JP5354288B2 - projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector in which a plurality of light source devices are efficiently cooled. <P>SOLUTION: The projector 10 includes: first and second light source devices (blue light source device 70 and red light source device 120); first and second heat sinks 81 and 130 attached to the first and second light source devices, respectively; and first and second cooling fans 261a and 261b for sending cooling air to the first and second heat sinks 81 and 130, respectively. The first and second cooling fans 261a and 261b take in outside air from different directions and send cooling air to the first and second heat sinks 81 and 130, respectively. A guide member 301 which guides cooling air emitted from each of the first and second heat sinks 81 and 130 so as to flow in the same direction is disposed between the first and second light source devices. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a projector, and more particularly to cooling of a heat source built in a projector.

  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 projector focuses light emitted from a light source on a micromirror display element called a DMD (digital micromirror device) or a liquid crystal plate, and displays a color image on a screen.

  In the past, projectors using a high-intensity discharge lamp as the light source have been the mainstream. However, in recent years, various projectors using light emitting diodes, laser diodes, organic EL, phosphors, etc. as the light source have been developed. There have been many.

  Since these projectors generate a large amount of heat from the light source device and also incorporate a heat source such as a power supply circuit and a display element, a cooling fan or the like is provided to provide a light source device that is a heat source, a power supply circuit, or the like. It has a cooling structure. For example, in Japanese Patent Application Laid-Open No. 2009-86274 (Patent Document 1), a plurality of light emitting elements serving as heat generation sources are cooled by Peltier elements, and the heat radiating surface of each Peltier element and one cooling means are connected by a heat pipe. There have been proposals for connecting projectors. In this way, by connecting a plurality of light sources to the cooling means by means of heat pipes, it is possible to reduce the size of the projector by omitting the provision of a heat sink for each light source.

  Further, in Japanese Patent Application Laid-Open No. 2008-181776 (Patent Document 2), a light emitting element that emits light of each color wavelength band is disposed on a surface opposite to the side where the light emitting element is disposed on the support substrate, and the light emitting element is disposed. There has been a proposal for a projector having a cooling structure including a heat sink having a plurality of fins projecting toward the other side.

JP 2009-86274 A JP 2008-181776 A

  When the projector described in Patent Document 1 is mounted with a plurality of types of light source devices having different heat generation and temperature dependency of light conversion efficiency, each light source device has a cooling structure that uses one cooling means (such as a heat sink). Therefore, it is difficult to cool the projector efficiently and appropriately control the temperature, and there is a problem that the chromaticity balance of the projected image from the projector is lost due to fluctuations in the outside air.

  In addition, since the projector cooling structure described in Patent Document 2 is configured to cool a plurality of light source devices, each light source device is provided with a plurality of types of light source devices. Appropriate cooling can be performed. However, Patent Document 2 does not describe the details of the flow of the cooling air after cooling each light source device, and there is concern about interference between the cooling airs. If the cooling air cannot be exhausted to the outside smoothly, it is not possible to secure a sufficient amount of cooling air from the cooling fan (that is, the performance of the cooling fan cannot be fully demonstrated), and heat is generated efficiently. The source cannot be cooled.

  The present invention has been made in view of such problems of the prior art, prevents interference between cooling air blown to each of a plurality of light source devices, and smoothly exhausts cooling air from the cooling fan. Accordingly, an object of the present invention is to provide a projector capable of efficiently cooling each light source device, causing each light source device to emit light brightly, and projecting a chromaticity balanced image on a screen.

  The projector according to the present invention includes first and second light source devices, a first heat sink attached to the first light source device, a second heat sink attached to the second light source device, and the first heat sink. A first cooling fan that blows cooling air and a second cooling fan that blows cooling air to the second heat sink, and the first cooling fan and the second cooling fan are different. A guide member that takes in outside air from the direction, blows cooling air to each of the first and second heat sinks, and guides the cooling air discharged from each of the first and second heat sinks to flow in the same direction; , Being disposed between the first and second light source devices.

  In addition, the projector includes a substantially rectangular parallelepiped housing that includes a front panel, a rear panel, and left and right side panels, and an upper panel and a lower panel arranged above and below the front, back, and side panels. The guide member is disposed in the vicinity of the center of the casing so as to be substantially parallel to the front panel and the back panel, and one of the first and second light source devices is more than the guide member. The other cooling fan is disposed on the rear panel side, the other is disposed on the front panel side with respect to the guide member, and the first and second cooling fans are respectively provided from intake holes that are openings formed in the rear panel and the front panel. The outside air is taken in and blown to the first and second heat sinks, and the cooling air flowing into the first and second heat sinks from the suction holes of the rear panel and the front panel, respectively. By the guide member, adapted to flow out from one of the side panels of the left and right side panels.

  A partition member that partitions the first heat sink and the first light source device and partitions the second heat sink and the second light source device is substantially orthogonal to the front panel and the back panel. And between the front panel and the back panel.

  The projector further includes a plurality of auxiliary cooling fans that take in outside air from the intake holes of the rear panel and the front panel, and blow cooling air to the light emission sides of the first and second light source devices, respectively. An auxiliary guide member that guides cooling air blown from a plurality of auxiliary cooling fans so as to flow in the direction of either one of the left and right side panels is substantially parallel to the front panel and the rear panel. Further, it is arranged near the center of the housing.

  The projector cools a heat source other than the first and second light source devices by cooling air discharged from each of the first and second heat sinks.

  Furthermore, in the projector according to the invention, the first and second light source devices are a blue light source device that emits light in a blue wavelength band, and a red light source device that emits light in a red wavelength band. A fluorescent light emitting device having a fluorescent wheel in which a phosphor layer that forms a phosphor layer that emits light in the green wavelength band upon receiving light and a diffused transmission region that diffuses and transmits light are arranged in parallel in the circumferential direction; The first and second light source devices, and the light source side optics for condensing the blue and green wavelength band light emitted from the fluorescent light emitting device and the red wavelength band light emitted from the red light source device on a predetermined surface A light source unit comprising a system, a display element, a light guide optical system that guides light from the light source unit to the display element, and a projection side that projects an image emitted from the display element onto a screen With optics It provided the cooling fan, and a projector control means for controlling the light source unit and the display element.

  The blue light source device includes a laser diode that emits blue wavelength band light, and the red light source device includes a light emitting diode that emits red wavelength band light.

