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: A backlight apparatus of an edge light type includes at least one elongated luminescent source, a holder in which the luminescent source is provided and a housing in which the holder is provided. A supporting component is attached to an end of the elongated luminescent source for securing the luminescent source in the holder. The supporting component has a projecting section that projects outward from the holder such that the projecting section is thermally connected to the housing.

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: The invention provides a technique to effectively cool an electro-optical device in the electro-optical device encased in a mounting case. The mounting case can include a plate member arranged so as to face one surface of a liquid crystal panel and a cover member arranged so as to cover the plate and the liquid crystal panel. Cooling-air guiding portions that include at least some of the side surfaces of the liquid crystal panel as at least some of the surfaces that constitute the passage can be provided in the cover member.

Abstract: A metal heat diffusion member is formed below a transparent electrode by way of an insulation film such that the metal heat diffusion member is superposed on the transparent electrode. The heat diffusion member includes a projecting portion at a portion thereof remoter than a distance between the heat diffusion member and a thin film transistor, and the heat diffusion member is superposed on the transparent electrode at the projecting portion.

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: 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: 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: An optical device and a projector having the optical device is provided, which have a liquid-crystal display having, on an exit side, a first exit polarizer plate and a second exit polarizer plate arranged thermally insulated from each other and separated in an optical axis direction, the first exit polarizer plate being bonded on a first heat conductor plate which is bonded on an incident surface of a color-combining optical unit while the second exit polarizer plate is bonded on a second heat conductor plate held by a polarization-plate holding frame. By heat release through respective independent routes, it is possible to suppress the deterioration due to the temperature rise on the exit polarizer plates and liquid-crystal display.

Abstract: A liquid crystal display device capable of presenting to a viewer a high-quality video from the beginning of viewing the video on a liquid crystal display panel by heating the panel from a specified time earlier than a time preset to start the viewing. A liquid crystal display device for displaying a video on a liquid crystal display panel having a liquid crystal layer and electrodes for applying a data voltage to the liquid crystal layer is further provided with an inputting means for inputting time information for reserving viewing a video program and a heating means for warming the liquid crystal display panel for a specified period before the time preset to start the viewing. The period of warming the liquid crystal display panel is determined based on a working ambient temperature.

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: With a trend toward a higher intensity projection type liquid crystal display device to further increase brightness of a projection screen, rated input power of a light source lamp increases, which makes essential a fan apparatus for cooling the light source lamp, etc. Such a fan apparatus would require a light-shielding member which causes the number of parts to increase. The present invention provides a fan apparatus provided with a rotor section that can be rotated/driven around a predetermined rotation axis and a propeller section including propeller blades and attached to the rotor section arranged in such a way as to substantially shield light parallel to the rotation axis.

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 liquid crystal panel device, being able to transfer heat generation within each of cells building up a panel, into an outside thereof, effectively, therefore being suitable for use in a liquid crystal projection, etc.

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 light modulator assembly includes a substrate, a micro-electro mechanical semiconductor device (MEMS device) formed on the substrate, and a temperature control device coupled to the substrate and configured to maintain the MEMS device at or above an elevated threshold temperature.

Abstract: The present invention is a liquid crystal projector device using a liquid crystal panel. The device mounts a liquid crystal panel (16) on a light incident plane of a polyhedral dichroic prism (23) in a bonded state so as to integrate the panel with the prism, and comprises a heat sink (29) and a heat pipe (31) which forcedly cools the integrated structure statically. The liquid crystal projector device comprising the structure describe above cools the liquid crystal panel efficiently without bringing any trouble caused by fan noise or raise of dust.

Abstract: The invention provides a holder frame, optical device and projector which can prevent the substrate from deviating in position, the substrate from being compressed at the outer periphery and color unevenness from occurring. More particularly, in the four sides of a luminous-flux incident surface of a holder frame, there can be formed a plurality of cutouts extending from a vicinity of an opening to an outer edge of the luminous-flux incident surface and nearly orthogonal to a lengthwise of each side. Also, in the four sides of an accommodating surface of the holder frame, there are formed a plurality of cutouts extending from a vicinity of an opening to an outer edge of the accommodating surface and nearly orthogonal to a lengthwise of each side. The cutouts in each side of the accommodating surface of the holder frame are formed in positions between the cutouts formed in each side of the luminous-flux incident surface of the holder frame as viewed from a side of luminance-flux incidence.

