JP7286943B2 - Decorative film and display device - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to a decorative film capable of displaying information by transmitting light projected from one side to the other side, and a display device including the decorative film.

2. Description of the Related Art In recent years, there has been proposed a technique of displaying a design such as a predetermined pattern or characters when a display device is not displaying.

For example, in Patent Document 1, in a display device having a display that is fitted into a mounting portion and emits display light to the outside when lit, the front surface of the display has a large number of fine holes through which the display light can pass. A display device is disclosed, which is covered with a screen, and the surface of the screen is set in the same color and pattern as the mounting portion around the display. Further, for example, Patent Document 2 discloses a light-emitting unit that presents information by controlling a light-emitting body, and a front panel unit that is arranged in front of the light-emitting unit and has a colored surface. In the electronic device, the colored surface of the front panel section has at least a range on which light from the light emitting section is projected from the colored section and a plurality of holes provided in the colored section. An electronic device is disclosed in which a light-transmitting portion for transmitting the light is formed in a predetermined pattern.

In such a display device, the film arranged in front of the display device displays a predetermined design, and the film is formed with a large number of holes, so that the film can be displayed at the time of display on the display device. Information on the display device can be displayed by transmitting light through the above-mentioned holes. Moreover, the design of the film can be visually recognized when the display device is not displaying.

Japanese Patent Application Laid-Open No. 2001-331132 JP 2012-83589 A

In the film arranged in front of the display device as described above, a large number of holes are usually formed by laser processing. However, laser processing has a problem that it takes a long time to form a large number of holes, resulting in a long tact time. Moreover, there is also the problem of cost.

The present disclosure has been made in view of the above problems, and when used in a display device, information of the display device can be displayed when the display device is displayed, and a predetermined design can be visually recognized when the display device is not displayed. The main object of the present invention is to provide a decorative film which can be manufactured in a short time at low cost.

The present disclosure relates to a decorative film that displays information by transmitting light projected from one surface side to the other surface side, comprising: a transparent substrate; Provided is a decorative film comprising: a decorative layer having patterned openings; and a patterned light-transmitting part disposed in the openings of the decorative layer, wherein the light-transmitting part has liquid repellency. do.

According to the present disclosure, the light-transmitting portion having liquid repellency is arranged in the opening of the decorative layer, and the light-transmitting portion has liquid repellency. It is possible to form a decorative layer having openings of Therefore, formation of openings by laser processing is unnecessary, and the decorative film can be manufactured in a short time at low cost. Furthermore, since the light-transmitting part has liquid repellency, the decorative layer can be formed in a simple process without requiring alignment when forming the decorative layer.

In the present disclosure, the translucent portion preferably contains a fluorine-based material or a silicone-based material, or contains fluorine. By containing a fluorine-based material or a silicone-based material, or by containing fluorine, the light-transmitting part can be a light-transmitting part with good liquid repellency.

The present disclosure relates to a decorative film that displays information by transmitting light projected from one surface side to the other surface side, comprising: a transparent substrate; A decorative layer having a patterned opening, and a patterned light-transmitting portion disposed in the opening of the decorating layer, the light-transmitting portion containing a fluorine-based material or a silicone-based material. Alternatively, a decorative film containing fluorine is provided.

The light-transmitting part in the present disclosure contains a fluorine-based material or a silicone-based material, or contains fluorine, so that it can have liquid repellency. According to the present disclosure, the light-transmitting portion is arranged in the opening of the decorative layer, and the light-transmitting portion has liquid repellency, so that a large number of openings can be easily formed by using the light-transmitting portion. A decorative layer can be formed. Therefore, formation of openings by laser processing is unnecessary, and the decorative film can be manufactured in a short time at low cost. Furthermore, since the light-transmitting part has liquid repellency, the decorative layer can be formed in a simple process without requiring alignment when forming the decorative layer.

In the present disclosure, it is preferable that the height of the translucent part from the transparent base material is equal to or less than the height of the decorative layer from the transparent base material. If the height of the light-transmitting part from the transparent base material is equal to or less than the height of the decorative layer from the transparent base material, the side surface of the light-transmitting part is not exposed. When projected, the total reflection on the side surface of the transparent portion can be suppressed, and the viewing angle characteristics of the decorative film can be improved.

In the present disclosure, a decorative film that displays information by transmitting light projected from the surface on the transparent substrate side to the surface opposite to the surface on the transparent substrate side, a light-shielding layer disposed between the material and the decorative layer and having openings in the same pattern as the openings of the decorative layer; It may be arranged in the opening of the decorative layer. By disposing the light-shielding layer between the transparent substrate and the decorative layer, when light is projected from the transparent substrate side of the decorative film, the light is prevented from passing through the decorative layer. It is possible to suppress deterioration in the visibility of information from the side of the decorative film opposite to the side facing the transparent base material.

The present disclosure further includes an intermediate layer disposed between the decorative layer and the light shielding layer and having openings in the same pattern as the openings of the decorating layer and the light shielding layer. , the light transmitting portion may be arranged in the opening of the light shielding layer, the opening of the intermediate layer, and the opening of the decorative layer. By arranging the intermediate layer between the decorative layer and the light shielding layer, when light is not projected from the transparent substrate side of the decorative film, the design of the decorative layer, such as the pattern and the letters, is visible. visibility can be improved.

In the present disclosure, a surface functional layer disposed so as to cover the decorative layer and the light-transmitting portion may be further provided on the surface of the decorative layer opposite to the surface facing the transparent substrate. . The surface functional layer can protect the surface of the decorative film. In addition, since the surface functional layer is arranged, when light is projected from the surface of the decorative film on the transparent base material side, the side surface of the light-transmitting portion in the portion where the light-transmitting portion protrudes from the decorative layer It is possible to make it difficult for total reflection to occur at , and the viewing angle characteristics of the decorative film can be improved.

In the present disclosure, a decorative film that displays information by transmitting light projected from a surface opposite to the transparent substrate side to the transparent substrate side, A light shielding layer may be further provided which is disposed on the surface of the layer opposite to the transparent substrate side and has openings in the same pattern as the openings of the decorative layer. Since the light shielding layer is arranged on the surface opposite to the transparent substrate side of the decorative layer, when light is projected from the surface opposite to the transparent substrate side of the decorative film, It is possible to suppress the transmission of the light through the decorative layer, and it is possible to suppress deterioration in the visibility of information from the transparent substrate side of the decorative film.

The present disclosure further includes an intermediate layer disposed between the decorative layer and the light shielding layer and having openings in the same pattern as the openings of the decorating layer and the light shielding layer. may be Since the intermediate layer is arranged between the decorative layer and the light-shielding layer, the pattern of the decorative layer is visible when light is not projected from the side of the decorative film opposite to the transparent base material side. The visibility of designs such as letters and letters can be improved.

In the present disclosure, a surface functional layer disposed so as to cover the light shielding layer and the translucent portion may be further provided on the surface of the light shielding layer opposite to the transparent substrate side. The surface functional layer can protect the surface of the decorative film.

In the present disclosure, the surface of the light-transmitting portion opposite to the surface facing the transparent substrate may have fine unevenness. Since the light-transmitting part has fine unevenness on the surface opposite to the transparent base material side, when light is projected from one side of the decorative film, the light transmitted through the light-transmitting part is reflected by the fine unevenness. It can be diffused and the viewing angle characteristics of the decorative film can be improved.

The present disclosure provides a display device comprising a display panel and the decorative film described above arranged in front of the display panel.

According to the present disclosure, by having the decorative film described above, it is possible to provide a display device that can display information on the display panel when displaying, and can visually recognize the design of the decorative film when not displaying. . Moreover, such a display device can be provided at a low cost.

The present disclosure is a decorative film that, when used in a display device, can display information of the display device when the display device is displayed, and can visually recognize a predetermined design when the display device is not displayed, There is an effect that it is possible to provide a decorative film that can be produced inexpensively in a short period of time.

1A and 1B are schematic plan views and cross-sectional views illustrating decorative films of the present disclosure; FIG. 1A and 1B are schematic plan views and cross-sectional views illustrating decorative films of the present disclosure; FIG. 1 is a schematic cross-sectional view illustrating a display device of the present disclosure; FIG. FIG. 2 is a process diagram illustrating a method for manufacturing the decorative film of the present disclosure; 1 is a schematic cross-sectional view illustrating a decorative film of the present disclosure; FIG. 1 is a schematic cross-sectional view illustrating a decorative film of the present disclosure; FIG. 1 is a schematic cross-sectional view illustrating a decorative film of the present disclosure; FIG. 1 is a schematic cross-sectional view illustrating a decorative film of the present disclosure; FIG. FIG. 4 is a process diagram illustrating a method for manufacturing the decorative film of the present disclosure; 1A and 1B are schematic plan views and cross-sectional views illustrating decorative films of the present disclosure; FIG. 1 is a schematic cross-sectional view illustrating a display device of the present disclosure; FIG. FIG. 2 is a process diagram illustrating a method for manufacturing the decorative film of the present disclosure; 1 is a schematic cross-sectional view illustrating a decorative film of the present disclosure; FIG. 1 is a schematic cross-sectional view illustrating a decorative film of the present disclosure; FIG. 1 is a schematic cross-sectional view illustrating a decorative film of the present disclosure; FIG. It is process drawing which illustrates the manufacturing method of the conventional decorative film.

The decorative film and display device of the present disclosure will be described below. However, the present disclosure can be embodied in many different forms and should not be construed as limited to the description of the embodiments exemplified below. In addition, in order to make the description clearer, the drawings may schematically show the width, thickness, shape, etc. of each member compared to the embodiment, but this is only an example, and the interpretation of the present disclosure is not limited to In addition, in this specification and each figure, the same reference numerals may be given to the same elements as those described above with respect to the existing figures, and detailed description thereof may be omitted as appropriate.

In this specification, when expressing a mode in which another member is arranged on top of a certain member, when simply describing “above” or “below”, unless otherwise specified, , arranging another member directly above or below, and arranging another member above or below a certain member via another member. In addition, in this specification, in expressing a mode in which another member is arranged on a certain member, unless otherwise specified, when simply described as “on the surface”, it means directly above or in contact with a certain member, unless otherwise specified. It includes both the case of arranging another member directly below and the case of arranging another member above or below a certain member via another member.

In this specification, the term "film" also includes members called "sheets" and the like.

A. Decorative Film The decorative film of the present disclosure has two embodiments. Each embodiment will be described below.

I. First embodiment A first embodiment of the decorative film of the present disclosure is a member that displays information by transmitting light projected from one surface side to the other surface side, comprising: a transparent base material; A decorative layer disposed on one surface of a transparent substrate and having a patterned opening, and a patterned light-transmitting portion disposed in the opening of the decorative layer, wherein the light-transmitting portion is It is a member having liquid repellency.

The decorative film of this embodiment has two aspects. A first aspect of the decorative film of the present embodiment is a decorative film that displays information by transmitting light projected from the surface on the transparent substrate side to the surface opposite to the surface on the transparent substrate side. be. In addition, the second aspect of the decorative film of the present embodiment is a decoration that displays information by transmitting light projected from the surface opposite to the surface on the transparent substrate side to the surface on the transparent substrate side. It's a film. Each embodiment will be described below.

1. First Aspect of First Embodiment In the first aspect of the first embodiment of the decorative film of the present disclosure, the light projected from the transparent substrate side is projected from the surface opposite to the transparent substrate side. A member that displays information by transmitting through a transparent base material, a decorative layer that is disposed on one surface of the transparent base material and has a patterned opening, and the opening of the decorative layer and a pattern-shaped light-transmitting portion arranged in a pattern, wherein the light-transmitting portion has liquid repellency.

The decorative film of this embodiment will be described below with reference to the drawings.
FIG. 1(a) is a schematic plan view showing an example of the decorative film of this embodiment, and FIG. 1(b) is a sectional view taken along line AA of FIG. 1(a). As illustrated in FIGS. 1A and 1B, the decorative film 1 includes a transparent substrate 2 and a decorative layer disposed on one side of the transparent substrate 2 and having patterned openings 13. 3 and a patterned translucent part 4 arranged in the opening 13 of the decorative layer 3 . The translucent part 4 has liquid repellency.

