JP2852895B2 - Multi-light type color light signal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a railway traffic light, and more particularly to an electric three-position, multi-light, color-lighted traffic light.

[0002]

2. Description of the Related Art A color light type traffic light is a traffic light of a type that presents a signal according to the color of the light throughout the day and night, and is used in an automatic signal section. There are three lamps, four lamps, and five lamps in the multi-lamp type. In each case, a combination of single lamps is vertically arranged.

The luminaire has a socket for mounting a 30 V, 45 W multi-filament bulb and a combination of two lenses, and the relative positions are set so that the filament of the bulb is fixed at the focal point of the lens. . As the lens, a stepped lens is used as shown in FIG.
1, the inside is a colored (red, yellow (accurately orange-yellow), green) outer surface stepped lens 22. The stepped lens is lightweight, has a small combined focal length, and can use a large amount of light emitted from the bulb 23.

[0004] The signal bulb is a multi-lamp type traffic light of 30V, 45V.
W (G type) is used, and the mutual distance between the lens and the filament is strictly defined for focusing.

[0005] The signal bulb is used at a voltage of 80 to 90% of the rated voltage, and its life is extended up to about 5000 hours. However, when the voltage is reduced by 1 V, the light power is reduced by 12%. For this reason, the usage limit of the signal light bulb is limited so that the usage period does not exceed two years.
Month.

[0006] The bulb is lit for 24 hours at the rated voltage before use, and when replacing it, first use a new stop lamp,
The light bulb used for the stop light is used as a traveling light, and the light bulb of the progress light is used for a caution light in order.

[0007] On the other hand, the use of a light added to indicate a warning or a deceleration signal is limited to 2000 hours, and this light does not move. As for other lights, the traffic light that indicates a warning signal first turns a new one into a yellow light (caution light), then a red light (stop light),
The order of the green lights (progressive lights), in the case of a deceleration signal, is attached to the progression light first, and then moves to the stop and caution light. It is customary to use the lighting sequence (Koyusha Co., Ltd., Signal, Showa 41, pp. 85-89).

As described above, as long as the signal bulb is used, the life thereof ends at a relatively early stage, so that troublesome management is required for its management. Moreover, changing the light bulbs at traffic lights on long tunnels and bridges is also very dangerous.

There has been an early request to use a light emitting diode (hereinafter referred to as an LED) as a light source of a traffic light in order to solve this problem.
Because of its weakness (low luminosity), the use of LEDs was limited to yellow light and red light, and the conventional light bulb had to be used for green light.

[0010] However, recently, a high-brightness blue-green light emitting LED has been developed.
ED can be used.

[0011]

SUMMARY OF THE INVENTION
Yellow and green tones are specified in JISE-3303, and use of arbitrary colors is not allowed. In addition, there is no luminous intensity (number of candela) for traffic signals in the Ministry of Transport regulations,
According to the conventional JRS, "it can be seen 600 m with 0.8 times the voltage in bright sunlight".

[0012] The life of the LED is such that the luminous intensity gradually decreases over time and the luminous intensity is reduced to half.
After about 30,000 hours, they will be replaced. Therefore, when it is new, it must have a luminous intensity that is twice the specified brightness.

On the other hand, the way light arrives depends on the color,
The LED that emits green light having a short wavelength has the largest attenuation. However, in the traffic lights of the 4th and 5th indications, in the yellow light-green light (attenuated signal), the brighter of the yellow light than the green light is the safer side. It is desirable that the lighting indicator be the brightest.

As described above, each color LED has its own characteristics and there are operational restrictions, so that it is not sufficient to simply replace the signal bulb with the LED.

SUMMARY OF THE INVENTION An object of the present invention is to provide a multi-lamp type color light type traffic light which emits light of each color in a well-balanced manner by using LEDs for light emission of red, yellow and blue-green.

[0016]

In order to achieve the above object, in a multi-light type color light type traffic light according to the present invention, the light sources of red, yellow, and green lamps are respectively red, yellow, and blue. A multi-lamp type color light type traffic light using a green light-emitting diode, wherein the total number N of light-emitting diodes used for each lamp is the same, and the light-emitting diodes are arranged separately in the lamps. Each unit is connected to an electric circuit to form a light emitting unit, and the electric circuit is connected to a DC power supply by connecting a plurality of resistors and a plurality of light emitting diodes connected in series to each other in parallel. Yes, the electric circuit of the red light and the yellow light is n
_{A single} light emitting diode connected in series with m ₁ connected in parallel, a green light electric circuit is an n ₂ light emitting diode connected in series with m ₂ connected in parallel, where n ₁ > N ₂ m ₁ <m ₂ (n ₁ , n ₂ = ₁ , _2, 3,..., N) (m ₁ , m ₂ = 1, 2,...), And the DC power is supplied from the same AC power. The obtained AC voltage is rectified for each electric circuit to supply DC to the light emitting diode, and the electric circuit of each lamp has the same impedance.