  According to the present invention, a projector including a plurality of light source devices having different heat generation and temperature dependency of light conversion efficiency includes a cooling fan that blows cooling air from different directions to heat sinks of the plurality of light source devices. By providing a guide member that guides the cooling air discharged from the heat sink to flow in the same direction, interference between the cooling air blown to each of the plurality of light source devices is prevented, and the cooling air from the cooling fan is smoothly supplied Thus, it is possible to provide a projector capable of efficiently cooling each light source device, causing each light source device to emit light brightly, and projecting a chromaticity balanced image on a screen. Moreover, the lifetime of each light source device can be extended by cooling the light source devices individually. Furthermore, the cooling air discharged from the heat sink of each light source device in the same direction can cool the heat generation sources other than the light source device, thereby maintaining the performance of the projector over a long period of time.

1 is an external perspective view showing a projector according to an embodiment of the invention. It is a figure which shows the functional circuit block of the projector which concerns on the Example of this invention. 1 is a schematic plan view showing an internal structure of a projector according to an embodiment of the invention. FIG. 3 is a schematic plan view showing the cooling structure of the projector and the flow of cooling air according to the embodiment of the present invention.

  Hereinafter, modes for carrying out the present invention will be described. The projector 10 includes a light source unit 60, a display element 51, a light guide optical system 170 that guides light from the light source unit 60 to the display element 51, and a projection side that projects an image emitted from the display element 51 onto a screen. An optical system 220 and projector control means for controlling the cooling fans 261a, 261b, 262a, 262b, the light source unit 60, and the display element 51 are provided.

  The light source unit 60 includes two light source devices having different heat generation and temperature dependency of light conversion efficiency, a fluorescent light emitting device 100 having a fluorescent wheel 101 whose rotation is controlled, and a light source side optical system 140. Composed. The two light source devices are a blue light source device 70 that is a first light source device that emits light in a blue wavelength band, and a red light source device 120 that is a second light source device that emits light in a red wavelength band. It is. The blue light source device 70 irradiates the fluorescent wheel 101 of the fluorescent light emitting device 100 with light in the blue wavelength band. The blue light source device 70 is formed by arranging blue light sources 71, which are blue laser diodes that emit laser light in a blue wavelength band, in a matrix. The red light source device 120 includes a red light source 121 that is a light emitting diode that emits light in the red wavelength band.

  The fluorescent light emitting device 100 includes a fluorescent wheel 101 and a wheel motor 110 that rotates the fluorescent wheel 101. The fluorescent wheel 101 includes a fluorescent light emitting region in which a phosphor layer that receives light in the blue wavelength band and emits light in the green wavelength band is formed, and a diffuse transmission region that diffuses and transmits light in the circumferential direction. Are arranged side by side. Then, when the blue wavelength band light from the blue light source device 70 is irradiated to the fluorescent light emitting region, the green wavelength band light is emitted from the green phosphor layer that has absorbed the blue light as the excitation light. When blue light with high directivity is irradiated from the blue light source device 70 to the diffuse transmission region, the blue light is converted into light with low directivity when passing through the diffuse transmission region. That is, when blue laser light with high directivity from the blue light source device 70 is applied to the rotating fluorescent wheel 101, blue light and green light with low directivity are emitted from the fluorescent wheel 101.

  The light source side optical system 140 includes a dichroic mirror that is disposed between the blue light source device 70 and the fluorescent wheel 101, transmits blue excitation light, and reflects fluorescent light from the fluorescent material in the fluorescent wheel 101. Further, the light source side optical system 140 includes the blue wavelength band light diffused and transmitted through the diffuse transmission region of the fluorescent wheel 101, the green wavelength band light reflected by the dichroic mirror, and the red wavelength emitted from the red light source 121 of the red light source device 120. A plurality of reflecting mirrors and dichroic mirrors for condensing the band light to the entrance of the light tunnel 175, which is a predetermined surface, and a condensing lens.

  Then, the light source control means in the projector control means individually controls the light emission of the blue light source device 70 and the red light source device 120, and rotates the fluorescent wheel 101 by the wheel motor 110, so that the red, green sequentially from the light source unit 60. Blue wavelength band light can be emitted. Therefore, the DMD that is the display element 51 of the projector 10 displays the light of each color in a time-sharing manner according to the data, so that a color image can be generated on the screen.

  The housing of the projector 10 has a substantially rectangular parallelepiped shape, and is disposed so as to be orthogonal to the front panel 12 and the rear panel 13 that are disposed so as to face each other. The right side panel 14 and the left side panel 15, and the top panel 11 and the bottom panel arranged above and below the front, back, and left and right side panels are configured.

  A guide member 301 is disposed near the center of the housing so as to be substantially parallel to the front panel 12 and the back panel 13. The blue light source device 70 is disposed on the back panel 13 side with respect to the guide member 301, and the red light source device 120 is disposed on the front panel 12 side with respect to the guide member 301.

  A partition member 305 that partitions the first heat sink 81 and the blue light source device 70 attached to the blue light source device 70 and partitions the second heat sink 130 and the red light source device 120 attached to the red light source device 120 includes a front panel. It is disposed between the front panel 12 and the back panel 13 so as to be substantially orthogonal to the 12 and the back panel 13.

  A first heat sink 81 is attached to the right side panel 14 side of the blue light source device 70, and two first cooling fans 261 a are disposed between the first heat sink 81 and the back panel 13. The first cooling fan 261a sends outside air to the first heat sink 81 as cooling air. Therefore, the cooling air blown into the first heat sink 81 along the partition member 305 is changed in direction by 90 degrees by the guide member 301 and discharged to the right side panel 14 side.

  A second heat sink 130 is attached to the right side panel 14 side of the red light source device 120, and a second cooling fan 261b is disposed between the second heat sink 130 and the front panel 12. The second cooling fan 261b sends outside air to the second heat sink 130 as cooling air. Therefore, the cooling air blown into the second heat sink 130 along the partition member 305 is changed in direction by 90 degrees by the guide member 301 and discharged to the right side panel 14 side.

  As described above, the projector 10 is arranged on the guide member 301 side with respect to the first cooling fan 261a by taking outside air from the intake hole 18 in which the first cooling fan 261a is an opening formed in the rear panel 13. The blue light source device 70 is cooled by blowing outside air as cooling air to the first heat sink 81. Further, in the projector 10, the second cooling fan 261b takes in outside air from the intake hole 18 which is an opening formed in the front panel 12, and is disposed on the guide member 301 side with respect to the second cooling fan 261b. The red light source device 120 is cooled by blowing outside air as cooling air to the two heat sinks 130.

