Abstract: A simple cooling construction capable of achieving two functions at a time is to be provided, one function being cooling a lamp as a lighting means and the other function being preventing the scatter of broken pieces of the lamp upon burst of the lamp. An image display device such as an LCD projector has been configured such that cooling air is introduced into the interior of a reflector to cool an lamp means. In this connection, the present invention adopts a net of an expanded metal structure which serves as both means for preventing the scatter of broken pieces of a lamp upon burst of the lamp and an air deflecting plate facing a portion to be cooled. The above two functions can be attained simultaneously by such a simple construction.

Abstract: A projector for projecting an image to an external screen in which an optical unit, includes rectangular liquid crystal panels disposed such that the short sides thereof are substantially parallel with a plane including principal light beams of the respective color light beams to be composited by a prism. Transmission cables are drawn out from the short sides of the respective liquid crystal panels, and a cooling fan is disposed such that the direction of cooling air is approximately parallel with the long sides of the liquid crystal panels.

Abstract: A projection type display apparatus including a discharge lamp for supplying light, a light valve device and first and second air intake openings arranged on different sides of the apparatus. A centrifugal fan is associated with the first air intake opening so as to draw in outside air and form a first ventilation air flow from the first air intake opening through a lower side of the light valve device so as to cool the light valve device. A fan is associated with the second air intake opening so as to draw in outside air and form a second ventilation air flow so as to cool optical elements including lenses. An exhaust opening is arranged on a further side of the apparatus, and an exhaust is fan arranged proximate to a discharge lamp so as to draw out air including the first and second ventilation air flow therethrough.

Abstract: An integral reflector and heat sink for use in a projector assembly includes a reflector portion comprising an integrated heat sink; and a lamp receiving opening defined in the reflector portion.

Abstract: A projection cooling apparatus comprises a first cooling path and a second cooling path. The first cooling path includes a temperature sensor and an exhaust fan respectively installed in an inlet and an outlet of the first cooling path. The second cooling path includes a temperature sensor, a power supply unit, and a guiding fan. According to the detecting temperature resulted from the change of power supply and the environmental temperature, the temperature sensors of the first and second cooling path control the rotational speed of two sets of the fans to reach the best cooling effect, reduce the noises and extend the lifetime of the fan.

Abstract: An exhaust sirocco fan exhausts the air inside the projector outside. An inlet of the exhaust sirocco fan is disposed along the plane orthogonal to the optical path plane formed by the optical unit, i.e. along the thickness direction of the projector. In other words, the optical unit or the exhaust sirocco fan need not be disposed in the thickness direction of the projector in an overlapping manner. Therefore, by efficiently sucking the inside air, the exhaust efficiency can be enhanced and calmness can be ensured in the projector.

Abstract: An electro-optical apparatus encased in the mounting case includes an electro-optical device in which the light emitted from a light source is incident on an image display region, and a mounting case including a plate disposed to face one surface of the electro-optical device and a cover to cover the electro-optical device, a portion of the cover abutting against the plate, wherein the mounting case accommodates the electro-optical device by holding at least a portion of a peripheral region located at the circumference of the image display region of the electro-optical device with at least one of the plate and the cover. In addition, the cover has a surface area increasing portion to increase the surface area thereof.

Abstract: The invention provides a projector that can have a light source device, an optical device that modulates, in accordance with image information, beams emitted from the light source device to form an optical image, and an external case that accommodates the light source device and the optical device. The projector can enlarge and project the optical image formed by the optical device. The projector can include leg portions that are disposed so as to be extendable from and retractable to an outer peripheral surface of the external case to adjust the projection position of the enlarged and projected optical image, an intake opening formed in the surface of the external case disposed with the leg portions, and an intake fan that is disposed inside the external case near the intake opening and introduces cooling air from the outside of the external case. An intake surface of the intake fan can be disposed at an inclination with respect to the plane of the external case in which the intake opening is formed.

Abstract: There is a need for allowing an exhaust direction of a cooling air to be appropriately changed according to an installation environment of a projection type display device. There is another need to achieve a system for preventing an intake air and an exhaust air from being circulated therebetween by changing the direction of an intake port as well as an exhaust direction. A cooling system for an area around a lamp that accounts for a good part of an amount of heat generated by the projection type display device is isolated from a cooling system for other parts including a liquid crystal panel. Means is further provided of allowing the directions of intake and exhaust to be inverted in an entire device by changing the direction of rotation of an exhaust fan provided for the cooling system for the area around the lamp between forward and backward.

