JP2001291901A - Lighting fitting and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting fitting where utility efficiency of illumination light and electric power is superior and reduction of manufacturing cost is enabled by simplifying a structure, including the lenses. SOLUTION: In this lighting fitting, a plurality of LEDs are arranged facing a prescribed direction and being capable of lighting, at least light emitting parts of the LEDs are buried in lenses, and directivity of the LEDs is controlled by the lenses. By using the LEDs as light sources and burying the light emitting parts of the LEDs in the lenses, utility efficiency of illumination light and electric power can be improved, heating value and temperature rise can be restrained when the LEDs are lit, and a structure of the lighting fitting, including illumination light lenses can be simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device which can be used as a room light, a headlight of a car, and the like, and a method of manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, lighting fixtures using incandescent lamps or fluorescent lamps as interior lights or headlights of automobiles have been used. Illumination light from incandescent lamps and fluorescent lamps has a large amount of light and is 360 degrees omnidirectional. Therefore, when these are used as a light source in a lighting fixture, a reflector is provided, and the required area is mainly illuminated. If necessary, a lens is provided in front of the light source at a predetermined distance, and the illumination light is controlled to have directivity.

[0003]

However, in lighting equipment using an incandescent lamp or a fluorescent light, illumination light that cannot be controlled by the reflector is wasted and the conversion ratio of electric power to light is low. Inefficient. In addition, since the amount of generated heat is large and the vicinity of the light source reaches a very high temperature, a lens for controlling the illumination light provided when it is necessary to illuminate a required area must be provided at a place away from the light source by a predetermined distance. The structure is complicated, and it is difficult to reduce the manufacturing cost.

[0004] The present invention has been made in view of the above problems, and is excellent in the use efficiency of illumination light and electric power.
An object of the present invention is to provide a lighting apparatus and a manufacturing method thereof, which can simplify a structure including a lens and reduce manufacturing cost.

[0005]

According to the lighting apparatus of the present invention, a plurality of LEDs are arranged so as to be turned on in a predetermined direction, and at least a light emitting portion of the LEDs is embedded in a lens. The directional direction is controlled by the lens. Use LED as light source and LED
By embedding the light emitting part of the lens in the lens, it is possible to make a lighting device that integrates the illumination by the light source and the lens function in a complex manner, so that the efficiency of using the illumination light and the power can be improved, In addition to suppressing the rise in temperature, it is possible to simplify the structure of the lighting equipment including the lens.

Further, in the above-mentioned lighting equipment, the lens is made of resin. By using LED as a light source, the lens can be made of resin,
In addition, since it is made of resin, a lens of a desired design can be easily formed in the manufacturing process.

Further, in the above-mentioned lighting equipment, the LED
Are arranged in a substantially donut shape. By disposing the LEDs in a donut shape, it is possible to further suppress the temperature rise and the amount of generated heat during lighting.

Further, in the method of manufacturing a lighting fixture according to the present invention, a plurality of LEDs are disposed so as to be turned on in a predetermined direction.
At least a light emitting portion of the LED is embedded in a resin lens, and the directional direction of the LED is controlled by the lens. The formation of the lens is performed in a step of curing the resin lens. By embedding the light emitting part of the LED in the lens and forming the lens of a required shape in the step of curing the resin lens, the above-mentioned lighting fixture can be easily manufactured, and the manufacturing process can be simplified and the manufacturing cost can be reduced. .

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A lighting fixture according to the present invention will be described below with reference to a specific embodiment shown in the drawings. FIG. 1 is a plan view showing a lighting fixture according to the present invention, and FIG. 2 is a longitudinal sectional view showing the lighting fixture of FIG.

In the lighting fixture 1 shown in FIGS. 1 and 2, L
A plurality of LEDs 3 each having a light-emitting portion 3a are arranged on the ED substrate 2 in a substantially donut shape in a predetermined direction.
The LEDs 3 arranged on the ED board 2 can be turned on by a power supply and a power supply board not shown in the figure. A heat radiating plate 4 is provided on the side of the LED substrate 2 opposite to the side on which the LEDs 3 are provided, in order to enhance the heat radiating function, so that the amount of heat generated when the LEDs 3 are turned on can be efficiently radiated.

The entirety of the plurality of LEDs 3 arranged is buried in a substantially hemispherical lens 5 formed of a resin such as a silicone resin. Lighting equipment 1 on lens 5
A predetermined design is applied to irradiate required illumination light from the whole, and a curved surface 5a is formed outside, a curved surface 5b is formed in the middle, and a curved surface 5c is formed inside through the step portions 50a and 50b. The refractive index n of the lens 5 in this embodiment is 1.5
The radius of curvature r of the curved surface 5a is 34.5 mm, and the focal length f of the lens 5 is 69 mm.

