Input system with detection of coordinates

Details Input system with detection of coordinates Input system with detection of coordinates

2007-03-06

2007-03-06

Awad, Amr A. (Department: 2629)

Computer graphics processing and selective visual display system

Display peripheral interface input device

Touch panel

C178S018070

Reexamination Certificate

active

10414775

ABSTRACT:
A coordinate detection input system includes two first elongated electric conductors with an insulation grounding device respectively, a control circuit and two elongated electric conductors with another insulation grounding device respectively. The two elongated electric conductors are disposed correspond to X-coordinate and Y-coordinate of the input system. The control circuit further includes a microprocessor, a field induced voltage transducer, an analog/digital converter and a signal transmission device. The elongated electric conductors are electrically connected to the microprocessor to induce electromagnetic fields sequentially every time after a zero checking has been done by the microprocessor. The field induced voltage transducer induces voltage in the magnetic field once the pulse current is operated to pass through any one of the electric conductors. The analog/digital converter transforms the induced voltages as coordinates and position of the field induced voltage transducer can be figured out accordingly.

REFERENCES:
patent: 2241544 (1941-05-01), Dreyer, Jr.
patent: 2586160 (1952-02-01), Handel
patent: 3466391 (1969-09-01), Ellis
patent: 4081603 (1978-03-01), Davis et al.
patent: 4143240 (1979-03-01), Kobayashi et al.
patent: 4497977 (1985-02-01), Saito et al.
patent: 4710595 (1987-12-01), Kimura

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