JP2010282871A - Led lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an LED lighting system using an LED light source in which inconvenience of illumination due to directivity of the LED light source is eliminated. <P>SOLUTION: The LED lighting system 1 has LED light sources 7 arranged in a case 2 of which the base end 3 side is narrowed and the top end 5 side is expanded, and is provided with one or a plurality of reflectors 9 of umbrella shape of which inside a substrate 8 mounting the LED light source 7 is installed. The plurality of reflectors 9 are arranged superimposed from the base end 3 side toward the top end 5 side of the case 2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an LED lighting device.

  Generally, LED light-emitting devices using LEDs (light-emitting diodes) are known as light-emitting devices for illumination of display panels such as liquid crystal panels (for example, Patent Documents 1 to 4 below). 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 using the LED light emitting device that emits white light as a general illumination device has been advanced.
For example, a so-called incandescent bulb type housing, that is, an LED lighting device in which an LED light source is disposed in a housing in which a proximal end side is narrowed and a distal end portion is expanded, or an LED lighting device in which an LED light source is disposed in a tube It has been known.

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

However, since the LED light source has strong directivity, it has a disadvantage in how it shines. That is, the incandescent bulb type LED lighting device has a disadvantage that light is emitted only to the tip portion side and does not spread laterally.
In addition, the tube-type LED lighting device is not suitable as a lighting device because the light becomes dots or lines and does not spread in the entire circumferential direction.

  This invention is made | formed in view of such a situation, The objective is to provide the LED lighting apparatus with which the inconvenience of the lighting method resulting from the directivity of a LED light source was eliminated.

In order to achieve the above object, the present invention provides the following means.
(1) An LED illumination device in which an LED light source is arranged in a housing in which a proximal end side is narrowed and a distal end side is expanded, and one umbrella-like reflector having a substrate on which an LED light source is mounted is provided inside. Or the LED illuminating device provided with two or more, The said several reflector is arrange | positioned overlapping from the base end part side of the said housing | casing toward the front end part side.
(2) The shape of the umbrella of the reflector is formed so that the narrowing angle gradually decreases from the base end side to the tip end side of the casing (1). LED lighting device.
(3) The projected area of the reflector as viewed from the base end side of the casing is gradually decreased from the base end side of the casing toward the tip end side. The LED lighting device according to (1) or (2).
(4) An LED illumination device in which an LED light source is disposed in a tube, and includes a plurality of umbrella-like reflectors on the inside of which a substrate on which the LED light source is mounted, and the plurality of reflectors are formed of the tube. An LED lighting device, wherein the LED lighting device is arranged so as to overlap in an axial direction.

  The LED lighting device of the present invention is provided with a plurality of reflectors. Thereby, the light emitted from the LED light source is diffused by being reflected by the reflector, and the inconvenience due to the directivity of the LED light source can be solved.

  That is, in an LED lighting device using a so-called incandescent bulb type housing in which the proximal end side is narrowed and the distal end side is expanded, the light emitted from the LED light source is reflected by other reflectors and is laterally Light will come out and the horizontal direction can be brightened.

  Further, in the present invention, in an LED lighting device using a so-called incandescent bulb-shaped housing, the reflector has an umbrella-like shape with a gradually narrowing angle that decreases gradually from the base end side to the tip end side. It is formed to become. Thereby, since the light inject | emitted from the LED light source arrange | positioned at the front-end | tip part side of a housing | casing becomes difficult to reflect, the front-end | tip direction of a housing | casing can be made bright.

  Further, in the present invention, in the LED lighting device using a so-called incandescent bulb type housing, each projection of the reflector as seen from the base end portion of the housing as it goes from the base end portion side to the front end portion side of the housing. The area is formed so as to gradually become smaller. Thereby, since the light inject | emitted from the LED light source arrange | positioned at the front-end | tip part side of a housing | casing becomes difficult to reflect, the front-end | tip direction of a housing | casing can be made bright.

  Moreover, in the LED illumination device using the tube, the light emitted from the LED light source is reflected by another reflector, and the light is emitted in the entire circumferential direction, so that the entire circumferential direction can be brightened. .

FIG. 1 is a cross-sectional view of an example of an LED lighting device according to the first embodiment of the present invention. FIG. 2 is a cross-sectional view of an example of an LED lighting device that is a modification of the first embodiment of the present invention. FIG. 3 is a cross-sectional view of an example of an LED lighting device according to the second embodiment of the present invention. FIG. 4 is an enlarged cross-sectional view of a part of FIG. FIG. 5 is a cross-sectional view of an example of an LED illumination device that is a modification of the second embodiment of the present invention.

