Abstract: A projector includes a light source, a pump which supplies a compressed gas to cool the light source, and an ejector member having a hole, in which, a tube connects the pump to the ejector member, the compressed gas is discharged from the hole, and a diameter of the hole is in a range from 0.2 mm to 0.4 mm.

Abstract: A projection display device may include a housing which can be placed on a placing face with a lower face portion thereof distanced from the placing face; a fan, disposed within the housing, to suction from a first air inlet formed in the lower face portion; a filter detachably provided to the housing the as to close off the first air inlet; and a filter replacement access lid detachably provided to the housing so as to cover the filter closing off the first air only from the placing face side, with a second air inlet for suctioning of the fan provided in the filter replacement access lid; wherein the filter replacement access lid may be formed so as to protrude toward the placing face side from the lower face portion; and wherein the second air inlet may be formed in a face of the filter replacement access lid intersecting the lower face portion.

Abstract: Elements of an optical system (12) of a projection type image display apparatus are stored in an optical system storage (46) having an upper opening in such a way that the optical element to be arranged close to a light source is fitted in the frame provided in the high-temperature region of the optical system storage (46) close to the light source, while the rest of the optical elements are respectively fitted in the frames in the low-temperature region of the optical system storage (46) remote from the light source. The upper opening in the high-temperature region is covered, in the low-temperature region, with a resilient metal lid (471), and, in the low-temperature region, covered with a resilient resin lid (472).

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 image display apparatus of the invention has a lamp mounting mechanism, which has an aluminum lamp holder (166) intervening between the lamp (16) and the resin lamp holder (167) and has a section exposed out of the resin lamp holder (167). The lamp (16) is securely fixed in position on the aluminum lamp holder (166) by mounting the lamp (16) on the aluminum lamp holder (166) from above and then folding the top section (166d) towards the top end of the lamp (16). This lamp mounting mechanism can suppress the temperature of the resin lamp holder without providing a cooling fan with a large amount of power and suppress fan noise, thereby simultaneously enabling uprating of the power of the lamp and downsizing of the image display apparatus.

Abstract: The invention discloses a projector including a light-source device, a guiding passage, and a fan. The light-source device includes a light-source lamp for emitting light. The guiding passage has an outlet and an inlet. There is a block disposed in the vicinity of the outlet. The outlet of the guiding passage is connected to the light-source device, and the inlet of the guiding passage is connected to the fan. The fan blows an air flow into the guiding passage. When the air flow passes through the block disposed in the vicinity of the outlet, the air flow will be divided into a first air flow and a second air flow. Afterward, the first air flow cools a first portion of the light-source device, and the second air flow cools a second portion of the light-source device. Accordingly, temperature of the light-source lamp can be stably maintained.

Abstract: A filter unit includes: a feeding shaft 24 around which an unused part of a roll filter 18 is wound; a take-up shaft 25 for taking up the filter from the feeding shaft; a motor 40 for rotating and driving the take-up shaft so as to take up the filter; a filter unit housing 26 for housing the feeding shaft and the take-up shaft and including, between the both shafts, an opening for exposing the filter; rotation detection patterns 42 that rotate in connection with transfer of the filter caused by taking up the filter and are placed at predetermined intervals in a circumferential direction in which the rotation detection patterns rotate; a pattern sensor 43 for detecting rotation of the rotation detection patterns and outputting a detection signal whose amplitude fluctuates in accordance with the predetermined intervals; and a used filter amount detecting unit for detecting a used amount of the filter based on a correspondence between a period at which the amplitude of the detection signal fluctuates and an amou

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: 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 cooling device with a thermoelectric conversion element having a heat absorbing surface and a heat releasing surface includes: a heat-absorbing-side heat conductive member connected with the heat absorbing surface in a heat-conductive manner; a heat-releasing-side heat conductive member connected with the heat releasing surface in a heat-conductive manner; a plurality of heat-absorbing-side fin members that is disposed to the heat-absorbing-side heat conductive member, protrudes in an out-of-plane direction from an end surface remote from the heat absorbing surface and extends in a predetermined direction; and a plurality of heat-releasing-side fin members that is disposed to the heat-releasing-side heat conductive member, protrudes in an out-of-plane direction from an end surface remote from the heat releasing surface and extends in a predetermined direction intersecting with the plurality of heat-absorbing-side fin members in plan view.

