JP2019040074A - projector - Google Patents

Abstract

To provide a small projector that efficiently cools an optical modulation device.SOLUTION: The projector includes: a first fan having an inlet for sucking air and an outlet to deliver air; a first flow passage 6Sa for guiding the air delivered from the outlet to an optical modulation device 34; a second flow passage 6Sb for circulating the air that cooled the optical modulation device 34; a third flow passage 6Sc for guiding the air circulating in the second flow passage 6Sb to the inlet; and a heat sink 512 for radiating heat in the third flow passage 6Sc. When a direction orthogonal to the optical axis direction of a projection optical device is regarded as a first direction and a direction orthogonal to the optical axis direction and to the first direction is regarded as a second direction, the first flow passage 6Sa is disposed on one side in the first direction with respect to the projection optical device, the second flow passage 6Sb is disposed on the other side in the first direction with respect to the projection optical device, and the third flow passage 6Sc is disposed on one side in the second direction with respect to the projection optical device.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a projector.

  2. Description of the Related Art Conventionally, a projector that includes a light source, a light modulation device, and a projection optical device and projects an image on a projection surface such as a screen is known. In the projector, since the heat generation of the light modulation device to which the light emitted from the light source is incident becomes remarkable, it is desired to efficiently cool the light modulation device. As a technique for cooling the light modulation device, a projector using a method of circulating air has been proposed (see, for example, Patent Document 1).

The projector described in Patent Document 1 includes an air cooling unit that cools the light modulation device.
The air cooling unit includes a circulation fan, and a plurality of duct members (downstream duct member, connection duct member, and upstream duct member) that form an annular air flow path together with the optical component housing that houses the light modulation device, A heat exchanger.
The circulation fan circulates air through the annular air flow passage. The downstream duct member guides the air flowing from the space at the position where the light modulation device is arranged inside the optical component casing to the connection duct member. The connecting duct member is disposed on the back side of the optical component casing, and guides the air flowing through the downstream duct member to the upstream duct member. The upstream duct member is disposed on the lower side of the optical component casing, houses the circulation fan, and guides the air circulated through the connection duct member to the space where the light modulator is disposed. The heat exchanger is installed in the connection duct member, receives the heat of the air in the connection duct member, and radiates the heat to the outside.

JP 2009-133898 A

  However, the technique described in Patent Document 1 has a problem that the area occupied by the air-cooling unit in the projector is large, and the size of the projector increases. In addition, there is a problem that the arrangement position of other components included in the projector excluding the air cooling unit is greatly restricted.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 A projector according to this application example is a projector including a light source, a light modulation device, and a projection optical device, and includes a first fan having a suction port for sucking air and a delivery port for sending air. A first flow path for guiding the air sent out from the outlet to the light modulation device, a second flow path for circulating the air that has cooled the light modulation device, and air flowing through the second flow path A third flow path that leads to the suction port; and a heat sink that dissipates heat in the third flow path. The direction perpendicular to the direction of the optical axis of the projection optical apparatus is the first direction, and the optical axis is When the direction and the direction orthogonal to the first direction are the second direction, the first flow path is disposed on one side of the first direction with respect to the projection optical device, and the second flow path is Arranged on the other side in the first direction with respect to the projection optical apparatus. Is, the third flow path, characterized in that it is arranged on one side in the second direction with respect to the projection optical device.

  According to this configuration, the air sent from the first fan flows through the first flow path, the light modulation device, the second flow path, and the third flow path in this order, and is radiated by the heat sink and sucked into the first fan. An air circulation flow path is formed. The light modulator is cooled by the air flowing through the circulation channel. The first flow path, the second flow path, and the third flow path are provided around the projection optical apparatus. That is, the first flow path, the second flow path, and the third flow path are formed by effectively using a space that tends to be a dead space around the projection optical apparatus. Accordingly, it is possible to provide a small projector while efficiently cooling the light modulation device. In addition, it is possible to improve the degree of freedom of arrangement of other components included in the projector excluding the circulation flow path.

  Application Example 2 In the projector according to the application example, the heat sink is disposed in the third flow path, and a plurality of first fins extending along a flow direction of air in the third flow path; It is preferable to have a heat radiating portion that is connected to the plurality of first fins so as to be able to conduct heat and is exposed to the outside of the third flow path.

  According to this configuration, the heat in the third flow path is received by the plurality of first fins and radiated to the outside of the third flow path by the heat radiating unit. In addition, since the plurality of first fins extend along the direction in which the air flowing through the third flow path flows, it is possible to form a smooth air flow in the third flow path. Therefore, a heat sink that efficiently dissipates the heat in the third flow path to the outside of the third flow path is possible.

  Application Example 3 In the projector according to the application example described above, the projection optical device has a cylindrical outer surface with the optical axis as a central axis, and the plurality of first fins have tips aligned with the outer surface. In addition, it is preferably formed in an arc shape.

  According to this configuration, the plurality of first fins are formed in an arc shape so that the tips thereof are along the outer surface of the projection optical apparatus. As a result, the first fin can be formed close to the projection optical apparatus, and the first fin having a size that can sufficiently receive the heat in the third flow path can be formed. Therefore, it is possible to form a heat sink that suppresses the amount of projection with respect to the projection optical apparatus in the second direction and ensures heat dissipation.

  Application Example 4 In the projector according to the application example, the heat radiating unit includes a plurality of second fins extending in a direction intersecting with a direction in which the plurality of first fins extend. Is preferred.

According to this configuration, since the heat sink has the plurality of second fins connected to the plurality of first fins so as to conduct heat, the heat of the third flow path can be efficiently radiated to the outside. It becomes.
In addition, the first fin extends in the direction of air flow in the third flow path, that is, the direction approximate to the first direction, while the second fin extends in a direction intersecting the first direction. . Accordingly, a configuration in which air is circulated through the second fin so as to have sufficient heat dissipation while maintaining miniaturization in the first direction becomes possible.

  Application Example 5 In the projector according to the application example described above, the projector includes a second fan that sends air to the plurality of second fins, and the second fan includes the plurality of second fins in a direction in which the plurality of second fins extend. It is preferable that the second fins are juxtaposed.

  According to this configuration, since the projector includes the second fan described above, the second fan and the plurality of second fins can be arranged in a compact manner, and the air sent from the second fan can be used sufficiently. And heat dissipation of a plurality of 2nd fins can be promoted. Therefore, it is possible to provide a projector capable of cooling the light modulation device more efficiently while maintaining the miniaturization.

  Application Example 6 In the projector according to the application example described above, the light source includes a semiconductor laser, a wavelength conversion element that converts a wavelength of light emitted from the semiconductor laser is provided, and is distributed to the plurality of second fins. It is preferable to provide an air guide portion that guides air so as to cool the wavelength conversion element.

