JP2005266643A - Lamp device, its manufacturing method and projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily control the injection amount of an adhesive for sticking a light emitting tube and a reflector, and to prevent the adhesive from projecting to a reflection surface. <P>SOLUTION: The lamp device 1 is equipped with: the reflector 20 having a reflection base part 22 where a concave reflection surface 21 is formed and a light emitting tube fixed part 23 which is extended to an opposite side to the reflection surface 21 at the center part of the reflection base part 22 and inside which a through-hole 24 is formed; and the light emitting tube 10 constituted by providing a bulb part 11 in which electrodes 12a and 12b are incorporated and a pair of sealing parts 13a and 13b which is formed continuously from the bulb part 11 and in which metallic foils 14a and 14b conducting to the electrodes 12a and 12b are enclosed. Then, a hollow partition part 51 having shape regulating one end of the injection range of the adhesive 40 injected into the gap of the through-hole 24 is stuck to the sealing part 13a so that its center axis is nearly coaxial with the center axis of the sealing part 13a inserted in the through-hole 24. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a lamp device including an arc tube and a reflector, a manufacturing method thereof, and a projector including the lamp device.

Conventionally, there has been known a lamp device in which an arc tube having a sealing portion and a reflector for directing light emitted from the arc tube in a predetermined direction are integrated. The reflector has a reflecting surface composed of a rotating paraboloidal surface or a concave ellipsoidal surface, and an arc tube fixing portion extending in the opposite direction to the reflecting surface at the center of the reflecting surface and having a through hole formed therein. . The assembly of the arc tube and the reflector is performed by inserting the sealing portion of the arc tube into the through-hole and fixing the sealing portion and the reflector with an adhesive (see, for example, Patent Documents 1 and 2). .)
JP-A-8-31382 JP-A-8-36996

In the lamp device as described above, when the arc tube and the reflector are fixed with an adhesive, the adhesive sometimes flows out from the through hole, and there is a problem that the injection amount of the adhesive is difficult to manage. In particular, when the through-hole of the reflector has a tapered shape whose diameter is increased toward the reflecting surface, there is a possibility that the adhesive protrudes to the reflecting surface of the reflector.
The present invention has been made in order to cope with the above-mentioned problems, and it is easy to control the amount of adhesive injected to fix the arc tube and the reflector, and prevents the adhesive from protruding or flowing out to the reflector reflecting surface. It is an object of the present invention to propose a lamp device that avoids the loss of illumination light amount due to the above. Another object of the present invention is to propose a method of manufacturing the lamp device and a projector including the lamp device.

The lamp device of the present invention includes a reflector having a concave reflecting surface, and an arc tube fixing portion extending in the opposite side of the reflecting surface at the center of the reflecting base and having a through hole formed therein. And a light emitting tube comprising a bulb portion in which an electrode is built in and a pair of sealing portions that are formed continuously from the bulb portion and in which a conductor conducting to the electrode is sealed. Is inserted into the through hole of the arc tube fixing part, and the sealing part is fixed to the arc tube fixing part via an adhesive, and is injected into the gap of the through hole A hollow partition portion having a shape defining one end of the adhesive injection range is fixed to the sealing portion with its central axis being substantially coaxial with the central axis of the sealing portion inserted into the through hole. Features.
In the case of this lamp device, the accumulation end of the adhesive injected into the gap between the through holes is determined by the hollow partition member, so that the amount of adhesive injected can be easily managed, and the adhesive also protrudes from the reflective surface. The loss of the amount of illumination light due to the adhesive can be prevented.

  The hollow partition member has a maximum outer diameter portion having an outer diameter substantially equal to the inner diameter of the through hole at one end thereof, and the arc tube fixing in which the maximum outer diameter portion forms the through hole. It is preferable to contact or approach the edge or inner surface of the part. By doing so, it is possible to avoid the hollow partition member from overlapping the reflecting surface, and thus it is possible to reliably prevent the loss of illumination light quantity around the through hole of the reflector. For this purpose, it is particularly preferable to locate the maximum outer diameter portion at the end of the through hole on the reflection surface side.

