JPH0611366U - Light emitting diode - Google Patents

Abstract

(57) [Summary] [Objective] An object of the present invention is to provide a light-emitting diode capable of effectively increasing lateral dispersion of light. [Configuration] A light-diffusing groove 6 is formed on the top of the light-transmitting coating 2.
Since the light diffusion groove 6 causes the function of the prism and the light diffusion groove 6 causes the function of the prism, the light from the light emitting diode 1 is emitted from the light diffusion groove 6.
Thus, the light can be refracted to the side and can be efficiently dispersed in the direction, and the light with high brightness can be radiated to the side.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a light-emitting diode in which a light-emitting body is covered with a light-transmitting coating made of a light-transmitting resin material.

[0002]

[Problems to be solved by the device]

 For example, in a safety light or the like that emits light at night using a light emitting diode, the emitted light is desired to be widely dispersed with no brightness and directivity. In the conventional lighting device of this type, however, the light emitting diode is used as a light source, and the light emitting diode is directly surrounded by a globe serving as an outer casing. As shown in FIG. , A light emitting body y made of a PN junction of a semiconductor material such as GaAs is housed in a shell-shaped light transmitting covering body x made of a light transmitting resin material, and two pin terminals z and z are hung from the lower surface thereof. The resin is formed by the apex of the resin that acts as a lens to converge the light, and tends to emit light upward from the apex, with a weak diffusion of light in the circumferential direction and low brightness. There was a problem that was. For this reason, the light is generally checked from the side like a safety light, and if applied to this, the illuminance is low and the efficiency is poor. It is an object of the present invention to provide a light emitting diode capable of effectively increasing the lateral dispersion of light.

[0003]

[Means for Solving the Problems]

 The present invention is characterized in that a light diffusion groove having a conical shape, a parabolic cross section, or the like is formed on the upper surface of the transparent cover.

[0004]

[Action]

 As shown in FIG. 1, the light from the light emitting diode passes through the light-transmitting cover made of a light-transmitting resin material and collides with the light-dissipating groove, and then is reflected and transmitted to the side or the light-dissipating groove. See through. Therefore, by fitting the light source cap to the light emitting diode, the light emitting groove acts as a prism, and the light from the light emitting body is refracted sideways at the upper part of the light emitting diode, and the light is emitted to the surroundings. The Rukoto. Then, this portion causes the action of a prism to emit light. That is, the light source becomes substantially larger and diffuses laterally without directivity, resulting in high brightness laterally.

[0005]

【Example】

 An embodiment of the present invention will be described with reference to the accompanying drawings. Reference numeral 1 denotes a light emitting diode according to the present invention, in which a light emitting body 4 made of a light transmissive resin material and having a PN junction of a semiconductor material such as GaAs between electrodes 3a and 3b is connected to a light transmissive coating body 2. Then, two pin terminals 5a and 5b connected to the electrodes 3a and 3b are hung from the lower surface of the transparent cover 2. Then, when a voltage is applied between the pin terminals 5a and 5b, the light emitting body 4 emits light.

The light-transmitting coating 2 has a short cylindrical shape, and a conical light-diffusing groove 6 having an apex angle of, for example, 90 ° is formed at its apex. Various proposals have been made for the angle of the light diffusion groove 6 in the range of 30 ° to 120 °, and the cross section may be parabolic in cross section. Further, since the transparent cover 2 is manufactured by pouring a material into a resin mold, various shapes can be arbitrarily formed. Alternatively, the light diffusion groove 6 may be formed by forming the conical or parabolic cross-section at the top end of the conventional shell-shaped transparent cover 2.

The operation of the light emitting diode 1 having such a configuration will be described. The light emitted from the light-emitting body 4 is diffused over the entire circumference, but mainly due to the action of the light diffusion groove 6, the light is directly transmitted to the side as shown by the arrow a in FIG. One can be considered to be radiated upward along the side surface, and one radiated obliquely upward as indicated by arrow c. Then, the thing of the arrow line b collides with the diffusion groove 6, is reflected by the radiation surface 7 inclined at 45 °, is converted into the light to the side as shown by the arrow line d, and is transmitted to the outside. In the case of the arrow c, the cylindrical surface of the light-transmitting coating 2 is obliquely irradiated and reflected, does not pass through the side surface, is confined and refracts for several degrees and collides with the diffusion groove 6. As described above, the trajectory of the arrow d is traced, or the radiation surface 7 is irradiated perpendicularly and is transmitted outward. That is, most of the luminous flux emitted upward is reflected by the emission surface 7 and converted into lateral light. In other words, the diffusion groove 6 acts as a prism and disperses the light particularly laterally.

Thus, the light emitted from the light-emitting body 4 causes light to be emitted with high brightness from the peripheral surface of the cylindrical fitting groove 2 and the peripheral surface of the light-radiating groove 6 of the translucent cover 2.

The light emitting diode 1 having such a structure is used, for example, in a safety light that blinks at night. The structure will be described with reference to FIG. 2. The circuit board 12 is supported by a conductive screwing plate 11 screwed to the dry battery 10 with a required electrical connection, and the light emitting diode 1 is pinned from the circuit board 12. It is levitated and supported by 5a and 5b. The light emitting diode 1 is controlled by a circuit member on the circuit board 12 so as to blink only at night. A protective frame body 14 is fitted on the screwed plate 11, and the light emitting diode 1 is led out from a cylindrical hole 15 formed in the upper surface of the protective frame body 14. Further, the translucent covering body 2 of the light emitting diode 1 may be fitted in and fixed to the cylindrical hole 15. A safety light is formed by surrounding the light emitting diode 1 with the globe 20.

In the above embodiment, the light diffusion groove 6 has a conical shape. However, in addition to a truncated cone shape, a pyramid having a conical surface inclined in the circumferential direction from the center, or a parabolic cross section. The light emitting groove 6 may be in the shape of a circular arc, and various forms of the light diffusion groove 6 can be proposed. Further, although the apex angle is 90 ° in this embodiment, the ratio of the light emitted laterally and the light emitted upward can be appropriately changed by changing this angle. Further, by making the arc shape as described above, the light can be evenly diffused from the side to the top. In any case, the light diffusion groove 6 radiates the light of the light emitting diode to the apex, but it can be refracted to enhance the lateral light.

[0011]

[Effect of device]

 According to the present invention, the light diffusion groove 6 is formed on the top of the light-transmitting cover 2 as described above, and the function of the prism is generated by the light diffusion groove 6, so that the light from the light emitting diode 1 is diffused. It can be refracted laterally by the groove 6 and can be efficiently dispersed in that direction, and it becomes possible to radiate light with a high degree of explicitness due to the lateral light brightness, such as safety lights and pilot lamps. It has an excellent effect that it is most suitable for those requiring high-intensity lateral light.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a light emitting diode 1.

FIG. 2 is a vertical sectional side view in which the light emitting diode 1 is applied to a safety light.

FIG. 3 is a vertical sectional side view of a light emitting diode D having a conventional configuration.

[Explanation of symbols]

 1 Light-emitting diode 2 Light-transmitting coating body 4 Light-emitting body 6 Light-emission groove 7 Light source

Claims (1)

[Scope of utility model registration request] 1. A light-transmitting coating body made of a light-transmitting resin material containing a light-emitting body, wherein a light-diffusing groove having a conical shape, a parabolic cross-section, or the like is formed on the top of the light-transmitting coating body. Characteristic light emitting diode.