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Lamp with reflector and Image projector

A technology of reflectors and high-pressure discharge lamps, which can be used in reflectors, projection devices, lighting devices, etc., and can solve problems such as unpredictable characteristics and working conditions

Inactive Publication Date: 2004-10-27
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] This kind of high-pressure mercury lamp with extremely high pressure resistance works with mercury vapor pressure that cannot be achieved by the existing technology, so its characteristics and working conditions cannot be predicted.

Method used

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  • Lamp with reflector and Image projector
  • Lamp with reflector and Image projector
  • Lamp with reflector and Image projector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0091] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Figure 6 The cross-sectional structure of the reflector-equipped lamp 500 of this embodiment is shown. Moreover, in order to make the drawing easier to see, the shading of the cross section is omitted.

[0092] Figure 6 The shown reflector lamp 500 has a high-pressure discharge lamp 100 and a reflector 50 that reflects light emitted from the lamp 100.

[0093] The reflector 50 has a first opening (wide opening) 51 forward in the emission direction 70, and the light of the reflector lamp 500 is emitted from the first opening 51. In addition, at the rear of the reflecting mirror 50 (the rear of the emission direction 70), when viewed from the front, there is a neck 59 at the center. A second opening portion (narrow opening portion) 52 is formed in the neck portion 59. By inserting the sealing portion 2 into the second opening portion 52, the lamp 100 and the reflector 50 are...

Embodiment approach 2

[0122] Next, referring to Fig. 9, the second embodiment of the present invention will be described. The configuration of this embodiment is a modification of the configuration of the first embodiment described above, and the mechanism for reducing the temperature difference between the upper portion 1a and the lower portion 1b of the arc tube 1 by the wind 71 is the same as that of the first embodiment described above.

[0123] In the lamp 600 with a reflector shown in FIG. 9, a channel 80 that can vent air to the inside is connected to the air blowing port 55, and a part of the channel 80 is also formed integrally with the lamp 600 with a reflector. When the air 71' is sent into the channel 80 from the outside, the air passing through the channel 80 passes through the air supply opening 55 and becomes wind 71, which is sent to the inner surface (50a) of the reflector 50. Then, the warm air at the upper part is combined with the air The warm air and the cold lower air mix well, el...

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Abstract

A lamp with a reflector comprises a high pressure discharge lamp and a reflector. The reflector has a first opening and a second opening. Clearance between a sealing portion of the high pressure discharge lamp and the second opening is substantially filled. The sealing portion includes a first glass portion extending from a luminous bulb and a second glass portion provided in the inside of the first glass portion, and the sealing portion has a portion to which a compressive stress is applied. Moreover, when the sealing portion is disposed to extend in a substantially horizontal direction, a portion of the reflector is formed with an air inlet for introducing an air flow striking against an upper portion of the luminous bulb and then coming into a lower portion of the luminous bulb.

Description

Technical field [0001] The invention relates to a lamp with a reflector and an image projection device. In particular, it relates to a high-pressure mercury lamp used as a light source of a projector or the like in which the amount of enclosed mercury is relatively large. Background technique [0002] In recent years, as a system for realizing large-screen images, image projection devices such as liquid crystal projectors or DMD projectors have been widely used. In such an image projection device, a high-pressure mercury lamp as disclosed in Japanese Patent Laid-Open No. 2-148561 is generally widely used. [0003] figure 1 It shows the structure of a high-pressure mercury lamp disclosed in JP 2-148561 A. figure 1 The lamp 1000 shown is composed of an arc tube 1 containing quartz as a main component and a pair of side tube portions (sealing portions) 2 extending on both sides of the arc tube 1. In the side tube portion 2, a metal electrode structure is embedded so that electric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S6/00F21V29/00F21V29/02F21V29/505G02F1/13357G03B21/00H01J5/16H01J5/48H01J9/32H01J61/00H01J61/073H01J61/12H01J61/20H01J61/30H01J61/36H01J61/52H01J61/82H01J61/86H01K1/26H01K1/30
CPCF21V29/02F21V29/006F21V29/83H01J61/302H01J61/52F21V29/86F21V29/262F21V29/004H01J61/86H01J61/20H01J61/368F21V29/713F21V29/242H01J61/12F21V29/2293H01J61/0732H01J9/323F21V29/51F21V29/60
Inventor 堀内诚高桥清畑冈真一郎一番濑刚关智行茑谷恭
Owner PANASONIC CORP