KR101069717B1 - High intensity discharge lamp - Google Patents

Abstract

The present invention relates to a high-brightness discharge (HID) lamp of 60-90W class that is capable of quick start and can be applied as a street lamp or an indoor lamp by maximizing lamp efficiency and lifespan.
The high-brightness discharge lamp according to the present invention is composed of 42% by weight of halides of Group 12 or 13, 38 to 48% by weight of Na or Sc halide, and 10 to 20% by weight of Er halide as a light emitting material filled in the light emitting tube. It is characterized by consisting of a metal halide.
In addition, the high-brightness discharge lamp according to the present invention has a power consumption of 60 ~ 90W class, the interval between the pair of electrodes is made of 6 ~ 8mm, the length ratio of the long axis and short axis of the discharge tube is 12: 8 Characterized in that consists of.
The high-brightness discharge lamp according to the present invention is capable of instantaneous lighting for a medium-sized HID lamp of 60 to 90W class, which has not been commercialized since instantaneous lighting is impossible, and has a service life which is a disadvantage of the conventional discharge lamp capable of instantaneous lighting. There is an effect that can be extended by more than two times, in particular, the efficiency (Lumen / W) representing the brightness of the power consumption of the lamp and maximizes the life of the lamp, it is a very useful invention that can be applied for street lamps and indoor lighting.

Description

High Intensity Discharge Lamp

The present invention relates to a high-efficiency discharge lamp capable of quick start, and in particular, the present invention discloses a high-brightness discharge (HID) lamp that can be applied to a street lamp or an indoor lamp by maximizing lamp efficiency and life.

Discharge lamps currently used in street lamps, security lamps, etc. are mainly used for metal halide discharge lamps of 175W, 250W, and 400W. In case of re-lighting after the lights are turned off, the time required for the lighting to be completed is required to be at least 5 to 8 minutes, which is a great inconvenience to use for street lamps or security lights. In addition, metal halide 150W discharge lamps or CDMs (ceramic discharge lamps), which are increasing in demand such as indoor lighting or exhibition lighting in large marts, also cannot solve the problems of low efficiency and lighting time delay, which are the biggest disadvantages of discharge lamps. .

In particular, the need for high-efficiency bulbs is increasing in recent years to save energy worldwide, not only in developed countries but also in Southeast Asia and the Middle East.

High Intensity Discharge (HID) lamps that can turn on instantaneously are limited to 35W small lamps, but have been used as automotive bulbs, but their maximum brightness is only about 3,200 lumens. It is not applied due to insufficient capacity to be used for bulbs or street lamps for large mart exhibition halls, which require specifications of about 7,000 lumens.

In addition, the life of the existing small (35W class) discharge lamp capable of instantaneous lighting is only up to about 3,000 hours, there is a problem that can not be used as a light bulb that should have a life of more than 6,000 hours.

As a result, it is a 60 ~ 90W medium discharge lamp that can turn on instantaneously.Its life span can be over 6,000 hours, which is twice as long as the existing 35W automotive discharge lamp bulb, and the lamp efficiency (lumen / W) is at least 100. By proposing more discharge tubes, it is necessary to prevent waste of resources through energy saving while being applicable to lighting fixtures for metal halide discharge lamps that are already widely used around the world.

KR 10-2010-0031752 A KR 10-2005-0107457 A

The present invention is to solve the above problems of the conventional discharge lamp, it is possible to save energy by reducing the power consumption while maintaining the brightness, and to propose a high-brightness discharge lamp that enables instant lighting without a lighting delay time The purpose.

Furthermore, an object of the present invention is to propose a high-brightness discharge lamp that can extend the service life, which is the greatest disadvantage of the conventional discharge lamp that can be instantaneously doubled or more.

The present invention to achieve the above object,

A glass encapsulation 123 in which a low pressure gas is filled in an airtight state therein; A discharge tube 111 disposed inside the glass encapsulation body and provided with a pair of electrodes 112 spaced at predetermined intervals, and filled with a light emitting material; A getter 114 for maintaining gas purity inside the glass encapsulation body; A conductor 116 for applying an external voltage to each electrode of the discharge tube; A ceramic base (122) for sealing an open end of the glass encapsulation to prevent leakage of gas; In the high brightness discharge lamp which is provided inside the ceramic base, the molybdenum conductor 119 to apply a voltage to the conductor 116 while maintaining the airtightness of the glass encapsulation body,

The luminescent material is composed of 42% by weight of halides of Group 12 or 13, 38 to 48% by weight of Na or Sc halide, and 10 to 20% by weight of Er halide.

