JP5738083B2 - LED light - Google Patents

Description

  The present invention relates to an LED light that can be applied to high ceilings, street lamps, construction sites, and other general lighting in factories, warehouses, large stores, exhibition halls, gymnasiums, and the like.

  In an incandescent lamp or a fluorescent lamp, it is common to use an umbrella-shaped reflector to increase the illuminance.

  The LED has a straight traveling property and has a problem that its diffusion effect is small even if a reflector is used because light diffusion is narrow.

  However, recently, an LED module having a light distribution angle of 120 ° in which an LED chip and a lens are integrally combined has been developed, and an LED light source module serving as a light source is provided by arranging a plurality of LEDs (Patent Literature). 1).

  According to such an LED light source module having a large light distribution angle, it is effective to use a reflector in order to increase the illuminance when used.

  Therefore, when a test was performed at a height of 6 m using a general frustoconical reflector, an illuminance of about twice was obtained.

JP 2010-283344 A

  However, there is a lack of improvement in illuminance at twice the illuminance. In order to further increase the illuminance, it is necessary to make the light source by the LED high power. However, if the light source is made high power, the amount of heat generation becomes large. Therefore, the heat dissipation structure of the LED mounting part becomes extremely large and the whole structure is huge. There is a problem of becoming.

  In order to solve such problems, we decided to repeat the experiment of the reflector to obtain the magnification of further illuminance.

  Therefore, the present invention provides an LED light source module having a wide light distribution angle of 90 ° or more by attaching a plurality of LED chips combined with a lens, and having a polygonal frustum-shaped inner surface as a polyhedron having a mirror surface, and a lower side (narrower) of the polygonal frustum shape. A reflector having a height that is longer than the difference between the length (diameter) of the mouth side and the length (diameter) of the upper side (wide mouth side) is configured, and the LED light source module is installed at the bottom base of each mirror surface of the reflector. The LED light source module is arranged at a position where an entire view of light can be captured.

  According to the present invention, as a result of an experiment using the LED light source module for the polygonal reflector according to the above conditions, it was possible to obtain an illuminance several times larger than the illuminance when the reflector was not used.

The perspective view which shows Example 1. Cross-sectional explanatory drawing Explanatory diagram showing an example of the principle Explanatory drawing which shows an example of LED light source module Explanatory drawing of light reflected on the reflector Cross-sectional explanatory drawing of Example 2 which attached the lens diffusion plate Illustrating lighting conditions

  Embodiments according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a perspective view showing Example 1, FIG. 2 is a cross-sectional explanatory view, and FIG. 3 is an explanatory view showing an example of the principle.

  In the figure, reference numeral 1 denotes an umbrella-type reflector, which is an octagonal pyramidal octahedron having eight mirror surfaces 2.

  In this embodiment, as shown in FIG. 3, the angle of the umbrella shape of the reflector is 20 ° on one side and 40 ° on both sides. As a result of the experiment, there was a tendency for the illuminance to decrease if the angle was too large or too small, and a decrease in illuminance was seen even if this angle changed ± 1 °. In the present example, a good illuminance was obtained at an angle of 40 ° shown in FIG.

  The height of the reflector 1 is such that the length (diameter) that the lower (narrow mouth side) mirror surface 2 of the octagonal pyramid faces is opposite to the length (diameter) that the upper (wide mouth side) mirror surface 2 faces. The height is longer than the difference. In this embodiment, as shown in FIG. 3, the lower length is 160 mm, the upper length is 305 mm, and the height is 165 mm. Note that the truncated pyramid with the above angle naturally reduces the length of the upper side when the lower length is reduced, and each dimension is set at the same ratio as the above dimensions by determining any value including the height dimension. It is determined.

  In addition, when it is not necessary to obtain the highest illuminance, the height of the reflector may be set to a value lower than the above condition, and the reflector can be made a thin reflector by an amount smaller than that, thereby limiting the installation conditions on the site. Can be reduced.

  Although this reflector is an octagonal frustum in the above description, there is an improvement in illuminance in a desired range for any number of angles between the hexagonal frustum and the sixteenth pyramid, but according to experiments, the octagonal frustum includes the light quality. The best results were obtained.

  The reason for this is that lighting requires not only brightness but also quality of light. In the reflected light from a pyramidal trapezoidal reflector, the inner corner (entrance corner) of the pyramid is striped to create reflected light. As it appears, the illuminance increases as the number of corners increases, but the stripes of the inner corners increase, and the light quality of the entire illumination light decreases. Also, the illuminance magnification decreases as the number of corners decreases.

