JPH11109514A - Projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a projector possible to realize miniaturization and power saving by making a motive power for switching a color filter which adds color information to a light beam and a motive power for cooling a light source common of usable. SOLUTION: The light beam 10a is emitted from the light source 1 and made incident on the color filter 3. The color filter 3 adds an aimed color and the color information to the light beam 10a by rotating a filter consisting of three colors, red, blue and green by a motor 2 ordinarily in order to add the color information synchronizing with a reflected video to the light beam 10a. The motive power of a fan 5 for cooling the light source 1 is made common to the motive power of the motor 2 for rotating the color filter 3, and rotational energy generated by the motor 2 is also transmitted to the fan 5. The current of air generated by the fan 5 is sucked from a duct suction part 8a and throttled at the mouth part 8b of a duct for the purpose of efficiently cooling the light source 1, thereby, the air speed at the mouth part is made higher than that at the suction part 8a. The light source 1 is efficiently cooled by the current of air.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for projecting data such as data created by a personal computer or an image such as a video.

[0002]

2. Description of the Related Art In a conventional projection apparatus, light emitted from a light source is split into three light beams, each of which is incident on a liquid crystal panel having red, green, and blue information, and is reflected or transmitted, whereby color information is transmitted. The image light has a color, and the light is combined to form an image as a color image, which is projected on a screen of a presentation room and used.

[0003]

However, these days, the performance of notebook personal computers has been improved, the application software has been enhanced, the environment in which presentation using portable video can be easily performed, and the light source has been dispersed by the development of a spatial modulator. Since color information can be added to an image by switching color filters without any problem, the size of the projection device has been reduced and it has become possible to carry it frequently. Although further downsizing was required, the light source generated intense heat and forced cooling was indispensable, and a dedicated cooling device was required, which impaired downsizing and power saving.

[0004] Therefore, it is an object of claims 1 to 3 and 7 to provide a projection apparatus that can be reduced in size or power consumption.

It is another object of the present invention to provide a projection device capable of further reducing the size and power consumption.

[0006]

In each of the first to third aspects of the present invention, the power of a means for switching a color filter for adding color information to a light beam and the power of a means for cooling a light source are shared. And means for performing the above operations. The means to switch color filters is
A method in which a plurality of color filters are prepared and changed using a cam or the like in a shutter type, a method in which a color filter of a plurality of colors is connected in a belt shape is moved, or a method in which a plurality of color filters are provided in a disk shape Can be considered. In addition, the means for cooling the light source is to enclose a fluid in a tube, circulate the same with a pump, and dispose the tube around the light source, so that the heat generated by the light source,
A method in which the fluid in the tube exchanges heat to lower the temperature around the light source, or a method in which the light source is cooled by blowing air to the light source with a fan can be considered.

Here, the power for switching the color filter for adding color information to the light beam and the means for sharing the power for cooling the light source include the power for switching the color filter and the means for cooling the light source. Or, conversely, the power for cooling the light source to the means for switching the color filters.

The projection apparatus according to the present invention comprises a light source, a color filter, a means for switching between color filters, a spatial modulator, and a means for cooling the light source. Then, the light is incident on a color filter for adding color information to the image, the color information is added to the light beam by the color filter, and the light is incident on a spatial modulator for modulating the image. A plurality of micromachines are incorporated in the spatial modulator in a plane, and the micromachine is turned on and off based on a video signal, so that light incident on the spatial modulator is modulated by the operation of the micromachine, It is reflected as an image in the projected direction.

On the other hand, a high-luminance light source such as a halogen lamp or a xeron lamp is used to generate high heat. In order to cool the light source, it is necessary to perform cooling by a cooling unit. Further, the color filter is composed of a plurality of color filters. By switching the color filters for the light rays, it is possible to add color information of a plurality of colors to the light rays. Here, by making the power of the means for switching the color filters and the power of the cooling means for cooling the light source common, the miniaturization or power saving of the projection device can be achieved.

According to the second aspect of the present invention, the power of the motor, which is a means for switching the color filters, is transmitted to a pump for forcibly circulating a liquid sealed in a tube for cooling the light source. The power for switching the color filters can be shared with the power for cooling the light source, and downsizing or power saving can be achieved.