FIG. 2(a) is a schematic plan view showing another example of the decorative film of this embodiment, and FIG. 2(b) is a sectional view taken along line AA of FIG. 2(a). As illustrated in FIGS. 2A and 2B, the decorative film 1 includes a transparent substrate 2 and a decorative layer disposed on one side of the transparent substrate 2 and having patterned openings 13. 3 and a patterned translucent part 4 arranged in the opening 13 of the decorative layer 3 . The translucent part 4 has liquid repellency.

The decorative film of this embodiment is arranged between the transparent substrate 2 and the decorative layer 3, for example, as shown in FIG. A light shielding layer 5 having 15 may further be provided. In this case, the translucent part 4 is arranged in the opening 15 of the light shielding layer 5 and the opening 13 of the decorative layer 3 .

Further, the decorative film of this embodiment is arranged between the decorative layer 3 and the light shielding layer 5, for example, as shown in FIG. An intermediate layer 6 having the same pattern of openings 16 as 15 may further be provided. In this case, the translucent part 4 is arranged in the opening 15 of the light shielding layer 5 , the opening 16 of the intermediate layer 6 and the opening 13 of the decorative layer 3 .

FIG. 3 is a schematic cross-sectional view showing an example of a display device provided with the decorative film of the present disclosure, which is an example provided with the decorative film shown in FIGS. 2(a) and 2(b). As illustrated in FIG. 3, the display device 20 includes a display panel 21 and a decorative film 1 placed on the front surface of the display panel 21 with an adhesive layer 22 interposed therebetween.

The decorative film and the display panel may be adhered with an adhesive layer in this way, but for example, a support frame is provided to support the decorative film, and the decorative film is It may be arranged on the display panel. In this case, an air layer is formed between the display panel and the decorative film.
In order to arrange the decorative film on the display panel without using an adhesive layer in this way, it is preferable that the decorative film has self-supporting properties. is preferably arranged on one surface side of the

As shown in FIG. 2(b), the decorative film of this embodiment directs the light _L1 projected from the surface of the decorative film 1 on the transparent substrate 2 side to the transparent substrate 2 side of the decorative film 1. Information can be displayed through the surface opposite to the surface. Specifically, the light _L1 projected from the surface of the decorative film 1 on the transparent substrate 2 side is projected from the transparent portion 4 to the surface of the decorative film 1 opposite to the surface on the transparent substrate 2 side. Information can be displayed on the side of the decorative film 1 opposite to the side of the transparent base material 2 by transmitting the information to the transparent base material 2 side. Therefore, as shown in FIG. 3 , in the display device 20 including the decorative film 1 , when the display panel 21 displays, the viewer can see from the side of the decorative film 1 opposite to the side of the transparent substrate 2 . can visually recognize the image information of the display panel 21 through the transparent portion 4 of the decorative film 1 .

In addition, in the decorative film of this embodiment, as shown in FIG. 2B, when the light _L1 is not projected from the surface of the decorative film 1 on the transparent substrate 2 side, the transparent substrate 2 side Designs such as patterns and characters of the decorative layer 3 can be visually recognized from the surface side opposite to the surface of the decorative layer 3 . Therefore, as shown in FIG. 3, in the display device 20 including the decorative film 1, when the display panel 21 is not displaying, the observer can see from the side opposite to the side of the transparent substrate 2 of the decorative film 1. , the design of the decorative layer 3 can be visually recognized.

FIGS. 4(a) to 4(d) are process diagrams showing an example of the method for producing the decorative film of this embodiment, and are an example of the method for producing the decorative film shown in FIGS. 2(a) and 2(b). . First, as shown in FIG. 4A, a light shielding layer 5 is formed in a pattern on one surface of the transparent substrate 2 by a printing method or the like. As a result, the light shielding layer 5 having the patterned openings 15 is obtained. Subsequently, as shown in FIG. 4B, an intermediate layer 6 is formed on the light shielding layer 5 in the same pattern as that of the light shielding layer 5 by a printing method or the like. As a result, the intermediate layer 6 having the same pattern of openings 16 as the openings 15 of the light shielding layer 5 is obtained. Next, as shown in FIG. 4C, the light-transmitting portions 4 are formed in the openings 15 of the light-shielding layer 5 and the openings 16 of the intermediate layer 6 by printing or the like. Next, as shown in FIG. 4D, the decorative layer 3 is formed in a pattern on the intermediate layer 6 by a printing method or the like. As a result, the decorative layer 3 having the same patterned openings 13 as the openings 15 of the light shielding layer 5 and the openings 16 of the intermediate layer 6 is obtained.

In the manufacturing method of such a decorative film, as shown in FIG. Therefore, the decorative layer 3 can be easily formed in the region where the translucent portion 4 is not arranged. Therefore, it is possible to reliably form the decorative layer 3 only in the region where the light-transmitting portion 4 is not arranged, without requiring alignment of the decorative layer 3 . Therefore, for example, as shown in FIG. 5, when the decoration layer 3 has decoration portions 3a and 3b of a plurality of colors (in FIG. 5, the decoration layer 3 has decoration portions 3a and 3b of two colors. ) does not require alignment of the decorative portions 3 a and 3 b with respect to the opening 13 of the decorative layer 3 . 4D, when the decorative film 1 has the light shielding layer 5 and the intermediate layer 6, the opening 15 of the light shielding layer 5 and the opening 16 of the intermediate layer 6 are decorated. No layer 3 alignment is required.

Conventionally, the opening is usually formed by laser processing. For example, as shown in FIGS. After laminating 3 in order, an opening is formed by laser processing. Since the light-shielding layer, the intermediate layer, and the decorative layer usually have a large number of openings, it takes a long time to form the openings in laser processing, resulting in a long tact time. Also, it is costly.

A printing method can be used as a method for forming the decorative layer having openings. The printing method does not require the formation of openings by laser processing, and can form a decorative layer having a large number of openings in a short time and at low cost. Here, for example, when the decorative layer has decorative portions of a plurality of colors, it is necessary to align each decorative portion with respect to the opening of the decorative layer. Further, for example, when the decorative film has a light shielding layer and an intermediate layer, it is necessary to align the decorative layer with respect to the opening of the light shielding layer and the opening of the intermediate layer. However, printing methods are difficult to align.

In contrast, in this aspect, the light-transmitting portion is arranged in the opening of the decorative layer, and the light-transmitting portion has liquid repellency. It is possible to form a decorative layer having a large number of openings. Therefore, it is possible to manufacture the decorative film in a short time at low cost. In addition, since the light-transmitting portion has liquid repellency, the decorative layer can be formed in a simple process without requiring alignment when forming the decorative layer.

In addition, conventionally, as described above, the opening is usually formed by laser processing, and the thickness of the light shielding layer, the intermediate layer, and the decorative layer is comparable due to the ease and accuracy of forming the opening with laser processing. need to be thin. However, since the functions of the light shielding layer, the intermediate layer, and the decorative layer depend on the thickness of each layer, there is a limit to reducing the thickness of each layer.

On the other hand, in this aspect, since the light-transmitting portion is arranged in the opening of the decorative layer, and the light-transmitting portion has liquid repellency, it is not necessary to form the opening by laser processing. It is possible to increase the thickness of the light shielding layer, the intermediate layer and the decorative layer. Therefore, the light shielding layer, the intermediate layer, and the decorative layer can fully exhibit their respective functions.

The decorative film of this embodiment will be described in detail below.

(1) Light-Transmitting Part The light-transmitting part in this aspect is a pattern-shaped member that is arranged in an opening of the decorative layer, which will be described later. Further, as will be described later, when the decorative film of this embodiment has a light-shielding layer between the transparent substrate and the decorative layer, the light-transmitting portion is the opening of the light-shielding layer and the opening of the decorative layer. placed in Furthermore, as will be described later, when the decorative film of this embodiment has an intermediate layer between the decorative layer and the light-shielding layer, the light-transmitting portion includes the opening of the light-shielding layer, the opening of the intermediate layer, and the opening of the light-shielding layer. It is placed in the opening of the decorative layer.

The translucent part has liquid repellency. Specifically, the translucent part has liquid repellency with respect to the decorative layer composition used to form the decorative layer. Further, when the light-shielding layer and the decorative layer are laminated in order on one surface of the transparent base material, and as described later, when the light-shielding layer forming step is performed after the light-transmitting portion forming step, the light-transmitting The part preferably has liquid repellency also with respect to the light shielding layer composition used for forming the light shielding layer. Further, in the case where the light shielding layer, the intermediate layer and the decorative layer are laminated in order on one surface of the transparent substrate, as described later, the light shielding layer forming step and the intermediate layer forming step are performed after the translucent portion forming step. In the case of performing, the light-transmitting part has liquid repellency with respect to the light-shielding layer composition used for forming the light-shielding layer, and has liquid repellency with respect to the intermediate layer composition used for forming the intermediate layer It is preferable that the liquid repellency is also present.

The liquid repellency of the light-transmitting portion is appropriately selected according to the type of the decorative layer composition, and the contact angle between the surface of the light-transmitting portion and the decorative layer composition is It is sufficient if the contact angle with the decorative layer composition on the surface of the area where it is not arranged is higher. The surface of the area where the light-transmitting part is not arranged means the surface of the transparent base material in the area where the light-transmitting part is not arranged when the decorative layer is arranged directly above the transparent base material. In the case where the light shielding layer and the decorative layer are arranged in order on one surface of the transparent base material, the surface of the light shielding layer in the area where the light transmitting portion is not arranged, and the one surface of the transparent base material. When the light-shielding layer, the intermediate layer and the decorative layer are arranged in this order, it refers to the surface of the intermediate layer in the region where the translucent portion is not arranged.

Specifically, the contact angle of pure water on the surface of the transparent portion is preferably 95° or more, more preferably 112° or more, and particularly preferably 114° or more. Further, the contact angle of the light-transmitting portion surface to n-hexadecane is preferably 50° or more, more preferably 55° or more, and particularly preferably 60° or more.
Since the contact angle of the surface of the light-transmitting portion is within the above range, the liquid repellency of the light-transmitting portion can be used to eliminate the need for alignment when forming the decorative layer, and the region where the light-transmitting portion is not arranged. The decorative layer can be reliably formed only on the surface.

The contact angle is measured by a method according to JIS R3257.

The translucent part has transparency. The transparency of the light-transmitting portion is preferably such that when light is projected onto the decorative film of this embodiment, the light can pass through the light-transmitting portion. Specifically, the total light transmittance of the translucent portion is preferably 80% or more, particularly preferably 90% or more. Since the total light transmittance of the light-transmitting part is within the above range, when light is projected onto the decorative film from one surface side, more light can be emitted to the other surface side. Visibility of information displayed by light is improved.

The total light transmittance of the translucent portion can be measured, for example, by a method conforming to JIS K7361-1:1997.

Moreover, the translucent part may be any material as long as it has transparency, and may be colorless or colored. Among them, the translucent part is preferably colorless. This is because it is possible to suppress the light projected from the surface of the decorative film on the transparent base material side from being colored by the decorative layer.

Examples of the method of imparting liquid repellency to the light transmitting portion include a method of incorporating a liquid repellent material into the light transmitting portion and a method of subjecting the light transmitting portion to a liquid repellent treatment.

When the light-transmitting portion contains a liquid-repellent material, the liquid-repellent material may be any material as long as the light-transmitting portion having the liquid repellency described above can be obtained, and examples thereof include fluorine-based materials and silicone-based materials. . The liquid-repellent material can be used singly or in combination of two or more.

Examples of fluorine-based materials include fluororesins and fluorine-based surfactants. Known fluororesins and fluorosurfactants can be used.

Examples of silicone-based materials include silicone resins, silicone oils, and silicone-based surfactants. Known silicone resins, silicone oils, and silicone surfactants can be used.

It should be noted that, for example, time-of-flight secondary ion mass spectrometry (TOF-SIMS) can be used to confirm that the light-transmitting portion contains a fluorine-based material or a silicone material.

The content of the liquid-repellent material in the light-transmitting portion is appropriately adjusted according to the composition of the material of the light-transmitting portion, the type of the liquid-repellent material, and the like. The content of the liquid-repellent material in the light-transmitting portion can be, for example, 0.1% by mass or more and 100% by mass or less, preferably 0.5% by mass or more and 50% by mass or less. It is preferable that it is more than mass % and less than 20 mass %. If the content of the liquid-repellent material in the light-transmitting portion is too small, there is a risk that sufficient liquid repellency cannot be obtained.

