Abstract: A projector, comprising a housing, a light source, a reflecting mirror, a supporter, a film, a first lens, a second lens, and a lens carrier. The reflecting mirror and the supporter are disposed at the back of the housing. The first lens is disposed in the front of the housing. The light source and the reflecting mirror are disposed on the supporter. The film is disposed between the light source and the first lens. The lens carrier is fit on the head of the housing. The second lens is disposed on the lens carrier. The projector features clear projected images at large projection distances and can accurately adjust positions of the projected images for merging into one large projected image.

Abstract: A portable projector includes a housing, a first light source and a second light source located in the housing. A board thermally contacts the first light source for absorbing heat from the first light source. A heat pipe connects the board and a first heat sink for transferring the heat generated by the first light source from the board to the first heat sink. A second heat sink thermally contacts the second light source for dissipating heat from the second light source.

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: In lamp unit 10 having light source lamp 1, reflector 2 for reflecting light from light source lamp 1, reflector holding member 11, and reflector cover 15, a plurality of cooling holes 18a are formed in a region of reflector holding member 11 provided with lamp unit positioner 16a. Cooling holes 18a are open toward an upper bulb area, a lower bulb area, and a cathode of the light source lamp, respectively. Stud 22a for fixing reflector holding member 11 has a throughhole extending at the center thereof, so that cooling air fed from high static pressure blower 27 can be sent to cooling holes 18 through tube 28 and the throughhole of stud 22a, thus efficiently cooling the upper bulb area, lower bulb area, and cathode of light source lamp 1 in a concentrative manner with a small amount of air. Thus, the resulting lamp unit, provided by the present invention, can reduce the amount of air required for cooling the lamp, and can use a high static pressure and small fan.

Abstract: Barometric-pressure data that a barometric pressure sensor outputs, and an air volume data that an air-volume sensor outputs are input into a system control circuit. The system control circuit is provided with a table storing portion. In the table storing portion, a control table is stored. The control table defines a voltage value to be added to a fan power supply set by a barometric-pressure value and an air-volume value. The voltage value to be added is voltage added to a normally set voltage value, and is set within a range from 0 (zero) V (volt) to 6 V, for example. The normally set voltage value is voltage set based on temperature detected by a temperature sensor, for example. In this case, the voltage value to be added is applied to voltage that is determined by the outside temperature and applied to the fan power supply.

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: A projector includes a light source, an electro-optical device, a projection lens, an outer casing for housing the above components, and a dust suction member. The electro-optical device is configured for forming an optical image using a light beam emitted from the light source. The projection lens is configured for projecting the optical image formed by the electro-optical device. The outer casing is configured for housing the light source, the electro-optical device and the projection lens therein, the outer casing having an inlet and an outlet and defining an airflow channel in communication with the inlet and the outlet. The dust suction member is arranged in the airflow channel, the dust suction member having an adhesive outer surface.

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 projector capable of efficiently cooling a source lamp with single air feed means is obtained. This projector comprises a source lamp, an optical component arranged on a position irradiated with light from the source lamp, air feed means for feeding air toward the source lamp, a first air guide member for guiding the air fed from the air feed means at least toward the optical component and a second air guide member for guiding the air guided toward the optical component to pass through the optical component toward the source lamp.

Abstract: A projector which projects an image, includes: an optical configuration section which includes: a light source which emits light; an optical conversion section which includes a conversion section which converts the light emitted from the light source into an image based on image data; and a projection lens which enlarges and projects the image converted by the optical conversion section; a circuit configuration section which operates the optical configuration section; a housing which is included in the exterior of the projector and includes, in its outer surface portion, a heat releasing section; and a heat transfer member which transfers, to the housing, heat emitted by heat emitting components of the circuit configuration section and the optical configuration section.

Abstract: A projector comprises: a cooling fan for sucking ambient air through a filter; switching means for switching the operational mode of the cooling fan between a lowland mode and a highland mode; and control means adapted to obtain current fan voltage to determine the normal rpm value for that current fan voltage in reference to a highland voltage-rpm characteristic when the switching means is in the highland mode, obtain current fan rpm, and enables alarming means to issue a filter clogging alarm in the event that the current fan rpm is larger than the normal rpm value plus a predetermined value. Thus, filter clogging can be detected with precision in highlands.

