Graphics pen for soft displays

Details Graphics pen for soft displays Graphics pen for soft displays

1980-05-19

1982-03-02

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

178 18, 340707, 340710, G09G 100

Patent

active

043180965

ABSTRACT:
A graphics input device for use with location indicating means to present graphic data upon a computer controlled visual display. The device includes a pen having a housing within which is disposed a conductive stylus shaft, one end extending beyond the housing to serve as the writing tip. A cylindrical off-axis pressure transducer encircles a portion of the stylus shaft within the housing, adjacent its writing end, for generating a variable output electrical signal proportional to the variable off-axis force applied to the stylus independently of the rotational orientation of the pen. A display processing and control system receives the variable signals and modifies a visual characteristic of the graphic data in response thereto.

REFERENCES:
patent: 3535447 (1970-10-01), Wollrich
patent: 3846826 (1974-11-01), Mueller
patent: 3932862 (1976-01-01), Graven
patent: 4091234 (1978-05-01), Bristow
patent: 4156911 (1979-05-01), Crane et al.

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