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Short arc type discharge lamp

A discharge lamp and short-arc technology, applied to discharge lamps, gas discharge lamps, parts of gas discharge lamps, etc., can solve problems such as life deterioration and achieve the effect of inhibiting blackening

Pending Publication Date: 2020-02-21
USHIO DENKI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in recent years, in the pursuit of higher output and longer life of the lamp, it has been found that crater-shaped depressions are formed between the coils in such a shape wrapped with coils, thereby causing the lamp to black out. The progression of aging has become one of the reasons for the deterioration of life expectancy

Method used

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Examples

Experimental program
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Embodiment Construction

[0036] figure 1 (A) is a side view of the electrodes used in the short-arc discharge lamp of the present invention, figure 1 (B) is another example of an electrode having a different shape of the electrode main body.

[0037] exist figure 1 In (A), the electrode 3 is composed of an electrode core wire 4 and a thick-diameter electrode body part 5 formed at the tip of the electrode core wire 4, and a ring-shaped member is provided so as to surround the electrode body part 5. 10. The annular member 10 is composed of a tungsten wire rod, is a single-layer ring-shaped member, and has a substantially circular cross-sectional shape. Here, substantially circular includes not only circular shapes but also elliptical shapes.

[0038] figure 1 (B) is an example in which the shape of the electrode main body part 5 is different. In this example, the diameter-expanded part 5 a is further provided on the front end side of the electrode main body part 5 . The electrode structure des...

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PUM

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Abstract

Provided is a lamp structure capable of avoiding blackening of a light-emitting tube due to evaporation of a coil serving as a starting member without deteriorating startability of a short-arc discharge lamp provided with a pair of electrodes disposed in a mutual separated and opposite manner in the light-emitting tube. The discharge lamp is characterized in that the electrode is composed of an electrode core wire and a large-diameter electrode main body part formed at the front end of the electrode core wire, and a single-layer annular component is arranged in a manner of surrounding the periphery of the electrode main body part.

Description

technical field [0001] The present invention relates to a projection type projector device, a short-arc discharge lamp for projectors, etc., and particularly relates to a short-arc discharge lamp having an electrode provided with a starting member. Background technique [0002] Currently, as a short-arc discharge lamp for the above-mentioned application, a short-arc discharge lamp in which a rare gas such as mercury or xenon is sealed in an arc tube is used. [0003] Its structure is as Figure 5 As shown, a short-arc discharge lamp 1 is provided with a pair of electrodes 3, 3 disposed opposite to each other in a luminous tube 2. In this luminous tube 2, a halogen is sealed in addition to mercury and a rare gas. Halogen circulation is used to suppress blackening in the luminous tube 1 . [0004] In addition, in such a short-arc discharge lamp, a structure in which a coil is wound around an electrode as a starting member for improving starting performance is known. For exam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J61/04H01J61/02H01J61/06
CPCH01J61/04H01J61/02H01J61/0672H01J61/0732
Inventor 阪浩介寺田庄一
Owner USHIO DENKI KK