  Then, by incorporating the cooling structure as described above into the projector 10, the air flows into the first and second heat sinks 81 and 130 attached to the blue and red light source devices 70 and 120 from the intake holes 18 of the rear panel 13 and the front panel 12, respectively. The cooling air is changed in direction by the guide member 301 and flows to the right side panel 14 side which is the side in the same direction.

  Further, the cooling air discharged from each of the first and second heat sinks 81 and 130 further cools the control circuit board 241 and the like disposed between the right side panel 14 and the blue and red light source devices 70 and 120, The air is exhausted from an exhaust hole 17 which is an opening formed in the right side panel 14.

  Thus, since the first cooling fan 261a and the second cooling fan 261b take in outside air from different directions before and after the projector 10, the intake air flow taken in by the first cooling fan 261a and the second cooling fan There is no interference with the intake air flow taken in by the fan 261b. Further, a guide member for guiding the cooling air discharged by cooling the first and second heat sinks 81 and 130 attached to the first and second light source devices (blue and red light source devices 70 and 120) to flow in the same direction. Since 301 is disposed between the blue light source device 70 and the red light source device 120, interference between cooling air emitted from the first and second heat sinks 81 and 130 can also be prevented. Therefore, since the projector 10 can smoothly suck and exhaust the cooling air, the blue and red light source devices 70 and 120 can be efficiently cooled.

  Accordingly, it is possible to provide the projector 10 that can cause the blue and red light source devices 70 and 120 to emit light brightly and project an image with a balanced chromaticity on the screen. In addition, by separately cooling the blue and red light source devices 70 and 120, the lifetime of the blue and red light source devices 70 and 120 can be extended. Furthermore, since the heat sources other than the blue and red light source devices 70 and 120 such as the control circuit board 241 can be cooled by the cooling air discharged from the first and second heat sinks 81 and 130 in the same direction, the projector 10 is simple. In addition, the performance of the projector 10 can be maintained for a long time.

  In addition, outside air is taken into the projector 10 from the intake holes 18 of the rear panel 13 and the front panel 12, and cooling air is blown to the light emitting sides of the first and second light source devices (blue and red light source devices 70, 120). First and second auxiliary cooling fans 262a and 262b are disposed in the vicinity of the rear panel 13 and the front panel 12, respectively.

  Since the projector 10 has an intake passage formed between the rear panel 13 and the rear end surface of the image generation block 165, the intake passage is caused by the cooling air sucked by the first auxiliary cooling fan 262a. It is possible to cool the third heat sink 190 for the display element 51 disposed in the space. In addition, the projector 10 can cool the blue light source device 70 and the like by the cooling air blown from the first auxiliary cooling fan 262a. The projector 10 can cool the fluorescent light emitting device 100 and the like by the cooling air sucked from the front panel 12 side by the second auxiliary cooling fan 262b.

  Further, the auxiliary guide member 303 for guiding the cooling air blown from the first and second auxiliary cooling fans 262a and 262b to flow to the left side panel 15 side which is the side in the same direction is provided on the front panel 12 and It is arranged near the center of the housing so as to be substantially parallel to the back panel 13.

  As a result, the cooling air blown from the first and second auxiliary cooling fans 262a and 262b is directly blown to the blue and red light source devices 70 and 120 to cool the blue and red light source devices 70 and 120, as well as blue and red Optical components and circuit boards arranged on the light emitting side of the light source devices 70 and 120 are cooled and exhausted to the outside through the exhaust holes 17 that are openings formed in the left side panel 15. That is, the cooling air blown from the first and second auxiliary cooling fans 262a and 262b to the center side of the casing along the partition member 305 cools the blue and red light source devices 70 and 120, and then is cooled by the auxiliary guide member 303. The light source side optical system 140 arranged between the left side panel 15 and the blue and red light source devices 70 and 120 is further converted and flows toward the left side panel 15 which is the side in the same direction. In addition, the optical components and the main control board in the optical system unit 160 are cooled and exhausted from the exhaust hole 17 of the left side panel 15.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an external perspective view of the projector 10. In this embodiment, left and right in the projector 10 indicate the left and right direction with respect to the projection direction, and front and rear indicate the screen side direction of the projector 10 and the front and rear direction with respect to the traveling direction of the light beam.

  As shown in FIG. 1, the projector 10 has a substantially rectangular parallelepiped housing. The housing includes a front panel 12 and a rear panel that are arranged to face each other, a right side panel and a left side panel 15 that are arranged to be orthogonal to the front panel 12 and the rear panel, and the front panel. The upper panel 11 and the lower panel are arranged above and below the back and left and right side panels.

  The projector 10 has a lens cover 19 that covers the projection port on the side of the front panel 12 that is a side plate in front of the housing, and the front panel 12 is provided with a plurality of intake holes 18 as openings. . Further, although not shown, an Ir receiver for receiving a control signal from the remote controller is provided.

  In addition, a key / indicator unit 37 is provided on the top panel 11 of the housing. The key / indicator unit 37 switches a power switch key, a power indicator for notifying power on / off, and switching on / off of projection. Keys and indicators such as an overheat indicator for notifying when a projection switch key, a light source unit, a display element, a control circuit, etc. are overheated are arranged.

  In addition, on the rear surface of the housing, there are provided various terminals 20 such as an input / output connector section and a power adapter plug that provide a USB terminal, a D-SUB terminal for image signal input, an S terminal, an RCA terminal, etc. on the rear panel. Yes. In addition, a plurality of intake holes 18 serving as openings are formed in the rear panel. Note that a plurality of exhaust holes 17 are formed as openings in the right side panel, which is a side plate of the casing (not shown), and the left side panel 15, which is the side plate shown in FIG. An intake hole 18 is also formed at a corner of the left side panel 15 near the back panel. Further, a plurality of openings serving as intake holes or exhaust holes are also formed in the vicinity of the front, back, and left and right side panels on a lower panel (not shown).

  Next, projector control means of the projector 10 will be described with reference to the block diagram of FIG. The projector control means 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. Image signals of various standards input from the input / output connector unit 21 are input / output. The image conversion unit 23 converts the image signal into a predetermined format suitable for display via the interface 22 and the system bus (SB), and outputs the image signal to the display encoder 24.

  The display encoder 24 develops and stores the input 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.

