JPS5826079B2 - signal light device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an urban traffic signal light device using a light emitting diode as a light source.

Generally, urban traffic signal lights are composed of an incandescent light bulb placed inside a reflector and a colored lens placed in front of the reflector, and a plurality of these lamps are arranged in a housing with appropriate positional relationships.

However, incandescent light bulbs, which serve as light sources, are used under harsh conditions, such as being repeatedly turned on and off day and night, and subject to significant environmental changes such as temperature and climate. Disconnections are likely to occur, so maintenance and management must be adequate, and the costs involved are enormous.

In addition, because they are incandescent bulbs, they require colored lenses as filters, which makes them inefficient, but to compensate for this, it is necessary to use a high-output light source, which consumes a lot of power. The temperature inside the body will rise significantly, and the structure will become complicated, as it will be necessary to withstand the above-mentioned environmental changes and also take into account fluctuations in the internal temperature.

To deal with this situation, traffic signal lights using light-emitting diodes as light sources have been proposed, and because of the semi-permanent lifespan of light-emitting diodes, maintenance and
The effort required for management, etc. can be significantly reduced compared to those using incandescent light bulbs as the light source, and since the monochromatic light of the light emitting diode is directly used for signal display, there is no need for coloring means such as color filters. Since it does not generate heat, it has become possible to simplify its configuration, but there are still unresolved technical aspects such as visibility and compatibility with conventional products.

The present invention solves such unresolved issues, and the first invention is a plurality of parabolic reflection panels each formed on the front surface of a mirror body, each of which has a plurality of light emitting diodes used as a light source. The irradiated light can be prevented from diffusing.

In addition, the second invention has a structure in which a cap is placed on the back side of a mirror body in which a plurality of light emitting diodes are arranged, which allows it to be handled in the same way as a commonly used incandescent light bulb. be.

Furthermore, the third invention is such that a plurality of light emitting diodes are connected in series to form a series circuit, the series circuits are connected in parallel in at least three columns, and at least one column of these series circuits is connected in parallel. It has a structure in which a light intensity adjustment switch is connected in series, and the overall light intensity can be adjusted by opening and closing this switch. Also, since a capacitor is connected in series with at least one series circuit, it can be used to prevent flickering. We can expect the following effects.

A detailed explanation will be given below according to the illustrated embodiment.

Figure 1 is a perspective view of the back side of the device of this invention, where 1 is a reflecting mirror, 2 is a substrate, and 5 is an Edison-based current-carrying base, which together constitute one mirror body. It is.

Figure 2 shows the details of the reflector 1, the substrate 2, and the red, yellow, or green light emitting diode 3.The reflector 1 is obtained by integrally molding synthetic resin, and its front surface has multiple areas. Each of the divided portions is formed with a parabolic reflecting portion 1a.

The reason for forming the reflective part 1a is to efficiently irradiate the light emitted from the light emitting diode 3 in the target direction.Although it is not shown in this figure, the reflective layer is formed by vapor depositing aluminum. It is formed.

A socket 4 is arranged approximately at the center of each reflecting section 1a, so that the light emitting diode 3 can be mounted therein.

Therefore, the reflecting mirror 1 is divided into a plurality of parts, and the light emitting diode 3 is located in each reflecting part, forming one light source.

Incidentally, the reflecting part 1a may have a hole 4' into which the terminal 3a of the light emitting diode 3 is inserted, as shown in FIG. 3, instead of arranging the socket 4 as described above.
The terminal 4a may be connected to the substrate 2 located on the back surface through soldering or other means.

The substrate 2 is placed in close contact with the back surface of the reflecting mirror 1, and a pair of printed wiring 2 is disposed on the surface that is in close contact with the back surface of the reflecting mirror 1.
a, 2b are applied, and these printed wiring 2a, 2
The ends 2a' and 2b' of b are arranged in opposing relationship as shown.

With this arrangement, when the terminal 3a of the light emitting diode is connected to the end 2a' + 2b', the printed wirings 2a and 2b are connected in series through this light emitting diode, and other printed wirings 2c end 2c
By connecting the terminals of the light emitting diodes in ', electrical communication is established, and it becomes possible to connect all the light emitting diodes in series through these printed wirings.

This is effective when using a light emitting diode with a low driving voltage on a commercial power supply.For example, if the driving voltage of a light emitting diode is 1.6V, at a power supply of 100V, approximately 62 light emitting diodes can be directly driven by connecting them in series. becomes possible.

