High-voltage discharge lamp and its manufacture

A high-pressure discharge lamp and manufacturing method technology, applied in the manufacture of discharge tubes/lamps, discharge lamps, gas discharge lamps, etc., can solve the problems of different thermal expansion coefficients, insufficient bonding force, etc., to prevent cracks, increase bonding force, The effect of suppressing cracking
CN1407597AInactive Publication Date: 2003-04-02PANASONIC CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
PANASONIC CORP
Publication Date
2003-04-02
Estimated Expiration
Not applicable · inactive patent

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Abstract

A high pressure discharge lamp includes a vessel made mainly of quartz including a luminous portion and side tube portions extending from both sides of the luminous portion; mercury enclosed in the luminous portion; a metal foil buried in each of the side tube portion; and an electrode rod, one end of which is connected to the metal foil and the other of which is extending to the luminous portion. The electrode rod has a surface area increase structure for increasing a surface area in at least a part of a portion buried in the side tube portion. A sealing portion glass containing at least one metal material selected from the group consisting of metals and metal oxides thereof is provided in a portion of the side tube portion including at least a part of the metal foil, a connection portion between the metal foil and the electrode rod and a part of the surface area increase structure.
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Description

technical field

[0001] The invention relates to a high-pressure discharge lamp and a method for its manufacture. Background technique

[0002] As systems become smaller, high-pressure discharge lamps used in combination with light sources for liquid crystal projectors and reflectors are expected to be smaller in size and higher in brightness.

[0003] In order to realize a lamp with small size and high brightness, it must be designed with a shorter arc length. However, when the arc length is shortened, in order to obtain a light source with the same brightness as before, the pressure of the substance enclosed in the lamp must be increased because the lamp current is limited by the electrodes. That is, it is desirable for the lamp to withstand high operating pressures. In particular, it is expected that the characteristics will be dramatically improved compared with the existing technology, and it will be able to withstand ultra-high working pressure of 30 MPa or more. [...

Claims

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