JPH06140002A - High-pressure discharge lamp - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention can not only provide a high-pressure discharge lamp that can actively perform staging lighting related to landscape lighting and that is low in labor costs and initial equipment costs. Without
A high-pressure discharge lamp that not only can improve luminous characteristics such as efficiency, but also can easily perform indoor and outdoor production lighting, maintain the same illuminance by using color temperature for day and night, and save power. The purpose is to provide. A discharge lamp in which a plurality of arc tubes that can be switched and lighted alternately are arranged in an outer bulb having a base at an end thereof is composed of a plurality of arc tubes having different color temperatures.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a high pressure discharge lamp having a plurality of arc tubes built therein, and more particularly to an improvement in a discharge lamp in which arc tubes having different color temperatures can be switched over and turned on.

[0002]

2. Description of the Related Art A high-pressure discharge lamp in which a plurality of arc tubes are mechanically and electrically supported in an outer bulb can provide various lamp characteristics with a single lamp, and is therefore proposed as a light source for mixed light illumination. ing. As the arc tube of the high-pressure discharge lamp for this kind of mixed lighting, various combinations of a high-pressure sodium lamp arc tube and a metal halide lamp arc tube and / or a high-pressure mercury lamp arc tube are conceivable, but the biggest problems are Since the starting characteristics of the arc tubes are different, it is difficult to light and restart both arc tubes easily and reliably, and the starting device is complicated and expensive, and it has not been put to practical use.

Therefore, when mixed lighting such as street lighting and plaza lighting is required, the lamps are often housed in separate lighting fixtures, floodlights and the like. However, each projector and ballast are required, and not only the initial equipment cost becomes high, but also the wiring becomes complicated. Further, since different kinds of lamps are housed in different projectors, there are drawbacks such that it is difficult to perform ideal mixed light illumination because it is easily restricted by the light distribution control.

In recent years, landscape lighting of buildings, trees, etc. has been actively carried out. As this kind of lighting method, it has been attempted to enhance the lighting effect by exchanging the light source according to the change of the season. Has been. For example, a metal halide lamp with high luminous efficiency and good color rendering and white light is used to produce a vivid and cool green color of trees from spring to summer. A high pressure sodium lamp with an orange color is used.

Depending on the season, the lamp of one luminaire is replaced or two luminaires containing different lamps are switched and used depending on the season. However, when replacing the lamp, not only is the work dangerous due to the location of the lighting fixture, but also the cost for maintenance and inspection increases. Also, several lighting fixtures are required, which not only increases the equipment cost but also increases the space such as the installation place. Further, there is a drawback that it is difficult to change the different lamps in a short time according to the date and time.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and a discharge lamp is constructed by arranging a plurality of arc tubes, which can be alternately switched on and turned on, in an outer bulb, and each of the plurality of light emission tubes. By making the color temperature of the tube different, it is possible to positively perform staging lighting related to landscape lighting, and it is possible to provide a high-pressure discharge lamp that saves labor and costs such as initial equipment costs.
Also, by controlling a large number of discharge lamps from the outside at the same time, the color temperature of the arc tube can be changed in a short period of time, which not only broadens the range of effects, but also in indoor spaces such as atriums and halls as well as outdoors. Lighting can be done easily. Further, it is another object of the present invention to provide a high pressure discharge lamp capable of maintaining the same illuminance by using color temperatures in daytime and nighttime and maintaining power consumption.

[0007]

In order to solve the above-mentioned problems, the present invention relates to a discharge lamp in which a plurality of arc tubes are arranged in an outer bulb having a base at an end thereof, and each arc tube is switched and turned on. The plurality of arc tubes have different color temperatures. Further, each of the plurality of arc tubes has different tube inputs. The plurality of arc tubes are arc tubes having a color temperature of 2000K to 2500K, in which a predetermined amount of sodium, mercury and an inert gas are enclosed in a translucent alumina arc tube, and mercury and an inert gas in a quartz arc tube. Is a high pressure discharge lamp comprising an arc tube having a color temperature of 4000 K to 6000 K. Furthermore, the tube input of the first arc tube having a high luminous efficiency and the tube input of the second arc tube having a low luminous efficiency are set so that the luminous fluxes of the respective arc tubes having different luminous efficiencies are substantially the same. Correspondingly different. Further, as the base, a metal shell part is used as a common wire, and a lighting circuit is formed on the insulating bottom part by each contact of the plurality of contacts and the shell part.

