Abstract: A light source apparatus includes a light source, a first heat radiation unit configured to radiate heat from the light source, a wavelength conversion element configured to convert the light from the light source into light with a different wavelength, and a second heat radiation unit configured to radiate heat from the wavelength conversion element. The light source and the wavelength conversion element are disposed opposite to each other. A flowing direction of first cooling air flowing through the first heat radiation unit and a flowing direction of second cooling air flowing through the second heat radiation unit are same direction to each other.

Abstract: A projector includes an outer casing and a projection module. The outer casing has a front end surface, a projection opening, and at least one heat dissipation opening. The projection opening and the at least one heat dissipation opening are located at the front end surface. The projection module is disposed in the outer casing and includes a light source module configured to provide an illumination beam, a light valve configured to convert the illumination beam to an image beam, and a projection lens protruding from the front end surface and is configured to project the image beam out of the outer casing through the projection opening. The projection module is configured to rotate relative to the outer casing to change a projection direction of the image beam and may be embedded in a ceiling and present a better appearance, and the projection direction of the projector is less restricted.

Abstract: A projector includes a housing, a fan, a first heat dissipation fin group, a second heat dissipation fin group, and at least one heat generation assembly. The housing includes a first air entry, a second air entry, and a first air exit. The fan, the first and second heat dissipation fin groups, and the heat generation assembly are disposed in the housing. The fan is located between the first and second heat dissipation fin groups. The fan includes a first air inlet, a second air inlet, and an air outlet disposed corresponding to the first air exit. The first heat dissipation fin group is located between the first air entry and the first air inlet. The second heat dissipation fin group is located between the second air entry and the second air inlet. The heat generation assembly is connected to the first and second heat dissipation fin groups.

Abstract: A projector that modulates and projects light emitted from a light source includes an exterior housing configuring the exterior of the projector, a cooling target separably attached from the outside of the exterior housing, a cooling fan configured to deliver a cooling gas to the cooling target, and a channel forming member forming a part of a channel in which the cooling gas delivered from the cooling fan flows. In a state in which the cooling target is attached to the projector, the cooling target and the channel forming member form the channel. The cooling gas flows in the channel along the cooling target.

Abstract: A light source heat-dissipating device is disposed in a projection apparatus having a casing with an air inlet. The light source heat-dissipating device has a heat-dissipating fin assembly disposed in the casing and having an air intake side, and first and second heat-dissipating fin assemblies, a first air duct, and a fan adjacent to the first and second heat-dissipating fin assemblies. The second heat-dissipating fin assembly is stacked on the first one. The first heat-dissipating fin assembly is between the second one and the air inlet. The first air duct is adjacently-disposed at the air intake side, has a first entrance end connected with the air inlet and a first exit end opposite to the first entrance. The light source heat-dissipating device and projection apparatus improve temperature and life consistency between light source modules. The heat dissipation performances of the first and second heat-dissipating fin assemblies tend to be consistent.

Abstract: A display module of the present disclosure includes a display module main body and a housing. The display module main body includes a first, a second display element, and a prism. The housing includes a first, and a second frame. The first frame holds the first display element in a state in which the prism is positioned between a first and a second plate portion, and in which a third plate portion is in contact with the first display element and faces a first surface, and the second frame holds the second display element in a state in which the prism is positioned between a fourth and a fifth plate portion, and in which a sixth plate portion is in contact with the second display element and faces a second surface.

Abstract: A projector includes a light source, a light modulator, a projection optical apparatus, a cooler configured to cool a cooling target based on transformation of a refrigerant into a gas, and a dustproof enclosure accommodating the cooling target. The cooler includes a refrigerant generator configured to generate the refrigerant and a refrigerant sender configured to send the generated refrigerant toward the cooling target. Part of a wall part that forms the dustproof enclosure is a refrigerant transmissive section that maintains dust resistance of the dustproof enclosure and allows transmission of the refrigerant into the interior of the dustproof enclosure from the exterior thereof.

