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High-pressure mercury lamp, lamp unit, and image display apparatus

A high-pressure mercury lamp, mercury technology, applied in discharge lamps, electrical components, gas discharge lamps, etc.

Inactive Publication Date: 2008-01-16
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the impact of the above-mentioned Japanese published patent technology is not enough to prevent the base discharge from occurring, and the base discharge becomes the main discharge after a period of time

Method used

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  • High-pressure mercury lamp, lamp unit, and image display apparatus
  • High-pressure mercury lamp, lamp unit, and image display apparatus
  • High-pressure mercury lamp, lamp unit, and image display apparatus

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Embodiment 1 of the present invention relating to a lamp unit using a high-pressure mercury lamp will be described below with reference to the drawings.

[0037] 1. Lamp unit structure

[0038] Fig. 1 is a perspective view of the lamp unit of the present embodiment.

[0039] As shown in FIG. 1 , the lamp unit 1 includes a high-pressure mercury lamp (hereinafter simply referred to as “lamp”) 3 and a reflection mirror 5 . The lamp 3 is provided in the reflector 5 . Reflecting mirror 5 includes reflective member 7 and glass member 9 .

[0040] Fig. 2 is a plan view of the lamp unit with the reflector partially cut away to show an internal view of the lamp.

[0041] As shown in FIG. 2, the lamp 3 includes a discharge tube 23 and electrode assemblies 25a and 25b. The discharge tube 23 includes a main pipe portion (corresponding to “main body” in the claims) 15 in which a discharge space 13 is provided, and sealing portions 17 and 19 provided on opposite sides of the main...

Embodiment 2

[0081] A front projection type image display apparatus (hereinafter referred to as "liquid crystal projector") using the lamp unit of Embodiment 1 is described below with reference to the drawings.

[0082] 5 is a sectional perspective view of a liquid crystal projector of Embodiment 2. FIG.

[0083] As shown in FIG. 5, the liquid crystal projector 200 includes: a lamp unit 1 including a lamp 3; a power supply unit 202 including an electronic ballast for lighting the lamp 3; a control unit 204; a lens unit 206 in which a converging lens is embedded , a translucent color liquid crystal projection display panel and a driving motor; a fan unit 208 for cooling; and a container 210 for accommodating these components. It should be noted that the lens unit 206 is configured such that a part protrudes out of the container 210 .

[0084]The power supply unit 202 generates a predetermined DC voltage from a 100V household AC power supply, and supplies the generated DC voltage to the ele...

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Abstract

A high-pressure mercury lamp including electrode assemblies and a discharge vessel (23) that is composed of: a main tube part (15) having a discharge space (13) inside; and a sealing part (17) connected to the main tube part. The electrode assemblies extend into the discharge space from and are hermetically sealed with the sealing part such that their tips face each other in the discharge space. The discharge space (13) is filled with mercury as light-emitting material, rare gas such as xenon, and halogen gas for halogen cycle. An electrode assembly is composed of an electrode part (27a), a metal foil (29a), and an external lead. The base part of an electrode inside the discharge space is provided with a liquid collecting coil (43) for holding mercury that gathers around the base part during a cooling period while lighting is off.

Description

technical field [0001] The present invention relates to a high-pressure mercury lamp, a lamp unit using the high-pressure mercury lamp, and an image display apparatus. Background technique [0002] In a high-pressure mercury lamp, a pair of electrodes extends into a mercury-filled discharge space such that the top ends of the electrodes face each other with a distance in between. The lamp is ignited by arc discharge occurring between the pair of electrodes. Thus, the arc discharge between the two electrode tips is called "main discharge". [0003] In such a high-pressure mercury lamp, the main discharge does not first occur between the pair of electrodes, but first discharge occurs at the bottom of one electrode in the discharge space (hereinafter referred to as "electrode bottom part"), and then when in the discharge space The temperature and mercury vapor pressure (gas vapor pressure) rise high enough to become the main discharge. [0004] The discharge that occurs at t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J61/26H01J61/54H01J61/073
CPCH01J61/28H01J61/0732H01J61/26H01J61/54
Inventor 池田胜小野俊介小笹稔山本匡宏长仓强
Owner PANASONIC CORP
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