JP2018105965A - Decorative member, display using the same, and method for manufacturing decorative member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a decorative member that can provide a predetermined light shielding property to a white decorative part, the decorative member capable of reducing the generation of peeling and cracking of the white decorative part when the decorative member is bent.SOLUTION: A decorative member of the present invention comprises a transparent substrate that has flexibility, and a white decorative part that is arranged on one face of the transparent substrate. The white decorative part has a plurality of white decorative layers; the plurality of white decorative layers are laminated in a thickness direction; when the white decorative layer, of the plurality of white decorative layers, arranged toward the transparent substrate is a first white decorative layer, the first white decorative layer has a thickness of 4 μm or less.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a decorative member having a transparent base material having flexibility and a white decorative portion arranged on one surface of the transparent base material, a display device using the decorative member, and a method for manufacturing the decorative member. .

  In recent years, with the development of display devices, the demand for flat panel display devices such as liquid crystal display devices and organic EL display devices has increased. Recently, in addition to televisions and personal computers, multifunctional terminals such as smartphones and tablet terminals are widely used, and the market for flat panel display devices is increasing. In such a situation, research on each member constituting the flat panel display device has been actively conducted.

  The member constituting the flat panel display device can be obtained, for example, by laminating a predetermined functional layer on a glass substrate. When such a member is used, a rigid flat panel display device is obtained. If the flat panel display device is rigid, for example, it becomes difficult to bend, and there is a problem that its use is limited. Therefore, for example, a flexible display device using a member in which a predetermined functional layer is laminated on a flexible transparent substrate has been proposed.

  Since the flexible display device can be freely deformed, for example, a rollable mobile display device can be realized, and there is an advantage that a display device more suitable for mobile can be obtained. Moreover, a flexible display apparatus can be manufactured by a continuous process using a long film, for example, and also has the advantage that it is excellent in productivity.

  By the way, in the current display device, a front plate protection base material may be disposed on the front surface of the display panel. Such a front plate protective base material is often used in, for example, a mobile phone having a touch panel function such as a smartphone. The front plate protection base material can be provided with a decorative portion that exhibits a predetermined color tone in order to improve the appearance of the display device. Specifically, the decoration unit is a member for hiding the non-display area in the display device from the viewing side of the display device, and can mainly hide wiring, control circuits, and the like arranged in the non-display area. Therefore, the decorating unit is required to have a light shielding property such that the wiring, the control circuit, and the like are not visually recognized from the viewing side of the display device.

  As such a front protective substrate, for example, Patent Document 1 discloses a front plate protective substrate 1 ′ in which a white decorative portion 2 ′ is disposed on a substrate 3 ′ as shown in FIG. Yes. Further, for example, Patent Document 2 discloses a front plate protective base material 1 ′ in which a white decorative portion 2 ′ and a backing layer 4 ′ are arranged on a base material 3 ′ as shown in FIG. . By providing a backing layer on the surface of the white decorative portion opposite to the viewing side, the light shielding property of the white decorative portion can be improved.

JP2013-200450A JP 2015-14733 A

  As the use of flexible display devices expands, the flexibility required for flexible display devices has increased. For this reason, the front plate protection substrate disposed on the surface of such a flexible display device is also required to have high flexibility so as to follow the flexible display device.

  Moreover, a white decoration part exists in the tendency for light-shielding property to be comparatively low compared with a black decoration part. Therefore, in the decorative member having the white decorative portion, it is necessary to increase the thickness of the white decorative portion from the viewpoint of hiding the non-display area in the display device from the viewing side of the display device. However, when the thickness of the white decorative portion is increased, the white decorative portion is peeled off or cracked when bent, which makes it difficult to use in a flexible display device. In addition, as disclosed in Citation 2, a technique for providing a backing layer on the surface opposite to the viewing side of the white decorative portion has been proposed, but in order to obtain a white decorative portion that exhibits a bright white color. However, there is a limit to reducing the thickness of the white decorative portion.

  The present invention has been made in view of the above circumstances, and is a decorative member that can impart a predetermined light-shielding property to a white decorative portion, and when the white decorative portion is bent, the white decorative portion is peeled off or cracked It aims at providing the decorating member which can suppress generation | occurrence | production of this.

  The inventors of the present invention have studied a decorative member that can suppress the peeling and cracking of the white decorative portion when the decorative member is bent. As a result, the white decorative portion is composed of a plurality of white decorative layers, and the white decorative layer is peeled off when the decorative member is bent by setting the thickness of the white decorative layer to a predetermined thickness. The inventors have found that the occurrence of cracks can be suppressed, and have completed the present invention. In addition, hereinafter, the fact that the white decoration part can be prevented from being peeled off or cracked when the decorative member is bent may be simply described as having bending resistance.

  That is, this invention has a transparent base material which has flexibility, and the white decorating part arrange | positioned at one surface of the said transparent base material, The said white decorating part has several white decorating layers. The plurality of white decorative layers are stacked in the thickness direction, and the white decorative layer arranged on the transparent substrate side among the plurality of white decorative layers is a first white decorative layer. When it is set as a layer, the thickness of the said 1st white decoration layer is 4 micrometers or less, The decoration member characterized by the above-mentioned is provided.

  According to this invention, a white decorating part has a some white decorating layer, and the thickness of the 1st white decorating layer arrange | positioned at the transparent base material side among several white decorating layers is 4 micrometers or less. By being, it can be set as a decorating member which can give predetermined | prescribed light-shielding property to a white decorating part, and can suppress generation | occurrence | production of a white decorating part and a crack when bent.

  In the present invention, it is preferable that the white decorative part is not cracked or peeled off after performing a bending durability test with a bending diameter of 3 mm 200,000 times. It can be set as the decorating member which can fully suppress peeling of a white decorating part and generation | occurrence | production of a crack, when bent.

  In this invention, it is preferable that the thickness of the said white decorating part is 22 micrometers or less. It can be set as the decorating member which can fully suppress peeling of a white decorating part and generation | occurrence | production of a crack, when bent.

  Moreover, this invention provides the display apparatus characterized by having the decorating member mentioned above and a display panel.

  According to this invention, the white decorating part in a decorating member has a some white decorating layer, and among the some white decorating layers, the thickness of the 1st white decorating layer arrange | positioned at the transparent base material side. When the thickness is 4 μm or less, a predetermined light-shielding property can be imparted to the white decorative portion, and a display device that can suppress the peeling and cracking of the white decorative portion when bent is provided. Can do.

  Furthermore, this invention is a transparent base material which has flexibility, and the manufacturing method of the decorating member which manufactures the decorating member which has a white decorating part arrange | positioned on the one surface of the said transparent base material, Comprising: On one surface of the transparent substrate, a white decorative portion forming step of forming a white decorative portion by laminating a plurality of white decorative layers in the thickness direction, the white decorative portion forming step is the above A first white decorative layer forming step of forming and heating a first white decorative layer on one surface of the transparent substrate, and a surface opposite to the transparent substrate of the first white decorative layer And a second white decorative layer forming step of forming and heating the second white decorative layer, and the thickness of the first white decorative layer is 4 μm or less, Provide a method.

  According to this invention, when a white decoration part formation process has a 1st white decoration layer formation process and a 2nd white decoration layer formation process, a desired 1st white decoration layer and a 2nd white decoration A layer can be formed. Therefore, a predetermined light-shielding property can be imparted to the white decorative portion, and a decorative member that can suppress peeling and cracking of the white decorative portion when bent is obtained.

  The present invention provides a decorative member capable of imparting a predetermined light-shielding property to a decorative portion, and capable of suppressing the occurrence of peeling and cracking of the decorative portion when bent. can do.

It is the schematic plan view and schematic sectional drawing which show an example of the decorating member of this invention. It is explanatory drawing for demonstrating the bending durability test in this invention. It is a schematic sectional drawing which shows the other example of the decorating member of this invention. It is a schematic sectional drawing which shows the other example of the decorating member of this invention. It is a schematic sectional drawing which shows the other example of the decorating member of this invention. It is a schematic sectional drawing which shows the other example of the decorating member of this invention. It is a schematic sectional drawing which shows the other example of the decorating member of this invention. It is a schematic plan view which shows an example of the display apparatus of this invention. It is a schematic process drawing which shows an example of the manufacturing method of the decorating member of this invention. It is a schematic sectional drawing which shows an example of the conventional decorating member. It is a schematic sectional drawing which shows the other example of the conventional decorating member.

  Hereinafter, a decorative member, a display device using the decorative member, and a method for manufacturing the decorative member will be described.