  According to this configuration, the wavelength conversion element is cooled using the air sent from the second fan and circulated through the plurality of second fins. Thus, the wavelength conversion element can be cooled without providing a fan for cooling the wavelength conversion element. Therefore, it is possible to provide a projector capable of cooling the light modulation device and other wavelength conversion elements while maintaining the miniaturization.

1 is an external perspective view of a projector according to an embodiment. It is the external appearance perspective view of the main-body part of this embodiment, and the figure seen from back diagonally. It is the disassembled perspective view which shows the inside of a main-body part, and the figure seen from diagonally forward. The schematic diagram which shows the main structures of the optical unit of this embodiment. FIG. 3 is a perspective view showing an optical unit of the present embodiment and a panel driving unit of the circuit device. The schematic diagram which shows the main structures of the illuminating device of this embodiment. The perspective view which shows the optical unit of the state which removed the illuminating device of this embodiment. The perspective view of the cooling device and heat sink of this embodiment. The perspective view of the 1st cooling system and light modulation apparatus of this embodiment. The perspective view of the 1st cooling system of this embodiment. The perspective view which looked at the optical unit of the state which removed the illuminating device of this embodiment, and the 1st cooling system from diagonally upward. The perspective view which shows the duct member, 1st housing | casing, and light modulation apparatus of this embodiment. The perspective view which looked at the optical unit of this embodiment, and the 1st cooling system from diagonally downward. Sectional drawing of the optical unit of the cross dichroic prism vicinity of this embodiment, and a 1st cooling system. The disassembled perspective view which shows the support body of the 2nd cooling system of this embodiment, a 2nd fin, a thermal radiation part, and a thermal radiation part vicinity. The perspective view which shows the 2nd cooling system of this embodiment, a 2nd fin, a thermal radiation part, and a support body. The perspective view of the 3rd cooling system of this embodiment, a heat sink, and a support body.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings shown below, the dimensions and ratios of the components are appropriately changed from the actual ones in order to make the components large enough to be recognized on the drawings.
The projector according to the present embodiment modulates light emitted from a light source according to image information, and enlarges and projects the modulated light.

[Main components of the projector]
FIG. 1 is an external perspective view of a projector 1 according to the present embodiment.
As shown in FIG. 1, the projector 1 rotatably supports a main body 1A for projecting an image, a power supply 1B for supplying power to the main body 1A, and the main body 1A, and the main body 1A and the power supply 1B. 1C is connected.

  The projector 1 projects an image in a desired direction by installing the power supply unit 1B on a ceiling or the like and rotating the main unit 1A. In the following, for convenience of explanation, the main body portion 1A is viewed from the front in a posture in which the image projection direction is the front (+ Y direction), the connection portion 1C side is upward (+ Z direction), and the connection portion 1C side is upward. The right side of the main body 1A is described as the right side (+ X direction). In addition, FIG. 1 is the figure which looked at the main-body part 1A from diagonally forward.

[Main configuration of main unit]
FIG. 2 is an external perspective view of the main body 1 </ b> A, as viewed from the rear obliquely. FIG. 3 is an exploded perspective view showing the inside of the main body 1 </ b> A, and is a view seen obliquely from the front.
As shown in FIGS. 1 to 3, the main body 1 </ b> A includes an exterior housing 2, an optical unit 3, a circuit device 4, a cooling device 5, and a frame (not shown).

The exterior housing 2 includes a case main body 21, a front frame 22, a front case unit 23, and a rear case 24.
As shown in FIGS. 1 and 2, the case main body 21 is formed in a cylindrical shape that extends in the Y direction and opens forward and backward.
On the upper surface of the case main body 21, a cylindrical convex portion 211 is provided at the center in the Y direction, and a round hole 212 is formed behind the convex portion 211.
The protrusion 211 is formed with an opening through which the shaft 20 attached to a frame (not shown) is exposed. As shown in FIG. 2, a spherical supported portion 20 </ b> S is provided at the tip of the shaft 20. In the main body 1A, the supported portion 20S is rotatably supported by the connecting portion 1C. A cable (not shown) from the power supply unit 1B is inserted into the round hole 212.

A frame (not shown) is disposed inside the case body 21 and supports the optical unit 3 and the like.
As shown in FIG. 3, the front frame 22 includes a front surface portion 22 f having a circular shape in plan view, and a protruding portion 22 p that protrudes rearward from the periphery of the front surface portion 22 f. The front frame 22 is attached to a frame (not shown) and is disposed on the front side in the cylindrical case body 21.
A projection opening 221 through which light emitted from a projection optical device 36 (to be described later) of the optical unit 3 passes, a first air inlet 222 having a plurality of holes, and a recess 223 are formed in the front surface portion 22f.

The projection opening 221 is formed near the lower end of the cylindrical case body 21 in the vertical direction.
The first air inlet 222 is provided above the projection opening 221 and to the left of the projection opening 221.
The concave portion 223 is provided on the right side of the projection opening 221 and in the vicinity of the protruding portion 22p, and has an inner wall along the vertical direction. A second intake port 224 having a plurality of holes is formed in the inner wall.

  The front case unit 23 includes an outer frame 231 and an inner frame (not shown), and is detachably attached to the front frame 22. The outer frame 231 has a projection opening 2311 through which light emitted from the projection optical device 36 passes, and an intake port having a plurality of holes communicating with the first intake port 222 and the second intake port 224 of the front frame 22. 2312 is formed. A projection opening through which light emitted from the projection optical device 36 passes and an intake port having a plurality of holes communicating with the first intake port 222 and the second intake port 224 are also formed in an inner frame (not shown). .

  The plurality of holes constituting the intake port 2312 of the outer frame 231 and the plurality of holes constituting the intake port of the inner frame are formed at positions shifted from the plurality of holes constituting the first intake port 222 when viewed from the front. ing. Thus, the main body 1A is configured such that the inside is difficult to visually recognize from the front, and external dust is difficult to enter the inside. The front case unit 23 is formed so that a dustproof filter can be disposed between the outer frame 231 and the inner frame. Accordingly, the projector 1 is configured to be able to further suppress the intrusion of dust into the main body 1A by mounting a dustproof filter.

The rear case 24 is formed in a circular shape in plan view, and a part of the rear case 24 is inserted into the rear side of the case body 21.
As shown in FIG. 2, the rear case 24 is formed with a plurality of openings 241 through which input terminals (not shown) provided in the circuit device 4 are exposed, and an exhaust port 242. The plurality of openings 241 are formed near the upper end of the cylindrical case body 21. The exhaust port 242 is formed near the left end of the case body 21 below the plurality of openings 241.

