JP2009129546A - Light-emitting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light-emitting device capable of giving a viewer impression as if an inside of a shade member were filled with a transparent material. <P>SOLUTION: The device is provided with a transparent shade member 3 covering a light-emitting part 2, expanded from one end to the other in a given direction, having an opening 31 at the other end, with an outer face and an inner face curved, and formed so as a thickness to be increased from the one end to the other in the given direction, and an inner-face shape of the shade member 3 is made hard to be viewed from outside. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a light emitting device having a light emitting part and a shade member covering the light emitting part.

2. Description of the Related Art Conventionally, as this type of light-emitting device, there has been known a lighting fixture having a light source inside a shade as a shade member made of a transparent material opened in a substantially bowl shape (see, for example, Patent Document 1). According to Patent Literature 1, this lighting fixture has an incident surface that is substantially parallel to the axial direction of the shade that makes light from the light source incident inside the shade, and a reflection from the outer surface of the shade that is orthogonal to the incident surface. It describes that a plurality of inner ribs having an inner emission surface for emitting light are arranged side by side. And on the outside of the shade, there is an inclined reflecting surface that substantially follows the outer surface so as to substantially totally reflect light from the incident surface, and from the inclined reflecting surface that is substantially orthogonal to the axial direction of the shade that is connected to the inclined reflecting surface. It is described that a plurality of outer ribs having an outer emission surface for emitting reflected light in the axial direction of the shade are provided side by side.
JP 2003-132718 A

  By the way, in the lighting fixture described in Patent Document 1, since the inner rib is formed on the inner surface of the cap member and the outer rib is formed on the outer surface, the inner surface of the cap member is conspicuous when viewed from the outside. One can recognize at a glance that the inside of the shade member is hollow.

  The subject of this invention is providing the light-emitting device which can give an observer the impression that the inside of the shade member is filled with the transparent material.

  According to the present invention, the light emitting unit and the light emitting unit are covered, spread from one end to the other end in a predetermined direction, have an opening at the other end, the outer surface and the inner surface are curved, and the other ends from one end in the predetermined direction. There is provided a light emitting device including a transparent shade member formed to increase in thickness toward the end.

  In the light emitting device, the cap member is preferably formed in a bowl shape.

  In the light emitting device, it is preferable that the outer member and the inner surface of the shade member are formed in a parabolic shape in cross section.

  The light emitting device preferably includes a light-transmitting blocking member that blocks the other end of the shade member.

  In the light-emitting device, it is preferable that the closing member is detachable from the shade member.

  In the light-emitting device, the light-emitting unit preferably includes a transparent light guide and a light-emitting element embedded in the light guide.

  In the above light emitting device, it is preferable that a wiring for supplying power to the light emitting element is provided, and the light emitting unit is detachable from the wiring.

  In the light-emitting device, the light guide is preferably a polyhedron.

  According to the present invention, it is possible to give the viewer an impression that the inside of the shade member is filled with the transparent material.

  1 to 4 show an embodiment of the present invention, and FIG. 1 is an external perspective view of a light emitting device. For convenience of explanation, the inner surface of the shade member is indicated by a solid line in each figure. However, due to the action of refraction and the like, it is actually difficult to visually recognize the inner surface of the shade member from the outside.

  As shown in FIG. 1, the light-emitting device 1 includes a light-emitting unit 2 having an LED 21 and a transparent shade member 3 that covers the light-emitting unit 2 and extends from the upper end toward the lower end. The shade member 3 has an opening 31 formed on the other end side, and the light emitting device 1 includes a closing member 4 that closes the opening 31. The light emitting device 1 also includes a wiring 5 for supplying power to the LED element 21 and a guide member 6 that covers the wiring 5 and is inserted into the wiring hole 32 of the shade member 3.