A. Decoration member The decoration member of this invention has a transparent base material which has flexibility, and the white decorating part arrange | positioned at one surface of the said transparent base material, The said white decorating part is a plurality of It has a white decoration layer, a plurality of the above-mentioned white decoration layers are laminated in the thickness direction, and among the above-mentioned white decoration layers, the above-mentioned white decoration layer arranged on the above-mentioned transparent substrate side When it is set as a 1st white decoration layer, it is a member characterized by the thickness of the said 1st white decoration layer being 4 micrometers or less.

The decorative member of the present invention will be described with reference to the drawings.
Fig.1 (a) is a schematic plan view which shows an example of the decorating member of this invention, FIG.1 (b) is the sectional view on the AA line of Fig.1 (a). As shown to Fig.1 (a), (b), the decorating member 1 of this invention is the transparent base material 3 which has flexibility, and the white decorating part 2 arrange | positioned on one surface of the transparent base material 3. As shown in FIG. And have. Moreover, the white decorating part 2 has a plurality of white decorating layers (here, the first white decorating layer 21 and the second white decorating layer 22), and the first white decorating layer 21 and the second white decorating layer. The decorative layer 22 is laminated in the thickness direction, and the thickness of the first white decorative layer 21 arranged on the transparent base material 3 side is 4 μm or less. Note that the display area D is defined by the white decorating unit 2.

  According to this invention, a white decorating part has a some white decorating layer, and the thickness of the 1st white decorating layer arrange | positioned at the transparent base material side among several white decorating layers is 4 micrometers or less. By being, it can be set as a decorating member which can give predetermined | prescribed light-shielding property to a white decorating part, and can suppress generation | occurrence | production of a white decorating part and a crack when bent. The reason why such an effect can be obtained is as follows.

  That is, in the present invention, the white decorative portion has a configuration composed of a plurality of white decorative layers, thereby providing desired light-shielding properties even when the thickness of the first white decorative layer is 4 μm or less. Is possible. Moreover, giving a desired flexibility to a 1st white decorating layer by making the thickness of the 1st white decorating layer arrange | positioned among the several white decorating layers into the transparent base material side into 4 micrometers or less. Can do. Furthermore, when the first white decorative layer is formed by setting the thickness of the first white decorative layer to 4 μm or less and a relatively thin thickness, the first white decorative layer is sufficiently used as a transparent substrate. It is considered that they can be adhered and can be prevented from peeling at the interface with the transparent substrate when bent. Furthermore, when the thickness of the first white decorative layer is 4 μm or less, the first white decorative layer can be sufficiently cured into the layer when the first white decorative layer is formed. Therefore, when bent, it is considered that the delamination within the layer caused by the difference in how the stress is applied within the first white decorative layer can be suppressed. In addition, such an effect is clear by the adhesion test of Experimental Examples 1 to 3 described later.

  The decorative member of the present invention preferably has a predetermined bending resistance. Here, the predetermined bending resistance means that the white decorative portion is not cracked or peeled after a bending durability test of a predetermined bending diameter is performed 200,000 times for the decorative member of the present invention. Moreover, the bending diameter in a bending durability test can be suitably adjusted according to the use etc. of the decorating member of this invention, and is not specifically limited. In the present invention, it is preferable that, after performing a bending endurance test with a bending diameter of 5 mm 200,000 times, it is preferable that the white decorative part is not cracked or peeled off. After that, it is preferable that the white decorative part is not cracked or peeled off. Even after the bending durability test is performed 200,000 times or more, it is preferable that the white decorative portion is not cracked or peeled off as in the above-described result.

  The bending durability test of the decorative member of the present invention can be performed as follows. For example, as shown in FIG. 2, the decorative member 1 in which the transparent base material 3 and the white decorative portion 2 are laminated is bent so as to have a predetermined bending diameter and fixed by the substrates a and b, and then the substrate This can be done by sliding a in the direction of the solid arrow. Here, the bending diameter means a distance indicated by a symbol R in FIG.

  Hereinafter, the white decoration part and transparent base material which comprise the decorating member of this invention are demonstrated.

1. White decoration part The white decoration part in this invention is a member which is arrange | positioned at one surface of a transparent base material, and has a some white decoration layer.

  The white decoration part in this invention is a decoration part which exhibits white. The term “white” as used herein is not only pure white (pure white) but also ivory, beige, reddish white (light pink), yellowish white, blueish white, greenish white, purple Examples thereof include light white, brownish white, blackish gray (light gray), silvery white, light white exhibiting chromatic color such as goldish white, and an achromatic color exhibiting white.

The color which the white decoration part in this invention exhibits can be prescribed | regulated based on the L ^* a ^* b ^* colorimetric system by International Lighting Commission CIE, for example. Specifically, in the L ^* a ^* b ^* color system, L ^* is preferably 85 or more, more preferably 88 or more, and particularly preferably 90 or more. ^{Further, L * a * b * a} * is in the color system, for example, is preferably in the range of -7 to 7, preferably in the range of inter alia -6 to 6, particularly -5 to It is preferable to be within the range of 5 or less. ^{Further, L * a * b * b} * is in the color system, for example, is preferably in the range of -7 to 7, preferably in the range of inter alia -6 to 6, particularly -5 to It is preferable to be within the range of 5 or less. “Pure white” means a ^* = 0 and b ^* = 0. The L ^* a ^* b ^* color system described above is a standard in JIS 8781-4: 2013. The values of L ^* , a ^* , and b ^{* in} the L ^* a ^* b ^* color system can be measured using a spectrophotometer CM-2600d manufactured by Konica Minolta.
In addition, the values of L ^* , a ^* , and b ^{* in} the L ^* a ^* b ^* color system of the white decorative portion in the present invention are the thickness of the white decorative portion and the pigment concentration contained in the white decorative portion. It can be achieved by adjusting.

The white decorative portion in the present invention preferably has a predetermined light shielding property. Here, the predetermined light-shielding property varies depending on the use of the decorative member of the present invention, but for example, the white decorative portion in the present invention can hide the wiring of the display device, the control circuit, etc. It is preferable that it is light-shielding. For example, the total light transmittance of the white decorative portion is preferably 30% or less, more preferably 25% or less, and particularly preferably 20% or less.
In addition, the total light transmittance of a white decoration part can be measured as follows. First, from the side where the white decoration part of the decorative member is formed, the light of the standard light source C by the International Lighting Commission CIE is applied perpendicularly to the decorative member, and the transmitted light transmitted through the decorative member is Yxy. A value obtained by dividing the Y value (%) in the color system by 100 is defined as the transmittance of the transmitted light. Next, only the transparent substrate is measured as a reference value, and the total light transmittance of the white decorative portion is calculated from the measured value obtained here and the transmittance of the transmitted light.
Moreover, the said total light transmittance of the white decoration part in this invention can be achieved by adjusting the thickness of the white decoration part, and the pigment density | concentration contained in a white decoration part.

The optical density of the decorative member when the thickness of the white decorative portion in the present invention is 20 μm is, for example, preferably 2.0 or more, more preferably 2.5 or more, and particularly 3.0. It is preferable that it is above, and it is more preferable that it is 3.5 or more.
Here, the optical density refers to an optical density (OD) value. Further, the OD value represented by the optical density is specified by “log ₁₀ (I _in / I _out )” using the intensity I _{in of the} incident light incident vertically and the intensity I _{out of the} transmitted light transmitted vertically. It can be measured by a microspectrophotometric colorimeter (manufactured by Olympus Corporation, OSP-SP200).
Moreover, the said OD value of the white decorating part in this invention can be achieved by adjusting the thickness of the white decorating part and the pigment concentration contained in the white decorating part.

The thickness of the white decoration part in this invention can be suitably adjusted according to the use of the decoration member of this invention, the number of layers of the white decoration layer which comprises a white decoration part, etc., and is not specifically limited. Moreover, although the thickness of the white decoration part in this invention is suitably adjusted according to the pigment density | concentration of the white pigment contained in a white decoration part, for example, the thickness of the grade which exhibits desired white, ie, L ^* a ^* It is preferable that L ^* in the b ^* color system has a thickness that is in the above-described range. Moreover, the more preferable thickness of the white decoration part in this invention is a crack of a white decoration part, after performing the bending durability test of a predetermined | prescribed bending diameter 200,000 times or more with respect to the decoration member of this invention, for example. Or it is preferable that it is the thickness of the grade which does not peel. The “predetermined bending diameter” can be appropriately adjusted according to the use of the decorative member of the present invention, and is not particularly limited, but may be, for example, a bending diameter of 3 mm.

