WO2021235102A1 - 投射型表示装置 - Google Patents
投射型表示装置 Download PDFInfo
- Publication number
- WO2021235102A1 WO2021235102A1 PCT/JP2021/013362 JP2021013362W WO2021235102A1 WO 2021235102 A1 WO2021235102 A1 WO 2021235102A1 JP 2021013362 W JP2021013362 W JP 2021013362W WO 2021235102 A1 WO2021235102 A1 WO 2021235102A1
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- WIPO (PCT)
- Prior art keywords
- fan
- display device
- type display
- projection type
- intake port
- Prior art date
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- 238000001816 cooling Methods 0.000 claims abstract description 66
- 230000003287 optical effect Effects 0.000 claims abstract description 54
- 230000015572 biosynthetic process Effects 0.000 abstract 2
- 239000004973 liquid crystal related substance Substances 0.000 description 16
- 238000006243 chemical reaction Methods 0.000 description 15
- 238000005286 illumination Methods 0.000 description 11
- 230000010287 polarization Effects 0.000 description 11
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- 238000007664 blowing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000003507 refrigerant Substances 0.000 description 4
- 239000003086 colorant Substances 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
- H04N9/3167—Modulator illumination systems for polarizing the light beam
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/16—Cooling; Preventing overheating
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/3144—Cooling systems
Definitions
- the present disclosure relates to, for example, a projection type display device provided with a cooling unit for cooling an optical system.
- Patent Document 1 a first circulation flow path in which a first refrigerant (gas) for cooling a first cooling target arranged in a substantially sealed first space circulates, and a second for cooling the first refrigerant.
- a projector having a second circulation flow path and a third circulation flow path in which a refrigerant and a third refrigerant (each liquid) circulate is disclosed.
- Patent Document 2 a first air passage provided in a closed space for cooling an illumination optical unit and an image forming unit arranged in parallel with each other, a housing forming the closed space, and an illumination optical unit and an image forming unit are provided.
- a projection type display device provided between the housing and the housing for accommodating the light source unit and having a second air passage for cooling the light source unit is disclosed.
- the projection type display device is required to improve quietness.
- the projection type display device of one embodiment of the present disclosure includes a light source unit, an image forming optical system including a space modulation element for modulating light emitted from the light source unit, and projection optics for projecting light from the space modulation element. It is provided with a system, a cooling unit having a fan for blowing cooling air to an image forming optical system, and a heat exchanger arranged directly facing the fan.
- heat is generated by arranging a fan provided in a cooling unit for blowing cooling air to an image forming optical system including a space modulation element and a heat exchanger facing each other. Insulate the noise generated by the fan by the exchanger.
- FIG. 3 is a cross-sectional view taken along the line II shown in FIG.
- FIG. 3 is a cross-sectional view taken along the line II-II shown in FIG.
- FIG. 3 is a figure which shows the accommodation example of the cooling part and the heat exchanger in the projection type display device shown in FIG.
- sectional drawing which shows the other example of the structure of the cooling part and the heat exchanger which concerns on the modification 1 of this disclosure.
- sectional drawing which shows the other example of the structure of the cooling part and the heat exchanger which concerns on the modification 2 of this disclosure.
- FIG. 1 shows an example of a schematic configuration of a projection type display device (projection type display device 1) according to an embodiment of the present disclosure.
- the projection type display device 1 is a projection type display device that projects an image (image light) onto a screen 1000 (projected surface) such as a wall surface.
- the projection type display device 1 is, for example, an image forming optical system 200 including a light source unit 100 and a space modulation element (liquid crystal panel 231R, 231G, 231B) that modulates the light (illumination light L) emitted from the light source unit 100.
- a projection optical system 300 for projecting light (video light) from each of the liquid crystal panels 231R, 231G, and 231B.
- the projection type display device 1 further includes a cooling unit 400 having a fan (for example, a fan 410, see FIG. 3) for blowing cooling air to the image forming optical system 200, and a heat exchanger 500, and has the present implementation.
- a fan for example, a fan 410, see FIG. 3
- the fan 410 is arranged to face the heat exchanger 500.
- the projection type display device 1 is, for example, a reflection type 3LCD type projection type display device that performs optical modulation by a reflective liquid crystal display (LCD).
- the projection type display device 1 includes a light source unit 100, an image forming optical system 200, a projection optical system 300, a cooling unit 400, and a heat exchanger 500, and constitutes the cooling unit 400, for example, a fan 410.
