JP2019184906A - Light emitting device, and manufacturing method of light emission member - Google Patents

Abstract

To provide a light emitting device, and a manufacturing method of a light emission member that reduce the thickness of a light emitting device and decrease the man hour as munch as possible, and can make an impression during the light emission of the light emitting element.SOLUTION: The light emitting device includes: a substrate portion for emitting a mounted light emitting element with a supplied electric power; a first reflective layer (21) capable of reflecting the light that has passed through display information (M1, M2, and M3) from the outside and has been reflected to the display information; a second reflective layer (23) that has display information displayed by the light received from the light emitting element, adheres to a shield layer (24) for blocking the transmission of the light, and can reflect the light; and a light guide member (22) that guides the light of the light emitting element and adheres to the first reflective layer and second reflective layer.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a light-emitting device that uses a light-emitting element as a light source to display patterns, characters, and the like and a method for manufacturing a light-emitting member.

Conventionally, a high-intensity LED has been used for a light-emitting element as a light source with low power consumption and high luminance, and a light-emitting device and an illumination device using the high-intensity LED have been proposed. The light-emitting device using the high-intensity LED is a light-emitting device that is used as a decoration as a part of the interior of a car, in addition to an illumination device used for illumination of an inspection device or a ceiling surface or a wall surface of a building. Has been proposed.
As a light emitting device, a light emitting device has been proposed that uses a half mirror to project a drawn pattern, characters, etc., and use it as a decoration.

  For example, Patent Document 1 discloses that a light source member, a mirror surface member disposed on the back side, a part disposed on the front side, a part of the traveling light is transmitted and emitted from the upper surface side, and other light A half mirror that reflects in the back direction, a cylindrical outer peripheral frame that supports the mirror member on the back side, supports the half mirror on the front side, and forms a space between the mirror member and the half mirror, Between the mirror surface member and the half mirror, a concave portion formed along the inner periphery of the outer peripheral frame and formed at least at a part on the outer peripheral surface side, and a first reflecting member disposed in the concave portion. And a light guide member.

JP, 2015-18014, A

However, the conventional light-emitting device includes a light-emitting portion on the side surface, the inner side surface is illuminated by the light-emitting element, and the emitted side surface is reflected multiple times to shine as a pattern. In addition, a space is provided between the surface on which the half mirror is mounted and the mirror to display information above the mirror. For this reason, there is a concern that providing the space increases the thickness of the device.
For example, as shown in FIG. 10, a light emitting device using a mirror 324 and a half mirror 321 is processed into a full mirror in advance when a light guide plate 322 is sandwiched between them and transfer or engraving 326 is performed on the mirror 324 in advance. There is a problem in that it requires a lot of processing steps and costs. In addition, as shown in FIG. 10, the deposition layer 324 is shaved (FIG. 10 (location 323)) and the pattern 328 is formed, so that light is lost from the shaved location 323, resulting in an increase in light loss. At the same time, even when the light emitting element is not turned on, there is a problem that light from outside light is reflected, the pattern 328 is reflected thinly, and the impression at the time of lighting is blurred.

  An object of the present invention is to provide a light-emitting device and a method for manufacturing a light-emitting member capable of giving an impression when a light-emitting element emits light by reducing the thickness of the light-emitting device and reducing the number of steps as much as possible.

  A substrate portion that emits light from a light emitting element mounted with supplied power, a first reflective layer that can transmit display information from outside and reflect light reflected on the display information, and light from the light emitting element Receiving and displaying the display information and closely contacting with a shielding layer that blocks light transmission; reflecting a second reflecting layer capable of reflecting light; guiding light of the light emitting element; and And a light guide member that is in close contact with the second reflective layer.

  With the above features, the present invention makes it possible to clearly highlight the light and darkness of the light emitting element during light emission by preventing the light from being transmitted through the second reflective layer. There is an effect to.

It is the perspective view which mounted | wore the motor vehicle with the light-emitting device of embodiment. It is a perspective view of the whole light-emitting device of an embodiment. It is the perspective view which exploded and showed the light-emitting device of embodiment. It is the top view showing the light emission part of the light-emitting device of embodiment. It is a perspective view showing the components which decomposed | disassembled the light emission part of the light-emitting device of embodiment. It is an expanded sectional view showing AA sectional view of Drawing 4 showing the light emitting part of an embodiment. It is explanatory drawing which shows a mode that the light-emitting device of embodiment light-emitted. It is a schematic diagram showing signs that a light emitting part of an embodiment is manufactured. It is a schematic diagram showing other embodiments of an embodiment by sectional view. It is explanatory drawing shown with sectional drawing of the conventional light emission part.

