JP2021117451A - Sheet with optical display capability, molded product, and method of manufacturing molded product - Google Patents

Abstract

To provide a sheet with optical display capability for producing molded products with high optical display quality.SOLUTION: A sheet with optical display capability is provided, comprising a support material, a light-emitting member provided on the support material, and a light guide member for guiding light from the light-emitting member.SELECTED DRAWING: Figure 1

Description

The present invention relates to a sheet having an optical display function, a molded product using the sheet, and a method for manufacturing the molded product.

Conventionally, there is a method called film insert molding of resin used for home appliances and automobile parts. Film insert molding is a construction method in which resin injection molding and decoration or function addition with an insert film are performed at the same time.

Japanese Patent No. 4969424

The configuration of the appearance case for an electronic device obtained in the prior art (see, for example, Patent Document 1) has a problem in the quality of the optical display. For example, since it is not possible to control the light distribution of the light emitted from the LED in one type of transparent resin, the light of the LED spreads in the resin, and the light emitted when one symbol is emitted by one LED. It is less efficient. In addition, when the LED light reaches the nearby symbol display location, a symbol that does not originally need to be displayed will be displayed. That is, the conventional molded product having an optical display function does not have sufficient optical display quality.

The present invention is to provide a sheet having an optical display function for obtaining a molded product having a high optical display quality.

The sheet having the light display function according to the present invention includes a support and
A light emitting member provided on the support and
A light guide member that guides light from the light emitting member and
To be equipped.

According to the sheet having the light display function according to the present invention, the light from the light emitting member can be guided by the light guide member, so that a molded product having high light display quality can be obtained by using this sheet.

FIG. 5 is a schematic cross-sectional view showing a cross-sectional configuration of a sheet having an optical display function according to the first embodiment. It is a schematic perspective view which shows the appearance of the light guide member of the sheet which has the light display function of FIG. It is a schematic cross-sectional view which shows the cross-sectional structure of the light guide member of the sheet which has the light display function of FIG. FIG. 5 is a schematic cross-sectional view showing a cross-sectional configuration of a molded product including a sheet having an optical display function according to the first embodiment. FIG. 3 is a schematic cross-sectional view showing a mold and an arrangement of sheets having an optical display function when the molded product of FIG. 3 is formed by insert molding. It is a schematic cross-sectional view which shows the cross-sectional structure in the molded article of FIG. FIG. 5 is a schematic cross-sectional view of a case where a molded product is constructed using a resin provided with a cavity in the method for manufacturing a molded product according to the first modification of the first embodiment. FIG. 5 is a schematic cross-sectional view of a case where a molded product is constructed using a semi-solid resin in the method for manufacturing a molded product according to the second modification of the first embodiment. FIG. 5 is a schematic cross-sectional view of a case where a molded product is constructed by casting in the method for manufacturing a molded product according to the third modification of the first embodiment. It is schematic cross-sectional view which shows the cross-sectional structure of the sheet which has the light display function which concerns on Embodiment 2. FIG. 9 is a schematic cross-sectional view showing a cross-sectional structure of a film having a pattern layer used for a sheet having an optical display function of FIG. 9. It is a schematic cross-sectional view which shows the part which displays the light provided in the film of FIG. 10A. 10B is a schematic plan view showing a portion of the film of FIG. 10B to be lightly displayed from the front surface side. It is schematic cross-sectional view which shows the cross-sectional structure of the molded article which concerns on Embodiment 2. FIG. It is a schematic cross-sectional view which shows the cross-sectional structure of the molded article which concerns on Embodiment 3. FIG. It is a schematic cross-sectional view which shows the cross-sectional structure in the thickness direction of the molded article of FIG. FIG. 5 is a schematic cross-sectional view showing an arrangement of a mold, a decorative sheet, and a sheet having an optical display function when the molded product of FIG. 12 is formed by insert molding. It is a schematic cross-sectional view which shows the cross-sectional structure in the molded article of FIG. FIG. 5 is a schematic cross-sectional view of a case where a molded product is constructed using a resin provided with a cavity in the method for manufacturing a molded product according to the first modification of the third embodiment. FIG. 5 is a schematic cross-sectional view of a case where a molded product is constructed using a semi-solid resin in the method for manufacturing a molded product according to the second modification of the third embodiment. FIG. 5 is a schematic cross-sectional view of a case where a molded product is constructed by casting in the method for manufacturing a molded product according to the third modification of the third embodiment.

