JPH0416460Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Technical field to which the idea belongs]

The present invention includes a light-emitting section that includes an LED element and a reflector that are conductively bonded onto a conductor and connected in series with each other, and a rectifier bridge circuit is connected to the light-emitting section, and a resistor that is connected in series to the light-emitting section. This invention relates to an LED lamp that is internal and has a base.

[Prior art and its problems]

Conventional LED lamps described in Japanese Utility Model Application Publication No. 55-105968, Japanese Utility Model Application Publication No. 57-47052, etc. are insert-molded on a base 34 forming a reflector, as illustrated in FIGS. 8 and 9. Typically, eight LED elements 31 are bonded using a conductive adhesive onto the conductor formed on the lead frame 37, and after cutting off unnecessary parts from the lead frame 37, the LED elements 31 are connected in series with each other using gold wires 33. The connected upper rectifying bridge circuit 36 is connected, and a transparent synthetic resin 35 is injected and coated to fix the resistor 42.
is attached to the holder 39 containing the conductor, and one lead wire 37a formed integrally with the conductor is attached to the holder 39.
The other lead wire 37b is connected to one end of the resistor 42 built into the holder 39, and the other lead wire 37b is connected to one end of the resistor 42 built into the holder 39. The other end is passed through the inside of a tube 43 attached to a cap 41 via an insulator 40, and soldered 44 to the tube 43 on the outside. It is known that an internal electric circuit is formed. this kind of
LED lamps generally have a rated voltage of 24V, with direct current
For a power source of 110V, the resistance value of the resistor 42 is set to 1kΩ and the capacity is 20W, and the current allowed to the LED element 31 is set to 10 to 20mA. On the other hand, conventional displays with resistors that use incandescent light bulbs as light sources use an incandescent light bulb 46 with a rated voltage of 18 V and a rated current of 110 mA for a DC 110 V power source, as shown in Figure 10, in order to extend the life of the light bulb. Generally used is one in which a resistor 47 with a resistance value of 1 kΩ and a capacity of 20 W is connected in series to the light bulb so that the voltage applied to the light bulb is about 14.5 V and the current is about 96 mA. Therefore, when replacing the incandescent light bulb 46 shown in FIG. 10 with the LED lamp shown in FIGS. 8 and 9 for the purpose of saving energy and reducing the labor required for maintenance, the allowable current of the LED element 31 is As mentioned above, it is usually 10 to 20mA, so the first
When an LED lamp with a rated voltage of 24V is used in place of the incandescent bulb 46 as shown in Figure 1, the resistance value of the resistor 47 connected in series with the LED lamp is 1 kΩ for a DC voltage of 110V.
At the rated current of the LED lamp, the shared voltage is significantly lower (initially 10 to 20V), and as a result, the voltage applied to the LED lamp increases accordingly.
As a result of the higher voltage applied to the LED lamp, the LED
A current much larger than the allowable current flows through the element 31, and the LED element itself is destroyed. In this case, in order to prevent the above-mentioned disadvantages, the number of LED elements 31 connected in series is increased and the resistance value of the series resistor 42 built into the LED lamp is increased so that the rated voltage is higher than 24V.
Even if you try to configure an LED lamp, the conventional LED
In a lamp, there is a limit to the space that can accommodate the LED element 31 and the series resistor 42, and even if the series resistor 42 with the required increased resistance value could be housed in the holder 39. , the power consumption in the resistor 42 increases and the temperature inside the LED lamp increases significantly;
The disadvantage is that it is not practical because the lifespan of the LED element itself is shortened. Therefore, an incandescent bulb 46 is used as a light source for the display with the existing resistor 47.
To replace the resistor 47 with a conventional LED lamp, it is necessary to replace the resistor 47 attached to the display with one with a higher resistance value, or to add another resistor to achieve the required resistance value. It is inevitable that it will be complicated and inconvenient. Moreover, if the existing globe covering the front of the light emitting side of the incandescent light bulb 46 of the display device is used as is, the wavelength of its color will not match the wavelength of the emitted light color of the LED element.
In addition, if the glove has a deep color, there is also the problem that the required brightness cannot be obtained.