Abstract: An electro-optical device cased in a mounting case includes an electro-optical device having an image display region on which projection light from a light source is incident, and a mounting case including a plate disposed to face one surface of the electro-optical device and a cover to cover the electro-optical device, a portion of the cover abutting against the plate, the mounting case accommodating the electro-optical device by holding at least a portion of a peripheral region located at the circumference of the image display region of the electro-optical device with at least one of the plate and the cover. In addition, the cover includes a cooling air introducing portion, and the cooling air introducing portion having a cooling air guiding portion to allow the cooling air which is blown to the electro-optical device encased in the mounting case to flow toward the image display region.

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: A liquid crystal display (LCD) includes a liquid crystal panel including first and second substrates, and a liquid crystal layer filled with liquid crystals between the first and second substrates, a backlight module irradiating light on the liquid crystal panel, a driver controlling the liquid crystals to adjust an amount of light transmission, and a second common electrode formed on at least one of the first and second substrates, the second common electrode having a characteristic of a high heat emitting resistance.

Abstract: A method and mechanism for cooling a display device, having an extremely bright light focused on its surface and is mounted inside a closed chassis, by conducting heat from the device directly to the chassis walls, where the heat is then transferred to the lower temperature air of the ambient surroundings. The mechanism uses an adjustable mechanical linkage to close the gap and make a good thermal contact between the projection device package or heat sink stud and the chassis wall. This approach reduces the requirements for large heat sinks and noisy cooling fans found in many conventional projection systems.

Abstract: A liquid crystal projector includes a reference temperature sensor, a comparison temperature sensor, and a shut-off unit for shutting off the power to a light source lamp for backlight when the difference between a temperature sensed by the reference temperature sensor and a temperature sensed by the comparison temperature sensor is more than a predetermined value. Used as the reference temperature sensor is a temperature sensor for sensing the ambient temperature of the main body of the liquid crystal projector, and used as the comparison temperature sensor is a temperature sensor for sensing the ambient temperature of a liquid crystal panel. Alternately, used as the reference temperature sensor is a temperature sensor for sensing the ambient temperature of the main body of the liquid crystal projector, and used as the comparison temperature sensor is a temperature sensor for sensing the ambient temperature of the light source lamp for backlight.

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.

Abstract: A direct-type backlight unit for flat panel liquid crystal display is provided. The direct-type backlight unit includes a plurality of lamps installed within a housing. A reflection plate is installed under the plurality of lamps in the housing. A diffusion film with a plurality of apertures thereon is installed above the plurality of lamps for diffusing light generated by the plurality of lamps. An optic focusing film is located on the diffusion film. The flat panel liquid crystal display is located above the optic focusing film.

Abstract: An image projector comprises a discharge lamp, image projecting means for displaying an image on a screen by emitting light from the discharge lamp, electric power regulating means for regulating the electric power supplied to the discharge lamp, a cooling fan for reducing the temperature of the discharge lamp or the image projecting means, a cooling fan controlling means for controlling the rotation of the cooling fan, and a sensor for detecting a temperature of the discharge lamp or the image projecting means, wherein the rotation of the cooling fan is stopped when the image projector is in a standby mode. In the standby mode, the cooling fan controlling means controls the rotation speed of the cooling fan based on the detected temperature.

Abstract: The invention relates to an ITO heater for a liquid crystal display, typically a DSTN display which comprises an active liquid crystal cell for optical modulation, characterized by a dummy cell adapted for optical compensation comprising two substrates with liquid crystal therebetween, by a heater, the heater comprising a transparent conductive layer applied to one of the substrates, and by the dummy cell further comprising electrically conductive spacing means for simultaneously maintaining a desired cell gap and equalizing the electrical potential between the two substrates.

Abstract: Provided is an electro-optical device encased in a mounting case including an electro-optical device having a substrate in which projection light from a light source is incident on an image display region, and a mounting case including a plate disposed to face one surface of the electro-optical device and a cover to cover the electro-optical device, a portion of the cover abutting against the plate, and the mounting case accommodating the electro-optical device by holding at least a portion of the peripheral region positioned at the periphery of the image display region of the electro-optical device with at least one of the plate and the cover. Also, the plate has a coefficient of linear expansion within a predetermined range on the basis of the coefficient of linear expansion of the substrate.