Note that if the illuminance of the light source formed by the collection of light emitting diodes obtained in this way is insufficient, the amount of light can be increased by further connecting the light emitting diodes connected in series in a similar manner in parallel.

On the back side of the board 2, a cap 5 for power supply as shown in FIG. The printed wiring and the base 5 are lead wires (not shown).
The connection is made by soldering.

The cap 5 can also be an Edison base as shown in the figure.
Alternatively, it may be of a terminal type used as a railway signal.

Figure 4 shows the circuit diagram for powering the light-emitting diode described above, where 6 is a full-wave rectifier, R is a protective resistor, C is a ripple absorption capacitor, and 3 is formed by connecting multiple light-emitting diodes in series. In this example, two light sources using a plurality of light emitting diodes are connected in parallel.

Figure 5 shows protective resistors R and R in series with the light emitting diode.
′ are connected to each other, and this is used for correction when, for example, a voltage higher than necessary is applied to each of the light emitting diodes connected in series when adjusting the light intensity, and a protective resistor is inserted in one of the columns. It may also be a configuration.

FIG. 6 shows an example in which a switch 7 for adjusting the amount of light is interposed, and by opening and closing this switch 7, the amount of light can be changed depending on nighttime, daytime, or outside light.

In Figure 7, a capacitor 8 is further connected in series to the series circuit of light emitting diodes 3. By connecting in this way, a current phase is generated in one row of light emitting diodes, which is effective for preventing flicker. It is.

FIG. 8 shows an example of alternating current conduction, in which light emitting diodes 3 are connected in parallel with mutually different polarities and then connected in series.

By connecting in this way, the lights are turned on alternately every AC half cycle, so a full-wave rectifier can be made unnecessary.

The effects of this invention can be listed as follows.

That is, in the present invention, since the light emitting diode as a light source is attached to the mirror body by insertion or soldering,
It is possible to remove the light emitting diode, and even if any of the light emitting diodes breaks, it can be repaired at low cost by simply replacing the broken light emitting diode without replacing the entire lamp. .

Furthermore, in the first invention, each of the plurality of light emitting diodes is positioned on each of the plurality of parabolic reflecting mirrors provided in the mirror body, so that the irradiation efficiency can be further improved. Furthermore, when placed on the road or on a railway, the irradiated light is not scattered and has good visibility.

The second invention is equipped with a base so that it can be handled in the same way as an incandescent light bulb, so it can be used with conventional signal lights without any special modifications, is highly compatible, and can be easily replaced even in an emergency. It has the effect of saying that it can be done.

The third invention is to connect a light amount adjustment switch in series to at least one series circuit of a plurality of series circuits formed by connecting a plurality of light emitting diodes connected in series in parallel, and to open and close this switch. By doing so, it is possible to switch the light intensity of the entire lamp according to night and daytime or outside light, and since a capacitor is connected in series to at least one series circuit, a current phase is generated in this series to prevent flickering. This is effective and can have a great effect on improving visibility.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a signal lamp device according to the present invention, Fig. 2 is an exploded perspective view of the first fixed part, Fig. 3 is a perspective view showing another embodiment of the reflector, and Fig. 4 is a perspective view of the light source. The current supply circuit diagrams, FIGS. 5 to 8, are examples of connection diagrams for light emitting diodes. 1: Reflector, 1a: Reflector, 2: Substrate, 3: Light emitting diode, 5: Base.

Claims (1)

[Scope of Claims] 1. Consisting of a plurality of light emitting diodes emitting light of the same color, red, yellow, or green, and a mirror body having a plurality of parabolic reflecting parts on the front surface, the plurality of light emitting diodes 1. A signal light device comprising: light emitting diodes, each of which is removably attached to each parabolic reflecting portion of the mirror body. 2. A plurality of light emitting diodes emitting the same color of red, yellow, or green are each removably attached to a mirror body, and a base for energizing is provided on the back of the mirror body. Signal light device. 3 A plurality of red, yellow, or green light emitting diodes are connected in series to form a series circuit, and the series circuits are connected in parallel in at least three columns, and among the at least three series circuits, A signal lamp device comprising: a light amount adjustment switch connected in series to at least one series circuit; and a capacitor connected in series to at least one series circuit.