  The specific thickness of the white decorative portion in the present invention is, for example, preferably within a range of 28 μm or less, more preferably within a range of 25 μm or less, and particularly within a range of 22 μm or less. preferable. When the thickness of the white decoration part in this invention exists in the said range, it can be set as the white decoration part which has desired light-shielding property. In addition, when the decorative member of the present invention is used in a display device having flexibility, it is possible to bend it freely, and effectively suppress the peeling and cracking of the white decorative member due to bending. it can.

  Hereinafter, the several white decorating layer which comprises the white decorating part in this invention is demonstrated.

(1) 1st white decoration layer In this invention, when the white decoration layer arrange | positioned at the transparent base material side is made into the 1st white decoration layer among several white decoration layers, it is 1st white decoration. The decorative layer has a thickness of 4 μm or less.

  Although the thickness of the 1st white decoration layer in this invention will not be specifically limited if it is 4 micrometers or less, Especially it is preferable that it is 3.5 micrometers or less, and it is especially preferable that it is 3.0 micrometers or less. When the thickness of the first white decorative layer is within the above range, when the decorative member of the present invention is bent, the in-layer peeling of the first white decorative layer can be suppressed, and as a result, the present invention. It becomes possible to suppress peeling of the white decorative part.

  The first white decorative layer in the present invention is usually a cured product in which a white pigment is contained in a resin binder containing a photosensitive resin. The pigment concentration of the white pigment relative to the total solid content of the first white decorative layer is not particularly limited as long as it can be a decorative layer exhibiting a predetermined white color. For example, depending on the thickness of the first white decorative layer, etc. It can be adjusted appropriately. The specific pigment concentration of the white pigment relative to the total solid content of the first white decorative layer is, for example, preferably in the range of 30% by mass to 70% by mass, and more preferably in the range of 40% by mass to 60% by mass. It is preferably within the range, and particularly preferably within the range of 45% by mass to 55% by mass. Since the pigment concentration of the white pigment with respect to the total solid content of the first white decorative layer is within the above range, when the decorative member of the present invention is used in a flexible display device, the outer peripheral portion of the display region is bright white. It is possible to exhibit excellent design properties. Moreover, since content of the resin binder used as the main component of a 1st white decoration layer can be restrained in a predetermined | prescribed range because the pigment concentration of a white pigment is in the said range, a 1st white decoration layer The thickness can be within a predetermined range, and a decrease in flex resistance can be suppressed.

  The white pigment used in the first white decorative layer in the present invention is preferably a pigment exhibiting a predetermined white color. Examples of such white pigments include titanium oxide, silica, talc, kaolin, clay, barium sulfate, and calcium hydroxide. Of these, titanium oxide is typical. The crystal form of titanium oxide includes a rutile type and an anatase type, but it is more preferable to use a rutile type. This is because the rutile type has lower catalytic activity than the anatase type and can suppress problems such as alteration of the resin binder during heating. In addition, only 1 type of white pigments may be used for the white pigment in this invention, and 2 or more types of white pigments may be mixed and used for it. Moreover, you may mix and use another colored pigment in a white pigment.

  It is preferable that the resin binder used for the 1st white decoration layer in this invention is a material which can disperse | distribute the white pigment mentioned above, for example, photosensitive resin is mentioned. Examples of the photosensitive resin include one type of photosensitive resin having a photoreactive group such as an acrylic resin, an epoxy resin, a polyimide resin, a polyvinyl cinnamate resin, and a reactive vinyl group such as a cyclized rubber. The above can be used. In the acrylic resin, for example, a photosensitive resin composed of an alkali-soluble resin, a polyfunctional acrylate monomer, a photopolymerization initiator, other additives, and the like can be used as the resin component of the resin binder.

As the alkali-soluble resin, at least one kind of methacrylic acid ester copolymer such as benzyl methacrylate-methacrylic acid copolymer, cardo resin such as epoxy acrylate having a bisphenol fluorene structure, and the like can be used. As the polyfunctional acrylate monomer, for example, one or more of trimethylolpropane tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate and the like are used. be able to.
In the present invention, (meth) acrylate means either methacrylate or acrylate.

  As the photopolymerization initiator, one or more known ones such as alkylphenone series, oxime ester series, triazine series and titanate series can be used. For example, in the alkylphenone series, 2-methyl-1 [4- (methylthio) phenyl] -2-morpholinopropan-1-one (Irgacure (registered trademark) 907, manufactured by BASF Japan Ltd.), 2-benzyl- In 2-dimethylamino-1- (4-monofoliophenyl) butanone-1 (Irgacure (registered trademark) 369, manufactured by BASF Japan Ltd.), an oxime ester system, 1,2-octanedione, 1- [4- ( Phenylthio) phenyl]-, 2- (O-benzoyloxime) (Irgacure (registered trademark) OXE01, manufactured by BASF Japan Ltd.) and the like can be used.

  The resin binder in the present invention can contain various known additives such as a photosensitizer, a dispersant, a surfactant, a stabilizer, and a leveling agent in addition to the materials described above.

  As described above, the first white decorative layer in the present invention is a cured product in which a white pigment is contained in a resin binder containing a photosensitive resin. The “cured product” as used herein is not limited to a cured product of only a photopolymerizable compound, and can be used as, for example, a dispersant, a surfactant, or an alkali-soluble resin blended for alkali development suitability. This refers to a cured product that can usually contain a non-photopolymerizable polymer and other non-photopolymerizable compounds.

The formation method of the 1st white decorating layer in this invention will not be specifically limited if it is a method which can form a desired 1st white decorating layer. For example, there is a so-called photolithography method in which a white photosensitive resin composition containing a white pigment and an uncured photosensitive resin is applied on a transparent substrate, which will be described later, and then exposed and developed in a predetermined pattern. Can be mentioned. The white decorative layer formed by the photolithography method can be made thinner than the white decorative layer formed by the screen printing method. Moreover, a white decoration layer can be formed with high linearity compared with the gravure printing method.
Examples of the coating method for applying the white photosensitive resin composition onto the transparent substrate include known methods such as spin coating, roll coating, die coating, spray coating, and bead coating. .

(2) Other white decoration layer In this invention, a white decoration part has a some white decoration layer. Therefore, it has another white decoration layer in the surface on the opposite side to the transparent base material of a 1st white decoration layer.

  The other white decorative layer in the present invention may be a single layer or a plurality of two or more layers. That is, the white decoration part in this invention may be comprised from the white decoration layer of two layers, and may be comprised from the white decoration layer of 3 layers or more. In this invention, it has 2 layers of other white decorating layers laminated | stacked on the 1st white decorating layer in particular, and a white decorating part is from 3 layers of white decorating layers containing a 1st white decorating layer. It is preferable to be configured. In addition, in this invention, the number of layers of the other white decoration layer laminated | stacked on a 1st white decoration layer shall be 6 layers or less, and the number of layers of the white decoration part in this invention shall be 7 layers or less. be able to.

  In this invention, the thickness of the other white decorating layer laminated | stacked on a 1st white decorating layer adjusts suitably according to the number of other white decorating layers, the use of the decorating member of this invention, etc. Although it is not specifically limited, For example, it is preferable that the thickness of the white decoration part comprised by a 1st white decoration layer and another white decoration layer becomes in the desired range mentioned above. The specific thickness of the other white decorative layer is, for example, preferably in the range of 1 μm to 18 μm, more preferably in the range of 1 μm to 12 μm, and particularly in the range of 1 μm to 6 μm. It is preferable that In this invention, when the thickness of the other white decoration layer laminated | stacked on a 1st white decoration layer is in the said range, predetermined | prescribed light-shielding property can be provided to a white decoration part, and When the decorative member of the present invention is bent, it is possible to suitably suppress the occurrence of peeling or cracking of the white decorative portion. In addition, the thickness of the other white decoration layer mentioned above is the thickness of the said one white decoration layer, when the other white decoration layer laminated | stacked on a 1st white decoration layer is one layer. When the other white decorative layers stacked on the first white decorative layer are a plurality of layers, this corresponds to the total thickness of the plurality of white decorative layers.

  About the material of other white decoration layers, the formation method, etc., since it can be the same as that of the material and formation method of the 1st white decoration layer mentioned above, description here is omitted.

2. Transparent base material The transparent base material in this invention is a member which has flexibility, and is a member which supports the white decorating part mentioned above.

  Here, “transparent” means that the operator of the display device using the decorative member of the present invention is transparent to the extent that the viewing from the operation surface is not hindered unless otherwise specified. Therefore, “transparent” includes colorless and transparent, and colored transparency that does not hinder visibility, and is not defined by strict transmittance, and the degree of transparency depends on the use of the decorative member of the present invention. Can be determined.

