JPH0624867Y2 - Fluorescent emitter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a fluorescent light emitting body, and more specifically to a fluorescent light emitting body having surface light emission with excellent visibility.

[Prior Art] Conventionally, as shown in FIG. 6, as a light emitting body, there is known a clearance monitor 11 'arranged particularly on the front side portion of a fender 14 of an automobile. The clearance monitor 11 'has a light bulb (not shown) in its body, and the light emitting surface 13 is a surface that is substantially parallel to the surface of the fender 14 (12 in the drawing is a reflection cover. ) Or irradiating light to the light emitting surface with an optical fiber is known. Further, as the surface light emitter, an LED, or one that directly irradiates light such as electroluminescence is known.

[Problems to be Solved by the Invention] Since the light emitted from the light emitter is almost the same on all surfaces, the above-mentioned light emitter has a drawback that the driver has low brightness and it is difficult to confirm lighting. It was

The present invention overcomes the above-mentioned drawbacks, and an object of the present invention is to provide a fluorescent light emitting body in which the light emitted in a predetermined direction is made stronger than the light emitted in other directions, and the visibility is improved.

[Means for Solving the Problems] The fluorescent light-emitting body of the present invention comprises a resin plate-shaped fluorescent light-emitting portion containing a fluorescent dye and a space between at least central portions of the upper and lower surfaces of the fluorescent light-emitting portion. It is characterized by comprising a transparent resin body laminated on the upper and lower surfaces of the fluorescent light emitting portion and a light emitting source provided on the lower surface side of the lower transparent resin body.

The fluorescent dye to be used is selected from those having various colors, absorption wavelengths, etc. depending on the purpose and application. It is particularly preferable that this has a high efficiency of absorbing a predetermined incident light and converting it into fluorescence. For example, as the fluorescent dye, naphthalimide-based fluorescent dye (“Violet 570”, manufactured by BASF-Japan Co., Ltd.), perylene-based fluorescent dye (“Yellow 08”).
3 "," Orange 240 "," Red 300 "," Red 339 ", BASF-Japan Co., Ltd., etc. can all be used.

Here, the resin plate-like plate shape of the fluorescent light emitting portion means a normal plate, sheet, or the like having a larger area of the upper surface and the lower surface with respect to the area of the outer periphery. For example, when the area of the outer peripheral surface of a regular cube having the same sides is 1, the sum of the areas of the upper surface and the lower surface corresponds to 0.5. When the plate shape is defined by such a definition, the plate shape of the fluorescent light emitting part of the present invention has an outer peripheral surface area of 1
In such a case, the sum of the areas of the upper surface and the lower surface is preferably 2.5 or more. That is, the thinner the fluorescent light emitting portion, the stronger the characteristic of the fluorescent light emitting body of the present invention. When the area of the outer peripheral surface of the fluorescent light emitting portion is 1, a fluorescent light emitting portion whose sum of the areas of the upper surface and the lower surface is about 2.5 is used, and the total reflectance on the upper surface and the lower surface of the fluorescent light emitting portion is Assuming about 60 to 70%, the emission luminance of the outer peripheral surface is about 1.5 to 1.8 times the emission luminance of the upper and lower surfaces.

[Operation] When the linear light such as sunlight, electric light, diffused light and various surrounding light rays are mainly incident on the fluorescent dye contained in the fluorescent light emitting body from the upper and lower surfaces of the fluorescent light emitting body, the fluorescent dye emits the light. To emit fluorescence. This fluorescence is totally reflected at the interface between the upper surface and the lower surface of this fluorescent light emitting portion that makes an interface with air,
The fluorescence is emitted from the outer peripheral surface of the fluorescence emitting portion in a dense state. This concentrated fluorescent light emitted from the outer peripheral surface of the fluorescent light emitting portion is visually recognized by a driver or the like.

[Examples] Hereinafter, the present invention will be described with reference to Examples.

(Embodiment 1) A perspective view of a fluorescent light emitting body according to this embodiment is shown in FIG. 1, a vertical sectional view thereof is shown in FIG. 2, and an enlarged sectional view of a main part thereof is shown in FIG. This fluorescent light emitter is applied to a clearance monitor.

