CN202058694U

CN202058694U - UHP metal halide mercury lamp

Info

Publication number: CN202058694U
Application number: CN2011200676923U
Authority: CN
Inventors: 吴喜荣
Original assignee: SHANGHAI HAOYE OPTOELECTRONICS TECHNOLOGY Co Ltd
Current assignee: SHANGHAI HAOYE OPTOELECTRONICS TECHNOLOGY Co Ltd
Priority date: 2011-03-15
Filing date: 2011-03-15
Publication date: 2011-11-30
Anticipated expiration: 2021-03-15

Abstract

The utility model discloses an UHP (Ultra High Pressure) metal halide mercury lamp, which comprises a lamp body and electrodes, wherein a lamp cavity is formed at the interior of the lamp body; the electrodes extend to the interior of the lamp cavity; metal halide is filled in the lamp cavity; electrode heads adopt high-density conical pointed heads generated by tungsten via adopting an argon-arc welding method; the spacing between the two electrodes is 0.1-3mm; the density of the electrode heads is 19.00-21.03g/cm3; and the taper of the conical pointed heads is 1-45DEG, and the length of the conical pointed heads is 0.1-0.7mm. In the UHP mercury lamp provided by the utility model, the metal halide is filled in the lamp cavity, the electrode heads are designed into the conical pointed heads to form point discharge, so that red light spectrum and blue light spectrum are both enhanced, and three primary colors such as red, blue and green are tend to be more balanced; light colors are improved; the brightness and the light efficiency are improved; and the problem that a lamp explodes under the UHP can be effectively avoided.

Description

Superhigh pressure gold halogen mercury lamp

Technical field

The utility model relates to a kind of superhigh pressure gold halogen mercury lamp, relates in particular to a kind of short fox ultrahigh pressure mercury lamp of the third generation that is applicable to high definition projectors, belongs to gas reflecting lamp technical field.

Background technology

Along with the appearance that is used for the little diagonal LCD panel of the high definition of media projection device, make small-sized, light, high brightness, utilize the third generation ultrahigh pressure mercury lamp of the short fox of ultra high pressure mercury steam (1MPa or more than) discharge to come into the market.Ultrahigh pressure mercury lamp is mainly used in light reflection or other optical imaging systems, use the superelevation mercury lamp as light source such as projector, its primary structure is that two sparking electrodes are set in discharge tube, electrode is electrically connected with lead-out wire by the sealing-in molybdenum sheet, the inert gas argon or the xenon that are filled with mercury in the discharge tube and are used on a small quantity help start, ultrahigh pressure mercury lamp is contained in the focal position of the parabolic reflector or the ellipsoid reflecting surface of reflective optical system, can forms the higher source luminance of a monolithic devices.When this light source is used for multimedia projector, liquid crystal rear projection display system, DLP digital light transmission and goes out shadow casting technique such as the projector field of system, the requirement of ultrahigh pressure mercury lamp is that interpolar discharge electric arc is short, brightness is high, colour temperature is high, the balance of enriching red, green, blue primitive color light and brightness between them is arranged in the light beam.

The common problem of this class ultrahigh pressure mercury lamp is: primaries brightness imbalance, because only under very high mercury vapor pressure (20MPa), red spectrum just can reach certain proportion, satisfy qualified color effect, but fluorescent tube will be with purity at 99.99% high purity quartz pipe, pressure height not only in the fluorescent tube, temperature also high (nearly 1000 ° of C) is added starting resistor and is also reached 2500 volts of useful lifes that all directly influence mercury lamp.Therefore the shortcoming of existing product can be summarized as: desire to reach the balance of primary colors or utilize filter to suppress blue and green light, sacrificing luminance, the raising steam pressure, strengthen selection and manufacture difficulty, increase cost or reduction life-span, the life-span of more present import ultrahigh pressure mercury lamps, generally about 2000 hours, price was more than 1000 yuans.

Summary of the invention

Technical problem to be solved in the utility model provides long superhigh pressure gold halogen mercury lamp of a kind of light efficiency height, photochromic balance and life-span.

