Display unit and cover member

Abstract

The present invention relates to a display unit comprising: a display panel; a substrate (a) provided on the display panel via an adhesive layer (a); an anti-glare layer provided on the substrate (a); and an anti-reflection film provided on the anti-glare layer, wherein the visible light average transmittance A (%) of the anti-reflection film is 85% or less, the visible light average transmittance B1 (%) of any one or more of the adhesive layer (a), the substrate (a), and the anti-glare layer is 85% or less, and (A／100) × (B1 / 100) is 0.3 to 0.65 inclusive.

Description

Display unit and cover member

[0001] The present invention relates to a display unit and a cover member.

[0002] From the viewpoint of aesthetics, a technique of installing a transparent cover member such as a cover glass on the front surface of an image display device such as a liquid crystal display (LCD) is used. However, one of the problems with such a cover member is that it reflects external light, resulting in glare. To prevent the glare of external light, a cover member provided with an anti-reflection film is known. For example, Patent Document 1 discloses a transparent substrate with an anti-reflection film that has light-absorbing ability and insulating properties.

[0003] Furthermore, in recent years, automobiles have come to require a uniform look in their interiors. A similar uniform look is increasingly required for in-vehicle displays. Specifically, a small color difference between the automobile display unit, such as a liquid crystal panel, and the black frame print, i.e., seamlessness, is important. To minimize the color difference between the liquid crystal panel and the black frame print, a method using a semi-transparent (smoked) adhesive or resin cover containing a light-absorbing agent such as a pigment is known. For example, Patent Document 2 discloses a liquid crystal display device having a liquid crystal panel and a cover member disposed on the liquid crystal panel via an adhesive layer, in which a pigment or the like is contained in the adhesive layer to achieve a predetermined range of internal luminous transmittance, thereby achieving high bright-light contrast.

[0004] Japanese Unexamined Patent Publication No. 2018-115105 Japanese Unexamined Patent Publication No. 11-337705

[0005] As mentioned above, although a certain level of high contrast in bright areas can be achieved by using semi-transparent adhesives or resin covers in display devices, optical scattering due to pigments, etc. can also occur at the same time, so there is room for further improvement in the bright area contrast of displays.

[0006] Therefore, an object of the present invention is to provide a display unit and a cover member that are excellent in seamlessness, bright contrast, and transmitted color.

[0007] The present invention is as follows.

[0008] a display unit having a display panel, a substrate a provided on the display panel via a pressure-sensitive adhesive layer a, an anti-glare layer provided on the substrate a, and an anti-reflection film provided on the anti-glare layer, wherein the anti-reflection film has an average visible light transmittance A (%) of 85% or less, and at least one of the pressure-sensitive adhesive layer a, the substrate a, and the anti-glare layer has an average visible light transmittance B1 (%) of 85% or less, and (A / 100) x (B1 / 100) is 0.3 or more and 0.65 or less.

[0009] a display unit comprising: a display panel; a substrate a provided on the display panel with a pressure-sensitive adhesive layer a interposed therebetween; a substrate b provided on the substrate a with a pressure-sensitive adhesive layer b interposed therebetween; an anti-glare layer provided on the substrate b; and an anti-reflection film provided on the anti-glare layer, wherein the anti-reflection film has an average visible light transmittance A (%) of 85% or less; one or more of the pressure-sensitive adhesive layer a, the substrate a, the pressure-sensitive adhesive layer b, and the anti-glare layer have an average visible light transmittance B2 (%) of 85% or less; and (A / 100) x (B2 / 100) is 0.3 or more and 0.65 or less.

[0010] A cover member having: a pressure-sensitive adhesive layer a; a substrate a provided on the pressure-sensitive adhesive layer a; an anti-glare layer provided on the substrate a; and an anti-reflection film provided on the anti-glare layer, wherein the anti-reflection film has an average visible light transmittance A (%) of 85% or less; one or more of the substrate a, the pressure-sensitive adhesive layer a, and the anti-glare layer has an average visible light transmittance B1 (%) of 85% or less; and (A / 100)×(B1 / 100) is 0.3 or more and 0.65 or less.

[0011] a cover member having: a pressure-sensitive adhesive layer (a); a substrate (a) provided on the pressure-sensitive adhesive layer (a); a substrate (b) provided on the substrate (a) with a pressure-sensitive adhesive layer (b) interposed therebetween; an anti-glare layer provided on the substrate (b); and an anti-reflection film provided on the anti-glare layer, wherein the anti-reflection film has an average visible light transmittance A (%) of 85% or less; one or more of the pressure-sensitive adhesive layer (a), the substrate (a), the pressure-sensitive adhesive layer (b), and the anti-glare layer has an average visible light transmittance B2 (%) of 85% or less; and (A / 100) x (B2 / 100) is 0.3 or more and 0.65 or less.

[0012] A cover member having a base (a), an anti-glare layer provided on the base (a), and an anti-reflection film provided on the anti-glare layer, wherein the anti-reflection film has an average visible light transmittance A (%) of 85% or less, at least one of the base (a) and the anti-glare layer has an average visible light transmittance B11 (%) of 85% or less, and (A / 100) × (B11 / 100) is 0.3 or more and 0.65 or less.

[0013] A cover member having: a base (a); a base (b) provided on the base (a) with a pressure-sensitive adhesive layer (b) interposed therebetween; an anti-glare layer provided on the base (b); and an anti-reflection film provided on the anti-glare layer, wherein the anti-reflection film has an average visible light transmittance A (%) of 85% or less; at least one of the base (a) and the pressure-sensitive adhesive layer (b) has an average visible light transmittance B21 (%) of 85% or less; and (A / 100) x (B21 / 100) is 0.3 or more and 0.65 or less.

[0014] According to the present invention, a display unit and a cover member are provided that are excellent in seamlessness, bright contrast, and transmitted color.

[0015] Fig. 1 is a cross-sectional view schematically showing an example of the configuration of a display unit according to a first embodiment of the present invention. Fig. 2 is a cross-sectional view schematically showing an example of the configuration of a display unit according to a second embodiment of the present invention. Fig. 3 is a cross-sectional view schematically showing an example of the configuration of a third embodiment of the present invention. Fig. 4 is a cross-sectional view schematically showing an example of the configuration of a fourth embodiment of the present invention. Fig. 5 is a cross-sectional view schematically showing an example of the configuration of a fifth embodiment of the present invention. Fig. 6 is a cross-sectional view schematically showing an example of the configuration of a sixth embodiment of the present invention.

[0016] Hereinafter, embodiments of the present invention will be described in detail, but the present invention is not limited to the following embodiments and can be modified as desired without departing from the spirit of the present invention. Furthermore, the use of "to" to indicate a range of values ​​means that the values ​​before and after the range are included as the lower and upper limits. Furthermore, the embodiments shown in the drawings are schematic in order to clearly explain the present invention, and do not necessarily accurately represent the actual size or scale.

[0017] A display unit according to a first embodiment of the present invention comprises a display panel, a substrate a provided on the display panel via an adhesive layer a, an anti-glare layer provided on the substrate a, and an anti-reflection film provided on the anti-glare layer, wherein the anti-reflection film has an average visible light transmittance A (%) of 85% or less, one or more of the adhesive layer a, the substrate a, and the anti-glare layer has an average visible light transmittance B1 (%) of 85% or less, and (A / 100) × (B1 / 100) is 0.3 or more and 0.65 or less.

[0018] The display unit of the first embodiment of the present invention is excellent in seamlessness, bright area contrast, and transmitted color. This is presumably due to the following mechanism of action. That is, the display unit of the first embodiment of the present invention has a low visible light average transmittance B1 (%) of 85% or less for any one or more of the adhesive layer a, base a, and antiglare layer, resulting in a semi-transparent (smoked) state and a small color difference between the display panel and the black frame print, resulting in excellent seamlessness. Furthermore, because any one or more of the adhesive layer a, base a, and antiglare layer are semi-transparent (smoked), optical scattering may occur, resulting in poor bright area contrast. However, in this embodiment, the visible light average transmittance A (%) of the antireflection film is also low, at 85% or less, and the optical scattering is absorbed by the antireflection film, resulting in excellent bright area contrast. It should be noted that the present invention is not limited to the above mechanism of action.

[0019] A display unit according to a second embodiment of the present invention includes a display panel, a substrate a provided on the display panel with an adhesive layer a interposed therebetween, a substrate b provided on the substrate a with an adhesive layer b interposed therebetween, an anti-glare layer provided on the substrate b, and an anti-reflection film provided on the anti-glare layer, wherein the anti-reflection film has an average visible light transmittance A (%) of 85% or less, one or more of the adhesive layer a, the substrate a, the adhesive layer b, and the anti-glare layer have an average visible light transmittance B2 (%) of 85% or less, and (A / 100) × (B2 / 100) is 0.3 or more and 0.65 or less.

[0020] The display unit of the second embodiment of the present invention is excellent in seamlessness, bright area contrast, and transmitted color. This is presumably due to the following mechanism of action. That is, the display unit of the second embodiment of the present invention has a low visible light average transmittance B2 (%) of 85% or less for any one or more of the adhesive layer a, base a, adhesive layer b, and antiglare layer, resulting in a semi-transparent (smoke) state and a small color difference between the display panel and the black frame print, resulting in excellent seamlessness. Furthermore, because any one or more of the adhesive layer a, base a, adhesive layer b, and antiglare layer are semi-transparent (smoke), optical scattering may occur, resulting in poor bright area contrast. However, in this embodiment, the visible light average transmittance A (%) of the antireflection film is also low, at 85% or less, and the optical scattering is absorbed by the antireflection film, resulting in excellent bright area contrast. Note that the present invention should not be construed as being limited to the above mechanism of action.