Since the entirety of the plurality of LEDs 3 arranged as described above is embedded in the lens 5, the light emitting portion 3a of the LED 3 is also entirely embedded in the lens 5. For this reason, the illumination light emitted from the light emitting portion 3a of the LED 3 is transmitted through the lens 5 and radiated to the outside. At the time of transmission, the directional direction of the illumination light is controlled by the lens 5 having a predetermined design. Illumination light can be applied to the outside.

In the case of manufacturing the luminaire 1, for example, in a step of putting a resin to be a lens into a mold and curing it, the resin is poured into a mold having a required shape and cured to form a lens, and the lens is poured. LE in the resin before curing
D3 is inserted, and after the resin is cured, if the LED 3 is manufactured so as to complete the embedding of the LED 3 in the lens 5 and the formation of the lens 5 of a required shape, the lighting fixture 1 can be obtained in an easy and simplified manufacturing process. And the manufacturing cost can be reduced.

The luminaire 1 in this embodiment is a preferred example of the luminaire of the present invention.
Can be made of glass as long as it has the required transmittance, durability, etc., and if the temperature rise is within an allowable range in relation to the life of the LED 3, etc.
3 may be arranged densely as a whole. The arrangement area of the plurality of LEDs 3 is not limited to a substantially circular donut shape, and forms an area where the LEDs 3 are arranged at predetermined intervals.
Alternatively, any arrangement can be used as long as the temperature can be suppressed, for example, a polygonal donut shape in the arrangement area. Also, the LED 3 of the lighting fixture 1 in the present embodiment is a lamp-shaped LED 3.
However, the present invention is not limited to this, and an appropriate LED such as a chip-type LED can be used as long as a required amount of light can be obtained depending on the application. In addition, as a method of manufacturing the lighting fixture 1, an appropriate manufacturing method other than the above-described preferable manufacturing method can be performed.

The lighting fixture 1 of the above embodiment has a light source L
Since the ED 3 is used, the efficiency of using illumination light and electric power is excellent, and the amount of heat generated during lighting and the temperature rise can be suppressed. Further, since the LED 3 as a light source and the lens 5 are integrated,
For example, a lighting fixture 1 including a lens 5 is different from a lighting fixture in which a separate lens is disposed at a predetermined distance in front of an incandescent lamp.
The structure is simplified, and the manufacturing cost can be greatly reduced by integrally forming the structure in terms of manufacturing.

Since the luminaire 1 uses the LED 3 as a light source, the amount of heat generated at the time of lighting and the rise in temperature can be suppressed, so that the light source and the lens 5 can be integrated by closely contacting the lens 5 and the like. 5 can be made of resin such as silicon resin. Therefore, it is extremely easy to perform required design and processing on the lens 5, and it is possible to facilitate the manufacture and reduce the manufacturing cost.

In the case where a plurality of LEDs 3 are densely arranged, the temperature substantially reaches the center of the arrangement area, so that the LEDs 3 are arranged in a substantially donut shape as in the lighting fixture 1 of this embodiment. Thus, the temperature rise and the amount of generated heat when the lighting fixture 1 is turned on can be further suppressed, and the life of the lighting fixture 1 can be prolonged.

[0018]

The lighting fixture of the present invention has a structure in which a lens is integrated with a light source using an LED as a light source.
This is advantageous in that the use efficiency of illumination light and power is excellent, the amount of heat generated during lighting and the temperature rise can be suppressed, and the structure including the lens can be simplified to reduce the manufacturing cost.

Further, since the lighting apparatus uses an LED having a predetermined directivity as a light source, the lighting voltage is low.
This has a significant advantage in that it can provide gentle illumination light that has a long life and diffused light is not directly in the eyes.

In the step of curing the resin lens, L
By embedding the light emitting part of the ED in the lens and forming the lens of the required shape to manufacture the lighting fixture of the present invention, the manufacturing process can be simplified and the manufacturing cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a plan view showing a lighting fixture according to the present invention.

FIG. 2 is a longitudinal sectional view showing the lighting fixture of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lighting fixture 2 LED board 3 LED 3a Light emitting part 4 Heat sink 5 Lens 5a, 5b, 5c Curved surface 50a, 50b Step part

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Claims (4)

[Claims] 1. A plurality of LEDs are provided so as to be turned on in a predetermined direction, and at least a light-emitting portion of the LEDs is embedded in a lens, and the directivity of the LED is controlled by the lens. Lighting equipment featuring. 2. The lighting apparatus according to claim 1, wherein said lens is made of resin. 3. The lighting fixture according to claim 1, wherein a plurality of the LEDs are arranged in a substantially donut shape. 4. A plurality of LEDs are disposed so as to be turned on in a predetermined direction, and at least a light emitting portion of the LEDs is embedded in a resin lens, and the directional direction of the LEDs is controlled by the lenses. A method of manufacturing a lighting fixture, comprising:
A method of manufacturing a lighting fixture, wherein the embedding of the light emitting portion of D in the lens and the formation of the lens of a required shape are performed in a step of curing the resin lens.