The sheet having the light display function according to the first aspect includes a support and
A light emitting member provided on the support and
A light guide member that guides light from the light emitting member and
To be equipped.

In the sheet having the light display function according to the second aspect, in the first aspect, the light guide member may include a reflecting surface that changes the direction of light.

In the second aspect of the sheet having the light display function according to the third aspect, the light guide member is a first region made of a first material having a transmittance of 60% / mm or more with respect to incident light. And a second region made of a second material having a reflectance of 60% or more with respect to the incident light.
The reflective surface may be defined at the interface between the first region and the second region.

In the second aspect of the sheet having the light display function according to the fourth aspect, the light guide member is made of a first material having a transmittance of 60% / mm or more with respect to incident light.
The reflective surface may be defined by a coating layer provided on the first material.

In the sheet having the light display function according to the fifth aspect, in any one of the second to fourth aspects, the reflective surface may be a curved surface.

In any one of the first to fifth aspects of the sheet having the light display function according to the sixth aspect, the light guide member may be capable of incident light from two or more directions different from each other. ..

In the first aspect of the sheet having the light display function according to the seventh aspect, the light guide member may have an uneven surface for scattering light.

The molded product according to the eighth aspect includes the sheet having the light display function according to any one of the first to seventh aspects and the sheet.
A resin that covers the light emitting member and the light guide member of the sheet, and
To be equipped.

In the eighth aspect of the molded article according to the ninth aspect, the sheet having the light display function may further include a material sheet provided on the surface side of the molded article.

In the eighth aspect, the molded article according to the tenth aspect further includes a decorative sheet for decorative purposes including a material sheet provided on the surface side of the molded article.
The sheet having the light display function is provided on the back surface side of the molded product.
The resin may be provided between the decorative sheet and the sheet having the light display function.

In the ninth or tenth aspect of the molded product according to the eleventh aspect, the material sheet is made of at least one material selected from the group consisting of a printing film, wood, stone, cork, leather, and metal. You may.

The method for manufacturing a molded product according to the twelfth aspect includes a step of arranging the sheet having the light display function according to any one of the first to seventh aspects so as to face the cavity of the mold.
The step of filling the cavity with resin to obtain a molded product,
including.

In the method for manufacturing a molded product according to the thirteenth aspect, a decorative sheet for decoration including a material sheet is arranged in a first mold corresponding to the front surface side of the molded product, and the molded product is supported on the back surface side. A step of arranging a sheet having the light display function according to any one of the first to seventh aspects, and a step of arranging the sheet having the light display function on the second mold.
The step of filling the cavity between the first mold and the second mold with resin,
including.

The method for manufacturing a molded product according to the fourteenth aspect includes a step of providing a first resin layer on a decorative sheet for decoration including a material sheet and forming a cavity in the first resin layer.
The sheet having the light display function and the decorative sheet so that the light emitting member and the light guide member of the sheet having the light display function according to any one of the first to seventh aspects enter the cavity. Steps to paste and
The step of filling the cavity with the second resin,
including.

The method for manufacturing a molded product according to the fifteenth aspect includes a step of providing a first resin layer on a decorative sheet for decoration including a material sheet and forming a cavity in the first resin layer.
The step of filling the cavity with the second resin,
The sheet having the light display function and the decorative sheet so that the light emitting member and the light guide member of the sheet having the light display function according to any one of the first to seventh aspects enter the cavity. Steps to paste and
including.

The method for manufacturing a molded product according to the sixteenth aspect includes a step of providing a resin layer on a decorative sheet for decorative purposes including a material sheet, and a step of providing a resin layer.
The light emitting member of the sheet having the light display function and the light guide member according to any one of the first to seventh aspects, the sheet having the light display function and the decorative sheet so as to embed the light guide member in the resin layer. Steps to paste and
A method for manufacturing an article, including.

The method for manufacturing a molded product according to the seventeenth aspect includes a step of providing a resin layer covering the light emitting member and the light guide member of the sheet having the light display function according to any one of the first to seventh aspects. ,
A step of laminating a decorative sheet for decoration including a material sheet on the resin layer,
including.

In any of the thirteenth to seventeenth aspects, the method for manufacturing a molded product according to the eighteenth aspect includes a portion for displaying the light of the decorative sheet and the light guide member of the sheet having the light display function. It may be aligned with the part that guides the light.

