JP2002350976A - Light source device and optical equipment using this light source device - Google Patents

Abstract

(57) [Summary] (Modifications) [Problem] Even if a light source lamp ruptures, debris is not scattered to the outside and efficiently cooled to extend the life of the light source lamp. , A light source device, and an optical device. A light-emitting surface of a reflector is a transparent plate.
01 and the transparent plate 501 and the reflector 41
The discharge side opening 503, which is a pair of openings symmetrically arranged about the optical axis of the reflector 412, is provided on the contact surface 2.
And a supply-side opening 504 are formed.
Cooling air is supplied to the supply-side opening 504 and the cooling air that is discharged from the discharge-side opening 503 is guided to the back side of the reflector 412. A discharge-side cooling channel opening / closing unit 505 and a supply-side cooling channel opening / closing unit that block the cooling channel when the device is removed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical device comprising a light source lamp, a reflector for aligning and emitting light rays emitted from the light source lamp, and a housing for accommodating the light source lamp and the reflector. The present invention relates to a light source device used as a light source and an optical device using the light source device.

[0002]

2. Description of the Related Art Hitherto, an optical device that modulates a light beam emitted from a light source lamp in accordance with image information to form an optical image and enlarges and projects the optical image, that is, a so-called projector has been used. Such optical devices are widely used for multimedia presentations at conferences, conferences, exhibitions, and the like. For this reason, in order to enable a projection image to be sharpened by an optical device, an increase in luminance of a light source lamp is promoted.

Here, as a light source lamp, a high-pressure mercury lamp or a metal halide lamp is used, and when its life is over, an arc tube made of quartz glass may burst and fragments may be scattered. For this reason, in the light source device including this light source lamp, the light-emitting surface of the reflector is covered with a transparent glass plate or the like, so that the fragments are not scattered even if the light source lamp ruptures.

[0004]

However, in the above-described light source device, the light source lamp is likely to be heated to a high temperature because the light source lamp is sealed in the space formed by the reflector and the transparent glass plate. There is a problem that the life is shortened. Also, the temperature of the electrode provided behind the light source lamp is likely to be high, which also shortens the life of the light source lamp.
On the other hand, a structure in which an opening for introducing cooling air is formed in a part of the reflector and the transparent glass plate to cool the arc tube can be considered.
It is difficult to make a structure that does not completely scatter the fragments.

[0005] It is an object of the present invention to provide a light source device which does not scatter fragments to the outside even if the light source lamp ruptures, and which can be efficiently cooled to extend the life of the light source lamp. And optical equipment.

[0006]

In order to achieve the above object, a light source device according to the present invention comprises a light source lamp, a reflector for aligning and radiating light rays emitted from the light source lamp,
A light source device used as a light source of an optical device, comprising: a light source lamp and a housing for housing the reflector, wherein a light exit surface of the reflector is covered with a transparent plate, and the light emitting surface of the transparent plate and the reflector is The contact surface is formed with a pair of openings symmetrically arranged around the optical axis of the reflector, and the housing supplies cooling air to one of the pair of openings, A cooling channel for guiding cooling air discharged from the opening to the back side of the reflector, the cooling channel is opened when the optical device is mounted on the optical device, and the cooling channel is removed when the optical device is removed from the optical device. And a cooling channel opening / closing part for closing.

Here, the pair of openings may be formed by cutting out a part of the transparent plate, but may be formed as a recess formed by cutting out a part of a front end edge of the reflector in the light emitting direction. Is preferred. This is because cooling air can flow in a direction perpendicular to the optical axis of the reflector, and the light source lamp can be efficiently cooled. Further, the housing for housing the light source lamp and the reflector is arranged in the optical axis direction of the emitted light beam, and in a direction orthogonal to the optical axis.
It refers to a housing having a positioning surface for positioning the light source lamp and the reflector. For example, the housing can be configured as a plastic molded product by injection molding or the like.

According to the present invention, since the cooling passage for guiding the cooling air to the rear side of the reflector through the pair of openings is provided in the housing, the reflector and the light source lamp can be efficiently used. Cooling can extend the life of the light source lamp. In addition, the electrode of the light source lamp is usually located on the back side of the reflector, and this electrode easily generates heat. Cooling air flows through this portion to efficiently cool the electrode. The life of the lamp can be extended. In addition, since the cooling channel opening / closing part that closes the cooling channel when detached from the optical device is provided, even if the luminous tube of the light source lamp ruptures during use of the optical device, the luminous tube is replaced when the light source device is replaced. Debris does not scatter outside. On the other hand, when the optical device is mounted, since the cooling channel opening / closing portion is configured to open the cooling channel, the cooling efficiency of the light source lamp is not impaired.

