摘要:
A fingerprint sensor is disclosed, which employs a plurality of tactile sensors, each has an elastic insulating body between a member of an electrically conductive material, i.e., a gate electrode, and an insulating film deposited on a channel region of a field-effect transistor (FET). The channel region is formed between a source region and a drain region. Each of the tactile sensors is connected in series with a transistor that serves as a source of constant or steady current to form a source follower circuit. With the source follower circuit, output of each of the tactile sensors is converted into source voltage. The source voltage of each of the source follower circuits is extracted via a first switching element at a common output terminal. The source follower circuits are connected via a second switching element to a source of electric power.
摘要:
The present invention provides an image display apparatus capable of easily displaying a bright image having a sufficiently great field of view. The image display apparatus comprises: an optical scanner provided on a bow portion of a spectacle frame and having a movable mirror for deflecting/scanning a beam modulated by a video signal; and a first curved mirror and a second curved mirror provided at right and left of the lens for successively reflecting and focusing the scan beam to be projected into a pupil of a user to form a scanned image on a retina.
摘要:
It is the object of the invention to provide a field emission cathode apparatus comprising plural electron-emitters which eliminates nonuniformity of electric emission density over an emissive area, controls emission currents by active devices, and improves reliability of the apparatus. P-type silicon 5 and n-type silicon 4 are formed on n.sup.+ -type silicon 6. On n-type silicon 4, an electron-emitter 1 made of Mo is formed, and electron-emitter 1 is surrounded by a grid electrode 2 and an insulator layer 3. N-type silicon 4 serves as a channel region of a junction gate field effect transistor, and a current flowing through it is controlled by a voltage applied to p-type silicon 5. Accordingly, an electron current emitted from electron-emitter 1 is also controlled by this transistor, and by setting up an operation region of this transistor in a saturation current region, nonuniformity of electron emissions from electron-emitters can be improved. Even when a portion of cathodes is damaged, the damage is not magnified to the whole apparatus, and the life of the field emission cathode can be prolonged.
摘要:
A second ground plane (18); has one end opposite to a connector (14), which end is connected to a first ground plane (17) by resistor connection element (41). Accordingly, it is possible to lower Q of resonance of the ground structure by the resistor connection element (41) and to prevent generation of an intense electromagnetic field attributed to an electromagnetic field of a data processing circuit. Especially when the resistor connection element (41) has a resistance value identical to a characteristic impedance of the ground structure, the ground structure is terminated in a matched way and it is possible to assure prevention of generation of an electromagnetic field attributed to resonance.
摘要:
A current restriction structure for restricting a higher-harmonic-wave current generated in a digital circuit block from entering a radio circuit block and/or a radio-frequency current generated in the radio circuit block from entering the digital circuit block is disposed between the radio circuit block and the digital circuit block. The current restriction structure is formed by one or two of equivalent rectangular cylindrical metallic tube including metallic planes overlying/underlying the ground layer and a narrow-pitch via-hole array, which are disposed to enclose the subject current to be restricted and have a short-circuited distal end. The distance between the open plane of the equivalent rectangular cylindrical metallic tube and the short-circuiting plate is set at ¼ of the wavelength of the subject current to be restricted.
摘要:
Second ground plane (18), substantially rectangular in shape, is connected to first ground plane (17) mounted with a data processing circuit, and radio communication circuit (12) makes radio communications at communication wavelength λ. A portion of second ground plane (18) from ground connecting means (14) to ground connecting means (33) along continuous edges of second ground plane (18) acts as an antenna. However, since the longest distance a between a plurality of ground connecting means (14, 33) along the continuous edges of second ground plane (18) satisfies “a
摘要:
An electronic apparatus comprises a function module having a multilayer wiring unit including a first signal wiring corresponding to an internal layer wiring, a first signal via, a first reference potential wiring, a first signal pad to which the first signal wiring is connected through the first signal via, a first reference potential pad that surrounds the periphery of the first signal pad and to which the first reference potential wiring is connected, and a first reference potential connected to the first reference potential pad; a inultilayer circuit board; a first conductor; and a second conductor.
摘要:
There is provided an apparatus for three-dimensionally displaying an object, including (a) image-displaying devices which display images at an observer's eyes, (b) a beam scanner, (c) an area-identifier which detects a direction on which an observer turns at least one eye to thereby identify a display area at which the observer gazes, (d) a calculator which calculates, based on an image signal including parallax, a three-dimensional positional relation between the observer and an object to be observed, existing in the display area, (e) an image-position controller which controls positions of images so that the object is displayed in the display area at locations on lines connecting the object located at a three-dimensional position calculated by the calculator to centers of pupils of the observer, and (f) a convergence generator which generates a difference between first timing at which the beam scanner is driven and second timing at which images start being displayed in the image-displaying devices, in accordance with a degree of convergence, and varies positions of images to be displayed in the image-displaying devices, in accordance with the thus generated convergence. The apparatus can accomplish compatibility in parallax and convergence to thereby reduce fatigue in an observer's eyes.
摘要:
A plasma display panel (PDP) has a plurality of scanning electrodes and a plurality of common electrodes extending in a row direction, a plurality of data electrodes extending in a column direction, and a ground electrode disposed adjacent to the data electrodes for canceling the electromagnetic radiation from the data electrodes during a write period of the PDP.
摘要:
An image display device of the present invention comprises a light converting means which converts picture signals into light beams, and a light beam scanning means which scans by beams. The light beam scanning means is provided with an x-axis optical scanner and a y-axis optical scanner each of which has a moving mirror and an excitation means. The moving mirror reflects a light beam from a light source in cascade, reflection directions being subjected to a perpendicular resonance rotation oscillation with each other because of a light beam scanning, each resonant rotation oscillation having a resonance frequency which is the same with or close to the other and being phase shifted by 90.degree. with respect to the other while having a predetermined oscillation ratio. The light beam scanning means implements a light beam scanning in a circumference direction of a circle having its center at a certain point on a screen or on a retina of a human eye, thus forming a picture image having a scanning line structure of a concentric circle form or a spiral form, with the pixels having been altered their density or size in accordance with a distance from the center.