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Extra-high pressure discharge lamp

A discharge lamp and ultra-high voltage technology, applied in the direction of high-pressure discharge lamps, discharge lamps, gas discharge lamps, etc., can solve problems such as electrode bending, and achieve the effect of inhibiting deformation and inhibiting electrode bending

Inactive Publication Date: 2013-03-13
USHIO DENKI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, even if there is no problem during manufacture or transportation of the ultrahigh pressure discharge lamp, there is a problem that the electrode is bent at the boundary between the electrode and the shaft after the ultrahigh pressure discharge lamp is turned on for hundreds of hours.

Method used

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  • Extra-high pressure discharge lamp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] As a first embodiment, figure 1It is a schematic diagram of the ultra-high pressure discharge lamp of the present invention. figure 1 -a) is a schematic diagram of the ultra-high pressure discharge lamp 10, including: for example, a light-emitting part 11 made of a light-transmitting material such as quartz, a sealing part 12 connected to the light-emitting part 11, and an opposing arrangement in the light-emitting part 11 A pair of electrodes 1 . And, one end of the electrode 1 is buried in the sealing portion 12 and welded to the metal foil 13 . The other end of the metal foil 13 is welded to an external lead 14 and protrudes from the sealing portion 12 to the outside.

[0032] And, the light-emitting part is sealed with 0.15mg / mm 3 The above-mentioned mercury and, for example, a rare gas of 13 KPa as a discharge gas, specifically, Ar. In addition, the distance (inter-electrode distance) between the electrodes 1 arranged facing each other is, for example, 2 mm b...

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PUM

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Abstract

An extra-high pressure discharge lamp, comprises an optical transparent light emitting section, sealing sections connected to the light emitting section, a pair of electrodes which face each other in the light emitting section, wherein one of the electrodes having a thick portion, a thin portion and an intermediate portion which is formed between the thick portion and the thin portion, wherein 0.15 mg / mm3 of mercury is enclosed in the light emitting portion, and wherein the number of crystal grains which exist on a cross section perpendicular to an axis of the one of the electrodes is three.

Description

technical field [0001] The present invention relates to an ultra-high pressure discharge lamp used in a projection device such as a liquid crystal display device, a DLP (Digital Light Processor) using a DMD (Digital Micromirror Device), and the like. Especially related to a kind of 0.15mg / mm sealed inside the luminous tube 3 The above mercury ultra-high pressure discharge lamp is characterized by the crystal grains of the electrodes arranged inside the arc tube. Background technique [0002] Conventionally, an ultra-high pressure mercury lamp has been widely used as a light source of a projection device. In recent years, the miniaturization of such projection devices has progressed, and types that can be easily carried and moved have become popular. Such a miniaturized projection device requires a light source that is bright enough to see an image even in daylight and can be used. Against this background, studies have been conducted to further reduce the size and increase...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J61/073H01J61/20
CPCH01J61/86H01J61/0735
Inventor 山下高史后藤一浩吉田和弘堀川范子
Owner USHIO DENKI KK