FIG. 2 is an exploded perspective view of the light emitting device.
As shown in FIG. 2, the light emitting unit 2 includes an LED 21 and a light guide 22 that guides light emitted from the LED 21 to the outside. The light guide 22 is made of a transparent material and has a receiving hole 23 for receiving the resin sealing portion of the LED element 21. The light guide 21 is a polyhedron having a plurality of vertices at a constant distance from the center, and a receiving hole 23 is formed at the upper end. In the present embodiment, the light guide 22 is a 48-hedron in which all surfaces are equilateral triangles and the surfaces are symmetrically arranged in the vertical and horizontal directions. The light guide 22 can be made of, for example, a transparent resin such as an acrylic resin, a transparent inorganic material such as glass, or the like. In the present embodiment, the light guide 22 has a refractive index of 1.4 to 1.7. In addition, although the shape of the light guide 22 is arbitrary, what gave the predetermined cut with respect to the spherical body is preferable.

  The LED 21 is a so-called bullet-type LED, and includes a pair of lead electrodes 24 extending in parallel in a predetermined direction, and a resin sealing portion 25 formed at the tip of each lead electrode 24 to seal the LED element. In the present embodiment, the LED element is made of, for example, a GaAs material and emits orange light. Note that the material and emission color of the LED element are not limited to GaAs and orange, and for example, the material may be GaN and the emission color may be blue. When a blue LED element is used, a white LED 21 can be obtained by including a phosphor in the resin sealing portion 25.

  As shown in FIG. 2, the cap member 3 is formed in a bowl shape with the opening portion 31 below, and has a wiring hole 32 extending vertically through the guide member 6. The cap member 3 can be made of, for example, a transparent resin such as an acrylic resin, a transparent inorganic material such as glass, or the like. In this embodiment, the shade member 3 has a refractive index of 1.4 to 1.7. Further, the inside of the shade member 3 is filled with air having a refractive index of 1.0. The opening 31 has a circular shape in plan view, and the wiring hole 32 has a circular shape in top view. The cap member 3 is formed with curved inner and outer surfaces. Specifically, the thickness at the upper end is 19 mm and the thickness at the lower end is 2 mm. Thus, the cap member 3 is formed so that the thickness decreases from the upper end side toward the lower end side. A plurality of engagement holes 33 that engage with the closing member 4 are formed on the inner surface lower end side of the cap member 3. In the present embodiment, a total of three engagement holes 33 are formed on the inner surface of the cap member 3 at equal intervals in the circumferential direction.

  As shown in FIG. 2, the closing member 4 is formed in a disk shape, has translucency, and exhibits white. The blocking member 4 can be made of, for example, a translucent white resin such as an acrylic resin, a translucent white inorganic material such as glass, or the like. Since the closing member 4 has translucency, the viewer can visually recognize an image in which the light emitted from the light emitting unit 2 is reflected on the closing member 4 through the closing member 4. Three protrusions 41 are formed on the outer periphery of the closing member 4 in the circumferential direction, and each protrusion 41 engages with the engagement hole 33 of the cap member 3.

FIG. 3 is a longitudinal sectional view of the light emitting device.
As shown in FIG. 3, the wiring 5 has a connector portion 51 connected to the end portion of each electrode lead 24 of the LED 21 at the lower end. Moreover, the wiring 5 has a connector part (not shown) connected to an external power source at the upper end. The wiring 5 is covered with a covering material 52 made of, for example, stainless steel, and is provided with rigidity and strength by the covering material 52. In the present embodiment, the wiring 5 engages with a socket disposed on the ceiling surface of the house at the upper end and functions as a hanging tool for hanging the light emitting device 1 on the ceiling.

  As shown in FIG. 3, the guide member 6 is formed in a cylindrical shape and is continuously formed with the cylindrical portion 61 inserted into the wiring hole 32 of the shade member 3 and the upper end of the cylindrical portion 61, and the outer surface is directed upward. The upper portion 62 has a reduced diameter, and the flange portion 63 extends outward in the circumferential direction from the lower end of the cylindrical portion 61. The guide member 6 is made of, for example, ABS resin (Acrylonitrile Butadiene Styrene copolymer synthetic resin), and exhibits black. The cylindrical portion 61 is formed so that its outer diameter is equal to the inner diameter of the wiring hole 32 of the shade member 3 and its vertical dimension is equal to the vertical dimension of the wiring hole 32. The upper part 62 protrudes upward from the shade member 3. The flange 63 abuts against the upper part of the inner surface of the shade member 3, whereby the guide member 6 is positioned with respect to the shade member 3.

