WO2004072726A1 - 光学部品用筐体、及びプロジェクタ - Google Patents
光学部品用筐体、及びプロジェクタ Download PDFInfo
- Publication number
- WO2004072726A1 WO2004072726A1 PCT/JP2004/001341 JP2004001341W WO2004072726A1 WO 2004072726 A1 WO2004072726 A1 WO 2004072726A1 JP 2004001341 W JP2004001341 W JP 2004001341W WO 2004072726 A1 WO2004072726 A1 WO 2004072726A1
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- WO
- WIPO (PCT)
- Prior art keywords
- optical component
- flow path
- cooling fluid
- rib
- light
- Prior art date
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Classifications
-
- 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
-
- 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
- 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 invention relates to an optical component housing and a projector.
- the present invention can be applied to a projector widely used for multimedia presentations at conferences, conferences, exhibitions, and the like.
- the luminous flux emitted from the light source is made uniform by the illumination optical system in the illuminated surface, and separated into red, green, and blue light by the color separation optical system, and light modulation is performed for each color light.
- a projector which modulates light by a device, combines respective color lights with a color combining optical system, and enlarges and projects a color image from a projection optical system.
- the optical system of such a projector includes a plurality of optical components.
- the illumination optical system includes an integrator lens that splits the light beam emitted from the light source into a plurality of partial light beams and a condenser lens that condenses the partial light beams.
- the color combining optical system uses a cross dichroic prism. (Color combining optical device).
- these optical components are used for a metal optical component called a light guide. It is housed in a housing, and heat generated from each optical component is transmitted to the bottom (outer surface) of the optical component housing.
- cooling air is introduced into the optical component housing from the upper surface side of the optical component housing to cool the light modulation device and the like.
- this cooling air is sent to the bottom part to cool it.
- cooling air is introduced to the bottom side of the optical component housing.
- a part is introduced into the inside of the housing and used for cooling an optical modulator or the like, and another part of the air is ventilated along the bottom to cool the bottom. Disclosure of the invention
- An object of the present invention is to provide an optical component housing and a projector that can sufficiently cool the light modulation device and other components, for example, the bottom portion of the optical component housing. .
- the first optical component casing of the present invention accommodates an optical component including a plurality of light modulators that modulate a plurality of color lights for each color light according to image information, and emits the optical component from a light source.
- a lip forming a duct for guiding a cooling fluid for cooling the device, and a hole formed on the outer surface portion for guiding the cooling fluid from the duct to the light modulator inside the optical component housing.
- the rib defines a first flow path that guides the cooling fluid introduced from the cooling fluid introduction opening of the duct to a light modulator that modulates a color light having a low light intensity among the plurality of color lights. Ribs and cooling flow introduced from said openings
- a rib defining a second flow path for guiding the body to another light modulation device, wherein the rib defining the first flow path and the rib defining the second flow path are such that the first flow path is used for the optical It is formed so as to surround the second flow path along the outer surface of the component housing, and the cooling fluid passing through the first flow path cools the outer surface.
- the optical component may be in direct contact with the outer surface, or may be indirectly in contact with the outer surface. That is, any structure may be used as long as the heat of the optical component is transmitted to the outer surface.
- the cooling fluid that passes through the first flow path cools the outer surface of the optical component housing where the optical components come into contact and the heat of the optical component is transferred, and then cools the optical component housing through holes formed in the outer surface. It enters the body and cools the light modulator.
- the cooling since the outer surface is directly cooled by the cooling fluid passing through the first flow path, the cooling can be performed efficiently. This makes it easier for the heat of the optical component to be transferred to the outer surface, thereby improving the heat radiation efficiency of the optical component.
- the light modulator Normally, the light modulator generates heat to absorb a part of the light to be modulated, but the light modulator cooled by the cooling fluid passing through the first flow path has a low light intensity. Since it modulates light, the amount of heat generated is lower than that of a light modulator that modulates other color light. Therefore, even the cooling fluid after cooling the outer surface can be sufficiently cooled.
- the color light with low light intensity becomes red light.
- a halogen lamp or some other metal halide lamp is used as a light source, the color light having a low light intensity becomes blue light.
- the light intensity in the present application indicates an energy obtained by an integral value for each wavelength region of each color light of the light emitted from the light source.
- the light modulator cooled by the cooling fluid in the first flow path after cooling the screen portion of the optical component casing is a light modulator into which low-energy color light in the wavelength range of each color light enters, that is, This is a light modulation device that has a low amount of heat given from incident light.
- the cooling fluid passing through the second flow path enters the housing ⁇ ⁇ through the hole formed in the outer surface without cooling the outer surface of the optical component housing, and the other light modulation device is blocked. Cooling.
- the cooling fluid passing through the second flow path does not exchange heat with the outer surface, Since the other light modulation device is cooled by the lower temperature cooling fluid, the other light modulation device can be efficiently cooled.
- the duct is formed on the outer surface of the optical component body, the number of members can be reduced as compared with the case where the duct is separate from the optical component housing. .
- the other light modulation device includes a plurality of modulation devices, and a rib that partitions the second flow path cools the plurality of other light modulation devices to the plurality of other light modulation devices. It defines a first flow path connecting the respective holes for guiding the fluid in series, and the hole directly connected to the opening has a light intensity of the plurality of color lights of the plurality of other light modulation devices.
- the hole is a hole for guiding the cooling fluid to a light modulator for modulating intense color light.
- the cooling fluid passing through the second flow path is first introduced into the hole corresponding to the light modulator that modulates the color light having the higher light intensity among the plurality of color lights among the plurality of other light modulators. Then, the remaining cooling fluid is introduced into the holes corresponding to the other light modulation devices.
- a light modulator that modulates color light with high light intensity generates a large amount of heat, so even if the air flow is small, sufficient air is supplied to the holes corresponding to the light modulator that modulates color light with high light intensity.
- the light modulator that modulates the color light with high light intensity can be cooled, and the cooling efficiency can be improved.
- the first optical component casing of the present invention wherein the first flow path is an outer flow path that guides the cooling fluid along an outer periphery of an outer surface of the optical component case; It is preferable that an inner flow path for guiding the cooling fluid be provided between the two flow paths.
- the cooling fluid in the first flow path can surely cool the outer surface by guiding the cooling fluid to the outer flow path and the inner flow path. It can be cooled efficiently.
- the first optical component casing of the present invention includes a fan that supplies the cooling fluid to the duct. According to this, a sufficient amount of cooling air can be sent into the duct by the fan. Thereby, the outer surface portion, the light modulation device, and the like can be reliably cooled. Further, in the configuration of the present invention, since the outer surface portion and the light modulation device can be efficiently cooled, the number of rotations of the cooling fluid supply fan can be reduced, and noise due to the rotation of the fan can be reduced. Furthermore, since the cooling efficiency of the outer surface and the optical modulator is high, even low-performance fans can be sufficiently cooled, so that adopting a low-cost fan can reduce the cost of the cooling device. .
- the fan may include a first fan attached to a rib forming the first flow path, and a second fan attached to a lip defining the second flow path.
- a fan is provided.
- the first optical component casing of the present invention includes a fan that supplies the cooling fluid to the duct, and a rib that partitions the second flow path includes the other light modulation formed on the outer surface.
- a plurality of second flow paths connected to the holes for guiding the cooling fluid to the device, wherein the plurality of openings provided in the first flow paths for introducing the cooling fluid; It is preferable that the fan is connected to the same fan as the opening for introducing the cooling fluid provided in at least one of the second passages.
- a fan may be connected to each of the flow paths, but a large number of fans are required, which increases the cost. Also, a large space for installing many fans is required.
- the opening provided in the first flow path and the opening provided in the second flow path are connected to the same fan. Because of this, it is possible to suppress an increase in the number of fans. Also, there is no need to secure a large space for installing fans.
- a rectifying plate for regulating a flow of a cooling fluid is arranged in at least one of the flow paths of the duct.
- the flow velocity of the cooling fluid flowing along the outer surface of the optical / optical component housing is equalized, and / or a cross section perpendicular to the flow direction is provided. And the flow velocity can be equalized. This allows the cooling fluid to flow uniformly and efficiently to the outer surface portion of the optical component casing, thereby increasing the cooling efficiency of the optical component casing and the light modulator.
- the second optical component casing of the present invention accommodates an optical component including a plurality of light modulators that modulate a plurality of color lights in accordance with image information for each color light, and emits the optical component from a light source.
- An optical component housing disposed at a predetermined position on the illumination optical axis of the luminous flux, wherein a duct for guiding a cooling fluid for cooling the light modulator contacts the optical component of the optical component housing.
- a heat conductive outer surface having a hole for guiding a cooling fluid to the light modulation device, wherein the duct has an opening for introducing a cooling fluid, and a cooling fluid introduced from the opening.
- a rib that divides a first flow path leading to a light modulator that modulates the color light having a low light intensity among the plurality of color lights; and a second flow path that guides a cooling fluid introduced from the opening to another light modulation apparatus.
- the optical component casing of the present invention can be configured by attaching the duct to the outer surface of the conventional optical component casing. Since there is no need to manufacture a new optical component casing, costs can be reduced. It is preferable that the second optical component casing of the present invention includes a fan that supplies the cooling fluid to the duct.
- a sufficient amount of cooling air can be sent into the duct by the fan.
- the outer surface portion, the light modulation device, and the like can be reliably cooled.
- the number of rotations of the cooling fluid supply fan can be reduced, and noise due to the rotation of the fan can be reduced.
- the cooling efficiency of the outer surface and the light modulator is high, even a fan with low performance can be sufficiently cooled, so that the cost of the cooling device can be reduced by using a low-cost fan.
- the rib for partitioning the second flow path includes a plurality of second holes formed in the outer surface for guiding a cooling fluid to another light modulation device.
- the flow path is formed so as to be connected, the opening for cooling fluid introduction provided in the first flow path, and provided in at least one second flow path of the plurality of second flow paths.
- the opening for introducing the cooling fluid is connected to the same fan.
- a fan may be connected to each of the flow paths, but a large number of fans are required, which increases the cost. Also, a large space for installing many fans is required.
- the opening provided in the first flow path and the opening provided in the second flow path are connected to the same fan, so that an increase in the number of fans can be suppressed. it can. Also, there is no need to secure a large space for installing fans.
- the rib has a rib at a part of an outer peripheral portion of the hole, the rib blocking a part of the cooling fluid and leading to the hole. According to this, a part of the flow of the cooling fluid flowing around the hole formed in the outer surface portion can be guided to the inside of the hole, so that the optical modulation device can be cooled more efficiently.
- the optical component includes an optical component constituting an illumination optical system for illuminating an image forming area of the light modulation device substantially uniformly, and the first flow path is provided. It is preferable that a part of the cooling fluid passing through cools the optical components constituting the illumination optical system.
- the optical components constituting the illumination optical system are cooled by a part of the cooling fluid passing through the first flow path, a new optical component constituting the illumination optical system is cooled. There is no need to employ a cooling structure.
