Abstract: The invention discloses an electronic apparatus and a projector by use of two passages formed in a casing for two air-flows passing through, each of which is generated by at least fan. Heat-dissipation devices are disposed in the passages substantially evenly so as to dissipate the heat generated in operation by an optical module disposed in the casing by the air-flows. The purpose of efficient usage of the apparatus space is therefore achieved. For the basis of special heat-dissipation requirement and assembly design, one of the fans is disposed between two of the heat-dissipation devices so that the two heat-dissipation devices could obtain better heat-dissipation efficiency; further, there could be an open space disposed between two of the heat-dissipation devices and adjacent to a light source of the optical module for the installation of the light source and the following installation of the fan, so that the whole volume of the electronic apparatus or the projector could be further reduced.

Abstract: An overheat prevention device comprises an inclination angle detector, a cooling module, and a control circuitry. The inclination detector is adapted to detect a first inclination angle and a second inclination angle, which an light source module is subject to relative to a reference plane, and transmit a first inclination signal and a second inclination signal, respectively. In response to the first inclination signal, the control circuitry alters the cooling module from a first operation mode to a second operation mode. In response to the second inclination signal, the control circuitry alters a projection apparatus from the first operation mode to the second operation mode.

Abstract: A direction control plate is fitted near an exhaust aperture of a lamp unit, and a partition plate is fitted so as to surround the front and the bottom of the exhaust aperture. The direction control plate is fitted so as to surround three sides of the periphery of the exhaust aperture in the shape of a letter “U”. Furthermore, the side plate is provided so as somewhat to close the exhaust aperture, and so as to be inclined by an angle ? towards the wall of a case. If a lamp within the lamp unit should break, the direction of scattering of the broken pieces is controlled by this direction control plate, and it is possible to prevent these broken pieces from being scattered to the exterior of the device, since the broken pieces can be made to collide with the partition plate.

Abstract: A projector apparatus equipped with a metal plate structure serving as a light shield against a light source and as a heat radiator is provided. The metal plate structure is arranged over the light source to hide the light source. The metal plate structure extends farther to a cooling fan and connects to the upper end of the air expiration face of the fan. The metal plate structure thus serves as the top plate of the baffle section of the exhaust duct of the fan for leading the air expired from the fan. The metal plate structure also serves as a shield plate, which can be connected to a grounded metal piece.

Abstract: A projecting device includes a casing, an optical engine, and a heat-dissipating mechanism. The casing includes a lower casing body and an upper casing body covering the lower casing body. The optical engine is disposed in the casing, and includes a light source module. The heat-dissipating mechanism includes a first blower disposed uprightly in the casing and adjacent to one side of the light source module for driving airflow to cool the light source module and the casing. The first blower has a thickness greater than one half of a length thereof and greater than one half of a width thereof. With the arrangement of the first blower, a sufficient amount of airflow is provided to the system to improve the heat-dissipating effect and to enhance system reliability.

Abstract: A projector includes: an optical component; a sealed structure that includes an optical component casing accommodating the optical component inside, a cooling device, a plurality of duct members including a flow-path-upstream-side duct member that guides the air from the cooling device to the optical component casing, and a ringed air flow passage defined by the duct members, the optical component casing including an air inlet for introducing air into the optical component casing and an air outlet for exhausting the air to an outside of the optical component casing, the cooling device including a thermoelectric conversion element having a heat absorbing surface that faces an inside of the sealed structure and a heat releasing surface that faces an outside of the sealed structure, the duct members introducing the air into the optical component casing via the air inlet and re-introducing the air that is exhausted from the inside to the outside of the optical component casing via the air outlet again into the op

Abstract: A projector having optical components, a power source unit, and a light source unit. The projector is capable of lowering its internal temperature utilizing: a first, second, and third fan (41, 42, 43) provided near the optical components for introducing external air from outside the projector to cool the optical components; and a fourth, fifth, and sixth exhaust fan (16, 17, 18). The fourth fan (16) blows the air that was taken in by the first, second, and third fan (41, 42, 43) and has cooled the optical components, onto the light source unit to further cool the light source unit. The fifth and sixth exhaust fans (17, 18) discharge the air that has cooled the light source unit and power supply unit out of the projector.

Abstract: A projector includes: a light source lamp; and a cooling device that cools the light source lamp and includes a plurality of cooling fans to deliver air toward the light source lamp. Airflow directions in which the plurality of cooling fans deliver the air toward the light source lamp are different from each other.

Abstract: A projection display device includes a light source having a light emitting portion, a reflector which reflects light emitted from the light emitting portion, and a fixing portion which fixedly mounts the light emitting portion with respect to the reflector.

Abstract: A video projector including a cooling current discharging structure capable of providing a high-speed cooling current and a low-speed cooling current to an optical component of an optical system serving as a cooling subject. The cooling current discharging structure discharges the high-speed cooling current toward a high-temperature region of the optical component and discharges the low-speed cooling current toward a low-temperature region having a relatively low temperature.

Abstract: A projection display device includes a first exhaust fan mainly for exhausting air from a light source and a second exhaust fan mainly for exhausting air from components other than the light source. The second exhaust fan is arranged on an exhaust side of the first exhaust fan so as to overlap partly the first exhaust fan. In addition, a distance between the first exhaust fan and the second exhaust fan is set within a section in variation characteristic of a noise level of the projection display device with respect to the distance, in which the noise level does not vary even with a change in the distance.

Abstract: The projection display device includes an imager unit which modulates light from a light source, and a cooling device which cools the imager unit. In this arrangement, the imager unit includes a red imager which modulates light in a red wavelength band, a green imager which modulates light in a green wavelength band, and a blue imager which modulates light in a blue wavelength band. Further, the cooling device includes cooling fans which supply a cooling air to the imager unit. The cooling device is configured in such a manner that at least one of the cooling fans is provided for each of the red imager, the green imager, and the blue imager, and a plurality of the cooling fans is provided for at least the green imager.

Abstract: The object of the invention is to realize highly efficient cooling by enhancing the heat transfer rate between optical parts and cooling air, and by simultaneously lowering the temperature of atmosphere around the optical parts. For this purpose, a first wind outlet for blowing a cooling wind is provided so as to allow the cooling wind to pass through optical parts, and furthermore, a second wind outlet for blowing another cooling wind so as to interfere with the cooling wind from the first wind outlet at the optical parts is provided at a location different from that of the first wind outlet.

Abstract: The invention discloses a method for igniting a lamp of a projector. The method includes steps of: (a) sensing a first temperature difference in response to power-off of the projector; (b) in response to power-on of the projector, detecting an aftercooling time and judging whether it is smaller than a predetermined cooling time, if YES, perform step (c); otherwise, perform step (g); (c) sensing a second temperature difference; (d) judging whether a ratio of the second temperature difference to the first temperature difference is larger than a threshold, if YES, perform step (e); otherwise, perform step (g); (e) calculating a re-cooling time; (f) controlling a fan to operate for the re-cooling time to cool the lamp down; and (g) igniting the lamp.

Abstract: The invention discloses a projector including a casing, an optical module, a light source module, a blowing fan, and an axial fan. The casing has a first air-outlet, a second air-outlet, and an air-inlet. The blowing fan and the axial fan are disposed corresponding to two sides of a light axis of the light source module respectively. When the blowing fan operates, an initial airflow into the casing from the air-inlet flows through the optical module and then a predetermined airflow generated by the blowing fan on a first air-outlet surface of the blowing fan cools the light source module. An angle is formed between the axial fan and one side of the casing. The axial fan directly sends the air around the light source module out of the casing through the first air-outlet and/or the second air-outlet.

Abstract: A blind (10) for a projector includes a bracket (20) mounted to the projector, and a folded fin (30) fixed on the bracket and covering a hot air vent of the projector. The folded fin includes a plurality of parallel fins (32) and a plurality of upper and lower tabs (34, 36) interconnecting the fins. Each of the fins defines an angle of 135 degrees with a plane defined by the lower tabs. Furthermore, a projection of each of the fins on the plane defined by the lower tabs overlaps a part of a corresponding adjacent fin. Thus, the blind can prevent a light leakage from the projector, while allow a heated airflow to be expelled out of the projector simultaneously.

Abstract: An image display apparatus has a first exhaust fan (13) for mainly exhausting air from a light source unit (9) and discharging the air to the outside of the image display apparatus and a second exhaust fan (14) for mainly exhausting air from a power supply unit (11) and discharging the air to the outside of said image display apparatus. The inspiration face of the second exhaust fan is arranged to partly overlap the expiration face of the first exhaust fan. Accordingly, the internal temperature of the image display apparatus, and hence the temperature of the exhaust air, can be efficiently reduced, and at the same time fan noise of the fans can be reduced. As a result, uprating of power of the light source unit and downsizing of an image display apparatus can be simultaneously achieved.

