JP2007311044A - Light emitting device and illumination method - Google Patents

Abstract

[PROBLEMS] To achieve wide area illumination of a casing by light from an illumination light source without restricting design shape and mounting of internal units, modules and components, thereby improving design.
The illumination structure of the present invention has a two-layer structure of a first housing case 20 and a second housing case 30 on the side to be illuminated of the light emitting device 10 and an EL sheet 40 between the two cases. The structure which laminates | stacks on the design side surface of the two housing | casing case 30 is characterized. Further, a light diffusing member (light reflecting decorative film 22) is provided on the surface of the first casing case 20, and a reflecting member (first reflecting layer 50) is provided on the design side surface of the second casing case 30. Then, the light emitted from the EL sheet 40 is diffused thereby, and the wide area of the first housing case 20 is illuminated. Therefore, restrictions on the design surface shape and mounting restrictions on the space 72 inside the housing case are small, and the EL sheet 40 can be reused when the molded product is defective.
[Selection] Figure 2

Description

  The present invention relates to a light emitting device, for example, a light emitting device that is an exterior case of an electronic device such as a mobile phone or a portable information terminal, and relates to an illumination method using the light emitting device.

  2. Description of the Related Art Conventionally, in a cellular phone, a part of a housing case is illuminated using an optical fiber to illuminate a decorative pattern, or a part of a housing case using an EL (Electro Luminescence) light emitting sheet (EL sheet). There is something to illuminate.

  For example, the technique of Patent Document 1 illuminates light from a light source in a pattern drawn by the optical fiber by bonding and integrating an optical fiber member with a casing case of a mobile phone. However, this method is not suitable for illuminating a wide area because it is limited to illuminating only the portion where the optical fiber member is bonded. Moreover, since it is necessary to input light from the edge part of an optical fiber member, there exists a subject that the design and mounting restrictions by the position of a light source and an optical fiber member are large.

Moreover, the technique of patent document 2 is, after installing the EL light emission decoration sheet which laminated | stacked the EL sheet in the mold on the decoration sheet preformed so as to have a three-dimensional shape, the molten resin is put in the mold. It is a method of illuminating a molded product by light emission from the EL sheet by injection injection and welding the EL light emitting decorative sheet with an injection resin to form an integrally molded product. In the above method, in addition to requiring pre-molding, when installing the EL light emitting decorative sheet in the mold, high technology and accuracy are required, so production efficiency is poor, and when molding defects occur, Since the EL sheet cannot be reused, there is a problem that it is uneconomical. Moreover, since the EL sheet is attached to the decorative sheet, the three-dimensional shape of the decorative sheet is limited, and the degree of freedom of the design surface shape is reduced. Furthermore, there is a problem that illumination can be performed only on a design surface that is equal to or smaller than the area of the EL sheet.
JP 2005-518108 A JP 2003-163083 A

  For example, the present invention solves the above-described problems, and even if it is a three-dimensional shape, it can be uniformly illuminated by an EL sheet, so that it has excellent design characteristics, design surface shape restrictions and mounting restrictions are small, and molding A technology is provided that enables the EL sheet to be reused even in the case of defective products.

A light emitting device according to the present invention includes an inner housing case, a light emitting member that is provided outside the inner housing case and emits light,
A light-emitting member is provided outside the light-emitting member. The light emitted from the light-emitting member is incident on the light, and the incident light is transmitted to the outside, and the light incident from the outside is reflected. The outer housing is provided on the outside of the reflective member. An outer case having a light diffusing member that diffuses and outputs incident light that is incident on the light transmitted by the reflecting member and the light reflected by the reflecting member. And

  The light emitting device according to the present invention includes a light diffusing member that enters light emitted from the light emitting member, diffuses and outputs the incident light, and is diffused inside the light emitting device. The structure is such that light is reflected by the reflecting member and then diffused and output again by the light diffusing member, so that there is little restriction due to the surface shape of the housing case, and a wide area of the housing case can be illuminated uniformly. . As a result, the mobile phone can be given a new design. Furthermore, since an EL sheet or the like is used as the light emitting member, there is no shape restriction on the back surface of the inner housing case, so that the strength of the inner housing case can be prevented from being reduced. There is an effect that the strength can be increased.