Abstract: The image projection apparatus includes a light source lamp including a discharge light emitting tube and a reflector, the discharge light emitting tube including a light emitting portion disposed inside of the reflector and an electrode portion disposed outside of the reflector, a cooling fan, and a duct configured to guide a cooling air flowed by operation of the cooling fan toward the light source lamp. The duct includes a first air guiding portion and a second air guiding portion that cause parts of the cooling air to respectively proceed toward a first area and a second area opposite to each other on an outer circumferential surface of the light emitting portion, and a third air guiding portion that causes another part of the cooling air to proceed toward the electrode portion.

Abstract: A projector includes a cooling device for performing cooling of a target object housed inside a housing, a first temperature sensor disposed in an anterior stage of the target object on a cooling path formed by the cooling device inside the housing, and for measuring a first detection temperature in an anterior area of the cooling among peripheral areas of the target object, a second temperature sensor disposed in a posterior stage of the target object on the cooling path, and for measuring a second detection temperature in a posterior area of the cooling among the peripheral areas, and a control device for performing calculation regarding the temperature of the target object from the first detection temperature and the second detection temperature, and controlling the cooling device based on the result of the calculation.

Abstract: According to one embodiment, a projection display apparatus comprises an optical system configured to modulate light from a light source in accordance with an input image signal and to project modulated light onto a screens a cooling fan configured to cool the optical system, an error detector configured to detect a driving error of the cooling fan, a target rotation speed setting unit configured to set a target rotation speed of the cooling fan, and a target rotation speed controller configured to increase the target rotation speed of the cooling fan when the error detector detects a drive error of the cooling fan.

Abstract: A cooling system for cooling down a heat source of a projection device is disclosed. The cooling system includes a fan, and a control module. The control module is configured for supplying a first voltage to the fan for a first duration after the projection device is powered off and a second voltage to the fan for a second duration successive to the first duration. The second voltage is greater than the first voltage.

Abstract: A projector includes a light source unit that emits light, a lamp driving unit that supplies a driving power to the light source unit, a power supply unit that supplies a power to at least the lamp driving unit, a fan that circulates cooling air to the lamp driving unit and the power supply unit, a distribution unit that distributes air volumes of the cooling air by the fan to the lamp driving unit and the power supply unit, and changes the air volumes of the cooling air distributed to the lamp driving unit and the power supply unit, and a distribution control unit that performs driving control on the distribution unit so as to change the air volumes of the cooling air distributed to the lamp driving unit and the power supply unit in accordance with the driving power supplied to the light source unit.

Abstract: A display device according to the invention has a passage between an image generation device (DMD) and a lamp, wherein the passage guides airflow to the vicinity of a reflector of the lamp, and, after the airflow cools the DMD, the airflow can further cool heat generated by a filter which converts light from the lamp to an image light corresponding to video signals of R, G, and B, and by a light pipe which uniformalizes the in-plane intensity distribution of light incident to the DMD.

Abstract: A projector includes a housing, an internal projection mechanism, and an external air filtration device. The housing has a ventilation window portion. The internal projection mechanism is disposed in the housing, and includes an imaging system, a light source system for providing a light beam to the imaging system, and a ventilating fan. The external air filtration device includes a frame, a filter member, and an engaging unit. The engaging unit engages removably the frame to the ventilation window portion of the housing for securing the filter member on the exterior of the housing between the frame and the ventilation window portion.

Abstract: The disclosure refers to an electronic device and methods for cooling an object within the electronic device. In one example, an electronic device includes a cooling fan for cooling an object. An air-quantity measuring device measures a quantity of cooling air sent by the cooling fan. An ambient-temperature measuring device measures an ambient temperature around the electronic device. A control unit is configured to control the electronic device. The control unit includes an object-temperature calculating section configured to calculate a temperature of the object from the measured air quantity and the measured ambient temperature. An operation control section is configured to control the cooling fan according to the calculated temperature of the object.

Abstract: Provided is a projection-type display apparatus which can efficiently cool a reflection mirror with a small number of cooling fans. The projection-type display apparatus is a display apparatus for modulating a projection light from a lamp by an optical modulation device and then projecting the light on a screen in a magnified form by a projection optical system, which has a configuration in which the projection optical system includes at least one reflection mirror, and a reflective surface of the reflection mirror is air-cooled by a cooling fan, wherein an air flow rate of the cooling fan is controlled based on a projection image information.

Abstract: A device (300) to produce a color image using four or more primary colors. The device may include four or more transmissive spatial light modulators (309, 310, 311, 312) to modulate four or more, respective, light beams in accordance with four or more, respective, primary color image components of the color image to produce four or more, respective, modulated light beams. The device may also include a beam combining arrangement (320) to combine the four or more modulated light beams into a combined light beam carrying the color image.