Abstract: The invention enables efficient cooling of: a light source providing source light; an optical system adapted to split the source light received from the light source into three primary colors R, G, and B; and a power supply unit for supplying electric power to various electric components installed in a casing of a projector apparatus. To do so, a first fan is arranged between the light source and the power supply unit such that its air inspiration face is directed to the power supply unit and its air expiration face is directed to the light source. Further, a second fan, adapted to inspire air from within the projector apparatus, is provided in the central area of the projector apparatus. On the air expiration side of the second fan is a cooling duct for cooling the light source and optical system.

Abstract: A projection type display apparatus includes a housing having a first side on which an air intake opening is arranged and a second side on which an air exhaust opening is arranged, a light source for supplying light, and a light valve device which modulates the light output from the light source. A first fan is provided which draws air from the air intake opening into the housing, and a first ventilation path is coupled with the air intake opening so as to lead air flow from the air intake opening toward a lower portion of the light valve. A second ventilation path is formed from the lower portion of the light valve to an upper portion of the light valve, and a second fan is provided which draws out air flowing from the second ventilation path through the air exhaust opening to outside of the housing.

Abstract: A method for controlling a dual lamp module applied to a projection apparatus is provided. The dual lamp module includes a first lamp and a second lamp. The method for controlling a dual lamp module includes providing a first operating power to the first lamp, and then determining whether the first lamp is turned on or not. If the first lamp fails to be turned on, stopping providing the first operating power to the first lamp, and providing a second operating power to the second lamp. The second operating power is greater than the first operating power.

Abstract: An illuminance device including a gas discharge lamp, an airflow generator, and a distributing duct is provided. The lamp has a reflector, a base connected to the reflector, a burner installed in the reflector, and the base, a first opening located at the reflector and a front part of the lamp, and a second opening located at a rear part of the lamp and exposing the burner. The distributing duct has an inlet, a first outlet, and a second outlet, and an opening area of the first outlet is larger than that of the second outlet. A cooling airflow provided by the airflow generator enters the distributing duct via the inlet, the distributing duct guides a part of the cooling airflow to the first opening via the first outlet, and the distributing duct guides another part of the cooling airflow to the second opening via the second outlet.

Abstract: A heat dissipation module includes a heat-absorbing unit, a first heat pipe, a second heat pipe, and a heat-dissipating unit. The heat-absorbing unit is adapted to contact the heat source thermally. The first heat pipe has a first heat-absorbing section being connected to the heat-absorbing unit and a first heat-dissipating section. The second heat pipe has a second heat-absorbing section being connected to the heat-absorbing unit and a second heat-dissipating section. The heat-dissipating unit includes a first fin assembly and a second fin assembly. The first heat-dissipating section is connected to the first fin assembly along a first extending direction, the second heat-dissipating section is connected to the second fin assembly along a second extending direction, the first extending direction and second extending direction are oblique to each other, and a part of the first fin assembly and a part of the second fin assembly are inset to each other.

Abstract: A projector includes: a casing having a surface; a cooling medium flowpath provided inside the casing, through which a cooling medium is allowed to flow; and a radiator in which a part of the cooling medium flowpath is arranged, the radiator being deployable by rotating with respect to the casing, and adapted to be accommodated in the casing and along the surface of the casing.

Abstract: A projector includes a light source; a light modulating device that modulates the flux of light emitted from the light source on the basis of image information to form an optical image; a projection optical system that projects the formed optical image; and an exterior housing that accommodates the light source, the light modulating device, and the projection optical system. An opening that introduces air from the outside of the exterior housing into the inside thereof is formed in the exterior housing. An object to be cooled, a duct connecting the opening to the objects to be cooled, and a filter purifying the air introduced from the opening are provided inside the exterior housing. A cooling fan that sucks the air having been purified through the filter and sends the air to the object to be cooled are provided in the duct.

Abstract: A lamp unit includes a reflector with a lamp mounted therein, a reflector holder holding the reflector, and an ejector member fixed to the reflector holder, for ejecting air to cool the lamp, the ejector member including an insertion member with a tubular stud inserted therein for supplying compressed air, a fluid passage forming member having a fluid passage for being supplied with air from the stud, and a hole defined in a distal end of the ejector member.

