Abstract: A projection display apparatus comprises a liquid crystal unit assembly which includes a liquid crystal panel, an incident side polarizing plate and an emitting side polarizing plate which are arranged on an incident side and on an emitting side of the liquid crystal panel, respectively, and a color combining prism. The apparatus further comprises a fan; a duct which is connected to the fan and which is provided with an opening for supplying cooling air, wherein the opening is arranged near the liquid crystal panel and the incident side polarizing plate; a holder for holding the emitting side polarizing plate and the color combining prism; and a heat exchanger which is connected to the holder, wherein the heat exchanger uses liquid coolant.

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 light source device (18) includes a light source (1) constructed by a light emitter (1a) surrounded by a reflector (2); and a supporting member (20) for holding the reflector (2), and passages of cooling air are formed above and below the reflector (2). First and second openings (21b) and (21a) as passages of cooling air are opened in upper and lower portions, respectively, of the reflector (2). Near the opening (21a) on the lower side, a wind direction switching member (23) is disposed on the supporting member (20). The wind direction switching member (23) makes cooling air from the opening (21a) flow upward to a side of the light emitter (1a) in a state where the supporting member (20) is placed on a desk, and makes the cooling air flow directly to an upper portion of the light emitter (1a) via the opening (21a) in a state where the supporting member (20) is hung from a ceiling.

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 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 projector includes a case, a lamp unit and a barrier mechanism. The case has a first ventilation opening for communicating an inner side with an outer side of the case. The lamp unit is disposed in the case. The lamp unit includes a housing and a lamp body disposed in the housing. The housing has a second ventilation opening for communicating an inner side with an outer side of the housing. The barrier mechanism is disposed on a path from the second ventilation opening to the first ventilation opening. The barrier mechanism includes a first barrier member and a second barrier member. The first barrier member has a first receiving plate facing the second ventilation opening. The second barrier member has a second receiving plate disposed apart from the first receiving plate in a first direction to the second ventilation opening and disposed offset from the first receiving plate in a second direction crossing the first direction.

Abstract: A light source module comprises a case, a light source, a first air-circulation device, a second air-circulation device and an airflow guide. The case has an airflow outlet, and other components are disposed therein. The airflow guider includes a first stream-guiding part and a second stream-guiding part connected thereto. The first stream-guiding part and the airflow outlet are at a same side of the light source, the second stream-guiding part is over the light source. The first airflow provided by the first air-circulation device passes past the light source, arrives at the first stream-guiding part, flows from the front of the light source towards the back of the light source guided by the second stream-guiding part, and mixes up with the second airflow provided by the second air-circulation device and finally exits from the airflow outlet. Therefore, concentrated heat is prevented at the airflow outlet.

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

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

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: Disclosed is a projection display device which projects an image onto a projection surface by a projection optical system by using light from a light source and which helps to realize efficient light source cooling. The projection display device includes: a cooling fan arranged between the projection optical system and the light source and adapted to supply cooling air from the projection optical system to the light source; and an exterior case having an exhaust port in the vicinity of the light source and covering the projection optical system, the cooling fan, and the light source, the projection optical system, the cooling fan, the light source, and the exhaust port being arranged substantially in a straight line.

Abstract: A liquid-cooled projector incorporating cooling a component that to be cooled by a cooling liquid, and moreover, can constantly maintain the temperature of the component to be cooled at a prescribed temperature or below. A liquid-cooling jacket for cooling either one or both of the optical modulation element and cold mirror, which are the components that are to be cooled, one or a plurality of radiators, one or a plurality of reserve tanks, and one or a plurality of circulation pumps are connected together by piping. The components that are to be cooled are maintained at or below the prescribed temperature by circulating the cooling liquid through the system, which can further be separated at any position by couplers. By collecting the air that is generated in the cooling system in the reserve tank, idle running of the circulation pump can be prevented, and the effect of expansion and shrinkage in the volume of the cooling liquid can be mitigated.

