JP2007127822A - Projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector having a structure for an exhaust temperature reduction capable of reducing an exhaust temperature even with a small-sized enclosure. <P>SOLUTION: The present invention encloses a light source device 63, a light source side optical system 61 for transmitting light of the light source device 63, a display element 51 for receiving the light from the light source side optical system 61 and generating a projection image, a projection side optical system 62 for projecting the projection image generated by the display element 51, and a cooling fan 110 for cooling the light source device 63. A partition wall 120 is provided for separating the enclosure into an air intake side chamber 121 and an exhaust side chamber 122. The light source device 63 is located in the exhaust side chamber 122. An air outlet 113 of the cooling fan 110 is located in the exhaust side chamber 122, and an air inlet 111 is located in the air intake side chamber 121. There is an exhaust hole 17 on the side wall of the enclosure on the exhaust side chamber 122 side, and an air intake hole 18 on the side wall of the enclosure on the air intake side chamber 121 side. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a data projector that projects an image based on a video signal or the like.

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

  In many cases, this data projector uses a small high-intensity light source such as a metal highland lamp or an ultra-high pressure mercury lamp, and the light emitted from the light source is converted into light of three primary colors by a color filter. It is structured to irradiate a display element called DMD (Digital Micro Device) and project the transmitted light or reflected light of the display element onto a screen through a lens group which is a projection side optical system having a zoom function. Yes.

  This data projector incorporates a plurality of heat sources such as a light source, a light source side optical system, a power supply circuit, and a display element, and the light source is heated to nearly 1000 degrees. For this reason, a mechanism for cooling the light source device, the power supply circuit, and the like, which are heat sources by providing an air cooling fan is incorporated. As such a cooling mechanism, a flow path is formed so as to distinguish a light source device that has a particularly high temperature and a large amount of heat generation from other heat generation sources, and a light source with cooling air that cools an optical system at a temperature lower than that of the light source device. Has been proposed, in which the power supply unit or the like is cooled by cooling air using a flow path different from that of the light source.

  For example, in Japanese Patent Application Laid-Open No. 2005-173020 (Patent Document 1), a plurality of cooling fans are used to cool a heat source of each partition flow path by providing a substrate and partition walls for creating an air flow in a housing. Air inside the housing is exchanged with outside air through the exhaust holes and intake holes.

However, the light source becomes hot from several hundred degrees to nearly 1000 degrees, and in order to reduce the exhaust temperature by mixing high-temperature exhaust hot air that has cooled these light sources and the outside air, a distance from the heat source may be required. In many cases, it has become necessary to increase the thickness of the projector or increase the size of the housing. In addition, the high-temperature exhaust hot air may heat the exhaust port and its surroundings, and there is a problem that the projection image fluctuates when the exhaust hot air circulates in front of the projection lens.
JP 2005-173020 A

  The present invention has been made in view of the above-described problems of the prior art. The entire projector can be efficiently cooled with a single fan, and further, a light source device that is a high-temperature heat source can be cooled. Cooling structure that can cool not only the air heated by cooling other heat sources but also cool the hot heat source with a low temperature and sufficient air volume with fresh outside air, and also reduce the temperature of the exhaust hot air An object of the present invention is to provide a projector provided with the projector.

  The present invention includes a light source device (63), a light source side optical system (61), a display element (51) that generates a projection image, a projection side optical system (62) that projects the projection image, and a light source. A blower (110) as a cooling fan for cooling the device (63), and a partition wall (120) partitioned into an intake-side space chamber (121) and an exhaust-side space chamber (122) inside the housing ), The light source device (63) is provided in the exhaust side space chamber (122), the cooling fan suction port (111) is positioned in the suction side space chamber (121), and the cooling fan discharge port (113) ) Is opened in the exhaust side space chamber (122), the side plate of the casing on the side of the intake side space chamber (121) is provided with an intake hole (18), and the side plate of the casing on the side of the exhaust side space chamber (122) Is a projector (10) provided with an exhaust hole (17).

