JP2010277826A - Led lighting device, and lighting fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an LED lighting device capable of suppressing costs of materials at low range, having high freedom of design, and also capable of being made thin. <P>SOLUTION: The LED lighting device 1 is provided with a base body 3, a plurality of LED light sources 2a, 2b mounted on the base body 3, and a plurality of circular, elliptical or polygonal ringed reflective thin bands 4 of different sizes arranged slantwise from the base body 3. The plurality of reflective thin bands 4 are coaxially arranged on the base body 3, and each of the reflective thin bands 4, when viewed from a countering side of the base body 3, are formed as a circular, elliptical or polygonal rings with a predetermined width between a peripheral edge of a starting point where the reflecting thin bands 4 and the base body 3 are in contact with each other, and a peripheral edge at an end of the reflecting thin bands 4. The LED light sources 2a, 2b are each arranged outside of the peripheral edge of the starting point of each reflective thin band 4. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an LED light-emitting device and a lighting fixture.

In general, an LED light emitting device using an LED (light emitting diode) is known as a light emitting device for illumination of a display panel such as a liquid crystal panel. Such an LED light emitting device includes three types of LED light sources that emit red, green, and blue monochromatic light, and mixes the monochromatic light emitted from each LED light source or provides a phosphor on the surface of the LED light source. Some of them emit white light.
In recent years, research and development for expanding the use of LED light emitting devices that emit white light, such as lighting fixtures, have been advanced.

  As such an LED light emitting device, from the background of research and development for a display panel, an edge light system in which light from an LED is incident on an end surface of a light guide plate, or an LED is disposed directly below a diffusion plate, For example, a direct method for diffusing light from the LED is known.

JP 2006-269365 A JP 2006-221922 A JP 2006-221923 A JP 2006-286539 A

  However, in the edge light system, in addition to the LED light source, a bar light guide provided with an LED light source at one end, and light emitted from the side end surface of the bar light guide are introduced into the interior, and are substantially rectangular in plan view. Since a light guide plate having a substantially rectangular shape in plan view that is emitted from the entire emission surface is used, there is a problem that material costs increase. There is also a problem that it is difficult to dissipate heat generated by the LED light source. Furthermore, since the light guide plate is formed in a rectangular shape when viewed in plan, there is a problem that the shape of the entire apparatus is limited to a rectangular shape, the degree of freedom in design is low, and it is not suitable for illumination.

  Further, the direct method has a problem in that the thickness cannot be reduced because the diffusion plate has to be arranged at a certain distance from the LED light source.

  The present invention has been made in view of such circumstances, and its purpose is to reduce the material cost at a low cost, to provide excellent heat dissipation, to provide a high degree of design freedom, and to reduce the thickness. It is providing the LED light-emitting device which can be manufactured.

In order to achieve the above object, the present invention provides the following means.
(1) A base, a plurality of reflective ribbons arranged concentrically on one surface of the base and formed in an annular shape or a non-annular shape, and an outer periphery of the reflective ribbon on one surface of the base A plurality of LED light sources arranged on the side, both the inner peripheral surface and the outer peripheral surface of the reflective ribbon are reflective surfaces, and each reflective surface of the reflective ribbon is one surface of the substrate The LED light emitting device, wherein the reflective ribbon is erected on the base so as to be inclined.
(2) The LED light-emitting device according to (1), wherein the LED light source is disposed between the reflective ribbon on the inner peripheral side and the reflective ribbon on the outer peripheral side.
(3) The LED light-emitting device according to (1) or (2), wherein an LED light source is disposed on the outer peripheral side of the outermost reflective ribbon.
(4) The LED according to any one of (1) to (3), wherein the angle of inclination of the reflective ribbon with respect to one surface of the base is uniform over the entire circumference of the reflective ribbon. Light emitting device.
(5) The LED light-emitting device according to any one of (1) to (4), wherein an inclination angle of the reflective ribbon with respect to one surface of the substrate is in a range of 20 ° to 70 °. .
(6) The LED light emitting device according to any one of (1) to (5), wherein an inclination angle of each of the reflective ribbons with respect to one surface of the substrate is the same.
(7) The LED light-emitting device according to any one of (1) to (5), wherein an inclination angle of each of the reflective ribbons with respect to one surface of the substrate is smaller toward an outer peripheral side.
(8) The LED light emitting device according to any one of (1) to (7), wherein the reflective ribbon is a quadrangular annular shape.
(9) The LED light-emitting device according to any one of (1) to (8), wherein the reflective surface of the reflective ribbon is a total reflection surface or a diffuse reflection surface.
(10) A lighting fixture characterized by using the LED light-emitting device according to any one of (1) to (9).