The utility model is to solve the problems of the technologies described above the technical scheme that adopts to provide a kind of superhigh pressure gold halogen mercury lamp, comprises lamp body and electrode; The inner lamp chamber that forms of described lamp body; Described electrode extends into inside, described lamp chamber, and electrode comprises electrode tip and is wound with the electrode stem of high density tungsten filament, and inside, described lamp chamber is filled with metal halide; Wherein: described electrode tip is the highdensity conical tip that tungsten adopts the method for argon arc welding to generate.

Above-mentioned superhigh pressure gold halogen mercury lamp, wherein, described electrode is two, its electrode spacing is 0.1～3mm; Described electrode tip density 19.00～21.03g/cm3, described conical tip tapering is 1 °～45 °, length is 0.1～0.7 mm.

Above-mentioned superhigh pressure gold halogen mercury lamp, wherein, described electrode is made less than the pure tungsten of 8ppm by impurity content.

The utility model contrast prior art has following beneficial effect: the superhigh pressure gold halogen mercury lamp that the utility model provides, by in the lamp chamber, adding metal halide, electrode tip be set be the discharge that tapers off to a point of conical tip, can under very not high mercury vapor pressure, increase red-light spectrum, and reinforcement blue streak spectrum, make red, blue, green three primary colors more tend to balance, thereby improve photochromic, improve brightness and light efficiency and can not need to light and adopt under the high pressure too special electrode to reduce erosion fluorescent tube, thereby avoid fried lamp problem under the superhigh pressure, reach 4000 hours service time, starting resistor is than low many of existing mercury lamp voltage (2500 volts), have only 1000 volts, price is below 500 yuan.

Description of drawings

Fig. 1 is the utility model superhigh pressure gold halogen mercury lamp structural representation;

Fig. 2 is the spectral distribution graph of prior art superhigh pressure Metal halogen lamp;

Fig. 3 is the spectral distribution graph of the utility model superhigh pressure gold halogen mercury lamp.

Among the figure:

1 lamp body, 2 electrodes, 3 lamp chambeies

21 electrode tips, 22 electrode stems, 23 tungsten filaments

Embodiment

The utility model will be further described below in conjunction with drawings and Examples.

Fig. 1 is the utility model superhigh pressure Metal halogen lamp structural representation.

See also Fig. 1, the superhigh pressure gold halogen mercury lamp that the utility model provides comprises, comprises lamp body 1 and electrode 2; The inner lamp chamber 3 that forms of described lamp body; Described electrode 2 extends into 3 inside, described lamp chamber, described electrode 2 comprises electrode tip 21 and electrode stem 22, be wound with tungsten filament 23 on the described

electrode stem

22,3 inside, described lamp chamber are filled with the halide of mercury, mercury, and one of gallium halide, lithium halide, zinc halide, dysprosium halide, scandium halide or their composition; The highdensity conical tip that described electrode tip 21 adopts the method for argon arc welding to generate for tungsten.

The superhigh pressure gold halogen mercury lamp that the utility model provides can increase red-light spectrum, and strengthens blue streak spectrum, thereby red, blue, green three primary colors are more tended to balance.Simultaneously, colour temperature of the present utility model reaches more than the 6000K, and the electric arc hot spot is 1～1.8mm, and its brightness is higher than more than the prior art ultrahigh pressure mercury lamp brightness 30Kpa.

The utility model in normal operation, lamp chamber 3 internal work temperature can reach 900～950 ℃, the mercury-vapor pressure that has guaranteed 3 inside, lamp chamber can reach the atmospheric pressure about 200, the electric potential gradient of 2 discharge plasmas of electrode reaches 60V/mm, and then excite the halide discharge of gallium and indium, make pure high-pressure mercury increase by the red-light spectrum of 660～680nm, and strengthened the blue streak spectrum of 400～440nm, thereby make red, blue, green three primary colors more tend to balance, simultaneously, colour temperature of the present utility model reaches more than the 6000K, and the electric arc hot spot is 1～1.8mm, and its brightness is higher than more than the prior art ultrahigh pressure mercury lamp brightness 30Kpa.

