JP2017181714A - projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projector capable of efficiently cooling a light source device.SOLUTION: A projector comprises: a light source device; an optical modulator modulating light emitted from the light source device; a projection optical device projecting the light modulated by the optical modulator; a cooling fan sucking first cooling gas and feeding out it to the light source device; a light source drive device supplying electric power to the light source device; and a first duct in which second cooling gas cooling the light source drive device circulates. The first duct has an arrangement section where a cooling fan is arranged, and the cooling fan is arranged in the arrangement section so that a suction port sucking the first cooling gas is directed to an opposite side to the first duct.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a projector.

Conventionally, a light source device, a light modulation device that modulates light emitted from the light source device to form an image according to image information, and projection optics that enlarges and projects the formed image onto a projection surface such as a screen A projector including the apparatus is known (for example, see Patent Document 1).
The projector described in Patent Document 1 includes two lamps as light source devices, and the two lamps are arranged in a lamp house. The inside of these two lamps is cooled by an inner cooling fan provided corresponding to each lamp. In addition, the projector includes a power supply unit having a power supply board and a ballast board provided in a power supply cover, and the two lamps are lit by receiving power supply from the ballast board. The projector is provided with a bypass duct that connects the power supply cover and the lamp house. The bypass duct guides the cooling air that has cooled the power supply unit to the light source unit, and the cooling air is mixed with the cooling air drawn in by the outer cooling fan and flows into the lamp house, thereby circulating outside the lamp. The flow rate of the cooling air is increased, and the cooling efficiency of the lamp is improved.

JP 2014-48354 A

By the way, it is preferable that the lamp and the ballast for supplying lighting power (lamp power) to the lamp are arranged at relatively close positions for the convenience of wiring. However, in the projector described in Patent Document 1, the space in which the light source unit is arranged and the space in which the power supply unit is arranged are partitioned by a partition wall, so that such wiring becomes complicated, and these There is a problem that the degree of freedom of layout is limited.
On the other hand, when the partition is removed, the lamp fan that sends the cooling gas to the lamp can easily suck the cooling gas that has cooled the ballast. In this case, there is a problem that the temperature of the cooling air sent to the lamp becomes high and the cooling efficiency of the lamp decreases.

  Further, as described in Patent Document 1, for the convenience of wiring, the ballast is generally arranged at a position relatively close to the power supply board. However, the cooling gas that has cooled the power supply board is used as the ballast. If the ballast is configured to circulate and cool the ballast, the temperature of the cooling gas that cools the ballast also varies depending on the temperature of the power supply board and the ballast according to the driving state of the projector. For this reason, when the lamp is mainly cooled by such a cooling gas, the temperature of the cooling gas is increased or decreased, which makes it difficult to appropriately manage the temperature of the lamp.

  SUMMARY An advantage of some aspects of the invention is to provide a projector capable of efficiently cooling a light source device.

  A projector according to an aspect of the present invention includes a light source device, a light modulation device that modulates light emitted from the light source device, a projection optical device that projects light modulated by the light modulation device, and a first cooling device. A cooling fan that sucks gas and sends it to the light source device; a light source driving device that supplies power to the light source device; and a first duct through which the second cooling gas that has cooled the light source driving device flows. The first duct has an arrangement portion in which the cooling fan is disposed, and the cooling fan has the intake port for sucking the first cooling gas so that the air inlet faces the opposite side to the first duct. It arrange | positions at an arrangement | positioning part, It is characterized by the above-mentioned.

According to such a configuration, when the inlet of the cooling fan is directed to the opposite side of the first duct through which the second cooling gas that has cooled the light source driving device flows, the cooling fan becomes the first cooling gas. Suction of the second cooling gas is suppressed. As a result, the cooling fan can suck the first cooling gas, which has a lower temperature than the second cooling gas, and is stable, and send it to the light source device. Therefore, the light source device can be cooled more stably than when the second cooling gas is sent out.
In addition, since the cooling fan is arranged in the arrangement portion of the first duct, the first duct, the cooling fan, and the light source device can be densely arranged while realizing stable cooling of the light source device. In addition, the installation area of the first duct and the cooling fan in the projector can be reduced as compared with the case where the first duct and the cooling fan are arranged so as not to overlap in plan view. Therefore, an increase in the size of the projector due to the provision of the first duct can be suppressed.
Furthermore, since the cooling fan can be prevented from sucking the second cooling gas that has cooled the light source driving device, the degree of freedom in layout of the light source device can be improved.

In the one aspect, the first duct has a duct forming portion through which the second cooling gas flows, and an upright portion rising from the duct forming portion, and the arrangement portion is located in the upright portion. It is preferable.
According to such a structure, it becomes easy to arrange | position a cooling fan according to the inlet of the light source device into which 1st cooling gas is introduce | transduced by arrange | positioning a cooling fan in the arrangement | positioning part located in the said standing part. Can do. That is, the arrangement position of the cooling fan can be adjusted by the arrangement unit. Therefore, a cooling fan can be arrange | positioned so that 1st cooling gas may distribute | circulate to a light source device efficiently.

In the one aspect, it is preferable that the cooling fan is arranged in the arrangement part with a predetermined interval between the cooling fan and the duct forming part.
According to such a configuration, since the cooling fan can be separated from the flow path of the second cooling gas, even when the heat of the second cooling gas is conducted to the duct forming portion, the heat is hardly transmitted to the cooling fan. can do. Therefore, the temperature rise of the 1st cooling gas sent out from a cooling fan can be suppressed, and a light source device can be cooled more stably.

In the one aspect, the first ducts are located on different surfaces and have a plurality of outlets for discharging the second cooling gas to the outside, and at least one of the plurality of outlets is provided. It is preferable that the second cooling gas discharged from the first duct passes through a predetermined cooling target.
Here, when a plurality of discharge ports are arranged on one surface of the first duct, it is necessary to make the one surface large, and the first duct is enlarged.
On the other hand, according to the above-described configuration, the plurality of discharge ports are located on different surfaces, thereby suppressing the increase in size of the first duct and the area for discharging the second cooling gas (openings of the plurality of discharge ports). (Area) can be easily expanded. Therefore, the exhaust efficiency of the second cooling gas can be reliably and easily increased, and the cooling efficiency of the light source driving device can be increased as compared with the case where the second cooling gas stagnates in the first duct.
Furthermore, the 2nd cooling gas which cooled the light source drive device can be utilized for cooling of the said predetermined | prescribed cooling object. Therefore, the second cooling gas can be used effectively.

