Abstract:
A high-accuracy high-stability capacitor type pressure sensor which eliminates a parasitic capacitance between a reference capacitor and a semiconductor substrate. A capacitor type pressure sensor comprising, on a semiconductor substrate 10, an active capacitor 100 whose capacitance varies as the surrounding pressure varies, a reference capacitor 200 whose capacitance will not vary substantially as the surrounding pressure varies, and a circuit which is electrically connected to both said active and reference capacitors 100 and 200, detects the difference or ratio thereof, and uses the potential of a semiconductor substrate, wherein an electrode 30a of said reference capacitor is formed on the semiconductor substrate 10 with a dielectric 20 therebetween.
Abstract:
A semiconductor module has a plurality of power semiconductor devices mounted on a substrate, and a metal foil for wiring is mounted on the substrate so that an asymmetric unit arrangement of the semiconductor devices is formed. In the device, all of the units are arranged in the same direction on the substrate, and all of the units are electrically connected with electrode terminal feet, and the electrode terminal feet are electrically connected with linkage terminal foot. The electrode terminal feet are disposed with a certain interval.
Abstract:
A semiconductor pressure sensor utilizing electrostatic capacitance has a plurality of pressure sensing electrostatic capacitances and a reference electrostatic capacitance formed on one side of a silicon chip. As a movable electrode, the pressure sensing electrostatic capacitances each have a diaphragm, which may have a displacement portion composed of a central area thereof, and a peripheral portion which is more deformable than the central portion.
Abstract:
In glasses for viewing stereoscopic images on a stereoscopic image display for displaying stereoscopic images by dividing a predetermined display screen into two to display a first and a second image which are viewed from different points on the divided display, a stereoscopic image can be observed without a sense of discomfort. Glasses for viewing stereoscopic images can be constructed which allow people to observe a stereoscopic image with less of a sense of discomfort by providing a sight-limitation frame for the right eye that allows only the right screen to be observed and a sight-limitation frame for the left eye that allows only the left screen to be observed.
Abstract:
A detector for detecting a physical quantity as a quantity of electricity has a detection portion, a portion for stimulating the detection portion and a signal processing portion, wherein a calibration signal is supplied from the signal processing portion to the detection portion via the stimulating portion so as to measure a specific response of the detection portion, whereby self-calibration and correction of the characteristic of the detector are performed in accordance with an amount of a change in the response.
Abstract:
A light spot determining a first condition that an optical recording medium is cooled after being heated to a temperature exceeding a first temperature and a light spot determining a second condition that the optical recording medium is cooled after being heated to a temperature exceeding a second temperature higher than the room temperature and not exceeding the first temperature higher than the second temperature, namely, the two light spots are radiated onto the optical recording medium and in the same guide track thereof wherein signals are recorded and erased on the optical recording medium by controlling the spot diameter of each light spot and/or the light intensity thereof.
Abstract:
A film of a crystal - crystal phase transformation type optical recording alloy is formed on an insulating substrate. Information is erased from the alloy film by heating it with an expedient other than a laser beam. Information is read by sensing reflected light of light projected on the alloy film.
Abstract:
A luminescent display cell comprising a glass envelope having a front panel, a side wall, and a rear plate. Plural luminescent display segments are formed on the front panel of the glass envelope, the display segments being supplied with an anode voltage. Plural cathodes are arranged on the rear panel side of the glass envelope in corresponding relation to the display segments. Plural control grid electrodes are arranged between the display segments and the cathodes in corresponding relation to the display segments. A common accelerating electrode is disposed between the display segments and the control grid electrodes. The voltage applied to each control grid electrode is controllable for electron emission from the cathodes so as to render each display segment corresponding to each control grid electrode selectively luminous for display. Furthermore, a separator surrounds each display segment and it is supplied with the above anode voltage so that diffusion lens is formed which allows the electron beam from the cathode to be spread laterally and radiated to the entire surface of the display segment to be rendered luminous.
Abstract:
An image sensor comprises a transparent substrate, an optical lens formed integrally in one major surface of the transparent substrate, and a photosensor provided on the side of the other major surface of the transparent substrate and having output electrodes, wherein light incident on the optical lens is focussed by the lens onto the photosensor through the transparent substrate.
Abstract:
A color image projecting apparatus having three cathode ray tubes which produce different respective color images and including two projecting lenses. A first primary color image reproduced on a first cathode ray tube is projected on a screen through a first projecting lens, and second and third primary color images reproduced on second and third cathode ray tubes, respectively, are synthesized by a dichroic mirror and then projected on the screen through a second projecting lens. In this case, the projecting axes of the first and second projecting lenses are arranged to converge two images passed therethrough on the screen.