In addition, the high-brightness discharge lamp according to the present invention has a power consumption of 60 ~ 90W class, the interval between the pair of electrodes is made of 6 ~ 8mm, the length ratio of the long axis and short axis of the discharge tube is 12: 8 Characterized in that consists of.

In addition, the high-brightness discharge lamp according to the present invention is characterized in that the curved bridge 116a to prevent the reduction of life due to thermal expansion is included in the conductor 116.

The high-brightness discharge lamp according to the present invention is capable of instantaneous lighting for a medium-sized HID lamp of 60 to 90W class, which has not been commercialized since instantaneous lighting is impossible, and has a service life which is a disadvantage of the conventional discharge lamp capable of instantaneous lighting. There is an effect that can be extended more than twice.

In particular, it is a very useful invention to maximize the efficiency (Lumen / W) representing the brightness of the lamp compared to the power consumption and the life of the lamp, it is possible to apply for street lamps and indoor lighting.

1 is a configuration diagram of a single-ended HID lamp having a connection port;
2 is a configuration diagram of a double-ended HID lamp in both directions.

1 and 2 schematically show a discharge lamp according to the present invention, Figure 1 shows a discharge lamp in which the connection port is formed in one direction (also called single-ended), Figure 2 is a connection port formed in both directions (double (also referred to as -ended). FIG.

The high-efficiency discharge lamp according to the present invention is composed of a glass encapsulation 123 in which a high-efficiency instantaneous discharge lamp is built, and a base 122 coupled to the glass encapsulation and fixed to a luminaire socket.

A discharge assembly is provided inside the glass encapsulation 123. The discharge assembly includes a light emitting tube having a hollow ellipse shape, the pair of electrodes being spaced apart at regular intervals, and the bladder. Molybdenum foil 113 for applying a voltage to the electrode extending outside the both ends of the tube, and the conductor 116 connecting the outer lead conductor 121 and the molybdenum foil 113.

Molybdenum conductor 119 provided for airtightness of the glass encapsulation body 123 through the external inducting conductor 121 coupled to the base 122 and through the conductors 113 and 116 to the electrode 112 of the light emitting tube 111. The voltage is configured to be applied.

The spacing d of the electrodes 112 installed in the light emitting tube 111 can make the shape of the arc suitable and extend the service life through the design of the proper spacing, and the components of the metal halide inside the light emitting tube A It is configured to enable instant lighting even in high-brightness discharge lamps of 60W or higher.

In addition, by forming a curved bridge 116a in the conductor 116 provided inside the glass encapsulation 123, the molybdenum foil sealed in the discharge tube 111 due to thermal expansion generated during instantaneous lighting of the high-brightness discharge lamp. Functions to prevent the excessive stress is generated (113).

The enclosed space S inside the glass encapsulation 123 is filled with low pressure N2 gas or ARGON gas to maintain a constant air pressure even when the glass encapsulation 123 is turned on. The getter 114 maintains the purity of the glass encapsulation body 123 inside S, thereby extending the life of the discharge tube 111.

The technical core of the high-efficiency instantaneous discharge lamp according to the present invention is to solve the difficulty of the instantaneous illumination of the conventional high-brightness discharge lamp of 60 ~ 90W class, by halogenating the group 12 or 13 halides, Na or sc halides and Er By combining them individually, it is possible to enable instantaneous lighting.

More preferably, the metal halide of this invention is comprised by combining 42 weight% of halides of group 12 or 13, and 38-48 weight% of Na or Sc halide, and 10-20 weight% of Er halide. In particular, the weight ratio of [Na-halide: Er-halide] is most preferably [2: 1] to [3: 1].

In the high-brightness discharge lamp of the present invention, since the structure of the discharge tube 111 together with the combination structure of the metal halides is a component related to the instantaneous lighting function, according to the present invention, 42% by weight of halides of group 12 or 13, With respect to 40 weight% of Na or Sc halide, on the condition which combined 18 weight% of Er halide, the ratio of the long axis length (l) and the short axis length (w) of the discharge tube 111 is 12: 8 (error range +,- 5%).

