Cathode ray tube for use in a touch panel display system

Details Cathode ray tube for use in a touch panel display system Cathode ray tube for use in a touch panel display system

1985-06-06

1988-05-24

Caldwell, Sr., John W.

Communications: electrical

Land vehicle alarms or indicators

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

340365A, 178 18, 333153, G09G 100

Patent

active

047469145

ABSTRACT:
A cathode ray tube for use in a touch panel system that is capable of recognizing touch positions along a coordinate axis of a touch display surface of the system has a flat glass faceplate capable of propegating surface acoustic waves. An input surface wave transducer, acoustically coupled to the touch display surface, serves to launch a burst of surface waves on that surface. At least one array of wave reflective elements are disposed in or on the touch display surface for directing the surface waves derived from the input trasnducer across the touch display surface.

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G. W. Judd and J. L. Thoss--"Use of Apodized Metal Gratings in Fabricating Low Cost Quartz RAC Filters"--IEEE 1980 Ultrasonics Symposium, p. 343.
J. Fajans--"Acoustical Touch Panel"--IBM Technical Disclosure Bulletin--vol. 26, No. 7, Dec. 1977--p. 2925.

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