Data input system including a keyboard having no moving parts

Details Data input system including a keyboard having no moving parts Data input system including a keyboard having no moving parts

1985-12-23

1987-10-20

Caldwell, Sr., John W.

Communications: electrical

Audible indication

Percussion-type sound producer

340365S, 250221, H03K 17969

Patent

active

047017473

ABSTRACT:
A data entry system includes a keyboard which includes a panel of chemically toughened, laminated glass. The upper surface of the panel has a plurality of key areas respectively representative of different keys, and a plurality of LEDs are respectively positioned opposite the key areas adjacent the lower surface of the panel. Each LED has a photodiode associated therewith, each photodiode being arranged to receive infra-red light emitted by the associated LED, transmitted through the glass panel and reflected back from an operator's finger placed on the respective key area to operate that key. Output signals are produced in response to infra-red light reflected back to the photodiodes, and, in response to these signals, a microprocessor produces an output indicative of an operated key. The data entry system is suitable for use in a through-the-wall automated teller machine.

REFERENCES:
patent: 3372789 (1968-03-01), Thiele et al.
patent: 3617627 (1971-11-01), McLean
patent: 3717870 (1973-02-01), Mathews et al.
patent: 3860754 (1975-01-01), Johnson et al.
patent: 3868681 (1975-02-01), Ohyama et al.
patent: 4017848 (1977-04-01), Tannas
patent: 4198623 (1980-04-01), Misek et al.
patent: 4254333 (1981-03-01), Bergstrom
patent: 4543564 (1985-09-01), Audoin et al.
patent: 4629884 (1986-12-01), Bergstrom
E. G. Uberbacher, "Fiber Optic Illuminated Switch", IBM Technical Disclosure Bulletin, vol. 18, No. 2, Jul. 1975.
W. L. Holloway, "Elimination of False Data Caused by Switch Bounce of a Switch-Contact Keyboard", IBM Technical Disclosure Bulletin, vol. 27, No. 5, Oct. 1984.

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