Abstract: An exhausting structure used in a rear projection TV has a ventilating chamber inside a casing of the TV to separate an optical engine from the casing. A fan is mounted in the ventilating chamber near the optical engine to ventilate the heat from the inside of the TV via a conduit and an outlet. The fan is isolated from outside of the TV to reduce any noise generated from the fan.

Abstract: In order to perform high efficient cooling without boiling cooling liquid and to improve maintainability such as replacement of a lamp, the present invention provides a liquid crystal projector including a light source lamp, a liquid crystal panel, a power source, a fan for removing heat generated by the power source and the lamp, a water-cooling jacket provided on an inner surface of an external wall portion opposed to the lamp in the liquid crystal projector, a metal pipe arrangement for radiation which is placed in the external wall portion, and a pump for driving cooling liquid to flow in the water-cooling jacket so that the cooling liquid receiving the heat from the lamp circulates in a circulation path through the water-cooling jacket, the metal pipe arrangement, and the pump to emit the heat to the outside through the metal pipe arrangement.

Abstract: An aspect of the invention provides a duct capable of cooling optical modulation systems with high efficiency while realizing miniaturization and reduction of the mounted number of cooling fans. The duct can be used for a projector including plural optical modulation systems, a dichroic prism, and a projection lens, and the respective optical modulation systems include liquid crystal panels, entrance side polarization plates, viewing angle correction plates, and exit side polarization plates. The duct can have plural air guide paths through which cooling air passes, a discharge opening, entrance side discharge openings, and exit side discharge openings formed in these air guide paths. With the optical modulation systems as targets of independent cooling, the entrance side discharge openings and the exit side discharge openings with respect to the targets of independent cooling are formed in different air guide paths.

Abstract: The invention provides a projector that is capable of efficiently cooling an outer case along with a light source device. The projector includes an outer case that accommodates a light source device and a cooling passage that is formed in the vicinity of the light source device to cool the outer case. Therefore, the inside of the outer case and the vicinity of the light source device are cooled by the cooling passage so as to cool the outer case efficiently. Also, since the cooling passage is arranged in the vicinity of the light source device, the light source device can also efficiently be cooled. As a result, a temperature rise in the light source device can be restrained so as to cool the outer case more efficiently.

Abstract: A cooling device (5) has a frame (51) as a chassis having a fan body (511) thereinside and a base portion (52) formed on the upper side of the frame (51), the frame (51) and the base portion (52) being made of a heat-conductive material. An object (44) to be cooled is fixed on the base portion (52) and heat is conducted from the object (44) to the base portion (52) where the conducted heat is radiated. The fan body (511) provided on the cooling device (5) blows a cooling air to cool the object (44). Accordingly, the heat on the object (44) is cooled by the cooling air blown by the fan body (511) and also by the heat-radiation by a heat radiator on the cooling device (5).

Abstract: A projector device adapted to project an image-forming beam using a lamp as a light source. The lamp is installed within a rectangular parallelepipedal housing, and an exhaust fan is disposed to the rear of the lamp. The top wall of the housing surrounding the lamp is given an opening pattern asymmetric about the optical axis of the lamp by forming an air inlet opening in a position deviated from the optical axis toward a direction orthogonal to the axis for producing a swirling air current within the housing by operating the exhaust fan. The lamp can be effectively cooled with reduced quantities of air.

Abstract: A display apparatus includes a light source, plural reflecting type light valves having a light incidence/reflection surface which reflects incident light from the light source, and a partition wall which partitions a space in the display apparatus into a cooling air side and a light incidence/reflection surface side. Plural cooling fans which cause air flow to respective ones of the light valves, and a discharge fan which discharges a cooling air inside of the display apparatus through an outlet port are provided. A respective one of the cooling fans flows air to a side which is opposite to the incidence/reflection surface of a respective one of the light valves and a path of the air flow is formed from at least one of the cooling fans to the outlet port in an order of the opposite side of the light valve, the light source and the discharge fan.

Abstract: A projector device adapted to project an image-forming beam using a lamp as a light source. The lamp is installed within a rectangular parallelepipedal housing, and an exhaust fan is disposed to the rear of the lamp. The top wall of the housing surrounding the lamp is given an opening pattern asymmetric about the optical axis of the lamp by forming an air inlet opening in a position deviated from the optical axis is toward a direction orthogonal to the axis for producing a swirling air current within the housing by operating the exhaust fan. The lamp can be effectively cooled with reduced quantities of air.