  The display drive unit 26 functions as display element control means, and drives the display element 51, which is a spatial light modulation element (SOM), at an appropriate frame rate corresponding to the image signal output from the display encoder 24. The light beam emitted from the light source unit 60 is irradiated onto the display element 51 through the light guide optical system, thereby forming an optical image with the reflected light of the display element 51, and a projection side optical system to be described later The image is projected and displayed on a screen (not shown). The movable lens group 235 of the projection side optical system is driven by the lens motor 45 for zoom adjustment and focus adjustment.

  The image compression / decompression unit 31 performs a recording process in which the luminance signal and the color difference signal of the image signal are data-compressed by a process such as ADCT and Huffman coding, and sequentially written in a memory card 32 that is a detachable recording medium. Further, the image compression / decompression unit 31 reads the image data recorded on the memory card 32 in the reproduction mode, decompresses individual image data constituting a series of moving images in units of one frame, and converts the image data into the image conversion unit 23. Is output to the display encoder 24 and the processing for enabling the display of a moving image or the like based on the image data stored in the memory card 32 is performed.

  The control unit 38 controls 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. .

  An operation signal of a key / indicator unit 37 composed of a main key and an indicator provided on the top panel 11 of the housing is directly sent to the control unit 38, and a key operation signal from the remote controller is sent to the Ir receiving unit 35. , And the code signal demodulated by the Ir processor 36 is output to the controller 38.

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

  Further, the control unit 38 controls a light source control circuit 41 as a light source control unit, and the light source control circuit 41 is configured so that light source light of a predetermined wavelength band required at the time of image generation is emitted from the light source unit 60. In addition, the light emission of the blue light source device and the red light source device of the light source unit 60 is individually controlled, and the wheel motor is controlled to rotate the fluorescent wheel of the fluorescent light emitting device.

  Further, the control unit 38 causes the cooling fan drive control circuit 43 to perform temperature detection using a plurality of temperature sensors provided in the light source unit 60 and the like, and individually controls the rotation speeds of the plurality of cooling fans from the result of the temperature detection. Let Further, the control unit 38 causes the cooling fan drive control circuit 43 to keep the cooling fan rotating even after the projector body is turned off by a timer or the like, or to turn off the projector body depending on the result of temperature detection by the temperature sensor. Control is also performed.

  Next, the internal structure of the projector 10 will be described. FIG. 3 is a schematic plan view showing the internal structure of the projector 10. As shown in FIG. 3, the projector 10 includes a control circuit board 241 in the vicinity of the right side panel 14. The control circuit board 241 includes a power supply circuit block, a light source control block, and the like that generate a particularly large amount of heat. In addition, the projector 10 includes a light source unit 60 on the side of the control circuit board 241, that is, at a substantially central portion of the housing. Further, the projector 10 includes an optical system unit 160 between the light source unit 60 and the left side panel 15. A main control board, which is a heat source including a CPU (not shown), is disposed above the light source unit 60 and the optical system unit 160.

  The light source unit 60 includes a blue light source device 70 disposed in the vicinity of the rear panel 13 at a substantially central portion in the left-right direction of the housing, and a front surface on the optical axis of a light beam emitted from the blue light source device 70. Fluorescent light emitting device 100 disposed in the vicinity of panel 12, red light source device 120 disposed between blue light source device 70 and fluorescent light emitting device 100, and blue and green wavelength band light emitted from fluorescent light emitting device 100 Or a light source side optical system that condenses each color light at the entrance of the light tunnel 175, which is a predetermined surface, by converting the red wavelength band light emitted from the red light source device 120 to have the same optical axis. 140.

  The blue light source device 70 irradiates the fluorescent wheel 101 of the fluorescent light emitting device 100 with light in the blue wavelength band. The blue light source device 70 includes a plurality of blue light sources 71 arranged so that their optical axes are parallel to the back panel 13, and a reflection mirror that converts the optical axis of light emitted from the blue light sources 71 by 90 degrees in the direction of the front panel 12. A group 75 and a condenser lens 78 that condenses the light emitted from the blue light source 71 reflected by the reflecting mirror group 75.

  The blue light source 71 is a blue laser diode that emits laser light in a blue wavelength band, and the blue light source device 70 includes a plurality of blue light sources 71 arranged in a matrix. In the blue light source device 70, collimator lenses 73 for converting the light emitted from each blue laser diode into parallel light are arranged on the optical axis of each blue laser diode. The reflection mirror group 75 includes a plurality of reflection mirrors arranged in a stepped manner, and reduces the cross-sectional area of the light beam emitted from the blue light source 71 in one direction and emits the light to the condenser lens 78.

  Fluorescent light emitting device 100 is arranged to be parallel to front panel 12, that is, fluorescent wheel 101 arranged so as to be orthogonal to the optical axis of light emitted from blue light source device 70, and rotationally drives this fluorescent wheel 101 A wheel motor 110, a condensing lens group 111 that condenses the light bundle emitted from the fluorescent wheel 101 toward the rear panel 13, and a light condensing that collects the light bundle emitted from the fluorescent wheel 101 toward the front panel 12. A lens 115.

  The fluorescent wheel 101 includes a fluorescent light emitting region in which a layer of a green phosphor that emits fluorescent light in the green wavelength band using the blue light emitted from the blue light source device 70 as excitation light, and the blue light emitted from the blue light source device 70. And a diffuse transmission region that diffuses and transmits light in parallel with each other in the circumferential direction. Further, the surface of the fluorescent wheel 101 on the back panel 13 side of the fluorescent light emitting region is mirrored by silver vapor deposition or the like, and a phosphor layer is laid on the mirrored surface. Further, fine irregularities are formed on the surface of the fluorescent wheel 101 in the diffuse transmission region by sandblasting or the like.

  The emitted light from the blue light source device 70 irradiated on the fluorescent light emitting region of the fluorescent wheel 101 excites the fluorescent material in the fluorescent material layer, and the light flux in the green wavelength band emitted fluorescently from this fluorescent material in all directions. Is reflected directly to the rear panel 13 side or after being reflected by the surface of the fluorescent wheel 101 and then emitted to the rear panel 13 side and enters the condenser lens group 111. In addition, the highly directional blue laser light from the blue light source device 70 irradiated to the diffuse transmission region of the fluorescent wheel 101 is diffused by the fine unevenness and condensed as diffuse transmitted light converted into light having low directivity. The light enters the lens 115. That is, when blue laser light with high directivity from the blue light source device 70 is applied to the rotating fluorescent wheel 101, blue light and green light with low directivity are emitted from the fluorescent wheel 101.