  The hollow partition member includes a cylindrical portion having an outer diameter smaller than the inner diameter of the through-hole, and the cylindrical portion extends to a terminal portion of the sealing portion. According to this, the hollow partition member can be used as the chuck portion of the arc tube, and the base that has been conventionally provided at the end of the sealing portion can be eliminated.

  In the case where the through hole of the reflector has a tapered shape that is wider on the reflective surface side than on the opposite side, the adhesive easily flows to the reflective surface or the valve portion side. It works particularly effectively.

  The projector according to the present invention includes a light source, a light modulation device that modulates a light beam emitted from the light source according to image information to form an image, and a projection lens that projects the image. Any one of the above lamp devices is provided.

The manufacturing method of the lamp device according to the present invention includes a reflecting base portion having a concave reflecting surface and an arc tube fixing portion extending in the opposite side of the reflecting surface at the center portion of the reflecting base portion and having a through hole formed therein. A lamp device comprising: a bulb portion having a built-in electrode; and a light-emitting tube having a pair of sealing portions formed continuously from the bulb portion and sealed with a conductor that is electrically connected to the electrode. The hollow partition member having an enlarged diameter portion having a maximum outer diameter substantially equal to the inner diameter of the through hole at one end is inserted into one of the sealing portions using the hollow portion. The light emitting step, wherein the sealing portion to which the hollow partition member is fixed is inserted into the through hole of the reflector from the reflective surface side to form the maximum outer diameter portion of the through hole. Abut or close to the edge or inner surface of the tube fixing part A step of adjusting the position of the reflector and the arc tube, and a gap between the through hole in which the sealing portion with the hollow partition member is inserted from a direction opposite to the reflection surface or the reflection. It is characterized by comprising a step of injecting an adhesive from the direction of the surface toward the expanded diameter portion of the hollow partition member and a step of drying the injected adhesive.
According to this manufacturing method, since the end portion of the adhesive that is injected into the gap between the through holes is determined by the hollow partition member, it is easy to manage the injection amount of the adhesive, and the adhesive protrudes from the reflective surface. This eliminates the loss of the amount of illumination light due to the fixing of the arc tube and the reflector.

  Hereinafter, a lamp device according to an embodiment of the present invention, a manufacturing method thereof, and a projector including the lamp device will be described with reference to the drawings. In the drawings, the same portions are denoted by the same reference numerals, and repeated description is omitted.

[Lamp device]
Embodiment 1
FIG. 1 is a cross-sectional view showing a configuration of a lamp device according to Embodiment 1 of the present invention. The lamp device 1 includes an arc tube 10, a reflector 20, and a hollow partition member 51.
The arc tube 10 is, for example, a high-pressure mercury lamp, and is formed of quartz glass or the like, and includes a central bulb portion 11 and a pair of sealing portions 13a and 13b formed continuously from the bulb portion 11 on both sides of the bulb portion 11. Have Inside the bulb part 11, mercury, a rare gas, a small amount of halogen, and the like are sealed, and electrodes 12a and 12b formed of tungsten or the like are arranged. Metal foils 14a and 14b formed of molybdenum or the like conducting to the electrodes 12a and 12b are sealed in the sealing portions 13a and 13b, and power supply leads 15a and 15b to the electrodes 12a and 12b are sealed from the metal foils 14a and 14b. Is pulled out from the end faces of the sealing portions 13a, 13b. The arc tube 10 is not limited to a high-pressure mercury lamp, and may be a metal halide lamp, a xenon lamp, or the like.

  The reflector 20 is a through-hole for inserting and fixing a reflection base 22 having a concave reflecting surface 21 formed in a rotating paraboloidal shape or a rotating ellipsoidal shape, and one sealing portion 13a of the arc tube 10. An arc tube fixing portion 23 formed with a hole 24 inside is provided. The arc tube fixing portion 23 is a cylindrical body extending on the opposite side of the reflecting surface 21 at the central portion of the reflecting base portion 22 where the light emitted from the bulb portion 11 does not come. Here, the shape of the through hole 24 is a taper shape that is wider on the reflection surface 21 side than the opposite side, but other than this, the reverse taper shape or a cylindrical shape having the same diameter as a whole may be used. Good. The reflection base portion 22 and the arc tube fixing portion 23 are generally formed in a funnel shape integrally with heat-resistant glass.