Abstract: In order to prevent dust from sticking to the LCD panel, to prevent the LCD panel from being heated and to suitably adjust the position of the LCD panel, a duct is provided between cooling means for a light source and cooling means for a LCD panel to send cooling air from the LCD panel side to the light source side. Therefore, a light incidence/reflection plane of the LCD panel is disposed in an almost hermetically closed space and an optical path from an integrator lens to the LCD panel is formed in the almost hermetically closed space.

Abstract: A pair of openings (302) symmetrically disposed around an optical axis of the reflector (412) is formed on a contact surface of a light-transmissive plate (301) and the reflector (412) and a cooling channel (340) for introducing cooling air to a source lamp (411) through the pair of openings (302) and a first and a second cooling channel shutters (350, 360) for shutting the cooling channel (340) when the case is detached from a projector (1) are provided on a case (300). The source lamp (411) can be efficiently cooled, so that the life of the source lamp (411) can be lengthened. Even when a light-emitting tube of the source lamp (411) is exploded while using the projector (1), the fragments of the light-emitting tube do not fall outside in exchanging the light source (413), and cooling efficiency of the source lamp (411) is not impaired.

Abstract: Disclosed is a cooling system for a projector which is capable of more quickly exhaust the hot air generated in the interior of the projector. A cooling system for a projector comprising a suction fan placed at the top of a synthesizing system of the projector, a fan guide fastened at a surface between the top of the synthesizing system and the bottom of the suction fan, the fan guide having a configuration in which one end is shorter the other so that the suction fan is place in a incline position to allow the hot air to be rapidly exhausted.

Abstract: A projection display according to the present invention reduces the size of a light beam in the optical path of an illumination optics from the periphery to change the amount of light incident on a video display device and the angle of such incidence, thereby making a plurality of image brightness/contrast combinations selectable. Further, the present invention changes the revolving speed of a projection display cooling fan and the adjustment value settings for the video display device's electrical characteristics in accordance with the aperture.

Abstract: A projector device adapted to project an image-forming beam using a lamp as a light source. The lamp is installed within a rectangular parallelepipedal housing, and an exhaust fan is disposed to the rear of the lamp. The top wall of the housing surrounding the lamp is given an opening pattern asymmetric about the optical axis of the lamp by forming an air inlet opening in a position deviated from the optical axis toward a direction orthogonal to the axis for producing a swirling air current within the housing by operating the exhaust fan. The lamp can be effectively cooled with reduced quantities of air.

Abstract: A projection display device comprises a light source, a display section configured to receive light from the light source and output image light modulated with an image signal, a projection device configured to project the image light output from the display section, a duct device having an air duct for conducting air from an air intake to an air discharge section and an air chamber which is formed downstream of the air discharge section in the air duct and configured to blow cooling air from the air discharge section toward the display section, and an air blower configured to blow cooling air into the air intake.

Abstract: An intake opening (132L) is formed on a left lateral side (132) of a lower cabinet (13) and an exhaust opening (132R) is formed on a right lateral side (132) in a rear projector (1), where a cooling air introduced from the intake opening (132L) by a plurality of fans provided in the lower cabinet (13) flows along a front side of a screen to cool the interior of the projector to be finally discharged from the exhaust opening (132R), so that the air after cooling the interior which is discharged by the exhaust opening (132R) is prevented from entering into the intake opening (132L), thereby always introducing fresh cooling air to cool the interior efficiently.

Abstract: A projective display apparatus having an illumination unit which includes a light source, an integrator lens and a collimator lens, a light splitter unit which splits light beams from the illumination unit into a plurality of color components, a plurality of light valves, a cooling fan, and a wind guiding unit. A respective one of the light valves corresponds to a respective one of the color components. The wind guiding unit guides the cooling wind from the cooling fan to the illumination unit and the light valves. The wind guiding unit splits and forms at least two branch wind guiding paths. One of the branch wind guiding paths guides cooling wind from the cooling fan to the illumination unit and another of the branch wind guiding paths guides the cooling wind to the light valves.

Abstract: An image projector that drops into the accessory slot of a luminaire and projects high quality images printed on plastic slides in full color and photographic detail for extended time periods without heat degradation. The projector comprises a cooling fan, infrared and ultraviolet light filter means, and an inexpensive and removable slide assembly comprising a plastic image slide, a protective film slide and at least one mounting plate. The cooling fan is combined with layered, reflective filters to create a protected environment for the plastic image slide to survive the extreme heat at the gate of today's efficient luminaires. The plastic image slide is created on a plastic sheet using conventional computer printing technologies.