- the amount of heat generated is lower than that of the light modulator which modulates other color light.
- the light modulator can be sufficiently cooled.
- a flow straightening plate for adjusting a flow of the cooling fluid is arranged in at least one of the flow paths of the duct. According to this, since the rectifying plate is disposed in the flow path, the flow velocity of the cooling fluid flowing along the outer surface of the optical / optical component casing is equalized, and the cross section perpendicular to the flow direction is obtained. And the flow velocity can be equalized. This allows the cooling fluid to flow uniformly and efficiently to the outer surface portion of the optical component casing, thereby increasing the cooling efficiency of the optical component casing and the light modulator.
- a projector includes: an illumination optical system; an optical component including a plurality of light modulators that modulate a plurality of color lights in accordance with image information for each color light; A projection optical system, an optical component housing that houses the optical component and arranges the optical component at a predetermined position on an illumination optical axis of a light beam emitted from the illumination optical system, the illumination optical system, and the optical An external housing for accommodating the component housing A projector for providing a cooling fluid for cooling the plurality of light modulation devices; and a fan for supplying the cooling fluid to the duct, wherein the optical component housing includes: An opening for introducing a cooling fluid from the fan; and the cooling fluid from the opening to the first light modulator for modulating low-intensity color light of the plurality of color lights from the opening.
- a first flow path that guides the cooling fluid from the opening to another light modulation device, and the first flow path extends along the outer surface of the optical component housing. In particular, it is formed so as to surround the second flow path.
- the projector of the present invention includes the first optical component casing or the second optical component casing described above.
- the first optical component casing or the second optical component casing is provided.
- An effect similar to that of the body can be achieved.
- the projector according to the present invention includes a housing that houses the illumination optical system and the housing for the optical component, and the housing includes the light modulation unit that is located at a position corresponding to an outer surface of the housing for the optical component.
- a rib that forms a duct for guiding a cooling fluid for cooling the device is formed, the duct includes an opening for introducing a cooling fluid, and the rib transmits the cooling fluid introduced from the opening to the plurality of cooling fluids.
- a rib that partitions the first flow path and a rib that partitions the second flow path are formed along the outer surface so that the first flow path surrounds the second flow path.
- the cooling fluid passing through the first flow path of the duct is It is preferable to cool the outer surface of the optical component casing.
- the duct is formed at a position corresponding to the outer surface of the optical component housing of the housing, and the duct is not formed at the outer surface of the optical component housing. Therefore, the optical component housing conventionally used can be used.
- the projector according to the present invention includes a fan for supplying the cooling fluid to the duct.
- the cooling fluid can be positively flown into the duct by the fan, and the cooling efficiency of the outer surface portion and the light modulation device can be improved.
- the outer surface portion and the light modulation device can be efficiently cooled, the number of rotations of the cooling fluid supply fan can be reduced, and noise due to the rotation of the fan can be reduced.
- the rib that divides the second flow path may be configured such that a plurality of second flow paths are connected to the hole for guiding a cooling fluid to another light modulation device formed on the outer surface portion.
- An opening for cooling fluid introduction provided in the first flow path; and an opening for cooling fluid introduction provided in at least one second flow path of the plurality of second flow paths. are preferably connected to the same fan.
- a fan may be connected to each of the flow paths, but a large number of fans are required, which increases the cost. Also, a large space for installing many fans is required.
- the opening provided in the first flow path and the opening provided in the second flow path are connected to the same fan. Because of this, it is possible to suppress an increase in the number of fans. Also, there is no need to secure a large space for installing fans.
- the rib includes, at a part of an outer peripheral portion of the hole, a rib that dams part of the cooling fluid and guides the cooling fluid to the hole.
- a flow regulating plate that regulates a flow of a cooling fluid is disposed in at least one of the flow paths of the duct.
- the flow straightening plate is arranged in the flow path, the flow velocity of the cooling fluid flowing along the outer surface of the optical / optical component housing is equalized, and the cross section perpendicular to z or the flow direction is provided. And the flow velocity can be equalized.
- the cooling fluid can flow uniformly and efficiently to the outer surface of the optical component casing, and the cooling efficiency of the optical component casing and the optical modulator can be increased.
- FIG. 1 is an overall perspective view of a projector according to a first embodiment as viewed from above.
- FIG. 2 is a diagram illustrating an internal structure of the projector according to the embodiment.
- FIG. 3 is a schematic diagram illustrating an optical system of the projector according to the embodiment.
- FIG. 4 is a perspective view of an optical device main body.
- FIG. 5 is an angle perspective view of the optical device main body.
- FIG. 6 is a perspective view showing an optical unit.
- FIG. 7 is a plan view showing the inside of the optical cut.
- FIG. 8 is a perspective view of the optical component casing as viewed from the bottom side.
- FIG. 9 is a plan view of the optical component casing viewed from the bottom side.
- FIG. 10 is a cross-sectional view showing a flow path of a cooling system of the projector.
- FIG. 11 is a plan view showing an optical component housing according to a second embodiment of the present invention.
- FIG. 12 is a plan view showing an optical component housing according to a third embodiment of the present invention.
- FIG. 13 is a plan view showing an optical component housing according to a fourth embodiment of the present invention.
- FIG. 14 is a perspective view showing an optical component housing and a duct according to a fifth embodiment of the present invention, as viewed from above.
- FIG. 15 is a perspective view showing the optical component casing and the duct according to the fifth embodiment of the present invention as viewed from below.
- FIG. 16 is a perspective view showing a duct according to a fifth embodiment of the present invention.
- FIG. 17 is a plan view showing a duct according to a fifth embodiment of the present invention.
- FIG. 18 is a plan view showing a duct according to a sixth embodiment of the present invention.
- FIG. 19 is a plan view showing an optical component casing according to a modification of the present invention.
- FIG. 20 is a plan view showing an optical component housing according to a modification of the present invention.
- FIG. 21 is a perspective view showing an outer case according to a modification of the present invention.
- FIG. 1 is an overall perspective view of the projector 1 according to the first embodiment of the present invention as viewed from above, and FIG. 2 is an exploded perspective view of the projector shown in FIG. 1 with the upper case 21 removed.
- the projector 1 has an outer case (housing) 2 that has a substantially rectangular parallelepiped shape, a cooling unit 3 that cools the heat staying in the projector 1, and an image that optically processes the light flux emitted from the light source. And an optical cut 4 for forming an optical image corresponding to the information.
- a power supply block / lamp drive circuit and the like are housed in a space other than the optical unit 4 in the outer case 2.
- the outer casing 2 are each comprised of metal, the top surface of the projector 1, the front, the upper case 2 1 constituting each contact and sides, a lower case 2 2 constituting the bottom surface of the projector 1, a side surface, and the rear, respectively It is composed of this These cases 21 and 22 are fixed to each other with screws.
- the upper case 21 is formed by an upper surface portion 211, side surfaces 211 provided around the upper surface portion 211, a rear portion 211 and a front portion 214.
- An exhaust port 211A for discharging the air heated inside the projector 1 by the cooling unit 3 is provided on the side surface portion 212 (the right side surface when viewed from the front).
- the rear part 2 13 is provided with a connection part for computer connection, and various equipment connection terminals such as a video input terminal and an audio equipment connection terminal.
- An interface board on which a signal processing circuit for performing signal processing of a video signal or the like is mounted is arranged inside the 213.
- a cutout portion 2 14 A is formed in the front portion 2 14, and a circular opening 2 A is formed in a state combined with the lower case 2 2.
- a part of the optical unit 4 disposed inside the mounting case 2 is exposed to the outside.
- the optical image formed by the optical unit 4 is emitted through the opening 2A, and the image is displayed on the screen.
- the lower case 22 is formed of a bottom surface portion 22 1, side portions 22 2 provided around the bottom portion 22 1, a back portion 22 3, and a front portion 22 4.
- an opening for attaching and detaching a light source device which will be described later, is formed in the bottom part 221, although not shown, and the opening has a lamp power.
- the bar is fitted and detachably provided.
- an intake port 221A is formed in the bottom part 221 through the cooling unit 3 to take in cooling air from outside (see Fig. 10).
- a cutout portion 224A is formed in the front portion 222, and in a state combined with the upper case 21, a circular opening 2A is formed continuously with the cutout portion 214A described above. Form.
- the cooling unit 3 sends cooling air to a cooling channel formed in a part of the projector 1 to cool heat generated in the projector 1.
- Cooling unit Numeral 3 is located on the side of the projection lens 46 of the optical unit 4, and draws cooling air from the air intake port 2 21 A (see Fig. 10) formed in the bottom part 22 1 of the lower case 22.
- the air intake fan 31 is located near the optical unit 4 11 and the light source unit 4 11 of the optical unit 4, and draws air inside the optical unit 4 and the projector 1 to form on the side surface 2 12 of the upper case 21.
- a sirocco fan 32 that discharges warmed air from the exhaust port 2 12 A.
- the optical cut 4 is a unit that optically processes a light beam emitted from the light source device 411 to form an optical image corresponding to image information, and includes a plurality of optical units that form an optical system described later.
- An optical component and an optical component housing 5A for accommodating them are provided.
- the optical component housing 5A extends from the right side surface 2 2 2 of the lower case 2 2 along the rear surface 2 2 3 to the front side 2 2 4 along the left side surface 2 2 2. And an extended L-shape.
- the detailed structure of the optical component housing 5A will be described later.
- the optical unit 4 is supplied with electric power through a power cable, and is used to supply the supplied electric power to the light source device 4 11 of the optical unit 4. It is electrically connected to the device.
- each liquid crystal panel 4 41 R, 44 1 G, A control board 50 for controlling 4 4 1 B is arranged.
- optical system of the optical unit 4 will be described with reference to the schematic diagram of FIG.
- the optical unit 4 includes an integrator illumination optical system 41, a color separation optical system 42, a relay optical system 43, an optical device 44, and a projection lens 46.
- the integrator illumination optical system 41 is composed of three liquid crystal panels 4 4 1 constituting the optical device 4 4 (liquid crystal panels 4 4 1 R, 4 4 1 G, 4 4 1 B for each of red, green and blue color lights).
- the light source device 411 is a light source device that is a light source that emits radial rays. Pump 4 16, an ellipsoidal mirror 4 17 that reflects the emitted light emitted from the light source and the lamp 4 16, and a light emitted from the light source lamp 4 16 and reflected by the elliptical mirror 4 17. And a collimating concave lens 411A for making parallel light.
- an ultra-high pressure mercury lamp is used as the light source lamp 4 16.
- a UV filter (not shown) is provided on the plane portion of the parallelizing concave lens 411A.
- a parabolic mirror may be used instead of the elliptical mirror 4 17 and the parallelizing concave lens 4 11 A.
- first lens array 4 12, the second lens array 4 13, and the polarization conversion optical element 4 14 are integrally combined and installed and fixed in the optical component housing 5 A.
