Touch panel with discontinuities in touch sensitive surface

Details Touch panel with discontinuities in touch sensitive surface Touch panel with discontinuities in touch sensitive surface

1986-11-10

1988-02-16

Schreyer, Stafford D.

Telegraphy

Systems

Position coordinate determination for writing

G08C 2100

Patent

active

047256958

ABSTRACT:
In accordance with the invention, a touch panel includes an electrically conductive film of a first resistivity which extends over a first area of a base plate. Regions of a resistivity higher than the first resistivity, such as discontinuities in the film, are positioned in this first area. These discontinuities are located so as to enhance the uniformity of an electric field which is established in a touch sensing portion of the film.

REFERENCES:
patent: 3801733 (1974-04-01), Bailey
patent: 4055726 (1977-10-01), Turner et al.
patent: 4186392 (1980-01-01), Holz
patent: 4198539 (1980-04-01), Pepper, Jr.
patent: 4214122 (1980-07-01), Kley
patent: 4353552 (1982-10-01), Pepper, Jr.
patent: 4442317 (1984-04-01), Jandrell
patent: 4476463 (1984-10-01), Ng et al.
patent: 4622437 (1986-11-01), Bloom et al.
patent: 4625075 (1986-11-01), Jaeger
Panttaja, E., "Touch Screens Let Your Fingers Provide a Fast, Simple Entry into the Computer," Electronics, Apr. 19, 1984, pp. 140-144.

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