In the light source device according to the present invention, it is preferable that a rectifying plate for flowing cooling air discharged from the other opening to the rear side of the reflector is provided in the cooling channel. According to this configuration, since the rectifying plate is provided in the cooling channel, the rectifying plate can positively flow the cooling air discharged from the other opening to the rear side of the reflector. The electrode of the light source lamp located on the back side of the reflector can be efficiently cooled.

In the light source device according to the present invention, the housing includes a supply opening for supplying cooling air to the one opening, and cooling air discharged from the other opening to the outside of the housing. A discharge-side opening for discharging, the cooling passage opening and closing unit includes a supply-side lid member that opens and closes the supply-side opening, and a discharge-side lid member that opens and closes the discharge-side opening, It is preferable that the discharge side lid member also serves as the current plate.

With this configuration, since the housing has the supply-side opening and the discharge-side opening, the supply-side opening supplies cooling air to one of the openings from outside the housing and discharges the cooling air. Since the side opening discharges the cooling air to the outside of the housing through the other opening, the light source lamp can be efficiently cooled using the air outside the housing of the light source device. Also,
Since the cooling channel opening / closing portion includes the supply-side lid member and the discharge-side lid member, the cooling channel opening / closing portion can be configured with a simple structure of the lid member, so that the structure of the light source device having the explosion-proof structure can be simplified. Can be achieved. Further, since the discharge-side lid member also serves as the rectifying plate, the number of components can be reduced, so that the manufacturing cost of the structure of the light source device can be reduced.

In the light source device according to the present invention, the discharge opening has a size extending from the front surface to the rear surface of the reflector, and the discharge cover member is rotatably supported by the housing and is rotatable. It is preferable that, when detached from the optical apparatus, the discharge side opening is closed by being urged by an urging member.

[0013] With this configuration, since the discharge-side opening has a size extending from the front surface to the rear surface of the reflector, the cooling air discharged from the other opening of the reflector can be efficiently used by the lid member. Since the light can flow to the back surface of the reflector, the reflector and the light source lamp can be cooled more efficiently. In addition, the discharge side lid member,
By being rotatably supported by the housing and being urged by the urging member, the housing can be provided with the cooling channel opening / closing portion with a simple structure. Further, when the light source device is detached from the optical apparatus, the discharge side lid member can be sealed by closing the discharge side opening by being urged by the urging member so that the light source device can be ruptured. Shards
It is possible to reliably prevent the scattering into the optical device.

In the light source device according to the present invention, each opening is provided between an outer peripheral surface of the reflector in which the other opening is formed and an inner peripheral surface of the housing in which the discharge opening is formed. Preferably, an elastic member is interposed so as to surround the portion.

According to this structure, since the elastic member is interposed between the outer peripheral surface of the reflector and the inner peripheral surface of the housing so as to surround each opening, the supply from the opening of the housing is achieved. The generated air can be reliably guided to the opening of the reflector, and the air can be discharged from the opening of the reflector.

In the light source device according to the present invention, it is preferable that the housing is provided with a duct frame that covers the discharge side lid member. With this configuration, since the casing is provided with the duct frame, the duct frame covers the discharge-side lid member, so that debris does not scatter when the reflector and the light source lamp located inside the casing are damaged. Can be

In the light source device of the present invention, the duct frame includes a pair of concave portions formed on opposing side surfaces of the duct frame, and the handle is gripped by a finger when the housing is detached from the optical device. Preferably, a portion is formed.

According to this structure, since the handle portion is formed on the duct frame, the light source device can be attached to and detached from the optical device by using the handle portion. There is no need to provide In addition, since the grip portion is formed in a concave shape, the grip portion can be configured simply by deforming a part of the duct mold, thereby facilitating manufacture.

In the light source device according to the present invention, the supply-side lid member is slidably supported by the housing, and is urged by an urging member when detached from the optical device, so that the supply-side opening is opened. It is preferable to close the part.

According to this structure, the supply-side lid member is slidably supported by the housing and urged by the urging member, so that the cooling passage opening / closing portion is provided to the housing with a simple structure. Can be provided. When the light source device is detached from the optical device, the supply-side lid member is ruptured because the cooling passage of the light source device can be sealed by being urged by the urging member to close the supply-side opening. Debris such as a light source lamp can be reliably prevented from scattering into the optical device.

In the light source device according to the present invention, the housing is provided with a cover member for covering the supply-side lid member, and the cover member is formed with a rectifying plate for rectifying the supplied cooling air. Is preferred.

With this configuration, since the cover member is provided on the housing, the cover member can cover the supply-side lid member. It can be supplied to the cooling channel well. In addition, since the rectifying plate is formed on the cover member, the rectifying plate rectifies the supplied cooling air, so that the cooling air can be more efficiently supplied to the cooling channel.

