JP2007072058A - Projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector, having a cooling mechanism section, with reduced noise and that has an appropriate configuration. <P>SOLUTION: The projector 1 has an optical unit 4 and a housing for housing the optical unit 4. Furthermore, the projector 1 has an intake and exhaust device 70, constituting a cooling unit 7 cooling a member generating heat inside the body of the projector 1. The intake and exhaust device 70 has one intake port 200 which is formed in an outer case 2 and takes outside air into the body of the projector 1; a plurality of cooling fans (71, 72 and 73), which eject the outside air to the member generating the heat inside the body of the projector 1; and a plurality of ducts (74, 75 and 76) which introduce outside air, taken in from the intake port 200, to the cooling fans (71, 72 and 73). The plurality of ducts (74, 75 and 76) have an integral inlet port 700 introducing the outside air taken in from the intake port 200 in an area opposite to the intake port 200 and are connected to the respective cooling fans (71, 72 and 73), to be constituted integrally. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a projector.

  The projector has a structure in which a light beam emitted from a light source is modulated according to image information to form an optical image, and the optical image is enlarged and projected on a screen. In such a projector, since the members constituting the projector, including the light source, generate heat, it is necessary to cool the generated member in order to maintain the function of the projector. Therefore, the projector generally includes a cooling mechanism unit having a cooling fan, and cools a member that has generated heat. However, when the projector is cooled, noise is generated due to the operation (for example, rotation) of the cooling fan. Therefore, it is necessary to reduce the noise of the projector. Under such circumstances, regarding the noise reduction by the configuration of the cooling fan included in the cooling mechanism, in Patent Document 1, the noise of the rotating sound generated by the cooling fan leaks outside by covering the cooling fan with a sound insulating member. The thing of the structure which prevented this is proposed.

JP 2005-17458 A

  However, at the present time when projectors are beginning to be used in home theater applications at home, it is necessary to further reduce the noise of the projector, and not only a cooling fan but also a low-temperature structure including a cooling mechanism having a suction port, a duct, and the like. Noise reduction is an issue.

  The present invention has been made in view of the above problems, and an object thereof is to provide a projector having a cooling mechanism section having an appropriate configuration for reducing noise.

  The projector according to the present invention modulates a light beam emitted from a light source according to image information to form an optical image, and enlarges and projects the optical image on a screen, and a housing that houses the image projection device The projector has a cooling mechanism section that cools a member that generates heat, and the cooling mechanism section is formed in the housing and has one intake port for taking outside air into the projector body, The projector has a plurality of cooling fans that discharge outside air to a member that generates heat inside the projector body, and a plurality of ducts that introduce outside air taken in from the intake ports into the cooling fan, and the plurality of ducts are regions facing the intake ports And an integrated inlet for introducing outside air taken in from the inlet, and is connected to each cooling fan to be integrally formed.

  According to such a projector, the cooling mechanism unit includes one intake port, a plurality of cooling fans, and a plurality of ducts. The plurality of ducts have an integrated inlet in a region facing one intake port, and are integrally connected to the cooling fan. With this configuration, it is possible to introduce the introduced outside air into each duct through a single inlet, and the connected cooling fan discharges the outside air to the member that generates heat. . Also, in the configuration of the cooling mechanism unit, by using one intake port, the number of locations where the sound of rotation of each cooling fan connected to a plurality of ducts and the vibration noise associated with the rotation leaks to the outside of the projector. Therefore, it is possible to reduce noise compared to the case where multiple intake ports are installed. Therefore, it is possible to provide a projector having a cooling mechanism section having an appropriate configuration for reducing noise.

In the projector, the introduction port is preferably divided according to the number of ducts.
According to such a projector, by dividing according to the number of ducts, the outside air sucked from the intake port does not become a turbulent flow inside the integrated inlet port, and the respective ducts according to the number of ducts. Outside air can be reliably and efficiently introduced into the interior. As a result, the number of rotations of the cooling fans can be reduced, and the rotation noise of each cooling fan and the vibration noise associated with the rotation can be reduced, thereby further reducing noise. Therefore, it is possible to provide a projector having a cooling mechanism section with an appropriate configuration that further reduces noise.

In the projector, the introduction port is preferably divided from the vicinity of the intake port.
According to such a projector, since it is separated from the vicinity of the intake port, the turbulent flow of the outside air inside the introduction port is further suppressed, and the outside air can be efficiently introduced into each duct. As a result, the number of rotations of the cooling fan can be reduced, and noise can be further reduced. Therefore, it is possible to provide a projector having a cooling mechanism section with an appropriate configuration that further reduces noise.

  In the projector, the introduction port is preferably divided so as to have a predetermined area area.

  According to such a projector, the inlet is divided so as to have a predetermined area area set based on various conditions such as a cooling rate with respect to a member that generates heat and characteristics of a plurality of cooling fans to be used. Thereby, the quantity of the external air which flows through the inside of a duct can be set appropriately, and the member which heat | fever-generates can be cooled more efficiently. As a result, the number of rotations of the cooling fan can be reduced, and noise can be further reduced. Therefore, it is possible to provide a projector having a cooling mechanism section with an appropriate configuration that further reduces noise.

  In the projector, it is preferable that the air inlet is installed on the bottom side of the main body of the projector.

  According to such a projector, it is possible to further prevent the rotation sound of each cooling fan and the vibration sound accompanying the rotation from leaking to the outside of the projector, thereby further reducing noise. Therefore, it is possible to provide a projector having a cooling mechanism section with an appropriate configuration that further reduces noise.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment)

  FIG. 1 is a schematic perspective view of a projector according to an embodiment of the present invention as viewed from the upper front side. FIG. 2 is a schematic perspective view of the projector as viewed from the upper side of the back side upside down. FIG. 3 is a schematic perspective view of FIG. 2 with the air inlet cover member and the dustproof member removed. The external configuration of the projector 1 will be described with reference to FIGS.

  The projector 1 modulates a light beam emitted from a light source according to image information to form an optical image, and enlarges and projects the optical image on a screen. As shown in FIGS. 1 to 3, the projector 1 includes an exterior case 2 made of a synthetic resin, which is a substantially rectangular parallelepiped housing, and accommodates the apparatus main body of the projector 1. The projector 1 also includes a projection lens 3 as a projection optical device exposed from the exterior case 2. The projection lens 3 is configured as a combined lens in which a plurality of types of lenses are housed in a cylindrical lens barrel, and enlarges and projects an optical image modulated according to image information by the main body of the projector 1.

  Here, the front side 1a, the back side 1b, the right side 1c, the left side 1d, the top side 1e, and the bottom side 1f are defined with respect to the six surfaces of the projector 1. The exterior case 2 includes an upper case 21 that covers the upper part of the apparatus main body, a lower case 22 that covers the lower part of the apparatus main body, and a front case 23 that covers the front part of the apparatus main body.

  The upper case 21 constitutes a part of the upper surface side 1e, the right surface side 1c, the left surface side 1d, and the back surface side 1b of the outer case 2. As shown in FIG. 1, the upper surface side 1e has a substantially rectangular shape in plan view, and is gently curved from the substantially central portion in plan view to the front side 1a, the left and right sides (1d, 1c), and the back side 1b. It has a convex curved surface shape. Further, the right edge of the upper case 21 in the front side 1a direction is cut out in a curved shape. Further, as shown in FIG. 1, an operation panel 24 that performs a start-up / adjustment operation of the projector 1 is installed in a substantially central portion of the upper surface side 1 e so as to extend in the left-right direction. An operation button 241 on the operation panel 24 is appropriately pressed to operate.

