JPH0258089A - Light emission body with diffusion part and its manufacture - Google Patents

Abstract

PURPOSE:To manufacture the light emission body which has the diffusion part with a beautiful light emission surface by forming an injection hole for a dispersant and an air vent in a reflecting surface of an outer shell body and setting reflecting surface not in parallel with each other. CONSTITUTION:A tape is stuck on the opening surface of the outer shell body 2 which serves as the light emission surface. The outer shell body 2 is held slantingly with the reflecting surface 2a where the injection hole and air vent 7 are formed up so that the air vent 7 is higher than the injection hole 8 and the opening side of the inside reflecting surface 2b is high; and the dispersant 3a is injected into the injection hole 8 as shown by an arrow 4. The injection is stopped when the dispersant 3a is charged up to the air vent 7 and this state is held until the injected dispersant 3a cakes. Consequently, neither an air bubble nor air bubble trace in the dispersant remains on the light emission surface at the time of the manufacture and the beautiful light emission surface is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a light emitter with a diffusion section and a method for manufacturing the same.

(Prior Art) In recent years, inexpensive light-emitting bodies having a light-emitting surface larger than that of a single light-emitting diode are often required for various electronic devices including audio equipment such as stereos and karaoke. Generally, a diffusion tape is attached to the front surface of an outer body provided with a reflective surface to which one light emitting diode is attached, or a diffusion section made of a diffusion agent is provided.

Regarding the conventional light emitting body with a diffuser and its manufacturing method,
This will be explained with reference to FIGS. 4 to 7.

4 and 5 are a side sectional view and a perspective sectional view of a conventional light emitting body with a diffuser. It is composed of an outer shell 2 on which a surface 2a is formed, and a diffusion section 3 made of a diffusing agent and filling the above-mentioned square pyramid.

The operation of the light emitting body with a diffuser configured as described above will be explained. The light from the light emitting diode 1 is transmitted directly or through the reflective surface 2a.
When the light is reflected and illuminates the top surface of the diffuser, the entire top surface becomes evenly bright.

Next, a method of manufacturing a light emitter with a diffusion section configured as described above will be described.

First, insert the light emitting diode 1 from the bottom of the outer body 2 and fix it.Next, with the opening of the outer body 2 facing upward, diffuse the diffusing agent 3a, such as epoxy resin containing a diffusing agent, as shown by the arrow 4. Inject into part 3.

(Problem to be solved by the invention) However, in the above-described configuration and manufacturing method, the sixth
As shown in the perspective cross-sectional view of the figure, air bubbles 5 are present in the diffusing agent 3a.
There was a problem that bubbles remained or floated to the surface before hardening, resulting in crater-shaped bubble marks 6. The bubble trace 6 on the light-emitting surface becomes annularly bright in some parts when the light-emitting diode 1 emits light, and there is a problem in that a negative-like light-emitting surface cannot be obtained.

The present invention solves the above-mentioned problems and provides a light emitting body with a diffusion portion that does not generate bubble marks and a method for manufacturing the same.

(Means for Solving the Problems) In order to solve the above-mentioned sWl, the present invention provides a diffusing agent injection port and an air vent hole on the reflective surface of the outer shell so that bubbles of the diffusing agent gather in the air vent hole. Secondly, the angles of the reflective surfaces are set so that they are not parallel to each other.

In addition, in manufacturing the light emitter with a diffusion section, tape or the like is pasted on the opening surface of the outer shell to prevent the injected diffusion agent from leaking, and the reflective surface with the injection port and air vent hole is The outer shell is placed obliquely and a diffusing agent is injected so that the inner reflective surface of the adjacent light emitting diode is higher on the opening side.

(Function) With the above configuration, the air bubbles in the diffusing agent float, collect in the air vent hole, and escape, so that no air bubble traces are generated on the light emitting surface.

(Embodiment) An embodiment of the present invention will be described with reference to FIGS. 1 to 3.

1 and 2 are a side sectional view and a plan view of a light emitter with a diffuser according to the present invention.

The embodiment according to the present invention shown in both figures differs from the conventional example shown in Fig. 4 in that an air vent hole 7 and an inlet 8 are provided in the corners of the outer reflective surface 2a in order from the back. The intersection line 9 between this reflective surface 2a and the reflective surface 2b inside the adjacent quadrangular pyramid is on the opening side of the outer shell 2.

Since the rest is the same as the conventional example, the same components are given the same reference numerals and their explanations will be omitted.

Further, since the operation of the light emitting body with a diffuser configured in this manner is the same as that of the conventional example shown in FIG. 4, the explanation thereof will be omitted.

A method of manufacturing the light emitting body with a diffusion section configured as above will be explained.

First, as shown in FIG. 3, a tape is attached to the opening surface of the outer shell 2, which becomes the light emitting surface. Next, the reflective surface 2a provided with the inlet 8 and the air vent hole 7 is placed upward, and is tilted so that the air vent hole 7 is higher than the inlet 8 and the opening side of the inner reflective surface 2b is higher. While holding the outer shell 2, the diffusing agent 3a is injected from the injection port 8 as shown by the arrow 4. As shown in FIG. 3, the injection is stopped when the diffusing agent 3a is filled and reaches the air vent hole 7, and the injected diffusing agent 3 is
Hold it in that state until it solidifies. After curing, tape 10 is removed.

(Effects of the Invention) As explained in 1-1, according to the present invention, during manufacturing,
Bubbles in the diffusing agent and bubble traces do not remain on the light emitting surface, a beautiful light emitting surface is obtained, and defects caused by bubble traces are also eliminated. In addition, by applying knurling or other processing to the surface of the tape that is attached to the opening surface of the outer shell, it is possible to emit light.
It becomes possible to change the diffusion effect.

[Brief explanation of the drawing]

1 and 2 are a side sectional view and a plan view of a light emitter with a diffuser according to the present invention, FIG. 3 is a side sectional view showing a manufacturing method thereof, and FIGS. 4, 5, and 6 are conventional FIG. 7 is a side sectional view and a perspective sectional view of a light emitter with a diffusion section, and FIG. 7 is a side sectional view showing a conventional method of manufacturing a light emitter with a diffusion section. DESCRIPTION OF SYMBOLS 1... Light emitting diode, 2... Outer body, 2a, 2
b...Reflecting surface, 3...Diffusion part, 3a...Diffusing agent, 5...Bubble, 6...Bubble trace, 7...Air vent hole, 8...Inlet, 9...・Intersection line, IO・
··tape. Patent applicant: Matsushita Electric Industrial Co., Ltd.

Claims (2)

[Claims] (1) In a light-emitting body with a diffusion part, which is composed of a plurality of light-emitting elements, an outer shell having an inclined reflective surface surrounding the light-emitting elements, and a diffusion part formed on the front surface of the light-emitting elements, the outermost The structure is such that the intersection line between the reflective surface and the inner reflective surface in the same direction is on the front surface of the light emitter, and the outermost reflective surface is provided with a diffusing agent injection port and an air vent hole that form a diffusing section. A light-emitting body with a diffusion section. (2) Place the outer shell with tape pasted on the opening surface of the outer shell, with the outermost reflective surface where the injection port and air vent hole are formed facing upward and facing inward, and the inner reflective surface in the same direction facing outward. A method for manufacturing a light emitting body with a diffusion section, in which the tape is placed at an angle, a diffusion agent is injected through an injection port, and after curing, the above-mentioned tape is peeled off.