Telegraphy – Systems – