Abstract: A projection apparatus including an illumination system, a reflective light valve, an imaging system, a loop heat pipe and a heat sink is provided. The illumination system is capable of providing a light beam and the reflective light valve is disposed on the transmission path of the light beam to convert the light beam into an image. The loop heat pipe includes an evaporator, a wick structure, at least a connecting pipe and working fluid. The evaporator includes a fluid backflow end and a vapor exhaust end, and the outer surface of the evaporator is connected to the reflective light valve. A wick structure is disposed inside the evaporator and connected with the fluid backflow end. The connecting pipe is connected between the fluid backflow end and the vapor exhaust end. The working fluid is located in the connecting pipe and the wick structure.

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: A liquid crystal panel in which temperature rise of the liquid crystal panel is sufficiently restrained by cooling the panel by means of a cooling liquid, and exudation of the cooling liquid toward the liquid crystal material is prevented. Disclosed are cover members attached to the liquid crystal panel that form cavities on the light entrance and exit sides of the panel. The cover members are such that a sealed portion of the liquid crystal material is not in contact with the cavities. The cover members are light transmitting. The cavities are filled with the cooling liquid.

Abstract: An optical device body (440) includes: three optical modulator holders (446) respectively holding three liquid crystal panels (441) and having cooling chambers with cooling fluid sealed therein to respectively cool the three liquid crystal panels (441) with the cooling fluid in the respective cooling chambers; a plurality of fluid circulators (448) intercommunicated with the three optical modulator holders (446) to guide the cooling fluid to the outside of the respective cooling chambers and re-introduce the cooling fluid into the respective cooling chambers; and a flow volume changer (449) disposed in a flow path of the cooling fluid and capable of changing flow volumes of the cooling fluid flown into the respective optical modulator holders (446) in accordance with heat values of the three liquid crystal panels (441).

Abstract: An optical device includes: a light modulation element that modulates a luminous flux emitted from a light source; a casing that houses the light modulation element; a holding member that holds the light modulation element and exposes a part thereof to outside; a refrigerant housed in a housing space surrounded by the casing, the holding member and the light modulation element; and a convection start unit that is provided in the casing and causes convection of refrigerant.

Abstract: A cooling apparatus includes a heat receiving casing thermally joined to a heating object directly or indirectly, a first device having hoses which communicate inside of the heat receiving casing, a fluid medium inside the heat receiving casing and in the hoses. The cooling apparatus also includes a solution sending pump circulating the fluid medium provided inside the heat receiving casing, and a second device having a radiator for cooling the circulated fluid medium, and a radiating fan.

Abstract: The inventions relate generally to a mounting case for an electro-optical device that includes a main body having a plate member formed by a pressing process, a bottom portion, and side portions continuous with the bottom portion to surround a side edge of the electro-optical panel so that the electro-optical panel may be accommodated therein. A heat-radiating blade corresponding to the circumferential edge of the main body of the plate member is partially formed by a pressing process and extends from the main body to the outside of the main body. A cooling air introducing portion extends from the circumferential edge in a direction toward the bottom portion for directing cooling air across the main body and over the heat-radiating blade for cooling the electro-optical panel. Detailed information on various example embodiments of the inventions are provided in the Detailed Description below, and the inventions are defined by the appended claims.

Abstract: A projection apparatus comprises a Light Emitting Diode (LED) and a cooling arrangement is described herein.

Abstract: An optical device (44) includes an optical modulator holder (4402) having a cooling chamber, in which cooling fluid is sealed therein, for holding the optical modulator in the thermally conductive state for the cooling fluid in the cooling chamber, a plurality of fluid circulating members (448) communicated to the cooling chamber of the optical modulator holder for guiding said cooling fluid to the outside of said cooling chamber and again guiding the cooling fluid to the inside of the cooling chamber, and a cooling fluid accumulating section provided in flow path of the cooling fluid of the plurality of fluid circulating members for accumulating therein the cooling fluid; in which the cooling fluid accumulating section includes a main tank 445 and a fluid branching section 4401 provided in the upstream of the cooling fluid against the optical modulator holder and a downstream-side cooling fluid accumulating section provided in the downstream of the cooling fluid against the optical modulator holder.

Abstract: An optical modulator holder 4402 has a middle frame 4409 for supporting a liquid crystal panel 441, a pair of frame members 4405 and 4406 for sandwiching the middle frame 4409 supporting the liquid crystal panel 441, a second elastic member 4407B and a third elastic member 4407C respectively interposed between the pair of frame members 4405 and 4406 and the liquid crystal panel 441, and translucent boards 442A and 443A respectively arranged on outer faces of the pair of frame members 4405 and 4406. An opening 4409A into which the liquid crystal panel 441 can be fitted is formed on the middle frame 4409, and an inner face thereof serves as an exterior position reference face for the liquid crystal panel 441.

Abstract: An optical device capable of efficiently cooling a light modulation element and preventing deterioration in an image formed on the optical modulation element having a light modulation device. The light modulation device includes a light modulation element to modulate a luminous flux and to form an optical image; and a support frame to hold the light modulation element, the support frame having an aperture for an image-forming region of the light modulation element. The light modulation device, is formed with an aperture, and provided with a container-like coolant enclosure sealed with a coolant for cooling the light modulation element. The coolant enclosure has a first cooling chamber hermetically sealed with the coolant in a space including the aperture, and a second cooling chamber formed in a position avoiding the aperture and partitioned from the first cooling chamber to thereby allow another coolant from an exterior chamber to flow therein.

Abstract: A liquid crystal display device in which light from a light source enters a liquid crystal panel and exits therefrom for projection of an image and includes a heat conducting member and a cooling unit. The heat conducting member is contacted with at least one of a light incident surface and a light outgoing surface of the liquid crystal panel, is light-transmissive, and has a larger area than a light transmitting area of the liquid crystal panel. The cooling jacket, which comprises a flow channel for a cooling medium in its inside, is provided around the heat conducting member so that the flow channel exists only outside of the light transmitting area in a surface direction of the liquid crystal panel.

Abstract: An optical device (44) includes: a optical modulator holder (4402) that has inside thereof a cooling chamber in which a cooling fluid is encapsulated, and holds a optical modulator in such a manner that heat can be transferred between the optical modulator holder and the cooling fluid within the cooling chamber; a plurality of fluid circulation members (448) that are connected to the cooling chamber of the optical modulator holder (4402) for mutual communication to guide the cooling fluid outside the cooling chamber and guide the cooling fluid inside the cooling chamber, again; and a main tank (445) that is arranged in the flow path of the cooling fluid in the plurality of fluid circulation members (448) and accumulates the cooling fluid. The main tank (445) has a cooling fluid inlet section for allowing the main tank (445) to be replenished with the cooling fluid.

Abstract: A heat-conductive frame (448) is provided extending between a holder frame (446) and a fixing member (447) of an optical device (44). Additionally, a heat-conductive member (450) is provided, which abuts on a dust-proof glass on the light-irradiation side of a liquid crystal panel (440) and the fixing member (447). The holder frame (446) and the fixing member (447) are fixed by a heat-conductive agglutinate. Besides, a heat-conductive member (452) is attached extending between a light-irradiation surface of a transparent member (443A) of an irradiation-side polarization plate (443) and the fixing member (447). A heat-radiation fin (449) having a plurality of fin members (449B) is attached to an upper plate body (447C) of the fixing member (447).

Abstract: Exemplary embodiments provide an optical device, optical device manufacturing method, and projector that can easily position an optical modulation element in a predetermined position. The optical device includes an optical modulation element holder to hold an optical modulation element thereon so as to be able to transfer heat to cooling fluid within cooling chambers, a plurality of fluid circulation members connected in communication to the cooling chambers, and a cooling fluid relay section that, disposed at a predetermined position relative to the optical axis of a luminous flux emitted from a light source, relays cooling fluid transferred via the plurality of fluid circulation members. Out of the plurality of fluid circulation members, fluid circulation members whose one-side end are connected in communication to the cooling chambers of the optical modulation element holder are formed so that the another-side end thereof protrudes toward a luminous flux emergent side.