The power of the motor, which is means for switching the color filters, is transmitted to a fan for cooling the light source, so that the power for switching the color filters is cooled. Power for power saving can be shared, and downsizing or power saving can be achieved.

In order to efficiently cool the light source according to the fourth aspect of the present invention, a guide plate is provided for controlling the direction of the wind generated by the fan, and the wind generated by the fan is directed to the guide plate. , The wind can be guided to the light source, and the cooling can be performed efficiently, so that downsizing or power saving can be achieved. In addition, the direction of the wind can further improve the cooling effect by generating the wind upward from below in consideration of thermal convection. Further, by providing a plurality of guide plates, more effective control of the wind direction becomes possible, and further power saving becomes possible.

According to the fifth aspect of the present invention, in order to efficiently cool the light source, a duct for controlling the direction of the wind generated by the fan is provided, and the wind generated by the fan is used by the duct. Thus, the wind direction can be controlled, the wind can be guided to the light source, and the cooling can be performed efficiently, and miniaturization or power saving can be achieved.

According to a sixth aspect of the present invention, in order to efficiently cool the light source according to the fifth aspect of the present invention, a duct is provided for controlling the direction of the wind generated by the fan, and the wind generated by the fan is provided. In the case of controlling the wind direction by using a duct and guiding the wind to the light source for efficient cooling, the area of the inlet of the duct is made larger than the area of the opening of the part that cools the light source. The wind speed for cooling the light source can be increased, the light source can be cooled more efficiently, and further downsizing or power saving can be achieved.

According to a seventh aspect of the present invention, in addition to the common power of the third aspect of the present invention, the power of the means for cooling the color filters is further shared.

In the color filter, light rays and heat emitted from the light source are applied to a color filter for adding color information to the light rays, so that heat is stored. Therefore, it is necessary to cool the color filter, but the power of the fan, which is a means for cooling the color filter,
By sharing the power of the means for switching the color filters and the power of the fan, which is the means for cooling the light source, it is possible to reduce the size and power consumption of the projection device.

According to an eighth aspect of the present invention, in the projection device of the first aspect, in order to more efficiently cool the light source, the wind generated by the fan, which is a means for cooling the light source, flows through the tube. By passing around the cooled tube, it is possible to blow a still cooler air to the light source, and more efficient cooling is possible. Here, the power of the means for switching the color filter, the power of moving the pump for forcibly circulating the liquid in the tube through which the liquid for cooling the light source flows, and the power of the fan which is the means for cooling the light source. By sharing the same, more effective cooling becomes possible, and miniaturization and power saving become possible.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION

[Embodiment 1] An example of this embodiment will be described below with reference to the drawings.

FIG. 1 is a block diagram of a projection device for explaining the first and second aspects of the present invention.

Next, the configuration of the projection device will be described with reference to the drawings. 1 is a ray 10 for projecting an image
a light source for emitting light a, 2 a motor for rotating a color filter 3 for adding color information to the light beam 10a, 3 a color filter for adding color information to the light beam 10a, and 10b a color filter for color light 3 A light beam 4 to which information has been added, 4 is a spatial modulator for adding video information to the light beam 10b, 10c is a light beam obtained by adding video information to the light beam 10b having color information by the spatial modulator 4, and 100 is a light source 1. A pump for forcibly circulating the liquid 102 sealed in the tube 101 for cooling, and 101 is a tube in which the liquid 102 for cooling the light source 1 is sealed. Reference numeral 102 denotes a liquid sealed in the tube 101 for cooling the light source 1.

Next, the operation will be described. The light source 10 emits a light ray 10 a and enters the color filter 3. In order to add color information synchronized with an image to be projected to the light beam 10a, a color filter is usually rotated by a motor 2 with a filter composed of three colors, such as red, blue, and green, to add a desired color to the light beam 10a. Add color information. In order to make the light beam 10b having the color information incident on the spatial light modulator 4 and produce an image synchronized with the light beam 10b, the micromachine element in the spatial light modulator is turned on and off in synchronization with the color information and the image is projected. Ray 1 necessary for
0c is reflected to the projection optical path side. On the other hand, the tube 101
A liquid for cooling the light source 1 is enclosed therein.
The inside of the tube 101 is forcibly circulated by the pump 100. The temperature of the liquid 102 rises near the light source 1 due to heat exchange with the heat generated by the light source 1. However, since the liquid 100 is forcibly circulated in the tube 101 by the pump 100, at a point far from the light source 1, the liquid 102 undergoes heat exchange with room temperature, and the temperature decreases. Cold liquid 102 is pump 10
0 circulates through the tube 101 to cool the light source 1.

