Abstract: An optical prism 100 for reflecting light incident on its light incidence surface 12 suited for incidence of light from an LCD 20 at least twice within itself and emitting the reflected light as emitted light from a light emission surface 14 to the outside. The optical prism is coupled in use with a display element support 30 adapted to suit it. The side surfaces of the optical prism crossing the light incidence surface 12 and light emission surface 14 have projections 90L and 90R for mounting the optical prism on the display element support.

Abstract: An image and voice communication system of the present invention has an image display element and a voice output element which are suitable for image and voice communication, and further includes a character image setting element capable of imaginatively setting a character image to be displayed on the image display element; a change command receive element for receiving from a communication mate a command signal for changing the character image; a character change element for changing the character image according to the command signal; and an element for causing the display element to display a character image changed by the character change element by supplying the changed character image to the display element.

Abstract: A wiring board manufacturing system, which is an electric wiring forming system, utilizes a magnesium alloy as a conductive metal for wiring pattern forming, and mixes and heats the magnesium alloy chips thereof in a cylinder (feeding unit) with a built-in screw, melting same into an alloy slurry of a thixotropic state. The alloy slurry thereof is discharged onto a board. Meanwhile, the above-mentioned board is mounted on a work stage 55 of a stage unit, which is driven and controlled in accordance with wiring pattern data inputted by a CAD or the like, and a wiring pattern is formed on the board with the above-mentioned discharged alloy. According to this system, it is possible to provide an electric wiring forming system, which does away with the effects on the environment resulting from waste liquid at manufacturing, enables manufacturing time to be shortened, and moreover, uses an inexpensive metallic material for forming a wiring pattern.

Abstract: Three lines' worth of an image are displayed on a columnar display unit 11 comprising a plurality (for example, three) of one-dimensional display devices; this image light beam is made incident on perpendicular deflection means 14, and using the perpendicular deflection means 14, this image light beam is deflected and scanned at high speed in directions perpendicular to the longitudinal direction of the columnar display unit 11 to obtain a two-dimensional image. A plurality of one-dimensional display devices is used, so that compared with conventional devices in which only a single one-dimensional display device is used, even if the rewrite speed (scanning speed) per one-dimensional display device is slow, good image quality free of flicker can be obtained. By further extending this in a configuration using a plurality of columnar display units, a single image can be divided into a plurality of images and displayed in a row on a screen.

Abstract: A second inverter portion having a similar configuration to a first inverter portion is connected in parallel with the first inverter portion which consists of an inverter circuit and an inverter driving circuit. If an inverter current detector detects abnormality of an electric current flowing through the inverter circuits in use of the first inverter circuit, use of the second inverter portion is allowed by switching a switch.

Abstract: It is the object of the invention to provide a compact and highly stable head-mount image display apparatus capable of always transmitting voice information of an optimal volume, irrespective of the positional relationship between the head and the ear of an observer, which is related to the shape and/or size of the head. To attain the object, speakers incorporated in the apparatus of the invention can be moved to desired positions in accordance with changes in the positional relationship between the head and the ears of observers. Further, the apparatus of the invention can be folded to reduce the area the apparatus occupies.

Abstract: A head mounted image display includes a display body having image display sections and optical systems and a supporting section for fixing the display body in front of the eyes of an observer so that the observer can view the image display sections with his eyes. The supporting section has at least four supporting points, which are arranged so that at least one supporting point is placed outside a plane formed by at least three supporting points. Thus, the observer can comfortably wear the display.

Abstract: A head mounted image display includes an image display body for projecting an image on each eye of an observer and a mount supporting device capable of removably mounting the image display body on the observer's head. The mount supporting device has a sinciput contact member and left and right occiput contact members. When the sinciput contact member and the left and right occiput contact members come into contact with the corresponding parts of the head, resistance forces are produced in the contact parts of the left and right occiput contact members by the moment of gravity of the image display body. The image display body can be supported by the contact force of the sinciput contact member and the resistance forces acting on the contact parts of the left and right occiput contact members. In this way, the image display body is firmly supported in a correct mounting state and an image observation can be favorably made.

Abstract: A high voltage power supply system includes a DC-to-DC converter for producing a DC low voltage, a DC-to-AC inverter connected to a step-up transformer for producing an AC high voltage by transforming an AC low voltage obtained from the DC low voltage, and an inverter controller for controlling an operation time period of the DC-to-AC inverter longer than that of the DC-to-DC converter. Since a residual charge stored in a capacitor of the DC-to-DC converter is rapidly discharged by lengthening the operation time period of the DC-to-AC inverter, an unwanted AC high voltage is induced at a secondary winding of the step-up transformer.