Abstract: An electro-optical apparatus encased in the mounting case includes an electro-optical device in which the light emitted from a light source is incident on an image display region, and a mounting case including a plate disposed to face one surface of the electro-optical device and a cover to cover the electro-optical device, a portion of the cover abutting against the plate, wherein the mounting case accommodates the electro-optical device by holding at least a portion of a peripheral region located at the circumference of the image display region of the electro-optical device with at least one of the plate and the cover. In addition, the cover has a surface area increasing portion to increase the surface area thereof.

Abstract: There is a need for allowing an exhaust direction of a cooling air to be appropriately changed according to an installation environment of a projection type display device. There is another need to achieve a system for preventing an intake air and an exhaust air from being circulated therebetween by changing the direction of an intake port as well as an exhaust direction. 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: An aspect of the invention provides a duct capable of cooling optical modulation systems with high efficiency while realizing miniaturization and reduction of the mounted number of cooling fans. The duct can be used for a projector including plural optical modulation systems, a dichroic prism, and a projection lens, and the respective optical modulation systems include liquid crystal panels, entrance side polarization plates, viewing angle correction plates, and exit side polarization plates. The duct can have plural air guide paths through which cooling air passes, a discharge opening, entrance side discharge openings, and exit side discharge openings formed in these air guide paths. With the optical modulation systems as targets of independent cooling, the entrance side discharge openings and the exit side discharge openings with respect to the targets of independent cooling are formed in different air guide paths.

Abstract: A liquid crystal projector comprises an equipment body containing projection device and cooling device and including an air intake port and an air exhaust port, a case for housing the equipment body, and a sliding device for sliding the case so as to take a first state in which the equipment body is pulled out of the case and a second state in which the equipment body is housed in the case. The air intake port and the air exhaust port are closed at the first state and are opened outside at the second state.

Abstract: A liquid crystal display includes a backlight unit and a liquid crystal display panel. The backlight unit contains an optical film positioned above a light source, and the optical film at least includes a vacuum layer for isolating heat generated by the light source. The liquid crystal display panel positioned above the optical film includes a plurality of pixel units.

Abstract: A flat panel display or a backlight module for homogenizing temperature distribution. The backlight module utilizes a heat pipe to carry out the heat from the light source quickly and homogenizes the distribution of temperature of the light source.

Abstract: An electro-optical device encased in a mounting case includes an electro-optical device in which projection light from a light source is incident on an image display region; and a mounting case including a plate disposed to face one surface of the electro-optical device and a cover to cover the electro-optical device, the cover having a first abutting portion of abutting against the plate, the mounting case accommodating the electro-optical device by holding at least a portion of a peripheral region located in the circumference of the image display region of the electro-optical device with at least one of the plate and the cover. Further, at least one of a heat transfer path reaching the cover from the electro-optical device through the plate and another heat transfer path reaching the cover from the electro-optical device not through the plate is formed, and the heat transfer path includes a portion in which the electro-optical device area contacts with the cover, directly or indirectly.

Abstract: A method of manufacturing a liquid crystal display includes forming a liquid crystal cell having first and second substrates, at least one alignment layer disposed on one of the first and second substrates and liquid crystal material disposed between the first and second substrates. Then, the liquid crystal cell is heated and then quickly cooled so as to prevent non-uniform illuminance from occurring in the display.

Abstract: The invention relates to the field of liquid crystal optical display heads. The invention is a liquid crystal optical display head comprising a casing (1) in which there are one or more lamps (6), one or more covers (7) surrounding the lamp or lamps (6) and at least one heat sink (8), the heat sink (8) being made as one piece from a heat conducting material and directly connecting the cover or covers (7) to the outside of the casing (1). The invention may especially be applied to liquid crystal optical display heads mounted on an aircraft instrument panel.

Abstract: This invention provides a technique of reducing temperature rise due to heat generation of polarization control elements. A projector includes: an illumination optical system; an electro-optical device for modulating light from the illumination optical system in response to image information; a projection optical system for projecting modulated light obtained with the electro-optical device and a base frame, formed using material including metal material, for mounting a plurality of optical components arranged on an optical path from the illumination optical system to the projection optical system. At least one of the plurality of optical components is a polarization control component that includes: a polarization control element including organic material for the controlling polarization state of light exiting from the polarization control element; and a light-transmissive member having a thermal conductivity of at least about 0.8 W/(m·K), to which the polarization control element is stuck.