  The red light source device 120 includes a red light source 121 arranged so that the optical axis is parallel to the blue light source 71, and a condensing lens group 125 that condenses the light emitted from the red light source 121. The red light source device 120 is arranged so that the light axis from the blue light source device 70 and the green wavelength band light emitted from the fluorescent wheel 101 intersect the optical axis. The red light source 121 is a red light emitting diode that emits light in the red wavelength band.

  The light source side optical system 140 includes a condenser lens that condenses the light bundles in the red, green, and blue wavelength bands, and a reflection mirror that converts the optical axes of the light bundles in the respective color wavelength bands into the same optical axis, It consists of a dichroic mirror. Specifically, at the position where the blue wavelength band light emitted from the blue light source device 70 and the green wavelength band light emitted from the fluorescent wheel 101 and the red wavelength band light emitted from the red light source device 120 intersect, A first dichroic mirror 141 that transmits blue and red wavelength band light, reflects green wavelength band light, and converts the optical axis of the green light by 90 degrees in the direction of the left side panel 15 is disposed.

  Also, on the optical axis of the blue wavelength band light diffusely transmitted through the fluorescent wheel 101, that is, between the condenser lens 115 and the front panel 12, the blue wavelength band light is reflected and the optical axis of this blue light is on the left side. A first reflecting mirror 143 that converts 90 degrees in the direction of the surface panel 15 is disposed. Further, on the optical axis of the blue wavelength band light reflected by the first reflection mirror 143 and in the vicinity of the optical system unit 160, a second reflection mirror for converting the optical axis of the blue light by 90 degrees in the direction of the back panel 13 145 is arranged.

  Then, the optical axis of the red wavelength band light transmitted through the first dichroic mirror 141, the optical axis of the green wavelength band light reflected by the first dichroic mirror 141 so as to coincide with this optical axis, and the second reflection mirror 145 At the position where the optical axis of the reflected blue wavelength band light intersects, the blue wavelength band light is transmitted, the red and green wavelength band light is reflected, and the optical axes of the red and green light are 90 degrees toward the rear panel 13. A second dichroic mirror 148 for changing the degree is arranged. A condensing lens is disposed between the dichroic mirror and the reflecting mirror.

  By configuring the light source side optical system 140 in this way, when the fluorescent wheel 101 is rotated and light is emitted from the blue light source device 70 and the red light source device 120 at different timings, red, green, and blue wavelength band lights are emitted from the light source. By sequentially entering the light tunnel 175 via the side optical system 140 and the DMD that is the display element 51 of the projector 10 displaying each color light in a time-sharing manner according to the data, a color image can be generated on the screen. .

  The optical system unit 160 includes an illumination side block 161 located on the left side of the blue light source device 70, an image generation block 165 located near the position where the back panel 13 and the left side panel 15 intersect, and a light source side optical system. The projection side block 168 located between the left side panel 15 and the projection side block 168 is configured in a substantially U shape and has a case for accommodating optical components such as lenses and mirrors.

  The illumination side block 161 includes a part of a light guide optical system 170 that guides the light source light emitted from the light source unit 60 to the display element 51 provided in the image generation block 165. The light guide optical system 170 included in the illumination-side block 161 includes a light tunnel 175 that uses a light beam emitted from the light source unit 60 as a light beam having a uniform intensity distribution, and collects light source light on an incident surface of the light tunnel 175. A condensing lens 173 that emits light, a condensing lens 178 that condenses the light emitted from the light tunnel 175, and an optical axis conversion mirror 181 that converts the optical axis of the light bundle emitted from the light tunnel 175 in the direction of the image generation block 165. Etc.

  As the light guide optical system 170, the image generation block 165 has a condensing lens 183 that condenses the light source light reflected by the optical axis conversion mirror 181 on the display element 51, and a light beam transmitted through the condensing lens 183 as a display element. And an irradiation mirror 185 that irradiates 51 at a predetermined angle. Further, the image generation block 165 includes a DMD serving as the display element 51, and a condensing lens 195 as the projection-side optical system 220 is disposed in the vicinity of the front surface of the display element 51.

  The projection-side block 168 has a lens group of the projection-side optical system 220 that emits ON light reflected by the display element 51 to the screen. The projection-side optical system 220 includes a fixed lens group 225 built in a fixed lens barrel and a movable lens group 235 built in a movable lens barrel, and is a variable focus lens having a zoom function, and is movable by a lens motor. Zoom adjustment and focus adjustment can be performed by moving the lens group 235.

  As the heat generation source of the projector 10, there are a blue light source device 70, a red light source device 120, a control circuit board 241 having a power supply circuit, a main control board having a CPU, a display element 51, and the like. The projector 10 is also equipped with various optical components such as lenses and mirrors that rise in temperature when receiving light from the blue and red light source devices 70 and 120.

  Here, the projector 10 is equipped with two light source devices, one of which is a blue light source device 70 which is a first light source device formed by arranging blue laser diodes in a matrix, and the other light emitting a red light emitting diode. This is a red light source device 120 that is a second light source device that is a body. For this reason, these two light source devices have different characteristics such as the amount of heat generated by the light emitters (blue light source 71 and red light source 121) and the temperature dependence of the light conversion efficiency, as well as the maximum junction temperature, applied voltage, Use conditions such as output are different, that is, different types of light source devices.

  Therefore, this projector 10 does not cool the two types of light source devices in the same way, but it is necessary to make each light source device emit light brightly by providing a cooling structure suitable for each. In addition, the projector 10 needs to cool other heat sources other than the light source device and various optical components that increase in temperature.

  Hereinafter, two types of light source devices, a structure for cooling a heat source other than the light source device and various optical components, and a flow of cooling air will be described with reference to FIG. First, the cooling structure will be described. This projector 10 is a guide that divides the interior of the casing in the front-rear direction in the vicinity of the center in the front-rear direction of the casing formed into a hollow, substantially rectangular parallelepiped shape by the front, back, side (right side, left side), top, and bottom panels. A member 301 and an auxiliary guide member 303 are arranged, and a partition member 305 that divides the inside of the housing into left and right is arranged in the vicinity of the center in the left-right direction of the housing.