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 projection display apparatus includes: a light source; a light source control unit that controls starting and shutting-off of the light source; a cooling air generator that generates cooling air for cooling the light source in a selective manner in accordance with the degree of cooling capability expressed in a plurality of levels; and a cooling control unit that instructs the cooling air generator to generate cooling air having a degree of cooling capability higher than that at a regular level in response to the situation in which the light source control unit fails to start the light source.

Abstract: A light source device, includes: an arc tube, and a pair of sealing portions; a reflector; and a sub mirror configured to reflect the light emitted from the arc tube toward the arc tube, and disposed of the other side of the sealing portion in such a manner as to cover a part of the outer surface of the tube spherical portion of the side of the illumination area, the sub mirror include a plurality of reflection members provided with reflection surfaces having different shapes, and the distance between the illumination axis and the outer shape of one of the adjoining reflection members is different from the distance between the illumination axis and the other of the adjoining reflection members.

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 projector includes: a lighting device which includes a light source unit for emitting illumination light, and a light control device for controlling the amount of illumination light passing through the light control device by shielding a part of the light from the light source unit; a light modulation unit illuminated by illumination light emitted from the lighting device; and a projection system which projects image light having passed the light modulation unit, the lighting device has an air supply device configured to cool the light control device by cooling air supplied from the air supply device to a cross flow path which crosses an optical path passing the light control device.

Abstract: A projection-type display device includes a housing, at least a part of which has a hollow wall, and a light source, a light valve, a projection optical system, a reflection mirror, and a screen all disposed in a single, common housing space in the housing. In addition, a first air guide path, provided between the light source and the hollow wall, guides hot air generated by the light source directly to the hollow wall.

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: The present invention provides a projection type display unit including a light source, an optical unit including a light valve and a projection lens, and a cooling section for cooling the light source and the optical unit. The light source and the optical unit as well as the cooling section are incorporated in an armor cabinet. A highly heat conductive sheet metal component part is disposed in a space between a lamp as the light source and the armor cabinet.

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 device-of the present invention includes a light blocking mechanism for blocking leak light from a lamp unit. The light blocking mechanism includes a first light blocking member having a plurality of first light blocking plates arranged therein at certain pitches, and a second light blocking member having a plurality of second light blocking plates arranged therein at certain pitches. The first light blocking plates and the second light blocking plates each define a gap providing an air flow passage. A flat inclined part of each second light blocking plate extends in an inverted direction to a flat inclined part of each first light blocking plate, with a predetermined angle of inclination, so that the first light blocking plates and the second light blocking plates block the light emitted from the lamp unit toward a vent of a casing in all orientations.

Abstract: An object is to provide a light-source lamp capable of reducing consumption power while ensuring a certain luminance level and a projector using the light-source lamp. This light-source lamp 1 gathers light from a light source at a lens for emission. The light sources 3, 6 are formed of a plurality of arranged light-emitting diodes 32, 62, and the light sources 3, 6 are driven with pulse-width modulation control of the light-emitting diodes 32, 62. With this, compared with a configuration in which the light sources 3, 6 are subjected to analog control, consumption power of the lamp can be reduced while ensuring a certain luminance level lm.

Abstract: A video projector including a housing which accommodates a component for projecting and displaying a picture. A cable insertion member is fastenable to an antitheft cable. The cable insertion member is retractable into the housing.

Abstract: A structure for protecting a rod integrator that is used for a projection display apparatus is provided. The structure has: a protecting tube for the rod integrator, the protecting tube accommodating the rod integrator therein, wherein the protecting tube has openings which are defined at positions that face a light incident surface and a light exiting surface of the rod integrator, respectively; and a light shield plate that is provided between the opening and a light source for emitting light to the rod integrator, the opening facing the light incident surface of the rod integrator, wherein the light shield plate has an opening for allowing light to pass therethrough so that the light is incident on the rod integrator.

