JP5416268B1 - High-reflection reflector light source - Google Patents

Abstract

A surface-emitting display device for an illumination type switch or amusement device that is less likely to cause luminance unevenness and chromaticity unevenness even when the distance between a light source and a light diffusion plate is narrowed to reduce the thickness of the device. Obtain a highly reflective reflector light source to be used.
A bottom surface on which a substrate 111 on which a point light source 112 made of LEDs is mounted is mounted, and a reflection surface 114 that is inclined at a predetermined angle from the bottom surface and irradiates light from the point light source on the top surface. In addition, a reflector 116 supported by a plurality of legs 117 and allowing light to pass between the legs 117 is disposed on the point light source on the bottom surface, and the reflector 116 transmits light from the point light source 112. A plurality of unit housings 102 are provided so that the reflected light is radiated to the outside of the reflecting plate 116 from between the plurality of leg portions 117, and the light diffusing plate is provided on each unit housing 102 at a predetermined interval. 118 was attached.
[Selection] Figure 4

Description

The present invention relates to a highly reflective reflector light source used in a direct type LED illumination device in which a light source is disposed directly under a light emitting surface of a surface emitting display device for an illumination type switch or an amusement device. More specifically, a point light source such as an LED (light emitting diode) that emits monochromatic light such as W (white), R (red), G (green), and B (blue), or a combination of a plurality of point light sources. The present invention relates to a highly reflective reflector light source used in a direct type LED illumination device in which a light source is disposed directly under a light emitting surface of a light emitting surface used for an illumination type switch or an amusement device.

As a conventional LED lighting device, a planar light source device disclosed in Japanese Patent Application Laid-Open No. 2004-313153 (see Patent Document 1) is arranged between a point light source (LED) and a light diffusion plate, 2. Description of the Related Art Among the second reflecting plates, one in which the area of the reflecting surface facing at least the first reflecting plate disposed on the bottom surface of the casing is smaller than the area of the bottom surface of the casing is known.
Japanese Patent Application Laid-Open No. 2004-6317 (see Patent Document 2) discloses a direct-type display device in which a translucent diffusion panel is disposed in front of a light source and the diffusion panel is surface-emitted with light from the light source. The light source includes an LED, a reflector that reflects the light of the LED, and a light control unit disposed between the LED and the diffusion panel. The light control unit reflects and transmits the light of the LED. And a reflection main part that is provided at a position corresponding to the central part of the LED to increase the reflection amount more than the light transmission amount, and that is provided around the reflection main part to increase the light transmission amount more than the reflection main part. A surface light-emitting device having a reflection / transmission unit is described.

Japanese Patent Laid-Open No. 2004-313153 JP 2004-6317 A

In a planar light source device in which a rod-like or plate-like second reflector is arranged on a plurality of point light sources (LEDs) disclosed in Japanese Patent Application Laid-Open No. 2004-313153 (see Patent Document 1), the light source and the second reflection are provided. There is also a problem that it is difficult to accurately maintain the distance from the plate, luminance unevenness occurs during use, and deformation of the point light source (LED) due to heat occurs.

Moreover, the light control means arrange | positioned between Unexamined-Japanese-Patent No. 2004-6317 (refer patent document 2) and the diffusion panel reflects and permeate | transmits the light of the said LED, and is in the center part of the said LED. A reflection main body provided at a corresponding position to increase the reflection amount than the light transmission amount, and a reflection transmission portion provided around the reflection main portion to increase the light transmission amount than the reflection main portion. However, since it is costly to use a special light control means and is attached to the light source part via the cylindrical holder part, deformation due to heat of the point light source (LED) occurs, There was a problem that the heat radiation of the point light source (LED) was insufficient.

In addition, when the reflection plate as described above is not used, the point light source is separated from the light emitting surface in order to obtain uniform illumination. Therefore, the illuminance is insufficient, and more light quantity or point light source is used to compensate for it. Necessary. For this reason, heat dissipation measures are also large-scale, which causes high costs.
Incidentally, FIG. 8 shows the light distribution intensity of a surface-emitting display device using a general LED that does not use a reflector as described above. As shown in FIG. 8, the light density at the center of the LED light source is extremely high, and uneven brightness tends to occur.