The hollow partition member 51 serves to define one end of the injection range of the adhesive 40 injected into the gap of the through hole 24 in which the sealing portion 13a is inserted, and its central axis is inserted into the through hole 24. The sealing portion 13a is substantially coaxial with the central axis of the sealing portion 13a and is fixed to the sealing portion 13a with an adhesive 50. The hollow partition member 51 has one end portion that extends toward the end thereof, and the end portion has a maximum outer diameter that is substantially equal to the inner diameter of the through hole 24 (here, the inner diameter of the end of the through hole 24 on the reflecting surface 21 side). It has a cup-shaped enlarged diameter portion 51a as a part, and has a cylindrical portion 51b having a constant outer diameter smaller than the inner diameter of the through hole 24 continuous from the enlarged diameter portion 51a. The inner surface of the cylindrical part 51b is used for fixing to the sealing part 13a. The hollow partition member 51 is preferably manufactured using quartz glass, alumina glass, or the like. In addition, without providing the cylindrical part 51b in the hollow partition member 51, you may make it use the inner surface or end surface of the enlarged diameter part 51a for adhering with the sealing part 13a.
Such a sealing portion 13a with the hollow partition member 51 is formed on the reflection surface 21 side edge or the reflection surface 21 side end inner surface of the arc tube fixing portion 23 in which the through hole 24 is formed in the maximum outer diameter portion of the hollow partition member 51. It is inserted into the penetrating light 24 until it comes into contact with or is close to. In this state, the sealing portion 13 a with the hollow partition member 51 and the arc tube fixing portion 23 are fixed via the adhesive 40 to form the lamp device 1.

By the way, as the adhesive 40 for fixing the arc tube 10 to the reflector 20 and the adhesive 50 for fixing the hollow partition member 51 to the arc tube 10, a silica-based or alumina-based inorganic adhesive can be used. . As a specific product of such an adhesive, for example, there is Sumiceram (Sumicellum: registered trademark of Sumitomo Chemical Co., Ltd.).
Further, the arc tube 10 may include a secondary mirror disposed opposite to the reflector 20 with the bulb portion 11 interposed therebetween, and the secondary mirror can also be fixed to the sealing portion 13b using this adhesive.

  The lamp device 1 of FIG. 1 reflects the light emitted from the bulb portion 11 by the reflecting surface 21 of the reflector 20 and irradiates it in a direction corresponding to the shape of the reflecting surface 21. In the lamp device 1, the end portion on the reflecting surface 21 side of the injection range of the adhesive 40 is defined by the hollow partition member 51, and the inner surface of the arc tube fixing portion 23, the outer surface of the hollow partition member 51, the sealing portion 13 a, and the like. Since the adhesive 40 is stored in the portion surrounded by the, the amount of the adhesive 40 injected can be easily managed. Further, since the adhesive 40 is prevented from protruding from the gap on the reflective surface 21 side of the through hole 24 by the hollow partition member 51, the adhesive 40 is not applied to the reflective surface 21. Furthermore, since the maximum outer diameter portion of the hollow partition member 51 is substantially equal to the inner diameter of the through hole 24, the hollow partition member 51 does not overlap the reflective surface 21. Accordingly, it is possible to prevent the loss of the irradiation light amount due to the fixing of the arc tube 10 to the reflector 20.

FIG. 2 is a cross-sectional view showing another example (part 1) of the lamp device according to the first embodiment. Since the arc tube 10 and the reflector 20 shown in FIGS. 2 to 6 are the same as those shown in FIG. 1, the internal configuration of the arc tube 10 is not shown.
The difference between the lamp device 1A of FIG. 2 and the lamp device 1 of FIG. 1 is only the shape of the hollow partition member and the injection range of the adhesives 40 and 50 associated therewith, and the other configurations are the same. That is, the hollow partition member 52 has one end portion extending toward the end thereof, and the end portion having an outer diameter substantially equal to the inner diameter of the through hole 24 (here, the inner diameter of the end of the through hole 24 on the reflecting surface 21 side). It has a cup-shaped enlarged diameter portion 52a as the maximum outer diameter portion, and has a tapered portion 52b having a tapered shape continuous from the enlarged diameter portion 52a. And the inner surface of the taper part 52b is provided for adhering with the sealing part 13a. In this lamp device 1A, the end of the reflective surface 21 in the injection range of the adhesive 40 is defined by the hollow partition member 52, and the inner surface of the arc tube fixing portion 23, the outer surface of the hollow partition member 52, the sealing portion 13a, etc. The adhesive 40 is stored in the enclosed portion. Thereby, the lamp device 1 </ b> A has substantially the same effect as the lamp device 1.

