at a position facing the first counter electrode portion 15A in the X direction.

[0718] The second auxiliary electrode 16 is provided in a stacked 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 portion 18. The second auxiliary electrode 16 electrically connects the second transparent electrode 14 to the second conductive portion 18 (refer to Fig.26 ).

[0719] The resistance value of the second auxiliary electrode 16 is lower than the resistance value of the second transparent electrode 14. That is, the resistance of the second auxiliary electrode 16 is lower than the resistance of the second transparent electrode 14. Therefore, it is possible to impart high conductivity 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-resistance wiring electrically connected to the electrochromic element 60 (see Fig.26 ).

[0720] like Fig.25 As shown, the second counter electrode portion 16A includes the third extending portion 3 and the fourth extending portion 4 .

[0721] The third extension portion 3 is formed from the middle position (the position where the second lead-out portion 16B is formed) in the longitudinal direction of the second counter electrode portion 16A (the second base portion) as a starting point along the outer peripheral edge 70a of the colored region 70 to one side ( Fig.25 The third extension portion 3 is a linear portion extending in the +Y direction ( Fig.25 The third extension portion 3 is bent so that the inclination angle (inclination angle with respect to the X direction) gradually decreases toward the front end.

[0722] The length of the third extending portion 3 can be set to, for example, 5 mm or more and 20 mm or less. If the length of the third extending portion 3 is within this range, a voltage can be uniformly applied over a wide range of the colored region 70 .

[0723] like Fig.30 As shown, in a plan view, the width W3 of the portion 3A (front end portion 3A) of the third extension portion 3 including at least the front end 3a (one end) is greater than or equal to 0.1 mm and less than or equal to 1.0 mm. Since the width W3 of the front end portion 3A is greater than or equal to 0.1 mm, the resistance can be reduced. Therefore, the coloring and color removal in the colored area 70 can be performed without delay. Since the width W3 of the front end portion 3A is less than or equal to 1.0 mm, it is not easy to be visually recognized from the outside. Therefore, the third extension portion 3 is not easy to be conspicuous. Therefore, the beauty of the sunglasses 100 can be improved. The width W3 may also be greater than or equal to 0.3 mm and less than or equal to 1.0 mm. The width W3 is preferably greater than or equal to 0.3 mm and less than or equal to 0.7 mm.

[0724] In the present embodiment, the front end portion 3A of the third extension portion 3 is a length portion having a constant width (width W3).

[0725] The front end portion of the third extension portion 3 is not limited to a shape having a constant width, and may also be a shape whose width gradually narrows toward the front end. In this case, the width of the front end portion may be an average width of a prescribed length range (e.g., a length range of 5 mm from the front end). The width of the front end portion may also be the width of the front end.

[0726] In a top view, the distance W4 between the second counter electrode portion 16A (for example, the third extension portion 3 and the fourth extension portion 4) and the outer peripheral edge 70a of the coloring region 70 is preferably greater than 0.25 mm. If the distance W4 is greater than 0.25 mm, the second counter electrode portion 16A is located sufficiently far away from the coloring region 70. Therefore, the influence from the coloring region 70 can be suppressed, thereby suppressing the degradation of the second counter electrode portion 16A. If the distance W4 is greater than 0.25 mm, the influence from the outside on the coloring region 70 can be reduced. Therefore, the characteristics of the coloring region 70 can be improved. The distance W4 is preferably greater than 0.5 mm. The distance W4 can also be, for example, less than 2 mm.

[0727] like Fig.25 As shown, the fourth extension portion 4 is formed from the middle position (the position where the second extraction portion 16B is formed) (the second base) in the length direction of the second counter electrode portion 16A as a starting point along the outer peripheral edge 70a of the colored region 70 to the other side ( Fig.25 The fourth extension portion 4 is close to the first counter electrode portion 15A (more specifically, the second extension portion 2) and extends in the -Y direction ( Fig.25 The fourth extension portion 4 is curved so that the inclination angle (the inclination angle with respect to the X direction) gradually decreases toward the front end.

[0728] In a plan view, the width of at least the portion (front end portion) of the fourth extension portion 4 including the front end (one end) may be 0.1 mm or more and 1.0 mm or less. Since the width of the front end portion is 0.1 mm or more, the resistance can be reduced. Therefore, the coloring and color removal in the colored area 70 can be performed without delay. Since the width of the front end portion is 1.0 mm or less, it is difficult to be visually recognized from the outside. Therefore, the fourth extension portion 4 is not easily conspicuous. Therefore, the aesthetics of the sunglasses 100 can be improved. The width of the front end portion may also be 0.3 mm or more and 1.0 mm or less.

[0729] In the present embodiment, the front end portion of the fourth extension portion 4 is a length portion having a constant width.

[0730] The front end portion of the fourth extension portion 4 is not limited to a shape having a constant width, and may also be a shape whose width gradually narrows toward the front end. In this case, the width of the front end portion may be an average width of a prescribed length range (e.g., a length range of 5 mm from the front end). The width of the front end portion may also be the width of the front end.

[0731] The fourth extension portion 4 may be longer than the third extension portion 3 or may be the same length as the third extension portion 3. The dimension of the fourth extension portion 4 in the Y direction may be larger than the dimension of the third extension portion 3 in the Y direction.

[0732] Since the second counter electrode portion 16A includes the third extension portion 3 and the fourth extension portion 4, a voltage can be uniformly applied over a wide range of the coloring region 70. Therefore, sufficient color development (coloring) and color elimination can be achieved over a wide range of the coloring region 70.

[0733] The first extension part 1 and the third extension part 3 are arranged opposite to each other in the X direction. The first extension part 1 and the third extension part 3 extend in directions approaching each other. The front ends of the first extension part 1 and the third extension part 3 are opposite to each other. The second extension part 2 and the fourth extension part 4 are arranged opposite to each other in the X direction. The second extension part 2 and the fourth extension part 4 extend in directions approaching each other. The front ends of the second extension part 2 and the fourth extension part 4 are opposite to each other.

[0734] like Fig.28 As shown, the second extraction portion 16B protrudes from a portion of the outer peripheral edge of the second counter electrode portion 16A in the +X direction (the direction away from the colored region 70). The second extraction portion 16B is formed, for example, at a position overlapping with the second protruding portion 14B of the second transparent electrode 14. The second extraction portion 16B is formed at a position corresponding to the connecting portion (the portion where the middle beam portion 22 or the temple portion 23 is connected to the frame portion 21).

[0735] As the constituent material of the first auxiliary electrode 15 and the second auxiliary electrode 16, for example, metals such as silver, aluminum, copper, chromium and molybdenum can be cited. As the constituent material of the first auxiliary electrode 15 and the second auxiliary electrode 16, conductive ink can also be used. As the constituent material of the first auxiliary electrode 15 and the second auxiliary electrode 16, one of them can be used, or two or more of them can be used in combination. The first auxiliary electrode 15 and the second auxiliary electrode 16 can be formed, for example, by sputtering, evaporation, etc. The first auxiliary electrode 15 and the second auxiliary electrode 16 can also be formed by printing using conductive ink.

[0736] 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, and more preferably 5 nm or more and 50 nm or less.

[0737] The total thickness of the electrochromic sheet 150 is preferably 0.3 mm to 10.0 mm, more preferably 0.5 mm to 5.0 mm. By setting the total thickness of the electrochromic sheet 150 within the above range, the electrochromic sheet 150 can be given excellent strength, and the thermoformability when the electrochromic sheet 150 is formed into the curved sheet 120 can be improved.

[0738] In the electrochromic sheet 150 of the present embodiment, since the widths W1 and W3 of the front end portion 1A of the first extension portion 1 of the first counter electrode portion 15A and the front end portion 3A of the third extension portion 3 of the second counter electrode portion 16A are 0.1 mm or more and 1.0 mm or less, the coloring and fading in the coloring region 70 can be performed without delay, and the first auxiliary electrode 15 and the second auxiliary electrode 16 are not conspicuous. Therefore, the electrochromic sheet 150 having good electrochromic characteristics and excellent appearance can be realized.

[0739] The electrochromic sheet 150 includes: a first electrochromic layer 63, which changes color by oxidation reaction; a second electrochromic layer 64, which changes color by reduction reaction; and an electrolyte layer 65. The electrochromic sheet 150 includes two electrochromic layers, so that the driving voltage of the electrochromic element 60 can be suppressed. Therefore, the repeated durability of the electrochromic element 60 can be improved.