- the heat exchanger 500 is arranged facing each other.
- the projection type display device 1 further includes a power supply unit 600, a signal processing unit 700, and a heat dissipation unit 800, which are a light source unit 100, an image forming optical system 200, a projection optical system 300, and a cooling unit 400.
- the heat exchanger 500, the power supply unit 600, the signal processing unit 700, and the heat dissipation unit 800 are housed in the housing 900.
- FIG. 2 shows an example of the configuration of the light source unit 100 shown in FIG.
- the light source unit 100 includes a light source 110, condensing mirrors 111A, 111B, 112, a wavelength conversion unit 120, and condensing lenses 130A, 130B.
- the light source 110 is a solid-state light source that emits light in a predetermined wavelength range, and is for exciting phosphor particles contained in the phosphor layer of the wavelength conversion unit 12 described later.
- a semiconductor laser Laser Diode: LD
- a light emitting diode Light Emitting Diode: LED
- LED Light Emitting Diode
- the condensing mirrors 111A and 111B have a concave reflecting surface that makes the light flux emitted from a plurality of LDs arranged in the light source 110 substantially parallel and concentrates on the condensing mirror 112.
- the condensing mirror 112 is for reflecting the light concentrated by the condensing mirrors 111A and 111B to the wavelength conversion unit 120.
- the wavelength conversion unit 120 converts the light (excitation light EL) emitted from the light source 110 into light (fluorescent FL) having a different wavelength range and emits the light.
- the wavelength conversion unit 120 is, for example, a so-called transmissive wavelength conversion element in which a phosphor layer is provided on the surface of a support substrate having light transmission, and the fluorescent FL generated by the incident of excitation light EL is placed on the back surface of the support substrate. It is configured to emit to.
- the condensing lenses 130A and 130B for example, condense the light emitted from the light source 110 and incident on the condensing mirrors 111A, 111B, 112 to a predetermined position of the wavelength conversion unit 120.
- the light emitted from the light source 110 (for example, blue light) is reflected by the condenser mirrors 111A, 111B, 112, enters the condenser lenses 130A, 130B, and is irradiated to a predetermined position of the wavelength conversion unit 120.
- the light incident on the wavelength conversion unit 120 is wavelength-converted (for example, yellow light) in the phosphor layer and emitted toward the image forming optical system 200.
- This yellow light is, for example, combined with blue light emitted from a blue light source (not shown) separately provided in the light source unit 100 and incident on the image forming optical system 200 as white illumination light L.
- the image forming optical system 200 has, for example, an illumination optical system 210 and an image forming unit 220.
- the illumination optical system 210 includes a fly-eye lens 211 (211A, 211B), a polarizing conversion element 212, a lens 213, a dichroic mirror 214A, 214B, a reflection mirror 215A, 215B, and a relay from a position close to the light source unit 100. It has lenses 216A and 216B, a dichroic mirror 217, and polarizing plates 218R, 218G and 218B.
- the fly-eye lenses 211 aim to homogenize the illuminance distribution of the illumination light L from the light source unit 100.
- the illumination light L is divided into a plurality of luminous fluxes by the plurality of microlenses of the fly-eye lens 211A, and is imaged on the corresponding microlenses of the fly-eye lens 211B.
- each of the plurality of microlenses functions as a secondary light source, and a plurality of parallel lights having the same brightness are emitted toward the polarization conversion element 212.
- the polarization conversion element 212 aligns the polarization axes of the illumination light L incident through the fly-eye lenses 211 (211A, 211B) and the like with a predetermined polarization state. For example, randomly polarized light is converted into P-polarized light.
- the polarization conversion element 212 emits illumination light L including red light Lr, green light Lg, and blue light Lb via, for example, a lens arranged on the emission side of the light source unit 100.
- the lens 213 collects the light from the polarization conversion element 212 toward the dichroic mirrors 214A and 214B.
- the dichroic mirrors 214A and 214B selectively reflect light in a predetermined wavelength range and selectively transmit light in other wavelength ranges.
- the dichroic mirror 214A mainly reflects red light Lr and green light Lg in the direction of the reflection mirror 215A.
- the dichroic mirror 214B mainly reflects the blue light Lb in the direction of the reflection mirror 215B.