  FIG. 3 is a cross-sectional view showing another example (part 2) of the lamp device according to the first embodiment. The only difference between the lamp device 1B of FIG. 3 and the lamp device 1 of FIG. 1 is the shape of the hollow partition member and the injection range of the adhesives 40 and 50 associated therewith, and the other configurations are the same. That is, the hollow partition member 53 has one end portion extending toward the end thereof, and the end portion having an outer diameter substantially equal to the inner diameter of the through hole 24 (here, the inner diameter of the end of the through hole 24 on the reflecting surface 21 side). It has a tapered enlarged diameter portion 53a as a maximum outer diameter portion, and also has a cylindrical portion 53b having a constant outer diameter smaller than the inner diameter of the through hole 24 continuous from the enlarged diameter portion 53a. And the inner surface of the cylindrical part 53b is provided for adhering with the sealing part 13a. In this lamp device 1B, the end portion on the reflecting surface 21 side of the injection range of the adhesive 40 is defined by the hollow partition member 53, and the inner surface of the arc tube fixing portion 23, the outer surface of the hollow partition member 53, the sealing portion 13a, and the like. The adhesive 40 is stored in the enclosed portion. Thereby, the lamp device 1B has substantially the same effect as the lamp device 1.

  FIG. 4 is a cross-sectional view showing another example (part 3) of the lamp device according to the first embodiment. The difference between the lamp device 1C of FIG. 4 and the lamp device 1 of FIG. 1 is only the shape of the hollow partition member and the injection range of the adhesives 40 and 50 associated therewith, and the other configurations are the same. That is, the hollow partition member 54 as a whole has one taper shape, and one end portion extends toward the end thereof, and the end portion thereof extends to the inner diameter of the through hole 24 (here, the reflection surface 21 of the through hole 24). The maximum outer diameter portion having an outer diameter substantially equal to the inner diameter of the side end portion). And the inner surface of the hollow partition member 54 is provided for adhering with the sealing part 13a. In this lamp device 1C, the end of the reflective surface 21 in the injection range of the adhesive 40 is defined by the hollow partition member 54, and the inner surface of the arc tube fixing portion 23, the outer surface of the hollow partition member 54, the sealing portion 13a, etc. The adhesive 40 is stored in the enclosed portion. Thereby, the lamp device 1 </ b> C has substantially the same effect as the lamp device 1.

  FIG. 5 is a sectional view showing another example (No. 4) of the lamp device according to the first embodiment. The only difference between the lamp device 1D of FIG. 5 and the lamp device 1 of FIG. 1 is the shape of the hollow partition member and the injection range of the adhesives 40 and 50 associated therewith, and the other configurations are the same. That is, the hollow partition member 55 has one end portion that extends toward the end thereof, and the end portion is substantially equal to the inner diameter of the through hole 24 (here, the inner diameter of the end of the through hole 24 opposite to the reflecting surface 21). It has a tapered enlarged diameter portion 55a which is the largest outer diameter portion of the outer diameter, and has a cylindrical portion 55b having a constant outer diameter smaller than the inner diameter of the through hole 24 continuous from the enlarged diameter portion 55a. And the inner surface of the cylindrical part 55b is provided for adhering with the sealing part 13a. In the lamp device 1D, the hollow partition member 55 defines the injection range of the adhesive 40 at the end opposite to the reflecting surface 21 of the reflector 20, and the inner surface of the arc tube fixing portion 23 and the outer surface of the hollow partition member 54 Since the adhesive 40 is stored in the portion surrounded by the, the amount of injection can be easily managed. Therefore, on the reflective surface 21 side of the reflector 20, the injection amount can be adjusted appropriately so that the adhesive 40 does not flow out to the reflective surface 21, and also in this apparatus 1D, the amount of illumination light caused by the adhesive 40 is lost. Can be prevented.

