JP5163927B2 - projector - Google Patents

Description

  The present invention relates to a projector characterized by a cooling fan.

  2. Description of the Related Art Today, data projectors are widely used as image projection apparatuses that project a screen of a personal computer, a video image, an image based on image data stored in a memory card or the like onto a screen.

  This data projector incorporates a compact high-intensity light source device such as a metal highland lamp or an ultra-high pressure mercury lamp, and condenses the light emitted from this light source on a micromirror display element called DMD or a liquid crystal display element. The color image is displayed on the screen by the reflected light or transmitted light of these display elements.

  Since a metal highland lamp, an ultrahigh pressure mercury lamp, or the like as a light source device in such a projector has a high temperature close to 1000 ° C., an air cooling mechanism in the projector housing is important, and a cooling fan is used as the air cooling mechanism of the projector. Is common.

This cooling fan is used not only for projectors but also for many electronic devices, and various proposals have been made such as improving the function of the cooling fan, the arrangement method for electronic devices, and the arrangement position. For example, Japanese Patent Laying-Open No. 2003-209111 (Patent Document 1) proposes an invention in which cooling efficiency is improved by integrally forming a cooling fan and a heat conducting plate that receives heat from a heat source.
JP 2003-209111 A

  However, since recent projectors are becoming smaller and thinner, there is a space for arranging a cooling fan that can sufficiently cool the inside of a projector housing having a light source device that has a high temperature close to 1,000 ° C. It is difficult to ensure, and this has been an obstacle to miniaturization and thinning of the projector.

  The present invention has been made in view of the problems of the prior art as described above, and is provided with a cooling fan that can be arranged in a thin casing and can sufficiently cool the inside of the casing. An object is to provide a projector.

A projector according to the present invention includes a light source device, a light source side optical system, a display element, a projection side optical system, a cooling fan, and a rectangular housing that contains a circuit board. A fan case whose one surface is closed by a circuit board; a stator of a fan motor provided on the circuit board; and a fan that is rotatable relative to the stator and includes a rotor magnet and rotating blades. The circuit elements mounted on the circuit board are disposed in the internal space of the cooling fan , the circuit board has the stator on the upper surface and the lower surface, the rotor magnet on the upper surface and the lower surface of the circuit board, and fan and fan case having a rotary blade is respectively arranged, the fan is shall be a different fan of each performance.

  According to the present invention, it is possible to provide a thin projector having a high cooling efficiency and provided with a cooling fan that can be arranged in a thin housing and can sufficiently cool the inside of the housing.

  The projector 10 of the best mode for carrying out the present invention includes a light source device 63, a color wheel 71, a light source side optical system, a display element 51, a projection side optical system 62, a cooling fan 131, and a control circuit. A board 103, a power supply control circuit board 102 to which a lamp power circuit block 101 is attached, and a rectangular casing in which these boards are built.

The cooling fan 131, the control circuit board 103 one surface of the fan case 133 is closed, the stator 134 with a built-in coil to the control circuit board 103 is fixed, b over data magnet with a magnet on the stator 134 A fan 132 having rotating blades integrally fixing 140 is mounted on a stator 134 and covered with a fan case 133.

  The interior of the projector 10 is divided into an intake side space chamber 121 where the suction port 137 of the cooling fan 131 is located and an exhaust side space chamber 122 where the discharge port 138 of the cooling fan 131 is located. The side space chamber 121 and the exhaust side space chamber 122 are airtightly partitioned by a partition wall 120.

  Further, the control circuit board 103 includes a cooling fan control circuit, the fan case 133 has a hollow and thin cylindrical shape, and has a side cover that opens the bottom surface and a cutout that becomes a suction port 137 at the center of the top surface. A face plate is provided, the opposing surface of the top plate is closed by the control circuit board 103, and an opening to be the discharge port 138 is provided at an arbitrary position on the side surface.

  Further, the housing has a top plate 11 and a bottom plate 16, the control circuit board 103 is located near the top plate 11 of the projector housing, and the suction port 137 is located near the bottom plate 16 of the projector housing. It is what.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, a projector 10 according to one embodiment of the present invention has a substantially rectangular parallelepiped shape, and has a lens cover 19 that covers a projection port on the side of a front plate 12 disposed in front of a main body case. The front plate 12 is provided with a plurality of exhaust holes 17. Further, although not shown, an Ir receiver for receiving a control signal from the remote controller is provided.