[0021] A cover member according to a third embodiment of the present invention is a cover member comprising an adhesive layer a, a substrate a provided on the adhesive layer a, an anti-glare layer provided on the substrate a, and an anti-reflection film provided on the anti-glare layer, wherein the anti-reflection film has an average visible light transmittance A (%) of 85% or less, one or more of the substrate a, the adhesive layer a, and the anti-glare layer have an average visible light transmittance B1 (%) of 85% or less, and (A / 100) × (B1 / 100) is 0.3 or more and 0.65 or less.

[0022] The cover member of the third embodiment of the present invention has a configuration in which the display panel is removed from the display unit of the first embodiment of the present invention. By attaching the cover member of the third embodiment of the present invention to the display panel via the adhesive layer a, a display unit excellent in seamlessness, bright contrast, and transmitted color, i.e., the display unit of the first embodiment of the present invention, can be obtained.

[0023] A cover member according to a fourth embodiment of the present invention is a cover member comprising an adhesive layer a, a substrate a provided on the adhesive layer a, a substrate b provided on the substrate a with an adhesive layer b interposed therebetween, an anti-glare layer provided on the substrate b, and an anti-reflection film provided on the anti-glare layer, wherein the anti-reflection film has an average visible light transmittance A (%) of 85% or less, one or more of the adhesive layer a, the substrate a, the adhesive layer b, and the anti-glare layer have an average visible light transmittance B2 (%) of 85% or less, and (A / 100) × (B2 / 100) is 0.3 or more and 0.65 or less.

[0024] The cover member of the fourth embodiment of the present invention has a configuration in which the display panel is removed from the display unit of the second embodiment of the present invention. By attaching the cover member of the fourth embodiment of the present invention to the display panel via the adhesive layer a, a display unit excellent in seamlessness, bright contrast, and transmitted color, i.e., the display unit of the second embodiment of the present invention, can be obtained.

[0025] A cover member according to a fifth embodiment of the present invention is a cover member having a base a, an anti-glare layer provided on the base a, and an anti-reflection film provided on the anti-glare layer, characterized in that the anti-reflection film has an average visible light transmittance A (%) of 85% or less, one or more of the base a and the anti-glare layer has an average visible light transmittance B11 (%) of 85% or less, and (A / 100) × (B11 / 100) is 0.3 or more and 0.65 or less.

[0026] The cover member of the fifth embodiment of the present invention has a configuration in which the adhesive layer a and the display panel are removed from the display unit of the first embodiment of the present invention. By attaching the cover member of the fifth embodiment of the present invention to the display panel via an optional adhesive layer, a display unit excellent in seamlessness, bright contrast, and transmitted color can be obtained.

[0027] A cover member according to a sixth embodiment of the present invention is a cover member having a base a, a base b provided on the base a via a pressure-sensitive adhesive layer b, an anti-glare layer provided on the base b, and an anti-reflection film provided on the anti-glare layer, wherein the anti-reflection film has an average visible light transmittance A (%) of 85% or less, and at least one of the base a and the pressure-sensitive adhesive layer b has an average visible light transmittance B21 (%) of 85% or less, and (A / 100) × (B21 / 100) is 0.3 or more and 0.65 or less.

[0028] The cover member of the sixth embodiment of the present invention has a configuration in which the adhesive layer a and the display panel are removed from the display unit of the second embodiment of the present invention. By attaching the cover member of the sixth embodiment of the present invention to the display panel via an optional adhesive layer, a display unit excellent in seamlessness, bright contrast, and transmitted color can be obtained.

[0029] <Display Unit> <Display Unit of First Embodiment> First, the configuration of a display unit of a first embodiment of the present invention will be described. As shown in Fig. 1, the display unit of the first embodiment of the present invention is a display unit (10) having a display panel (11), a substrate a (13a) provided on the display panel (11) via a pressure-sensitive adhesive layer a (12a), an anti-glare layer (14) provided on the substrate a (13a), and an anti-reflection film (15) provided on the anti-glare layer (14), wherein the average visible light transmittance A (%) of the anti-reflection film (15) is 85% or less, the average visible light transmittance B1 (%) of any one or more of the pressure-sensitive adhesive layer a (12a), the substrate a (13a), and the anti-glare layer (14) is 85% or less, and (A / 100) x (B1 / 100) is 0.3 or more and 0.65 or less.

[0030] [Display Panel] The display unit of this embodiment includes a display panel. The display panel is not particularly limited, and examples thereof include a self-luminous display such as an OLED or a micro LED, and a transmissive liquid crystal display.

[0031] [Adhesive Layer a] The adhesive layer a is provided between the display panel and the substrate a described below in order to bond the display panel and the substrate a described below.

[0032] The pressure-sensitive adhesive layer a can be formed using a conventionally known pressure-sensitive adhesive composition commonly used in display units, and examples thereof include optically clear adhesives (OCA) and optically clear resins (OCR) such as UV-curable resins. Examples of OCAs and OCRs include acrylic polymers, silicone polymers, polyesters, polyurethanes, polyamides, polyvinyl ethers, vinyl acetate / vinyl chloride copolymers, modified polyolefins, epoxy-based polymers, fluorine-based polymers, and rubber-based polymers such as natural rubber and synthetic rubber. In particular, acrylic polymers are preferably used because they exhibit adhesive properties such as moderate wettability, cohesiveness, and adhesiveness, and are also excellent in transparency, weather resistance, heat resistance, and solvent resistance, and have a wide range of adhesive strength.

[0033] As described below, the following method can be used to adjust the average visible light transmittance of the pressure-sensitive adhesive layer a to 85% or less. A light absorber is incorporated into the pressure-sensitive adhesive layer a. The light absorber may include pigments such as carbon black, titanium black, titanium oxide, and zinc oxide, as well as dyes such as pigments. The average visible light transmittance (%) can be controlled to 85% or less by the absorption of visible light by the light absorber contained in the pressure-sensitive adhesive layer a. The control of the average visible light transmittance of the pressure-sensitive adhesive layer a is determined by appropriately selecting the type and content of the exemplified light absorber. For example, carbon black and the like are effective in reducing the average visible light transmittance even in relatively small amounts. Therefore, when such a light absorber is used, the content of the light absorber can be reduced without deteriorating the adhesive strength of the pressure-sensitive adhesive layer a, and therefore it is preferably used. Specifically, for example, when the pressure-sensitive adhesive layer a contains the pigment, the content is preferably 0.01 to 20% by mass, and more preferably 0.02 to 10% by mass. Furthermore, for example, when the adhesive layer a contains the dye, the content is preferably 0.01 to 20% by mass, and more preferably 0.05 to 5% by mass.

[0034] When the average visible light transmittance (%) of the adhesive layer a is 85% or less, it is in a semi-transparent (smoke) state as described above, so the color difference between the display panel and the black frame printed portion can be reduced, and seamlessness is excellent.

[0035] The average visible light transmittance (%) of the pressure-sensitive adhesive layer a is preferably 85% or less, more preferably 80% or less, even more preferably 75% or less, and particularly preferably 70% or less. From the viewpoint of suppressing optical scattering originating from the pigment in the pressure-sensitive adhesive layer, the average visible light transmittance (%) of the pressure-sensitive adhesive layer a is preferably 25% or more, more preferably 30% or more, and even more preferably 35% or more.

[0036] The thickness of the adhesive layer a is not particularly limited, but is preferably 50 to 400 μm, more preferably 75 to 350 μm, and even more preferably 100 to 300 μm. Having a thickness of 50 μm or more makes it possible to prevent the generation of air bubbles when bonding the display to a rigid cover glass. Furthermore, having a thickness of 400 μm or less makes it possible to shorten the drying time during adhesive production, thereby reducing production costs.

[0037] [Substrate a] The substrate a has a function of protecting the display panel, and is provided on the display panel via an adhesive layer a. As the substrate a, any conventionally known substrate a such as glass or a resin film can be used.

[0038] The refractive index of the substrate a is preferably 1.4 or more and 1.7 or less. If the refractive index of the substrate a is within the above range, reflection at the bonding surface can be sufficiently suppressed when a display panel is optically bonded. The refractive index of the substrate a is more preferably 1.45 or more, even more preferably 1.47 or more, and more preferably 1.65 or less, even more preferably 1.6 or less.

[0039] The substrate a preferably contains at least one of glass and resin.

[0040] When the substrate a includes glass, the type of glass is not particularly limited, and glasses having various compositions can be used. Among these, the glass preferably includes quartz or sodium, and preferably has a composition that can be strengthened by molding or chemical strengthening treatment. Specific examples include quartz glass, aluminosilicate glass, soda-lime glass, borosilicate glass, alkali-free glass, lead glass, alkali-barium glass, and aluminoborosilicate glass. In this specification, when the substrate a includes glass, the substrate is also referred to as a glass substrate.

[0041] The thickness of the glass substrate is not particularly limited, but is usually preferably 5 mm or less, more preferably 3 mm or less, and even more preferably 1.5 mm or less, and is usually 0.2 mm or more.

[0042] The glass substrate is preferably chemically strengthened glass, which increases the strength of the display unit. In the first embodiment, when an antiglare layer or the like described below is provided on the glass substrate, the chemical strengthening is performed after the antiglare layer or the like is provided and before the antireflection film described below is formed.

[0043] When the base a contains a resin, the type of resin is not particularly limited, and resins having various compositions can be used. Among these, the resin is preferably a thermoplastic resin or a thermosetting resin, such as polyvinyl chloride resin, polyethylene resin, polypropylene resin, polystyrene resin, polyvinyl acetate resin, polyester resin, polyurethane resin, cellulose-based resin, acrylic resin, AS (acrylonitrile-styrene) resin, ABS (acrylonitrile-butadiene-styrene) resin, fluorine-based resin, thermoplastic elastomer, polyamide resin, polyimide resin, polyacetal resin, polycarbonate resin, modified polyphenylene ether resin, polyethylene terephthalate resin, polybutylene terephthalate resin, polylactic acid-based resin, cyclic polyolefin resin, polyphenylene sulfide resin, etc. Among these, cellulose-based resins are preferred, such as triacetyl cellulose resin, polycarbonate resin, polyethylene terephthalate resin, etc. These resins may be used alone, or two or more may be used in combination. It is particularly preferable that the resin contains at least one resin selected from polyethylene terephthalate, polycarbonate, acrylic, silicone, and triacetyl cellulose. In this specification, when the base a contains a resin, the base is also referred to as a resin base.