Abstract: In a projector assembly having a lamp for emitting light, and an ellipsoid reflector for capturing the light, the ellipsoid reflector having an opening through its vertex facilitating placement of the lamp, there is provided an improvement wherein the opening in the ellipsoid reflector is sized to allow a major portion of cooling air to pass therethrough into a region defined by the ellipsoid reflector. An air deflector is situated in the opening so as to facilitate distribution of cooling air along the lamp and outwardly towards the inside surface of said ellipsoid reflector from within said region.

Abstract: A light source for a display device. The light source comprises a light-producing element, a reflector disposed around at least a portion of the light-producing element, a housing disposed substantially around the reflector, an airflow channel defined adjacent an outer wall of the housing by a separator structure, and an opening in the separator structure to allow airflow between the interior portion of the housing and the airflow channel.

Abstract: A projector apparatus, including: a light source including a high-pressure discharge lamp having a plurality of ventilation holes; an optical unit having a liquid crystal panel for optically modulating to light emitted from the light source in response to an input video signal; a ventilation fan; and cooling means for cooling the light source by blowing cooling-air blown from the ventilation fan to at least the light source, wherein a cooling-air ventilation inlet facing one ventilation hole of the high-pressure discharge lamp is formed at an upper position of a lamp case, which holds and fixes the high-pressure discharge lamp having the plurality of ventilation holes and positions and fixes the optical unit, a cooling-air ventilation outlet facing another ventilation hole of the high-pressure discharge lamp is formed at a lower position of the lamp case, and a tray is provided under the cooling-air ventilation outlet.

Abstract: A light source apparatus according to one embodiment of the present invention is comprised of a light emitting tube having a first electrode in one end and a second electrode in the other end thereof, the tube having both ends closed, a concave-shaped reflector having a hole in its deepest portion, the hole being provided for holding the light emitting tube, a transparent glass plate covering an opening of the reflector, a lead wire whose ends connects to the second electrode and extends out through a hole formed on a side surface of the reflector, respectively, a cooling fan blowing cooling air toward the reflector, and an air guiding member that separates the cooling air from the fan into a first cooling air cooling an outer surface of the reflector and a second cooling air cooling the other end of the lead wire extending out from the reflector.

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: A rear projection display device. The display device includes a screen and a base to which the screen is mounted. The base includes a plurality of vents to allow air to flow in and out of the base, a heat source, and an air movement device to move air from near the screen, past the heat source, and out through the vents.

Abstract: An air filtration device for projector includes a holder, a filter, and a rack. The rack is movably disposed in the holder for supporting the filter. When the rack moves to a first position, the rack is received within the holder. When the rack moves from the first position to a second position, the filter is released from the rack for replacement.

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 heat dissipation method for a projector includes measuring a first temperature at an intake vent of a projector, measuring a second temperature at an outlet vent of the projector, controlling a heat sink of the projector based on the first temperature when the second temperature is smaller than a predetermined value, and controlling the heat sink of the projector based on the second temperature when the second temperature is larger than the predetermined value.

Abstract: A lamp assembly and an air guide plate thereof. The lamp assembly and the air guide plate are positioned in a projector. The lamp assembly comprises a base with a bottom portion and an opening, and a lamp with a bulb disposed at the bottom portion in a manner such that it extends toward the opening. The air guide plate comprises a body, a first guide portion, a second guide portion, and a third guide portion. The first guide portion substantially extends between the bulb and the bottom portion. The second guide portion substantially extends toward the bulb. The third guide portion substantially extends between the bulb and the opening.

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: An image projecting apparatus including a base, a ballast unit disposed on a top of the base, a display device disposed adjacent to the ballast unit, a cooling fan disposed on the base and introducing external air to the ballast unit, and a guide duct in communication with the ballast unit, guiding the external air blown by the cooling fan to the display device. Thus cooling down of heat generating units such as a lamp unit, a ballast unit, a colorwheel unit, etc., with a minimized number of fans is provided while reducing noise generated therefrom and increasing cooling efficiency.

