JP4144489B2 - LIGHTING DEVICE AND PROJECTOR HAVING THE LIGHTING DEVICE - Google Patents

Description

  The present invention relates to an illumination device and a project including the illumination device.

A lighting device in which a light-emitting lamp having a bulb portion in which a light-emitting electrode is incorporated and a sealing portion in which a conductor connected to the light-emitting electrode is formed on both sides of the bulb and connected to the light-emitting electrode is combined with a reflecting mirror Has been used in the past. And in the case of an illuminating device in which the electrode direction and the axial direction of the light emitting lamp are arranged on the optical axis of the elliptical reflecting mirror, the lead wire that supplies power to the conductor of the sealing portion located on the reflection side of the elliptical reflecting mirror Has been conventionally wired so as to be drawn out of the reflection region of the reflecting mirror across the vicinity of the condensing point of the elliptical reflecting mirror from the tip of the sealing portion (for example, Patent Document 1).
Japanese Patent Laid-Open No. 11-65002 (7th page, FIG. 1)

However, if this lead wire is a wiring that crosses the vicinity of the condensing point of the elliptical reflector and leads out of the reflective area of the elliptical reflector, the lead wire diameter is smaller than the reflected light beam cross section of the elliptical reflector. Since it is relatively large, much light emitted from the elliptical reflecting mirror is blocked.
The present invention has been made in view of the above problems, and an illumination device that reduces a blocking amount of illumination light caused by a lead wire that supplies power to a conductor of a sealing portion on a reflection side of an elliptical reflector, and An object of the present invention is to provide a projector equipped with the same.

A lighting device according to the present invention includes a light emitting lamp having a bulb portion in which a light emitting electrode is incorporated, and a sealing portion that is formed integrally with the bulb portion on both sides of the bulb portion and a conductor connected to the electrode is disposed. An elliptical reflecting mirror that reflects light from the light emitting lamp in one direction, the light emitting lamp is fixed on the optical axis of the elliptical reflecting mirror, and the tip of one side of the sealing portion is the elliptical reflecting mirror In the lighting device located on the reflective surface side, a lead wire for supplying electric power to the conductor on one side of the sealing portion is connected to the bulb from the tip portion on one side of the sealing portion along the sealing portion. It is drawn back to the part side, and further, it is drawn out from the tip of the retracted position toward the front side from the tip of the reflection effective area of the elliptical reflector and wired.
In the case of this illumination device, the diameter of the lead wire with respect to the cross section of the reflected light beam from the elliptical reflector is relative to that when the lead wire is drawn directly out of the reflection area across the vicinity of the condensing point of the elliptical reflector. Thus, the amount of reflected light from the elliptical reflecting mirror is reduced.

  In the lighting device, it is preferable that the lead wire is pulled back to the vicinity of the bulb portion along the sealing portion. In this case, the relative diameter of the lead wire is further reduced, and the amount of light reflected from the elliptical reflecting mirror caused by the lead wire is further reduced.

  Further, in the above lighting device, the light emitting lamp is provided with a sub-reflecting mirror that returns the light emitted from the bulb part to the bulb part again on one side of the sealing part. It is pulled back to the vicinity of the sub-reflecting mirror along the part. Also in this case, the diameter of the lead wire with respect to the cross section of the reflected light beam from the elliptical reflector is relative to that when the lead wire is drawn directly out of the reflection region across the vicinity of the condensing point of the elliptical reflector. And the amount of light reflected from the elliptical reflecting mirror is reduced.

  In the illumination device, a lead wire drawn forward from the tip of the effective reflection area of the elliptical reflector is drawn toward the tip of the elliptical reflector or the periphery thereof. To do. By doing in this way, the reduction | decrease of the interruption | blocking amount of the light reflected from the elliptical reflective mirror mentioned above is ensured reliably.