  In the blue light source device 70 as the first light source device, a plurality of blue light sources 71, a collimator lens 73, and a reflection mirror group 75 are fixed at predetermined positions by a hollow trapezoidal columnar holder 79. Further, a first heat sink 81 is attached to the right side panel 14 side of the blue light source device 70, and two first cooling fans 261 a are disposed between the first heat sink 81 and the back panel 13. The first heat sink 81 and second and third heat sinks 130 and 190, which will be described later, are formed by arranging a plurality of heat radiating fins in a vertical direction in a plate-like base so as to be parallel to the upper and lower panels, respectively.

  Since the first cooling fan 261a is attached in the immediate vicinity of the back panel 13, it can blow outside air to the first heat sink 81 as cooling air. The member that holds the blue light source 71 and the collimator lens 73 is thermally connected to the base of the first heat sink 81 so that the heat from the blue light source 71 is transmitted to the radiation fins of the first heat sink 81.

  Further, between the blue light source device 70 and the rear panel 13, a first auxiliary cooling fan 262a that blows cooling air to the light emitting side of the blue light source device 70 is disposed, and the hollow trapezoidal column shape of the blue light source device 70 The cooling air can be directly blown onto the holder 79 of the machine.

  The red light source device 120 that is the second light source device includes a red light source 121 that is a heat source, a heat diffusion plate made of copper, aluminum, or the like having high thermal conductivity, a Peltier element, and a right side panel of the red light source device 120. A holding member is provided to sandwich the red light source 121 and the like with the base of the second heat sink 130 so that the base of the second heat sink 130 disposed on the 14 side is fixed in a thermally connected state. That is, the second heat sink 130 is attached to the right side panel 14 side of the red light source device 120 so that the Peltier element is in contact with the base of the second heat sink 130. A second cooling fan 261b is disposed between the second heat sink 130 and the front panel 12. Since the second cooling fan 261b is attached in the immediate vicinity of the front panel 12, it can blow outside air to the second heat sink 130 as cooling air.

  Here, the Peltier element is a plate-like thermoelectric element that utilizes the Peltier effect that heat is transferred from one metal to the other when an electric current is passed through a joint between two kinds of metals. Therefore, by disposing the heat diffusion plate on the heat absorption surface side of the Peltier element and disposing the base of the second heat sink 130 on the heat dissipation surface side, the heat from the red light source 121 is diffused to the heat diffusion plate, and thereafter It is transferred to the second heat sink 130 via the element. The heat transferred to the second heat sink 130 is efficiently radiated from the plurality of radiation fins by the cooling air blown to the second heat sink 130.

  The blue light source device 70 having a plurality of blue laser diodes has a larger output and a larger total heat generation than the red light source device 120 having a red light emitting diode, and therefore has an effective cooling area larger than that of the second heat sink 130. The first heat sink 81 is employed, and two first cooling fans 261a are also provided. Thus, by providing the cooling structures suitable for the use conditions of the blue light source device 70 and the red light source device 120, it is possible to efficiently cool each light source device and emit bright light. Further, as described above, the control unit 38 is configured to cause the cooling fan drive control circuit 43 to control the first and second cooling fans 261a and 261b individually, so that it depends on the operating conditions and environmental conditions. Cooling according to the characteristics of each light source device can be performed, and a color balanced image can always be projected on the screen.

  Since the fluorescent light emitting device 100 receives the high-power laser light emitted from the blue light source device 70, the temperature of the phosphor layer in the fluorescent light emitting region and the temperature of the diffuse transmission region increase. The wheel motor 110 is also a heat source. Therefore, in order to cool them, the second auxiliary cooling fan 262b that blows cooling air to the light emission side of the red light source device 120 between the wheel motor 110 and the front panel 12 in the immediate vicinity of the front panel 12. Is placed. Accordingly, the second auxiliary cooling fan 262b can spray outside air as cooling air on the fluorescent wheel 101 or the wheel motor 110 to directly cool the fluorescent wheel 101 or the like. Further, since the second auxiliary cooling fan 262b can directly blow cooling air on the holding member of the red light source 121 in the red light source device 120, the red light source device 120 can also be cooled.

  The partition member 305 is substantially the same as the front panel 12 and the rear panel 13 in the vicinity of the center in the left-right direction of the housing so that a substantially rectangular space is formed on each of the right side panel 14 side and the left side panel 15 side. It arrange | positions between the front panel 12 and the back panel 13 so that it may orthogonally cross. The partition member 305 is disposed so as to partition the blue light source device 70 and the first heat sink 81 attached to the blue light source device 70. Further, the partition member 305 is disposed so as to partition the red light source device 120 and the second heat sink 130 attached to the red light source device 120.

  Here, the partition member 305 is a member for partitioning that is attached to various optical components and a housing, and is a part of the various optical components. Represents a conceptual line that divides That is, the thick line in the figure does not represent the partition member 305 itself. Actually, for example, the left side plate of the left first cooling fan 261a that cools the first heat sink 81 is provided on the housing. It functions as a partition member 305 in the vicinity of the back surface. The base of the first heat sink 81 functions as a partition member 305 that partitions the blue light source device 70 and the first heat sink 81.

  Further, the base of the second heat sink 130 functions as a partition member 305 that partitions the red light source device 120 and the second heat sink 130. Further, the left side plate of the second cooling fan 261b and the right side plate of the second auxiliary cooling fan 262b function as a partition member 305 in the vicinity of the front panel.

  The partition member 305 is disposed in the front-rear direction between the front panel 12 and the back panel 13, but it is not necessary to completely connect the members functioning as the partition members 305, and the partition member Of course, it is not necessary to extend 305 to the upper surface panel or the lower surface panel and make it contact.

  The guide member 301 is located between the first heat sink 81 and the second heat sink 130 attached to each of the blue light source device 70 and the red light source device 120 disposed near the center in the front-rear direction of the housing. In addition, it is arranged so as to be substantially parallel to the back panel 13. That is, the blue light source device 70 and the first heat sink 81 are disposed on the back panel 13 side with respect to the guide member 301, and the red light source device 120 and the second heat sink 130 are disposed on the back panel 13 side with respect to the guide member 301. .

  The guide member 301 is a plate-like member that comes into contact with the upper surface panel and the lower surface panel, and extends to the partition member 305 so as to block the side of the first heat sink 81 on the front panel 12 side and The side of the rear panel 13 side of the heat sink 130 is closed. Thereby, the cooling air blown into the first and second heat sinks 81 and 130 along the partition member 305 is changed in direction by 90 degrees by the guide member 301 and discharged to the right side panel 14 side.