The discharge tube structure of the present invention maximizes the light efficiency (lumen / watt) as the center of arc formation is maximized, and in particular, the wall reaction of the arc (composite wall of the discharge tube due to the arc) by a composite component with the electrode gap d. By minimizing the loss), the momentary lighting function can be obtained and the life effect of the lamp can be extended.

In general, the narrower the area of the electrode, the higher the current density and the lower the starting voltage and current, which is advantageous in terms of efficiency, but has the disadvantage of shortening the life of the lamp. Of course, if you want to increase the area of the electrode to extend the life only because it is not possible to secure the function of the instantaneous light will have to use the electrode of the most suitable area.

Hereinafter, by describing the comparative experimental example, the technical configuration of the high efficiency discharge lamp according to a preferred embodiment of the present invention will be described in more detail.

[Table 1] below is a table comparing life time according to electrode intervals.

Electrode spacing Example 1 Example 2 Example 3 Example 4 Example 5 Average 8 mm 6,350 hrs 6,600 hrs 6,100 hrs 6,200 hrs 6,450 hrs 6,340 hrs 7 mm 6,150 hrs 6,400 hrs 5,900 hrs 9,800 hrs 6,200 hrs 6,290 hrs 6 mm 6,300 hrs 6,200 hrs 6,500 hrs 6,120 hrs 6,300 hrs 6,280 hrs 5 mm 5,400 hrs 5,500 hrs 5,100 hrs 5,350 hrs 5,300 hrs 5,330 hrs 4mm 4,700 hrs 4,650 hrs 4,900 hrs 4,350 hrs 4,600 hrs 4,640 hrs 3mm 4,100 hrs 3,800 hrs 3,950 hrs 3,200 hrs 3,600 hrs 3,730 hrs

In the present invention, Examples 1 to 5 show the number of experiments performed under the same conditions. The same is true in the following description. In addition, the electrodes implemented in Examples 1 to 5 of the present invention were limited to those having a circular cross section having a diameter of 3.8 to 4.2 mm.

As can be seen in [Table 1], it can be seen that the life of the lamp increases as the distance between the electrodes. In other words, when the electrode interval is 6 ~ 8mm it was possible to secure a life of about 1.4 times longer than when the electrode interval is 4mm. However, when the electrode gap is too large, there may be a problem that the instantaneous light does not succeed.

Electrode spacing Example 1 Example 2 Example 3 Example 4 Example 5 Total rating 10 mm failure failure failure failure failure Delay lighting 9 mm success failure success failure failure Some success 8 mm success success success success success Instant light 7 mm success success success success success Instant light 6 mm success success success success success Instant light 5 mm success success success success success Instant light

[Table 2] summarizes the success or failure of the instantaneous lighting according to the electrode interval, the instantaneous lighting function can not be stably secured when the electrode interval is 9mm or more.

The present invention has the greatest feature in the combination of the components of the metal halide, in particular, it can be seen that the relationship as shown in the following Table 3 in the correlation between the Er content ratio and the shape of the light emitting tube 111.

[Table 3] below is a table comparing the total luminous flux (lumen) according to the shape of the light emitting material and the light emitting tube.

Light tube shape
(Long axis: shortening) Er  Total luminous flux according to the content ratio (% by weight) lumen ) Remarks
0% less than 0-10% 10-20% 20-30% 30-40% 14: 6 Failure Failure Failure Failure 7,200 13: 7 Failure Failure Failure 7,400 6,900 12: 8 Failure Failure 7,600 7,500 6,800 11: 9 6,500 6,200 5,900 5,750 5,400 10:10 6,100 5,800 5,600 5,400 5,100

Table 4 below is a table comparing efficiency (lm / W) according to light emitting materials and light emitting tube structures.

Light tube shape
(Long axis: shortening) Er  Total luminous flux according to the content ratio (% by weight) lumen ) Remarks
0% less than 0-10% 10-20% 20-30% 30-40% 14: 6 - - - - 97 13: 7 - - - 98 96 12: 8 - - 120 110 95 11: 9 50 50 48 46 45 10:10 49 48 46 44 41

As can be seen from the above [Table 1] to [Table 4], the high-brightness discharge lamp according to the present invention has a metal halide of 42% by weight of halides of Group 12 or 13, and 38 to 48% by weight of Na or Sc halides. And, the Er halide is composed of a mixture of 10 to 20% by weight, when the shape of the light emitting tube 111 is 12: 8 it can be seen that the highest consumption efficiency, the electrode interval is 6mm in order to extend the life as possible In order to maintain instantaneous lighting, the electrode spacing shall be maintained within the range of 8 mm under circular cross-sectional conditions of 3.8 to 4.2 mm in diameter.