  A light emitting device and a manufacturing method thereof according to the present invention will be described in detail with reference to the drawings. It should be noted that the embodiments and drawings described below exemplify a part of the embodiments of the present invention, and are not used for the purpose of limiting to these configurations, and do not depart from the gist of the present invention. Can be changed as appropriate.

Example 1
With reference to FIG. 1, a state when the light emitting device 10 is mounted on the automobile C will be described. FIG. 1 is a perspective view in which the light emitting device 10 of the embodiment is mounted on an automobile C. FIG. As shown in FIG. 1, a light emitting device 10 used for the interior of an automobile C is shown. In particular, in this embodiment, the light emitting device 10 is arranged on the door side surface 3 that is the side surface of the door 2 of the automobile C, and the light emitting device 10 emits light. The light emitting device 10 can emit different patterns M1, M2, and M3 by causing the light emitting element 31 (FIG. 3) provided therein to emit light.
The patterns M1, M2, and M3 are not limited to figures, and may be logo marks, characters, symbols, or the like, or may be displayed in combination. The light-emitting device 10 can be used as a decorative light-emitting display near the emblem or step of the automobile C.

Next, the structure of the light emitting device 10 will be described with reference to FIGS. FIG. 2 is a perspective view of the entire light emitting device 10 according to the embodiment. FIG. 3 is an exploded perspective view of the light emitting device 10 according to the embodiment.
As shown in FIGS. 2 and 3, the light emitting device 10 has a light emitting unit 20 fixed by an upper housing 11 and a lower housing 13. The light emitting device 10 incorporates a substrate portion 30 including a substrate 32 on which a light emitting element 31 that receives light from the side surface of the light emitting portion 20 is mounted on one side. Although the light emitting element 31 uses an LED element, it may be an organic EL, a cold cathode tube, or the like that can receive light from the side surface of the light emitting unit 20. Further, the light emitting element 31 may be a light emitting element capable of producing not only a single color but also a full color. The substrate unit 30 is mounted only on one side, but may be provided on other side surfaces as appropriate in accordance with the length of the light emitting unit 20 and the light amount of the light emitting element 31.

Further, the upper housing 11 covering the light emitting unit 20 includes a cutout portion 12 cut out in a square shape so that the patterns M1, M2, and M3 of the light emitting unit 20 can be visually recognized. Further, the lower housing 13 has a larger plate shape than the light emitting unit 20 so that the light emitting unit 20 can be supported. The upper housing 11 and the lower housing 13 may be formed of a material such as resin or metal and have rigidity that can support the light emitting unit 20 and the substrate unit 30.
As shown in FIG. 2, patterns M1, M2, and M3 printed on the light emitting unit 20, which will be described later, are reflected multiple times by the half mirror layer 21 (FIG. 5) and the half mirror layer 23 (FIG. 5), and the patterns M1, M2 are reflected. M3, M1a, M1b, M1c, M1d, M1e, M2a, M2b, M2c, M2d, M2e, M3a, M3b, M3c, M3d, and M3e are projected.

Next, the light emitting unit 20 will be described in detail with reference to FIGS. FIG. 4 is a plan view showing the light emitting unit 20 of the light emitting device 10 according to the embodiment. FIG. 5 is a perspective view illustrating components obtained by disassembling the light emitting unit 20 of the light emitting device 10 according to the embodiment. FIG. 6 is an enlarged cross-sectional view showing the AA cross-sectional view of FIG. 4 showing the light emitting unit 20 of the embodiment.
The light emitting unit 20 is integrally formed by a manufacturing method described later, but FIG. 5 shows each component part in an exploded manner. The light emitting unit 20 includes half mirror layers 21 and 23 formed by depositing a reflecting member that forms a mirror surface on the uppermost part and the intermediate part to form a half mirror and a film.

