JP2005283707A - Method for manufacturing lamp device, lamp device and projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a lamp device with which positioning a light emitting tube and a reflector is facilitated, and a lamp device and a projector. <P>SOLUTION: The method for manufacturing the lamp device includes a step where a barrel member 61 engaged with the edge 25 of a through-hole starting part on the reflection surface 21 side of a light emitting tube fixed part 23 and served for positioning with respect to the reflector 20 is inserted in either side of a sealing part 13a and stuck so that an engaging part 61a with the reflector 20 may show prescribed positional relation to the center of light emission of the light emitting tube 10, and a step where the sealing part 13a to which the barrel member 61 is attached is inserted in a through-hole 24 until the engaging part 61a is engaged with the edge 25 so that the sealing part 13a may be fixed at the light emitting tube fixed part 23. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a lamp device including an arc tube and a reflector, 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 arc tube and the reflector are assembled by inserting the sealing portion of the arc tube into the through-hole and fixing the sealing portion and the reflector with an adhesive or the like (see, for example, Patent Documents 1 and 2). .)
JP-A-8-31382 JP-A-8-36996

In the lamp device described above, from the viewpoint of efficient use of light, the light emission center of the arc tube needs to be positioned so as to come to a predetermined position with respect to the reflector. However, since the emission center of the arc tube is usually located within the concave surface of the reflector, the position cannot be accurately grasped. For this reason, conventionally, the arc tube is turned on, light is passed through a predetermined optical system, and the arc tube is adjusted and fixed at a place where the brightness and illumination are optimal, which is difficult and time consuming.
SUMMARY OF THE INVENTION The present invention has been made to address the above-described problems. A manufacturing method of a lamp device that facilitates the positioning of the arc tube and the reflector, the lamp device in which the arc tube and the reflector are appropriately positioned, and the lamp device. The purpose is to propose a projector equipped.

The manufacturing method of the lamp device according to 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 surface and having a through hole formed therein. And a lamp device manufacturing method for attaching an arc tube having a pair of sealing portions that are formed continuously from the bulb portion and a conductor that is electrically connected to the electrode is sealed, A cylindrical member that is engaged with the edge of the through hole start portion on the reflective surface side of the arc tube fixing portion and is used for positioning with the reflector is inserted into one of the sealing portions and engaged with the reflector. A step of fixing the portion so as to have a predetermined positional relationship with the light emission center of the arc tube, and inserting the sealing portion with the cylindrical member into the through-hole until the cylindrical member engages with the edge. To fix the sealing part to the arc tube fixing part. A step, in which with a.
In addition, a bulb part having an electrode built-in in a reflector having a concave reflecting surface and an arc tube fixing part extending in the opposite side of the reflecting surface at the center of the reflecting surface and having a through-hole formed therein, and A manufacturing method of a lamp device for attaching an arc tube having a pair of sealing portions formed continuously from a bulb portion and sealed with a conductor conducting to the electrode, the through-hole of the arc tube fixing portion A cylindrical member that engages with a through hole taper portion that forms an inner wall surface and is used for positioning with the reflector is inserted into one of the sealing portions, and the engaging portion with the reflector emits light from the arc tube. A step of adhering so as to have a predetermined positional relationship with the center, and inserting the sealing portion with the cylindrical member into the through-hole until the cylindrical member engages with the tapered portion. Fixing to the arc tube fixing portion, It is.

  According to these methods, the tube member is preliminarily positioned and fixed to the sealing portion so that the engaging portion with the reflector is at a predetermined position with respect to the light emission center of the arc tube. When attaching to the reflector, the light emitting center of the arc tube can be appropriately positioned with respect to the reflector simply by inserting the sealing portion with the cylindrical member until the cylindrical member engages with the reflector.

The cylindrical member is fixed to the arc tube fixing portion by fitting with the through hole. This eliminates the need for an adhesive between the arc tube and the reflector, and also facilitates separation of the reflector and the arc tube as compared to fixing with an adhesive.
Further, the cylindrical member is manufactured by a molding die, and the engagement surface with the reflector is a contact surface with the molding die. According to this, since the shape of the engagement surface of the tubular member with the reflector is accurately formed, the positioning accuracy of the arc tube with respect to the reflector is improved.