Hereinafter, a sheet having an optical display function according to the embodiment, a molded product using the sheet, and a method for manufacturing the molded product will be described with reference to the accompanying drawings. In the drawings, substantially the same members are designated by the same reference numerals.

(Embodiment 1)
<Sheet with optical display function>
FIG. 1 is a schematic cross-sectional view showing a cross-sectional configuration of a sheet 38 having an optical display function according to the first embodiment. FIG. 2A is a schematic perspective view showing the appearance of the light guide member 36 of the sheet 38 having the light display function of FIG. FIG. 2B is a schematic cross-sectional view showing a cross-sectional configuration of the light guide member 36 of the sheet 38 having the light display function of FIG.
The sheet 38 having the light display function according to the first embodiment is provided on the film 2 which is a support, the LED 33 which is a light emitting member provided on the film 2, and the light from the LED 33. The light guide member 36 for guiding the light guide member 36 is provided.

According to the sheet 38 having the light display function, since the light guide member 36 is provided, the light can be guided only to the place where the light display is desired, and a molded product having a high light display quality can be obtained.

Hereinafter, the members constituting the sheet 38 having this light display function will be described.

<Film>
The film 2 is a support for the sheet 38 having an optical display function. As shown in FIG. 13, for example, the film 2 has a resist layer 11 from the back surface side, an electrostatic sensor pattern 16 using conductive ink, a base film 8, a conductive ink layer 12, a resist layer 11, and an adhesive layer. It may be composed of 10. The above layer structure is an example, and is not limited thereto. For example, when the sensor input is not performed, the electrostatic sensor pattern 16 is not required.

The resist layer 11 is provided to prevent the conductive ink layer 12 applied to the base film 8 from being oxidized in the air or being deteriorated by ultraviolet rays, and is provided with an ultraviolet curable resin, a radiation curable resin, or a thermosetting resin. It may be constructed using a sex resin.

In the conductive ink layer 12, the conductive ink used is composed of a resin and a filler of a metal material such as silver, gold, or copper. By printing a wiring pattern on the base film 8 by a screen printing device, an inkjet printing device, a gravure printing device, or an etching method using conductive ink, the base film 8 can have the function of a circuit board. can. Further, not only a rigid substrate but also a flexible substrate (flexible printed circuit: FPC) can be formed. Further, since multi-branch three-dimensional wiring can be performed by combining a plurality of shapes, it is possible to realize a three-dimensional circuit board.

In a part of the conductive ink layer 12, for example, the resist layer 11 and the adhesive layer 10 are not arranged, but the conductive adhesive layer 13 is arranged in the exposed conductive ink layer 12, and the electronic component 14 is placed on the conductive adhesive layer 13. By mounting the above, it is possible to impart an electronic function to the base film 8.

The conductive adhesive layer 13 is composed of a resin and a filler of a metal material such as silver, gold, or copper, and a light emitting member 33 and a conductive ink layer 12 in which a metal material or resin having a low melting point such as solder is mixed. It is provided to make the and conductive. The conductive adhesive layer 13 can be arranged by a screen printing device or a dispenser coating.

The underfill 15 is arranged so that the light emitting member 33 does not fall off from the base film 8 when the light emitting member 33 and the conductive adhesive layer 13 are not sufficiently adhered to each other only by the conductive adhesive layer 13. After the light emitting member 33 is mounted, the underfill 15 applies a dispenser to the exposed portion of the conductive ink layer 12, the side end portion of the conductive adhesive layer 13, and the end portion of the mounting surface of the light emitting member 33. It can be arranged so as to cover it. The underfill 15 may be composed of an ultraviolet curable resin, a radiation curable resin, or a thermosetting resin.

By providing two sets of conductive ink layers and resist layers on both sides of the base film 8, electronic functions can be imparted to both sides of the base film 8.

<Light emitting member>
As the light emitting member 33, for example, an LED can be used.

<Light guide member>
The light guide member 36 includes a portion 34 having a reflection function and a portion 35 having a light transmission function. The portion 34 having a reflective function is, for example, made of a material having a reflectance of 60% or more, may be made of a material having a reflectance of 80% or more, and further, a material having a reflectance of 95% or more. It may be composed of. The portion 34 having the reflection function corresponds to the bottom surface / slope of the light guide member 36 and a part of the top surface / side surface. The reflection function of the bottom surface is not essential when the surface on which the light guide member 36 is mounted has an equivalent function. The top and side reflection functions are used to collect LED light. The portion 35 having a light transmittance function is, for example, made of a transparent resin having a transmittance of 60% or more, or may be made of a transparent resin having a transmittance of 80% or more, and has a transmittance of 90% / mm. It may be composed of the above transparent resin.