  The top plate 11 as a main body case is provided with a key / indicator section 37. The key / indicator section 37 includes a power switch key, a power indicator for notifying power on / off, and a lamp of the light source device. A key or indicator such as a lamp switch key for turning on the lamp, a lamp indicator for displaying the lighting of the lamp, an overheating indicator for notifying when the light source device or the like overheats is provided.

Further, on the back surface of the main body case, there are provided various terminals 20 such as an input / output connector portion and a power adapter plug for providing a USB terminal, a D-SUB terminal for inputting image signals, an S terminal, an RCA terminal and the like on the back plate. Is.
A plurality of air intake holes 18 are provided in the right side plate, which is a side plate of the main body case (not shown), and the left side plate 15, which is the side plate shown in FIG.

  As shown in FIG. 2, the projector control means control circuit of the projector 10 includes a control unit 38, an input / output interface 22, an image conversion unit 23, a display encoder 24, a display drive unit 26, and the like. Various standard image signals input from the input / output connector unit 21 are converted to an image signal of a predetermined format suitable for display by the image conversion unit 23 via the input / output interface 22 and the system bus (SB). Then, it is sent to the display encoder 24.

  The display encoder 24 develops and stores the transmitted image signal in the video RAM 25, generates a video signal from the stored contents of the video RAM 25, and outputs the video signal to the display drive unit 26.

  A display drive unit 26 to which a video signal is input from the display encoder 24 drives a display element 51, which is a spatial light modulation element (SOM), at an appropriate frame rate corresponding to the image signal sent. A projection lens group that forms a light image with the reflected light of the display element 51 and makes it a projection-side optical system 62 by making light from the light source device 63 incident on the display element 51 through the light source-side optical system. The movable lens group 97 of the projection system lens group is driven for zoom adjustment and focus adjustment by the lens motor 45.

  In addition, the image compression / decompression unit 31 performs a recording process for sequentially writing a luminance signal and a color difference signal of an image signal to a memory card 32 that is a removable recording medium by performing data compression by processing such as ADTC and Huffman coding. In the mode, the image data recorded on the memory card 32 is read out, and individual image data constituting a series of moving images is decompressed in units of one frame and sent to the display encoder 24 via the image conversion unit 23. A moving image or the like can be displayed based on the stored image data.

  The control unit 38 controls the operation of each circuit in the projector 10, and includes a ROM that stores operation programs such as a CPU and various settings fixedly, and a RAM that is used as a work memory. ing.

  Further, the operation signal of the key / indicator unit 37 composed of the main key and the indicator provided on the upper surface plate 11 of the main body case is directly sent to the control unit 38, and the key operation signal from the remote controller is received by Ir. The code signal received by the unit 35 and demodulated by the Ir processing unit 36 is sent to the control unit 38.

  An audio processing unit 47 is connected to the control unit 38 via a system bus (SB). The audio processing unit 47 includes a sound source circuit such as a PCM sound source, and converts the audio data into analog data in the projection mode and the playback mode. The speaker 48 can be driven to emit loud sounds.

  The control unit 38 controls the power supply control circuit 41. When the lamp switch key is operated, the power supply control circuit 41 turns on the discharge lamp 64 of the light source device, and further the cooling fan drive control circuit 43. The temperature detection is performed by a plurality of temperature sensors provided in the light source device, etc., and the rotation speed of the cooling fan is controlled, and the rotation of the cooling fan is continued even after the light source device lamp is turned off by a timer, etc. Further, depending on the result of temperature detection by the temperature sensor, control such as stopping the light source device and turning off the power of the projector main body is also performed.

  These ROM, RAM, IC, and circuit elements are attached to the control circuit board 103 as the main control board shown in FIG. 3, and the power system power supply control circuit 41 is incorporated into the lamp power supply circuit block 101 to supply power. The control circuit board 102 is attached to the control circuit board 102. The control circuit board 103, which is the main control board of the control system, and the power control circuit board 102 to which the lamp power circuit block 101, etc. of the power system are attached are formed separately. .