[0740] In the electrochromic sheet 150, the first counter electrode portion 15A has a first extension portion 1 and a second extension portion 2. The second counter electrode portion 16A has a third extension portion 3 and a fourth extension portion 4. In the electrochromic sheet 150, the widths W1 and W3 of the front end portions 1A and 3A of the first extension portion 1 and the third extension portion 3 are within the range (0.1 mm or more and 1.0 mm or less). In the electrochromic sheet 150, since the first extension portion 1 and the third extension portion 3 are not conspicuous, it is advantageous in terms of design and the like.

[0741] If the distances W2 and W4 between the first counter electrode portion 15A and the second counter electrode portion 16A and the outer peripheral edge 70a of the colored region 70 are 0.25 mm or more, the first counter electrode portion 15A and the second counter electrode portion 16A are located sufficiently away from the colored region 70. Therefore, the influence from the colored region 70 can be suppressed, and degradation of the first counter electrode portion 15A and the second counter electrode portion 16A can be suppressed.

[0742] The lens 30 and the sunglasses 100 exert the same effect as the electrochromic film 150 .

[0743] Although the electrochromic sheet, the eyeglass lens, and the eyeglasses according to the embodiments have been described, the present invention is not limited thereto.

[0744] For example, Fig. 27 The electrochromic sheet 150 shown 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 more (any number greater than two).

[0745] The electrochromic layer can change color as long as it undergoes at least one of an oxidation reaction and a reduction reaction. For example, the electrochromic layer can utilize only the color change based on the oxidation reaction, or can utilize only the color change based on the reduction reaction. The electrochromic layer can also be a structure that utilizes both oxidation reaction and reduction reaction to change color. The electrochromic sheet can be provided with an electrochromic layer that changes color through at least one of an oxidation reaction and a reduction reaction.

[0746] exist Fig.25 In the electrochromic sheet 150 shown, the widths W1 and W3 of the tip portions 1A and 3A of the first and third extension portions 1 and 3 are set to be 0.1 mm or more and 1.0 mm or less, but the electrochromic sheet of the embodiment is not limited to this structure.

[0747] In the first counter electrode portion, at least one of the first extension portion and the second extension portion may have a front end portion width within the range (0.1 mm or more and 1.0 mm or less). For example, the front end portion width of only one of the first extension portion and the second extension portion may be within the range, or the front end portions width of both the first extension portion and the second extension portion may be within the range.

[0748] In the second counter electrode portion, at least one of the third extension portion and the fourth extension portion may have a front end portion width within the range (0.1 mm or more and 1.0 mm or less). For example, the front end portion width of only one of the third extension portion and the fourth extension portion may be within the range, or the front end portions width of both the third extension portion and the fourth extension portion may be within the range.

[0749] The width of the tip portion may be set within the aforementioned range (0.1 mm or more and 1.0 mm or less) for at least one of the first extension portion 1, the second extension portion 2, the third extension portion 3, and the fourth extension portion 4. That is, the width of the tip portion may be set within the aforementioned range for one of the first extension portion 1, the second extension portion 2, the third extension portion 3, and the fourth extension portion 4, or for more than one of the first extension portion 1, the second extension portion 2, the third extension portion 3, and the fourth extension portion 4.

[0750] constitute Fig. 27 The layers of the electrochromic element 60 constituting the electrochromic sheet 150 shown may be replaced with other structures that perform the same function. The electrochromic sheet 150 may further include other layers (intermediate layers) between the substrates 11 and 12 and the electrochromic element 60 .

[0751] (Sixth embodiment)

[0752] The auxiliary electrode is required to suppress degradation due to oxidation and the like. Therefore, a structure for protecting the auxiliary electrode may be provided in the electrochromic sheet. However, it is not easy to protect the auxiliary electrode without damaging the aesthetics of the electrochromic sheet.

[0753] 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 appearance.

[0754] (Solution 1)

[0755] An electrochromic sheet, wherein the sheet is used for a lens for spectacles, and the electrochromic sheet comprises:

[0756] 1st substrate;

[0757] a second substrate, arranged opposite to the first substrate;

[0758] An electrochromic element is disposed between the first substrate and the second substrate and forms a coloring area whose color changes by application of voltage;

[0759] An insulating sealing portion dividing the colored area;

[0760] a first auxiliary electrode electrically connected to the electrochromic element; and

[0761] a second auxiliary electrode electrically connected to the electrochromic element,

[0762] The electrochromic element has:

[0763] a first transparent electrode electrically connected to the first auxiliary electrode;

[0764] a second transparent electrode electrically connected to the second auxiliary electrode; and

[0765] One or more electrochromic layers change color through at least one of an oxidation reaction and a reduction reaction,

[0766] The first auxiliary electrode has a lower resistance than the first transparent electrode and has a first counter electrode portion extending along a portion of an outer periphery of the colored region.

[0767] The second auxiliary electrode has a lower resistance than the second transparent electrode and has a second counter electrode portion extending along another portion of the outer periphery of the colored region.

[0768] The second counter electrode portion is located on the opposite side of the colored region from the first counter electrode portion and faces the first counter electrode portion.

[0769] A width of a sealed region in the sealed portion, which is a region from the outer peripheral edge of the colored region to the outer peripheral edge of the spectacle lens, is 1 mm or more and 3 mm or less.

[0770] (Solution 2)

[0771] The electrochromic sheet according to Scheme 1, wherein:

[0772] 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.

[0773] The electrochromic element further comprises an electrolyte layer filled between the first electrochromic layer and the second electrochromic layer.

[0774] The first electrochromic layer contains a material that changes color through an oxidation reaction, and the second electrochromic layer contains a material that changes color through a reduction reaction.

[0775] (Solution 3)

[0776] The electrochromic sheet according to Scheme 1, wherein:

[0777] In a plan view, the distance between the first counter electrode portion and the second counter electrode portion and the outer periphery of the colored region is greater than 0.25 mm.

[0778] The distance between the first counter electrode portion and the second counter electrode portion and the outer peripheral edge of the eyeglass lens in a plan view is 0.25 mm or more.

[0779] (Solution 4)

[0780] A spectacles lens comprising the electrochromic sheet according to any one of claims 1 to 3.

[0781] (Scheme 5)

[0782] A pair of spectacles comprising the spectacles lens according to claim 4.

[0783] According to one aspect of the present invention, it is possible to provide an electrochromic sheet, an eyeglass lens, and eyeglasses capable of suppressing degradation of an auxiliary electrode without impairing aesthetics.

[0784] <Electrochromic film>

[0785] Fig.31 1 is a plan view showing the electrochromic sheet 150 . Fig.32 Yes means Fig.31 Schematic diagram of the AA section is shown. Fig.33 2 is a schematic diagram showing a cross section of the electrochromic element 60 .

[0786] like Fig.32 As shown, the electrochromic sheet 150 includes a first substrate 11 , a second substrate 12 , a sealing portion 55 , an electrochromic element 60 , a first conductive portion 17 , a second conductive portion 18 , a first auxiliary electrode 15 , and a second auxiliary electrode 16 .

[0787] The first substrate 11 and the second substrate 12 are the outermost layers of the electrochromic sheet 150. The second substrate 12 and the first substrate 11 are arranged opposite to each other. The first substrate 11 and the second substrate 12 have the function of a protective layer for protecting 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.

[0788] As the transparent resin constituting the first substrate 11 and the second substrate 12, for example, acrylic resin, polystyrene resin, polyethylene resin, polypropylene resin, polyester resin (polyethylene terephthalate (PET), polyethylene naphthalate (PEN) etc.), polycarbonate resin, polyamide resin, cycloolefin resin, vinyl chloride resin, polyacetal resin, triacetyl cellulose (TAC) etc. can be cited. As the transparent resin, one of them can be used, or two or more of them can be used in combination. As the transparent resin, polycarbonate resin or polyamide resin is preferred.

[0789] Since the polycarbonate resin has high transparency (light transmittance), mechanical strength (rigidity, etc.) and heat resistance, it is possible to improve the transparency, impact resistance and heat resistance of the first substrate 11 and the second substrate 12. As the polycarbonate resin, an aromatic polycarbonate resin is preferred. An aromatic polycarbonate resin has an aromatic ring in its main chain. By using an aromatic polycarbonate resin, the first substrate 11 and the second substrate 12 having excellent strength can be obtained.