  Since the LED light-emitting device of the present invention does not use a light guide plate, the material cost can be kept low. In addition, there is nothing that hinders heat dissipation caused by the LED light source, and heat dissipation is easy. Moreover, since the light from the LED light source is diffused by being reflected on the reflection surface of the reflective ribbon, it is not necessary to dispose a diffusion plate, and the entire device can be made thinner and lighter.

  In the present invention, one or more reflective ribbons are concentrically arranged, and the LED light source is disposed between the reflective ribbon on the inner peripheral side and the reflective ribbon on the outer peripheral side. Thereby, the light emitted from the LED light source is reflected by both the inner reflection ribbon and the outer reflection ribbon, and can be further diffused.

  Moreover, in this invention, it becomes possible to irradiate the direction parallel to a base | substrate by providing an LED light source in the outer peripheral side of the reflective ribbon arrange | positioned in the outermost periphery, and can obtain a wide irradiation angle.

FIG. 1 is a plan view showing an example of an LED light-emitting device according to the first embodiment of the present invention. 2 is a cross-sectional view taken along the line A-A ′ in FIG. 1. FIG. 3 is a plan view showing an example of the LED light-emitting device according to the first embodiment of the present invention. FIG. 4 is a cross-sectional view showing an example of the LED light-emitting device according to the first embodiment of the present invention. FIG. 5 is a cross-sectional view showing an example of an LED light-emitting device according to the second embodiment of the present invention. FIG. 6 is an exemplary cross-sectional view of an LED light source used in the present invention.

Hereinafter, an LED light emitting device according to an embodiment of the present invention will be described in detail with reference to exemplary drawings.
[First Embodiment]
As shown in FIGS. 1 and 2, the LED light-emitting device 1 of the present embodiment is vertically installed with a base 3 on which a plurality of LED light sources 2 are mounted on one surface 3 a and an inclined surface 3 a of the base 3. The reflective thin ribbon 4 is generally configured.

The substrate 3 may be of any material and structure as long as the LED light source 2 can be mounted so as to emit light. For example, a flexible substrate can be used.
The substrate 3 may have any shape and size, but in the present embodiment, a substrate having a substantially disk shape in a plan view and a diameter of about 30 to 40 cm is used.

The reflective ribbon 4 may be a light-shielding type or may partially transmit light. In this embodiment, both the inner peripheral surface (concave surface 13) and the outer peripheral surface (convex surface 12) are total reflection surfaces. Use something. However, the inner peripheral surface refers to a surface that reflects light from the light source 2 toward the inside of the LED light-emitting device 1, and the outer peripheral surface refers to a surface that reflects light from the light source 2 toward the outside of the LED light-emitting device 1. Point to. The concave surface 13 refers to the surface of the reflective ribbon 4 that indicates the concave surface in the LED light emitting device 1, and the convex surface 12 refers to the surface of the reflective ribbon 4 that indicates the convex surface.
Moreover, the reflective thin ribbon 4 is provided so that two things with different magnitude | sizes may be arrange | positioned concentrically. Specifically, the reflective ribbon 4a having a small diameter is disposed inside the reflective ribbon 4b having a large diameter.
Moreover, the height t of the reflective ribbon 4 is formed to be about 10 mm.