  A spacer 7 is provided between the guide member 6 and the light emitting unit 2. The spacer 7 contacts the lower surface of the flange 63 of the guide member 6 and contacts the upper portion of the light guide 22. Thereby, the light guide 22 is positioned with respect to the shade member 3 through the spacer 7. The spacer 7 is formed in a regular dodecagonal cylinder shape and covers each electrode lead 24 of the LED protruding upward from the light guide 22. The spacer 7 may have a rectangular tube shape other than a regular dodecagon tube, or a cylindrical shape. In the present embodiment, the spacer 7 is made of a transparent material, but the spacer 7 may be a colored material. The spacer 7 is made of a resin such as an acrylic resin, for example, an inorganic material such as glass.

  In the light emitting device 1 configured as described above, the cap member 3 formed in a bowl shape is formed so that the thickness decreases from the upper end side toward the lower end side. When viewed from the outside, it is difficult to visually recognize the inner surface shape of the cap member 3. This is because the shade member 3 has a higher refractive index than the gas in the hollow portion of the shade member 3. Thereby, although depending on the angle at which the light emitting device 1 is visually recognized, depending on the angle at which the light emitting device 1 is visually recognized, an impression can be given to the viewer as if the interior of the shade member 3 is filled with the transparent material. Thus, since the impression that the inside of the shade member 3 is filled with the transparent material is given to the viewer, compared with the case where the thickness of the shade member 3 is constant, the sense of quality, innocence, etc. of the light emitting device 1 is improved. It can be improved dramatically. Further, by making the inside of the shade member 3 hollow, the light-emitting device 1 can be reduced in weight and cost.

  Further, in the present embodiment, the inner surface and the outer surface of the cap member 3 are both parabolic, so that the shape is relatively approximate, and the surface shape is formed smoothly without any sudden change. The inner surface of the member 3 is more difficult to visually recognize.

  In the light emitting device 1 of the present embodiment, when a voltage is applied to the LED 21 through the wiring 5, the LED 21 emits light inside the light guide 22. The light emitted from the LED 21 is reflected and refracted on the surface of the light guide 22 and then radiated from the light guide 22 into the shade member 3. Of the light emitted from the light guide 22, the light incident on the surface of the shade member 3 is radiated to the outside of the light emitting device 1 through the transparent shade member 3. Since the light radiated to the outside of the light emitting device 1 through the shade member 3 is regularly reflected and refracted on the surface of the light guide 22, the light guide 22 itself faces the viewer who sees from the outside. Gives a beautiful impression of light emission.

  Of the light radiated from the light guide 22, part of the light incident on the upper surface of the blocking member 4 is reflected by the upper surface of the blocking member 4 and passes through the transparent shade member 3 to the outside of the light emitting device 1. Radiated. Thereby, a viewer who visually recognizes from the outside can recognize the image of the light projected on the upper surface of the closing member 4 through the shade member 3. Moreover, since the closing member 4 has translucency, a viewer who visually recognizes from the outside can recognize the image of light projected on the closing member 4 from the lower surface side of the closing member 4.

FIG. 4 is a bottom view of the light emitting device in a state where the light emitting unit emits light.
FIG. 4 shows an example of an image of light visually recognized from the lower surface side of the closing member 4 when the light emitting unit 2 emits light. The light image varies depending on the cut shape of the surface of the light guide 22, the refractive index of the light guide 22, the refractive index of the gas filled in the shade member 3, the refractive index of the closing member 4, and the like. . As shown in FIG. 4, the image projected on the blocking member 4 is a regular geometric image reflected and refracted on the surface of the light guide 22, so that a beautiful impression can be given to the viewer. .

  Moreover, according to the light-emitting device 1 of this embodiment, since the spacer 7 is transparent, the viewer can be given an impression that the light guide 22 is floating inside the shade member 3. Here, since the spacer 7 is formed in a polygonal cylindrical shape, it is difficult for a viewer to visually recognize the LED positioned inside the spacer 7 through the spacer 7.