The optical apparatus according to the present invention is characterized by including any one of the above-described light source devices. According to such an optical apparatus, the same operation and effect as described above can be enjoyed.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. [1. Main configuration of projector)
FIG. 1 is an overall perspective view of a projector 1 as an optical apparatus according to the present embodiment as viewed from above, and FIG.
3 to 5 are perspective views showing the inside of the projector 1. Specifically, FIG.
Is the upper case 2 of the projector 1 from the state of FIG.
1 and FIG. 4 shows the shield plate 8 from the state of FIG.
0, driver board 90, and upper light guide 47
FIG. 5 is a view in which the optical unit 4 is removed from the state of FIG.

In FIGS. 1 to 3, the projector 1
Has an outer case 2, a power supply unit 3 accommodated in the outer case 2, and a flat U-shaped optical unit 4 also arranged in the outer case 2, and has a substantially rectangular parallelepiped shape as a whole.

The outer case 2 includes an upper case 21, a front case 22, a lower case 23, and an interface cover 213 each made of resin. The upper case 21 and the front case 22 are formed integrally. Interface cover 21
Reference numeral 3 is arranged on the back side of the projector 1.

The upper case 21 includes an upper surface portion 211,
It is formed by a side surface portion 212 provided around the periphery. On the front side of the upper surface portion 211, a lamp cover 24 is fitted and detachably attached. In the upper surface 211, a cutout portion 211A is provided on the side of the lamp cover 24 where the upper surface of the projection lens 46 is exposed, so that the zoom operation and the focus operation of the projection lens 46 can be performed manually via a lever. It has become. An operation panel 25 is provided behind the notch 211A.

The front case 22 is provided with a round hole opening 212A which is continuous with the cutout portion 211A of the upper case 21, and the projection lens 46 is arranged corresponding to the round hole opening 212A. In the front case 22, an exhaust port 212B located in front of the internal power supply unit 3 is provided on a side opposite to the round hole opening 212A,
The exhaust port 212B exhausts the cooling air in a direction away from the image projection area, that is, to the left in FIG.
An exhaust louver 26 also serving as a light shield is provided.

The lower case 23 is formed of a bottom surface 231 and side surfaces 232 and a back surface 233 provided around the bottom surface 231. A first attitude adjustment mechanism 27 that adjusts the inclination of the projector 1 in the front-rear direction and aligns the projection image is provided on the front side of the bottom surface portion 231.
A second attitude adjusting mechanism 28 that adjusts the tilt of the projector 1 in the left-right direction substantially perpendicular to the front-rear direction is provided at one corner on the rear side of the bottom part 231, and the other corner has a position. Cannot be adjusted, but a rear foot 231A corresponding to the second posture adjustment mechanism 28 is provided. Further, the bottom surface 231 has a cooling air intake port 231.
B is provided. A mounting portion 2 for rotatably mounting the U-shaped handle 29 is provided on one side surface 232.
32A are provided.

On one side of the outer case 2, an upper case 21 and a lower case 23 are provided.
Each of the side portions 212 and 232 is provided with a side foot 2A (FIG. 2) serving as a foot when the projector 1 is set up with the handle 29 up. In addition, the outer case 2
Is provided with an interface portion 2B composed of a concave portion straddling the interface cover 213 and the rear portion 233 of the lower case 23. Inside the interface portion 2B, various connectors are mounted (not shown). An interface board is arranged. Also, on both left and right sides of the interface unit 2B,
Interface cover 213 and lower case 23
Hole 2C and intake port 2
D is provided. The intake port 2D is located behind the power supply unit 3 inside.

As shown in FIG. 4, the power supply unit 3 includes a power supply 31 and a lamp driving circuit (ballast) 32 arranged on the side of the power supply 31. The power supply 31 converts the power supplied through the power cable into the lamp driving circuit 3.
2 and a driver board 90 (FIG. 3) and the like, and has an inlet connector 33 (FIG. 2) into which the power cable is inserted. Lamp drive circuit 32
Supplies power to the light source lamp 411 of the optical unit 4.

As shown in FIGS. 4, 6, and 7, the optical unit 4 is a unit that optically processes a light beam emitted from the light source lamp 411 to form an optical image corresponding to image information. , An integrator illumination optical system 41, a color separation optical system 42, a relay optical system 43, an electro-optical device 44, a cross dichroic prism 45 as a color combining optical system
(FIG. 7), and a projection lens 46 as a projection optical system.

The power supply unit 3 and the optical unit 4 are covered with a surrounding aluminum shield plate 80 (FIGS. 3 and 5) including the upper and lower portions, so that electromagnetic noise from the power supply unit 3 and the like to the outside can be obtained. To prevent leaks.