[0790] Aromatic polycarbonate resins are synthesized, for example, by an interfacial polycondensation reaction of bisphenol and phosgene, an ester exchange reaction of bisphenol and diphenyl carbonate, etc. Examples of bisphenols include bisphenol (modified bisphenol) and bisphenol A, which are the origin of the repeating unit of the polycarbonate represented by formula (1A).

[0791]

[0792] (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. p is the number of repeating units.)

[0793] In addition, examples of bisphenols that are the origin of repeating units of the polycarbonate represented by 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-dicyclohexyl-1,4-bis(4-hydroxyphenyl)benzene, 1,1'-bis(4-hydroxy-3-methylphenyl)cyclohexane, and 2,2'-bis(4-hydroxy-3-methylphenyl)propane. As the bisphenol, one of these may be used, or two or more of them may be used in combination.

[0794] The polycarbonate resin preferably contains a bisphenol-type polycarbonate resin having a skeleton derived from bisphenol as a main component. By using the bisphenol-type polycarbonate resin, the first substrate 11 and the second substrate 12 exhibit excellent strength.

[0795] 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.

[0796] 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 dyes include acid dyes, direct dyes, reactive dyes, and basic dyes. As dyes, one of these may be used, or two or more of them may be used in combination.

[0797] The first substrate 11 and the second substrate 12 may contain additives such as antioxidants, fillers, plasticizers, light stabilizers, ultraviolet absorbers, heat absorbers, flame retardants, etc. as necessary. The first substrate 11 and the second substrate 12 may be stretched or unstretched.

[0798] The refractive index of the first substrate 11 and the second substrate 12 at a wavelength of 589 nm is preferably 1.3 to 1.8, more preferably 1.4 to 1.65. 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 improved.

[0799] The average thickness of the first substrate 11 and the second substrate 12 is, for example, not less than 0.05 mm and not more than 10.0 mm, or preferably not less than 0.3 mm and not more than 5.0 mm.

[0800] The electrochromic element 60 is capable of being switched by the switch 25 (refer to Fig.23 ) can be switched between coloring (coloring) and fading at any time by switching the light emitting element on / off. The electrochromic element 60 (more specifically, the main part 61) forms a coloring area 70 divided by the sealing part 55. The electrochromic element 60 is provided between the first substrate 11 and the second substrate 12.

[0801] like Fig.33 As shown, 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 .

[0802] 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 when a voltage is applied.

[0803] 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 .

[0804] The first transparent electrode 13 and the second transparent electrode 14 are connected to each other by switches 25 (refer to Fig.23 ) is switched to supply or accept electrons when a positive voltage or a negative voltage is applied to the electrochromic element 60.

[0805] The first transparent electrode 13 and the second transparent electrode 14 are transparent. The constituent materials of the first transparent electrode 13 and the second transparent electrode 14 are conductive materials. Examples of the constituent materials of the first transparent electrode 13 and the second transparent electrode 14 include ITO (Indium Tin Oxide), FTO (F-doped Tin Oxide), ATO (Antimony Tin Oxide), IZO (Indium Zinc Oxide), In2O3, SnO2, SnO2 containing Sb, ZnO containing Al and other oxides. As the constituent materials of the first transparent electrode 13 and the second transparent electrode 14, one of them may be used, or two or more thereof may be used in combination.

[0806] The thickness of the first transparent electrode 13 and the second transparent electrode 14 is specified to obtain a resistance value required 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 set to 50 nm or more and 200 nm or less, preferably 50 nm or more and 150 nm or less, and more preferably 60 nm or more and 130 nm or less.

[0807] The first electrochromic layer 63 (electrochromic layer) is a layer whose color changes. The first electrochromic layer 63 contains a material colored by an oxidation reaction as a main material. As a material colored by an oxidation reaction, for example, a polymer of a radical polymerizable compound having a triarylamine structure, a bisacridone compound, triphenylamine, benzidine, a Prussian blue type complex, and nickel oxide can be cited. As a material colored by an oxidation reaction, one of them can be used, or two or more can be used in combination.

[0808] Examples of the polymer of the radically polymerizable compound having a triarylamine structure include polymers described in JP-A-2016-45464 and JP-A-2020-138925.

[0809] Examples of the Prussian blue type complex include Fe(III)4[Fe(II)(CN)6]3.

[0810] Among these, a polymer of a radical polymerizable compound having a triarylamine structure is preferred. By using this polymer, an electrochromic element can be operated at a constant voltage, and excellent in repetition durability and high contrast can be obtained.

[0811] In addition, the polymer of the radical polymerizable compound having a triarylamine structure may contain another radical polymerizable compound different from the radical polymerizable compound having a triarylamine structure. The radical polymerizable compound having a triarylamine structure and the other radical polymerizable compound may be cross-linked.

[0812] The average thickness of the first electrochromic layer 63 is preferably 0.1 μm or more and 30 μm or less, and more preferably 0.4 μm or more and 10 μm or less.

[0813] The second electrochromic layer 64 (electrochromic layer) is a layer whose color changes. The second electrochromic layer 64 contains a material colored by a reduction reaction as a main material. As a material colored by a reduction reaction, it is preferred to use a material of the same color tone as the first electrochromic layer 63. Thus, the maximum color concentration can be increased, so that the contrast can be improved. As a material colored by a reduction reaction, a material of a different color tone from the first electrochromic layer 63 can be used. At this time, color mixing can be performed.

[0814] By coloring both the two electrochromic layers 63 and 64, the redox pigments of the electrochromic layers 63 and 64 can be simultaneously colored. Therefore, the coloring speed can be increased. By coloring both the electrochromic layers 63 and 64, the driving voltage of the electrochromic element 60 can be suppressed. Therefore, the repeated durability of the electrochromic element 60 can be improved.

[0815] Examples of the material that is 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 alone, or two or more of these may be used in combination.

[0816] As inorganic electrochromic compounds, for example, tungsten oxide, molybdenum oxide, iridium oxide, titanium oxide, etc. can be cited. Among them, tungsten oxide is preferred. Tungsten oxide has a low reduction potential, so the coloring / decoloring potential is low. Tungsten oxide is an inorganic material, so it is excellent in durability.

[0817] As organic electrochromic compounds, for example, low molecular weight organic electrochromic compounds such as azobenzene, anthraquinone, diarylethene, dihydropyrene, dipyridine, styryl, styryl spiropyran, spirooxazine, spirothiany, thioindigo, tetrathiafulvalene, terephthalic acid, triphenylmethane, triphenylamine, naphthopyran, viologen, pyrazoline, phenazine, phenylenediamine, phenoxazine, phenothiazine, phthalocyanine, fluorane, fulgide, benzopyran, and metallocene can be cited. Among them, viologen compounds and dipyridine compounds are preferred. The color development / color elimination potential of viologen compounds and dipyridine compounds is low, showing a good color value.

[0818] Examples of the viologen compounds include compounds described in Japanese Patent No. 3955641 and Japanese Patent Application Laid-Open No. 2007-171781, etc. Examples of the bipyridine compounds include compounds described in Japanese Patent Application Laid-Open No. 2007-171781 and Japanese Patent Application Laid-Open No. 2008-116718, etc.

[0819] Examples of the conductive polymer include polypyrrole, polythiophene, polyaniline, and derivatives thereof.

[0820] 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. If the average thickness of the second electrochromic layer 64 is 0.2 μm or more, the color concentration can be improved. If the average thickness of the second electrochromic layer 64 is 5.0 μm or less, the manufacturing cost can be suppressed. If the average thickness of the second electrochromic layer 64 is 5.0 μm or less, it is not easy to cause a decrease in visibility due to coloring.

[0821] 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 ion conductivity.

[0822] 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 bases. The counter ions (anions) of the electrolyte include halogens, thiocyanate ions (SCN - ), chlorate ion (ClO3 - ), perchlorate ion (ClO4 - ), tetrafluoroborate ion (BF4 - ), hexafluorophosphate ion (PF6 - ), trifluoromethanesulfonate ion (CF3SO3 - ), trifluoroacetate ion (CF3COO - ), bis(fluorosulfonyl)imide (N(SO2F)2 - ).