  A projection lens position adjusting unit that adjusts the left and right positions and the vertical position of the projection lens 3 to the left and right positions around the projection lens 3 in the vicinity of the edge portion of the upper case 21 cut out in the above-described curved shape. Two dials 301 and 302 constituting 30 are exposed and installed. Then, by rotating one dial 301, the projection lens 3 can be moved up and down. Further, the projection lens 3 can be moved left and right by rotating the other dial 302.

  As shown in FIGS. 2 and 3, a concave portion 211 having a substantially rectangular shape in plan view is formed in the rear surface side 1 b of the upper case 21 in the right surface side 1 c direction, and a plurality of hole portions 212 are formed. Through the plurality of holes 212, a plurality of connection terminals 213 for inputting or outputting image signals, audio signals, and the like from an external electronic device are exposed to the outside. An interface board (not shown) for processing a signal input / output from the connection terminal 213 is installed inside the upper case 21 facing the recess 211. A remote control light receiving window 214 is installed in the left side 1d direction of the back side 1b. A remote control light receiving module (not shown) that receives an operation signal from the remote controller is installed inside the upper case 21 facing the remote control light receiving window 214.

  As shown in FIG. 1, the front case 23 engages with an opening formed in a state where the upper case 21 and the lower case 22 are connected, and constitutes a front side 1 a of the exterior case 2. The front case 23 extends in the left-right direction and has a curved shape. In the right side 1c direction of the front case 23, a recess is formed inside the exterior case 2, and a substantially circular opening 231 is formed at the center of the recess. The opening 231 exposes the tip portion of the projection lens 3. A remote control light receiving window 232 similar to the remote control light receiving window 214 described above is formed in the center portion of the front case 23. The remote control light receiving window 232 and the remote control light receiving window 214 are configured so that the projector 1 can be remotely operated from both the front and rear of the projector 1 using a remote controller (not shown). In addition, an exhaust port 233 for exhausting heat generated in the main body of the projector 1 from the inside of the exterior case 2 to the outside of the projector 1 is provided inside the exterior case 2 in the left side 1d direction of the front case 23. A depression and exhaust are formed having a substantially rectangular opening so that the exhaust is discharged in the direction of the front side 1a of the projector 1 and in the direction of the left side 1d. An exhaust duct having a louver is guided and fixed to the exhaust port portion 233 on the inner surface side of the opposed front case 23.

  As shown in FIGS. 2 and 3, the lower case 22 constitutes a part of the bottom side 1 f, the left and right side (1 d, 1 c), and the back side 1 b of the exterior case 2. The bottom surface side 1 f of the lower case 22 is configured by a substantially rectangular flat surface and forms the bottom surface of the exterior case 2. A fixed foot portion 221a that constitutes the foot portion 221 of the projector 1 is installed at a substantially central portion of the bottom surface side 1f in the rear surface side 1b direction. In addition, the left and right corner portions in the front side 1a direction of the bottom side 1f constitute a foot portion 221 together with two fixed feet 221a in total, and adjustable foot portions 221b and 221c that can move forward and backward in the bottom side 1f direction. Is installed. The adjustment feet 221b and 221c can adjust the vertical tilt position of the projector 1 when the projector 1 projects.

  Further, a substantially rectangular opening 100 for taking in outside air for cooling is installed inside the outer case 2 at a substantially central portion in the rear side 1b direction on the bottom side 1f. As shown in FIG. 2, the opening 100 is provided with an inlet cover member 101 so as to be detachable. The air inlet cover member 101 has a plurality of slit-shaped holes 102 formed in a lattice shape. A dust-proof member (not shown) is installed on the inner surface side of the intake port cover member 101. The dustproof member is provided with a nonwoven fabric having a function as an electrostatic filter processed into a pleat shape. The dustproof member functions to adsorb dust in order to prevent dust from the outside from being sucked into the projector 1 when the outside air is sucked. The dust-proof member may be any member that can prevent dust from being sucked into the interior.

  FIG. 3 shows a state in which the air inlet cover member 101 and the dustproof member are removed, and the opening 100 from which the air intake cover member 101 and the dustproof member are removed is divided by a predetermined area and is divided. An intake port 200 having a hole 103 that is further divided into a suitable area is formed integrally with the lower case 22. The opening 100 has a structure in which a dust-proof member is placed on the divided grid-like portion 104 and the air inlet cover member 101 is set thereon.

  On the left side of the opening 100, a light source cover member 222 having a substantially rectangular shape used when replacing the light source device is detachably installed. When replacing the light source device, the light source cover member 222 is removed, and the light source device housed in an optical unit (described later) disposed inside the exterior case 2 is removed and replaced.

  On the back side 1 b of the lower case 22, a recessed portion 223 that is recessed in a substantially rectangular shape in plan view is formed inside the outer case 2, similarly to the recessed portion 211, at a lower position of the recessed portion 211 formed in the upper case 21. , 225 are formed. The internal inlet connector 226 is exposed through the hole 224 so that external power can be supplied to the main body of the projector 1. Further, the push switch 227 is exposed through the hole 225 to control the start / stop of electric power.

FIG. 4 is a diagram showing the internal configuration of the projector. Specifically, it is a schematic perspective view showing a state in which the upper case 21 is removed from the state of FIG.
As shown in FIG. 4, the main body of the projector 1 is accommodated in the exterior case 2. Then, the optical unit 4 as an image projecting device on a substantially L-shape in a plan view extending in the left-right direction inside and having one end extending forward, and a control board (not shown) installed above the optical unit 4 And a power supply unit 5 installed from the back side 1b to the front side 1a along the inside of the left side 1d of the outer case 2. And it is installed along the inner side of the back side 1b of the exterior case 2 on the back side of the optical unit 4, sucks outside air and discharges it to the optical unit 4 and the power supply unit 5, and the optical unit 4 and the power supply unit 5 A cooling unit 7 is provided for exhausting the outside air to which heat has been transferred to the outside of the projector 1.

FIG. 5 is a diagram schematically showing an optical system of the optical unit. The structure of the optical unit 4 will be described with reference to FIG.
The optical unit 4 modulates the light beam emitted from the light source device according to image information to form an optical image, and forms a projected image on the screen via the projection lens 3. As shown in FIG. 5, the optical unit 4 includes an integrator illumination optical system 41, a color separation optical system 42, a relay optical system 43, an optical device 44 in which a light modulation device and a color synthesis optical device are integrated, These optical components 41, 42, 43, and 44 are functionally broadly classified into an optical component casing 45 that accommodates and fixes them.

  The integrator illumination optical system 41 is an optical system for making the luminous flux emitted from the light source uniform in the plane perpendicular to the illumination optical axis. The integrator illumination optical system 41 includes a light source device 411, a first lens array 412, a second lens array 413, a polarization conversion element 414, and a superimposing lens 415.