Abstract: A cooling system for controlling the temperature of a light valve of a projection system, the light valve being illuminated by a light source, the cooling system including a first sensor for measuring a first temperature of a first part of the light valve, at least one active heating and/or cooling device to transfer heat between the light valve and a heat source and/or sink, a controller for controlling the temperature of the light valve with the at least one active heating and/or cooling device according to the first temperature with respect to a reference temperature. The cooling system further includes a sensor for determining the amount of light absorbed by the light valve, and where the controller is further configured to control the active heating and/or cooling device based on the amount of light absorbed by the light valve.

Abstract: A mercury lamp cooling system includes a tilt sensor, a controller, a first and second blowers and a flow guiding structure. The flow guiding structure includes a first and second flow channel and two flow switch devices. The controller is electrically connected to the tilt sensor, the first and second blower and two flow switch devices. The first flow channel includes a first opening facing the first blower and a second and third opening facing the mercury lamp. The second flow channel includes a fourth opening facing the second blower and a fifth and sixth openings facing the mercury lamp. The controller controls the flow switch devices based on a tilt angle of a projector such that the air flow passes through at least one of the second and third opening and at least one of the fifth and sixth opening.

Abstract: A heat dissipation module includes a heat dissipation fin set. The heat dissipation fin set includes a plurality of heat dissipation fins, wherein these heat dissipation fins are stacked on each other, and each of the heat dissipation fins has a front side, a rear side opposite to the front side and at least one turbulent structure set. The turbulent structure set is located between the front side and the rear side and includes a plurality of first turbulent structures. The first turbulent structures are arranged from the front side to the rear side in sequence. A heat dissipation airflow flows from the front side toward the turbulent structure set along a flowing direction, and passes through the turbulent structure set to flow toward the rear side. An extending direction of each of the first turbulent structures is tilted relative to the flowing direction.

Abstract: A cooling assembly for cooling at least one light source of a light fixture is provided with at least a cooling fan configured to generate a cooling air flow; and at least with a flow-guiding element configured to convey the cooling air flow of the cooling fan and divide it into a primary flow adapted to mainly cool a first zone of the light source and at least a secondary flow adapted to mainly cool a second zone of the light source, at least partially distinct from the first zone.

Abstract: A projector includes a casing, an optic engine, a light module, a control circuit module, a first fan module, and a second fan module. The optic engine, the light module, the control circuit module, the first fan module, and the second fan module are disposed in the casing. The first fan module is an axial-flow fan module and has an air inlet and an air outlet. The air inlet is close to and toward the control circuit module; the air outlet is close to and toward the light module. The first fan module generates an air flow flowing through the control circuit module, the first fan module, and the light module in order. The second fan module has an air outlet close to the optic engine. Thereby, heat produced by the above-mentioned components of the projector in the casing can be dissipated efficiently.

Abstract: A projection apparatus includes a housing, a projection module, an electronic assembly and a heat dissipating module. The housing has first to fourth sides. The first and second sides are provided with air outlet and first air inlet respectively. A containing space is defined in the housing and has first and second areas. The heat dissipating module includes first to third heat dissipating members and first to second fans. The first, second, third heat dissipating members are connected to a light source module of the projection module. The first heat dissipating member is close to the air outlet. The second heat dissipating member is in the first area. The third heat dissipating member is in the first area and close to the second air inlet.

Abstract: A projection video display device, which enlarges and projects an image from an image-displaying means, has a housing and a raisable/lowerable mirror and a power supply, a light source, and a lens unit inside the housing. The raisable/lowerable mirror covers a projection-light opening formed in the top surface of the housing and able to rotate with respect to the housing, and has a convex mirror on the inside surface thereof. The raisable/lowerable mirror covering the top surface of the housing forms a smoothly connected, smooth, convexly curved surface with no height difference between the edge of the raisable/lowerable mirror and the front edge of the opening, and a half-bowl-shaped concavity is formed on at least one side of the raisable/lowerable mirror in the direction of the axis of rotation thereof.

