Abstract: An ion wind generator is arranged in the vicinity of a light source. The ion wind generator allows an air flow by negatively ionizing air by corona discharges using negative side needle electrodes, and drawing the negatively-ionized air using a ground side mesh electrode. High-temperature air surrounding the light source is drawn by the air flow and exhausted from an exhaust port at a rear side of a casing. An ozone decomposition catalyst filter is provided in the exhaust port. Ozone (O3) is generated by the corona discharges in the ion wind generator. However, the ozone is decomposed by passing through the ozone decomposition catalyst filter provided at the exhaust port.

Abstract: In a vehicle-mounted navigation system, an operating unit that operates the driver's seat side image and an operating unit that operates the passenger's seat side image had to be provided separately, which increased the number of operation buttons and the size of the navigation system device. In a vehicle-mounted navigation system that displays images in multiple directions, an operating direction detector detects which direction an operation was performed from, and a controller controls the vehicle-mounted navigation system based on a detection result of the operating direction detector.

Abstract: An illumination apparatus includes a plate-like separation optical element having a dichroic surface and a PBS surface. The dichroic surface reflects green component light and transmits yellow component light. The PBS surface transmits P polarization component light and reflects S polarization component light. The separation optical element combines red component light entering from a certain direction and transmitted through the dichroic surface, with yellow component light entering from a different direction and reflected by the PBS surface, and leads a combined light towards a red liquid crystal panel. The separation optical element combines green component light entering from the certain direction and reflected by the dichroic surface, with yellow component light entering from the different direction and transmitted through the PBS surface, and leads a combined light towards a green liquid crystal panel.

Abstract: An illumination apparatus includes a red light valve, a green light valve, a blue light valve, a polarization adjustment element, and a color combiner. The polarization adjustment element adjusts polarization of fourth color component light. The color combiner combines light emitted from the red light valve, the green light valve and the blue light valve. Superimposed component light which is any one of a red component light, a green component light and a blue component light enters the polarization adjustment element together with a fourth color component light. The polarization adjustment element transmits the superimposed component light without adjusting the polarization, and transmits the fourth color component light with adjusting the polarization.

Abstract: There are provided a write light valve for generating image-writing light by modulating write light, a driver for writing images into the write light valve based on image data, read light valves for each color for generating respective color image lights by modulating each received color illumination light, an imaging lens group for guiding the image-writing light emitted from the write light valve to the respective read light valves, a dichroic cube for combining together color image lights emitted from the respective read light valves, a projection lens for projecting each color image light combined together. The imaging lens group has a distortion aberration which reduces or cancels out a distortion aberration of the projection lens.

Abstract: A LED light source is formed of a plurality of LEDs (light-emitting diodes). Primary optical axes of respective LEDs are set to be perpendicular to the plane surface (LED arranging plane surface). A first LED light source emits a light in red, a second LED light source emits a light in green, and a third LED light source emits a light in blue. An optical member has a first dichroic mirror portion and a second dichroic mirror portion alternately arranged, and the mirror potions inclined and arranged so as to form a saw-tooth appearance. Both the first dichroic mirror portion and the second dichroic mirror portion are designed to transmit the light in blue, and reflect lights in other colors.

Abstract: A color separating and mixing element comprises, in its transparent cube, a first optical function surface formed on a dividing surface for dividing the cube into two triangular prisms and a second optical function surface formed on another dividing surface. The first optical function surface has the function of transmitting both P-polarized light and S-polarized light with respect to red light, has the function of transmitting both P-polarized light and S-polarized light with respect to green light, and has the function of transmitting P-polarized light and reflecting S-polarized light with respect to blue light. The second optical function surface has the function of transmitting P-polarized light and reflecting S-polarized light with respect to red light, has the function of transmitting P-polarized light and reflecting S-polarized light with respect to green light, and has the function of transmitting both P-polarized light and S-polarized light with respect to blue light.

Abstract: An ion wind generator (20) is arranged on one side of a light source (1). The ion wind generator (20) produces an air current by negatively ionizing air by corona discharges at a needle electrode (21), or negative side, and drawing the negatively-ionized air at a cylindrical electrode (22), or positive side. The air current blows toward the light source (1) and removes heat generated by the light source (1). An ultraviolet ray from the light source (1) is introduced to a vent of the ion wind generator (20) by a first dichroic mirror (4) and a ultraviolet ray reflection mirror (17). Though air exhausted from the vent includes ozone (o3) produced by corona discharges, the ozone is decomposed by the ultraviolet ray.

Abstract: The auxiliary light source has LED chips respectively emitting red lights arranged therein in an array shape, and has lens cells for parallelizing light arranged therein on the light exit side of the LED chips, for example. The LED chip is arranged in correspondence with each of lenses composing a pair of fly's eye lenses, and the pair of lenses introduces the light emitted from the LED chip into the whole surfaces of liquid crystal panels. A mixing mirror transmits white light emitted from a main light source and reflects light emitted from the auxiliary light source, and mixes the white light and the auxiliary light respectively emitted from both the light sources and introduces the mixed lights into the pair of fly's eye lenses.

Abstract: In a projection type video display apparatus comprising means for circularly scrolling and irradiating irradiated light in a direction perpendicular to the line direction on a hold-type display panel, a projection type video display apparatus comprises means for varying overdrive in conformity with the timing of irradiation of the irradiated light.

Abstract: An illuminating device includes a discharge lamp, a condenser lens, an integrator lens, a polarization conversion system, an electromagnetic wave shielding plate, and an electromagnetic wave shielding wall. A light given out from each lens in the light-incident-side fly's eye lens becomes two light fluxes via respective polarizing beam splitters and the two light fluxes pass through two lenses in the light-exit-side fly's eye lens. The electromagnetic shielding plate has an aperture on an optical axis of each lens in the light-exit-side fly's eye lens. The electromagnetic wave shielding plate is grounded through the electromagnetic wave shielding wall.

