Abstract: A liquid crystal viewfinder includes a plurality of liquid crystal display sections for respectively displaying images of a plurality of colors so as to obtain a full-color image, and an eyepiece. The liquid crystal display sections are arranged on the same plane along an outer side surface of an image pick up apparatus. The eyepiece is arranged outside the liquid crystal display sections in such a manner that the optical axis of the eyepiece is set to be substantially parallel to the direction in which the liquid crystal display sections are arranged. An image light reflecting mirror is arranged on the incidence side of the eyepiece so as to reflect an image light beam from one of the liquid crystal display sections to the eyepiece.

Abstract: A liquid crystal projector of the type, wherein the light emitted from a light source is split into a red beam, a green beam, and a blue beam, and these beams are applied to red-image, green-image, and blue-image display LCD panels, the red-image beam, the green-image beam, and the blue-image beam emerging from these LCD panels are combined and projected by a projection lens, thereby to form a full-color image. The projector has an optical system which guides the beams such that these beam have optical paths of the same length which extend from the light source or the LCD panels to the projection lens.

Abstract: A liquid crystal projector includes a liquid crystal panel, a light source for illuminating the liquid crystal panel, a back-projection type screen having on its surface a lenticular lens in which many vertical or horizontal stripe lenses are arranged in parallel, a projection lens for enlargedly projecting light transmitted through the liquid crystal panel onto the back-projection type screen, a light-falling polarized plate arranged between the light-falling plane of the liquid crystal panel and the light source, for transmitting the light from the light source, and oscillating in a predetermined direction, to fall on the liquid crystal panel, and an image-forming polarizing plate arranged between the light-outgoing plane of the liquid crystal panel and the projection lens or in a projection path from the projection lens to the screen, to allow the liquid transmitted through the liquid crystal panel, and oscillating in a predetermined direction, to pass through, thereby forming a light image.

Abstract: An elongated X-shaped prism comprising an X-shaped combination of four transparent plates and one central rectangular solid block member. The four transparent plates are disposed in an X-shaped state and each has one side edge adhered to a corresponding side-face of the central member, the width of each side-face of the central member being equal to thickness of each of the four transparent plates. The central member has a refraction index which is higher than the refraction index of the transparent plates. One side surface of the transparent plates is coated with an optical layer.

Abstract: A back-surface projection screen for observing a light image, projected from the rear surface of a screen, on a major surface of the screen comprises a lenticular lens constructed of a greater number of lens units in a continuous array with a top surface section defined as a lens section and with a pair of total-reflection surfaces formed as side convex lenses relative to a central convex lens section formed at the lens section. A pair of linear surfaces are formed one at each of the total-reflection surfaces in an opposed relation with the central lens section located therebetween. The total-reflection surfaces are so curved as to allow light which is incident on the screen from behind to be condensed by reflection toward the linear surfaces. The lens section of each lens unit in the lenticular lens is recessed at the central section to define that center convex lens surface there with the pair of side total-reflection surfaces formed as a pair of convex lens.

Abstract: A projection display apparatus includes a light source unit for generating light for image formation, an electro-optical display device for displaying an optical image by utilizing the light emitted from the light source unit, and an enlarging/projection lens. The light source unit, the display device, and the projection lens are accommodated in a housing with vent openings. The housing also includes a fan for cooling the interior of the housing with cool air and a cooler for maintaining a display panel within a predetermined temperature range. The light source unit includes a lamp and a reflector and is designed not to cause image deformation and formation of a shadow of a discharge portion. In order to display a television image on the display device, all television image display circuit units excluding an antenna are accommodated in the housing. The enlarging/projection lens can control a magnification and a focal point of the image projected on the screen.

Abstract: A projection lens, for enlarging and projecting an image displayed on a liquid crystal display panel onto a transmission type screen provided at a display window of a projector case, is arranged so that its optical axis is perpendicular to the optical axis of projection toward the transmission type screen. At least one mirror, for reflecting an image projected through the projection lens toward the transmission type screen, is arranged between the projection lens and the transmission type screen. The liquid crystal display panel is arranged such that its optical axis is perpendicular to the optical axis of the projection lens. At least one mirror, for reflecting an image displayed on the liquid crystal display panel toward the projection lens, is arranged between the liquid crystal display panel and the projection lens.

Abstract: A liquid crystal projector is disclosed, which comprises a light source, a TV type liquid crystal display panel and a projecting lens system. The liquid crystal display panel faces the screen and is inclined with respect to a line perpendicular to an optical axis connecting the center of the liquid crystal display panel and the center of a screen by the suitable visual field angle of the liquid crystal display panel.

Abstract: A projection display apparatus includes a light source unit for generating light for image formation, an electro-optical display device for displaying an optical image by utilizing the light emitted from the light source unit, and an enlarging/projection lens. The light source unit, the display device, and the projection lens are accommodated in a housing with vent openings. The housing also includes a fan for cooling the interior of the housing with cool air and a cooler for maintaining a display panel within a predetermined temperature range. The light source unit includes a lamp and a reflector and is designed not to cause image deformation and formation of a shadow of a discharge portion. In order to display a television image on the display device, all television image display circuit units excluding an antenna are accommodated in the housing. The enlarging/projection lens can control a magnification and a focal point of the image projected on the screen.

Abstract: In a liquid crystal projector wherein a light source is arranged behind a transmission liquid crystal display panel having a rectangular display portion, an image displayed on the liquid crystal display panel is enlarged by a projection lens, and an enlarged image is projected on the screen located in front of the liquid crystal display panel, a linear Fresnel lens is arranged between the light source and the liquid crystal display panel to narrow illumination light beam from the light source along only the widthwise direction of the rectangular display portion. When the illumination light beam from the light source is narrowed along only the widthwise direction of panel, the amount of unused light beam emitted outside the long sides of the display portion can be reduced, and the light beam from the light source can be effectively utilized for image projection.

Abstract: A liquid-crystal projector reduces outer portions of a light beam corresponding to a projection image from a liquid-crystal display panel illuminated with light from a light source by a light beam width reduction lens array in order to increase the luminance of the outer beam portions. The projection image passing through the light beam width reduction lens array is compensated for attenuation in luminance of the outer beam portions, and is then projected onto a screen surface through a projection lens system.

Abstract: A sheet-like miniaturized electronic device includes an electronic component assembly with a wiring base having switch contacts and a semiconductor IC chip operated by signals from the switch contacts. A display panel displays data according to signals from the semiconductor IC chip, and a battery supplies a drive voltage to the semiconductor IC chip. The wiring base, display panel and battery are electrically connected to one another and arranged in the same plane. An upper cover is provided in close contact with the upper side of the electronic component assembly, and has an operating section and a transparent display window. A lower cover is provided through an adhesive layer to the underside of the electronic component assembly.

Abstract: A method of manufacturing a small electronic device includes intermittently feeding predetermined length of a base film, which forms a film strip; arranging electronic elements, e.g., a film-like liquid crystal display cell, a film-like solar cell and a printed circuit board, on a predetermined region of the film strip; arranging a frame on the film strip, so that the frame surrounds the electronic elements; depositing an adhesive onto the film strip; placing a panel on the film strip; moving press means on the panel from one end of the panel to the other end thereof, thereby pressing the panel and bonding the same to the film strip; and cutting the film, thereby forming a semifinished product. This method further includes detecting the position of the periphery of the semifinished product and trimming unfinished portions with a laser beam, thereby forming a finished product of a prescribed shape and size.