[0008]

With the above structure, it is possible to positively perform effective production illumination due to the difference in color temperature of the respective arc tubes arranged in the common outer bulb. Further, it is possible to select and combine lamps having different color temperatures due to the difference in the tube input of each arc tube, and it is possible to perform a wide range of indoor and outdoor production lighting.
Then, it is possible to change the emission color of the arc tube between orange light and white light. Further, it is possible to save power while keeping the total luminous flux of each arc tube substantially the same.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of a high-pressure discharge lamp, in which 1 is an outer bulb made of hard glass, and a pin-shaped base 2 is fixed to one end. In addition, 2 inside through the arc tube mount structure
The individual arc tubes 3 and 4 are supported. The first arc tube 3 is a high-pressure sodium lamp arc tube in which a xenon gas is sealed together with a predetermined amount of sodium and mercury in a translucent alumina tube, and the arc tube 4 is a high-pressure mercury tube in which mercury and argon gas are sealed in a quartz tube. It is an arc tube for a lamp. In the arc tubes 3 and 4, a common external lead-out wire that leads to the outside is connected to the metal shell portion 2a of the base 2, and the other lead-in wire of each arc tube is connected to the eyelet portions 2b and 2c, respectively. There is. A starting device is provided in the outer bulb 1 to facilitate starting of the arc tube 3 if necessary. Further, a ring-shaped getter is connected to the mount structure, the inside of the outer bulb is supported in vacuum, and a fluorescent substance or the like is attached to the inner surface of the outer bulb to control the orientation characteristics of each arc tube.

FIG. 2 shows an example of a lighting circuit for the high-pressure discharge lamp. A common external lead-in wire 6a of the arc tubes 3 and 4 arranged in the discharge lamp 5 is a ballast through a shell portion 2a of a base. 7, the external introduction line 6b of the arc tube 3 is connected to the eyelet portion 2b of the base, and the external introduction line 6c of the arc tube 4 is connected to the ballast 7 through the eyelet portion 2c of the base. The external lead-in wire 6a connected to the ballast 7 is connected to one end of the choke coil CH1, the external lead-in wire 6c is connected to one end of the switching relay L, and the external lead-in wire 6b is connected to one end of the switching relay L via the auxiliary choke coil CH2. Each is connected. The other end of the choke coil CH1 and the other end of the switching relay L are connected to the power source 8 via the power factor improving capacitor C. The ballast 7 is connected to a control line for switching and lighting each of the light emitting tubes 3 and 4 by an external switch or the like, so that a large number of discharge lamps can be collectively switched by one external switch. Has become.

Next, a concrete embodiment will be described with reference to FIG. As the arc tubes 3 and 4, an arc tube for a high-pressure sodium lamp with a tube input of 110 W and an arc tube for a high-pressure mercury lamp with a tube input of 200 W are used, and a choke coil of high power factor type and an auxiliary choke coil are used as a ballast to supply power. Voltage 2
When 00V was applied, the discharge lamp 5 became a white light lamp, and the emission of the high pressure mercury lamp was recognized. The color temperature of this lamp was about 4100 K, the lamp voltage was 120 V, and the total luminous flux was about 8000 lm. Next, when the same voltage of 200 V as the power supply voltage was applied to the control line connected to the relay L, the contact of the relay was switched and the discharge lamp 5 emitted orange light. At a voltage of 115 V, the total luminous flux was about 8000 lm as described above. Further, when a lighting experiment of the discharge lamp was performed, when each arc tube was lit for a predetermined time and then switched and lit, a life characteristic of about 12000 hours was obtained.

Generally, a 200 W high pressure mercury lamp (H
The total luminous flux of (F200X) is about 9900 lm, 110
The total luminous flux of the W high-pressure sodium lamp (NH110FL) is about 10600 lm. However, in the case of the above discharge lamp, since two arc tubes are arranged in the common outer bulb, each arc tube blocks light to 20 % Decrease in luminous flux is seen. However, regarding the life characteristics, the same characteristics of 12,000 hours as those of each lamp were obtained.