Abstract: A projection apparatus includes an outer casing, a light source disposed within the casing for generating light beams, and an optical engine connected to the light source for receiving the light beams in order to project an image. A heat sink includes an air tunnel mounted within the casing, and having air inlet disposed above the light source, and an exhaust fan mounted within an opening unit in the casing such that the fan unit is disposed in alignment with an air outlet of the air tunnel to transmit the intensive heat generated from the light source.

Abstract: A laser projector including a cooling system having an internal wall dividing the housing into a first compartment containing the optical components and a second compartment containing the electrical components, wherein the internal wall has a first face receiving the optical components and a second face receiving the electrical components thermally isolated from the first face. The internal wall includes a cooling channel and a fan directs air through the channel to maintain the optical components below a maximum operating temperature. The internal wall in one disclosed embodiment includes two parallel wall members each having a plurality of parallel channels, a thermoelectric cooling element located on the wall adjacent the first compartment, a sensor is located in the first compartment and a control maintains a temperature below ambient in the first chamber.

Abstract: In an LCD projector or other projection type display apparatus which uses a lamp such as a xenon lamp for a light source, the lamp is cooled efficiently without increasing ambient noises or without causing the whole apparatus to become large-sized, and at the same time the lifetime and the reliability of a fan which cools the lamp is made improved. When fans 3 and 4 which are disposed on a front side of the lamp mounted with a heat sink 1 rotate, external air of ordinary temperature is taken inlet and guided into ducts 5 and 6 so as to be blown onto the front face of the lamp by means of the fans 3 and 4. Then, high temperature air which was warmed by being blown onto the lamp is exhausted from an outlet to the outside.

Abstract: A projector and a dust detection device for an air filter thereof. The projector comprises a lamp, a fan, an filter, and a dust detection device. The lamp comprises a housing with an inlet and an exit. The fan is disposed in front of the inlet of the housing, and generates airflow to dissipate heat produced by the lamp. The air filter is disposed in front of the exit of the housing, and filters the airflow passing around the lamp. The dust detection device is disposed behind the air filter, and detects the state of the filtered airflow.

Abstract: A cooling system for an area around a lamp that accounts for a good part of an amount of heat generated by the projection type display device is isolated from a cooling system for other parts including a liquid crystal panel. Means is further provided of allowing the directions of intake and exhaust to be inverted in an entire device by changing the direction of rotation of an exhaust fan provided for the cooling system for the area around the lamp between forward and backward.

Abstract: Embodiments of the invention restrain temperature rise in a light exiting-side polarizer included in a liquid crystal light valve without limiting the quantity of light incident on the liquid crystal light valve and a projector that has a liquid crystal light valve to modulate incident light in accordance with a provided image signal and that projects an image represented by modulated light exiting from the liquid crystal light valve. The projector has a black level adjusting unit to adjust black level of the image signal, a temperature-detecting unit to detect temperature of the light exiting-side polarizer, and a control unit to control operation of the black level-adjusting unit. The control unit is characterized by causing the black level-adjusting unit to adjust the black level of the image signal on the basis of the temperature detected by the temperature-detecting unit in order to restrain temperature rise in the light exiting-side polarizer.

Abstract: A projector with air cleaning functionality is equipped with a negative ion generator. The negative ion generator is positioned along a cooling airflow route of the projector and is adjacent to a lamp module. A photo-catalyst sheet, which is stimulated by ultraviolet light emitted from the lamp module, can produce the negative ions quickly. The air, which is circulated along the cooling airflow route, carries the negative ions out of the projector so as to clean air in the surroundings.

Abstract: According to one embodiment, a lamp unit comprises a light source lamp, a casing and a dividing member. Configured to hold the light source lamp, the casing comprises a first opening as an inlet port where cooling air is fed from the outside to the light source lamp. The dividing member is provided in the vicinity of the second opening of the casing and is configured to divide the flow of the cooling air into the second opening into at least two paths.