FIG. 4 is a schematic diagram showing the main configuration of the optical unit 3. FIG. 5 is a perspective view showing the optical unit 3 and a panel drive unit 41 to be described later of the circuit device 4 and is a view seen from obliquely below.
As shown in FIG. 4, the optical unit 3 includes an illumination device 30 that emits white light WL, a first mirror 3Ma, a second mirror 3Mb, an integrator optical system 31, a color separation light guide optical system 32, a light modulation device 34, As shown in FIG. 5, the cross dichroic prism 35, the projection optical device 36, and the head body 37, the optical component casing 38, and the support body 8 are provided.

FIG. 6 is a schematic diagram illustrating a main configuration of the illumination device 30.
As shown in FIG. 6, the illumination device 30 includes a light source 11, a heat sink 10H, a collimator optical system 12, an afocal optical system 13, a λ / 2 plate 19a, a homogenizer optical system 14, a polarization separation element 15, a reflection mirror 17, A λ / 4 plate 19b, pickup optical systems 16 and 18, a wavelength conversion device 70, and a storage member 75 (see FIG. 3) for storing these members are provided.

The light source 11 includes a substrate 111 and a plurality of semiconductor lasers 11a disposed on the substrate 111, and emits blue light B in the + X direction.
The heat sink 10H is disposed on the opposite side of the substrate 111 from the semiconductor laser 11a, and dissipates heat from the light source 11.
The heat sink 10H has a base portion 10Ha along the substrate 111 and a plurality of fins 10Hb protruding from the base portion 10Ha. As shown in FIG. 5, in the heat sink 10H, the base portion 10Ha is formed in a plate shape along the YZ plane, and the fins 10Hb are formed in a plate shape along the XY plane. The aforementioned exhaust port 242 (see FIG. 2) is provided behind the heat sink 10H.

Returning to FIG. 6, the collimator optical system 12 has a plurality of collimator lenses 12 a provided individually corresponding to the plurality of semiconductor lasers 11 a, and collimates the blue light B emitted from the light source 11. .
The afocal optical system 13 includes, for example, a convex lens 13a and a concave lens 13b, and reduces the diameter of the light beam of the blue light B that has passed through the collimator optical system 12.

The λ / 2 plate 19a is configured to be rotatable by a mechanism (not shown), and adjusts the ratio of the S polarization component and the P polarization component with respect to the polarization separation element 15.
The homogenizer optical system 14 includes, for example, lens arrays 14a and 14b, and uniformizes the light intensity distribution of the blue light B incident on a phosphor layer 71b (to be described later) of the wavelength conversion device 70.

The polarization separation element 15 reflects the blue light BLs of the S polarization component out of the blue light B transmitted through the homogenizer optical system 14 and transmits the blue light BLp of the P polarization component. Further, the polarization separation element 15 has a wavelength band different from that of the blue light B, and transmits fluorescence Y described later regardless of the polarization state.
The pickup optical system 16 has a function of condensing the blue light BLs reflected by the polarization separation element 15 onto the phosphor layer 71b and a function of picking up the fluorescence Y emitted from the phosphor layer 71b.

The reflection mirror 17 reflects the blue light BLp transmitted through the polarization separation element 15 toward the λ / 4 plate.
The λ / 4 plate converts incident blue light BLp into circularly polarized blue light BLc.
The pickup optical system 18 collects the blue light BLc converted by the λ / 4 plate toward a later-described diffusing unit 71c of the wavelength conversion device 70, and picks up the blue light BLc diffused by the diffusing unit 71c. It has a function.

The wavelength conversion device 70 includes a wavelength conversion element 71, a heat dissipation unit 72, and a rotation device 73 having a motor and the like.
The wavelength conversion element 71 includes a substrate 71a, a phosphor layer 71b formed on the substrate 71a, and a diffusion portion 71c, and is rotated by a rotation device 73. The phosphor layer 71b and the diffusion portion 71c are each formed in a ring shape around the rotation axis of the substrate 71a, and the phosphor layer 71b is disposed outside the diffusion portion 71c.

  The phosphor layer 71 b emits fluorescence Y (yellow light) including green light and red light by the blue light BLs collected by the pickup optical system 16. The fluorescence Y enters the polarization separation element 15 through the pickup optical system 16 and passes through the polarization separation element 15.

The diffusion unit 71c diffuses and reflects the blue light BLc collected by the pickup optical system 18 at the same diffusion angle as the fluorescence Y emitted from the phosphor layer 71b.
The blue light BLc diffusely reflected by the diffusing unit 71c enters the λ / 4 plate 19b through the pickup optical system 18 and is converted into S-polarized blue light BLs. The blue light BLs is reflected by the reflection mirror 17 and reflected by the polarization separation element 15.

  The blue light BLs reflected by the polarization separation element 15 is combined with the fluorescence Y transmitted through the polarization separation element 15. As described above, the illumination device 30 emits white light WL in which the fluorescence Y emitted from the phosphor layer 71b and the blue light BLs diffusely reflected by the diffusion unit 71c are combined. Moreover, the illuminating device 30 is arrange | positioned above the support body 8 as shown in FIG. 3, and inject | emits white light WL back (-Y direction).

The heat radiating unit 72 radiates heat from the wavelength conversion element 71.
As shown in FIG. 6, the heat radiating part 72 is provided on the opposite side of the phosphor layer 71b of the substrate 71a.
The heat dissipating part 72 has a rectangular base part 721 as viewed from above and a plurality of fins 722 protruding from the base part 721.
The plurality of fins 722 are formed near one end of the base 721 and extend in the vertical direction. Further, the plurality of fins 722 protrude from the storage member 75 as shown in FIG.

  As shown in FIG. 3, the storage member 75 has a lower housing 751 that forms the lower side (the support 8 side) and an upper housing 752 that forms the upper side.

  The first mirror 3Ma is disposed in the upper housing 752 and reflects the white light WL emitted from the illumination device 30 toward the rear in the downward direction (−Z direction). The second mirror 3Mb is disposed in the support 8 and reflects the white light WL reflected by the first mirror 3Ma forward (+ Y direction).

Returning to FIG. 4, the integrator optical system 31 includes lens arrays 311 and 312, a polarization conversion element 313, and a superimposing lens 314.
The lens array 311 has a configuration in which small lenses are arranged in a matrix, and divides the white light WL reflected by the second mirror 3Mb into a plurality of partial lights. The lens array 312 has substantially the same configuration as the lens array 311 and, together with the superimposing lens 314, partially superimposes the partial light on the light modulation device 34 described later. The polarization conversion element 313 has a function of aligning random light emitted from the lens array 312 with polarized light that can be used by the light modulation device 34.

  The color separation light guide optical system 32 includes dichroic mirrors 321 and 322, reflection mirrors 323 and 324 and 325, relay lenses 326 and 327, and a field lens 328. The color separation light guide optical system 32 separates the white light WL emitted from the integrator optical system 31 into red light LR, green light LG, and blue light LB, and guides each color light to the light modulator 34 for each color light.