The bottom plate (16) of the housing may be provided with a bottom suction hole (114) in the vicinity of the discharge port (113) of the blower (110) as a cooling fan in the exhaust side space chamber (122). The bottom intake hole (114) may be provided with a baffle plate (115) obliquely.
Further, a blower having a first suction port (117) and a second suction port (118) is used as a cooling fan, and both suction ports (117, 118) of the blower (110) are opposed surfaces of the blower (110). The fan bottom surface plate (16) may be provided with a fan intake hole (116) in the vicinity of the cooling fan suction port (118).
In addition, it is preferable to provide a louver (20) in the exhaust hole (17) formed in the side plate of the casing on the exhaust side space chamber (122) side.

  In this manner, the cooling fan suction port (111) is positioned in the intake-side space chamber (121), and the cooling fan discharge port (113) is opened in the exhaust-side space chamber (122). Air is blown to a light source unit such as a light source device (63), and the bottom plate (16) of the housing is exposed to a bottom air intake hole (113) in the vicinity of the discharge port (113) of the cooling fan in the exhaust side space chamber (122). 114) is provided and outside air is taken in from the bottom suction hole (114) by the negative pressure of the discharge air, and the discharge air and the outside air are mixed and blown to the light source part, or the first suction port (117) as a cooling fan And a blower (110) having a second suction port (118), the air in the housing is sucked from one suction port (117), and the bottom plate (16) of the housing is drawn from the other suction port (118). ) From the fan intake hole (116) provided near the cooling fan inlet (118) It is intended to blow the light source unit by mixing the outside air air suction housing outside air.

  According to the present invention, it is possible to efficiently cool the entire projector, and it is possible to provide a projector having a cooling structure capable of exhausting a sufficient air volume for cooling a light source device that is a high-temperature heat source.

  The projector 10 according to the best mode for carrying out the present invention is composed of a substantially rectangular parallelepiped housing. Inside the housing is a light source device 63 and a light source side optical system 61 that guides light from the light source device 63 to the display element 51. A display element 55 that receives light from the light source device 63 via the light source side optical system 61 and generates a projection image, a projection side optical system 62 that projects the projection image generated by the display element 55, and the light source device 63. And a blower 110 as a cooling fan for cooling.

  The housing includes a partition wall 120 that divides the interior of the housing into an intake-side space chamber 121 and an exhaust-side space chamber 122, and a suction port 111 of a blower 110 serving as a cooling fan disposed in the intake-side space chamber 121 is The discharge port 113 is connected to the partition wall 120 and the discharge port 113 is opened to the exhaust side space chamber 122, and the back plate 13 and the side plate 14 which are side plates are provided on the casing. , 15 is provided with an intake hole 18, and a cooling fan disposed in the intake-side space chamber 121 enables outside air to be taken into the intake-side space chamber 121, and a light source device 63 is provided in the exhaust-side space chamber 122. The front plate 12 which is a side plate has an exhaust hole 17 for discharging the air in the exhaust side space chamber 122 which has cooled the air to the outside of the housing.

  Further, the bottom plate 16 is provided with a bottom suction hole 114 in the vicinity of the cooling fan discharge port 113, and the outside air is discharged from the bottom suction hole 114 due to negative pressure generated by exhausting air from the cooling fan discharge port 113. The outside air sucked from the bottom air intake hole 114 and the air exhausted from the cooling fan discharge port 113 are mixed and exhausted together with the light source device 63 and the light source device 63 by this mixed air flow. The light source section including the reflecting mirror provided in the side space chamber 122 is cooled and the cooled air is discharged to the outside through the exhaust holes 17 provided in the front plate 12.

  A rectifying plate 115 is attached to the bottom intake hole 114 to prevent the exhaust from the discharge port 113 of the cooling fan from flowing out of the bottom intake hole 114. The exhaust hole 17 receives light from the housing. A louver 20 is provided so as not to leak outside.

  According to the present embodiment, not only exhaust from the discharge port 113 of the cooling fan, but also outside air can be sucked into the exhaust side space chamber 122 to cool the light source device 63, so that an abundant air volume can be secured. Thus, it is possible to provide a projector having a cooling structure capable of efficient cooling with a single fan.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, a projector according to an 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 that is a main body case. The face plate 12 is provided with a plurality of exhaust holes 17, and the exhaust holes 17 are provided with a louver 20 for preventing the light in the housing from leaking to the outside and preventing the exhaust hot air from flowing in front of the projection port. It is what you have.