Here, by connecting the shaft of the motor 2 for rotating the color filter 3 and the shaft of the pump 100, it is possible to share the power, and the power of the motor 2 allows the pump 100 and the color filter 3 to be shared. It can be driven, and downsizing or power saving can be achieved.

[Embodiment 2] An example of this embodiment will be described below with reference to the drawings.

FIG. 2 is a block diagram of the projection device for explaining the first and third aspects of the present invention.

Hereinafter, the configuration of the projection apparatus will be described with reference to FIG. 2. The light source 1, the light beam 10a, the motor 2, the color filter 3, the light beam 10b, the spatial modulator 4, and the light beam 10c are the same as those in the first embodiment. The description is omitted because it is the same. Reference numeral 5 denotes a fan for generating a wind for cooling the light source 1.

Next, the operation will be described. Since the operation up to the point where the light beam 10c required for projecting an image is reflected on the side of the projection optical path is the same as that of the first embodiment, the explanation is omitted. The power of the fan 5 for cooling the light source 1 is shared with the axis of the motor 2 for rotating the color filter 3, and the rotational energy generated by the motor 2 is also transmitted to the fan 5. Accordingly, the fan 5 is also rotated by the rotation of the motor 2, and the light source 1 is cooled by generating the wind and blowing the wind to the light source 1.

Therefore, the motor 2 can be used as a common motive power for simultaneously rotating the color filter 3 and the fan 5, and the size and power consumption can be reduced.

[Embodiment 3] An example of this embodiment will be described below with reference to the drawings.

FIG. 3 is a block diagram of the projection apparatus for explaining the first and fourth aspects of the present invention.

Hereinafter, the configuration of the projection apparatus will be described with reference to FIG. 3. The light source 1, light beam 10a, motor 2, color filter 3, light beam 10b, spatial modulator 4, and light beam 10c are the same as those in the first embodiment. The description is omitted because it is the same. Reference numeral 5 denotes a fan for generating wind for cooling the light source 1, reference numeral 6 denotes a guide plate for efficiently guiding the wind generated by the fan 5 to the light source 1, and reference numeral 7 denotes a housing of the projection device.

Next, the operation will be described. The operation up to the point where the light beam 10c necessary for projecting an image is reflected on the side of the projection optical path is the same as that of the first embodiment, and the description is omitted. The operation for cooling the light source 1 by using the fan 5 is the same as that in the second embodiment, and the description is omitted. The wind generated by the fan 5 is guided in the direction of the light source 1 by the guide plate 6 and is applied to the light source 1 to be efficiently cooled, so that the light source 1 can be cooled efficiently and the projection device can be reduced in size. Energy saving can be realized.

[Embodiment 4] An example of this embodiment will be described below with reference to the drawings.

FIG. 4 is a block diagram of a projection device for explaining the first, fifth and sixth aspects of the present invention.

Hereinafter, the configuration of the projection apparatus will be described with reference to FIG. 4. The light source 1, light beam 10a, motor 2, color filter 3, light beam 10b, spatial modulator 4, and light beam 10c are the same as those in the first embodiment. The description is omitted because it is the same. 5 is a fan for generating wind for cooling the light source 1, 8 is a duct for efficiently guiding the wind generated by the fan 5 to the light source 1, and 8 a is a duct 8 for guiding the wind generated by the fan 5.
A suction port 8b for receiving the air inside is a port narrowed to cool the light source 1 by passing the air generated by the fan 5 through the duct 8 via the suction port 8a. Here, the area of the suction port 8a of the duct 8 is larger than the area 8b of the port for cooling the light source 1.

Next, the operation will be described. The operation up to the point where the light beam 10c required for projecting an image is reflected on the side of the projection optical path is the same as that of the first embodiment, so that the description is omitted. The operation for cooling the light source 1 by using the fan 5 is the same as that in the second embodiment, and the description is omitted. The wind generated by the fan 5 is sucked from the suction part 8a of the duct, and is throttled at the mouth part 8b of the duct for the purpose of efficiently cooling the light source 1, and becomes faster than the wind speed of the suction part 8a. I have. The wind cools the light source 1 efficiently.