Also, the translucent part can contain the liquid-repellent material and the transparent resin. The transparent resin may be any resin having optical transparency. Specifically, polyethylene terephthalate, polyethylene naphthalate, polycarbonate, methyl methacrylate/styrene resin, methyl methacrylate/butadiene/styrene resin, acrylic resin, A triacetyl cellulose resin etc. are mentioned.

In addition, the translucent part may contain one or more of various additives such as a cross-linking agent, an ultraviolet absorber, an antioxidant, an antistatic agent, a flame retardant, and a plasticizer, if necessary. .

When the light-transmitting portion is subjected to the liquid-repellent treatment, the liquid-repellent treatment is a method for obtaining the above-described light-transmitting portion having the liquid-repellent property, and only the surface of the light-transmitting portion can be made liquid-repellent. The method is not particularly limited as long as it can suppress the liquid repellency of the surface of the region where the light-transmitting portion is not arranged.

Examples of the lyophobic treatment using a fluorine compound as an introduced gas include fluorine plasma treatment in which plasma is applied using a fluorine compound as an introduced gas. Fluorine compounds used as the introduced gas include, for example, CF ₄ , NF ₃ , SF ₆ , CHF ₃ , C ₂ F ₆ , C ₃ F ₈ and C ₅ F ₈ . Also, the introduced gas may be a mixture of a fluorine compound and another gas. Other gases include, for example, nitrogen, oxygen, argon, and helium.

The plasma irradiation method is not particularly limited as long as it can make the surface of the light-transmitting portion liquid-repellent. For example, the plasma irradiation may be performed under reduced pressure or under atmospheric pressure. . Atmospheric pressure plasma is advantageous in terms of cost, manufacturing efficiency, and the like.

In the case where the light-transmitting portion is treated to be liquid-repellent, the surface of the light-transmitting portion contains fluorine. The presence of fluorine on the surface of the light-transmitting portion can be confirmed by, for example, X-ray photoelectron spectroscopy (XPS) by measuring the proportion of elemental fluorine in all elements detected from the surface of the light-transmitting portion. .

When the light-transmitting portion is subjected to liquid-repellent treatment, the material of the light-transmitting portion may be a material capable of the liquid-repellent treatment. Materials that can be subjected to the liquid-repellent treatment are not particularly limited as long as the light-transmitting portion having the above-described liquid-repellency can be obtained after the liquid-repellent treatment. Examples include organopolysiloxane, polyvinyl alcohol, polycarbonate, and polychloride. Examples include polymeric materials such as vinyl, polystyrene, polyamide, polyimide, epoxy resin, and phenol resin.

The thickness of the light-transmitting portion may be such that the height of the light-transmitting portion from the transparent substrate is equal to or greater than the height of the surface of the decorative layer facing the transparent substrate from the transparent substrate. 4 may be lower than the height h2 of the decorative layer 3 from the transparent substrate 2, as shown in FIG. 6, for example, as shown in FIG. 2(b). As shown in FIG. 5, the height h2 of the decorative layer 3 from the transparent base material 2 may be the same as the height h2 of the decorative layer 3 from the transparent base material 2. For example, as shown in FIG. may For example, in FIGS. 2B, 5 and 6, the height h1 of the translucent portion 4 from the transparent base material 2 is is greater than or equal to the height h0.

Above all, it is preferable that the height of the translucent part from the transparent base material is equal to or less than the height of the decorative layer from the transparent base material. For example, when the height of the light-transmitting part from the transparent base material is higher than the height of the decorative layer from the transparent base material, the light-transmitting part is exposed at the part where the light-transmitting part protrudes from the decoration layer. In this case, when light is projected from the surface of the decorative film on the transparent base material side, the light transmitted through the light-transmitting portion has a large refractive index difference between the light-transmitting portion and air on the exposed surface of the light-transmitting portion. Facilitates total reflection. In particular, when the side surface of the light-transmitting part is exposed at the part where the light-transmitting part protrudes from the decorative layer, total reflection tends to occur on the exposed surface of the side surface of the light-transmitting part, and the visibility decreases depending on the viewing angle. There is a risk of On the other hand, when the height of the light-transmitting portion from the transparent base material is equal to or less than the height of the decorative layer from the transparent base material, the side surface of the light-transmitting portion is not exposed. can be suppressed, and the viewing angle characteristics can be improved.

Further, when the height of the translucent part from the transparent base material is higher than the height of the decorative layer from the transparent base material, the height of the translucent part from the transparent base material and the height of the decorative layer from the transparent base material can be 50 μm or less, preferably 20 μm or less, particularly preferably 5 μm or less. This is because if the height difference is too large, it may become difficult to form the decorative layer.

Here, the height of the translucent part from the transparent substrate refers to the height of the translucent part from one surface of the transparent substrate, and refers to the thickness of the translucent part. For example, in FIG. 2(b), FIG. 5 and FIG. 6, it is the height indicated by symbol h1.

The height of the surface of the decorative layer on the transparent substrate side from the transparent substrate refers to the height from one surface of the transparent substrate to the surface of the decorative layer on the transparent substrate side. For example, when the decorative layer is arranged directly above the transparent base material, the height of the surface of the decorative layer facing the transparent base material from the transparent base material is zero. Further, for example, when the light shielding layer and the intermediate layer are arranged between the transparent substrate and the decorative layer, the height of the transparent substrate side surface of the decorative layer from the transparent substrate is the same as that of the intermediate layer. is the height from the transparent base material, and is the total thickness of the light shielding layer and the intermediate layer. For example, in FIG. 2(b), FIG. 5 and FIG. 6, it is the height indicated by symbol h0.

Further, the height of the decorative layer from the transparent substrate refers to the height of the decorative layer from one surface of the transparent substrate. For example, when the decorative layer is arranged directly above the transparent substrate, the height of the decorative layer from the transparent substrate refers to the thickness of the decorative layer. Further, for example, when the light shielding layer and the intermediate layer are arranged between the transparent base material and the decorative layer, the height of the decorative layer from the transparent base material means the light shielding layer, the intermediate layer and the decorative layer. refers to the total thickness of Specifically, it is the height indicated by symbol h2 in FIGS.

The thickness of the light-transmitting portion, that is, the height of the light-transmitting portion from the transparent base material is appropriately adjusted according to the aspect of the above-described height of the light-transmitting portion from the transparent base material. Specifically, the thickness of the translucent portion can be 0.05 μm or more and 100 μm or less, preferably 0.1 μm or more and 50 μm or less, and particularly preferably 0.2 μm or more and 25 μm or less. When the thickness of the light-transmitting portion is within the above range, the decorative layer can be reliably formed only in the region where the light-transmitting portion is not arranged without requiring alignment when forming the decorative layer.

The pattern shape of the translucent part is such that when light is projected from the side of the decorative film facing the transparent base material, the light is sufficiently transmitted to the side opposite to the side of the decorative film facing the transparent base material. There is no particular limitation as long as the pattern shape is capable of exhibiting the function of Examples of the pattern shape of the translucent portion include dots, stripes, grids, checkered patterns, and the like.

The shape of the translucent part in plan view is such that when light is projected from the surface of the decorative film facing the transparent substrate, the light is sufficiently directed to the surface opposite to the surface of the decorative film facing the transparent substrate. It is not particularly limited as long as it has a shape that can exhibit the function of transmitting. Examples of the planar shape of the translucent portion include a circular shape, an elliptical shape, and a rectangular shape. Also, the decorative film usually has a large number of translucent portions. The plane view shape of a large number of translucent parts may be the same or may be different.

The size of the light-transmitting portion in a plan view is preferably a size that satisfies the aperture ratio of the decorative layer, which will be described later. Also, the interval between the adjacent light-transmitting portions can be appropriately adjusted according to the size of the light-transmitting portion, etc., but is preferably set so as to satisfy the aperture ratio of the decorative layer. The interval between adjacent light-transmitting portions refers to the distance indicated by symbol d in FIGS. 1(a) and 2(a), for example.

For example, when the pattern shape of the light-transmitting portion is dot-shaped and the planar view shape of the light-transmitting portion is circular, the size of the light-transmitting portion is specifically 5 μm in diameter. 500 μm or less, preferably 20 μm or more and 400 μm or less, and particularly preferably 50 μm or more and 300 μm or less.

In this case, the distance between the adjacent light-transmitting portions can be specifically 5 μm or more and 1000 μm or less, preferably 20 μm or more and 600 μm or less, and particularly preferably 50 μm or more and 500 μm or less. . When the diameter of the light-transmitting portion and the distance between the adjacent light-transmitting portions are within the above range, the light-transmitting portion is visually recognized by the observer, and the visibility of the design such as the pattern and characters of the decorative layer is prevented from deteriorating. can be suppressed.

Furthermore, in this case, the ratio of the thickness of the light-transmitting portion to the diameter of the light-transmitting portion (thickness/diameter) can be, for example, 0.05/500 or more and 100/5 or less, especially 0.1/500 or more and 100 /40 or less, and more preferably 0.2/500 or more and 100/100 or less. When the above ratio is within the above range, the strength of the light-transmitting portion can be increased, and the decoration layer having the opening can be stably formed using the light-transmitting portion.

Further, for example, when the pattern shape of the light-transmitting portion is a lattice shape, specifically, the width of the light-transmitting portion can be 5 μm or more and 500 μm or less, especially 20 μm or more. It is preferably 400 μm or less, and particularly preferably 50 μm or more and 300 μm or less. Further, in this case, the interval between the adjacent light-transmitting portions can be specifically 5 μm or more and 1000 μm or less, preferably 20 μm or more and 600 μm or less, and particularly 50 μm or more and 500 μm or less. preferable. When the width of the light-transmitting portion and the interval between adjacent light-transmitting portions are within the above range, the light-transmitting portion is visually recognized by an observer, and the visibility of designs such as patterns and characters of the decorative layer is prevented from deteriorating. can be suppressed.

Furthermore, in this case, the ratio of the thickness of the light transmitting portion to the width of the light transmitting portion (thickness/width) can be, for example, 0.5/500 or more and 40/5 or less, especially 5/500 or more and 100/40. It is preferably less than or equal to, particularly preferably 10/500 or more and 100/100 or less. When the above ratio is within the above range, the strength of the light-transmitting portion can be increased, and the decoration layer having the opening can be stably formed using the light-transmitting portion.

Further, for example, when the pattern shape of the light-transmitting portion is a stripe shape, specifically, the width of the light-transmitting portion can be 5 μm or more and 500 μm or less, especially 20 μm or more. It is preferably 400 μm or less, and particularly preferably 50 μm or more and 300 μm or less. In this case, the distance between the adjacent light-transmitting portions can be specifically 5 μm or more and 1000 μm or less, preferably 20 μm or more and 600 μm or less, and particularly preferably 50 μm or more and 500 μm or less. . When the width of the light-transmitting portion and the interval between adjacent light-transmitting portions are within the above range, the light-transmitting portion is visually recognized by an observer, and the visibility of designs such as patterns and characters of the decorative layer is prevented from deteriorating. can be suppressed.

Furthermore, in this case, the ratio of the thickness of the light-transmitting portion to the width of the light-transmitting portion (thickness/width) can be, for example, 0.5/500 or more and 40/5 or less, especially 5/500 or more and 40/40. It is preferably less than or equal to, particularly preferably 10/500 or more and 40/100 or less. When the above ratio is within the above range, the strength of the light-transmitting portion can be increased, and the decoration layer having the opening can be stably formed using the light-transmitting portion.

For example, as shown in FIG. 7, the light-transmitting portion 4 may have fine unevenness 4c on the surface opposite to the transparent substrate 2-side surface of the light-transmitting portion 4 . Since the light-transmitting part 4 has the fine unevenness 4c on the surface, when the light _L1 is projected from the surface of the decorative film 1 on the transparent substrate 2 side, the light transmitted through the light-transmitting part 4 by the fine unevenness 4c. This is because _L1 can be diffused and the viewing angle characteristics of the decorative film can be improved.

When the light-transmitting portion has fine unevenness on the surface, the surface roughness of the surface of the light-transmitting portion opposite to the transparent substrate side should be such that the light passing through the transmitting portion can be diffused. Just do it. Specifically, the arithmetic mean roughness Ra of the surface of the light-transmitting portion opposite to the surface facing the transparent substrate is preferably 10 nm or more and 20000 nm or less, more preferably 200 nm or more and 10000 nm or less. In particular, it is preferably 500 nm or more and 800 nm or less. This is because when the arithmetic mean roughness Ra is within the above range, the light-transmitting portion can exhibit a desired light diffusing function, and the viewing angle characteristics of the decorative film can be improved.