The light guide member 36 is provided by painting on the surface of a portion 35 having a light transmitting function, or is formed by two-color molding. In the latter case, for example, one of the part 34 having a reflection function and the part 35 having a light transmission function is formed, and then the material forming the other part is filled. A space may be provided between the LED 33 and the light guide member 36. Alternatively, the LED 33 and the light guide member 36 may be brought into close contact with each other. Further, the LED 33 and the light guide member 36 may be integrally configured. Further, regarding the height of the LED 33 and the height of the light guide member 36, the light guide member 36 may be higher or the same height as the LED 33.

A reflective surface that changes the direction of light is formed at the interface between the portion 35 having a light transmitting function and the portion 34 having a reflecting function. The reflecting surface is not limited to a flat surface and may be a curved surface. Further, the reflecting surface may be formed of a reflecting plate.

The light guide member 36 is not limited to guiding incident light from one direction, and may be capable of incident light from two or more different directions. For example, light in two directions from both ends may be incident. Further, light from four directions may be incident. Thereby, the light can be guided to a wide range of objects or a plurality of objects by collecting the light from the plurality of light emitting members.
Further, the light is not limited to being guided in one direction, and may be guided in two or more directions, for example. As a result, the light from one light emitting member can guide the light to a plurality of objects.

Further, the light guide member 36 may have an uneven surface that scatters light. This makes it possible to guide light over a wide range.

<Material sheet>
The sheet having the light display function may include a material sheet. The material sheet may consist of, for example, at least one material selected from the group consisting of printing film, wood, stone, cork, cloth, natural leather, artificial leather, and metal. The material is not limited to these as long as it is a material that can express a design that meets the characteristics and needs of the product.

<Molded product>
FIG. 3 is a schematic cross-sectional view showing a cross-sectional configuration of a molded product 6 including a sheet 38 having an optical display function according to the first embodiment.
The molded product 6 according to the first embodiment is provided with a sheet 38 having a light display function on the back surface side, and the LED 33 and the light guide member 36 of the sheet 38 having the light display function are resin 3 on the front surface side. It is composed by covering with.
In the molded product 6, the light guide member 36 can guide the light only to the portion to be light-displayed, so that a high light display quality can be obtained.

<Resin>
As the resin 3, for example, a commercially available general-purpose resin such as PMMA resin, ABS resin, PS resin, or PC resin may be used.

<Manufacturing method of molded products>
FIG. 4 is a schematic cross-sectional view showing an arrangement of dies 4 and 5 and a sheet 38 having an optical display function when the molded product of FIG. 3 is formed by insert molding.
This molded product 6 is obtained, for example, by insert molding. In this case, a sheet 38 having an optical display function is arranged on the mold 4 corresponding to the back surface side of the molded product, the mold 4 and the mold 5 are clamped, and the cavity between the mold 4 and the mold 5 is formed. Is filled with the resin 3 to obtain a molded product 6.
The manufacturing method of the molded product 6 is not limited to insert molding.

(Modification example 1)
FIG. 5 is a schematic cross-sectional view showing a cross-sectional structure of the molded product 6 of FIG. FIG. 6 is a schematic cross-sectional view of a molded product using the resin 3 provided with the cavity 40.
As shown in FIG. 6, for example, a cavity 40 may be provided in the resin 3, and a light emitting member 33 and a light guide member 36 of a sheet 38 having a light display function may be fitted in the cavity 40 to form a molded product. In this case, in addition to adhesives such as thermosetting adhesives, UV curable adhesives, and two-component curable adhesives, OCA can also be used for bonding. Further, the cavity 40 needs to have a larger shape than the LED 33 and the light guide member 36 in order to fit the LED 33 and the light guide member 36. After fitting into the cavity 40, it may be sealed by injecting a thermosetting resin, a UV curing resin, or a two-component curing resin. By sealing in this way, the display quality can be improved.

(Modification 2)
FIG. 7 is a schematic cross-sectional view of the method for manufacturing a molded product according to the second modification, in which a molded product is constructed using the semi-solid resin 3a.
As shown in FIG. 7, a molded product can be obtained by using the semi-solid resin 3a and pushing the LED 33 and the light guide member 36 of the sheet 38 having the light display function into the semi-solid resin 3a.