  The transparent base material in this invention will not be specifically limited if it is a member which has flexibility. Here, having flexibility can be confirmed by conducting a bending resistance test. For example, it can be confirmed by measuring under the conditions of a bending diameter R = 3 mm, a rotation speed 120 rpm / min, and a stroke 20 mm using a DLDMLH-FU planar body U-shaped repeating tester manufactured by Yuasa System Co., Ltd.

  As a material which comprises the transparent base material in this invention, it is preferable that it is a material which can provide predetermined | prescribed flexibility. Examples thereof include polyester resins such as polyimide (PI), polyethylene terephthalate (PET), and polyethylene naphthalate (PEN), or acrylic resins, polycarbonate resins, and cycloolefin resins. Depending on the thickness, a glass substrate can be used. In the present invention, PI is preferably used from the viewpoints of flexibility and heat resistance.

  The thickness of the transparent substrate in the present invention is preferably a thickness that has a predetermined flexibility and a rigidity that functions as a decorative member. The specific thickness of the transparent substrate is preferably within a range of 20 μm to 100 μm, more preferably within a range of 20 μm to 85 μm, and particularly preferably within a range of 30 μm to 60 μm. .

  As the transparent substrate in the present invention, a commercially available one may be prepared. For example, a desired transparent substrate may be formed by applying a predetermined resin composition on a glass substrate. Examples of the coating method for applying the resin composition onto the glass substrate include known methods such as spin coating, roll coating, die coating, spray coating, and bead coating.

3. Backing layer The decorating member of the present invention may have a backing layer on the surface of the white decorating portion opposite to the transparent substrate.

  FIG. 3 is a schematic cross-sectional view showing another example of the decorative member of the present invention. In this invention, it becomes possible to provide the outstanding light-shielding property by having the backing layer 41 in the surface on the opposite side to the transparent base material 3 of the white decoration part 2. FIG. Note that reference numerals not described in FIG. 3 can be the same as those in FIG.

  The backing layer in the present invention is usually a member having a higher light shielding property than the white decorative portion. Therefore, by providing a backing layer on the surface of the white decorative portion opposite to the transparent base material, for example, when the decorative member of the present invention is used for a display device, the white decorative portion is disposed on the outer peripheral portion of the display area in the display device. Wiring, control circuit, etc. can be hidden more suitably.

  The light shielding property of the backing layer in the present invention can sufficiently hide the wiring, control circuit, and the like arranged on the outer peripheral portion of the display area in the display device when the decorative member of the present invention is used in the display device. It is preferable that it has a light shielding property. Therefore, the light-shielding property of the backing layer can be adjusted as appropriate according to the light-shielding property of the white decorative portion, the use of the decorative member of the present invention, etc., and achieve the desired light-shielding property of the decorative member described above. It is preferable that the light shielding property is sufficient. For example, the total light transmittance of the backing layer is preferably 0.02% or less, more preferably 0.010% or less, and particularly preferably 0.005% or less. In addition, the total light transmittance of a backing layer can be measured by the same method as the total light transmittance of the decoration part mentioned above. Further, the total light transmittance of the backing layer can be achieved by adjusting the type of pigment, pigment concentration, and thickness of the backing layer contained in the backing layer.

  In the present invention, the optical density of the decorative member when the thickness of the backing layer is 1.5 μm is preferably 4.0 or more, and more preferably 4.3 or more. In addition, about the optical density mentioned above, since it can measure by the method similar to the optical density of the decorating member mentioned above, description here is abbreviate | omitted. In addition, the optical density of the decorative member having a backing layer is achieved by adjusting the pigment concentration and thickness of the white pigment contained in the white decorative portion, and further adjusting the pigment concentration and thickness of the pigment contained in the backing layer. Can do.

  The thickness of the backing layer in the present invention can be appropriately adjusted according to the use of the decorative member of the present invention, the thickness of the white decorative portion, etc., and is not particularly limited. In this invention, it is preferable that it is the thickness of the grade which can provide predetermined | prescribed light-shielding property by providing a backing layer. Further, the preferable thickness of the backing layer in the present invention is, for example, that the backing layer is not cracked or peeled after a bending durability test of a predetermined bending diameter is performed 200,000 times or more on the decorative member of the present invention. It is preferable that the thickness is of the order. The “predetermined bending diameter” can be appropriately adjusted according to the use of the decorative member of the present invention, and is not particularly limited, but may be, for example, a bending diameter of 3 mm.

  The specific thickness of the backing layer in the present invention is, for example, preferably in the range of 0.8 μm to 3.0 μm, and more preferably in the range of 0.8 μm to 2.5 μm. In the range of 0.8 μm or more and 1.5 μm or less. When the thickness of the backing layer in the present invention is within the above range, when the decorative member of the present invention is used in a display device, the wiring and control circuit arranged on the outer peripheral portion of the display area in the display device are sufficient. Can hide. Moreover, when the decorating member of this invention is used for the display apparatus which has flexibility, it becomes possible to bend freely and can suppress the peeling and the generation | occurrence | production of a backing layer by a bending, and generation | occurrence | production of a crack.

  For the backing layer in the present invention, for example, a black decorative portion containing a black pigment can be used. A black decoration part is the hardened | cured material in which the black pigment was contained in the resin binder containing photosensitive resin. The “cured product” as used herein is not limited to a cured product of only a photopolymerizable compound, and can be used as, for example, a dispersant, a surfactant, or an alkali-soluble resin blended for alkali development suitability. This refers to a cured product that can usually contain a non-photopolymerizable polymer and other non-photopolymerizable compounds.

  The black decoration part in this invention is a member which contains a black pigment and exhibits black. The term “black” as used herein means other than black with no color, for example, bluish black, greenish black, reddish black, brownish black, orangeish black, whited black, etc. The color of Examples of such black pigments include titanium black (low-order titanium oxide, titanium oxynitride, etc.), carbon black, and the like. Titanium black has the same concentration and the same film thickness as carbon black, and can provide a higher light-shielding property for visible light. Therefore, when titanium black is used, the thickness of the black decorative portion can be reduced as long as it has the same light shielding property as compared with the case where carbon black is used. In addition, only 1 type of black pigments may be used for the black pigment in this invention, and 2 or more types of black pigments may be mixed and used for it. Moreover, you may mix and use another colored pigment for a black pigment.

  About the resin binder used for the black decorating part in this invention, since it can be made to be the same as that of the resin binder described in the term of "1. White decorating part" mentioned above, description here is abbreviate | omitted.

  The formation method of the black decoration part in this invention will not be specifically limited if it is a method which can form a desired black decoration part. In addition, about the specific formation method of a black decorating part, since it can be made to be the same as that of the resin binder described in the term of "1. White decorating part" mentioned above, description here is abbreviate | omitted.

4). Adhesion auxiliary layer The decorative member of the present invention has an adhesion auxiliary layer between the transparent base material and the white decoration part for the purpose of improving the adhesion of the white decoration part to the transparent base material. May be. Specifically, as shown in FIG. 3, an adhesion auxiliary layer 31 may be provided between the transparent base material 3 and the white decorating part 2.

  The material of the adhesion auxiliary layer in the present invention is preferably a material that can improve the adhesion of the transparent base material of the white decorative portion, and examples thereof include resin materials such as epoxy resins, acrylic resins, and polyimide resins. It is done.

  The thickness of the adhesion auxiliary layer in the present invention is preferably a thickness that does not impair the flexibility of the decorative member of the present invention. Specifically, for example, it is preferably within a range of 0.3 μm or more and 0.7 μm or less.

  Examples of the method for forming the adhesion auxiliary layer in the present invention include a method of applying the adhesion auxiliary layer forming composition constituting the adhesion auxiliary layer on the transparent substrate. Examples of the coating method for applying the composition for forming an adhesion auxiliary layer on a transparent substrate include known methods such as a spin coating method, a roll coating method, a die coating method, a spray coating method, and a bead coating method.

5. Functional layer The decorative member of the present invention may have various functional layers in addition to the white decorative portion and the transparent substrate described above.

  The functional layer used for the decorative member of the present invention can be appropriately selected according to the application of the decorative member of the present invention, and is not particularly limited. Hereinafter, an example is given and demonstrated about the functional layer used for the decorating member of this invention.

(1) Light-shielding part This invention may have the light-shielding part which has a some opening part in the display area demarcated by the decoration part. Specifically, as shown in FIG. 4, the light shielding part 42 may be provided on the transparent substrate 3 and having an opening in the display area D defined by the white decorative part 2.