[0044] The shape of the resin substrate is not particularly limited, and examples include film and plate shapes, with film shapes being preferred from the standpoint of shatter prevention. When the resin substrate is in the form of a film, i.e., a resin film, its thickness is not particularly limited, but is preferably 20 to 250 μm, and more preferably 30 to 188 μm. When the resin substrate is in the form of a plate, i.e., a resin plate, its thickness is not particularly limited, but is typically preferably 5 mm or less, more preferably 3 mm or less, and even more preferably 1.5 mm or less. Furthermore, it is typically 0.2 mm or more.

[0045] When the substrate a includes both glass and resin, for example, the substrate may have the resin substrate on the glass substrate.

[0046] As will be described later, when the average visible light transmittance (%) of the substrate a is 85% or less, the glass substrate as the substrate a contains MnO, NiO, MoO as a coloring material. ３ , Fe ２ O ３ , Fe ２ O ５ ,CuO,Cu ２ O, SnO ２ , Cr ２ O ５ , Cr ２ O ３ , CeO ２ The resin substrate as the substrate a may contain a light absorbing agent in the substrate a. The light absorbing agent may be a pigment such as carbon black, titanium black, titanium oxide, zinc oxide, or a dye such as a coloring matter. Visible light is absorbed by the light absorbing agent contained in the pressure-sensitive adhesive layer a, and the average visible light transmittance (%) can be controlled to 85% or less.

[0047] When the glass substrate as the substrate a contains the colorant, the content is adjusted appropriately to match the transmittance within a range of about 0.001 to 5 mass %, and when the resin substrate as the substrate a contains the light absorber, the content is adjusted appropriately to match the transmittance within a range of about 0.01 to 20 mass %.

[0048] When the average visible light transmittance (%) of the substrate a is 85% or less, it is in a semi-transparent (smoked) state as described above, so that the color difference between the display panel and the black frame printed portion can be reduced, resulting in excellent seamlessness.

[0049] The average visible light transmittance (%) of the substrate a is preferably 85% or less, more preferably 80% or less, even more preferably 75% or less, and particularly preferably 70% or less. From the viewpoint of suppressing optical scattering due to the added whitening agent, the average visible light transmittance (%) of the substrate a is preferably 20% or more, more preferably 25% or more, and even more preferably 30% or more.

[0050] The base body a may have a printed portion on its periphery. By providing the printed portion, the base body a can be decorated. The printed portion can be formed by printing a print pattern such as frame printing or logo printing in an appropriately selected color depending on the purpose or use. By providing such a printed portion, it is possible to shield wiring and the like arranged on the display panel, and also to provide symbols and characters related to the display panel. Any known printing method can be applied, but for example, screen printing is preferred.

[0051] When a printed portion is provided on the substrate a, the CIE 1976 L ＊ a ＊ b ＊ The color represented by the color system and the area including the display part (non-printed part) of the display unit are CIE 1976 L ＊ a ＊ b ＊ The difference ΔE from the color expressed in the color system preferably satisfies the following formula (1), more preferably satisfies the following formula (2), and even more preferably satisfies the following formula (3): 0≦ΔE≦8 (1) 0≦ΔE≦6 (2) 0≦ΔE≦4 (3) This reduces the color difference between the area including the printed portion of the display unit and the area including the display portion (non-printed portion), resulting in excellent seamlessness and improved color tone of the entire display unit. Here, ΔE is expressed as a function of the CIE 1976 L ＊ a ＊ b ＊ L of the area including the printed part of the liquid crystal display device in the color system ＊ , a ＊ , b ＊ and L of the area including the display area (non-printed area) of the liquid crystal display device. ＊ , a ＊ , b ＊ The square root of the difference between (ΔE = √{(ΔL ＊ ) ２ + (Δa ＊ ) ２ + (Δb ＊ ) ２}).

[0052] [Anti-glare Layer] In the display unit of the first embodiment of the present invention, an anti-glare layer is provided on the above-mentioned substrate a. The anti-glare layer refers to a layer having a function of diffusing specularly reflected light and reducing glare and reflection, and examples thereof include an anti-glare layer in which a function of diffusing specularly reflected light (anti-glare property) is imparted to a hard coat layer.

[0053] The antiglare layer has an uneven surface on one side for external or internal scattering, thereby increasing the haze value and imparting antiglare properties. The antiglare layer is preferably made of an antiglare layer composition obtained by dispersing at least a particulate substance that itself has antiglare properties in a solution in which a polymer resin is dissolved as a binder. The antiglare layer can be formed by applying the antiglare layer composition to one main surface of the substrate a.

[0054] Examples of the particulate substance having antiglare properties include inorganic fine particles such as silica, clay, talc, calcium carbonate, calcium sulfate, barium sulfate, aluminum silicate, titanium oxide, synthetic zeolite, alumina, and smectite, as well as organic fine particles including styrene resin, urethane resin, benzoguanamine resin, silicone resin, and acrylic resin.

[0055] Furthermore, the polymer resin used as the binder for the hard coat layer or the anti-glare layer may be, for example, a polymer resin containing a polyester resin, an acrylic resin, an acrylic urethane resin, a polyester acrylate resin, a polyurethane acrylate resin, an epoxy acrylate resin, a urethane resin, or the like.

[0056] In the display unit of the first embodiment of the present invention, from the viewpoint of suitably preventing reflections, the haze value of the antiglare layer is preferably 0.5% or more, more preferably 2% or more, more preferably 3% or more, and even more preferably 10% or more. From the viewpoint of improving the clarity of images on the display, the haze value is preferably, for example, 60% or less. The haze value can be adjusted, for example, by the surface shape of the antiglare layer. The haze value is measured using a haze meter (HZ-V3 manufactured by Suga Test Instruments Co., Ltd.) or the like in accordance with JIS K 7136:2000.

[0057] The thickness of the antiglare layer is not particularly limited, but is preferably 1 to 20 μm, more preferably 2 to 18 μm, and even more preferably 3 to 10 μm. Generally, beads made of a resin such as acrylic or styrene are dispersed in the antiglare layer to form irregularities on the surface. The particle size of these acrylic or styrene beads is typically about 100 nm to 5000 nm, and the thickness of the antiglare layer serving as the medium must be equal to or greater than the particle size of the beads. On the other hand, if the thickness of the antiglare layer is 10 μm or less, sufficient productivity is achieved in terms of the drying time of the medium.

[0058] [Average visible light transmittance B1] In the display unit of the first embodiment of the present invention, the average visible light transmittance B1 (%) of any one or more of the above-mentioned pressure-sensitive adhesive layer a, the base a, and the anti-glare layer is 85% or less. When the average visible light transmittance B1 (%) of any one or more of the above-mentioned pressure-sensitive adhesive layer a, the base a, and the anti-glare layer is 85% or less, the display panel is in a semi-transparent (smoke) state as described above, thereby reducing the color difference between the display panel and the black frame printed portion and providing excellent seamlessness. In this specification, the average visible light transmittance can be measured using a spectrophotometer (for example, Shimadzu Corporation, product name: SolidSpec-3700).

[0059] [Anti-Reflection Film] The anti-reflection film has a laminated structure in which at least two dielectric layers with different refractive indices are stacked, and functions to suppress light reflection. The anti-reflection film is provided on the anti-glare layer described above. The anti-reflection film is preferably a film in which high-refractive index layers and low-refractive index layers are alternately stacked. Such a film makes it easy to manufacture an anti-reflection film that satisfies the condition for the average visible light transmittance A described below. Here, the high-refractive index layer refers to a dielectric layer with a relatively high refractive index of 1.9 or more for light at a wavelength of 550 nm. The low-refractive index layer refers to a dielectric layer with a relatively low refractive index of 1.6 or less for light at a wavelength of 550 nm. The refractive index of the high-refractive index layer for light at a wavelength of 550 nm is preferably 1.9 to 2.5, more preferably 2 to 2.4. The refractive index of the low-refractive index layer is, for example, 1.1 to 1.6, preferably 1.15 to 1.55, and more preferably 1.2 to 1.5.

[0060] The number of high refractive index layers and low refractive index layers in the antireflection film may be one of each, or two or more of each. When the antireflection film includes one high refractive index layer and one low refractive index layer, the high refractive index layer and the low refractive index layer are preferably stacked in this order from the cover member side. When the antireflection film includes two or more high refractive index layers and two or more low refractive index layers, the high refractive index layer and the low refractive index layer are preferably stacked alternately in this order from the antiglare layer side. Furthermore, the outermost layer is preferably a low refractive index layer. In order to obtain low reflectivity, it is relatively easy to manufacture the antireflection film if the outermost layer is a low refractive index layer.

[0061] In order to improve the antireflection performance, the antireflection film is preferably a laminate having a plurality of layers stacked thereon, and the laminate preferably has a total of 2 to 8 layers, more preferably 2 to 6 layers, and even more preferably 2 to 4 layers. As described above, the laminate here is preferably one in which high-refractive index layers and low-refractive index layers are alternately stacked. Furthermore, additional layers may be added within a range that does not impair the optical properties.

[0062] The high refractive index layer in the antireflection coating is preferably a mixed oxide of Mo and Nb or a mixed oxide of Mo, W and Nb. As will be described later, the low refractive index layer may be, for example, an oxygen-deficient silicon oxide layer. Conventionally, oxygen-deficient silicon oxide layers have a yellowish color in visible light, but when the high refractive index layer is a mixed oxide of Mo and Nb or a mixed oxide of Mo, W and Nb, the silicon oxide layer can be prevented from becoming yellowish.

