JPH0918057A - Chip-arrangement structure for light-emitting diode - Google Patents

Abstract

PURPOSE: To increase the luminous performance of a light-emitting diode provided with a plurality of built-in chips. CONSTITUTION: In a light-emitting diode 1 of a constitution, wherein a plurality of square chips 3 and 3 which emit through each surface thereof by current conduction are mounted onto a base plate 2 and lights a which are emitted from these chips 3 are condensed in front reflecting by the reflective plate 8, and emitted, the chips are provided so that the side surfaces 3a of the plurality of pieces of the chips 3 are turned in a direction to intersect each other. Either of the lights (a), which are emitted from the four side surfaces 3a of each chip 3, does not be affected by its neighboring chip 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting diode chip arrangement structure used in a microphone for karaoke.

[0002]

2. Description of the Related Art A conventional light emitting diode will be described with reference to FIG. Reference numeral 1 denotes a light emitting diode, which is provided with two chips 3 and 3 on a base plate 2 so that their adjacent side surfaces 3a and 3a face each other. This tip 3,3
Is a PN junction of an intermetallic compound semiconductor such as gallium phosphide or gallium-aluminum phosphide. Two of them are arranged on the base plate 2 in order to obtain a light amount larger than one. These chips 3 and 3 have electrodes on the upper and lower surfaces,
The electrodes on the upper surface are connected by leads 6 to pins 5 which are erected from the base plate 2 via an insulating material 4. On the other hand, the lower electrode is directly connected to the base plate 2. Reference numeral 7 is an electrode pin of the base plate 2. Reference numeral 8 denotes a reflector, which collects the light emitted from the two chips 3 and 3 to the front and emits the light. The finished product of the light emitting diode is one in which the upper portion of the reflection plate 8 is covered with a dome-shaped resin material.

[0003]

The chips 3 and 3 emit light from the entire top surface and four side surfaces, including the bottom surface closely attached to the base plate 2, for a total of six surfaces. This emitted light is emitted to the outside in the same direction (upward in the figure) by the reflector 8. By the way, since the two chips 3 and 3 are arranged so that the adjacent side surfaces 3a and 3a face each other as described above, as shown in FIG.
There is a problem that the light rays a and a emitted from a and 3a impinge on the same surface of the other side and interfere with each other, so that they cannot be effectively extracted to the outside.

When two chips 3 and 3 are used (two or more can be used, of course), one surface that is in close contact with the base plate 2 is sacrificed, but the remaining five surfaces, 10 of the two, are efficient. Good light emission is desired. However, in reality, two more of them lose their efficiency as described above. The present invention has been made in view of this point, and by changing the directions of the chips 3 and 3, it is possible to raise the surface, which has conventionally been poor in light emission efficiency, to the same efficiency as other surfaces. Is. Therefore, the overall luminous efficiency is increased.

[0005]

As a means for solving the above-mentioned problems, the present invention mounts a plurality of rectangular chips, which emit light from each surface upon energization, on a base plate, and reflects the light emitted by these chips. In the light emitting diode which collects and emits light in the forward direction, the side surfaces of the plurality of chips are arranged so as to face each other.

[0006]

With such a structure, the light rays emitted from any of the four side surfaces do not strike other adjacent chips, and all rays travel in the radial direction under the same conditions.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will now be described with reference to FIGS. 1 and 2 by the same reference numerals as those in FIG. Base plate 2
When it is attached to, the side surfaces 3a, 3a are directed so as to intersect with each other, in other words, the two chips 3, 3 are attached.
Are arranged so that their corners are close to each other. As a result, the rays a, a intersect, but the side surface 3 of the chips 3, 3
The a and 3a do not hinder the progress of the light rays a and a. Therefore, light rays emitted from each of the five surfaces except the lower surface, that is, ten surfaces are refracted by the reflecting plate 8 and are emitted forward.

[0008]

As described above, the present invention has the structure of arranging the chips of the light emitting diode configured as described above. Therefore, it is possible to obtain a high luminous efficiency in the prior art by a simple structure in which the direction of the chip is changed with respect to the base plate. From the side that did not exist,
It is possible to effectively extract the light rays to the outside. Therefore, it is possible to increase the overall luminous efficiency by using the same chip.

[Brief description of the drawings]

FIG. 1 is a perspective view of one embodiment of the present invention.

FIG. 2 is a plan view of an essential part of FIG. 1 for explaining the flow of light rays.

FIG. 3 is a perspective view showing a conventional light emitting diode at an angle similar to FIG.

FIG. 4 is a plan view of an essential part of FIG. 3 for explaining the flow of light rays.

[Explanation of symbols]

 1 Light emitting diode 2 Base plate 3 Chip 3a Side surface 8 Reflector a Ray

Claims (1)

[Claims] 1. A light-emitting diode in which a plurality of rectangular chips, each of which emits light from each surface when energized, are attached to a base plate, and the light emitted from these chips is condensed forward by a reflecting plate to emit light, wherein the plurality of chips are provided. The chip arrangement structure of the light emitting diode, wherein the side surfaces of the light emitting diode are arranged so as to face each other.