In the above aspect, the light source device includes an arc tube, a reflecting mirror having a concave curved reflecting surface that reflects light emitted from the arc tube, and a container that houses the arc tube and the reflecting mirror. The cooling fan sends out the first cooling gas for cooling the arc tube located inside the reflecting mirror, and the second cooling gas discharged from the at least one outlet is the In the reflecting mirror, it is preferable to circulate the opposite side of the reflecting surface to cool the end of the arc tube as the cooling target.
Here, the arc tube generally has a configuration including a light emitting part in which a discharge space for discharging light is formed and a sealing part extending from the light emitting part, and the arc tube has the highest temperature. A site | part is a light emission part. Such a light emitting unit is arranged inside the concave curved reflecting surface in the reflecting mirror. By sending the first cooling gas to the light emitting portion located inside such a reflector, the arc tube can be effectively cooled.
On the other hand, since the second cooling gas is a gas that has cooled the light source driving device, the temperature is likely to be higher than that of the first cooling gas, but the temperature is lower than that of the arc tube during lighting. For this reason, the end of the second cooling gas is circulated through the flow path different from the first cooling gas to the end of the arc tube located on the opposite side of the reflecting surface of the reflecting mirror. The part can be cooled.
Therefore, the cooling efficiency of the entire arc tube included in the light source device can be further improved.

In the one aspect, an exterior casing constituting an exterior, an exhaust duct that is disposed in the exterior casing and into which the first cooling gas and the second cooling gas are flowed, and the exhaust duct that has flowed into the exhaust duct It is preferable to include an exhaust fan that discharges the first cooling gas and the second cooling gas to the outside of the outer casing.
According to such a configuration, the first cooling gas and the second cooling gas are collected by the exhaust duct, and the first cooling gas and the second cooling gas are discharged out of the outer casing by the exhaust fan. According to this, it can suppress that the 1st cooling gas which cooled the light source device and the 2nd cooling gas which cooled the light source drive device stagnate in an exterior housing | casing. Therefore, the discharge efficiency of these cooling gases can be increased, and the cooling efficiency of the light source device and the light source driving device can be increased.

1 is a perspective view showing an external appearance of a projector according to an embodiment of the invention. The perspective view which shows the apparatus main body in the said embodiment. FIG. 2 is a schematic diagram illustrating a configuration of an image forming apparatus in the embodiment. The perspective view which shows the light source device in the said embodiment. The perspective view which shows the light source device in the said embodiment. The perspective view which shows the light source device in the said embodiment. The figure which shows the front part of the container in the said embodiment. The figure which shows the right side part of the container in the said embodiment. The perspective view which shows the duct in the said embodiment. The perspective view which shows the duct in the said embodiment. The figure which shows the cross section of the duct in the said embodiment. The side view which shows the duct in the said embodiment, a fan, a light source accommodating part, and an exhaust duct. The figure which shows the exhaust duct in the said embodiment. The figure which shows the exhaust duct in the said embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[External configuration of projector]
FIG. 1 is a perspective view showing an external appearance of a projector 1 according to the present embodiment.
The projector 1 according to the present embodiment modulates light emitted from a light source device 41 (see FIG. 2) provided therein to form an image according to image information, and the image is a projection surface such as a screen. It is an image display device that projects an enlarged image. As shown in FIG. 1, the projector 1 includes an exterior housing 2 that forms an exterior, and an apparatus main body 3 (see FIG. 2) that is accommodated in the exterior housing 2.
As will be described in detail later, in the projector 1, the duct 73 through which exhaust from the light source driving device 62 (see FIG. 2) that supplies lighting power to the light source device 41 circulates and the air inlet 741 are opposite to the duct 73. One feature is that it has a light source cooling fan 74 disposed in the duct 73 so as to face the side.
Hereinafter, each configuration of the projector 1 will be described.

[Configuration of exterior casing]
The outer casing 2 includes an upper case 2A that constitutes the upper part of the outer casing 2, a lower case 2B that constitutes the lower part, a front case 2C that constitutes the front part, and a rear case 2D that constitutes the rear part. These are combined to form a substantially rectangular parallelepiped shape. The exterior housing 2 includes a top surface portion 21, a bottom surface portion 22, a front surface portion 23, a back surface portion 24, a left side surface portion 25, and a right side surface portion 26. The top surface portion 21 is composed of the upper case 2A and a part of the front case 2C, the bottom surface portion is composed of the lower case 2B, the front surface portion 23 is composed of the front case 2C, and the back surface portion 24 is The rear case 2D is used. Moreover, the left side surface part 25 and the right side surface part 26 are respectively configured by a part of the cases 2A to 2C.

An opening 211 for inserting and removing a light source device 41 to be described later is formed at positions on the back surface 24 side and the left side surface 25 side of the top surface portion 21, and the opening 211 is slidably provided on the left side surface portion 25 side. The lamp cover 212 is closed.
The bottom surface portion 22 is provided with a leg portion 221 (only one leg portion 221 is shown in FIG. 1) that comes into contact with the installation surface.
In the approximate center of the front portion 23, an opening 231 through which an image passes is formed by exposing a part of a projection optical device 46 described later. In addition, an intake port 232 is formed in a portion of the front portion 23 on the right side surface portion 26 side, and an exhaust port 233 is formed in a portion of the left side surface portion 25 side.

In the following description, among the + X direction, + Y direction, and + Z direction orthogonal to each other, the + Z direction is the direction from the back surface portion 24 to the front surface portion 23, and the + Y direction is the direction from the bottom surface portion 22 to the top surface portion 21. , + X direction is a direction from the left side surface portion 25 toward the right side surface portion 26. The direction opposite to the + Z direction is taken as the −Z direction. The same applies to the −X direction and the −Y direction.
Thus, when each direction is prescribed | regulated, the projection direction of the image by the projector 1 turns into a direction in alignment with + Z direction.

[Device configuration]
FIG. 2 is a perspective view showing the apparatus main body 3 arranged in the exterior casing 2. In FIG. 2, only the lower case 2 </ b> B of the exterior housing 2 is illustrated.
The apparatus main body 3 constitutes the main body of the projector 1. As shown in FIG. 2, the apparatus main body 3 includes an image forming apparatus 4, a power supply device 6, and a cooling device 7. In addition, although not shown, the apparatus main body 3 includes a control device that controls the operation of the projector 1.

[Configuration of Image Forming Apparatus]
FIG. 3 is a schematic diagram illustrating the configuration of the image forming apparatus 4.
The image forming apparatus 4 forms and projects an image according to image information under the control of the control device. As shown in FIG. 3, the image forming apparatus 4 includes a light source device 41, an illumination optical device 42, a color separation device 43, a relay device 44, an electro-optical device 45, a projection optical device 46, and an optical component casing 47. These are combined to form a substantially L-shaped optical unit extending in the + X direction and the + Z direction.

The light source device 41 emits light in the + X direction toward the illumination optical device 42. The light source device 41 includes an arc tube 411, a main reflecting mirror 412, a collimating lens 413, and a container 5.
The arc tube 411 is a light source lamp that is lit by lighting power (lamp power) supplied from a light source driving device 62 described later, and is arranged so that the central axis is along the + X direction. The arc tube 411 includes a light emitting portion 4111, a sealing portion 4112 extending from the light emitting portion 4111 in the + X direction, and a sealing portion 4113 extending in the −X direction.
The light emitting unit 4111 is located at the approximate center of the arc tube 411 in the + X direction. In the light-emitting portion 4111, a discharge space and a pair of electrodes are enclosed, and a discharge space is formed between the pair of electrodes to emit discharge light. Note that the pair of electrodes is connected to electrode lines disposed in the sealing portions 4112 and 4113, respectively.