Abstract: A display apparatus includes a light source, a reflecting type light valve having a light incidence/reflection surface which reflects incident light from the light source, a first cooling fan which cools the reflecting type light valve, and a second cooling fan which cools the light source. A part of the display apparatus which is opposite to the light incidence/reflection surface of the reflecting type light valve is cooled by a cooling fluid generated by the first cooling fan.

Abstract: A color separation/combination optical system according to the present invention comprises of a polarization beam splitter which performs at least one of separation of illumination light from a light source into light components for a plurality of colors and combination of light components for modulated by a plurality of image display elements, a plurality of temperature varying units which are disposed in opposition to or in contact with different surfaces of the polarization beam splitter and change the temperature of the polarization beam splitter, a temperature sensor which detects the temperature of the polarization beam splitter. The system also includes a control circuit controls the temperature varying units based on the temperature detected by the temperature sensor to prevent the action of birefringence caused by internal stress in an optical glass material constituting the polarization beam splitter from hindering a desired action of polarized light separation.

Abstract: The present invention comprises a lamp holder with a lamp inside a casing; at least one guiding surface at the lower edge proximate one side of the lamp holder; a ventilation outlet disposed on the lamp holder at a position corresponding to one side of the guiding surface proximate the casing; an upper sheet at the top of the lamp holder keeping a specific distance from the casing to define an upper air duct; a lower sheet at the bottom of the lamp holder keeping a specific distance from the casing to define a lower air duct and connecting to the guiding surface. A fan proximate one side of the guiding surface for blowing the air through the lamp holder and the upper and lower air ducts, then discharge the hot air from the ventilation outlet for the heat dispersion. Therefore, this invention reducing the temperature of the lamp which near the casing.

Abstract: This invention discloses a projection type image display apparatus that includes a color separation optical system which separates illumination light into a plurality of chromatic rays of light, a plurality of image forming panels illuminated with the plurality of chromatic rays of light, respectively, a color synthesizing optical system which synthesizes rays of light emitted from the plurality of image forming panels illuminated therewith, and a plurality of cooling units which cool areas around the plurality of image forming panels, respectively, in which a cooling capacity (for example, specifications of a cooling unit or type of air-blowing fan) of at least one of the plurality of cooling units is different from those of the other cooling units. Thereby, cooling can be carried out most suitably for each color optical path, and cooling that is superior in efficiency and in balance can be carried out.

Abstract: The present invention comprises a polarizer adhered on a flange plate at the top end of a L-shape base, an aslant surface on one side of the base, two sleeve screws protruded from the center of the aslant surface, an air duct defined between an upper base and a lower base of a Z-shape fixed base, two slots disposed on the lower base for receiving the sleeve screws, and two fixing bolts securing the washers onto the sleeve screw to limit the fixed base on the aslant surface of the base. A supporting surface is formed at a flange disposed downward at both ends of the upper base of the fixed base for gluing a half-wave plate. An adjusting mechanism protruded from the lower side of the fixed base extends into a recess at the lower end of the aslant surface; a screw hole is disposed on a side of the base and having an adjusting slot with its end propping one side of the adjusting mechanism; and an elastic member with its ends respectively fixed to a side of the base and a hole of the adjusting mechanism.

Abstract: In a display device comprising a suction fan for cooling and an air filter arranged on the suction side of the suction fan for cooling, there are provided means for calculating, in a case where the suction fan for cooling is driven, the integrated value of time periods during which the suction fan for cooling is driven, and means for displaying a warning message for causing a user to clean the air filter when the integrated value of the time periods during which the suction fan for cooling is driven is not less than a predetermined value.

Abstract: A method for thermal control of a lamp assembly which includes an arc lamp, fan and an associated reflector enclosed within a sealed module. The method includes providing a predetermined air flow path within said module whereby a continuous flow of ambient air is passed over said lamp during lamp operation which reduces the operating temperature of the lamp and increases lamp life, and further including an opening or vent adjacent to the fan which functions to reduce the fan temperature in operation thereby increasing the operating life of the fan.