When the area of the outer surface of the luminescent material contains a perylene-based fluorescent dye and the area of the outer surface is 1, the sum of the areas of the upper and lower surfaces is about 1.
A resin plate-shaped fluorescent light emitting portion (polymethylmethacrylate) (PMMA) or polycarbonate resin, which is 0, is provided. Transparent resin bodies 2 and 3 (made of PMMA resin) made of a transparent resin containing no fluorescent paint are arranged on the upper surface side and the lower surface side of the fluorescent light emitting portion 1, and the light emitting portion 1 and the transparent portions are transparent. Air layers 4a and 4b (FIG. 3) made of air (medium) are formed between the resin bodies 2 and 3. Furthermore, at least the outer peripheral surface 2 on the viewing side
In a, 1a (FIG. 3), there is no air layer, and the fluorescent light emitting section 1 and the transparent resin bodies 2 and 3 are in close contact with each other so as to have an excellent appearance. Each of the air layers 4a and 4b is composed of the transparent resin body 2 and each recess formed on each bottom surface side of the fluorescent light emitting unit 1. It should be noted that this air layer may be formed by the recesses formed on the bottom surface side of the transparent resin body 2 and the top surface side of the transparent resin body 3. Further, the air layers 4a and 4b are not limited to the above-mentioned recesses, as long as they can maintain a predetermined clearance.

Further, an EL plate 6 is arranged on the bottom surface side of the transparent resin body 3. Then, the visible side outer peripheral surfaces of the transparent resin body 2 and the EL plate 6 (the left end surface in FIG. 2 corresponds to the visible side outer peripheral surface).
The outer peripheral surface except for is covered with a transparent resin cover 5.
Two ribs 7a and 7b for attaching to the body are formed on the bottom side of the cover 5, and one of the attaching ribs 7b is a hollow lead passage 8. A lead 9 for connecting to an electrode terminal (not shown) of the EL plate 6 is arranged in the predetermined power supply terminal (not shown).
Connected to. The clearance monitor has a semi-circular semi-cylindrical shape as a whole.

In this fluorescent light-emitting body, mainly the upper surface and the lower surface of the fluorescent light-emitting portion are exposed to sunlight rays or light rays of various electric lamps, and when the EL plate is made to emit light, the light rays emitted from the EL plate are incident. The fluorescent dye contained in the light emitting section 1 absorbs this light ray and emits fluorescence, and most of this fluorescence is totally reflected at the interface between the upper and lower surfaces of this fluorescent light emitting section 1 and is about 60 to 70% of this fluorescence. The fluorescent light is emitted from the outer peripheral surface in a dense state. The light emitted from this outer peripheral surface is visually recognized.

Therefore, in the present clearance monitor, the dense light is emitted from the outer peripheral surface which is the visible surface, so that the driver can easily visually recognize the clearance monitor. Furthermore, since there is an air layer made of air with a low refractive index on the upper and lower surfaces of the fluorescent light emitter 1, total reflection efficiency at the interface is good, and the light emitted from the outer peripheral surface of the fluorescent light emitter 1 becomes more dense. The brightness is also increased.

(Example 2) FIG. 4 shows a vertical cross-sectional view of a fluorescent light-emitting body according to this example. The present fluorescent substance is also applied to the clearance monitor.

The present fluorescent light emitting body (1) uses the LED 61 as a light emitting source, and (2) the installation location of the LED 61 is almost at the center of the bottom side of the transparent resin body 31, and the transparent resin cover 51 has an electrode terminal ( The second embodiment is the same as the first embodiment except that it has a groove 51a for passing the lead 91 connected to (not shown).

The present fluorescent light emitter also has the same effect as that of the first embodiment.

(Example 3) Fig. 5 shows a perspective view of a fluorescent light emitting body of the present example. The fluorescent light emitting portion is formed by integrally laminating three resin plate-like bodies (made of PMMA resin) 1a, 1b and 1c having a trapezoidal cross section in four directions. And, "Violet 570" (BASF
-A purple fluorescent dye having a maximum absorption wavelength of about 376 nm manufactured by Japan Co., Ltd. is uniformly dispersed, and "Yellow 083" (BASF-Japan Co., Ltd.) in the intermediate plate 1b.
Yellow fluorescent dye having a maximum absorption wavelength of about 475 nm) is evenly dispersed, and "Red 300" (manufactured by BASF-Japan Co., maximum absorption wavelength of about 300 nm) is provided on the resin plate 1c in the lowermost layer. (578 nm) red fluorescent dye is uniformly dispersed. And this resin plate-shaped body has a thickness of about 2
mm, and assuming that the area of the outer peripheral surface is 1 as a whole, the sum of the areas of the upper and lower surfaces is about 16. In this case, when the incident light ray of light is on the upper surface side, it is preferable to absorb the photons of short wavelength from the uppermost stage and the photons of long wavelength in the lowermost dye. This is because in this case, all wavelengths of sunlight can be efficiently absorbed.