  Furthermore, the illumination device further includes a housing for mounting the elliptical reflecting mirror to which the light-emitting lamp is fixed, and a lead wire drawn forward from a tip of a reflection effective area of the elliptical reflecting mirror is the elliptical reflecting It is pulled out toward the housing | casing of the front-end | tip part of a mirror or this front-end | tip part, It is characterized by the above-mentioned. This also ensures a reduction in the amount of light that is reflected from the above-described elliptical reflecting mirror.

  The projector according to the present invention is characterized in that in the projector for projecting the image by generating the image by inputting the illumination light from the illumination device into the light modulation device, any one of the above illumination devices is provided as the illumination device. To do. Thereby, the illumination efficiency of the projector is improved and the luminance of the image is improved.

Embodiment 1
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, in each following figure, the same code | symbol shall show the same thing or an equivalent. FIG. 1 is a configuration diagram of a lighting apparatus 100 according to Embodiment 1 of the present invention. The light emitting lamp 10 has a substantially spherical bulb portion 2 in which a pair of discharge electrodes 1 are built. And the valve part 2 is integrated with the valve part 2 on both sides, and the sealing part 3 extended from the valve part 2 to the left and right sides is provided. The valve part 2 and the sealing part 3 are integrally formed of a transparent material such as quartz glass. Conductors 4 connected to the respective electrodes 1 are disposed inside the sealing portion 3, and lead wires 6 connected to the conductors 4 extend from the end of the sealing portion 3 to the outside. As shown in FIG. 1, a lead terminal 5 or the like may be provided between the conductor 4 and the lead wire 6. Examples of such a light emitting lamp 10 include a mercury lamp, a xenon lamp, and a metal haloid lamp.

  The elliptical reflecting mirror 20 is a reflecting surface formed by forming a reflecting film on the inner surface of a spheroidal substrate. The effective reflecting film area is referred to as a reflecting effective area. The illuminating device 100 according to Embodiment 1 of the present invention is obtained by assembling the light emitting lamp 10 to the elliptical reflecting mirror 20. The elliptical reflecting mirror 20 and the light emitting lamp 10 are assembled as follows, for example. That is, the optical axis center of the elliptical reflecting mirror 20 and the axial center of the light emitting lamp 10 are made to coincide with each other, and the centers of the pair of electrodes 1 of the light emitting lamp 10 are positioned at the first focal point of the elliptical reflecting mirror 20. Then, the light emitting lamp 10 is inserted into the hole 21 at the center of the bottom of the elliptical reflecting mirror 20, and the elliptical reflecting mirror 20 and the light emitting lamp 10 are fixed using the adhesive 22. The light irradiation area of the illumination device 100 is indicated by hatching for reference. In addition, 20a in a figure shows the front-end | tip of the reflective effective area | region of this elliptical reflective mirror 20. FIG.

  The lead wire 6 coming out from the lead terminal 5 at the tip of the sealing portion 3 of the light-emitting lamp 10 located on the reflecting surface side of the elliptical reflecting mirror 20 once faces the bulb portion 2 side along the sealing portion 3 and is sealed. From the midway position between the tip of the stop 3 and the bulb 2, it is drawn forward (or forward) from the effective reflection region tip 20 a of the elliptical reflector 20, that is, as shown by 6 A or 6 B in the figure. Wired. In this case, for example, as shown as 6A, when the lead wire 6 is pulled back to the vicinity of the bulb portion 2 as much as possible and the wiring is drawn forward from the reflection effective region tip 20a of the elliptical reflecting mirror 20 from the position, the elliptical type The diameter of the lead wire 6 relative to the cross section of the reflected light beam from the reflecting mirror 20 can be made relatively smaller. In addition, the lead wire 6 heading forward from the effective reflection region tip 20a of the elliptical reflecting mirror 20 from the sealing portion 3 side is in the vicinity of the effective reflection region tip 20a of the elliptical reflecting mirror 20, and at the front end of the elliptical reflecting mirror 20. Or it is preferable to pull out toward the periphery. In FIG. 1, a lead wire lead guide 23 for supporting or penetrating the lead wire 6 is provided at the tip of the elliptical reflecting mirror 20, and the lead wire 6 is drawn from the sealing portion 3 side toward the lead wire lead guide 23. Yes.