Embodiment 1 FIG.
The first embodiment will be described with reference to the drawings.

  FIG. 1 is a diagram showing an example of the appearance of a light emitting device 10 that is an illuminated decorative molded product according to the present embodiment, FIG. 1 (a) is a plan view, and FIG. 1 (b) is a first view. The top view of the 2nd housing case (inner housing case) which removed the housing case (outer housing case) is shown. 2 is a cross-sectional view taken along the line CC of the light emitting device illustrated in FIG.

The whole structure of the light-emitting device 10 which is the illumination type decorative molded product which concerns on this Embodiment is demonstrated.
As shown in FIGS. 1A and 2, the light emitting device 10 includes a first housing case 20 (outer housing case), a second housing case 30 (inner housing case), and a third housing case 31. It is configured. In the present embodiment, an example in which the light emitting device 10 is used as an exterior case of a mobile phone is shown, and the inside 72 (second housing case 30 and third housing case 31 of the light emitting device 10 is shown. (Internal space between) is provided with an electronic device (not shown). This is an example, and the light-emitting device 10 can be used as an exterior case or a case for a portable information terminal, an electronic notebook, a portable radio / TV, or a portable music device, in addition to a cellular phone. Further, the light emitting device 10 may be used as a simple lighting device without the inside 72 of the housing case.

  The first housing case 20 (outer housing case) is a light reflecting decorative film 22 (light diffusion) on a base material case molded product 21 (design side surface, outside) formed from a transparent resin as a base material. An example of a member is insert-molded. The base case molded product 21 is made of a light transmissive material. Examples of the light transmissive material include polycarbonate resin, acrylic resin, polyamide resin, polyimide resin, polyester resin, polyolefin resin, polyurethane resin, and the like. The light reflecting decorative film 22 can transmit and diffuse light from an EL sheet 40 (light emitting member) installed in a second housing case described later by using a light transmissive material. . The light reflection decorative film 22 is composed of a plurality of layers in order to reflect and diffuse light, and details thereof will be described later.

The light emitting device 10 includes an EL sheet 40 that is a light emitting member between the first housing case 20 and the second housing case 30 as shown in FIG. It is installed on the outside. Further, on the whole or a part of the surface (design surface side) of the EL sheet 40 (light emitting member) and the surface (design surface side, outer surface) of the second housing case 30 on which the EL sheet 40 is attached, A first light reflecting layer 50 (an example of a reflecting member) capable of reflecting light is formed. Further, the second light reflecting layer 51 (an example of a peripheral reflecting member) is formed on the surface of the second housing case 30 in an annular shape (doughnut shape, square shape) so as to surround the EL sheet 40. Yes.
FIG. 1B shows a plan view of an example of the second housing case 30 (the light emitting device 10 with the first housing case 20 removed).

The first light reflection layer 50 (reflection member) and the second light reflection layer 51 (peripheral reflection member) are formed on the surfaces of the EL sheet 40 and the second housing case 30 on the EL sheet attachment side, and the EL Of the light emitted from the EL light source (for example, an EL layer 42 described later) of the sheet 40, the light partially reflected by the light reflecting decorative film 22 is reflected again to the first housing case side (outside). Is a layer. The first light reflecting layer 50 and the second light reflecting layer 51 are formed with a metal film capable of specular reflection. The metal film having reflectivity is desirably as low as possible in light transmission.
In addition, the second light reflecting layer 51 is formed on the surface of the second housing case 30 so as to surround the EL sheet 40 as shown in FIG. It is formed up to the junction. The reason why the second light reflecting layer 51 is formed around the EL sheet 40 is that the light that is diffusely reflected from the light reflecting decorative film 22 and returns to the inner side (the second housing case 30 side) is around the EL sheet 40. -It is for illuminating a wider range by reaching the surroundings and reflecting the light again. By reflecting the light again, the illumination range of the light is expanded, and it is possible to illuminate a wide area of the first housing case. Details will be described later.