In addition, patterns M1, M2, and M3 are printed on the lower half mirror layer 23 by ink jet printing or silk printing. The patterns M1, M2, and M3 can be printed in white or according to the preference of each color. If the pattern M1, M2, and M3 are printed with ink containing a fluorescent paint or a reflective material, the light emitting element 31 emits light and the color is further improved. The shielding layer 24 facing the half mirror layer 23 is a layer that is in close contact with the half mirror layer 23 by a black film or black printing. The shielding layer 24 has a function of preventing the light transmitted to the half mirror layer 23 from being lost, and when the micro-raise is contained in the integrally molded resin, even if it is reflected whitish, the pattern MH1, M2, M3 from black It has a function that allows shadows to be clearly projected.
As described above, the half mirror layers 21 and 23 can be reduced in cost by using the same product.
The half mirror layer 23 may be configured as a film-like or plate-like layer in which a reflective member such as silver or tin that forms a mirror surface is deposited to form a full mirror.

  The light guide member 22 is made of a transparent resin through which light from the light emitting element 31 can pass. For example, in addition to a methacrylic resin such as methyl methacrylate or ethyl methacrylate, an acrylic such as methyl acrylate or ethyl acrylate. Various materials such as resin-made, polycarbonate, polyethylene, and glass can be used. The light guide member 22 is not particularly limited as long as it is a highly transparent material.

Next, the formation of the patterns M1, M2, and M3 will be described with reference to FIGS. FIG. 7 is an explanatory diagram illustrating a state where the light emitting device 10 of the embodiment emits light. Light H1 emitted from the light emitting element 31 to the substrate 32 supplied with power is guided in the light guide member 22 and reflected by the printed pattern M1. The reflected light H2 is reflected in multiple in the half mirror layers 21 and 23 to project virtual images of M1a, M1b, M1c, M1d, and M1e. Therefore, the light emitting unit 20 is formed with multiple patterns M1a, M1b, M1c, M1d, and M1e having a depth. In addition, the shielding layer 24 prevents the light from being transmitted by the half mirror layer 23, thereby making it possible to clearly highlight the light and darkness of the light emitting element 31 during light emission, and has the effect of enhancing the impression during light emission.
Further, the distance between the virtual images M1a, M1b, M1c, M1d, and M1e (FIG. 2) varies depending on the distance H2 (the distance between the arrows) shown in FIG. 7, that is, the thickness of the light guide portion. From the above, by changing the thickness, it is possible to adjust the interval between the virtual images M1a, M1b, M1c, M1d, and M1e (FIG. 2) to be projected.

(Manufacturing method of light emitting part)
Next, an example in which the light emitting unit 20 is manufactured by so-called double-in-mold molding will be described with reference to FIG. FIG. 8A is a schematic diagram showing a state when the resin forming the light emitting unit 20 is filled, and FIG. 8B is a schematic diagram showing a state when the light emitting unit 20 is released. .
As shown in FIG. 8A, first, the first transfer film 27 forms a film-like half mirror layer 21 on which silver or tin for transfer is deposited. Similarly, the second transfer film 28 is laminated on the half mirror layer 23 and the half mirror layer 23 on which the film-like patterns M1, M2, and M3 on which transfer silver or tin is vapor-deposited are printed. A printed or colored shielding layer 24 is formed.
The first transfer film 27 and the second transfer film 28 are wound around the first roller 54 and the second roller 55 so that mass production is possible at the time of manufacture, and the first transfer film 27 and the second transfer film 27 are formed at the time of molding. The second transfer film 28 moves.

The first transfer film 27 and the second transfer film 28 are arranged so as to face each other and face each other in the fixed mold 51 and the moving mold 52. The fixed mold 51 and the movable mold 52 are clamped in preparation for filling the resin with the first transfer film 27 and the second transfer film 28 sandwiched therebetween. The space between the first transfer film 27 and the second transfer film 28 in the fixed mold 51 and the moving mold 52 that are clamped is filled with a light transmissive resin from the port 53.
The thickness of the light guide member 22 is determined by the thickness of the space to be filled, and in this embodiment, the thickness is 3 mm. This thickness can be changed as appropriate, and a thickness of 0.5 mm to 10 mm is most suitable as a multi-reflective decorative member.

When filling of the fixed mold 51 and the moving mold 52 with the resin is completed, the moving mold 52 moves and the first transfer film 27 and the second transfer film 28 as shown in FIG. 8B. Is released, the half mirror layer 21 and the patterns M 1, M 2, and M 3 are printed on the light emitting unit 20, and the half mirror layer 23 is integrally formed on the light guide member 22 with the black-printed shielding layer 24.
Thus, since the light emitting part 20 decorated at a time is formed in a large amount, the number of processes can be reduced and the manufacturing cost can be reduced. Further, it is possible to manufacture a device having a thin light emitting device 10 as a whole.