  According to the experiment, the illuminance (unit Lx) is the number of pyramidal trapezoidal surfaces × reflectance of the reflector surface. In this embodiment, the reflectance of the reflector surface is 0.95, × 0.95 = 7.6. In other words, the illuminance was 7.6 times that without the reflector. In the experiment, the illuminance immediately below 6 m was measured.

  Reference numeral 3 denotes an LED light source module. As shown in FIG. 4, a plurality of LEDs 4 having a wide light distribution angle in which a lens is combined with an LED chip are arranged. In this example, a 60 W LED light source module (KG70A light distribution angle of 120 °) was used using a wide light distribution angle LED manufactured by National Metal Technology Co., Ltd., Taiwan. In addition, according to the experiment, the effect of expanding the desired irradiation area by the reflector was obtained when the LED light source module had a light distribution angle of 90 ° or more.

  The LED light source module 3 is attached to a heat sink 5 having a heat dissipation function. The heat sink 5 is installed in the opening on the lower side (narrow mouth side) of the reflector 1. In an actual product, a cover 6 is provided outside the reflector 1, and the reflector 1 and the heat sink 5 are attached to the cover 6 so as to be integrated. The LED light source modules having various light distribution angles can be exchanged and attached to the heat sink by manufacturing them with the same standard of the structure for attaching to the heat sink.

  The installation position of the LED light source module 3 on the reflector 1 is the lower (narrow mouth side) opening, but as shown in FIG. 5, the light 3A of the LED light source module 3 is the lower end of each surface of an octagonal truncated cone. Place it at a position where you can see the full view of the light at the base.

  According to the above LED light, since the illuminance of the LED light source module can be greatly improved by the reflector, a large illuminance can be obtained with a small light source by using the reflector of the polygonal frustum shape, and the heat generation of the LED light source The amount does not increase, and it is possible to simultaneously obtain a large illuminance and a wide irradiation area with a small LED light source device.

  The LED light having the above configuration can be sufficiently used as an outdoor lamp and an indoor lamp, but as described above, a stripe pattern with an octagonal pyramid shape is generated in the reflected light of the reflector. Even if this striped pattern exists, it can be used for general use. However, if you want to erase or thin the striped pattern in order to improve the light quality, you can also use the LED light as an irradiation surface. However, there is a case where it is required to improve the quality of the light by making the edge of the outline not clear.

  Therefore, in this embodiment, the entire upper opening (wide mouth side) of the reflector 1 is covered with a lens diffusion plate 7 as shown in FIG. In this embodiment, the cover 6 is covered by attaching a lens diffusion plate 7 to the opening end. In this embodiment, the lens diffusing plate is integrated with the acrylic plate and attached to the opening end of the cover 6.

  In this embodiment, the lens diffusing plate 7 is manufactured by Optical Solution, Inc., USA.

  As a result, the illuminance directly under the light source is reduced by about 20%, but since the light is dispersed by the lens diffuser plate, the generation of the stripe pattern is eliminated, and the glare is reduced, so that the quality of the light is not uncomfortable. Become.

Furthermore, the light distribution angle is about 100 degrees due to the configuration of the reflector and the LED light source module. However, by attaching the lens diffusion plate 7, (light distribution angle by the reflector) ² + (the lens diffusion plate (Diffusion angle) The square root of ² is the light distribution angle, and the illumination light is further spread and the contour line of the irradiated surface disappears, and the edge of the irradiated surface becomes brighter and the light quality is greatly improved. Moreover, the generation of multi-shadows (plural shadows) peculiar to LED lights could be eliminated.

  Thereby, for example, when the 60 W LED light source module and the octagonal truncated pyramid reflector are used, the illuminance and light distribution angle equal to or higher than those of the conventional mercury lamp 400 W can be obtained, and the power consumption is about 1/7. Thus, the electrical energy saving effect is great.

  In addition, since the light distribution angle is wide, the number of installed lamps can be reduced when a large area is irradiated (see FIG. 7).

DESCRIPTION OF SYMBOLS 1 Reflector 2 Mirror surface 3 LED light source module 3A Light of LED light source module 4 LED
5 Heat sink 6 Cover 7 Lens diffuser

Claims (3)

A plurality of LED chips combined with a lens are attached to form an LED light source module having a wide light distribution angle of 90 ° or more, an octagonal truncated pyramid with an angle of 40 ° forms a reflector with a mirror surface, and each mirror surface of the reflector LED lights light panoramic view of the LED light source module with only the root portion of the LED light source module disposed at a position can proceed respectively, characterized in that covered the entire opening of the reflector a lens diffuser. According to claim 1, LED light, characterized in that the height of the longer dimension than the difference in length of the root portion of the 8 truncated pyramid (diameter) and length of the opening (diameter). The LED light according to claim 1, wherein a light distribution angle of the LED light source module is 120 °.

Images