The light modulation device 34 is provided for each color light. The light modulation device for red light LR is 34R, the light modulation device for green LG is 34G, and the light modulation device for blue light LB light is 34B.
The light modulator 34 includes a transmissive liquid crystal panel, an incident-side polarizing plate disposed on the light incident side of the liquid crystal panel, an emitting-side polarizing plate disposed on the light emitting side of the liquid crystal panel, and a flexible substrate 34F (see FIG. 5). ).

  The flexible substrate 34F has one end connected to the liquid crystal panel and the other end connected to the panel drive unit 41 of the circuit device 4 (see FIG. 5). The light modulation device 34 has a rectangular pixel region in which a plurality of unillustrated minute pixels are formed in a matrix, and modulates incident color light to form a display image of each color light in the pixel region. The light modulation devices 34R, 34G, and 34B are supported by the cross dichroic prism 35 by a support member (not shown). FIG. 4 shows the light modulation device 34 integrated, but the liquid crystal panel, the incident-side polarizing plate, and the emission-side polarizing plate are arranged apart from each other.

  The cross dichroic prism 35 has a substantially square shape in plan view in which four right angle prisms are bonded together, and two dielectric multilayer films are formed on the interface where the right angle prisms are bonded together. The cross dichroic prism 35 combines the respective color lights modulated by the respective light modulation devices 34R, 34G, and 34B.

The projection optical device 36 has a plurality of lenses (not shown) arranged along an optical axis 36Ax (see FIG. 3) extending in the Y direction, and enlarges and projects the light synthesized by the cross dichroic prism 35. To do.
The projection optical device 36 accommodates a plurality of lenses, and as shown in FIG. 5, a lens barrel 361 having a cylindrical outer surface with the optical axis 36Ax as a central axis, and a flange portion 362 provided at the −Y side end. And a zoom adjustment driving unit 363 and a focus adjustment driving unit 364 (see FIG. 7). The projection optical device 36 is configured to be able to perform focus adjustment and zoom adjustment by operating a remote control from the outside.

As shown in FIG. 5, the head body 37 includes a lens support 371 that supports the projection optical device 36 and a prism support 372 that supports the cross dichroic prism 35 (see FIG. 4).
In the projection optical device 36, the flange portion 362 is screwed to the lens support portion 371.
The prism support portion 372 protrudes from the lens support portion 371 in the −Y direction. The cross dichroic prism 35 is fixed to the upper side of the prism support portion 372 with an adhesive.

  As shown in FIG. 5, the optical component casing 38 is attached to the lower side (−Z side) of the support 8. The optical component casing 38 includes a first casing 381 that forms the upper side (the support 8 side) and a second casing 382 that forms the lower side. The first housing 381 has an opening on the lower side (−Z direction), and houses the integrator optical system 31 and the color separation light guide optical system 32. The second housing 382 covers the opening of the first housing 381.

FIG. 7 is a perspective view showing the optical unit 3 with the illumination device 30 removed, as viewed from above.
As shown in FIG. 7, the first housing 381 has an attachment portion 3811 to which the head body 37 (see FIG. 5) is attached, and an opening 3812 provided on the −Y side of the attachment portion 3811.
The attachment portion 3811 protrudes upward so that the lens support portion 371 of the head body 37 is attached. The opening 3812 is formed so that the light modulators 34R, 34G, 34B and the cross dichroic prism 35 are exposed when viewed from above.
The second housing 382 has a recess 3821 (see FIG. 5) corresponding to the opening 3812. In the light modulation devices 34R, 34G, and 34B, as shown in FIG. 5, each flexible substrate 34F is drawn out from the recess 3821.

  As described above, the support body 8 has the lighting device 30 attached to the upper side and the optical component casing 38 attached to the lower side. As shown in FIG. 7, the support 8 has an opening 81 through which the white light WL reflected by the first mirror 3Ma (see FIG. 4) passes and an opening 82 through which the opening 3812 of the first housing 381 is exposed. And a bridge portion 83 provided above the attachment portion 3811 and a plurality of bosses 84 to which a frame (not shown) is screwed.

Further, as shown in FIG. 7, the support 8 has a protrusion 85 formed on the + X side of the opening 82, and an air introduction part 86 formed on the + Y side of the protrusion 85.
The protruding portion 85 is formed in a box shape that protrudes upward and opens on the lower side. The protruding portion 85 is formed in a rectangular shape when viewed from above, and has a notch 851 in which the upper surface and the side surface on the −Y side are notched. The notch 851 is formed so that the plurality of fins 722 (see FIG. 3) of the wavelength conversion device 70 are disposed.
The air introduction part 86 is a part that introduces air sent from a second fan 52F (see FIG. 3) described later of the cooling device 5. The air introduction portion 86 is provided at the + Y side end portion of the support 8, has openings on the front side and the lower side, and communicates with the inside of the protruding portion 85.

The circuit device 4 includes a panel drive unit 41 (see FIG. 5) that outputs a drive signal to the light modulation device 34, a control unit, and a light source drive unit (not shown).
The panel drive unit 41 includes a circuit board and electronic components mounted on the circuit board, and is disposed below (−Z direction) the optical component housing 38 as shown in FIG. The panel drive unit 41 is connected to a flexible substrate 34F drawn out from the recess 3821 of the optical component casing 38, and outputs a drive signal to the light modulation device 34 based on an instruction from the control unit.

The control unit includes a circuit board and electronic components such as a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory) mounted on the circuit board. Control related to image projection is performed. The control unit also includes an input terminal (for example, a terminal conforming to the HDMI (registered trademark) standard, a video terminal, or the like) that can input an image signal from an external device (such as a computer or a video player). The control unit is disposed above the optical unit 3, and the input terminal is exposed from the opening 241 (see FIG. 2) of the rear case 24.
The light source drive unit outputs a drive signal to the light source 11 based on an instruction from the control unit.

  The cooling device 5 takes in external air from the air inlet 2312 (see FIG. 3) of the outer frame 231 and cools the inside of the main body 1A, and warms air from the exhaust port 242 (see FIG. 2) of the rear case 24. Let it drain.

[Configuration of cooling device]
Here, the cooling device 5 will be described in detail.
Returning to FIG. 3, the cooling device 5 includes a first cooling system 51 provided in the vicinity of the projection optical device 36, a second cooling system 52 provided on the right side (+ X direction) of the first cooling system 51, and A third cooling system 53 is provided on the left side (−X direction) of the first cooling system 51.

First, the first cooling system 51 will be described.
FIG. 8 is a perspective view of the cooling device 5 and the heat sink 10H, as viewed from the front right side. FIG. 9 is a perspective view of the first cooling system 51 and the light modulation device 34, as viewed from the front left side. FIG. 10 is a perspective view of the first cooling system 51, with a duct member 62 described later being removed.

