JP2009047828A - Projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector where a DVD player and a projection device are integrated, and whose noise is made lower. <P>SOLUTION: The projector 1 is equipped with the projection device 2 modulating luminous flux from a light source part 411, according to an image signal and projecting it; the DVD player 3 playing back an image related to the image signal; a section member 6 partitioning off the projection device 2 and the DVD player 3; a player inlet 34 for taking-in player cooling air 55 to cool the DVD player 3; communication holes 61 and 62, provided on the section member 6 and introducing the player cooling air 55 from the DVD player 3 to the projection device 2; and an exhaust unit 7, provided in the projection device 2 and having an exhaust unit aperture 70 near the section member 6. The exhaust unit 7 exhausts the player cooling air 55, while forming air flows 55b and 55c leading them to the exhaust unit aperture 70 from the communication holes 61 and 62 and also exhausts projection device cooling air 50 which has cooled the projection device 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a composite type projector including an image reproducing device and a projection device.

  2. Description of the Related Art Conventionally, as a composite type projector, a projector having a configuration in which a DVD (Digital Versatile Disc) player, which is an image reproducing device, and a projection device are integrated is known. According to this projector, when reproducing a DVD and projecting the reproduced image on a screen, a complicated operation such as connecting the DVD player and the projection device with a cord is unnecessary. Thus, the user can view the content of the DVD by a simple operation of installing the projector facing the screen and inserting the DVD.

  Furthermore, the projector has an arrangement in which the projection device with a large amount of heat generation is located on the upper side of the DVD player, and the configuration is such that the heat of the projection device is not easily transmitted to the DVD player. It has an intake port, an exhaust port, and a fan, and is sufficiently cooled by the intake cooling air. The cooling air supplied for cooling is exhausted from the respective exhaust ports of the DVD player and the projection device. Also, the projection device and the DVD player are separated by a partition member, and the partition member is provided with an introduction port for introducing heat from the DVD player into the projection device at the most heat generating portion of the DVD player. The heat of the most heat generating part of the DVD player is sent to the projection device (for example, Patent Document 1).

JP 2006-72037 A

  However, since only the heat of the most heat generating portion of the DVD player is sent to the projection device, the DVD player portion requires an intake fan and an exhaust fan for cooling the entire DVD player portion, and the noise of the projector increases. Moreover, there existed a subject that the whole size will become large by arrange | positioning a fan.

  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]
The projector according to the application example includes a projection device that modulates and projects a light beam emitted from a light source unit according to an image signal, an image reproduction device that reproduces an image related to the image signal, the projection device, and the projection device. A partition member for partitioning the image reproducing device, a first air inlet for taking in the first cooling air for cooling the projection device, and a second for taking in the second cooling air for cooling the image reproducing device. A communication port for introducing the second cooling air from the image reproducing device to the projection device, the first cooling air provided in the projection device, and the And an exhaust unit having an exhaust fan for exhausting the second cooling air.

  According to this projector, the projection device and the image reproducing device provided via the partition member are configured to take in the first cooling air or the second cooling air and be cooled by the respective cooling air. ing. The projection device is cooled by the first cooling air taken in from the first intake port flowing through the inside of the projection device and exhausted from an exhaust unit provided in the projection device. The second cooling air taken in from the two intake ports flows through the inside of the image reproducing device and is cooled. The second cooling air cools the image reproducing device, is introduced from the communication port of the partition member to the projection device, and is exhausted together with the first cooling air from an exhaust unit provided in the projection device. Here, since the image reproducing device generates less heat than the projection device, the temperature rise of the second cooling air that has cooled the image reproducing device is also less than that of the first cooling air. Therefore, when the second cooling air is introduced to the projection device side, the temperature of the first cooling air can be lowered, and more effective cooling of the projection device can be performed between the communication port and the exhaust unit. Is possible. Further, the flow of the second cooling air from the second intake port through the communication port to the exhaust unit is formed by the exhaust force of the exhaust fan of the exhaust unit. The image reproducing apparatus can be sufficiently cooled only by providing the second intake port for taking in air. That is, the image reproducing apparatus does not require a space for providing an auxiliary device for cooling such as an exhaust fan for the image reproducing apparatus, and can be set to a minimum size. As a result, the projector can also be reduced in size and noise caused by the fan can be suppressed. Further, the second cooling air forms a forced flow by the exhaust unit, and even when the image reproducing apparatus having a large amount of heat generation is provided, the image reproducing apparatus can be sufficiently cooled.

  Application Example 2 In the projector according to the application example, the exhaust unit has an opening in the vicinity of the partition member, and the second cooling air is passed from the communication port to the exhaust unit by the communication port and the opening. It is preferable that a cooling flow path leading to is formed.

  According to this configuration, the second cooling air introduced from the communication port of the partition member to the projection device flows smoothly without staying between the partition member and the mechanism unit of the projection device, and the like. A cooling flow path that is discharged from the exhaust unit through the opening is formed. The opening is provided in the vicinity of the partition member of the exhaust unit. If there is an opening at this position, the second cooling air introduced from the communication port of the partition member can be easily sucked into the opening. By installing the opening, the second cooling air is introduced from the communication port to the projection device without any stagnation, and an air flow from the second air inlet to the opening is reliably formed. Therefore, new second cooling air is always sufficiently taken into the image reproducing apparatus from the second air inlet.

  Application Example 3 The projector according to the application example further includes an internal fan inside the projection apparatus, and the internal fan is the second cooling air from the first cooling air and the communication port. It is preferable that air is sent to the heat generating part of the projection device to cool the heat generating part.

  According to this configuration, the first cooling air and the second cooling air are sent to the heat generating part of the projection device by the internal fan separately from the exhaust fan that mainly guides the first cooling air and the second cooling air. Thus, the heat generating part can be cooled more effectively. In this case, the internal fan can cool the projection device uniformly by cooling the heat generating portion that is not sufficiently cooled by the flow of the first cooling air and the second cooling air by the exhaust fan. Is possible. By providing the internal fan, the flow of cooling air in the projection apparatus can be more reliably formed, and the projection apparatus and the image reproducing apparatus can be sufficiently cooled.

  Application Example 4 In the projector according to the application example, it is preferable that the first air inlet and the second air inlet are provided adjacent to a side facing the exhaust unit.

  According to this configuration, the first cooling air and the second cooling air flow in substantially the same direction in the projection device or the reproduction device, and cool the projection device or the reproduction device, respectively. Even if the first cooling air and the second cooling air flowing in substantially the same direction merge at the communication port, the flow is not disturbed, and the respective flows are substantially maintained and the exhaust air is exhausted smoothly. Such a smooth flow of the first cooling air and the second cooling air cools the projection device and the reproducing device more efficiently.

Hereinafter, specific embodiments of the projector will be described with reference to the drawings. The projector according to this embodiment modulates a light beam emitted from a light source unit with a liquid crystal panel according to an image signal, and projects a modulated image light from a projection unit onto a screen, and reproduces an image related to the image signal. This is an apparatus integrated with a DVD player (image reproduction apparatus). This projector is characterized by a configuration for cooling the projection device and the DVD player.
(Embodiment)

  First, the appearance specifications of the projector will be described. FIG. 1A is a perspective view of the projector according to the present embodiment as viewed from the front right side, and FIG. 1B is a perspective view of the projector as viewed from the front left side. The projector 1 has a substantially rectangular parallelepiped appearance, and includes a projection device 2 disposed on the upper side and a DVD player (image reproduction device) 3 disposed on the lower side. The projection device 2 has an upper exterior 21 that forms an upper surface, a front surface, a rear surface, a right side surface, and a left side surface. A light source lid 21a that can be opened and closed, an operation unit 22 that is located at a substantially central portion of the upper surface and has operation buttons for operating the projector 1, and is slidably opened and closed on the right side of the front side. And a focus cover 27 that enables the focus adjustment of the projection unit.