Embodiment 2
FIG. 6 is a sectional view showing a lamp device according to Embodiment 2 of the present invention. The difference between the lamp device 1E of FIG. 6 and the lamp device 1 of FIG. 1 is only the shape of the hollow partition member and the injection range of the adhesives 40 and 50 associated therewith, and the other configurations are the same. That is, the hollow partition member 53 has one end portion extending toward the end thereof, and the end portion having an outer diameter substantially equal to the inner diameter of the through hole 24 (here, the inner diameter of the end of the through hole 24 on the reflecting surface 21 side). It has a cup-shaped or tapered expanded diameter portion 56a as the maximum outer diameter portion. Moreover, it has the cylindrical part 56b of constant outer diameter smaller than the internal diameter of the through-hole 24 extended to the position exceeding the terminal part of the sealing part 13a continuously from the enlarged diameter part 56a. The inner surface of the cylindrical portion 56 b is used for fixing to the sealing portion 13 a through the adhesive 50. In addition, when the length which protrudes from the through-hole 24 of the sealing part 13a becomes long, the cylindrical part 56b should just be extended to the termination | terminus of the sealing part 13a, and it is not necessary to extend beyond a termination | terminus part. .
The lamp device 1E has the same effect as the lamp device 1. In addition, the cylindrical portion 56b at the end portion of the sealing portion 13a can be used as a chuck portion when the arc tube 10 is positioned. The advantage of using the cylindrical portion 56b as the chuck portion of the arc tube 10 is that the outer shape is more uniform and easier to chuck than the sealing portion 13a, and unlike the base and the like conventionally provided in this portion, the hollow partition For example, since the member 56 is made of quartz glass or the like, the thermal expansion is substantially the same as that of the sealing portion 13a.

[Lamp Device Manufacturing Method]
FIG. 7 is a flowchart showing a manufacturing method of the lamp device according to the embodiment of the present invention. Next, an example of a manufacturing method of the lamp device 1 shown in FIG. 1 will be described according to FIG.
First, the arc tube 10, the reflector 20, and the hollow partition member 51 are prepared. First, after the hollow partition member 51 is inserted to the vicinity of the center of the sealing portion 13a of the arc tube 10 using the hollow portion, and the hollow partition member 51 and the sealing portion 13a are disposed substantially coaxially. Then, the adhesive 50 is injected between the inner surface of the cylindrical portion 51b and the sealing portion 13a to fix the hollow partition member 51 to the sealing portion 13a (S1).
Subsequently, the sealing portion 13 a to which the hollow partition member 51 is fixed is inserted into the through hole 24 of the reflector 20 from the reflective surface 21 side, and the maximum outer diameter portion of the hollow partition member 51 is formed as the through hole 24. Contact or approach the edge or inner surface of the arc tube fixing portion 23 (S2).
Next, position adjustment of the reflector 20 and the arc tube 10 is performed so that the light utilization state is the best (S3).
Then, in the gap between the through hole 24 surrounded by the inner surface of the arc tube fixing portion 23, the outer surface of the hollow partition member 51, and the sealing portion 13 a, the direction from the opposite direction to the reflecting surface 21 toward the enlarged diameter portion 51 a of the partition member 51. Then, the adhesive 40 is poured and the gap is filled with the adhesive (S4).
Finally, when the injected adhesive 40 is dried, the lamp device 1 in which the arc tube 10 is fixed to the reflector 20 is completed (S5).

  In the above method, the accumulation end portion of the adhesive 40 injected into the gap between the through holes 24 is determined by the hollow partition member 51, so that the injection amount of the adhesive can be easily managed, and the reflective surface 21 of the adhesive 40 As a result, the amount of illumination light caused by the adhesive 40 is prevented from being lost. The above methods and effects are common to the lamp devices 1, 1A, 1B, 1C, and 1E shown in FIGS. However, in the lamp device 1 </ b> E shown in FIG. 6, the adhesive 50 is injected into the gap between the inner surface of the arc tube fixing portion 23 and the outer surface of the hollow partition member 56.