As shown in FIGS. 9 and 10, the first cooling system 51 includes a first fan 51 </ b> F, a first duct unit 6, and a heat sink 512, and cools the light modulation device 34.
The first fan 51F is disposed in the first duct portion 6 above the projection optical device 36. The first fan 51F is a sirocco fan that has an intake port 51Fi for sucking air and a send-out port 51Fe for sending air, and sends air taken in from the direction along the rotation axis in the rotational tangential direction. As shown in FIG. 10, the first fan 51 </ b> F has the suction port 51 </ b> Fi facing the lower side (−Z side, the projection optical device 36 side), and the delivery port 51 </ b> Fe facing the rear side (−Y side). Has been placed.

  The first cooling system 51 cools the light modulation device 34 with the air sent from the first fan 51F, radiates the warmed air with the heat sink 512, and then sucks the first fan 51F into the light modulation device 34 again. Send out. That is, the first cooling system 51 is configured to cool the light modulation device 34 by circulating the air sent from the first fan 51F.

As shown in FIG. 9, the first duct portion 6 includes duct members 61, 62, 63, and 64, and forms a flow path 6 </ b> S that circulates air with the optical component casing 38.
The flow path 6S includes a first flow path 6Sa, a second flow path 6Sb, and a third flow path 6Sc through which air sent from the first fan 51F flows in order.
The first flow path 6Sa is a flow path that guides the air sent from the outlet 51Fe to the light modulation device 34. The second flow path 6Sb is a flow path for circulating the air that has cooled the light modulation device 34. And 3rd flow path 6Sc is a flow path which guides the air which distribute | circulated 2nd flow path 6Sb to the inlet 51Fi of the 1st fan 51F.

The duct members 61 and 62 form a part of the first flow path 6Sa and the third flow path 6Sc.
FIG. 11 is a perspective view of the optical unit 3 and the first cooling system 51 with the illumination device 30 removed as viewed obliquely from above. FIG. 11 is a diagram in which a first cooling system 51 is added to the optical unit 3 shown in FIG.

As shown in FIGS. 9 and 11, the duct member 61 has a box-shaped portion 61A located above the projection optical device 36 and a standing wall portion 61B (see FIG. 10) located on the right side of the projection optical device 36. doing.
As shown in FIGS. 9 and 10, the box-shaped portion 61A has an upper surface portion 61u and a side surface portion 61w that rises downward from the periphery of the upper surface portion 61u, and the lower side (projection optical device 36 side) is open. Yes. The box-shaped portion 61A includes a fan storage portion 611 that stores the first fan 51F, and a first flow path forming portion 612.

  As shown in FIGS. 10 and 11, the first flow path forming unit 612 is connected to the rear side of the fan storage unit 611 so as to communicate with the fan storage unit 611, and above the light modulation device 34 and the cross dichroic prism 35. It is extended. The side surface portion 61w of the first flow path forming portion 612 is formed so as to surround the light modulation devices 34R, 34G, and 34B when viewed from above. And the 1st flow-path formation part 612 covers the opening part 3812 (refer FIG. 7) of the 1st housing | casing 381, as shown in FIG.

As shown in FIG. 10, the standing wall portion 61 </ b> B is formed so as to follow the side portion 61 w on the + X side in the fan housing portion 611. As shown in FIG. 11, a rectangular opening 613 (see FIG. 10), a cable insertion hole 614, and a plurality of protrusions 615 are formed in the standing wall 61 </ b> B.
As shown in FIG. 10, the opening 613 is a hole through which a part of the heat sink 512 (a plurality of first fins 512 b described later) is inserted.
The cable insertion hole 614 is formed above the opening 613, and the cable (not shown) of the first fan 51F is inserted therethrough. The plurality of protrusions 615 are provided above the cable insertion hole 614 and are formed at intervals such that the cable inserted from the cable insertion hole 614 can be locked.

FIG. 12 is a perspective view showing the duct members 61 and 62, the first housing 381, and the light modulation device 34, as viewed from below.
The duct member 62 is fitted to the lower side of the duct member 61 as shown in FIG. The duct member 62 covers a part of the opening in the fan housing part 611 and forms a part of the third flow path 6Sc (referred to as an air circulation region 62Ar) with the standing wall part 61B of the duct member 61. As shown in FIG. 10, the air circulation region 62Ar is a region including the vicinity of the suction port 51Fi of the first fan 51F, and is a region where a plurality of first fins 512b are arranged.

  Specifically, as shown in FIG. 12, the duct member 62 has a curved surface portion 621 slightly separated from the projection optical device 36 (see FIG. 11) and front and rear end portions of the curved surface portion 621 toward the standing wall portion 61 </ b> B. It has a side surface portion 622 that extends. The curved surface portion 621 has an arcuate cross section so that the outer surface is along the outer surface of the projection optical device 36 (the outer surface of the lens barrel 361). An opening 623 h is formed at the lower end 623 of the duct member 62. The air circulation region 62Ar is a region surrounded by the curved surface portion 621, the front and rear side surface portions 622, and the standing wall portion 61B.

  As illustrated in FIG. 12, the attachment portion 3811 of the first housing 381 is disposed on the −Y side of the duct member 62. That is, a part of the opening of the first flow path forming part 612 is covered with the attachment part 3811. The attachment portion 3811 is separated from the upper surface portion 61u of the first flow path forming portion 612, and the air sent from the first fan 51F passes between the attachment portion 3811 and the upper surface portion 61u. And the 1st flow path formation part 612 will be in the state which the -Y side of the attaching part 3811 opened. An opening portion of the first flow path forming unit 612 is defined as an air outlet 612A. The air outlet 612A communicates with the opening 3812 (see FIG. 7) of the first housing 381.

The air sent from the first fan 51F is sent to the light modulation device 34 from the air outlet 612A. Further, as shown in FIG. 9, air flows from the opposite side of the flexible substrate 34 </ b> F to the light modulation device 34.
Between the duct member 61, the duct member 62, and the attachment part 3811, the flow path from the outlet 51Fe to the air outlet 612A becomes the first flow path 6Sa. The first flow path 6Sa is disposed on one side (upper side) of the projection optical apparatus in the first direction (vertical direction) orthogonal to the optical axis 36Ax of the projection optical apparatus 36. That is, in FIG. 9, the first flow path 6Sa is positioned on the plus side in the Z-axis direction with respect to the projection optical device 36.

FIG. 13 is a perspective view of the optical unit 3 and the first cooling system 51 as viewed obliquely from below. FIG. 13 is a view in which a first cooling system 51 is added to the optical unit 3 shown in FIG.
As shown in FIG. 13, the duct members 63 and 64 are arranged on the opposite side of the duct members 61 and 62 with the projection optical device 36 interposed therebetween.
The duct members 63 and 64 form part of the second flow path 6Sb and the third flow path 6Sc.