The main reflecting mirror 412 is a reflecting mirror attached to the sealing portion 4113. The main reflecting mirror 412 has a reflecting surface 412A having a concave curved surface shape, and the light emitting portion 4111 is located inside the reflecting surface 412A. The main reflecting mirror 412 reflects the light incident from the light emitting unit 4111 and the light incident after being reflected by the sub-reflecting mirror to the parallel lens 413 side.
The collimating lens 413 collimates the incident light beam and emits it. The collimating lens 413 is attached to the front portion 53 of the container 5 by an attachment member 5E (see FIG. 4).
The configuration of the container 5 will be described in detail later.

The illumination optical device 42 equalizes the illuminance in the plane orthogonal to the central axis of the light beam emitted from the light source device 41. The illumination optical device 42 includes a cinema filter 421, a first lens array 422, a light control device 423, a second lens array 424, a polarization conversion element 425, and a superimposing lens 426 in the order in which light beams from the light source device 41 are incident.
The cinema filter 421 is a filter in which the transmittance of light in a predetermined wavelength band is adjusted, and is a direction orthogonal to the central axis of the light beam emitted from the light source device 41 (the direction connecting the front part 23 and the back part 24, It is configured to be able to advance and retreat along the ± Z direction (to be described later), and is inserted into and removed from the passage region of the light flux. That is, the cinema filter 421 is configured to be switchable between a state in which the cinema filter 421 is disposed on the optical path of the light beam and a state in which the cinema filter 421 is out of the light path of the light beam. Such a cinema filter 421 is arranged so as to be inclined with respect to a plane orthogonal to the central axis (a YZ plane described later). More specifically, the cinema filter 421 is arranged so as to be inclined so that the end on the top surface 21 side is closer to the light source device 41 than the end on the bottom surface 22 side. The cinema filter 421 is advanced and retracted in an inclined state.

The first lens array 422 and the second lens array 424 have a plurality of small lenses corresponding to each other. The first lens array 422 divides the incident light beam into a plurality of partial light beams, and the second lens array 424 together with the superimposing lens 426 divides the plurality of partial light beams into an illuminated area (described later) of the liquid crystal panel 453. Superimposed on the image forming area.
The light control device 423 includes a pair of shielding members that are inserted into and extracted from the optical path of the light flux incident on the second lens array 424 from the first lens array 422, and corresponds to the amount of insertion of the pair of shielding members into the optical path. Thus, the amount of light incident on the second lens array 424 is adjusted.
The polarization conversion element 425 has a function of aligning the polarization direction of the incident light beam.

The color separation device 43 separates the light beam incident from the illumination optical device 42 into three color lights of red (R), green (G), and blue (B). The color separation device 43 includes dichroic mirrors 431 and 432 and a reflection mirror 433.
The relay device 44 is provided on an optical path of red light having a longer optical path than other color lights among the three separated color lights. The relay device 44 includes an incident side lens 441, a relay lens 443, and reflection mirrors 442 and 444.

The electro-optical device 45 modulates the separated color lights according to the image information, and then synthesizes the color lights. The electro-optical device 45 includes a field lens 451 provided for each color light, an incident-side polarizing plate 452, and a liquid crystal panel 453 as a light modulation device (red, green, and blue liquid crystal panels are 453R, 453G, and 453B, respectively). ) And the output side polarizing plate 454, and a cross dichroic prism 455 as a color synthesizing device that synthesizes the modulated color lights to form a projected image.
The projection optical device 46 enlarges and projects the formed projection image along the + Z direction, and displays the projection image on the projection surface. The projection optical device 46 is configured as a combined lens including a plurality of lenses (not shown) and a lens barrel 461 that accommodates the plurality of lenses therein.

As shown in FIG. 2, the optical component housing 47 includes a light source storage portion 471 in which the light source device 41 is disposed, a component storage member 472 in which the optical components such as the cinema filter 421 are disposed, A lid-like member 473 combined with the component storage member 472 and a support member 474 combined with the component storage member 472 and supporting the projection optical device 46 are provided.
As shown in FIG. 3, an illumination optical axis Ax, which is a design optical axis, is set inside the optical component casing 47, and each of the devices 42 to 44 and the field lens 451 is connected to the illumination optical axis Ax. The light source device 41, the configuration of the electro-optical device 45 excluding the field lens 451, and the projection optical device 46, which are arranged at predetermined positions on the optical axis Ax, are arranged on an extension line of the illumination optical axis Ax. For this reason, when the light source device 41 is arranged in the light source storage portion 471, the central axis of the light emitted from the light source device 41 coincides with the illumination optical axis Ax.

[Configuration of light source device container]
4 to 6 are perspective views showing the light source device 41. Specifically, FIG. 4 is a perspective view of the light source device 41 as viewed from above the front side, FIG. 5 is a perspective view of the light source device 41 as viewed from above the back side, and FIG. It is the perspective view which looked at the light source device 41 from the downward direction.
The container 5 is a light source casing in which the arc tube 411 and the main reflecting mirror 412 described above are accommodated and the collimating lens 413 is attached. As shown in FIGS. 4 to 6, the container 5 includes a first main body portion 5 </ b> B located on the light emission side (+ X direction side) in the light source device 41, and a side opposite to the light emission side (−X A container body 5A configured by combining the second body parts 5C located on the direction side), and a duct member 5D that is attached to the container body 5A (first body part 5B) and guides the cooling gas to the arc tube 411. And an attachment member 5E.

  Among these, the first main body portion 5B and the second main body portion 5C constituting the housing body 5A are combined with each other so as to sandwich the arc tube 411 and the main reflecting mirror 412, and thereby light is emitted into the housing body 5A. A tube 411 and a main reflector 412 are arranged. The first main body 5B and the second main body 5C are made of a resin containing a glass filler.

Such a container 5 includes a top surface portion 51, a bottom surface portion 52, a front surface portion 53, a back surface portion 54, a left side surface portion 55, and a right side surface portion 56. Among these, the top surface portion 51 and the bottom surface portion 52 are respectively configured by the housing body 5A and the duct member 5D. Further, the front portion 53 is configured by the first main body portion 5B and the attachment member 5E, and the back surface portion 54 is configured by the second main body portion 5C. Further, the left side surface portion 55 is configured by the housing body main body 5A, and the right side surface portion 56 is configured by the housing body main body 5A and the duct member 5D.
When the light source device 41 is disposed in the light source storage portion 471, the light source device 41 has the top surface portion 51 facing the top surface portion 21 side (+ Y direction side) and the bottom surface portion 52 is the bottom surface portion 22. The left side portion 55 faces the front portion 23 side (+ Z direction side), and the right side portion 56 faces the back portion 24 side (−Z direction side). That is, the light source device 41 emits light from the left side surface portion 25 side (−X direction side) to the right side surface portion 26 side (+ X direction side).
Among these, as shown in FIG. 4, the top surface part 51 has a handle 511 for gripping the light source device 41 when the light source device 41 is inserted into and extracted from the light source storage unit 471.