  The material of the light shielding part is preferably the same material as that of the black decorative part described above. When the decoration member of this invention has a black decoration part as a backing layer, a black decoration part and a light-shielding part can be formed simultaneously. Therefore, when the decoration member of this invention has a black decoration part as a backing layer, it becomes possible to form a light-shielding part, without increasing the number of processes. Further, the light shielding portion is usually formed by a photolithography method. Furthermore, it is preferable to form the black decorative portion by photolithography from the viewpoint of reducing the thickness. Thus, since both the light shielding part and the black decorative part can be formed by a photolithography method, it is preferable to form them simultaneously. In addition, about the specific material of a light-shielding part, since it can be made to be the same as that of the material of the black decorating part mentioned above, description here is abbreviate | omitted.

  The light shielding part in the present invention has a plurality of openings. The shape of the opening can be appropriately adjusted according to the design of the display device in which the decorative member of the present invention is used, and examples thereof include a triangular shape, a quadrangular shape, a rhombus shape, and a hexagonal shape.

  It is preferable that the thickness of the light shielding part is such that the function as the light shielding part can be exhibited. Especially, it is preferable that it is the same as the thickness of a black decoration part. It is because it can form simultaneously with a black decoration part. In addition, since the specific thickness of a light-shielding part can be made the same as the thickness of the white decorating part mentioned above, description here is abbreviate | omitted.

  In addition, the size, number, pitch, and the like of the plurality of openings arranged in the light-shielding portion can be appropriately adjusted according to the design of the display device in which the decorative member of the present invention is used. Description is omitted.

  As a method for forming the light shielding portion, a method similar to that for the light shielding portion used in a general display device can be used. For example, a method of forming a light shielding part layer by a sputtering method, a vacuum vapor deposition method, a coating method or the like and patterning the light shielding part layer by a photolithography method can be mentioned. Therefore, when simultaneously forming the light-shielding part and the black decorative part, on the transparent base material on which the white decorative part is formed, a layer made of the constituent material of the black decorative part and the light-shielding part is formed, and thereafter The black decorative part and the light-shielding part can be formed by patterning the layer by photolithography.

(2) Colored part In this invention, you may have a colored part in the opening part of a light-shielding part. In other words, the colored part is a pattern-like member disposed in the opening of the light shielding part. Specifically, as shown in FIG. 5, the colored portion 5 (here, the red colored portion 5R, the green colored portion 5G, and the blue colored portion 5B) may be provided in the opening of the light shielding portion 42.

  The colored part has, for example, three colored parts of red, green, and blue. The color of the colored portion may be any color as long as it contains at least three colors of red, green, and blue. For example, three colors of red, green, and blue, four colors of red, green, blue, and yellow, or red, Five colors such as green, blue, yellow, and cyan may be used.

As a coloring part, what disperse | distributed the coloring material in binder resin can be used, for example.
Examples of the color material used in the colored portion include pigments and dyes of each color. For example, examples of the color material used in the red colored layer include perylene pigments, lake pigments, azo pigments, quinacridone pigments, anthraquinone pigments, anthracene pigments, and isoindoline pigments. Examples of the colorant used for the green colored layer include phthalocyanine pigments such as halogen polysubstituted phthalocyanine pigments or halogen polysubstituted copper phthalocyanine pigments, triphenylmethane basic dyes, isoindoline pigments, and isoindoline pigments. Examples include linone pigments. Furthermore, examples of the color material used in the blue colored layer include copper phthalocyanine pigments, anthraquinone pigments, indanthrene pigments, indophenol pigments, cyanine pigments, dioxazine pigments, and the like. These pigments and dyes may be used alone or in combination of two or more. Examples of the binder resin used for the colored portion include photosensitive resins having reactive vinyl groups such as acrylate, methacrylate, polyvinyl cinnamate, or cyclized rubber.

  In addition to the above-described materials, the colored portion may contain a photopolymerization initiator, a sensitizer, a coatability improver, a development improver, a crosslinking agent, a polymerization inhibitor, a plasticizer, a flame retardant, etc. It can be included.

  Moreover, the white layer which does not contain the color material mentioned above but contains binder resin may be formed on the same plane in which the colored part is formed.

  The arrangement of the colored portions is not particularly limited, and may be a known arrangement such as a stripe type, a mosaic type, a triangle type, or a four-pixel arrangement type.

  The thickness of the colored portion can be the same as the thickness of a general colored portion in a color filter, and can be set within a range of 1 μm or more and 5 μm or less, for example.

  Examples of the forming method for forming the patterned colored portion in the opening of the light shielding portion include a photolithography method, an ink jet method, and a printing method.

(3) Sensor electrode In this invention, you may have a sensor electrode which can detect the position of a touch panel on a light-shielding part.

  In the present invention, any sensor electrode capable of detecting the position of the touch panel may be used, and a sensor electrode used for a general touch panel can be used. In general, the sensor electrode in the present invention preferably has a mesh-like first electrode and second electrode. Specifically, as shown in FIG. 6, the first electrode 6 a and the second electrode 6 b may be provided on the light shielding portion 42. In FIG. 6, the first electrode 6 a and the second electrode 6 b are alternately arranged on the adjacent light shielding portions 42, and the first electrode 6 a and the second electrode 6 b are interposed between the first electrode 6 a and the second electrode 6 b. In the example, the insulating layer 7 for electrically insulating the two electrodes 6b is disposed, and the protective layer 8 is disposed on the second electrode 6b.

  For example, Japanese Patent No. 4610416, Japanese Patent Application Laid-Open No. 2010-286886, Japanese Patent Application Laid-Open No. 2004-192093, and Japanese Patent Application Laid-Open No. 2010-202093 are the shape of the first electrode and the second electrode in the sensor electrode in plan view and plan view. Since it can be the same as that of a sensor electrode used for a general touch panel as disclosed in Japanese Patent Application Laid-Open No. -277392, Japanese Patent Application Laid-Open No. 2011-129501, etc., description thereof is omitted here.

  Examples of the material used for the sensor electrode include silver, gold, chromium, platinum, aluminum alone, or an alloy mainly composed of any of these. As the metal alloy, an alloy of silver, palladium and copper called APC is widely used. As the metal composite, a three-layer structure of molybdenum, aluminum, and molybdenum called MAM is also applicable. Furthermore, for example, a conductive polymer obtained by adding the above metal to a resin material such as PEDOT can be used.

  The sensor electrode in the present invention is preferably disposed on the above-described light shielding portion. Therefore, the line width of the sensor electrode can be appropriately adjusted according to the line width of the light shielding part, but is preferably equal to or less than the line width of the light shielding part. The specific sensor electrode line width is, for example, preferably in the range of 1.0 μm to 28 μm, more preferably in the range of 1.5 μm to 23 μm, particularly 2.0 μm to 20 μm. It is preferable to be within the following range. When the line width of the sensor electrode is within the above range, the sensor electrode can be suitably arranged on the light shielding portion, and when the decorative member of the present invention is used for the display device, the visibility of the display device is improved. The influence of can be suppressed. Moreover, peeling and a crack of a sensor electrode at the time of bending the decorating member of this invention can be suppressed effectively.

  Moreover, it is preferable that the thickness of the sensor electrode is a thickness that can exhibit the conductivity sufficient to detect the position of the touch panel. The thickness of the sensor electrode is, for example, preferably in the range of 10 nm to 1000 nm, more preferably in the range of 50 nm to 800 nm, and particularly preferably in the range of 100 nm to 200 nm. When the thickness of the sensor electrode is within the above range, peeling and cracking of the sensor electrode when the decorative member of the present invention is bent can be effectively suppressed.

  As a method for forming the sensor electrode, for example, a method capable of forming a mesh-like first electrode and second electrode is preferable. Specifically, there is a method of forming a conductive layer using a conductive material constituting the sensor electrode, then forming a resist pattern on the conductive layer, and etching the conductive layer using the resist pattern as a mask. It is done. At this time, as a method for forming the conductive layer, for example, a dry process such as a vacuum deposition method, a sputtering method, a CVD method, or an ion plating method can be used.

(4) Circularly polarizing plate In this invention, you may have a circularly polarizing plate in the display area demarcated by the white decorating part. Specifically, as shown in FIG. 7, a circularly polarizing plate 9 may be provided in the display region D defined by the white decorative portion 2, and in this case, the flat portion is flat in the opening of the white decorative portion 2. A layer 11 can be disposed.