Abstract: An electronic apparatus including a first tube system (641) that guides the cooling medium from the cooling medium storage section (62) to the components to be cooled; a second tube system (642) that sends back the cooling medium having been used for cooling the components to be cooled to the cooling medium storage section (62); and a medium circulator (63) that is disposed on the first tube system (641) or second (642) in order to circulate the cooling medium through the cooling medium storage section (62), first tube system (641), and second tube system (642). Tube joints (6412) (6422) that is exposed to the outside of the casing (2), to which a cooling medium replacement cartridge (7) used for replacing the cooling medium in the cooling medium storage section with a new cooling medium is connected are provided in the first tube system (641) and/or second tube system.

Abstract: An optical modulator holder (4402) has an optical modulator holding unit (4405) having a substantially rectangular U-shaped cross-section and made of heat-conductive material, a plate-like member (4406) made of heat-conductive material, and an optical modulator cooling unit (4407) constituted by a hollow member which is capable of enclosing cooling fluid inside and is made of heat-conductive material. Of the optical modulator holding unit (4405) and the plate-like member (4406), peripheries of openings (4405A1, 4406A) each contact heat-transferably a liquid crystal panel (441). The liquid crystal panel (441) is held inside the rectangular U-shape of the optical modulator holding unit (4405). The optical modulator cooling unit (4407) is formed like a ring whose inner side surface heat-transferably contacts the liquid crystal panel (441), and has an inlet port (4407D) and outlet port (4407E).

Abstract: The invention provides a display panel, a transparent member placed on at least one of an incident surface and an emergent surface of the display panel, and a gap member placed between at least one of the display panel and the transparent member to form a gap therebetween. Accordingly, the effect of cooling the liquid crystal panel, the transparent member, and a display panel case is enhanced to extend the lifetime of the device and to reduce noise.

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: An optical device (44) includes three optical modulators, three optical modulator holders (447), a plurality of fluid circulating members (440), a cross dichroic prism (444), a fluid branching section (446), a fluid feed-in section (449) and a fluid pressurizing/feeding section (445). The three optical modulator holders (447) are fitted respectively to the three light-incident surfaces of the cross dichroic prism (444) through three supporting members (448). The fluid feed-in section (449) is fitted to the top surface of the cross dichroic prism (444). The fluid branching section (446) and the fluid pressurizing/feeding section (445) are laid one on the other and fitted to the lower surface of the cross dichroic prism (444).

Abstract: A light source lamp unit (10) includes a light source lamp (11), an ellipsoidal reflector (12) and a plate body (19). The plate body (19) is provided behind the reflector (12) with a gap kept therebetween, which has a shape corresponding to the profile of a reflecting portion (122) of the reflector (12). A cooling channel for passing a cooling air is formed between the plate body (19) and the reflector (12). The width of the cooling channel in a direction along an optical axis of the light source lamp (11) is minimized at a part near a neck portion (121) of the reflecting portion (122) and enlarged toward the peripheral edge of the reflecting portion (122) of the reflector (12).

Abstract: A cooling system for a display projector. The display projector has a plurality of panels substantially enclosing a heat generating component. The system includes means for conducting heat from the heat generating component to at least one panel of the housing and means for dissipating the conducted heat, wherein the means for dissipating comprises at least one panel of the display projector.

Abstract: In order to perform high efficient cooling without boiling cooling liquid and to improve maintainability such as replacement of a lamp, the present invention provides a liquid crystal projector including a light source lamp, a liquid crystal panel, a power source, a fan for removing heat generated by the power source and the lamp, a water-cooling jacket provided on an inner surface of an external wall portion opposed to the lamp in the liquid crystal projector, a metal pipe arrangement for radiation which is placed in the external wall portion, and a pump for driving cooling liquid to flow in the water-cooling jacket so that the cooling liquid receiving the heat from the lamp circulates in a circulation path through the water-cooling jacket, the metal pipe arrangement, and the pump to emit the heat to the outside through the metal pipe arrangement.