Abstract: An ion wind generator is arranged in the vicinity of a light source. The ion wind generator allows an air flow by negatively ionizing air by corona discharges using negative side needle electrodes, and drawing the negatively-ionized air using a ground side mesh electrode. High-temperature air surrounding the light source is drawn by the air flow and exhausted from an exhaust port at a rear side of a casing. An ozone decomposition catalyst filter is provided in the exhaust port. Ozone (O3) is generated by the corona discharges in the ion wind generator. However, the ozone is decomposed by passing through the ozone decomposition catalyst filter provided at the exhaust port.

Abstract: A light source apparatus is disclosed which allows effective cooling of an arc tube even with a small amount of wind. The light source apparatus has a light emitter and a reflector which reflects light from the light emitter and causes the reflected light to emerge. The light source apparatus also has a wind-guiding member which has a flow inlet and a flow outlet of cooling wind and has a wall portion at a position opposite to the flow inlet, the wall portion guiding the cooling wind toward the light emitter in the reflector. The light source apparatus which has a reflector to which an arc tube is fixed via a connecting member, and has a first flow path on which cooling wind from a fan flows to cool an area of the arc tube closer to the connecting member, and a second flow path on which cooling wind from the fan flows to cool an area of the arc tube closer to a light emitting portion. The second flow path is formed separately from the first flow path.

Abstract: Disclosed is a cooling fan including a fan rotated by a motor, for forcibly circulating the air, and a fan housing having a through hole with a predetermined inside diameter so that the fan can be mounted thereon. A curvature radius of the end of the inner circumference of the through hole sucking the air is smaller than a curvature radius of the end of the inner circumference of the through hole discharging the air. As a result, the cooling fan can minimize noises in the operation.

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: Embodiments of methods and apparatus for cooling optics are disclosed.

Abstract: A temperature control system and method for projection device lenses. The temperature control system includes a controllable heater for selectively heating one or more lenses pad a controller for adjusting heat from the heat source responsive to an operating condition.

Abstract: An image display, includes: an image display section for forming and displaying an image in accordance with image information to be input; and a casing for housing the image display section, in which the casing includes: a lateral portion visible from an outside, the image display section being exposed from the lateral portion; and a bottom portion extending from a lower end of the lateral portion toward a rear side of the device, an opening for introducing air outside the casing is formed in the bottom portion, and an air filter for cleaning the air passing the opening is provided at the opening such that the air filter can be inserted to/removed from the lateral portion.

Abstract: A shutter device can switch between a state where illuminating light from a lamp of an illuminating device is blocked (referred to as a closing state of the shutter device) and a state where illuminating light passes through (referred to as an opening state of the shutter device). A system control circuit instructs a panel cooling fan-use power source to decrease a fan rotation speed, when receiving information indicating that the shutter device is in the closing state from the detecting portion. After receiving this instruction, the panel fan power source decreases power supplied to the panel cooling fan (fan motor).

Abstract: A projection optical system unit has a lower pedestal. The lower pedestal has first and second tubular portions opened to each other. An image formation device holding plate for a DMD is mounted on the first tubular portion at a side where one opening is formed. A mirror holder for a convex mirror is fixed on the second tubular portion at a side where the other opening is formed. A linear heat expansion coefficient in a specific direction of the lower pedestal component is set between 0.8×10?5 (1/K) and 3.0×10?5 (1/K).

Abstract: A video projector generates a black screen. Further, the video projector reduces the brightness of the light source which reduces the power level of the video projection system. Since the light source's power is reduced, less heat is generated by the video projector and the video projector's cooling fan may be slowed down. As a result, the video projector produces less noise.

Abstract: A projection video display includes a light source including an OPS-laser delivering laser radiation in multiple transverse modes (a multiple-transverse-mode OPS-laser). The display includes a spatial light modulator for spatially modulating the radiation from the multiple-transverse-mode OPS-laser in accordance with a portion of an image to be displayed. Projection optics project the spatially modulated light on a screen on which the image is to be displayed. In one example the OPS-laser is a diode-laser array pumped OPS-laser and is one of three lasers, one delivering red light, one delivering blue light, and the other delivering green light. The lasers are time modulated such that the spatial light modulator receives light from each of the lasers separately. The OPS laser is directly time modulated by periodically turning the diode-laser array on and off.