The present invention has been made in order to solve the above-described problems of the conventional example. The illumination is less likely to cause uneven brightness even when the distance between the light source and the light diffusion plate is narrowed to reduce the thickness of the device. To obtain a highly reflective reflector light source for use in a surface emitting display device for an electronic switch or amusement equipment, and to provide various surface emitting illuminations suitably by using this highly reflective reflector light source With the goal.

In order to eliminate the above-mentioned problems of the conventional example, the light reflection reflector light source of the present invention is a bottom surface on which a substrate on which a point light source consisting of LEDs is mounted is mounted, and a point light source inclined at a predetermined angle from the bottom surface. A circular reflector that is supported by a plurality of legs on the point light source on the bottom surface and allows light to pass between the legs. And a plurality of unit housings that reflect the light from the point light source so that the light is radiated from between the plurality of leg portions to the outside of the reflecting plate. A light diffusing panel is attached on the top at a predetermined interval.

In the highly reflective reflector light source of the present invention, the bottom surface on which the substrate on which the point light source composed of the LED is mounted is formed with an opening for mounting the substrate in advance, and a groove for guiding the wiring to the substrate Is also formed on the back surface.

In the highly reflective reflector light source of the present invention, each housing is characterized in that a partition wall is erected at each joint portion between the inclined surface and the inclined surface.

The light high reflection reflector light source according to the present invention is characterized in that the light high reflection reflector light source provided with a plurality of the unit housings is molded into a predetermined shape by a molding means including vacuum molding and injection molding. is there.

As described above, the present invention provides a plurality of legs between a point light source mounted on a substrate installed in an opening and a light emitting surface such as a light diffusing plate arranged at a predetermined interval. The reflector is arranged through the section, and the irradiation distance between the point light source and the light emitting surface can be greatly reduced.
In addition, since a circular reflector is interposed between the point light source and the light emitting surface, the light can be greatly dispersed by avoiding the concentration of light by the point light source (referring to FIG. 8). It is possible to switch to a wide area light source without reducing the light quantity of the light source. The distribution intensity of light at that time is shown in FIG.
Of course, a plurality of legs attached at positions surrounding the opening of the chassis are integrally formed with the chassis by molding means including vacuum molding and injection molding, or are formed separately from each other, and the post process. Thus, by integrating by means such as an adhesive or heat fusion, it is possible to achieve a good dimensional accuracy and a significant cost reduction.

Further, the present invention provides a unit housing comprising a bottom surface on which a substrate on which a point light source made of LEDs is mounted is mounted, and an inclined surface that is inclined at a predetermined angle from the bottom surface and irradiates light from the point light source on the upper surface. A plurality of light reflecting reflectors in which light distribution intensities in the state shown in FIG. 7 are dispersed in parallel to avoid the concentration of light by a point-like light source (focusing, see FIG. 8). A light source can be obtained.

1 shows one embodiment of a highly reflective reflector light source according to the present invention, in which (a) is a plan view of a state in which a predetermined number of unit housings are arranged side by side, (b) is a central cross-sectional view thereof, and (c) is that of FIG. It is a longitudinal cross-sectional view. FIG. 3 shows another embodiment of the light reflection reflector light source according to the present invention, in which (a) is a plan view of a state in which a predetermined number of unit housings are arranged side by side, (b) is a central cross-sectional view thereof, and (c) is FIG. It is the longitudinal cross-sectional view. It is a top view which shows the outline | summary of the light reflection simulation in the unit housing of the light highly reflective reflector light source of this invention. FIG. (A) is sectional drawing which shows the condition of the light reflection of the conventional direct light type LED panel, (b) is the LED panel using the reflecting plate of this invention, respectively. It is a top view which shows the condition of the light reflection of the LED panel using the reflecting plate of this invention. It is a top view which shows the condition of the light reflection in the unit housing of the highly reflective reflector light source of this invention. It is a top view which shows the distribution intensity | strength of the light of the surface emitting display apparatus using common LED which does not use a reflecting plate.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a highly reflective reflector light source used in an illuminated switch and a surface emitting display device for amusement equipment according to the present invention will be described in detail below with reference to the drawings.
1 (a) to 1 (c) showing a first embodiment of a light high reflection reflector light source used in the illumination type switch and the surface emitting display device for amusement equipment of the present invention, the light high reflection reflector light source 101 is shown in FIG. The unit housing 102 to be configured includes a bottom surface 113 for mounting a substrate on which a point light source made of LEDs is mounted, and a reflecting surface 114 that is inclined at a predetermined angle from the bottom surface 113 and irradiates light from the point light source on the top surface. It has.