Since this fluorescent light emitting portion is composed of laminated resin plate-like bodies of three colors of purple, yellow and red, it is excellent in design effect. In addition, since it has inclined surfaces on all sides and light is emitted from this end surface, it is easier to visually recognize.

Like the clearance monitor of Example 1, the fluorescent light emitting unit of this Example has a transparent resin cover and a light emitting source except for the outer peripheral surface portion on the visible side of the fluorescent light emitting unit formed of the three-layer resin plate-shaped body. Etc. are provided and serve as a clearance monitor. Further, an air layer is formed between each of the upper surface of the uppermost resin plate 1a and the lower surface of the lowermost resin plate 1c constituting the fluorescence emitting portion and the inner surface of the transparent resin cover. . Therefore, the fluorescence is totally reflected with the upper and lower surfaces as interfaces. Therefore, the fluorescent dyes have three colors without being mixed.

It should be noted that the present invention is not limited to the one shown in the above embodiment, and various modifications can be applied within the scope of the present invention depending on the purpose and application.

Further, among the outer peripheral surfaces of the fluorescent light emitting portion of the resin plate-shaped body, the outer peripheral surfaces other than the outer peripheral surface on the viewing side may be covered with a light reflecting material such as aluminum foil. In this case, the outer peripheral surface portion on the viewing side becomes the only irradiation portion, and the fluorescence can be further concentrated, so that the luminance of the irradiation portion can be further increased.

In addition to the clearance monitor, the present fluorescent light emitter can be used for emblems, side moldings, bumper moldings, and the like. In particular, when used as a side molding, light is emitted from the end face in the longitudinal direction, so that when the door is opened, the end portion of the door can be easily recognized.

[Effect of the Invention] The fluorescent light emitting portion of the present invention has a plate shape in which the fluorescent light emitting portion contains a fluorescent dye. Moreover, since at least the central portion of the upper surface and the lower surface of this fluorescent light emitting portion is a space, the total reflectance of light on the upper and lower surfaces of the fluorescent light emitting portion is high, and the fluorescence emitted from the outer peripheral surface of the fluorescent light emitting portion is correspondingly high. The amount of light rays increases.
That is, the light emitted from the present fluorescent light-emitting body to the viewing side is dense.

Therefore, the present fluorescent light emitter has good visibility.

[Brief description of drawings]

FIG. 1 is a perspective view of a fluorescent light emitter according to the first embodiment.
FIG. 2 is a vertical sectional view of the fluorescent substance shown in FIG. FIG. 3 is an enlarged cross-sectional view of a main part of the fluorescent light emitting body shown in FIG. FIG. 4 is a vertical cross-sectional view of the fluorescent light emitting body according to the second embodiment. FIG. 5 is a perspective view of the fluorescent light emitter according to the third embodiment. FIG. 6 is an explanatory view showing a conventional clearance monitor. 1 ... Fluorescent light emitting portion containing fluorescent dye 2, 3 ... Transparent resin body, 4 ... Medium 5 ... Transparent resin cover, 6 ... Luminescent source 7 ... Mounting rib, 8 ... Lead passage 9 ... … Lead, 10 …… Concave, 11 …… Clearance monitor α …… Inclination angle

Claims (2)

[Scope of utility model registration request] 1. A transparent resin body laminated on the upper and lower surfaces of the fluorescent light emitting portion with a space between the plate-like fluorescent light emitting portion containing a fluorescent dye and at least the central portions of the upper and lower surfaces of the fluorescent light emitting portion. And a light emitting source provided on the lower surface side of the transparent resin body on the lower side. 2. The fluorescent light emitting body according to claim 1, wherein the outer peripheral surface of the outer peripheral surface of the fluorescent light emitting portion except for the visible side is covered with a light reflecting material.