  Further, according to the light emitting device 1 of the present embodiment, since the light emitting unit 2 is provided detachably with respect to the wiring 5, by replacing the light emitting unit 2 with a different shape, material, etc. of the light guide 22 The image of the light projected on the closing member 4 can be changed, and the color, intensity, etc. of the light projected on the closing member 4 can be changed by replacing the light emitting unit 2 with a different emission color, emission intensity, etc. It can be changed and is very convenient for practical use.

  Further, according to the light emitting device 1 of the present embodiment, since the closing member 4 is provided detachably with respect to the shade member 3, the light emitting unit 2 can be easily assembled and replaced, The inside of the shade member 3 and the light emitting part 2 can be easily and easily cleaned, and the maintainability is good.

  In the above-described embodiment, the shade member 3 is shown to be transparent throughout. However, as shown in FIG. 5, for example, a light shielding region 134 may be provided in a partial region of the shade member 3. The light shielding region 134 of the light emitting device 101 shown in FIG. 5 is provided, for example, by applying paint, applying metal plating, or roughening the surface of at least one of the inner surface and the outer surface of the shade member 3. it can.

  Moreover, in the said embodiment, although the cap member 3 formed in bowl shape was shown, the shape of the cap member 3 is not limited to this. The cap member extends from one end to the other end in a predetermined direction, has an opening at the other end, and has an outer surface and an inner surface that are curved so that the thickness increases from one end to the other end in the predetermined direction. If it is, the shape is arbitrary.

  Moreover, in the said embodiment, although the obstruction | occlusion member 4 showed what has white and translucency, even if the obstruction | occlusion member 4 exhibits translucency other than white, it is the same as that of the said embodiment The effect of this can be obtained. Further, the closing member 4 may be transparent, or the closing member 4 may not be provided.

  In the above embodiment, the light guide 22 is a polyhedron. However, for example, as shown in FIG. 6, the light guide 222 of the light emitting unit 202 may be a sphere. Further, the shapes of the wiring 5, the guide member 6 and the spacer 7 are also arbitrary, and it is needless to say that specific detailed structures and the like can be appropriately changed.

It is an external appearance perspective view of the light source device which shows one Embodiment of this invention. It is a disassembled perspective view of a light source device. It is a longitudinal cross-sectional view of a light source device. It is a bottom view of the light-emitting device in the state in which the light-emitting part is emitting light. It is an external appearance perspective view of the light source device which shows a modification. It is an external appearance perspective view of the light source device which shows a modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Light-emitting device 2 Light-emitting part 3 Shade member 4 Closure member 5 Wiring 6 Guide member 7 Spacer 21 LED
DESCRIPTION OF SYMBOLS 22 Light guide 23 Receiving hole 24 Electrode lead 25 Resin sealing part 31 Opening part 32 Wiring hole 33 Engagement hole 41 Protrusion part 51 Connector 52 Covering material 61 Cylindrical part 62 Upper part 63 collar part 101 Light emitting device 103 Shade member 134 Light-shielding area 201 light emitting device 202 light emitting unit 222 light guide

Claims (8)

A light emitting unit;
Covers the light-emitting part, spreads from one end to the other end in a predetermined direction, has an opening at the other end, and forms an outer surface and an inner surface so that the thickness increases from one end to the other end in the predetermined direction And a transparent shade member.   The light emitting device according to claim 1, wherein the shade member is formed in a bowl shape.   The light emitting device according to claim 2, wherein the outer member and the inner surface of the shade member are formed in a parabolic section.   The light-emitting device according to claim 3, further comprising a translucent blocking member that blocks the other end of the shade member.   The light-emitting device according to claim 4, wherein the closing member is detachable from the cap member. The light emitting unit
A transparent light guide,
The light emitting device according to claim 5, further comprising: a light emitting element embedded in the light guide. A wiring for supplying power to the light emitting element;
The light emitting device according to claim 6, wherein the light emitting unit is detachable from the wiring.   The light-emitting device according to claim 7, wherein the light guide is a polyhedron.

Images