Abstract: The invention provides a liquid crystal projector which can blast an increased amount of cooling air to raise the cooling efficiency without increasing the size of an optical prism unit. The liquid crystal projector includes a dichroic prism, a base for securing the dichroic prism with a lower plate interposed therebetween, a plurality of liquid crystal panel units disposed on side faces of the dichroic prism, and a cooling fan disposed below the base. The base has air holes formed therein such that air current generated by the cooling fan is introduced to the liquid crystal panel units through the air holes to cool the liquid crystal panel units. The lower plate has inclined faces at portions thereof which oppose to the air holes of the base.

Abstract: A heat-dissipating device for being used in a liquid crystal display projector having liquid crystal displays and polarizers is provided. The heat-dissipating device includes a heat-dissipating channel disposed under the liquid crystal displays and the polarizers and having a main path, a first branch, a second branch, and a plurality of vents corresponding to and adjacent to the liquid crystal displays and the polarizers, respectively, and a fan connected with an end of the heat-dissipating channel, wherein when an airflow is blown from the fan into the main path, the first branch and the second branch and discharged outwardly through the vents, heat generated from the liquid crystal displays and the polarizers is dissipated and temperatures around the liquid crystal displays are kept near isothermal.

Abstract: A display apparatus having a reflecting type light valve which has a light incidence/reflection surface, a drive circuit which drives the reflecting type light valve by supplying an image signal, a cooling system which cools at least the reflecting type light valve with cooling fluid, and a partition wall which partitions a space in the display apparatus into a cooling fluid side and a light incidence/reflection side. The reflecting type light valve forms a part of the partition wall, and the light incidence/reflection surface faces the light incidence/reflection side and a part opposite to the light incidence/reflection surface of the reflecting type light valve is cooled by the cooling system.

Abstract: A projector is provided that includes a cooling structure which efficiently cools an electrooptic device, and which can cope with an increase in brightness of a light source and a reduction in size of the projector. A cooling fan for introducing cooling air is mounted above an air inlet, and a regulating fan for regulating the cooling air introduced by the cooling fan is mounted at a position opposing the cooling fan across an electrooptic device. For this reason, the cooling air is formed in a substantially linear shape, and the electrooptic device can be uniformly and efficiently cooled without cooling only parts of the electrooptic device. This allows a cooling structure to be obtained which can cope with an increase in brightness of a light source lamp serving as a light source and a reduction in size of a projector.

Abstract: The invention provides an air intake on the upper plane of an exterior case which is opened upwards, and a cooling fan for introducing cooling air into the apparatus from the air intake is provided above an electro-optical device. There is no limit on the amount of air introduced, and sufficient cooling air for cooling the electro-optical device can be blown onto the electro-optical device. Accordingly, the electro-optical device can be cooled efficiently, and a cooling structure capable of dealing with high luminance of the light source lamp and reduction in size of the apparatus can be obtained.

Abstract: A projector includes a duct having a connecting end for connection to an air inlet provided in a housing, and an air intake end for drawing in outside air for cooling the interior of the projector. The duct is made of a soft or flexible material and is capable of altering its shape. Thus, the duct can change the position of the air intake end in space, for example, to different positions. Further, the duct is pivotable on a pivot axis, and thus can change the opening direction of the air intake end circumferentially about the pivot axis. Therefore, selection of the position and/or opening direction of the air intake end so as to draw in the outside air suitable for cooling the interior depending on the usage forms of the projector achieves efficient cooling of the interior of the projector.

Abstract: The present invention is a projection type projector apparatus which is provided with a light source portion, a light bulb and a cooler for cooling at least the light source portion, with a silencer which takes exhaust air from the cooler once to damp exhaust sound, and a mounting portion for attachably/detachably mounting the silencer to a projection type projector.

Abstract: A projection apparatus including an optical unit for magnifying and projecting an image by using light of a light source and a reflecting member for reflecting the projected image from the optical unit. This projected image is reflected by the reflecting member onto a rear surface of a screen. The projection apparatus further includes a housing containing the light source and which has a plurality of housing surfaces and an air exhausting member for discharging interior heat of the housing with the air exhausting member including an air passage. First and second aperture sections are provided on different housing surfaces from each other for exhausting air from the housing. These first and second aperture sections communicate with the same air passage but are respectively exhausting air from the same air passage in generally perpendicular air path directions.