(Modification example 3)
FIG. 8 is a schematic cross-sectional view of a molded product manufactured by casting in the method for manufacturing a molded product according to Modification 3.
As shown in FIG. 8, the cavity between the molds can be filled with the resin 3 by casting to obtain a molded product. In this case, since the resin is filled by its own weight without applying pressure as compared with the case of injection molding, the influence on the light emitting member 33 and the light guide member 36 can be suppressed.

(Embodiment 2)
<Sheet with optical display function>
FIG. 9 is a schematic cross-sectional view showing a cross-sectional configuration of the sheet 38a having the light display function according to the second embodiment. FIG. 10A is a schematic cross-sectional view showing a cross-sectional configuration of a film 2a having a pattern layer 9 used for the sheet having the light display function of FIG. FIG. 10B is a schematic cross-sectional view showing a portion 17 for displaying light provided in the film of FIG. 10A. FIG. 10C is a schematic plan view showing the lightly displayed portion 17 of the film of FIG. 10B from the surface side.
The sheet 38a having the light display function according to the second embodiment is different from the sheet having the light display function according to the first embodiment in that it is used on the surface side of the molded product. Further, as shown in FIG. 9, the light guide member 36 is characterized in that the light 1 from the LED 33 is guided to the surface side via the film 2a which is a support. The film 2a has a surface functional layer 7, a base film 8, a pattern layer 9, and an adhesive layer 10 when viewed from the surface side. Further, the pattern layer 9 has a portion 17 to be lightly displayed. The portion 17 to be lightly displayed may be, for example, a light transmitting layer.

The surface functional layer 7 is used to prevent scratches or damage on the appearance surface of the molded product, to increase the depth of the pattern of the pattern layer 9, or to prevent deterioration of the molded product due to ultraviolet rays, or to prevent stains. It is a layer provided in. The surface functional layer 7 may be formed of, for example, an ultraviolet curable resin, a radiation curable resin, or a thermosetting resin.

The base film 8 is a layer that serves as a carrier film for applying the surface functional layer 7, the pattern layer 9, and the adhesive layer 10. The base film 8 may be made of, for example, a material such as polyethylene terephthalate, polycarbonate, polyimide, polyethylene naphthalate, or PMMA (polymethyl methacrylate resin).

The pattern layer 9 is a layer provided to give a design to the appearance surface. The pattern layer 9 may be composed of, for example, an organic pigment and a polyvinyl resin, a polyamide resin, a polyester resin, an acrylic resin, or a polyurethane resin. Further, the pattern layer 9 can be given a mirror-like design on the outer surface by forming a metal foil film such as aluminum, tin, or indium by a method such as sputtering or vacuum deposition.

The adhesive layer 10 is a layer that plays a role of bringing the injection molding resin and the pattern layer 9 into close contact with each other. The adhesive layer 10 may be composed of, for example, a polyacrylic resin, a polystyrene resin, a polycarbonate resin, or a polyamide resin having an affinity for both the resin 3 and the pattern layer 9.

According to the sheet 38a having the light display function, the light can be guided only to the portion 17 to be lightly displayed by the light guide member 36, and a molded product having a high light display quality can be obtained.

<Molded product>
FIG. 11 is a schematic cross-sectional view showing a cross-sectional configuration of the molded product 6a according to the second embodiment.
This molded product 6a is different from the molded product according to the first embodiment in that the sheet 38a having an optical display function is arranged on the surface side. In addition, the film 2a has a pattern layer 9. In the molded product 6a, a high light display quality can be obtained by aligning the light guide member 36 with the portion 17 in the pattern layer 9 to be lightly displayed. Further, by making the shape of the light emitting portion of the light guide member 36 that guides the light and the shape of the portion 17 of the pattern layer 9 to be lightly displayed the same, higher light display quality can be obtained.