Abstract: In order to cool the discharge lamp, cooling air generated by first and second cooling fans conveyed via first and second ducts into first and second lamp-cooling air inlets of the discharge lamp, and is blown into the discharge lamp. The first and second lamp-cooling air inlets are disposed so as to be symmetrical with respect to the optical axis of the discharge lamp, and are divided into a plurality of air inlets each having different opening surface areas. Having passes through the plurality of air inlets and diverging into a plurality of air currents, the cooling air is respectively blown to different parts of the discharge lamp. The rotational frequency of the first and second cooling fans is optimally controlled in accordance with the installation position (S) of the projector device.

Abstract: An image projection apparatus includes a light source, light from which is used to form an image to be projected, a first flow path, a control unit configured to control a light emission from the light source, an electrical power stabilizing unit configured to stabilize an electrical power to be supplied to the light source, and an electrical power source unit configured to supply the electrical power to at least one of the control unit and the electrical power stabilizing unit. One or both of the electrical power source unit and the electrical power stabilizing unit is/are divided into a plurality of boards. The light source is arranged on a normal line of a surface of any of the plurality of boards. The plurality of boards configure surfaces of the first flow path except a surface nearest to the light source.

Abstract: A projector includes a shell, a projection lens, an optical engine module, a power supply module a light source module and a fan. The shell defines an air inlet, an air outlet and forms a first room, a second room and a third room. The first room and the second room communicate with the air inlet. The third room communicates with the air outlet. The projection lens and the optical engine module are positioned in the first room. The power supply module is positioned in the second room. The light source module is positioned in the third room. Heated air in the first room can flows to the second room. Heated air in the second room can flows to the third room. The fan is positioned in the third room to expel heated air from within the shell.

Abstract: A projection apparatus includes: a housing which includes an intake vent formed in one side surface, and an exhaust vent formed in the other side surface; a first light source; a first heat radiating member which includes fins; a heat transfer pipe which connects the first light source and the first heat radiating member; a second light source; a second heat radiating member which includes fins; and a heat transfer pipe which connects the second light source and the second heat radiating member, wherein the first light source, first heat radiating member, first heat transfer pipe, second light source, second heat radiating member and second heat transfer pipe are housed in the housing, and the first heat radiating member and the second heat radiating member are disposed on a gas flow path substantially linearly connecting the intake vent and the exhaust vent.

Abstract: An animal feeder comprises a vertical portion having a front side, a back side, a left side, and a right side. A first groove extends continuously through each of the left side, the front side, and the right side. At least a part of the back side is generally concave to facilitate the securement of the feeder to a tree. An angular portion of the feeder extends from the vertical portion at an angle. The angular portion has a mouth with a stop. The vertical portion and the angular portion collectively define a cavity configured for retaining animal feed. The cavity is accessible at least at the mouth. The back side comprises a channel, a first bracket, and a second bracket, each of which are collectively configured for securement of a T-post.

Abstract: An image projection apparatus includes: a light source; an exhaust fan having a rotary shaft provided with at least one blade, the rotary shift being rotated to exhaust air inside the apparatus to the outside of the apparatus; a guide having a sloped face that is sloped toward the exhaust fan, the sloped face having a first side surface facing the light source and a second side surface provided opposite of the first side surface; a first flow path, defined by the first side surface of the guide, to guide air heated by the light source toward the rotary shaft of the exhaust fan; and a second flow path, defined by the second side surface of the guide, to guide air having temperature lower than temperature of the air heated by the light source, toward the rotary shaft of the exhaust fan.

Abstract: A pico projector system and an additional thermal dissipating method for the pico projector system are provided. The pico projector system includes a pico projector main body and a thermal dissipating module. The additional thermal dissipating method includes the steps of thermally dissipating the pico projector main body; externally connecting the thermal dissipating module to the pico projector main body; and thermally dissipating the pico projector main body by the thermal dissipating module.