- the illumination light L emitted from the light source unit 100 is separated into a plurality of colored lights of different colors (for example, red light Lr, green light Lg, and blue light Lb).
- the reflection mirror 215A reflects the light from the dichroic mirror 214A (mainly red light Lr and green light Lg) toward the relay lens 216A, and the reflection mirror 215B reflects the light from the dichroic mirror 214B (mainly blue light Lb). Is reflected toward the relay lens 216B.
- the relay lens 216A transmits the light from the reflection mirror 215A (mainly red light Lr and green light Lg) and condenses it on the dichroic mirror 217.
- the relay lens 216B transmits the light (mainly blue light Lb) from the reflection mirror 215B and condenses it on the polarizing plate 218B.
- the dichroic mirror 217 selectively reflects the green light Lg toward the polarizing plate 218G and selectively transmits light in other wavelength ranges.
- the polarizing plates 218R, 218G, and 218B include a polarizing element having a polarization axis in a predetermined direction. For example, when the polarization conversion element 212 is converted to P-polarized light, the polarizing plates 218R, 218G, and 218B transmit the P-polarized light and reflect the S-polarized light.
- the image forming unit 220 has a reflective polarizing plate 221R, 221G, 221B, a liquid crystal panel 222R, 222G, 222B for modulation of red light Lr, green light Lg, and blue light Lb, and a dichroic prism 223. ing.
- the reflective polarizing plates 221R, 221G, and 221B transmit light having the same polarization axis as the polarization axis of the polarized light from the polarizing plates 218R, 218G, and 218B (for example, P-polarized light), and light of other polarization axes (for example, P-polarized light). It reflects S-polarized light).
- the reflective polarizing plate 221R transmits the P-polarized red light Lr from the polarizing plate 218R toward the liquid crystal panel 222R.
- the reflective polarizing plate 221G transmits the P-polarized blue light Lb from the polarizing plate 218G in the direction of the liquid crystal panel 222G.
- the reflective polarizing plate 221B transmits the P-polarized green light Lg from the polarizing plate 218B toward the liquid crystal panel 222B. Further, the reflective polarizing plate 221R reflects the S-polarized red light Lr from the liquid crystal panel 222R and causes it to be incident on the dichroic prism 223. The reflective polarizing plate 221G reflects the S-polarized blue light Lb from the liquid crystal panel 222G and causes it to enter the dichroic prism 223. The reflective polarizing plate 221B reflects the S-polarized green light Lg from the liquid crystal panel 222B and causes it to enter the dichroic prism 222.
- the liquid crystal panels 222R, 222G, 222B are electrically connected to a signal source (for example, a PC or the like) (not shown) that supplies an image signal including image information.
- the liquid crystal panels 222R, 222G, and 222B spatially modulate red light Lr, green light Lg, and blue light Lb for each pixel based on the image signals of the supplied colors to generate a red image, a green image, and a blue image, respectively. ..
- the dichroic prism 223 synthesizes red light Lr, blue light Lb, and green light Lg modulated in the liquid crystal panels 222R, 222G, and 222B, and emits them toward the projection optical system 300.
- the projection optical system 300 has, for example, a plurality of lenses.
- the projection optical system 300 enlarges the image light from the image forming unit 220 and projects it onto the screen 1000 or the like.
- the cooling unit 400 is for cooling the image forming optical system 200, and although the details will be described later, it has, for example, one or a plurality of fans (for example, fans 410, 420, 440).
- the heat exchanger 500 is for transferring the heat generated in the image forming optical system 200 to the heat radiating unit 800.
- the heat exchanger 500 has a structure in which a plurality of fins 511 made of, for example, a metal plate are erected at predetermined intervals with respect to the lower surface of the housing 900, for example. For example, it is provided over the image forming optical system 200 and the cooling unit 400.
- the power supply unit 600 has various optical systems (for example, a light source unit 100 and the like) housed in the housing 900, a power supply circuit of the cooling unit 400, and the like, and is composed of a plurality of elements.
- various optical systems for example, a light source unit 100 and the like housed in the housing 900, a power supply circuit of the cooling unit 400, and the like, and is composed of a plurality of elements.
- the signal processing unit 700 has, for example, a light source driving unit, an image processing unit, a projection optical system driving unit, a control unit, and the like.
- the image processing unit acquires an image signal input from the outside and, for example, discriminates the image size, discriminates the resolution, discriminates whether the image is a still image or a moving image, and the like. In the case of a moving image, the attributes of the image data such as the frame rate are also determined.