  Although not shown in FIG. 1, a key / indicator portion is provided on the top plate 11 which is a main body case. The key / indicator portion includes a power switch key and power on / off. Are provided, such as a power indicator for informing the lamp, a lamp switch key for lighting the lamp of the light source device, a lamp indicator for displaying the lighting of the lamp, an overheat indicator for notifying when the light source device or the like is overheated.

  Further, on the back of the main body case (not shown), a control signal from a power supply adapter plug or a remote controller, and an input / output connector part provided with a USB terminal, a D-SUB terminal for inputting image signals, an S terminal, an RCA terminal, etc. Is provided with an Ir receiving unit or the like.

  A plurality of air intake holes 18 are provided in the right side plate 14 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 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, etc. The image signals of various standards input from the unit 21 are converted so as to be unified into image signals of a predetermined format suitable for display by the image conversion unit 23 via the input / output interface 22 and the system bus (SB). Are sent to the display encoder 24.

  The display encoder 24 develops and stores the transmitted image signal in the video RAM, generates a video signal from the stored contents of the video RAM, 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. Yes, the light from the light source device 63 is incident on the display element 51 through the light source side optical system to form an optical image with the reflected light of the display element 51, and through the projection system lens group serving as the projection side optical system. An image is projected and displayed on a screen (not shown), and the movable lens group 97 of the projection system lens group is driven by a lens motor 45 for zoom adjustment and focus adjustment.

  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 lamp 64 of the light source device, and the cooling fan drive control circuit 43 Is to detect the temperature by a temperature sensor provided in the light source device or the like to control the rotation speed of the cooling fan, and to maintain the rotation of the cooling fan even after the lamp of the light source device is turned off by a timer or the like.

  These ROM, RAM, IC and circuit elements are attached to the control circuit board 103 as the main control board. The power system power control circuit 41 is incorporated in the lamp power circuit block 101 to control the main control system. The control circuit board 103 as a board and the lamp power circuit block 101 of the power system are formed separately.

Further, as shown in FIG. 3, the projector 10 has an internal structure in which a power control circuit board 102 with a lamp power circuit block 101 and the like mounted thereon is disposed in the vicinity of the right side plate 14, and a sirocco fan as shown in FIG. A blower 110 of the type is arranged as a cooling fan in the vicinity of the back plate 13 in the bottom plate 16, the projection side optical system 62 is arranged along the left plate 15, and the light source device 63 is arranged in the vicinity of the front plate 12, The side optical system 61 is disposed behind the light source device 63 between the blower 110 and the projection side optical system 62.
The light source side optical system 61 includes a color wheel 71, a light guide rod 75, mirrors 72 and 74, a lens group 83, and the like.

  As shown in FIG. 5, the blower 110 has a suction port 111 on the upper surface side of the blower 110, and the discharge port 113 has a substantially square cross section and is connected to a partition wall, which will be described later, in a space distinguished by the partition wall. Exhaust air from the blower 110 is exhausted, and a control circuit board 103 is disposed in the vicinity of the suction port 111 of the blower 110.

  In addition, the projector 10 has a partition wall 120 inside, an intake side space chamber 121 in which relatively low temperature devices such as various optical systems and various substrates are arranged, and a high temperature device such as the light source device 63. And an exhaust-side space chamber 122 in which a light source unit such as a first reflecting mirror 72 and a color wheel 71 disposed near the light source device 63 is disposed.

Each partition wall 120 is composed of a plate-shaped first partition wall 123, a second partition wall 124, a third partition wall 125, and a fourth partition wall 126.
The first partition wall 123 is a wall for separating the projection side optical system 62 and the light source device 63, and the side surface from the front plate 12 is parallel to the left side surface 15 between the projection side optical system 62 and the light source device 63. To the vicinity of a substantially midpoint in the longitudinal direction.

  The second partition wall 124 extends in parallel with the front plate 12 from the end of the first partition wall 123, passes through the light guide rod 75, and further passes through the discharge port 113 of the blower 110, thereby providing a power control circuit board. Separated up to 102. The second partition is a partition provided to exhaust the exhaust from the discharge port 113 of the blower 110 completely to the exhaust side space chamber 120 side.

