Sony Corporation

Nobuo Kitamura

Kunio Shikakura

Kimiyoshi Yoshida

Hideshi Tamaru

Akio Sakano

Takao Mogi

Katsuo Takada

Hiroshi Fukagawa

Namio Maeda

A coordinate position digitizing system comprises a position determining plate having a plurality of first conductors extending in parallel with one another at regularly spaced intervals. A plurality of second conductors also extend in parallel with one another at regularly spaced intervals and across the first conductors. Driving and controlling means are provided in common to the first conductors and the second conductors for selectively energizing in turn one or more of the first conductors and second conductors, for example, by supplying a direct current flowing therethrough. Pick-up means, such as a magnetic flux detecting means, is movably set on the position determining plate for producing a signal in response to field variations on the position determining plate caused by the selective energization of the first conductors and second conductors. Information producing means produces positional data defining a position on the position determining plate to which the pick-up means is brought close, based on the strength of the signal drived from the pick-up means.

Coordinate position digitizing system for determining position of a

A coordinate position digitizing system to be used with a cathode ray tube, comprises a position determining plate having a plurality of conductors extending parallel with one another at regularly spaced intervals, and driving means for supplying a constant current selectively to the conductors, one after another, within a horizontal scanning period of the cathode ray tube. Magnetic flux detecting means detects magnetic flux on the position determining plate, and a band pass filter eliminates a noise component resulting from the deflection magnetic field of the cathode ray tube. Positional data defining a position of the magnetic flux detecting means on the position determining plate is produced in response to the output of the band pass filter.

Coordinate position digitizing system

A large-scale color picture display system comprises a plurality of fluorescent display cells arranged in an X-Y matrix to form a picture display device. Each display cell comprises a red, a green, and a blue fluorescent display element. Each of the display cells is provided with a horizontally-extending blind adjacent its upper edge. The blind has a black top surface to absorb light from the sun and sky, and a reflecting bottom surface to form a virtual image of part of the display cell so that a viewer situated below the color picture display device will see a picture which is continuous in the vertical direction. The reflecting bottom surface of the blind is electrically conductive and is grounded to prevent it from being electrified, for example by lightning, and to eliminate undesired radiation from the display system.

Display system comprising a plurality of display cells arranged in an

A coordinate position digitizing system comprises a position determining plate having a plurality of first parallel strip electrodes provided on one surface of a insulating layer to form plural groups thereof each connected in common and a plurality of second parallel electrodes each having the width wider than that of each of the first electrodes and provided on the other surface of the insulating layer to extend in the direction perpendicular to the first electrodes, a detecting electrode provided to face to the surface of the insulating layer on which the first electrodes are provided and connected through a predetermined capacitance to a reference potential point for producing a signal in response to a voltage obtained thereat, driving and controlling means for supplying with a constant voltage selectively to the groups of the first electrodes one after another during a first period and also supplying with the constant voltage selectively to the second electrodes one after another during a second period, and means for producing positional data defining positions of the detecting electrode on the position determining plate in both the direction of arrangement of the first electrodes and the direction of arrangement of the second electrodes in response to the signal derived from the detecting electrode.

A channel selecting and indicating apparatus for a television receiver includes a plurality of channel selecting variable resistors and a cover for the channel selecting variable resistors and having a plurality of channel indicating windows. In the channel selecting and indicating apparatus, channel indicating tabs each indicating the number representing a selected channel are mounted onto the channel indicating windows from behind the cover after the channel selecting variable resistors are preset to desired channels respectively.

Channel indicating apparatus

A channel indicator device is disclosed in which a tuner for achieving station selection between VHF and UHF band television broadcastings is provided in association with a single channel selection shaft of the tuner, a switch for band selection is also provided in connection with the channel selection shaft, and an indicator in the type of a plural-unit indication is provided, the indicator having a numeral corresponding to a selected channel in response to the channel selection and a code corresponding to a selected one of the VHF and UHF bands. The indicator has provided with a plural-unit indication member consisting of a plurality of indication elements to form a numeral '8'.

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Sagamihara, Japan

Nobuo Kitamura