Abstract: An image projection apparatus includes a light source unit including a light source detachable from a main body, an image forming part to form an image with a light from the light source, a projection optical system to project the image, an openable cover to open and close an opening formed for attaching and detaching the light source unit to and from the main body, an abutting member on which the light source unit abuts when the light source unit is attached to the main body, and a pressing member to press the light source unit to the abutting member, in conjunction with a fix operation of the openable cover to the main body.

Abstract: A projector includes an optical part including a light source section that outputs light, a light modulator that modulates the light outputted from the light source section based on an image signal, a projection optical section that projects the modulated light from the light modulator, a first fan that cools the optical part, and a fan controller that controls the first fan, and the fan controller operates the first fan intermittently when the light source section outputs light of luminance lower than luminance corresponding to normal image display.

Abstract: An image projection apparatus includes a light source, light from which is used to form an image to be projected, a first flow path, a control unit configured to control a light emission from the light source, an electrical power stabilizing unit configured to stabilize an electrical power to be supplied to the light source, and an electrical power source unit configured to supply the electrical power to at least one of the control unit and the electrical power stabilizing unit. One or both of the electrical power source unit and the electrical power stabilizing unit is/are divided into a plurality of boards. The light source is arranged on a normal line of a surface of any of the plurality of boards. The plurality of boards configure surfaces of the first flow path except a surface nearest to the light source.

Abstract: In a projection image displaying device which projects imaging light emitted from a projection lens by being reflected by a projection mirror, an air inlet for sucking external air is provided at the position of a sealing mechanism of the projection mirror. Air blown off through openings provided around the projection lens is sucked into a case through this air inlet. When a cooling operation of cooling components within the case is to be performed by sealing the projection mirror, a sucking operation through the air inlet is stopped. This prevents dust in the external air from adhering to a reflective surface of the projection mirror regardless of the installation state of the projection image displaying device.

Abstract: The invention describes a method of cooling a lamp (1) in a projector (2, 2?) independently of an orientation (Pdesk, Pceiling) of the projector (2, 2?), which method comprises directing a cooling airflow (4) symmetrically at a burner (10) of the lamp (1) during operation of the lamp (1); and controlling the cooling airflow (4) alternately between at least a first cooling level (C-I) and a second cooling level (C-II) such that, during cooling at the first cooling level (C-I), the temperature (Tbase) in a base region of the burner (10) drops below a predefined minimum operating temperature (Tmin) to allow a blackening of an inside wall (100) of the burner (10), and during cooling at the second cooling level (C-II), the temperature (Ttop) in an upper region of the burner (10) increases above a predefined maximum operating temperature (Tmax) and the temperature (Tbase) in the base region of the burner (10) increases above the predefined minimum operating temperature (Tmin) to facilitate a cleaning of the burner

Abstract: A projection display device projects light modulated based on a video signal. The projection display device includes a light source, a first fan for cooling the light source, and a second fan different from the first fan. The number of revolutions of the first fan is increased or decreased with the increase or decrease of the output of the light source. The number of revolutions of the second fan is decreased when the number of revolutions of the first fan is increased, and increased when the number of revolutions of the first fan is decreased.

Abstract: An image projection apparatus includes a light source; an intake port to take in low-temperature air into the image projection apparatus; an exhaust port to exhaust air from the image projection apparatus; a ventilation unit to generate an air flow from the intake port to the exhaust port; a first flow path for hot-air exhaust having increased its temperature by taking heat from the light source; a second flow path for a part of the low-temperature air, taken from the intake port; and a mixing unit to mix the hot-air exhaust flowing from the first flow path and the low-temperature air flowing from the second flow path. The air mixed and exhausted from the mixing unit converges with another part of the low-temperature air, flowing from a third flow path set outside the mixing unit, at a space between the mixing unit and the exhaust port.