Fig. 2 is a prior art superhigh pressure Metal halogen lamp spectral distribution graph, and Fig. 3 is the spectral distribution graph of a kind of embodiment of the utility model.Comparison diagram 2, Fig. 3 are as can be seen, the superhigh pressure gold halogen mercury lamp that the utility model provides has increased by the red-light spectrum of 660～680nm than prior art ultrahigh pressure mercury lamp, the blue streak spectrum of 400～440nm is also strengthened to some extent, make red, blue, green three primary colors more tend to balance, thereby improve photochromicly, improve brightness.

Different with general mercury lamp, superhigh pressure gold halogen mercury lamp air pressure can reach 200 bar, 1 crust (bar)=100,000 handkerchiefs (Pa)=10 newton/square centimeter=0.1Mpa, thus obtain very strong continuous visible radiation.This class bulb, owing to will make a light source that is operated under the 200 bar pressure, the maximum temperature of quartzy tube wall can not surpass its saturating temperature of light, in fact can allow to use in a narrow and small temperature range, therefore the ultrahigh pressure mercury lamp manufacture difficulty is than higher, and color balance is poor, and is easy to fried lamp.

Photochromic in order further to improve, improve brightness and light efficiency, find by a large amount of experiments, in lamp chamber 3, fill mercury, mercury halide, gallium halide, the halid composition of indium halide and zinc, and the content that mercury is set is 0.23-0.42 ㎎/mm3, mercury halide content is: 0.00081-0.032 ㎎/mm3, the halide content of gallium is 0.00005-0.085 ㎎/mm3, the halid content of indium is 0.0000628～0.00963mg/mm3, the halide content of zinc is 0.00005-0.00925 ㎎/mm3, after adding above-mentioned combination halide, the interior operating air pressure of lamp is adjusted to the 100-200bar pressure range and just can be reached desirable color balance, brightness reaches 65-70 lm/w, has well solved the problem of easily fried lamp under the hyperbar operating state.

Along with halid adding, increased invasion and attack to tube wall and electrode, under superhigh pressure, may cause fried lamp problem, electrode tip 21 of the present utility model is preferably the highdensity conical tip that tungsten adopts the method generation of argon arc welding.Described electrode is two, and its electrode spacing is 0.1～3mm; Density 19.00～21.03 g/cm3 of described electrode tip 21, described conical tip tapering is 1 °～45 °, length is 0.1～0.7mm.Described electrode 2 preferably also claims ppm by impurity content less than 8ppm() pure tungsten make.By improving the density of electrode tip 21, reduce invasion and attack to electrode, because being conical tip, two electrode tips 21 taper off to a point after the discharge, reduced the temperature of tube wall, therefore, also greatly reduce the invasion and attack of halide, thereby avoid fried lamp problem under the superhigh pressure tube wall.

Though the utility model discloses as above with preferred embodiment; right its is not in order to limit the utility model; any those skilled in the art; in not breaking away from spirit and scope of the present utility model; when doing a little modification and perfect, therefore protection range of the present utility model is worked as with being as the criterion that claims were defined.

Claims

1. a superhigh pressure gold halogen mercury lamp comprises lamp body (1) and electrode (2); The inner lamp chamber (3) that forms of described lamp body (1); Described electrode (2) extends into inside, described lamp chamber (3), and electrode (2) comprises electrode tip (21) and is wound with the electrode stem (22) of tungsten filament (23), and inside, described lamp chamber (3) is filled with metal halide; It is characterized in that: the highdensity conical tip that described electrode tip (21) adopts the method for argon arc welding to generate for tungsten.

2. superhigh pressure gold halogen mercury lamp according to claim 1 is characterized in that described electrode (2) is two, and its electrode spacing is 0.1～3mm; Described electrode tip (21) density 19.00～21.03g/cm3, described conical tip tapering is 1 °～45 °, length is 0.1～0.7 mm.