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Manufacturing method of high-voltage discharge lamp, high-voltage discharge lamp and lamp assembly

A high-pressure discharge lamp and a manufacturing method technology, which are applied in the manufacture of discharge tubes/lamps, components of high-pressure discharge lamps and gas discharge lamps, etc., can solve the problem of increasing lamp current, increasing lamp voltage to a necessary level, and obtaining Less than and other problems, to achieve the effect of preventing breakage and reducing the starting voltage

Inactive Publication Date: 2004-08-04
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because, if the amount of mercury enclosed is insufficient relative to the power of the lamp, the voltage of the lamp cannot be increased to the necessary level, which will cause the current of the lamp to increase. As a result, the electrode evaporates in advance, resulting in less than practical lights
In other words, from the viewpoint of realizing a high-output lamp, it is sufficient to increase the power of the lamp and manufacture a short-arc lamp with a shorter electrode pitch than conventional lamps. However, actually manufacturing a high-output, For high-power lamps, it is necessary to increase the compressive strength and increase the amount of mercury enclosed
Under today's technology, there is no practical high-pressure discharge lamp with extremely high compressive strength (for example, above 30MPa)

Method used

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  • Manufacturing method of high-voltage discharge lamp, high-voltage discharge lamp and lamp assembly
  • Manufacturing method of high-voltage discharge lamp, high-voltage discharge lamp and lamp assembly
  • Manufacturing method of high-voltage discharge lamp, high-voltage discharge lamp and lamp assembly

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Effect test

Embodiment approach 1

[0087] refer to Figure 4 , the high-pressure discharge lamp according to Embodiment 1 of the present invention will be described. In the high-pressure discharge lamp of the present embodiment, a space (gap) 30 is formed at the boundary between the first glass portion 8 and the second glass portion 7 of the sealing portion 2 . This and image 3 The shown boundary between the first glass part 8 and the second glass part 7 is different for the high-pressure discharge lamp 100 which is joined continuously. The other points are basically the same as image 3 The structure shown is the same. Therefore, for the convenience of description, the symbol of the high-pressure discharge lamp in this embodiment is designated as "100", and the number is omitted or simplified. image 3 (or figure 1 ) represents the structure and repeated parts.

[0088] The lamp 100 of this embodiment is a double-ended lamp including two sealing parts 2 . Although the second glass part 7 is arranged s...

Embodiment approach 2

[0145] refer to Figure 8 A high-pressure discharge lamp according to Embodiment 2 of the present invention will be described. Figure 8 The structure of the high-pressure discharge lamp 200 of this embodiment is shown schematically. The point that the cavity 30 is sealed in the sealing portion 2 of the lamp 200 is the same as that of the high-pressure discharge lamp 100 of Embodiment 1 described above.

[0146] Such as Figure 8 As shown, in order to further improve the withstand voltage strength of the lamp 100 in this embodiment, it is preferable to Figure 8 Like the lamp 200 shown, a metal film (for example, a Pt film) 35 is formed on at least a part of the surface of the part of the electrode rod 3 buried in the sealing part 2 . Note that the metal film 35 may be formed of at least one metal selected from the element group consisting of Pt, Ir, Rh, Ru, and Re. For example, the metal film 35 may be a single layer composed of a Pt layer. From the viewpoint of attachme...

other Embodiment approach

[0161] In the above-described embodiments, a mercury lamp using mercury as a luminescent substance has been described as an example of a high-pressure discharge lamp. The present invention is also applicable to any high-pressure discharge lamp having a structure in which the airtightness of the arc tube is maintained by the sealing portion. For example, the present invention is also applicable to high-pressure discharge lamps such as metal halide lamps and xenon that seal metal halides. Because for metal halide lamps, etc., the higher the withstand voltage, the better. In other words, it is because by preventing air leakage and preventing cracks, a lamp with high reliability and long life can be obtained. When the structure described in the above-mentioned embodiment is applied to a metal halide lamp in which not only mercury but also metal halide is sealed, the following effects can be obtained. In other words, by providing a second glass part 7, the adhesion of the metal f...

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Abstract

Provided is a method of efficiently manufacturing a high-pressure discharge lamp with high pressure-resistance. The manufacturing method of the high-pressure discharge lamp includes a process of forming a sealing part (2) from side tube parts (2') of a glass pipe (80) for the discharge lamp. The process of forming the sealing part (2) includes a process of inserting a glass member (70), made of a glass having a softening point lower than that of the first glass forming the side tube parts (2'), and a process of heating the side tube parts (2') to adhere a front side part and a back side part (A, C) of the glass member (70) to form a cavity (30) between at least one part of the middle part (B) of the glass member and the side tube parts (2') on condition that a light-emitting tube part (1') side is designated as a front side and the glass member is divided into the front side part, the back side part, and the middle part, and a process of heating the part at least including the glass member (70) and the side tube parts (2') with a temperature higher than that of a distortion point temperature of the second glass.

Description

technical field [0001] The invention relates to a manufacturing method of a high-pressure discharge lamp, a high-pressure discharge lamp and a lamp assembly. In particular, it relates to a method of making high pressure discharge lamps for general lighting, for use in projectors in combination with reflectors, and for automobile headlights. Background technique [0002] In recent years, image projection devices such as liquid crystal projectors and DMD projectors have been widely used as systems for realizing large-screen images, and high-brightness high-pressure discharge lamps are generally used in such image projection devices. The structure of the existing high pressure discharge lamp 1000 is schematically shown in Figure 11 middle. For example, it is disclosed in Japanese patent publication No. 2-148561 Figure 11 The lamp 1000 shown is a so-called ultra-high pressure mercury lamp. [0003] The lamp 1000 includes a bulb 101 made of quartz glass, and a pair of seals 1...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J9/00H01J9/24H01J61/36H01J61/86H01K1/38
CPCH01K3/20H01J61/368H01K1/38H01J9/247H01J61/86
Inventor 堀内诚一番濑刚高桥清畑冈真一郎关智行茑谷恭
Owner PANASONIC CORP