Further, the luminous efficiency of a high-pressure mercury lamp is generally 3
0 to 60 lm / W, high pressure sodium lamp 70 to 1
Since the luminous flux is 25 lm / W and the luminous efficiency is almost doubled, the luminous flux of each luminous tube is made substantially the same, and the luminous tube of the above-mentioned tube input is selected in order to enhance the effect of landscape lighting. is there. This indicates that an arc tube for a high-pressure mercury lamp of 400 W can be selected as an arc tube for a high-pressure sodium lamp of 220 W, and an arc tube of 450 W for 1000 W can be selected. Furthermore, in the case of a discharge lamp in which a metal halide lamp arc tube and a high-pressure sodium lamp arc tube are placed in a common outer bulb and can be switched over and switched to each other, a combination of tube inputs of each arc tube is selected in consideration of each luminous efficiency. It is clear that this is possible.

In the above embodiment, the color temperatures are different from each other.
The case of three kinds of arc tubes has been described, but the case of three kinds or more is also possible. Further, in the above-mentioned embodiment, the high pressure discharge lamp comprising the arc tube for the high pressure sodium lamp and the arc tube for the high pressure mercury lamp has been described, but metal halide, mercury and an inert gas are contained in each arc tube and the quartz arc tube. A discharge lamp can be constructed by appropriately combining two or more kinds of enclosed metal halide lamps.

As the arc tube, an arc tube for a high pressure sodium lamp having a color temperature of 2500K, an arc tube for a metal halide lamp having a color temperature of 3500K and / or a color temperature of 4500.
K or 6500K metal halide lamp arc tubes can be combined and selected.

In the above embodiment, the tube input is adjusted in accordance with the luminous efficiency of each arc tube so that the total luminous flux of each arc tube is substantially the same, but each arc tube having a different color temperature is used. May be turned on by almost the same tube input. With such a configuration, the production lighting such as landscape lighting or indoor space lighting can be selected at any time with good variation, and the range of selection can be further expanded.

Further, in the high pressure discharge lamp according to the present invention,
A pin-type base having three or more contacts is required as the base, and it is difficult to connect the lead-in wire during lamp production with a screw-based base that is generally used. Further, in the above-described embodiment, the discharge lamp in which the base is fixed to one end of the outer bulb has been described, but the present invention is also applicable to a double-ended discharge lamp having a base at both ends.

[0018]

As is apparent from the above description, the present invention enables a wide variety of indoor and outdoor production lighting to be performed more effectively with a relatively simple structure, and its industrial utility value. Is big. Moreover, not only can total cost such as initial capital investment and maintenance cost be reduced,
There are advantages such as large power saving and energy saving effects.

[Brief description of drawings]

FIG. 1 is a side view showing an example of a high pressure discharge lamp according to the present invention.

FIG. 2 is a side view showing an example of a lighting circuit of the same.

[Explanation of symbols] 1 outer bulb 2 base 3,4 arc tube 5 high pressure discharge lamp 6a, 6b, 6c external lead-in wire 7 ballast 8 power supply CH1 choke coil CH2 auxiliary choke coil L relay C capacitor

Claims (4)

[Claims] 1. In a discharge lamp in which a plurality of arc tubes are arranged in an outer bulb having a base at an end and the arc tubes are switched on and turned on, the color temperatures of the arc tubes are different from each other. Characteristic high-pressure discharge lamp. 2. The high pressure discharge lamp according to claim 1, wherein the tube inputs of the plurality of arc tubes are different from each other. 3. A plurality of arc tubes are arc tubes having a color temperature of 2000 K to 2500 K and a quartz arc tube in which a predetermined amount of sodium, mercury and an inert gas are enclosed in a translucent alumina arc tube. A light emitting tube having a color temperature of 4000K to 6000K filled with an inert gas.
High-pressure discharge lamp according to item 2 and item 2. 4. The tube inputs of a first arc tube having a high luminous efficiency and a second arc tube having a low luminous efficiency so that all luminous fluxes of the arc tubes having different luminous efficiencies of the plurality of lamps are substantially the same. 4. The method according to claim 1, wherein the luminous efficiency is different according to the luminous efficiency.
High-pressure discharge lamp according to the item.