The reflective ribbon 4 is disposed to be inclined with respect to the base 3. Specifically, the inner reflective ribbon 4a and the outer reflective ribbon 4b are both configured in an annular shape. The peripheral edges of the tips 6a and 6b are configured to increase in diameter as they rise from the starting points 5a and 5b in contact with the base 3. That is, when viewed from the side facing the base 3, the range surrounded by the peripheral edge of the starting point 5 a in contact with the base 3 of the reflective ribbon 4 a and the peripheral edge of the tip 6 a of the reflective ribbon 4 a has a predetermined thickness l. And is formed in a ring shape (annular shape). Similarly, the reflective ribbon 4b is formed in a ring shape having a predetermined thickness m in a range surrounded by the periphery of the starting point 5b and the periphery of the tip 6b.
In addition, the inclination angle α of the reflective ribbons 4a and 4b with respect to the one surface 3a of the base 3 is configured to be equal within a range of more than 0 ° and less than 90 °. Furthermore, the inclination angle α is more preferably in the range of 20 ° to 70 °. In addition, the reflective ribbons 4a and 4b have a uniform inclination angle α with respect to the one surface 3a of the substrate 3 over the entire circumference.

  The LED light source 2 need only be mounted on the substrate 3 and can emit light, and any conventionally known LED light source 2 can be used. Further, it may be one that emits light in a direction that is mainly perpendicular to the substrate 3 or one that emits light in a direction that is mainly parallel to the substrate 3.

Specifically, as shown in FIGS. 6A to 6D, a light-emitting element 7 sealed with a transparent resin 8 can be used.
The LED light source 2a shown in FIG. 6A is configured by mounting a light emitting element 7 directly on a base 3 and further forming a sealing resin 8 covering the light emitting element 7 on the base 3. The light emitting element 7 is connected to a wiring (not shown) on the base 3 by a wire 7a.
The LED light source 2b shown in FIG. 6B includes a package molded body 19 installed on the base 3, a light emitting element 7 disposed in the recess of the package molded body 19, and a light emitting element 7 filled in the recess to cover the light emitting element 7. And a sealing resin 8. A known phosphor may be mixed in the sealing resin 8. The light emitting element 7 is connected to a wiring (not shown) of the package molded body 19 by a wire 7a.

In the case where light is emitted mainly in a direction perpendicular to the base 3, the LED light source 2 shown in FIG. 6 (a) or 6 (b) may be directly mounted on the base 3.
When light is emitted mainly in a direction parallel to the base 3, an appropriate substrate 9 such as a glass epoxy substrate is placed vertically on the base 3 as shown in FIG. 6 (c) or 6 (d). It arrange | positions and mounts said LED light source 2a or 2b on one surface 9a of the glass epoxy board | substrate 9. FIG. In this case, the other surface 9 b of the glass epoxy substrate 9 and the base 3 are electrically connected by solder 10 or the like, and electrical connection between the base 3 and the LED light source 2 is achieved through the through hole 11 of the glass epoxy substrate 9. .

  Further, as shown in FIG. 2, about 50 LED light sources 2 are mounted between the inner reflection ribbon 4a and the outer reflection ribbon 4b, and about 100 outside the outer reflection ribbon 4b. It is installed. In this way, the LED light source 2 is disposed outside the peripheral edges 5a and 5b of the starting points of the reflective ribbons 4a and 4b, respectively.

The LED light source 2a disposed on the inner peripheral side of the reflective ribbon 4b (between the inner peripheral reflective ribbon 4a and the outer reflective ribbon 4b) on the outer peripheral side of the reflective ribbon 4a A light emitting device that emits light in a direction perpendicular to the light source or a light emitting device that emits light in a parallel direction may be used. However, when light is emitted in a parallel direction, light is emitted toward the reflective ribbon 4b. This is because when the light is emitted toward the reflective ribbon 4a, the reflected light travels toward the base 3 and therefore no light is emitted outside the base 3.
When the light is emitted in the vertical direction, as indicated by an arrow B in FIG. 2, the light is reflected by the convex surface 12 of the reflective ribbon 4a and then reflected by the concave surface 13 of the reflective ribbon 4b to be emitted.
When the light is emitted in a parallel direction, as indicated by an arrow C, the light is reflected by the concave surface 13 of the reflective ribbon 4b and then reflected by the convex surface 12 of the reflective ribbon 4a to be emitted.