[2. Detailed Configuration of Optical System] In FIGS. 4 and 7, the integrator illumination optical system 41 includes three liquid crystal panels 441 (liquid crystal panels 441R and 441G for each of red, green, and blue light components) constituting the electro-optical device 44. , 4
41B) is an optical system for substantially uniformly illuminating the image forming area of the light source device 413, a first lens array 418, a second lens array 414, a polarization conversion element 415, and a first condenser lens. 416, a reflection mirror 424, and a second condenser lens 419.

Of these, the light source device 413 is a light source lamp 411 as a radiation light source for emitting radial rays.
And a reflector 412 that reflects the radiated light emitted from the light source lamp 411. As the light source lamp 411, a halogen lamp, a metal halide lamp, or a high-pressure mercury lamp is often used. As the reflector 412, a parabolic mirror is used. In addition to a parabolic mirror, an elliptical mirror may be used together with a parallelizing lens (concave lens). This light source device 413 is an important part of the present invention, and will be described later in detail.

The first lens array 418 has a configuration in which small lenses having a substantially rectangular outline when viewed from the optical axis direction are arranged in a matrix. Each small lens divides a light beam emitted from the light source lamp 411 into a plurality of partial light beams. The outline shape of each small lens is
The shape is set to be substantially similar to the shape of one image forming area. For example, if the aspect ratio (the ratio between the horizontal and vertical dimensions) of the image forming area of the liquid crystal panel 441 is 4: 3, the aspect ratio of each small lens is also set to 4: 3.

The second lens array 414 has substantially the same configuration as the first lens array 418, and has a configuration in which small lenses are arranged in a matrix. The second lens array 414 has a function of forming an image of each small lens of the first lens array 418 on the liquid crystal panel 441 together with the first condenser lens 416 and the second condenser lens 419.

The polarization conversion element 415 is disposed between the second lens array 414 and the first condenser lens 416, and is unitized integrally with the second lens array 414. Such a polarization conversion element 415 includes a second
The light from the lens array 414 is converted into one type of polarized light, whereby the light use efficiency of the electro-optical device 44 is improved.

More specifically, the polarization conversion element 415
The respective partial lights converted into the polarized lights of the different types are finally converted by the first condenser lens 416 and the second condenser lens 419 into the liquid crystal panels 441R, 441R,
It is almost superimposed on 41G and 441B. In the projector 1 (electro-optical device 44) of the present embodiment using the liquid crystal panel 441 of the type that modulates polarized light, only one type of polarized light can be used. Almost half of the light is not used. Therefore, by using the polarization conversion element 415,
The light emitted from the light source lamp 411 is all converted to one type of polarized light, and the light use efficiency of the electro-optical device 44 is increased. Incidentally, such a polarization conversion element 415 is introduced in, for example, Japanese Patent Application Laid-Open No. 8-304739.

The color separation optical system 42 includes two dichroic mirrors 421 and 422 and a reflection mirror 423, and converts a plurality of partial light beams emitted from the integrator illumination optical system 41 by the dichroic mirrors 421 and 422 into red and green. , And blue light.

The relay optical system 43 includes an incident side lens 43.
1, relay lens 433, and reflection mirrors 432, 4
And a function of guiding the color light and blue light separated by the color separation optical system 42 to the liquid crystal panel 441B.

At this time, the dichroic mirror 421 of the color separation optical system 42 transmits the blue light component and the green light component of the light beam emitted from the integrator illumination optical system 41 and reflects the red light component. The red light reflected by the dichroic mirror 421 is
The light is reflected by 3 and reaches the liquid crystal panel 441R for red through the field lens 417. This field lens 4
17 converts each partial light beam emitted from the second lens array 414 into a light beam parallel to its central axis (principal ray). The same applies to the field lens 417 provided on the light incident side of the other liquid crystal panels 441G and 441B.

Of the blue light and the green light transmitted through the dichroic mirror 421, the green light is reflected by the dichroic mirror 422 and passes through the field lens 417 to reach the liquid crystal panel 441G for green. On the other hand, the blue light passes through the dichroic mirror 422, passes through the relay optical system 43, and further passes through the field lens 417 to reach the liquid crystal panel 441B for blue light. The reason why the relay optical system 43 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, thereby preventing a reduction in light use efficiency due to light diffusion or the like. That's why. That is, this is for transmitting the partial light beam incident on the incident side lens 431 to the field lens 417 as it is.

The electro-optical device 44 includes liquid crystal panels 441R, 441G, and 441B serving as three light modulating devices.
These use, for example, a polysilicon TFT as a switching element, and each color light separated by the color separation optical system 42 is supplied to these three liquid crystal panels 441R,
The optical image is modulated by 41G and 441B in accordance with image information.