  The light source device 411 includes a light source lamp 411A as a radiation light source, a reflector 411B, and an explosion-proof glass 411C that covers a light beam emission surface of the reflector 411B. Then, the radial light beam emitted from the light source lamp 411A is reflected by the reflector 411B to become a substantially parallel light beam, and is emitted to the outside. In the present embodiment, a high-pressure mercury lamp is used as the light source lamp 411A, and a parabolic mirror is used as the reflector 411B. The light source lamp 411A is not limited to a high-pressure mercury lamp, and for example, a metal halide lamp or a halogen lamp may be employed. Moreover, although the parabolic mirror is employ | adopted as the reflector 411B, you may employ | adopt the structure which has arrange | positioned the collimating concave lens not only to this but to the output surface of the reflector which consists of an ellipsoidal mirror.

The first lens array 412 has a configuration in which small lenses having a substantially rectangular outline when viewed from the illumination optical axis direction are arranged in a matrix. Each small lens splits the light beam emitted from the light source lamp 411A into partial light beams and emits them in the direction of the illumination optical axis.
The second lens array 413 has substantially the same configuration as the first lens array 412 and has a configuration in which small lenses are arranged in a matrix. The second lens array 413 has a function of forming an image of each small lens of the first lens array 412 on a liquid crystal panel (to be described later) of the optical device 44 together with the superimposing lens 415.

  The polarization conversion element 414 converts the light from the second lens array 413 into approximately one type of polarized light, thereby improving the light use efficiency in the optical device 44. Specifically, each partial light beam converted into approximately one type of polarized light by the polarization conversion element 414 is finally substantially superimposed on a liquid crystal panel (described later) of the optical device 44 by the superimposing lens 415. In a projector using a liquid crystal panel of a type that modulates polarized light, only one type of polarized light can be used, and therefore approximately half of the light flux from the light source lamp 411A that emits randomly polarized light is not used. For this reason, by using the polarization conversion element 414, the light beam emitted from the light source lamp 411A is converted into substantially one type of polarized light, and the use efficiency of light in the optical device 44 is enhanced.

  The color separation optical system 42 includes two dichroic mirrors 421 and 422 and a reflection mirror 423. A plurality of partial light beams emitted from the integrator illumination optical system 41 are separated into three color lights of red (R), green (G), and blue (B) by two dichroic mirrors 421 and 422.

  The relay optical system 43 includes an incident side lens 431, a pair of relay lenses 433, and reflection mirrors 432 and 435. The relay optical system 43 has a function of guiding blue light, which is color light separated by the color separation optical system 42, to a blue light liquid crystal panel described later of the optical device 44.

  At this time, in the dichroic mirror 421 of the color separation optical system 42, among the light beams emitted from the integrator illumination optical system 41, the green light component and the blue light component are transmitted, and the red light component is reflected. The red light reflected by the dichroic mirror 421 is reflected by the reflection mirror 423, passes through the field lens 419, and reaches the liquid crystal panel for red light. The field lens 419 converts each partial light beam emitted from the second lens array 413 into a light beam parallel to the central axis (principal ray). The same applies to the field lens 419 provided on the light incident side of the liquid crystal panel for blue light and green light.

  Of the blue light and green light transmitted through the dichroic mirror 421, the green light is reflected by the dichroic mirror 422, passes through the field lens 419, and reaches the liquid crystal panel for green light. On the other hand, the blue light passes through the dichroic mirror 422, passes through the relay optical system 43, passes through the field lens 419, and reaches the liquid crystal panel for blue light. The reason why the relay optical system 43 is used for blue light is that the optical path length of the blue light is longer than the optical path lengths of the other color lights, thereby preventing a reduction in light use efficiency due to light divergence or the like. Because. That is, this is to transmit the partial light beam incident on the incident side lens 431 to the field lens 419 as it is. The relay optical system 43 is configured to pass blue light of the three color lights, but is not limited thereto, and may be configured to pass red light, for example.

  The optical device 44 modulates an incident light beam according to image information to form a color image. The optical device 44 includes three incident polarizing plates 442 (red light incident polarizing plate 442R for red light, green light incident polarizing plate 442G for green light, and the like. A blue light incident polarizing plate 442B). In addition, three liquid crystal panels 441 (red light liquid crystal panel 441R for red light, green light liquid crystal panel 441G for green light, and blue light for blue light as light modulation devices installed at the subsequent stage of each incident polarizing plate 442) A liquid crystal panel 441B). In addition, three emission polarizing plates 444 (red light emission polarizing plate 444R for red light, green light emission polarizing plate 444G for green light, and blue light emission polarizing plate for blue light are installed at the subsequent stage of each liquid crystal panel 441. 444B) and one cross dichroic prism 445.

  The liquid crystal panel 441 (441R, 441G, 441B) uses, for example, a polysilicon TFT (Thin Film Transistor) as a switching element, and the liquid crystal is hermetically sealed in a pair of opposed transparent substrates. The liquid crystal panel 441 modulates and emits a light beam incident through the incident polarizing plate 442 according to image information.

  The incident polarizing plate 442 transmits only polarized light in a certain direction out of each color light separated by the color separation optical system 42 and absorbs other light beams. A polarizing film is attached to a substrate such as sapphire glass. It is a thing. The exit polarizing plate 444 is configured in substantially the same manner as the entrance polarizing plate 442, and transmits only polarized light in a predetermined direction and absorbs other light beams out of the light beams emitted from the liquid crystal panel 441. The polarization axis of the polarized light to be transmitted is set to be orthogonal to the polarization axis of the polarized light to be transmitted through the incident polarizing plate 442.

The cross dichroic prism 445 forms a color image by synthesizing optical images emitted from the exit polarizing plate 444 and modulated for each color light. The cross dichroic prism 445 is provided with a dielectric multilayer film that reflects red light and a dielectric multilayer film that reflects blue light in a substantially X shape along the interface of four right-angle prisms. Three color lights are synthesized by the body multilayer film. The color light synthesized by the cross dichroic prism 445 is emitted in the direction of the projection lens 3. The image light emitted from the cross dichroic prism 445 is enlarged by the projection lens 3 and projected onto the screen.
The liquid crystal panel 441 (441R, 441G, 441B), the exit polarizing plate 444 (444R, 444G, 444B) and the cross dichroic prism 445 are unitized so as to be integrated.

  FIG. 6 is a perspective view showing the structure of the optical component casing, and is a perspective view of the optical component casing as viewed from the upper rear side. FIG. 7 is a perspective view showing the structure of the optical component casing, similar to FIG. 6, and is a perspective view of the optical component casing upside down as seen from above the bottom side. The structure of the optical component casing 45 will be described with reference to FIGS.

  The optical component housing 45 is a synthetic resin product by injection molding or the like, and closes the component housing member 46 in which the optical components 41, 42, 43, and 44 are accommodated, and the opening portion on the upper surface of the component housing member 46. And a lid-like lid-like member 47. The component accommodating member 46 includes a light source accommodating portion 48 that accommodates the light source device 411, and a component accommodating portion 49 that is formed in a container shape that accommodates other optical components 41, 42, 43, and 44 excluding the light source device 411. It has.

  As shown in FIG. 6, the light source accommodating portion 48 has a substantially box shape, and an opening for transmitting the light beam emitted from the light source device 411 is formed on the end surface on the component accommodating portion 49 side. Further, an opening 48C (shown in FIG. 7) for accommodating the light source device 411 so as to be inserted from the bottom surface side of the light source accommodating portion 48 is also formed on the bottom surface side (the lower side in the drawing) of the light source accommodating portion 48. . In addition, as shown in FIG. 6, the inflow opening 48 </ b> A and the outflow opening 48 </ b> A are provided on the rear side surface and the front side surface of the light source housing portion 48 in order to allow outside air to flow inside the light source housing portion 48. Each of the openings 48B has a substantially rectangular shape and is opposed to the opening 48B.

  The component housing portion 49 has a substantially rectangular parallelepiped shape with an upper surface opened, and one end thereof is connected to the light source housing portion 48. Although not specifically shown, the component housing portion 49 is formed with a plurality of grooves for slidingly fitting the optical components 412 to 415, 419, 421 to 423, 431 to 433 and 435 from above. Has been. A head portion 60 to which the projection lens 3 is screwed and fixed is attached to the other end of the component housing portion 49. The head unit 60 is for installing the projection lens 3 at a predetermined position with respect to the illumination optical axis set in the optical component casing 45. The projection lens position adjusting unit 30 is also installed in the head unit 60. An optical device 44 is installed in a part adjacent to the head part 60 of the component housing part 49.

  As shown in FIG. 7, an inflow opening 49 </ b> A that allows the outside air to flow inside at a position corresponding to the liquid crystal panel 441, the incident polarizing plate 442, and the exit polarizing plate 444 of the optical device 44 is provided on the bottom surface of the component housing portion 49. Is formed in a substantially T-shape. In addition, on the bottom surface of the component housing portion 49, an inflow opening portion 49B that similarly allows the outside air to flow inside is formed in a substantially rectangular shape at a position corresponding to the polarization conversion element 414. Through these inflow openings 49A, 49B, the corresponding optical elements (441, 442, 444, 414) described above flow and cool by the cooling unit 7 described later.

  As shown in FIGS. 6 and 7, the lid-like member 47 has an outflow opening through which the air that has flowed into the inflow opening 49 </ b> A and cooled the liquid crystal panel 441, the incident polarizing plate 442, and the exit polarizing plate 444 flows out. 47A is formed. Similarly, the lid-like member 47 is formed with an outflow opening 47B that flows into the inflow opening 49B and cools the polarization conversion element 414 to the outside above the polarization conversion element 414. Then, the lid-like member 47 substantially closes the upper opening portion in the component accommodating portion 49 of the component accommodating member 46 except for the outflow opening 47A and the outflow opening 47B described above.

Next, the configuration and operation of a control board that is not specifically illustrated will be briefly described.
The control board includes a main board disposed above the optical unit 4 and a sub board installed between the main board and the light source housing 48.

  The main board is configured as a circuit board on which an arithmetic processing device such as a CPU (Central Processing Unit) is mounted, and controls the entire projector 1. The main board drives and controls the liquid crystal panels 441R, 441G, and 441B based on signals output from the interface board. Each of the liquid crystal panels 441R, 441G, and 441B performs optical modulation to form an optical image. In addition, the main board receives operation signals output from the circuit board of the operation panel 24 and the remote control light receiving module (not shown), and appropriately issues control commands to the constituent members of the projector 1 based on the operation signals. Output.

  The sub board is a board on which a fan drive circuit for driving a plurality of cooling fans constituting the cooling unit 7 to be described later is mounted. The sub board is electrically connected to the main board and is output from the main board. Is input to drive the cooling fan. The main board and the sub board may be integrated.

Next, the configuration and operation of the power supply unit 5 will be briefly described.
The power supply unit 5 supplies power to the light source device 411, the control board, and the like. As shown in FIG. 4, the power supply unit 5 extends from the back side 1b to the front side along the inside of the left side 1d of the lower case 22 constituting the exterior case 2. Located over the side 1a. As shown in FIG. 4, the power supply unit 5 includes a power supply block 50 including a power supply circuit, and a lamp driving block 51 disposed between the power supply block 50 and the lower case 22.

  The power supply block 50 supplies electric power supplied from the outside through a power supply cable connected to the inlet connector 226 to the lamp drive block 51 that drives the light source device 411, the control board, and the like. The power supply block 50 includes a circuit board on which a transformer that converts input alternating current into low-voltage direct current, a conversion circuit that converts output from the transformer into a predetermined voltage, and the like are mounted on one side, and a cylinder that covers the circuit board. Shaped member 501. Among these, the cylindrical member 501 is made of aluminum and is formed in a substantially box shape with both ends opened.

  The lamp driving block 51 includes a circuit board on which one side of a conversion circuit for supplying power to the light source device 411 with a stable voltage is mounted. The commercial AC current input from the power supply block 50 It is rectified and converted by the block 51 and supplied to the light source device 411 as a direct current or an alternating rectangular wave current. The lamp driving block 51 includes a cylindrical member 511 that covers the circuit board, similarly to the cylindrical member 501 of the power supply block 50.

  FIG. 8 is a perspective view showing a state in which the cooling unit is installed in the lower case, as viewed from above the rear side. FIG. 9 is a perspective view showing a state in which the cooling unit is installed in the lower case, as seen from the upper front side, similarly to FIG. 8. FIG. 10 is a perspective view of the cooling unit as viewed from above the front side. FIG. 11 is a perspective view of the cooling unit as viewed from the front side upper side upside down. The configuration and operation of the cooling unit 7 will be described with reference to FIGS.

  As shown in FIGS. 8 and 9, the cooling unit 7 sucks outside air through the air inlet 200 (FIG. 3) formed on the bottom surface side 1 f of the lower case 22, and the optical unit 4 (FIG. 4) and the power supply unit. 5 (FIG. 4), and an exhaust device 80 that exhausts the outside air to which the heat of the optical unit 4 and the power supply unit 5 is transferred to the outside of the projector 1.

  The intake air discharge device 70 has three cooling fans, a first cooling fan 71, a second cooling fan 72, and a third cooling fan 73. In addition, three intake ducts including a first intake duct 74, a second intake duct 75, and a third intake duct 76 that allow the outside air drawn from the intake port 200 (FIG. 3) to flow into the cooling fans 71, 72, and 73, respectively. Have. Further, it has three discharge ducts of a first discharge duct 77, a second discharge duct 78, and a third discharge duct 79 that flow outside air discharged from the respective cooling fans 71, 72, 73. In this embodiment, a sirocco fan is used as each cooling fan 71, 72, 73. The sirocco fan has a structure that discharges outside air taken in from the direction of the rotation axis in the direction of centrifugal force due to rotation.

  The exhaust device 80 includes an exhaust fan 81 that sucks and discharges the outside air warmed by heat transferred from the optical unit 4 and the power supply unit 5, an exhaust duct 82 that flows the air discharged from the exhaust fan 81, and an exhaust It has an exhaust louver 83 for exhausting the air flowing through the duct 82 to the outside of the projector 1 in a predetermined direction. As the exhaust fan 81, an axial fan is used in the present embodiment. The axial fan has a structure that discharges air taken in from the rotation axis direction in the same direction. The cooling unit 7 (the intake / discharge device 70, the exhaust device 80), the intake port 200, and the like described above constitute a cooling mechanism.

  The configuration and operation of the intake / discharge device 70 of the cooling unit 7 will be described in detail with reference to FIGS. 10 and 11. The description will be made mainly using FIG.

  As shown in FIG. 11, the intake / discharge device 70 has a lower case in which the intake port 200 is formed in a planar position and a planar shape opposite to the intake port 200 (indicated by a two-dot chain line in FIG. 11) formed in the lower case 22. An inlet 700 (shown by hatching in FIG. 11) is formed in contact with the bottom surface 228 (FIG. 8). The introduction port 700 is a part of the port that introduces and flows the outside air sucked from the intake port 200 into the first intake duct 74, the second intake duct 75, and the third intake duct 76, and the three intake ducts 74 and 75. , 76 are integrally formed adjacent to each other.

  The introduction port 700 has three cooling fans 71 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, The area is divided into three parts with a predetermined area area obtained by taking into account the characteristics of 73 and the like. Specifically, the inlet 700 has three area areas 700 </ b> A corresponding to the first intake duct 74, an area area 700 </ b> B corresponding to the second intake duct 75, and an area area 700 </ b> C corresponding to the third intake duct 76. Divided into area areas. As a result, the inlet 700 is divided from the vicinity of the inlet 200 into predetermined area areas (area areas 700A, 700B, 700C) according to the number (three) of the intake ducts (74, 75, 76). Will be.

  The first intake duct 74 divided by the inlet 700 and having a region area 700 </ b> A accommodates the first cooling fan 71 in an opening 74 </ b> A formed in the first intake duct 74. By housing the first cooling fan 71, an air inlet (not shown) is secured near the rotation axis of the first cooling fan 71. The first intake duct 74 is connected to a first discharge duct 77 that flows outside air discharged from the discharge port 71 </ b> A of the first cooling fan 71.

  The first discharge duct 77 is branched into four ducts from the vicinity of the discharge port 71 </ b> A of the first cooling fan 71. Specifically, the first discharge duct 77 is branched into four ducts: an R discharge duct 771, a G discharge duct 772, a B discharge duct 773, and a polarization conversion element discharge duct 774. The R discharge duct 771, the G discharge duct 772, and the B discharge duct 773 are arranged near the inflow opening 49A (FIG. 7) formed on the bottom surface side of the component housing member 46 (FIG. 7). Established. The outside air discharged from the discharge port 71A of the first cooling fan 71 is bent in a substantially vertical direction and discharged to the inflow opening 49A.

  The R discharge duct 771 discharges outside air from the discharge port 771A of the R discharge duct 771, and is housed inside the component housing portion 49 relative to the inflow opening 49A as shown in FIG. The configuration is such that outside air flows from the bottom to the top with respect to the red light liquid crystal panel 441R, the red light incident polarizing plate 442R, and the red light emitting polarizing plate 444R as the optical device 44.

  Similarly, the G discharge duct 772 discharges outside air from the discharge port 772A of the G discharge duct 772, and is housed inside the component housing portion 49 relative to the inflow opening 49A as shown in FIG. With respect to the green light liquid crystal panel 441G, the green light incident polarizing plate 442G, and the green light emitting polarizing plate 444G as the optical device 44, the outside air flows from below to above.

  Similarly, the B discharge duct 773 discharges outside air from the discharge port 773A of the B discharge duct 773, and is housed inside the component housing portion 49 relative to the inflow opening 49A as shown in FIG. With respect to the blue light liquid crystal panel 441B, the blue light incident polarizing plate 442B, and the blue light emitting polarizing plate 444B as the optical device 44, the outside air flows from the bottom upward.

  The discharge duct 774 for the polarization conversion element is arranged with the discharge port 774A of the discharge duct 774 for the polarization conversion element in contact with the inflow opening 49B (FIG. 7) formed on the bottom surface side of the component housing member 46 (FIG. 7). Established. The outside air discharged from the discharge port 71A of the first cooling fan 71 is bent in a substantially vertical direction and discharged to the inflow opening 49B. Then, the polarization conversion element discharge duct 774 discharges outside air from the discharge port 774A, and as shown in FIG. 7, the optical device 44 is housed inside the component housing portion 49 relative to the inflow opening 49B. The outside air flows from the bottom to the top with respect to the polarization conversion element 414.

  The first discharge duct 77 is formed so that the bottom surface direction is opened. When the opened portion is accommodated in the lower case 22, a rib-shaped receiving portion 229 (FIG. 8) is formed on the bottom surface 228 (FIGS. 8 and 9) of the lower case 22 so as to correspond to the shape of the opened portion. , FIG. 9) is closed by contacting and functions as a duct.

  The second intake duct 75 that is divided at the inlet 700 and has a region area 700 </ b> B accommodates the second cooling fan 72 in an opening 75 </ b> A formed in the second intake duct 75. By accommodating the second cooling fan 72, an inlet (not shown) in the vicinity of the rotation axis of the second cooling fan 72 is secured. The second intake duct 75 is connected to a second discharge duct 78 that flows outside air discharged from the discharge port 72 </ b> A of the second cooling fan 72. The second discharge duct 78 causes the outside air to flow in the same direction as the discharge direction of the outside air discharged from the discharge port 72A of the second cooling fan 72. The second discharge duct 78 has an inflow opening 48A (see FIG. 6) formed on the side surface of the light source container 48 (FIG. 6) of the component housing member 46 (FIG. 6) at the discharge port 78A of the second discharge duct 78. 6), the outside air is caused to flow into the light source accommodating portion 48. Note that portions other than the region of the inlet 700 of the second air intake duct 75 are formed with the bottom surface opened. This opened portion is closed by abutting against a rib-shaped receiving portion (not shown) formed in the same manner as the above-described rib-shaped receiving portion 229 (FIGS. 8 and 9), and functions as a duct.

  The third intake duct 76 divided by the introduction port 700 and having a region area 700 </ b> C accommodates the third cooling fan 73 in an opening 76 </ b> A formed in the third intake duct 76. By accommodating the third cooling fan 73, an inlet (not shown) in the vicinity of the rotation axis of the third cooling fan 73 is secured. The third intake duct 76 is connected to a third discharge duct 79 that flows outside air discharged from the discharge port 73 </ b> A of the third cooling fan 73.

  The third discharge duct 79 is branched into two ducts from the vicinity of the discharge port 73A of the third cooling fan 73. More specifically, the third discharge duct 79 is branched into two ducts, a power supply discharge duct 791 and a lamp driving discharge duct 792. The power supply discharge duct 791 is disposed to face the opening 502 (FIG. 4) of the power supply block 50 (FIG. 4) constituting the power supply unit 5 (FIG. 4), and is outside air discharged from the discharge port 791A. As a result, the outside air flows inside the power supply block 50. The discharge duct 792 for driving the lamp is disposed to face the opening 512 (FIG. 4) of the lamp drive block 51 (FIG. 4) constituting the power supply unit 5 (FIG. 4), and discharged from the discharge port 792A. The outside air flows inside the power supply block 50 by the outside air.

  The third discharge duct 79 is formed with the bottom surface direction opened. When the opened portion is accommodated in the lower case 22, a rib-shaped receiving portion 229 (FIG. 8, FIG. 8) is formed corresponding to the shape of the opened portion on the bottom surface 228 (FIG. 8, FIG. 9) of the lower case 22. It is closed by abutting on FIG. 9) and functions as a duct.

  In the intake air discharge device 70 constituting the cooling unit 7 as the cooling mechanism unit of the present embodiment, the plurality of ducts (the first intake duct 74, the second intake duct 75, and the third intake duct 76) are integrated inlets. 700 and connected to each cooling fan (the first cooling fan 71, the second cooling fan 72, and the third cooling fan 73) to be integrally formed. Further, the first discharge duct 77, the second discharge duct 78, and the third discharge duct 79 are also integrally connected to the first intake duct 74, the second intake duct 75, and the third intake duct 76, respectively.

  An arrow A, an arrow B, and an arrow C shown in FIG. 11 schematically show paths through which the outside air flows inside the intake / discharge device 70. The manner of flow of the outside air inside the intake / discharge device 70 will be described with reference to FIG.

  The arrow A indicates that the outside air is introduced into the first intake duct 74 from the inlet 700 occupying the area area 700 </ b> A when the first cooling fan 71 is driven (rotated). The introduced outside air flows through the inside of the first intake duct 74 and is sucked into the first cooling fan 71, and the sucked outside air is discharged from the discharge port 71A of the first cooling fan 71. The discharged outside air flows inside the first discharge duct 77. Further, the first discharge duct 77 is branched into four, and one flows through the inside of the R discharge duct 771 and the outside air is discharged from the discharge port 771A. Further, one circulates inside the G discharge duct 772 and the outside air is discharged from the discharge port 772A. In addition, one circulates inside the B discharge duct 773, and the outside air is discharged from the discharge port 773A. One of them circulates inside the discharge duct 774 for the polarization conversion element, and outside air is discharged from the discharge port 774A.

  The arrow B indicates that the outside air is introduced into the second intake duct 75 from the introduction port 700 occupying the area area 700B when the second cooling fan 72 is driven (rotated). The introduced outside air flows through the inside of the second intake duct 75 and is sucked into the second cooling fan 72, and the sucked outside air is discharged from the discharge port 72A of the second cooling fan 72. The discharged outside air flows through the second discharge duct 78 and is discharged from the discharge port 78A.

  As indicated by an arrow C, the third cooling fan 73 is driven (rotated), so that outside air is introduced into the third intake duct 76 from the inlet 700 occupying the area 700C. The introduced outside air flows through the inside of the third intake duct 76 and is sucked into the third cooling fan 73, and the sucked outside air is discharged from the discharge port 73A of the third cooling fan 73. The discharged outside air flows inside the third discharge duct 79. Further, the third discharge duct 79 is branched into two, and one flows through the inside of the power supply discharge duct 791 and the outside air is discharged from the discharge port 791A. One is circulated in the discharge duct 792 for driving the lamp, and outside air is discharged from the discharge port 792A.

  Next, the cooling operation for the optical device 44, the light source device 411, the polarization conversion element 414, and the power supply unit 5 that generate heat inside the projector 1 by the cooling unit 7 will be described with reference to FIG. 11 and FIG. 4 as appropriate. To do.

Outside air flows in the intake / discharge device 70 as indicated by the arrows A, B, and C described above.
The first intake duct 74, the first cooling fan 71, and the first discharge duct 77 constituting the intake / discharge device 70 are for cooling the optical device 44 and the polarization conversion element 414. As shown in FIG. 7, the R discharge duct 771 of the first discharge duct 77 is an optical device 44 accommodated inside the component accommodating portion 49 relative to the inflow opening 49 </ b> A of the component accommodating member 46. The outside air flows from the bottom to the top with respect to the red light liquid crystal panel 441R, the red light incident polarizing plate 442R, and the red light emitting polarizing plate 444R. The heat generated by the red light liquid crystal panel 441R, the red light incident polarizing plate 442R, and the red light emitting polarizing plate 444R is transferred to the flowing outside air. The heated and heated outside air is optically transmitted through the outflow opening 47A (FIGS. 4 and 6) located above the red light liquid crystal panel 441R, the red light incident polarizing plate 442R, and the red light emitting polarizing plate 444R. It flows out above the unit 4 (indicated by arrow A1 in FIG. 4). The warm outside air that has flowed out is sucked into the exhaust fan 81 of the exhaust device 80, flows inside the exhaust duct 82, and is exhausted to the outside of the projector 1 in a predetermined direction by the exhaust louver 83 (arrow in FIG. 4). D). Through such a flow cycle, the red light liquid crystal panel 441R, the red light incident polarizing plate 442R, and the red light emitting polarizing plate 444R that generate heat are cooled.

  Similarly, the G discharge duct 772 of the first discharge duct 77 is accommodated inside the component accommodating portion 49 relative to the inflow opening 49A of the component accommodating member 46, as shown in FIG. The outside air flows from the bottom to the top with respect to the green light liquid crystal panel 441G, the green light incident polarizing plate 442G, and the green light emitting polarizing plate 444G. The heat generated by the green light liquid crystal panel 441G, the green light incident polarizing plate 442G, and the green light emitting polarizing plate 444G is transferred to the flowing outside air. The heated and heated outside air is optically transmitted through an outflow opening 47A (FIGS. 4 and 6) located above the green light liquid crystal panel 441G, the green light incident polarizing plate 442G, and the green light emitting polarizing plate 444G. It flows out above the unit 4 (indicated by arrow A2 in FIG. 4). The outflowed warm air is similarly exhausted to the outside of the projector 1 by the exhaust device 80 (indicated by an arrow D in FIG. 4). By such a flow cycle, the green light liquid crystal panel 441G, the green light incident polarizing plate 442G, and the green light emitting polarizing plate 444G that generate heat are cooled.

  Similarly, the B discharge duct 773 of the first discharge duct 77 is optically accommodated inside the component accommodating portion 49 relative to the inflow opening 49A of the component accommodating member 46, as shown in FIG. The outside air flows from below to above with respect to the blue light liquid crystal panel 441B, the blue light incident polarizing plate 442B, and the blue light emitting polarizing plate 444B. The heat generated by the blue light liquid crystal panel 441B, the blue light incident polarizing plate 442B, and the blue light emitting polarizing plate 444B is transferred to the flowing outside air. The outside air that has been heated and warmed is optically transmitted through an outflow opening 47A (FIGS. 4 and 6) located above the blue light liquid crystal panel 441B, the blue light incident polarizing plate 442B, and the blue light emitting polarizing plate 444B. It flows out above the unit 4 (indicated by an arrow A3 in FIG. 4). The outflowed warm air is similarly exhausted to the outside of the projector 1 by the exhaust device 80 (indicated by an arrow D in FIG. 4). By such a flow cycle, the blue light liquid crystal panel 441B, the blue light incident polarizing plate 442B, and the blue light emitting polarizing plate 444B that generate heat are cooled.

  As shown in FIG. 7, the polarization conversion element discharge duct 774 of the first discharge duct 77 is accommodated inside the component accommodating portion 49 relative to the inflow opening 49B of the component accommodating member 46. The outside air flows from bottom to top. Then, the heat generated in the polarization conversion element 414 is transferred to the flowing outside air. Heated and heated outside air flows out above the optical unit 4 through the outflow opening 47B (FIGS. 4 and 6) located above the polarization conversion element 414 (indicated by an arrow A4 in FIG. 4). . The outflowed warm air is similarly exhausted to the outside of the projector 1 by the exhaust device 80 (indicated by an arrow D in FIG. 4). The polarization conversion element 414 that generates heat is cooled by such a flow cycle.

  The second intake duct 75, the second cooling fan 72, and the second discharge duct 78 constituting the intake / discharge device 70 are for cooling the light source device 411. Specifically, as shown in FIG. 6, the second discharge duct 78 contacts the inflow opening 48 </ b> A formed on the side surface of the light source storage portion 48 of the component storage member 46 and is stored inside the light source storage portion 48. The outside air flows in the lateral direction with respect to the light source device 411. The heat generated by the light source device 411 is transferred to the flowing outside air. Heated and heated outside air flows out to the side of the optical unit 4 through the outflow opening 48B (FIG. 6) formed on the opposite side of the inflow opening 48A (indicated by an arrow B1 in FIG. 4). . The warmed outside air that has flowed out is exhausted to the outside of the projector 1 by the exhaust device 80 (indicated by an arrow D in FIG. 4). The light source device 411 that generates heat is cooled by such a flow cycle.

  The third intake duct 76, the third cooling fan 73, and the third discharge duct 79 constituting the intake / discharge device 70 are for cooling the power supply unit 5. Specifically, the power supply discharge duct 791 branched from the third discharge duct 79 cools the power supply block 50 constituting the power supply unit 5 (FIG. 4), and the branched lamp drive discharge duct 792 is connected to the power supply unit 5 ( The lamp driving block 51 constituting FIG. 4) is cooled.

  Regarding the cooling operation, the discharge duct 791 for power supply is disposed to face the opening 502 (FIG. 4) of the power supply block 50 (FIG. 4) and allows outside air to flow inside the power supply block 50. Heat generated in the power supply block 50 is transferred to the outside air. The outside air that has been heated and warmed flows out to the side of the power supply block 50 through an opening (not shown) formed in the side surface of the power supply block 50 near the exhaust device 80 (indicated by an arrow C1 in FIG. 4). . The warmed outside air that has flowed out is exhausted to the outside of the projector 1 by the exhaust device 80 (indicated by an arrow D in FIG. 4). Due to such a flow cycle, the power supply block 50 that generates heat is cooled.

  The lamp driving discharge duct 792 is disposed to face the opening 512 (FIG. 4) of the lamp driving block 51 (FIG. 4), and allows outside air to flow inside the lamp driving block 51. The heat generated in the lamp drive block 51 is transferred to the flowing outside air. The outside air that has been transferred and warmed passes through the side surface of the power supply block 50 so as to connect the exhaust device 80 from the facing portion of the opening portion 512 (FIG. 4). It flows out to the side (indicated by arrow C2 in FIG. 4). The warmed outside air that has flowed out is exhausted to the outside of the projector 1 by the exhaust device 80 (indicated by an arrow D in FIG. 4). The lamp driving block 51 that generates heat is cooled by such a flow cycle.

  The optical device 44, the light source device 411, the polarization conversion element 414, and the power supply unit 5 are cooled by the above-described flow cycle.

According to the embodiment described above, the following effects can be obtained.
(1) According to the projector 1 of the present embodiment, the cooling mechanism unit includes one intake port 200, a plurality of cooling fans (first cooling fan 71, second cooling fan 72, third cooling fan 73), and a plurality of cooling fans. It has a duct (a first intake duct 74, a second intake duct 75, a third intake duct 76). The plurality of ducts (the first air intake duct 74, the second air intake duct 75, and the third air intake duct 76) have an integrated inlet 700 in a region facing the one air inlet 200, and each cooling fan (71 , 72, 73) and are integrated. With this configuration, the outside air can be introduced into the integrated introduction port 700 through one intake port 200, and the introduced outside air can be introduced into each intake duct (74, 75, 76). The cooling fans (71, 72, 73) discharge outside air to the member that generates heat. Specifically, the first cooling fan 71 discharges outside air to the optical device 44 (the liquid crystal panel 441, the incident polarizing plate 442, and the exit polarizing plate 444) and the polarization conversion element 414. The second cooling fan 72 discharges outside air to the light source device 411. The third cooling fan 73 discharges outside air to the power supply unit 5 (the power supply block 50 and the lamp drive block 51). Further, in the configuration of the cooling mechanism section, by using one intake port 200, each cooling fan (the first intake duct 74) connected to a plurality of ducts (the first intake duct 74, the second intake duct 75, the third intake duct 76). Since the rotation sound of the cooling fan 71, the second cooling fan 72, and the third cooling fan 73) and the vibration sound accompanying the rotation can leak to the outside of the projector 1, the intake port 200 can be provided at multiple locations. Noise can be reduced compared to the case of installation. Therefore, it is possible to provide the projector 1 having the cooling mechanism unit having an appropriate configuration for reducing noise. Further, since the outside air can be introduced to all the fans, the cooling efficiency can be improved without increasing the size of the apparatus. In addition, since there is only one intake port, only one dustproof member is provided in the intake port, and there is an effect that maintenance is facilitated.

  (2) According to the projector 1 of the present embodiment, the inlet 700 is divided according to the three intake ducts of the first intake duct 74, the second intake duct 75, and the third intake duct 76. Thus, the outside air sucked from the inlet 200 is not turbulent inside the integrated inlet 700, and the outside air can be reliably and efficiently introduced into each intake duct (74, 75, 76). it can. Thereby, it becomes possible to reduce the rotation speed of each cooling fan (the 1st cooling fan 71, the 2nd cooling fan 72, the 3rd cooling fan 73), and the rotation sound and rotation of each cooling fan (71, 72, 73). Therefore, the noise can be further reduced. Therefore, it is possible to provide the projector 1 having a cooling mechanism section having an appropriate configuration for further reducing noise.

  (3) According to the projector 1 of the present embodiment, the inlet 700 is divided from the vicinity of the inlet 200. Thereby, the turbulent flow of the outside air inside the inlet 700 is further suppressed, and the outside air is efficiently introduced into each intake duct (the first intake duct 74, the second intake duct 75, and the third intake duct 76). be able to. Thereby, it becomes possible to reduce the rotation speed of each cooling fan (the 1st cooling fan 71, the 2nd cooling fan 72, and the 3rd cooling fan 73), and also noise reduction can be achieved. Therefore, it is possible to provide the projector 1 having a cooling mechanism section having an appropriate configuration for further reducing noise.

  (4) According to the projector 1 of the present embodiment, the inlet 700 has a predetermined area area (area area 700A for the first intake duct 74, area area 700B for the second intake duct 75, The third intake duct 76 is divided so as to have a region area 700C). Thereby, the quantity of the outside air which flows through the inside of each intake duct (74, 75, 76) can be set appropriately, and the member which generates heat can be cooled more efficiently. As a result, the rotational speed of each cooling fan (71, 72, 73) can be lowered, and noise can be further reduced. Therefore, it is possible to provide the projector 1 having a cooling mechanism section having an appropriate configuration for further reducing noise.

  (5) According to the projector 1 of the present embodiment, the air inlet 200 is installed on the bottom side 1 f of the main body of the projector 1. Thereby, it is possible to further prevent the rotation sound of the cooling fans (71, 72, 73) and the vibration sound accompanying the rotation from leaking to the outside of the projector 1, thereby further reducing the noise. Therefore, it is possible to provide the projector 1 having a cooling mechanism section having an appropriate configuration for further reducing noise.