Furthermore, as shown in FIGS. 3 and 4, the light highly reflective reflector light source 101 used in the surface-emitting display device for the illumination type switch and the amusement device includes an LED substrate 111 on which a point light source 112 made of LEDs is mounted. And a unit housing 102 provided with a reflecting surface 114 and provided with an opening 115 for the point light source on the bottom surface 113, and a plurality of legs 117 attached to a position surrounding the opening 115 of the unit housing 102. And a circular reflecting plate 116 held above the opening 115 of the unit housing 102.
The reflector 116 reflects the light from the point light source 112, and the light passes between the plurality of legs 117 attached to the position surrounding the opening 115 of the unit housing 102. To be emitted. If the number of the leg portions 117 is two or more, the number of leg portions 117 can be set to an appropriate number in consideration of strength and the like as long as the light diffusion is not hindered.

As the material of the unit housing 102 and the reflection plate 116, polypropylene and other various plastic materials are desirable, and a material such as plastic that is easy to reflect may be applied.

Light from the point light source 112 radiated to the outside of the reflection plate 116 from between the plurality of leg portions 117 is disposed at an appropriate position on the unit housing 102 of the lighting device at a predetermined interval from the point light source 112. The light diffusing plate 118 is irradiated outside the unit housing 102.
FIG. 5A and FIG. 5B show the result of comparing such light diffusion with the conventional direct light LED panel. Thus, when the reflection plate 116 is used, the thickness of the LED panel can be drastically reduced. In the example of FIG. 5, the thickness can be reduced to less than half of the conventional thickness.
The light diffusing plate 118 is made of polyethylene terephthalate (PET), polycarbonate, polypropylene, or the like, and is configured to have a function of uniformly radiating light incident from an oblique direction in all directions on the surface.

As shown in FIG. 1, an opening 115 for mounting a substrate is formed in advance on a bottom surface 113 on which a substrate 111 on which a point light source 112 made of LEDs is mounted, and wiring to the substrate 111 is guided. A groove 119 is formed on the back surface.
By configuring in this way, the wiring is not hidden from the light reflecting bottom surface 113 and the light reflection efficiency is not lowered, and the wiring can be wired more skillfully.
The light reflection light source 101 having a plurality of unit housings 102 having such a structure can be efficiently molded into a predetermined shape and with a predetermined dimensional accuracy by molding means including so-called vacuum molding and injection molding. Is possible.

2 (a) to 2 (c) show another embodiment of the light high reflection reflector light source according to the present invention. The light high reflection reflector light source 201 is tilted from the bottom surface 203 in each unit housing 202. FIG. An example in which a partition wall 205 is erected at each joint portion between the reflection surface 204 and the reflection surface 204 is shown.
As described above, the partition wall 205 is formed on each inclined surface 204 and the light diffusion plate 206 is supported, so that the light diffusion plate 206 is smoothly mounted on the upper surface of each unit housing 202 without being bent. Can do.

In the highly reflective reflector light source used in the illuminated switch and the surface emitting display device for amusement equipment of the first embodiment, the point light source 112 is W (white), R (red), G (green). And a point light source such as an LED (light emitting diode) emitting monochromatic light such as B (blue) or a combination of a plurality of point light sources.
In addition, a point light source such as an LED (light emitting diode) that emits monochromatic light such as W (white), R (red), G (green), and B (blue) using an LED control circuit (not shown). By adjusting the lighting timing of each single light source or a combination of multiple point light sources, it is possible to irradiate or blink a single color of white, red, green, or blue as well as their mixed color as appropriate. Can do.

In the highly reflective reflector light source used in the illumination type switch and the surface-emitting display device for amusement devices of the first embodiment, a plurality of legs 117 are attached at positions surrounding the opening 115 of the unit housing 102. However, the plurality of leg portions 117 are molded together with the reflector 116 by molding means including vacuum molding or injection molding, press working, etc., and this is performed by means such as adhesive or heat fusion in a later step. By coupling to the unit housing 102 or integrally forming with the housings 102 and 202, a product with good dimensional accuracy can be provided, and a significant cost reduction can be achieved.