  As shown in FIG. 3, the internal structure of the projector 10 includes a power supply control circuit board 102 on which a lamp power supply circuit block 101 and the like are attached as a circuit board, and a control circuit board 103. Then, the power supply control circuit board 102 is arranged in the vicinity of the right side plate 14, and the inside of the housing is made airtight between the intake side space chamber 121 on the back plate 13 side and the exhaust side space chamber 122 on the front plate 12 side by the partition wall 120. The control circuit board 103 is disposed in the intake-side space chamber 121, a sirocco fan type blower is disposed under the control circuit board 103 as a cooling fan, and the cooling fan is disposed in the exhaust-side space chamber 122. Discharge port is arranged.

  Further, as shown in FIG. 4, a light source device 63 is disposed in the exhaust side space 122, an optical system unit 77 is disposed along the left side plate 15, an illumination side block 78, an image generation block 79, a projection The illumination side block 78 of the optical system unit 77 configured with the side block 80 is in open communication with the exhaust side space chamber 122 so that a part of the optical system unit 77 is located in the exhaust side space chamber 122, and the exhaust side An exhaust temperature reducing device 114 is disposed along the front plate 12 of the space chamber 122.

  The optical system unit 77, as shown in FIG. 5, is composed of three blocks, an illumination side block 78 located in the vicinity of the light source device 63, an image generation block 79, and a projection side block 80. The illumination side block 78 is provided with a reflection mirror 72 that reflects light emitted from the light source device 63 to the color wheel 71 and color filters for red light, green light, and blue light, and is rotated by the wheel motor 73. And a light tunnel 75 that converts the light transmitted through the filter of the color wheel 71 into a light beam having a uniform intensity distribution. Further, an illumination-side block partition wall 127 connected to the partition partition wall 120 so as to penetrate the light tunnel 75 is provided. Further, the illumination-side block partition wall 127 has a cutout 129 serving as an air flow path in the upper part near the light tunnel 75.

  The image generation block 79 includes a second reflection mirror 74 that changes the direction of light emitted from the light tunnel 75, and a plurality of lenses that condenses the light reflected by the second reflection mirror 74 on the display element 51. A light source side lens group 83 formed in step (1), an irradiation mirror 84 for irradiating the light transmitted through the light source side lens group 83 to the display element 51 at a predetermined angle, and the DMD (digital micromirror) serving as the display element 51 A device), a display element unit for holding the display element 51, and the like. A display element heat dissipation plate 53 for cooling the display element 51 is disposed on the back plate 13 side of the display element 51.

  Further, the projection side block 80 has a lens group of the projection side optical system 62 that emits light that is reflected by the display element 51 and forms an image to the screen. The projection side optical system 62 includes a fixed lens barrel. The lens is composed of a fixed lens group 93 built in the lens and a movable lens group 97 built in the movable lens barrel, and is a variable focus type lens having a zoom function. The lens is moved by moving the movable lens group 97 by a lens motor. Adjustment and focus adjustment are possible.

  In addition, an optical system control board 86 for controlling zoom and focus adjustment of the projection side optical system is disposed between the optical system unit 77 and the left side plate 15. By controlling the operation of the movable lens group 97, a zoom function and focus adjustment can be performed.

  Further, the illumination side block 78 and the projection side block 80 are arranged adjacent to each other so as to form a gap 128 serving as a cooling air flow path between both blocks, and a part of each block has an outer wall. It has. The image generation block 79 connects the illumination side block 78 and the projection side block 80, and the optical system unit 77 has the optical axis of the illumination side block 78 and the optical axis of the projection side block 80 parallel to each other as a whole. It has a shape of the shape.

Then, as shown in FIG. 6, the cooling fan 131 for cooling the projector housing are type blower having a an inlet 137 discharge port 138, integrated with the control circuit board 103, a B over data magnet The fan 132 having the rotating blades configured in general , the fan case 133, and the stator 134 for rotating the fan 132 having the rotating blades are formed. The fan case 133 has a thin hollow cylindrical side cover. And a flat top plate having a suction port 137 at the center.

  This control circuit board 103 includes a cooling fan control circuit and a stator 134, has a locking hole 136 to which the fan case 133 is fixed, and serves as a main board of the projector 10 as described above. A circuit of the fan 131 is attached to block one surface of the cooling fan 131.