Abstract: To provide a projection type video display capable of reliably preventing a double image from being produced. A first light flux producer for producing a first light flux and a second light flux producer for producing a second light flux are arranged on the light emission side of a lamp. The light flux producer comprises a condenser lens, a rod integrator, and a pair of lenses. Lights passing through the pair of lenses are respectively refracted by condenser lenses, and are respectively introduced into first and second areas of a liquid crystal display panel in such a manner as to cross an optical surface in a color separating and mixing sector.

Abstract: A rear projection display, not requiring a dichroic prism, and capable of rendering a generation system of each image light in color independent of the other generation systems so as to optimally construct and improve easiness of assembly of, and so on, each generation system, is provided. Each unit for projecting image-light is formed of an LED array, a rod integrator, a liquid crystal display panel, and a projection lens. A projection optical axis of the projection lens of each unit for projecting image-light is parallel each other. A unit for projecting image light in red is provided with an LED array for emitting light of a wavelength band in red, a unit for projecting image light in green is provided with an LED array for emitting light of a wavelength band in green, and a unit for projecting image light in blue is provided with an LED array for emitting light of a wavelength band in blue.

Abstract: An illuminating device (1) is formed of a light source (12) in which LED chips (11) are arranged in an array shape and lens cells (14) are arranged on a light-emission side of each of the LED chips (11), and a pair of fly's eye lenses (13) that integrates and guides to a liquid crystal panel (3) the light emitted from each of the LED chips (11) and collimated by the lens cells (14). The LED chip (11) and the lens cell (14) are formed in a square shape, and an aspect ratio thereof corresponds to that of the liquid crystal display panel (3). In addition, the lens cells (14) are arranged separately from one another in such a manner to have wall surfaces (air gaps), and the wall surfaces serve as reflective surfaces.

Abstract: There is provided a single panel type video display capable of increasing the luminance of image. A color separator separates light from a light source into light beams in three colors in a band shape to emit the light beams and introduces the band-shaped light beams in the three colors so as to be overlapped with one another in a predetermined region. A lens array wheel has a plurality of functional units each composed of a convex lens of a size corresponding to the predetermined region, circularly passes the plurality of functional units each composed of the convex lens through the predetermined region, and scrolls the band-shaped light beams in the three colors in a state where they are divided among regions on a single liquid crystal display panel. A video signal is fed to the liquid crystal display panel in synchronization with the movement of the plurality of functional units each composed of the convex lens.

Abstract: A reflection mixing member (13) has an alignment in which light from a first light source is incident on a reflecting surface (13a) and light from a second light source is incident on a reflecting surface (13b). A relationship between a pitch Wp, which is a pitch between portions (triangular prisms) respectively formed of the reflecting surface (13a) and the reflecting surface (13b) in the reflection mixing member (13), and a lens pitch Wf is set to be (Wp/Wf?1). As a result, light fluxes of respectively different distribution are incident on each lens portion of fly's eye lens 14a, so that it is possible to prevent luminance non-uniformity in light incident on a liquid crystal display panel (5) from being generated and prevent color non-uniformity from being generated on a screen at the same time.

Abstract: An ion wind generator (20) is arranged in the vicinity of a light source (1). The ion wind generator (20) allows an air flow by negatively ionizing air by corona discharges using negative side needle electrodes (21), and drawing the negatively-ionized air using a ground side mesh electrode (22). High-temperature air surrounding the light source (1) is drawn by the air flow and exhausted from a exhaust port at a rear side of a casing. An ozone decomposition catalyst filter 23 is provided in the exhaust port. Ozone (O3) is generated by the corona discharges in the ion wind generator (20). However, the ozone is decomposed by passing through the ozone decomposition catalyst filter 23 provided at the exhaust port.

Abstract: An ion wind generator (20) is arranged on one side of a light source (1). The ion wind generator (20) produces an air current by negatively ionizing air by corona discharges at a needle electrode (21), or negative side, and drawing the negatively-ionized air at a cylindrical electrode (22), or positive side. The air current blows toward the light source (1) and removes heat generated by the light source (1). An ultraviolet ray from the light source (1) is introduced to a vent of the ion wind generator (20) by a first dichroic mirror (4) and a ultraviolet ray reflection mirror (17). Though air exhausted from the vent includes ozone (o3) produced by corona discharges, the ozone is decomposed by the ultraviolet ray.

Abstract: Three light sources are provided as a light source. A first light source emits a light in red, a second light source emits a light in green, and a third light source emits a light in blue. Each light source is a light source in which a plurality of LEDs (light-emitting diodes) are arranged in the same plane surface. The first light source, the second light source, and the third light source are arranged on the same plane surface. Furthermore, lines connecting the first light source, the second light source, and the third light source form a triangle. Light fluxes (primary optical axes) of each light source are parallel with each other. The first light source, the second light source, and the third light source are arranged on one piece of a cooling plate.

Abstract: A LED light source is formed of a plurality of LEDs (light-emitting diodes). Primary optical axes of respective LEDs are set to be perpendicular to the plane surface (LED arranging plane surface). A first LED light source emits a light in red, a second LED light source emits a light in green, and a third LED light source emits a light in blue. An optical member has a first dichroic mirror portion and a second dichroic mirror portion alternately arranged, and the mirror potions inclined and arranged so as to form a saw-tooth appearance. Both the first dichroic mirror portion and the second dichroic mirror portion are designed to transmit the light in blue, and reflect lights in other colors.