Embodiment 2
FIG. 2 is a configuration diagram of an illuminating device 100A according to Embodiment 2 of the present invention. The light-emitting lamp 10A with the sub-reflecting mirror 7 used here has a sub-reflecting mirror (or second reflecting mirror) 7 for returning the light emitted from the bulb 2 to the bulb 2 again with respect to the light-emitting lamp 10. The elliptical reflecting mirror 20 and the reflecting surface are opposed to each other and are attached in the vicinity of the bulb portion 2 on one side of the sealing portion 3, and the other points are the same as those of the light emitting lamp 10. Since the sub-reflecting mirror 7 is exposed to high heat, it is made of quartz, crystallized glass or translucent alumina having high heat resistance.

  The elliptical reflecting mirror 20 is a reflecting surface formed by forming a reflecting film on the inner surface of a substrate having a spheroidal shape, but the sub-reflecting mirror 7 is provided in the vicinity of the bulb portion 2. Accordingly, the effective reflection area of the elliptical reflecting mirror 20 can be reduced. The illumination device 100A according to Embodiment 2 of the present invention is obtained by assembling the elliptical reflecting mirror 20 and the light emitting lamp 10A in the same manner as in FIG. The light irradiation area of the illumination device 100A is displayed by hatching for reference. In addition, 20b in a figure has shown the front-end | tip of the reflective effective area | region of this elliptical reflective mirror 20. FIG. In addition, most of the light that is emitted from the bulb portion 2 and then returned to the bulb portion 2 by the sub-reflecting mirror 7 enters this oblique line for use.

  The lead wire 6 coming out from the lead terminal 5 at the tip of the sealing portion 3 of the light emitting lamp 10A located on the reflecting surface side of the elliptical reflecting mirror 20 once faces the bulb portion 2 side along the sealing portion 3 and is sealed. From the midway position between the distal end portion of the stop portion 3 and the bulb portion 2, it is drawn forward (or forward) from the distal end 20b of the effective reflecting area of the elliptical reflecting mirror 20, that is, as indicated by 6A or 6B in the figure. Wired. In this case, for example, as shown as 6A, when the lead wire 6 is pulled back as close as possible to the sub-reflecting mirror 7 and is drawn from the position toward the front from the reflection effective region tip 20b of the elliptical reflecting mirror 20, The diameter of the lead wire 6 with respect to the cross section of the reflected light beam from the mold reflecting mirror 20 can be made relatively smaller. Note that the lead wire 6 heading forward from the effective reflection region tip 20b of the elliptical reflecting mirror 20 from the sealing portion 3 side is in the vicinity of the effective reflection region tip 20b of the elliptical reflecting mirror 20, and at the front end of the elliptical reflecting mirror 20. Or it is preferable to pull out toward the periphery. In FIG. 2, a lead wire lead guide 23 for supporting or penetrating the lead wire 6 is provided at the tip of the elliptical reflecting mirror 20, and the lead wire 6 is drawn from the sealing portion 3 side toward the lead wire lead guide 23. Yes.

Embodiment 3
Next, a description will be given of an example of wiring of lead wires in a housing portion when the lighting device as described in Embodiment 1 or Embodiment 2 is further attached to the housing. FIG. 3 is a side sectional view of an illuminating device 100B according to Embodiment 3 of the present invention, and FIGS. 4 to 6 are plan sectional views showing wiring examples of lead wires 6 in the illuminating device 100B. The illumination device 100B here includes an elliptical reflecting mirror 20 to which the light-emitting lamp 10A is fixed and a housing 30 to which the elliptical reflecting mirror 20 is attached and fixed.