The LED light source 2b disposed on the outer peripheral side of the reflective ribbon 4b on the outer peripheral side may be one that emits light in a direction perpendicular to the base 3 or one that emits light in a parallel direction. From the viewpoint of diffusing light, it is preferable to use one that emits light in a vertical direction. When light is emitted in a parallel direction, light is emitted toward the opposite side of the reflective ribbon 4b. This is because when the light is emitted toward the reflective ribbon 4b, the reflected light travels toward the base 3 side, so that the light is not emitted outward from the base 3.
When light is emitted mainly in the vertical direction, as indicated by an arrow D, the light is reflected by the convex surface 14 of the reflective ribbon 4b and emitted to the outside of the substrate 3. When light is emitted mainly in a parallel direction, light is emitted directly to the outside of the substrate 3 as indicated by an arrow E.

  When three types of LED light sources 2 that emit monochromatic light of red, green, and blue are used, the number of each color to be mounted is appropriately determined according to the desired light shade of the LED light-emitting device 1. That's fine. Moreover, you may provide the fluorescent substance suitable for the hue of the desired light on the surface of the LED light source 2. FIG.

  Since the LED light-emitting device 1 of this embodiment does not use the light guide plate, the material cost can be reduced at a low cost. Moreover, there is nothing which prevents the heat radiation generated by the LED light source 2, and the heat radiation is easy. Moreover, since the light from the LED light source 2 is diffused by being reflected by the reflective ribbon 4, it is not necessary to dispose a diffusion plate, and the entire apparatus can be reduced in thickness and weight.

  Two reflective ribbons 4 are provided concentrically, and the reflective ribbon 4a having a small diameter is disposed inside the reflective ribbon 4b having a large diameter. As a result, the light from the LED light source 2a disposed between the reflective ribbons 4a and 4b is reflected by both the inner reflective ribbon 4a and the outer reflective ribbon 4b, and is further diffused. Become. That is, the light emitted from the LED light source 2a is diffused by being reflected on the convex surface 12 of the reflective ribbon 4a (or the concave surface 13 of the reflective ribbon 4b). Then, the diffused light is further reflected by the concave surface 13 of the reflective ribbon 4b (the convex surface 12 of the reflective ribbon 4a) and further diffused. Thus, since the light emitted from the LED light-emitting device 1 is diffused, it is suitable as illumination light that requires a wide irradiation angle.

Further, since the reflective ribbon is formed in an annular shape, the light emitted from the LED light emitting device 1 is emitted without any deviation, and is suitable as illumination light that requires a wide irradiation range.
That is, the light emitted from the LED light emitting device 1 is limited in the emission direction by the reflective ribbons 4a and 4b. If the reflective ribbon is not formed in an annular shape, the light emitted from the LED light emitting device 1 is viewed from the side facing the base 3. However, since the reflective ribbons 4a and 4b are formed in an annular shape, they can be emitted in the entire circumferential direction. .

  Further, by providing the LED light source 2b on the outer peripheral side of the outermost reflective ribbon 4b, it is possible to irradiate in a direction parallel to the base 3, and a wide irradiation angle can be obtained.

  In the present embodiment, the shape of the reflective ribbon 4 is an annular shape, but may be formed in a non-annular shape such as an elliptical shape or a polygonal shape. For example, as shown in FIG. Further, the reflective surface of the reflective ribbon 4 may be formed as a diffuse reflective surface.