  The circularly polarizing plate in the present invention may be the same as that used in a general display device, and may have, for example, a polarizing plate and various retardation layers.

  The polarizing plate used for the circularly polarizing plate, for example, decomposes the transmitted light into two orthogonally polarized components, transmits the polarized component in one direction (a direction parallel to the transmission axis), and is orthogonal to the one direction. The polarized component in the other direction (direction parallel to the absorption axis) can be absorbed. Such a polarizing plate can be formed by adsorbing and orienting iodine compound molecules on a film material made of polyvinyl alcohol (PVA).

  Examples of the retardation layer include a retardation layer having an in-plane retardation value corresponding to λ / 4, a retardation layer having an in-plane retardation value corresponding to λ / 2, and a positive C plate (+ C plate). ) And the like. About the combination and structure of a phase difference layer, it can adjust suitably according to the use etc. of the decorating member of this invention, and it does not specifically limit.

(5) Other functional layer The decorating member of this invention should just have the transparent base material and white decorating part which were mentioned above, and may have another functional layer as needed. Examples of other functional layers include a planarizing layer, an adhesive layer, an insulating layer, a protective layer, and an antireflection layer.

(A) Flattening layer The flattening layer in this invention can be arrange | positioned in the area | region in which the white decoration part is not formed on the transparent base material, ie, the opening part of a white decoration part. When the flattening layer is disposed, the decorative member can be easily installed when the decorative member of the present invention is used in a display device.

  As the material constituting the planarizing layer in the present invention, it is preferable to use a material having a predetermined light transmission property and a predetermined bending property like the white decorative portion. Specifically, a resin material can be used. In addition, about the resin material used for a planarization layer, since it can be the same as that of the resin material used for the transparent base mentioned above, description here is abbreviate | omitted.

  The thickness of the planarizing layer is preferably such a thickness that the above-described effects can be obtained by providing the planarizing layer. Specifically, it is preferable that the thickness is equal to the thickness of the white decorative portion described above or thinner than the thickness of the white decorative portion.

(B) Adhesive layer The adhesive layer in this invention can be arrange | positioned in the area | region in which the white decoration part is not formed on the transparent base material, ie, the opening part of a white decoration part. By arrange | positioning the adhesion layer, when using the decorating member of this invention for a display apparatus, it becomes possible to affix a decorating member easily.

  As the material constituting the pressure-sensitive adhesive layer in the present invention, it is preferable to use a material having a predetermined light transmittance and a predetermined flexibility as in the case of the white decorative portion. Specifically, a general material such as a photocurable resin or a thermosetting resin can be used.

  The thickness of the pressure-sensitive adhesive layer is preferably such a thickness that the decorative member of the present invention can be bonded to the display device, for example. Specifically, it is preferable that the thickness is equal to the thickness of the white decorative portion described above or thicker than the white decorative portion.

(C) Insulating layer When the sensor electrode 6 has the mesh-like 1st electrode 6a and the 2nd electrode 6b as shown by the code | symbol 7 of FIG. It can be used when the second electrode 6b is electrically insulated.

  The material of the insulating layer in the present invention is preferably a material having a desired insulating property, and materials generally used for touch panels can be used. Specifically, a light-transmitting acrylic resin, siloxane resin, or the like can be given.

  The thickness of the insulating layer is preferably a thickness that can electrically insulate the first electrode and the second electrode and prevent a short circuit, for example. The specific thickness of the insulating layer can be the same as the thickness of the insulating layer used in a general touch panel, and can be, for example, in the range of 0.5 μm to 3 μm.

(D) Protective layer The protective layer in this invention can be arrange | positioned so that a white decorating part and an opening part may be covered on the surface by which the white decorating part of the transparent base material was formed. For example, as indicated by reference numeral 8 in FIG. 6, when the sensor electrode 6 has a mesh-like first electrode 6a and second electrode 6b, the sensor electrode 6 can be disposed so as to cover the second electrode 6b. By providing the protective layer, the protective function of the decorative member of the present invention can be enhanced.

  As the material constituting the protective layer in the present invention, it is preferable to use a material having a predetermined light transmittance and a predetermined flexibility. For example, the resin material which can be used for a general protective layer is mentioned, It is preferable that it is a resin material which has heat resistance and abrasion resistance especially. Specifically, an epoxy resin, an acrylic resin, a polyimide resin, etc. are mentioned.

  The thickness of the protective layer is preferably such a thickness that can exert a protective function as a protective layer, for example, and does not impair the flexibility of the decorative member of the present invention. Specifically, for example, it is preferably in the range of 1 μm or more and 5 μm or less.

(E) Antireflection layer The antireflection layer in this invention can be arrange | positioned so that a white decorating part and an opening part may be covered on the surface of the side in which the white decorating part of the transparent base material was formed. By disposing the antireflection layer, reflection of external light onto the surface of the decorative member of the present invention can be suppressed, and visibility can be improved.

  As the material constituting the antireflection layer of the present invention, it is preferable to use a material having a predetermined light transmittance and a predetermined flexibility. Specifically, since materials that can be used for a general antireflection layer can be given, description thereof is omitted here.

  The thickness of the antireflection layer is preferably such that it can exhibit an antireflection function as an antireflection layer, for example, and does not impair the flexibility of the decorative member of the present invention. Note that the specific thickness of the antireflection layer can be appropriately adjusted according to the material constituting the antireflection layer, and thus the description thereof is omitted here.

(F) Infrared transmission window In this invention, the infrared transmission window may be formed of the white decoration part. An infrared transmission window is a part which shields visible light and permeate | transmits infrared light, for example, functions when the decoration member of this invention is used for the mobile telephone provided with touchscreen functions, such as a smart phone. Specifically, a mobile phone with a touch panel function is used to prevent malfunction of the touch panel when the mobile phone is put on the ear during a call, or to extend the battery life by turning off the display panel. Although a human sensor that senses the approach of human skin can be preferably used, the infrared transmission window functions as this human sensor.

  When an infrared transmission window is formed by the white decoration part, so as to cover the infrared transmission window formed between the transparent base material and the white decoration part having the infrared transmission window or in the white decoration part. An infrared transmission layer is disposed. Note that the specific configuration of the infrared transmission window, the infrared transmission layer, and the like can be the same as, for example, Japanese Patent No. 539261, and thus the description thereof is omitted here.

  The infrared transmission window is preferably formed by a method capable of forming a desired infrared transmission window. For example, it is preferable to form the infrared transmission window at the same time as the step of forming the white decorative portion. Specifically, a white photosensitive resin composition containing a white pigment and an uncured photosensitive resin is applied on a transparent substrate, and then exposed and developed in a predetermined pattern, so-called photolithography method. When the white decorative part is formed by patterning with the above, it is preferable to form the infrared transmission window by patterning at the same time. This is because an additional step of forming the infrared transmission window is not required, and thus an increase in the manufacturing process due to the formation of the infrared transmission window can be suppressed.

  In addition, the infrared transmission layer disposed in the infrared transmission window is applied with an infrared transmitting composition for forming the infrared transmitting layer on a transparent substrate, and then exposed and developed in a predetermined pattern. It can be formed by patterning by a so-called photolithography method.

B. Display device The display device of the present invention is a device having the above-described decorative member and a display panel.

  FIG. 8 is a schematic plan view showing an example of the display device of the present invention. As shown in FIG. 8, in the present invention, the decorative member 1 and the display panel 20 may be included. Moreover, when the decorating member 1 does not have a touch panel function, the display device 100 of the present invention may include the touch panel 10 between the decorating member 1 and the display panel 20.

  Note that the specific configuration of the display device of the present invention can be the same as that of Japanese Patent No. 5392641, for example, and detailed description thereof is omitted here.

According to this invention, the white decorating part in a decorating member has a some white decorating layer, and among the some white decorating layers, the thickness of the 1st white decorating layer arrange | positioned at the transparent base material side. When the thickness is 4 μm or less, a predetermined light-shielding property can be imparted to the white decorative portion, and a display device that can suppress the peeling and cracking of the white decorative portion when bent is provided. Can do.
In addition, about a specific effect, since it can be made to be the same as that of the content described in the term of the said "A. decoration member", description here is abbreviate | omitted.

Although the display apparatus of this invention will not be specifically limited if it has the decorating member and display panel which were mentioned above, It is preferable to have predetermined | prescribed flexibility.
Here, the predetermined flexibility means that no defect occurs in the characteristics of the display device after the bending durability test is performed 200,000 times for the display device of the present invention.
Note that the bending diameter when the bending durability test of the display device is performed is not particularly limited because it can be appropriately adjusted according to the use of the display device and the like. In the present invention, for example, a bending durability test can be performed at a bending diameter of 3 mm. Further, a specific bending durability test method can be the same as the method described in FIG.