Abstract: An image display device includes a light source; a power supply section that supplies power to light source; a cooling fan that cools the light source; an input section; a drive section that supplies a voltage to cooling fan; a control section that controls drive section and power supply section. The control section sets a first power value for the output of the power supply section and also a first voltage value for the output of the drive section. The control section measures a time at which the light source has been lighted. If the measured value exceeds a threshold, the control section gradually increases the output of the power supply section up to a second power value that is greater than the first voltage value over a predetermined time.

Abstract: An image projection apparatus for projecting an image on a projection plane includes a light source; a light source housing to encase the light source; a ventilation unit to send air to the light source; and a flow path set between the light source housing and a side face of the image projection apparatus. A part of the air sent to the light source, by using the ventilation unit, is flowed into the flow path.

Abstract: An image projection apparatus for projecting an image using light includes a light source configured to emit the light; and an operating unit configured to allow a user to operate the image projection apparatus, the operating unit being disposed above the light source when viewed from a placement surface on which a main body of the image projection apparatus is placed. The image projection apparatus also includes a first flow path in which air flows through the light source; and a second flow path different from the first flow path, the second flow path being formed between the light source and the operating unit.

Abstract: An image projection apparatus includes: a light source; an exhaust fan having a rotary shaft provided with at least one blade, the rotary shaft being rotated to exhaust air inside the apparatus to the outside of the apparatus; a guide having a sloped face that is sloped toward the exhaust fan, the sloped face having a first side surface facing the light source and a second side surface provided opposite of the first side surface; a first flow path, defined by the first side surface of the guide, to guide air heated by the light source toward the rotary shaft of the exhaust fan; and a second flow path, defined by the second side surface of the guide, to guide air having temperature lower than temperature of the air heated by the light source, toward the rotary shaft of the exhaust fan.

Abstract: An exhaust port shutter apparatus which is attached to an exhaust port of a projector, includes: a guide section in which a first guide groove is provided; louver boards each having a turning shaft pin, the louver boards in which each turning shaft pin is formed so as to have a length which allows the turning shaft pin to pass through the first guide groove and project to the outside of the guide section; and a cam roller that has a cam groove on a peripheral surface thereof, the cam groove into which each turning shaft pin fits, the cam roller that can reciprocate, by rotation thereof, each turning shaft pin by the cam groove along the first guide groove in a first direction, wherein the louver boards are rotated at a necessary angle as a result of the cam roller being rotated and open and close the exhaust port.

Abstract: An apparatus projecting or displaying images to a viewer. The apparatus or Pepper's ghost system projects or displays an image stream onto a reflective element with a first surface receiving and reflecting a portion of light associated with the image stream to the viewer and a second surface opposite the first surface. The apparatus includes a cleaning assembly including an air supply providing a volume of flowing air and an ionizing mechanism for receiving the flowing air and outputting an ionized air flow. The ionized air flow is directed over the second surface of the reflective element. The reflective element is positioned at a non-vertical display angle. An outlet of the cleaning assembly is positioned adjacent an upper edge of the reflective element, and the ionized air flow is output from nozzles as laminar air flow with a flow rate chosen to mitigate dust collection on the upper second surface.

Abstract: In order to cool the discharge lamp, cooling air generated by first and second cooling fans conveyed via first and second ducts into first and second lamp-cooling air inlets of the discharge lamp, and is blown into the discharge lamp. The first and second lamp-cooling air inlets are disposed so as to be symmetrical with respect to the optical axis of the discharge lamp, and are divided into a plurality of air inlets each having different opening surface areas. Having passes through the plurality of air inlets and diverging into a plurality of air currents, the cooling air is respectively blown to different parts of the discharge lamp. The rotational frequency of the first and second cooling fans is optimally controlled in accordance with the installation position (S) of the projector device.