  As shown in FIG. 9, the duct member 63 is formed in a box shape whose upper side (projection optical device 36 side) is open, and extends from below the light modulation device 34 to the vicinity of the lower end portion 623 of the duct member 62. And the duct member 63 is formed so that the recessed part 3821 (refer FIG. 5) of the 2nd housing | casing 382 may be covered, as shown in FIG. Specifically, as illustrated in FIGS. 9 and 10, the duct member 63 includes a second flow path forming portion 631 extending forward from the lower side of the light modulation device 34, and a lower end portion from the second flow path forming portion 631. It has a bent portion 632 formed so as to gradually rise toward 623.

As shown in FIG. 9, the duct member 64 has a curved surface portion 641 slightly spaced from the projection optical device 36 (see FIG. 13), and an upper end portion 642 facing the lower end portion 623 of the duct member 62. The upper side of 63 is fitted. The curved surface portion 641 is formed in an arc shape in cross section following the curved surface portion 621 of the duct member 62. The upper end 642 is formed with an opening (not shown) that communicates with the opening 623 h of the lower end 623.
Further, the duct member 64 opens a portion (a part of the opening in the second flow path forming portion 631) facing the air outlet 612 </ b> A among the openings of the duct member 63 and covers the remaining openings. Is formed. An opening portion of the duct member 63 in a state where the duct member 64 is fitted is defined as an air inlet 63A. The air inflow port 63A communicates with the recess 3821 (see FIG. 5) of the second housing 382.

  The air that has cooled the light modulation device 34 flows in from the air inlet 63 </ b> A, and is surrounded by the second flow path forming portion 631 and the duct member 64, and is surrounded by the bent portion 632 and the duct member 64. In this order, and flows into the air circulation region 62Ar (see FIG. 10) from the opening of the upper end 642.

A region surrounded by the second flow path forming portion 631 and the duct member 64 is the second flow path 6Sb through which the air that has cooled the light modulation device 34 circulates. The second flow path 6Sb is disposed on the other side (lower side) of the projection optical apparatus in the first direction (vertical direction) orthogonal to the optical axis 36Ax of the projection optical apparatus 36. That is, the second flow path 6Sb is located in the minus Z direction with respect to the projection optical apparatus.
A region surrounded by the bent portion 632 and the duct member 64 forms a third flow path 6Sc with the air circulation region 62Ar. The third flow path 6Sc is arranged on one side (right side) of the projection optical device 36 in the second direction (left-right direction) orthogonal to the optical axis 36Ax and the first direction.

  As shown in FIGS. 10 and 11, the heat sink 512 includes a base portion 512a, a plurality of first fins 512b protruding from one side of the base portion 512a, and a plurality of second fins 512c protruding from the other side of the base portion 512a. have.

  As shown in FIG. 10, the heat sink 512 has a plurality of first fins 512 b inserted through the opening 613 and disposed in the air circulation region 62 Ar (third flow path 6 Sc), and the base 512 a is the opening of the duct member 61. 613 is arranged so as to cover 613. That is, the heat sink 512 has a plurality of first fins 512b arranged in the third flow path 6Sc, and a base portion 512a and a plurality of second fins 512c arranged outside the third flow path 6Sc (flow path 6S). Yes. The base portion 512a and the plurality of second fins 512c are connected to the plurality of first fins 512b so as to be able to conduct heat, and correspond to a heat radiating portion exposed to the outside of the third flow path 6Sc. In the heat sink 512, the plurality of first fins 512b receive the heat in the third flow path 6Sc, and the heat transmitted from the plurality of first fins 512b to the base part 512a and the second fin 512c is transferred to the third flow path 6Sc. Dissipate heat to the outside.

  The plurality of first fins 512b extend along the air flow direction by the first fan 51F, specifically, the air flow direction (Z direction) in the third flow path 6Sc. Further, each of the plurality of first fins 512b is formed in a plate shape along the XZ plane. The plurality of first fins 512b are formed slightly spaced from the inner surface of the curved surface portion 621 (see FIG. 9), and the tips thereof have an arc shape so as to follow the outer surface of the projection optical device 36 (the outer surface of the lens barrel 361). Is formed. In other words, the plurality of first fins 512b are formed such that the amount of protrusion from the base portion 512a gradually increases from the upstream side toward the downstream side in the air flow direction.

  The plurality of second fins 512c extends in a direction intersecting the direction in which the plurality of first fins 512b extends. Specifically, the plurality of second fins 512c extend in a direction orthogonal to the Z direction. Each of the plurality of second fins 512c is formed in a plate shape along the XY plane.

FIG. 14 is a cross-sectional view of the optical unit 3 and the first cooling system 51 in the vicinity of the cross dichroic prism 35.
As shown in FIGS. 9 and 14, the air sent from the first fan 51 </ b> F is guided by the first flow path 6 </ b> Sa to cool the light modulation device 34. The air heated by cooling the light modulation device 34 flows through the second flow path 6Sb and the third flow path 6Sc in sequence, and is radiated by the heat sink 512. Then, the air radiated by the heat sink 512 is sucked into the first fan 51F and blown to the light modulation device 34 again.

  As described above, the first cooling system 51 cools the light modulation device 34 by circulating the air sent from the first fan 51F. In the first flow path forming portion 612, as shown in FIG. 14, ribs 6121 that are spaced apart from the side surface portion 61w and corresponding to the light modulation device 34 are formed. Accordingly, air can be efficiently circulated on the surfaces of the liquid crystal panel, the incident-side polarizing plate, and the emission-side polarizing plate in the light modulation device 34, so that these members can be efficiently cooled.

Next, the second cooling system 52 will be described.
Returning to FIG. 8, the second cooling system 52 includes a second fan 52 </ b> F and a duct member 520, and is disposed on the right side of the duct member 61.
The second fan 52F is juxtaposed in front of the plurality of second fins 512c (see FIG. 11) in the heat sink 512, and sends air to the second fins 512c. That is, the second fan 52F is juxtaposed with the plurality of second fins 512c in the direction in which the plurality of second fins 512c extends.
The duct member 520 is formed to guide the air flowing through the second fins 512c to the fins 722 (see FIG. 3) of the heat radiating unit 72 in the wavelength conversion device 70 with the support 8 (see FIG. 3).

FIG. 15 is an exploded perspective view showing the second cooling system 52, the second fin 512c, the heat radiating portion 72, and the support body 8 in the vicinity of the heat radiating portion 72, and the second cooling system 52, the second fin 512c, and the heat radiating portion. 72 is a diagram in which 72 and the support 8 are separated.
The second fan 52F is a sirocco fan, and is arranged so that the suction port 52Fi faces the right side and the delivery port 52Fe faces the second fin 512c, as shown in FIGS. The aforementioned second intake port 224 (see FIG. 3) of the front frame 22 is formed corresponding to the intake port 52Fi. That is, the second fan 52F is configured to take in outside air from the second intake port 224 and send air to the cooling target.