The cross dichroic prism 45 has three
A color image is formed by combining images modulated for each color light emitted from the liquid crystal panels 441R, 441G, and 441B. In the cross dichroic prism 45, a dielectric multilayer film that reflects red light and a dielectric multilayer film that reflects blue light are formed in a substantially X shape along the interface of the four right-angle prisms. The three colored lights are combined by the dielectric multilayer film. Then, the color image synthesized by the prism 45 is emitted from the projection lens 46 and is enlarged and projected on the screen.

The optical systems 41 to 45 described above are housed in a light guide 47 as a housing for optical parts made of synthetic resin, as shown in FIGS. The light guide 47 includes the optical components 414 to 419, 4
Lower light guide 47 provided with grooves for slidingly fitting 21 to 423 and 431 to 434 from above.
1 and a lid-like upper light guide 472 that closes the upper opening side of the lower light guide 471. A head section 49 is formed on the light exit side of the light guide 47. A projection lens 46 is provided in front of the head 49.
Are fixed, and the liquid crystal panels 441R, 441G,
The prism 45 to which 441B is attached is fixed.

[3. Cooling Structure] In the projector 1 of the present embodiment, a panel cooling system A for mainly cooling the liquid crystal panels 441R, 441G and 441B, a lamp cooling system B for mainly cooling the light source lamp 411, and a power supply 31 for mainly cooling. And a power supply cooling system C.

2, 4 and 5, in the panel cooling system A, a pair of sirocco fans 51 and 52 arranged on both sides of the projection lens 46 are used. The cooling air sucked from the intake port 231B on the lower surface by the sirocco fans 51, 52 is supplied to the liquid crystal panels 441R, 441G, 44.
After cooling the lower side of the driver board 90 (FIG. 3), the lower side of the driver board 90 (FIG. 3) is moved toward the axial exhaust fan 53 at the front corner, and the front side exhaust port 212B is cooled.
It is exhausted from.

4 to 6, the lamp cooling system B
Uses a sirocco fan 54 provided on the lower surface of the optical unit 4. The cooling air in the projector 1 drawn by the sirocco fan 54 enters the light guide 47 from an opening (not shown) provided in the upper light guide 472, and enters between the unitized second lens array 414 and the polarization conversion element 415. After cooling these through, the sirocco fan 54 exits through the exhaust side opening 471A of the lower light guide 471 and is discharged. The discharged cooling air passes through the light guide 47 again from the intake side opening 471B of the lower light guide 471.
Into the light source device 413 and the light source lamp 4
After cooling, the air exits from the light guide 47 and is exhausted from the exhaust port 212B by the axial exhaust fan 53. The cooling structure of the light source device 413 will be described later.

In FIG. 4, in the power supply cooling system C, the power supply 3
An axial-flow intake fan 55 provided behind 1 is used. The cooling air sucked from the rear-side intake port 2D by the axial-flow intake fan 55 cools the power supply 31 and the lamp drive circuit 32, and is then exhausted by the axial-flow exhaust fan 53, similarly to the other cooling systems A and B. Air is exhausted from the port 212B.

[4. Structure of Light Source Device] Light source device 4 described above
Reference numeral 13 denotes a lamp body 410 and a housing 500 for accommodating the lamp body 410, as shown in FIGS.
And the light guides 471 and 47 of the projector 1
2 is configured to be detachable.

The lamp body 410 is, as shown in FIG.
A light source lamp 411 and a reflector 412 for aligning and emitting light rays emitted from the light source lamp 411 are provided. The light emitting surface of the reflector 412 is covered with a transparent plate 501 such as a glass plate, and the contact surface of the transparent plate 501 and the reflector 412 is
Exhaust-side openings 5 symmetrically arranged with respect to 12 optical axes
07 and an intake side opening 508 are formed. The exhaust-side opening 507 and the intake-side opening 508 are formed by cutting the distal end portion of the reflector 412 into a concave shape.
01, and each opening 507, 50
Each of the filters 8 is provided with a dustproof filter (not shown). Accordingly, a path through which air passes from the intake side opening 508 to the exhaust side opening 507 is formed in the lamp body 410, and this becomes a part of the cooling channel D, so that the light source lamp 411 can be cooled.

The housing 500 holds the light source lamp 41 in the direction of the optical axis of the emitted light beam and in the direction orthogonal to the optical axis.
1 and a reflector 412 for positioning the housing body 510 and the discharge side lid member 5.
20, a duct frame 530, and a supply-side lid member 550
And is provided.

The housing main body 510 includes three side portions 512 arranged so as to surround three sides of the lamp main body 410,
Front part 513 arranged on the light emission side of lamp body 410
And is formed in a box shape having: Front part 513
The opening 514 where the above-mentioned transparent plate 501 is exposed is partially provided.
Are formed. Further, a support portion 515 for attaching a support shaft 523 of a discharge side lid member 520 described later is formed on the upper surface side of the housing body 510. Further, screw holes 516 are provided on the upper left side and lower right side in FIG.