In addition, arithmetic mean roughness Ra can be measured by the method based on JISB0601, for example.

The translucent part may or may not have a light diffusing function, but preferably does not have a light diffusing function. Since the light-transmitting portion does not have a light diffusion function, the transparency of the light-transmitting portion, for example, the total light transmittance of the light-transmitting portion can be increased. As a result, image information can be clearly displayed when light is projected from the surface of the decorative film on the transparent substrate side, and designs such as patterns and characters of the decorative layer are made more difficult to see. be able to.

Moreover, it is preferable that the translucent part does not substantially contain a particulate light diffusing material. Since the light-transmitting part does not substantially contain the particulate light-diffusing material, the light-transmitting part can be made to have no light-diffusing function.

Note that the particulate light diffusing material includes, for example, light diffusing materials having shapes such as a spherical shape, a flat shape, an irregular shape, a star shape, and a confetti shape.

Further, the fact that the light-transmitting part does not substantially contain the particulate light-diffusing material means that the content of the particulate light-diffusing material in the light-transmitting part is 5% by mass or less. The content of the particulate light diffusing material in the translucent part is preferably 1% by mass or less, particularly preferably 0% by mass.

Further, the haze value of the translucent portion is preferably, for example, 10% or less, more preferably 8% or less, and particularly preferably 5% or less. When the haze value of the translucent part is within the above range, the translucent part can be made to have no light diffusing function.

The haze value of the transmission portion can be measured according to JIS K7136:2000, for example.

(2) Decorative layer The decorative layer in this aspect is a member that is disposed on one surface of the transparent substrate and has patterned openings. In this aspect, as described above, when light is not projected from the surface of the decorative film on the transparent substrate side, the decorative layer is formed from the surface opposite to the surface of the decorative film on the transparent substrate side. Designs such as patterns and letters can be visually recognized.

The decorative layer usually has a large number of openings in plan view, as shown in FIGS. 1(a) and 2(a), for example. Since the decorative layer has a large number of openings, when light is projected from the surface of the decorative film on the transparent substrate side, light is projected from the openings in the direction opposite to the surface of the decorative film on the transparent substrate side. It becomes possible to transmit light to the surface side. As a result, the observer can visually recognize the predetermined information by the light transmitted through the side of the decorative film opposite to the side of the transparent base material.

The aperture ratio of the decorative layer is such that when light is projected from the surface of the decorative film on the transparent substrate side, the light is transmitted to the surface of the decorative film opposite to the transparent substrate side. , the transparent substrate of the decorative film when the aperture ratio is such that the observer can sufficiently visually recognize the information and the light is not projected from the surface side of the decorative film on the transparent substrate side It is preferable that the aperture ratio is such that an observer can sufficiently visually recognize the designs such as patterns and characters of the decorative layer from the surface opposite to the side surface. Therefore, the aperture ratio of the decorative layer can be appropriately adjusted according to the use of the decorative film. Specifically, the aperture ratio of the decorative layer is preferably 5% or more, more preferably 10% or more and 40% or less, and particularly preferably 20% or more and 30% or less. The opening ratio of the decorative layer is the ratio of the area of the opening of the decorative layer to the total area of the opening and the area other than the opening of the decorative layer.

The pattern shape of the openings of the decorative layer, the planar view shape of the openings, the planar view size of the openings, and the interval between adjacent openings are the pattern shape of the light-transmitting portions described above, and the planar view of the light-transmitting portions. The shape, the size of the light-transmitting portion in plan view, and the distance between the adjacent light-transmitting portions may be the same.

Designs such as patterns and characters of the decorative layer are not particularly limited, and can be appropriately selected according to the use of the decorative film of this embodiment.

The decorative layer may be a single layer or multiple layers. Moreover, the decorative layer may have a decorative portion of a plurality of colors. Each decorative portion may partially or wholly overlap with each other.

The decorative layer may have light shielding properties. Since the decorative layer has a light-shielding property, it can also serve as a light-shielding layer, which will be described later. The light shielding property of the decorative layer can be the same as that of the light shielding layer. For example, by increasing the thickness of the decorative layer, it is possible to obtain a decorative layer having a light blocking effect.

The material of the decorative layer is not particularly limited as long as it can be decorated. In this aspect, a printing method is usually used for forming the decorative layer. Therefore, the material of the decorative layer is preferably a material that can be applied to the printing method. Examples of such materials include resin compositions containing coloring agents and resins. Examples of coloring materials include dyes and pigments. As the resin, any material can be used as long as it can disperse the coloring material. For example, a resin generally used for printing ink can be used.

The decorative layer can appropriately contain additives such as fillers, plasticizers, dispersants, lubricants, antistatic agents, antioxidants and anti-mold agents, if necessary.

The thickness of the decorative layer can be appropriately adjusted according to the design of the decorative layer, the application and size of the decorative film, and the like. The thickness of the decorative layer can be, for example, 0.01 μm or more and 20 μm or less, preferably 0.05 μm or more and 10 μm or less.

(3) Light-shielding layer The decorative film of this embodiment further includes a light-shielding layer disposed between the transparent substrate and the decorative layer described later and having openings in the same pattern as the openings of the decorative layer. It is preferable to have The light shielding layer can block light projected onto the decorative film. For example, as shown in FIG. 2B, the light shielding layer 5 suppresses the transmission of the light _L1 projected from the transparent base 2 side of the decorative film 1 through the decorative layer 3. be able to. By preventing the light _L1 projected from the surface of the decorative film 1 on the side of the transparent substrate 2 from passing through the decorative layer 3, it is possible to suppress the light _L1 from being colored by the decorative layer 3. . As a result, it is possible to suppress deterioration in the visibility of information for an observer from the side of the decorative film 1 opposite to the side of the transparent substrate 2 .

The light shielding layer has openings in the same pattern as the openings of the decorative layer. The aperture and aperture ratio of the light shielding layer can be the same as those of the decorative layer.

The light shielding layer has a light shielding property. Specific light-shielding properties of the light-shielding layer vary depending on the application of the decorative film. It is preferably 25% or less.

The total light transmittance of the light shielding layer can be measured, for example, by a method conforming to JIS K7361-1:1997.

Moreover, the light shielding property of the light shielding layer varies according to the wavelength of the light projected onto the decorative film. Therefore, the light shielding property of the light shielding layer can be defined by, for example, the spectral transmittance. The numerical range defined by the spectral transmittance can be the same as the numerical range of the total light transmittance. The spectral transmittance can be measured using, for example, V-7100 UV-visible spectrophotometer manufactured by JASCO Corporation. In addition to the spectral transmittance, the light shielding property can be defined by the Y value and the L ^* value. The Y value and L ^* value can be calculated from the spectral transmittance, and can be measured using, for example, a Konica Minolta CS-100A color luminance meter. Note that the method of calculating the Y value and the L ^* value from the spectral transmittance can be the same as the method of calculating from a known formula, so the explanation here is omitted.

The material of the light-shielding layer is not particularly limited as long as it is a material capable of exhibiting desired light-shielding properties, and examples thereof include a resin composition containing a light absorbing material or a coloring material and a resin. Examples of the light absorbing material include carbon black, graphite, metal salts such as black iron oxide, and the like. Examples of the coloring material include dark dyes and pigments such as gray and black. Furthermore, as the resin, any material can be used as long as it can disperse the light absorbing material and the coloring material. For example, a resin generally used for printing ink can be used.

The thickness of the light-shielding layer is not particularly limited as long as it is thick enough to exhibit the desired light-shielding function. When the thickness of the light shielding layer is within the above range, a desired light shielding function can be exhibited.

Moreover, the decorative film of this aspect may have an alignment mark containing the same material as the light shielding layer on one surface of the transparent substrate. As will be described later, when the light-transmitting portion forming step is performed after the light-shielding layer forming step, an alignment mark is formed simultaneously with the light-shielding layer in the light-shielding layer forming step, so that the alignment mark is used in the light-transmitting portion forming step. can be used to align the light-transmitting portion with respect to the light-shielding layer. Further, when the decorative film of this embodiment has an intermediate layer, which will be described later, the alignment mark is formed at the same time as the light shielding layer in the light shielding layer forming step. Alignment of the intermediate layer with respect to the light shielding layer can be performed.

(4) Intermediate layer The decorative film of this embodiment is disposed between the decorative layer and the light shielding layer, and has openings in the same pattern as the openings of the decorative layer and the light shielding layer. It may further comprise an intermediate layer having By disposing the intermediate layer between the decorative layer and the light shielding layer, when light is not projected from the surface of the decorative film on the transparent substrate side, the area behind the decorative layer is brightened, Designs such as patterns and letters on the decorative layer can be enhanced. In addition, it is possible to prevent the light shielding layer from being seen through the decorative layer. Thereby, the visibility of designs such as patterns and characters on the decorative layer can be improved.

Above all, for example, when the design of the decorative layer, such as a pattern or letters, has a light color, it is preferable to arrange an intermediate layer between the decorative layer and the light-shielding layer. When the design of the decorative layer is light in color, the back of the decorative layer becomes dark when light is not projected from the surface of the decorative film on the transparent substrate side. is likely to be seen through, the design of the decorative layer may appear dark to an observer. On the other hand, by arranging the intermediate layer between the decorative layer and the light shielding layer, the background of the decorative layer can be brightened and the light shielding layer can be prevented from being seen through the decorative layer. As a result, the design of the decorative layer can be highlighted, and the visibility of the design of the decorative layer can be enhanced. In order to prevent the light shielding layer from being seen through the decorative layer, it is necessary to increase the thickness of the decorative layer. tend to be thicker. In such a case, by providing the intermediate layer, it is possible to prevent the light shielding layer from being seen through the decoration layer without increasing the thickness of the decoration layer.

The intermediate layer can brighten the area behind the decorative layer when light is not projected from the surface of the decorative film on the transparent substrate side, and also prevents the light shielding layer from being seen through the decorative layer. It is not particularly limited as long as it is a layer capable of suppressing it, and for example, a colored layer can be used. The colored layer can be appropriately selected according to the design color of the decorative layer. Specifically, a white layer can be used.

The intermediate layer has openings in the same pattern as the openings of the decorative layer and the light shielding layer. The aperture and aperture ratio of the intermediate layer can be the same as those of the decorative layer.

As for the material of the intermediate layer, when light is not projected from the surface of the decorative film on the transparent substrate side, the area behind the decorative layer can be brightened, and the light shielding layer can be seen through the decorative layer. It is preferred that the material be such that it can be suppressed from being seen. Materials for the intermediate layer include, for example, a resin composition containing a coloring agent and a resin. The color tone of the coloring material used in the intermediate layer can be appropriately selected according to the color tone of the design of the decorative layer. A well-known coloring material can be used as a specific coloring material. As the resin, any material can be used as long as it can disperse the coloring material. For example, a resin generally used for printing ink can be used.

The thickness of the intermediate layer makes it possible to brighten the area behind the decorative layer when light is not projected from the transparent substrate side of the decorative film, and the light shielding layer can be seen through the decorative layer. The thickness is not particularly limited as long as the thickness is such that it is possible to suppress , and the thickness can be appropriately adjusted according to the color tone of the decorative layer and the intermediate layer. The thickness of the intermediate layer may be, for example, 0.1 μm or more and 30 μm or less, preferably 3 μm or more and 15 μm or less.

(5) Surface functional layer In the decorative film of this embodiment, for example, as shown in FIG. may further include a surface functional layer 7 arranged to cover the . In this embodiment, for example, as shown in FIG. 8, the surface functional layer 7 can be arranged as the outermost layer on the surface of the decorative film 1 opposite to the transparent substrate 2 side.

It is preferable that the difference between the refractive index of the surface functional layer and the refractive index of the light-transmitting portion is relatively small. Specifically, the difference between the refractive index of the surface functional layer and the refractive index of the translucent portion is preferably 0.2 or less, more preferably 0.1 or less, particularly 0.05 or less. is preferred.

