JP4228408B2 - Lamp unit structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lamp unit structure such as an indoor lamp for automobiles and various display lamps, and in particular, a lamp that requires a plurality of outgoing light angles can be obtained with a simple structure, and the brightness uniformity of the lamp is also improved. The present invention relates to a uniform lamp unit structure.
[0002]
[Prior art]
Conventionally, filament-type lamps, halogen lamps, and the like have been used as automotive interior lamps and various display lamps. These lamp unit structures have a light source lamp as shown in FIG. 2 and a reflector molded product 1 having a reflecting function and a lamp lens 3 on the front side, and the light source lamp 2 and the reflector molded product 1 are provided adjacent to the lamp lens 3 in view of the necessity.
[0003]
When two or more directions of light emitted from the light source lamp are required, as shown in FIG. 4B, a number of light source lamps 2 and 2 corresponding to the emission direction are additionally provided, and a predetermined direction is provided. The structure is a reflector molded product 3 formed into a shape that allows light to travel through.
[0004]
[Problems to be solved by the invention]
However, in the lamp unit shown in FIG. 4 (b) described in the prior art, the thickness of the reflector molded product 3 is increased and the number of light source lamps 2 is increased. Had the problem of becoming thicker.
[0005]
Further, since the reflector molded product 3 is close to the light source lamp 2, it becomes high temperature, and in the case of a reflector for an automobile, a material having high heat resistance such as polycarbonate must be used, and the reflection efficiency is increased. In order to increase the thickness of the reflector molded product 3, an aluminum vapor deposition film is formed on the reflection surface. In order to prevent the aluminum vapor deposition film from being degraded by heat and reducing the reflection efficiency, the aluminum vapor deposition film is protected. A coating was also necessary, and the manufacturing cost was high.
[0006]
The present invention has been made in view of the above-described problems of the prior art, and can manufacture a lamp that requires a plurality of outgoing light angles at a low cost, and has a lamp unit structure with uniform lamp brightness uniformity. The purpose is to provide.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the invention described in claim 1 is directed to a light source unit incorporating a light source lamp, a light emitter unit, and light output from the light source unit disposed between the light source unit and the light emitter unit. A lamp unit structure including an optical fiber led to a light emitter unit, wherein the light emitter unit distributes light emitted from the optical fiber uniformly to a plurality of planar light emitters. And a plurality of planar light emitters, which are arranged adjacent to the light distributor and have reflection structures with different reflection angles on the reflection surface opposite to the light emission surface, to form a multilayer. .
[0008]
According to a second aspect of the present invention, in the first aspect of the invention, the reflecting surfaces of the light distributor and the planar light emitter are separated from the light incident surface of the light distributor and the planar light emitter. According to this, the structure is characterized in that the reflectance is increased.
[0009]
The invention according to claim 3 is the invention according to claim 1 or 2, wherein the reflecting surface structure of the light distributor and the planar light emitter is formed in a V-shaped uneven shape parallel to the side surface on the light incident side. In addition, planar light emitters having different inclination angles of the V-shaped concavo-convex shape are laminated in multiple layers.
[0010]
According to the present invention, since the optical fiber guides the light output from the light source unit to the planar light emitter via the light distributor in the light emitter unit, the light source unit and the planar light emitter can be separated. The lamp unit can be made more compact, and a plurality of planar light emitters with reflecting structures with different reflection angles on the reflecting surface opposite to the light emitting surface are stacked to form a multilayer. It is possible to change the angle of the emitted light and supply the emitted light in a plurality of directions at the same time, and it is possible to inexpensively manufacture a lamp that requires a plurality of emitted light angles.
[0011]
In addition, the reflection surface of the light distributor and the planar light emitter has a structure in which the reflectance is increased as the distance from the light incident surface of the light distributor and the planar light emitter is increased, thereby the planar light emitter. The brightness of the emitted light from can be made uniform.
[0012]
Further, the structure of the reflecting surface of the light distributor and the planar light emitter is formed in a V-shaped concavo-convex shape parallel to the side surface on the incident side, and the planar illuminator having different inclination angles of the V-shaped concavo-convex shape By laminating the layers, the direction of the emitted light can be changed to a predetermined direction by changing the inclination angle of the V-shaped concavo-convex shape.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of a lamp unit structure according to the present invention will be described in detail with reference to FIGS. 1 to 3.