[0823] As such an electrolyte, specifically, LiClO4, LiBF4, LiAsF6, LiPF6, LiCF3SO3, LiCF3COO, KCl, NaClO3, NaCl, NaBF4, NaSCN, KBF4, Mg(ClO4)2, Mg(BF4)2, etc. can be cited. As the electrolyte, one of them can be used, or two or more of them can be used in combination.

[0824] As the material of the electrolyte, an ionic liquid can also be used. Among ionic liquids, an organic ionic liquid has a molecular structure that shows liquid in a wide temperature range including room temperature, and is therefore easy to handle.

[0825] Examples of the cationic component of the organic ionic liquid include imidazole derivatives such as N,N-dimethylimidazolium salt, N,N-methylethylimidazolium salt, and N,N-methylpropylimidazolium salt; pyridinium derivatives such as N,N-dimethylpyridinium salt, and N,N-methylpropylpyridinium salt; and aliphatic quaternary ammonium systems such as trimethylpropylammonium salt, trimethylhexylammonium salt, and triethylhexylammonium salt. As the anionic component, it is preferred to use a fluorine-containing compound in consideration of the stability in the atmosphere. Examples of the anionic component include BF4 - CF3SO3 - PF4 - 、(CF3SO2)2N - wait.

[0826] As a material of the electrolyte, an ionic liquid in which a cationic component and an anionic component are combined is preferable.

[0827] The ionic liquid can be directly dissolved in any one of the photopolymerizable monomers, oligomers and liquid crystal materials. In addition, when the solubility of the ionic liquid in these materials is low, a solution prepared by dissolving the ionic liquid in a small amount of solvent in advance can be mixed with any one of the photopolymerizable monomers, oligomers and liquid crystal materials.

[0828] Examples of the solvent include propylene carbonate, acetonitrile, γ-butyrolactone, ethylene carbonate, sulfolane, dioxolane, tetrahydrofuran, 2-methyltetrahydrofuran, dimethyl sulfoxide, 1,2-dimethoxyethane, 1,2-ethoxymethoxyethane, polyethylene glycol, alcohols, and mixed solvents thereof.

[0829] The electrolyte may be a low-viscosity liquid. The electrolyte may be in various forms such as a gel, a polymer cross-linked type, a liquid crystal dispersion type, etc. The electrolyte is preferably formed into a gel or solid state. Thus, it is possible to improve the element strength or reliability of the electrochromic element 60.

[0830] As a method for making the electrolyte layer 65 solid, for example, a method of retaining a liquid containing an electrolyte and a solvent in a resin is preferred. In this way, both high ion conductivity and solid strength of the electrolyte layer 65 can be obtained. As the resin, for example, a photocurable resin is preferred. In this way, compared with the case where the solid electrolyte layer 65 is obtained by thermal polymerization or solvent vaporization, the solid electrolyte layer 65 can be obtained at a low temperature and in a short time.

[0831] 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 further preferably 30 μm or more and 70 μm or less.

[0832] In addition, an intermediate layer such as an insulating porous layer or a protective layer may be provided between the layers between the first transparent electrode 13 and the second transparent electrode 14 .

[0833] like Fig.32 As shown, the sealing portion 55 is disposed between the first substrate 11 and the second substrate 12 and defines the coloring region 70. The sealing portion 55 has insulating properties and surrounds the coloring region 70 in a plan view.

[0834] The material constituting the sealing portion 55 is not particularly limited as long as it is a transparent insulating material, and examples thereof include resin materials such as acrylic resin and epoxy resin; inorganic oxides such as silicon oxide (SiO2), silicon oxynitride (SiON), and aluminum oxide (Al2O3); and the like.

[0835] The thickness of the sealing portion 55 is determined according to the thickness of the electrochromic element 60. The average thickness of the sealing portion 55 is preferably 20 μm to 100 μm, more preferably 30 μm to 80 μm, and more preferably 40 μm to 60 μm.

[0836] 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 portion 17 is formed in contact with the first lead-out portion 15B (refer to Fig.34 ) penetrates the sealing portion 55 in the thickness direction at a position where the first conductive portion 17 overlaps with the first auxiliary electrode 15. 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 position on the side of the middle beam portion 22 and the side of the temple portion 23, for example.

[0837] 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 first conductive portion 17 with respect to the colored region 70. The second conductive portion 18 is provided on the second lead-out portion 16B (refer to Fig.34 ) penetrates the sealing portion 55 in the thickness direction at a position where the second conductive portion 18 overlaps. The second conductive portion 18 is electrically connected to the second transparent electrode 14 via the second auxiliary electrode 16. The second conductive portion 18 is electrically connected to the second transparent electrode 14 at another position on the side of the middle beam portion 22 and the side of the temple portion 23, for example.

[0838] In this way, the first conductive portion 17 is electrically connected to the first transparent electrode 13 at one position on the side of the middle beam portion 22 and the side of the temple portion 23. The second conductive portion 18 is electrically connected to the second transparent electrode 14 at the other position on the side of the middle beam portion 22 and the side of the temple portion 23. Therefore, a voltage can be applied between the first transparent electrode 13 and the second transparent electrode 14 via the first conductive portion 17 and the second conductive portion 18. The first conductive portion 17 and the second conductive portion 18 function as connection terminals when a voltage is applied 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 develops or loses color.

[0839] After step [3] or after step [4], by applying a voltage between the first transparent electrode 13 and the second transparent electrode 14 via the first conductive portion 17 and the second conductive portion 18 , the electrochromic element 60 can be easily inspected.

[0840] As a constituent material of the first conductive portion 17 and the second conductive portion 18, for example, a conductive paste such as a silver paste can be cited. The constituent material of the first conductive portion 17 and the second conductive portion 18 may be a material containing a metal such as gold, copper, or an alloy thereof.

[0841] The average thickness of the first conductive portion 17 and the second conductive portion 18 are each independently preferably 20 μm or more and 100 μm or less, and more preferably 40 μm or more and 80 μm or less.

[0842] Fig.34 It is an exploded perspective view showing the electrochromic sheet 150 . Fig.35 is a top view of a portion of the electrochromic film 150 . Fig.35 yes Fig.31 Magnified view of region R1 in FIG. Fig.36 is a top view of a portion of the electrochromic film 150 . Fig.36 yes Fig.31 Magnified view of region R2 in FIG.

[0843] In the following description, the XYZ orthogonal coordinate system is used. Fig.34 As shown, the X direction is the direction connecting the first take-out portion 15B and the second take-out portion 16B in a plane along the surface of the first substrate 11. The Y direction is orthogonal to the X direction in a plane along the surface of the first substrate 11. The Z direction is orthogonal to both the X direction and the Y direction. A top view refers to an observation parallel to the Z direction. One of the X directions is called the "+X direction". The direction opposite to the +X direction is called the "-X direction". One of the Y directions is called the "+Y direction". The direction opposite to the +Y direction is called the "-Y direction".

[0844] exist Fig.34In FIG. 1 , the first transparent electrode 13 and the second transparent electrode 14 are shown in the shape of the lens 30 .

[0845] The first transparent electrode 13 includes, for example, a first main body portion 13A and a first protruding portion 13B. The first main body portion 13A is, for example, disposed parallel to the lens 30 (see FIG. 1 ). Fig.23 ). In a plan view, the first main body 13A may be, for example, circular, elliptical, etc. The first protrusion 13B protrudes in the -X direction (a direction away from the colored region 70) from a portion of the outer periphery of the first main body 13A on the -X direction side. The first protrusion 13B is formed at a position corresponding to the connecting portion (the portion where the middle beam portion 22 or the temple portion 23 is connected to the frame portion 21).

[0846] The second transparent electrode 14 includes, for example, a second main body portion 14A and a second protruding portion 14B. The second main body portion 14A is, for example, disposed parallel to the lens 30 (see FIG. 1 ). Fig.23 ). In a plan view, the second main body 14A may be, for example, circular, elliptical, etc. The second protrusion 14B protrudes in the +X direction (a direction away from the colored region 70) from a portion of the outer periphery of the second main body 14A on the +X direction side. The second protrusion 14B is formed at a position corresponding to the connecting portion (the portion where the middle beam portion 22 or the temple portion 23 is connected to the frame portion 21).