  Hereinafter, the decorative member, the display panel, and the touch panel which constitute the display device of the present invention will be described.

1. Decorating member The decorating member in this invention has a transparent base material which has flexibility, and the white decorating part arrange | positioned on the one surface of the said transparent base material, The said white decorating part is several. It has a white decoration layer, a plurality of the above-mentioned white decoration layers are laminated in the thickness direction, and among the above-mentioned white decoration layers, the above-mentioned white decoration layer arranged on the above-mentioned transparent substrate side When it is set as a 1st white decoration layer, it is a member characterized by the thickness of the said 1st white decoration layer being 4 micrometers or less. In addition, about a decorating member, since it can be made to be the same as that of the content described in the term of the said "A. decorating member", description here is abbreviate | omitted.

2. Display panel The display panel in the present invention is typically a liquid crystal display panel or an electroluminescence (EL) panel, but may be an electronic paper panel, a display device using a cathode ray tube, or various known display panels.

  The above-described display panel can be the same as that used in a general display device, and thus a specific description thereof is omitted here.

3. Touch Panel The touch panel in the present invention is typically a projected capacitive touch panel capable of multi-touch (multi-point simultaneous input). In addition, a surface capacitive touch panel, a resistive touch panel, electromagnetic Any of various known position detection touch panels including a position detection method that does not require a transparent electrode, such as a guidance method and an optical method, can be used.

  The touch panel may have some opaque components such as wiring, a control circuit, and a connector for electrically connecting them to the outer peripheral portion of the display area in the display device. It is preferable that these opaque components are arranged so as to overlap with an opaque region in which a white decorative portion is arranged in the decorative member in plan view. It is because an opaque component can be hidden by a white decoration part and the external appearance of a display apparatus can be improved.

4). Applications The display device of the present invention includes, for example, mobile phones such as smartphones, portable information terminals such as tablet PCs, personal computers, car navigation systems, digital cameras, electronic notebooks, game machines, vending machines, ATM terminals, POS A terminal etc. are mentioned.

C. The manufacturing method of a decorating member The manufacturing method of the decorating member of this invention manufactures the decorating member which has a transparent base material which has flexibility, and the white decorating part arrange | positioned at the one surface of the said transparent base material. It is a manufacturing method of a decorating member, Comprising: It has a white decorating part formation process of laminating a plurality of white decorating layers in the thickness direction on one side of the transparent base material, and forming the white decorating part The first white decorative layer forming step includes forming a first white decorative layer on one surface of the transparent substrate and heating the first white decorative layer, and the first white decorative layer. A second white decorative layer forming step of forming and heating a second white decorative layer on a surface opposite to the transparent substrate, and the thickness of the first white decorative layer is 4 μm or less. It is a method characterized by being.

  Fig.9 (a)-FIG.9 (d) are schematic process drawings which show an example of the manufacturing method of the decorating member of this invention. The manufacturing method of the decorating member of this invention prepares the transparent base material 3 as shown to Fig.9 (a), and next, as shown to FIG.9 (b), pattern shape on the transparent base material 3 is shown. The first white decorative layer forming step of forming and heating the first white decorative layer 21 and the side of the first white decorative layer 21 opposite to the transparent substrate 3 as shown in FIG. A second white decorative layer forming step of forming and heating a patterned second white decorative layer 22 on the surface.

  Moreover, as a method of bonding the decorating member of the present invention to the display device, as shown in FIG. 9D, the decorating member is placed on the carrier glass 13, and thereafter, although not shown, the decorating is performed. There is a method in which the member is bonded to the display device and finally the carrier glass is peeled off. In addition, when arrange | positioning the decorating member of this invention on carrier glass, as shown to FIG.9 (b)-(d), after forming a decorating member, you may arrange | position on carrier glass, Or you may arrange | position a decorating member on carrier glass by arrange | positioning a transparent base material on carrier glass, and forming a white decorating part after that. Moreover, you may have the adhesive layer which can be removed again between a transparent base material and carrier glass. Since the said adhesion layer can be used as the general adhesion layer used for a display apparatus, description here is abbreviate | omitted.

  According to this invention, when a white decoration part formation process has a 1st white decoration layer formation process and a 2nd white decoration layer formation process, a desired 1st white decoration layer and a 2nd white decoration A layer can be formed. Therefore, a predetermined light-shielding property can be imparted to the white decorative portion, and a decorative member that can suppress peeling and cracking of the white decorative portion when bent is obtained. The reason why such an effect can be obtained is as follows.

  That is, in the present invention, the first white decorative layer forming step is a step of forming and heating the first white decorative layer, and the second white decorative layer forming step is the second white decorative layer forming step. It is a process of forming and heating a layer. As described above, the first white decorative layer forming step and the second white decorative layer forming step are steps in which the white decorative layer can be sufficiently cured by heating after forming the white decorative layer, respectively. Therefore, it is considered that the first white decorative layer can be sufficiently adhered to the transparent substrate, and that peeling at the interface with the transparent substrate can be suppressed when bent. Moreover, it is thought that the peeling in a layer which arises by the difference in how the stress is applied in the layer of a 1st white decoration layer can be suppressed. In addition, such an effect is clear by the adhesion test of Experimental Examples 1 to 3 described later. Further, other specific effects can be the same as the contents described in the section “A. Decorating member”, and therefore, description thereof is omitted here.

  Hereinafter, the manufacturing method of the decorating member of this invention is demonstrated in detail.

1. White decorative portion forming step The white decorative portion forming step in the present invention is a step of forming a white decorative portion by laminating a plurality of white decorative layers in the thickness direction on one surface of the transparent substrate. The first white decorative layer forming step of forming and heating the first white decorative layer on one surface of the transparent substrate, and the first white decorative layer on the surface opposite to the transparent substrate, It is a process which has a 2nd white decoration layer formation process which forms and heats 2 white decoration layers.

The white decoration part formation process in this invention should just be a process which has a 1st white decoration layer formation process and a 2nd decoration layer formation process. In this invention, when the white decoration layer which comprises a white decoration part is comprised from 3 layers of a 1st white decoration layer, a 2nd white decoration layer, and a 3rd white decoration layer, for example. It is preferable to have a 1st white decoration layer formation process, a 2nd white decoration layer formation process, and a 3rd white decoration layer formation process, for example, the white decoration layer which comprises a white decoration part is 1st. When comprised from four layers of a white decoration layer, a 2nd white decoration layer, a 3rd white decoration layer, and a 4th white decoration layer, a 1st white decoration layer formation process, a 2nd white decoration It is preferable to have a layer formation process, a 3rd white decoration layer formation process, and a 4th white decoration layer formation process. That is, it is preferable that the white decoration part formation process in this invention has a white decoration layer formation process which forms a white decoration layer according to the structure of the white decoration part obtained by this invention.
Hereinafter, each step will be described.

(1) 1st white decoration layer formation process The 1st white decoration layer formation process in this invention is a process of forming and heating a 1st white decoration layer in one surface of a transparent base material.

  In the 1st white decoration layer formation process in the present invention, as a method of forming the 1st white decoration layer on one side of a transparent substrate, a desired 1st white decoration layer is formed on a transparent substrate. The method is not particularly limited as long as it can be used. Since the white decoration part in this invention is a member normally formed in pattern shape, as a formation method of a 1st white decoration layer, the photolithography method, the screen printing method, the gravure printing method, the inkjet method, for example And the like. In addition, as a coating method used in the case of the photolithography method, a known method such as a spin coating method, a roll coating method, a die coating method, a spray coating method, or a bead coating method can be used.

  In the first white decorative layer forming step in the present invention, the first white decorative layer can be formed using the first white decorative layer forming composition that constitutes the first white decorative layer. The first white decorative layer forming composition is, for example, a composition containing a color pigment, a resin binder, and a solvent. The solvent used here is preferably a material capable of dissolving or dispersing each component, and examples thereof include propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, ethyl cellosolve, and 3-methoxybutyl acetate. . A solvent may be used individually by 1 type and may be used in mixture of 2 or more types.