  The auxiliary guide member 303 is disposed so as to be substantially parallel to the front panel 12 and the back panel 13 between the blue light source device 70 and the red light source device 120 which are near the center in the front-rear direction of the housing. That is, the blue light source device 70 is disposed closer to the back panel 13 than the auxiliary guide member 303, and the red light source device 120 is disposed closer to the back panel 13 than the auxiliary guide member 303.

  The auxiliary guide member 303 is a plate-like member that is an end portion of the holder 79 of the blue light source device 70 on the front panel 12 side and projects in the direction of the upper surface and the lower surface panel. As a result, the cooling air blown along the partition member 305 from the first and second auxiliary cooling fans 262a and 262b is changed in direction by 90 degrees and flows to the left side panel 15 side.

  As described above, since the projector 10 has the partition member 305, the guide member 301, and the auxiliary guide member 303 arranged in a substantially cross shape in a plan view, the cooling blown from the first and second cooling fans 261a, 261b. The wind can be exhausted from the exhaust hole 17 of the right side panel 14 by changing the direction to the right side panel 14 side which is the side in the same direction. Similarly, the projector 10 changes the direction of the cooling air blown from the first and second auxiliary cooling fans 262a, 262b to the left side panel 15 side that is the side in the same direction, and thereby the left side panel 15 The exhaust holes 17 can be exhausted.

  Next, the flow of cooling air will be described. As shown in the figure, the first cooling fan 261a takes outside air from the intake hole 18 of the back panel 13 and blows cooling air to the first heat sink 81. The cooling air blown into the first heat sink 81 (the gap between the plurality of heat dissipating fins arranged in parallel in the vertical direction) flows toward the center of the casing along the partition member 305 and is 90 degrees by the guide member 301. The direction is changed and emitted to the right side panel 14 side. The cooling air discharged from the first heat sink 81 cools the control circuit board 241 and the like, and is then exhausted from the exhaust hole 17 of the right side panel 14.

  The second cooling fan 261b takes outside air from the intake hole 18 of the front panel 12 and blows cooling air to the second heat sink 130. The cooling air blown into the second heat sink 130 (the gap between the plurality of heat dissipating fins arranged side by side in the vertical direction) flows toward the center of the casing along the partition member 305 and is 90 degrees by the guide member 301. The direction is changed and emitted to the right side panel 14 side. The cooling air discharged from the second heat sink 130 cools the control circuit board 241 and the like and is then exhausted from the exhaust hole 17 of the right side panel 14.

  The first auxiliary cooling fan 262a sucks outside air from the intake holes 18 of the back panel 13 and the intake holes 18 formed in the left side panel 15 in the vicinity of the back panel 13. Here, in the projector 10, an auxiliary partition member 304 that is substantially parallel to the rear panel 13 is disposed between the first auxiliary cooling fan 262a and the left side panel 15, so that the rear panel 13 and the image generation block 165 An intake passage is formed between the rear end surface. Thus, the air flowing in from the intake holes 18 of the rear panel 13 and the left side panel 15 is blown to the third heat sink 190 that is disposed in the intake flow path and thermally connected to the display element 51. Will be cooled.

  Then, the cooling air from the first auxiliary cooling fan 262a is directly blown onto the holder 79 of the blue light source device 70 to cool the blue light source device 70 via the holder 79. Further, since the blue light source device 70 is sprayed on the trapezoidal columnar holder 79 that holds the blue light source 71, the collimator lens 73, and the reflection mirror group 75, the blue light source device 70 was sprayed on the side plate on the rear panel 13 side of the holder 79. The cooling air changes its direction upward and is blown to the upper panel side, and then flows through the gap between the upper panel and the top plate of the holder 79. Then, the cooling air flows along the partition member 305 toward the center of the casing, is changed in direction by 90 degrees by the auxiliary guide member 303, and flows to the left side panel 15 side.

  In addition, the cooling air whose direction is changed by the side plate on the left side panel 15 side of the holder 79 of the blue light source device 70 is mostly optical system unit 160 arranged between the blue light source device 70 and the left side panel 15. After the direction is changed upward by the side plate of the optical system unit case 169 that accommodates the lens and mirror group, the exhaust hole 17 of the left side panel 15 passes through the gap between the top panel and the top plate of the optical system unit case 169. Exhausted from.

  The second auxiliary cooling fan 262b takes in outside air from the intake hole 18 of the front panel 12. Then, the cooling air from the second auxiliary cooling fan 262b is directly blown onto the fluorescent wheel 101, the wheel motor 110 and the holding member of the red light source device 120 of the fluorescent light emitting device 100, and the red light source device 120 and the fluorescent light emitting device 100. Cool down. Further, the light source side optical system 140 is held and accommodated in a space closed by the case 149 in the same manner as the optical system unit 160. Therefore, the cooling air that has cooled the fluorescent light emitting device 100 and the red light source device 120 is changed in direction by 90 degrees by the auxiliary guide member 303 and is upward by the side plate on the center side of the projector 10 of the case 149 of the light source side optical system 140. After the direction is changed, the direction is further changed to the left side panel 15 side by the top panel, and flows through the gap between the top panel and the top plate of the case 149 of the light source side optical system 140.

  Thereby, the lens, mirror, etc. of the light source side optical system 140 are indirectly cooled. The cooling air flowing through the gap between the top panel and the top plate of the case 149 of the light source side optical system 140 flows into the gap between the top panel and the top plate of the optical system unit case 169, and the lens in the optical system unit 160 Are indirectly cooled and then exhausted from the exhaust hole 17 of the left side panel 15.

  The cooling air blown from the first and second auxiliary cooling fans 262a and 262b includes the holder 79 of the blue light source device 70, the case 149 of the light source side optical system, the top plate of the optical system unit case 169, and the top panel. When flowing through the gap, the main control board disposed in the gap is also cooled.

  Therefore, according to the present invention, a cooling structure suitable for each of the blue and red light source devices 70 and 120 can be provided. Since the first cooling fan 261a and the second cooling fan 261b take in outside air from different directions before and after the projector 10, the intake air flow taken in by the first cooling fan 261a and the second cooling fan 261b take in There is no interference with the intake air flow.

  Further, since the guide member 301 is provided, the cooling air discharged after cooling the first and second heat sinks 81 and 130 attached to the first and second light source devices (blue and red light source devices 70 and 120). Are guided so as to flow in the same direction, it is possible to prevent interference between the cooling air discharged from each of the first and second heat sinks 81 and. Therefore, since the projector 10 can smoothly suck and exhaust the cooling air from the first and second cooling fans 261a and 261b, the blue and red light source devices 70 and 120 can be efficiently cooled.