Abstract: An electronic device. The electronic device includes a housing, a light source and at least one heat-dissipating member. The light source is disposed in the housing, emitting light. The heat-dissipating member is disposed in the housing for lowing operating temperature of the electronic device and preventing light from escaping the housing.

Abstract: A display apparatus includes a light source, and a partition wall which divides an inside of the display apparatus into an enclosing space which includes a plurality of optical elements and an outer space with respect to the enclosing space. The optical elements includes a color separator which receives a light from the light source and emits a plurality of separate color beams, at least one reflecting type light valve which forms an image by reflecting the plurality of color beams, and a projection lens which projects the image of an external screen. A first cooling fan is provided which causes an air flow in the outer space. A least one of the optical elements forms a part of the partition wall, and the air flow cools the at least one reflecting type light valve from the outer space.

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: This invention provide a projector apparatus enabled to lower its exhaust air temperature by adding only minor modifications to the existing structure, without altering its basic structure. The liquid crystal projector apparatus of the invention has a casing (1) for accommodating therein a light source (4), an optical system adapted to construct imaging light in response to a beam of light received from the light source, a power supply (9), and a cooling unit (6) mounted on the side wall of the casing (1) to cool the components in the casing. Provided on the inner wall of the casing is an air inspiration mechanism (16, 17, 18, 126) in association with the exhaust unit (6), whereby the exhaust unit (6) can inspire ambient air through the air inspiration mechanism to lower the temperature of the air to be expired from the exhaust unit.

Abstract: A system control circuit is provided with a table storing portion. In the table storing portion, a table for a positioned-on-a-floor mode and a hung-from-a-ceiling mode, a table for upwardly-positioned, and a table for downwardly-positioned are stored. On each table, temperature of outside air and voltage supplied to each fan power supply are corresponded. In receipt of information indicating a positioned-on-a-floor state (angle=zero degrees) from an attitude detection sensor, the system control circuit selects the table for a positioned-on-a-floor mode and a hung-from-a-ceiling mode. In addition, the system control circuit obtains measured temperature data from a temperature sensor, and applies this measured temperature data to the selection table as a read-out address. As a result, voltage values regarding each fan power supply are read out from the selection table. The system control circuit instructs each fan power supply to drive the fans based on the read-out voltage values.

Abstract: A temperature control method adapted for a projector is provided. The projector includes a power supply unit, a battery, a cooling fan, a temperature detection unit, and a power management unit. The method includes: (a) switching power supply from the power supply unit to the battery, thereby maintaining a normal operation of the cooling fan and the temperature detection unit, when detecting a power outage of the power supply unit; (b) detecting a temperature of the projector; and (c) stopping supplying power to the projector, when the detected temperature of the projector reaches a predetermined value. Related projectors using the method are also provided.

Abstract: A method for shutting off a projector having a fan and a light source is provided. The method includes the following steps. The power of the light source is reduced from a first power to a second power and the speed of the fan is increased from a first speed to a second speed after the projector receiving a first command. Then, a process is executed for shutting off the light source and the fan after the projector receiving a second command. The above-mentioned method is capable of not only preventing the projector from damage result from over-shooting, but also shortening the time needed to shut off the projector.

Abstract: An ion wind generator is provided at the back of a light source. The ion wind generator negatively ionizes air by corona discharges using negative-side needle electrodes and draws the negatively-ionized air to a ground-side mesh electrode to allow an airflow to be occurred. A photocatalyst filter is provided at the back of the ion wind generator. Even if ozone (O3) is generated and a lower fatty acid is composed by the ozone and alcohol remained in a casing, the lower fatty acid is decomposed into alcohol and oxygen by the photocatalyst filter.

Abstract: A projector comprises a case, an illuminant heat source, a thermal module, and an equalizing temperature module. The equalizing temperature module is disposed between the illuminant heat source and the thermal module. When the fluid flows from the illuminant heat source to the equalizing temperature module, the fluid flows through a relative high temperature region more than that of flowing through a relative low temperature region. The equalizing temperature module at least comprises a heat pipe and a plurality of heat sinks. The heat pipe has a first end located in the relative low temperature region and a second end located in the relative high temperature region. The heat pipe transfers heat from the relative high temperature region to the relative low temperature region by a cold fluid in the heat pipe. The plurality of heat sinks are disposed on the heat pipe to increase the area of heat conduction.