- the projection optical system drive unit includes a motor that drives a lens arranged in the projection optical system 300.
- the projection optical system drive unit drives, for example, the projection optical system 300 according to the control of the control unit, and performs, for example, zoom adjustment, focus adjustment, aperture adjustment, and the like.
- the control unit controls, for example, a light source drive unit, an image processing unit, and a projection optical system drive unit.
- the heat radiating unit 800 is for radiating heat generated in the housing 900, and like the heat exchanger 500, for example, a plurality of fins made of a metal plate are laminated at predetermined intervals, and for example, heat pipes are laminated with each other. Has a structure connected by.
- the heat pipe is also connected to, for example, a plurality of fins 511 constituting the heat exchanger 500, whereby the heat generated in the image forming optical system 200 is transferred to the heat radiating unit 800 via the heat exchanger 500. It has become like.
- FIG. 3 shows an example of the configuration of a plurality of fans (fans 410, 420, 430) and the heat exchanger 500 constituting the cooling unit 400 shown in FIG.
- FIG. 4 shows the cross-sectional configuration of the cooling unit 400 and the heat exchanger 500 in the line II shown in FIG. 3
- FIG. 5 shows the cooling unit 400 and the cooling unit 400 in the line II-II shown in FIG. It shows the cross-sectional structure of the heat exchanger 500.
- the cooling unit 400 is for cooling the image forming optical system 200 as described above, and is for cooling, for example, the reflective polarizing plates 221R, 221G, and 221B. As shown in FIG. 3, the cooling unit 400 has, for example, three fans 410, 420, 430.
- the fan 410 has, for example, a main body 411 including a motor and a rotary blade that rotates integrally with the rotor of the motor, and a housing 412 that houses the main body 411.
- the housing 412 has an intake port 413 on one of the pair of flat surfaces facing each other, and an air outlet 414 on a side surface portion.
- the air outlet 414 is, for example, spatially connected to the reflective polarizing plate 221B, and the air sucked from the intake port 413 is blown from the air outlet 414 toward the reflective polarizing plate 221B as cooling air. It has become like.
- a sirocco fan or a centrifugal fan can be used.
- the three fans 410, 420, 430 have their respective intake ports 413,423,433 directly or indirectly arranged to face the heat exchanger 500.
- the fan 410 is arranged so that the intake port 413 faces the surface 511S on which a plurality of fins 511 constituting the heat exchanger 500 are erected. Has been done. As a result, the noise generated when air is sucked from the intake port 413 is shielded by the heat exchanger 500.
- the fan 420 has an intake port 423 with respect to the surface 511S above the surface of the fan 410 opposite to the surface provided with the intake port 413, similarly to the fan 410. They are stacked so as to face each other.
- the intake port 423 of the fan 420 is arranged to face the surface 511S in which a plurality of fins 511 are erected with the fan 410 in between.
- the air outlet 424 of the fan 420 is, for example, spatially connected to the reflective polarizing plate 221G, and the air sucked from the intake port 423 is blown from the air outlet 424 toward the reflective polarizing plate 221G as cooling air. It is supposed to be done.
- a pair of facing flat surfaces are arranged along the stacking direction (for example, the Z-axis direction) of the fan 410 and the fan 420.
- the intake port 433 of the fan 430 is arranged on the opposite side of the fans 410 and 420, for example, and the intake port 433 and the surface 511S on which a plurality of fins 511 are erected are indirectly connected to each other via a duct. It is placed facing each other.
- the air outlet 434 of the fan 430 is spatially connected to, for example, a reflective polarizing plate 221R via a duct, for example, and the air sucked from the intake port 433 serves as cooling air and is reflected polarized light from the air outlet 434. The air is blown toward the plate 221R.
- the three fans 410, 420, 430 are covered with two housings 910 and 920 in the housing 900, for example, as shown in FIG.
- the housing 910 covers the three fans 410, 420, 430 and the heat exchanger 500.
- the housing 910 further functions as a support member for the three fans 410, 420, 430, and the positions of the three fans 410, 420, 430 are fixed, for example, by the housing 910.
- the fan 420 is attached to the opening 910H having substantially the same shape as the intake port 423 provided on the upper surface of the housing 910 that covers the upper part of the fan 410, and the housing 422 of the fan 420 is the housing. It constitutes a part of the body 910.