- the first lens array 4 12 has a configuration in which small lenses having a substantially rectangular outline when viewed from the optical axis direction are arranged in a matrix. Each small lens divides the light beam emitted from the light source and the lamp 416 into a plurality of partial light beams.
- the contour shape of each small lens is set to be substantially similar to the shape of the image forming area of the liquid crystal panel 441.
- the second lens array 4 13 has substantially the same configuration as the first lens array 4 12, and has a configuration in which small lenses are arranged in a matrix.
- the second lens array 413 has a function of forming an image of each small lens of the first lens array 412 on the liquid crystal panel 441 together with the superimposing lens 415.
- the polarization conversion optical element 414 is disposed between the second lens array 413 and the superimposing lens 415, and is unitized integrally with the second lens array 413. Such a polarization conversion optical element 4 14 converts the light from the second lens array 4 13
- the light is converted into one type of polarized light, thereby increasing the light use efficiency of the optical device 44.
- each part of the light that has been converted into one type of polarized light by the polarization conversion optical element 4 14 is finally converted by the superposition lens 4 15 into the liquid crystal panels 4 4 1 R and 4 4 1 G of the optical device 4 4.
- 4 4 1 B are almost superimposed on B.
- Liquid crystal panel that modulates polarized light Since only one type of polarized light can be used in a projector using a projector, almost half of the light from the light source lamp 416 that emits randomly polarized light cannot be used.
- the polarization conversion optical element 414 the light emitted from the light source lamp 416 is converted into almost one kind of polarized light, and the light use efficiency of the optical device 44 is increased.
- a polarization conversion optical element 4 14 is introduced in, for example, Japanese Patent Application Laid-Open No. 8-304739.
- the color separation optical system 4 2 has two dichroic mirrors 4 2 1 and 4 2 2 and a reflection mirror 4 2 3.
- the dichroic mirrors 4 2 1 and 4 2 2 enable the integrator illumination optical system 4 2. It has the function of separating the multiple partial light beams emitted from 1 into three color lights of red, green and blue.
- the relay optical system 43 includes an entrance lens 431, a relay lens 43, and reflection mirrors 43, 43, and 43.
- the color light and red light separated by the color separation optical system 42 are crystallized. It has the function of leading to panel 4 4 1 R.
- the dichroic mirror 4 21 of the color separation optical system 42 reflects the blue light component of the light beam emitted from the integrator illumination optical system 41 and transmits the red light component and the green light component. .
- the blue light reflected by the dichroic mirror 421 is reflected by the reflecting mirror 423 and reaches the liquid crystal panel 441 B for blue through the field lens 418.
- This field lens 418 converts each partial light beam emitted from the second lens array 413 into a light beam parallel to its central axis (principal ray). The same applies to the field lenses 418 provided on the light incident side of the other liquid crystal panels 441 G and 441 R.
- the green light is reflected by the dichroic mirror 422, passes through the field lens 418, and is a liquid crystal panel for green.
- the red light passes through the dichroic mirror 422, passes through the relay optical system 43, and further passes through the Fino red lens 418 to reach the liquid crystal panel 441R for red light.
- the relay optical system 43 is used for red light. The reason is that the light path length of the red light is longer than the light path lengths of the other color lights, so that a reduction in light use efficiency due to light divergence or the like is prevented. That is, this is for transmitting the partial light beam incident on the incident side lens 431 to the field lens 418 as it is.
- relay optical system 43 is configured to transmit red light among the three color lights
- the optical device 44 includes three input-side polarizers 442 on which the respective color lights separated by the color separation optical system 42 are incident, and a liquid crystal panel as a light modulator disposed downstream of each of the incident-side polarizers 442. 441 R, 441 G, 441 B, the exit-side polarizer 443 disposed after the liquid crystal panels 441 R, 441 G, 441 B, and the cross dichroic prism 444 as a color combining optical system (color combining optical device) ).
- the liquid crystal panels 441 R, 441 G, and 441 B use, for example, a polysilicon TFT as a switching element, and each color light separated by the color separation optical system 42 is supplied to these three liquid crystal panels 441 R, 441 B.
- G, 441 B, the incident side polarizing plate 442 and the exit side polarizing plate 443 modulate according to image information to form an optical image.
- the liquid crystal panels 441 R, 441 G, and 441 B include a driving substrate having pixel electrodes in which TFT switching elements are arranged in a matrix, and a voltage is applied by the switching elements. And a counter substrate provided with a counter electrode corresponding to the electrode.
- the incident-side polarizing plate 442 transmits only the polarized light of a certain direction and absorbs other light beams among the respective color lights separated by the color separation optical system 42.
- the polarizing film is formed on a substrate such as sapphire glass. Is affixed. Alternatively, a polarizing film may be attached to the field lens 418 without using a substrate.
- the exit-side polarizing plate 443 is also configured in substantially the same manner as the incident-side polarizing plate 442, and is obtained by attaching a polarizing film 443A to a substrate 443B such as sapphire glass (see FIG. 5).
- the exit side polarizing plate 443 is a liquid crystal panel 441 (441 R, 441 G, 441 B) Among the light beams emitted from the force, only the polarized light in a predetermined direction is transmitted, and the other light beams are absorbed. Note that a polarizing film may be attached to the cross dichroic prism 444 without using a substrate.
- the incident side polarizing plate 442 and the exit side polarizing plate 443 are set such that their polarization axes are orthogonal to each other.
- the cross dichroic prism 444 forms a color image by combining the images modulated for each color light emitted from the three liquid crystal panels 441 R, 441 G, and 441 B. It is.
- a dielectric multilayer film that reflects red light and a dielectric multilayer film that reflects blue light are formed in an approximately X shape along the interface between the four right-angle prisms. Then, these three colored lights are combined by these dielectric multilayer films. Then, the color image synthesized by the prisms 4 4 4 is emitted from the projection lens 46 and is enlarged and projected on the screen.
- the liquid crystal panel 441, the emission-side polarizing plate 443, and the cross dichroic prism 4444 described above are configured as an optical device body 45 integrally formed.
- the optical device main body 45 has a pedestal 4 45 in addition to the above-described cross dichroic prism 4 44, the liquid crystal panel 4 41, and the exit side polarizing plate 4 4 3. It has a frame 446, a heat conduction plate 444, and a spacer 449. In FIG. 4, the heat conducting plate 447 is omitted.
- the pedestal 4 45 fixes the optical device body 45 to the optical component housing 5A.
- the cross dichroic prism is fixed on both upper and lower surfaces of the 4 4 4.
- the pedestal 445 is made of aluminum having a high thermal conductivity, and its outer peripheral shape is substantially the same as that of the cross dichroic prism 444.
- the pedestal 445 is not limited to being made of aluminum, but is not limited to this.
- a material having a high thermal conductivity such as a magnesium alloy or copper, or sapphire, crystal, or fluorite It may be formed of a heat conductive resin or the like.
- the holding frame 4 4 6 has a concave receiving section 4 4 6 A for receiving the liquid crystal panel 4 4 1 Further, the holding frame 446 has an opening 4446C at a position corresponding to the panel surface of the stored liquid crystal panel 441, and a portion exposed by the opening 4446C. Is an image forming area. That is, each color light R, G, B is introduced into this portion of the liquid crystal panel 441, and an optical image is formed according to the image information.
- a slope 4446D is formed on the left and right edges of the light-emitting side end face of the holding frame 4446, and a spacer 449 is arranged to face the slope 4446D.
- the liquid crystal panel 441 has a driving substrate 441 A (for example, a substrate on which a plurality of linear electrodes, electrodes constituting pixels, and TFT elements electrically connected between the electrodes are formed). Liquid crystal is sealed between a counter substrate 441 C (for example, a substrate on which a common electrode is formed). Then, a control cable 441D extends from between the boards 441A and 441C. In addition, a light-transmitting emission-side dust-proof plate 44 1 E and an incident-side dust-proof plate 44 1 F are adhered to the surface of the substrate 44 1 A or 44 1 C.
- a driving substrate 441 A for example, a substrate on which a plurality of linear electrodes, electrodes constituting pixels, and TFT elements electrically connected between the electrodes are formed. Liquid crystal is sealed between a counter substrate 441 C (for example, a substrate on which a common electrode is formed). Then, a control cable 441D extends from between the boards 441A and 441C
- the emission-side dustproof plate 441E and the incident-side dustproof plate 441F are made of a plate having good thermal conductivity such as sapphire quartz.
- the dust-proof plates 4 4 1 E and 4 4 1 F are positioned on the liquid crystal panel 4 4 1 from the back focus position of the projection lens 4 6 to the panel surface of the liquid crystal panel 4 4 It has the function of shifting the position of, and making the dust adhered to the panel surface optically inconspicuous.
- the outer periphery of the emission-side dustproof plate 4 4 1 E and the entrance-side dustproof plate 4 4 1 F are formed with a border made of a thermally conductive silicone-based adhesive.
- the side surface of 6 A and the inner periphery of the opening 4464 C are bonded to the outer periphery of the emission-side dustproof plate 4411 E and the entrance-side dustproof plate 4411 F.
- the heat conducting plate 447 is a plate material made of aluminum and has an opening 447A corresponding to the opening 446C of the holding frame 446, and the light beam incident side surface of the holding frame 446. It is fixed closely to
- heat conductive plate 4 4 7, the liquid crystal panel 4 4 1 of light mounted in the holding frame 4 4 6 It extends laterally along the bundle incident surface, and is provided with a bent portion 447 B bent toward the liquid crystal panel 441 at both ends in the extending direction.
- the bent portion 447B is formed at a bending angle of less than 90 degrees as a predetermined angle, and the optical device main body 45 is attached to a predetermined position of the optical component housing 5A, and a heat conduction frame described later is formed. They are in contact with the walls 513B and 514B of 513 and 514, and bend at about 90 degrees. (See Figure 7 ')
- the heat conductive plate 447 is made of aluminum, but is not limited to this, and may be made of copper, magnesium, or an alloy containing these.
- the spacer 449 is interposed between the holding frame 446 and the substrate 443B of the emission-side polarizing plate 443, and adjusts the position of the holding frame 446.
- the spacer 449 has a substantially triangular cross section, and is formed of acryl or urethane. It is made of resins having heat insulating properties such as.
- the spacers 449 are arranged two in each holding frame 446 (a total of six) and abut the slope 446 D of the holding frame 446, and the holding frame 446 is moved by the movement of the spacer 449. Then, adjust the position of each LCD panel 441 R, 441 G, 441 B to the pack focus position from the projection lens 46.
- Fig. 6 shows the optical component housing 5A of the optical unit 4.
- the optical component housing 5A has the optical components 411A, 412 to 415, 418, 421 to 423, 431 to 434, 441 to 444, and 46 on the illumination optical axis of the light beam emitted from the light source lamp 416. At a predetermined position.