  Further, a projection port 23 through which image light projected from the projection unit passes and a projection port cover 26 that opens and closes the projection port 23 in conjunction with the focus cover 27 are provided on the front surface of the upper exterior 21. . Further, a projection device intake port (first intake port) 24 for taking cooling air into the projection device 2 is provided near the front surface of the upper exterior 21 on the right side surface. An exhaust port 25 for exhausting cooling air is provided on the side. The projector 1 is a so-called front type that is installed on the same side as the side on which the screen on which the image light is projected is viewed.

  The DVD player 3 has a lower exterior 31 that forms a front surface, a right side surface, a left side surface, and a lower surface, and a DVD insertion section 32 that is inserted to play a DVD is inserted on the front surface of the lower exterior surface 31. And an eject button 33 for extracting a DVD from the section 32. A player intake port (second intake port) 34 for taking cooling air into the DVD player 3 is provided on the right side surface of the lower exterior 31 adjacent to the projection device intake port 24. On the right side surface and the left side surface of the lower exterior 31, cover portions 15 respectively corresponding to the two speakers arranged on the left and right inside the back side are provided. In addition, in order to remove dust contained in the cooling air to be introduced, the projection device intake port 24 and the player intake port 34 are provided with dust removal filters (not shown) in the entire inner area of the projector intake port 24 and the player intake port 34, respectively. The cooling air taken in from the port 34 is exhausted from the exhaust port 25 together with the cooling air taken in from the projector intake port 24.

  Next, the mechanism part of the projection apparatus 2 accommodated in the upper exterior 21 will be described. FIG. 2 is a perspective view showing an internal configuration of the projection apparatus. As shown in FIG. 2, the projection device 2 and the DVD player 3 are partitioned by a partition member 6, and the partition member 6 includes a flat surface portion 6 a that covers and covers the upper portion of the lower exterior 31 of the DVD player 3. , And an outer edge portion 6b that rises toward the projection device 2 along the outer edge of the flat surface portion 6a. When the upper exterior 21 (FIG. 1) is guided and attached to the outer edge 6b, the partition member 6 is accommodated in the upper exterior 21 and hidden from the outside. The mechanism portion of the projection device 2 is placed on the flat surface portion 6 a of the partition member 6.

  The mechanism unit of the projection device 2 includes an intake fan 10 for taking in the projection device cooling air (first cooling air) 50 from the projection device intake port 24 and the projection device cooling air 50 taken in by the intake fan 10 to the mechanism unit. Adjacent to the duct 11 for guiding and the intake fan 10, the projection unit 5 for projecting image light through the projection port 23 (FIG. 1) of the upper exterior 21, and one end on the front side of the partition member 6, the exhaust port 25. On the back side of the other end of the power supply unit 8, an internal fan 9 that sends the projection device cooling air 50 to the power supply unit 8, and on the back side of the power supply unit 8. And an exhaust unit 7 positioned obliquely opposite the exhaust port 25. Further, the mechanism unit is provided above the optical unit 4 and the optical unit 4 (41, 42, 43, 44) arranged in an approximately L shape when viewed from the upper surface side from the exhaust unit 7 to the projection unit 5. The circuit board 12 includes several types of connector terminals 29 that are provided on the back side of the circuit board 12 and connect the reproduction apparatus other than the DVD player 3 and the projection apparatus 2.

  The optical unit 4 which is the main part of the projection apparatus 2 includes an integrator illumination unit 41 having a light source unit in the vicinity of the exhaust unit 7, a color separation unit 42, a relay optical unit 43, and three liquid crystal panels (not shown). ) Is housed inside, and the optical modulation unit 44 is connected to the projection unit 5. In FIG. 2, three FPCs (flexible printed circuit boards) 45 that connect the liquid crystal panel and the circuit board 12 are shown. The optical unit 4 having such a configuration is housed in a substantially L-shaped housing and placed on the partition member 6. In this case, a gap is provided between the lower portion of the housing and the upper cover of the duct 11 and the flat portion 6 a of the partition member 6. Note that player cooling air (second cooling air) 55 for cooling the DVD player 3 is taken in from the player inlet 34 of the DVD player 3.