(Embodiment 3)
FIG. 12 is a schematic cross-sectional view showing a cross-sectional configuration of the molded product 6b according to the third embodiment. FIG. 13 is a schematic cross-sectional view showing a cross-sectional configuration of the molded product 6b of FIG. 12 in the thickness direction.
The molded article 6b according to the third embodiment was used as a decorative sheet on the surface side of the molded article according to the second embodiment as compared with the molded article according to the first embodiment and the molded article according to the second embodiment. The difference is that the film 2a having the pattern layer is provided, and the sheet 38 having the light display function according to the first embodiment is arranged on the back surface side. The molded product 6b is configured by filling the resin 3 between the film 2a, which is the decorative sheet 37 on the front surface side, and the sheet 38 having the light display function on the back surface side. The light 1 from the light emitting member 33 of the sheet 38 having the light display function on the back surface side is guided by the light guide member 36 to the portion 17 to be lightly displayed on the pattern layer 9 of the film 2a on the front surface side. In this case, the direct light from the light emitting member 33 is shielded by the portion 34 having the reflecting function on the upper surface side of the light guide member 36 so that the direct light does not reach the portion 17 other than the portion 17 to be light-displayed. Specifically, the light 1 from the light emitting member 33 is repeatedly reflected and reflected on the inclined surface to reach the portion 17 to be light-displayed.

As shown in FIG. 13, for example, the film 2 constituting the sheet 38 having the light display function on the back surface side includes a resist layer 11, an electrostatic sensor pattern 16 using conductive ink, and a base film 8 from the back surface side. It is composed of a conductive ink layer 12, a resist layer 11, and an adhesive layer 10. Further, the light emitting member 33 is configured by providing an underfill 15 and a conductive adhesive layer 13 on the conductive ink layer 12. The layer structure of the film 2 is an example and is not limited thereto.

<Manufacturing method of molded products>
FIG. 14 is a schematic cross-sectional view showing the arrangement of the molds 4 and 5, the decorative sheet 37, and the sheet 38 having the light display function when the molded product of FIG. 12 is formed by insert molding.
This molded product 6 is obtained, for example, by insert molding. In this case, a sheet 38 having an optical display function is arranged on the mold 4 corresponding to the back surface side of the molded product, the mold 4 and the mold 5 are clamped, and the cavity between the mold 4 and the mold 5 is formed. Is filled with the resin 3 to obtain a molded product 6.
The manufacturing method of the molded product 6 is not limited to insert molding.

(Modification example 1)
FIG. 15 is a schematic cross-sectional view showing a cross-sectional structure of the molded product 6b of FIG. FIG. 16 is a schematic cross-sectional view of the case where the molded product is constructed by using the resin 3 provided with the cavity 40 in the method for manufacturing the molded product according to the first modification of the third embodiment.
As shown in FIG. 16, for example, the resin 3 is provided in the film 2a which is the decorative sheet 37, the cavity 40 is provided in the resin 3, and the light emitting member 33 and the light guide of the sheet 38 having the light display function in the cavity 40. The member 36 may be fitted to form a molded product. In this case, in addition to adhesives such as thermosetting adhesives, UV curable adhesives, and two-component curable adhesives, OCA can also be used for bonding. Further, the cavity 40 needs to have a larger shape than the LED 33 and the light guide member 36 in order to fit the LED 33 and the light guide member 36. The cavity 40 may be sealed by injecting a thermosetting resin, a UV curable resin, or a two-component curable resin after fitting. By sealing in this way, the display quality can be improved.

(Modification 2)
FIG. 17 is a schematic cross-sectional view of the case where the molded product is constructed by using the semi-solid resin 3a in the method for producing the molded product according to the second modification of the third embodiment.
As shown in FIG. 17, the semi-solid resin 3a is provided on the film 2a which is the decorative sheet 37, and the LED 33 and the light guide member 36 of the sheet 38 having the light display function are pushed into the semi-solid resin 3a. Therefore, a molded product can be obtained.

(Modification example 3)
FIG. 8 is a schematic cross-sectional view of a molded product manufactured by casting in the method for manufacturing a molded product according to the third modification of the third embodiment.
As shown in FIG. 18, the cavity between the film 2a, which is the decorative sheet 37 provided between the molds, and the sheet 38 having the light display function is filled with the resin 3 by casting to obtain a molded product. Can be done. In this case, since the resin is filled by its own weight without applying pressure as compared with the case of injection molding, the influence on the light emitting member 33 and the light guide member 36 can be suppressed.

It should be noted that the present disclosure includes appropriately combining any of the various embodiments and / or examples described above, and the respective embodiments and / or embodiments. The effects of the examples can be achieved.

According to the sheet having the light display function according to the present invention, the light can be guided only to the place to be light-displayed by the light guide member, and a molded product having a high light display quality can be obtained.
Therefore, it is possible to provide molded products such as home appliances and automobile parts having high design.