- the optical component housing 5A is made of a heat conductive material, for example, a metal such as an aluminum alloy, and has a light source lamp 416, an ellipsoidal mirror 417, and optical components 411A, 412 to 415, 418, and 421 to A lower light guide 51 for accommodating 423, 431 to 434, 441 to 444, and 46, and a plate-shaped upper light guide 52 'provided on the lower light guide 51 are provided.
- the lower light guide 51 is a light for accommodating the light source lamp 416 and the elliptical mirror 417.
- a source storage section 511 and an optical component storage section 512 for storing each of the optical components 411 A, 412 to 415, 418, 421 to 423, 431 to 434, 441 to 444, 46 are provided.
- the light source housing 511 will be described with reference to FIGS.
- the light source storage portion 5111 has a box shape in which an opening 5111B is formed on the bottom surface side and a rectangular opening 511A is formed on the inner surface.
- the light source housing 511 houses the lamp housing L housing the light source lamp 416 and the ellipsoidal mirror 417, and has a structure in which the lamp housing L is fitted through the opening 511B on the bottom side.
- the lamp housing L includes a base portion L1 attached to the light source storage portion 511, and a side portion L2 rising from the base portion L1.
- the side portion L2 has a different height dimension along the light beam emitted from the light source lamp 416, and the height dimension from the central portion of the elliptical mirror 417 to the front is from the bottom portion of the light source storage portion 51 1.
- the height of the elliptical mirror 417 is equal to the height of the upper surface, and the rear of the ellipsoidal mirror 417 is formed lower than the height.
- the opening 51 1A and the side L2 close the front part of the ellipsoidal mirror 417, and the rear part becomes the blow-through state. Has become.
- the closed state at the front part of the ellipsoidal mirror 417 can prevent the luminous flux emitted from the light source lamp 416 from leaking outside, and the blow-by state at the rear part allows the light source inside the light source storage part 511 to be inside.
- the structure is such that heat generated from the lamp 416 does not stay.
- optical component storage section 512 Next, the optical component storage section 512 will be described with reference to FIGS.
- the optical component storage unit 512 stores each of the optical components 41 1 A, 412 to 415, 418, 421 to 423, 431 to 434, 441 to 444, and 46 on the illumination optical axis of the light beam emitted from the light source lamp 416. It has an opening for storing optical components, a bottom surface 512B facing the opening, and a side surface portion 512A rising from the bottom surface 512B. This side part 512A and bottom The surface portion 512B constitutes the outer surface portion of the optical component housing 5A.
- a parallelizing concave lens 41 1A As shown in FIG. 7, on the inner surface of the side surface portion 512A, a parallelizing concave lens 41 1A, a unit in which a first lens array 412, a second lens array 413, and a polarization conversion optical element 414 are integrated, A first groove 512A1 for slidingly fitting the lens 415 from above and a second groove 512A2 for slidingly fitting the incident side lens 431, the reflection mirror 432, and the relay lens 433 from above are formed. ing.
- a circular hole 512A3 is formed in the front portion of the side surface portion 512A corresponding to the light beam emission position from the optical device 44, and a projection lens is provided on the light beam emission side of the hole 512A3.
- Installation part 516 is attached.
- a projection lens 46 is installed in the projection lens installation portion 516, and a first boss portion 51 2B1 for supporting a dichroic mirror 421 is provided on a bottom portion 512B for enlarging and projecting a light beam from the optical device 44.
- a second boss portion 512B2 having a groove corresponding to the two groove portions 512A2 and a polarizing plate holder 512B3 for supporting the incident side polarizing plate 442 are provided in a protruding manner.
- the polarizing plate holder 512B3 is preferably made of a heat conductive material, for example, a metal such as an aluminum alloy.
- the bottom surface 512B has a hole 515 having a substantially rectangular shape in a plane formed corresponding to the position of the liquid crystal panel 441 of the optical device 44 (a hole corresponding to the liquid crystal panel 441R is formed in the hole 515R and the liquid crystal panel 441G).
- the corresponding hole is a hole 515G
- the hole corresponding to the liquid crystal panel 441B is a hole 515B
- a hole 512B6 (see FIG. 8) is formed in the center portion surrounded by the hole 515.
- the hole 512B6 is used for fixing the optical device main body 45.
- heat conduction frames 513 and 514 are attached to the bottom surface portion 512B so as to correspond to the liquid crystal panel 441 of the optical device 44. That is, the heat conduction frames 513 are provided on two sides of the liquid crystal panels 441 R and 441 G and on the sides of the liquid crystal panels 441 G and 441 B, and the heat conduction frames 514 are provided on the liquid crystal panels 441 R and 441 B. On the side of The optical device 44 is provided on the light emission side of the optical device 44. The heat conduction frames 513 and 514 can move back and forth along the bottom surface portion 512B.
- the heat conduction frames 513 and 514 are made of a metal having a high thermal conductivity such as a metal such as an aluminum alloy or a heat conductive resin, and are attached along the bottom surface 512B of the lower light guide 51 51 3 A and 514 A And walls 513 B and 514 B as walls.
- the walls 513 B and 514 B of the heat conduction frames 513 and 514 are arranged to face each other with the liquid crystal panel 441 interposed therebetween, and these walls 513 B and 514 B have the above-described heat conduction plate 447. Is in contact. Further, a rectangular hole 514B1 is formed in the wall portion 514B of the heat conduction frame 514, corresponding to the position where the light beam is emitted from the optical device 44.
- the optical component storage section 512 in FIGS. 8 and 9 is in a state where the projection lens installation section 516 is removed.
- a duct 6 is formed on the back surface of the bottom portion 512B. This duct 6
- the cooling air from the intake fan 31 is guided to the optical device 44 including the liquid crystal panels 441 R, 441 G, and 441 B inside the optical component housing 5 A.
- the opening of the duct 6 is It is connected to the.
- the duct 6 and the intake fan 31 serve as a cooling device for cooling the optical device 44 including the liquid crystal panel 441.
- the duct 6 is provided with a rib (outer peripheral wall) 61 erected on the back surface of the bottom surface 51 2 B.
- the rib 61 is provided at a lower portion of the optical device 44 and a lower portion of the dichroic mirrors 421 and 422.
- a second rib (second outer peripheral wall) 612 provided inside the first rib 61 1.
- Both ends of the first rib 611 are connected to the intake fan 31, and an opening of the duct 6 is formed by the both ends.
- the second rib 612 is a cross dichroic It surrounds the lower part of the prism 444 and the lower parts of the liquid crystal panels 441 B and 441 G. That is, the second rib 6 1 2 integrally surrounds the lower part of the cross dichroic prism 4 4 4 and the peripheries of the holes 5 15 B and 5 15 G, but the periphery of the hole 5 15 R Is not enclosed.
- One end of the second rib 61 2 is disposed between both ends of the first rib 61 1 and is connected to the intake fan 31, and the other end is connected to the first rib 61 1
- One hole 5 15R is connected to the vicinity.
- the first rib 6 11 and the second rib 6 1 2 are connected to the bottom 2 of the lower case 2 2.
- Duct 6 is completed when 21 abuts.
- the portion between the first rib 6 11 and the second rib 6 12 is the first flow path 6A, and the portion surrounded by the second rib 6 12 is the second flow path. 6 B.
- the upper light guide 52 closes the opening of the optical component storage section 512 of the lower light guide 51, and includes a first upper light guide 521, which is disposed above the optical device 44, And a second upper light guide 5 22 arranged in other portions.
- the first upper light guide 52 1 has three holes 52 A for discharging cooling air at positions corresponding to the liquid crystal panel 44 1.
- the second upper light guide 5 2 2 is an optical component that is not supported by the first groove 5 1 2 A 1 and the second groove 5 1 2 A 2 of the lower light guide 5 1.
- the dichroic mirror 4 2 2 and the reflecting mirror 4 3 4 are supported.
- the second upper light guide 522 is provided with an adjusting section 5222A at a portion corresponding to the optical component position, and the attitude of the optical component is adjusted by the adjusting section 5222A, and each color is adjusted. Adjustment of the illumination optical axis of light can be performed.
- a cooling structure of the projector 1 will be described.
- projector In 1 a panel cooling system A for mainly cooling the optical device 44 and a light source cooling system B for mainly cooling the light source device 4 11 are provided.
- the panel cooling system A will be described with reference to FIGS. 9 and 10.
- the cooling fan sucked from the suction port 22 A of the lower case 22 by the suction fan 31 is supplied to the opening of the duct 6.
- Part of the cooling air supplied to this opening is introduced into the first flow path 6A.
- This cooling air flows in the clockwise direction in Fig. 9 and reaches the lower part of the lower light guide 51, which extends to the lower part of the dichroic mirrors 4 2 1 and 4 2 2 of the bottom part 5 1 2B. 2 Cool down B.
- the light is introduced into a hole 515R formed at a position corresponding to the liquid crystal panel 441R that modulates red light, which is a color light having a low light intensity, of the respective color lights separated by the color separation optical system 42. Then, as shown in FIG.
- the liquid crystal panel 4 4 1 enters the gap between the exit-side polarizing plate 4 4 3 and the holding frame 4 4 6 or enters the light beam incident side of the holding frame 4 4 6. Cool the R beam exit side and R beam entrance side, holding frame 4 4 6, and polarizing plates 4 4 2 and 4 4 3.
- color light with low light intensity will be described.
- the color light with low light intensity becomes red light.
- a halogen lamp or some other metal halide lamp is used as the light source, the color light having a low light intensity becomes blue light.
- the light intensity in the present application indicates energy obtained by an integral value of each color light of the light emitted from the light source for each wavelength range.
- the liquid crystal panel which is cooled by the cooling air in the first flow path 6A after cooling the bottom portion 512B of the lower light guide 51, is a liquid crystal in which low-energy color light in the wavelength range of each color light enters It is a panel, that is, a liquid crystal panel that receives a small amount of heat from incident light.
- the cooling air introduced into the opening of the duct 6 is supplied to the second flow path 6B (see FIG. 9).
- the cooling air is introduced into the holes 515G and 515B formed according to the liquid crystal panels 441G and 44IB.
- the cooling air in the second flow path 6B contacts the lower part of the cross dichroic prism 444 of the optical device 44 in the bottom surface part 512B.
- the optical component housing 5 A is thermally conductive Because the material is made of metal, for example, metal, only the portion of the bottom surface 512B where heat is transmitted from the optical device 44 does not locally become hot, but the heat is generated throughout the bottom surface 512B. Distributed.
- the cooling air in the second flow path 6B comes into contact with the portion of the optical device 44 to which heat is transmitted, but since the contact area is small, the cooling air passes through the lower portion of the optical device 44. Sufficient heat exchange does not take place between the bottom surface 5 12 B and the cooling air. Therefore, even with the cooling air passing through the lower part of the optical device 44, that is, the part where heat is transmitted, the liquid crystal panels 44 1 G and 44 1 B can be cooled.