  As shown in FIG. 3, the housing 30 holds an upper surface portion around the tip of the elliptical reflecting mirror 20 to which the light-emitting lamp 10A is fixed, and supports the vertical surface portion, and the lighting device 100B. And a pedestal for fixing the device to the device itself. The elliptical reflecting mirror 20 is held and fixed by the outer peripheral portion 31 of the vertical surface portion, and an opening 32 through which reflected light from the elliptical reflecting mirror 20 passes is formed at the central portion of the vertical surface portion.

Wiring example 1
FIG. 4 is a cross-sectional plan view of FIG. Here, the lead wire 6 of the sealing part 3 whose tip is located on the reflection surface side of the elliptical reflecting mirror 20 is connected from the lead terminal 5 at the tip of the sealing part 3 along the sealing part 3. Return to the vicinity of the mounting portion of the reflecting mirror 7, and draw from the position toward the lead wire extraction hole 24 provided further on the tip side (or front side) than the tip (not shown) of the reflection effective area of the elliptical reflecting mirror 20. Yes. Further, here, the lead wire 6 is further connected to, for example, a lead terminal 25 attached to the back surface of the elliptical reflecting mirror 20, and the lead terminal 25 is provided on the housing 30 for connection to an external device. It is connected to the base 34 via a covered cable 33. Similarly, the lead wire 6 corresponding to the sealing portion 3 whose tip is located on the opposite side of the reflecting surface of the elliptical reflecting mirror 20 is also connected to the terminal block 34 using the covered cable 33. . Further, in this example, as shown in the figure, the trigger wire 8 as an auxiliary electrode that makes it easier to start the discharge of the light-emitting lamp 10A extends from the lead terminal 5 over one sealing portion 3 and the bulb portion 2 to the other. It extends to the vicinity of the boundary between the sealing part 3 and the valve part 2.

Example 2 of lead wire wiring
FIG. 5 is a cross-sectional plan view of FIG. Here, the lead wire 6 of the sealing part 3 whose tip is located on the reflection surface side of the elliptical reflecting mirror 20 is connected from the lead terminal 5 at the tip of the sealing part 3 along the sealing part 3. Return to the vicinity of the mounting portion of the reflecting mirror 7, and from that position further to the tip side (or front side) than the tip (not shown) of the reflection effective area of the elliptical reflecting mirror 20, and adjacent to the tip of the elliptical reflecting mirror 20. It is pulled out toward the outer peripheral portion 31 of the housing vertical surface portion. Further, here, the lead wire 6 is further connected to a terminal block 34 provided on the housing 30 for connection to an external device via the outer peripheral portion 31 and via the covered cable 33, for example. Similarly, the lead wire 6 corresponding to the sealing portion 3 whose tip is located on the opposite side of the reflecting surface of the elliptical reflecting mirror 20 is also connected to the terminal block 34 using the covered cable 33. . In this case as well, the trigger wire 8 serving as an auxiliary electrode that makes it easier to start the discharge of the light emitting lamp 10A extends from the lead terminal 5 beyond the one sealing portion 3 and the bulb portion 2 to the other sealing portion. 3 and the valve portion 2 are extended to the vicinity of the boundary.

Example 3 of lead wire wiring
FIG. 6 is a plan sectional view of FIG. 3 showing a third example of wiring of the lead wire 6. Here, the lead wire 6 of the sealing portion 3 on the side where the tip is located on the reflection surface side of the elliptical reflecting mirror 20 is extended from the lead terminal 5 at the tip of the sealing portion 3 along the sealing portion 3. The housing 30 is returned to the vicinity of the front surface corresponding portion of the vertical surface portion of the housing 30, and the vertical surface portion of the elliptical reflecting mirror 20 from the position is further on the front side (front side) than the front end (not shown) of the reflection effective region. It is pulled out toward the outer peripheral portion 31 of the. And here, after connecting the lead wire 6 to, for example, the lead terminal 25 provided on the outer peripheral portion 31, the covered cable 33 is attached to the terminal block 34 provided on the housing 30 for connection with an external device. Connected through. Similarly, the lead wire 6 corresponding to the sealing portion 3 whose tip is located on the opposite side of the reflecting surface of the elliptical reflecting mirror 20 is also connected to the terminal block 34 with the covered cable 33. The trigger line 8 is the same as that shown in FIGS.