And, the fan 132 having a rotary blade, which has a stator cover portion 139 for covering the stator 134 to the central center, not shown, which connects the fitted through the bearing 134a of the stator 134 to be described later in the center of the stator cover 139 It has a shaft portion (not shown), a rotor magnet 140 is laid on the periphery of the stator cover portion 139, and rectangular blades are laid on the outer periphery of the stator cover portion 139. Intake air and exhaust from the side

  The fan case 133 has an opening on one side, a cutout serving as a suction port 137 at the center of the upper surface plate facing the opened surface, and a blowout port serving as a discharge port 138 in a part of the side cover. ing. Further, a plurality of locking claws 135 for attaching to the control circuit board 103 are provided at arbitrary positions on the side surface.

  As shown in FIG. 6, the stator 134 is formed so that a plurality of magnetic poles are generated by a coil, and includes a bearing 134a through which the shaft portion of the fan 132 penetrates at the center. It is what is arranged.

Its to 7, attached to such and fitted through the shaft of the fan 132 with a rotating blade to a bearing 134a of the stator 134, covers the periphery of the stator 134 by the stator cover 139, fan case The peripheral edge of the fan 132 having the rotating blades is surrounded by 133, and a plurality of locking claws 135 formed on the peripheral edge of the fan case 133 are engaged with the locking holes 136 formed in the control circuit board 103. . That is, the fan case 133 and the control circuit board 103 as the outer case of the cooling fan 131 have a shape covering the outer edge.

As shown in FIG. 8, the cooling fan 131 is disposed in the vicinity of the rear plate of the projector housing, the control circuit board 103 is positioned in the vicinity of the upper surface plate 11 of the projector 10, and the suction port 137 is disposed in the vicinity of the lower surface plate 16. Is located. The discharge port 138 is connected to the partition wall 120 in an airtight manner.
When a current flows through the coil of the stator 134, a magnetic field is generated by the coil, and attraction and repulsion occurs with the rotor magnet 140 provided on the fan 132, whereby the fan 132 rotates.

Also, some circuit elements may be attached to the control circuit board 103 also in the internal space of the cooling fan 131, and these circuit elements are efficiently cooled when the cooling fan 131 is driven.
Although not shown in the drawings, in addition to the control circuit board 103 that is attached to the stator 134 and covers one surface of the cooling fan 131, other control that is parallel to the control circuit board 103 that is the main board is provided with a gap. The circuit board 103 may be arranged in the vicinity of the cooling fan 131.

  As shown in FIGS. 3 to 5, the partition wall 120 includes an intake-side space chamber 121 in which relatively low temperature devices such as various optical systems and various substrates are arranged, and a light source device 63. And an exhaust-side space chamber 122 in which a light source unit such as a reflection mirror 72 and a color wheel 71 arranged near the light source device 63 and a light source device 63 are arranged.

  The partition wall 120 is composed of a plate-like first partition wall 123 and a second partition wall 124, and an upper partition plate 126 covers the upper part of the exhaust side space chamber 122 in an airtight manner.

  The first partition wall 123 is a partition wall that guides a part of the exhaust air from the discharge port 138 of the cooling fan 131 to the illumination side block 78 that is disposed in the vicinity of the light source device 63 of the optical system unit 77 and has a high temperature. In this case, the length is obliquely inclined from the discharge port 138 of the cooling fan toward the back plate 15 and is connected to the end of the illumination-side block partition wall 127 in the optical system unit 77. Although not shown, the first partition wall 123 is formed with a vent hole or a slit so that the exhaust air from the discharge port 138 of the cooling fan 131 directly hits the color wheel 71.

  The second partition wall 124 is a partition wall for separating the circuit and various members such as the lamp power circuit block 101 and the front plate 12, and is inclined rightward from the discharge port 138 of the cooling fan 131 toward the front plate 12. The front plate 12 is inclined in any direction, extending from this end to the right side plate 14 in parallel with the front plate 12 toward the right side plate 14, and finally from the end to the right side plate 14 in parallel. It is a substantially bowl-shaped shape connected to. The shape of the second partition 124 is to disperse the hot exhaust gas in the exhaust side space chamber 121 over the entire front plate 12.

  The upper partition plate 126 covers the entire upper portion of the exhaust-side space chamber 122, is formed in substantially the same shape as the upper portion of the exhaust-side space chamber 122, and is disposed between the upper surface plate of the projector housing. It is arranged with a space.

