COMPOSITE LIGHT EMITTING TUBE CONTAINER

Title:

COMPOSITE LIGHT EMITTING TUBE CONTAINER

Document Type and Number:

WIPO Patent Application WO/2008/123626

Kind Code:

A1

Abstract:

A polycrystalline alumina light emitting tube member (3) includes a hollow polycrystalline alumina capillary (1) and at least one transparent monocrystal alumina disc (2). The polycrystalline alumina light emitting tube member (3) has a function as the light emitting portion of a high-brightness discharge lamp, so that the light irradiated from the polycrystalline alumina light emitting tube member (3) is irradiated to the outside through the transparent monocrystal alumina disc. The light emitted through a transparent window is hardly lost by a scatter so that the lamp efficiency can be improved. The light emitted through the transparent monocrystal alumina has a size equivalent to the distance between the electrodes, so that it can be utilized as a point light source. As a result, this light source can be optically controlled in combination with a reflecting mirror or a lens so that it can be applied to not only an ordinary illumination but also a light emitting tube (or burner) for an automotive headlight or a projector lamp.

Inventors:

WATANABE KEIICHIRO (JP)

Application Number:

PCT/JP2008/056963

Publication Date:

October 16, 2008

Filing Date:

April 02, 2008

Export Citation:

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Assignee:

NGK INSULATORS LTD (JP)
WATANABE KEIICHIRO (JP)

International Classes:

H01J61/30; H01J61/32; H01J61/33

Domestic Patent References:

WO2005122214A1

2005-12-22

Foreign References:

JP2003157798A	2003-05-30
JPH0750151A	1995-02-21
JPH08138628A	1996-05-31
JP2007081131A	2007-03-29
JPH01182801A	1989-07-20
JPH08501270A	1996-02-13
US3026210A	1962-03-20
JPH07165485A	1995-06-27
JP2001519969A	2001-10-23
JP2003157798A	2003-05-30
JPH0264603A	1990-03-05
JPH07165485A	1995-06-27

Other References: