Abstract: In a projection display device which can be controlled by a remote controller, the remote controller includes a power supply switch button for turning on/off a power supply at a body of the projection display device, a zoom adjuster button for adjusting the zooming of a projection lens, and a focus adjuster button for adjusting the focusing of the projection lens. The projection display device body includes a restricting system which can restrict the adjusting functions of these buttons, so that inadvertent operation of any of these buttons does not affect the projection display device.

Abstract: A color projector is made able to produce a bright and homogeneous color projection image. To this end, the color projector comprises plasma-discharge display devices (21R), (21G) and (21B) for producing respective single color images of lights of red, green and blue, a synthesizing means (22) for synthesizing the respective single color images of lights of red, green and blue from these plasma-discharge display devices and a projection optical system (23) for projecting a synthesized image from this synthesizing means (22).

Abstract: A system is provided for mounting a head-up display in a cockpit of an aircraft, the cockpit including a front region and a back region, the head-up display including a computer adapted to process flight information, an optical unit adapted to project an image corresponding to the flight information processed by the computer, and a combiner adapted to display the image projected by the optical unit. The system comprises a frame with a front region and a back region, the frame including an optical unit interface for mounting the optical unit and a combiner interface for mounting the combiner, wherein the frame is adapted to be movably coupled to the cockpit such that the frame may be moved in a generally vertical direction between a plurality of positions relative to the cockpit.

Abstract: Liquid crystal projector equipment in which light from light source 1 is condensed by lens arrays 2 and 4 and lens 5; the condensed light strikes PBS 22 where the s-polarized-light component of the green-color-range light is reflected to strike reflex liquid crystal plate for green color range, and the modulated and reflected p-polarized light component passes through PBS 22 and dichroic prism 11.

Abstract: A projector is disposed at a position that is optically conjugated to a position of eyes of an observer. The projector projects an image to a screen that has retroreflection function so as to provide information of virtual space to the observer. If a real object such as a tactile sense provision device that is to be shielded by the virtual space exists, a part or the whole of the real object is optically hidden from the projection of the projector by a shielding member having retroreflection function, for example, by placing a shielding screen on which a retroreflection material is coated, or by coating the retroreflection material.

Abstract: An apparatus and method for forming images visible to audiences includes a system for forming virtual images and creating visual effects in a stage setting. This system may include a stage and first and second flat panel video displays. The first flat panel video display is visible to the audience through a portal mirror. The second flat panel video display is not visible to the audience; however, images displayed thereon are reflected off of the portal mirror and outwardly to the audience. Finally, a performance area between the back display and the portal mirror is provided for a person or object whereby the audience may see the composite image of the images from the first and second flat panel video displays and the person or object in the performance area on-stage.

Abstract: Methods and apparatus for enhancing the performance of a reflective liquid crystal display system. The high-contrast color splitting prism system utilizes a “double-passed” prism assembly. Polarized light enters the prism assembly, is color-split and emitted as separate colors to spatial light modulators which reflect each color in accordance with a desired image. The reflective light is passed, once again, through the prism assembly where the separate colors converge and propagate to a projection lens for display of the image on a screen. A waveplate retarder is positioned between the liquid crystal display and the polarizing element. The waveplate retarder is tilted with respect to the optical axis to eliminate the deleterious effects of the Fresnel reflections at the interfaces of the waveplate retarder.

Abstract: In a projector device for magnifically projecting onto a screen a beam of light emitted from a light source which is irradiated at a mirror reflecting type light modulator after being color-separated into light beams of three primary colors and after respective light beams of primary colors modulated in the mirror reflecting type light modulator are synthesized by a color prism, a light beam emitted from a first light source is polarized into an “p” polarization by a polarization converter and a light beam emitted from a second light source is polarized into a “s” polarization by the polarization converter, thereby both light beams are synthesized by a polarization beam splitter.

Abstract: A color sequential video projector (10) employs a color modulating device (22) and a segmented light pipe (30) that coact to provide a high luminous efficiency. The color modulating device splits polychromatic light into three different colored light beams (24, 26, 28) that are positionally stationary, but alternate mutually exclusive colors sequentially with time such that each pixel of a light valve (48) is exposed to all three colors during an image frame time. The segmented light pipe receives the three light beams and forms three adjacent color bands that are precisely aligned on the light valve. Because all three colors of light are constantly illuminating the light valve, light losses are substantially eliminated. The color modulating device employs multiple color wheels (82, 84, 86) each having filter segments (90, 92, 94) that form the three light beams by reflecting the alternating, mutual exclusive colors as the wheels rotate.

Abstract: A built-in kitchen which has a projector that projects an image and a screen onto which the image from the projector is projected. The projector projects a cooking assisting image such as recipe on the screen so that a cook can get cooking information through the projected image while staying in a working position.

Abstract: A projection type color image display apparatus of the present invention includes: a light source section for generating white light beams; a first fly-eye lens array comprising a plurality of lenses for forming a plurality of secondary light source image spots of the light source section; a second fly-eye lens array comprising at least the same number of lenses as the first fly-eye lens array, provided near a position where the plurality of secondary light source image spots are formed by the first fly-eye lens array; a microlens array comprising a plurality of microlenses, wherein the light beams which have passed through the respective lenses of the second fly-eye lens array are superimposed on one another on the microlens array; a single image display device comprising a plurality of color pixels arranged in a predetermined arrangement for modulating the light beams from the microlenses; a color separator provided in a predetermined position in an optical path from the light source section to the microlen

Abstract: A projection-type display device for displaying an image using a projector device emitting optical images spatially modulated by reflection-type liquid crystal panels onto a screen, wherein phase difference plates are arranged at the incidence planes of the reflection-type liquid panels so as to cancel out the retardation comprised of the retardation corresponding to one-quarter of the wavelength of the incident light due to the polarization beam splitter plus the retardations due to the dichroic mirrors of the color separating and synthesizing means, whereby it is possible to make the illumination light leaking from the polarization beam splitter to the projection lens at the black level portions extremely small and possible to prevent a reduction in the contrast due to the haze phenomenon.

Abstract: Certain optical imaging systems exhibit disparate vertical and horizontal image focal surfaces; at least one of which is tipped with respect to the optical axis. The projection optics which illuminates such systems must provide that the vertical image components focus upon the nominal vertical image surface, while the horizontal image components focus on the disparate horizontal image surface. Because at least one of these image surfaces may be tilted with respect to the projection axis, correction is required to maintain focus over the entire image surfaces and to eliminate keystoning. The system may also require differing vertical and horizontal image magnifications as projected upon the above disparate focal surfaces. This invention describes, inter alia, the techniques for meeting these varied requirements; to project a rectilinear object field such that it forms a final focused rectilinear image in a system having tipped and disparate image planes.

Abstract: The present invention relates to a projection type display using a transmission type liquid crystal light valve and its object is to provide a projection type display which does not reduce the reliability due to the change of the working environment. A projection type display of the present invention comprises liquid crystal light valves 4R, 4G and 4B arranged in a body which modulate and emit an incident light form the lamp 2, fans 10 and 12 for cooling the inside of the body, a temperature detecting element 30 for detecting the temperature in the vicinity of the liquid crystal light valve 4G and a control unit 8 for controlling rotational frequencies of the fans 10 and 12 and for controlling on/off of a power source 26 of the lamp 2 based on a compensated temperature after compensating the temperature detected by the temperature detecting element 30 by a predetermined temperature compensation value T0.

Abstract: There is provided an optical device comprising an illuminant for emitting light; light condensing means composed of a reflecting mirror whose shape of reflecting plane is of rotational secondary curved surface and a condenser lens for converging approximately parallel fluxes; a mixing rod whose section is quadrangle, first lens means composed of at least one lens; and a reflecting optical element which is disposed in the vicinity of the position where a plurality of tertiary illuminants are formed and which reflects light in a desired direction. This optical device allows a distribution of illuminance whose intensity is excellently uniformed to be obtained even when a light flux is inputted from a direction inclined from the normal direction of the plane-to-be-illuminated by illuminating the optical device disposed out of an optical axis of the illuminator.

Abstract: An illumination device and an image projection apparatus having the same. The illumination device has a light source with multiple light emitting devices and an uniform illuminating means evenly distributed in front of the light source. The light emitted from the light source can thus uniformly project on a light valve. In addition, a polarization converter is used to convert the light into a usable polarization type, so as to increase the illumination efficiency. The image projection apparatus basically has three of the above mentioned illumination devices to emit three elementary color lights projecting onto a screen.

Abstract: In a projection display device 1, emergent light from an illumination optical system 80 is diffused by microlenses 101 provided in a liquid crystal light valve 100R. Emergent light from the liquid crystal light valve 100R diffused by these microlenses 101 is efficiently drawn into a projection optical system 60 whose f-number is set to be less than the f-number of the illumination optical system 80. As a result, it is possible to prevent light utilization efficiency from being deteriorated due to light diffusion by the microlenses 101. Consequently, it is possible to obtain a bright projection image in a projection display device in which a liquid crystal light valve having microlenses is incorporated.

Abstract: The optical system comprises a convergent mirror (Ec) and a plane mirror (Ep), which are duly positioned in order for the focus (F) established in the optical axis (X—X) of the convergent mirror (Ec) in turn to be located in the sector lying between both mirrors. An object (I1-I2) located in an area (1) is first reflected onto the plane mirror (Ep) and then onto the convergent mirror (Ec), yielding an image (I″1-I″2) in an area (2) opposite the area (1) in a normal position for an observer located at a point (O) outside the system, i.e. in such a position that the signs are legible.

Abstract: A head mounted projection unit (16) and system (30) is disclosed. The unit includes a tapered optical relay that allows the use of a simple optical projection system. The unit further includes structure for allowing the transmission of images having both low resolution portions and high resolution portions.

Abstract: An image display apparatus having a storage display device which stores an image written by writing light representative of the image and displays the stored image, includes a density detecting device for detecting a density of the storage display device and a control device which brings image writing to an end when the density detected by the density detecting device reaches a predetermined density after the image writing to the storage display device is started.