JPH0610357Y2 - Light source - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a light source device used in a liquid crystal projector or the like.

[Prior Art] FIG. 3 shows a light source device conventionally used in a liquid crystal projector or the like. In the figure, 10 is a rectangular box-shaped light source box made of a metal plate having a circular opening 11 formed in its front surface. Inside the light source box 10, a light source lamp 20 and an illumination light from the light source lamp 20 are supplied to a liquid crystal projector. A reflector 30 for reflecting the light toward the liquid crystal display panel therein is provided. The reflector 30 has an opening surface that is an opening on the front surface of the light source box.
The light source box 10 is disposed laterally facing the light source box 11, and the opening end face is brought into contact with the inner surface of the front plate of the light source box 10.
It is fixed to the front plate of 10 by means of reflector pressing springs 12, 12. Further, as the light source lamp 20, a high voltage arc lamp such as a xenon lamp having a high emission brightness is generally used. This high voltage arc lamp 20
Emits light due to arc discharge between electrodes.This high-voltage arc lamp 20 connects both ends of a glass tube 21 with a tubular base.
In the lamp body sealed with 22, 22, an anode electrode 23 and a cathode electrode 24 are provided with their tips facing each other in the glass tube 21, and the terminals 23 of both electrodes 23, 24 are provided.
The a and 24a are projected at both ends of the lamp body (outer ends of the bases 22 and 22). And this high voltage arc lamp 20
The base 22 on the rear end side is horizontally arranged in the center of the reflector 30 with the lamp insertion hole provided in the base of the reflector 30 protruding rearward of the reflector 30, and the lamp support provided behind the reflector 30. It is supported by the mechanism 40.

The lamp support mechanism 40 will be described. In the figure, reference numeral 41 denotes a metal base plate vertically provided behind the reflector 30 and having a lamp through hole in a central portion thereof.
Are fixed to the leg members 42, 42 mounted on the front plate of the power supply box 10 with screws. Further, 43 is a lamp support plate vertically formed on the rear side of the base plate 41 and made of an insulating material such as a bakeant, and 44 is a tubular cylinder with a flange that is fixed to the center of the lamp support plate 43 with screws. The lamp 20 is the terminal fitting 44, and the end of the base 22 on the rear end side is fitted to the terminal fitting 44 and fixed to the terminal fitting 44 by the fixing nut 45. Lamp support plate 43
Supported by. The fixing nut 45 is a lamp
It is screwed into a screw portion formed on the outer periphery of the rear end side terminal 24a of 20 and is fastened to the outer surface of the terminal fitting 44. Also, 46,
Reference numeral 46 is a plurality of connecting bolts for connecting the lamp support plate 43 to the base plate 41, and 47 and 47 are a plurality of supports interposed between the lamp support plate 43 and the base plate 41 to support the lamp support plate 43. The lamp support plate 43 is a spring (coil spring) and is supported by the base plate 41 by the connecting bolts 46, 46 and the support springs 47, 47. Reference numerals 25 and 25 are lead wires for connecting the high-voltage arc lamp 20 to a power source (not shown). One lead wire 25 is connected to a tip side terminal 23a of the lamp 20, and the other lead wire 25 is the terminal. It is connected to the metal fitting 44, and the lamp 20
It is electrically connected to the rear end side terminal 24a.

Further, in FIG. 3, 50 is the high voltage arc lamp 20.
This is an arc stabilizing magnet (permanent magnet) that stabilizes the direction of the arc generated between the electrodes 23, 24 of the
50 is a light emitting part (arc discharge part) of the high voltage arc lamp 20.
It is located diagonally above and outside the reflector 30, and is attached to the tip of a magnet support member 51 whose base is screwed to the base plate 41.

In FIG. 3, reference numeral 12 is an intake port provided on the bottom surface of the light source box 10, and 13 is an exhaust hole provided on the upper surface of the light source box 10. This light source device is housed in the case of the liquid crystal projector. When some of the cooling air is taken in through the outside air intake of the LCD projector case,
By being introduced into the light source box 10 through the intake port 12 and discharged through the exhaust hole 13, the interior is also air-cooled.

[Problems to be solved by the invention]

However, the conventional light source device described above, while supporting the lamp 20 on the lamp support plate 43 through the terminal metal fitting 44,
The lamp support plate 43 is connected to the connecting bolts 46 and 46 and the supporting spring.
Since the lamp is supported on the base plate 41 by 47, 47, the number of components of the lamp supporting mechanism 40 is large and the assembly thereof is troublesome, and the optical axis of the lamp 20 is aligned with the optical axis of the reflector 30. In addition, since the posture of the lamp support plate 43 must be adjusted by adjusting the tightening amount of the connecting bolts 46, 46, the light source alignment is troublesome, and further, vibration and shock during transportation of the liquid crystal projector etc. Connecting bolt 46,
46 is loose and the lamp support plate 43 is out of position and the lamp 20
It had the drawback that its optical axis could be misaligned. Further, the high-voltage arc lamp 20 generates considerably high heat, but in the above-mentioned conventional light source device, the heat generated by the lamp 20 causes the base plate 41, its leg members 42, 42, and the connecting bolts 46, 46, etc. to expand. The optical axis of the lamp 20 may be displaced, and since the lamp support plate 43 is made of an insulating material such as bakeant, the lamp support plate 43 burns down due to the heat generated by the lamp 20. Not only would the optical axis of the lamp go wrong, but there was a concern that the lamp support plate 43 would ignite in some cases. Moreover, in the above-mentioned conventional light source device, since the magnet supporting member 51 to which the arc stabilizing magnet 50 is attached is screwed to the base plate 41, the arc stabilizing magnet 50 is provided.
I had a problem that installation of was too troublesome.