[0847] The first auxiliary electrode 15 includes a first counter electrode portion 15A and a first extraction portion 15B. The first counter electrode portion 15A extends along a portion of the outer periphery 70a of the coloring region 70. Specifically, the first counter electrode portion 15A extends along a portion on the -X direction side of the outer periphery 70a of the coloring region 70. The first counter electrode portion 15A is formed away from the outer periphery 70a of the coloring region 70.

[0848] The first auxiliary electrode 15 is stacked 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 portion 17. The first auxiliary electrode 15 electrically connects the first transparent electrode 13 to the first conductive portion 17 (see Fig.32 ).

[0849] The resistance value of the first auxiliary electrode 15 is lower than the resistance value of the first transparent electrode 13. That is, the resistance of the first auxiliary electrode 15 is lower than the resistance of the first transparent electrode 13. Therefore, it is possible to impart high conductivity 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-resistance wiring electrically connected to the electrochromic element 60 (see Fig.32 ).

[0850] like Fig.31 As shown, the first counter electrode portion 15A includes a first extending portion 1 and a second extending portion 2 .

[0851] The first extension portion 1 is formed from the middle position (the position where the first lead-out portion 15B is formed) of the first counter electrode portion 15A in the longitudinal direction as a starting point along the outer peripheral edge 70a of the colored region 70 to one side ( Fig.31 The first extension portion 1 is a linear portion extending in the +Y direction ( Fig.31 The first extension portion 1 is bent so that the inclination angle (inclination angle with respect to the X direction) gradually decreases toward the front end.

[0852] The length of the first extended portion 1 can be set to, for example, 5 mm or more and 20 mm or less. If the length of the first extended portion 1 is within this range, a voltage can be uniformly applied over a wide range of the colored region 70 .

[0853] like Fig.35 As shown, in a plan view, the width W1 of the portion 1A (front end portion 1A) of the first extension portion 1 including at least the front end 1a (one end) can be, for example, 0.1 mm or more and 1.0 mm or less. Since the width W1 of the front end portion 1A is 0.1 mm or more, the resistance can be reduced. Therefore, the coloring and color removal in the colored area 70 can be performed without delay. Since the width W1 of the front end portion 1A is 1.0 mm or less, it is not easy to be recognized from the outside. Therefore, the first extension portion 1 is not easy to be conspicuous. Therefore, the aesthetics of the sunglasses 100 can be improved. The width W1 can also 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.

[0854] In the present embodiment, the front end portion 1A of the first extension portion 1 is a length portion having a constant width (width W1 ).

[0855] The front end portion of the first extension portion 1 is not limited to a shape having a constant width, and may also be a shape whose width gradually narrows toward the front end. In this case, the width of the front end portion may be an average width of a specified length range (e.g., a length range of 5 mm from the front end). The width of the front end portion may also be the width of the front end.

[0856] In a top view, the distance W2 between the first counter electrode portion 15A (for example, the first extension portion 1 and the second extension portion 2) and the outer peripheral edge 70a of the coloring region 70 is preferably greater than 0.25 mm. If the distance W2 is greater than 0.25 mm, the first counter electrode portion 15A is located sufficiently far away from the coloring region 70. Therefore, the influence from the coloring region 70 can be suppressed, thereby suppressing the degradation of the first counter electrode portion 15A. If the distance W2 is greater than 0.25 mm, the influence from the outside on the coloring region 70 can be reduced. Therefore, the characteristics of the coloring region 70 can be improved. The distance W2 is preferably greater than 0.5 mm. The distance W2 can also be, for example, less than 2 mm.

[0857] like Fig.31 As shown, the second extension portion 2 is formed from the middle position (the position where the first extraction portion 15B is formed) (the first base) in the length direction of the first counter electrode portion 15A as a starting point along the outer peripheral edge 70a of the colored region 70 to the other side ( Fig.31 The second extension portion 2 is close to the second counter electrode portion 16A (more specifically, the fourth extension portion 4) and extends in the -Y direction ( Fig.31 The second extension portion 2 is curved so that the inclination angle (the inclination angle with respect to the X direction) gradually decreases toward the front end.

[0858] In a plan view, the width of at least the portion (front end portion) of the second extension portion 2 including the front end (one end) can be, for example, 0.1 mm or more and 1.0 mm or less. Since the width of the front end portion is 0.1 mm or more, the resistance can be reduced. Therefore, the coloring and color removal in the colored area 70 can be performed without delay. Since the width of the front end portion is 1.0 mm or less, it is difficult to be visually recognized from the outside. Therefore, the second extension portion 2 is not easily conspicuous. Therefore, the aesthetics of the sunglasses 100 can be improved. The width of the front end portion can also be 0.3 mm or more and 1.0 mm or less.

[0859] In the present embodiment, the front end portion of the second extension portion 2 is a length portion having a constant width.

[0860] The front end portion of the second extension portion 2 is not limited to a shape having a constant width, and may also be a shape whose width gradually narrows toward the front end. In this case, the width of the front end portion may be an average width of a specified length range (e.g., a length range of 5 mm from the front end). The width of the front end portion may also be the width of the front end.

[0861] The second extension portion 2 may be longer than the first extension portion 1 or may be the same length as the first extension portion 1. The dimension of the second extension portion 2 in the Y direction may be larger than the dimension of the first extension portion 1 in the Y direction.

[0862] Since the first counter electrode portion 15A includes the first extension portion 1 and the second extension portion 2, a voltage can be uniformly applied over a wide range of the coloring region 70. Therefore, sufficient color development (coloring) and color elimination can be achieved over a wide range of the coloring region 70.

[0863] like Fig.34 As shown in FIG. 1 , the first extraction portion 15B protrudes from a portion of the outer periphery of the first counter electrode portion 15A in the −X direction (the direction away from the colored region 70). The first extraction portion 15B is formed, for example, at a position overlapping with the first protruding portion 13B of the first transparent electrode 13. The first extraction portion 15B is formed at a position corresponding to the connecting portion (the portion where the middle beam portion 22 or the temple portion 23 is connected to the frame portion 21).

[0864] The second auxiliary electrode 16 includes a second counter electrode portion 16A and a second extraction portion 16B. The second counter electrode portion 16A extends along another portion of the outer periphery 70a of the coloring region 70 (a portion of the outer periphery 70a of the coloring region 70 that is different from the portion where the first counter electrode portion 15A is formed). Specifically, the second counter electrode portion 16A extends along a portion of the outer periphery 70a of the coloring region 70 on the +X direction side. The second counter electrode portion 16A is formed away from the outer periphery 70a of the coloring region 70.

[0865] The second counter electrode portion 16A is located on the opposite side to the first counter electrode portion 15A with respect to the colored region 70. The second counter electrode portion 16A is located at a position facing the first counter electrode portion 15A in the X direction.

[0866] The second auxiliary electrode 16 is stacked 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 portion 18. The second auxiliary electrode 16 electrically connects the second transparent electrode 14 to the second conductive portion 18 (see Fig.32 ).

[0867] The resistance value of the second auxiliary electrode 16 is lower than the resistance value of the second transparent electrode 14. That is, the resistance of the second auxiliary electrode 16 is lower than the resistance of the second transparent electrode 14. Therefore, it is possible to impart high conductivity 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-resistance wiring electrically connected to the electrochromic element 60 (see Fig.32 ).

[0868] like Fig.31 As shown, the second counter electrode portion 16A includes the third extending portion 3 and the fourth extending portion 4 .

[0869] The third extension portion 3 is formed from the middle position (the position where the second lead-out portion 16B is formed) in the longitudinal direction of the second counter electrode portion 16A (the second base portion) as a starting point along the outer peripheral edge 70a of the colored region 70 to one side ( Fig.31 The third extension portion 3 is a linear portion extending in the +Y direction ( Fig.31 The third extension portion 3 is bent so that the inclination angle (inclination angle with respect to the X direction) gradually decreases toward the front end.

[0870] The length of the third extending portion 3 can be set to, for example, 5 mm or more and 20 mm or less. If the length of the third extending portion 3 is within this range, a voltage can be uniformly applied over a wide range of the colored region 70 .