  (6) According to the projector 1 of the present embodiment, in the intake air discharge device 70 constituting the cooling unit 7, the bottom surface direction of the first discharge duct 77 and the bottom surface other than the region of the inlet 700 of the second intake duct 75. The direction and the bottom surface direction of the third discharge duct 79 are open, and are closed by contacting a rib-shaped receiving portion 229 formed on the bottom surface 228 of the lower case 22 to function as a duct. Thereby, the thickness of the outer shape of the projector 1 can be reduced, and there is an effect that contributes to downsizing of the projector 1.

The present invention is not limited to the above-described embodiments, and various changes and improvements can be added. A modification will be described below.
(Modification 1) In the intake / discharge device 70 constituting the cooling unit 7 of the projector 1 in the embodiment, the first discharge duct 77 discharges the outside air to the optical device 44 and the polarization conversion element 414, and the second discharge duct. 78 discharges outside air to the light source device 411, and the third discharge duct 79 is configured to discharge outside air to the power supply unit 5. However, the present invention is not limited to this, and the number of discharge ducts, the number of cooling fans, the heat generating member of the discharge duct, etc. are appropriately changed in consideration of the heat generation amount of the heat generating member and the specifications of the cooling fan. It is good to configure.

  (Modification 2) The projector 1 according to the embodiment described above, in the air intake / discharge device 70 constituting the cooling unit 7, other than the area of the bottom surface direction of the first discharge duct 77 and the inlet 700 of the second air intake duct 75. The bottom surface direction and the bottom surface direction of the third discharge duct 79 are open and closed by abutting against a rib-shaped receiving portion 229 formed on the bottom surface 228 of the lower case 22 to function as a duct. However, the present invention is not limited to this, and when the projector 1 has a sufficient thickness, the opened portions may be covered and closed with separate members to form a duct. By doing so, it is possible to realize a cooling mechanism having a configuration capable of further reducing noise.

  (Modification 3) The projector 1 in the embodiment employs a high-pressure mercury lamp as the light source lamp 411A. However, the present invention is not limited to this, and an LED (Light Emitting Diode) may be employed as the light source lamp.

  (Modification 4) The projector 1 in the embodiment is a three-plate projector 1 using three liquid crystal panels 441. However, the present invention is not limited to this, and a single-plate projector 1 using one liquid crystal panel may be used.

  (Modification 5) The projector 1 in the embodiment employs a transmissive liquid crystal projector 1. However, the present invention is not limited to this, and a projector that adopts a DLP (registered trademark) (Digital Light Processing) system, a LCOS (Liquid Crystal On Silicon) system that is a reflective liquid crystal system, or the like may be used.

It is the schematic perspective view which looked at the projector which concerns on embodiment of this invention from the front side upper direction. It is the schematic perspective view which turned the projector upside down and was seen from the back side upper side. In FIG. 2, it is a schematic perspective view in the state which removed the inlet cover member and the dust-proof member. It is a figure which shows the internal structure of a projector. It is a figure which shows typically the optical system of an optical unit. It is the perspective view which shows the structure of the housing | casing for optical components, and is the perspective view which looked at the housing | casing for optical components from the back side upper direction. FIG. 7 is a perspective view showing the structure of the optical component casing in the same manner as FIG. 6, and is a perspective view of the optical component casing that is turned upside down and viewed from the bottom side. It is the perspective view which showed the state which installed the cooling unit in the lower case, and was seen from the back side upper side. FIG. 9 is a perspective view showing a state where the cooling unit is installed in the lower case, as seen from the upper front side, as in FIG. 8. It is the perspective view which looked at the cooling unit from the front side upper part. It is the perspective view which turned the cooling unit upside down and was seen from the front side upper part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Projector, 2 ... Exterior case, 3 ... Projection lens, 4 ... Optical unit, 5 ... Power supply unit, 7 ... Cooling unit, 21 ... Upper case, 22 ... Lower case, 23 ... Front case, 41 ... Integrator illumination optical system, 42 ... color separation optical system, 43 ... relay optical system, 44 ... optical device, 45 ... optical component casing, 46 ... component housing member, 47 ... lid member, 47A, 47B ... outflow opening, 48 ... light source Accommodating portion, 48A ... inflow opening, 48B ... outflow opening, 48C ... opening, 49 ... component housing portion, 49A ... inflow opening, 49B ... inflow opening, 50 ... power supply block, 51 ... lamp Drive block 70... Intake and discharge device, 71... First cooling fan, 71 A... Discharge port, 72... Second cooling fan, 72 A. First intake duct, 74A ... opening, 75 ... second intake duct, 75A ... opening, 76 ... third intake duct, 76A ... opening, 77 ... first discharge duct, 78 ... second discharge duct, 78A ... Discharge port, 79 ... third discharge duct, 80 ... exhaust device, 81 ... exhaust fan, 82 ... exhaust duct, 83 ... exhaust louver, 100 ... opening, 101 ... inlet cover member, 102,103 ... hole, 104 ... Lattice-like part, 200 ... Intake port, 228 ... Bottom surface, 229 ... Receiving part, 233 ... Exhaust port part, 411 ... Light source device, 411A ... Light source lamp, 414 ... Polarization conversion element, 441 ... Liquid crystal panel, 441B ... Blue light Liquid crystal panel, 441G ... green light liquid crystal panel, 441R ... red light liquid crystal panel, 442 ... incident polarizing plate, 442B ... blue light incident polarizing plate, 442G ... green light incident polarizing plate, 442R ... red light incident Polarizing plate, 444 ... Ejecting polarizing plate, 444B ... Blue light emitting polarizing plate, 444G ... Green light emitting polarizing plate, 444R ... Red light emitting polarizing plate, 502 ... Opening portion, 512 ... Opening portion, 700 ... Introduction port, 700A, 700B, 700C ... Area area, 771 ... R discharge duct, 771A ... Discharge port, 772 ... G discharge duct, 772A ... Discharge port, 773 ... B discharge duct, 773A ... Discharge port, 774 ... Discharge for polarization conversion element Duct, 774A ... discharge port, 791 ... discharge duct for power supply, 791A ... discharge port, 792 ... discharge duct for lamp driving, 792A ... discharge port.

Claims (5)

A projector including an image projection device that modulates a light beam emitted from a light source according to image information to form an optical image, and enlarges and projects the optical image on a screen, and a housing that houses the image projection device. There,
The projector has a cooling mechanism that cools a member that generates heat,
The cooling mechanism section is formed in the housing and includes a single intake port for taking outside air into the projector body, a plurality of cooling fans that discharge outside air to a member that generates heat inside the projector body, and the intake air A plurality of ducts for introducing outside air taken from the mouth into the cooling fan;
The plurality of ducts have integral inlets for introducing outside air taken in from the inlets in a region opposite to the inlets, and are connected to the respective cooling fans and configured integrally. Projector. The projector according to claim 1,
The projector is characterized in that the introduction port is divided according to the number of the ducts. The projector according to claim 2,
The projector is characterized in that the introduction port is divided from the vicinity of the intake port. The projector according to claim 2 or 3, wherein
The projector is characterized in that the introduction port is divided so as to have a predetermined area area. The projector according to any one of claims 1 to 4, wherein
The projector according to claim 1, wherein the air inlet is installed on a bottom surface side of the main body of the projector.

Images