Abstract: A cooling device for a reflective liquid crystal image kernel has an air duct unit on the external case, which is separated into front and rear end ducts and has an axial fan blowing downward. A guide plane has both of its lateral sides aslant downward to guide part of the air flow blown from the axial fan to the split air duct of each light valve on the outer side of the air duct unit to cool the outer surface of three light valves fixed on the outer case of the kernel. The air blown downward from the axial fan passes through the front and the rear air ducts of the air duct unit directly, and passing through the ventilation holes of the external case into the optical components such that a single fan is used to enhance heat dispersion and reduce noise.

Abstract: A liquid crystal panel modulates a light beam irradiated by a light source in accordance with image information, which includes a liquid crystal panel body having a pair of transparent substrates between which electro-optic material is sealed, and a holding frame of approximately C-shaped cross section having a base portion provided with an opening corresponding to an image formation area of the liquid crystal panel and a pair of lateral portions vertically provided on opposing sides of the base portion, the holding frame accommodating the liquid crystal panel body thereinside.

Abstract: A liquid crystal panel (441) has an optical modulator body (500), an accommodating portion (511) for accommodating the optical modulator body (500), a holding frame (510) for pressing and holding the optical modulator body (500) against the accommodating portion (511), and a frame member (512C) made of heat-conductive material and interposed between the optical modulator body (500) and a fixing plate (512), the frame member (512C) being provided on an outer periphery of a first substrate (501A) of a pair of substrates (501A, 501B) disposed on the side of the fixing plate (512), the fixing plate (512) and the frame member (512C) being integrally formed.

Abstract: A main heater controller is adapted to control operation of the LCD heater. A temperature controlled override switch is adapted to disable the LCD heater, independent of the main heater controller, upon a temperature reaching a shut-off temperature above a normal operating temperature of the LCD. The temperature controlled switch has a current flow path made of a material whose conductivity is a function of temperature. A cavity in which the temperature controlled switch is located is also provided. The cavity is adapted to transfer heat in air emanating from the LCD heater to the temperature controlled switch.

Abstract: A main heater controller is adapted to control operation of the LCD heater. A temperature controlled override switch is adapted to disable the LCD heater, independent of the main heater controller, upon a temperature reaching a shut-off temperature above a normal operating temperature of the LCD. The temperature controlled switch has a current flow path made of a material whose conductivity is a function of temperature. A cavity in which the temperature controlled switch is located is also provided. The cavity is adapted to transfer heat in air emanating from the LCD heater to the temperature controlled switch. The housing which forms the cavity also includes a vent system for the cavity.

Abstract: An optical shifter includes at least one liquid crystal cell and a birefringent element. The liquid crystal cell has a first surface to receive light thereon and a second surface to pass the light therethrough and selectively changes polarization states of the light according to a voltage applied thereto. The birefringent element receives the light that has gone out of the liquid crystal cell through the second surface thereof, and selectively shifts the optical path of the light depending on the polarization state of the light. The optical shifter controls the temperature of the liquid crystal cell by way of at least one heat transfer member, through which heat can be transferred to/from the first surface and/or the second surface of the liquid crystal cell.

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: A light transistor system, including an image transistor, and a coolant passageway extending through the image transistor. The image transistor has a liquid crystal modulator, configured to amplify a low-power light signal using amplification energy from a higher-power light source, such as a laser or arc lamp. The coolant passageway is configured to receive a flow of coolant therethrough, to allow cooling of the image transistor to prevent damage to it from the higher-power light source.

Abstract: The present invention provides a cover structure and an image output apparatus including the cover structure. The cover structure may be disposed on the image output apparatus for discharging and guiding the heated airflow inner the image output apparatus. The cover structure includes a first device and a second device. The first device is disposed on a housing of the image output apparatus and corresponds to a blowhole of the housing to mask a portion of the light emitted from the blowhole. The other portion of the light leaks from the first device to form a leakage light. The second device corresponds to an outer side of the first device to mask the leakage light.