[0014]
FIG. 1A is a perspective view showing an overall configuration of a lamp unit structure according to the present invention, and FIG. 1B is a perspective view showing a configuration of a planar light emitter having a multilayer structure in FIG. 1 (c) is an enlarged cross-sectional view of a main part of the planar light emitter in FIG. 1 (a), and FIG. 2 shows a configuration in which the light distributor and the planar light emitter are integrated in the lamp unit structure according to the present invention. A perspective view and FIG. 3 are graphs showing luminance directivity test data.
[0015]
In FIG. 1A, the lamp unit is generally composed of a light source unit 10, a light emitter unit 20, and an optical fiber 30 connecting them.
[0016]
More specifically, the light source unit 10 includes a light source lamp 11 therein, and one end of an optical fiber 30 is connected to the light source unit 10 side in order to supply light from the light source unit 10 to the light emitter unit 20. The other end of the optical fiber 30 is connected to the light emitter unit 20.
[0017]
Specifically, the light emitter unit 20 includes a plurality of light distributors 40 that receive light emitted from the optical fiber 30, and a planar light emitter 50 having a multilayer structure that is installed adjacent to the light distributor 40. ing.
[0018]
In this embodiment, the dimension of the molded product of the planar light emitter 50 is set to a width of 50 mm, a length of 150 mm, and a thickness of 5.5 mm. The reflective method is changed to a reflective structure by a dot pattern method by silk printing, and the planar light emission is performed. As shown in FIG. 1 (b), the cross-sectional structure of the body 50 is a triangular groove shape in which the reflection surface is formed into V-shaped uneven shapes 51 and 52, the V-shaped width is 65 μm, and the depth is 15.5 μm. Is set to
[0019]
Further, the V-shaped concavo-convex shapes 51 and 52 of the planar light-emitting body 50 are changed in angle as shown in FIG. 1C, the inclination angle of the V-shaped concavo-convex shape 51 on one side is 27 °, and the other side The V-shaped concavo-convex shape 52 has an inclination angle of 23 °, and a diamond cutter tool capable of processing this shape is manufactured. Using a diamond turning mold processing machine, a quadratic function shown on the phosphor bronze metal block surface is expressed by the following equation: Using the equation, the groove was formed by a method in which the pitch becomes narrower as the distance from the light incident side increases.
[0020]
Y = 0.015297X ² −3.660860X + 278.6 (1) In the formula (1),
Y: groove pitch (μm)
X: Distance from the light source side groove starting origin (mm)
In this embodiment, a method is used in which the pitch is changed and the reflectance is increased as the distance from the light incident portion is increased. Alternatively, a method of increasing the reflectance by changing the groove depth is also conceivable.
[0021]
In addition to the linear shape, for example, a quadrangular pyramid or a cone can provide the same effect.
[0022]
That is, it is a measure performed to equalize the light emission luminance from the planar light-emitting body 50, and the pitch and the like do not need to be changed when the uniformity is not important.
[0023]
Using this processed phosphor bronze model, this shape was transferred to one side of an acrylic plate by hot press molding. FIG. 2 shows a cross-sectional shape of the molded product thus manufactured.
[0024]
The origin of the V-shaped grooving is a pitch formed by the above quadratic function from a position 5 mm from the light incident surface. Each molded product made by this hot press molding method was overlaid as shown in FIG. In the embodiment, the planar light emitter 50a having an inclination angle of 23 ° is directed downward, and the planar light emitter 50b is overlaid thereon.
[0025]
A white PET film 53 was disposed on the reflective surface (opposite surface of the emission surface) on the back surface of the planar light emitter 50b in order to increase the reflection efficiency. For mass production, it is possible to make an electroforming mold from this model to make an injection mold.
[0026]
Next, the light distributor 40 was also made uneven by the same method. The V-groove pitch uses the above-mentioned quadratic function and requires a V-groove for reflection on the width 50 mm on the light incident side of the planar light emitter 50, so the length is 55 mm, the width is 5.5 mm, and the thickness is 5.5 mm. It was.
[0027]
The V-shaped concavo-convex shape of the embodiment is the same shape as the planar light emitter 50a, but is not limited to this in order to increase the reflection efficiency.