  The first partition wall 123 and the second partition wall 124 are made of a heat insulating member such as a resin similarly to the optical system unit 77. Accordingly, it is possible to prevent high heat generated by the light source device 63 in the exhaust side space chamber 122 from leaking to the intake side space chamber 121.

  Further, as shown in FIG. 4, an exhaust temperature reducing device 114 for reducing the exhaust temperature in the exhaust side space chamber 122 and releasing it to the outside is provided near the front plate in the exhaust side space chamber 122. The exhaust temperature reducing device 114 is a heat conductive member. In this embodiment, the exhaust temperature reducing device 114 is a heat conductive member having a capillary structure on the inner wall and a metal pipe having a vacuum inside sealed with a working fluid such as pure water or perfluorocarbon. These heat pipes and a plurality of fins are used, and are arranged in the vicinity of the front plate 12 in parallel with the front plate 12.

The exhaust temperature reduction device 114 has a shape in which a plurality of fins that are plate-like bodies are arranged in parallel, and a plurality of fins are connected through a long rod-like heat conduction member passing through substantially the center of the fin. That is, the heat conducting member is in a plate shape and is in contact with the plate surface of the plurality of fins.
By attaching the fins to the heat conducting member in this manner, the heat absorbed by the fins can be released to the heat conducting member, and the entire exhaust temperature reducing device can be kept at a uniform temperature.

  Next, the flow of air in the projector 10 will be described. When the cooling fan 131 starts to move, the outside air flows into the projector housing from the air intake hole 18 formed in the side surface of the projector housing due to the intake pressure of the suction port 137.

  Then, as shown in FIG. 8, a part of the outside air sucked from the intake holes 18 provided in the left side plate 15 and the rear plate 13 cools the display element heat radiating plate 53, and the rear plate 13 and the optical system unit 77. The lower surface of the control circuit board 103 that is the main board along the control circuit board 103 and the upper and lower surfaces of the other control circuit boards 103, or the space between the control circuit boards 103. It passes through and is sucked into the suction port 137 of the cooling fan 131. Further, other outside air sucked from the suction hole 18 of the left side plate 15 cools the optical system unit 77.

  In addition, the air flow in the vicinity of the optical system unit 77 is such that a part of the air sucked from the intake hole 18 of the left side plate 15 flows through the space between the optical system unit 77 and the bottom plate 16 and the illumination side block. It flows into the gap 128 between the projection side block 78 and the projection side block 80, and prevents the high temperature heat of the illumination side block 78 from being transmitted to the projection side block 80. The air flowing into the gap 128 flows into the intake side space chamber 121 in the housing through the cutout 129, and is further sucked into the suction port 137 of the cooling fan 131 and exhausted into the exhaust side space chamber 122.

  In addition, part of the outside air sucked into the projector 10 from the intake hole 18 of the right side plate 14 reaches the control circuit board 103 while cooling the power circuit control board 102 through the periphery of the lamp power circuit block 101 and the like. The control circuit board 103 is cooled and sucked into the suction port 137 of the cooling fan 131. The remaining sucked outside air flows along the first partition 121 and is sucked into the suction port 137 of the cooling fan 131.

Therefore, when the fan 132 having the rotating blades of the cooling fan 131 is rotated , the cooling fan 131 sucks in the surrounding air from the suction port 137, and thereby from the numerous intake holes 18 provided in the side plate of the casing of the projector 10. The outside air can be sucked into the projector 10.

  A part of the exhaust of the cooling fan 131 blown into the exhaust side space chamber 122 flows along the color wheel 71, and most of the exhaust flows around the light source device 63 that has become hot. Further, a part of the air flowing around the light source device 63 flows through the periphery of the discharge lamp through the reflector of the light source device 63, and the other part flows in the vicinity of the reflection mirror 72 and the color wheel 71. Each part is cooled together with the light source device 63.

  In this way, the high-temperature air after the light source device 63 and the color wheel 71 are cooled in the exhaust-side space chamber 122 flows into the exhaust temperature reducing device 114, and is cooled and exhaust holes 17 provided in the front plate 12. Is more discharged.