  As a method of forming the first light reflecting layer 50 and the second light reflecting layer 51, there is a method of forming a metal thin film on the second casing case by vapor deposition, sputtering, ion plating, or the like. Examples of the components of the metal thin film include reflective metals such as aluminum, gold, silver, titanium, magnesium, nickel, chromium, platinum, and rhodium, and mixtures or compounds thereof.

Next, the space 71 inside the light emitting device will be described.
In the present embodiment, a space 71 inside the light emitting device is provided between the first housing case 20 and the second housing case 30. This is because part of the light emitted from the EL sheet 40 of the second casing case 30 is reflected inward by the light reflecting decorative film 22 of the first casing case, and the first light reflecting layer 50 (reflecting) This is because it is desirable to have a certain distance in order to sufficiently diffuse the light. The space 71 inside the light emitting device may be filled with the base case molded product 21 of the first housing case 20 when the light from the EL sheet 40 can be sufficiently diffused.

Next, molding materials for the second housing case 30 (inner housing case) and the third housing case 31 that serve as the foundation of the light emitting device 10 will be described.
The molding material constituting the second housing case 30 and the third housing case 31 is not particularly limited. For example, a polymethacrylic resin such as polymethyl methacrylate, a polyolefin resin such as polyethylene, polypropylene, or polybutene, Polyvinyl chloride resins, aliphatic polyamide resins such as nylon 6 and nylon 66, aromatic polyamide resins such as polyphthalamide, polyester resins such as polyethylene terephthalate and polybutylene terephthalate, polyoxymethylene resins, polyethers Crystalline resins such as ether ketone resins and fluorine resins, polystyrene resins, polysulfone resins, polyether sulfone resins, polyphenylene ether resins, polyallelic resins, polyamideimide resins, polyetherimide resins , Acrylonitrile-styrene-based resin, an amorphous resin such as acrylonitrile-styrene-butadiene resin, aromatic polyester resin and aromatic polyester amide resin, and the like organic polymeric materials such as crystalline polymers. Moreover, the mixture which mix | blended the fillers, such as glass fiber, with the alloy of these organic polymers, or these organic polymers may be sufficient.

  Moreover, as a molding material which comprises the 2nd housing | casing case 30 and the 3rd housing | casing case 31, aluminum alloy, magnesium alloy, other metal materials, various inorganic materials, etc. may be sufficient. In the case where the metal material or various inorganic materials are powders, ceramic powder injection molding, metal powder injection molding, cemented carbide injection molding, and the like can be cited as examples of this type of powder molding method.

Next, the light reflection decorative film 22 will be described with reference to FIG. FIG. 3 is a partial cross-sectional view of the first housing case 20 (enlarged view of a portion A surrounded by a dotted line in FIG. 2).
As described above, the first housing case 20 is obtained by forming the light reflection decorative film 22 on the base case molded product 21 formed from the transparent resin serving as the base. Furthermore, as shown in FIG. 3, the light reflecting decorative film 22 (light diffusing member) has a bonding layer 22 a, a light scattering layer 22 b, and a decorative layer 22 c sequentially stacked from above the base material case molded product 21. Is. That is, the light reflection decorative film 22 is obtained by sequentially laminating the decorative layer 22c, the light scattering layer 22b, and the bonding layer 22a from the design surface side (outside of the housing case).

The decorative layer 22c functions to enhance the appearance of the light-emitting device 10, and has a color, a pattern, smoothness, and the like determined according to the use of the light-emitting device 10. In the present embodiment, it is desirable that the decorative layer 22c be a decorative with a concealing property so that the inside of the case cannot be seen.
The decorative layer 22c is usually formed by printing such as offset printing, gravure printing, or screen printing. The decorative layer 22c is configured by appropriately combining a light-transmitting decorative layer and a light-shielding decorative layer (for example, the light-shielding member 70). As a constituent material of the decorative layer 22c, thermoplastic resin, heat Examples thereof include a curable resin and an ultraviolet curable resin. For example, polyvinyl chloride resin, polystyrene resin, polyamide resin, polyolefin resin, cellulose resin, polyester resin, polyacrylic resin, polyurethane resin, polyvinyl acetal resin, polyester urethane resin, cellulose ester resin Examples of the resin include resins and alkyd resins. In addition to the resin printing, the decorative layer 22c may be formed of a metal thin film, or a combination of a resin layer and a metal thin film by printing.