Abstract: An optical device has: a metal cooling device (500) disposed between a liquid crystal panel (441) and a light-incident side of a cross dichroic prism (443) and having a holding surface for holding polarization plates (521, 522) attached with a polarization films (521A and 522A) in a mutually spaced manner, the cooling device cooling the polarization films; a base (445) provided on the upper and lower sides of the cross dichroic prism (443) and having a cooling device attachment surface (449A) for the cooling device (500) to be attached; and a fixing member (600) provided on a light-incident side of the cross dichroic prism for locating and fixing the liquid crystal panel (441) on the light-incident side, the fixing member (600) being formed with a attachment surface (631) on which a pin (730) for mounting the liquid crystal panel (441) is formed.

Abstract: In order to perform high efficient cooling without boiling cooling liquid and to improve maintainability such as replacement of a lamp, the present invention provides a liquid crystal projector including a light source lamp, a liquid crystal panel, a power source, a fan for removing heat generated by the power source and the lamp, a water-cooling jacket provided on an inner surface of an external wall portion opposed to the lamp in the liquid crystal projector, a metal pipe arrangement for radiation which is placed in the external wall portion, and a pump for driving cooling liquid to flow in the water-cooling jacket so that the cooling liquid receiving the heat from the lamp circulates in a circulation path through the water-cooling jacket, the metal pipe arrangement, and the pump to emit the heat to the outside through the metal pipe arrangement.

Abstract: For obtaining both high brightness under condition of small-sized and simplified structure and suppression of increase in temperature of liquid crystal display elements and polarizing elements, in a liquid crystal display apparatus, comprising: a liquid crystal display element 2 for converting light from a light source into display picture depending on a driving signal; an optical projection system 1b containing a first optical element 1a and for projecting said light signal toward an object of projection; exit side polarizing elements 3b; a holding member 6 for holding them with the liquid crystal display element 2; and cooling medium 5; incident side polarizing elements 3a, wherein, a space is defined by either one of the incident side polarizing elements 3a and the liquid crystal display element 2, the first optical element 1a, between the liquid crystal display element 2 and the first optical element 1a, and the holding member 6, and said space is filled up with the cooling medium 5.

Abstract: The invention relates to a projection display device having an illumination system comprising a light source and an optical system for providing an illumination beam. The projection display device is further provided with an image display system for modulating the illumination beam with image information and projecting an image on a screen. In order to filter ultra-violet and infra-red radiation from the light source, a filter means is present which transmit visible light. Cooling means comprising a cooling liquid are present for cooling the filter means. In the projection display device, the filter means comprises the cooling liquid which contains a radiation-absorbent additive for absorbing the ultra-violet and infra-red radiation.

Abstract: A projection display apparatus having a light source for generating a white light, a liquid crystal panel for modulating an incident light from the light source, a polarizing plate which is located at a light exiting side of the liquid crystal panel for polarizing a light from the liquid crystal panel passed therethrough and a cooling liquid for cooling at least the liquid crystal panel and the polarizing plate. A projection lens device having plural lens elements which is located at a light exiting side of the polarizing plate is provided for projecting the light passed through the polarizing plate. One of the plural lens elements located nearest the polarizing plate has a negative refractive power in a center region containing an optical axis thereof and has a positive refractive power in a peripheral portion of the center region.

Abstract: An optical projection system having optical components immersed in a liquid. An enclosure holds the liquid, a spherical lens, a polarizer, a polarizing beam splitter, a reflective light valve having a retarder foil, and an exit window. The liquid stabilizes the thermal environment, reduces the need for antireflective coatings, enables a reduction in the number of optical components, and enables high optical flux.

Abstract: A droplet generating apparatus is provided to a projector, so as to cool an optical member utilizing taking away of heat when droplets are vaporized. The droplets generated by the droplet generating apparatus are allowed to adhere directly to the optical member or an air flow is generated to transfer the droplets, so that the droplets are allowed to adhere to the optical member. Moreover, the optical member is cooled by cooling air, and after the droplets are included in the cooling air, the droplets are removed, so that a temperature of the cooling air is previously lowered.