For example, when the surface functional layer is not arranged and the light-transmitting part is exposed at the part where the light-transmitting part protrudes from the decorative layer, the light is projected from the transparent substrate side of the decorative film. Then, the light transmitted through the light-transmitting portion is likely to be totally reflected on the exposed surface of the light-transmitting portion due to the large difference in refractive index between the light-transmitting portion and the air. In particular, when the side surface of the light-transmitting part is exposed at the part where the light-transmitting part protrudes from the decorative layer, total reflection tends to occur on the exposed surface of the side surface of the light-transmitting part, and the visibility decreases depending on the viewing angle. There is a risk of On the other hand, when the difference in refractive index is within the above range, the difference in refractive index between the light-transmitting portion and the surface functional layer is small. , total reflection can be made difficult to occur, and viewing angle characteristics can be improved. Any of the refractive indices of the surface functional layer and the light-transmitting portion may be high or low as long as the difference between the refractive index of the surface functional layer and the light-transmitting portion is within the above range. .

In addition, the refractive index of the surface functional layer and the light-transmitting portion can be measured by a method based on JIS K 7142, for example. Specifically, it can be measured using an Abbe refractometer at a temperature of 25° C. using a sodium light source with a measurement wavelength of 589 nm.

The function of the surface functional layer includes, for example, at least one function such as a hard coat function, an antiglare function, an antireflection function, an antistatic function, an ultraviolet absorption function, and an antifouling function. Among them, the surface functional layer is preferably a surface protective layer having a hard coat function.

The surface protective layer preferably has a predetermined hardness. The hardness of the surface protective layer is preferably, for example, "HB" or higher in a pencil hardness test defined by JIS K 600-5-4 (1994). This is because the surface protective layer can exhibit the desired hard coat function.

The material for the surface protective layer is preferably, for example, a material that exhibits a desired hard coat function and can protect the decorative film of this embodiment. The material of the surface protective layer preferably contains, for example, an ionizing radiation-curable resin or a thermosetting resin. Here, the ionizing radiation-curable resin refers to a resin containing at least an ionizing radiation-curable resin monomer, an ionizing radiation-curable resin oligomer, or a mixture thereof.

Moreover, when imparting other functions to the surface protective layer, the surface protective layer can contain additives as appropriate.

The thickness of the surface protective layer is not particularly limited, for example, as long as it is thick enough to exhibit the desired hard coat function, and can be appropriately adjusted according to the intended use of the decorative film of this embodiment. The thickness of the surface protective layer can be, for example, 1 μm or more and 50 μm or less.

(6) Transparent Base Material The transparent base material in this embodiment is a member that supports the above-described translucent portion, decorative layer, light shielding layer, intermediate layer, surface functional layer, and the like. When the decorative film of this embodiment is used in a display device, a display panel is arranged on the side of the decorative film facing the transparent substrate.

It is preferable that the transparent base material has a transparency that does not hinder the transmission of light when light is projected onto the decorative film. As a specific transparency of the transparent substrate, for example, the total light transmittance is preferably 80% or more, and more preferably 90% or more. The total light transmittance of the transparent substrate can be measured, for example, by a method conforming to JIS K7361-1:1997.

The material of the transparent substrate may be any material having a predetermined total light transmittance as described above. Examples include polyethylene terephthalate, polycarbonate, acrylic resin, cycloolefin resin, polyester, polystyrene, acrylic styrene resin, and acrylonitrile. - Resin such as butadiene-styrene (ABS) resin, and glass such as quartz glass, Pyrex (registered trademark), and synthetic quartz.

Moreover, the transparent base material may contain an ultraviolet absorber, a heat ray absorber, etc. as needed.

The thickness of the transparent substrate is not particularly limited as long as it is thick enough to support the translucent portion, the decorative layer, the light shielding layer, the intermediate layer, the surface functional layer, etc., and is, for example, 0.01 mm or more. It can be 4.0 mm or less, preferably 0.1 mm or more and 1.0 mm or less.

(7) Support member The decorative film of this embodiment may have a support member arranged on either side of the decorative film. Since the decorative film has a relatively thin film thickness, it does not have self-supporting properties. For example, when it is arranged in front of the display panel to form a display device, it is arranged using a support frame as described above. etc. may cause problems. Further, since the decorative film is formed flat, it is difficult to form a curved surface. In such a case, by arranging the supporting member on either side of the decorative film, it becomes possible to impart self-supporting properties. By molding or the like, it is possible to obtain a decorative film having a predetermined external shape.

A material for forming such a support member is not particularly limited as long as it is transparent, and examples thereof include thermoplastic resins such as polycarbonate resin, ABS resin, and alkyl resin, glass, and the like. The film thickness of such a support member is usually about 2 mm to 5 mm.

The support member and the decorative film may be adhered using an adhesive, and when a thermoplastic resin is used as the material for the support member, the insert molding method, the in-mold molding method, and the TOM molding method ( The decorative film may be adhered at the same time as the supporting member is molded using the Three dimensional Overlay Method (three-dimensional surface coating method). In this case, it is preferable to dispose an adhesion layer made of ABS resin or the like on the decorative film side.
As described above, the support member may be formed on the transparent substrate side of the decorative film, may be formed on the decorative layer side, or may be formed on both sides. placed in

(8) Physical properties of decorative film The decorative film of this embodiment preferably has a predetermined transparency. As for the transparency of the decorative film, for example, the total light transmittance is preferably 60% or more, more preferably 80% or more, and particularly preferably 90% or more. Since the total light transmittance of the decorative film is within the above range, image information can be clearly displayed when light is projected from the transparent substrate side of the decorative film, and the decorative layer It is possible to make it more difficult to visually recognize designs such as patterns and characters.

Also, the decorative film may have a supporting member as described above, and in this case, the supporting member is molded together with the decorative member by an insert molding method, an in-mold molding method, a TOM molding method, or the like. When such a molding method is used, the decorative film preferably has properties such as thermoplasticity, stretchability, and excellent moldability.

The total light transmittance of the decorative film can be measured, for example, by a method conforming to JIS K7361-1:1997.

(9) Method for producing decorative film The method for producing the decorative film of this embodiment may be any method as long as it is a method capable of obtaining a decorative film having the above-described predetermined configuration. Having at least a light-transmitting portion forming step of forming the light-transmitting portion in a pattern and a decorative layer forming step of forming a decorative layer in a region where the light-transmitting portion is not arranged on one surface of the transparent base material. is preferred. By sequentially forming the light-transmitting portion and the decorative layer, the light-transmitting portion is used to reliably form the decorative layer only in the region where the light-transmitting portion is not arranged without requiring alignment of the decorative layer. can be formed. Therefore, the decorative layer having openings can be formed in a short time, at low cost, and in a simple process.

Further, when the decorative film further has a light-shielding layer, a light-shielding layer forming step of forming a light-shielding layer in a pattern on one surface of the transparent substrate may be performed before the light-transmitting portion forming step. After the light portion forming step and before the decorative layer forming step, a light shielding layer forming step of forming a light shielding layer in a region where the light transmitting portion is not arranged on one surface of the transparent substrate may be performed.

Further, when the decorative film further has a light-shielding layer and an intermediate layer, a light-shielding layer forming step of forming a light-shielding layer in a pattern on one surface of the transparent substrate before the light-transmitting portion forming step; An intermediate layer forming step of forming an intermediate layer in the same pattern as that of the light shielding layer may be performed thereon. A light-shielding layer forming step of forming a light-shielding layer in a region where no light part is arranged, and an intermediate layer of forming an intermediate layer on the light-shielding layer in a region where the light-transmitting part is not arranged on one surface of the transparent base material A layer forming step may be performed.

Hereinafter, a manufacturing method (first example) in which the decorative film further includes a light-shielding layer and an intermediate layer is performed in the order of a light-shielding layer forming step, an intermediate layer forming step, a translucent portion forming step, and a decorative layer forming step. and a manufacturing method (second example) in which the translucent portion forming step, the light shielding layer forming step, the intermediate layer forming step, and the decorative layer forming step are performed in this order.

(i) First example The first example of the method for producing the decorative film of this aspect includes a light-shielding layer forming step of forming a light-shielding layer in a pattern on one surface of a transparent base material, and forming a light-shielding layer on the light-shielding layer. an intermediate layer forming step of forming an intermediate layer in the same pattern; a light transmitting portion forming step of forming a light transmitting portion in an opening of the light shielding layer on one surface of the transparent substrate and the intermediate layer; and a decorative layer forming step of forming a decorative layer on the intermediate layer in the region where it is not arranged.

FIGS. 4(a) to 4(d) are process charts showing an example of the manufacturing method of the decorative film of this example. Since FIGS. 4A to 4D have been described above, descriptions thereof will be omitted here.

In this example, since the light-transmitting portion has liquid repellency, the decorative layer can be formed in a simple process without requiring alignment when forming the decorative layer.

Each step of the method for manufacturing the decorative film of this example will be described below.

(a) Light-Shielding Layer Forming Step Examples of a method for forming a light-shielding layer in a pattern on one surface of the transparent substrate include a printing method, a photolithography method, and the like. Among them, the printing method is preferable from the viewpoint of simplification of the manufacturing process. As the printing method, for example, both dot printing and solid printing can be used. Examples of printing methods include screen printing, gravure printing, offset printing, flexographic printing, inkjet printing, and the like.

(b) Intermediate Layer Forming Step Examples of the method for forming the intermediate layer on the light shielding layer in the same pattern as that of the light shielding layer include printing and photolithography. Among them, the printing method is preferable from the viewpoint of simplification of the manufacturing process. The printing method can be the same as the printing method applicable to the light shielding layer forming step.

(c) Light-transmitting portion forming step As a method for forming light-transmitting portions in the openings of the light-shielding layer and the intermediate layer on one side of the transparent base material, the light-transmitting portions are formed in a pattern on one side of the transparent base material. Any method can be used as long as it can be formed, and examples thereof include a printing method, a photolithography method, and the like. Among them, the printing method is preferable from the viewpoint of simplification of the manufacturing process. Examples of the printing method include screen printing.

In addition, as described above, as a method of imparting liquid repellency to the light transmitting portion, for example, a method of using a material containing a liquid repellent material as a material of the light transmitting portion, and a method of applying a liquid repellent treatment to the light transmitting portion. A method can be mentioned. Since the lyophobic treatment has been described above, the explanation is omitted here.

(d) Decorative Layer Forming Step Examples of a method for forming a decorative layer on the intermediate layer in the region where the translucent portion is not arranged include a printing method. Among them, the printing method is preferable from the viewpoint of simplification of the manufacturing process. As the printing method, for example, both dot printing and solid printing can be used. Examples of printing methods include screen printing, gravure printing, offset printing, flexographic printing, inkjet printing, and the like. Moreover, the printing method is preferably a method in which pressure is applied to the surface to be printed. In the case of a printing method in which pressure is applied to the surface to be printed, the height of the light-transmitting portion from the transparent base material is higher than the height of the decorative layer from the transparent base material. This is because the decorative layer composition (ink) is less likely to adhere to the light-transmitting portion, and is more likely to transfer to areas where the light-transmitting portion is not arranged.

Moreover, when the decorative layer is formed on the light-transmitting portion at the time of forming the decorative layer, the decorative layer located on the light-transmitting portion may be removed. As a method for removing the decorative layer positioned on the light-transmitting part, only the decorative layer positioned on the light-transmitting part can be removed, and the decorative layer positioned in the area where the light-transmitting part is not arranged can be removed. is not particularly limited as long as the method is not removed, and examples thereof include blasting, dry etching, rubbing, and the like. In this case, for example, as shown in FIG. 7, fine unevenness 4c can be formed on the upper surface of the light-transmitting portion 4, that is, on the surface of the light-transmitting portion 4 opposite to the surface facing the transparent substrate 2. FIG.

(e) Other Steps The method for manufacturing the decorative film of this example may have other steps in addition to the steps described above, if necessary.

The method for manufacturing the decorative film of this example may include, for example, a surface functional layer forming step of forming a surface functional layer so as to cover the decorative layer and the light-transmitting portion after the decorative layer forming step. .

The method for forming the surface functional layer may be any method as long as the surface functional layer can be formed so as to cover the decorative layer and the light-transmitting portion. A method of curing may be mentioned as necessary.

Further, a support member forming step of forming the support member on the decorative film may be included. Specifically, a step of bonding the supporting member and the decorative member with an adhesive layer, or when the supporting member is a thermoplastic resin, an insert molding method, an in-mold molding method, a TOM molding method, or the like is used to perform the decoration. It may be a step of forming a support member on one side of the film.