[0028]
Similarly, a white PET film 54 was disposed in order to increase the reflection efficiency.
[0029]
Instead of the white PET film 54, a V-shaped uneven surface may be coated with a metal film by vapor deposition or sputtering.
[0030]
Further, in order to prevent light leakage from the side surface, an aluminum-deposited film may be attached to three surfaces other than the light incident surface.
[0031]
In the embodiment, it is separated from the planar light emitter 50, but can be integrated as shown in FIG.
[0032]
Next, in order to measure the luminance of the light source emitted from the planar light emitter 50, an experiment using the following test equipment was performed.
[0033]
The light source unit 10 uses FIBER ILLUMINATOR SO-50 (trade name, manufactured by Seiwa Optical Co., Ltd.). The light source lamp 11 is a halogen lamp having a voltage of 12 V, 50 W, and an illuminance of 260,000 lux. Used was PLGC1-3L1000 made of quartz glass (trade name, manufactured by Hayashi Watch Industry Co., Ltd., inner diameter: 3 mm, length: 1 m).
[0034]
With these combinations, the light from the light source unit 10 was supplied to the planar light emitter 50, and the luminance was measured.
[0035]
As a result, when the light source is supplied to the planar light emitter 50a, the luminance directivity shown in FIG. 3A is shown, and when the light source is supplied to the planar light emitter 50b, the light source shown in FIG. The luminance directivity shown in FIG.
[0036]
That is, it was confirmed that the angle of light emitted from the planar light emitter 50 with the inclination angle of 27 ° of the V-shaped groove was 38 °, and that there was a luminance peak at 47 ° at 23 °.
[0037]
【The invention's effect】
As described above, according to the present invention, the optical fiber guides the light output from the light source unit to the planar light emitter via the light distributor in the light emitter unit. Since the lamp unit can be made compact and the light emitting surface can be made compact, a plurality of planar light emitters with reflecting structures with different reflection angles on the reflecting surface opposite to the light emitting surface are stacked to form a multilayer. By changing the angle, it becomes possible to change the angle of the emitted light and to supply the emitted light in a plurality of directions at the same time, and it is possible to inexpensively manufacture a lamp that requires a plurality of emitted light angles.
[Brief description of the drawings]
1A is a perspective view showing an overall configuration of a lamp unit structure according to the present invention, FIG. 1B is a perspective view showing a configuration of a planar light emitter having a multilayer structure in FIG. FIG. 2 is an enlarged cross-sectional view of a main part of a planar light emitter in (a).
FIG. 2 is a perspective view showing a configuration in which a light distributor and a planar light emitter are integrated in a lamp unit structure according to the present invention.
FIG. 3 is a graph showing luminance directivity test data of a lamp unit structure according to the present invention.
4A is a schematic sectional view showing a conventional lamp unit structure, and FIG. 4B is a schematic sectional view showing a conventional lamp unit structure using two light source lamps.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Reflector molding 2 ... Light source unit 3 ... Lamp lens 10 ... Light source unit 11 ... Light source lamp 20 ... Light emitter unit 30 ... Optical fiber 40 ... Light distribution body 50a, 50b ... Planar light emitter 51, 52 ... V-shaped unevenness Shape 53 ... White PET film 54 ... PET film

Claims (3)

Lamp unit structure comprising a light source unit having a built-in light source lamp, a light emitter unit, and an optical fiber disposed between the light source unit and the light emitter unit for outputting light output from the light source unit to the light emitter unit The light emitter unit is disposed adjacent to the plurality of light distributors for uniformly distributing the light emitted from the optical fiber to the plurality of planar light emitters. A lamp unit structure characterized in that a plurality of planar light emitters each having a reflection structure with a reflection angle different from each other on a reflection surface opposite to an emission surface are stacked to form a multilayer. 2. The reflection surface of the light distributor and the planar light emitter has a structure in which the reflectance increases as the distance from the light incident surface of the light distributor and the planar light emitter increases. Lamp unit structure. The reflection surface structure of the light distributor and the planar light emitter is formed in a V-shaped concavo-convex shape parallel to the side surface on the light incident side, and the planar light emitters having different inclination angles of the V-shaped concavo-convex shape are multilayered. The lamp unit structure according to claim 1 or 2, wherein the lamp unit structure is provided.

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