[0063] The extinction coefficient of the high refractive index layer in the antireflection film is preferably 0.005 to 3, more preferably 0.04 to 0.38. If the extinction coefficient is 0.005 or more, the desired absorptance can be achieved with an appropriate number of layers. Furthermore, if the extinction coefficient is 3 or less, it is relatively easy to achieve both reflection color and transmittance.

[0064] The high refractive index layer in the anti-reflection film is preferably amorphous, since it can be prepared at a relatively low temperature and is suitable for use in a substrate containing a resin, for example, since the resin is not damaged by heat.

[0065] The low refractive index layer in the anti-reflection film is mainly made of silicon oxide (SiO ｘ ) is preferably composed of the low refractive index layer. Here, "mainly" means the component that is contained in the largest amount (by mass) in the low refractive index layer, and for example, means that the low refractive index layer contains 70 mass % or more of the component in question. ｘ ) is preferable because it has a low refractive index and is effective in reducing reflectance. ｘ is fully oxidized silicon oxide (SiO ２ ), but from the viewpoint of improving optical reliability and scratch resistance, oxygen-deficient silicon oxide is preferred. Furthermore, the silicon oxide layer may contain at least one oxide selected from Nb, Ti, Zr, Ta, Al, Sn, W, Mo, and In for the purpose of improving reliability, and each oxide may be oxygen-deficient. Furthermore, when a low refractive index layer is formed on an antiglare layer having a relatively high haze, i.e., a relatively large surface unevenness, high oxidation stability is required during film formation.

[0066] The average visible light transmittance A of the antireflective film is 85% or less. As described above, since one or more of the pressure-sensitive adhesive layer a, the substrate a, and the antiglare layer are in a semi-transparent (smoked) state, optical scattering occurs, which can deteriorate the contrast in bright areas. However, in this embodiment, the average visible light transmittance A (%) of the antireflective film is also low at 85% or less, so the optical scattering is absorbed by the antireflective film, resulting in excellent contrast in bright areas. The average visible light transmittance A of the antireflective film is preferably 90% or less, more preferably 85% or less, even more preferably 80% or less, and particularly preferably 75% or less. Furthermore, from the viewpoint of keeping the a* and b* of the transmitted colors within ±2 or less, the average visible light transmittance A of the antireflective film is preferably 30% or more, more preferably 40% or more, and even more preferably 50% or more.

[0067] The antireflection coating has a laminated structure of at least two dielectric layers with different refractive indices, at least one of which is primarily composed of an oxide of Si, and at least one of which is primarily composed of a mixed oxide of at least one oxide selected from Group A (Mo and W) and at least one oxide selected from Group B (Si, Nb, Ti, Zr, Ta, Al, Sn, and In), preferably with a content of Group B elements contained in the mixed oxide of 65% by mass or less relative to the total of the elements in Group A and the elements in Group B. This allows the antireflection coating to have an average visible light transmittance A of 85% or less. Preferably, at least one of the dielectric layers is a high-refractive-index layer.

[0068] The at least one oxide selected from Group A is preferably Mo, or Mo and W, and the at least one oxide selected from Group B is preferably Nb. That is, at least one of the dielectric layers is preferably a mixed oxide of Mo and Nb or a mixed oxide of Mo, W and Nb, and more preferably a mixed oxide of Mo, W and Nb.

[0069] The antireflection film can be formed on the antiglare layer using a known film-forming method such as sputtering, vacuum deposition, or coating. That is, the dielectric layers that constitute the antireflection film are formed on the antiglare layer using a known film-forming method such as sputtering, vacuum deposition, or coating, depending on the lamination order. The antireflection film can also be provided by laminating a transparent resin film having an antireflection function onto the antiglare layer.

[0070] Examples of sputtering methods include magnetron sputtering, pulse sputtering, AC sputtering, and digital sputtering.

[0071] For example, magnetron sputtering is a method in which a magnet is placed on the back surface of a base dielectric material to generate a magnetic field, and gas ion atoms collide with the surface of the dielectric material and are ejected, thereby forming a sputter film with a thickness of several nanometers. This method can form a continuous dielectric film that is an oxide or nitride of the dielectric material.

[0072] For example, digital sputtering, unlike conventional magnetron sputtering, first forms an ultrathin metal film by sputtering, then oxidizes it by irradiating it with oxygen plasma, oxygen ions, or oxygen radicals. This process is repeated in the same chamber to form a thin film of metal oxide. In this case, the film-forming molecules are metal when deposited on the substrate, so they are presumably more ductile than metal oxide films. Therefore, even with the same energy, the film-forming molecules are more likely to rearrange, resulting in a denser, smoother film.

[0073] The total thickness of the anti-reflection film is preferably 100 to 500 nm. By setting the thickness of the anti-reflection film to 100 nm or more, it is possible to effectively suppress reflection of external light, which is preferable.

[0074] [Anti-fouling film] The display unit of the first embodiment of the present invention may further have an anti-fouling film (also referred to as an "anti-finger print (AFP) film") on the anti-reflection film in order to protect the outermost surface of the anti-reflection film. The anti-fouling film may be composed of, for example, a fluorine-containing organosilicon compound. The fluorine-containing organosilicon compound may be used without particular limitation as long as it can impart anti-fouling properties, water repellency, and oil repellency, and examples thereof include fluorine-containing organosilicon compounds having one or more groups selected from the group consisting of a polyfluoropolyether group, a polyfluoroalkylene group, and a polyfluoroalkyl group. The polyfluoropolyether group is a divalent group having a structure in which polyfluoroalkylene groups and etheric oxygen atoms are alternately bonded.

[0075] In addition, commercially available fluorine-containing organosilicon compounds having one or more groups selected from the group consisting of polyfluoropolyether groups, polyfluoroalkylene groups, and polyfluoroalkyl groups include KP-801 (trade name, manufactured by Shin-Etsu Chemical Co., Ltd.), KY178 (trade name, manufactured by Shin-Etsu Chemical Co., Ltd.), KY-130 (trade name, manufactured by Shin-Etsu Chemical Co., Ltd.), KY-185 (trade name, manufactured by Shin-Etsu Chemical Co., Ltd.), OPTOOL (registered trademark) DSX, and OPTOOL AES (all trade names, manufactured by Daikin Industries, Ltd.). The film thickness of the antifouling film is, for example, preferably 2 to 9 nm, and more preferably 3 to 7 nm.

[0076] [Formula 1] In the display unit of the first embodiment of the present invention, the average visible light transmittance A (%) of the antireflection film is 85% or less, and the average visible light transmittance B1 (%) of any one or more of the pressure-sensitive adhesive layer a, the substrate a, and the antiglare layer is 85% or less, and the average visible light transmittance A (%) and the average visible light transmittance B1 (%) satisfy the following formula 1: 0.3≦(A / 100)×(B1 / 100)≦0.65...formula 1

[0077] In the above formula 1, B1 refers to the average visible light transmittance of the pressure-sensitive adhesive layer a, the substrate a, and the anti-glare layer that is 85% or less. That is, B1 includes the average visible light transmittance of the pressure-sensitive adhesive layer a that is 85% or less, the average visible light transmittance of the substrate a that is 85% or less, and the average visible light transmittance of the anti-glare layer that is 85% or less. When there are multiple average visible light transmittances B1 that are 85% or less, (B1 / 100) is expressed as the product of these. For example, when the average visible light transmittance of the pressure-sensitive adhesive layer a is 70%, the average visible light transmittance of the substrate a is 70%, and the average visible light transmittance of the anti-glare layer is 100%, (B1 / 100) is calculated as (70 / 100) × (70 / 100).

[0078] By ensuring that (A / 100) x (B1 / 100) is 0.3 or more, a decrease in display brightness can be suppressed. (A / 100) x (B1 / 100) is preferably 0.4 or more, and more preferably 0.5 or more. Furthermore, by ensuring that (A / 100) x (B1 / 100) is 0.65 or less, the bright contrast of the display can be improved. (A / 100) x (B1 / 100) is preferably 0.6 or less, and more preferably 0.55 or less.

[0079] [Luminous transmittance: Y] In the display unit of the first embodiment of the present invention, the laminate on the display (i.e., a laminate comprising the pressure-sensitive adhesive layer a, the substrate a, the antiglare layer, and the antireflection film; this laminate corresponds to the cover member described below) preferably has a luminous transmittance (Y) of 65 to 20%. If the luminous transmittance (Y) is within the above range, the laminate has an appropriate light absorption ability, thereby suppressing light reflection. This improves the bright contrast of the display unit. The luminous transmittance (Y) is more preferably 60 to 25%, and even more preferably 55 to 30%. The luminous transmittance (Y) can be measured by the method specified in JIS Z 8701 (1999), as described in the Examples below.

[0080] In the display unit of the first embodiment of the present invention, to achieve a luminous transmittance (Y) of 65 to 30%, it is preferable to use, for example, a mixed oxide of at least one oxide selected from Group A consisting of Mo and W and at least one oxide selected from Group B consisting of Si, Nb, Ti, Zr, Ta, Al, Sn, and In as the high refractive index layer of the antireflection film, and adjust the oxidation amount of the film. However, when it is desired to maintain high brightness of the display, an antireflection film that does not have light absorption ability or has relatively high transmittance and has a luminous transmittance of 90% or more as the display unit may be preferably used. In this case, for example, at least one oxide selected from Nb, Ti, Zr, Ta, Al, Sn, Mo, W, and In can be used as the high refractive index layer.

[0081] The luminous transmittance (Y) of the display unit of the first embodiment of the present invention can be adjusted, for example, by controlling the irradiation time of the oxidizing source, the irradiation output, the distance from the substrate, and the amount of oxidizing gas when forming the first dielectric layer, which is a high refractive index layer, in the above-mentioned anti-reflection film.