The lamp device according to 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 surface and having a through hole formed therein, and an electrode. And a light-emitting tube having a pair of sealing parts formed continuously from the valve part and sealed with a conductor conducting to the electrode, and a cylindrical member on one of the sealing parts Is inserted and fixed in place, the sealing portion with the cylindrical member is inserted into the through-hole of the reflector, and the outer surface of the cylindrical member is on the reflecting surface side of the arc tube fixing portion. It is engaged and fixed to the edge of the through-hole starting part.
In addition, a reflector having a concave reflecting surface and an arc tube fixing portion extending through the center of the reflecting surface on the opposite side of the reflecting surface and having a through hole formed therein, a bulb portion having an electrode built therein, and the An arc tube having a pair of sealing portions formed continuously from the bulb portion and sealed with a conductor conducting to the electrode, and a cylindrical member is inserted into one of the sealing portions and has a predetermined A through hole taper that is fixed at a position, a sealing portion with the cylindrical member is inserted into the through hole of the reflector, and an outer surface of the cylindrical member constitutes an inner wall surface of the through hole of the arc tube fixing portion It is engaged and fixed to the part.

  In these lamp devices, the tube member is positioned in advance so that the engaging portion with the reflector is at a predetermined position with respect to the light emission center of the arc tube, and is fixed to the sealing portion. The light emission center can be easily positioned at an appropriate position with respect to the reflector, so that the light utilization rate of the lamp device is also improved.

  Furthermore, the projector of 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. One of the above lamp devices is provided as a light source.

  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 cylindrical member 61.
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 made of a heat-resistant glass substrate such as quartz glass, borosilicate glass, or alumina glass, and has a concave reflecting surface 21 formed in a paraboloidal shape or a spheroidal shape, and one of the arc tubes 10. The arc tube fixing portion 23 is formed by forming a through hole 24 for inserting and fixing the sealing portion 13a. The arc tube fixing portion 23 is a cylindrical body that extends to the opposite side of the reflecting surface 21 at the central portion of the reflecting surface 21 where the light emitted from the bulb portion 11 does not come. The reflector 20 is usually formed by pressing the reflecting surface side shape and the through-hole 24 with a molding die, and a through-hole starting portion edge 25 on the reflecting surface side of the arc tube fixing portion 23 is a cylinder to be described later. The member 61 has a shape that can be engaged.

The cylindrical member 61 is made of heat-resistant glass or the like similar to the reflector 20, and includes an engaging portion 61a that performs a positioning action when the arc tube 10 is attached to the reflector 20, and a fixing portion 61b that is used for fixing the sealing portion 13a. It is equipped with. The cylindrical member 61 is inserted into the sealing portion 13a, and is fixed to a predetermined position of the sealing portion 13a with an adhesive 50 so that the central axis of the cylindrical member 61 and the central axis of the sealing portion 13a are substantially coaxial. . This predetermined position is the light emission center (electrode 12a and electrode 12b) of the arc tube 10 when the engaging portion 61a of the cylindrical member 61 is engaged with the through hole start portion edge 25 on the reflecting surface side of the arc tube fixing portion 23. Is the position where the positional relationship between the reflector 20 and the reflector 20 is appropriate or optimal from the viewpoint of light utilization.
The cylindrical member 61 is manufactured by placing a tube material such as quartz glass in a mold and sending air or argon gas into the tube, so that the outer shape can match the internal shape of the mold. . In this case, the outer surface of the cylindrical member 61 is a contact surface with the mold, and the shape accuracy is good. The same applies to cylinder members 62 and 63 described later.

  The through hole 24 has a tapered shape whose side of the reflecting surface 21 is wider than the opposite side, and the fixing portion 61 b of the cylindrical member 61 is formed in a tapered shape that fits into the through hole 24. The sealing portion 13a with the cylindrical member 61 is fitted and inserted into the through hole 24 in a state where the engaging portion 61a is engaged with the through hole start portion edge 25 on the reflecting surface side of the arc tube fixing portion 23. It is fixed.

  The lamp device 1 of FIG. 1 can easily position the light emission center of the arc tube 10 and the reflector 20 by the action of the cylindrical member 61 attached to the arc tube 10 at a predetermined position. Moreover, since the light emission center of the arc tube 10 and the reflector 20 are in an appropriate positional relationship, the light utilization rate is improved. Furthermore, since the arc tube 10 and the reflector 20 are not fixed with an adhesive, they can be easily disassembled accordingly.

Embodiment 2
FIG. 2 is a cross-sectional view showing a configuration of a lamp device 1A according to Embodiment 2 of the present invention. The lamp device 1 </ b> A includes an arc tube 10, a reflector 20 </ b> A, and a cylindrical member 62. The arc tube 10 is exactly the same as that of FIG. The reflector 20A is also the same as that of FIG. 1 except for the shapes of the arc tube fixing portion 23 and the through hole 24. Here, the inner wall end portion of the through hole 24 of the arc tube fixing portion 23 is configured as a through hole taper portion 26 that bends discontinuously with respect to the previous portion and narrows toward the end.
The cylindrical member 62 is made of heat-resistant glass or the like, and includes an engaging portion 62a that performs a positioning operation when the arc tube 10 is attached to the reflector 20A, and a fixing portion 62b that is used for fixing to the sealing portion 13a. The cylindrical member 62 is inserted into the sealing portion 13a, and the central axis of the cylindrical member 62 and the central axis of the sealing portion 13a are substantially coaxial, and are fixed to a predetermined position of the sealing portion 13a by the adhesive 50. . This predetermined position is the light emission center (electrode 12a) of the arc tube 10 when the engaging portion 62a of the cylindrical member 62 is engaged with the through hole taper portion 26 constituting the inner wall surface of the through hole 24 of the arc tube fixing portion 23. And the center of the electrode 12b) and the reflector 20A are positions that are appropriate or optimal from the viewpoint of light utilization.
As a whole, the through hole 24 has a tapered shape on the reflecting surface 21 side that is wider than the opposite side. On the other hand, the fixing portion 62b of the cylindrical member 62 is formed in a cylindrical shape having the same diameter. And this sealing part 13a with the cylindrical member 62 is inserted in the through-hole 24 in the state which engaged the engaging part 62a with the through-hole taper part 26, and also the arc-tube fixing | fixed part 23 via the adhesive agent 40 It is fixed to.

  The lamp device 1A of FIG. 2 can easily position the light emission center of the arc tube 10 and the reflector 20A by the action of the cylindrical member 62 attached to the arc tube 10 at a predetermined position. Moreover, the light emission center is improved and the light utilization rate is improved because the light emission center of the arc tube 10 and the reflector 20A have an appropriate positional relationship.

Embodiment 3
FIG. 3 is a cross-sectional view showing a configuration of a lamp device 1B according to Embodiment 3 of the present invention. The lamp device 1B includes an arc tube 10, a reflector 20, and a cylindrical member 63. The arc tube 10 and the reflector 20 are exactly the same as those in FIG.
The cylindrical member 63 is made of heat-resistant glass or the like, and is bent at an end portion of the engagement fixing portion 63a and an engagement fixing portion 63a used for positioning when the arc tube 10 is attached to the reflector 20 and fixing to the sealing portion 13a. And a narrow-diameter portion 63b that narrows toward the end. The cylindrical member 63 is inserted into the sealing portion 13a, and is fixed to a predetermined position of the sealing portion 13a with an adhesive 50 so that the central axis of the cylindrical member 63 and the central axis of the sealing portion 13a are substantially coaxial. . This predetermined position is the light emission center (electrode) of the arc tube 10 when the engagement fixing portion 63a of the tubular member 63 is engaged with the through hole taper portion 27 constituting the inner wall surface of the through hole 24 of the arc tube fixing portion 23. The positional relationship between the reflector 20 and the center of the electrode 12b and the electrode 12b is an appropriate or optimal position from the viewpoint of light utilization. The sealing portion 13 a with the cylindrical member 63 is inserted into the through hole 24 in a state where the engagement fixing portion 63 a is engaged with the through hole taper portion 27, and the arc tube fixing portion is further interposed through the adhesive 40. 23 is fixed.
3 can easily position the light emission center of the arc tube 10 and the reflector 20 by the action of the cylindrical member 63 attached to the arc tube 10 at a predetermined position. In addition, the light emission center is improved and the light utilization rate is improved. Furthermore, the lamp device 1B is also superior in that the adhesive 40 that fixes the reflector 20 and the arc tube 10 does not flow out to the reflecting surface 21.

[Lamp Device Manufacturing Method]
FIG. 4 is a flowchart showing a method of manufacturing the lamp device according to the embodiment of the present invention. An example of a method for manufacturing the lamp device 1 according to the present invention will be described with reference to FIG.
First, the cylindrical member 61 described in the first embodiment is inserted into the sealing portion 13a of the arc tube 10, and the engagement portion 61a is adjusted and fixed so as to have a predetermined positional relationship with the light emission center of the arc tube 10. (S1). The predetermined positional relationship here means that when the engaging portion 61 a is engaged with the through hole start portion edge 25 on the reflecting surface side of the arc tube fixing portion 23, the light emission center of the arc tube 10 is relative to the reflector 20. In terms of brightness and lighting, the positional relationship is an appropriate or optimal position.
For example, as shown in FIG. 5, the operation of S <b> 1 is performed using a cylindrical member holding jig 70 in which a hole 70 b having an edge 70 a corresponding to the through-hole starting portion edge 25 of the reflector 20 is formed. In this case, the engaging portion 61a of the tubular member 61 is engaged with and held by the edge 70a, and the arc tube 10 is arranged such that the distance from the edge 70a to the emission center of the arc tube 10 is the predetermined positional relationship. After the position is adjusted, the adhesive 50 is injected between the sealing portion 13a and the cylindrical member 61 to fix them together. As a method for setting the predetermined positional relationship between the edge 70a and the light emission center of the arc tube 10, for example, a CCD camera or the like can be used. That is, the through hole start portion edge 25 which is the reference position of the arc tube fixing portion 23 of the reflector 20 and the edge 70a of the cylindrical member holding jig 70 and the photographing center position of the camera are reproduced so as to reproduce the focal position of the reflector 20. The tube member 61 is fixed to the sealing portion 13a by adjusting the center between the electrodes of the arc tube 10 (light emission center) to coincide with the photographing center position of the camera.
By doing so, the tube member 61 can be fixed to a predetermined position of the sealing portion 13a while reliably grasping the light emission center of the arc tube 10, so that the operation is easy and can be fixed to an appropriate position. it can.

Subsequently, the sealing portion 13a to which the cylindrical member 61 is fixed is inserted into the through hole 24 until the engaging portion 61a is engaged with the through hole start portion edge 25 (S2), and the cylindrical member 61 is fixed to the arc tube. It is fitted and fixed to the part 23. Thereby, the lamp device 1 in which the elementary luminous tube 10 and the reflector 20 are properly positioned and fixed is completed.
According to this method, the arc tube 10 can be appropriately attached to the reflector 20 without being aware of the light emission center position of the arc tube 10 in the concave surface of the reflector 20, so that the assembly is improved and the assembly is completed. The quality of the lamp device is also improved.
In addition, it is also possible to provide a gap between the inner surface where the through hole 24 of the arc tube fixing portion 23 is formed and the outer surface of the fixing portion 61b of the tubular member 61, and to inject an adhesive there to fix both. It doesn't matter. In that case, the through hole 24 may have a cylindrical shape having the same diameter in the hole axial direction.

Next, an example of a method for manufacturing the lamp device 1A according to the present invention will be described with reference to FIG.
First, the cylindrical member 62 described in the second embodiment is inserted into the sealing portion 13a of the arc tube 10, and the engagement portion 62a is adjusted and fixed so as to have a predetermined positional relationship with the light emission center of the arc tube 10. (S1). The predetermined positional relationship here means that when the engaging portion 62a is engaged with the through-hole taper portion 26 of the arc tube fixing portion 23, the light emission center of the arc tube 10 has brightness or illumination with respect to the reflector 20A. It refers to the positional relationship that is an appropriate or optimal position from the viewpoint.
For example, as shown in FIG. 6, the operation of S1 is performed using a cylindrical member holding jig 80 in which a hole 80b having a tapered portion 80a corresponding to the through-hole tapered portion 26 of the reflector 20A is formed. In this case, the engaging portion 62a of the cylindrical member 62 is engaged with and held by the tapered portion 80a, and the arc tube so that the predetermined positional relationship is established between the tapered portion 80a and the light emission center of the arc tube 10. After the position of 10 is adjusted, the adhesive 50 is injected between the sealing portion 13a and the cylindrical member 62 to fix them together. In addition, the positioning which makes the said predetermined positional relationship between the taper part 80a and the light emission center of the arc_tube | light_emitting_tube 10 can be performed according to the method demonstrated in relation to FIG.
In this way, the tube member 62 can be fixed at a predetermined position of the sealing portion 13a while reliably grasping the light emission center of the arc tube 10, so that the operation is easy and can be fixed at an appropriate position. it can.

Subsequently, the sealing portion 13a to which the cylindrical member 62 is fixed is inserted into the through hole 24 until the engaging portion 62a engages with the through hole tapered portion 26 (S2).
Thereafter, the adhesive 40 is injected from the direction of the reflective surface 21 into 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 cylindrical member 62, and the gap is filled with the adhesive (S3).
Finally, when the injected adhesive 40 is dried (S4), the lamp device 1A in which the arc tube 10 and the reflector 20A are properly positioned and fixed is completed.
By this method, the arc tube 10 can be appropriately attached to the reflector 20A without being aware of the light emission center position of the arc tube 10 in the concave surface of the reflector 20A, so that the assembling property is improved and the assembled lamp The quality of the equipment is also improved.
Instead of using the adhesive 50, the arc tube 10 and the reflector 20A may be fixed by fitting the cylindrical member 62 into the through hole 24 as in the lamp device 1 of FIG. In that case, the cylindrical member 62 may have a shape corresponding to the through hole 24, or the through hole 24 may have a shape corresponding to the cylindrical member 62.

Furthermore, according to FIG. 4, an example of a manufacturing method of the lamp device 1B according to the present invention will be described.
First, the cylindrical member 63 described in the third embodiment is inserted into the sealing portion 13a of the arc tube 10, and the engagement fixing portion 63a is adjusted so as to have a predetermined positional relationship with the light emission center of the arc tube 10. Fix (S1). The predetermined positional relationship here means that when the engaging portion 63a is engaged with the through-hole taper portion 27 of the arc tube fixing portion 23, the light emission center of the arc tube 10 has brightness or illumination with respect to the reflector 20. It refers to the positional relationship that is an appropriate or optimal position from the viewpoint.
For example, as shown in FIG. 7, the operation of S <b> 1 is performed using a cylindrical member holding jig 90 in which a hole 90 b having a tapered portion 90 a corresponding to the through-hole tapered portion 27 of the reflector 20 is formed. In this case, the engagement fixing portion 63a of the cylindrical member 63 is engaged with and held by the taper portion 90a, and the light emission is performed so that the taper portion 90a and the light emission center of the arc tube 10 have the predetermined positional relationship. After adjusting the position of the tube 10, the adhesive 50 is injected between the sealing portion 13 a and the cylindrical member 63 to fix them together. Here again, the positioning of the predetermined positional relationship between the tapered portion 90a and the light emission center of the arc tube 10 can be performed according to the method described with reference to FIG.
In this way, the tube member 63 can be fixed at a predetermined position of the sealing portion 13a while reliably grasping the light emission center of the arc tube 10, so that the operation is easy and can be fixed at an appropriate position. it can.

Subsequently, the sealing portion 13a to which the cylindrical member 63 is fixed is inserted into the through hole 24 until the engagement fixing portion 63a is engaged with the through hole taper portion 27 (S2).
Thereafter, the adhesive 40 is injected into 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 cylindrical member 63 from the opposite direction to the reflecting surface 21, and the gap is filled with the adhesive (S3). ).
Finally, when the injected adhesive 40 is dried (S4), the lamp device 1B in which the arc tube 10 and the reflector 20 are properly positioned and fixed is completed.
By this method, the arc tube 10 can be appropriately attached to the reflector 20 without being aware of the light emission center position of the arc tube 10 in the concave surface of the reflector 20, so that the assemblability is improved and the assembled lamp The quality of the equipment is also improved. Further, in this method, it is possible to prevent the adhesive 40 that fixes the reflector 20 and the arc tube 10 from flowing out to the reflecting surface 21.

  By the way, as the adhesive 40 for fixing the arc tube 10 to the reflectors 20 and 20A and the adhesive 50 for fixing the cylindrical members 61, 62, 63 to the arc tube 10, silica-based or alumina-based inorganic adhesives are used. An agent can be used. As a specific product of such an adhesive, for example, there is Sumiceram (Sumicellum: registered trademark of Sumitomo Chemical Co., Ltd.).

〔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 substantially uniformly illuminating the image forming regions of the liquid crystal panels 410R, 410G, and 410B. The illumination optical system 300 includes the lamp device described in the first to third embodiments, in this case, 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 the lamp device 1 according to the present invention, light leaking in the direction opposite to the reflecting surface side from the end of the sealing portion 13a of the arc tube 10 fixed to the reflecting mirror 20 is blocked by the adhesive 40. Therefore, effects such as avoiding adverse effects on the components arranged at the rear portion of the lamp device 1 can be obtained. In this case, since it is not necessary to arrange a special light-shielding component at the rear part of the lamp device 1, it is excellent in that the quality of the projector 100 can be improved while reducing the number of components and the cost of the projector 100.

The projector 100 according to 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 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. is there.
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 the lamp device which concerns on Embodiment 2 of this invention. Sectional drawing which shows the lamp device which concerns on Embodiment 3 of this invention. The flowchart which shows the manufacturing method of the lamp device which concerns on embodiment of this invention. Explanatory drawing which shows the process of attaching a cylindrical member to the sealing part of the arc tube of FIG. Explanatory drawing which shows the process of attaching a cylindrical member to the sealing part of the arc tube of FIG. Explanatory drawing which shows the process of attaching a cylindrical member to the sealing part of the arc tube of FIG. 1 is a configuration diagram of a projector according to an embodiment of the invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,1A, 1B ... Lamp apparatus, 10 ... Arc tube, 11 ... Bulb part, 12a, 12b ... Electrode, 13a, 13b ... Sealing part, 14a, 14b ... Metal foil, 15a, 15b ... Lead, 20, 20A ... Reflector, 21 ... concave reflecting surface, 22 ... base material, 23 ... arc tube fixing part, 24 ... through hole, 25 ... through hole start part edge, 26, 27 ... through hole taper part, 40 ... adhesive, 50 ... Adhesive, 61 ... cylindrical member, 61a ... cylindrical member engaging portion, 61b ... cylindrical member fixing portion, 62 ... cylindrical member, 62a ... cylindrical member engaging portion, 62b ... cylindrical member fixing portion, 63 ... cylindrical member 63a, a cylindrical member engaging and fixing portion, 63a, a narrow diameter portion of the cylindrical member, 400R, 400G, 400B, a liquid crystal panel, 600, a projection lens.

Claims (7)

A bulb portion in which an electrode is built in a reflector having a concave reflecting surface and an arc tube fixing portion extending in the center portion of the reflecting surface opposite to the reflecting surface and having a through hole formed therein, and the bulb portion A manufacturing method of a lamp device to which an arc tube having a pair of sealing portions formed continuously from and sealed with a conductor conducting to the electrode is attached,
A cylindrical member that is engaged with the edge of the through hole start portion on the reflective surface side of the arc tube fixing portion and is used for positioning with the reflector is inserted into one of the sealing portions and engaged with the reflector. A step of fixing the portion so as to have a predetermined positional relationship with the light emission center of the arc tube;
Inserting the sealing portion with the cylindrical member into the through-hole until the cylindrical member engages with the edge, and fixing the sealing portion to the arc tube fixing portion;
The manufacturing method of the lamp device characterized by the above-mentioned. A bulb portion in which an electrode is built in a reflector having a concave reflecting surface and an arc tube fixing portion extending in the center portion of the reflecting surface opposite to the reflecting surface and having a through hole formed therein, and the bulb portion A manufacturing method of a lamp device to which an arc tube having a pair of sealing portions formed continuously from and sealed with a conductor conducting to the electrode is attached,
A cylindrical member that engages with a through hole taper portion that forms an inner wall surface of the through hole of the arc tube fixing portion and is used for positioning with the reflector is inserted into one of the sealing portions, and is engaged with the reflector. Fixing the joint portion so as to have a predetermined positional relationship with the light emission center of the arc tube;
Inserting the sealing portion with the cylindrical member into the through-hole until the cylindrical member engages with the tapered portion, and fixing the sealing portion to the arc tube fixing portion;
The manufacturing method of the lamp device characterized by the above-mentioned.   The method of manufacturing a lamp device according to claim 1, wherein the cylindrical member is fixed to the arc tube fixing portion by fitting with the through hole.   The said cylindrical member is manufactured by the shaping | molding die, The engagement surface with the said reflector was made into the contact surface with the said shaping | molding die, The Claim 1 thru | or 3 characterized by the above-mentioned. The manufacturing method of the lamp device as described. 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 surface and having a through hole formed therein, a bulb portion having an electrode built therein, and the bulb portion An arc tube having a pair of sealing portions formed continuously from and sealed with a conductor conducting to the electrode;
A cylindrical member is inserted into one of the sealing portions and fixed in place,
The sealing portion with the cylindrical member is inserted into the through hole of the reflector, and the outer surface of the cylindrical member is engaged with and fixed to the through hole start portion edge on the reflecting surface side of the arc tube fixing portion. A lamp device characterized by that. 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 surface and having a through hole formed therein, a bulb portion having an electrode built therein, and the bulb portion An arc tube having a pair of sealing portions formed continuously from and sealed with a conductor conducting to the electrode;
A cylindrical member is inserted into one of the sealing portions and fixed in place,
The sealing portion with the cylindrical member is inserted into the through hole of the reflector, and the outer surface of the cylindrical member is engaged with and fixed to the through hole taper portion constituting the through hole inner wall surface of the arc tube fixing portion. A lamp device characterized by being made.   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 described lamp device.

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