Abstract: A projector includes a first housing, a second housing, and a sound insulating member. The first housing is provided with first heat-generating elements used for generating an image, first fans producing cooling airflows towards each one of the first heat-generating elements, and vents via which the cooling airflows heated by the first heat-generating elements are discharged. The second housing encloses the first housing, and has second fans discharging the cooling airflows outside the projector. The sound insulating member is provided on a path between the vents and the second fans so as to insulate sound produced by the first fans. The projector may be provided with a dust-proof member for the projecting lens.

Abstract: To provide a projector in which the quality of projected images does not deteriorate when the size of the projector is reduced. A light shielding member for shielding leakage light from gaps between each liquid crystal panel, and a crossed dichroic prism toward a projection lens side is provided. The leakage light from the gaps between each liquid crystal panel and the crossed dichroic prism can be shielded, and only the luminous flux emitted by the crossed dichroic prism can be applied to the projection lens, whereby the quality of projected images does not deteriorate when the device is reduced in size.

Abstract: The projection type display apparatus has liquid crystal panels with polarizers, a light source, a power supply, and a ballast. A cooling device is arranged in the apparatus such that a first set of cooling fans blow cooling air to cool the liquid crystal panels and the polarizers, and a second set of cooling fans suck the cooling air passing through the liquid crystal panels and the polarizers and blow the cooling air to independently cool the light source, the power supply, and the ballast. Therefore, a projection type display apparatus with little light leakage and low noise can be realized. The invention also provides a cooling unit, for the light source, which includes a movable lamp house and a duct with a cooling fan.

Abstract: A projection display device includes an optical unit, a cooling fan for cooling the circumference of light valves of the optical unit, and an exterior cabinet accommodating the optical unit and the cooling fan. The cooling fan is in the form of a sirocco fan. Cooling air of the cooling fan is brought to the circumference of the light valves through a duct, and is distributed by air-quantity controlling means arranged in the duct for effective cooling thereof.

Abstract: A projector includes an enclosing structure that encloses an optical path from an electrooptical device to a projection lens with a heat insulating member, and a thermoelectric transducer for cooling air inside the enclosing structure. Since the enclosing structure is formed by the heat insulating member, the electrooptical device can be efficiently cooled while thermally blocking between the inside and the outside thereof. Since being enclosed, the entry of dust or oil mist from the outside is prevented, and dust or oil mist does not adhere to the electrooptical device and the like.

Abstract: A projector is provided in which the production of an outer casing is facilitated, cooling efficiency is maintained well, and the outward appearance is preferable. A dustproof ventilating member is mounted in a clearance formed between the rim of an opening of a front casing forming an outer casing, and a projection lens. For this reason, cooling air can be reliably drawn into a device via the ventilating member. Since this eliminates the necessity for forming a meshed air inlet in the outer casing, the production of the outer casing is facilitated, and the manufacturing operation of the projector is easily performed. Moreover, cooling efficiency is maintained well, and the outward appearance is made preferable.

Abstract: A display apparatus of the projection type is improved in that, when a lamp valve breaks or is to be replaced, glass fragments and so forth thereof are prevented from being scattered into the inside of an outer housing of a projector apparatus through a cooling air intake port in a portion of the outer casing below the lamp valve and a comparatively small number of cooling fans are used to reduce the size and the weight of the overall display apparatus while optical modulation elements, a light source element and so forth can be forcibly cooled in a high efficiency. Cooling air blasted from an air blasting fan is blasted through an air blasting duct to three spatial optical modulation elements, a PS conversion element and a discharge lamp to forcibly air-cool the elements. A lamp box in which the light source is accommodated and which is removably mounted in an outer housing has a cooling air intake port through which cooling air is taken in to the light source.

Abstract: A display device, such as a reflecting type liquid crystal projector, in which dust is prevented from becoming attached to a reflecting type light valve, such as a liquid crystal panel, and an improvement in cooling effect are attained. The device has a structure having a partition wall for forming an enclosed space including at least an incidence/emission optical system of the reflecting type light valve. The reflecting type light valve is provided in the partition wall such that a light incidence/emission surface of the light valve faces into the side of the enclosed space. A part opposite to the light incidence/emission surface of the reflecting type light valve faces outside the enclosed space. In a structure where a cooling arrangement or a thermal conductive partition wall is connected to the part opposite to the light incidence emission surface, the cooling effect is further improved.

Abstract: A projector is provided that may include an enclosing structure for enclosing an optical path from an electro-optical apparatus to a projection lens, and an air circulation path connected to the enclosing structure and disposed in a flow path for cooling air. Thus, air inside the enclosing structure can be efficiently cooled while preventing the entry of dust or oil mist.