  In the 1st white decorating layer formation process in this invention, it heats, after forming a 1st white decorating layer in one surface of a transparent base material. The heating here refers to so-called post-cure in which the first white decorative layer is formed in a predetermined pattern and then heated as the final step. Specifically, it means heating at a temperature at which the first white decorative layer can be cured, and the temperature can be appropriately adjusted according to the material constituting the first white decorative layer. it can. The specific heating temperature is preferably in the range of 200 ° C. or higher and 220 ° C. or lower, for example, preferably in the range of 200 ° C. or higher and 210 ° C. or lower, particularly in the range of 200 ° C. or higher and 205 ° C. or lower. It is preferable that When the heating temperature in the first white decorative layer forming step is within the above range, the first white decorative layer can be sufficiently cured. Therefore, after the bending durability test of a predetermined bending diameter is performed 200,000 times or more on the decorative member obtained by the present invention, the in-layer peeling of the first white decorative layer can be effectively suppressed. A decorative member having excellent bending resistance can be obtained.

  Moreover, the time of the heating performed in the 1st white decoration layer formation process in this invention can be suitably adjusted according to the heating temperature mentioned above, the material of the 1st decoration layer, etc., and is not specifically limited. For example, it can be in the range of 15 minutes or more and 60 minutes or less.

  About the material, thickness, etc. of the 1st white decorating layer obtained in the 1st white decorating layer formation process in this invention, it mentioned "A. decorating member 1. white decorating part (1) 1st white decorating. Since it can be the same as that described in the section of “Layer”, description thereof is omitted here.

(2) 2nd white decoration layer formation process The 2nd white decoration layer formation process in this invention forms a 2nd white decoration layer in the surface on the opposite side to the transparent base material of a 1st white decoration layer. And heating.

  About the method of forming and heating the second white decorative layer in the second white decorative layer forming step in the present invention, the contents described in the above-mentioned section “(1) First white decorative layer forming step”. Therefore, description thereof is omitted here. Moreover, about the material, thickness, etc. of the 2nd white decorating layer obtained in the 2nd white decorating layer formation process in this invention, it mentioned "A. decorating member 1. white decorating part (2) 2nd white. Since it can be the same as the content described in the section of “decorative layer”, the description here is omitted.

(3) Other white decoration layer formation process In this invention, the white decoration layer which comprises a white decoration part is other white decoration besides a 1st white decoration layer and a 2nd white decoration layer. When it has a layer, you may have another white decoration layer formation process.

  The other white decoration layer formation process in this invention is a process of forming and heating another white decoration layer. Therefore, when the white decoration layer which comprises the white decoration part in this invention has a 3rd white decoration layer other than a 1st white decoration layer and a 2nd white decoration layer, it is 2nd white decoration. After a decoration layer formation process, it has the 3rd white decoration layer formation process which forms and heats the 3rd white decoration layer on the surface on the opposite side to the 1st white decoration layer of the 2nd white decoration layer. It is preferable.

  About the method of forming and heating other white decoration layers in the other white decoration layer formation process in this invention, the content described in the item of "(1) 1st white decoration layer formation process" mentioned above. Therefore, description thereof is omitted here. Moreover, about the material of the other white decoration layer obtained in the other white decoration layer formation process in this invention, thickness, etc., "A. decoration member 1. White decoration part (3) Other white" mentioned above. Since it can be the same as the content described in the section of “decorative layer”, the description here is omitted.

2. Functional layer formation process When the decorating member obtained by this invention has a functional layer, the manufacturing method of the decorating member of this invention may have the functional layer formation process which forms a functional layer.

  About the functional layer obtained by the functional layer formation process in this invention, and its formation method, since it can be made to be the same as that of the content described in the above-mentioned "A. decoration member 5. Functional layer", it is here. Is omitted.

  The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, and the present invention has substantially the same configuration as the technical idea described in the claims of the present invention, and any device that exhibits the same function and effect is the present invention. It is included in the technical scope of the invention.

[Experiment 1 to Experiment 3]
A first white decorative layer was formed on a transparent base material (material: polyimide, thickness: 50 μm) using the following white decorative layer forming composition. Heating in the first white decorative layer forming step was performed under conditions of temperature: 200 ° C. and time: 30 minutes. As the white decorative layer forming composition, a photosensitive resin composition having a white pigment and mainly composed of an acrylic resin and an alkali-soluble resin was used.

[Evaluation]
About the 1st white decoration layer obtained by Experimental example 1-Experimental example 3, bending resistance and adhesiveness were evaluated.

The bending resistance was evaluated from the presence or absence of cracking of the first white decorative layer after performing a bending durability test with a bending diameter of 3 mm over 200,000 times. The sample size used for the bending durability test was 30 mm × 50 mm.
The bending endurance test was conducted by an internal bending slider method.

  In addition, the adhesiveness is obtained by cutting the first white decorative layer formed on the transparent substrate into 100 squares, which is 10 squares in the vertical direction and 10 squares in the horizontal direction, by the thickness of the first white decorative layer. Then, by attaching an adhesive tape to the surface of the first white decorative layer and measuring the number of masses of the first white decorative layer remaining on the transparent substrate when the adhesive tape is peeled off, the evaluation is performed. did. A cutter guide was used for cutting the first white decorative layer.

  The evaluation results are shown in Table 1.

  As shown in Table 1, predetermined adhesiveness could be obtained when the thickness of the first white decorative layer was 4 μm or less. Thereby, when the 1st white decorating layer of this invention was 4 micrometers or less, when the decorating member of this invention was bent, it turned out that peeling of a white decorating part can be suppressed. In addition, peeling here includes in-layer peeling of a 1st white decoration layer other than peeling from the interface of a white decoration part and a transparent base material.

[Examples and comparative examples]
A plurality of white decorative layers were formed on the transparent substrate by the same method as in Experimental Examples 1 to 3, and decorative members having a white decorative portion as shown in Table 2 were obtained.

[Evaluation]
About the decorative member obtained by Example 1, 2 and the comparative example, bending resistance and adhesiveness were evaluated. The bending resistance was evaluated from the presence or absence of cracks in the white decorative part after performing a bending durability test with a bending diameter of 3 mm as described in FIG. The sample size used for the bending durability test was 30 mm × 50 mm.
In addition, the adhesiveness cut the white decorative part formed on the transparent substrate into 100 squares, which is 10 squares in the vertical direction and 10 squares in the horizontal direction, by the thickness of the white decorative part, It evaluated by measuring the mass number of the white decorating part which remains on a transparent base material when an adhesive tape was made to adhere to the surface of a white decorating part, and the adhesive tape was peeled off. A cutter guide was used for cutting the white decorative portion.
The evaluation results are shown in Table 3.

As shown in Table 2, although the thickness of the 1st white decoration layer of Examples 1 and 2 is 3 micrometers, it may have an optical density equivalent to the comparative example whose thickness of the 1st white decoration layer is 10 micrometers. I understood.
Moreover, as shown in Table 3, as a result of evaluating the decorative members of Examples 1 and 2 and the comparative example, in Examples 1 and 2 in which the thickness of the first white decorative layer is 3 μm, the first white decorative Compared to the comparative example in which the thickness of the layer is 10 μm, which is thicker than 4 μm, it was possible to suppress cracking and peeling of the white decorative part when bent.

DESCRIPTION OF SYMBOLS 1 ... Decorating member 2 ... White decorating part 21 ... 1st white decorating layer 22 ... 2nd white decorating layer 3 ... Transparent base material 100 ... Display apparatus

Claims (5)

A transparent substrate having flexibility;
A white decorative portion disposed on one surface of the transparent substrate,
The white decorative portion has a plurality of white decorative layers,
The plurality of white decorative layers are laminated in the thickness direction,
Among the plurality of white decorative layers, when the white decorative layer disposed on the transparent substrate side is the first white decorative layer, the thickness of the first white decorative layer is 4 μm or less. A decorative member characterized by.   The decorative member according to claim 1, wherein the white decorative part is not cracked or peeled off after performing a bending durability test with a bending diameter of 3 mm 200,000 times.   The decorative member according to claim 1 or 2, wherein the white decorative portion has a thickness of 22 µm or less. A decorative member according to any one of claims 1 to 3, and
A display device comprising: a display panel. A method for producing a decorative member for producing a transparent base material having flexibility, and a decorative member having a white decorative portion arranged on one surface of the transparent base material,
On one surface of the transparent substrate, a white decorative portion forming step of forming the white decorative portion by laminating a plurality of white decorative layers in the thickness direction,
The white decorative portion forming step includes a first white decorative layer forming step of forming and heating a first white decorative layer on one surface of the transparent substrate, and the first white decorative layer. A second white decorative layer forming step of forming and heating a second white decorative layer on the surface opposite to the transparent substrate;
The thickness of the said 1st white decorating layer is 4 micrometers or less, The manufacturing method of the decorating member characterized by the above-mentioned.