According to the projector 10 of the present embodiment, conventionally, in addition to the control circuit board 103, a cooling fan control circuit board, a fan motor using a stator 134, a rotor, and the like, and a cooling fan driving device having the cooling fan 131 are separately arranged in a housing. However, since a cooling fan control circuit and a stator 134 serving as a cooling fan driving device are mounted on the control circuit board 103, a cooling fan driving device having a cooling fan control circuit board, a fan motor, and a cooling fan 131 stator is provided. Need not be separately arranged in the housing, and the projector can be made thinner accordingly.
Further, by using the control circuit board 103 as a part of the outer case of the cooling fan 131, the projector can be thinned and the cooling efficiency of the control circuit board 103 is increased.

Next, a modified example of the cooling fan of the present invention will be described. This cooling fan 131 is a sirocco fan type blower provided with a suction port 137 and a discharge port 138. As shown in FIG. 9, the control circuit board 103 on which the stator 134 is mounted and the rotor are integrally formed. and one of fan 132, which is configured with two fan case 133 of hollow cylindrical shape with a thin, two stator 134 for rotating the fan 132 provided with a respective rotary blades, top and bottom of the control circuit board 103 Each side has a stator 134.

  This control circuit board 103 includes a cooling fan control circuit, has a stator 134 on each of the upper surface and the lower surface, and is further formed with a locking hole 136 to which the fan case 133 is fixed, as in the previous embodiment. The projector 10 is used as a main board, and a control circuit for the cooling fan 131 is attached to the projector 10 and is a part of the outer case of the cooling fan.

  The fan 132 has a stator cover portion 139 that covers the stator 134 as a center, and has a shaft portion 141 that penetrates a bearing 134a of the stator 134 described later at the center of the stator cover portion 139. A rotor magnet 140 is laid on the peripheral edge of the stator, and rectangular rotary blades are laid on the outer peripheral edge of the stator cover portion 139. Air in the vicinity of the center is sucked by rotation and exhausted from the side surface.

  Also, the fan case 133 attached to the upper and lower surfaces of the control circuit board 103 has an opening on one surface that becomes the lower surface or the upper surface, and has a cutout that forms a suction port 137 in the center of the upper surface plate that faces the opened surface. A part of the cover has a blowout port that becomes the discharge port 138. Further, a plurality of locking claws 135 for fitting with the control circuit board 103 are provided at arbitrary positions on the side cover.

As shown in FIG. 9, the stator 134 includes a bearing 134 a that penetrates the shaft portion 141 of the fan 132 at the center, and is disposed on the upper surface and the bottom surface of the control circuit board 103, respectively.
Furthermore, as shown in FIG. 10, and fitted through the shaft portion 141 of the fan 132 with a rotating blade to a bearing 134a of the stator 134, a fan 132 having a rotary blade to the periphery of the stator 134 so as to cover by the stator cover 139 mounting, enclose the periphery of the fan 132 in the fan case 133, and fitted and fixed shape to the locking hole 136 of the locking claw 135 formed with a plurality of the peripheral edge is formed on the circuit board 103 of fan case 133 It has become.

  Further, as shown in FIG. 11, the control circuit board 103 is disposed substantially at the center between the top plate and the bottom plate of the projector casing. As shown in FIGS. A suction port 137 is located near 11 and near the bottom plate 16. The discharge port 138 is connected to the partition wall 120 in an airtight manner.

  According to this modification, since the cooling fan control circuit and the stator 134 serving as the cooling fan driving device are mounted on the control circuit board 103, the projector can be thinned, and the suction ports 137 are provided on the upper and lower sides, so It is possible to efficiently cool the device located near the top plate 11 and the device located near the bottom plate 12. Further, since the two cooling fans 131 can be provided on the upper surface and the bottom surface of the control circuit board 103, respectively, it is possible to provide the cooling fans 131 having different performances.

  Further, since the control circuit board 103 is part of the case of the cooling fan 131, the cooling efficiency of the control circuit board 103 is also increased.

In this embodiment, the cooling fan 131 is directly attached to the control circuit board 103. However, the present invention is not limited to the control circuit board 103, and can be directly attached to various circuit boards.
Furthermore, the present invention is not limited to the above-described embodiments, and can be freely changed and improved without departing from the gist of the invention.