[0082] [Transmitted color under D65 light source: b ＊ The display unit of the first embodiment of the present invention has a b value in transmitted color under a D65 light source. ＊ The value of b is preferably 5 or less. ＊ When the value is in the above range, the transmitted light is not yellowish, which is preferable. ＊ The value is more preferably 5 or less, and even more preferably 3 or less. ＊ The lower limit of the value is preferably −5 or more, more preferably −3 or more. ＊ In the above range, the transmitted light is colorless and the transmitted light is not obstructed, which is preferable. ＊ The value can be measured by the method specified in JIS Z 8729 (2004).

[0083] [Sheet Resistance] In the display unit according to the first embodiment of the present invention, the sheet resistance of the anti-reflection film is 10 ４ When the sheet resistance of the anti-reflection film is in the above range, the anti-reflection film is insulating, so even if a touch panel is attached, the capacitance change due to finger contact required for a capacitive touch sensor is maintained, allowing the touch panel to function. ６ Ω / □ or more is more preferable, and 10 ８ It is more preferable that the sheet resistance is Ω / □ or more. The sheet resistance can be measured by the method specified in JIS K 6911 (2006).

[0084] In the display unit of the first embodiment of the present invention, the sheet resistance of the anti-reflection film is set to 10 ４ To achieve a resistance of Ω / □ or more, for example, the metal content in the anti-reflection film, the irradiation time of the oxidation source, the irradiation output, and the amount of oxidation gas can be adjusted.

[0085] <Display Unit of Second Embodiment> Next, the configuration of a display unit of a second embodiment of the present invention will be described. As shown in FIG. 2, a display unit according to a second embodiment of the present invention is a display unit (20) having a display panel (21), a substrate a (23a) provided on the display panel (21) via an adhesive layer a (22a), a substrate b (23b) provided on the substrate a (23a) via an adhesive layer b (22b), an antiglare layer (24) provided on the substrate b (23b), and an antireflection film (25) provided on the antiglare layer (24), wherein the average visible light transmittance A (%) of the antireflection film (25) is 85% or less, the average visible light transmittance B2 (%) of any one or more of the adhesive layer a (22a), the substrate a (23a), the adhesive layer b (22b), and the antiglare layer (24) is 85% or less, and (A / 100) × (B2 / 100) is 0.3 or more and 0.65 or less.

[0086] [Display panel, adhesive layer a, base a] In the display unit of the second embodiment of the present invention, the display panel, adhesive layer a, and base a can be those described in the section <Display unit of the first embodiment of the present invention>.

[0087] [Adhesive Layer b] In the display unit of the second embodiment of the present invention, the adhesive layer b is provided between the substrate a and the substrate b described below in order to bond the substrate a and the substrate b together.

[0088] Like the adhesive a, the adhesive layer b can be formed using a conventionally known adhesive composition commonly used in display units, and examples thereof include optically clear adhesives (OCA) and optically clear resins (OCR) such as UV-curable resins. Examples of OCAs and OCRs include acrylic polymers, silicone polymers, polyesters, polyurethanes, polyamides, polyvinyl ethers, vinyl acetate / vinyl chloride copolymers, modified polyolefins, epoxy-based polymers, fluorine-based polymers, and rubber-based polymers such as natural rubber and synthetic rubber. In particular, acrylic polymers are preferably used because they exhibit adhesive properties such as moderate wettability, cohesiveness, and adhesiveness, and are also excellent in transparency, weather resistance, heat resistance, and solvent resistance, and have a wide range of adhesive strength.

[0089] As described below, one method for adjusting the average visible light transmittance of the pressure-sensitive adhesive layer b to 85% or less is to include the inclusion of a light absorber in the pressure-sensitive adhesive layer b. The light absorber may include pigments such as carbon black, titanium black, titanium oxide, and zinc oxide, as well as dyes such as pigments. The average visible light transmittance (%) of the pressure-sensitive adhesive layer b can be controlled to 85% or less by, for example, absorbing visible light in the light absorber contained in the pressure-sensitive adhesive layer b. The type and content of the light absorber exemplified above can be appropriately selected and determined to control the average visible light transmittance of the pressure-sensitive adhesive layer b. For example, carbon black and the like are effective in reducing the average visible light transmittance even in relatively small amounts. Therefore, when such a light absorber is used, the content of the light absorber can be reduced without deteriorating the adhesive strength of the pressure-sensitive adhesive layer b, and therefore, it is preferably used. Specifically, for example, when the pressure-sensitive adhesive layer b contains the pigment, the content is preferably 0.1 to 20% by mass, and more preferably 0.2 to 10% by mass. Furthermore, for example, when the adhesive layer b contains the dye, the content is preferably 0.1 to 20% by mass, and more preferably 0.2 to 5% by mass.

[0090] When the average visible light transmittance (%) of the adhesive layer b is 85% or less, it is in a semi-transparent (smoke) state as described above, so the color difference between the display panel and the black frame printed portion can be reduced, resulting in excellent seamlessness.

[0091] The average visible light transmittance (%) of the pressure-sensitive adhesive layer b is preferably 85% or less, more preferably 80% or less, even more preferably 75% or less, and particularly preferably 70% or less. From the viewpoint of suppressing optical scattering of the colorant, the average visible light transmittance (%) of the pressure-sensitive adhesive layer b is preferably 20% or more, more preferably 25% or more, and even more preferably 30% or more.

[0092] The thickness of the pressure-sensitive adhesive layer b is not particularly limited, but is preferably 1 to 50 μm, more preferably 5 to 40 μm, and even more preferably 10 to 30 μm. When the thickness of the pressure-sensitive adhesive layer b is 1 μm or more, the substrate a and the substrate b can be bonded together while preventing the generation of bubbles. Furthermore, when the thickness of the pressure-sensitive adhesive layer b is 30 μm or less, the drying time during production of the pressure-sensitive adhesive layer is shortened, resulting in excellent mass productivity.

[0093] [Substrate b] In the display unit of the second embodiment of the present invention, the substrate b has the effect of preventing the base a from scattering. Furthermore, when the base a has a curved surface, it is difficult to form a uniform anti-reflection film on the surface in the first embodiment. However, by forming a uniform anti-reflection film on the film-like substrate b and then laminating it to the substrate a, it is possible to impart uniform anti-reflection performance. The substrate b can be one described in the section <Display unit of the first embodiment of the present invention>. The substrate b is preferably in the form of a film.

[0094] [Antiglare Layer] In the display unit of the second embodiment of the present invention, the antiglare layer described in the section <Display Unit of the First Embodiment of the Present Invention> can be used.

[0095] [Average visible light transmittance B2] In the display unit of the second embodiment of the present invention, the average visible light transmittance B2 (%) of any one or more of the above-mentioned adhesive layer a, base a, adhesive layer b, and anti-glare layer is 85% or less. When the average visible light transmittance B2 (%) of any one or more of the above-mentioned adhesive layer a, base a, adhesive layer b, and anti-glare layer is 85% or less, the display unit is in a semi-transparent (smoke) state as described above, which reduces the color difference between the display panel and the black frame printed portion and provides excellent seamlessness.

[0096] [Anti-Reflection Film] In the display unit of the second embodiment of the present invention, the anti-reflection film described in the section <Display Unit of the First Embodiment of the Present Invention> can be used.

[0097] [Anti-fouling Film] When an anti-fouling film is provided in the display unit of the second embodiment of the present invention, the film described in the section <Display unit of the first embodiment of the present invention> can be used.

[0098] [Formula 2] In the display unit of the second embodiment of the present invention, the average visible light transmittance A (%) of the antireflection film is 85% or less, the average visible light transmittance B2 (%) of any one or more of the pressure-sensitive adhesive layer a, the base a, the pressure-sensitive adhesive layer b, and the antiglare layer is 85% or less, and the average visible light transmittance A (%) and the average visible light transmittance B2 (%) satisfy the following formula 2: 0.3≦(A / 100)×(B2 / 100)≦0.65...formula 2

[0099] In the above formula 2, B2 refers to the average visible light transmittance of the pressure-sensitive adhesive layer a, the substrate a, the pressure-sensitive adhesive layer b, and the anti-glare layer that is 85% or less. That is, B2 includes the average visible light transmittance of the pressure-sensitive adhesive layer a that is 85% or less, the average visible light transmittance of the substrate a that is 85% or less, the average visible light transmittance of the pressure-sensitive adhesive layer b that is 85% or less, and the average visible light transmittance of the anti-glare layer that is 85% or less. When there are multiple average visible light transmittances B1 that are 85% or less, (B2 / 100) is expressed as the product of these. For example, when the average visible light transmittance of the pressure-sensitive adhesive layer a is 70%, the average visible light transmittance of the substrate a is 100%, the average visible light transmittance of the pressure-sensitive adhesive layer b is 70%, and the average visible light transmittance of the anti-glare layer is 100%, (B2 / 100) is calculated as (70 / 100) × (70 / 100).

[0100] By ensuring that (A / 100) x (B2 / 100) is 0.3 or more, a decrease in display brightness can be suppressed. (A / 100) x (B2 / 100) is preferably 0.4 or more, and more preferably 0.5 or more. Furthermore, by ensuring that (A / 100) x (B2 / 100) is 0.65 or less, the bright contrast of the display can be improved. (A / 100) x (B2 / 100) is preferably 0.6 or less, and more preferably 0.55 or less.

[0101] [Luminous transmittance: Y, sheet resistance] In the display unit of the second embodiment of the present invention, the luminous transmittance: Y and sheet resistance are the same as those described in the section <Display unit of the first embodiment of the present invention>.