Abstract: An object of the invention is to achieve a high intensity, a compact structure, a cost reduction and a heat radiation of a liquid crystal panel, in a projection type video display apparatus employing a combination of LED light sources and a light pipe. The light pipe is formed in a hollow type so as to be utilized as a cooling wind path. Further, a permeable or reflective baffle plate is provided within the light pipe. Further, the light pipe is formed by coating a mirror on an inner surface of an optical case integrally formed by fixing optical parts. Further, a dichroic mirror is arranged in an LED light source outgoing surface.

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

Abstract: A self dust-off apparatus includes a fan and a controller. The fan, which can be driven to rotate clockwise or counterclockwise, is installed in a projector. The controller is employed to direct the rotational direction (clockwise or counterclockwise) of the fan. In the normal operation, the fan rotates to guide the air from an inlet to an outlet. In the dust-off operation, the fan rotates along reverse direction to guide air inversely in relation to the normal operation so that dust is taken out of the projector easily.

Abstract: A projector incorporating a prism and a plurality of light valves for modulating light that passes through the prism, wherein a dust-sealed airspace is provided between an imaging surface of each light valve and the prism for providing air channels to cool respective ones of the light valves.

Abstract: A liquid crystal projector comprises an illuminating optical system including a light source, a color separating optical system for separating illuminating light rays emitted by the illuminating optical system into light rays of three colors, a projection lens unit comprising a projection lens, a cross dichroic prism disposed near a light receiving end of the projection lens, and a plurality of liquid crystal panels arranged around the cross dichroic prism, and a light source power supply for supplying power to the light source. The projection lens unit, the color separating optical system, the illuminating optical system and the light source power supply are arranged in that order. The liquid crystal projector has an outside size in a horizontal plane of 263 mm by 318 mm or below. The liquid crystal panels have a display screen size of 0.9 in. A cooling fan for cooling the plurality of liquid crystal panels is disposed beside the projection lens.

Abstract: An optical engine includes a light source, an optical main body and a projection lens. The optical main body includes a reflective light valve, a case, a first heat-dissipating device and a heat-insulating device. The reflective light valve reflects the incident light beam to form an image light beam or a dumped light beam that is not projected into the projection lens. The case encloses the light paths of the incident light beam, the image light beam and the dumped light beam. An opening is on the case for the dumped light beam to be projected into. A first heat-dissipating device is fixed on the case and covers the opening for removing the heat generated by the dumped light beam. A heat-insulating device is disposed between the first heat-dissipating device and the case for preventing the heat conduction between the first heat-dissipating device and the case.

Abstract: An intake structure, installed in a projection apparatus having heating elements, includes an intake port on the casing, air duct and an exhaust fan near the heating elements. The inlet of the air duct is connected to the intake port, and the outlet is disposed at a side of the heating elements. The air stream from the intake port is directed though the air duct for concentrating the air stream to the heating elements inside of the projection apparatus. Thus, it can be provided the maximum cooling effect and enhanced cooling efficiency for heating elements.

Abstract: An image projection apparatus includes a lamp, an optical modulator which modulates light emitted from the lamp to correspond to image data, a ballast which operates the lamp, a power supply unit, and a duct in which the power supply unit, the ballast, and the lamp are accommodated. The duct includes a first absorption hole and a main exhaust hole that communicate with an outside, and forms an air-flow path on which the first absorption hole, the power supply unit, the ballast, the lamp, and the main exhaust hole are disposed.

Abstract: A projection apparatus is formed employing a solid state light source having either an associated or integrated sensor to monitor a thermal condition of a region of the solid state light source. The sensor is equipped to output a signal indicative of the thermal condition of the monitored region. In various embodiments, a controller is also provided to conditionally initiate one or more thermal management actions based at least in part on the thermal condition of the region as indicated by the signal.