Abstract: A cabinet of a projection type display unit includes a base cabinet on which main component parts are mounted, and a top cover made from sheet metal which is mounted so as to cover the base cabinet, wherein a rear face portion of the top cover is formed in the shape of a curved surface being laid-down U-shaped in side view. The U-shaped curved surface is formed on an ergonomic basis, so that the rear face portion can be gripped securely even with one hand. On the back side of the top cover, bosses are integrally formed by use of a resin which is a different material from the sheet metal of the top cover, and the base cabinet and the top cover are fixed by fastening screws to the bosses from the base cabinet side.

Abstract: A housing (17) that accommodates a light source (1), a display device (3), etc. has an intake aperture (18) and an exhaust aperture (24). A blowing unit (16, 23) sucks air in through the intake aperture and expels air out through the exhaust aperture. A filter unit (19) is disposed so that a filter (20) faces the intake aperture in a predetermined area between a rolling shaft (31a) and a take-up shaft (31b). A part of the filter facing the intake aperture is renewed by taking-up the filter from the rolling shaft onto the take-up shaft. A control unit (36) performs control so as to renew the filter for a range that is smaller than an opening area of the intake aperture, when a predetermined renewal condition is determined to be satisfied, based on the output of a detection unit (38, 39a, 39b) that detects a specific factor value relating to contamination of the filter, such as a cumulative display time, a temperature, an air pressure, etc.

Abstract: There are provided a projector which is capable of managing the temperature of the light source highly accurately, and a method of cooling the light source of a projector. The projector includes light source means 2 for emitting light for projecting an image, holding means 4 for holding air, holding means 4 including air discharging means 4b directed toward light source means 2, air pump means 3 for holding air in holding means 4 and compressing air in holding means 4, pressure detecting means 5 for detecting a pressure in holding means 4, and control means 7 for controlling operation of air pump means 3 based on the pressure detected by pressure detecting means 5.

Abstract: There is disclosed a projector capable of efficiently cooling an optical element while decreasing the generation of noise as much as possible. A projector P includes a main body 1 provided with a light source 2, an optical element 4 (liquid crystal panels 5, 6 and 7, polarization plates 8A, 8B and a prism 25) which processes (modulates) light emitted from this light source 2 in accordance with image information and a projection lens 9 which projects a modulated projection optical image onto a screen, and further includes a cooling apparatus 10 in which a compressor 12, a radiator 14, a capillary tube 16 (a pressure reducing unit) and an evaporator 18 provided in the main body 1 constitute a refrigerant circuit, and air subjected to heat exchange between the air and the evaporator 18 is supplied to the liquid crystal panels 5, 6 and 7 to cool the panels.

Abstract: A filtering unit for receiving an electronic device. The filtering unit includes a housing, a filter, a fan, a detector, and a controller. The housing includes an inlet. The filter is disposed at the inlet of the housing. The fan is disposed in the housing. The detector detects the number of particles in the filter. The controller is coupled to the fan and the detector. When the number of the particles in the filter exceeds a threshold value, the detector outputs a signal to the controller to change the rotating direction of the fan.

Abstract: Methods and apparatus are disclosed for maximizing performance of an electronic device, such as a display device. Aspects of the exemplary embodiments include operating the electronic device by adjusting power to the device to maintain a predetermined junction temperature of the device independent of the ambient temperature at which the device is operating.

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 powder dust capture device includes a main body housing (17) having an air intake (18) in which a powder dust capture unit (19) is provided, and a blowing unit (16) for drawing air in from the air intake via the powder dust capture unit, passing the air through a predetermined area, and expelling the air out from an exhaust (24). The powder dust capture unit includes a filter unit (30), a filter feeding mechanism and a filter feed control unit. The filter unit includes an electrostatic filter (20) wound around a rolling shaft (31a), a filter take-up shaft (31b), and a small housing (32) storing them. The filter unit is attachable/removable with respect to the main body housing. The small housing has an aperture part (33) for drawing in air through the electrostatic filter. The filter feed control unit has a filter feed amount detection unit (35, 42), and controls a filter feeding operation performed by the filter feeding mechanism, based on detection output from the filter feed amount detection unit.

Abstract: A spatial light modulation device includes: a light modulation unit which modulates light according to an image signal; and a first electrode and a second electrode provided on a surface of one of an optical element disposed either on the entrance side of the light modulation unit or the exit side of the light modulation unit and the light modulation unit. Voltage is applied to the first electrodes and the second electrodes.