Hereinafter, an LED lighting apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings.
[First Embodiment]
As shown in FIG. 1, the LED lighting device 1 according to the first embodiment includes a housing 2, a circuit board 4 disposed on the base end 3 side of the housing 2, and a tip 5 side of the housing 2. And the lighting unit 6 arranged in the above.

The housing 2 has a so-called incandescent bulb shape in which the proximal end 3 side is narrowed and the distal end 5 side is expanded.
The base end 2 side may be a portion corresponding to a base of an incandescent bulb, and is configured to be electrically connected by contacting an external device. The tip 5 side has a spherical shape, and is formed to be transparent or translucent because it is necessary to transmit light.

  A circuit board 4 is disposed on the base end 3 side. The circuit board 4 is provided for electrical connection between the illumination unit 6 disposed on the front end 5 side of the housing 2 and an external device, and can emit light from the LED light source 7 in the illumination unit 6. Any device can be used as long as it can be used.

  The illumination unit 6 includes a plurality of umbrella-like reflectors 9 on the inside of which a substrate 8 on which an LED light source 7 is mounted is provided. The reflectors 9 are arranged so as to overlap from the base end 3 side of the housing 2 toward the tip end 5 side. In the present embodiment, since the illumination unit 6 is lightweight, the circuit board 4, the illumination unit 6, and the reflectors 9 are simply supported by the wires 10.

Each reflector 9 is formed in an umbrella shape, but the specific shape may be a cone shape, a pyramid shape, or an elliptical cone shape. Furthermore, it may be a shape having a curved surface such as a convex surface or a concave surface. The shape and size may be changed for each reflector 9, but in the present embodiment, those having the same shape and size are used.
Further, since the outer surface 9a of the reflector 9 is a reflective surface, it is preferably configured to easily reflect light, and is preferably a white diffusive surface. Any known reflective material in the field of illumination is used.

  The arrangement positions of the reflectors 9 are arranged such that the peripheral edge 11 of the reflector overlaps the top portion 12 of the other reflector 9 when viewed from the side of the housing 2.

Inside the reflector 9, a substrate 8 is attached in the vicinity of the top portion 12, and a plurality of LED light sources 7 are arranged on the substrate 8. Even if the LED light source 7 has a light emitting element (known three-color RGB light emitting element) directly mounted on the substrate 8, the light emitting element is sealed with a resin containing phosphor or a resin not containing phosphor. It may be packaged. As the packaged LED light source sealed with the sealing resin containing the phosphor, for example, two or more kinds of phosphors that absorb light emitted from the light emitting element and emit light having a longer wavelength are more uniformly dispersed. Made of transparent resin. Further, an illumination light source capable of emitting white light by a packaged LED light source in which a blue light emitting element is embedded in a transparent resin containing a yellow phosphor can be employed (for example, Japanese Patent Application Laid-Open No. 2008-282920). reference).
In the case of using a package-like one, the light emission direction may be the front end direction (downward direction in FIG. 1) of the housing 2 or the lateral direction (lateral direction in FIG. 1). When emitting to the side, it is preferable that the inner surface 9b of the reflector 9 is also a diffusive surface.

  Note that the number of LED light sources 7 mounted on the substrate 8 is set as appropriate according to the desired light intensity. In addition, when three types of LED light sources 7 that emit red, green, and blue monochromatic light are used, the number of the respective colors to be mounted is appropriately determined according to the desired light shade of the LED lighting 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 7. FIG.

  As described above, the LED lighting device 1 of the present embodiment has a configuration in which a plurality of reflectors 9 are provided. Thereby, the light emitted from the LED light source 7 is diffused by being reflected by the reflector 9, and the inconvenience due to the directivity of the LED light source 7 can be solved.

  That is, the light emitted from the LED light source 7 is reflected by another reflector 9 as indicated by an arrow A in FIG. 1, and the light is emitted in the lateral direction, so that the lateral direction can be brightened.

In the present embodiment, all the umbrella-like shapes of the reflectors 9 have the same shape, but as shown in FIG. 2A, the base 2 is directed from the base end 3 side toward the front end 5 side. Accordingly, the umbrella shape may be formed so that the gradually narrowing angle α becomes smaller. The narrowing angle α is an angle indicating the degree of opening of the umbrella inside the italic body 9.
Thereby, since the light inject | emitted from the LED light source 7 arrange | positioned at the front-end | tip part 5 side of the housing | casing 2 becomes difficult to reflect, the front-end | tip direction of the housing | casing 2 can be made bright.

