Short arc type high voltage discharge lamp

Abstract

The invention provides a short arc type high pressure discharge lamp comprising a first metallic plate welded with the other end of the core wire which retains an electrode at one end thereof; a columnar body oppositely arranged with a tube-like body, separately by the first metallic plate; and a plurality of metallic foils contacted with the lateral surface of the columnar body and welded with the first metallic plate at one end; wherein, the first metallic plate is provided with a hole in the middle; the other end of the core wire is inserted into the hole; a welding portion welded with thecore wire is arranged along the circumference direction of the hole at one lateral surface of the first metallic plate and the circumference direction of the hole at the other lateral surface; a conductive element is arranged between the welding portions and between the inner side of the hole and the circumference of the core wire. When welding the core wire maintaining the electrode and the first metallic plate arranged on the core wire, the resistance will not become higher and not generate local heating even if the welding portion has cracks.

Description

technical field [0001] The invention relates to high pressure discharge lamps of the short arc type. More specifically, it relates to a short-arc high-pressure discharge lamp having a characteristic seal structure, such as a short-arc discharge lamp used as an ultraviolet light source in the manufacture of semiconductors or liquid crystals, or a xenon lamp used in projectors or stage lighting. Background technique [0002] It is known that short-arc discharge lamps are often used as ultraviolet light sources in manufacturing processes of semiconductors, liquid crystals, and the like. This short-arc discharge lamp is an ultraviolet light source in which mercury and a rare gas are sealed in a discharge space, and light emitted from mercury is utilized. On the other hand, xenon lamps used for projectors and stage lighting are short-arc high-pressure discharge lamps that enclose xenon gas at high pressure in the discharge space and emit strong light in the visible light region ...

AI Technical Summary

Problems solved by technology

In this way, a high current flows through the welded portions 114, 115 with high resistance, and the welded portions 114, 115 will locally generate heat, and the abnormally heated welded portions 114, 115 themselves will melt again, and the core wire 105 will dissipate from the welded portion. The problem that the metal plate 106 falls off

In addition, the surrounding areas of the welding parts 114 and 115 are also heated, and the vicious cycle of increasing the resistance is repeated, and the input power is consumed as heat.

Thus, for example, by performing constant power control on the power input to the short-arc high-pressure discharge lamp 100, the power used for light emission is reduced by the power consumed as heat. As a result, even if the same input power is used for lighting There will also be a problem of reduced illumination

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