  The illuminating device 100B having the above configuration has substantially the same lighting effect as described in the second embodiment. That is, the outgoing light from the region not covered by the sub-reflecting mirror 7 of the bulb portion 2 is reflected by the elliptical reflecting mirror 20 and travels forward of the illumination device 100B. Further, the light emitted from the region covered by the sub-reflecting mirror 7 of the bulb portion 2 is reflected by the sub-reflecting mirror 7 and returns to the bulb portion 2 again, from which it enters the elliptical reflecting mirror 20 and is reflected. , Heading forward of the lighting device 100B. At that time, since the diameter of the lead wire 6 with respect to the cross section of the reflected light beam of the elliptical reflecting mirror 20 is relatively small as compared with the conventional case, the amount of blocking the reflected light by the lead wire 6 is reduced, and the illumination efficiency is improved. .

  By the way, in Embodiment 3, the lead wire in the attachment housing | casing part of the illuminating device corresponding to Embodiment 2 comprised using the light emitting lamp 10A provided with the sub-reflection mirror 7, the elliptical reflection mirror 20, and the housing | casing 30. Wiring explained. However, even when the lighting device corresponding to the first embodiment configured using the light emitting lamp 10 without the sub-reflecting mirror 7, the elliptical reflecting mirror 20, the casing 30, and the like is used, The wiring can be configured as shown in FIG. 4, FIG. 5, or FIG.

  FIG. 7 is a side sectional view of the lighting apparatus according to the third embodiment having an explosion-proof structure. Here, an explosion-proof structure 40 is disposed on the front surface of the elliptical reflecting mirror 20, and a concave lens 50 that collimates the reflected light from the elliptical reflecting mirror 20 is disposed at the light outlet of the explosion-proof structure 40. The elliptical reflecting mirror 20, the explosion-proof structure 40, and the concave lens 50 form an explosion-proof structure for the light emitting lamp 10A. The explosion-proof structure may be a structure that cools the interior by providing an opening 41 with a mesh for allowing cooling air to flow, instead of a completely sealed structure. FIG. 8 is a plan sectional view showing an example of the wiring of the lead wire 6 of the lighting device of FIG. 7. Here, the wiring shown in FIG. 6 is applied between the elliptical reflector 20 and the explosion-proof structure 40. The lead wire 6 is pulled out from the provided gap or hole. Further, FIG. 9 is a side sectional view of the lighting device according to Embodiment 3 having another explosion-proof structure, and FIG. 10 is a plan sectional view showing a wiring example of the lead wire 6 of the lighting device of FIG. The configuration of FIGS. 9 and 10 is the same as the configuration of FIGS. 7 and 8 except that the concave lens 50 constituting the explosion-proof structure is replaced with a flat glass 60.

  The lighting devices 100, 100A, and 100B of the first to third embodiments can be used as lighting devices for various devices. Below, the example which utilizes them for a projector is demonstrated. FIG. 11 is a configuration diagram of a projector including the illumination device 100B. This optical system includes an illuminating device 100B including a light emitting lamp 10A having a second reflecting mirror 7 as a sub-reflecting mirror and a first reflecting mirror 20 as an elliptical reflecting mirror, and light emitted from the illuminating device 100B. An illumination optical system 300 having means for adjusting to predetermined light, a color light separation optical system 380 having dichroic mirrors 382 and 386, a reflection mirror 384, and the like, an incident side lens 392, a relay lens 396, and reflection mirrors 394 and 398. A relay optical system 390, field lenses 400, 402, 404 corresponding to each color light, and liquid crystal panels 410R, 410G, 410B as light modulation devices, a cross dichroic prism 420 which is a color light combining optical system, and a projection lens 600. And.