[0102] <Cover member> <Cover member of third embodiment> Next, the configuration of the cover member of the third embodiment of the present invention will be described. As shown in Figure 3, the cover member of the third embodiment of the present invention is a cover member (30) having a base a (33a) provided on a pressure-sensitive adhesive layer a (32a), an anti-glare layer (34) provided on the base a (33a), and an anti-reflection film (35) provided on the anti-glare layer (34), characterized in that the average visible light transmittance A (%) of the anti-reflection film (35) is 85% or less, the average visible light transmittance B1 (%) of any one or more of the base a (33a), the pressure-sensitive adhesive layer a (32a), and the anti-glare layer (34) is 85% or less, and (A / 100) x (B1 / 100) is 0.3 or more and 0.65 or less.

[0103] The respective configurations of the cover member of the third embodiment can be directly adopted from those described in the section <Display unit of the first embodiment of the present invention>.

[0104] <Cover Member of Fourth Embodiment> Next, the configuration of a cover member of a fourth embodiment of the present invention will be described. As shown in FIG. 4, the cover member of a fourth embodiment of the present invention is a cover member (40) having a substrate a (43a) provided on an adhesive layer a (42a), a substrate b (43b) provided on the substrate a (43a) via an adhesive layer b (42b), an antiglare layer (44) provided on the substrate b (43b), and an antireflection film (45) provided on the antiglare layer (44), wherein the average visible light transmittance A (%) of the antireflection film (45) is 85% or less, the average visible light transmittance B2 (%) of any one or more of the adhesive layer a (42a), the substrate a (43a), the adhesive layer b (42b), and the antiglare layer (44) is 85% or less, and (A / 100) × (B2 / 100) is 0.3 or more and 0.65 or less.

[0105] The respective configurations of the cover member of the fourth embodiment can be directly adopted from those described in the section <Display unit of the second embodiment of the present invention>.

[0106] <Cover member of fifth embodiment> Next, the configuration of the cover member of the fifth embodiment of the present invention will be described. As shown in Figure 5, the cover member of the fifth embodiment of the present invention is a cover member (50) having a base a (53a), an antiglare layer (54) provided on the base a (53a), and an antireflection film (55) provided on the antiglare layer (54), characterized in that the average visible light transmittance A (%) of the antireflection film (55) is 85% or less, the average visible light transmittance B11 (%) of at least one of the base a (53a) and the antiglare layer (54) is 85% or less, and (A / 100) x (B11 / 100) is 0.3 or more and 0.65 or less.

[0107] The respective configurations of the cover member of the fifth embodiment can be directly adopted from those described in the section <Display unit of the first embodiment of the present invention>.

[0108] <Cover member of the sixth embodiment> Next, the configuration of the cover member of the sixth embodiment of the present invention will be described. As shown in Figure 6, the cover member of the sixth embodiment of the present invention is a cover member having a base a (63a), a base b (63b) provided on the base a (63a) via a pressure-sensitive adhesive layer b (62b), an anti-glare layer (64) provided on the base b (63b), and an anti-reflection film (65) provided on the anti-glare layer (64), characterized in that the average visible light transmittance A (%) of the anti-reflection film (65) is 85% or less, the average visible light transmittance B21 (%) of at least one of the base a (63a) and the pressure-sensitive adhesive layer b (62b) is 85% or less, and (A / 100) x (B21 / 100) is 0.3 or more and 0.65 or less.

[0109] The respective configurations of the cover member of the sixth embodiment can be directly adopted from those described in the section <Display unit of the second embodiment of the present invention>.

[0110] <In-vehicle display unit, in-vehicle cover member> The display unit according to an embodiment of the present invention and the cover member according to an embodiment of the present invention are excellent in seamlessness, contrast in bright areas, and transmitted color, and are therefore useful as an in-vehicle display unit and an in-vehicle cover member. The in-vehicle display unit according to an embodiment of the present invention comprises the display unit according to an embodiment of the present invention. The in-vehicle cover member according to an embodiment of the present invention comprises the cover member according to an embodiment of the present invention.

[0111] As explained above, the present specification discloses the following: [1] A display unit having a display panel, a substrate a provided on the display panel via a pressure-sensitive adhesive layer a, an anti-glare layer provided on the substrate a, and an anti-reflection film provided on the anti-glare layer, wherein the anti-reflection film has an average visible light transmittance A (%) of 85% or less, one or more of the pressure-sensitive adhesive layer a, the substrate a, and the anti-glare layer has an average visible light transmittance B1 (%) of 85% or less, and (A / 100) × (B1 / 100) is 0.3 or more and 0.65 or less. [2] A display unit having: a display panel; a substrate a provided on the display panel with a pressure-sensitive adhesive layer a interposed therebetween; a substrate b provided on the substrate a with a pressure-sensitive adhesive layer b interposed therebetween; an anti-glare layer provided on the substrate b; and an anti-reflection film provided on the anti-glare layer, wherein the anti-reflection film has an average visible light transmittance A (%) of 85% or less; one or more of the pressure-sensitive adhesive layer a, the substrate a, the pressure-sensitive adhesive layer b, and the anti-glare layer have an average visible light transmittance B2 (%) of 85% or less; and (A / 100) x (B2 / 100) is 0.3 or more and 0.65 or less. [3] A cover member having an adhesive layer a, a substrate a provided on the adhesive layer a, an anti-glare layer provided on the substrate a, and an anti-reflection film provided on the anti-glare layer, wherein the anti-reflection film has an average visible light transmittance A (%) of 85% or less, and at least one of the substrate a, the adhesive layer a, and the anti-glare layer has an average visible light transmittance B1 (%) of 85% or less, and (A / 100) × (B1 / 100) is 0.3 or more and 0.65 or less.[4] A cover member having: a pressure-sensitive adhesive layer a; a base a provided on the pressure-sensitive adhesive layer a; a base b provided on the base a with a pressure-sensitive adhesive layer b interposed therebetween; an anti-glare layer provided on the base b; and an anti-reflection film provided on the anti-glare layer, wherein the anti-reflection film has an average visible light transmittance A (%) of 85% or less; one or more of the pressure-sensitive adhesive layer a, the base a, the pressure-sensitive adhesive layer b, and the anti-glare layer have an average visible light transmittance B2 (%) of 85% or less; and (A / 100) × (B2 / 100) is 0.3 or more and 0.65 or less. [5] A cover member having a base a, an antiglare layer provided on the base a, and an antireflection film provided on the antiglare layer, wherein the antireflection film has an average visible light transmittance A (%) of 85% or less, at least one of the base a and the antiglare layer has an average visible light transmittance B11 (%) of 85% or less, and (A / 100) × (B11 / 100) is 0.3 or more and 0.65 or less. [6] A cover member having a base a, a base b provided on the base a via a pressure-sensitive adhesive layer b, an anti-glare layer provided on the base b, and an anti-reflection film provided on the anti-glare layer, wherein the anti-reflection film has an average visible light transmittance A (%) of 85% or less, and at least one of the base a and the pressure-sensitive adhesive layer b has an average visible light transmittance B21 (%) of 85% or less, and (A / 100) × (B21 / 100) is 0.3 or more and 0.65 or less. [7] The display unit according to [1] or [2], or the cover member according to any one of [3] to [6], wherein the anti-reflection film has a laminated structure in which at least two dielectric layers having different refractive indices are laminated, at least one of the dielectric layers being mainly composed of an oxide of Si, and at least one other layer of the laminated structure being mainly composed of a mixed oxide of at least one oxide selected from Group A consisting of Mo and W and at least one oxide selected from Group B consisting of Si, Nb, Ti, Zr, Ta, Al, Sn, and In, and the content of the elements of Group B contained in the mixed oxide relative to the total of the elements of Group A contained in the mixed oxide and the elements of Group B contained in the mixed oxide is 65 mass% or less.[8] The display unit according to [1] or [2], or the cover member according to any one of [3] to [6], wherein the base a comprises at least one of glass and resin. [9] The display unit according to [2], or the cover member according to [4] or [6], wherein the base b comprises a resin.

[10] The display unit according to [1] or [2], or the cover member according to any one of [3] to [6], wherein the luminous transmittance (Y) is 20 to 65%.

[11] An in-vehicle display unit or in-vehicle cover member comprising the display unit or cover member according to any one of [1] to

[10] .

[0112] The present invention will be described in detail below with reference to examples, but the present invention is not limited to these. Examples 1 to 5 are examples, and Examples 6 to 15 are comparative examples. Note that Examples 1 to 15 correspond to the display unit of the second embodiment of the present invention, but it is clear that the same effects as those of the examples can be obtained with other embodiments of the present invention.

[0113] (Example 1) A display panel (liquid crystal panel, manufactured by Mitsubishi Electric Corporation), a glass plate (trade name: Dragon Trail (registered trademark), manufactured by AGC; average visible light transmittance > 90%) as the substrate a, a transparent adhesive (trade name: TD06A-25, manufactured by Tomoegawa Paper Co., Ltd.; average visible light transmittance > 90%) as the adhesive used for the adhesive layer a, a smoke adhesive (trade name: ES178GF, manufactured by Shin-Tack Chemical Co., Ltd.; average visible light transmittance 70%) as the adhesive used for the adhesive layer b, and a hard coat TAC film (trade name: CHC, manufactured by Toppan Tomoegawa Optical Films Co., Ltd.; haze value 30%, average visible light transmittance > 90%) in which a hard coat (HC) layer is provided on a transparent resin substrate as the substrate b provided with an antiglare layer were prepared.

[0114] First, an anti-reflection coating was formed on the side of the hard-coated TAC film where the hard coat layer was provided, using the following procedure. (Anti-reflection coating formation) An anti-reflection coating having a film structure was formed by alternately depositing NMWO layers (high refractive index layers) and SiO layers (low refractive index layers). The NMWO layer refers to a mixed oxide layer of Nb, Mo, and W. First, a 5 nm NMWO layer was formed, followed by a 40 nm SiO layer, followed by a 45 nm NMWO layer, followed by a 15 nm SiO layer, followed by a 45 nm NMWO layer, followed by an 85 nm SiO layer, thereby forming an anti-reflection coating with a film structure consisting of six layers. The deposition methods for the SiO layer and NMWO layer are as follows.