  Hereinafter, the optical unit 4 will be described. FIG. 3 is a perspective view showing a detailed configuration of the optical unit. As shown in FIG. 3, the integrator illumination unit 41 forms an image on three liquid crystal panels 441 constituting the optical modulation unit 44 (respectively, liquid crystal panels 441R, 441G, and 441B for red, green, and blue color lights). It is an optical system for illuminating a region substantially uniformly, and includes a light source unit 411 having a light source lamp 416 and a reflector 417, a first lens array 412, a second lens array 413, a polarization conversion element 414, and a superimposing lens 415. And have.

  The light source unit 411 reflects the radial light beam emitted from the light source lamp 416 by the reflector 417 to be a parallel light beam, and emits the parallel light beam to the first lens array 412. The first lens array 412 has a configuration in which small lenses having a substantially rectangular outline when viewed from the optical axis direction are arranged in a matrix, and each small lens receives a plurality of light beams emitted from the light source lamp 416. Are divided into partial luminous fluxes. The contour shape of each small lens is set so as to be almost similar to the shape of the image forming area of the liquid crystal panel 441. For example, if the aspect ratio (ratio of horizontal and vertical dimensions) of the image forming area of the liquid crystal panel 441 is 4: 3, the aspect ratio of each small lens is also set to 4: 3. The second lens array 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 the liquid crystal panel 441 together with the superimposing lens 415.

  The polarization conversion element 414 is disposed between the second lens array 413 and the superimposing lens 415 and is unitized with the second lens array 413. Such a polarization conversion element 414 converts the light from the second lens array 413 into a single type of polarized light, thereby improving the light use efficiency in the optical modulator 44.

  More specifically, each partial light converted into one kind of polarized light by the polarization conversion element 414 is finally superimposed on the liquid crystal panel 441 of the optical modulation unit 44 by the superimposing lens 415. Since only one type of polarized light can be used in the projection apparatus 2 using the liquid crystal panel 441 of the type that modulates polarized light, almost half of the light from the light source lamp 416 that emits other types of random polarized light is not used. Therefore, by using the polarization conversion element 414, all the light beams emitted from the light source lamp 416 are converted into one type of polarized light, and the light use efficiency in the optical modulation unit 44 is increased.

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

  The relay optical unit 43 includes an incident side lens 431, a relay lens 433, and reflection mirrors 432 and 434, and has a function of guiding red light, which is color light separated by the color separation unit 42, to the liquid crystal panel 441R. Yes.

  At this time, the dichroic mirror 421 of the color separation unit 42 transmits the red light component and the green light component of the light beam emitted from the integrator illumination unit 41, and reflects the blue light component. The blue light reflected by the dichroic mirror 421 is reflected by the reflection mirror 423, passes through the field lens 418, and reaches the blue liquid crystal panel 441B. The field lens 418 converts each partial light beam emitted from the second lens array 413 into a light beam parallel to the central axis. The same applies to the field lens 418 provided on the light incident side of the other liquid crystal panels 441G and 441R.

  Of the red 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 418, and reaches the liquid crystal panel 441G for green. On the other hand, the red light passes through the dichroic mirror 422, passes through the relay optical unit 43, passes through the field lens 418, and reaches the liquid crystal panel 441R for red light. Here, the reason why the relay optical unit 43 is used for red light is that the length of the optical path of red light is longer than the length of the optical path of other color lights, so that the light use efficiency is reduced due to light diffusion or the like. This is to prevent it. That is, the partial light beam incident on the incident side lens 431 can be transmitted to the field lens 418 as it is. In addition, it is good also as a structure which guides blue light instead of the structure which guides red light to the relay optical part 43, for example.

  The optical modulation unit 44 modulates an incident light beam according to an image signal to form a color image, and includes three incident-side polarizing plates 442 on which the respective color lights separated by the color separation unit 42 are incident. The liquid crystal panels 441R, 441G, 441B arranged at the rear stage of the incident side polarizing plates 442, the emission side polarizing plate 443 arranged at the rear stage of the liquid crystal panels 441R, 441G, 441B, and color synthesis And a cross dichroic prism 444 which is an optical system.