The light scattering layer 22b is a layer that serves to divide the light from the EL light source (EL sheet 40, light emitting member) into, for example, transmitted light, scattered light, and reflected light.
The light scattering layer 22b is made of a resin including a light scattering component 23 having an effect of irregularly reflecting (scattering) light from the EL light source. The light scattering component 23 may be a light reflection component having an effect of reflecting light from the EL light source. Examples of the light scattering component 23 include inorganic particles, organic particles, and bubbles. Suitable examples of the inorganic particles include glass, silica, alumina, talc, zirconia, barium sulfate, titanium oxide, magnesium sulfate, magnesium carbonate, and calcium carbonate. Suitable examples of the organic particles include polyacrylic resin, organic silicone resin, polystyrene resin, polyolefin resin, polyester resin, urea resin, formaldehyde condensate, and fluorine resin. The shape of the light scattering component 23 is not particularly limited as long as it has a role of scattering light, but it is desirable that the surface of the light scattering component 23 has at least a spherical portion or a spherical shape. Further, by agglomerating the spherical light scattering component 23, a uniform light scattering effect without directionality can be obtained. The particle diameter of the light scattering component 23 is preferably about 0.1 to 0.2 mm. In addition to the resin layer containing the light scattering component, the light scattering layer 22b may be made of a metal thin film having both an effect of reflecting light and an effect of transmitting light. The ratio of light reflection and transmission is preferably 50:50 to 30:70. Examples of the film forming method include vapor deposition, sputtering, and ion plating. Examples of the components of the metal thin film include reflective metals such as aluminum, gold, silver, titanium, magnesium, nickel, chromium, platinum, and rhodium, and mixtures or compounds thereof.

  Examples of the resin for constituting the light scattering layer 22b include polyvinyl chloride resin, polystyrene resin, polyamide resin, polyolefin resin, cellulose resin, polyester resin, polyacrylic resin, polyurethane resin, and polyvinyl acetal. Resin, polyester urethane resin, cellulose ester resin, alkyd resin and the like, and the light scattering component described below is used, for example, uniformly mixed with the resin. In addition, when using the said metal thin film for the light-scattering layer 22b, the said resin can be abbreviate | omitted.

In addition, by providing the bonding layer 22a on the lowermost layer surface, it is easy to bond to the base case molded product by welding or the like during molding, and the bonding force is improved.
The bonding layer 22 a functions to bond the light reflecting decorative film 22 to the surface of the base case molded product 21, and is a material that can be fused or adhered according to the constituent material of the base case molded product 21. For example, an adhesive such as a chemical adhesive or a heat-sensitive adhesive or a pressure-sensitive adhesive. For example, resin adhesives or adhesives using thermoplastic resins such as polyacrylic resins, polyvinyl acetate resins, polyester resins, polyester resins, polyamide resins, natural rubber, chloroprene rubber, acrylonitrile butadiene rubber And rubber-based resin adhesives such as styrene-butadiene rubber and urethane rubber. These adhesives or pressure-sensitive adhesives are prepared by dissolving one or more of them in an appropriate solvent and applying them to the light scattering layer 22b by a method such as gravure coating, roll coating, or blade coating. It is formed. The heat-sensitive adhesive has a good affinity with the material of the base material case molded product 21 described above and is composed of a resin that can be welded to the melt of the material of the base material case molded product 21. It is done. The layer thickness of the bonding layer 22a is preferably about 0.1 mm to 1 mm. The constituent material type, coating method, and film thickness of the bonding layer actually used are arbitrarily selected in consideration of the material of the transfer object, the quality after transfer, reliability, and the like. In addition, when the constituent material of the light-scattering layer 22b is excellent in adhesiveness with the base material case molded product 21, the joining layer 22a can be omitted.