- the three fans 410, 420, 430 and the heat exchanger 500 are housed in a substantially sealed space by the housing 910, and the substantially sealed space is contained in each of the three fans 410, 420, 430. It is used as a duct that spatially connects to the heat exchanger 500.
- the housing 920 covers the three fans 410, 420, 430, the heat exchanger 500, and the image forming optical system 200, and is arranged outside the housing 910.
- the intake port 433 of the fan 410 and the fan 430 arranged along the stacking direction of the fan 420 is covered with the double housings (housings 910 and 920).
- the housing 910 is further opened at a position corresponding to, for example, the image forming portion 220, whereby the spaces inside the housing 910 and the housing 920 are connected so that air can circulate. Specifically, it is sucked from the intake ports 413,423,433 of the fans 410, 420, 430, and blown from the air outlets 414,424,434 toward the reflective polarizing plates 221R, 221G, 221B to be warmed. The air is carried to the heat exchanger 500 through the opening of the housing 910, cooled by the plurality of fins 511 constituting the heat exchanger 500, and again, the intake ports 413 and 423 of the fans 410, 420, 430. Inhaled from 433.
- the projection type display device 1 of the present embodiment includes a fan (fan 410, 420, 430) for blowing cooling air to, for example, a reflective polarizing plate 221R, 221G, 221B of the image forming optical system 200, and a heat exchanger 500. By arranging them facing each other, the noise generated from the fans 410, 420, 430 is insulated by the heat exchanger 500. This will be described below.
- the fans 410, 420, 430 that blow the cooling air to the reflective polarizing plates 221R, 221G, 221B and the heat exchanger 500 are arranged to face each other.
- the intake ports 413 and 423 of the fan 410 and the fan 420 are arranged to face the surface 511S on which a plurality of fins 511 constituting the heat exchanger 500 are erected, and further, the fan is further arranged.
- the intake port 433 of the 430 is spatially facing the surface 511S via a duct.
- the intake ports 413,423,433 of the fans 410, 420, 430 which contribute to noise, are placed on the surface 511S on which a plurality of fins 511 are erected. Since the arrangement is made to face each other, the noise generated from the fans 410, 420, 430 is isolated by the heat exchanger 500. Therefore, it is possible to improve the quietness while increasing the brightness.
- the fans 410, 420, 430 accommodate the housing 910 accommodating the cooling unit 400 and the heat exchanger 500, and the image forming optical system 200 in addition to these. It was covered with two housings, the housing 920 and the housing 920. That is, since the fans 410, 420, and 430 are covered with a housing having a substantially sealed double structure, it is possible to further improve the cooling efficiency and quietness. In addition, it is possible to improve dust resistance.
- the intake port (for example, the intake port 413,423,433) is arranged directly or directly with another fan (for example, the fan 410) facing the heat exchanger 500.
- another fan for example, the fan 410 facing the heat exchanger 500.
- An example of spatial connection via a duct is shown, but the present invention is not limited to this.
- a fan 440 is arranged above the heat exchanger 500, for example, along the Z-axis direction, and a duct 911 for spatially connecting the intake port 443 and the housing 910 is provided.
- the opening 911H of the duct 911 may be arranged to face the heat exchanger 500.
- the fan 540 is arranged so that the surface opposite to the surface having the intake port 453 faces the heat exchanger 500, and the side surface portion of the housing 452 and the housing 910 are arranged.
- the opening 912H configured by the above may be arranged to face the heat exchanger 500. That is, the intake port of each fan may be spatially facing the heat exchanger 500, and the same effect as that of the above embodiment can be obtained even if the intake port is not necessarily directly facing the heat exchanger 500. Can be done.
- These openings 911H and 912H correspond to a specific example of the "second intake port" of the present disclosure.
- a device other than the projection type display device 1 may be configured.
- a reflective liquid crystal panel is used as a spatial modulation element
- light modulation is performed by a transmissive liquid crystal panel, for example, projection of a transmissive 3LCD method.
- the spatial modulation element is not limited to the liquid crystal panel, and for example, a DMD (Digital Micromirror Device) or the like can be used.
- the present technology can also have the following configurations.
- the fan provided in the cooling section that blows the cooling air to the image forming optical system including the space modulation element and the heat exchanger are arranged facing each other, so that heat exchange is performed.