[0871] like Fig.36 As shown, in a plan view, the width W3 of the portion 3A (front end portion 3A) of the third extension portion 3 including at least the front end 3a (one end) can be, for example, 0.1 mm or more and 1.0 mm or less. Since the width W3 of the front end portion 3A is 0.1 mm or more, the resistance can be reduced. Therefore, the coloring and color removal in the colored area 70 can be performed without delay. Since the width W3 of the front end portion 3A is 1.0 mm or less, it is not easy to be recognized from the outside. Therefore, the third extension portion 3 is not easy to be conspicuous. Therefore, the beauty of the sunglasses 100 can be improved. The width W3 can also 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.

[0872] In the present embodiment, the front end portion 3A of the third extension portion 3 is a length portion having a constant width (width W3).

[0873] The front end portion of the third extension portion 3 is not limited to a shape having a constant width, and may also be a shape whose width gradually narrows toward the front end. In this case, the width of the front end portion may be an average width of a prescribed length range (e.g., a length range of 5 mm from the front end). The width of the front end portion may also be the width of the front end.

[0874] In a top view, the distance W4 between the second counter electrode portion 16A (for example, the third extension portion 3 and the fourth extension portion 4) and the outer peripheral edge 70a of the coloring region 70 is preferably greater than 0.25 mm. If the distance W4 is greater than 0.25 mm, the second counter electrode portion 16A is located sufficiently far away from the coloring region 70. Therefore, the influence from the coloring region 70 can be suppressed, thereby suppressing the degradation of the second counter electrode portion 16A. If the distance W4 is greater than 0.25 mm, the influence from the outside on the coloring region 70 can be reduced. Therefore, the characteristics of the coloring region 70 can be improved. The distance W4 is preferably greater than 0.5 mm. The distance W4 can also be, for example, less than 2 mm.

[0875] like Fig.31 As shown, the fourth extension portion 4 is formed from the middle position (the position where the second extraction portion 16B is formed) (the second base) in the length direction of the second counter electrode portion 16A as a starting point along the outer peripheral edge 70a of the colored region 70 to the other side ( Fig.31 The fourth extension portion 4 is close to the first counter electrode portion 15A (more specifically, the second extension portion 2) and extends in the -Y direction ( Fig.31 The fourth extension portion 4 is curved so that the inclination angle (the inclination angle with respect to the X direction) gradually decreases toward the front end.

[0876] In a plan view, the width of the portion (front end portion) of the fourth extension portion 4 including at least the front end (one end) can be, for example, 0.1 mm or more and 1.0 mm or less. Since the width of the front end portion is 0.1 mm or more, the resistance can be reduced. Therefore, the coloring and color removal in the colored area 70 can be performed without delay. Since the width of the front end portion is 1.0 mm or less, it is difficult to be visually recognized from the outside. Therefore, the fourth extension portion 4 is not easily conspicuous. Therefore, the aesthetics of the sunglasses 100 can be improved. The width of the front end portion can also be 0.3 mm or more and 1.0 mm or less.

[0877] In the present embodiment, the front end portion of the fourth extension portion 4 is a length portion having a constant width.

[0878] The front end portion of the fourth extension portion 4 is not limited to a shape having a constant width, and may also be a shape whose width gradually narrows toward the front end. In this case, the width of the front end portion may be an average width of a prescribed length range (e.g., a length range of 5 mm from the front end). The width of the front end portion may also be the width of the front end.

[0879] The fourth extension portion 4 may be longer than the third extension portion 3 or may be the same length as the third extension portion 3. The dimension of the fourth extension portion 4 in the Y direction may be larger than the dimension of the third extension portion 3 in the Y direction.

[0880] Since the second counter electrode portion 16A includes the third extension portion 3 and the fourth extension portion 4, a voltage can be uniformly applied over a wide range of the coloring region 70. Therefore, sufficient color development (coloring) and color elimination can be achieved over a wide range of the coloring region 70.

[0881] The first extension part 1 and the third extension part 3 are arranged opposite to each other in the X direction. The first extension part 1 and the third extension part 3 extend in directions approaching each other. The front ends of the first extension part 1 and the third extension part 3 are opposite to each other. The second extension part 2 and the fourth extension part 4 are arranged opposite to each other in the X direction. The second extension part 2 and the fourth extension part 4 extend in directions approaching each other. The front ends of the second extension part 2 and the fourth extension part 4 are opposite to each other.

[0882] like Fig.34 As shown, the second extraction portion 16B protrudes from a portion of the outer peripheral edge of the second counter electrode portion 16A in the +X direction (the direction away from the colored region 70). The second extraction portion 16B is formed, for example, at a position overlapping with the second protruding portion 14B of the second transparent electrode 14. The second extraction portion 16B is formed at a position corresponding to the connecting portion (the portion where the middle beam portion 22 or the temple portion 23 is connected to the frame portion 21).

[0883] As the constituent material of the first auxiliary electrode 15 and the second auxiliary electrode 16, for example, metals such as silver, aluminum, copper, chromium and molybdenum can be cited. As the constituent material of the first auxiliary electrode 15 and the second auxiliary electrode 16, conductive ink can also be used. As the constituent material of the first auxiliary electrode 15 and the second auxiliary electrode 16, one of them can be used, or two or more of them can be used in combination. The first auxiliary electrode 15 and the second auxiliary electrode 16 can be formed, for example, by sputtering, evaporation, etc. The first auxiliary electrode 15 and the second auxiliary electrode 16 can also be formed by printing using conductive ink.

[0884] 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, and more preferably 5 nm or more and 50 nm or less.

[0885] The total thickness of the electrochromic sheet 150 is preferably 0.3 mm to 10.0 mm, more preferably 0.5 mm to 5.0 mm. By setting the total thickness of the electrochromic sheet 150 within the above range, the electrochromic sheet 150 can be given excellent strength, and the thermoformability when the electrochromic sheet 150 is formed into the curved sheet 120 can be improved.

[0886] As described above, the electrochromic sheet 150 is laminated with the resin layer 35 (refer to Fig.24 (D)), cut into the same shape as the frame portion 21 (reference Fig.23 ) corresponding to the lens 30. Fig.31 , Fig.35 and Fig.36 The virtual line shown represents the outer periphery 30 a of the lens 30 .

[0887] like Fig.35 and Fig.36 As shown, the area from the outer periphery 70a of the colored area 70 to the outer periphery 30a of the lens 30 in the sealing portion 55 that divides the colored area 70 is referred to as the sealing area 56. The sealing area 56 is an annular area surrounding the colored area 70 (refer to Fig.31 The sealing region 56 has a function of protecting the colored region 70. The sealing region 56 also has a function of serving as an adhesive layer for adhering the plurality of layers constituting the electrochromic sheet 150 and maintaining their stacked state. The outer periphery 30a is the outer periphery of the sealing region 56.

[0888] like Fig.35 and Fig.36 As shown, the width W5 of the sealing area 56 is 1 mm or more and 3 mm or less. The sealing area 56 is preferably within this range over the entire circumference. The width W5 of the sealing area 56 is preferably 1.5 mm or more and 2.5 mm or less.

[0889] Since the width W5 of the sealing area 56 is greater than 1 mm, the infiltration of moisture and the like from the outside can be limited to protect the first counter electrode portion 15A and the second counter electrode portion 16A. That is, it is possible to suppress the degradation of the first counter electrode portion 15A and the second counter electrode portion 16A due to oxidation and the like. Since the width W5 of the sealing area 56 is greater than 1 mm, the infiltration of moisture and the like from the outside can be limited to protect the coloring area 70. Since the width W5 of the sealing area 56 is greater than 1 mm, the durability of the sealing area 56 when the lens 30 is manufactured by cutting can be improved. Since the width W5 of the sealing area 56 is greater than 1 mm, when the electrochromic sheet 150 is thermoformed to manufacture a curved sheet, sufficient adhesion to other layers can also be ensured.

[0890] Since the width W5 of the sealing area 56 is 3 mm or less, the non-colored area in the lens 30 can be narrowed. Therefore, the electrochromic sheet 150 is suitable in terms of aesthetics. In the electrochromic sheet 150, since the sealing area 56 as the non-colored area is narrow, the design freedom is high and it is also suitable in terms of design and the like.

[0891] like Fig.35 As shown, in a plan view, the distance W6 between the first counter electrode portion 15A and the outer peripheral edge 30a of the lens 30 is preferably 0.25 mm or more. If the distance W6 is 0.25 mm or more, the infiltration of moisture from the outside can be limited to suppress the degradation of the first auxiliary electrode 15 due to oxidation or the like. The distance W6 may be, for example, 1 mm or less.