When the lamp body 410 is stored in the housing body 510, the peripheral edge of the reflector 412 is brought into contact with the front portion 513 having the opening 514, and the lamp body 410 is fixed to the housing body 510. A discharge side opening 503 is formed on the upper surface of the housing body 510. The discharge-side opening 503 is located at the front end of the light-emitting side, and
0, and the base end extends to the back side of the reflector 412. In addition, a partition plate (not shown in FIG. 8) is provided in the discharge-side opening 503 in a direction along the front portion 513. The inner surface of the distal end portion of the opening 503 partitioned by this partition plate and the opening 5
An elastic member is interposed between the outer surface of the opening 07 and the outer surface of the opening 07. Here, the elastic member is rubber or the like.
Any member can be adopted.

The discharge-side lid member 520 constituting the discharge-side cooling channel opening / closing section 505 directly closes the discharge-side opening 503 formed on the upper surface of the housing body 510. It is formed in a flat plate shape that closes the discharge side opening 503, and is attached to the housing body 510 by the support shaft 523. Further, bar-shaped portions 522 extend from both side ends of the lid body 521. When the light source device 413 is mounted, the rod portion 522 comes into contact with a projection formed on the lower light guide 471 (see FIG. 6), and the discharge side lid member 520 is lifted. As a result, the discharge-side cooling channel opening / closing section 5
05 opens, and the cooling flow path D is opened. When the housing 500 is detached from the projector 1, the discharge-side lid member 520 is closed to close the discharge-side cooling channel opening / closing section 50.
5 closes and closes the cooling channel D.

The duct frame 530 is connected to the discharge side lid member 5.
20 is a member having a substantially U-shaped cross section that covers the lid main body 521 of the discharge side lid member 520. The duct frame 530 has a mounting recess 532 on the side wall surface.
Further, a handle portion 533 is formed on the back side. Further, screw holes 536 are provided on the upper left and lower right sides of the duct frame 530 in FIG. The duct frame 530 has a hollow inside, and forms a space in which the discharge-side lid member 520 is rotatable. Although not shown in FIG. 8, a coil spring serving as a biasing member for the discharge side lid member 520 is housed in this space, and biases the discharge side lid member 520 toward the housing body 510.

The mounting recess 532 is provided in the discharge side lid member 52.
Zero rod portions 522 are formed at corresponding positions and have a shape that can be fitted. The size of the mounting concave portion 532 is large enough to allow the rod-shaped portion 522 to move because the discharge-side lid member 520 is rotatable. The handle portion 533 is formed of a pair of concave portions in which a part of a pair of side walls of the duct frame 530 having a U-shaped cross section is curved inward, so that the light source device 413 can be easily held by a finger when the light source device 413 is attached to or detached from the projector 1. Has become. The screw holes 536 correspond to the positions of the screw holes 516 on the upper surface of the housing body 510, and the screws 517 are inserted and the ends of the screws 517 reach the screw holes 516, so that the duct frame 530 and the housing body 510 is fixed.

A cover member 551 is provided below the housing body 510, and the cover member 551 includes
A supply-side opening 504 is formed. Further, as shown in FIG. 8, the supply-side cooling channel opening / closing section includes a supply-side lid member 55.
0. The supply-side lid member 550 is slidably supported by the housing body 510.
Coil spring 55 which is an urging member for urging 0 in the sliding direction
6 is provided. One end of the coil spring 556 is attached to the supply-side lid member 550, and the other end is inserted and fixed in a concave portion formed in the bottom surface portion 511 of the housing body 510. The cover member 551 is, as shown in FIGS.
A plate-shaped member that comes into contact with the lamp body 410, and an air intake portion 553 in which the center of the front end of the plate-shaped member is bulged in an out-of-plane direction, the front end portion of the air intake portion 553 is connected to the supply opening 5
04. Further, a rectifying plate 554 that partitions the air into two spaces is provided at the center of the air intake unit 553. The rectifying plate 554 is a plate-shaped member and rectifies the cooling air supplied from outside the housing 500.

The light source device 413 forms a part of the optical unit 4 as shown in FIG. Further, as shown in FIG. 11, which is a cross-sectional view taken along the line AA of FIG. 10, the light source device 413 includes optical components 414, 415, 416, 41
As shown by arrows, cooling air is supplied from the portion provided with 8 by the sirocco fan 54, and flows through the cooling channel D of the housing 500 to the rear surface of the reflector 412. Specifically, the cooling passage D includes a supply-side cooling passage opening / closing unit, a supply-side opening 504, an intake-side opening 508, a space in front of the lamp body 410, and an exhaust-side opening 507. , And a space passing through the discharge side opening 503 and the discharge side cooling channel opening / closing part 505. And
The cooling air that has passed through the cooling flow path D is
0 and a discharge-side lid member 52 that functions as a current plate.
By being blocked by 0, the light is guided to the rear side of the reflector 412.