In the present embodiment, the inclination angles α of the reflective ribbons 4a and 4b with respect to the base 3 are configured to be equal to each other. However, they may be of different sizes or may be formed smaller toward the outer peripheral side. For example, as shown in FIG. 4, the inclination angle β of the outer reflective ribbon 4b with respect to the one surface 3a of the base 3 can be made smaller than the inclination angle α of the inner reflective ribbon 4a. In this case, light emitted from the LED light source 2b is emitted in a direction parallel to the base 3, and when the LED light emitting device 1 is used as an illumination device that is grounded to the ceiling, the ceiling surface is illuminated more brightly. Can do.
In this way, an illumination device that irradiates a desired direction can be obtained by freely setting the inclination angles of the reflective ribbons 4a and 4b with respect to the base 3.

[Second Embodiment]
FIG. 5 is a cross-sectional view showing an example of the LED light-emitting device 21 according to the second embodiment of the present invention.
The LED light-emitting device 21 of this embodiment is a modification of the first embodiment in which the shape of the reflective ribbon is changed, and description of similar parts is omitted.

  As shown in FIG. 5, in the present embodiment, three reflective ribbons 22 having different sizes are arranged on the base 3. The reflective ribbons 22a, 22b, and 22c are arranged concentrically and have a relationship in which a reflective ribbon with a small diameter is disposed inside a reflective ribbon with a large diameter.

The reflective ribbon 22 is disposed so as to be inclined with respect to the one surface 3a of the base 3. Specifically, the reflective ribbon 22a is conical, and the reflective ribbons 22b and 22c are both annular. It is comprised so that the periphery of the front-end | tip 24a, 24b, 24c may reduce in diameter as it stands | starts up from the starting points 23a, 23b, 23c which contact | connect the base | substrate 3. FIG.
That is, when viewed from the side facing the base 3, the range surrounded by the peripheral edge of the starting point 23b of the reflective ribbon 22b contacting the base 3 and the peripheral edge of the tip 24b of the reflective ribbon 22b has a predetermined width. And it is formed in a ring shape. Similarly, in the reflective ribbon 22c, a range surrounded by the periphery of the starting point 23c and the periphery of the tip 24c is formed in a ring shape.
As a result of the diameter reduction of the smallest reflective ribbon 22a, the tip 24a portion forms a vertex, and the reflective ribbon 22a has a conical shape as a whole.

The LED light source 2 is disposed between the reflective ribbons on the one surface 3 a of the base 3. Specifically, there are about 50 LED light sources 2c between the reflective ribbon 22a having the smallest diameter and the reflective ribbon 22b just outside thereof, and the reflective ribbon 22c and the reflective ribbon 22c having the largest diameter. In between, about 100 LED light sources 2d are arranged.
In the present embodiment, the LED light source 2 is not disposed on the outer peripheral side of the reflective ribbon 22c having the largest diameter.

Each LED light source 2 may be either one that emits light in a direction perpendicular to the base 3 or one that emits light in a parallel direction. However, when light is emitted in a parallel direction, light is emitted toward the inner reflective ribbon. This is because when the light is emitted toward the outer reflective ribbon, the reflected light travels toward the base 3, so that no light is emitted outside the base 3.
When light is emitted in the vertical direction, as indicated by an arrow F in FIG. 5, the light is reflected by the concave surface 25 of the outer reflective ribbon and then reflected by the convex surface 26 of the inner reflective ribbon and exits outward.
When light is emitted in a parallel direction, as indicated by an arrow G, the light is reflected by the convex surface 26 of the inner reflective ribbon and then reflected by the concave surface 25 of the outer reflective ribbon and exits outward.

  Similarly to the first embodiment, the LED light-emitting device 21 of the present embodiment does not use a light guide plate, so that the material cost can be reduced. Moreover, since the light from the LED light source 2 is diffused by being reflected by the reflective ribbon 22, it is not necessary to dispose a diffusion plate, and the entire apparatus can be reduced in thickness and weight.