FIG. 7 is a view showing the front portion 53 of the container 5.
The front portion 53 constitutes a light emitting surface from which light emitted from the arc tube 411 and reflected by the main reflecting mirror 412 is emitted. The front portion 53 has a passage opening (not shown) through which the light passes, and the collimating lens 413 is disposed by the mounting member 5E so as to close the passage opening. Further, as shown in FIG. 7, the front portion 53 includes four locking portions 531, two positioning pins 532, a guide portion 533, an insertion portion 534, and two fixing portions 535.

As shown in FIG. 7, the locking portion 531 is located in the vicinity of the four corners of the front portion 53. These locking portions 531 are a portion on the + Y direction side, and are protruded toward the + Y direction side at the portion on the + Z direction side and the −Z direction side, respectively, on the −Y direction side, and , And projecting from the + Z direction side and the −Z direction side toward the −Y direction. These locking portions 531 are inserted into the holes 5E2 formed in the four mounting portions 5E1 located at the four corners of the mounting member 5E, whereby the mounting member 5E is held in a state where the parallelizing lens 413 is pressed against the front portion 53. Lock.
The attachment member 5E is a metal leaf spring, and applies an urging force to the collimating lens 413 toward the front portion 53 when attached to the front portion 53. A circular opening 5E3 through which light through the collimating lens 413 passes is formed in the center of the mounting member 5E.

The two positioning pins 532 protrude in the −Y direction side from the positions on the −Y direction side and the positions on the + Z direction side and the −Z direction side. These positioning pins 532 are inserted into holes (not shown) formed in the component storage member 472.
The guide part 533 is located on the −Z direction side. Specifically, the guide part 533 stands on the light emission side (+ X direction side) from the front part 53 and extends from a part on the −Y direction side to a part on the + Y direction side. The guide portion 533 abuts on a guide surface (not shown) of the component storage member 472 formed according to the guide portion 533 and guides the connection between the light source device 41 and the component storage member 472.
The insertion portion 534 stands on the + Z direction side from the position on the + Y direction side and the + Z direction side. The insertion portion 534 is inserted into a groove (not shown) formed in the component storage member 472 and positions the light source device 41 with respect to the component storage member 472 together with the positioning pin 532.

  The two fixing portions 535 are located on the + Y direction side in the front portion 53 and on the + Z direction side and the −Z direction side, respectively, and protrude in the + X direction. These fixing portions 535 have holes (not shown) through which screws SC for fixing the light source device 41 to the component housing member 472 are inserted from the + Y direction side toward the −Y direction side. By fixing the screw SC inserted through these holes to the component storage member 472, the light source device 41 stored in the light source storage portion 471 is combined with the component storage member 472.

Here, the duct member 5D will be described.
As shown in FIGS. 4, 7, and 8, the duct member 5D has a substantially C shape, and the + X direction in the first main body 5B along the circumferential direction centering on the central axis of the arc tube 411. It is attached to the side position. That is, the duct member 5D is located on the + X direction side of the light emitting part 4111 located at the center in the + X direction in the arc tube 411 indicated by a two-dot chain line in FIGS. 7 and 8, and the first body part 5B is placed in the −Z direction. It attaches so that it may cover from the side, + Y direction side, and -Y direction side. Thereby, the flow path through which cooling gas (1st cooling gas mentioned later) distribute | circulates is formed by the outer surface of 1st main-body part 5B, and the inner surface of duct member 5D.
Such a duct member 5D includes an introduction port 5D1, a flow path switching member 5D2, a first air guide portion 5D3, and a second air guide portion 5D4.

The introduction port 5D1 is located on the right side surface portion 56 that is a surface on the −Z direction side, and is connected to a delivery port 742 of the fan 74 described later. Then, the inlet 5D1 introduces the cooling gas sent from the fan 74 to the + Z direction side through the outlet 742 into the duct member 5D.
The flow path switching member 5D2 is disposed inside the duct member 5D corresponding to the introduction port 5D1 and at a branch portion of the air guide portions 5D3 and 5D4.

The first air guide portion 5D3 extends from the branch portion to the + Y direction side along the right side surface portion 56 and then extends to the + Z direction side along the top surface portion 51. An outlet (not shown) for sending the cooling gas to the arc tube 411 is formed at the position of the first main body 5B corresponding to the terminal portion 5D31 of the first air guide 5D3.
The second air guide portion 5D4 extends from the branch portion to the −Y direction side along the right side surface portion 56, and then extends to the + Z direction side along the bottom surface portion 52. An outlet (not shown) for sending the cooling gas to the arc tube 411 is also formed at the position of the first main body portion 5B corresponding to the terminal portion 5D41 of the second air guide portion 5D4.

Then, the flow path switching member 5D2 closes at least a part of the air guide portion located on the lower side in the vertical direction among the air guide portions 5D3 and 5D4, thereby making the air guide portion located on the upper side in the vertical direction. The cooling gas introduced into the duct member 5D is guided. Accordingly, the cooling gas is sent from the upper side in the vertical direction to the arc tube 411, and the upper part in the vertical direction of the light emitting unit 4111 is cooled.
When the cooling gas flows through the first air guiding portion 5D3, the first air guiding portion 5D3 is located on the upper side in the vertical direction with respect to the arc tube 411. 411 is sent from the upper side. The same applies to the case where the cooling gas flows through the second air guide portion 5D4.

FIG. 8 is a view showing the right side surface portion 56 of the container 5.
As shown in FIGS. 4, 6, and 8, the duct member 5 </ b> D is attached to the portion of the right side surface 56 on the front surface 53 side, and the introduction port 5 </ b> D <b> 1 is positioned as described above. In addition, a connector CN connected to a connector (not shown) disposed in the light source storage portion 471 is provided at the approximate center of the right side surface portion 56. Two lead wires LE that supply the supplied lighting power to the arc tube 411 are connected to the connector CN.
Furthermore, an opening 561 is located at a portion of the right side surface portion 56 on the back surface portion 54 side. The opening 561 is an opening that takes in a cooling gas that cools the rear side (−X direction side) portion of the main reflecting mirror 412 and the sealing portion 4113 of the arc tube 411. Part of the cooling gas that has flowed through the duct 73 is introduced.