According to the above-described embodiment, the following effects can be obtained. Cooling air is supplied to the reflector 41 through the supply opening 504 and the discharge opening 503 through the housing 500.
Since the cooling channel D is provided to the rear side of the light source 2, the reflector 412 and the light source lamp 411 can be efficiently cooled, and the life of the light source lamp 411 can be extended. In addition, the electrode of the light source lamp 411 is usually located on the back side of the reflector 412, and the electrode easily generates heat. Therefore, the cooling air flows through this portion to efficiently cool the electrode. Thus, the life of the light source lamp 411 can be extended. Further, since the discharge-side cooling channel opening / closing portion 505 and the supply-side cooling channel opening / closing portion which close the cooling channel D when the projector 1 is detached are provided, the luminous tube of the light source lamp 411 is used while the projector 1 is in use. Even when the projector 1 is ruptured, the arc tube fragments do not scatter outside when the projector 1 is replaced. When the projector 1 is mounted on the projector 1, the discharge-side cooling channel opening / closing portion 505 and the supply-side cooling channel opening / closing portion provide the cooling flow. Since the configuration is such that the path D is opened, the cooling efficiency of the light source lamp 411 is not impaired.

The housing 500 has a supply-side opening 504 and a discharge-side opening 503 so that the supply-side opening 5
04 supplies cooling air from the outside of the housing 500, and the discharge side opening 503 discharges cooling air to the outside of the housing 500. Therefore, the light source lamp 411 is efficiently used by using air outside the projector 1. Can be cooled. The discharge-side cooling channel opening / closing unit 505 and the supply-side cooling channel opening / closing unit are respectively provided with a discharge-side lid member 520 and a supply-side lid member 550.
With this configuration, the discharge-side cooling channel opening / closing portion 505 and the supply-side cooling channel opening / closing portion can be configured with a simple structure of a lid member, so that the structure of the projector 1 having the explosion-proof structure can be simplified. it can. Further, since the discharge side lid member 520 also functions as a rectifying plate, the number of components can be reduced, so that the cost of manufacturing the structure of the projector 1 can be reduced.

The discharge opening 503 is connected to the reflector 412.
Since the cooling air discharged from the discharge-side opening 503 of the reflector 412 can efficiently flow to the back of the reflector 412 by the discharge-side lid member 520, The cooling of the reflector 412 and the light source lamp 411 can be performed more efficiently. Also, the discharge side lid member 520 is
By being rotatably supported by the shaft 00, the discharge-side cooling channel opening / closing portion 505 can be provided in the housing 500 with a simple structure.

Since the casing 500 is provided with the duct frame 530, the duct frame 530 covers the discharge-side lid member 520, so that when the reflector 412 and the light source lamp 411 located inside the casing 500 are broken, Can be prevented from scattering. Since the handle portion 533 is formed in the duct frame 530, the light source device 413 can be attached to and detached from the projector 1 by using the handle portion 533. Absent. Further, since the handle portion 533 is formed in a concave shape, the handle portion 533 can be configured only by deforming a part of the duct forming die, and therefore, the manufacturing is easy.

The supply-side lid member 550 is slidably supported by the housing 500 and is urged by the coil spring 556 to provide a supply-side cooling channel opening / closing portion in the housing 500 with a simple structure. be able to. Also, the supply-side lid member 55
When the light source device 413 is detached from the projector 1, the light source device 413 can be hermetically closed by being urged by the urging member and closing the supply-side opening 504. However, scattering in the projector 1 can be further prevented.

Since the housing 500 is provided with the cover member 551, the cover member 551 can cover the supply-side lid member 550, so that there is no leakage of cooling air from the cooling channel D. The cooling air can be efficiently supplied to the cooling passage D. Also, the cover member 55
Since the current plate 1 has the current plate 554, the current plate 554 rectifies the supplied cooling air, so that the cooling air can be more efficiently supplied to the cooling channel D.

It should be noted that the present invention is not limited to the above embodiment, and modifications and improvements as long as the object of the present invention can be achieved are included in the present invention. For example,
The urging means is not limited to the coil spring 556, and various urging means such as a compression spring, a leaf spring, and an elastic rubber body may be employed.