- A surrounds the outside of the second flow path 6B, and the cooling air in the first flow path 6A is in wide contact with the bottom surface 512B. Therefore, the cooling air in the first flow path 6A performs sufficient heat exchange with the bottom portion 512B, and can sufficiently radiate heat from the bottom portion 512B.
- the cooling air enters the gap between the exit-side polarizing plate 44 3 and the holding frame 4 46 or the light-incident side of the holding frame 4 46 and enters each liquid crystal. Cool the light-exiting side and light-incident side of panel 441, G and B, holding frame 4446, and polarizing plates 4442 and 4443.
- the air that has cooled the liquid crystal panel 4 4 1 etc. as described above cools the pedestal 4 4 5 fixed above the cross dichroic prism 4 4 4, while the hole 5 of the first upper light guide 5 2 1 21 A is discharged from the optical component housing 5 A to the outside.
- the air exhausted to the outside of the optical component casing 5A is exhausted into a space between the upper light guide 52 and the control board 50 disposed above the upper light guide 52.
- the cooling air from the panel cooling system A not only serves to cool the optical device 44, but also is blown onto the surface of the liquid crystal panels 441, R, 441, G, and 441, B, so that the panel is cooled. It also plays a role in blowing off dust and the like adhering to the surface.
- the panel cooling system A allows the surface of the LCD panels 44 1 R, 44 1 G and 44 1 B to be always cleaned, so that the projector 1 can project an optical image with stable image quality on a screen or the like. become.
- a sirocco fan 32 provided near the light source device 4 11 is used.
- the intake port of the sirocco fan 32 is formed by an opening 5111A formed on the side of the light source storage section 5111 of the lower light guide 51, and a lateral section L2 of the lamp / paging L. Are arranged to face the gap.
- the light passes through the integrated first lens array 412, second lens array 413, and polarization conversion optical element 414, and then cools them.
- the light source lamp 4 16 enters the inside of 4 11 and cools the elliptical mirror 4 17.
- the polarization conversion optical element 4 14 since the polarization conversion optical element 4 14 generates a large amount of heat by being irradiated with the light beam from the light source lamp 4 16, cooling the polarization conversion optical element 4 14 This is effective for stable operation of the unit 4 and improvement of durability.
- the air that has cooled the polarization conversion optical element 4 14 and the light source device 4 11 1 passes through the opening 5 11 A formed on the side surface of the light source housing 5 11 1 of the lower light guide 51 and the lamp housing L.
- the air is sucked by the sirocco fan 32 through a gap formed between the side case L2 and the air, and is discharged through the air opening 212A formed in the side surface 212 of the upper case 21.
- the liquid crystal panel 441 includes an emission-side dustproof plate 441E and an incident-side dustproof plate 441F.
- the emission-side dustproof plate 441E and the incident-side dustproof plate 441F include a holding frame 446 in which the liquid crystal panel 441 is stored and held. Is connected to Therefore, the heat of the liquid crystal panel 441 is radiated to the holding frame 446 from the emission side dustproof plate 441E and the incident side dustproof plate 441F.
- the holding frame 446 is connected to a heat conductive plate 447 fixed to the light incident side of the holding frame 446, and the heat transmitted to the holding frame 446 exchanges heat with the cooling air of the panel cooling system A. Then, the heat is radiated to the heat conduction plate 447.
- the heat conduction plate 447 is connected to the walls 51 3B and 514B of the heat conduction frames 513 and 514 attached to the lower light guide 51.
- the heat transmitted to the heat conduction plate 447 is transmitted to the panel cooling system A.
- the heat is exchanged with the cooling air, and the heat is radiated to the heat conduction frames 513 and 514.
- the heat conduction plate 447 thermally expands due to the transmitted heat, and the end of the heat conduction plate 447 in the extending direction moves toward the heat conduction frames 513 and 514.
- the deformation due to the thermal expansion of the heat conduction plate 447 is absorbed. Therefore, the difference in thermal expansion of the liquid crystal panels 441 R, 441 G, and 441 B due to the variation in the heat generated by the heat conductive plate 447 is absorbed by the movement of the heat conductive frame 513, so The generation of uneven stress on the conductive plate 447 is suppressed.
- the heat conduction frames 513 and 514 are connected to the bottom surface 512B of the lower light guide 51 via the mounting portions 513A and 514A, and the heat transmitted to the heat conduction frames 513 and 514 is as described above.
- the heat is exchanged with the cooling air by the panel cooling system A, and the heat is radiated to the portion of the bottom surface portion 512B of the lower light guide 51 where the first flow path 6A is formed. Then, this heat is exchanged with cooling air passing through the first flow path 6A of the panel cooling system A.
- the holding frame 446 for storing the liquid crystal panel 441 and the emission-side polarizing plate 443 Since the heat transmission from each other is blocked by spacers 449 made of heat-insulating resin, heat from the emission-side polarizing plate 443 is transferred to each liquid crystal panel 441 R. , 44 1 G and 44 1 B are not transmitted.
- the polarizing film 443A of the exit-side polarizing plate 4443 generates heat by transmitting a light beam.
- the polarizing film 443A is connected to the substrate 443B, and the heat generated by the polarizing film 443A is exchanged with the cooling air by the panel cooling system A, and the substrate is cooled. Heat is dissipated to 4 4 3 B.
- the substrate 4443B is connected to a pedestal 4445 fixed to the upper and lower surfaces of the cross dichroic prism 4444, and the heat transmitted to the substrate 4443B is cooled by the panel cooling system A.
- the heat is exchanged with the air, and the heat is radiated to the upper and lower pedestals 4 4 5
- the heat generated by the cross dichroic prism 4 4 4 is also transferred to the pedestals 4 above and below the cross dichroic prism 4 4. Heat is dissipated to 4-5.
- the pedestal 4 45 fixed above the cross dichroic prism 4 4 4 is in contact with the air inside the housing 5A, and the heat transferred to the pedestal 4 45 fixed above is Panel cooling system A exchanges heat with cooling air.
- the pedestal 4 45 fixed below the cross dichroic prism 4 4 4 is connected to the bottom surface 5 12 B of the lower light guide 51, and is transmitted to the pedestal 4 45 fixed below. The heat is transferred to the bottom surface 512B in the second flow path 6B.
- the entrance-side polarizing plate 442 generates heat due to transmission of a light beam.
- the heat of the polarizing film is transferred to the substrate of the incident-side polarizing plate 442. Since this substrate is supported by a polarizing plate holder 5 1 2 B 3 protruding from the bottom surface 5 12 B, the heat transferred to the substrate is transferred through the polarizing plate holder 5 1 2 B 3. First-class It is transmitted to the bottom part 5 1 2 B in the road 6 A. Then, this heat is exchanged with cooling air passing through the first flow path 6A of the panel cooling system A.
- this bottom portion 512B is directly cooled by the cooling air passing through the first flow path 6A, it can be cooled efficiently. As a result, the heat of the liquid crystal panel 4 41, the exit side polarizing plate 4 4 3, the cross dichroic prism 4 4 4, and the incident side polarizing plate 4 4 2 is easily transmitted to the bottom surface 5 1 2 B, and these components The heat radiation efficiency can be improved.
- an ultra-high pressure mercury lamp is used as the light source lamp 4 16, and in this ultra-high pressure mercury lamp, the light intensity of red light is equal to the light intensity of green light and blue light. It is getting weaker. Therefore, the calorific value of the liquid crystal panel 44 1 R on which red light enters is lower than that of the liquid crystal panels 44 1 G and 44 1 B on which other color lights enter. Therefore, the liquid crystal panel 4441R can be sufficiently cooled even with the cooling air after cooling the bottom portion 512B of the housing 5A.
- the liquid crystal panels 44 1 G and 44 1 B generating a large amount of heat are cooled by the cooling air introduced through the second flow path 6 B.
- the cooling air passing through the second flow path 6B comes into contact with a part of the bottom surface 512B, but since the contact area is small, the cooling air at a lower temperature is not sufficiently exchanged with the holes 5B. Introduced in 15 B, 5 15 G. Therefore, the liquid crystal panels 44 1 G and 44 1 B can be efficiently cooled.
- (1-4) As described above, since the cooling efficiency of the bottom surface 5 12 B of the optical component housing 5 A and the liquid crystal panel 4 41 can be increased, the rotation speed of the intake fan 31 is reduced. The noise caused by the rotation of the intake fan 31 can be reduced.
- the duct 6 has one opening, and the intake fan 31 connected to this opening has one. Therefore, a plurality of openings are provided in the duct, and The number of parts can be reduced and cost can be reduced as compared with the case where each intake fan 31 is connected.
- the present embodiment differs from the above embodiment in the structure of the ribs of the duct provided on the bottom surface 512B of the optical component casing. That is, the optical component casing 5B of the present embodiment includes a duct 7 different from that of the above-described embodiment, but is otherwise the same as the optical component casing 5A of the above-described embodiment. .
- the duct 7 of the present embodiment includes a rib (outer peripheral wall) 71.
- the rib 71 is substantially the same as the first embodiment, and the first rib (first outer peripheral wall) 6. 11 and a second rib (second outer peripheral wall) 7 12 provided on the inner side of 11.
- the duct 7 and the intake fan 31 serve as a cooling device for cooling the optical device 44 including the liquid crystal panel 44 1.
- the second rib 7 1 2 surrounds the holes 5 15 G and 5 15 B corresponding to the panels 4 4 1 G and 4 4 1 B, but the cross dichroic prism 4 4 4 of the optical device 4 4 The lower part of is not enclosed.
- One end of the second rib 711 is disposed between both ends of the first rib 611, and is connected to the intake fan 31.
- the other end of the second rib 711 is a hole 515R. It is connected to the nearby first rib 6 11.
- the second rib 712 transmits green light, which is the color light having the highest light intensity, of the respective color lights separated by the color separation optical system 42 from one end connected to the intake fan 31. Connect to the hole 5 15 G corresponding to the liquid crystal panel 4 41 G to be modulated. Further, the second rib 711 is connected from the hole 515 G to the hole 515 B, and surrounds the periphery except one side of the hole 515 B, and the hole 515 B to the hole 515 G To the other end connected to the first rib 611 near the hole 515R from the hole 515G. Thereby, the second rib 712 surrounds a range connected in series from the opening to the hole 515B via the hole 515G.
- first channel 7A The portion between the second rib 711 and the first rib 611 is referred to as a first channel 7A, and the portion surrounded by the second rib 712 is referred to as a second channel 7B.
- the cooling air taken in by the intake fan 31 is supplied to the opening of the duct 7, and a part of the air is introduced into the first flow path 7A.
- the cooling air introduced into the first flow path 7A flows in the counterclockwise direction in Fig. 11 and is located below the dichroic mirrors 4 2 1 and 4 2 2 in the bottom 5 1 2B of the lower light guide 51.
- the lower part 5 12 B of the optical device 44 is cooled down by reaching the lower part of the cross dichroic prism 44 4 of the optical device 44. Then, it is introduced into a hole 515R formed at a position corresponding to the liquid crystal panel 441R.