(ii) Second example A second example of the method for producing a decorative film according to this aspect includes a step of forming a transparent portion in a pattern on one surface of a transparent substrate; A light-shielding layer forming step of forming a light-shielding layer in a region where the light-transmitting portion is not arranged on the surface of the light-shielding layer, and an intermediate layer forming step of forming an intermediate layer on the light-shielding layer in the region where the light-transmitting portion is not arranged and a decorating layer forming step of forming a decorating layer on the intermediate layer in a region where the translucent portion is not arranged.

FIGS. 9A to 9D are process diagrams showing an example of the manufacturing method of the decorative film of this example. First, as shown in FIG. 9A, a light-transmitting portion forming step is performed to form light-transmitting portions 4 in a pattern on one surface of the transparent substrate 2 . Subsequently, as shown in FIG. 9B, a light-shielding layer forming step is performed to form a light-shielding layer 5 in a region on one surface of the transparent substrate 2 where the light-transmitting portions 4 are not arranged. As a result, the light shielding layer 5 having the openings 15 is obtained. Next, as shown in FIG. 9C, an intermediate layer forming step is performed to form the intermediate layer 6 on the light shielding layer 5 in the region where the light transmitting portion 4 is not arranged. As a result, the intermediate layer 6 having the same pattern of openings 16 as the openings 15 of the light shielding layer 5 is obtained. Next, as shown in FIG. 9(d), a decorative layer forming step is performed to form the decorative layer 3 on the intermediate layer 6 in the region where the translucent portion 4 is not arranged. As a result, the decorative layer 3 having the same patterned openings 13 as the openings 15 of the light shielding layer 5 and the openings 16 of the intermediate layer 6 is obtained.

In the manufacturing method of such a decorative film, as shown in FIG. Therefore, the decorative layer 3 can be easily formed in the region where the translucent portion 4 is not arranged. Further, as shown in FIGS. 9B to 9C, when forming the light shielding layer 5 and the intermediate layer 6, since the light transmitting portion 4 has liquid repellency, the light transmitting portion 4 is used to form the light transmitting layer. The light shielding layer 5 and the intermediate layer 6 can be easily formed in the region where the light portion 4 is not arranged. Therefore, the light shielding layer 5, the intermediate layer 6, and the decorative layer 3 are reliably formed only in the region where the light transmitting portion 4 is not arranged, without requiring alignment of the light shielding layer 5, the intermediate layer 6, and the decorative layer 3. can do.

Therefore, in this example, since the light-transmitting portion has liquid repellency, the light-shielding layer, the intermediate layer, and the decorative layer are formed in a simple process without requiring alignment when forming the light-shielding layer, the intermediate layer, and the decorative layer. Layers can be formed.

Each step of the method for manufacturing the decorative film of this example will be described below.

(a) Translucent Portion Forming Step The method of forming the translucent portions in a pattern on one surface of the transparent substrate can be the same as the method of forming the translucent portions in the first example.

(b) Light-shielding layer forming step The method of forming the light-shielding layer in the region where the light-transmitting part is not arranged on one surface of the transparent base material is the same as the method of forming the decorative layer in the first example. can be done.

(b) Intermediate Layer Forming Step The method of forming the intermediate layer on the light shielding layer in the region where the translucent portion is not arranged may be the same as the method of forming the decorative layer in the first example. .

(d) Decorative layer forming step The method of forming the decorative layer on the intermediate layer in the region where the translucent portion is not arranged is the same as the method of forming the decorative layer in the first example. can be done.

(e) Other Steps The method for manufacturing the decorative film of this example may have other steps in addition to the steps described above, if necessary.

The method for manufacturing the decorative film of this example may include, for example, a surface functional layer forming step of forming a surface functional layer so as to cover the decorative layer and the light-transmitting portion after the decorative layer forming step. . The method of forming the surface functional layer can be the same as the method of forming the surface functional layer in the first example.

Further, a supporting member forming step of forming a supporting member on the surface of the decorative film by the same method as in the first example may be provided.

2. Second Aspect of First Embodiment In a second aspect of the first embodiment of the decorative film of the present disclosure, the light projected from the surface opposite to the transparent substrate side is A member that displays information by transmitting through a transparent base material, a decorative layer that is disposed on one surface of the transparent base material and has a patterned opening, and the opening of the decorative layer and a pattern-shaped light-transmitting portion arranged in a pattern, wherein the light-transmitting portion has liquid repellency.

FIG. 1(a) is a schematic plan view showing an example of the decorative film of this embodiment, and FIG. 1(b) is a sectional view taken along line AA of FIG. 1(a). 1(a) and 1(b) have been described in the section of the first embodiment, so description thereof will be omitted here.

FIG. 10(a) is a schematic plan view showing another example of the decorative film of this embodiment, and FIG. 10(b) is a sectional view taken along line AA of FIG. 10(a). As illustrated in FIGS. 10A and 10B, the decorative film 1 includes a transparent substrate 2 and a decorative layer disposed on one surface of the transparent substrate 2 and having patterned openings 13. 3 and a patterned translucent part 4 arranged in the opening 13 of the decorative layer 3 . The translucent part 4 has liquid repellency.

The decorative film of this embodiment is disposed on the surface of the decorative layer 3 opposite to the transparent substrate 2 side, for example, as shown in FIG. A light shielding layer 5 having patterned openings 15 may be further provided.

Further, the decorative film of this embodiment is disposed between the decorative layer 3 and the light shielding layer 5, for example, as shown in FIG. An intermediate layer 6 having the same pattern of openings 16 as 15 may further be provided.

10(b), the decorative film of this embodiment has the decorative layer 3 and the translucent part 4 on the surface of the decorative layer 3 opposite to the transparent substrate 2 side. A surface functional layer 7 may be further provided so as to cover it. When the decorative film 1 further includes the light shielding layer 5 , the surface functional layer 7 is formed on the surface of the light shielding layer 5 opposite to the transparent substrate 2 side so as to cover the light shielding layer 5 and the light transmitting portion 4 . placed in

FIG. 11 is a schematic cross-sectional view showing an example of a display device provided with the decorative film of this embodiment, which is an example provided with the decorative film shown in FIGS. 10(a) and 10(b). As illustrated in FIG. 11, a display device 20 includes a display panel 21 and a decorative film 1 placed on the front surface of the display panel 21 with an adhesive layer 22 interposed therebetween.

The decorative film and the display panel may be arranged by a support frame or the like as described in the first aspect.

As shown in FIG. 10(b), the decorative film of this embodiment directs the light _L1 projected from the side of the decorative film 1 opposite to the side of the transparent substrate 2 to the transparent side of the decorative film 1. Information can be displayed through the surface on the side of the substrate 2 . Specifically, the light _L1 projected from the side of the decorative film 1 opposite to the side of the transparent base material 2 is directed from the transparent portion 4 to the side of the decorative film 1 on the side of the transparent base material 2. Information can be displayed on the surface side of the decorative film 1 on the side of the transparent base material 2 by transmitting the information to the transparent base material 2 side. Therefore, as shown in FIG. 11 , in the display device 20 including the decorative film 1 , when the display panel 21 is displaying, the viewer can see the decorative film 1 from the side of the decorative film 1 facing the transparent substrate 2 . Image information on the display panel 21 can be visually recognized through the transparent portion 4 of the one.

Moreover, in the decorative film of this embodiment, as shown _in FIG. Designs such as patterns and characters of the decorative layer 3 can be visually recognized from the surface side of the transparent base material 2 side. Therefore, as shown in FIG. 11 , in the display device 20 including the decorative film 1, when the display panel 21 is not displaying, the observer can see the decorative layer from the transparent substrate 2 side of the decorative film 1. 3 designs can be visually recognized.

FIGS. 12(a) to 12(e) are process diagrams showing an example of the method for producing the decorative film of this embodiment, and are an example of the method for producing the decorative film shown in FIGS. 10(a) and 10(b). . First, as shown in FIG. 12( a ), a transparent portion 4 is formed in a pattern on one surface of the transparent base material 2 by a printing method or the like. Next, as shown in FIG. 12(b), the decoration layer 3 is formed in a pattern by printing or the like in the area where the light-transmitting portion 4 is not arranged on one surface of the transparent base material 2. Next, as shown in FIG. Thereby, the decorative layer 3 having the openings 13 is obtained. Next, as shown in FIG. 12(c), the intermediate layer 6 is formed on the decorative layer 3 in the same pattern as the decorative layer 3 by a printing method or the like. As a result, the intermediate layer 6 having the same patterned openings 16 as the openings 13 of the decorative layer 3 is obtained. Subsequently, as shown in FIG. 12D, the light shielding layer 5 is formed on the intermediate layer 6 in the same pattern as the decorative layer 3 and the intermediate layer 6 by printing or the like. As a result, the light shielding layer 5 having the openings 15 in the same pattern as the openings 13 of the decorative layer 3 and the openings 16 of the intermediate layer 6 is obtained. Next, as shown in FIG. 12E, a surface functional layer 7 is formed so as to cover the light shielding layer 5 and the light transmitting portion 4. Next, as shown in FIG.

In the manufacturing method of such a decorative film, as shown in FIG. Therefore, the decorative layer 3 can be easily formed in the region where the translucent portion 4 is not arranged. Therefore, it is possible to reliably form the decorative layer 3 only in the region where the light-transmitting portion 4 is not arranged, without requiring alignment of the decorative layer 3 . Therefore, for example, as shown in FIG. 13, when the decoration layer 3 has decoration portions 3a and 3b of a plurality of colors (in FIG. 13, the decoration layer 3 has decoration portions 3a and 3b of two colors. ) does not require alignment of the decorative portions 3 a and 3 b with respect to the opening 13 of the decorative layer 3 . Further, as shown in FIGS. 12(c) to 12(d), when forming the light shielding layer 5 and the intermediate layer 6, since the light transmitting portion 4 has liquid repellency, the light transmitting portion 4 is used to form the transparent layer. The light shielding layer 5 and the intermediate layer 6 can be easily formed in the region where the light portion 4 is not arranged. Therefore, the light shielding layer 5 and the decorative layer 3 can be reliably formed only in the region where the light transmitting portion 4 is not arranged without requiring alignment of the light shielding layer 5 and the intermediate layer 6 .

Thus, in this aspect, since the light-transmitting portions are arranged in the openings of the decorative layer, it is not necessary to form the openings by laser processing, and the decorative layer having a large number of openings can be easily manufactured. can be formed. Therefore, it is possible to manufacture the decorative film in a short time at low cost. In addition, since the light-transmitting portion has liquid repellency, the decorative layer can be formed in a simple process without requiring alignment when forming the decorative layer. Furthermore, since the light-transmitting portion has liquid repellency, the light-shielding layer and the intermediate layer can be formed in a simple process without requiring alignment when forming the light-shielding layer and the intermediate layer.

In addition, in this aspect, since the light-transmitting portion is arranged in the opening of the decorative layer, it is not necessary to form the opening by laser processing. Thickness is possible. Therefore, the decorative layer, the intermediate layer and the light shielding layer can fully exhibit their respective functions.

The decorative film of this embodiment will be described in detail below.

(1) Light-Transmitting Part The light-transmitting part in this aspect is a pattern-shaped member that is arranged in an opening of the decorative layer, which will be described later.

The translucent part has liquid repellency. The liquid repellency of the translucent portion can be the same as in the first mode.

The translucent part has transparency. The transparency of the translucent portion can be the same as in the first mode.

Examples of the method of imparting liquid repellency to the light transmitting portion include a method of incorporating a liquid repellent material into the light transmitting portion and a method of subjecting the light transmitting portion to a liquid repellent treatment. The material of the translucent portion and the liquid-repellent treatment may be the same as those in the first mode.

The thickness of the light-transmitting portion may be such that the height of the light-transmitting portion from the transparent substrate is equal to or greater than the height of the surface of the decorative layer facing the transparent substrate from the transparent substrate. 4 from the transparent base material 2 may be lower than the height h2 of the decorative layer 3 from the transparent base material 2, for example, as shown in FIG. ), the height h2 of the decorative layer 3 from the transparent base material 2 may be the same as shown in FIG. 13 and FIG. It may be higher than the height h2 from 2. For example, in FIGS. 10B, 13 and 14A and 14B, the decorative layer 3 is arranged directly above the transparent substrate 2, and the decorative layer 3 is located on the transparent substrate 2 side. The height h1 of the transparent portion 4 from the transparent base material 2 is equal to the height h1 of the surface of the decorative layer 3 facing the transparent base material 2 from the transparent base material 2. 2 and above.