Further, the third partition 125 is separated from the end of the second partition 124 to the end of the power control circuit board 102 in parallel with the power control circuit board 102.
The fourth partition 126 is spaced from the end of the third partition 125 to the right side surface 14 in parallel with the front plate 12.
The third partition wall 125 and the fourth partition wall 126 are partition walls provided to partition the power supply control circuit board 102 and the exhaust side space chamber 122.

  In addition, the 1st partition 121, the 2nd partition 122, the 3rd partition 123, and the 4th partition 124 use the board | plate material which has heat insulation. Thereby, it is possible to prevent the high heat generated by the light source device 63 in the exhaust side space 122 from leaking to the outside.

  As shown in FIG. 6, the bottom plate 16 is provided with a bottom suction hole 114 in the vicinity of the discharge port 113 of the blower 110 serving as a cooling fan. When the exhaust air is discharged from the discharge port 113 of the blower 110, a negative pressure is generated on the upper surface of the bottom plate 16, and outside air is taken in from the bottom intake hole 114 of the bottom plate 16. Thus, after the other devices are cooled, the air that is sucked from the suction port 111 of the blower 110 and discharged to the exhaust side space chamber 122 and the low-temperature outside air that is sucked from the bottom suction hole 114 of the bottom plate 16 are exhausted. The air is mixed in the chamber 122, and the mixed air cools the light source device 63, the color wheel 71, and the like.

  Further, the bottom intake hole 114 is provided with a rectifying plate 115 obliquely in the same direction as the flow so that the air discharged from the discharge port 113 does not leak to the outside, thereby exhausting air from the blower 110 to the outside. Can be prevented from leaking.

  As shown in FIG. 4, the optical system of the projector 10 includes a light source device 63 in which an ultrahigh pressure mercury lamp is provided as a discharge lamp 64 inside a reflector 65 whose front surface is covered with explosion-proof glass, and the light source device 63. A light source side optical system 61 that irradiates a DMD (digital micromirror device) that uses light emitted from the display element 51 as a display element 51, the display element 51 shown in FIG. The lens group of the projection-side optical system 62 that emits the light to be emitted to the screen.

  The light source side optical system 61 includes a first reflection mirror 72 that reflects the light emitted from the light source device 63 to the color wheel 71, and color filters for red light, green light, and blue light provided around the wheel motor. The color wheel 71 rotated by 73, the light guide rod 75 that uses the light transmitted through the filter of the color wheel 71 as a light beam with a uniform intensity distribution, and the direction of the light emitted from the light guide rod 75 is changed by 90 degrees. A light source side lens group 83 formed by a second reflection mirror 74 and a plurality of lenses for condensing the light reflected by the second reflection mirror 74 on the display element 51, and the light transmitted through the light source side lens group 83 as a display element 51 is formed by an irradiation mirror that irradiates 51 at a predetermined angle.

  The second reflecting mirror 74 is fixed by a mirror fixture 70 so as to be supported between the bottom plate 16 and the like and the top plate 11. Although the second reflecting mirror 74 is used in this embodiment, it is only necessary to change the direction of light from the light guide rod 75, and the same effect can be obtained by using the light guide rod 75 and a prism in combination. be able to.

  Further, the projection-side optical system 62 includes a fixed lens group 93 built in the fixed barrel 91 and a movable lens group 97 built in the movable barrel 95, and is a variable focus type lens having a zoom function. The movable lens group 97 is moved by the lens motor 45 to enable zoom adjustment and focus adjustment.

  Next, the flow of air in the projector 10 will be described. As shown in FIG. 7, the back plate 13 is provided with an intake hole 18 at a rear portion of the display element 51, and an air flow passage is formed by the back plate 13 and the display element mounting plate 55 and provided on the back plate 13. The outside air sucked from the intake holes 18 provided behind the intake holes 18 and the left side plate 15 flows along the back plate 13 in the direction of the blower 110.

  A display element heat radiating plate 53 is disposed behind the display element mounting plate 55, and the control circuit board 103 serves as two control boards between the two control circuit boards 103 or two control circuits. The air flowing along the control circuit board 103 above or below the board 103 is sucked into the suction port 111 of the blower 110.