  In the present embodiment, the sizes of the reflectors 9 are all the same. However, as shown in FIG. 2B, the housing 9 moves from the base end 3 side to the tip 5 side as shown in FIG. Each of the projected areas of the reflector as viewed from the base end portion 3 of 2 may be formed so as to gradually become smaller. Thereby, since the light inject | emitted from the LED light source 7 arrange | positioned at the front-end | tip part 5 side of the housing | casing 2 becomes difficult to reflect, the front-end | tip direction of the housing | casing 2 can be made bright.

Moreover, the support method of each reflector 9 is not limited. For example, an acrylic rod is arranged from the base end 3 side to the tip end 5 side of the housing 2, a hole is formed in the center of each reflector 9, and the acrylic rod is passed through the hole. May be. In this case, since the illumination unit 6 may be heavy, a larger number of reflectors 9 can be provided. The acrylic bar may be a bar made of a material other than acrylic such as a metal bar.
As described above, the first embodiment of the present invention is an LED illumination device in which an LED light source is arranged in a casing in which the proximal end side is narrowed and the distal end side is expanded, and the substrate on which the LED light source is mounted is on the inner side. An LED lighting device including one or more umbrella-shaped reflectors provided on the housing, wherein the plurality of reflectors are arranged to overlap from the base end side to the tip end side of the housing. Can do.
Here, the LED illumination device provided with one umbrella-like reflector provided with the substrate on which the LED light source is mounted may further include a reflector that separately reflects light from the LED light source. . In this case, the reflector installed separately may have a shape and size different from the umbrella-shaped reflector.

[Second Embodiment]
FIG. 3 is an example of a sectional view showing an LED lighting device 21 according to the second embodiment of the present invention, and FIG. 4 is a sectional view enlarging a part of FIG.
As shown in FIGS. 3 and 4, the LED illumination device 21 of the present embodiment includes a tube body 22, a circuit board 23 disposed at one end 22 a of the tube body 22, and an illumination unit disposed within the tube body 22. 24.

As shown in FIG. 4, the tubular body 22 has a shape extending in one direction with the same diameter, and a circuit board 23 is disposed at one end 22a. The one end 22a portion on which the circuit board 23 is disposed is a portion corresponding to a base of a fluorescent lamp, and is configured to be electrically connected by contacting an external device.
Further, the tube body 22 is formed to be transparent or translucent because it is necessary to transmit light.

  The circuit board 23 disposed on the one end 22a side of the tube body 22 is provided for electrical connection between the illumination unit 24 disposed in the tube body 22 and an external device. Any light source can be used as long as it enables the light source 25 to emit light.

  The illumination unit 24 includes a plurality of umbrella-like reflectors 27 each provided with a substrate 26 on which an LED light source 25 is mounted. Each reflector 27 is disposed so as to overlap in the axial direction of the tube body 22. Each reflector 27 is supported by placing an acrylic rod 28 in the tube body 22 from one end 22 a toward the other end 22 b, providing holes 27 a and 26 a in the center of each reflector 27 and substrate 26, and the acrylic rod 28. Is passed through the holes 27a and 26a by a skewering method.

Each reflector 27 is formed in an umbrella shape. However, as in the first embodiment, the specific shape may be a conical shape, a pyramid shape, or an elliptical cone shape. It doesn't matter. Further, the shape and size may be changed for each reflector 27, but in the present embodiment, the reflectors 27 having the same size and shape are used.
Further, since the outer surface 27b of each reflector 27 is a reflecting surface, it is preferably configured to easily reflect light, and is preferably a white diffusing surface.

  The arrangement positions of the reflectors 27 are arranged so that the peripheral edge 29 of the reflector 27 overlaps the top 30 of the other reflector 27 when viewed from the side of the tube body 22.

Inside the reflector 27, a substrate 26 is attached near the top 30, and a plurality of LED light sources 25 are arranged on the substrate 26. The LED light source 25 may be one in which a light emitting element is directly mounted on the substrate 26 or a package in which the light emitting element is sealed with resin or the like.
When a package-shaped one is used, the light emission direction may be the axial direction or the radial direction of the tube body 22. When emitting in the radial direction, the inner surface 27c of the reflector 27 is also preferably a diffusive surface.

  Note that the number of the LED light sources 25 mounted on the substrate 26 is arbitrarily set according to the desired light intensity. In addition, when three types of LED light sources 25 that emit red, green, and blue monochromatic light are used, the number of the respective colors to be mounted is appropriately determined according to the desired light shade of the LED lighting device 21. 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 25. FIG.

  As described above, the LED illumination device 21 of the present embodiment has a configuration in which a plurality of reflectors 27 are provided. Thereby, the light emitted from the LED light source 25 is diffused by being reflected by the reflector 27, and the inconvenience due to the directivity of the LED light source 25 can be solved.