  In this case, the liquid crystal panels 441R, 441G, 441B use polysilicon TFTs as switching elements. In the optical modulation unit 44, each color light separated by the color separation unit 42 is modulated in accordance with an image signal by the three liquid crystal panels 441R, 441G, 441B, the incident side polarizing plate 442, and the emission side polarizing plate 443. The optical image is formed.

  The incident-side polarizing plate 442 transmits only polarized light in a certain direction out of each color light separated by the color separation unit 42 and absorbs other light beams. A polarizing film is attached to a substrate such as sapphire glass. It is a thing. The exit-side polarizing plate 443 is configured in substantially the same manner as the incident-side polarizing plate 442, and transmits only polarized light in a predetermined direction out of the light beams emitted from the liquid crystal panel 441 (441R, 441G, 441B), and transmits the other light beams. Absorb. The incident side polarizing plate 442 and the exit side polarizing plate 443 are set so that the directions of the polarization axes thereof are orthogonal to each other.

  The cross dichroic prism 444 forms a color image by synthesizing optical images emitted from the emission-side polarizing plate 443 and modulated for each color light. The cross dichroic prism 444 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 multilayer film. The color image synthesized by the cross dichroic prism 444 is enlarged and projected by a projection lens provided in the projection unit 5.

  Next, cooling of the projection device 2 will be described. FIG. 4 is a perspective view showing the flow of cooling air in the projection apparatus. In FIG. 4, the optical unit 4, the projection unit 5, the circuit board 12, the upper cover of the duct 11 and the like are removed to make the flow of the cooling air easy to understand. Hereinafter, description will be made with reference to FIGS. 2 and 3 in addition to FIG. Projection device cooling air 50 for cooling the projection device 2 is taken in by the intake fan 10 via the projection device inlet 24 and sent to the duct 11 as an air flow 50a. The air flow 50a is guided to the duct 11 and reaches the lower side of the liquid crystal panel 441 of the optical modulation unit 44, and then blows upward like an air flow 50b from a blow-out opening (not shown) opened in the upper cover of the duct 11. The liquid crystal panel 441 is mainly cooled by entering into the housing of the optical unit 4. The air flow 50b that cools the liquid crystal panel 441 cools the IC (Integrated Circuit) and the like of the circuit board 12 while flowing along the circuit board 12 out of the housing.

  Further, the air flow 50a is blown upward like the air flow 50c from the lower side of the polarization conversion element 414 of the integrator illuminating unit 41 in the same manner as the cooling of the liquid crystal panel 441 to mainly cool the polarization conversion element 414. The air flow 50c that cools the polarization conversion element 414 becomes an air flow 50d that merges with the air flow 50b. After the light source unit 411 is cooled, the exhaust fan 7a of the exhaust unit 7 converts the air flow 50c into an exhaust air flow 50f. 25 is exhausted out of the projection device 2. At this time, part of the air flow 50 b and the air flow 50 c is sucked by the internal fan 9 that forms the air flow 50 e that cools the power supply unit 8 and sent to the power supply unit 8.

  The power supply unit 8 is configured in two stages including a power supply block and a light source drive block. The power supply block supplies power supplied from the outside to the light source drive block and the circuit board 12 through a power cable. Yes. The light source drive block is for supplying the power supplied from the power supply block to the light source lamp 416 constituting the light source unit. These power supply block and light source drive block are arranged vertically in parallel and are each covered and held by a cylindrical member (not shown). The cylindrical member is opened on the side of the internal fan 9 and the exhaust port 25, holds the power supply block and the light source drive block, and also has a function as a duct for guiding the air flow 50e. The air flow 50e that has cooled the power supply unit 8 is exhausted from the exhaust port 25 to the outside of the projection device 2 as an exhaust air flow 50f.