  Therefore, when the fan of the blower 110 is rotated, the blower 110 serving as a cooling fan sucks the surrounding air from the suction port 111 and sucks the air around the blower 110 inside the projector 10, so that the side plate of the casing of the projector 10 The outside air can be sucked into the projector 10 through a large number of intake holes 18 provided in the projector 10.

  Then, a part of the outside air sucked from the rear intake hole 18 in the left side plate 15 and the intake hole 18 provided in the rear plate 13, the rear plate 13 and the display element mounting plate 55 so as to cool the display element heat radiating plate 53. Between the air flow path between the control circuit board 103 and the upper and lower surfaces of the control circuit board 103 and the space between the control circuit boards 103 and sucked into the suction port 111 of the blower 110. Further, other outside air sucked from the suction hole 18 of the left side plate 15 cools the projection side optical system 62, the second reflection mirror 74, the exposed portion of the light guide rod 75, and the like, and is sucked into the suction port 111 of the blower 110. It is.

  In addition, part of the outside air sucked into the projector 10 from the air intake hole 18 of the right side plate 14 reaches the control circuit board 103 while cooling the power supply circuit board 102 through the periphery of the lamp power supply 101 and the like. It is sucked into the suction port 111 of the blower 110 so as to flow along 103. The remaining sucked outside air flows along the first partition wall 121 and is sucked into the suction port 111 of the blower 110.

  The exhaust of the blower 110 blown into the exhaust-side space chamber 122 sucks the outside air from the suction holes of the bottom plate 16 by negative pressure and mixes the outside air with the exhaust air, and a part of the mixed air enters the color wheel 71. The most part flows around the light source device 63 that has become hot. A part of the air flowing around the light source device 63 flows from the opening provided in the reflector 65 so as to pass through the inside of the reflector 65, and the light source unit such as the light source device 63, the first reflecting mirror 72, and the color wheel 71. Cool down.

  In this way, the high-temperature air after cooling the light source device 63 and the color wheel 71 in the exhaust-side space chamber 122 spreads throughout the front plate 12 and is discharged from the exhaust holes 17 provided in the front plate 12. . Since the louver 20 is attached to the exhaust hole 17, it is possible to block the internal light so as not to leak to the outside, and to reduce the exhaust temperature discharged to the outside. Since the louver 20 is attached obliquely toward the side, it is possible to prevent high-temperature exhaust from being discharged toward the projection-side optical system 62.

  According to the present embodiment, the bottom suction hole 114 is provided in the exhaust-side space chamber 122, and outside air is sucked from the bottom suction hole 114 by the negative pressure generated by exhausting air from the discharge port 113 of the blower 110. By mixing the air from 113 and the outside air sucked from the bottom intake hole 114, the air volume in the exhaust-side space chamber 122 can be sufficiently increased and the temperature of the air blown to the light source device 63 and the like can be lowered. In addition, the temperature of the light source device 63 that reaches a high temperature close to 1000 degrees can be sufficiently cooled, and the temperature of the exhaust hot air discharged to the outside of the projector 10 can also be reduced.

Further, according to the present embodiment, since the interior of the projector 10 is completely partitioned into the intake side space chamber 121 and the exhaust side space chamber 122, the high temperature air in the exhaust side space chamber 122 is sucked into the intake side space chamber 121. It can also be prevented from flowing in.
The wheel motor 73 and the color wheel 71 are not limited to being arranged in the exhaust side space chamber 122, but may be arranged in the intake side space chamber 121 near the emission side end of the light guide rod 75. .

  Next, another embodiment of the present invention will be described. As shown in FIG. 8, the projector 10 of the present embodiment uses a blower 110 having a first suction port 117 and a second suction port 118 on both sides, and a fan intake near the second suction port 118 of the bottom plate 16. A hole 116 is provided.

  As described above, the air flow in the vicinity of the blower 110 having the suction ports 117 and 118 on the opposite surfaces sucks the air in the suction side space chamber 121 around the control circuit board 103 through the first suction port 117, and the second suction. Outside air is sucked in through the port 118, and the air sucked in through the first suction port 117 and the second suction port 118 is mixed and exhausted from the discharge port 113 to the exhaust side space chamber 122.

