Production method of discharge lamp
A manufacturing method and discharge lamp technology, applied in the manufacture of discharge tubes/lamps, discharge lamps, gas discharge lamps, etc., capable of solving the problems of reduced processing efficiency at the front end of electrodes and loss of laser energy, etc.
Inactive Publication Date: 2006-04-12
PANASONIC CORP
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Problems solved by technology
[0005] However, according to the research conducted by the inventors of the present application with the main purpose of yield as the main purpose, it is known that after the first laser irradiation to melt and cut the fusing part, the tip of the electrode should be melted again, and the laser is irradiated from the outside of the arc tube again. , the energy loss of the laser will occur, and the efficiency of the processing of the electrode tip due to laser irradiation will also decrease.
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[0021] Next, an embodiment of a method for manufacturing a discharge lamp according to the present invention will be described with reference to the drawings. Figure 1~3 It is an explanatory drawing of the manufacturing method of the high-pressure mercury lamp which is an example of the manufacturing method of the discharge lamp which concerns on embodiment of this invention.
[0022] In this embodiment, first prepare as figure 1 A glass electric bulb for a discharge lamp (hereinafter referred to as "glass electric bulb") 50 shown in , and an electrode assembly 40 including an electrode structure part 42 forming a pair of electrodes of a discharge lamp, insert the electrode assembly 40 into the glass electric bulb within 50.
[0023] The glass light bulb 50 has a substantially spherical arc tube portion 10 serving as an arc tube of a discharge lamp, and a side tube portion 22 extending from the arc tube portion 10 . A part of the side pipe part 22 becomes a part of the disc...
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A method of producing a discharge lamp capable of preventing the energy loss of a laser emitted from the outside of a luminous tube when a pair of electrodes are formed by heating and fusing the specified fusion portion of a tungsten bar disposed in a sealed luminous space. Even if the temperature of an arc tube (10) is raised and luminescent substance (e.g., mercury) is evaporated to form a film of the luminescent substance on the inner wall of the luminous tube when a laser (60) is irradiated once from the outside of the luminous tube (10), the method of producing a discharge lamp heats the luminous tube (10) with a coil heater (125) to evaporate and remove the formed film, and then irradiates a laser (60) again.
Description
technical field [0001] The present invention relates to a method of manufacturing a discharge lamp, in particular to a method of manufacturing a short-arc type discharge lamp which shortens the distance between electrodes in order to approach a point light source. Background technique [0002] In recent years, various projectors that realize display on a large screen, such as liquid crystal projectors and DMD (Digital Micromirror Module) projectors, have been studied. As a light source for such a projector, discharge lamps such as a short-arc type high-pressure mercury lamp in which the distance between electrodes is shortened to, for example, 1 mm or less in order to be closer to a point light source are being paid attention to. [0003] As a method of manufacturing such a discharge lamp, for example, the method of manufacturing a discharge lamp disclosed in Japanese Patent No. 3330592 and Japanese Patent Application Laid-Open No. 7-45237 is used. One electrode assembly of...
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IPC IPC(8): H01J9/04H01J61/073H01J61/86
CPCH01J61/86H01J9/042H01J61/0732
Inventor 荻野雄一郎美浓吉满菊地昭夫上野浩信村濑隆幸
Owner PANASONIC CORP