Abstract: An illumination apparatus includes a fluorescence unit, laser light irradiation means, and a beam integration unit. The fluorescence unit has a plurality of phosphors, in which the colors of fluorescence generated due to excitation differ, arranged in different regions. The laser light irradiation means irradiates laser light onto the regions of each color of the fluorescence unit while changing the position at which the laser light strikes the fluorescence unit. The beam integration unit integrates fluorescence from each region of the fluorescence unit on a display panel.

Abstract: A cooling apparatus for a liquid crystal image display having a liquid crystal unit includes an incident-side polarizing plate, a liquid crystal panel and an exit-side polarizing plate. The incident-side polarizing plate, the liquid crystal panel and the exit-side polarizing plate are disposed side by side with a gap therebetween to have the same in-plane direction. A first cooling unit feeds an air stream in an orientation of the in-plane direction, and a second air cooling unit feeds an air stream in the in-plane direction in a different orientation from the air stream by the first air cooling unit. The first air cooling unit and the second air cooling unit are set such that the first and second air stream collide with each other between the incident-side polarizing plate and the liquid crystal panel and/or between the liquid crystal panel and the exit-side polarizing plate.

Abstract: A silent cooling apparatus for effectively reducing the operating temperature of an electronic device includes a plurality of components which include surfaces opposite to each other with a spacing therebetween and have a heat generating spot on at least any of the surfaces opposite to each other, in a small and low-cost configuration. The apparatus for cooling a heat generating spot of an electronic device includes a cooling apparatus for forcedly air-cooling a heat generating spot of an electronic device which includes a plurality of components which are disposed side by side to have the same in-plane direction, and include heat generating spots within their surfaces. The cooling apparatus includes a first air cooling unit for feeding an air stream to the heat generating spot in an orientation of the in-plane direction, and a second air cooling unit for feeding an air stream to the heat generating spot in the in-plane direction in a different orientation from the air stream by the first air cooling unit.

Abstract: This invention realizes an illumination optical system with a small etendue that has a longer lifetime and a high degree of brightness. The invention includes: a laser light source that generates excitation light having a first wavelength; a phosphor wheel including a blue fluorescent light generation region that generates fluorescent light having a second wavelength by means of the excitation light, and a green fluorescent light generation region that generates fluorescent light having a third wavelength by means of the excitation light; an LED light source that generates light having a fourth wavelength; and a dichroic mirror that reflects fluorescent light having the second wavelength and fluorescent light having the third wavelength and allows light having the fourth wavelength to pass therethrough, to thereby emit each of the lights in the same direction.

Abstract: A noise suppression characteristics adjustment method includes adjusting noise suppression characteristics of a noise suppressor, which includes a muffler having a reflection plate for reflecting sound from the cooling fan, the reflection plate being provided at a position in the cooling duct confronting an intake plane of the cooling fan and formed substantially parallel to the intake plane. A sound-absorbing part of the muffler is provided on the reflection plate. A distance d between the reflection plate and the intake plane is set such that d<c/(2×f) where f is a sound-absorption frequency of the muffler and c is a speed of sound. The muffler is located inside the cooling duct. A through-hole is provided in the reflection plate. The through hole includes a plurality of through-holes. A resonance frequency of the resonator sound absorber is adjusted by blocking at least one of the plurality of through-holes.

Abstract: A cooling apparatus includes a tank for keeping a coolant liquid therein and including an air layer, a heat receiver in contact with a heat generating part for receiving heat therefrom, a radiator for radiating the heat absorbed by the coolant liquid, and a circulating mechanism for circulating the coolant liquid from the heat receiver through the tank, through the radiator and again to the heat receiver. The tank is mounted on the radiator. The radiator includes a coolant liquid circulating conduit for radiation which includes a width narrower at the middle position of the tank, and is divided by a gap at the middle position of the tank. The radiator includes cavities on both sides of a portion in which the gap in the coolant liquid circulating conduit is formed, each of the cavities having an area covered with the tank mounted on the radiator.

Abstract: An illumination apparatus includes a fluorescence unit, laser light irradiation means, and a beam integration unit. The fluorescence unit has a plurality of phosphors, in which the colors of fluorescence generated due to excitation differ, arranged in different regions. The laser light irradiation means irradiates laser light onto the regions of each color of the fluorescence unit while changing the position at which the laser light strikes the fluorescence unit. The beam integration unit integrates fluorescence from each region of the fluorescence unit on a display panel.

Abstract: This invention realizes an illumination optical system with a small etendue that has a longer lifetime and a high degree of brightness. The invention includes: a laser light source that generates excitation light; a phosphor that generates a fluorescent light by means of the excitation light; a light tunnel that projects the excitation light that is incident at one end towards the phosphor from another end, and projects a fluorescent light generated with the phosphor from the one end; and a dichroic mirror that is provided between the laser light source and the light tunnel, and that allows the fluorescent light or the excitation light to pass through, and reflects the remaining excitation or fluorescent light.

Abstract: A noise suppression characteristics adjustment method includes adjusting noise suppression characteristics of a noise suppressor, which includes a muffler having a reflection plate for reflecting sound from the cooling fan, the reflection plate being provided at a position in the cooling duct confronting an intake plane of the cooling fan and formed substantially parallel to the intake plane. A sound-absorbing part of the muffler is provided on the reflection plate. A distance d between the reflection plate and the intake plane is set such that d<c/(2×f) where f is a sound-absorption frequency of the muffler and c is a speed of sound. The muffler is located inside the cooling duct. A through-hole is provided in the reflection plate. The through hole includes a plurality of through-holes. A resonance frequency of the resonator sound absorber is adjusted by blocking at least one of the plurality of through-holes.