  Moreover, the partition member 6 has two communication ports 61 and 62 near the center of the flat surface portion 6a, and the player cooling air 55 that has cooled the DVD player 3 is projected through these communication ports 61 and 62 to the projection device. 2 is introduced. The communication ports 61 and 62 are within a range from the rear side of the internal fan 9 to the lower side of the optical unit 4 and from the vicinity of the duct 11 to the vicinity of the exhaust unit 7 when viewed from the projection device 2 side. Is provided. The other communication port 62 is provided near the lower portion of the color separation unit 42 of the optical unit 4.

  Next, the DVD player 3 will be described. FIG. 5 is a perspective view showing the configuration of the DVD player and the flow of cooling air. First, the configuration of the DVD player 3 will be described with reference to FIG. 4 in addition to FIG. The mechanism part of the DVD player 3 is housed in the lower exterior 31, is located adjacent to the DVD insertion part 32 of the lower exterior 31, and has a drive unit 35 that drives the DVD inserted from the DVD insertion part 32, and the lower part A circuit unit 36 that controls the mechanism unit, is positioned on the player inlet 34 side of the exterior 31, a pair of speakers 16 that are respectively disposed on the back side of the drive unit 35 and the circuit unit 36, and the partition member 6 at the bottom And nine partition member guides 37 for positioning and attaching to the exterior 31.

  The drive unit 35 has a pickup, and reads the digital video signal recorded on the inserted DVD by the pickup. The read digital video signal is sent as an image signal to the projection apparatus 2 via the circuit unit 36. Based on this image signal, the projection device 2 projects the color image formed by the optical unit 4 from the projection unit 5 as described with reference to FIG. When viewed from the DVD player 3 side, the communication ports 61 and 62 are provided above the circuit unit 36 to the pickup of the drive unit 35, and the communication port 62 is on the back side of the circuit unit 36. It is provided above.

  Since the DVD player 3 is an element that generates heat from the pickup of the drive unit 35 and the IC of the circuit unit 36, the pickup and IC are cooled by the player cooling air 55 (FIG. 2) taken from the player air inlet 34. is doing. More specifically, the player cooling air 55 first flows through the circuit unit 36 as an air flow 55a for cooling the IC and the like of the circuit unit 36, and a part of the air flow 55a passes through the communication port 62 like an air flow 55c. It flows to the projection device 2 side. A part of the air flow 55a flows from the circuit unit 36 to the drive unit 35, mainly cools the pickup, and flows from the communication port 61 to the projection device 2 as in the air flow 55b.

  The configuration for cooling the DVD player 3 is only the player intake port 34 provided in the lower exterior 31 and the communication ports 61 and 62 provided in the partition member 6. It does not require new space. By providing the communication ports 61 and 62 at such positions, the player cooling air 55 from the player intake port 34 flows to the communication ports 61 and 62 after cooling the pickup of the circuit unit 36 and the drive unit 35. The DVD player 3 can be cooled efficiently. Therefore, since it is not necessary to provide an intake fan or the like, there is almost no noise related to the cooling of the DVD player 3, and the projector 1 can be reduced in noise. Further, the DVD player 3 only needs to have a mechanism for reproducing a DVD, and can be further miniaturized.

  Next, a configuration for reliably forming the air flow 55b and the air flow 55c flowing through the DVD player 3 and introducing them into the projection device 2 will be described. FIG. 6 is a perspective view showing the flow of cooling air through the exhaust unit opening. FIG. 6 shows a state where the power supply unit 8 and the internal fan 9 shown in FIG. 4 are further removed. As shown in FIG. 6, the exhaust unit 7 has an exhaust unit opening (opening) 70 in the vicinity of the communication port 61 provided in the flat portion 6 a of the partition member 6. The exhaust unit opening 70 forms a flow for sucking the air flows 55b and 55c from the communication ports 61 and 62 to the exhaust unit 7 separately from the flow path for exhausting the air flow 50d shown in FIG. It is for exhausting as 50f.