Abstract: Methods and systems are provided for providing asymmetrical cooling for projectors. The projector can include two light assemblies, with each light assembly including a light source. The light assemblies are arranged horizontally adjacent to each other having both light assemblies facing in a direction of projected light from the light sources. On an outer side opposite the side adjacent to the other light assembly, each light assembly is accompanied by a pair of fans. One fan provides air to a top of the light assembly, and the other fan provides air to a bottom of the light assembly. More cooling air is provided to a top of the light assembly to cool a part of the light source that is hotter than the bottom part of the light source due to natural convection. The fan speeds can be varied based on a temperature measurement (e.g., using calibration tables) and/or based on other inputs.

Abstract: A projection-type display device having an improved structure to effectively cool an optical engine to generate light having image information and project the same onto a screen, and a driving circuit to drive the optical engine are provided. The display device includes a screen on which an image is formed, a stand to support the screen, an optical engine accommodated in the stand, the optical engine generating light having image information and projecting the light onto the screen, a first heat-radiating plate connected to a rear surface of the screen, and a driving circuit connected to a rear surface of the first heat-radiating plate, the driving circuit driving the optical engine.

Abstract: A light source module is adapted for a projection apparatus. The projection apparatus has a main board. The light source module includes a base, a lighting element, a flexible printed circuit, and a plurality of metal elastic elements. The base has a circuit layer. The lighting element is disposed on the base and electrically connected to the circuit layer. The flexible printed circuit is assembled on the base and electrically connected to the circuit layer. The metal elastic elements are adapted for being fixed to the main board to be contacted with the flexible printed circuit, such that the flexible printed circuit is electrically connected to the main board. The lighting element of the light source module is electrically connected to the main board via the flexible printed circuit and the metal elastic elements, such that a wiring space between the light source module and the main board is reduced.

Abstract: The present invention is directed to provide a light source apparatus that includes space-saving LED cooling unit, and a projector type image display apparatus including the same. The light source apparatus of the present invention includes a plurality of LEDs, a plurality of heatsinks that are respectively thermally coupled to the LEDs and that are disposed in series with an interval between each other, and a cooler mechanism that sends a cooling airflow into the heatsinks along their disposition direction. A heatsink included in the plurality of heatsinks that dissipates the heat of an LED having a greater heat generating amount out of the plurality of LEDs is disposed downstream in the cooling airflow from the other heatsink.

Abstract: A light source device includes a light emitting tube having a light emitting section configured to emit light, a first reflecting member configured to reflect the light emitted from the light emitting section, and a rectifying member disposed between the light emitting section and the first reflecting member, and configured to rectify a cooling fluid configured to cool the light emitting tube, and the rectifying member includes a rectifying surface configured to guide the cooling fluid flowing toward the rectifying member to the light emitting section, and a pair of standing surfaces standing from both ends of the rectifying surface.

Abstract: A projector includes an optical part including a light source section that outputs light, a light modulator that modulates the light outputted from the light source section based on an image signal, a projection optical section that projects the modulated light from the light modulator, a first fan that cools the optical part, and a fan controller that controls the first fan, and the fan controller operates the first fan intermittently when the light source section outputs light of luminance lower than luminance corresponding to normal image display.

Abstract: A projector includes a wireless device performing a predetermined function, an external housing which accommodates a light modulation device, a first controller, and the wireless device, an intake fan which introduces air outside the external housing into the external housing through an inlet port, an exhaust fan which discharges the air introduced into the external housing through the inlet port to the outside through an outlet port, a first channel which guides the air introduced through the inlet port toward the light modulation device by the drive of the intake fan, and a second channel which guides the air introduced into the external housing toward the exhaust fan via the wireless device by the drive of the exhaust fan.

Abstract: A projector includes: a cooling device which supplies cooling air to a cooling target, wherein the cooling device includes a plurality of cooling fans each of which discharges cooling air, and a plurality of ducts each one end of which is connected with the corresponding one of the plural cooling fans to introduce the cooling air toward the cooling target in directions different from each other, and the plural ducts communicate with each other at the other end and have an outlet port through which the cooling air flows out.

