JP2001332765A - LED indicator light - Google Patents

Abstract

(57) [Summary] [Problem] A stable lighting without flicker can be obtained.
It is another object of the present invention to provide an LED display lamp that can effectively use emitted light and has good visibility. SOLUTION: A reflection type light emitting diode 15 mounted on a circuit board 14 is accommodated in a hollow portion of a cylindrical body 13, and at least two or more light emitting elements 16 are mounted on the reflection type light emitting diode and an interval between the light emitting elements 16 is provided. The electrical connection within the reflective light-emitting diode of the light-emitting element is half of the number mounted, the anode and the cathode are connected in reverse, and the light is turned on every half-wave in AC lighting, and light emission is not interrupted. It is configured to light up.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an improvement of an LED indicator light.

[0002]

2. Description of the Related Art Conventionally, as an LED indicator used for a measuring instrument, a disaster prevention device, etc., for example, as shown in FIG.
A plurality of resin lens type light emitting diode units 3 are mounted in the middle part of the above, a blanket cover 4 also serving as a protection of the light emitting part is arranged and supported on the upper end face of the base, and is filled and solidified with resin. .

As shown in FIG. 7, an electrical connection of the light emitting diode unit 3 is made by mounting a light emitting diode 5 having a multiple of two on the upper surface of a circuit board, and the light emitting diode also functions as a rectifying element. By arranging half-wave lighting alternately in half of the number of mounted units, it is possible to secure a lighting state such that the lighting can be performed collectively visually, and the lighting can be performed by low-voltage AC lighting without using a rectifier circuit. According to the structure shown in FIG. 7, without providing a rectifier circuit such as a bridge circuit,
Flicker is reduced.

[0004]

However, as shown in FIG.
According to LED indicator shown in, the light emitted from the light emitting element in order to use the commercial power supply, 50H _Z or 60
For a half-wave lighting state at H _Z, there is a disadvantage that flicker occurs depending particularly 50H _Z lighting conditions and the power supply voltage fluctuations in the case of lighting. In addition, even when a large number of light-emitting diodes are integrated and turned on, the light from each light-emitting diode does not mix completely, so this phenomenon can be reduced, but it must be completely eliminated. Is impossible.

[0005] The present invention has been made in view of the above points, and it is possible to obtain a stable lighting without flickering, to effectively use emitted light, and to further improve visibility.
An object of the present invention is to provide an ED indicator.

[0006]

Means for Solving the Problems The present invention has the following structure to solve the above-mentioned problems. According to the first aspect of the present invention, a reflective light emitting diode mounted on a circuit board is housed in a hollow portion of a cylindrical body having a base at least at one end, and the reflective light emitting diode has at least two light emitting elements. , And the distance between the light emitting elements is reduced. Further, the electrical connection in the reflection type light emitting diode of the same light emitting element is such that half of the number of the mounted light emitting diodes are connected in reverse of the anode and the cathode, and in AC lighting, light is emitted every half wave and light is emitted without interruption. It is configured as follows.

According to a second aspect of the present invention, in the LED display lamp according to the first aspect, the plurality of light emitting elements mounted in the reflective light emitting diode are arranged with an interval within twice the outer diameter. It is configured.

According to a third aspect of the present invention, in the LED display lamp according to the first and second aspects, the refractive index of the light-transmitting resin in which the reflective light emitting diode is sealed inside the cylindrical body is: The same or similar to the refractive index of the light-transmitting resin used in the package of the reflective light-emitting diode,
The light-transmitting resin sealing the reflection type light emitting diode is
It is configured using a material containing diffusible fine particles.

According to the first and second aspects of the present invention, stable lighting without flicker can be obtained.

According to the third aspect of the present invention, the refractive index of the light-transmitting resin is the same as or similar to the refractive index of the light-transmitting resin used in the package of the reflective light emitting diode. The light emitted from the light emitting diode has a small light loss due to refraction, the emitted light can be used effectively, and the light transmitting resin sealing the reflective light emitting diode contains diffusing fine particles. Since it is configured, it has characteristics of good visibility when viewed from all angles.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to FIGS. In FIG. 1, reference numeral 11 denotes a hollow base having a bottom.
Reference numeral 12 denotes a contact provided on the bottom of the base 11. Reference numeral 13 denotes a hollow cylindrical body fitted and supported on the upper end of the base 11, and is made of resin. The base 11 and the cylindrical body 13 are fixed by an adhesive. Reference numeral 14 denotes a circuit board housed inside the cylindrical body 13, and reference numeral 15 denotes a reflection type light emitting diode supported on the circuit board 14;
Or a plurality of supporting members. Reference numeral 16 denotes a light-emitting element supported by the reflective light-emitting diode 15, and at least two or more light-emitting elements are incorporated therein. In addition, the distance between the light emitting elements is configured to be narrow, so that it is possible to visually recognize that a single light emitting element is lit. Further, the plurality of light emitting elements mounted in the reflection type light emitting diode are arranged so as to have an interval within twice the outer diameter. As shown in FIG. 4, when the outer diameter of each element is 0.3 mm, the interval between each element is, for example, 0.6 mm. Further, as shown in FIG. 5, the electrical connection in the reflective light emitting diode of the same light emitting element is such that the anode and the cathode are connected in half of the number mounted, and in AC lighting, light is emitted every half wave, Is configured to light without interruption.
Since it can be lit without interruption of light emission,
A light-emitting state without flicker can be maintained.