1 Light 2, 2a Film 3 Resin 3a Semi-solid resin 4 Fixed side first mold 5 Movable side first mold 6, 6a, 6b Molded product 7 Surface functional layer 8 Base film 9 Picture layer 10 Adhesion Layer 11 Resist layer 12 Conductive ink layer 13 Conductive adhesive layer 15 Underfill 16 Electrostatic sensor pattern with conductive ink 17 Light transmitting part 33 LED (light emitting member)
34 Part with reflection function 35 Part with light transmission function 36 Light guide member 37 Decorative sheet 38 Sheet with light display function 40 Cavity

Claims (18)

With the support
A light emitting member provided on the support and
A light guide member that guides light from the light emitting member and
A sheet having an optical display function. The sheet having the light display function according to claim 1, wherein the light guide member includes a reflecting surface that changes the direction of light. The light guide member has a first region made of a first material having a transmittance of 60% / mm or more for incident light and a second material made of a second material having a reflectance of 60% or more for incident light. Consists of the area of
The sheet having the light display function according to claim 2, wherein the reflective surface is defined at an interface between the first region and the second region. The light guide member is made of a first material having a transmittance of 60% / mm or more with respect to incident light.
The sheet having the light display function according to claim 2, wherein the reflective surface is defined by a coating layer provided on the first material. The sheet having the light display function according to any one of claims 2 to 4, wherein the reflecting surface is a curved surface. The sheet having the light display function according to any one of claims 1 to 5, wherein the light guide member can receive light from two or more directions different from each other. The sheet having the light display function according to claim 1, wherein the light guide member has an uneven surface that scatters light. The sheet having the light display function according to any one of claims 1 to 7.
A resin that covers the light emitting member and the light guide member of the sheet, and
A molded product with. The molded product according to claim 8, wherein the sheet having the light display function further includes a material sheet provided on the surface side of the molded product. A decorative sheet for decorative purposes including a material sheet provided on the surface side of the molded product is further provided.
The sheet having the light display function is provided on the back surface side of the molded product.
The resin is provided between the decorative sheet and the sheet having an optical display function.
The molded product according to claim 8. The molded product according to claim 9 or 10, wherein the material sheet is made of at least one material selected from the group consisting of a printing film, wood, stone, cork, leather, and metal. A step of arranging the sheet having the light display function according to any one of claims 1 to 7 so as to face the cavity of the mold.
The step of filling the cavity with resin to obtain a molded product,
A method for manufacturing an article, including. A decorative sheet for decoration including a material sheet is arranged in the first mold corresponding to the front surface side of the molded product, and claims 1 to 7 are arranged in the second mold corresponding to the back surface side of the molded product. The step of arranging the sheet having the light display function according to any one of the above, and
The step of filling the cavity between the first mold and the second mold with resin,
A method for manufacturing an article, including. A step of providing a first resin layer on a decorative sheet for decoration including a material sheet and forming a cavity in the first resin layer, and a step of forming a cavity in the first resin layer.
The light emitting member of the sheet having the light display function according to any one of claims 1 to 7 and the sheet having the light display function and the decorative sheet so that the light guide member enters the cavity. Steps to paste and
The step of filling the cavity with the second resin,
A method for manufacturing an article, including. A step of providing a first resin layer on a decorative sheet for decoration including a material sheet and forming a cavity in the first resin layer, and a step of forming a cavity in the first resin layer.
The step of filling the cavity with the second resin,
The light emitting member of the sheet having the light display function according to any one of claims 1 to 7 and the sheet having the light display function and the decorative sheet so that the light guide member enters the cavity. Steps to paste and
A method for manufacturing an article, including. Steps to provide a resin layer on decorative sheets for decorative purposes, including material sheets,
A step of laminating the sheet having the light display function and the decorative sheet so as to embed the light emitting member and the light guide member of the sheet having the light display function according to claims 1 to 7 in the resin layer. ,
A method for manufacturing an article, including. A step of providing a resin layer covering the light emitting member and the light guide member of the sheet having the light display function according to any one of claims 1 to 7.
A step of laminating a decorative sheet for decoration including a material sheet on the resin layer,
A method for manufacturing an article, including. The molded product according to any one of claims 13 to 17, wherein a portion of the decorative sheet for light display and a portion of the sheet having the light display function that guides light by the light guide member are aligned. Manufacturing method.

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