[0115] (Formation of NMWO Layer) A target made by mixing and sintering niobium, molybdenum, and tungsten in a mass ratio of 24.3:29.7:46 was used in a digital sputtering method. The pressure was kept at 0.2 Pa with argon gas, and the NMWO layer was formed at a frequency of 100 kHz and a power density of 10.0 W / cm. ２ The NMWO layer was formed by pulse sputtering under the condition of a reverse pulse width of 3 μsec to form a metal film with a small thickness, followed by oxidation with oxygen gas immediately thereafter by repeating this process at high speed to form an oxide film, thereby forming an NMWO layer with a predetermined thickness. The composition of the NMWO layer formed by this method was measured by X-ray photoelectron spectroscopy (XPS) depth profile composition analysis using argon ion sputtering, and the results were as follows: Nb was 31.5 at%, Mo was 38.1 at%, W was 30.5 at%, and the B group element content was 24.3 mass%.

[0116] (SiO Layer Formation) A silicon target was used in a digital sputtering method, and the pressure was maintained at 0.2 Pa with argon gas at a frequency of 100 kHz and a power density of 10.0 W / cm. ２ Pulse sputtering was performed under the condition of a reverse pulse width of 3 μsec to form a silicon film with a minute thickness, and immediately thereafter, oxidation was performed with oxygen gas by repeating this process at high speed to form a silicon oxide film, and a silicon oxide [silica (SiO ｘ) was formed. The oxygen flow rate during oxidation with oxygen gas was 500 sccm, and the input power of the oxidation source was 1000 W. Furthermore, KY-185 manufactured by Shin-Etsu Chemical Co., Ltd. was vacuum-deposited on the top layer to a thickness of 4 nm as an antifouling film.

[0117] Next, a 1 cm wide black print was applied to the edge of the glass plate serving as the substrate a. The black print was performed by screen printing HF-RX01, GV3 710 BLACK (manufactured by Seiko Advance Corporation) with a 350 mesh. Next, a smoked adhesive was applied using a hand roller to the main surface of the hard-coated TAC film opposite the main surface having the anti-reflection coating. Next, the side of the hard-coated TAC film with the smoked adhesive attached was attached to the side of the glass plate that did not have the black printing. Furthermore, a transparent adhesive was attached to the side of the glass plate that did not have the black printing. Finally, the glass plate with the transparent adhesive was attached to a display panel. The display unit of Example 1 was thus produced.

[0118] (Example 2) A display unit of Example 2 was produced in the same manner as Example 1, except that a smoke adhesive (product name EA274GF, manufactured by Shin-Tack Chemical Co., Ltd.; average visible light transmittance 50%) was used as the adhesive used for the adhesive layer b.

[0119] (Example 3) A display unit of Example 3 was produced in the same manner as in Example 1, except that a resin substrate (product name MRS58TBC T734F, manufactured by Mitsubishi Gas Chemical Company, Inc.; average visible light transmittance 70%) was used as the substrate a, and a transparent adhesive (TD06A-25, manufactured by Tomoegawa Paper Works, Ltd.; average visible light transmittance >90%) was used as the adhesive used in the adhesive layer b.

[0120] (Example 4) A display unit of Example 4 was produced in the same manner as in Example 1, except that a smoke adhesive (product name ES178GF, manufactured by Shin-Tack Chemical Co., Ltd.; average visible light transmittance 70%) was used as the adhesive used for adhesive layer a, and a transparent adhesive (TD06A-25, manufactured by Tomoegawa Paper Co., Ltd.; average visible light transmittance >90%) was used as the adhesive used for adhesive layer b.

[0121] (Example 5) A display unit of Example 5 was produced in the same manner as in Example 1, except that a smoke adhesive (product name EA274GF, manufactured by Shin-Tack Chemical Co., Ltd.; average visible light transmittance 50%) was used as the adhesive used for adhesive layer a, and a transparent adhesive (TD06A-25, manufactured by Tomoegawa Paper Co., Ltd.; average visible light transmittance >90%) was used as the adhesive used for adhesive layer b.

[0122] Example 6 A display unit of Example 6 was fabricated in the same manner as in Example 1, except that the anti-reflection film was fabricated by the following procedure. ２ The anti-reflection coating was formed by alternately depositing a TiO layer (high refractive index layer) and a SiO layer (low refractive index layer). ２ A 4 nm thick TiO layer was formed, followed by a 34 nm thick SiO layer, a 105 nm thick NMWO layer, and a 90 nm thick SiO layer, forming an anti-reflection coating having a four-layer structure. The SiO layer was formed in the same manner as in Example 1. ２ The method for forming the layers is as follows.

[0123] (TiO ２ Layer formation) Using a titanium target by digital sputtering, the pressure was maintained at 0.2 Pa with argon gas, and the frequency was 100 kHz and the power density was 10.0 W / cm. ２ Pulse sputtering was performed under the condition of a reverse pulse width of 3 μsec to form a metal film with a minute thickness, and immediately thereafter, oxidation was performed with oxygen gas by repeating this process at high speed to form an oxide film, thereby forming a titanium oxide [titania (TiO)] film with a predetermined thickness. ２ Here, when oxidizing with oxygen gas, the flow rate of oxygen was 1000 sccm, and the input power of the oxidation source was 1000 W.

[0124] (Example 7) A display unit of Example 7 was produced in the same manner as in Example 1, except that a transparent adhesive (TD06A-25, manufactured by Tomoegawa Paper Co., Ltd.; average visible light transmittance >90%) was used as the adhesive used in the adhesive layer b.

[0125] (Example 8) A display unit of Example 8 was fabricated in the same manner as in Example 7, except that an anti-reflection film was formed with the same film configuration as in Example 1, and the transmittance was adjusted to 50% by appropriately changing the oxygen flow rate during deposition of the NMWO layer.

[0126] (Example 9) The display unit of Example 13 was produced in the same manner as in Example 6, except that a smoke adhesive (product name EA274GF, manufactured by Shin-Tack Chemical Co., Ltd.; average visible light transmittance 50%) was used as the adhesive used in the adhesive layer b.

[0127] Example 10 A display unit of Example 10 was produced in the same manner as in Example 6, except that a resin substrate (product name MRS58TBC T734F, manufactured by Mitsubishi Gas Chemical Company, Inc.; average visible light transmittance 70%) was used as the substrate a, and a transparent adhesive (TD06A-25, manufactured by Tomoegawa Paper Works, Ltd.; average visible light transmittance >90%) was used as the adhesive used in the adhesive layer b.

[0128] Example 11 A display unit of Example 11 was produced in the same manner as in Example 6, except that a resin base (product name HMR53TC T504F, manufactured by Mitsubishi Gas Chemical Company, Inc.; average visible light transmittance 50%) was used as the base a, and a transparent adhesive (TD06A-25, manufactured by Tomoegawa Paper Works, Ltd.; average visible light transmittance >90%) was used as the adhesive used in the adhesive layer b.

[0129] (Example 12) A display unit of Example 12 was produced in the same manner as in Example 6, except that a smoke adhesive (product name ES178GF, manufactured by Shin-Tack Chemical Co., Ltd.; average visible light transmittance 70%) was used as the adhesive used in adhesive layer a, and a transparent adhesive (TD06A-25, manufactured by Tomoegawa Paper Co., Ltd.; average visible light transmittance >90%) was used as the adhesive used in adhesive layer b.

[0130] (Example 13) A display unit of Example 13 was produced in the same manner as in Example 6, except that a smoke adhesive (product name EA274GF, manufactured by Shin-Tack Chemical Co., Ltd.; average visible light transmittance 50%) was used as the adhesive used for adhesive layer a, and a transparent adhesive (TD06A-25, manufactured by Tomoegawa Paper Co., Ltd.; average visible light transmittance >90%) was used as the adhesive used for adhesive layer b.

[0131] (Example 14) The display unit of Example 14 was produced in the same manner as Example 1, except that the adhesive used for adhesive layer b was a smoke adhesive (product name ES178GF, manufactured by Shin-Tack Chemical Co., Ltd.; average visible light transmittance 70%) and a smoke adhesive (product name EA274GF, manufactured by Shin-Tack Chemical Co., Ltd.; average visible light transmittance 50%) bonded together to form an adhesive with a transmittance of 35%.

[0132] (Example 15) A display unit of Example 15 was produced in the same manner as in Example 6, except that a transparent adhesive (TD06A-25, manufactured by Tomoegawa Paper Co., Ltd.; average visible light transmittance >90%) was used as the adhesive used in the adhesive layer b.

[0133] (Average visible light transmittance) In the display unit of each example, the average visible light transmittance of each of the antireflection film, pressure-sensitive adhesive layer a, base a, pressure-sensitive adhesive layer b, and anti-glare layer was measured using a spectrophotometer (manufactured by Shimadzu Corporation, product name: SolidSpec-3700) for the laminated structure of the antireflection layer, pressure-sensitive adhesive layer a, base a, pressure-sensitive adhesive layer b, and anti-glare layer before being attached to the display unit. The results are shown in Table 2.

[0134] (Luminous transmittance: Y, transparent color: b ＊ The luminous transmittance (Y) of the display unit in each example was measured by the method specified in JIS Z 8701 (1999). Specifically, the spectral transmittance of the laminated structure of pressure-sensitive adhesive layer a, substrate a, pressure-sensitive adhesive layer b, substrate b, antiglare layer, and antireflection layer before being attached to the display unit was measured using a spectrophotometer (manufactured by Shimadzu Corporation, product name: SolidSpec-3700), and the luminous transmittance (stimulus value Y specified in JIS Z 8701 (1999)) was calculated. A D65 light source was used to calculate the stimulus value Y. In addition, the transmitted color (b ＊ The color index (b value) specified in JIS Z 8729 (2004) is calculated from the transmission spectrum obtained by measuring the above spectral transmittance. ＊ The light source used was a D65 light source. ＊ <2.0 ×: b ＊≦-2.0 or 2.0≦b ＊ The results are shown in Table 2.

