Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel
Patent
1989-12-18
1994-02-01
Weldon, Ulysses
Computer graphics processing and selective visual display system
Display peripheral interface input device
Touch panel
341 33, G09G 302
Patent
active
052835561
ABSTRACT:
A tablet integrated with a display comprising a matrix panel having row and column electrodes, a detecting conductor, a row electrode driver, a column electrode driver, a row coordinate detecting circuit and a column coordinate detecting circuit, in case of display mode, the row electrode driver applying the row scanning pulse successively to every row electrode of the matrix panel from one to another, and the column electrode driver applying voltage in accordance with the display data simultaneously to the column electrode of the matrix panel each time the row scanning pulse is applied successively to the row electrode of the matrix panel, in case of row detection mode, the row electrode driver applying the row scanning pulse successively to the row electrode of the matrix panel, and receiving the row scanning pulse detected through electrostatic capacitive coupling caused by the detecting conductor touching an arbitrary position on the matrix panel, so as to present the row coordinate of the position which the detecting conductor touches, and in case of column detection mode, the column electrode driver applying the column scanning pulse successively to the column electrode of the matrix panel, and the column coordinate detecting circuit receiving the column scanning pulse detected through electrostatic capacitive coupling caused by the detecting conductor touching an arbitrary position on the matrix panel, so as to present the column coordinate of the position which the detecting conductor touches.
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IEEE Communications Magazine, Jul. 1986, vol. 24, No. 7, pp. 18-23 entitled "Man-Machine Interfaces in the Office Communications Systems".
Liang Regina
Sharp Kabushiki Kaisha
Weldon Ulysses
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