[0892] like Fig.36 As shown, in a plan view, the distance W7 between the second counter electrode portion 16A and the outer peripheral edge 30a of the lens 30 is preferably 0.25 mm or more. If the distance W7 is 0.25 mm or more, the infiltration of moisture from the outside can be limited to suppress the degradation of the second auxiliary electrode 16 due to oxidation or the like. The distance W7 may be, for example, 1 mm or less.

[0893] In the electrochromic sheet 150 of this embodiment, since the width W5 of the sealing area 56 is greater than or equal to 1 mm and less than or equal to 3 mm, the first auxiliary electrode 15 and the second auxiliary electrode 16 can be prevented from being degraded due to oxidation or the like, and the electrochromic sheet 150 is excellent in appearance. Therefore, the electrochromic sheet 150 having good electrochromic characteristics and excellent appearance can be realized.

[0894] The electrochromic sheet 150 includes: a first electrochromic layer 63, which changes color by oxidation reaction; a second electrochromic layer 64, which changes color by reduction reaction; and an electrolyte layer 65. The electrochromic sheet 150 includes two electrochromic layers, so that the driving voltage of the electrochromic element 60 can be suppressed. Therefore, the repeated durability of the electrochromic element 60 can be improved.

[0895] If the distances W2 and W4 between the first counter electrode portion 15A and the second counter electrode portion 16A and the outer peripheral edge 70a of the colored region 70 are 0.25 mm or more, the first counter electrode portion 15A and the second counter electrode portion 16A are located sufficiently away from the colored region 70. Therefore, the influence from the colored region 70 can be suppressed, and degradation of the first counter electrode portion 15A and the second counter electrode portion 16A can be suppressed.

[0896] When the distances W6 and W7 between the first counter electrode portion 15A and the second counter electrode portion 16A and the outer periphery 30 a of the lens 30 are 0.25 mm or more, the intrusion of moisture or the like from the outside can be limited to suppress the degradation of the first auxiliary electrode 15 and the second counter electrode portion 16A.

[0897] The lens 30 and the sunglasses 100 exert the same effect as the electrochromic film 150 .

[0898] Although the electrochromic sheet, the eyeglass lens, and the eyeglasses according to the embodiments have been described, the present invention is not limited thereto.

[0899] For example, Fig.33 The electrochromic sheet 150 shown 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 more (any number greater than two).

[0900] The electrochromic layer can change color as long as it undergoes at least one of an oxidation reaction and a reduction reaction. For example, the electrochromic layer can utilize only the color change based on the oxidation reaction, or can utilize only the color change based on the reduction reaction. The electrochromic layer can also be a structure that utilizes both oxidation reaction and reduction reaction to change color. The electrochromic sheet can be provided with an electrochromic layer that changes color through at least one of an oxidation reaction and a reduction reaction.

[0901] Fig.35 and Fig.36 The width W5 of the sealing area 56 shown represents the width of the sealing area 56 within the length range of the first extension portion 1 and the third extension portion 3, but the width W5 of the sealing area 56 only needs to be greater than 1 mm and less than 3 mm within the range where at least the first counter electrode portion 15A and the second counter electrode portion 16A are located.

[0902] constitute Fig.33 The layers of the electrochromic element 60 constituting the electrochromic sheet 150 shown may be replaced with other structures that perform the same function. The electrochromic sheet 150 may further include other layers (intermediate layers) between the substrates 11 and 12 and the electrochromic element 60 .

[0903] (Seventh Implementation Method)

[0904] In order to carry out color development and color elimination without delay in an electrochromic element, an auxiliary electrode is required.

[0905] In an electrochromic sheet, the color development and color elimination of the electrochromic element may vary (uneven).

[0906] An object of one aspect of the present invention is to provide an electrochromic sheet, an eyeglass lens, and eyeglasses that can develop and fade color without delay and can suppress variations in color development and fade.

[0907] (Solution 1)

[0908] An electrochromic sheet, comprising:

[0909] 1st substrate;

[0910] a second substrate, arranged opposite to the first substrate;

[0911] An electrochromic element is disposed between the first substrate and the second substrate and forms a coloring area whose color changes by application of voltage;

[0912] An insulating sealing portion dividing the colored area;

[0913] a first auxiliary electrode electrically connected to the electrochromic element; and

[0914] a second auxiliary electrode electrically connected to the electrochromic element,

[0915] The electrochromic element has:

[0916] a first transparent electrode electrically connected to the first auxiliary electrode;

[0917] a second transparent electrode electrically connected to the second auxiliary electrode; and

[0918] One or more electrochromic layers change color through at least one of an oxidation reaction and a reduction reaction.

[0919] The first auxiliary electrode has a lower resistance than the first transparent electrode and has a first counter electrode portion extending along a portion of an outer periphery of the colored region.

[0920] The second auxiliary electrode has a lower resistance than the second transparent electrode and has a second counter electrode portion extending along another portion of the outer periphery of the colored region.

[0921] The second counter electrode portion is located on the opposite side of the colored region from the first counter electrode portion and faces the first counter electrode portion.

[0922] The first counter electrode portion includes: a first extending portion extending toward one side along the outer periphery of the colored region; and a second extending portion extending toward the other side along the outer periphery of the colored region.

[0923] The second counter electrode portion includes: a third extension portion extending toward one side along the outer periphery of the colored region; and a fourth extension portion extending toward the other side along the outer periphery of the colored region.

[0924] The first extension portion and the third extension portion extend in a direction approaching each other, and a distance between the front ends thereof is greater than 0 mm and less than 20 mm in a plan view.

[0925] The second extending portion and the fourth extending portion extend in directions approaching each other, and a distance between their front ends in a plan view is greater than 0 mm and less than or equal to 20 mm.

[0926] (Solution 2)

[0927] The electrochromic sheet according to Scheme 1, wherein:

[0928] 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.

[0929] The electrochromic element further comprises an electrolyte layer filled between the first electrochromic layer and the second electrochromic layer.

[0930] The first electrochromic layer contains a material that changes color through an oxidation reaction, and the second electrochromic layer contains a material that changes color through a reduction reaction.

[0931] (Solution 3)

[0932] The electrochromic sheet according to Scheme 1, wherein:

[0933] The distance between the first counter electrode portion and the second counter electrode portion and the outer periphery of the colored region in a plan view is 0.25 mm or more.

[0934] (Solution 4)

[0935] A spectacles lens comprising the electrochromic sheet according to any one of claims 1 to 3.

[0936] (Scheme 5)

[0937] A pair of spectacles comprising the spectacles lens according to claim 4.

[0938] According to one aspect of the present invention, it is possible to provide an electrochromic sheet, an eyeglass lens, and eyeglasses that can develop and fade color without delay and can suppress variations in color development and fade.

[0939] like Fig.37 As shown, the fourth extension portion 4 is formed from the middle position (the position where the second extraction portion 16B is formed) (the second base) in the length direction of the second counter electrode portion 16A as a starting point along the outer peripheral edge 70a of the colored region 70 to the other side ( Fig.37 The fourth extension portion 4 is close to the first counter electrode portion 15A (more specifically, the second extension portion 2) and extends in the -Y direction ( Fig.37 The fourth extension portion 4 is curved so that the inclination angle (the inclination angle with respect to the X direction) gradually decreases toward the front end.

[0940] In a plan view, the width of the portion (front end portion) of the fourth extension portion 4 including at least the front end (one end) can be, for example, 0.1 mm or more and 1.0 mm or less. Since the width of the front end portion is 0.1 mm or more, the resistance can be reduced. Therefore, the coloring and color removal in the colored area 70 can be performed without delay. Since the width of the front end portion is 1.0 mm or less, it is difficult to be visually recognized from the outside. Therefore, the fourth extension portion 4 is not easily conspicuous. Therefore, the aesthetics of the sunglasses 100 can be improved. The width of the front end portion can also be 0.3 mm or more and 1.0 mm or less.

[0941] In the present embodiment, the front end portion of the fourth extension portion 4 is a length portion having a constant width.

[0942] The front end portion of the fourth extension portion 4 is not limited to a shape having a constant width, and may also be a shape whose width gradually narrows toward the front end. In this case, the width of the front end portion may be an average width of a prescribed length range (e.g., a length range of 5 mm from the front end). The width of the front end portion may also be the width of the front end.