  The light guide part is first manufactured by double in-mold molding in which resin is poured between the half mirror layer 21 and the half mirror layer 23 or the full mirror, and then the half mirror layer 23 or the full mirror is engraved with a laser or engraving machine. After forming M1, M2, and M3, the shielding layer 24 may be manufactured by performing black printing or painting.

(Example 2)
Next, a light emitting unit 120 according to another embodiment will be described with reference to FIG. The light emitting unit 120 is a light emitting unit 120 in which a pattern visually recognized from both sides can be clearly raised by sandwiching a shielding layer 224 in an intermediate part.
The light emitting unit 120 has a half mirror layer 121 on the upper side and a light guide member 122 on the lower side. And the light emission part 120 has the half mirror layer 123 which printed the pattern M2 and M3 under the light guide member 122, and the black shielding layer 224 is printed.
The light emitting unit 120 includes a half mirror layer 223 printed with patterns M1 and M2 below the shielding layer 224, and a light guide member 222 below the half mirror layer 223. Further, the light emitting unit 120 has a half mirror layer 221 below the light guide member 222.

The light emitting unit 120 can be integrally formed by filling the resin by performing the in-mold molding described above twice. Therefore, since the light emitting part 120 decorated at a time is formed in a large amount, the number of processes can be reduced and the manufacturing cost can be reduced. Further, it is possible to manufacture a device having a thin light emitting device 10 as a whole.
Further, the shielding layer 224 prevents the light reflected by the patterns M1, M2, and M3 from being transmitted, thereby making it possible to clearly highlight the light and darkness of the light emitting element (not shown) during light emission, thereby enhancing the impression during light emission. effective.

(Technical features)
An example of technical features of the present embodiment is shown in parentheses in the following, but is not particularly limited but illustrated, and effects that can be considered from these features are also described.

<First feature point>
A substrate part (for example, mainly the substrate part 30) that emits light emitting elements (for example, mainly the light emitting element 31) mounted by the supplied power, and display information (for example, mainly patterns M1, M2, and M3 from the outside). ) And can reflect the light reflected on the display information (for example, mainly half mirror layers 21, 121, and 221), and the display that receives and displays the light from the light emitting element. A second reflective layer (for example, mainly half-mirror layers 23, 123, and 223) that provides information and is in close contact with a shielding layer that blocks light transmission (for example, mainly the shielding layers 24 and 224) and can reflect light. And a light guide member (for example, mainly light guide members 22, 122, 222) that guides light of the light emitting element and is in close contact with the first reflective layer and the second reflective layer. Features.

  With the above features, the present invention makes it possible to clearly highlight the light and darkness of the light emitting element during light emission by preventing the light from being transmitted through the second reflective layer. There is an effect to.

<Second feature>
The first reflective layer and the second reflective layer are formed of a film-like half mirror.
Due to the above characteristics, the present invention can reduce the cost by using the same material for the first reflective layer and the second reflective layer. Moreover, a thinner light-emitting device can be formed by forming a film.

<Third feature point>
The first reflective layer is formed of a film-like half mirror, and the second reflective layer is formed of a film-like full mirror.
Due to the above characteristics, the present invention has a light transmission rate lower than that of a half mirror in a full mirror. Therefore, the loss of light emitted from a light emitting element is reduced, and a virtual image of information display can be clearly confirmed. is there.

<Fourth feature point>
The display information and the shielding layer are formed by printing.
With the above features, the present invention can simplify the manufacturing process and form a thin light-emitting device.

<Fifth feature point>
The shielding layer is colored black.
With the above features, the present invention can perform a shielding function and can clearly display shadows of display information.

<Sixth feature point>
A light emitting section (for example, mainly light emitting sections 20 and 120) in which the first reflective layer and the second reflective layer including the display information are integrally formed by the light guide member cured with resin. It is characterized by having.
With the above features, the present invention can form a thin light-emitting portion, and at the same time can be formed by a simplified manufacturing process, so that the number of work processes can be reduced.

<Seventh feature point>
The first reflecting member (for example, mainly the half mirror layer 21) that can be released from the mold and can transmit light and can reflect the light reflected on the display information (for example, mainly the patterns M1, M2, and M3). A first sheet forming step formed on one sheet (for example, mainly the first transfer film 27) and a second reflecting member (for example, mainly a half mirror layer) that can be released and can reflect light. 23) is formed on a second sheet (for example, mainly the second transfer film 28), a softened resin is filled between the first sheet and the second sheet, and the light emitting device (For example, a light guide member forming step for forming a light guide member (for example, mainly the light guide member 22) for guiding light from the light emitting element 31), the first sheet and the resin after the resin is cured The mold is released from the second sheet, and the light emitting part (for example, the light emitting part 2 is mainly used). ) And the light emitting portion forming step of taking a, characterized in that it consists of.
Due to the above characteristics, the present invention can form the light emitting part with the thinned light emitting part, and can form the light emitting part with a simplified manufacturing process.