- the vessel blocks the noise generated by the fan. Therefore, it is possible to improve the quietness.
- the fan has a pair of flat surface portions having an intake port on one side and a side surface portion having an air intake port, and the flat surface portion having the intake port is arranged to face the heat exchanger.
- the projection type display device according to (1) (3)
- the heat exchanger has a structure in which a plurality of fins are erected at predetermined intervals.
- the fan has a pair of flat portions having a first intake port on one side, a side surface portion having an air outlet, and a duct forming a second intake port spatially connected to the first intake port.
- the projection type display device having a housing surrounding the cooling unit, The fan has a pair of flat surface portions having a first intake port on one side, a side surface portion having an air outlet, and a second intake port composed of the side surface portion and the housing.
- the projection type display device having a housing surrounding the cooling unit, The fan has a pair of flat surface portions having a first intake port on one side, a side surface portion having an air outlet, and a second intake port composed of the side surface portion and the housing.
- the projection type display device is arranged facing the heat exchanger.
- the heat exchanger has a structure in which a plurality of fins are erected at predetermined intervals.
- the projection type display device according to (4) or (5) above, wherein the second intake port of the fan is arranged to face the surface on which the plurality of fins are erected.
- the projection type display device according to any one of (1) to (6), further comprising a housing having a double structure surrounding the cooling unit.
- the cooling unit has a first fan and a second fan.
- the projection type display device according to any one of (1) to (6), wherein the first fan and the second fan are laminated above the heat exchanger.
- the intake port of the first fan faces the heat exchanger and
- the projection type display device according to (8) above, wherein the intake port of the second fan faces the heat exchanger with the first fan in between.
- the cooling unit further has a third fan.
- the projection type display device according to (8) or (9), wherein the third fan is arranged along the stacking direction of the first fan and the second fan.