In this embodiment, since the heat convection is positively used for cooling the light source 1, the hot air warmed by the light source 1 escapes upward.

As described above, by further efficiently cooling the light source 1 by the wind generated by the fan 5, further downsizing and power saving can be achieved.

[Fifth Embodiment] An example of this embodiment will be described below with reference to the drawings.

FIG. 5 is a block diagram of a projection device for explaining the first and seventh aspects of the present invention.

The configuration of the projection device will be described below with reference to FIGS. First, the configuration will be described with reference to FIG. 5, but the light source 1, the light beam 10a, the motor 2, the light beam 10a, the light beam 10b, the spatial modulator 4, and the light beam 10c are the same as those in the first embodiment, and thus the description is omitted. . Reference numeral 30 denotes a color filter which includes a fan for cooling the color filter and adds color information to the light beam 10a.
Is a shaft for transmitting the rotational power of the motor 2 to the belt,
11 is a belt for transmitting the power of the shaft 20 to the fan 5, and 12 is a guide for changing the transmission direction of the belt 11.

Next, the structure of the color filter 30 will be described with reference to FIG. FIG. 6 is a side view of the color filter 30. The color filter 30 includes a color filter 30a and a fan 30b arranged on the outer peripheral side. 30
a is a color filter through which the light ray 10a enters and passes;
b is a fan for cooling the color filter 30a.

Next, the operation will be described with reference to FIG. 5. Since the operation is the same as that of the first embodiment up to the point where the light ray 10c necessary for projecting an image is reflected on the side of the projection optical path, the explanation will be made. Omitted. The rotation of the motor 2 causes the color filter 30 fixed to the shaft 20 and the belt 1 to rotate.
1 rotates. The direction of the rotation of the belt 11 is changed by 90 degrees by the guide 12 and transmitted to the fan 5. Fan 5
Is rotated by the rotational power of the belt 11, sucks wind from below, and blows the wind toward the light source 1. The light source 1 is cooled by the wind of the fan 5.

On the other hand, the rotation of the motor 2 is transmitted to the color filter 30 via the shaft 20, and the color filter 30 rotates. The light beam 10a is incident on the color filter 30, and is heated by the heat radiation of the light source 1 and the light beam 10a. Next, cooling of the color filter 30 will be described with reference to FIG. When the color filter 30 rotates, the fan 30b attached to the outer circumference also rotates, and the fan 30b generates wind from the inside to the outside, so that the color filter 30a is cooled.

As described above, the color filter 30 is rotated by only the power of the motor 2 shown in FIG. 5, and the color filter 30 is cooled, and the light source 1 can be further cooled. And power saving can be realized.

Embodiment 6 An example of this embodiment will be described below with reference to the drawings.

FIG. 7 is a block diagram of a projection device for explaining the first and seventh aspects of the present invention.

Hereinafter, the configuration of the projection apparatus will be described with reference to FIG. 7, but the light source 1, light beam 10a, motor 2, color filter 3, light beam 10b, spatial modulator 4, light beam 10c
Is the same as in the first embodiment, and a description thereof will be omitted. Reference numeral 20 denotes a shaft for transmitting the rotational power of the motor 2 to the belt 11, the belt 14, and the color filter 3.
Are belts for transmitting the power of the shaft 20 to the fan 5,
Is a fan for cooling the light source, 13 is a belt for transmitting the power of the belt 14 to the fan 9, and 9 is a fan for cooling the color filter 3.

Next, the operation will be described with reference to FIG. 7. Since the operation up to the point where the light beam 10c necessary for projecting an image is reflected on the side of the projection optical path is the same as that of the first embodiment, the operation is described. Omitted. When the motor 2 rotates, the shaft 20 rotates and the color filter 30 and the belt 11 are rotated.
And the belt 13 rotates. The rotation of the belt 11 is transmitted to the fan 5. The fan 5 is rotated by the rotational power of the belt 11, sucks the wind from the left direction, and blows the wind toward the light source 1. The light source 1 is cooled by the wind of the fan 5.