[Purpose of invention]

When using an incandescent light bulb as a light source, the power supply voltage is
In view of the above-mentioned drawbacks associated with using a conventional LED lamp as a replacement for the incandescent bulb in the existing 110V resistor-equipped indicator, the present invention provides an easy way to replace the existing incandescent bulb in the indicator. The purpose is to provide an LED lamp that can be used as a light source.

[Key points of the idea]

In order to achieve the above purpose, the present invention has the above-mentioned features.
In an LED lamp, a plurality of LED units are formed by fixing a plurality of LED elements conductively bonded to a conductor formed on a lead frame and connected in series in a space consisting of a stem and a reflector. , a base placed on the surface thereof and connected to the rectifier bridge circuit to form an internal electric circuit is housed in the heat dissipation ring;
A glove that matches the emission color of the LED element is fixed to the ring using an appropriate casting material to fix it to the holder, and one terminal of the internal electric circuit is connected to the base via a lead wire drawn out through the holder. At the same time, by connecting the other terminal to another electrode insulated from the base through the series resistor, a large number of
By connecting LED elements in series to reduce the voltage shared by the series resistor and delaying the life of the LED elements by reducing power consumption, and by providing the globe, the rated voltage that satisfies the required brightness can be adjusted. This makes it possible to create high quality LED lamps.

[Example of idea]

Next, the present invention will be explained in detail based on the embodiments shown in the drawings. In the LED lamp according to the present invention as illustrated in FIG. 1, first, as illustrated in FIGS. 3 and 4, six LED element supporting conductors 5c to 5h and two lead wires 5a of a lead frame 4 are connected. and one lead wire 5b of 5b.
The cathode side of each LED element 1 is bonded with conductive paste 7, and when separated from the lead frame 4, each LED element 1 is connected to the lead wires 5a and 5b.
are connected to each other by gold wires 6 so as to be connected in series between them. Furthermore, a reflector 9 having eight cut grooves 9a at equal intervals on its outer periphery supports a lead frame 4 provided with two lead wires 5a and 5b and six conductors 5c to 5h, and Similarly, the stem 10, which has eight protrusions 10b formed at equal intervals on its outer periphery, is attached so that the protrusions fit into each groove 9a of the reflector 9, thereby coupling the stem 10 and the reflector 9. . In order to protect the LED element 1 and the gold wire 6 that connects the LED elements to each other, a transparent casting resin 8 is injected into the space formed by the reflector 9 and the stem 10 and hardened and fixed. After cutting out unnecessary parts, it is as shown in Fig. 4.
Configure LED unit 2. It is constructed as described above, and each has seven
Three LED units 2 equipped with LED elements 1 are arranged on a base 3 as illustrated in FIG.
LEDs are installed in each of the three guide holes 3a formed in the
The guide protrusion 10a formed at the lower end of the stem 10 of the unit 2 is inserted, and two through holes 3 are formed in the base 3 for each LED unit 2.
Lead wires 5a and 5b of each LED unit 2 to c.
The rectifier bridge circuit 13 and base 1
5 and a series resistor 12 to which one terminal 12a is similarly soldered.
At the same time, an internal electric circuit as illustrated in FIG. 2 is formed inside the LED lamp via printed circuit conductors 3b provided on both the front and back surfaces of the base 3. The base 3 having the above-mentioned structure is further housed in a metal heat dissipation ring 19 as illustrated in FIG. The ring 19 is then bonded to the ring 19, and the ring 19 is coupled to the holder 20 to which the base 15 is fixed. At this time, the lead wire 11 is drawn out through the hole 20a of the holder 20 and connected to the base 15, while the other terminal 12b of the terminal 12a soldered to the base 3 of the resistor 12 is connected to the base 15 through the insulator 14. Soldering is carried out through the inside of the pipe 16 to be attached to the outside thereof. In the LED lamp according to the present invention constructed as described above and illustrated in FIG. 1, a total of 21 LED elements 1 are connected in series, so the voltage drop in the forward direction is
Assuming 2V per LED element 1, it reaches 42V,
If the LED lamp is used in an existing display with a 100V DC power supply, it is sufficient to bear 58V by the built-in series resistor 12 of the LED lamp and the attached resistor of the existing display.
It is possible to reduce power consumption in the series resistor 12 and suppress its heat generation, thereby preventing adverse thermal effects on the LED element 1. Therefore, there is no problem in replacing the light source of the existing display with a resistor from an incandescent bulb to an LED lamp. At this time, by applying a glove that matches the emission color of the LED element 1, the required brightness can be ensured.