Abstract: A light-source cooling device is provided that, without adopting a complex configuration, is capable of reducing the temperature difference between the top portion and bottom portion of a light source despite change of the installation orientation. The light-source cooling device of the present invention for cooling a light source (11) is provided with: two ventilation ducts (4and 5) for guiding cooling airflows (13a and 13b) to strike against the light source (11) from opposite directions, and two fans (2and 3) for impelling the cooling airflows (13a and 13b) to two airflow guide units (4and 5).

Abstract: A projection apparatus comprises a housing and further comprises a light source, an imaging system, an optical engine, a first blower, and an axial fan installed in the housing, and an air outlet is disposed on the housing. The light source is installed adjacent to the air outlet. The optical engine is installed between the imaging system and the light source. The first blower is installed at one end far away from the air outlet, and an exhaust port of the first blower faces one portion of the light source. The axial fan is installed at one side of the light source installed the first blower, and the light source is positioned between the air outlet and the axial fan. An exhaust port of the axial fan faces the light source, and a suction port of the axial fan is adjacent to the suction port of the first blower.

Abstract: An improved projector device and the cooling device therefor are provided. The provided projector device includes a light source including a lead wire, a first foil having a first front-end and a first rear-end, and a second foil having a second front-end and a second rear-end, and includes a first blower configured on a first side of the light source and generating a first air to cool the bulb portion and the second foil of the light source, and a second blower configured on a second side of the light source and generating a second air to cool the lead wire as well as the first foil.

Abstract: A projector includes a first exhaust fan, a second exhaust fan, a casing, an optical engine, a circuitry system, and a projection lens module. The casing includes a front wall, a rear wall opposite to the front wall, a first sidewall, and a second sidewall opposite to the first sidewall. The first sidewall defines a first air inlet adjacent to the front wall and a second air inlet adjacent to the rear wall. The second sidewall defines a first and second air outlet aligned with the first and second air inlet respectively. The first and second exhaust fans are arranged corresponding to the first and second air outlet respectively. The projection lens module and the circuitry system are positioned in the casing between the first air inlet and the first air outlet. The optical engine is positioned in the casing between the second air inlet and the second air outlet.

Abstract: A duct was configured such that an incident side and an outgoing side of each of liquid crystal panels 34r, 34g, and 34b are formed with discharge ports r1 and r2, g1 and g2, and b1 and b2 to discharge the air from fans 41 to 43 through ducts 411 to 431, and at the same time, a PBS 28 for aligning the polarizing direction of the light from a light source lamp is formed with a discharge port p1 to discharge the air from the fan 43 through the duct 432, and an incident side discharge port b1 and an outgoing side discharge port b2 of the liquid crystal panel 34b corresponding to the blue light are formed with the ducts so as to discharge the air from the fans 43 and 41 which are different from each other. As a result, even when an amount of light per unit area of high luminance is increased, the liquid crystal panels and the polarizing plates and the PBS can be effectively cooled by three sets of the fans.

Abstract: A projection display apparatus of the present invention includes: a lamp power controller 13 changing the value of power supplied to super-high pressure mercury lamp 21; atmospheric pressure sensor 61 detecting the atmospheric pressure around where projection display apparatus 1 is installed; and correlation table storage 53 in which information on power supplied to the light source, set up corresponding to atmospheric pressure is stored. Lamp power controller 13, based on the previously stored information on power supplied to super-high pressure mercury lamp 21, set up corresponding to the atmospheric pressure, controls the power supplied to super-high pressure mercury lamp 21 in accordance with the atmospheric pressure detected by atmospheric pressure sensor 61.

Abstract: A compact projector includes a main control board, an optical engine positioned on the main control board, a heat dissipation assembly, a light source control board, and a digital-micromirror-device control board. The optical engine includes a light-shading member and a projection lens module. The light-shading member includes a first plate and a second plate. The first plate and the projection lens module are approximately perpendicular to the second plate to form a U-shape. The heat dissipation assembly is positioned adjacent to the first plate. The light source control board is positioned on one side of the main control board adjacent to the second plate. The digital-micromirror-device control board is positioned on one side of the main control board perpendicular to the light source control board.

Abstract: A light source module includes a lamp assembly, at least one temperature sensor for monitoring a temperature of the lamp assembly, and a processor coupled to the temperature sensor and the lamp assembly, the processor being configured to operate the lamp assembly at a reduced power level when the temperature is above a first temperature threshold.