  Moreover, the three reflective ribbons 22 are provided concentrically, and the reflective ribbon with a small diameter is arrange | positioned inside the reflective ribbon with a large diameter. As a result, the light from the LED light source 2 disposed between the reflective ribbons 22a, 22b, and 22c is reflected by both the inner reflective ribbon and the outer reflective ribbon, and is further diffused. . That is, the light emitted from the LED light source 2 is diffused by being reflected on the concave surface 25 of the outer reflective ribbon (or the convex surface 26 of the inner reflective ribbon). Then, the diffused light is reflected by the convex surface 26 of the inner reflective ribbon (the concave surface 25 of the outer reflective ribbon) and further diffused. Thus, since the light emitted from the LED light emitting device 21 is diffused, it is suitable as illumination light that requires a wide irradiation angle.

  Further, since the reflective ribbon is formed in an annular shape, the light emitted from the LED light emitting device 1 is emitted without any deviation, and is suitable as illumination light that requires a wide irradiation range.

Also in this embodiment, the shape of the reflective ribbon 22 may be formed in a non-annular shape such as an oval or polygonal ring.
Further, in the present embodiment, the angle of inclination of the reflective ribbon 22 with respect to the one surface 3a of the base 3 is made equal, but it may be made different.

As mentioned above, although the invention made | formed by this inventor was demonstrated based on embodiment, it cannot be overemphasized that this invention can be variously changed in the range which is not limited to the said embodiment and does not deviate from the summary.
For example, in the above-described embodiment, the case where two or three reflective ribbons are used has been described. However, the number is not limited to these and may be one or four or more. Absent.

  Moreover, it is good also as an illuminating device using the LED light-emitting device of this invention. In that case, by installing the base on the wall surface, it can be effectively used as a thin lighting device.

  The present invention can be widely used in the manufacturing industry for manufacturing LED light-emitting devices.

  DESCRIPTION OF SYMBOLS 1,21 ... LED light-emitting device, 2, 2a, 2b, 2c, 2d ... LED light source, 3 ... Base | substrate, 3a ... One surface of a base | substrate, 4, 4a, 4b, 22, 22a, 22b , 22c ... reflective ribbon, 5a, 5b, 23a, 23b, 23c ... the origin of the reflective ribbon, 6a, 6b, 24a, 24b, 24c ... the tip of the reflective ribbon, 7 ... light emission Element: 7a: Wire, 8: Resin, 9: Glass epoxy substrate, 10: Solder, 11: Through-hole hole, 12, 26: Convex surface of reflective ribbon, 13, 25 ... Concave surface of reflective ribbon, 19 ... Package molded product

Claims (10)

A substrate;
A plurality of reflective ribbons arranged concentrically on one surface of the substrate and formed in an annular or non-annular shape;
A plurality of LED light sources arranged on the outer surface of the reflective ribbon on one surface of the base;
The reflective ribbon is erected on the substrate so that both the inner peripheral surface and the outer peripheral surface of the reflective ribbon are reflective surfaces, and each reflective surface of the reflective ribbon is inclined with respect to one surface of the substrate. LED light-emitting device characterized by being made.   The LED light-emitting device according to claim 1, wherein the LED light source is disposed between the reflective ribbon on the inner peripheral side and the reflective ribbon on the outer peripheral side.   The LED light-emitting device according to claim 1, wherein an LED light source is disposed on an outer peripheral side of the outermost reflective ribbon.   The LED light emitting device according to any one of claims 1 to 3, wherein an inclination angle of the reflective ribbon with respect to one surface of the base is uniform over the entire circumference of the reflective ribbon.   5. The LED light emitting device according to claim 1, wherein an inclination angle of the reflective ribbon with respect to the one surface of the base is in a range of 20 ° to 70 °.   The LED light emitting device according to any one of claims 1 to 5, wherein an inclination angle of each of the reflective ribbons with respect to one surface of the base is the same.   The LED light-emitting device according to any one of claims 1 to 5, wherein an inclination angle of each of the reflective ribbons with respect to one surface of the base is smaller toward an outer peripheral side.   The LED light-emitting device according to claim 1, wherein the reflective ribbon is a quadrangular annular shape.   The LED light-emitting device according to claim 1, wherein the reflective surface of the reflective ribbon is a total reflection surface or a diffuse reflection surface.   A lighting fixture comprising the LED light-emitting device according to any one of claims 1 to 9.

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