1 is a perspective view showing an external appearance of a projector according to an embodiment of the invention. FIG. 3 is a diagram illustrating a functional circuit block of the projector according to the embodiment of the invention. FIG. 3 is a top view of the projector according to the embodiment of the present invention with the top plate removed. FIG. 3 is a top view showing the inside of an exhaust side space chamber of the projector according to the embodiment of the invention. FIG. 3 is a partially cutaway top view of the projector according to the embodiment of the invention. The disassembled perspective view of the cooling fan which concerns on the Example of this invention. The perspective view of the cooling fan which concerns on the Example of this invention. 1 is a perspective view from the bottom side of a projector according to an embodiment of the invention. The disassembled perspective view of the cooling fan which concerns on the other Example of this invention. The perspective view of the cooling fan which concerns on the other Example of this invention. The perspective view for the description of attachment of the cooling fan of the projector which concerns on the other Example of this invention. FIG. 10 is a perspective view of a projector according to another embodiment of the invention. The perspective view from the bottom face side of the projector which concerns on the other Example of this invention.

Explanation of symbols

10 Projector 11 Top plate
12 Front plate 13 Back plate
14 Right side plate 15 Left side plate
16 Bottom plate 17 Exhaust hole
18 Air intake hole 19 Lens cover
20 Various terminals
21 I / O connector 22 I / O interface
23 Image converter 24 Display encoder
25 Video RAM 26 Display driver
31 Image compression / decompression unit 32 Memory card
35 Ir receiver 36 Ir processor
37 Key / Indicator section 38 Control section
41 Power supply control circuit 43 Cooling fan drive control circuit
45 Lens motor 47 Audio processor
48 Speaker 51 Display element
53 Display element heat sink 62 Projection side optical system
63 Light source device 64 Discharge lamp
71 Color wheel 72 Reflection mirror
73 Wheel motor 74 Second reflection mirror
75 Light tunnel
77 Optical system unit 78 Illumination side block
79 Image generation block 80 Projection side block
83 Light source side lens group 84 Irradiation mirror
86 Optical system control board 93 Fixed lens group
97 Movable lens group 101 Lamp power circuit block
102 Power supply control circuit board 103 Control circuit board
114 Exhaust temperature reduction device
120 Partition wall 121 Inlet side space
122 Exhaust side space 123 First partition
124 2nd partition wall 126 Upper partition plate
127 Lighting block block 128 Gap
129 Cutout 131 Cooling fan
132 Rotary blade fan 133 Fan case
134 Stator 134a Bearing
135 Claw 136 Catch hole
137 Suction port 138 Discharge port
139 Stator cover 140 Rotor magnet
141 Shaft

Claims (5)

A light source device;
A light source side optical system;
A display element;
A projection-side optical system;
A cooling fan,
With a rectangular housing containing a circuit board,
The cooling fan includes a fan case whose one surface is closed by the circuit board, a stator of a fan motor provided on the circuit board, and a rotor magnet and rotating blades that are rotatable with respect to the stator. And have a fan
A circuit element mounted on the circuit board is disposed in an internal space of the cooling fan ;
The circuit board has the stator on an upper surface and a lower surface,
Projector fan and fan case with the rotor magnet and the rotary blades on the upper and lower surfaces of the circuit board is respectively arranged, the fan, characterized in Van der Rukoto having different respective performance. The circuit board includes a cooling fan control circuit,
The fan case has a hollow and thin cylindrical shape with a side cover that opens at the bottom, and a top plate having a cutout that serves as a suction port on the top, and the opposite surface of the top plate is closed with a circuit board. The projector according to claim 1, further comprising an opening serving as a discharge port at an arbitrary position. The housing has a top plate and a bottom plate,
The circuit board is located at substantially the center between the top plate and the bottom plate of the housing,
The projector according to claim 2 , wherein the suction port of the cooling fan is located in the vicinity of the top plate and the bottom plate of the casing. An intake side space chamber in which the suction port of the cooling fan is located; and an exhaust side space chamber in which the discharge port of the cooling fan is located;
The projector according to claim 2 or claim 3 exhaust side space chamber and the intake side space chamber is characterized by being divided into air-tight by a partition wall. The projector according to claim 4 , wherein an exhaust temperature reducing device that is a heat conducting member and reduces the exhaust temperature and discharges the exhaust temperature to the outside is disposed in the exhaust side space chamber.

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