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Luminotron, light source apparatus, and projector

A technology of a light source device and a luminous tube, which is applied in the field of luminous tubes, and can solve problems such as reduced light utilization efficiency, uneven brightness of lights, and return of light beams from sealed tubes.

Active Publication Date: 2008-04-23
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the above-mentioned high-pressure mercury lamp, since the root side of the electrode is fixed on one side of the metal foil, asymmetry of arrangement tends to occur with respect to the axis of the electrode. When the electrode is fixed at both ends of the sealed tube by shrink sealing , it frequently happens that the electrode is fixed obliquely relative to the axis of the sealed tube
In this case, since the position and size of the arc formed between the electrodes of the high-pressure mercury lamp vary with each product, the brightness of the lamp is uneven, and the temperature distribution is also uneven, resulting in uneven life of the lamp.
In addition, if the position of the arc deviates greatly, the light utilization efficiency obtained by the fly-eye optical system for light uniformity in the next stage, for example, decreases, and the illuminance of the projected image may be greatly reduced.
In addition, in the case of a lamp for a projector, a sub-mirror may be provided opposite to the reflector to return the front light beam from the arc to the arc side. However, if the axis of the electrode relative to the sealed tube exceeds a certain If it is tilted to a certain extent, it is difficult to accurately return the beam from the sealed tube to the arc or its vicinity

Method used

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  • Luminotron, light source apparatus, and projector
  • Luminotron, light source apparatus, and projector
  • Luminotron, light source apparatus, and projector

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Experimental program
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no. 1 Embodiment approach

[0034] Hereinafter, the light source lamp unit as the light source device in the first embodiment of the present invention will be described based on the drawings.

[0035]FIG. 1 is a side sectional view of the light source lamp unit 20 ; FIG. 2 is a perspective view of the light source lamp unit 20 . The light source lamp unit 20 includes, as a light source device, a lamp body 21 as an arc tube, a concave mirror 22 as an elliptical reflector, a sub-reflector 89 as a spherical reflector, and a concave lens 23 . In the light source lamp unit 20 , the lamp main body 21 is a discharge luminescent tube that emits light from the light source, and one end thereof is supported by a concave mirror 22 as a main reflector, and is integrated with the concave mirror 22 to form a lamp assembly. In addition, the concave mirror 22 and the concave lens 23 are fixed to the holder shown in FIG. 2 in an aligned state.

[0036] The lamp main body 21 includes a sealing tube 71, a first conductive...

no. 2 Embodiment approach

[0052] The light source lamp unit of this embodiment is a modification of the light source lamp unit 20 of the first embodiment shown in FIG. The same symbols are assigned to the same parts, and repeated explanations are omitted.

[0053] 5 is a diagram for explaining main parts of the light source lamp unit in the second embodiment; FIGS. Top view and side view to explain the structure.

[0054] In the first conductive member 273A, the first metal foil member 287A is composed of one large foil plate 284e and two small foil plates 284f and 284g, and is fixed by a plurality of fixing parts SW using spot welding or the like. Foil plates 284f and 284g are fixed to both ends of the foil plate 284e. These foil plates 284f and 284g are arranged parallel to each other along the electrode axis AX together with both end portions 284h and 284h of the foil plate 284e. Thereby, in the electrode mounting part (end part) 84a, the base side part 86d of the electrode 86A is sandwiched and fi...

no. 3 Embodiment approach

[0058] The light source lamp unit of this embodiment is a modification of the light source lamp unit 20 of the first embodiment shown in FIG.

[0059] Fig. 6 is a diagram for explaining the main parts of the light source lamp unit in the third embodiment; Top view and side view to explain the structure.

[0060] In the first conductive member 373A, the first metal foil member 387A is composed of only one large foil plate 384e. In this foil plate 384e, a slit CL is provided along the electrode axis AX at a portion corresponding to the electrode mounting portion 84a and the lead wire mounting portion 84b of the first metal foil member 387A. As a result, the foil plate 384e is divided into a first portion 384f and a second portion 384g extending along the electrode axis AX at the electrode mounting portion 84a. Moreover, on the front side shown in FIG. 6(a), the first part 384f is fixed to the base side part 86d of the electrode 86A by using a plurality of fixing parts SW such ...

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Abstract

An arc tube includes ate last one conductive member including a lead wire extending to the outside, an electrode extending to the inside and a metal foil member that is interposed between the lead wire and the electrode and electrically connects the lead wire to the electrode; a sealed tube having a body portion that encloses at least a tip portion of the electrode in an internal source; and a sealed tube having a fixing portion for fixing at least the metal foil member of the conductive member and a root portion of the electrode in a buried manner; wherein the electrode is sandwiched in the root portion from both sides perpendicular to an axis of the electrode using an end portion of the metal foil member.

Description

technical field [0001] The present invention relates to a discharge-type arc tube used as an illumination light source, etc., and to a light source device and a projector incorporating such an arc tube. Background technique [0002] As a light source device for a projector, there is a light source device including a high-pressure mercury lamp and a reflector for converging a light beam from the high-pressure mercury lamp and emitting it forward (see Patent Document 1 and the like). In such a high-pressure mercury lamp, a pair of electrodes are enclosed in a transparent sealed tube constituting the lamp, and lead wires extend outward from the root side of each electrode through a metal foil (see Patent Document 2, etc.). Here, the electrodes and the metal foil are generally airtightly fixed by shrink sealing using heat shrinkage at the end of the sealing tube. [0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 8-314010 [0004] [Patent Document 2] Japane...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J61/36H01J61/04G03B21/14F21S2/00F21Y101/00G03B21/00
CPCH01J61/368G03B21/00G03B21/005
Inventor 竹泽武士
Owner SEIKO EPSON CORP