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: A projection displaying apparatus projects on a projection plane an image displayed on a reflection displaying device using light emitted from a light source. The projection displaying apparatus includes a wind feeding portion for feeding a cooling wind to a light-incident side of a polarization plate disposed on an optical path from the light source to the reflection displaying device, and a wind guiding portion for guiding the cooling wind such that the cooling wind can be blown on the polarization plate slantingly relative to a light-incident face of the polarization plate.

Abstract: A compact, light projection type image display apparatus based on reflection image display devices which provide high brightness without contrast deterioration caused by light leakage associated with black image display. The apparatus uses, as polarizers/analyzers for reflection image display devices, reflection polarizing plates which function as polarizing plates by their grating function only in a specific direction. In each light path, the reflection polarizing plate is located just before/after the reflection image display device.

Abstract: A projection device is provided, wherein the projection device includes a casing, a plurality of electronic components mounted within the casing, a vent in the casing disposed substantially adjacent to an electronic component, and an injection molded, electrically nonconductive vent screen having one or more mesh portions substantially bordered by a peripheral frame, wherein the vent screen is detachably coupled within the casing and secured against the vent.

Abstract: A partition installed in a housing of a projection apparatus to form a double-layer structure of a first zone and a second zone is used for a component of a cooling structure for the projection apparatus. Moreover, a first air inlet is disposed at the lower part of the first zone and a second air inlet is disposed between the first and the second zones. An air outlet with a duct and a plurality of sound sources and heat elements are disposed in the second zone. Outside air is drawn in from the first air inlet through a fan, then turned to enter the second zone through the second air inlet to cool heat elements and finally exhausted out of the system from the air outlet through the duct. Besides, the installments of the partition and the duct allow the distance of the sound source broadcasting to be lengthened and the diffusion light to be blocked so that both the noise and the leaking of the diffusion light can be reduced effectively.

Abstract: A projector projecting an image onto a screen, comprises a lamp emitting light; an optical system having an optical synthesizer including a blue panel, a green panel and a red panel, and an optical component disposed along an optical path from the lamp to the optical synthesizer; a cooling fan generating cool air cooling the optical system; and a guiding duct guiding the cool air to be distributed into a first passage and a second passage. With this configuration, the present invention provides a projector in which a guiding duct is partitioned and therefore cool air is distributed according to whether the cool air is sent to a relatively high temperature place or a relatively low temperature place in an optical system, preventing energy from being wasted by efficiently cooling some components of the optical system without overcooling others, and reducing noise caused by a cooling fan and air flow.

Abstract: An optical apparatus includes a color synthesizing prism, a plurality of exit-side polarizer plates which are respectively arranged on the light entrance side faces of the color synthesizing prism through entrance-side heat conduction plates, a plurality of liquid-crystal display devices which are respectively arranged on the entrance sides of the plurality of exit-side polarizer plates, and a plurality of entrance-side polarizer plates which are respectively arranged on the entrance sides of the plurality of liquid-crystal display devices. The entrance-side heat conduction plate which is located in the optical path of colored light generating the largest quantity of heat can be arranged in heat insulation from the entrance-side heat conduction plates which are located in the optical paths of the other colored lights, and it can be joined to an armoring case through heat conduction members.

Abstract: A new heat sink apparatus and method that simplify the assembly of the heat sink and thermal stud. The new heat sink assembly uses a spring retainer that, in most cases, can use existing socket mounting screws. A spring clip (202) presses a thermal stud (204) against the back of an electrical device package (206). The present invention is especially useful for attaching a spatial light modulator to a printed circuit board (106) since it provides a simple, reliable heat sink without blocking the light path to and from the device. The preceding abstract is submitted with the understanding that it only will be used to assist in determining, from a cursory inspection, the nature and gist of the technical disclosure as described in 37 C.F.R. § 1.72(b). In no case should this abstract be used for interpreting the scope of any patent claims.