[0135] (Seamlessness) Seamlessness was defined as the SCI luminous reflectance Y of the region including the display part of the display unit of each example. The SCI reflectance was evaluated using a Konica Minolta CM-26d colorimeter. Since the SCI reflectance of the printed part of the display unit is typically about 0.7%, seamlessness was evaluated according to the following criteria: ○: SCI Y is less than 0.7 ×: SCI Y is 0.7 or more The results are shown in Table 2.

[0136] (Bright Light Contrast) A spectroradiometer (product name: CS-1000, manufactured by Konica Minolta, Inc.) was placed in a dark room at a position 60 cm from the display surface of each example of the display unit, and an artificial sunlight light source was placed at a position 40 cm from the display unit of each example. The illuminance of the artificial sunlight light source was adjusted to 40,000 lux on the surface of each example of the display unit. The bright light contrast was measured by producing black and white colors on the screen and calculating the emission intensity ratio between them, and was evaluated according to the following criteria: ○: Emission intensity ratio is 13 or more ×: Emission intensity ratio is less than 13 The results are shown in Table 2.

[0137]

[0138]

[0139] In the above calculation of (A / 100) × (B2 / 100), A corresponds to the average visible light transmittance of the anti-reflection film, and B2 corresponds to the average visible light transmittance of the pressure-sensitive adhesive layer a, the base a, the pressure-sensitive adhesive layer b, and the anti-glare layer that is 85% or less. As shown in Table 2, the display units of Examples 1 to 5 had an average visible light transmittance A (%) of the anti-reflection film of 85% or less, an average visible light transmittance B2 (%) of one or more of the pressure-sensitive adhesive layer a, the base a, the pressure-sensitive adhesive layer b, and the anti-glare layer of 85% or less, and (A / 100) × (B2 / 100) was 0.3 or more and 0.65 or less, resulting in excellent results in seamlessness, bright area contrast, and transmitted color.

[0140] On the other hand, in the display unit of Example 6, the average visible light transmittance of the anti-reflection film was high, so the color difference between the display area (non-printed area) and the printed area was large, and seamlessness was insufficient. In the display unit of Example 7, the average visible light transmittance of the anti-reflection film was suppressed to 70%, but the average visible light transmittance of the pressure-sensitive adhesive layer a, base a, pressure-sensitive adhesive layer b, and anti-glare layer was all high, so seamlessness was insufficient. In the display unit of Example 8, the average visible light transmittance of the anti-reflection film was suppressed to a low level of 50%, but the average visible light transmittance of the pressure-sensitive adhesive layer a, base a, pressure-sensitive adhesive layer b, and anti-glare layer was all high, so the transmitted color was insufficient. In the display unit of Example 9, the average visible light transmittance of the pressure-sensitive adhesive layer b was suppressed to 50%, but the average visible light transmittance of the anti-reflection film was high, so the color difference between the display area (non-printed area) and the printed area was large, and seamlessness was insufficient. The transmitted color was also insufficient. In the display unit of Example 10, the average visible light transmittance of the substrate a was reduced to 70%, but the average visible light transmittance of the anti-reflective film was high, resulting in a large color difference between the display area (non-printed area) and the printed area, and the seamlessness was insufficient. In the display unit of Example 11, the average visible light transmittance of the substrate a was reduced to a low level of 50%, but the average visible light transmittance of the anti-reflective film was high, resulting in a large color difference between the display area (non-printed area) and the printed area, and the seamlessness was insufficient. The transmitted color was also insufficient. In the display unit of Example 12, the average visible light transmittance of the pressure-sensitive adhesive layer a was reduced to 70%, but the average visible light transmittance of the anti-reflective film was high, resulting in a large color difference between the display area (non-printed area) and the printed area, and the seamlessness was insufficient. The bright contrast was also insufficient. In the display unit of Example 13, the average visible light transmittance of the pressure-sensitive adhesive layer a was reduced to a low level of 50%, but the average visible light transmittance of the anti-reflective film was high, resulting in the seamlessness was insufficient. The bright contrast was also insufficient. In the display unit of Example 14, the average visible light transmittance of the anti-reflection film was suppressed to 70%, and the average visible light transmittance of the pressure-sensitive adhesive layer b was suppressed to 35%, but the (A / 100) × (B2 / 100) ratio was as low as 0.25, so the bright contrast was insufficient and the transmitted color was also insufficient.In the display unit of Example 15, the average visible light transmittances of the pressure-sensitive adhesive layer a, the base a, the pressure-sensitive adhesive layer b, and the antiglare layer, as well as the average visible light transmittance of the antireflection film, were high, and (A / 100) × (B2 / 100) was as high as 1. Therefore, the color difference between the display area (non-printed area) and the printed area was large, and seamlessness was insufficient.

[0141] Although the present invention has been described in detail and with reference to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the present invention. This application is based on a Japanese patent application (Patent Application No. 2024-087176) filed on May 29, 2024, the contents of which are incorporated herein by reference.

[0142] 10, 20 Display unit 30, 40, 50, 60 Cover member 11, 21 Display panel 12a, 22a, 32a, 42a Pressure-sensitive adhesive layer a 13a, 23a, 33a, 43a, 53a, 63a Base a 22b, 42b, 62b Pressure-sensitive adhesive layer b 23b, 43b, 63b Base b 14, 24, 34, 44, 54, 64 Anti-glare layer 15, 25, 35, 45, 55, 65 Anti-reflection film

Claims

1. A display unit having a display panel, a substrate a provided on the display panel via an adhesive layer a, an anti-glare layer provided on the substrate a, and an anti-reflection film provided on the anti-glare layer, wherein the average visible light transmittance A (%) of the anti-reflection film is 85% or less, the average visible light transmittance B1 (%) of any one or more of the adhesive layer a, the substrate a, and the anti-glare layer is 85% or less, and (A / 100) x (B1 / 100) is 0.3 or more and 0.65 or less.

2. A display unit having a display panel, a substrate a provided on the display panel via an adhesive layer a, a substrate b provided on the substrate a via an adhesive layer b, an anti-glare layer provided on the substrate b, and an anti-reflection film provided on the anti-glare layer, wherein the average visible light transmittance A (%) of the anti-reflection film is 85% or less, the average visible light transmittance B2 (%) of any one or more of the adhesive layer a, the substrate a, the adhesive layer b, and the anti-glare layer is 85% or less, and (A / 100) x (B2 / 100) is 0.3 or more and 0.65 or less.

3. A cover member having an adhesive layer a, a substrate a provided on the adhesive layer a, an anti-glare layer provided on the substrate a, and an anti-reflection film provided on the anti-glare layer, wherein the average visible light transmittance A (%) of the anti-reflection film is 85% or less, the average visible light transmittance B1 (%) of any one or more of the substrate a, the adhesive layer a, and the anti-glare layer is 85% or less, and (A / 100) x (B1 / 100) is 0.3 or more and 0.65 or less.

4. A cover member having an adhesive layer a, a substrate a provided on said adhesive layer a, a substrate b provided on said substrate a with an adhesive layer b interposed therebetween, an anti-glare layer provided on said substrate b, and an anti-reflection film provided on said anti-glare layer, wherein the average visible light transmittance A (%) of said anti-reflection film is 85% or less, the average visible light transmittance B2 (%) of any one or more of said adhesive layer a, said substrate a, said adhesive layer b, and said anti-glare layer is 85% or less, and (A / 100) x (B2 / 100) is 0.3 or more and 0.65 or less.

5. A cover member having a base (a), an anti-glare layer provided on the base (a), and an anti-reflection film provided on the anti-glare layer, wherein the average visible light transmittance A (%) of the anti-reflection film is 85% or less, the average visible light transmittance B11 (%) of at least one of the base (a) and the anti-glare layer is 85% or less, and (A / 100) x (B11 / 100) is 0.3 or more and 0.65 or less.

6. A cover member having a base a, a base b provided on said base a via an adhesive layer b, an anti-glare layer provided on said base b, and an anti-reflection film provided on said anti-glare layer, wherein the average visible light transmittance A (%) of said anti-reflection film is 85% or less, the average visible light transmittance B21 (%) of at least one of said base a and said adhesive layer b is 85% or less, and (A / 100) x (B21 / 100) is 0.3 or more and 0.65 or less.

7. The display unit according to claim 1 or 2, or the cover member according to any one of claims 3 to 6, wherein the anti-reflection film has a laminated structure in which at least two dielectric layers having different refractive indices are laminated, at least one of the dielectric layers being composed mainly of an oxide of Si, and at least one other layer of the laminated structure being composed mainly of a mixed oxide of at least one oxide selected from Group A consisting of Mo and W and at least one oxide selected from Group B consisting of Si, Nb, Ti, Zr, Ta, Al, Sn and In, and the content of the elements of Group B contained in the mixed oxide relative to the total of the elements of Group A contained in the mixed oxide and the elements of Group B contained in the mixed oxide is 65 mass% or less.

8. The display unit according to claim 1 or 2, or the cover member according to any one of claims 3 to 6, wherein the base a includes at least one of glass and resin.

9. The display unit according to claim 2 or the cover member according to claim 4 or 6, wherein the base b includes a resin.

10. The display unit according to claim 1 or 2, or the cover member according to any one of claims 3 to 6, having a luminous transmittance (Y) of 20 to 65%.

11. An in-vehicle display unit comprising the display unit according to claim 1 or 2, or an in-vehicle cover member comprising the cover member according to any one of claims 3 to 6.

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