[Effect of the idea]

As explained above, the present invention includes a light-emitting section that includes an LED element and a reflector that are conductively bonded to a conductor and connected in series with each other, and a rectifier bridge circuit that is connected to the light-emitting section. In an LED lamp that includes a built-in resistor to be connected and a base, a plurality of the LED elements conductively bonded and connected in series on the conductor formed on the lead frame are connected to the stem and the reflector. A plurality of LED units are fixed in a space formed by and fix it to the holder by fixing it to the ring with a suitable casting material along with a glove that matches the luminescent color of the LED element, and one terminal of the internal electric circuit is connected via a lead wire drawn out through the holder. By connecting a large number of LED elements in series, the LED elements are connected to the cap and the other terminal is connected to another electrode insulated from the cap via the series resistor. It is possible to extend the life of the LED element by lowering the shared voltage of the built-in series resistor and reducing its power consumption, and by applying a glove that matches the emission color of the LED element, the required brightness can be ensured. Therefore, the LED lamp can be advantageously used as a substitute for an incandescent light bulb in an existing display with a resistor.

[Brief explanation of the drawing]

Fig. 1 is a schematic vertical cross-sectional view of an LED lamp related to the present invention, Fig. 2 is a schematic wiring diagram of the internal electric circuit of the LED lamp, and Fig. 3 is a schematic plan view of the LED unit of the light emitting part of the LED lamp. Figure 4
The figure shows a schematic vertical cross-sectional view in the AA direction of Fig. 3, Fig. 5 shows an internal wiring diagram of the LED unit, Fig. 6 shows a schematic plan view of the light emitting part of the LED lamp, and Fig.
The figure shows a schematic longitudinal sectional view in the BB direction of Fig. 6, Fig. 8 shows a schematic longitudinal sectional view of a conventional LED lamp, Fig. 9 shows a schematic wiring diagram of the internal electric circuit of the LED lamp, and Fig. 10 shows a schematic longitudinal sectional view of the conventional LED lamp. 11 is a schematic wiring diagram showing a display circuit using a conventional incandescent lamp, and FIG. 11 is a schematic wiring diagram showing a circuit when the incandescent lamp shown in FIG. 10 is replaced with the LED lamp shown in FIG. 8. 1...LED element, 2...LED unit, 3...
...Base, 4...Lead frame, 5a, 5b...
Lead wire, 5c, 5d, 5e, 5g, 5f, 5h
... Conductor, 6 ... Gold wire, 7 ... Conductive paste, 8
... Casting resin, 9 ... Reflector, 10 ... Stem,
11... Lead wire, 12... Resistor, 13... Rectifier bridge circuit, 14... Insulator, 15... Base, 16... Tube, 17... Glove, 18
... Casting material, 19 ... Heat dissipation ring, 20 ... Holder.

Claims (1)

[Scope of utility model registration request] It has a light-emitting part that includes an LED element and a reflector that are conductively bonded to a conductor and are connected in series with each other, and a rectifier bridge circuit is connected to the light-emitting part, and a resistor that is connected in series to the light-emitting part. Prepare your account
In an LED lamp, a plurality of LED units are formed by fixing a plurality of LED elements conductively bonded to the conductor formed on a lead frame and connected in series in a space consisting of a stem and a reflector. is placed on the surface of the base and an internal electric circuit connected to the rectifying bridge circuit is formed, and the base is housed in a heat dissipation ring,
A glove that matches the luminescent color of the LED element and a suitable molding material are used to secure the ring to the holder, and connect one terminal of the internal electric circuit to the base via a lead wire drawn out through the holder. and the other terminal is connected to another electrode insulated from the base via the series resistor.
LED lamp.