In the first embodiment, as described above, the point light source 112 installed in the opening 115 of the unit housing 102 and the light emitting surface such as the light diffusing plate 118 arranged at a predetermined interval are disposed between the point light source 112 and the light emitting plate 118. The reflecting plate 116 is arranged via a plurality of legs 117, and the irradiation distance between the point light source 112 and the light emitting surface can be greatly shortened as shown in FIG.
Further, as described above, since the reflector 116 is interposed between the point light source 112 and the light emitting surface, the light concentration by the point light source 112 can be greatly dispersed and the point light source 112 can be dispersed. It is possible to switch to a wide area light source without reducing the amount of light.
The above description naturally applies to the second embodiment.

3 and 4, the path of light emitted from the point light source 112 will be described.
First, the light emitted from the point light source 112 and reflected by the back surface of the circular reflector 116 is reflected at the bottom of the unit housing 102 and attached to a position surrounding the opening 115 of the unit housing 102. The light is emitted from between the portions 117 to the outside of the reflector 116.
The reflection plate 116 is made of a material having a high light reflectance, and can be smooth and have fine unevenness. Therefore, peripheral diffusion with less attenuation is performed while controlling the light texture.
Thereafter, the light is divided into a light component transmitted through the light diffusing plate 118 and a light component reflected by particles in the light diffusing plate 118. Among them, the component light reflected toward the point light source 112 is regularly reflected from the light diffusing plate 118 and is incident on the light diffusing plate 118 again. Further, the component light that is incident on and transmitted through the light diffusing plate 118 radiates uniformly in all directions on the outer surface of the light diffusing plate 118.

The light in a conventional LED lighting device that does not use a reflector (FIG. 8) is glare (a glare is felt when there is intense light in the field of view, this phenomenon is called glare), and from the center toward the periphery. The brightness is greatly different.
On the other hand, since the light in the highly reflective reflector light source (FIGS. 6 and 7) used in the illuminated switch and the surface emitting display device for amusement devices of the present invention is light diffused by the reflector 116, it is glare light. In addition, the luminance does not decrease so much from the center toward the periphery, and therefore the illumination has a uniform luminance.
Of course, the light in the highly reflective reflector light source (FIGS. 6 and 7) used in the illumination type switch and the surface emitting display device for amusement devices of the present invention has little decrease in illuminance as a whole, and from the center to the periphery. The illumination switch of the present invention is compared with the conventional LED lighting device (FIG. 8) that does not use a reflector if the same area is illuminated because the illumination does not decrease so much toward the illumination. The distance between the point light source 112 and the light diffusing plate 118 can be shortened in the case of the highly reflective reflector light source (FIGS. 6 and 7) used in the surface emitting display device for amusement devices and the like.

According to the highly reflective reflector light source of the present invention, not only the above-described illuminated switch and surface emitting display device for amusement equipment, but also an automotive instrument panel and an advertising lighting panel that can obtain excellent display characteristics. As long as they do not depart from the spirit of the present invention, the present invention can be applied to other lighting devices using LEDs.

101 Light Reflector Light Source 102 Unit Housing 111 LED Board 112 Point Light Source 113 Chassis 114 Reflecting Surface 115 Opening 116 Reflecting Plate 117 Leg 118 Light Diffusing Plate 119 Guide Groove 201 Light High Reflecting Reflector Light Source 202 Unit Housing 203 Bottom 204 Inclination Surface 205 Partition wall 206 Light diffusion plate

Claims (3)

A bottom surface on which a substrate mounting opening is formed in advance, a substrate on which a point light source composed of LEDs is mounted is mounted on the opening, and a groove for guiding wiring to the substrate is formed on the back surface; , and a sloped surface to be irradiated from the bottom surface to the top surface of the light from a predetermined angle inclined to the point light sources, and is on the point light source of the bottom surface is supported by a plurality of legs, between the legs A circular reflector that allows light to pass through, and the reflector reflects the light from the point light source, and the light is radiated from between the plurality of legs to the outside of the reflector. A highly reflective reflector light source, wherein a plurality of unit housings arranged in parallel are provided, and a light diffusion panel is mounted on each housing at a predetermined interval. 2. The highly reflective reflector light source according to claim 1, wherein each housing has a partition wall standing upright at each joint portion between the inclined surface and the inclined surface. 3. The light height according to claim 1, wherein the light reflection light source having a plurality of unit housings is formed into a predetermined shape by a molding means including vacuum molding and injection molding. Reflective reflector light source.

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