As shown in FIG. 8, rectifying portions 562 and 563 that guide the cooling gas to the end portion 4114 of the sealing portion 4113 in the arc tube 411 are provided inside the opening portion 561 so as to face each other. More specifically, the rectifying portions 562 and 563 are end portions of the sealing portion 4113 exposed from the main reflecting mirror 412 to the side opposite to the light emitting side (the reflecting surface 412A side) when viewed from the position facing the right side surface portion 56. 4114 is arranged so as to be sandwiched from the + Y direction side and the −Y direction side.
These rectifying units 562 and 563 are inclined in the direction approaching the end 4114 toward the + Z direction side, and the closest position is a position that sandwiches the end 4114 from the + Y direction side and the −Y direction side. Is set to For this reason, a part of the cooling gas introduced from the opening 561 flows to the end 4114 along the rectifying parts 562 and 563. In such an end portion 4114, an electrode wire located in the sealing portion 4113 and connected to the lead wire extending from the connector CN is exposed. Since the flow velocity of the cooling gas flowing through the exposed portion of the electrode wire is increased by the rectifying units 562 and 563, the cooling efficiency of the exposed portion can be improved.

As shown in FIG. 5, the left side surface portion 55 discharges the cooling gas, which has been guided into the housing 5 through the duct member 5 </ b> D and cooled the arc tube 411, to the + X direction side. An exhaust port 551 is provided. The cooling gas discharged from the exhaust port 551 is introduced into an exhaust duct 75 described later.
Further, the left side surface portion 55 is an opening portion that discharges the cooling gas that has cooled the portion on the opposite side to the reflection surface 412A side of the end portion 4114 and the main reflection mirror 412 to the portion on the −X direction side. 552 is located. The cooling gas discharged through the opening 552 is taken into the exhaust duct 75 as described above.

[Configuration of power supply unit]
As shown in FIG. 2, the power supply device 6 is disposed along the back surface portion 24 at a position on the −Z direction side with respect to the image forming apparatus 4 in the space in the exterior housing 2. The power supply device 6 includes a power supply block 61 and a light source driving device 62 that is a so-called ballast.
The power supply block 61 converts the commercial AC current supplied from the outside via a power cable CA connected to an inlet connector (not shown) disposed on the bottom surface portion 22 into a DC current, and configures the electronic device constituting the projector 1. A current boosted and lowered according to the component is supplied to the electronic component. Such a power supply block 61 includes a power supply board (not shown) on which the AC / DC conversion circuit and the voltage conversion circuit are mounted, a shield 611 that covers the power supply board and suppresses leakage of electromagnetic waves from the power supply board, Is provided.

The light source driving device 62 is located on the −X direction side with respect to the power supply block 61. The light source driving device 62 supplies the current supplied from the power supply block 61 to the light source device 41 to light the arc tube 411 included in the light source device 41. Such a light source driving device 62 covers a lighting control board (not shown) on which a step-down circuit, a conversion circuit, and a pulse generation circuit are mounted, a housing body 621 that houses the lighting control board, and the housing body 621. And a shield 622 for suppressing leakage of electromagnetic waves from the lighting control board.
Among these, the step-down circuit is a down chopper circuit, and drops the voltage of the direct current supplied from the power supply block 61 to a voltage suitable for lighting the arc tube 411.
The conversion circuit is an inverter circuit and converts an input direct current into an alternating current. The frequency of the lamp current supplied to the arc tube 411 by this conversion circuit is changed according to the lighting state of the arc tube 411 by the control device.
The pulse generation circuit is an igniter circuit and operates when the arc tube 411 is turned on. Specifically, the pulse generation circuit outputs a high voltage pulse to the arc tube 411 to perform dielectric breakdown between the electrodes, and prompts the arc tube 411 to start lighting. After such a dielectric breakdown is performed, the lighting of the arc tube 411 is maintained by the lamp current supplied by the conversion circuit.

[Configuration of cooling device]
The cooling device 7 circulates a cooling gas to each component of the projector 1 and cools each component. The cooling device 7 sucks a cooling gas from the outside of the exterior casing 2 through the intake duct 71 connected to the intake port 232 and the intake duct 71, and the cooling gas is used for the electro-optical device 45 and the polarization conversion element 425. And a fan (not shown).
In addition, the cooling device 7 includes a fan 72 that cools the power supply device 6, a duct 73 through which the cooling gas that has cooled the light source driving device 62 circulates, a fan 74 that sends the cooling gas to the light source device 41, and an exhaust duct. 75. Among these, the fan 74 supplies the cooling gas for cooling the light source device 41, more specifically, the cooling gas for cooling the light emitting portion 4111 and the sealing portion 4112 of the arc tube 411 included in the light source device 41, to the inlet 5D1. It is a fan sent out to.
In the following description, the cooling gas supplied from the fan 74 to the light source device 41 is the first cooling gas, and the cooling gas that cools the light source driving device 62 and flows through the duct 73 is the second cooling gas.

  The fan 72 is arrange | positioned between the power supply block 61 and the light source drive device 62, and distribute | circulates cooling gas to these. The fan 72 is formed of a sirocco fan, the air inlet is opposed to one end of the power supply block 61 (on the left side portion 25 side, the end portion on the front portion 23 side), and the outlet is one end (right side portion) 26 side end). When such a fan 72 is driven, the cooling gas in the exterior housing 2 flows from the + X direction side to the −X direction side through the shield 611 of the power supply block 61 due to the suction force of the fan 72, thereby The power supply block 61 is cooled. The cooling gas that has cooled the power supply block 61 is sucked by the fan 72 and sent to the light source driving device 62, and the cooling gas flows from the + X direction side to the −X direction side in the light source driving device 62.

[Duct structure]
9 and 10 are perspective views showing the duct 73. FIG. Specifically, FIG. 9 is a perspective view of the duct 73 as viewed from the back surface portion 24 side and the top surface portion 21 side, and FIG. 10 illustrates the duct 73 at the front surface portion 23 side and the top surface portion 21 side. It is the perspective view seen from.
The duct 73 corresponds to the first duct of the present invention, and is disposed along the + X direction between the light source device 41 and the inner surface of the back surface portion 24 as shown in FIG. The duct 73 is connected to the light source driving device 62 and attached to the inner surface of the bottom surface portion 22, and the second cooling gas that has cooled the light source driving device 62 by the inner surface and the inner surface of the duct 73 (duct forming portion 734). A flow path through which is circulated is formed. As shown in FIGS. 9 and 10, the duct 73 includes a fixing portion 731, a pair of connection portions 732, an opening portion 733, a duct forming portion 734, an upright portion 735, an arrangement portion 736, a first discharge port 737, and A second discharge port 738 is provided.