In addition, when the height of the light-transmitting portion from the transparent base material is higher than the height of the decorative layer from the transparent base material, for example, the decorative film and the surface of the decorative layer on the transparent base material side 13, the height h1 of the light-transmitting portion 4 from the transparent base material 2 is greater than the height h3 of the light-shielding layer 5 from the transparent base material 2. 14(b), the height h1 of the translucent portion 4 from the transparent base material 2 may be higher than the height h3 of the light shielding layer 5 from the transparent base material 2. Although not shown, the height of the translucent portion from the transparent base material may be the same as the height of the light shielding layer from the transparent base material.

In addition, when the height of the light-transmitting portion from the transparent base material is higher than the height of the decorative layer from the transparent base material, for example, the decorative film and the surface of the decorative layer on the transparent base material side has a light-shielding layer on the opposite side, and has an intermediate layer between the decorative layer and the light-shielding layer, for example, as shown in FIG. However, it may be lower than the height h3 of the light shielding layer 5 from the transparent substrate 2 and lower than the height h4 of the intermediate layer 6 from the transparent substrate 2. As shown in FIG. The height h1 of the portion 4 from the transparent substrate 2 may be higher than the height h4 of the intermediate layer 6 from the transparent substrate 2, and may be higher than the height h3 of the light shielding layer 5 from the transparent substrate 2. However, the height of the translucent part from the transparent base material may be higher than the height of the intermediate layer from the transparent base material and lower than the height of the light shielding layer from the transparent base material. Moreover, the height of the translucent part from the transparent base material may be the same as the height of the light shielding layer from the transparent base material, or may be the same as the height of the intermediate layer from the transparent base material.

When the height of the light-transmitting part from the transparent base material is higher than the height of the light-shielding layer from the transparent base material, the light-transmitting part is arranged at the opening of the decorative layer and the opening of the light shielding layer. . Further, when the height of the light-transmitting portion from the transparent base material is higher than the height of the intermediate layer from the transparent base material and the height of the light-shielding layer from the transparent base material is higher, the light-transmitting part It is arranged in the opening of the decoration layer, the opening of the intermediate layer and the opening of the light shielding layer.

Above all, when the light-shielding layer and the intermediate layer are not arranged on the surface of the decorative layer opposite to the transparent base material side, the height of the translucent part from the transparent base material is the same as the transparent base material of the decorative layer. It is preferably equal to or less than the height from the substrate. For example, when the height of the light-transmitting part from the transparent base material is higher than the height of the decorative layer from the transparent base material, the light-transmitting part is exposed at the part where the light-transmitting part protrudes from the decoration layer. In this case, when light is projected from the surface of the decorative film on the transparent base material side, the light transmitted through the light-transmitting portion has a large refractive index difference between the light-transmitting portion and air on the exposed surface of the light-transmitting portion. Facilitates total reflection. In particular, when the side surface of the light-transmitting part is exposed at the part where the light-transmitting part protrudes from the decorative layer, total reflection tends to occur on the exposed surface of the side surface of the light-transmitting part, and the visibility decreases depending on the viewing angle. There is a risk of On the other hand, when the height of the light-transmitting portion from the transparent base material is equal to or less than the height of the decorative layer from the transparent base material, the side surface of the light-transmitting portion is not exposed. can be suppressed, and the viewing angle characteristics can be improved.

In addition, when the light-shielding layer is arranged on the surface of the decorative layer on the transparent substrate side and the intermediate layer is not arranged, and when the intermediate layer and the light-shielding layer are arranged on the surface of the decorative layer on the transparent substrate side, In this case, the height of the translucent part from the transparent base material is preferably equal to or less than the height of the light shielding layer from the transparent base material. For the same reason as described above, when the height of the light-transmitting portion from the transparent base material is equal to or less than the height of the light-shielding layer from the transparent base material, the side surface of the light-transmitting portion is not exposed. Total reflection on the side surfaces can be suppressed, and viewing angle characteristics can be improved.

Here, the height of the translucent part from the transparent substrate refers to the height of the translucent part from one surface of the transparent substrate, and refers to the thickness of the translucent part. For example, in FIGS. 10(b), 13 and 14(a), (b), it is the height indicated by symbol h1.

The height of the surface of the decorative layer on the transparent substrate side from the transparent substrate refers to the height from one surface of the transparent substrate to the surface of the decorative layer on the transparent substrate side. For example, when the decorative layer is arranged directly above the transparent base material, the height of the surface of the decorative layer facing the transparent base material from the transparent base material is zero.

Further, the height of the decorative layer from the transparent substrate refers to the height of the decorative layer from one surface of the transparent substrate. For example, when the decorative layer is arranged directly above the transparent substrate, the height of the decorative layer from the transparent substrate refers to the thickness of the decorative layer. Specifically, it is the height indicated by symbol h2 in FIGS. 10(b), 13 and 14(a) and (b).

Further, the height of the light shielding layer from the transparent substrate refers to the height of the light shielding layer from one surface of the transparent substrate. For example, when a decorative layer, an intermediate layer, and a light-shielding layer are laminated in this order on one surface of a transparent substrate, the height of the light-shielding layer from the transparent substrate includes the decorative layer, the intermediate layer, and the light-shielding layer. refers to the total thickness of Specifically, in FIGS. 13 and 14(b), it is the height indicated by symbol h3.

Further, the height of the intermediate layer from the transparent substrate refers to the height of the intermediate layer from one surface of the transparent substrate. For example, when a decorative layer, an intermediate layer, and a light-shielding layer are laminated in this order on one side of a transparent substrate, the height of the intermediate layer from the transparent substrate is the total thickness of the decorative layer and the intermediate layer. Say. Specifically, it is the height indicated by symbol h4 in FIGS. 13 and 14(b).

The thickness of the light-transmitting portion, that is, the height of the light-transmitting portion from the transparent base material is appropriately adjusted according to the aspect of the above-described height of the light-transmitting portion from the transparent base material. Specifically, the thickness of the translucent portion can be 0.05 μm or more and 100 μm or less, preferably 0.1 μm or more and 50 μm or less, and particularly preferably 0.2 μm or more and 25 μm or less. When the thickness of the light-transmitting portion is within the above range, the decorative layer can be reliably formed only in the region where the light-transmitting portion is not arranged without requiring alignment when forming the decorative layer.

The pattern shape of the light-transmitting portion, the shape of the light-transmitting portion in plan view, the size of the light-transmitting portion in plan view, the interval between adjacent light-transmitting portions, and the like can be the same as those in the first mode.

For example, as shown in FIG. 15, the light-transmitting portion 4 may have fine unevenness 4c on the surface opposite to the transparent substrate 2-side surface of the light-transmitting portion 4 . Since the light-transmitting part 4 has the fine unevenness 4c on the surface, when the light _L1 is projected from the side of the decorative film 1 opposite to the side of the transparent substrate 2, the light-transmitting part 4 is formed by the fine unevenness 4c. This is because the light _L1 transmitted through the film 4 can be diffused, and the viewing angle characteristics of the decorative film can be improved.

When the light-transmitting part has fine unevenness on the surface, the surface roughness of the surface of the light-transmitting part opposite to the transparent base material side can be the same as in the first aspect.

The light diffusion function and haze value of the translucent portion can be the same as those in the first mode.

(2) Decorative layer The decorative layer in this aspect is a member that is disposed on one surface of the transparent substrate and has patterned openings. In this embodiment, as described above, when light is not projected from the surface of the decorative film opposite to the transparent substrate side, the decorative layer is projected from the transparent substrate side of the decorative film. Designs such as patterns and characters can be visually recognized.

The decorative layer usually has a large number of openings in plan view, as shown in FIGS. 1(a) and 10(a), for example. Since the decorative layer has a large number of openings, when light is projected from the side of the decorative film opposite to the transparent base material side, the transparent base material side of the decorative film passes through the openings. It becomes possible to transmit light to the surface side. As a result, an observer can visually recognize predetermined information by the light transmitted through the surface of the decorative film on the side of the transparent substrate.

The decorative layer can be the same as in the first aspect.

(3) Light-shielding layer The decorative film of this embodiment is disposed on the surface of the decorative layer, which will be described later, opposite to the transparent base material side, and has openings in the same pattern as the openings of the decorative layer. It is preferable to further include a light shielding layer having The light shielding layer can block light projected onto the decorative film. For example, as shown in FIG. 10(b), the light shielding layer 5 transmits the light _L1 projected from the side of the decorative film 1 opposite to the side of the transparent substrate 2, which passes through the decorative layer 3. can be suppressed. The light _L1 projected from the surface of the decorative film 1 opposite to the transparent substrate 2 side does not pass through the decorative layer 3, thereby preventing the light _L1 from being colored by the decorative layer 3. can be suppressed. As a result, it is possible to suppress deterioration in the visibility of information for an observer from the side of the decorative film 1 on the side of the transparent substrate 2 .

The light shielding layer can be the same as in the first mode.

(4) Intermediate layer The decorative film of this embodiment is disposed between the decorative layer and the light shielding layer, and has openings in the same pattern as the openings of the decorative layer and the light shielding layer. It may further comprise an intermediate layer having Since the intermediate layer is arranged between the decorative layer and the light-shielding layer, when light is not projected from the side opposite to the transparent substrate side of the decorative film, the can be made brighter to make the design of the decorative layer, such as patterns and letters, stand out. In addition, it is possible to prevent the light shielding layer from being seen through the decorative layer. Thereby, the visibility of designs such as patterns and characters on the decorative layer can be improved.

Above all, for example, when the design of the decorative layer, such as a pattern or letters, has a light color, an intermediate layer is preferably arranged between the decorative layer and the light-shielding layer. If the design of the decorative layer has a light color, the back of the decorative layer will be dark when light is not projected from the side opposite to the side of the decorative film facing the transparent base material. Since the light-shielding layer is easily seen through the decorative layer, the design of the decorative layer may appear dark to the observer. On the other hand, by arranging the intermediate layer between the decorative layer and the light shielding layer, the background of the decorative layer can be brightened and the light shielding layer can be prevented from being seen through the decorative layer. As a result, the design of the decorative layer can be enhanced, and the visibility of the design of the decorative layer, such as patterns and characters, can be enhanced. In order to prevent the light shielding layer from being seen through the decorative layer, it is necessary to increase the thickness of the decorative layer. tend to be thicker. In such a case, by providing the intermediate layer, it is possible to prevent the light shielding layer from being seen through the decoration layer without increasing the thickness of the decoration layer.

The intermediate layer may be the same as in the first aspect.

(5) Surface functional layer The decorative film of this embodiment further comprises a surface functional layer disposed so as to cover the decorative layer and the light-transmitting portion on the surface of the decorative layer opposite to the transparent base material side. may be provided. In this embodiment, for example, as shown in FIG. 10(b), the surface functional layer 7 can be arranged as the outermost layer on the surface of the decorative film 1 opposite to the transparent substrate 2 side.

The surface functional layer may be the same as in the first aspect.

(6) Transparent Base Material The transparent base material in this embodiment is a member that supports the above-described translucent portion, decorative layer, light shielding layer, intermediate layer, surface functional layer, and the like. When the decorative film of this embodiment is used in a display device, a display panel is arranged on the side opposite to the side of the decorative film facing the transparent substrate.
The transparent substrate may be the same as in the first aspect.

(7) Support member The decorative film of this aspect may have a support member arranged on either side of the decorative film. Since the supporting member is the same as in the first mode, description thereof is omitted here.

(8) Physical properties of decorative film The decorative film of this embodiment preferably has a predetermined transparency. The transparency of the decorative film can be the same as in the first aspect.
In addition, the decorative film of this embodiment has thermoplasticity and stretchability to the extent that it can be used for insert molding, in-mold molding, TOM molding, etc., as in the first embodiment, and can be molded. It is preferable to have characteristics such as excellent durability.

