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: A display apparatus, comprises a filter unit 33 attached on an air inlet opening 28a, having such a filter 36 that a suction negative load generating at the air inlet opening 28a formed in an upper cabinet 3 comes to be smaller than the suction load generating at gaps 29a and 30a defined in the upper cabinet 3, when driving a cooling unit 18, for sucking an air from the upper cabinet 3 and discharging the air used for cooling into the upper cabinet 3, when cooling down optical parts, such as, display devices 15R, etc., and a polarizing plate 16R, etc., of an optic unit 9.

Abstract: The projection type image display apparatus according to the present invention has an engagement portion enabling engagement and disengagement between a first base and a second base. The first base supports a portion for forming an optical image and a projection lens in an optical system unit. The second base supports a power circuit or a controlling circuit for controlling the portion for forming an optical image in a circuit system unit. The optical system unit and the circuit system unit can be accommodated in the coupled state in a housing of the apparatus.

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: 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 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: 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 projection type display apparatus including a discharge lamp for supplying light, a light valve device and first and second air intake openings arranged on different sides of the apparatus. A centrifugal fan is associated with the first air intake opening so as to draw in outside air and form a first ventilation air flow from the first air intake opening through a lower side of the light valve device so as to cool the light valve device. A fan is associated with the second air intake opening so as to draw in outside air and form a second ventilation air flow so as to cool optical elements including lenses. An exhaust opening is arranged on a further side of the apparatus, and an exhaust is fan arranged proximate to a discharge lamp so as to draw out air including the first and second ventilation air flow therethrough.

Abstract: A projection type display apparatus including a discharge lamp for supplying light, a light valve device and first and second air intake openings arranged on different sides of the apparatus. A centrifugal fan is associated with the first air intake opening so as to draw in outside air and form a first ventilation air flow from the first air intake opening through a lower side of the light valve device so as to cool the light valve device. A cooling fan is associated with the second air intake opening so as to draw in outside air and form a second ventilation air flow so as to cool optical elements including lenses. An exhaust opening is arranged on a further side of the apparatus, and an exhaust is fan arranged proximate to a discharge lamp so as to draw out air including the first and second ventilation air flow therethrough.

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 equipment having a discharge lamp for supplying light and a light valve device for projecting the light from the equipment having an air intake opening arranged on one side of the equipment. A ventilation device is associated with the air intake opening so as to draw in air from outside of the equipment through the air intake opening and a ventilation path arranged so as to extend from an outlet of the ventilation device continuously. The ventilation path includes a partition member proximate to an outlet of the ventilation device and air flow through the ventilation path is divided into a plurality of air flows by the partition member so as to cool different parts of the light valve device respectively.

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: A projective display apparatus having an illumination unit which includes a light source, an integrator lens and a collimator lens, a light splitter unit which splits light beams from the illumination unit into a plurality of color components, a plurality of light valves, a cooling fan, and a wind guiding unit. A respective one of the light valves corresponds to a respective one of the color components. The wind guiding unit guides the cooling wind from the cooling fan to the illumination unit and the light valves. The wind guiding unit splits and forms at least two branch wind guiding paths. One of the branch wind guiding paths guides cooling wind from the cooling fan to the illumination unit and another of the branch wind guiding paths guides the cooling wind to 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 information management apparatus capable of reliable management of distributed information and an information providing system employing the same information management apparatus has a main information reproducing system for reproducing main information recorded in a given recording medium; and a reproduction management system for managing the main information reproducing system for reproducing the main information. A receiver is provided with a unit for recording distributed information and control information limiting the number of main information reproducing cycles on a recording medium, and a main information reproducing system provided with a reproduction disabling function for limiting the reproduction of main information.

Abstract: The present invention relates to an information providing system. More particularly, this invention relates to an information management apparatus capable of reliable management of distributed information and an information providing system employing the same information management apparatus. The information management apparatus comprises a main information reproducing means for reproducing main information recorded in a given recording medium; and a reproduction management means for managing the main information reproducing means for reproducing the main information. The present invention provides a receiving means provided with a means for recording distributed information and control information limiting the number of main information reproducing cycles on a recording medium, and a main information reproducing means provided with a reproduction disabling means for limiting the reproduction of main information.

Abstract: A projective display apparatus having an illumination unit which includes a light source, an integrator lens and a collimator lens, a light splitter unit which splits light beams from the illumination unit into a plurality of color components, a plurality of light valves, a cooling fan, and a wind guiding unit. A respective one of the light valves corresponds to a respective one of the color components. The wind guiding unit guides the cooling wind from the cooling fan to the illumination unit and the light valves. The wind guiding unit splits and forms at least two branch wind guiding paths. One of the branch wind guiding paths guides cooling wind from the cooling fan to the illumination unit and another of the branch wind guiding paths guides the cooling wind to 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: A display optical unit includes a light valve which modulates light to form picture information, a light splitter which splits light into a plurality of color components and for directing each of the color components to the light valve, an illumination unit which directs light emanated from a light source to the light splitter, and a projection lens which magnifies and projects the modulated light having the picture information for displaying a picture. An optical axis of the projection lens is shifted from an optical axis of the illumination unit and the light splitter, and a projection lens unit including the light valve and the projection lens has a positioning mechanism which determines a position thereof when attached and is attachable and detachable in a direction perpendicular to an optical axis of the projection lens unit.

Abstract: An optical equipment having a discharge lamp for supplying light, and first, second and third light valves for projecting the light from the equipment, having an air intake opening arranged on one side of the equipment, a ventilation device associated with the air intake opening so as to draw in air from outside of the equipment through the air intake opening and a ventilation path arranged between an outlet of the ventilation device and the first, second and third light valves. The ventilation path includes a plurality of partition members which divide the ventilation path into first, second and third air flow paths so as to cool the first, second and third light valves respectively by air from the ventilation device.