The duct member 520 includes a storage portion 521 that stores the second fan 52F and the second fin 512c, and a protrusion 522 that protrudes from the −Y side of the storage portion 521.
As shown in FIG. 15, the storage portion 521 has an opening that exposes the suction port 52Fi, and as shown in FIG. 15, the storage portion 521 stands up from the side surface portion 521a and is inclined on the −Y side of the second fin 512c. It has a portion 521b and a notch 521c.
As shown in FIG. 15, the inclined portion 521b is inclined so that the distance away from the second fin 512c increases as it goes upward. The notch 521c is formed at the upper end of the inclined portion 521b.

  The protruding portion 522 extends from the upper end of the inclined portion 521b in the −Y direction, and the second extending from the −Y side end of the first extending portion 522a in the −X direction. The extending portion 522b is provided.

FIG. 16 is a perspective view showing the second cooling system 52, the second fin 512c, the heat radiating portion 72, and the support 8, and is a view showing the vicinity of the second extending portion 522b.
As shown in FIG. 16, in the duct member 520, the second extending portion 522b covers the lower opening of the projecting portion 85 in the support 8, and the periphery of the notch 521c and the first extending portion 522a is the support. 8 is formed so as to face the peripheral edge of the air introduction part 86 (see FIG. 15).

  The air sent from the second fan 52F cools the second fin 512c. As shown in FIG. 15, the air that has cooled the second fin 512 c is guided to the inside of the protruding portion 85 by the inclined portion 521 b and the protruding portion 522, and flows along the fin 722.

The duct member 520 and the air introduction part 86 and the protruding part 85 in the support body 8 correspond to an air guide part, and the air that has flowed through the second fin 512c is a cooling target that is different from the light modulation device 34 in the projector 1 ( Guided to fin 722) of wavelength converter 70.
As described above, the second cooling system 52 cools the second fin 512c and cools the member outside the flow path 6S by using the air flowing through the second fin 512c.

Next, the third cooling system 53 will be described.
FIG. 17 is a perspective view of the third cooling system 53, the heat sink 10 </ b> H, and the support 8.
As shown in FIG. 17, the third cooling system 53 includes a third fan 53 </ b> F and a second duct portion 9 and is supported by the support body 8. The third cooling system 53 takes in air outside the main body 1A from the air inlet 2312 (see FIG. 3), and cools the light source 11 by blowing the taken air to the heat sink 10H.

  The third fan 53F is a sirocco fan, and has suction ports 53Fi on both sides as shown in FIGS. The third fan 53F is disposed in front of the heat sink 10H, with one suction port 53Fi facing the fan housing portion 611 of the duct member 61, and a delivery port (not shown) facing the heat sink 10H. As described above, in the projector 1, the outlet of the third fan 53F, the heat sink 10H, and the exhaust port 242 of the rear case 24 are linearly arranged. The third fan 53F of the present embodiment uses a type in which the suction amount of the suction port 53Fi on the duct member 61 side (+ X side) is larger than the suction amount of the suction port 53Fi on the opposite side.

  The second duct portion 9 is configured by combining duct members 91 and 92 arranged to face each other in the left-right direction. The second duct portion 9 is configured to house the third fan 53F, introduce outside air by driving the third fan 53F, and guide the air sent from the third fan 53F to the heat sink 10H.

  The duct member 91 is formed so as to accommodate the −X side of the third fan 53F. Specifically, as shown in FIG. 17, the duct member 91 stands up in the + X direction from the side surface portion 91 s located on the −X side of the third fan 53 </ b> F, the front end portion and the upper and lower end portions of the side surface portion 91 s. It has a front surface portion 91f, an upper surface portion 91u, and a lower surface portion 91d. The duct member 91 is open on the rear side and extends to the vicinity of the + Y side end of the heat sink 10H. An opening 911 that exposes the −X side suction port 53Fi is formed in the side surface portion 91s.

  As shown in FIG. 8, the duct member 92 accommodates the + X side of the third fan 53F, and protrudes so that a part of the duct member 61 of the first cooling system 51 is inserted. It has a guide portion 92B that is connected to the rear side of the introduction port forming portion 92A and guides air with the duct member 91.

As shown in FIG. 8, the introduction port forming portion 92 </ b> A protrudes so that a part of the fan housing portion 611 (a part of the side surface portion 61 w and the upper surface portion 61 u) in the duct member 61 is inserted. The third fan 53 </ b> F is disposed in the second duct portion 9 so that the suction port 53 </ b> Fi faces the side surface portion 61 w of the fan storage portion 611.
The introduction port forming portion 92 </ b> A has a front surface portion 92 f that follows the front surface portion 91 f of the duct member 91. The front surface portion 92f is formed with an introduction port 921 that allows the inside of the second duct portion 9 to communicate with the first intake port 222 (see FIG. 3). The inlet 921 introduces air that flows into the first air inlet 222 into the second duct portion 9 when the third fan 53F is driven.

  The guide portion 92B faces the side surface portion 91s and is located on the −X side of the duct member 61, the side surface portion 92s (see FIG. 8), the upper surface portion 92u and the lower surface portion 91d of the duct member 91, respectively. 17), and has a lower surface portion (not shown). As with the duct member 91, the guide portion 92 </ b> B is open on the rear side and extends to the vicinity of the + Y side end of the heat sink 10 </ b> H.

When the third fan 53F is driven, the air introduced into the second duct part 9 from the introduction port 921 is sent to the heat sink 10H from between the duct member 91 and the guide part 92B. The air heated by circulating through the heat sink 10H is discharged to the outside of the main body 1A from the exhaust port 242 located behind the heat sink 10H. The temperature rise of the light source 11 is suppressed by the heat sink 10H dissipating heat.
In this manner, the third cooling system 53 takes in outside air and cools the light source 11.

As described above, according to the projector 1 according to the present embodiment, the following effects can be obtained.
(1) The projector 1 includes a first cooling system 51 that cools the light modulation device 34. The flow path 6S (the first flow path 6Sa, the second flow path 6Sb, and the third flow path 6Sc) of the first cooling system 51 effectively uses a space that tends to be a dead space around the projection optical device 36. Is formed. Accordingly, it is possible to provide the small projector 1 while efficiently cooling the light modulation device 34.

  (2) The heat in the third flow path 6Sc is received by the plurality of first fins 512b, and is radiated to the outside of the third flow path 6Sc by the second fins 512c. In addition, since the plurality of first fins 512b extend along the direction in which the air flowing through the third flow path 6Sc flows, it is possible to form a smooth air flow in the third flow path 6Sc. Therefore, the heat sink 512 that efficiently dissipates the heat in the third flow path 6Sc to the outside of the third flow path 6Sc is possible.