  Next, the operation of the projector having the above configuration will be described. First, the emitted light from the rear side of the center of the bulb portion 2 of the light-emitting lamp 10A is reflected by the first reflecting mirror 20 and travels forward of the illumination device 100B. Also, the outgoing light from the front side of the center of the bulb portion 2 is reflected by the second reflecting mirror 7 and returns to the first reflecting mirror 20, and then reflected by the first reflecting mirror 20 and heads forward of the illumination device 100B. .

  The light exiting the illumination device 100B enters the concave lens 200, where the traveling direction of the light is adjusted substantially parallel to the optical axis 1 of the illumination optical system 300, and then each small lens of the first lens array 320 constituting the integrator lens. 321 is incident. The first lens array 320 divides incident light into a plurality of partial light beams corresponding to the number of small lenses 321. Each partial light beam exiting the first lens array 320 is incident on a second lens array 340 constituting an integrator lens having small lenses 341 respectively corresponding to the small lenses 321. Then, the emitted light from the second lens array 340 is condensed in the vicinity of the corresponding polarization separation film (not shown) of the polarization conversion element array 360. At this time, light is adjusted by a light shielding plate (not shown) so that light is incident only on a portion corresponding to the polarization separation film in the incident light to the polarization conversion element array 360.

  In the polarization conversion element array 360, the light beam incident thereon is converted into the same type of linearly polarized light. Then, a 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 that irradiate the liquid crystal panels 410R, 410G, and 410B overlap on the corresponding panel surface. Adjusted to fit.

  The color light separation optical system 380 includes first and second dichroic mirrors 382 and 386, and has a function of separating light emitted from the illumination optical system into red, green, and blue color light. The first dichroic mirror 382 transmits the red light component of the light emitted from the superimposing lens 370 and reflects the blue light component and the green light component. The red light transmitted through the first dichroic mirror 382 is reflected by the reflection mirror 384, passes through the field lens 400, and reaches the liquid crystal panel 410R for red light. The field lens 400 converts each partial light beam emitted from the superimposing lens 370 into a light beam parallel to the central axis (principal ray). The field lenses 402 and 404 provided in front of the other liquid crystal panels 410G and 410B operate in the same manner.

  Further, of the blue light and green light reflected by the first dichroic mirror 382, the green light is reflected by the second dichroic mirror 386 and reaches the green light liquid crystal panel 410 </ b> G through the field lens 402. On the other hand, the blue light passes through the second dichroic mirror 386, passes through the relay optical system 390, that is, 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 404. The light reaches the light liquid crystal panel 410B. The reason why the relay optical system 390 is used for blue light is to prevent a decrease in light use efficiency due to light divergence or the like because the optical path length of blue light is longer than the optical path length of other color lights. is there. That is, this is to transmit the partial light beam incident on the incident side lens 392 to the field lens 404 as it is. The relay optical system 390 is configured to pass blue light out of the three color lights, but may be configured to pass other color light such as red light.

  The three liquid crystal panels 410R, 410G, and 410B modulate each incident color light according to the given video information to form an image of each color light. A polarizing plate is usually provided on the light incident surface side and the light emitting surface side of the three liquid crystal panels 410R, 410G, and 410B.

  The three colors of modulated light emitted from each of the liquid crystal panels 410R, 410G, and 410B enter a cross dichroic prism 420 having a function 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. These dielectric multilayer films combine the three colors of red, green, and blue modulated light to form combined light for projecting a color image. The synthesized light synthesized by the cross dichroic prism 420 finally enters the projection lens 600 and is projected and displayed as a color image on the screen.