Abstract: A projection display apparatus including an optical modulator for modulating an incident light from a light source, and a projection lens device for projecting the light modulated by the optical modulator. The optical modulator includes a liquid crystal panel, a cooling liquid filled up at least within a space defined between the liquid crystal panel and a lens of the projection lens device which is located closest to a light source side, and a polarizing plate. The polarizing plate is positioned in the space so that opposite surfaces of the polarizing plate contact the cooling liquid.

Abstract: An assembly for dissipating heat from an active matrix liquid crystal display module while avoiding developing thermally induced mechanical stresses which can adversely affect the electro-optical properties of the liquid crystal material is disclosed. The module is affixed to a circuit board containing electrical leads for connection to drive electronics, in a way such that the substrate containing the active matrix elements is suspended through a window or through-hole in the circuit board and is sunken or nested into a soft elastomeric gel which is electrically non-conductive but thermally conductive. The gel provides the requisite thermal conductivity to dissipate the heat via a heat sink with which the gel is in thermal contact.

Abstract: A display unit includes an optical modulation element for subjecting an incident light beam to optical modulation, and a coolant disposed in contact with an output side of the optical modulation element, wherein a focal distance of an output light beam of the optical modulation element is set to a predetermined distance in accordance with a length of the output light beam of the optical modulation element, which passes through the coolant.

Abstract: A projection tube featuring good accuracy in controlling a slant angle between a cathode ray tube and a projection lens, an excellent focusing performance, and further low production cost, and also a video projection systems which utilizes the foregoing projection tube. There are a spacing member to control the slant angle and according to the slant angle, both being built between a cathode ray tube and a radiator.

Abstract: A high intensity light projector for stage, architectural and similar applications includes a controllable image quality projection gate providing advanced visual effects. The projection gate, capable of selectively scattering or transmitting incident light, may be constructed of an array of scattering liquid crystal material in combination with infrared and ultraviolet reduction means which provide in the high intensity beam, a stable thermal environment by minimizing the absorption of light by the projection gate. Additional thermal efficiency is provided by supplemental cooling means. Color control is also provided in the form of dichroic filter wheels forming cooperating adjustable low, high and band width filters including saturation control. A color measuring feedback sensor is also provided. An intensity measuring feedback sensor controls a spatially-modulated, variable-density, reflectively-coated dimming wheel. A programmable gobo system has provisions for gobo selection, orientation, and rotation.

Abstract: A cooling device has a container filled with a coolant. A front side and a rear side of the container are transparent. A heatsink is provided for cooling the container. A liquid crystal panel is attached to one of the sides. Convection enhancing means is provided for enchancing convection of the coolant in the container.

Abstract: A liquid crystal display unit comprising a condenser lens, incident-side polarizing plate, liquid crystal panel and emanating-side polarizing plate is disposed in an optical path from a light source toward a projection lens. A cooler comprising a closed flat platelike glass container and a refrigerant enclosed in the container with a vacuum space of specified volume left therein is joined to each of the incident-side polarizing plate and the liquid crystal panel over an effective image area. The incident-size polarizing plate and the liquid crystal panel are prevented from overheating by the spontaneous convection and evaporation of the refrigerant and the condensation thereof within the space.

Abstract: A liquid crystal display device for enlarging and projecting an image displayed on a transmission liquid crystal display panel through a projecting lens onto a screen by radiating a light from a light source to the panel, has a heat pipe inserted into a transparent cooling vessel filled with transparent cooling liquid for externally radiating heat absorbed by the liquid to suppress the temperature rise of the panel due to the light incident to the panel.

Abstract: Cryogenic-fixation apparatus comprises a light source, a beam from which enter cooling liquid in a bath, through a window in the underside of the bath. The beam can be directed upwardly by means of a reflecting prism. When a lid of the bath is closed, the beam leaves the space defined by the path through an exit port in the lid, and is incident upon a specimen mounted on a specimen holder located above the exit port, the specimen holder being secured to an injector rod.