On the other hand, the rotation of the motor 2 is transmitted from the shaft 20 to the belt 14 and further transmitted to the fan 9 via the shaft 13. The rotation of the fan 9 inhales air from the left direction and blows the air to the color filters 3 to cool the color filters 3.

In the above-described manner, the power of the motor 2 can be shared as the power of the color filter 3 and the power of the fans 5 and 9.
The color filter 3 can be cooled, and the size and power consumption of the projection device can be reduced.

Embodiment 7 An example of this embodiment will be described below with reference to the drawings.

FIG. 8 is a block diagram of a projection device for explaining the first and seventh aspects of the present invention.

Hereinafter, the configuration of the projection apparatus will be described with reference to FIG. 8, but the light source 1, the light beam 10a, the motor 2, the color filter 3, the light beam 10b, the spatial modulator 4, and the light beam 10c are the same as those in the first embodiment. The description is omitted because it is the same. Reference numeral 20 denotes a shaft for transmitting the rotational power of the motor 2 to the gears 24, 26 and the fan 5, reference numeral 24 denotes a gear for transmitting the power of the shaft 20 to the gear 25, and reference numeral 25 denotes the power of 24 to the color filter 3. 26 is a gear for transmitting the power of the shaft 20 to the gear 27, 27 is a gear for transmitting the power of the gear 26 to the fan 9, and 9 is a fan for cooling the color filter 3.

Next, the operation will be described with reference to FIG. 8, but the operation is the same as that of the first embodiment up to the point where the light beam 10c necessary for projecting an image is reflected on the side of the projection optical path. Omitted. When the motor 2 rotates, the shaft 20 rotates and the fan 5 and the gears 24 and 26
Rotates. The rotation of the fan 5 draws air from below, blows air upward, and cools the light source 1. The rotation of the gear 24 rotates the color filter 3 via the gear 25.

On the other hand, the color filter is heated by the heat radiation of the light source 1 and the influence of the light beam 10a. Therefore, in cooling the color filter 3, the power of the gear 26 is transmitted to the gear 27 to rotate the fan 9. The color filter is cooled by blowing the wind sucked from the left side to the color filter 3 by the rotation of the fan 9.

With the above-described method, the power of the motor 2 can be shared as the power of the fan 5, the color filter 3, and the fan 9, and the cooling of the light source 1, the rotation of the color filter 3,
The color filter 3 can be cooled, and the size and power consumption of the projection device can be reduced.

[Eighth Embodiment] An example of this embodiment will be described below with reference to the drawings.

FIG. 9 is a block diagram of a projection device according to claims 1 and 8 of the present invention.

Hereinafter, the configuration of the projection apparatus will be described with reference to FIG. 9. The light source 1, the light beam 10a, the motor 2, the color filter 3, the light beam 10b, the spatial modulator 4, the light beam 10c,
The pump 100, the tube 101, and the liquid 102 are the same as those in the first embodiment, and the description is omitted. 2
0 indicates that the rotational power of the motor 2 is
, A gear for transmitting the power of the shaft 20 to the gear 22, and a gear 22 for transmitting the power of the gear 21 to the fan 5.
And a fan 5 for cooling the light source 1.

Next, the operation will be described. The operation is performed until the light beam 10c necessary for projecting an image is reflected toward the projection optical path and the liquid 102 is forcibly circulated by the power of the motor 2. The description is omitted because it is the same as in the first embodiment. The rotation of the motor 2 is transmitted to the fan 5 via the gear 21 and the gear 22. When the fan 5 rotates, the air cooled by the tube 101 is blown to the light source 1, and the air heated by the heat exchange by the light source 1 is sucked by the fan 5 and discharged upward.
Since the liquid 102 sealed in the tube 101 is circulated by the pump 100, the liquid 102 heated by heat exchange in the vicinity of the light source 1 radiates heat in an area away from the light source 1 and is cooled. When flowing, the temperature of the light source 1 drops to about room temperature, and the wind for cooling the light source 1 can be cooled to about room temperature, so that the cooling of the light source 1 is performed efficiently.

Further, in order to efficiently cool the wind that cools the light source, the heat exchange is efficiently performed by dividing the tube in the vicinity of the heat exchange. Light source 1
In order to cool the light source 1, after exchanging heat with the tube 101 on the fan side as a method not shown here, the light source 1 can be efficiently cooled by blowing air.