Abstract: A projection type display apparatus includes a plurality of light sources 7a-7d, a display device unit 5, a light-combining unit 3 that combines output light from the plural light sources, a condensing unit 4 that propagates output light from the light-combining unit to the display device unit, and a projecting unit 6 that projects an image by the use of output light from the display device unit. In the projection type display apparatus, cooling units having fans 21a-21d are disposed respectively on the plural light sources, and a controlling unit 31 is provided to control the cooling units. Information regarding the lighting state of the plural light sources is inputted into the controlling unit, and the controlling unit controls a rotation rate of the fans of the cooling units with reference to the information.

Abstract: A lighting unit is described which has a discharge lamp (1), in particular a high pressure or high intensity discharge (HID) lamp or an ultra high performance (UHP) lamp, a lamp driver (2) and a cooling device (3). To reduce mechanical stresses caused by temperature variations in the lamp (1), one or more operating parameters of the lamp (1) are detected. In addition, a control unit is provided for controlling the lamp driver (2) and/or the cooling device (3) at least during switching on and/or off of the lighting unit in such a way that there is no excursion from a predetermined range of the at least one operating parameter. By selecting the parameter range suitably, the service life of the lamp may be extended considerably or the power of the lamp may be increased while the service life remains the same.

Abstract: An illuminating device adapted to a projecting apparatus including a lamp module, a power module, and a fan is provided. The lamp module is separately disposed in the projecting apparatus. The lamp module has a lamp, an igniting module and a plate. The igniting module is capable of generating a high voltage signal to drive the lamp. The plate is disposed between the lamp and the igniting module for shielding radiating heat generated by the lamp. The power module is capable of generating a low voltage signal transmitted to the igniting module through a low voltage power line. The igniting module transforms the low voltage signal into the high voltage signal to drive the lamp. The fan is disposed at a first side of the lamp for cooling the lamp.

Abstract: According to the invention, there is provided a projector having a light source unit 63, a light source side optical system which includes a color wheel and a light guiding unit, a display device, a projection side optical system and a cooling fan and comprising a projector control unit, wherein an interior of a projector casing is divided into an outlet side spatial compartment 122 which is positioned on an outlet side of the cooling fan and in which the light source unit 63 is disposed and an inlet side spatial compartment which is positioned on an inlet side of the cooling fan. In addition, this outlet side spatial compartment 122 is covered thereabove by an upper division board 125 above which a heat conductive sheet 128 which is formed of an aluminum sheet is disposed. Further, this heat conductive sheet 128 is electrically connected to the projector casing, so that electricity charged in the heat conductive sheet 128 can be discharged.

Abstract: A projector includes an image projection device, an exterior chassis accommodating the substantially L-shaped image projection device, and a ventilation device configured to block leakage light and to insulate sound of the projector and to discharge air inside the exterior chassis to the outside through an air outlet formed on an end face located in a direction of projection. The image projection device includes a light source device, an optical modulation device, and a projection optical device. The ventilation device includes an axial fan with a suction port and a discharge port. An air outlet duct bends air discharged from the discharge port at an angle of substantially ninety degrees by a vertical wall substantially perpendicular to the discharging direction of air from the discharge port of the axial fan towards a side receding from the projection optical device to lead to the air outlet of the exterior chassis.

Abstract: An illuminating apparatus includes a polarized light beam splitter, a first polarized light source device, and a second polarized light source device. The first polarized light source device has a first light source device, a first polarized light separation prism, and a first polarization element. The second polarized light source device has a second light source device, a second polarized light separation prism, and a second polarization element. The illuminating light flux having the first polarized light component emitted from the first polarized light source device and illuminating light flux having the second polarized light component emitted from the second polarized light source device are both linear polarized light components and have different polled light axis from each other.

Abstract: A projection display capable of preventing a reflector from damage and cooling a lamp at high efficiency. The projection display includes a light source which has a lamp and metallic reflector. The metallic reflector has an opening disposed above the light-emitting point of the lamp in the gravity direction. A duct has an end coupled to the opening and directs the air induced by a fan through the opening into the metallic reflector. The air then circulates within the metallic reflector to cool the light-emitting point of the lamp, and subsequently is released out of the metallic reflector through through-holes formed with a front glass and a flange of the metallic reflector.