In the assembly of the lamp device 1D shown in FIG. 5, the injection of the adhesive 40 in S4 is performed in the gap between the through hole 24 surrounded by the inner surface of the arc tube fixing portion 23 and the outer surface of the hollow partition member 55. In this case, since the injection amount of the adhesive 40 can be easily grasped, it is easy to prevent the adhesive 40 from flowing into the reflecting surface 21. Is possible.
In addition, when the operation | work which inject | pours the adhesive agent 50 in those clearance gaps in order to fix the hollow partition member 51 to the sealing part 13a in said S1 is performed from the enlarged diameter part 51a side of the hollow partition member 51, injection | pouring is comparatively comparative. It is easy and leakage of the adhesive 50 can be prevented. This is the same when other hollow partition members are used.

〔projector〕
FIG. 8 is a configuration diagram of the projector 100 according to the embodiment of the present invention. The projector 100 includes an illumination optical system 300, a color light separation optical system 380, a relay optical system 390, liquid crystal panels 410R, 410G, and 410B, a cross dichroic prism 420, a projection lens 600, and the like.

Next, the operation of the projector 100 will be described.
The illumination optical system 300 is an integrator illumination optical system for illuminating the image forming areas of the liquid crystal panels 410R, 410G, and 410B substantially uniformly, and includes any one of the lamp devices 1 to 1E described above, here, the lamp device 1; A first lens array 320, a second lens array 340, a polarization conversion element array 360, and a superimposing lens 370 are provided.
First, light emitted from the arc tube 10 is reflected directly or by the reflecting mirror 20, enters the concave lens 200, and the traveling direction of the light is adjusted substantially parallel to the optical axis of the illumination optical system 300.

  The collimated light enters each small lens 321 of the first lens array 320 and is divided into a plurality of partial light beams according to the number of small lenses 321. Further, each partial light beam exiting the first lens array 320 is incident on a second lens array 340 having a small lens 341 corresponding to each small lens 321.

  The outgoing light from the second lens array 340 is incident on a polarization conversion element array 360 that aligns the light deflection direction with the same type of linearly polarized light. Then, the plurality of partial light beams whose polarization directions are aligned by the polarization conversion element array 360 enter the superimposing lens 370, where the partial light beams incident on the liquid crystal panels 410R, 410G, and 410B overlap on the corresponding panel surface. Adjusted to fit.

The light exiting the superimposing lens 370 is reflected by the reflection mirror 372 and then enters the color light separation optical system 380. The color light separation optical system 380 is an optical system that separates the light emitted from the illumination optical system 300 into three color lights (color light components) of red, green, and blue, and includes dichroic mirrors 382 and 386, and a reflection mirror 384. With.
The first dichroic mirror 382 transmits red light out of the light emitted from the superimposing lens 370 and reflects blue light and green light. Then, the red light passes through the first dichroic mirror 382 and is reflected by the reflection mirror 384, and reaches the red light liquid crystal panel 410R through the field lens 400R. Of the blue light and green light reflected by the first dichroic mirror 382, green light is reflected by the second dichroic mirror 386, and reaches the green light liquid crystal panel 410G through the field lens 400G.

On the other hand, the blue light passes through the second dichroic mirror 386 and enters the relay optical system 390. The relay optical system 390 is an optical system having a function of guiding the blue light transmitted through the dichroic mirror 386 of the color light separation optical system 380 to the liquid crystal panel 400B, and includes an incident side lens 392, a relay lens 396, and reflection mirrors 394, 398. With.
That is, the blue light passes through the incident side lens 392, the reflection mirror 394, the relay lens 396, and the reflection mirror 398, and further passes through the field lens 400B to reach the blue light liquid crystal panel 410B. The reason why the relay optical system 390 is used for blue light is that the optical path length of blue light is longer than the optical path lengths of other color lights, so that the light use efficiency is prevented from being reduced due to light divergence or the like. It is. That is, this is because the partial light beam incident on the incident side lens 392 is transmitted to the field lens 400B as it is. In addition, although the relay optical system 390 is configured to pass blue light out of the three color lights, the relay optical system 390 may be configured to pass other color light such as red light.