The fixing portion 731 is a portion that fixes the duct 73 to the inner surface of the bottom surface portion 22, and a plurality of fixing portions 731 are provided on the outer peripheral portion of the duct 73. These fixing portions 731 have holes 7311 through which screws (not shown) fixed to the inner surface of the bottom surface portion 22 are inserted. Of the plurality of fixing portions 731, two fixing portions 731 located on the −X direction side and the + Z direction side are hole portions into which positioning protrusions (not shown) provided on the inner surface of the bottom surface portion 22 are inserted. 7312.
The pair of connection portions 732 are positioned at the end portion on the + X direction side in the duct 73, and are connected to the end portion on the −X direction side in the housing 621 of the light source driving device 62.
The opening 733 is located inside the pair of connection parts 732, and the second cooling gas is introduced into the duct formation part 734 through the openings 733.

FIG. 11 is a view of the cross section of the duct 73 in the XY plane at the approximate center in the + Z direction as viewed from the + Z direction side.
The duct forming portion 734 includes a side surface portion 7341 along the XY plane, a side surface portion 7342 along the YZ plane, and a top surface portion 7343 substantially along the XZ plane intersecting with the side surface portions 7341 and 7342, and the inside is the first. 2 Form a duct (flow path) through which the cooling gas flows in the −X direction.
The side surface portion 7341 is located on the −Z direction side, and the side surface portion 7342 is located on the −X direction side. These side surface parts 7341 and 7342 become wall parts that stand up from the inner surface when the duct 73 is attached to the inner surface of the bottom surface part 22.
The top surface portion 7343 faces the inner surface when the duct 73 is attached to the inner surface of the bottom surface portion 22. As shown in FIG. 11, the top surface portion 7343 extends along the XZ plane after being inclined toward the −Y direction side (the inner surface side of the bottom surface portion 22) toward the −X direction side.

  The standing portion 735 stands up in the + Y direction side from the surface 7343A on the + Y direction side in the top surface portion 7343, and is formed in a substantially circular shape when viewed from the + Y direction side. That is, the standing portion 735 stands up from the surface 7343A according to the outer shape of the fan 74 that is a sirocco fan. An arrangement portion 736 is located at the standing direction tip (+ Y direction tip) of the standing portion 735.

As shown in FIG. 2, the arrangement part 736 is a part where the fan 74 for sending the first cooling gas to the introduction port 5D1 is arranged. The arrangement portion 736 has three fixing portions 7361 on the outer peripheral portion. These fixing portions 7361 have screw holes 7362 into which screws (not shown) through which the fans 74 are inserted are screwed. In addition, the two fixing portions 7361 have positioning protrusions 7363 inserted into the fan 74.
In such an arrangement portion 736, the fan 74 is arranged such that the intake port 741 faces the + Y direction side and the delivery port 742 is connected to the introduction port 5D1. When arranged in the arrangement part 736, the end part (the end part on the −Y direction side) of the fan 74 opposite to the intake port 741 side is arranged in the standing part 735. The fan 74 sucks the cooling gas on the side opposite to the duct 73 with respect to the fan 74 (cooling gas located mainly on the + Y direction side with respect to the fan 74), and the cooling gas is the first cooling gas. Is sent toward the inlet 5D1 located on the + Z direction side.

  Here, the second cooling gas flowing in the duct forming portion 734 is shielded by the top surface portion 7343 and does not flow into the standing portion 735. A space is provided between the fan 74 and the duct forming portion 734 by the dimension in the + Y direction of the upright portion 735. For this reason, the heat of the second cooling gas that has cooled the light source driving device 62 is suppressed from being conducted to the fan 74, and the second cooling gas is suppressed from being sucked by the fan 74.

FIG. 12 is a side view of the duct 73, the fan 74, the light source storage portion 471, and the exhaust duct 75 viewed from the −X direction side.
As shown in FIG. 10, the first outlet 737 is a substantially rectangular opening formed at the end of the duct 73 on the + Z direction side. As shown in FIG. 12, the first discharge port 737 has a part on the −Y direction side that opens below the light source storage part 471, and a part on the + Y direction side includes the light source storage part 471, the light source device 41, and the like. There is an opening between. For this reason, of the second cooling gas that has passed through the duct forming portion 734, a part of the second cooling gas discharged from the first discharge port 737 is the bottom of the light source storage portion 471 (the end on the −Y direction side). ) And the inner surface of the bottom surface portion 22 in the + Z direction side, and flows into an exhaust duct 75 described later.

As shown in FIGS. 9 and 10, the second discharge port 738 is a substantially triangular opening formed in a portion of the top surface portion 7343 on the −X direction side from the standing portion 735. From this second discharge port 738, a part of the second cooling gas that has circulated in the duct forming portion 734 is discharged to the + Y direction side.
Such a second discharge port 738 is located on the −Z direction side with respect to the opening 561 (see FIG. 8) of the light source device 41, and the second cooling gas discharged from the second discharge port 738. Flows into the opening 561 through the opening (not shown) of the light source storage 471. As described above, the second cooling gas is guided to the end 4114 by the rectifying units 562 and 563 and cools the end 4114.
Note that the second cooling gas is a gas after the power supply block 61 is cooled in addition to the light source driving device 62, and thus has a higher temperature than the gas outside the exterior casing 2. However, the temperature of the second cooling gas is lower than the temperature of the end 4114 in the arc tube 411. For this reason, the said edge part 4114 can be reliably cooled by 2nd cooling gas.
Note that the second cooling gas that has cooled the end portion 4114 is discharged out of the housing 5 from the opening 552 (see FIG. 5) of the left side surface portion 55 and flows into the exhaust duct 75 as described above.

[Exhaust duct configuration]
FIG. 13 is a view of the exhaust duct 75 as viewed from the + Y direction side. FIG. 14 is a view of the exhaust duct 75 as seen from the −Y direction side.
As shown in FIG. 2, the exhaust duct 75 is disposed between the inner surface of the front portion 23 and the light source storage portion 471, and circulates in the exterior housing 2 to cool each cooling target (for example, the light source device 41). This is a duct for discharging the cooling gas to the outside of the exterior casing 2 through the exhaust port 233. In the exhaust duct 75, as shown in FIG. 12, an exhaust fan 76 that is an axial fan is disposed.
As shown in FIGS. 12 to 14, the exhaust duct 75 includes a plurality of fixing portions 751, three introduction ports 752 to 754, and one exhaust port 755.

The plurality of fixing portions 751 are provided on the outer peripheral portion of the exhaust duct 75. These fixing portions 751 have holes through which screws (not shown) fixed to the inner surface of the bottom surface portion 22 are inserted.
The introduction port 752 is located at the end on the −Z direction side in the exhaust duct 75. The first cooling gas discharged from the exhaust port 551 of the light source device 41 and the second cooling gas discharged from the opening 552 are introduced into the exhaust duct 75 through the introduction port 752.
Three inlets 753 are formed on the surface of the exhaust duct 75 on the + Y direction side, and three inlets 754 are formed on the surface of the exhaust duct 75 on the −Y direction side. A cooling gas that has cooled another part of the light source device 41 or another cooling target is introduced into the exhaust duct 75 through the inlets 753 and 754. For example, the second cooling gas discharged from the first discharge port 737 is introduced into the exhaust duct 75 through the introduction port 754 through the lower part of the light source storage portion 471.