  (3) The plurality of first fins 512b are formed in an arc shape so that the tips thereof are along the outer surface of the projection optical device 36 (the outer surface of the lens barrel 361). As a result, the first fin 512b is formed close to the projection optical device 36, and the first fin 512b having a size capable of sufficiently receiving the heat in the third flow path 6Sc can be formed. Therefore, it is possible to form the heat sink 512 that suppresses the amount of protrusion from the projection optical device 36 and ensures heat dissipation.

(4) Since the heat sink 512 has the plurality of second fins 512c connected to the plurality of first fins 512b so as to be capable of conducting heat, the heat of the third flow path 6Sc can be efficiently radiated to the outside. It becomes possible.
The first fin 512b extends in the air flow direction (first direction, Z direction) in the third flow path 6Sc, whereas the second fin 512c extends in a direction orthogonal to the Z direction. Yes. As a result, it is possible to adopt a configuration in which air is circulated through the second fins 512c so as to have sufficient heat dissipation while maintaining miniaturization in the Z direction.

  (5) The projector 1 includes a second fan 52F that is arranged in parallel with the plurality of second fins 512c and sends air to the plurality of second fins 512c. This enables a compact arrangement of the second fan 52F and the plurality of second fins 512c, and promotes heat dissipation of the plurality of second fins 512c by fully utilizing the air sent out by the second fan 52F. Can do. Therefore, it is possible to provide the projector 1 that can cool the light modulation device 34 more efficiently while maintaining the miniaturization.

  (6) The projector 1 includes an air guide unit that guides the air flowing through the plurality of second fins 512 c to the fins 722 of the wavelength conversion device 70. Accordingly, the wavelength conversion device 70 can be cooled without providing a fan for cooling the wavelength conversion device 70. Therefore, it is possible to provide the projector 1 that can cool the light modulation device 34 and the wavelength conversion device 70 while maintaining the miniaturization.

  (7) In the projector 1, since the outlet of the third fan 53F, the heat sink 10H, and the exhaust port 242 of the rear case 24 are linearly arranged, smooth exhaust can be performed without providing a dedicated fan for exhaust. Become.

(Modification)
Note that the present invention is not limited to the above-described embodiment, and various modifications and improvements can be added to the above-described embodiment.
In the first cooling system 51 of the embodiment, the first fan 51F is disposed in the first duct portion 6, but the first flow path communicating with the delivery port 51Fe and the third flow path communicating with the suction port 51Fi. The duct part which has this may be comprised, and the structure by which the 1st fan 51F is arrange | positioned on the outer side of this duct part may be sufficient.

In the first cooling system 51 of the embodiment, the first fan 51F is configured by a sirocco fan, but may be configured by an axial fan.
Similarly, in the third cooling system 53 of the above embodiment, the third fan 53F is configured by a sirocco fan, but may be configured by an axial fan.
In the third cooling system 53 of the above embodiment, the third fan 53F has the suction ports 53Fi on both sides, but a fan having the suction port 53Fi only on the duct member 61 side may be used.

  A cushion member or the like may be disposed between the members constituting the flow path 6S so that the flow path 6S is sealed.

  The second fin 512c of the above embodiment extends in a direction orthogonal to the direction in which the first fin 512b extends. However, the second fin 512c extends not only in the orthogonal direction but also in an acute angle direction as long as it intersects. You may comprise.

  A configuration in which a heat pipe is arranged in the base portion 10Ha of the heat sink 10H is also possible.

  The illumination device 30 of the embodiment is configured by the light source 11 using a semiconductor laser, but a configuration using a light emitting diode or a discharge type light source is also possible.

  The light modulation device 34 is not limited to a transmissive liquid crystal panel, and a device using a reflective liquid crystal panel or a device using a micromirror device such as a DMD (Digital Micromirror Device) may be used. Is possible.

  The projector 1 according to the embodiment includes the connection portion 1C, and the main body portion 1A and the power supply portion 1B are configured separately, but does not include the connection portion 1C, and the main body portion 1A and the power supply portion 1B are integrated. The structure comprised by may be sufficient.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 6S ... Flow path, 6Sa ... 1st flow path, 6Sb ... 2nd flow path, 6Sc ... 3rd flow path, 11 ... Light source, 34 ... Light modulation apparatus, 36 ... Projection optical apparatus, 36Ax ... Optical axis , 51F ... first fan, 51Fe ... outlet, 51Fi ... suction port, 52F ... second fan, 70 ... wavelength conversion device, 71 ... wavelength conversion element, 72 ... heat dissipation part, 512 ... heat sink, 512a ... base part, 512b ... 1st fin, 512c ... 2nd fin, 520 ... Duct member (air guide part), 722 ... Fin.

Claims (6)

A projector comprising a light source, a light modulation device, and a projection optical device,
A first fan having a suction port for sucking air and a delivery port for sending air;
A first flow path for guiding air sent from the outlet to the light modulator;
A second flow path for circulating air that has cooled the light modulation device;
A third flow path for guiding the air flowing through the second flow path to the suction port;
A heat sink that dissipates heat in the third flow path;
With
When a direction orthogonal to the direction of the optical axis of the projection optical apparatus is a first direction, and a direction orthogonal to the direction of the optical axis and the first direction is a second direction,
The first flow path is disposed on one side in the first direction with respect to the projection optical apparatus,
The second flow path is disposed on the other side in the first direction with respect to the projection optical device,
The projector according to claim 1, wherein the third flow path is disposed on one side in the second direction with respect to the projection optical apparatus. The projector according to claim 1,
The heat sink is
A plurality of first fins disposed in the third flow path and extending along a flow direction of air in the third flow path;
A heat dissipating portion connected to the plurality of first fins so as to be capable of conducting heat and exposed to the outside of the third flow path;
The projector characterized by having. The projector according to claim 2,
The projection optical device has a cylindrical outer surface with the optical axis as a central axis,
The projector according to claim 1, wherein the plurality of first fins are formed in an arc shape so that tips thereof are along the outer surface. The projector according to claim 2 or 3, wherein
The projector has a plurality of second fins extending in a direction intersecting with a direction in which the plurality of first fins extend. The projector according to claim 4,
A second fan for sending air to the plurality of second fins;
The projector according to claim 1, wherein the second fan is juxtaposed with the plurality of second fins in a direction in which the plurality of second fins extend. The projector according to claim 5, wherein
The light source comprises a semiconductor laser;
A wavelength conversion element that converts the wavelength of light emitted by the semiconductor laser is provided,
A projector comprising: an air guide portion that guides air that has circulated through the plurality of second fins so as to cool the wavelength conversion element.

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