- the projection type display device (11) The projection type display device according to (10), wherein the intake port of the third fan is arranged on the side opposite to the stacked first fan and the second fan. (12) The projection type display device according to (10) or (11), wherein the intake port of the third fan is spatially connected to the heat exchanger via a duct. (13) Further having a housing having a double structure surrounding the cooling portion, The housing is A first housing surrounding the first fan, the second fan, and the third fan, One of the above (10) to (12), which comprises the first fan, the second fan, the third fan, and a second housing surrounding the image forming optical system.
- the image forming optical system has a polarizing plate and has a polarizing plate.
- the projection type display device according to any one of (1) to (13), wherein the cooling air is blown toward the polarizing plate.
- the fan is a sirocco fan or a centrifugal fan.
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Abstract
Description
1.実施の形態(冷却部を構成するファンと熱交換器とが正対配置された投射型表示装置の例)
1-1.投射型表示装置の構成
1-2.冷却部の構成
1-3.作用・効果
2.変形例
図1は、本開示の一実施の形態に係る投射型表示装置(投射型表示装置1)の概略構成の一例を表したものである。投射型表示装置1は、壁面等のスクリーン1000(被投射面)に対して映像(映像光)を投影する投射型の表示装置である。投射型表示装置1は、例えば、光源部100と、光源部100から射出される光(照明光L)を変調する空間変調素子(液晶パネル231R,231G,231B)を備えた画像形成光学系200と、液晶パネル231R,231G,231Bそれぞれからの光(映像光)を投射する投射光学系300とを備えたものである。投射型表示装置1は、さらに、画像形成光学系200へ冷却風を送風するファン(例えば、ファン410、図3参照)を有する冷却部400と、熱交換器500とを有し、本実施の形態では、例えばファン410が、熱交換器500と正対配置されている。
投射型表示装置1は、例えば、反射型の液晶パネル(Liquid Crystal Display:LCD)により光変調を行う反射型3LCD方式の投射型表示装置である。投射型表示装置1は、上記のように、光源部100、画像形成光学系200、投射光学系300、冷却部400および熱交換器500を有し、冷却部400を構成する、例えばファン410と、熱交換器500とが正対配置されている。投射型表示装置1は、さらに、電源部600と、信号処理部700と、放熱部800とを有しており、これら光源部100、画像形成光学系200、投射光学系300、冷却部400、熱交換器500、電源部600、信号処理部700および放熱部800は、筐体900に収容されている。
図3は、図1に示した冷却部400を構成する複数のファン(ファン410,420,430)および熱交換器500の構成の一例を表したものである。図4は、図3に示したI-I線における冷却部400および熱交換器500の断面構成を表したものであり、図5は、図3に示したII-II線における冷却部400および熱交換器500の断面構成を表したものである。
本実施の形態の投射型表示装置1は、画像形成光学系200の、例えば反射型偏光板221R,221G,221Bへ冷却風を送風するファン(ファン410,420,430)と、熱交換器500とを正対配置することにより、ファン410,420,430から生じる騒音を熱交換器500によって遮音するようにした。以下、これについて説明する。
以上、実施の形態を挙げて説明したが、本技術は上記実施の形態に限定されるものではなく、種々変形が可能である。例えば、上記実施の形態では、吸気口(例えば、吸気口413,423,433)が、直接または他のファン(例えばファン410)を間にして熱交換器500と正対配置された例や、ダクトを介して空間的に接続されている例を示したが、これに限らない。例えば図7に示したように、例えば熱交換器500の上方に、例えばZ軸方向に沿ってファン440を配置し、その吸気口443と筐体910とを空間的に接続するダクト911を設け、このダクト911の開口部911Hが、熱交換器500と正対配置されていてもよい。あるいは、例えば図8に示したように、例えば吸気口453を有する面とは反対側の面が熱交換器500と正対するようにファン540を配置し、筐体452の側面部と筐体910とによって構成される開口部912Hが熱交換器500と正対配置されていてもよい。即ち、各ファンの吸気口は、空間的に熱交換器500と正対していればよく、必ずしも熱交換器500と直接正対配置されていなくても上記実施の形態と同様の効果を得ることができる。これら開口部911H,912Hが、本開示の「第2の吸気口」の一具体例に相当する。
(1)
光源部と、
光源部から射出される光を変調する空間変調素子を備えた画像形成光学系と、
前記空間変調素子からの光を投射する投射光学系と、
前記画像形成光学系へ冷却風を送風するファンを有する冷却部と、
前記ファンと正対配置された熱交換器と
を備えた投射型表示装置。
(2)
前記ファンは、一方に吸気口を有する一対の平面部と、送風口を有する側面部とを有し、前記熱交換器に対して前記吸気口を有する平面部が正対配置されている、前記(1)に記載の投射型表示装置。
(3)
前記熱交換器は、複数のフィンが所定の間隔で立設された構造を有し、