The light emitting unit of each lamp has two sets of electric circuits, and each electric circuit is connected to a DC power supply for each electric circuit.

The multi-light type color light type traffic light is a traffic light of four or five lights, and an electric circuit of two lights of yellow light or two lights of yellow and green lights simultaneously displayed is connected in series. One of the DC power supplies connected to each of the electric circuits is for supplying power to both electric circuits, and the voltage of the DC power supply for supplying both electric circuits is connected to the other electric circuit. And the impedance of the electric circuit of the two lamps is matched identically.

The DC power supply includes an insulating transformer and a rectifier. The insulating transformer supplies AC power to the rectifier, and electrically disconnects the AC power supply wiring from each other to emit light. The rectifier rectifies the AC power supply voltage and supplies power to the electric circuit of each lamp.

Further, the insulating transformer provided in the DC power supply of the two electric circuits of the yellow lamp or the electric circuit of the two lamps of the yellow lamp and the green lamp simultaneously presents the AC power supply voltage of 100V to 200V. It supplies power to each rectifier.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. 1 and 2, a substrate 3 on which an LED 2 is mounted is housed in a circular hollow case 1 having an open front. The arrangement of the LEDs 2 mounted on the substrate 3 is not particularly limited. However, the LEDs 2 are dispersed concentrically or vertically and horizontally evenly and densely throughout the case 1. Each LED 2 is connected in series and parallel to a power supply wiring.

A transparent cover 4 is superimposed on the opening edge of the case 1 to form a lamp 5. The lamp 5 is seated on an opening seat of a light box 6, as shown in FIG. 8 is screwed into the ring 7 and tightened.

The lamp 5 equipped with the LED 2 is a light emitting unit. For the respective light-emitting units, red, yellow, and blue-green light-emitting LEDs are incorporated into the LEDs to form red, yellow, and green light-emitting units. As shown in FIG. The yellow light emitting unit 9b is incorporated in the middle stage and the red light emitting unit 9c is incorporated in the lower stage to constitute a three-lighted, multi-lamp type color light type traffic light. The procedure is exactly the same for the 4th and 5th traffic lights.

In the present invention, the setting of the standard of the center luminous intensity of the colored light signal and the visual recognition distance is as shown in Table 1.

[0025]

[Table 1]

In the embodiment of the present invention, LEDs having the specifications shown in Table 2 were used (red light-emitting LED: manufactured by Stanley, yellow light-emitting LED: manufactured by HP, blue-green light-emitting LED: Nichia Corporation) Made). If 580 cd is initially required for a blue light, 230 blue-green light emitting LED (2.5 cd) chips in Table 2 may be used. In the present invention, one light-emitting unit emits red, yellow, and blue-green light. 228 light-emitting LEDs were used for each.

[0027]

[Table 2]

FIG. 5 shows the chromaticity diagram of the LED shown in Table 2 and the chromaticity of the signal display. As can be seen in FIG. 5, the green range is wide and the red range is narrow. As can be seen from the wavelength scale, the human eye is more sensitive to green than to red or yellow, and appears to be distinctly different colors for wavelengths of 495 mm and 500 mm. In the figure, the symbol ● represents an LED, and the LED represents a color similar to that of a current traffic light using a signal bulb indicated by ▲.

In this embodiment, for each of the red light (R), the yellow light (Y), and the green light (G), N = 228 LEDs 2 are concentrically mounted on the substrate 3 and are mounted on the case 3.
The power supply wiring cord 10 was pulled out from the back surface of the case 1 and its tip was connected to a connector. Substrate 3
A black resin was injected into the upper portion, and the two were fixed to each other except for the front surface of each LED 2, and the heat radiation of the heat generated from each LED 2 was enhanced.

FIGS. 6A and 6B show an electric circuit of the LED. FIG. 6A shows a basic configuration of an electric circuit 11a of red (R) and yellow (Y) LEDs, and FIG. 6B shows a basic configuration of an electric circuit 11b of green (G) LEDs. In the red light (R) and the yellow light (Y), the resistor R ₁ and n ₁ = 38 LED2 chips are connected in series, and the connection is connected in parallel with m ₁ = 3. One set, yellow and red light emitting unit 9
b and 9c are mounted on the substrate 3 as shown in FIG.