Abstract: A silent cooling apparatus for effectively reducing the operating temperature of an electronic device includes a plurality of components which include surfaces opposite to each other with a spacing therebetween and have a heat generating spot on at least any of the surfaces opposite to each other, in a small and low-cost configuration. The apparatus for cooling a heat generating spot of an electronic device includes a cooling apparatus for forcedly air-cooling a heat generating spot of an electronic device which includes a plurality of components which are disposed side by side to have the same in-plane direction, and include heat generating spots within their surfaces. The cooling apparatus includes a first air cooling unit for feeding an air stream to the heat generating spot in an orientation of the in-plane direction, and a second air cooling unit for feeding an air stream to the heat generating spot in the in-plane direction in a different orientation from the air stream by the first air cooling unit.

Abstract: A projector includes a light source device; an exhaust fan configured to take air in the vicinity of the light source device in and discharge the same; a power supply device configured to supply electric power to components of the projector; an outer casing configured to accommodate the light source device and the power supply device in the interior thereof and provided with an exhaust port formed thereon; and a first duct configured to guide the air discharged from the exhaust fan to the exhaust port, and the power supply device includes a second duct configured to guide the air in the interior of the power supply device toward the first duct, and an air incoming port configured to take the air discharged from the second duct into the first duct is formed with the first duct.

Abstract: Disclosed is an image projecting apparatus having a cooling device, which cools heat generated from a plurality of light sources respectively emitting light of different colors and heat generated from a display device simultaneously, while effectively dispersing the heat. The image projecting apparatus includes a projecting system which projects light; a display device disposed in series with the projecting system; an optical system disposed in parallel with the projecting system, and including a plurality of light sources which transmit the light to the display device and generate heat when the light is transmitted to the display device; a heat dissipation device disposed at an outer edge of the optical system which dissipates the heat generated from the plurality of light sources; and a cooling fan disposed opposite to the display device, which inhales air and discharges the air to the heat dissipation device.

Abstract: A liquid crystal projector device of the present invention includes a casing having disposed therein a lamp unit, an optical system for receiving light from the lamp unit to generate image light, and a power unit. An exhaust system for cooling an inside of the casing is attached to a side surface of the casing. The exhaust system includes a first exhaust fan and a second exhaust fan, which stand along the side surface of the casing. The first exhaust fan is placed toward the lamp unit, while the second exhaust fan is placed toward the power unit. Exhaust directions of both exhaust fans intersect each other.

Abstract: A projection apparatus includes a projector including a cooling fan which cools the inside of a main unit through an air hole provided in the main unit and ceiling hanging hardware including a bracket having an external cooling fan which faces the air hole and whose air-flow direction coincides with that of the air hole. The projector is mounted on the ceiling hanging hardware while hanging from the ceiling hanging hardware.

Abstract: An image projection apparatus includes a lamp, an air duct configured to lead air from a cooling fan to the inside of a reflector of the lamp, an exhaust duct configured to lead first air, second air, and third air to an exhaust port formed in a housing of the image projection apparatus, the first air passing the inside of the reflector, the second air being drawn from a first inlet port in the housing and passing an area that faces an outer surface of the reflector, and the third air being drawn from a second inlet port formed in the housing, wherein a first area that blends the first air with the third air, and a second area that blends blended area from the first area with the second air and leads resultant air to the exhaust port are provided inside of the exhaust duct.

Abstract: A projecting system including a light source module, a flow-conducting member, and a blower is provided. The flow-conducting member includes a hollow body, and at least one part of the light source module is disposed in the body. The body has an inlet and an outlet. The blower is adjacent to the inlet and used for blowing a flow toward the inlet along a first direction. The flow will leave the outlet along a second direction different from the first direction. Utilizing the flow-conducting method and disposition for fans/blowers according to the invention, even if plural light sources are disposed adjacent to each other, the heat generated by the light sources can be effectively dissipated.

Abstract: A projector includes a light source, a color wheel, and a Digital Mirror Device. The color wheel is configured for providing rapid color changes in light emitted from the light source. The Digital Mirror Device is configured for forming an optical image according to image information by using light emitted from the light source. The projector includes a first airflow channel and a second airflow channel. The first airflow channel is configured for cooling the light source and the color wheel. The second airflow channel is configured for cooling the Digital Mirror Device. The first airflow channel and the second airflow channel are independent to each other. A method for cooling a projector using zone cooling is also provided.

Abstract: A projection-type image display device includes three light sources respectively configured to emit a different colored outgoing light, a light combining unit configured to combine outgoing lights, and a projection unit configured to project a combined light combined by the light combining it. The projection-type image display device includes a first cooler configured to cool a first light source of the three light sources, and a second cooler configured to cool a second and a third light source of the three light sources except the first light source.