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 heat dissipation device of a projector for transmitting the heat from a lamp out of the projector, the heat dissipation device comprises a fan, a diversion duct, and a division vane. The diversion duct is used for changing the direction of the air flow that generated by the fan to a second direction from a first direction; and the division vane is disposed within the diversion duct for splitting the air flow to discharge the air flow with uniform distributing heat off the diversion duct.

Abstract: A cooling apparatus able to rotate cooling fans with required lowest limit speeds, and able to suppress power consumption and generated noise includes a cooling unit for cooling an object to be cooled by a cooling amount in accordance with a level of a supplied drive signal; a temperature detector for detecting the temperature of the object; a drive circuit for amplifying the drive signal and supplying an output signal to the cooling unit; a memory for storing correction data for correcting circuit error in the drive circuit; and a control unit for generating the drive signal based on the detected temperature of the object, correcting error in the output signal of the drive circuit based on the correction data stored in the memory, and outputting the generated drive signal to the drive circuit. The cooling apparatus may be used in a projection type display device.

Abstract: A projection display apparatus generates image light by modulating, with an image signal, light emitted from a light source disposed in a lamp house, and projects the generated image light onto a screen. The projection display apparatus has an air inlet duct for introducing air, to cool the light source, into the lamp house and an air outlet duct for expelling the air discharged from the lamp house out of the projection display apparatus. The air outlet duct has an opening defined in a side wall thereof, and a lid pivotally mounted thereon for selectively opening and closing the opening. The lid is not opened under normal pressure in the air outlet duct when the light source operates normally, and is opened when an abnormal pressure buildup higher than the normal pressure is applied to the lid, thereby releasing the pressure buildup.

Abstract: A method for determining whether to activate an illumination source includes directing an air current across at least a portion of the illumination source and across at least a portion of a temperature sensor. The method also includes sensing the temperature of the air current with the temperature sensor and determining whether to activate the illumination source based on the temperature of the air current.

Abstract: There is provided a heat conductive portion for conducting heat generated by an LED light source to cooling liquid at a rear side of each LED light source. Each heat conductive portion is connected one another with a pipe, and the cooling liquid flowing in the pipe is sequentially circulated through each heat conductive portion. A heat generation amount of an LED light source for red light is the smallest, the heat generation amount of an LED light source for green light is the largest, and the heat generation amount of an LED light source for blue light is the middle of the two. The cooling liquid cooled by passing through a radiation fin is firstly supplied to the heat conductive portion for the LED light source for red light, secondly supplied to the heat conductive portion for the LED light source for blue light, and lastly supplied to the heat conductive portion for the LED light source for green light.

Abstract: An aerial display system comprising inexpensive optical elements and a highly brightened LCD display or similar video image display types provides floating images in an expensive enclosure. In the aerial display system, either an anti-reflective acrylic plastic layer or a circular polarizer is disposed proximate and parallel to a beam splitter so that the focal point of the floating image is proximate to the plastic layer or polarizer. This image position yields both a wider filed of view and wider perceived field of view. The aerial projection system includes a plastic spherical mirror of low cost, which includes a plastic part of at least the following descriptions: mirror surface supported by wall structures of sufficient sphericity, of a plastic material formulation, having excellent optical grade finish, a reflective metal coating, and a protective overcoat.

Abstract: A projector includes a fan unit having a fan, supporting members functioning as a supporting base of the fan, and at least one resilient member operatively connected to the fan. The supporting members include a first supporting portion and a second supporting portion distant from the first supporting portion in the axis direction of the resilient member.

Abstract: A projection apparatus comprises a light emitting device (LED) and a cooling arrangement is described herein.

Abstract: A projector includes a housing, an optical unit, and a heat transfer module. The housing is made of a material with high thermal conductivity having a window. The optical unit is accommodated in the housing and further includes a light source, a panel, and a projection lens. The light source provides a light. The panel modulates the light. The projection lens projects the modulated light to leave the window. The heat transfer module is accommodated in the housing and connected the optical unit and the housing to transfer heat from the optical unit to the housing. Particularly, the projector is a cooling-fan saved projector. In addition, the projector further comprises a computer card adapter and a computer card inserted into the computer card adapter.