- cooling air introduced into the opening of the duct 7 is introduced into the second flow path 7B.
- a part of this cooling air is first introduced into the hole 5 15 G formed at the position corresponding to the liquid crystal panel 4 41 G, and the remaining cooling air is supplied to the position corresponding to the liquid crystal panel 4 4 1 B. It is introduced into the formed holes 5 15 B. That is, the cooling air flowing through the second flow path 7B is
- the cooling air introduced into the holes 515R, 515G, and 515B cools the optical device 44 as in the first embodiment.
- the second rib 7 1 2 does not surround the lower part of the cross dichroic prism 4 4 4 of the optical device 4 4, and the bottom rib 5 1 2 B surrounded by the second rib 7 12
- the area is very small. Therefore, heat exchange between the cooling air passing through the second flow path 7B and the bottom part 512B can be reliably prevented, and the temperature rise of the cooling air that can be introduced into the holes 515G and 515B is reduced. It can certainly be hindered. Thus, the liquid crystal panels 44 1 G and 44 1 B can be efficiently and sufficiently cooled.
- the cooling air passing through the second flow path 7B is first introduced into the holes 515G corresponding to the liquid crystal panel 44 1G, and the remaining air is supplied to the liquid crystal panel 44 1B. It is introduced into the corresponding hole 5 15 B.
- the liquid crystal panel 441 G that modulates green light generates a large amount of heat, so even if the air volume is small, enough air is introduced into the hole 515 G corresponding to the liquid crystal panel 441 G.
- the liquid crystal panel 4 4 1 G can be cooled.
- the number of the intake fans 31 for taking in the cooling air is one, but in the present embodiment, two intake fans 31 are provided.
- One of the intake fans 31 A is located in front of the hole 5 15 B corresponding to the liquid crystal panel / array 44 IB (on the side of the projection lens 46 (left side in Fig. 12)).
- the other intake fan 31B is disposed in front of the hole 515R corresponding to the liquid crystal panel 4411R (projection side (projection lens 46 side)).
- the optical component housing 5C of the present embodiment includes a duct 8 having a shape different from that of each of the above embodiments, but is otherwise the same as the optical component housing 5A of the above embodiment.
- the duct 8 has two openings connected to the intake fans 31A and 31B, respectively, and a rib (outer peripheral wall) 81.
- the intake fans 31 A and 31 B and the duct 8 cool the optical device 44 including the liquid crystal panel 41. It becomes 7 order units.
- the rib 81 includes a first rib (first outer peripheral wall) 811 surrounding the lower portion of the optical device 44 and the lower portions of the dichroic mirrors 421 and 422, and a cross dichroic prism 444 below the optical device 44. And a second rib (second outer peripheral wall) 812 surrounding the lower part of the liquid crystal panels 441B and 441G.
- first rib first outer peripheral wall
- second rib second outer peripheral wall
- One end of the first rib 811 is connected to the intake fan 31A, and the other end is connected to the second lip 812 through the outside of the hole 515R.
- the second rib 812 integrally surrounds the lower part of the cross dichroic prism 444 and the periphery of the holes 515B and 515G, but does not surround the periphery of the hole 515R.
- both ends of the second rib 812 are connected to the intake fan 31B, and one end of the duct 8 is formed by both ends of the second rib 812.
- a third rib 813 extending toward the intake fan 31A is provided in a portion near the hole 515B of the second rib 812, and a duct 8 is formed by the third rib 813 and the first rib 811. Is formed.
- a portion between the third rib 813 and the first rib 811 and a portion between the first rib 811 and the second rib 812 become the first flow path 8A and are surrounded by the second rib 812. The portion that has become the second flow path 8B.
- the cooling air taken in by the intake fan 31A is supplied to the other opening and introduced into the first flow path 8A.
- This cooling air flows clockwise in FIG. 12, and goes around the lower part of the dike ports 421 and 422 to cool the bottom part 512B. Then, it is introduced into a hole 515R formed at a position corresponding to the liquid crystal panel 441R.
- the cooling air taken in by the intake fan 31B flows from the one opening to the second flow path 8B, and is directly introduced into the holes 515B, 515G formed according to the liquid crystal panels 441G, 441B.
- the cooling air flowing through the second flow path 8B Is in contact with the lower part of the cross dichroic prism 444 of the optical device 44 of the bottom part 512B, but since this contact area is small, sufficient heat exchange between the cooling air and the bottom part 51 2B is not possible. Not done. Therefore, the liquid crystal panels 441G and 441B can be cooled by the cooling air.
- two intake fans 31A and 31B are provided.
- the optical component housing 5D of the present embodiment includes a duct 9 different from that of the above embodiment, but is otherwise the same as the optical component housing 5A of the above embodiment.
- the shape of the rib (outer peripheral wall) 91 of the duct 9 of the present embodiment is different from the shape of the rib 81 of the duct 8 of the third embodiment, and the lower part of the optical device 44 and the lower part of the dichroic mirrors 421 and 422 are different.
- a third rib (third outer peripheral wall) surrounding the 515B, and a fourth rib (fourth outer peripheral wall) 914 extending from the second rib 912 through the inside of the hole 515R toward the third rib 913. It has.
- the duct 9 and the intake fans 31A and 31B serve as a cooling device for cooling the optical device 44 including the liquid crystal panel 441.
- the first rib 911 has one end connected to the intake fan 31B, and the other end extended to near the hole 515B and connected to the third rib 913.
- the second rib 912 extends substantially parallel to the first rib 911. 2nd rib 912 One end is connected to the intake fan 31B, and one end of the duct 9 is formed by this end and the end of the first rib 911. The other end of the second rib 912 is located between the third rib 913 and the first rib 911 and is disposed near the hole 515B.
- Both ends of the third rib 913 are connected to the intake fan 31A, and the other ends of the third rib 913 form the other opening of the duct 9.
- a portion between the first rib 911 and the second rib 912, a portion between the second rib 912 and the third rib 913, and a second rib 91 A portion between the second rib 4 and the fourth rib 9 14 forms a first channel 9A.
- a second channel 9B is formed in a portion surrounded by the third rib 913.
- the cooling air taken in by the intake fan 31B is supplied to the first flow path 9A.
- This air passes through a portion (outer channel 9A1) between the first rib 911 and the second rib 912 of the first channel 9A, and cools the bottom surface 512B. Since the first flow path 9A has a dead end at a connection portion between the first rib 911 and the third rib 913 near the hole 515B, the cooling air is turned back at this portion and the second rib It is introduced into the part (inside flow path 9A2) between the 912 and the third rib 913 to cool the bottom part 512B. Then, the air is guided to the hole 515R, and is introduced into the hole 515R.
- the cooling air introduced into the second flow path 9B by the intake fan 31A passes through a portion surrounded by the third rib 913, and a part of the cooling air enters the hole 515B.
- the remaining cooling air that did not enter hole 515B enters hole 515G.
- the cooling air in the second flow path 9B is introduced into the holes 515B and 515G without almost touching the bottom surface 512B of the optical component housing 5D. You. Therefore, the liquid crystal panels 441 B and 441 G can be reliably cooled.
- the first flow path 9A of the present embodiment guides the cooling air from the intake fan 31B provided in front of the hole 515R to the portion near the hole 515B by the outer flow path 9A1. It is turned back at the connection portion between the second rib 913 and the third rib 913, and is introduced into the hole 515R through the inner channel 9A2.
- the distance of the first flow path 9A is long, the time during which the cooling air is in contact with the bottom portion 512B is prolonged, and sufficient heat exchange between the cooling air and the bottom portion 512B is performed. Will be able to Therefore, the bottom part 512B can be reliably cooled. Thus, heat dissipation of the optical component transmitting heat to the bottom surface portion 512B can be promoted, and quality degradation of the optical component can be prevented.
- 31 B and 31 A provide sufficient cooling air. Therefore, even if the distance of the first flow path 9A is long, sufficient cooling air is introduced into the hole 515R. Also, the remaining cooling air that did not enter the hole 515 B of the second flow path 9 B also has a hole 515 G corresponding to the liquid crystal panel 41 G that modulates green light, which is a color light having a large light intensity among the respective color lights. Can be cooled sufficiently. Thereby, the bottom surface portion 512B, the liquid crystal panel 441, and the like can be reliably cooled.
- the ducts 6 to 9 are formed in the optical component casings 5A to 5D, but in the present embodiment, the duct 10 and the optical component casing 5E are separate. You.
- the optical component housing 5E is composed of a lower light guide 51E for accommodating each optical component 41 1A, 412 to 415, 418, 421 to 423, 431 to 434, 441 to 444, 46, and a lower light guide 51E.
- An upper light guide 52E provided on the 51E is provided.
- the lower light guide 51E is different from the lower light guide 51 in that the light source housing 51 1 is not provided, but the other points are substantially the same as the lower light guide 51.
- a heat conductive material for example, a metal such as an aluminum alloy.
- the upper light guide 52E is different from the upper light guide 52 in that the upper light guide 52E includes a light source housing 523 for housing a light lamp 416, an elliptical mirror 417, and the like. The other points are the same as those of the upper light guide 52.
- Duct 10 is fitted with intake fans 31 (31A, 3
- the duct 10 is attached to the back surface of the bottom portion 51 2 B of the lower light guide 51E, and has a box-like shape with an open top surface.
- the duct 10 is made of a heat conductive member, and is made of, for example, the same metal as the optical component casing 5E.
- the duct 10 includes a bottom surface portion 101 and a rib (outer peripheral wall) 102 erected from the outer peripheral edge of the bottom surface portion 101.
- 16 and 17 are views of the duct 10 as viewed from the opening on the upper surface.
- a portion located on the projection side is formed with a concave portion 102A that is recessed in a direction opposite to the projection direction.
- the recess 102A prevents interference between the datum 10 and the projection lens 46.
- the notch 102B serves as an opening for introducing cooling air into the first flow path 1 OA and the second flow path 1 OB 1 described below, and the notch 102C has a cooling air flow in the second flow path 10B 2. Opening for introducing cooling air.
- the intake fans 31A and 31B are connected to the openings, respectively.
- the opening formed by the notch 102B is divided into two, an opening for introducing cooling air to the first flow path 1OA and an opening for introducing cooling air to the second flow path 1OB1. Become.
- the notches 102B and 102C are A different notch 102D is formed. From this notch 102D, a part of the cooling air passing through the first flow path 1OA flows out, and is introduced into the hole 51 2B7 formed on the bottom surface 512B (see FIG. 15). The polarization conversion optical element 414 and the like constituting the system 41 are cooled.
- a plurality of ribs 103A to 103F are provided upright on the inside of the rib 102 on the bottom surface portion 101 of the duct 10.
- the height of the plurality of ribs 103A to 103F is substantially equal to the height of the rib 102.
- the rib 103A is for defining a second flow path 1OB1 for introducing cooling air into a hole 515B corresponding to the liquid crystal panel 441B of the optical component housing 5E, and is substantially planar. It has a U-shape.