The projector is not limited to a projector using three light modulators, but a projector using only one light modulator, a projector using two light modulators, or a projector using four or more light modulators. The present invention can also be applied to a projector using. In the above-described embodiment, a liquid crystal panel is used as the light modulation device. However, a light modulation device other than liquid crystal, such as a device using a micromirror, may be used. Further, in the above-described embodiment, the transmission type light modulation device in which the light incident surface and the light emission surface are different is used,
A reflection type light modulator in which the light incident surface and the light exit surface are the same may be used. Furthermore, in the above-described embodiment, only the example of the front type projector that performs projection from the direction of observing the screen has been described. However, the present invention provides a rear type projector that performs projection from the side opposite to the direction of observing the screen. Is also applicable.

[0069]

According to the present invention, even if the light source lamp ruptures, the fragments are not scattered to the outside and can be efficiently cooled to extend the life of the light source lamp. There is.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a projector according to an embodiment of the present invention as viewed from above.

FIG. 2 is an overall perspective view of the projector according to the embodiment as viewed from below.

FIG. 3 is a perspective view showing a state where an upper case is removed from the state shown in FIG. 1;

FIG. 4 is a perspective view of the shield plate, the driver board, and the upper light guide removed from the state of FIG. 3 and viewed from the rear side.

FIG. 5 is a perspective view showing a state where an optical unit is removed from the state of FIG. 4;

FIG. 6 is a perspective view of the optical unit in the embodiment as viewed from below.

FIG. 7 is a plan view schematically showing the optical unit in the embodiment.

FIG. 8 is an exploded perspective view of the light source device in the embodiment.

FIG. 9 is an exploded perspective view of the light source device in the embodiment.

FIG. 10 is a plan view of the optical unit in the embodiment as viewed from above.

FIG. 11 is a cross-sectional view of the optical unit taken along line AA of FIG. 10 in the embodiment.

[Explanation of symbols]

 Reference Signs List 1 projector 410 lamp body 411 light source lamp 412 reflector 413 light source device 500 housing 503 discharge side opening 504 supply side opening 505 discharge side cooling channel opening / closing part 507 exhaust side opening 508 intake side opening 520 discharge side lid member 530 Duct frame 550 Supply side lid member 551 Cover member 554 Rectifier plate 556 Coil spring D Cooling channel

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G03B 21/16 F21M 1/00 A // F21Y 101: 00 7/00 L

Claims (10)

[Claims] 1. A light source device comprising a light source lamp, a reflector for aligning and emitting light rays emitted from the light source lamp, and a housing for accommodating the light source lamp and the reflector, and used as a light source of an optical apparatus. Wherein the light exit surface of the reflector is covered with a transparent plate, and a pair of openings symmetrically arranged about the optical axis of the reflector are formed on the transparent plate and the contact surface of the reflector, A cooling channel that supplies cooling air to one of the pair of openings and guides the cooling air discharged from the other opening to the back side of the reflector; A light source device, comprising: a cooling channel opening / closing unit that opens the cooling channel when mounted on the optical device and closes the cooling channel when detached from the optical device. 2. The light source device according to claim 1, wherein the cooling flow path is provided with a rectifying plate for flowing cooling air discharged from the other opening to the rear side of the reflector. Characteristic light source device. 3. The light source device according to claim 2, wherein the housing has a supply-side opening for supplying cooling air to the one opening, and cooling air discharged from the other opening. And a discharge-side opening for opening and closing the supply-side opening, and a discharge-side lid for opening and closing the discharge-side opening. A light source device, comprising: a discharge member; and the discharge-side lid member also serves as the current plate. 4. The light source device according to claim 3, wherein the discharge-side opening has a size extending from a front surface to a rear surface of the reflector, and the discharge-side lid member is rotatable with respect to the housing. A light source device that is supported by a shaft and is urged by an urging member to close the discharge-side opening when detached from the optical device. 5. The light source device according to claim 4, wherein an outer peripheral surface of the reflector in which the other opening is formed and an inner peripheral surface of the housing in which the discharge opening is formed. , An elastic member is interposed so as to surround each opening. 6. The light source device according to claim 3, wherein the casing is provided with a duct frame that covers the discharge side lid member. 7. The light source device according to claim 6, wherein the duct frame comprises a pair of concave portions formed on opposing side surfaces of the duct frame, and when the housing is detached from an optical device. A light source device, wherein a handle portion gripped by a finger is formed. 8. The light source device according to claim 3, wherein the supply-side lid member is slidably supported by the housing, and a biasing member when detached from the optical device. A light source device which is urged by the liquid crystal to close the supply-side opening. 9. The light source device according to claim 8, wherein the housing is provided with a cover member that covers the supply-side lid member, and the cover member has a rectifying plate that rectifies the supplied cooling air. A light source device, characterized in that a light source device is formed. 10. An optical apparatus comprising the light source device according to claim 1.