  The exhaust port 755 is formed at the end of the exhaust duct 75 on the + Z direction side and is connected to the exhaust port 233. Through these exhaust ports 755 and 233, the cooling gas introduced into the exhaust duct 75 through the respective inlet ports 752 to 754 by driving the exhaust fan 76 is discharged out of the exterior casing 2 by the exhaust fan 76. The

[Effect of the embodiment]
The projector 1 according to the present embodiment described above has the following effects.
The air inlet 741 of the fan 74 disposed in the duct 73 faces the side opposite to the duct 73 through which the second cooling gas flows. According to this, it can suppress that the fan 74 attracts | sucks the 2nd cooling gas which cooled the light source drive device 62 as cooling gas (1st cooling gas) sent to the light source device 41. FIG. Therefore, the fan 74 can suck the cooling gas whose temperature is more stable than the second cooling gas as the first cooling gas and send it to the light source device 41. Therefore, the light source device 41 can be cooled efficiently and stably.
Further, by arranging the fan 74 in the arrangement portion 736 of the duct 73, the duct 73, the fan 74, and the light source device 41 can be arranged densely while exhibiting the above effects. Therefore, an increase in the size of the projector 1 due to the provision of the duct 73 can be suppressed. That is, when the duct 73 is provided, the fan 74 is arranged in the arrangement portion 736 of the duct 73 as compared with the case where the duct 73 and the fan 74 are arranged in a plane (along the inner surface) on the inner surface of the bottom surface portion 22. By doing so, the enlargement of the projector 1 can be suppressed.
Further, since the fan 74 can be prevented from sucking the second cooling gas, the degree of freedom in the arrangement (layout) of the light source device 41 can be improved.

  The duct 73 includes a duct forming portion 734 through which the second cooling gas flows and an upright portion 735 that rises from the top surface portion 7343 of the duct forming portion 734, and the arrangement portion 736 of the fan 74 is the upright portion 735. Located in. According to this, since the height position of the fan 74 from the inner surface of the bottom surface portion 22 is adjusted, the fan 74 can be easily arranged so that the introduction port 5D1 and the delivery port 742 of the light source device 41 are connected. Can do. Therefore, the fan 74 can be arranged so that the cooling gas can efficiently flow to the light source device 41.

  The fan 74 is arranged in the arrangement portion 736 with a predetermined interval between the fan 74 and the duct forming portion 734 by the standing portion 735. According to this, even when the heat of the second cooling gas is conducted to the duct forming part 734, the heat can be made difficult to be transmitted to the fan 74. Therefore, the temperature rise of the 1st cooling gas sent to the light source device 41 can be suppressed, and the light source device 41 can be cooled more stably.

Here, when the 1st discharge port 737 and the 2nd discharge port 738 are located in one surface in the duct 73, it is necessary to enlarge the said one surface, and the duct 73 becomes large.
On the other hand, the duct 73 has a first discharge port 737 and a second discharge port 738 that are located on different surfaces of the duct 73 and discharge the second cooling gas, respectively. According to this, the opening area of the discharge ports 737 and 738 can be expanded while suppressing the enlargement of the duct 73. Accordingly, the exhaust efficiency of the second cooling gas from the duct 73 can be reliably and easily increased, and the second cooling gas can be discharged without stagnation, so that the cooling efficiency of the light source driving device 62 can be increased.
Further, the second cooling gas discharged from the duct 73 through the second discharge port 738 flows to the end portion 4114 of the arc tube 411 included in the light source device 41 as a cooling target, so that the light source driving device 62 is cooled. The second cooling gas can be used for cooling the end portion 4114. Therefore, the cooling gas can be effectively used.

Here, the highest temperature portion of the arc tube 411 is the upper portion in the vertical direction of the light emitting portion 4111. Such a light emitting unit 4111 is disposed inside the concave curved reflecting surface 412A in the main reflecting mirror 412. When the first cooling gas sent out by the fan 74 is circulated through the light emitting unit 4111 located inside the main reflecting mirror 412, the light emitting unit 4111 can be effectively cooled.
On the other hand, the second cooling gas that has cooled the light source driving device 62 tends to be higher in temperature than the cooling gas around the fan 74, but is lower in temperature than the arc tube 411 at the time of lighting. For this reason, the arc tube 411 can be cooled more effectively by flowing the second cooling gas through the end 4114 and cooling the end 4114.
Therefore, the cooling efficiency of the light source device 41 can be further improved.

  In the exterior housing 2 constituting the exterior, an exhaust duct 75 into which each cooling gas that has cooled the light source device 41 and the light source driving device 62 flows, and each cooling gas that has flowed into the exhaust duct 75 is contained in the exterior housing. An exhaust fan 76 that discharges outside the body 2 is provided. According to this, the 1st cooling gas and the 2nd cooling gas can be discharged outside, without making it stagnate in exterior case 2. Therefore, the discharge efficiency of these cooling gases can be increased, and the cooling efficiency of the light source device 41 and the light source driving device 62 can be increased.

[Modification of Embodiment]
The present invention is not limited to the above-described embodiment, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
In the above embodiment, the fan 74 as a cooling fan is disposed in the disposition portion 736 provided at the tip portion of the standing portion 735 that rises in the + Y direction from the top surface portion 7343 of the duct 73 as the first duct. However, the present invention is not limited thereto, and such a standing portion 735 may not be provided, and the fan 74 is predetermined between the duct forming portion 734 through which the cooling gas (second cooling gas) that has cooled the light source driving device 62 flows. It is not necessary to leave an interval. For example, the arrangement | positioning part 736 which has the fixing | fixed part 7361 grade | etc., May be provided in the top | upper surface part 7343. Further, the arrangement position of the fan 74 with respect to the duct 73 is not limited to the position on the + Y direction side with respect to the duct 73, and is arranged at another position unless the fan 74 sucks the second cooling gas flowing through the duct 73. May be.

  In the above-described embodiment, the duct 73 has the first discharge port 737 and the second discharge port 738 that discharge the second cooling gas that has circulated through the duct forming portion 734. However, the present invention is not limited to this, and the duct 73 may have one or three or more discharge ports from which the second cooling gas is discharged. Moreover, even when the duct 73 has a plurality of outlets, each outlet may be arranged on one surface.

  In the above embodiment, the second cooling gas discharged from the second discharge port 738 is introduced into the housing 5 through the opening 561 of the housing 5 and cools the end 4114 of the arc tube 411. . However, the present invention is not limited to this, and the second cooling gas may not be circulated to the end portion 4114. In this case, the second cooling gas may be circulated to other parts of the light source device 41 such as the connector CN, or may be circulated to other cooling objects.