Abstract: A cooling device and a projection device comprising the same are provided. The projection device comprises a lamp and a cooling device. The lamp has a first side and a second side opposite the first side, and one of the two sides is the upper side of the lamp. The cooling device comprises a first blower and a second blower. The first blower is adapted to generate a first airflow towards the first side, while the second blower is adapted to generate a second airflow towards the second side.

Abstract: A projecting apparatus includes a chassis, an optical engine, a first fan set and a second fan set. The first fan set is disposed in the chassis and located at a first air outlet, and is configured to drive air to flow via a first air inlet into the chassis to form a first air flow. The first air flow flows out of the chassis via the first air outlet. The second fan set is disposed in the chassis and located at a second air outlet, and is configured to drive air to flow via the first air inlet into the chassis to form a second air flow. The second air flow flows out of the chassis via the second air outlet. A flow direction of the first air flow at the first air outlet is perpendicular to that of the second air flow at the second air outlet.

Abstract: An image projection apparatus includes a light source; an intake port to take in low-temperature air into the image projection apparatus; an exhaust port to exhaust air from the image projection apparatus; a first ventilation unit to generate an air flow from the intake port to the exhaust port; a first flow path for hot-air exhaust; a second flow path for a part of the low-temperature air, taken from the intake port; and a mixing unit to mix the hot-air exhaust flowing from the first flow path and the low-temperature air flowing from the second flow path; and a second ventilation unit to generate an air flow for the second flow path to the mixing unit. The air exhausted from the mixing unit converges with another part of the low-temperature air, flowing from a third flow path outside the mixing unit.

Abstract: A projector includes: a housing; an optical element accommodated in the housing; and an air supply unit configured to generate a flow of cooling air for cooling a cooling target element including the optical element, a dustproof area into which the cooling air can be introduced from the outside of the housing via a dustproof filter is formed inside the housing, the optical element is accommodated in the dustproof area of the housing, and the air supply unit includes a first air supply unit configured to introduce the cooling air from the outside of the housing to the dustproof area via the dustproof filter, and a second air supply unit accommodated in the dustproof area and configured to supply the cooling air introduced to the dustproof area by the first air supply unit toward the optical element.

Abstract: An image projection apparatus is disclosed which is capable of reducing noise when airflows from plural flow paths are taken in into a fan and exhausted therefrom. The apparatus comprises a first flow path through which a first airflow for cooling a light source passes, a second flow path through which a second airflow for cooling constituent parts other than the light source passes, a fan which exhausts air introduced from the first and second flow paths to the outside of the apparatus, a third flow path which introduces a third airflow to an exhaust area between the light source and the fan in the first flow path, and a light-shielding member which is provided in the exhaust area and shields the light from the light source.

Abstract: An image projection apparatus includes a light source, an image forming unit, a projection optical unit, a bottom surface, and an external connection unit. The light source emits light. The image forming unit forms an image with the emitted light. The projection optical unit is provided on an outer surface of the image projection apparatus closest to an external projection plane, and projects the formed image onto the external projection plane as projection light. The bottom surface is fixed to an external installation site to be substantially parallel thereto. The external connection unit is provided on the outer surface of the image projection apparatus closest to the external projection plane, on the same side as the bottom surface across a virtual horizontal plane passing through the center of the projection optical unit, and configured to be connected to a connection line for connection with an external device.

Abstract: A projection type display apparatus 50 includes: a plurality of light sources 100a and 100b; a light source control section 101 configured to control each of the plurality of light sources 100a and 100b; a plurality of fans 102a and 102b, provided to correspond to the plurality of light sources 100a and 100b, respectively, for cooling the corresponding light sources; and a fan diagnosis section 104 configured to diagnose a state of each of the plurality of fans 102a and 102b. When a malfunction of one of the plurality of fans 102a and 102b is detected by the fan diagnosis section 104 while the plurality of light sources 100a and 100b are lit up, the light source control section 101 turns off one of the light sources corresponding to the one fan and continues to light up the remainder of the light sources.