  Subsequently, the three liquid crystal panels 410R, 410G, and 410B modulate each color light incident thereon according to the given image information to form an image of each color light. Note that polarizing plates are usually provided on the light incident surface side and the light emitting surface side of each of the liquid crystal panels 410R, 410G, and 410B.

Subsequently, the modulated light of each color light emitted from each liquid crystal panel 410R, 410G, 410B is incident on a cross dichroic prism 420 as a color light combining optical system that combines these modulated lights to form a color image. In the cross dichroic prism 420, a dielectric multilayer film that reflects red light and a dielectric multilayer film that reflects blue light are formed in an approximately X shape at the interface of four right-angle prisms. Three colored lights are synthesized by the film.
The color image emitted from the cross dichroic prism 420 is enlarged and projected on the screen by the projection lens 600.

Since the projector 100 includes any one of the lamp devices 1 to 1E according to the present invention, loss of the amount of illumination light by the lamp device itself is suppressed, and the projector has high light use efficiency.
The projector 100 of the present invention is not limited to the above-described embodiment, and can be implemented in various modes without departing from the gist thereof. For example, the following modifications are possible.

In the above embodiment, the two lens arrays 120 and 130 that divide the light emitted from the lamp device 1 into a plurality of partial light beams are used. However, the present invention is also applicable to a projector that does not use such a lens array. It is.
In the above embodiment, a projector using a transmissive liquid crystal panel has been described as an example. However, the present invention is not limited to this, and can be applied to a projector using a reflective liquid crystal panel. . In the case of a projector using a reflective liquid crystal panel, the projector can be configured only by a liquid crystal panel, and a pair of polarizing plates is not necessary. In a projector using a reflective liquid crystal panel, the cross dichroic prism is used as color light separation means for separating illumination light into light of three colors, red, green, and blue, and modulated three-color light. May also be used as color light combining means for combining the light beams again and emitting them in the same direction. Further, instead of the cross dichroic prism, there may be used a dichroic prism in which a plurality of triangular or square dichroic prisms are combined. Even when the present invention is applied to a projector using a reflective liquid crystal panel, the same effect as that of a projector using a transmissive liquid crystal panel can be obtained.
Further, the projector using three liquid crystal panels as the modulation device has been described as an example. However, the present invention can also be applied to a projector configured to use one, two, or four or more liquid crystal panels.

  Further, the light modulation device that generates an image by modulating incident light is not limited to the liquid crystal panel, and may be a device using a micromirror, for example. Furthermore, the lamp device of the present invention is applicable to any projector such as a front projection projector that projects an image from the direction of observing the projection plane or a rear projection projector that projects an image from the side opposite to the direction of observing the projection plane. Is also applicable.

Sectional drawing which shows the lamp device which concerns on Embodiment 1 of this invention. Sectional drawing which shows another example (the 1) of the lamp device which concerns on Embodiment 1. FIG. Sectional drawing which shows another example (the 2) of the lamp device which concerns on Embodiment 1. FIG. Sectional drawing which shows another example (the 3) of the lamp device which concerns on Embodiment 1. FIG. Sectional drawing which shows another example (the 4) of the lamp device which concerns on Embodiment 1. FIG. Sectional drawing which shows the lamp device which concerns on Embodiment 2. FIG. The flowchart which shows the manufacturing method of the lamp device which concerns on embodiment. 1 is a configuration diagram of a projector according to an embodiment of the invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1A, 1B, 1C, 1D, 1E ... Lamp apparatus, 10 ... Arc tube, 11 ... Bulb part, 12a, 12b ... Electrode, 13a, 13b ... Sealing part, 14a, 14b ... Metal foil, 15a, 15b ... Lead, 20 ... reflector, 21 ... concave reflecting surface, 22 ... reflective base, 23 ... arc tube fixing part, 24 ... through hole, 40 ... adhesive, 50 ... adhesive, 51, 52, 53, 54, 55, 56 ... Hollow partition member, 400R, 400G, 400B ... Liquid crystal panel, 600 ... Projection lens.