前記ファンの前記吸気口を有する前記平面部は、前記複数のフィンが立設されてなる面に対して正対配置されている、前記(2)に記載の投射型表示装置。
(4)
前記ファンは、一方に第1の吸気口を有する一対の平面部と、送風口を有する側面部と、前記第1の吸気口と空間的に接続された第2の吸気口を形成するダクトとを有し、
前記第2の吸気口が前記熱交換器に対して正対配置されている、前記(1)に記載の投射型表示装置。
(5)
前記冷却部を囲む筐体をさらに有し、
前記ファンは、一方に第1の吸気口を有する一対の平面部と、送風口を有する側面部と、前記側面部と前記筐体とによって構成される第2の吸気口とを有し、
前記第2の吸気口が前記熱交換器に対して正対配置されている、前記(1)に記載の投射型表示装置。
(6)
前記熱交換器は、複数のフィンが所定の間隔で立設された構造を有し、
前記ファンの前記第2の吸気口は、前記複数のフィンが立設されてなる面に対して正対配置されている、前記(4)または(5)に記載の投射型表示装置。
(7)
前記冷却部を囲む2重構造を有する筐体をさらに有する、前記(1)乃至(6)のうちのいずれか1つに記載の投射型表示装置。
(8)
前記冷却部は、第1のファンおよび第2のファンを有し、
前記第1のファンおよび前記第2のファンは、前記熱交換器の上方に積層されている、前記(1)乃至(6)のうちのいずれか1つに記載の投射型表示装置。
(9)
前記第1のファンの吸気口は、前記熱交換器と正対し、
前記第2のファンの吸気口は、前記第1のファンを間にして前記熱交換器と正対している、前記(8)に記載の投射型表示装置。
(10)
前記冷却部はさらに第3のファンを有し、
前記第3のファンは、前記第1のファンおよび前記第2のファンの積層方向に沿って配置されている、前記(8)または(9)に記載の投射型表示装置。
(11)
前記第3のファンの吸気口は、積層された前記第1のファンおよび前記第2のファンとは反対側に配置されている、前記(10)に記載の投射型表示装置。
(12)
前記第3のファンの吸気口は、ダクトを介して前記熱交換器と空間的に接続されている、前記(10)または(11)に記載の投射型表示装置。
(13)
前記冷却部を囲む2重構造を有する筐体をさらに有し、
前記筐体は、
前記第1のファン、前記第2のファンおよび前記第3のファンを囲む第1の筐体と、
前記第1のファン、前記第2のファンおよび前記第3のファンと共に、前記画像形成光学系を囲む第2の筐体とからなる、前記(10)乃至(12)のうちのいずれか1つに記載の投射型表示装置。
(14)
前記画像形成光学系は偏光板を有し、
前記冷却風は、前記偏光板へ向けて送風される、前記(1)乃至(13)のうちのいずれか1つに記載の投射型表示装置。
(15)
前記ファンは、シロッコファンまたは遠心ファンである、前記(1)乃至(14)のうちのいずれか1つに記載の投射型表示装置。
Claims (15)
- 光源部と、
光源部から射出される光を変調する空間変調素子を備えた画像形成光学系と、
前記空間変調素子からの光を投射する投射光学系と、
前記画像形成光学系へ冷却風を送風するファンを有する冷却部と、
前記ファンと正対配置された熱交換器と
を備えた投射型表示装置。 - 前記ファンは、一方に吸気口を有する一対の平面部と、送風口を有する側面部とを有し、前記熱交換器に対して前記吸気口を有する平面部が正対配置されている、請求項1に記載の投射型表示装置。
- 前記熱交換器は、複数のフィンが所定の間隔で立設された構造を有し、
前記ファンの前記吸気口を有する前記平面部は、前記複数のフィンが立設されてなる面に対して正対配置されている、請求項2に記載の投射型表示装置。 - 前記ファンは、一方に第1の吸気口を有する一対の平面部と、送風口を有する側面部と、前記第1の吸気口と空間的に接続された第2の吸気口を形成するダクトとを有し、
前記第2の吸気口が前記熱交換器に対して正対配置されている、請求項1に記載の投射型表示装置。 - 前記冷却部を囲む筐体をさらに有し、
前記ファンは、一方に第1の吸気口を有する一対の平面部と、送風口を有する側面部と、前記側面部と前記筐体とによって構成される第2の吸気口とを有し、
前記第2の吸気口が前記熱交換器に対して正対配置されている、請求項1に記載の投射型表示装置。 - 前記熱交換器は、複数のフィンが所定の間隔で立設された構造を有し、
前記ファンの前記第2の吸気口は、前記複数のフィンが立設されてなる面に対して正対配置されている、請求項4に記載の投射型表示装置。 - 前記冷却部を囲む2重構造を有する筐体をさらに有する、請求項1に記載の投射型表示装置。
- 前記冷却部は、第1のファンおよび第2のファンを有し、
前記第1のファンおよび前記第2のファンは、前記熱交換器の上方に積層されている、請求項1に記載の投射型表示装置。 - 前記第1のファンの吸気口は、前記熱交換器と正対し、
前記第2のファンの吸気口は、前記第1のファンを間にして前記熱交換器と正対している、請求項8に記載の投射型表示装置。 - 前記冷却部はさらに第3のファンを有し、
前記第3のファンは、前記第1のファンおよび前記第2のファンの積層方向に沿って配置されている、請求項8に記載の投射型表示装置。 - 前記第3のファンの吸気口は、積層された前記第1のファンおよび前記第2のファンとは反対側に配置されている、請求項10に記載の投射型表示装置。
- 前記第3のファンの吸気口は、ダクトを介して前記熱交換器と空間的に接続されている、請求項10に記載の投射型表示装置。
- 前記冷却部を囲む2重構造を有する筐体をさらに有し、
前記筐体は、
前記第1のファン、前記第2のファンおよび前記第3のファンを囲む第1の筐体と、
前記第1のファン、前記第2のファンおよび前記第3のファンと共に、前記画像形成光学系を囲む第2の筐体とからなる、請求項10に記載の投射型表示装置。 - 前記画像形成光学系は偏光板を有し、
前記冷却風は、前記偏光板へ向けて送風される、請求項1に記載の投射型表示装置。 - 前記ファンは、シロッコファンまたは遠心ファンである、請求項1に記載の投射型表示装置。
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