<Eighth feature point>
It includes a winding step of winding and moving the first sheet and the second sheet by first and second rollers (for example, mainly the first roller 54 and the second roller 55).
With the above features, the present invention can be mass-produced and can be manufactured at high speed and with a light emitting part.

<Ninth feature point>
The second sheet forming step includes a display information printing step of printing the display information on a surface of the second sheet.
With the above features, the present invention can produce display information in large quantities at low cost by printing on the second sheet. In addition, according to the present invention, it becomes easy to manufacture a thin light emitting portion by printing.

<Tenth feature point>
The second sheet forming step includes a shielding layer printing step of printing a shielding layer (for example, mainly the shielding layer 24) on the back surface of the second sheet.
With the above features, the present invention can perform the shielding function by the shielding layer and can clearly display the shadow of the display information. Further, according to the present invention, it is possible to produce display information in large quantities at a low cost by printing on the second sheet. Furthermore, according to the present invention, it becomes easy to manufacture a thin light emitting part by printing.

  It can be used not only as a light-emitting device for automobile decoration, but also as a light-emitting device for decoration of outdoor and indoor commercial facilities, light-emitting devices for freezers and showcases for decoration, and light-emitting devices for decoration in libraries and museums. It is.

2 ... door, 3 ... door side surface, 10 ... light emitting device, 11 ... upper housing, 13 ... lower housing,
20.120 ... light emitting part, 21.23.121.123.221.223 ... half mirror layer,
22 · 122 · 222 ... light guide member, 24 · 224 ... shielding layer, 27 ... first transfer film, 28 ... second transfer film, 30 ... substrate portion, 31 ... light emitting element, 32 ... substrate,
51 ... Fixed mold, 52 ... Moving mold, 53 ... Port, 54 ... First roller, 55 ... Second roller,
C ... car, M1 / M2 / M3 ... pattern,
M1 (a, b, c, d, e), M2 (a, b, c, d, e), M3 (a, b, c, d, e) ... virtual images.

Claims (10)

A substrate part that emits light from the mounted light emitting element by the supplied power;
A first reflective layer capable of reflecting light transmitted from outside and reflected by the display information;
A second reflection layer that provides the display information to be displayed by receiving light from the light emitting element, is in close contact with a shielding layer that blocks light transmission, and can reflect light;
A light guide member that guides light of the light emitting element and is in close contact with the first reflective layer and the second reflective layer;
A light-emitting device comprising:   The light emitting device according to claim 1, wherein the first reflective layer and the second reflective layer are formed of a film-like half mirror.   2. The light emitting device according to claim 1, wherein the first reflective layer is formed of a film-like half mirror, and the second reflective layer is formed of a film-like full mirror.   The light emitting device according to claim 1, wherein the display information and the shielding layer are formed by printing.   The light emitting device according to any one of claims 1 to 4, wherein the shielding layer is colored black.   The light emitting part which integrally formed the said 1st reflection layer and the said 2nd reflection layer containing the said display information with the said light guide member which hardened resin is provided. The light emitting device according to claim 5. A first sheet forming step of forming a first reflecting member on the first sheet, which can be released from the mold and is capable of transmitting and reflecting light reflected on display information;
A second sheet forming step of forming a second reflecting member on the second sheet, which can be released from the mold and can reflect light;
A light guide member forming step of filling a softened resin between the first sheet and the second sheet and forming a light guide member that guides light from the light emitting element;
A light emitting part forming step of releasing the light emitting part after releasing the resin from the first sheet and the second sheet and curing the light emitting member.   The method for manufacturing a light emitting member according to claim 7, further comprising a winding step of winding and moving the first sheet and the second sheet by first and second rollers.   The light emitting member according to any one of claims 7 and 8, wherein the second sheet forming step includes a display information printing step of printing the display information on a surface of the second sheet. Production method.  The light emitting member manufacturing method according to any one of claims 7 to 9, wherein the second sheet forming step includes a shielding layer printing step of printing a shielding layer on a back surface of the second sheet. Method.

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