  Here, the communication ports 61 and 62 are covered with the optical unit 4 from above, and the gap between the flat surface portion 6a and the optical unit 4 is reduced by the thin design. For this reason, the air flows 55b and 55c can be obtained from the communication ports 61 and 62 only by attracting the air flows 55b and 55c by the air flow 50d and the air flow 50e for cooling the projection device 2 without providing the exhaust unit opening 70. Can not be sufficiently sucked. Therefore, by providing the exhaust unit opening 70, a cooling flow path from the communication ports 61 and 62 to the exhaust unit 70 is formed. By forming the cooling flow path, the air flow 55 b flows from the communication port 61 to the exhaust unit 70. Further, the air flow 55c from the communication port 62 is formed more powerfully by multiplying the flow of the air flow 55b. Further, the exhaust unit opening 70 is formed so that the height of the opening is between the flat part 6 a and the optical unit 4, and the air flows 55 b and 55 c are more likely to flow between the flat part 6 a and the optical unit 4. It is comprised so that it may become.

  In this way, a cooling flow path is formed along the flat surface portion 6a below the optical unit 4, and the air flow 55b and the air flow 55c flow, whereby the player cooling air 55 is communicated from the player intake port 34 to the communication port. The DVD player 3 can be sufficiently cooled by reliably flowing to 61 or the communication port 62.

  Further, part of the airflows 55b and 55c becomes an airflow 55d sucked into the internal fan 9, and cools the power supply unit 8 together with the airflow 50e (FIG. 4). The air streams 55b and 55c that cool the DVD player 3 that generates relatively little heat with respect to the optical unit 4 are lower in temperature than the air stream 50e that cools the optical unit 4, and are mixed with the air stream 50e. It can cool more effectively. In this case, the power supply unit 8 corresponds to a heat generating unit cooled by the internal fan 9.

  As described above, the projector 1 includes the projection device intake port 24, the player intake port 34, the communication ports 61 and 62, and the exhaust unit 7 having the exhaust unit opening 70. 2 and the DVD player 3 are efficiently cooled. Thereby, low noise and miniaturization of the projector 1 are realized.

  Hereinafter, main effects of the embodiment will be described together.

  The DVD player 3 included in the projector 1 is taken in from the player air inlet 34, sucked into the exhaust unit opening 70 of the projection device 2, and player cooling air 55 that forms a series of flows from the communication ports 61 and 62 to the projection device 2. Cooled by. Further, since the exhaust unit opening 70 of the exhaust unit 7 is provided in the vicinity of the flat surface portion 6a of the partition member 6, air flows 55b and 55c that cool the DVD player 3 are communicated from the communication ports 61 and 62 of the flat surface portion 6a. A cooling channel introduced to the projection device 2 side can be formed. Thus, the projector cooling air 50 and the player cooling air 55 can be efficiently exhausted only by the exhaust unit 7 of the projection device 2, and a fan for the DVD player 3 becomes unnecessary. Therefore, noise can be suppressed.

  Since the DVD player 3 can be cooled only by providing the player inlet 34 for taking in the player cooling air 55 in the DVD player 3, the DVD player 3 can be set to a substantially minimum size. Thereby, the projector 1 having the projection device 2 and the DVD player 3 can be further downsized.

  Since the projector 1 has the internal fan 9, the air flows 50b, 50c, and 50d by the exhaust unit 7 can be cooled by sending the air flows 50e and 55d to the power supply unit 8 that is not sufficiently cooled. Moreover, since the air flow 55b that has cooled the DVD player 3 can be taken into the projection device 2 by the internal fan 9, the cooling efficiency can be further increased.

  In the projector 1, the projection device 2 and the DVD player 3 are partitioned by the partition member 6, and each functional area is clear, so that maintenance, inspection and repair are easy to perform.

  Further, the projector 1 is not limited to the above-described embodiment, and the same effects as those of the embodiment can be obtained even if the projector 1 is in the form of the following modification.

  The communication ports 61 and 62 provided in the partition member 6 are set at two places, but are not limited to two places, and may be set at one place or three or more places. However, in order to form a smooth air flow 55b, 55c by the exhaust unit opening 70 and cool the pickup of the drive unit 35 and the circuit unit 36 of the DVD player 3, the configuration of the embodiment is preferable.