Abstract: A wind velocity measuring device is used in an electronic apparatus including cooled objects and cooling fans for cooling the cooled objects and measures a wind velocity of air blown to the cooled objects. The wind velocity measuring device includes a wind velocity measuring unit that measures a wind velocity of air, and an air circulating unit that circulates a portion of the air blown to the cooled objects. The air circulating unit includes barrier portions that extend to cross a circulation direction of the air at a front stage side of the circulation direction of the air, and an exhaust port that discharges inner air to the outside and is formed at a rear stage side of the circulating direction of the air, and the wind velocity measuring unit measures a wind velocity of the air between the barrier portions and the exhaust port in the air circulating unit.

Abstract: There is provided a cooling system of a projection system including: a division plate dividing an inside space of the projection system into a light projecting space and an optical engine housing space; a first fan sucking air of the light projecting space into the optical engine housing space; a composition unit passing air before sucking the air to the first fan; and a second fan discharging air discharged from at least first fan to the outside. Therefore, the cooling of the projection system is smoothly performed and injection of foreign substance and deterioration of image quality are prevented.

Abstract: A projection type display apparatus includes a housing having a first side on which an air intake opening is arranged and a second side on which an air exhaust opening is arranged, a light source for supplying light, and a light valve device which modulates the light output from the light source. A first fan is provided which draws air from the air intake opening into the housing, and a first ventilation path is coupled with the air intake opening so as to lead air flow from the air intake opening toward a lower portion of the light valve. A second ventilation path is formed from the lower portion of the light valve to an upper portion of the light valve, and a second fan is provided which draws out air flowing from the second ventilation path through the air exhaust opening to outside of the housing.

Abstract: A projecting apparatus cooling structure is provided in which a discharge lamp can be always kept at an appropriate temperature whether the projecting apparatus is horizontally installed on a flat surface for forward projection or for downward projection or suspended from the ceiling for forward projection or for upward projection, so that the reliability and safety of the discharge lamp is improved and so that the life of the discharge lamp can be extended. The projecting apparatus projects an image for display using a discharge lamp as a light source.

Abstract: A projection kiosk for a multi-projector digital signage system includes an enclosure and a frame disposed therein. The frame includes attachment points which can hold in position a plurality of projectors. The projectors may be aligned with sub-pixel-resolution accuracy to enable projection of pixel-aligned images onto a screen. The enclosure includes a heat ducting subsystem configured to direct air into the enclosure, duct air through the projectors, and discharge air away from a projection path between the plurality of projectors and the screen.

Abstract: A projecting device includes a casing, an optical engine, and a heat-dissipating mechanism. The casing includes a lower casing body and an upper casing body covering the lower casing body. The optical engine is disposed in the casing, and includes a light source module. The heat-dissipating mechanism includes a first blower disposed uprightly in the casing and adjacent to one side of the light source module for driving airflow to cool the light source module and the casing. The first blower has a thickness greater than one half of a length thereof and greater than one half of a width thereof. With the arrangement of the first blower, a sufficient amount of airflow is provided to the system to improve the heat-dissipating effect and to enhance system reliability.

Abstract: An illuminant module includes a lamp including a lampwick, a reflector and a guide cap, a lamp holder, a blower, and an axial fan. At least one portion of the lampwick is disposed in the reflector. The guide cap having a guide wall, a first air outlet, and a first air inlet is connected to the reflector and covers an opening of the reflector. The lamp holder has a space where the lamp is disposed, a second air inlet corresponding to the first one, a third air inlet adjacent to the second one, a fourth air inlet adjacent to the third one, a second air outlet corresponding to the first one, and a third air outlet adjacent to the second one. The blower outside the space is disposed at the second air inlet. The axial fan outside the space is disposed adjacent to the third and fourth air inlets.

Abstract: A cooling device which prevents ambient persons from being exposed to an unpleasant feeling as much as possible by properly controlling an exhausting direction of the air which is used for cooling and exhausted from a chassis and an image projection apparatus having the cooling device are obtained. The cooing device cools first and second members to be cooled provided in the chassis, has first and second exhaust fans for guiding winds which have cooled the respective first and second members to an outside of the chassis, and is characterized in that the first and second exhaust fans are arranged so as to face the same surface of the chassis and the winds exhausted from the first and second exhaust fans are mixed.