  That is, the light emitted from the LED light source 25 is reflected by another reflector 27 as shown by an arrow B in FIG. 4, and the light is emitted in the entire circumferential direction, so that the entire circumferential direction can be brightened. it can.

  In the present embodiment, each reflector 27 is configured to face the same direction. However, as shown in FIGS. 5A and 5B, the direction is reversed with the vicinity of the center of the tube body 22 as a boundary. May be provided. Moreover, although the structure which provided the circuit board 23 in the one end 22a of the tubular body 22 was employ | adopted, you may provide in both ends. Moreover, you may form the shape of a tubular body as a ring shape.

  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.

Further, the present invention is not limited to the following examples.
[Example 1] Manufacture and evaluation of an incandescent bulb type illumination device A packaged LED light source was prepared according to Japanese Patent Application Laid-Open No. 2008-282920. Specifically, a 3-in-1 package (hereinafter referred to as a packaged LED light source) in which three known gallium nitride semiconductor light-emitting elements (element size: 350 μm square chip) emitting blue light are mounted in a recess case resin. 12 were prepared. Here, the packaged LED light source has a concave portion filled with a transparent resin containing a yellow phosphor, and when the blue light emitting diode (blue LED light source) is turned on by the transparent resin containing the yellow phosphor. The light is emitted as white light from the packaged LED light source.

First, four packaged LED light sources are mounted on a round substrate of a predetermined size, and this is confined to an umbrella-like reflector (a phosphor bronze plate having a thickness of 0.3 mm on the surface) with an angle α of approximately 90 degrees. This lighting unit was fixed inside the case with an acrylic stick. The casing used here was narrowed on the base end side and expanded on the tip end side, and a circuit board was mounted on the base end side. In addition, the outer peripheral size of the three-unit umbrella-like reflector was set to about 20 mmφ, and the same for all three units.
Further, the casing has a spherical electric lamp type structure of about 50 mmφ, and a polyethylene resin is molded and used.
When the lighting device manufactured in Example 1 was energized and a lighting test was performed, the room was brightly lit as a lighting device, and an illuminance of 100 lux was shown at 3 m directly below the light source.

[Example 2] Manufacture and Evaluation of Fluorescent Lamp Type Lighting Device Using 80 packaged LED light sources described in Example 1, the LED lighting device shown in Fig. 3 was manufactured. Four packaged LED light sources are mounted on a round substrate of a predetermined size, and this is confined to an umbrella-like reflector (a phosphor bronze plate with a plate thickness of 0.3 mm and white acrylic on the surface). The lighting unit was fixed to the inside of the tube with an acrylic stick. The tubular casing used here adopts a fluorescent lamp type structure having the same diameter and extending in one direction. Here, the outer diameter of the tube was about 30 mmφ, and the lighting unit for 20 units was mounted in the tube, and a circuit board was mounted on one end of the tube so that the lighting device could be energized. In addition, the polyethylene resin was shape | molded and used as a tubular body.
When the lighting device manufactured in Example 2 was energized and a lighting test was performed, the room was brightly lit as a lighting device, and an illuminance of 100 lux was shown at 5 m directly below the light source.

  The present invention can be widely used in the manufacturing industry for manufacturing LED lighting devices.

  DESCRIPTION OF SYMBOLS 1,21 ... LED lighting device, 2 ... Housing, 3 ... Base end of housing, 4, 23 ... Circuit board, 5 ... Front end of housing, 6, 24 ... Lighting unit, 7,25 ... LED light source, 8,26 ... Substrate, 9,27 ... Reflector, 10 ... Wire, 11,29 ... Rim of reflector, 12 , 30 ... top of reflector

Claims (4)

An LED illumination device in which an LED light source is arranged in a housing in which a proximal end side is narrowed and a distal end side is expanded,
One or a plurality of umbrella-like reflectors provided with an LED light source substrate provided inside,
The LED lighting device, wherein the plurality of reflectors are arranged so as to overlap from a base end side to a tip end side of the casing.   2. The umbrella-like shape of the reflector is formed so that a narrowing angle gradually becomes smaller from the base end side to the tip end side of the casing. LED lighting device.   The projected area of the reflector as viewed from the base end side of the casing is gradually decreased from the base end side of the casing toward the tip end side. The LED lighting device according to claim 1 or 2. An LED lighting device in which an LED light source is arranged in a tube,
A plurality of umbrella-shaped reflectors provided with an LED light source on the inside are provided,
The LED lighting device, wherein the plurality of reflectors are arranged so as to overlap in an axial direction of the tube body.

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