Claims (8)

A reflector having a reflecting base formed with a concave reflecting surface, an arc tube fixing portion extending in the opposite side of the reflecting surface at the center of the reflecting base and having a through hole formed therein, and an electrode are incorporated An arc tube having a bulb portion and a pair of sealing portions formed continuously from the bulb portion and sealed with a conductor conducting to the electrode, and one of the sealing portions is fixed to the arc tube A lamp device that is inserted into a through hole of a portion and the sealing portion is fixed to the arc tube fixing portion via an adhesive,
A hollow partition portion having a shape that defines one end of an injection range of the adhesive to be injected into the gap between the through holes, a central axis of the hollow partition portion being substantially coaxial with a central axis of the sealing portion inserted into the through hole A lamp device characterized by being fixed to the sealing portion.   The hollow partition member has a maximum outer diameter portion having an outer diameter substantially equal to the inner diameter of the through hole at one end thereof, and the edge of the arc tube fixing portion that forms the through hole as the maximum outer diameter portion The lamp device according to claim 1, wherein the lamp device is in contact with or close to the inner surface.   The lamp device according to claim 2, wherein the maximum outer diameter portion is positioned at an end portion of the through hole on the reflection surface side.   The hollow partition member includes a cylindrical portion having an outer diameter smaller than the inner diameter of the through hole, and the cylindrical portion extends to a terminal portion of the sealing portion. A lamp device according to claim 1.   The lamp device according to any one of claims 1 to 4, wherein the through hole of the reflector has a tapered shape on the reflecting surface side that is wider than the opposite side.   6. A projector comprising: a light source; a light modulation device that modulates light emitted from the light source according to image information to form an image; and a projection lens that projects the image. A projector comprising the lamp device according to any one of the above. A reflector having a reflecting base formed with a concave reflecting surface, an arc tube fixing portion extending in the opposite side of the reflecting surface at the center of the reflecting base and having a through hole formed therein, and an electrode are incorporated A manufacturing method of a lamp device that combines a bulb part and an arc tube having a pair of sealing parts formed continuously from the bulb part and sealed with a conductor conducting to the electrode, Inserting and fixing a hollow partition member having an enlarged diameter portion having a maximum outer diameter substantially equal to the inner diameter of the through hole at one end to one of the portions using the hollow portion; and
An edge of the arc tube fixing portion in which the sealing portion to which the hollow partition member is fixed is inserted into the through hole of the reflector from the reflective surface side and the maximum outer diameter portion is formed as the through hole. Or contacting or approaching the inner surface;
Adjusting the position of the reflector and the arc tube;
Injecting an adhesive into the gap between the through holes into which the sealing portion with the hollow partition member is inserted from the direction opposite to the reflecting surface toward the expanded diameter portion of the hollow partition member;
Drying the injected adhesive;
The manufacturing method of the lamp device characterized by the above-mentioned. A reflector having a reflecting base formed with a concave reflecting surface, an arc tube fixing portion extending in the opposite side of the reflecting surface at the center of the reflecting base and having a through hole formed therein, and an electrode are incorporated A manufacturing method of a lamp device that combines a bulb part and an arc tube having a pair of sealing parts formed continuously from the bulb part and sealed with a conductor conducting to the electrode, Inserting and fixing a hollow partition member having an enlarged diameter portion having a maximum outer diameter substantially equal to the inner diameter of the through hole at one end to one of the portions using the hollow portion; and
An edge of the arc tube fixing portion in which the sealing portion to which the hollow partition member is fixed is inserted into the through hole of the reflector from the reflective surface side and the maximum outer diameter portion is formed as the through hole. Or contacting or approaching the inner surface;
Adjusting the position of the reflector and the arc tube;
Injecting an adhesive from the reflective surface direction toward the diameter-enlarged portion direction of the hollow partition member into the gap of the through-hole into which the sealing portion with the hollow partition member is inserted;
Drying the injected adhesive;
The manufacturing method of the lamp device characterized by the above-mentioned.

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