As a result, the amount of air exhausted into the exhaust side space 122 can be increased and the temperature can be decreased, and a sufficient amount of air can be secured to cool the light source device 63 that reaches a high temperature close to 1000 degrees. The temperature can also be lowered. Other configurations are the same as in the previous embodiment.
The cooling fan built in the projector 10 is not limited to the blower 110 in which the discharge port 113 is opened in the exhaust side space chamber 122 and the suction ports 111 and 117 are arranged in the intake side space chamber 121. Additional auxiliary cooling fans may be provided to individually cool the various heat sources of 121.

  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. The exhaust temperature reducing structure of the present invention can be used not only for a projector but also for a rear projection TV, a personal computer, and the like. The cooling fan is not limited to the sirocco fan type blower 110.

The figure which shows the external appearance of the data projector concerning one Example of this invention. The control block diagram of the data projector concerning one Example of this invention. The perspective view which removed a part of upper surface board of the data projector concerning one Example of this invention. The perspective view which removed the upper surface board of the data projector concerning one Example of this invention. The perspective view of the blower of the data projector concerning one Example of this invention. 1 is a cross-sectional view of the vicinity of a blower of a data projector according to one embodiment of the present invention. Explanatory drawing which shows the flow of the air of the data projector concerning one Example of this invention. Sectional drawing of the blower vicinity of the data projector concerning 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 Louver 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 Power control circuit
43 Cooling fan drive controller 45 Lens motor
47 Audio processor 48 Speaker
51 Display element 53 Heat sink
55 Display element mounting plate 61 Light source side optical system
62 Projection-side optical system 63 Light source device
64 Discharge lamp 65 Reflector
70 Mirror fixture 71 Color wheel
72 First reflection mirror 73 Wheel motor
74 Second reflection mirror 75 Light guide rod
81 Lens barrel 83 Light source lens group
91 Fixed lens tube 93 Fixed lens group
95 Movable lens tube 97 Movable lens group
101 Lamp power circuit block 102 Power control circuit board
103 Control circuit board 110 Blower
111 Suction port 113 Discharge port
114 Bottom intake hole 115 Rectifier plate
116 Fan inlet 117 First inlet
118 Second suction port 120 Partition wall
121 Inlet side space 122 Exhaust side space
123 1st partition 124 2nd partition
125 3rd partition 126 4th partition

Claims (8)

A light source device, a light source side optical system, a display element that generates a projection image, a projection side optical system that projects the projection image, and a cooling fan that cools the light source device,
A partition wall for partitioning into an intake side space chamber and an exhaust side space chamber is provided inside the housing,
Having the light source device in the exhaust side space chamber;
The suction port of the cooling fan is located in the intake side space chamber, and the discharge port of the cooling fan opens into the exhaust side space chamber,
A projector having an intake hole in a side plate of the casing on the intake side space chamber side and an exhaust hole in a side plate of the casing on the exhaust side space chamber side.   The projector according to claim 1, wherein the bottom plate of the housing has a bottom intake hole in the vicinity of the discharge port of the cooling fan.   The projector according to claim 1, wherein a rectifying plate is obliquely installed in the bottom intake hole.   The projector according to claim 1, wherein the cooling fan is a blower having a first suction port and a second suction port, and each suction port is provided on a surface facing the blower.   The projector according to claim 4, wherein the bottom plate of the housing has a fan intake hole in the vicinity of the suction port of the cooling fan.   6. The projector according to claim 1, wherein a louver is provided obliquely in the exhaust hole. A light source device, a light source side optical system, a display element that generates a projection image, a projection side optical system that projects the projection image, and a cooling fan that cools the light source device,
While cooling the light source device and the like by blowing the air in the housing to the light source unit by the cooling fan,
An intake hole for taking in the outside air is provided near the discharge port of the cooling fan, the outside air is taken in from the intake hole by the negative pressure of the discharge air of the cooling fan and mixed with the air in the housing, and this mixed air is supplied to the light source unit. A projector characterized by spraying. A light source device, a light source side optical system, a display element that generates a projection image, a projection side optical system that projects the projection image, and a cooling fan that cools the light source device,
While cooling the light source device and the like by blowing the air in the housing to the light source unit by the cooling fan,
A projector characterized in that outside air is taken in by the cooling fan and mixed with air in the housing, and the mixed air is blown onto the light source device or the like.

Images