  In the above embodiment, the cooling device 7 disposed in the exterior casing 2 has the exhaust duct 75 and the exhaust fan 76. However, the present invention is not limited thereto, and at least one of the exhaust duct 75 and the exhaust fan 76 may be omitted as long as the cooling gas that has cooled the light source device 41 and the light source driving device 62 can be discharged out of the outer casing 2.

In the above embodiment, the light source device 41 includes the duct member 5D attached to the housing body 5A, and the duct member 5D includes the introduction port 5D1, the flow path switching member 5D2, the first air guide portion 5D3, and the second guide. The wind part 5D4 is assumed to be included. However, the present invention is not limited to this, and the flow path switching member 5D2 and one of the first air guide portion 5D3 and the second air guide portion 5D4 may be omitted. That is, when the projector 1 is used only in one of the normal position and the reverse position, the duct portion and the flow path switching member positioned on the lower side in the vertical direction with respect to the arc tube 411 are not necessary. Good.
On the other hand, the duct member 5D may include a number of duct portions corresponding to the installation postures that the projector 1 can take. As such an installation posture, in addition to the normal placement posture and the reverse placement posture in which the projection direction of the image is substantially along the horizontal direction, the upper projection posture in which the projection direction faces the upper side in the vertical direction, and the projection direction is lower in the vertical direction. And a vertically long projection posture in which one of the left side surface portion 25 and the right side surface portion 26 faces the upper side in the vertical direction.

In the above embodiment, the projector 1 includes the three liquid crystal panels 453 (453B, 453G, and 453R) as the light modulation device. However, the present invention is not limited to this, and the present invention can also be applied to a projector including two or less or four or more liquid crystal panels.
In the above embodiment, the image forming apparatus 4 is configured to have a substantially L shape in plan view. However, the present invention is not limited to this, and the image forming apparatus 4 may have a configuration having another shape such as a configuration having a substantially U shape in plan view. The optical components applied to the image forming apparatus 4 are not limited to the above, and can be changed as appropriate.

In the above embodiment, a transmissive liquid crystal panel 453 having a different light incident surface and light emitting surface is used as the light modulation device. However, the present invention is not limited to this, and a reflective liquid crystal panel in which the light incident surface and the light emitting surface are the same may be employed as the light modulation device. In addition, as long as the light modulation device can modulate an incident light beam and form an image according to image information, a device using a micromirror, for example, a device using a DMD (Digital Micromirror Device) or the like can be used. A light modulation device may be used.
In the above-described embodiment, the light source device 41 includes the arc tube 411 as a light source and the main reflector 412 that is a reflector that reflects the light emitted from the arc tube 411. However, the present invention is not limited to this, and the light source may have a solid light source such as an LED (Light Emitting Diode) or an LD (Laser Diode). Further, when the arc tube 411 is employed, the light emitting unit 4111 covers a part of the light emitting unit 4111 opposite to the main reflecting mirror 412 side, and reflects light incident from the light emitting unit 4111 to the main reflecting mirror 412 side. A sub-reflecting mirror may be provided. Further, the number of light source devices may be two or more.

  In the above embodiment, the light source device 41, the fan 74 that sends the first cooling gas to the light source device 41, the light source driving device 62 that supplies power to the light source device 41 to light the light source device 41, and the light source driving The duct 73 in which the second cooling gas that has cooled the device 62 circulates is applied to the projector 1, and an arrangement portion 736 in which the fan 74 is arranged is provided in the duct 73, and the intake port 741 is the duct 73 (duct formation). The fan 74 is arranged in the arrangement portion 736 so as to face the side opposite to the portion 734). However, such a configuration is not limited to the projector, and may be applied to other electronic devices such as a lighting device.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 2 ... Exterior casing, 22 ... Bottom part, 23 ... Front part, 24 ... Back part, 25 ... Left side part, 26 ... Right side part, 3 ... Apparatus main body, 4 ... Image forming apparatus, 41 ... Light source device 411 ... arc tube, 4114 ... end, 412 ... main reflecting mirror (reflecting mirror), 412A ... reflecting surface, 45 ... electro-optical device, 453 (453B, 453G, 453R) ... liquid crystal panel (light modulating device), 46 DESCRIPTION OF SYMBOLS Projection optical apparatus, 47 ... Optical component housing, 471 ... Light source housing, 472 ... Component housing member, 473 ... Lid member, 5 ... Housing, 51 ... Top surface, 54 ... Back surface, 561 ... Opening , 6 ... Power supply device, 61 ... Power supply block, 611 ... Shield, 62 ... Light source drive device, 621 ... Housing, 622 ... Shield, 7 ... Cooling device, 71 ... Intake duct, 72 ... Fan, 73 ... Duct (first Duct), 734 ... ,... Standing part, 736... Arrangement part, 737... First discharge port (plural discharge ports), 738... Second discharge port (plural discharge ports), 74... Fan (cooling fan), 741. Inlet port, 742 ... outlet port, 75 ... exhaust duct, 752, 753 ... opening, 755 ... exhaust port, 76 ... exhaust fan, CA ... cable.

Claims (6)

A light source device;
A light modulation device that modulates light emitted from the light source device;
A projection optical device for projecting light modulated by the light modulation device;
A cooling fan for sucking the first cooling gas and sending it to the light source device;
A light source driving device for supplying power to the light source device;
A first duct through which the second cooling gas that has cooled the light source driving device flows, and
The first duct has an arrangement part in which the cooling fan is arranged,
The projector according to claim 1, wherein the cooling fan is arranged in the arrangement portion such that an intake port for sucking the first cooling gas faces a side opposite to the first duct. The projector according to claim 1.
The first duct is
A duct forming part through which the second cooling gas flows;
An upright portion that rises from the duct forming portion,
The projector is characterized in that the arrangement part is located on the standing part. The projector according to claim 2,
The projector according to claim 1, wherein the cooling fan is disposed in the arrangement portion with a predetermined interval between the cooling fan and the duct formation portion. In the projector as described in any one of Claims 1-3,
The first ducts are located on different surfaces, and have a plurality of discharge ports for discharging the second cooling gas to the outside.
The projector, wherein the second cooling gas discharged from the first duct through at least one of the plurality of discharge ports circulates to a predetermined cooling target. The projector according to claim 4,
The light source device is
Arc tube,
A reflecting mirror having a concave curved reflecting surface for reflecting the light emitted from the arc tube;
A housing for housing the arc tube and the reflecting mirror,
The cooling fan sends out the first cooling gas for cooling the arc tube located inside the reflecting mirror,
The second cooling gas discharged from the at least one discharge port circulates on a side opposite to the reflecting surface in the reflecting mirror and cools an end portion of the arc tube as the cooling target. Projector. The projector according to any one of claims 1 to 5,
An exterior casing constituting the exterior; and
An exhaust duct disposed in the exterior housing and into which the first cooling gas and the second cooling gas flow;
A projector comprising: an exhaust fan that discharges the first cooling gas and the second cooling gas that have flowed into the exhaust duct to the outside of the outer casing.

Images