[0943] The fourth extension portion 4 may be longer than the third extension portion 3 or may be the same length as the third extension portion 3. The dimension of the fourth extension portion 4 in the Y direction may be larger than the dimension of the third extension portion 3 in the Y direction.

[0944] Since the second counter electrode portion 16A includes the third extension portion 3 and the fourth extension portion 4, a voltage can be uniformly applied over a wide range of the coloring region 70. Therefore, sufficient color development (coloring) and color elimination can be achieved over a wide range of the coloring region 70.

[0945] The first extension portion 1 and the third extension portion 3 are arranged opposite to each other in the X direction. The first extension portion 1 and the third extension portion 3 extend in directions approaching each other. The front ends of the first extension portion 1 and the third extension portion 3 face each other. L1 is the front end 1a of the first extension portion 1 in a plan view (refer to Fig.35 ) and the front end 3a of the third extension portion 3 (reference Fig.36 That is, the interval L1 is the interval between the front ends of the first extension portion 1 and the third extension portion 3 in a plan view.

[0946] The interval L1 is greater than 0 mm and less than 20 mm. Since the interval L1 is greater than 0 mm, the first extension portion 1 and the third extension portion 3 are located at separate positions. If the auxiliary electrodes are too close to each other, there may be a deviation in the current, but since the first extension portion 1 and the third extension portion 3 are separated, the current deviation (unevenness) between them can be suppressed. Therefore, sufficient coloring (coloring) and color elimination can be achieved in a wide range of the coloring area 70.

[0947] Since the interval L1 is less than 20 mm, the separation distance between the first extension portion 1 and the third extension portion 3 is appropriate. If the auxiliary electrodes are too far apart from each other, the current becomes insufficient, and a delay in color development and color elimination is likely to occur. It is also easy to produce uneven color development and color disappearance residue. In the electrochromic sheet 150, since the separation distance between the first extension portion 1 and the third extension portion 3 is appropriate, color development (coloring) and color elimination in the coloring area 70 can be performed without delay.

[0948] The interval L1 is preferably 5 mm or more and 20 mm or less, and more preferably 10 mm or more and 20 mm or less.

[0949] The second extension portion 2 and the fourth extension portion 4 are arranged opposite to each other in the X direction. The second extension portion 2 and the fourth extension portion 4 extend in directions approaching each other. The front ends of the second extension portion 2 and the fourth extension portion 4 are opposite to each other. L2 is the interval between the front ends of the second extension portion 2 and the fourth extension portion 4 in a plan view. That is, the interval L2 is the interval between the front ends of the second extension portion 2 and the fourth extension portion 4 in a plan view.

[0950] The interval L2 is greater than 0 mm and less than 20 mm. Since the interval L2 is greater than 0 mm, the second extension portion 2 and the fourth extension portion 4 are located at separate positions. If the auxiliary electrodes are too close to each other, there may be a deviation in the current, but since the second extension portion 2 and the fourth extension portion 4 are separated, the current deviation (unevenness) between them can be suppressed. Therefore, sufficient coloring (coloring) and color elimination can be achieved in a wide range of the coloring area 70.

[0951] Since the interval L2 is less than 20 mm, the separation distance between the second extension portion 2 and the fourth extension portion 4 is appropriate. If the auxiliary electrodes are too far apart from each other, the current becomes insufficient, and the color development and color elimination are prone to delay, but since the separation distance between the second extension portion 2 and the fourth extension portion 4 is appropriate, the color development (coloring) and color elimination in the coloring area 70 can be performed without delay.

[0952] The interval L2 is preferably 5 mm or more and 20 mm or less. The interval L2 is more preferably 10 mm or more and 20 mm or less.

[0953] The relationship between the interval L1 and the interval L2 is not particularly limited. The interval L2 may be smaller than the interval L1. The interval L2 may be larger than the interval L1. The interval L2 may be the same as the interval L1.

[0954] If the second extension portion 2 is longer than the first extension portion 1, the front end of the second extension portion 2 is located at a position farther from the first extraction portion 15B than the front end of the first extension portion 1. If the fourth extension portion 4 is longer than the third extension portion 3, the front end of the fourth extension portion 4 is located at a position farther from the second extraction portion 16B than the front end of the third extension portion 3. At this time, the current between the second extension portion 2 and the fourth extension portion 4 tends to become smaller than the current between the first extension portion 1 and the third extension portion 3, but if the interval L2 is smaller than the interval L1, sufficient current can flow between the second extension portion 2 and the fourth extension portion 4. Therefore, the deviation of the current between the first counter electrode portion 15A and the second counter electrode portion 16A can be reduced.

[0955] Description of Reference Numerals

[0956] 11: First substrate.

[0957] 12: Second substrate.

[0958] 30: Electrochromic element (EC element).

[0959] 31: The first transparent electrode.

[0960] 32: The second transparent electrode.

[0961] 33: First auxiliary electrode.

[0962] 34: Second auxiliary electrode.

[0963] 35: Electrochromic layer (EC layer).

[0964] 40: Sealing part.

[0965] 110: Lens.

[0966] 111: Electrochromic part (EC part).

[0967] 115: Lens body.

[0968] 119: Lens components.

[0969] 120: Mirror frame.

[0970] 122: Middle beam section.

[0971] 123: Temple.

[0972] 150: Electrochromic film (EC film).

[0973] 160: Laminated body.

[0974] 331: Frame 1.

[0975] 332: The first removal section.

[0976] 341: Frame 2.

[0977] 342: The second extraction section.

[0978] 351: 1st electrochromic layer (1st EC layer).

[0979] 352: Second electrochromic layer (second EC layer).

[0980] 353: Electrolyte layer.

[0981] AR: Colored Area.

Claims

1. An electrochromic sheet, wherein: It has: 1st substrate; 2nd substrate; an electrochromic element, sandwiched by the first substrate and the second substrate; and a sealing portion which is sandwiched between the first substrate and the second substrate and which defines a coloring area between the first substrate and the second substrate; The electrochromic element has: A first transparent electrode is disposed on the first substrate side; a first auxiliary electrode disposed around the colored region and electrically connected to the first transparent electrode; A second transparent electrode is disposed on the second substrate side; a second auxiliary electrode disposed around the colored region and electrically connected to the second transparent electrode; and The electrochromic layer is sandwiched between the first transparent electrode and the second transparent electrode, is disposed in the coloring region, and is colored by application of a voltage. The first auxiliary electrode has a first lead-out portion protruding toward the outside of the colored region. The second auxiliary electrode has a second lead-out portion protruding toward the outside of the colored region. In a plan view, the first extraction portion does not overlap with the second transparent electrode, and the second extraction portion does not overlap with the first transparent electrode. In a cross section connecting the first lead-out portion and the colored region, a distance from an end of the second transparent electrode on the first lead-out portion side to the colored region is greater than or equal to 0.01 mm and less than or equal to 1.0 mm.

2. The electrochromic sheet according to claim 1, wherein: In a cross section connecting the second extraction portion and the colored region, a distance from an end of the first transparent electrode on the second extraction portion side to the colored region is greater than or equal to 0.01 mm and less than or equal to 1.0 mm.

3. The electrochromic sheet according to claim 1 or 2, wherein: The electrochromic layer has: A first electrochromic layer, stacked on the first transparent electrode; a second electrochromic layer stacked on the second transparent electrode; and an electrolyte layer filled between the first electrochromic layer and the second electrochromic layer, The first electrochromic layer includes a material that exhibits coloration through an oxidation reaction. The second electrochromic layer includes a material that exhibits coloration through a reduction reaction.

4. A laminate, wherein: It has: The electrochromic sheet according to claim 1; and The lens component is laminated with the electrochromic sheet.

5. A lens for spectacles, wherein: It has: An electrochromic portion obtained by cutting the electrochromic sheet according to claim 1 along the peripheries of the first auxiliary electrode and the second auxiliary electrode; and The lens body is laminated with the electrochromic part. The lens body has a protruding portion having the same shape as the first extraction portion and the second extraction portion in a plan view.

6. A pair of glasses, wherein: It has: The spectacles lens according to claim 5; and Spectacle frames, holding the spectacles with lenses, The first take-out portion and the second take-out portion are electrically connected to the mirror frame.

Images