JP2008004519A - Led illumination multipurpose device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem wherein, since illumination used for work or the like must have capability of uniformly illuminating a relatively wide range with sufficient brightness, when it is lit by using a generator because of the need to continuously supply large power, it causes a problem of noise or exhaust gas; although LED illumination is attracting attention as a solution thereof, brightness is restricted when cost is regulated at a certain value; and when brightness is daringly increased, irregularity due to directivity is generated. <P>SOLUTION: By using high-power LEDs different in emission angles, a nearby place is widely and brightly illuminated by increasing the emission angles, and illuminance is secured by the LEDs having small emission angles for a distant place. By arranging multiple LEDs on one light source plate according to this method, different beams are superposed on one another to increase brightness, and collide with one another to diffuse, whereby light can be made to reach the circumference, and as a result, a uniformly-bright multipurpose lamp applicable to various applications can be provided. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a light source part of an illumination device using an LED (light emitting diode) as a light source.

  Currently, railway track maintenance needs to be carried out during times when trains are not operating, that is, at night. In addition, restoration work on highways is often performed at night when the traffic is relatively low. In such situations, work lights with high illuminance are indispensable, so work lights that use metal halide lamps, mercury lamps, and halogen lamps as light sources are often used.

  White LEDs are becoming more efficient, and LEDs that have been mainly used for display until now are gradually being applied as light-emitting parts of lighting devices, that is, light sources. LED lighting that illuminates short distances, such as camera lighting and car interior lighting, has already been put into practical use, and products that take advantage of the advantages of LEDs, such as power saving and long life, have become popular. It is going.

  In addition, in search of brighter LEDs, high-intensity products called high-power LEDs have been developed, and high-efficiency LEDs that achieve high illuminance comparable to metal halide lamps have come to the market.

Problems to be solved by the invention

  There is no existing illumination that aims to illuminate a wide area uniformly and brightly like a working light, because of its brightness and cost.

  However, due to the rapid improvement in performance due to recent technological advances and the intensification of price competition due to the increase in the number of producers, high-power LEDs have been reduced in price. The time has come when lighting is considered practical enough.

  However, as the brightness of the LED is increased and the brightness is pursued, sharp directivity appears, and it is suitable for spot lighting, but is not suitable for work lighting that needs to brightly illuminate a wide area. It becomes a characteristic.

  In addition, a standard specification generally required for lighting devices such as work lights is that a uniform target illuminance must be obtained over the entire area within which illumination is provided.

  Therefore, it is required to illuminate a wide area by reducing the directivity of LED light emission. In this case, sufficient target illumination cannot be obtained.

Means for solving the problem

  The LED is a small point light source with a light emitting part diameter of about 5 millimeters, and these are arranged side by side on the light source plate to obtain the desired illuminance to form an illumination device.

According to the present invention, LEDs having different radiation angles are arranged side by side on a light source plate in this lighting device.

The LED group with a large radiation angle should illuminate the front, and the LED group with a small radiation angle should illuminate far away.

The invention's effect

  Uniform illuminance distribution over a wide area is realized by arranging LEDs with two or more radiation angles on the light source plate in consideration of the irradiation direction.

  Irradiation lights with different angles overlap and collide with each other, causing light superposition and scattering phenomena, so that a wider area can be illuminated uniformly and brightly.

When lighting up a certain area uniformly so as not to hinder the work, etc., it is necessary to irradiate multiple lighting devices from each direction so that the human shadow does not become a problem. However, according to the present invention, a sufficient effect can be obtained by installing at least one device facing each other.

As a shape that realizes [0010] to [0012], consider a light source plate in which LEDs are arranged vertically and horizontally as shown in FIG. For example, an LED with a large emission angle (for example, a half-value angle of 70 degrees) is arranged on the top of the light source plate so that the center line of the LED light is in the normal direction to the surface of the light source plate. At the same time, an LED with a small emission angle (for example, a half-value angle of 35 degrees) is arranged below the same light source plate so that the center line of the LED light is oriented in the normal direction with respect to the light source plate surface.

Thus, when the work illumination lamp having the light source plate shown in FIG. 1 is installed so as to irradiate the work place, uniform illumination light illuminates the work surface as shown in FIG. 2 by one illumination lamp. It will be.

  If LED lighting is used as a working light, it can solve various problems that it currently has, making use of its power saving, durable and environmentally friendly advantages.

The first power saving feature described in [0018] indicates that the battery can be sufficiently lit during the work, and the night work can be easily performed even in a residential area where noise is not an issue. Become so.

In addition, the advantages of battery operation are not limited to [0019]. When working in tunnels or places with poor ventilation, there is no need to use a generator, so there is no concern about air pollution, and work efficiency is significantly increased. It becomes.

Furthermore, it can be moved anywhere and can be used for various purposes such as gatherings, sports, festivals, and events at night.

In addition, LEDs are resistant to changes in atmospheric pressure and temperature, and have a long lifespan, so maintenance costs can be reduced and, in turn, products that are friendly to the global environment, so there is nothing to deny industrial applicability. I can say that.

Example of array of light source plates for LED lighting multipurpose device Illumination example of LED lighting multipurpose device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Light source plate of LED illumination multipurpose apparatus 2 Arrangement of LED group with small emission angle 3 Arrangement of LED group with large emission angle 4 Light source plate support bearing bracket 5 Light source plate support shaft 6 Light source plate of LED illumination multipurpose apparatus 7 Light source plate support shaft 8 Light source plate support base 9 Light emitted from LED group with small emission angle 10 Light emitted from LED group with large emission angle

Claims (1)

  A multipurpose lighting device that can irradiate a wide range uniformly by arranging a plurality of two or more types of LEDs (light emitting diodes) having different radiation angles and using them as a light source.

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