(9) Method for producing decorative film The method for producing the decorative film of this embodiment may be any method as long as it is a method capable of obtaining a decorative film having the above-described predetermined configuration. Having at least a light-transmitting portion forming step of forming the light-transmitting portion in a pattern and a decorative layer forming step of forming a decorative layer in a region where the light-transmitting portion is not arranged on one surface of the transparent base material. is preferred. By sequentially forming the light-transmitting portion and the decorative layer, the light-transmitting portion is used to reliably form the decorative layer only in the region where the light-transmitting portion is not arranged without requiring alignment of the decorative layer. can be formed. Therefore, the decorative layer having openings can be formed in a short time, at low cost, and in a simple process.

Further, when the decorative film further has a light-shielding layer, a light-shielding layer forming step of forming a light-shielding layer on the decorative layer in the same pattern as the decorative layer may be performed after the decorative layer-forming step. .

Further, when the decorative film further has a light-shielding layer and an intermediate layer, after the decorative layer forming step, an intermediate layer forming step of forming the intermediate layer on the decorative layer in the same pattern as the decorative layer; A light shielding layer forming step of forming a light shielding layer in the same pattern as that of the decorative layer and the intermediate layer on the intermediate layer may be performed.

A manufacturing method in which the decorative film further has a light-shielding layer and an intermediate layer and is performed in the order of the light-transmitting portion forming step, the decorative layer forming step, the intermediate layer forming step, and the light-shielding layer forming step will be described below.

As a specific example of the method for producing the decorative film of this aspect, a light-transmitting portion forming step of forming a light-transmitting portion in a pattern on one surface of the transparent substrate; A decorative layer forming step of forming a decorative layer in a region where the decorative layer is not arranged; an intermediate layer forming step of forming an intermediate layer in the same pattern as the decorative layer on the decorative layer; and a light shielding layer forming step of forming a light shielding layer in the same pattern as that of the decorative layer and the intermediate layer.

FIGS. 12(a) to 12(e) are process diagrams showing an example of the method for manufacturing the decorative film of this embodiment. Since FIGS. 12A to 12E have been described above, descriptions thereof will be omitted here.

In this aspect, since the light-transmitting portion has liquid repellency, the decorative layer, the intermediate layer and the light shielding layer can be formed in a simple process without requiring alignment when forming the decorative layer, the intermediate layer and the light shielding layer. can be formed.

Each step of the method for manufacturing the decorative film of this embodiment will be described below.

(a) Translucent Portion Forming Step The method of forming the translucent portions in a pattern on one surface of the transparent substrate may be the same as the method of forming the translucent portions in the first aspect.

(b) Decorative Layer Forming Step The method for forming the decorative layer in the region where the light-transmitting portion is not arranged on one surface of the transparent substrate is the same as the method for forming the decorative layer in the first aspect. can do.

Further, for example, as shown in FIG. Although the difference between the height h1 of the portion 4 from the transparent base material 2 and the height h2 of the decorative layer 3 from the transparent base material 2 becomes relatively large, the viscosity of the decorative layer composition can be adjusted. Thus, it is possible to form the decorative layer in the region where the translucent portion is not arranged.

Moreover, when the decorative layer is formed on the light-transmitting portion at the time of forming the decorative layer, the decorative layer located on the light-transmitting portion may be removed. The method for removing the decorative layer located on the translucent portion may be the same as the method for removing the decorative layer in the first mode.

(c) Intermediate Layer Forming Step The method for forming the intermediate layer on the decorative layer in the same pattern as the decorative layer may be the same as the method for forming the intermediate layer in the second example of the first aspect. can.

(d) Light-shielding layer forming step The method of forming the light-shielding layer in the same pattern as the decorative layer and the intermediate layer on the intermediate layer is the same as the method of forming the light-shielding layer in the second example of the first aspect. be able to.

(e) Other Steps In addition to the steps described above, the method for manufacturing the decorative film of this embodiment may have other steps as necessary.

The method for manufacturing the decorative film of this aspect may include, for example, a surface functional layer forming step of forming a surface functional layer so as to cover the light shielding layer and the light transmitting portion after the light shielding layer forming step. The method for forming the surface functional layer can be the same as the method for forming the surface functional layer in the first aspect. Moreover, it may have a support member formation process like the said 1st aspect.

II. Second embodiment A second embodiment of the decorative film of the present disclosure is a decorative film that displays information by transmitting light projected from one surface side to the other surface side, comprising: a transparent base material; a decorative layer disposed on one surface of the transparent base material and having a patterned opening; and a patterned translucent portion disposed in the opening of the decorative layer, the translucent The portion is a member containing a fluorine-based material, a silicone-based material, or containing fluorine.

The decorative film of this embodiment has two aspects. A first aspect of the decorative film of the present embodiment is a decorative film that displays information by transmitting light projected from the surface on the transparent substrate side to the surface opposite to the surface on the transparent substrate side. be. In addition, the second aspect of the decorative film of the present embodiment is a decoration that displays information by transmitting light projected from the surface opposite to the surface on the transparent substrate side to the surface on the transparent substrate side. It's a film. Each embodiment will be described below.

1. First Aspect of Second Embodiment In the first aspect of the second embodiment of the decorative film of the present disclosure, the light projected from the transparent substrate side is projected from the surface opposite to the transparent substrate side. A member that displays information by transmitting through a transparent base material, a decorative layer that is disposed on one surface of the transparent base material and has a patterned opening, and the opening of the decorative layer and a patterned light-transmitting portion arranged in a pattern, wherein the light-transmitting portion contains a fluorine-based material or a silicone-based material, or contains fluorine.

The decorative film of this aspect is the same as the first aspect of the first aspect, except that the light-transmitting portion contains a fluorine-based material, a silicone-based material, or fluorine. Therefore, the description here is omitted.

2. Second Aspect of Second Embodiment In the first aspect of the second embodiment of the decorative film of the present disclosure, the light projected from the surface opposite to the transparent substrate side is A member that displays information by transmitting through a transparent base material, a decorative layer that is disposed on one surface of the transparent base material and has a patterned opening, and the opening of the decorative layer and a patterned light-transmitting portion arranged in a pattern, wherein the light-transmitting portion contains a fluorine-based material or a silicone-based material, or contains fluorine.

The decorative film of this aspect is the same as the second aspect of the first aspect, except that the translucent portion contains a fluorine-based material, a silicone-based material, or fluorine. Therefore, the description here is omitted.

B. Display Device A display device of the present disclosure is a device that includes a display panel and the above-described decorative film arranged in front of the display panel.

3 and 11 are schematic cross-sectional views each showing an example of the display device of the present disclosure. 3 and 11 have been described in the section "A. Decorative film" above, so description thereof will be omitted here.

According to the present disclosure, by having the decorative film described above, it is possible to provide a display device that can display information on the display panel when displaying, and can visually recognize the design of the decorative film when not displaying. . Moreover, such a display device can be provided at a low cost.

Each configuration in the display device of the present disclosure will be described below.

1. Decorative Film The decorative film in the present disclosure is the same as the member described in the section “A. Decorative Film” above. Each member constituting the decorative film can be the same as described in the above section "A. Decorative film", so the description is omitted here.

2. Display Panel A display panel in the present disclosure is a member that displays information.

The display panel is not particularly limited, and examples thereof include an LED panel, an organic EL panel, a liquid crystal panel, a plasma display panel, electronic paper, and the like. Further, the display panel may be a monochromatic display or a multicolor display.

Information displayed on the display panel may be, for example, a still image or a moving image.

3. Applications Examples of applications of the display device of the present disclosure include interior materials and exterior materials for vehicles such as automobiles. A specific example is an in-vehicle display.

Applications of the display device of the present disclosure include, for example, applications as displays such as information boards, advertisements, signboards, applications as monitors for door phones, bathrooms, kitchens, bedrooms, etc., applications as display units for home appliances, Applications include use as a display portion of furniture in which a display portion is embedded, and use as illumination or daylighting for luminaires, windows, show windows, and the like.

Further, the use of the display device of the present disclosure includes, for example, use as a warning display such as an evacuation route, a fire alarm, and a warning light.

Note that the present disclosure is not limited to the above embodiments. The above embodiment is an example, and any device that has substantially the same configuration as the technical idea described in the claims of the present disclosure and achieves the same effect is the present invention. It is included in the technical scope of the disclosure.

Examples are given below to describe the present disclosure in more detail.

(Example 1)
A decorative film was formed with the layer structure shown in FIG. 1, ie, the structure of only the decorative layer. An acrylic film having a thickness of 125 μm was used as the transparent substrate. SYNERGY (manufactured by DIC Graphics Co., Ltd., product name), which is an oil-based ink, was used as the ink for forming the decorative layer. An ABS film of 400 μm is thermocompression bonded to the transparent base material side of the decorative film to form an insert molding film. Using this insert molding film, a support member (mixed resin of polycarbonate resin and ABS resin) having a thickness of 2 mm is formed by insert molding. to prepare a sample. By changing the content of the liquid-repellent material in the light-transmitting portion of the decorative film, the contact angle with pure water was changed, and the state when the decorative layer was formed was observed. Table 1 shows the results.

As shown in Table 1, good results were obtained with the light-transmitting portion having water repellency with a contact angle with pure water of 95° or more.

(Example 2)
Samples were prepared as in Example 1. The contact angle of the light-transmitting portion with n-hexadecane was changed to observe the state when the decorative layer was formed. Table 2 shows the results.

As shown in Table 2, good results were obtained with the light-transmitting portion having liquid repellency with a contact angle with n-hexadecane of 50° or more.

DESCRIPTION OF SYMBOLS 1... Decorative film 2... Transparent base material 3... Decorative layer 4... Translucent part 5... Light shielding layer 6... Intermediate layer 7... Surface functional layer 13... Opening of decorative layer 15... Opening of light shielding layer 16... Middle layer opening

Claims (12)

A decorative film that displays information by transmitting light projected from one surface side to the other surface side,
a transparent substrate;
a decorative layer disposed on one surface of the transparent base material and having a patterned opening;
a patterned translucent part arranged in the opening of the decorative layer,
The translucent part has liquid repellency,
The decorative film, wherein the height of the light-transmitting portion from the transparent substrate is equal to or less than the height of the decorative layer from the transparent substrate. 2. The decorative film according to claim 1, wherein the translucent portion contains a fluorine-based material or a silicone-based material, or contains fluorine. 3. The decorative film according to claim 1, wherein a contact angle of pure water on the surface of said transparent portion is 95[deg.] or more. 4. The decorative film according to any one of claims 1 to 3, wherein the light-transmitting portion surface has a contact angle of 50° or more with respect to n-hexadecane. A decorative film that displays information by transmitting light projected from the surface on the transparent substrate side to the surface opposite to the surface on the transparent substrate side,
further comprising a light shielding layer disposed between the transparent base material and the decorative layer and having openings in the same pattern as the openings of the decorative layer;
The decorative film according to any one of claims 1 to 4, wherein the light-transmitting portion is arranged in the opening of the light shielding layer and the opening of the decorative layer. An intermediate layer disposed between the decorative layer and the light shielding layer and having openings in the same pattern as the openings of the decorative layer and the light shielding layer,
6. The decorative film according to claim 5, wherein the light-transmitting portion is arranged in the opening of the light shielding layer, the opening of the intermediate layer, and the opening of the decorative layer. Claims 1 to 6, further comprising a surface functional layer disposed so as to cover the decorative layer and the light-transmitting portion on the surface of the decorative layer opposite to the transparent base material side. The decorative film according to any one of claims 1 to 3. A decorative film that displays information by transmitting light projected from a surface opposite to the transparent base material side to the transparent base material side,
1 to 1, further comprising a light-shielding layer disposed on a surface of the decorative layer opposite to the surface facing the transparent substrate and having openings in the same pattern as the openings of the decorative layer. The decorative film according to any one of claims up to 4. 9. The method according to claim 8, further comprising an intermediate layer disposed between the decorative layer and the light shielding layer and having openings in the same pattern as the openings of the decorative layer and the light shielding layer. Decorative film described. 10. The surface functional layer according to claim 8, further comprising a surface functional layer disposed so as to cover the light shielding layer and the light transmitting portion on the surface of the light shielding layer opposite to the surface facing the transparent substrate. decorative film. 11. The decorative film according to any one of claims 1 to 10, wherein a surface of the light-transmitting portion opposite to the transparent substrate-side surface has fine irregularities. a display panel;
A display device, comprising: the decorative film according to any one of claims 1 to 11, which is arranged in front of the display panel.

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