  The player inlet 34 of the DVD player 3 is arranged adjacent to the projector inlet 24, but is not limited to this arrangement, and is provided at other positions depending on the arrangement of the mechanism portion of the DVD player 3 and the like. May be.

  The air flows 50e and 55d for cooling the power supply unit 8 are directly exhausted from the exhaust port 25 after the power supply unit 8 is cooled, but are exhausted through the exhaust unit 7 in the same manner as the air flow 50d. May be. Thereby, the load of the internal fan 9 can be reduced.

  The heat generating part cooled by the internal fan 9 of the projection device 2 is not limited to the power supply part 8, and may be the light source part 411, for example. Thereby, according to the layout of the mechanism part of the projection apparatus 2, a flexible cooling structure can be developed.

  The projector 1 includes the DVD player 3 as a playback device, but is not limited to the DVD player 3 and may be a video cassette recorder or the like. Further, the projector is not limited to the front type projector 1, and may be a so-called rear type projector that projects image light from the side opposite to the screen viewing side.

  Although the projector 1 uses the liquid crystal panel 441 as the optical modulation unit 44, a device such as a micromirror other than the liquid crystal panel 441 may be used. This correspondence makes it possible to use the projection device 2 having various optical modulation units.

(A) The perspective view which looked at the projector concerning this embodiment from the front right side, (b) The perspective view which looked at the projector from the front left side. The perspective view which shows the internal structure of a projection apparatus. The perspective view which shows the detailed structure of an optical unit. The perspective view which shows the flow of the cooling air in a projection apparatus. The perspective view which shows the structure of a DVD player, and the flow of cooling air. The perspective view which shows the flow of the cooling air by exhaust unit opening.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Projector, 2 ... Projection apparatus, 3 ... DVD player as an image reproduction apparatus, 4 ... Optical unit, 5 ... Projection part, 6 ... Partition member, 6a ... Plane part, 6b ... Outer edge part, 7 ... Exhaust unit, 7a DESCRIPTION OF SYMBOLS ... Exhaust fan, 8 ... Power supply part as a heat-generating part, 9 ... Internal fan, 10 ... Intake fan, 11 ... Duct, 12 ... Circuit board, 21 ... Upper exterior, 22 ... Operation part, 23 ... Projection port, 24th Projection device intake port as 1 intake port, 25 ... exhaust port, 31 ... lower exterior, 32 ... DVD insertion portion, 34 ... player intake port as second intake port, 35 ... drive unit, 36 ... circuit unit, DESCRIPTION OF SYMBOLS 41 ... Integrator illumination part, 42 ... Color separation part, 43 ... Relay optical part, 44 ... Optical modulation part, 50 ... Projector cooling air as 1st cooling air, 55 ... Player cooling air as 2nd cooling air 61,62 ... communication port, 70 ... exhaust unit opening as an aperture.

Claims (4)

A projection device that modulates and projects the light beam emitted from the light source unit according to the image signal;
An image reproducing device for reproducing an image related to the image signal;
A partition member for partitioning the projection device and the image reproduction device;
A first inlet for taking in a first cooling air for cooling the projection device;
A second air inlet for taking in second cooling air for cooling the image reproducing device;
A communication port provided in the partition member for introducing the second cooling air from the image reproduction device to the projection device;
A projector comprising: an exhaust unit provided in the projection device and having an exhaust fan for exhausting the first cooling air and the second cooling air. The projector according to claim 1, wherein
The exhaust unit has an opening in the vicinity of the partition member,
By the communication port and the opening,
A projector having a cooling flow path for guiding the second cooling air from the communication port to the exhaust unit. The projector according to claim 1 or 2,
Inside the projection device, further has an internal fan,
The projector, wherein the internal fan sends the first cooling air and the second cooling air from the communication port to a heat generating part of the projection device to cool the heat generating part. The projector according to any one of claims 1 to 3,
The projector according to claim 1, wherein the first air inlet and the second air inlet are provided adjacent to a side facing the exhaust unit.

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