  Next, the EL sheet 40 will be described with reference to FIG. FIG. 4 is an enlarged cross-sectional view of the EL sheet 40. An EL (electroluminescence) element is a surface light emitting element that emits light when a voltage is applied to a phosphor dispersed in a high dielectric constant binder, and an EL sheet is a sheet-like EL element. The EL sheet 40 is not particularly limited as long as it has an EL layer 42 that includes EL elements and emits light uniformly over the entire surface. For example, as shown in FIG. 4, the EL sheet 40 has an EL sheet bonding layer 43 having a function of bonding to the surface of the second housing case, an EL layer 42 as a light emitting source, and a protective layer 41 made of a transmissive substrate. It is a laminated one. The EL layer 42 is composed of at least a transparent electrode layer 42a, a light emitting layer 42b, a dielectric layer 42c, a back electrode layer 42d, and an insulating layer 42e, and a voltage is applied by the transparent electrode layer 42a and the back electrode layer 42d. The light emitting layer 42b emits light. A battery or the like for supplying voltage may be installed in the space 72 inside the housing case, or may be supplied from the outside.

  Next, a lighting method of the light emitting device according to this embodiment will be described. FIG. 5 is an explanatory view showing an illumination method of the light emitting device according to this embodiment, and is an enlarged cross-sectional view of a part of FIG. 2 (part B surrounded by a dotted line in FIG. 2). The light irradiated from the EL sheet 40 that is an illuminating device has its optical path changed in, for example, the transmitted light 61 that travels linearly and projects outside, and the light scattering layer 22b in the light reflecting decorative film 22 described above. The light is divided into scattered light 62 projected outside and reflected light 63 reflected by the light scattering layer 22b. Since the transmitted light 61 and the scattered light 62 are projected from the surface of the first casing case 20 to the outside of the casing, the wide area of the first casing case 20 can be illuminated uniformly. Further, the reflected light 63 reflected by the light reflecting decorative film 22 is the first light reflecting layer 50 formed on the surface of the EL sheet 40 or the first light reflecting layer 50 formed on a part of the surface of the second housing case 30. The above reflection is repeated until it is reflected again by the second light reflecting layer 51 and projected outside the first housing case 20.

In the present embodiment, an inclined portion 52 that inclines the end of the second light reflecting layer 51 and reflects the reflected light is provided. By having the inclined portion 52, the shape of the second housing case 30 on the design surface side is a bowl shape. By tilting the end portion of the second light reflecting layer 51 as an inclined portion, a part of the reflected light 63 reflected from the second light reflecting layer 51 can be collected. It becomes possible to brighten the periphery (end part) of. In other words, it is possible to prevent the periphery of the first housing case 20 from becoming darker than the central portion. The magnitude of the inclination angle θ, which is the inclination angle between the surface of the second housing case 30 and the inclined portion, is preferably 90 degrees or more and 180 degrees or less, but may be 90 degrees or less.
FIG. 6 shows another example of the second housing case 30.
In this embodiment, in FIG. 1B, the inclined portion 52 is provided in accordance with the rectangular EL sheet 40 shape, but as shown in FIG. 6A, it is matched with the shape around the second housing case. In addition, the inclined portion 52 may be provided so that the end portion has a tongue shape, and the long side end portion of the EL sheet is provided at both ends in the long side direction of the second housing case as shown in FIG. The inclined portion 52 may be provided so as to be in parallel with each other.

  Further, in FIG. 5, by partially changing the distance H between the first housing case 20 and the second housing case 30, the diffusion state by the first light reflecting layer 50 or the second light reflecting layer 51 is changed. You can change it.

  Moreover, since the decoration layer 22c in the said light reflection decoration film 22 can partially block the light from a light source by decorating with a coloring agent (light-shielding member 70) with a light-shielding property. The illumination pattern can be diversified by the light shielding pattern. FIG. 7 shows a plan view of a light-emitting device 10 with a pattern as an example of creating a pattern (light-shielding pattern) on the surface of the first housing case 20 using a light-shielding colorant (light-shielding member 70). .