In the above-described manner, the power of the motor 2 can be shared as the power of the color filter 3, the fan 5, and the pump 100, and the rotation of the color filter 3 and the cooling of the light source 5 can be performed. The miniaturization and power saving of the projection device can be realized.

[0063]

As described above, according to the present invention, according to the first to third aspects, the power for rotating the color filter and the power for the means for cooling the light source are shared, thereby projecting. It is possible to reduce the size of the device or save power. Furthermore, according to the inventions of claims 4 and 5, by controlling the wind for cooling the light source and efficiently blowing it to the light source, it is possible to reduce the size of the fan and the rotation speed of the fan, and further project the image. The device can be reduced in size or power can be saved. According to the invention of claim 6, by increasing the wind speed of the wind generated by the fan for cooling the light source, the light source is more efficiently cooled,
Similarly, miniaturization and power saving of the projection device can be realized. According to the seventh aspect of the present invention, the power for rotating the color filter, the power for cooling the light source, and the power for cooling the color filter are shared, thereby further reducing the size and power consumption of the projection device. It becomes possible. According to the eighth aspect of the present invention, the power of the fan for cooling the light source and the power of the pump for circulating the liquid in the tube for cooling the light source are shared, thereby providing a wind for cooling the light source. It is possible to cool the light source efficiently by using a fan while always keeping the temperature near normal temperature, and it is possible to realize the miniaturization of the projection device or the power saving.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a projection device according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a projection device according to a second embodiment of the present invention.

FIG. 3 is a configuration diagram of a projection device according to a third embodiment of the present invention.

FIG. 4 is a configuration diagram of a projection device according to a fourth embodiment of the present invention.

FIG. 5 is a configuration diagram of a projection device according to a fifth embodiment of the present invention.

FIG. 6 is a side view of a fan according to a fifth embodiment of the present invention.

FIG. 7 is a configuration diagram of a projection device according to a sixth embodiment of the present invention.

FIG. 8 is a configuration diagram of a projection device according to a seventh embodiment of the present invention.

FIG. 9 is a configuration diagram of a projection device according to an eighth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Light source 2 ... Motor 3, 30a ... Color filter 4 ... Spatial modulator 5, 9, 30b ... Fan 6 ... Guide plate 7 ... Housing 8 ... Duct 8a: Duct suction port 8b: Duct light source cooling port 10a, 10b, 10c ... Light beam 11, 14 ... Belt 12 ... Belt guide 13, 20, 28 ... Shaft 21, 22, 24, 25, 26, 27: gear 30: color filter with fan 100: pump 101: tube 102: liquid

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI G09F 9/00 360 G09F 9/00 360D

Claims (8)

[Claims] 1. A projection apparatus in which an image is modulated by a spatial light modulator through a color filter in which a light beam emitted from a light source for projecting an image moves, and means for moving the color filter, and cooling the light source. A projection device wherein the power of the means is shared. 2. The projection device according to claim 1, wherein a power for moving the color filter by rotation and a power for circulating a liquid for cooling the light source in the tube are shared. apparatus. 3. The projection device according to claim 1, wherein power for moving the color filter by rotation and power for a fan that generates wind for cooling the light source are shared. 4. The projection device according to claim 1, wherein the power for rotating the color filter and the power for a fan that generates wind for cooling the light source are shared to efficiently cool the light source. And a guide plate for changing a wind direction for cooling. 5. The projection device according to claim 1, wherein power for moving the color filter by rotation and power for a fan that generates wind for cooling the light source are shared to efficiently cool the light source. A projection device, wherein a duct is used for controlling cooling air. 6. The projection device according to claim 5, wherein power for moving the color filter by rotation and power for a fan that generates wind for cooling the light source are shared to efficiently cool the light source. A projection device, wherein a duct is used for controlling cooling air, and an area of a suction opening of the duct is made larger than an area of an opening of a portion for cooling a light source. 7. The projection device according to claim 1, wherein the means for moving the color filter, the power for the means for cooling the light source, and the means for cooling the color filter are shared. apparatus. 8. The projection apparatus according to claim 1, wherein a power for circulating a liquid for cooling the light source in the tube, and a power for a means for moving the color filter.
A power source for a means for cooling a color filter is shared.