- the rib 103A includes a pair of opposing pieces 103A1, 103A2 and a piece 103A3 connecting the pieces 103A1, 103A2.
- Piece: L 03 A 3 is provided so as to extend along side 515 B 2 of hole 515 B when duct 10 is attached to bottom surface 512 B of optical component housing 5 E.
- the portions where the holes 515R, 515G, and 515B are located are indicated by dotted lines.
- the shapes of the holes 515R, 515G, 515B are substantially square.
- the sides forming the hole 515B are sides 515B1 to 515B4, the sides forming the hole 515G are sides 515G1 to 515G4, and the sides forming the hole 515R are sides 515R1 to 515R4.
- the length of the piece 103A3 is about half the length of the side 515B2 of the hole 515B.
- the piece 103A1 of the rib 103A extends along the side 515B1 of the hole 515B, and the piece 103A2 extends across the center of the hole 515B.
- This piece 103A2 extends to the opening formed by the notch 102B.
- an opening for supplying a cooling fluid to the second flow path 1 OB1 is formed by the tip of the piece 103A2 and the tip of the piece 103A1. Accordingly, the cooling air supplied from the opening to which the intake fan 31A is attached and passes through the second flow path 10B1 is introduced from the half of the hole 515B on the projection side.
- the rib 103B is for partitioning the second second flow path 1OB2, is connected to the piece 103A2 of the rib 103A, and is on the outer peripheral side of the holes 515B, 515G, and the hole 515B. It extends so as to surround the inner peripheral side of R. Specifically, the rib 103B extends along the side 515B3 of the hole 515B, the side 515G4 on the outer side 515G4 of the hole 515G, and the side 515G3 located on the side of the hole 515R. .
- the rib 103B extends along an inner side 515R2 of the hole 515R and a side 515R3 on the side of the rib 102, and a tip end thereof is connected to a notch '102C of the rib 102. I have.
- the rib 103C is disposed between the holes 515G and 515R when the duct 10 is attached to the optical component housing 5E, and has a substantially U-shaped plane.
- the rib 103C includes two opposing pieces 103C1 and 103C2, and a piece 103C3 connecting these base ends.
- the tips of the pieces 103C1 and 103C2 are connected to the rib 103B.
- the piece 103C2 comes into contact with the side 515R1 of the hole 515R when the duct 10 is attached to the bottom surface 512B.
- a rib 103F extending toward the rib 102 is provided at a corner formed by the piece 103C1 and the piece 103C3 of the rib 103C.
- the rib 103D extends from the end on the projection side of the piece 103A3 of the rib 103A toward the rib 102.
- the rib 103D is for preventing the cooling air introduced from the intake fan 31B from flowing between the piece 103A1 of the rib 103A and the rib 102 and from being accumulated.
- the rib 103E is arranged between the holes 515B and 515G when the duct 10 is attached to the bottom surface 512B.
- the lip 103E has a substantially U-shape in plan view, is arranged so that its opening faces the rib 103B, and is in contact with the rib 103B. Has been continued. Opposing pieces of the rib 103E extend along the sides 515B3, 515G1 of the holes 515B, 515G, respectively.
- the first flow path 10A and the second flow paths 10B1, 10B2 are defined by the ribs as described above.
- the first second channel 1 OB 1 is formed by the rib 103A.
- a second second flow path 1OB2 is formed in a portion located on the projection side. That is, the second flow path 10B2 is defined by the rib 103B, the rib 102, the rib 103D, the rib 103A, and the rib 10.3E.
- the portion surrounded by the ribs 10'3A to 10C and the rib 102 the portion located on the side opposite to the projection side, the portion between the rib 103F and the rib 102, the rib 102 and the lip 103C
- the portion between the piece 103C3 and the portion between the lip 103B and the piece 103C2 of the rib 103C serves as a second flow path 10A for guiding cooling air for cooling the liquid crystal panel 441R. That is, the first flow path 10A is defined by the ribs 103A and 103B, the rib 102, the rib 103F, and the lip 103C.
- the current plate 104 has a substantially L-shape in plan view, and is provided upright on the bottom surface portion 101 of the duct 10.
- the two current plates 104 extend substantially parallel to each other from the opening connected to the first flow path 10A toward the tip of the rib 103F.
- the height of the current plate 104 is substantially equal to the height of the ribs 102 and 103A to 103F.
- the current plate 104 Abuts on the bottom surface 512B.
- the current plate 104 is made of a heat conductive member, and is made of, for example, metal.
- the duct 10 includes the second flow path 1 OB 1 and the second flow path 1 OB 2 near the center of the bottom surface 512B, and the second flow path A first flow path 1OA is provided so as to surround the B1 and the second flow path 10B2. The flow of the cooling air using the duct 10 as described above will be described.
- a part of the cooling air taken in by the intake fan 31A is introduced into the first flow path 1OA, the flow is regulated by the rectifying plate 104, and flows to the leading end of the rib 103F in the extending direction. Then, it flows between the leading end of the rib 103F in the extending direction and the rib 102 and is folded back. Furthermore, it passes between the rib 102 and the piece 103C3 of the rib 103C and between the piece 103C2 of the lip 103C and the rib 103B, and is introduced into the hole 515R.
- the hole for guiding the cooling air in the first flow path 10A is a hole corresponding to the liquid crystal panel 441 when modulating the color light having a low light intensity among the respective color lights. In the present embodiment, the liquid crystal panel 41 modulating the red light is used.
- the hole corresponding to R is 5 15 R. Since the magnitude of the light intensity has been described in the first embodiment, it is omitted in the present embodiment.
- the cooling air cools the bottom surface 512B of the optical component housing 5E while passing through the first flow path 10A.
- a part of the cooling air flowing to the side opposite to the projection side of the current plate 104 flows out from the notch 102D of the rib 102 and flows to the bottom surface 512B. It is introduced into the formed hole 512B7 (see FIG. 15) and cools the polarization conversion optical element 414 and the like constituting the integrator illumination optical system 41.
- cooling air taken in by the intake fan 31A is introduced into the second flow path 10B1.
- the cooling air introduced into the second flow path 10B1 is introduced into the optical component housing 5E from a half of the hole 515B of the optical component housing 5E on the projection side.
- the cooling air taken in by the intake fan 31B flows into the second flow path 10B2. This cooling air passes between the ribs 102 and 103B and is introduced into the holes 515B, 515G.
- the rib 103A is a piece that extends along 515B2 of the hole 515B. 0 3 A 3 and a piece 1 0 3 A 2 extending across the center of the hole 5 15 B, the cooling air from the second flow path 1 OB 2 is supplied to the projection side of the hole 5 15 B Will be introduced from the opposite half force.
- the cooling air flowing through the second flow path 10 B 2 contacts the lower part of the cross dichroic prism 4 4 4 in the bottom surface 5 12 B.
- the optical component housing 5A is made of a heat conductive material, for example, a metal, only the portion of the bottom portion 512B where heat is transmitted from the optical device 44 locally has a high temperature. Instead, heat is spread across the bottom surface 5 12 B. Therefore, the cooling air in the second flow path 6B comes into contact with the portion of the optical device 44 where heat is transmitted, but since this contact area is small, the cooling air and the bottom surface 512B There is no sufficient heat exchange between the two.
- the first flow path 10A surrounds the outside of the second flow path 10B1 and 10B2, and the cooling air of the first flow path 6A contacts the bottom surface 512B over a wide area. are doing. Therefore, the cooling air in the first flow passage 10A performs sufficient heat exchange with the bottom surface 512B, and can sufficiently radiate heat from the bottom surface 512B.
- the duct 10 and the optical component housing 5E are separated from each other, so if the duct 10 is attached to the bottom 5 1 2B of the conventional optical component housing 5E, Since the optical component casing of the embodiment can be configured, it is not necessary to newly manufacture an optical component casing, so that cost can be reduced.
- the cooling air can be uniformly flown in the first flow path 10A, and the bottom part 512B of the optical component housing 5E is uniformly cooled. be able to.
- the current plate 104 is made of metal. Since this current plate 104 is in contact with the bottom portion 512B of the optical component housing 5E, it is transmitted to the bottom portion 512B. The generated heat is transmitted to the current plate 104. Since the current plate 104 is cooled by the cooling air passing through the first flow path 10A, it functions as a radiation fin. Thereby, the bottom surface portion 512B of the optical component housing 5E can be cooled more efficiently.
- the heat of the liquid crystal panel 441, the emission-side polarizing plate 443, the cross dichroic prism 444, and the incidence-side polarizing plate 442 is easily transmitted to the bottom surface 512B, and the heat radiation efficiency of these components can be increased.
- An intake fan may be connected to each of the flow paths 10A, 10B1, and 10B2, but in this case, a large number of intake fans are required, and the cost of the projector 1 increases. .
- a large number of intake fans must be installed, a large installation space is required, and the projector 1 may be enlarged.
- the cooling air is sent to the second flow path 10B1 and the first flow path 1OA by one intake fan 31A. This can prevent an increase in intake fans.
- the space for installing the intake fan can be reduced, it is possible to prevent the projector 1 from being oversized.
- the duct 10 is connected to the bottom portion 5 of the optical component housing 5E.
- the hole 51 5R has three sides (515R1, 515R2, 515R3) surrounded by the ribs 103B, 103C, so that cooling air can be reliably introduced into the hole 515R. it can.
- two intake fans 31 are connected to the duct 10, but the duct 11 of the present embodiment is configured so that only one intake fan 31 is connected. Absent.
- two second flow paths 10B1 and 10B2 are provided. However, in the present embodiment, only one second flow path is provided.
- the duct 11 of the present embodiment includes a bottom surface portion 101 and a rib 102 erected from the outer peripheral edge of the bottom surface portion 101.
- the rib 102 has a notch 102B and a notch 102D.
- An intake fan 31 is connected to the notch 102B, and serves as an opening for introducing cooling air into a first flow path 11A and a second flow path 11B described later.
- the duct 11 is, like the duct 10, made of a heat conductive member, for example, metal.
- ribs 113C, 103F and ribs 113A, 113B, 113D similar to those of the above-described embodiment are erected.
- the height of the ribs 113A, 113B, and 113D is approximately equal to the height of the rib 102.
- the rib 113B is for forming the second flow path 111B, and one end thereof is connected to the notch 102B of the rib 102, that is, substantially the center of the opening.
- the lip 113B extends so as to surround the outer periphery of the holes 515B, 515G of the bottom surface 512B of the optical component housing 5E, and further along the inner side 515R2 of the hole 515R.
- the other end of the rib 113B reaches the turn 102A of the rib 102.
- a rib 103C similar to the fifth embodiment is connected to the rib 113B, and a rib 103F is connected to the rib 103C.
- the bottom surface 101 has a lip 113A formed along the side 515R3 of the hole 515R.
- One end of the rib 113A is connected to the rib 102, and the other end is connected to the rib 113B. It is connected to the.