  Accordingly, it is possible to provide the projector 10 that can cause the blue and red light source devices 70 and 120 to emit light brightly and project an image with a balanced chromaticity on the screen. Further, by separately cooling the blue and red light source devices 70 and 120 and managing the temperature, each light source device can always emit light brightly and the life of each light source device can be extended. Furthermore, since the heat sources other than the blue and red light source devices 70 and 120 such as the control circuit board 241 can be cooled by the cooling air discharged from the first and second heat sinks 81 and 130 in the same direction, the control circuit board 241 The performance of the projector 10 can be maintained for a long time while providing a simple projector 10 without providing a dedicated cooling means for cooling the components.

  And since the partition member 305 which divides the 1st and 2nd heat sinks 81 and 130 attached to the 1st and 2nd light source device and each light source device is arranged, the 1st and 2nd heat sinks 81 and 130 from the front-back direction are arranged. It is possible to guide the cooling air that has flowed in to the right side panel 14 side, which is one direction, together with the guide member 301, and to cool the blue and red light source devices 70 and 120 efficiently.

  Further, since the cooling air from the first and second auxiliary cooling fans 262a and 262b can be exhausted by changing the flow direction in the same direction by the auxiliary guide member 303, the first and second Optical components such as lenses and mirrors in the blue and red light source devices 70 and 120, the fluorescent light emitting device 100, the light source side optical system 140 and the optical system unit 160, effectively preventing interference between cooling air from the two auxiliary cooling fans 262a and 262b, And the main control board etc. can be cooled.

  The present invention is not limited to the above embodiments, and can be freely changed and improved without departing from the gist of the invention.

10 Projector
11 Top panel 12 Front panel
13 Rear panel 14 Right side panel
15 Left side panel 17 Exhaust hole
18 Air intake hole 19 Lens cover
20 Various terminals 21 Input / output connector
22 I / O interface 23 Image converter
24 Display encoder 25 Video RAM
26 Display drive unit 31 Image compression / decompression unit
32 Memory card 35 Ir receiver
36 Ir processing section 37 Key / indicator section
38 Control unit 41 Light source control circuit
43 Cooling fan drive control circuit 45 Lens motor
47 Audio processor 48 Speaker
51 Display element
60 Light source unit 70 Blue light source device
71 Blue light source 73 Collimator lens
75 Reflective mirror group 78 Condensing lens
79 Holder
81 First heat sink 100 Fluorescent light emitting device
101 Fluorescent wheel 110 Wheel motor
111 Condensing lens group 115 Condensing lens
120 Red light source 121 Red light source
125 Condenser lens group 130 Second heat sink
140 Light source side optical system 141 First dichroic mirror
143 First reflection mirror 145 Second reflection mirror
148 Second dichroic mirror
149 Case 160 Optical system unit
161 Lighting block 165 Image generation block
168 Projection block
169 Optical unit case 170 Light guiding optical system
173 Condensing lens 175 Light tunnel
178 Condensing lens 181 Optical axis conversion mirror
183 Condensing lens 185 Irradiation mirror
190 Third heat sink 195 Condenser lens
220 Projection-side optical system 225 Fixed lens group
235 Movable lens group 241 Control circuit board
261a 1st cooling fan 261b 2nd cooling fan
262a First auxiliary cooling fan 262b Second auxiliary cooling fan
301 Guide member 303 Auxiliary guide member
304 Auxiliary partition member 305 Partition member

Claims (7)

First and second light source devices;
A first heat sink attached to the first light source device and a second heat sink attached to the second light source device;
A first cooling fan that blows cooling air to the first heat sink and a second cooling fan that blows cooling air to the second heat sink, and
The first cooling fan and the second cooling fan take in outside air from different directions and blow cooling air to each of the first and second heat sinks,
A guide member for guiding the cooling air discharged from each of the first and second heat sinks to flow in the same direction is disposed between the first and second light source devices. . Front panel, back panel and left and right side panels;
A substantially rectangular parallelepiped housing composed of an upper panel and a lower panel disposed above and below the front, back, and side panels;
The guide member is disposed in the vicinity of the center of the housing so as to be substantially parallel to the front panel and the back panel,
One of the first and second light source devices is disposed closer to the back panel than the guide member, and the other is disposed closer to the front panel than the guide member.
The first and second cooling fans take outside air from the intake holes which are openings formed in the back panel and the front panel, respectively, and blow the air to the first and second heat sinks,
The cooling air that has flowed into the first and second heat sinks from the suction holes of the back panel and the front panel is configured to flow out of one of the left and right side panels by the guide member. The projector according to claim 1, wherein:   The partition member that partitions the first heat sink and the first light source device and partitions the second heat sink and the second light source device is substantially orthogonal to the front panel and the back panel, The projector according to claim 2, wherein the projector is disposed between the front panel and the back panel. A plurality of auxiliary cooling fans that take in outside air from the intake holes of the back panel and the front panel and blow cooling air to the light output sides of the first and second light source devices, respectively.
An auxiliary guide member for guiding the cooling air blown from each of the plurality of auxiliary cooling fans to flow in the direction of the other side panel of the left and right side panels is substantially parallel to the front panel and the back panel. The projector according to claim 2, wherein the projector is disposed near the center of the casing.   5. The heat generation source other than the first and second light source devices is cooled by cooling air discharged from each of the first and second heat sinks. Projector. The first and second light source devices are a blue light source device that emits light in a blue wavelength band, and a red light source device that emits light in a red wavelength band,
Fluorescence having a fluorescent light-emitting region in which a phosphor layer that emits light in the green wavelength band upon receiving light in the blue wavelength band is formed, and a diffusing transmission region that diffuses and transmits the light in parallel in the circumferential direction The light emitting device, the first and second light source devices, the blue and green wavelength band light emitted from the fluorescent light emitting device, and the red wavelength band light emitted from the red light source device are collected on a predetermined surface. A light source unit comprising a light source side optical system,
A display element;
A light guide optical system for guiding light from the light source unit to the display element;
A projection-side optical system that projects an image emitted from the display element onto a screen;
Projector control means for controlling the cooling fan, light source unit and display element;
The projector according to claim 1, further comprising: The projector according to claim 6, wherein the blue light source device includes a laser diode that emits light in a blue wavelength band, and the red light source device includes a light emitting diode that emits light in a red wavelength band.

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