The present invention has been made in view of the above situation, and its purpose is to easily attach the lamp and to align the optical axis of the lamp with the optical axis of the reflector easily and highly accurately. In addition, there is no need to worry that the optical axis of the lamp will shift due to vibration, shock, or heat generated by the lamp, or ignition due to heat will occur.
Another object is to provide a light source device in which an arc stabilizing magnet can be easily installed.

[Means for solving problems]

According to the invention, a cylindrical neck portion is provided at a base end portion of a reflector, a high-voltage arc lamp is inserted into the neck portion by inserting a rear end side of the high voltage arc lamp into the reflector, and an arc stabilizing magnet is attached to a magnet supporting member. The base is inserted into the neck from the rear end side, and the magnet support member and the lamp are fixed to the reflector by the ceramic adhesive with which the neck member is filled.

[Action]

That is, in the light source device of the present invention, the rear end side of the high voltage arc lamp and the base portion of the magnet supporting member are inserted into the cylindrical neck portion provided at the base end portion of the reflector, and the magnet supporting member and the above-mentioned The lamp and the lamp are fixed to the reflector by a ceramic adhesive. According to this light source device, the lamp is arranged in the reflector with its optical axis aligned with the optical axis of the reflector, and its rear end side is in the neck portion. The lamp can be easily attached by simply inserting it into the neck, filling the neck with a ceramic adhesive and curing it, and the optical axis of the lamp can be easily and accurately aligned with the optical axis of the reflector. In addition, the optical axis of the lamp will not be displaced due to vibration or shock, and since the ceramic adhesive has excellent heat resistance, it will not be affected by the heat generated by the lamp. Or shift the optical axis of the lamp is no fear or to generate fire. Moreover, in this light source device, the base of the magnet supporting member to which the arc stabilizing magnet is attached is inserted into the neck of the reflector, and the magnet supporting member is also fixed by the ceramic adhesive, so that the arc stabilizing magnet can be easily installed. Is.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. The components corresponding to those of the conventional light source device shown in FIG. 3 are denoted by the same reference numerals and the description thereof will be omitted.

In this light source device, a high-voltage arc lamp 20 and illumination light from this lamp 20 are provided in a liquid crystal display panel in a liquid crystal projector in a rectangular box-shaped light source box 10 made of a metal plate having a circular opening 11 formed on the front surface. Reflector 30 that reflects toward
The reflector 30 is installed laterally with its opening surface facing the opening 11 on the front surface of the light source box, and the flange portion 31 protruding on the outer circumference of the opening end is provided in the light source box 10.
It is fixed to the light source box 10 by being sandwiched between the front plate 10a and the reflector sandwiching pieces 14, 14 cut and raised from both side plates of the light source box 10. Also, this reflector 30
A tubular neck portion 32 is provided at the center of the base end portion so as to project rearward. Then, the high-voltage arc lamp 20 is disposed in the reflector with the base portion 22 on the rear end side inserted into the neck portion 32, with the lamp optical axis aligned with the optical axis of the reflector 30, Lamp 20
It is fixed to the reflector 30 by a ceramic adhesive a filled in the neck portion 32. Further, 52 is a magnet supporting member made of a metal plate having an arc stabilizing magnet 50 attached to the upper end thereof, and a substantially U-shaped anchor portion 52a to be inserted into the neck portion is formed at the base of the magnet supporting member 52. The magnet supporting member 52 is provided with an anchor portion 52 at the base thereof.
The a is inserted into the neck portion 32 of the reflector 30 from the rear end side, and is fixed to the reflector 30 by the ceramic adhesive a.