The refractive index of the light-transmitting resin 17 formed by sealing the reflective light emitting diode inside the cylindrical body shown in FIG.
The light-transmitting resin 18 used in the package of the reflective light-emitting diode is configured to have the same or similar refractive index as the light-transmitting resin 18. When the refractive indices of the two light-transmitting resins are the same or close to each other, light emitted from the reflective light emitting diode has a small light loss due to refraction, and the emitted light can be used effectively. The light-transmitting resin sealing the reflective light-emitting diode and the light-transmitting resin used for the package of the reflective light-emitting diode are made of, for example, any one of epoxy resin, acrylic, and silicon. It is. The light-transmitting resin 17 in which the reflective light-emitting diode is fixed inside the cylindrical body contains diffusing fine particles. As the diffusible fine particles, for example, silica is used. When it is configured to include the diffusing fine particles, there is a characteristic that visibility is good when viewed from all angles.

Reference numerals 20 and 21 denote connecting wires,
And a circuit board 14 having a reflective light emitting diode 15. A fixed resistor 22 is connected between the base and the circuit board 14.

The above LED indicator can be easily assembled in the following order. The circuit board 14 supports connection wires formed by connecting the reflective light-emitting diode 15, the connection wires 20, 21 and the fixed resistor 22, and then supports the circuit board 14 on the middle step of the cylindrical body 13. I do. After this, the cylindrical body 13 is fitted and supported on the base 11, each connection wire is connected to a predetermined location, and the reflective light emitting diode 15 is sealed to the cylindrical body 13 with the light-transmitting resin 17 to easily assemble. it can.

[0015]

According to the first and second aspects of the present invention, as described above, there is a special effect that stable lighting without flicker can be maintained.

According to the third aspect of the present invention, as described above, the refractive index of the light-transmitting resin is close to the refractive index of the light-transmitting resin used in the package of the reflection type light emitting diode. The light emitted from the reflective light emitting diode has a small light loss due to refraction, the emitted light can be effectively used, and the light transmitting resin formed by fixing the reflective light emitting diode contains diffusing fine particles. Due to the configuration, there is a special effect that visibility is good when viewed from all angles.

[Brief description of the drawings]

FIG. 1 is a sectional view of an LED indicator light according to the present invention.

FIG. 2 is a sectional view of a reflective light emitting diode according to the present invention.

FIG. 3 is a front view of a reflective light emitting diode according to the present invention.

FIG. 4 is a plan view showing an interval between a plurality of light emitting elements according to the present invention.

FIG. 5 is a schematic circuit diagram of an LED indicator lamp according to the present invention.

FIG. 6 is a cross-sectional view of a conventional LED indicator light.

FIG. 7 is a schematic circuit diagram of a conventional LED indicator light.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Base 12 Contact 13 Cylindrical body 14 Circuit board 15 Reflection type light emitting diode 16 Light emitting element 17 Light transmissive resin 18 Light transmissive resin 20, 21 Connection electric wire 22 Fixed resistance

Continuing on the front page (72) Inventor Minoru Matsushima 4-7-3 Kudanminami, Chiyoda-ku, Tokyo Nomi Disaster Prevention Co., Ltd. (72) Inventor Norio Suzuki 4-73-3, Kudanminami, Chiyoda-ku, Tokyo Nomi F-term (for reference) 5F041 AA06 AA09 BB34 DA13 DA16 DA42 DA57 EE23 FF11

Claims (3)

[Claims] 1. A reflection type light emitting diode mounted on a circuit board is housed in a hollow portion of a cylindrical body having a base at least at one end, and at least two or more light emitting elements are mounted on the reflection type light emitting diode. The distance between the light-emitting elements is reduced, and the electrical connection of the light-emitting elements within the reflective light-emitting diode is half of the number mounted, with the anode and cathode connected in reverse. And an LED indicator lamp configured to be lit without interruption of light emission. 2. The LED display lamp according to claim 1, wherein the plurality of light emitting elements mounted in the reflection type light emitting diode are arranged with an interval within twice the outer diameter. 3. The refractive index of a light-transmitting resin in which a reflective light-emitting diode is sealed inside a cylindrical body is equal to or the same as the refractive index of the light-transmittable resin used in the package of the reflective light-emitting diode. 3. The LED display lamp according to claim 1, wherein the light-transmitting resin which is close to the light-emitting diode and seals the reflection type light-emitting diode contains diffusing fine particles.