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Lamp device, manufacturing method for same and projector having a lamp device

A manufacturing method and one-party technology, applied to the components of lighting devices, projection devices, lighting devices, etc., can solve the problems of increasing quantity and increasing product cost

Active Publication Date: 2005-08-17
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, attaching a metal cover to the rear end of the sealing portion or providing a light shield on the cover housing the lamp unit increases the number of parts or requires the preparation of molds for these parts, resulting in an increase in product cost

Method used

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  • Lamp device, manufacturing method for same and projector having a lamp device
  • Lamp device, manufacturing method for same and projector having a lamp device
  • Lamp device, manufacturing method for same and projector having a lamp device

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Embodiment Construction

[0036] Hereinafter, a lamp device, a manufacturing method thereof, and a projector having the lamp device according to embodiments of the present invention will be described with reference to various drawings. In addition, the same symbols are assigned to the same parts in the respective drawings, and a part of the description is omitted.

[0037] The structure of the lamp device.

[0038] figure 1 It is a cross-sectional view showing the structure of the lamp device 1 of the embodiment of the present invention. The lamp device 1 has a luminous tube 10 and a reflector 20. The arc tube 10 is, for example, a high-pressure mercury lamp, formed of quartz glass or the like, and has a central spherical portion 11 and a pair of sealing portions 13a and 13b formed continuously from the spherical portion 11 on both sides of the spherical portion 11. Inside the spherical portion 11, mercury, rare gas, a small amount of halogen, etc. are enclosed, and electrodes 12a and 12b made of tungste...

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PUM

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Abstract

A lamp device and a projector having the lamp device eliminated of light leaking in a direction opposite to a reflecting direction at a rear end of an encapsulation fixing an arc tube on a reflection mirror is simply and inexpensively provided. An arc tube and a reflection mirror are provided. The arc tube has encapsulations one of which is inserted in a cylinder of the reflection mirror thereby securing the encapsulation and the cylinder together by an adhesive. The bulb of the arc tube and the other encapsulation are positioned on a side close to a reflection surface of the reflection mirror. The encapsulation inserted in the cylinder and positioned on a side opposite to the reflection surface has an end at least at an end face of which is covered with the adhesive thereby providing light shield.

Description

[0001] Technical area [0002] The present invention relates to a lamp device and a projector formed by fixing a light emitting tube on a reflector. Background technique [0003] The lamp device is formed by inserting one of the sealing parts of the luminous tube having the light-emitting part and a pair of sealing parts supporting the light-emitting part into the cylindrical part of the central part of the reflecting mirror having the curved reflecting surface and being bonded and fixed to form the lamp device. It is widely known (for example, Patent Document 1). In such a lamp device, the light from the light-emitting part is reflected by the reflective surface and travels forward of the reflective surface for use. However, there is a problem in that light leaks from the rear end of the sealing portion fixed to the cylindrical portion of the reflector in the direction opposite to the reflection direction, thereby deteriorating components arranged on the rear side of the lamp devi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/14F21K2/00F21S2/00F21V19/00F21Y101/00G03B21/20H01J61/86H04N5/74
CPCG03B21/2026
Inventor 藤泽尚平小林弘幸寺岛亨田中和裕竹泽武士町田友信高户雄二
Owner SEIKO EPSON CORP