Abstract: A liquid crystal projector apparatus has a liquid crystal unit having a liquid crystal panel for modulating light, an incident side polarizing plate and an exit side polarizing plate disposed in front of and behind the liquid crystal panel along the optical axis, respectively, a first holder member for holding the liquid crystal unit, a first heat exchanger disposed in close proximity to the first holder member for dissipating heat generated by the liquid crystal unit and then conducted to the first holder member using a coolant liquid which passes through a first channel formed inside the first heat exchanger, a pump for circulating the coolant liquid, and a radiator for cooling the coolant liquid.

Abstract: A noise suppressor for an apparatus having a cooling fan and cooling duct includes a muffler including a reflection plate for reflecting sound from the cooling fan, the reflection plate being provided at a position in the cooling duct confronting the intake plane of the cooling fan and formed substantially parallel to the intake plane. A sound-absorbing part of the muffler is provided on the reflection plate, and a distance d between the reflection plate and the intake plane is set such that d<c/(2×f) where f is the sound-absorption frequency of the muffler and c is the speed of sound.

Abstract: A projection-type image display apparatus that enlarges and displays an image includes: a case, a laser light source, a cooling mechanism that includes a component that produces vibration during operation, a diffuser that diffuses light that is emitted from the laser light source, optics that shape light diffused by the diffuser to light having a uniform luminance distribution and rectangular cross-section, and an optical modulation element that modulates light shaped by the optics; wherein the component included in the cooling mechanism and the diffuser are connected by way of a vibration transmitting member.

Abstract: A cooling device for use in an electronic apparatus is capable of achieving a sufficient cooling capability with an effective replacement method in a narrow flow path. The cooling device for the electronic apparatus, which includes a plurality of members juxtaposed such that surfaces thereof confront each other, at least one of the members including a heat radiating surface, includes a first air-cooling member which includes a first outlet port that creates a first air stream, and a second air-cooling member which includes a second outlet port that creates a second air stream to flow in a direction different from the first air stream. The first and second outlet ports have different opening widths, respectively.

Abstract: A liquid crystal projector apparatus has a liquid crystal unit having a liquid crystal panel for modulating light, an incident side polarizing plate and an exit side polarizing plate disposed in front of and behind the liquid crystal panel along the optical axis, respectively, a first holder member for holding the liquid crystal unit, a first heat exchanger disposed in close proximity to the first holder member for dissipating heat generated by the liquid crystal unit and then conducted to the first holder member using a coolant liquid which passes through a first channel formed inside the first heat exchanger, a pump for circulating the coolant liquid, and a radiator for cooling the coolant liquid.

Abstract: A cooling apparatus includes a tank for keeping a coolant liquid therein and having an air layer, a heat receiving element in contact with a heat generating part to receive heat therefrom, a radiator for radiating heat absorbed by a coolant liquid, and a circulating mechanism for circulating the coolant liquid from the heat receiving element through the tank and through the radiator again to the heat receiving element. The tank has a conduit forming area for forming a coolant liquid circulating conduit to pass through a middle position of the tank, and a narrow gap which divides the conduit forming area at the middle position of the tank.

Abstract: A liquid crystal projector apparatus has a liquid crystal unit having a liquid crystal panel for modulating light, an incident side polarizing plate and an exit side polarizing plate disposed in front of and behind the liquid crystal panel along the optical axis, respectively, a first holder member for holding the liquid crystal unit, a first heat exchanger disposed in close proximity to the first holder member for dissipating heat generated by the liquid crystal unit and then conducted to the first holder member using a coolant liquid which passes through a first channel formed inside the first heat exchanger, a pump for circulating the coolant liquid, and a radiator for cooling the coolant liquid.

Abstract: A silent cooling apparatus for effectively reducing the operating temperature of an electronic device includes a plurality of components which include surfaces opposite to each other with a spacing therebetween and have a heat generating spot on at least any of the surfaces opposite to each other, in a small and low-cost configuration. The apparatus for cooling a heat generating spot of an electronic device includes a cooling apparatus for forcedly air-cooling a heat generating spot of an electronic device which includes a plurality of components which are disposed side by side to have the same in-plane direction, and include heat generating spots within their surfaces. The cooling apparatus includes a first air cooling unit for feeding an air stream to the heat generating spot in an orientation of the in-plane direction, and a second air cooling unit for feeding an air stream to the heat generating spot in the in-plane direction in a different orientation from the air stream by the first air cooling unit.

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 magnetic head positioning mechanism is provided which is excellent in shock-resistance and can achieve high positioning accuracy. By constructing the magnetic head positioning mechanism so that a fine actuator section is composed of an actuator spring made from a thin steel plate, a base plate made from a thick steel plate to be junctioned to the actuator spring, stiffness of the fine actuator section in a vertical direction can be improved with flexibility of a driving spring section mounted on the actuator spring being still kept, that is, with sufficient positioning accuracy and satisfactory stroke being maintained. Moreover, by designing a strength of the fine actuator section so that the actuator spring and a holder arm do not overlap when the base plate is connected to the holder arm, the fine actuator section can be made thin and implementing of the fine actuator section among narrow plates in a positioning device is made easy.

Abstract: A cooling apparatus comprises a tank for keeping a coolant liquid therein and having an air layer, a heat receiving element in contact with a heat generating part to receive heat therefrom, a radiator for radiating heat absorbed by a coolant liquid, and a circulating mechanism for circulating the coolant liquid from the heat receiving element through the tank and through the radiator again to the heat receiving element. The tank has a conduit forming area for forming a coolant liquid circulating conduit to pass through a middle position of the tank, and a narrow gap which divides the conduit forming area at the middle position of the tank.