  The illuminated decorative molded product (light emitting device) of the present embodiment includes a first housing case (outer housing case) and a second housing case (inner housing) formed inside the first housing case. And an illumination device (light emitting member) is provided between the first casing case and the second casing case along the surface side of the second casing case. The body case is made of a light transmissive resin, and a light diffusing member is formed on the surface thereof, and a light reflecting member (reflecting member) is formed on the inner side of the light diffusing member.

  Further, the light emitted from the illumination device (light emitting member) travels linearly along the optical path and is transmitted to the outside, scattered light that is changed by the optical diffusion member and projected to the outside, and the light Reflected light is reflected inward by the scattering member, and the transmitted light and scattered light are projected from the surface of the first housing case to the outside, so that a wide area becomes visible.

  The reflected light is reflected by the light reflecting member in the direction of the first housing case, and the light becomes light emitted from an illumination device (light emitting member).

  The first casing case is characterized in that a pattern other than the pattern is illuminated by providing a pattern with a light shielding member in a part thereof.

  The light scattering member is included in a light reflection decorative film (light diffusion member) provided on the design side surface of the first housing case.

  The light reflection decorative film includes a decorative layer, a scattering layer, and a bonding layer that can be welded to the surface of the first casing case.

  The light reflecting decorative film includes a decorative layer and a scattering layer that can be welded to the surface of the first housing case.

  The scattering layer includes a light scattering component that scatters light from a light source.

  The scattering layer includes a reflection component that reflects light from a light source.

  The scattering layer includes one or both of a light scattering component that scatters light from a light source and a reflection component that reflects light from a light source.

  It is a light emitting member EL (Electro Luminescence) element of the illumination device.

  The light reflecting member is formed on one of or both of the illumination device and the second casing case.

  The light reflecting member has a mirror surface.

  The illumination structure of the light emitting device according to the present embodiment has a two-layer structure of a light emitting device on the side to be illuminated, a first housing case (outer housing case) and a second housing case (inner housing case), Since the EL sheet (light emitting member), which is an illumination device having at least an EL layer formed between the two cases, is laminated on the design side surface of the second housing case, the design surface shape restriction and the light emitting device The unit, module, and component mounting restrictions installed inside (the space 72 inside the housing case) are small, and the EL sheet (light emitting member) can be reused when the molded product is defective.

  In addition, a light diffusing member is provided on the surface of the first casing case, and a reflecting member is provided on the inner side of the light diffusing member, so that light emitted from an EL light source of an EL sheet (light emitting member) is diffused in the light. Since it is diffused by the member and the reflecting member, it is possible to enlarge the illumination range of the light emitted from the EL light source and illuminate a wide area of the first housing case.

  Since the illuminated decorative molded product (light emitting device) according to the present embodiment has the above-described characteristics, there are few restrictions due to the surface shape of the housing case, and it is possible to uniformly illuminate a wide area of the housing case. The effect is that it can give a new design. Furthermore, since there is no shape restriction inside the housing case, there is an effect that the strength reduction of the housing case can be prevented.

Embodiment 2. FIG.
The second embodiment will be described with reference to the drawings.
FIG. 8 is a cross-sectional view showing another example of the light-emitting device 10 that is an illuminated decorative molded product according to the second embodiment. Hereinafter, parts different from the first embodiment will be described. In Embodiment 2, the end of the design-side surface of the second housing case 30 that is the surface to which the EL sheet 40 is bonded is a parabolic curved surface, and the EL sheet 40 is the surface of the second housing case 30. It is formed along the top. Further, the light reflecting decorative film 22 is formed on the surface of the first housing case 20, and the first light reflecting layer 50 is formed on the surface of the EL sheet 40. Other configurations are the same as those of the first embodiment described above. The same.

  As in the second embodiment, the light emitted from the EL light source (EL layer 42, light emitting layer 42b) is converted into the method of the EL sheet 40 by bending the end of the EL sheet 40 in accordance with the second housing case 30. Since the illumination is performed in the linear direction, the illumination range is widened, and the first housing case 20 in a wider area can be illuminated than in the case of the first embodiment.

