JPH0414942Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to an indicator lamp that uses multiple light emitting diodes (hereinafter referred to as "LEDs") as a light source, especially when exposed outdoors. In addition to improving waterproofness so that it can be used in a This invention relates to a light emitting diode indicator lamp that can efficiently release heat to the outside.

(Prior Art) Many indicator lights have been proposed in the past that use multiple LEDs and arrange them in a holder to emit light in a variable color or a specific color, and are generally used for display on various display boards. It is known to be used as an element in place of an incandescent light bulb. As shown in FIG. 3, an LED serving as a light source for such an indicator lamp is constructed by embedding a light emitting semiconductor 11 and a reflecting mirror 12 together with an electrode bonding wire 13 in an epoxy resin 14, with a radius R on the light emitting part side. It was made up of a hemispherical convex lens 16 formed integrally or integrally with each other, and had a sharp beam pattern in both vertical and horizontal directions. Therefore, when constructing an indicator light using a plurality of such LEDs, especially when it is necessary to form an appropriate light distribution beam pattern in the horizontal direction, it is necessary to use a light beam pattern as shown in Fig. 4. A diffuser plate, a Fresnel lens, etc. 17 was placed in front of the LED group serving as a light source, and used to obtain a desired light distribution beam pattern.

(Problem to be solved by the invention) Generally, heat generated from an LED is caused by the frame lead 15, which is an electrode, and the convex lens 1, which is made of 14 epoxy resins.
However, if the structure is equipped with a diffuser plate, a Fresnel lens, etc. 17 as shown in FIG.
Since a sealed space 19 is formed between the LED group and the diffuser light plate, Fresnel lens, etc. 17, heat dissipation from the front of the LED is poor, which is a factor that reduces the brightness and life of the LED due to an increase in temperature.

This idea was created to solve the above problem.

(Means for solving the problem) This idea forms a cindrical lens in the light emitting part of the epoxy resin body of the LED, and
Even when an indicator light is constructed using a light source, the desired light distribution can be achieved by appropriately aligning or combining the light distribution beam patterns of each LED that is grouped together as a light source of one indicator light, without using a diffuser plate or Fresnel lens. A method is taken to form a light distribution beam pattern in the vertical and horizontal directions.

(Function) As a result, it is possible to ensure heat dissipation from the front of the LED group constituting the indicator light, and to eliminate thermal effects on the LEDs.

(Example) An embodiment of this invention will be described below.

Figure 1 shows the structure of an LED according to this invention, in which 1 is a light emitting semiconductor, 2 is a reflecting mirror, and 3 is an electrode bonding wire, which is embedded in an epoxy resin 4, and the four epoxy resin bodies are Frame leads 5 are made to protrude from the bottom. A cindrical lens 6 is integrally or integrally formed on the top of the four epoxy resin bodies, that is, on the side of the light emitting part serving as an LED.
When used as an indicator light for a display board installed in a large indoor stadium, for example, the sindrical lens 6 has an expanse of about 20 degrees in the vertical direction, that is, in the up and down direction, and about 100 degrees in the horizontal direction, that is, in the left and right directions. A light distribution beam pattern is required. In order to meet this requirement, it is sufficient to form a cindrical lens 6 that extends only in the horizontal direction on the light emitting portion side of each LED. The size of the so-called semicylindrical lens 6 can be changed as appropriate depending on the required light distribution beam pattern. Further, by arranging and gathering a plurality of LEDs having such a cylindrical lens 6 with their light distribution directions aligned or combined as appropriate, a desired light distribution beam pattern can be obtained in the vertical and horizontal directions as an indicator light.

In addition, in this invention, the gap between the holder 8, which serves as an outer covering structure material for accommodating multiple LEDs, and the frame lead 5 of each LED is designed to increase airtightness within the holder and at the same time to reduce the amount of heat generated by the LEDs when lit. The structure is such that a sealing material 9 with good heat conductivity is injected to efficiently transmit and dissipate heat.

(Effects of the invention) Because this invention is configured as described above, there is no need to attach a diffuser plate or lens to the front of the LED group as in conventional indicator lights, and the heat generated from the LEDs is efficiently transferred to the outside. It is possible to propose a light-emitting diode type indicator lamp with a long life since it can transmit and dissipate light.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a light emitting diode having a sindrical lens which serves as a light source of a light emitting diode indicator lamp according to this invention, and Fig. 2 is a longitudinal cross-section of an indicator lamp using a light emitting diode having a sindrical lens as a light source. FIG. 3 is a front view showing the structure of a conventional light emitting diode, and FIG. 4 is a longitudinal sectional view of an indicator light using a conventional light emitting diode as a light source. 1...Light emitting semiconductor, 2...Reflector, 3...Electrode bonding wire, 4...Epoxy resin, 5...Frame lead, 6...Cindrical lens.

Claims (1)

[Claims for Utility Model Registration] (1) A plurality of light emitting diodes forming a cylindrical lens having a light distribution pattern that is narrow in the vertical direction and wide in the horizontal direction on the light emitting part side, each having a light distribution direction. A light emitting diode indicator light consisting of a set of LED lights arranged or combined in a holder. (2) The light emitting diode type indicator lamp according to claim 1 of the utility model registration claim, characterized in that a sealing material with high electrical insulation and good thermal conductivity is injected and filled between the holder and each light emitting diode. .