Abstract: An optical projector comprising a main body and a sensing module is provided. The main body comprises a controlling unit, a heat-dissipating unit, a projection lens for projecting an image and at least a vent. The sensing module is disposed in the main body. The sensing module and the heat-dissipating unit respectively are electrically connected to the controlling unit. The hot air inside the main body exchanges with the cool air outside the main body through the vent. When the sensing module detects an external object approaching the vent, such as entering a predetermined range around the vent, the sensing module sends a signal to the controlling unit for activating an anti-overheating mechanism; for example, actuating the heat-dispersing unit or/and displaying a warning image on a screen.

Abstract: A projector apparatus includes: an optical system unit including an optical prism unit having liquid crystal panels for modulating red light, green light, and blue light and a dichroic prism, and a PS conversion device for aligning the polarization directions of the light from a light source lamp; cooling means for cooling the optical system unit; and an outer cabinet for mounting the optical system unit and the cooling means.

Abstract: A projection type display device of the invention includes a lamp unit (4) having a lamp holder (44) for holding a lamp, a power source cooling fan (6) for cooling a power source unit (3), and a duct (8) through which air caused to circulate by driving of the power source cooling fan (6) is guided, and which has at least a part of a wall portion defined by the lamp holder (44), so that heat exchange is performed between the air sent out by the power source cooling fan (6) and the lamp holder (44).

Abstract: An image projecting apparatus includes a main body casing comprising an inlet provided to a lower part thereof, and an outlet spaced from the inlet. A heat generating part generates heat in an inner part of the main body casing. A cooling duct coupled to the main body casing communicates with the inlet and the outlet, and has a channel guiding cooling air drawn in through the inlet to the heat generating part and accommodates the heat generating part therein. Thus, an image projecting apparatus is provided having a simplified cooling configuration for cooling a heat generating part, thereby improving cooling efficiency, and substantially reducing noise and costs.

Abstract: A method for controlling a cooling device within a projecting system is provided. The cooling device cools the projecting system with a predetermined period after the illumination device of the projecting system is turned off. Then, after the projecting system is restarted, it is detected that whether the illumination device is lighted or not. As the illuminating device is not lighted, the predetermined period is extended.

Abstract: A temperature control method for a display device comprising a lamp box for emitting a light, a fan for cooling down the display device and a digital image device for receiving the light from the lamp box and forming an image, comprises acquiring an operating time of the lamp box; calculating a temperature offset in accordance with the operating time of the lamp box; acquiring a temperature value of the digital image device; calculating a control value in accordance to the temperature value and the temperature offset; controlling the fan in accordance with the control value.

Abstract: A video projector (1) comprises a light source (11) enclosed in a lamp box (12), an optical engine (100) including a color wheel (13), an optical tunnel (15), a mirror (16) and a DMD (Digital Micro-mirror Device) (17), and a blower fan (30a) disposed in the vicinity of the light source (11) and below the optical engine (100). The blower fan (30b) sucks air through a portion of the optical engine (100) where the optical tunnel (159 and so an are provided except the color wheel (13), generates a cooling air and exhausts a part of the cooling air toward the color wheel (13) and the rest of the cooling air toward the light source (11), so that the elements of the optical engine (100) and the light source (11) are cooled by the blower fan (30b) simultaneously.

Abstract: An image projector having a LED light source comprises: an optical engine using the LED as the light source, a PCB module, a heat sink module and a main frame. The printed circuit board (PCB) module further comprises: a first circuit board, a second circuit board, at least one I/O interface for connecting an external device, at least one card reader for connecting an external memory card, and a control unit for processing the image data received from the I/O interface or card reader and projecting the image by using the optical engine. The first circuit board and second circuit board are furnished in an overlap and parallel manner to decrease the space consumption. The heat sink module comprises a fan, an air inlet and an air outlet, which substantially forms a heat dissipating passage from the air inlet through the fan toward the air outlet. The LED and control unit are located in the heat dissipating passage for increasing better heat dissipation effect.

Abstract: A projector having an image display element for modulating light on the basis of an image signal and a projection lens for projecting light emitted from the image display element on a screen, includes: a lamp which has a light emitting source for emitting light; a reflector which reflects light emitted from the light emitting source; a cover glass which covers an emission surface of light from the reflector; a cooling fan disposed outside the reflector; and an air direction changing unit which changes a direction of cooling air caused by the cooling fan. The air direction changing unit is disposed within a space surrounded by the reflector and the cover glass, and outside an emitted light path of light reflected by the reflector. Cooling air within the space is exhausted outside the projector through the cooling fan.