  As described above, the first and second embodiments of the present invention have been described in detail for the light emitting device that is an illuminated decorative molded product, and the illumination structure and the illumination method thereof. However, the present invention is not limited to these embodiments. However, the present invention includes various modifications in accordance with the problem of the present invention and the spirit of the solution. For example, although a light reflection decorative film is used as an example of the light scattering member of the present invention, a shape other than the film may be suitable as the light scattering member depending on the shape and use of the molded product of the present invention.

It is a figure which shows the external appearance of the light-emitting device which is the illumination type decorative molded product which concerns on Embodiment 1, (a) is a top view, (b) is a top view of a 2nd housing | casing case. It is sectional drawing of an example of the light-emitting device which is an illumination type decorative molded product which concerns on Embodiment 1. FIG. FIG. 3 is a partial cross-sectional view (an enlarged view of a portion A surrounded by a dotted line in FIG. 1) of the first housing case of the light emitting device according to Embodiment 1. 2 is a cross-sectional view of an EL sheet according to Embodiment 1. FIG. FIG. 6 is a diagram (an enlarged view of B in FIG. 1) for explaining an illumination method of the light-emitting device according to Embodiment 1. FIG. 10 is a plan view showing another example of the second housing case of the light emitting device according to Embodiment 1. It is explanatory drawing of the illumination pattern shown by the light-shielding pattern by the light-shielding member of Embodiment 1, and is a top view of a light-emitting device. It is sectional drawing which showed another example of the light-emitting device which is an illumination type decorative molded product which concerns on Embodiment 2. FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Light-emitting device, 20 1st housing | casing case, 21 base material case molded article, 22 light reflection decoration film, 22a joining layer, 22b light scattering layer, 22c decoration layer, 23 light scattering component, 30 2nd housing case , 31 Third housing case, 40 EL sheet, 41 Protective layer, 42 EL layer, 42a Transparent electrode layer, 42b Light emitting layer, 42c Dielectric layer, 42d Back electrode layer, 42e Insulating layer, 43 EL sheet bonding layer, 50 1st light reflection layer, 51 2nd light reflection layer, 61 Transmitted light, 62 Scattered light, 63 Reflected light, 70 Light-shielding member.

Claims (11)

An inner housing case,
A light emitting member that is provided outside the inner housing case and emits light;
A reflecting member that is provided outside the light emitting member, transmits the light emitted from the light emitting member, transmits the incident light to the outside, and reflects the light incident from the outside;
An outer casing case provided outside the reflecting member, the outer case having a light diffusing member that diffuses and outputs the incident light that is incident on the light transmitted by the reflecting member and the light reflected by the reflecting member A light emitting device comprising a housing case.   The light emitting device according to claim 1, wherein the outer casing case includes at least a light shielding member that shields light.   The light emitting device according to claim 1, wherein the light emitting member includes an EL layer including an EL (Electro Luminescence) element.   The light-emitting device according to claim 1, wherein the light diffusion member includes a light scattering component that diffusely reflects light. The outer casing case is
It consists of a base material case molded product that shapes the light diffusing member and the shape of the outer casing case,
The light diffusing member is
A decorative layer having at least part of a light-shielding member that blocks light;
The light emitting device according to claim 1, comprising: a scattering layer including a light scattering component that diffusely reflects light. The light diffusing member is
6. The light emitting device according to claim 5, further comprising a bonding layer that bonds the scattering layer and the base case molded product.   The light-emitting device according to claim 1, wherein the reflecting member has a mirror surface on the outside.   The light-emitting device according to claim 1, further comprising a peripheral reflection member that is provided around the light-emitting member and reflects light incident from the outside.   9. The light emitting device according to claim 8, wherein the peripheral reflection member has a mirror surface on the outside.   The light emitting device according to claim 1, wherein the light emitting device is an exterior case of a mobile phone. A part of the light emitted by the light emitting member is transmitted through the outer casing case and projected to the outside.
A part is diffused by the light diffusing member of the outer casing case and projected to the outside of the outer casing case,
Illumination of a light emitting device characterized in that a part of the light is reflected inward by a light diffusing member of the outer casing case, and further, reflection is repeated by the reflecting member until it is transmitted and diffused through the outer casing case and projected outside. Method.