As described so far, in the medium-type discharge lamp of 60 ~ 90W class, the components of the discharge lamp that can be instantaneously turned on, but the brightness efficiency compared to the power consumption is summarized as follows [Table 5]. Table 5 is a table comparing the efficiency of the lamp according to the invention and a conventionally known lamp.

Lamp type Power Consumption (W) Light quantity (Lm) Efficiency (Lm / W) Color rendering (Ra) Life expectancy (Hrs) Invention 60 7,200 120 85 5,000-8,000 Mercury lamp 250 10,500 42 60 8,000-11,000 Sodium 150 13,000 86 90 8,000-11,000 Metal 175 12,000 68 65 8,000-11,000 Halogen lamp 575 14,000 24 95 300-500 Incandescent light bulb 150 2,100 14 85 600-800 Fluorescent lamp 50 2,500 50 60 2,000-2,500 LED 150 7,000 46 90 Around 20,000

In particular, when the light emitting tube structure maintains 12: 8 and the weight mixing ratio of the Er compound is 20% or more, light efficiency of about 28% or more higher than that of other light emitting bodies can be obtained.

On the basis of the high-efficiency instantaneous lighting double-ended discharge lamp according to the embodiment, the life, total luminous flux, whether instantaneous lighting is possible, etc. are presented.

The specifications of the high brightness discharge lamp according to the present invention described so far are summarized in the following [Table 6].

Component Detailed condition Power Consumption 60 W
Electric tube Material: Quartz Glass
Shape: rectangle ellipsoid
Long axis (l) length: 11 ~ 13 mm
Single axis (w) length: 7 ~ 9 mm
electrode Material: Tungsten
Length: 6-8 mm
Diameter: 3.8 ~ 4.2 mm
Section Shape: Round Electrode thickness 5.5-7mm Gas pressure 4 atmospheres or less Emitting material A mixture of 42% by weight of halides of Group 12 or 13, 38-48% by weight of Na or Sc halides, and 10-20% by weight of Er halides

In the above description of the present invention, a high-efficiency instantaneous 60-90 W class double-ended discharge lamp having a specific structure and specifications is mainly described through the accompanying drawings, examples, and experimental examples. Not only can be applied to the discharge lamp of the double-ended type, or can be applied to the discharge lamp of the single-ended type, various modifications and variations are possible by those skilled in the art, and such variations and modifications should be interpreted as falling within the protection scope of the present invention. do.

111: discharge tube 112: electrode
114: getter 113: molybdenum foil
116: conductor 119: molybdenum conductor
117: exhaust port 122: ceramic base
123: glass enclosure

Claims (3)

delete A glass encapsulation body 123 in which a low pressure gas is filled in an airtight state therein; A discharge tube 111 disposed inside the glass encapsulation body and provided with a pair of electrodes 112 spaced at predetermined intervals, and filled with a light emitting material; A getter 114 for maintaining gas purity inside the glass encapsulation body; A conductor 116 for applying an external voltage to each electrode of the discharge tube; A ceramic base (122) for sealing an open end of the glass encapsulation to prevent leakage of gas; In the high brightness discharge lamp which is provided inside the ceramic base, the molybdenum conductor 119 to apply a voltage to the conductor 116 while maintaining the airtightness of the glass encapsulation body,
The high brightness discharge lamp has a power consumption of 60 ~ 90W,
The light emitting material is composed of 42% by weight of halides of Group 12 or 13, 38 to 48% by weight of Na or Sc halides, and 10 to 20% by weight of Er halides.
The pair of electrodes 112 is a circular cross-section having a diameter of 3.8 to 4.2 mm, the interval between the two electrodes is made of 6 ~ 8mm,
The discharge tube has a high brightness discharge lamp, characterized in that the length ratio of the major axis and minor axis is 12: 8.
The method of claim 2, wherein.
The conductor 116 is a high-brightness discharge lamp, characterized in that it comprises a curved bridge (116a) for absorbing the amount of stretching of the conductor in order to prevent a decrease in life due to thermal expansion of the conductor.

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