- a rib 113D is connected to the rib 113B.
- the rib 113D is substantially L-shaped in plan and extends along the sides 515B2 and 515B3 of the hole 515B.
- the length dimension of the portion of the rib 113D along the side 515B2 is about half of the side 515B2.
- a first channel 11A is formed by a portion between the piece 103C3 and the rib 102, and a portion surrounded by the piece 103C2 of the rib 103C and the rib 113A. Also, of the portion surrounded by ribs 113B and 102, Channel 1 IB is formed.
- Cooling air taken in by the intake fan 31 is supplied to an opening of the duct 11, and a part of the air flows into the first flow passage 11 A.
- a part of the cooling air flowing through the first flow passage 11A is regulated by the flow straightening plate 104, and flows to the tip of the rib 103F.
- Hole 5 passes between the rib 10 3 C piece 10 3 C 3 and the rib 10 2, and further between the rib 10 3 C piece 10 3 C 2 and the lip 11 13 A Introduced in 15 R.
- the cooling air cools the bottom surface 512B of the optical component housing 5E while passing through the first flow passage 11A.
- Another part of the cooling air flowing into the first flow path 11A flows from the notch 102D as in the fifth embodiment, and the polarization conversion optical element 41 constituting the integrator illumination optical system 41 Cool 4 mag.
- Another part of the cooling air supplied to the opening of the duct 11 is introduced into the second flow path 11B. Then, of the cooling air introduced into the second flow path 11B, a part of the air is hit by the ribs 113D and is stopped, and is introduced into the holes 515B. Some of the air flows below the cross dichroic prism 444 and into the hole 515 G.
- the cooling air can be reliably introduced into the holes 5 15 B.
- the bottom surfaces 512B of the optical component housings 5A to 5E are cooled by the first flow passages 6A to 11A of the ducts 6 to 11.
- the side surface portion 512A may be cooled.
- cooling air passing through the first flow paths 6A to 11A is used to cool not the bottom portion 512B of the optical component housing 5A to 5E but other components, for example, optical components. You may.
- each rib 61 to 91 is brought into contact with the bottom surface portion 22 1 of the lower case 22 and a gap between the tips of the ribs 61 to 91 in the standing direction is provided.
- each duct 6 to 9 is completed by closing, a plate-like member for closing between the ends of the ribs 61 to 91 may be provided separately.
- the configuration is such that the ends of the ribs 6 1 to 9 1 are brought into contact with the bottom portion 2 2 1 of the lower case 22 to complete the ducts 6 to 9. This eliminates the need for a member that closes the ends of the ribs 61 to 91, so that the number of members can be reduced.
- the liquid crystal panel 4 41 R for modulating red light was cooled by air passing through the first flow paths 6 A to 11 A.
- the cooling configuration is adopted, the present invention is not limited to such a configuration.
- the light modulator that modulates the color light having a low light intensity among the color lights emitted from the light source lamp may be cooled by the cooling air passing through the first flow path.
- the liquid crystal panel 441 B that modulates blue light is supplied to the first stream. It may be cooled by cooling air passing through the road.
- the first flow paths 6A to 9A and 11A are light modulation devices that modulate color light having low light intensity among a plurality of light modulation devices.
- the second channels 6 B to 9 B and 11 B cool the liquid crystal panels 44 1 G and 44 1 B which are other light modulation devices.
- the present application is not limited to this.
- Light modulator that modulates the color light with low light intensity according to the characteristics of the lamp used for the light source lamps 4 16 in the first flow path 6 A to 9 A and 11 A, and modulates the other color light Any configuration may be used as long as the apparatus is cooled by the second flow paths 6B to 9B and 11B.
- one optical modulator is cooled by the first flow paths 6A to 9A and 11A, and the second flow paths 6B to 9B and Although the two optical modulators are cooled by 1 1B, the present invention is not limited to this. Modulate the color light with low light intensity according to the characteristics of the lamp in the first flow path 6 A to 9 A and 11 A. Cool the two light modulators, and make the second flow path 6 B to 9 B and 11 B It is also possible to adopt a structure for cooling another light modulation device.
- the present invention can be applied to a projector using two or four or more light modulation devices.
- the light modulator cooled in the first flow paths 6A to 9A and 11A and the light modulator cooled in the second flow paths 6B to 9B and 11B are provided in the light source lamp 4 16 Each can be selected according to the characteristics of the lamp used and the cooling efficiency.
- Liquid crystal panels 44 1 R and 44 1 B Second flow paths 6 B to 9 B and 11 B Not limited to two liquid crystal panels cooled by B, for example, an ultra-high pressure mercury lamp was used as In the case, the second flow paths 6B to 9B and 11B cool only the liquid crystal panel 441G, which is the light modulator that modulates the color light having the strong light intensity among the plurality of light modulators, and The paths 6A to 9A and 11A may be configured to cool the liquid crystal panels 441R and 441B, which are other light modulation devices. 200,
- the flow straightening plate is not provided in the flow path
- a current plate 104 may be arranged.
- the current plate 104 may be erected on the bottom surface 512B of the optical component housing 5 #.
- a current plate may be provided upright on the bottom surface 22 1 of the lower case 22 of the outer case, and may be disposed in the flow path. By doing so, it is possible to prevent turbulence of the cooling air flowing through the flow passage, and to reduce noise.
- a force provided with only one second flow path for example, even if a second second flow path 8B1 is formed as shown in FIG. Good.
- the second second flow path 8B1 and the first flow path 8A are connected to the same intake fan 31A. According to this, in addition to the effects of the first to fourth embodiments, the same effects as (5-4) and (5-5) of the fifth embodiment can be obtained.
- the current plate 104 is provided, but the current plate 104 may not be provided. By doing so, the number of members used for the ducts 10 and 11 can be reduced.
- two second flow paths 10B1 and 10B2 are provided, but the second flow path 1OB1 may not be provided.
- the optical component housing 5E and the ducts 10 and 11 are configured as separate bodies.
- a duct 12 having substantially the same structure as that of the outer case 2 may be formed in the lower case 22.
- the ribs forming the first flow path and the second flow path are provided on the bottom surface 22 1 of the lower case 22 in correspondence with the position of the bottom surface 5 12 B of the optical component housing 5 E. Is established.
- the duct 12 is constituted by the bottom part 21 of the exterior case 2, the ribs, and the bottom part 512B of the optical component housing 5E.
- the outer case 2 and the duct 12 can be integrated, the number of members can be reduced. Further, a conventionally used optical component casing can be used. Further, a part of the rib constituting the duct may be formed in the lower case 22 of the outer case 2, and the other part may be formed in the bottom part of the optical component casing.
- the present invention provides such a lens array.
- the present invention can be applied to a projector that does not use a projector.
- the present invention uses a modulation device other than the liquid crystal panel, for example, a modulation device in which pixels are configured by micromirrors. It can also be applied to other projectors.
- transmission type means that a light valve such as a liquid crystal light valve transmits light
- reflection type means a type in which the light valve reflects light. Means that.
- the light valve can be composed of only a liquid crystal panel, and a pair of polarizing plates is not required.
- the cross dichroic prism is used as color light separation means to separate illumination light into red, green, and blue light, and recombines the modulated three-color light.
- a color light combining means that emits light in the same direction.
- a dichroic prism in which a plurality of dichroic prisms having a triangular or quadrangular prism shape are combined may be used. Even when the present invention is applied to a reflection type projector, it is possible to obtain substantially the same effect as that of a transmission type projector.
- the projector there are a front projector for projecting an image from a direction in which the projection surface is observed, and a rear projector for projecting an image from a side opposite to the direction in which the projection surface is observed. Applicable to both.
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Abstract
Description
Claims
Priority Applications (1)
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JP2005504961A JP3969449B2 (ja) | 2003-02-13 | 2004-02-09 | 光学部品用筐体、及びプロジェクタ |
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JP2003-035578 | 2003-02-13 | ||
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JP5268506B2 (ja) * | 2008-09-05 | 2013-08-21 | 三洋電機株式会社 | 投写型映像表示装置 |
JP5381466B2 (ja) * | 2009-07-30 | 2014-01-08 | セイコーエプソン株式会社 | プロジェクター |
JP2011075763A (ja) * | 2009-09-30 | 2011-04-14 | Sanyo Electric Co Ltd | 投写型映像表示装置 |
JP5471708B2 (ja) * | 2010-03-29 | 2014-04-16 | セイコーエプソン株式会社 | プロジェクター |
JP5407982B2 (ja) * | 2010-03-29 | 2014-02-05 | セイコーエプソン株式会社 | プロジェクター |
JP6604745B2 (ja) * | 2015-05-15 | 2019-11-13 | キヤノン株式会社 | 光変調素子ユニットおよび画像投射装置 |
DE112017002236T5 (de) * | 2016-04-27 | 2019-01-17 | Olympus Corporation | Kühlvorrichtung und endoskop-lichtquellenvorrichtung |
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JP2000019646A (ja) * | 1998-07-03 | 2000-01-21 | Hitachi Ltd | 光学装置 |
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JP3598825B2 (ja) | 1998-06-30 | 2004-12-08 | セイコーエプソン株式会社 | 投写型表示装置 |
JP4006833B2 (ja) * | 1998-07-03 | 2007-11-14 | 株式会社日立製作所 | 光学装置 |
US6641267B2 (en) * | 2001-02-15 | 2003-11-04 | Sony Corporation | Projection type display apparatus |
US6623125B2 (en) * | 2001-03-07 | 2003-09-23 | Delta Electronics, Inc. | Heat-dissipating device for liquid crystal display projector |
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- 2004-02-05 US US10/771,428 patent/US7073912B2/en not_active Expired - Fee Related
- 2004-02-09 JP JP2005504961A patent/JP3969449B2/ja not_active Expired - Fee Related
- 2004-02-09 WO PCT/JP2004/001341 patent/WO2004072726A1/ja active Application Filing
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JP2000019646A (ja) * | 1998-07-03 | 2000-01-21 | Hitachi Ltd | 光学装置 |
JP2002090875A (ja) * | 2000-09-18 | 2002-03-27 | Sony Corp | 投影型映像表示装置、電子機器およびその冷却装置 |
JP2002189251A (ja) * | 2000-12-20 | 2002-07-05 | Sony Corp | 投射型表示装置 |
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JP2009150975A (ja) * | 2007-12-19 | 2009-07-09 | Seiko Epson Corp | プロジェクタ |
JP2014059573A (ja) * | 2013-11-06 | 2014-04-03 | Seiko Epson Corp | プロジェクター |
JP2019142276A (ja) * | 2018-02-16 | 2019-08-29 | アルパイン株式会社 | 投影装置および前記投影装置を使用したヘッドアップディスプレイ装置 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2004072726A1 (ja) | 2006-06-01 |
US7073912B2 (en) | 2006-07-11 |
US20040223237A1 (en) | 2004-11-11 |
JP3969449B2 (ja) | 2007-09-05 |
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