  According to the projector, since the illumination light utilization rate is improved by the illumination device 100B, the brightness of the projected image is improved.

  The illumination device of the present invention can be used as an illumination device incorporated in various optical devices such as a projector.

The block diagram of the illuminating device which concerns on Embodiment 1 of this invention. The block diagram of the illuminating device which concerns on Embodiment 2 of this invention. The sectional side view of the illuminating device which concerns on Embodiment 3 of this invention. FIG. 4 is a cross-sectional plan view of FIG. 3 showing a lead wiring example 1; FIG. 4 is a cross-sectional plan view of FIG. FIG. 4 is a cross-sectional plan view of FIG. 3 showing a third example of wiring of lead wires. The sectional side view of the illuminating device which concerns on Embodiment 3 provided with the explosion-proof structure. FIG. 8 is a cross-sectional plan view illustrating a wiring example of lead wires of the lighting device of FIG. 7. The sectional side view of the illuminating device which concerns on Embodiment 3 provided with another explosion-proof structure. FIG. 10 is a cross-sectional plan view illustrating an example of wiring of lead wires of the illumination device of FIG. 9. The block diagram which shows the optical system of the projector provided with the illuminating device of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Electrode, 2 ... Valve | bulb part, 3 ... Sealing part, 4 ... Conductor, 5 ... Lead terminal, 6, 6A, 6B ... Lead wire, 7 ... Subreflective mirror (2nd reflective mirror), 8 ... Trigger wire, DESCRIPTION OF SYMBOLS 10 ... Light-emitting lamp, 10A ... Light-emitting lamp with a subreflector, 20 ... Elliptical reflector (1st reflector), 20a, 20b ... Reflection effective area | region tip, 23 ... Lead wire extraction guide, 24 ... Lead wire extraction hole, 25 ... Lead terminal, 30 ... Housing, 31 ... Holding part, 32 ... Opening part, 33 ... Covered cable, 34 ... Terminal block, 40 ... Explosion-proof structure, 50 ... Concave lens, 60 ... Flat glass, 100, 100A, 100B ... lighting device.

Claims (6)

A light-emitting lamp having a bulb portion with a built-in light-emitting electrode, and a sealing portion formed on both sides of the bulb portion, which is integrally formed with the bulb portion and provided with a conductor connected to the electrode, and light from the light-emitting lamp An elliptical reflecting mirror that reflects in one direction, the light-emitting lamp is fixed on the optical axis of the elliptical reflecting mirror, and one end of the sealing portion is located on the reflecting surface side of the elliptical reflecting mirror. In the lighting device
A lead wire for supplying power to the conductor on one side of the sealing portion is pulled back from the tip portion on one side of the sealing portion to the valve portion side along the sealing portion, and further from the position where the lead is pulled back. An illuminating device, wherein the illuminating device is drawn and wired forward from a tip of a reflection effective area of the elliptical reflector.   The lighting device according to claim 1, wherein the lead wire is pulled back to the vicinity of the bulb portion along the sealing portion.   The light emitting lamp has a sub-reflecting mirror attached to one side of the sealing portion for returning the light emitted from the bulb portion back to the bulb portion, and the lead wire extends along the sealing portion. 2. The illumination device according to claim 1, wherein the illumination device is pulled back to the vicinity of the mirror.   4. The lead wire drawn forward from the tip of the effective reflection area of the elliptical reflector is drawn toward the tip of the elliptical reflector or the periphery thereof. The lighting apparatus in any one.   A housing for mounting the elliptical reflecting mirror to which the light-emitting lamp is fixed, and a lead wire drawn forward from a tip of a reflection effective area of the elliptical reflecting mirror is a tip of the elliptical reflecting mirror or the tip The lighting device according to claim 1, wherein the lighting device is pulled out toward the housing around a portion.   6. A projector for projecting an image by generating illumination light from an illumination device incident on a light modulation device, comprising the illumination device according to claim 1 as the illumination device. Projector.

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