On the other hand, in the green lamp (G), the resistor R ₂ and n ₂ = 1
The chips of 9 LEDs ₂ are connected in series, and the connections are connected in parallel to m ₂ = 6 pieces to form one set. The two sets are combined in parallel with the green light emitting unit 9a and mounted on the substrate 3. ing. As for the setting of the resistors R ₁ and R ₂ , R ₁ = 1.8 KΩ for a yellow light, R ₁ = 2.0 KΩ for a red light, and R _{1 for} a green light.
₂ = 3.3 KΩ was selected, and a setting was made so that 13 mA was supplied to the LED emitting green light, 18 mA to the yellow light emitting LED, and 18 mA to the red light emitting LED for one chip at an applied voltage of 100 V DC.

FIGS. 7A and 7B show an electric circuit of the light emitting unit. FIG. 7A shows the yellow and red light emitting units 9.
FIG. 7A shows an electric circuit of the green light emitting unit 9a. In each case, each set of electric circuits 11
a and 11b are connected to a rectifier 12 serving as a DC power supply.
Connected to an AC power supply. Each electric circuit has the same impedance due to the above circuit configuration.

The total number N of LEDs used in each electric circuit, the numbers n ₁ and n _{2 of} LEDs included in the same connection, and the numbers m ₁ and m _{2 of} connections
Is not limited to the above example, and other combinations for matching the impedance of the electric circuit of each lamp are also possible. In the present invention, n ₁ > n ₂ (n ₁ , n ₂ = 1, 2,...) By using a combination of LEDs having the characteristics shown in Table 2.
N) and (m ₁ , m ₂ = 1, 2,...) Are satisfied to realize N = n ₁ × m ₁ = n ₂ × m ₂ . In a traffic light using a signal bulb, 30 V is used as a signal control voltage,
In the present invention, a 100 V AC power supply is rectified and a 100 V DC voltage is applied to each electric circuit. As a result, the power consumption is reduced, the circuit current is reduced to about 1/10, and it is not necessary to consider the cable drop of the power supply wiring cord.

It is known that the LED 2 is slightly lit even when a current of several mA flows. Light emitting unit 9a
To 9c, an induction transformer is inserted into each of the electric circuits 11a, 11a, 11b, and 11b to insulate the electric circuits from the wiring cable 10 of the AC power supply to reduce the induction to 1/1.
It can be suppressed to 0 or less. LE used in this embodiment
It was confirmed that D lighted slightly at about 40 V. However, by disconnecting each electric circuit from the power supply side wiring under the signal control condition with the insulating transformer 13, the weak lighting of the LED was prevented and the voltage adjustment was easy. Becomes

Equalizing the impedance of the electric circuit of each of the light-emitting units 9a to 9c is important when a two-light lighting circuit for two-light emission is formed in the four-light and five-light signals. “Deceleration indication” is indicated by simultaneous lighting of two lights (Y ₃ , G _A ) of a yellow light emitting unit and a green light emitting unit, and “warning indication” is indicated by two lights of a yellow light emitting unit and a red light emitting unit ( This is indicated by simultaneous lighting of Y ₃ and G _C ).
FIG. 8 shows an example of “deceleration indication”. The electric circuit 11a of the yellow light emitting unit 9b and the electric circuit 11b of the green light emitting unit 9a are separately connected to the insulating transformer 13 via the rectifier 12, and emit light when supplied from an AC power supply. Each electric circuit 11
and the electric circuit 11b of the green light emitting unit 9a is connected in series, and the insulating transformer 13 connected to the yellow light emitting unit 9b boosts AC 100V to 200V and supplies power to the rectifiers 12,12. Thereby, 100 V DC is supplied to the electric circuits 11a and 11b of the two light emitting units 9b and 9c having the same impedance, respectively.
Luminous intensity of the yellow light emitting unit and the blue light emitting unit is secured. When at least one of the LEDs of one of the light emitting units is disconnected, both lamps are similarly reduced in luminous intensity or are simultaneously turned off. This is the same for the two-lighting circuit of the warning display.