In this light source device, first, the lamp 20 and the magnet supporting member 52 are fixed to the reflector 30 by the ceramic adhesive a,
This reflector 30 is a light source box 1 with the front plate 10a removed.
After being inserted into the light source box 10, the front plate 10a is attached to the light source box 10, and the reflector 30 is assembled by a method of sandwiching and fixing the reflector 30 with the light source box front plate 10a and the reflector sandwiching pieces 14 and 14. The attachment of 20 and the magnet support member 52 is performed as follows. First, the lamp 20 is placed in the reflector 30 by inserting the base 22 portion on the rear end side into the neck portion 32 of the reflector 30 and arranged, and the lamp 20 is temporarily fixed to the open edge of the reflector 30 and is not shown in the optical axis. The lamp optical axis is held by a matching jig
Temporarily fix in a state of being aligned with the optical axis of 30. Also a magnet support member
The arc stabilizing magnet 50 is previously attached to 52,
The anchor portion 52a of the magnet supporting member 52 is attached to the reflector 30.
Insert the reflector 30 into the neck 32 of the
Temporarily fix to. The magnet support member 52 has an anchor portion.
It is temporarily fixed to the reflector 30 by 52a. That is,
The anchor portion 52a of the magnet support member 52 is inserted into the neck portion 32 of the reflector 30 by elastically deforming the upper and lower reflector insertion piece portions inward, and the magnet support member 52 is inserted into the reflector portion of the anchor portion 52a. The one part is temporarily fixed by elastically contacting the inner surface of the neck part 32. The magnet supporting member 52 may be temporarily fixed to the reflector 30 by using not only the anchor portion 52 but also an adhesive tape, a temporary fixing jig, or the like. Then, after the lamp 20 and the magnet support member 52 are temporarily fixed to the reflector 30, the ceramic adhesive a is injected and filled from the inside of the reflector 30 into the neck portion 32, and the ceramic adhesive a is cured to make the lamp. After fixing the 20 and the magnet support member 52 to the reflector 30, the optical axis alignment jig temporarily fixing the lamp 20 is removed (when the magnet support member 52 is also temporarily fixed by an adhesive tape or a temporary fixing jig). Will also remove this adhesive tape and temporary fixing jig).

That is, in this light source device, the rear end side of the high-voltage arc lamp 20 and the base portion of the magnet supporting member 52 are inserted into the cylindrical neck portion 32 provided at the base end portion of the reflector 30 to support the magnet. The member 52 and the lamp 20 are fixed to the reflector 30 with a ceramic adhesive a. According to this light source device, the lamp 20 is placed inside the reflector 30 with its optical axis aligned with the optical axis of the reflector 30. The lamp 20 can be easily mounted by simply disposing it and inserting the rear end side thereof into the neck portion 32, filling the neck portion 32 with the ceramic adhesive a, and curing the same. Can be easily and highly accurately aligned with the optical axis of the reflector 30, and the optical axis of the lamp will not be displaced by vibration or shock, and the ceramic adhesive a has excellent heat resistance. run Or shift the optical axis of the lamp is the heat 20 is generated, there is no fear or to generate fire. Moreover, in this light source device, the base of the magnet supporting member 52 to which the arc stabilizing magnet 50 is attached is attached to the neck portion 32 of the reflector 30.
Since the magnet supporting member 52 is inserted into the inside and fixed by the ceramic adhesive a, the arc stabilizing magnet 50 can be easily arranged. Further, in this light source device, since the lamp 20 and the magnet supporting member 52 are attached to the reflector 30, the lamp 20 and the magnet supporting member 51 are provided behind the reflector 30 as in the conventional light source device shown in FIG. It is not necessary to provide a base plate 41, a lamp support plate 43, or the like for mounting, and therefore, the light source box 10 is different from the conventional light source device.
It is possible to reduce the size of the light source device and reduce the weight and cost of the light source device.

In addition, although the light source device provided with the light source box 10 has been described in the above embodiment, the present invention can also be applied to a light source device without a light source box. The reflector 30 may be fixed.

[Effect of device]

In the light source device of the present invention, a cylindrical neck portion is provided at the base end portion of the reflector, a high voltage arc lamp is inserted into the reflector by inserting the rear end side of the high voltage arc lamp into the reflector, and the lamp is placed inside the neck portion. Since it is fixed to the reflector by a ceramic adhesive filled in the lamp, the lamp can be easily attached, and the optical axis of the lamp can be easily and accurately aligned with the optical axis of the reflector. There is no concern that the optical axis of the lamp will be displaced by the heat generated by the heat generation or ignition due to the heat will be generated, and the arc stabilizing magnet can be installed easily.

[Brief description of drawings]

1 and 2 are a vertical sectional front view and a partially cutaway plan view of a light source device showing an embodiment of the present invention, and FIG. 3 is a vertical sectional front view of a conventional light source device. 10 …… Light source box, 20 …… High voltage arc lamp, 30…
… Reflector, 32 …… Neck part, 50 …… Arc stabilizing magnet, 52 …… Magnetic support member, a …… Ceramic adhesive.

Claims (1)

[Scope of utility model registration request] 1. A light source device comprising a high-voltage arc lamp having terminals at both ends and a reflector for reflecting illumination light from the lamp, wherein a cylindrical neck portion is provided at a base end portion of the reflector, The rear end side of the lamp is inserted into the neck portion and arranged in the reflector, and the lamp and the magnet supporting member for stabilizing the arc of the lamp are stabilized by the ceramic adhesive filled in the neck portion. A light source device characterized by being fixed to.