[0036]

As described above, according to the present invention, an electric circuit is formed according to the characteristics of the LEDs used for the red light, the yellow light and the green light, and the impedance of the electric circuit of the light emitting unit is set to be equal. There is no sense of inconsistency in the visibility of the light emission, and each lamp can be lit in a well-balanced manner not only when each lamp is lit alone, but also when two lamps are lit at the same time. Maintains balance and does not show false indications. In addition, the diffusion angle is ± 3 for the bulb-type diffusion angle.
゜ is expanded to more than ± 5 ゜ by using LED,
The visibility of the signal can be improved.

The control voltage of each light emitting unit is set to 1 AC.
The control current can be reduced by using 00V, the voltage drop in the power cable can be suppressed, and the signal transformer can be easily adjusted. Further, since an insulating transformer is provided for each lamp to lower the impedance of the traffic light, there is an effect that the weak lighting of the LED due to the induced voltage can be suppressed.

[Brief description of the drawings]

FIG. 1 is a partially sectional front view of a light emitting unit used in the present invention.

FIG. 2 is a partial sectional side view of a light emitting unit.

FIG. 3 is a cross-sectional view showing a state where a light emitting unit is attached to a light box, and is a portion corresponding to line AA in FIG. 4;

FIG. 4 is a diagram showing an example of a multi-light type color light type traffic light of the present invention.

FIG. 5 is a diagram illustrating a chromaticity diagram and a chromaticity of a signal display.

6A is an electric circuit diagram of an LED of a yellow and red light emitting unit, and FIG. 6B is an electric circuit diagram of a green light emitting unit.

7A is a diagram illustrating an electric circuit of an LED of a red and yellow light emitting unit, and FIG. 7B is a diagram illustrating an electric circuit of a green light emitting unit.

FIG. 8 is a diagram showing a two-lighting circuit showing the deceleration.

FIG. 9 is a diagram showing a relationship between a signal bulb and a signal lens used in a conventional traffic signal.

[Explanation of symbols]

 Reference Signs List 1 case 2 LED 3 board 4 transparent cover 5 lamp 6 light box 7 ring 8 bolt 9a green light emitting unit 9b yellow light emitting unit 9c red light emitting unit 10 power supply wiring cords 11a, 11b electric circuit 12 rectifier 13 insulating transformer

Claims (5)

(57) [Claims] 1. A multi-light type color light type traffic light using red, yellow, and blue-green light emitting diodes as light sources of red, yellow, and green lamps, respectively. The total number N of the light emitting diodes is the same, and the light emitting diodes are arranged in a distributed manner. The light emitting diodes are connected to an electric circuit for each lamp to form a light emitting unit. A plurality of light-emitting diodes connected in series and connected in parallel to a DC power supply, and an electric circuit of a red light and a yellow light is a connection in which n ₁ light-emitting diodes are connected in series. the concatenation _one m parallel, the electric circuit of the green lamp, a connection to the n ₂ light emitting diodes in series connection those m ₂ this parallel connection, however, n _1> n ₂ m ₁ <m ₂ (n ₁ , n ₂ = ₁ , _2, 3,..., N) (m ₁ , m ₂ = 1, 2,...) A multi-lamp type, in which the AC voltage supplied from the same AC power supply is rectified for each electric circuit to supply DC to the light emitting diode, and the electric circuit of each lamp has the same impedance. Light type traffic light. 2. The light-emitting unit of each lamp has two sets of electric circuits, each electric circuit being connected to a DC power supply for each electric circuit. Multi-light type color light type traffic light. 3. The multi-light type color light type traffic light is a traffic light of four or five lights, and an electric circuit of two lights of yellow light or two lights of yellow and green lights simultaneously displayed is connected in series. And one of the DC power supplies connected to each electric circuit is for supplying power to both electric circuits, and the voltage of the DC power supply for supplying electric power to both electric circuits is connected to the other electric circuit. 3. The multi-lamp color lamp type traffic light according to claim 1, wherein the signal is twice as high as the voltage of the DC power supply and the impedance of the electric circuit of the two lamps is matched identically. 4. The DC power supply includes an insulating transformer and a rectifier. The insulating transformer supplies AC power to the rectifier, and electrically cuts off light between the AC power supply wiring and each electric circuit to emit light. 4. A device for preventing weak lighting of a diode, wherein the rectifier rectifies an AC power supply voltage and supplies power to an electric circuit of each lamp.
The multi-light type color light type traffic light according to the above. 5. An insulation transformer provided in a DC power supply of two electric circuits of a yellow lamp or two electric lamps of a yellow lamp and a green lamp simultaneously displayed, boosts an AC power supply voltage of 100V to 200V. 5. A power supply for each rectifier.
The multi-light type color light type traffic light according to the above.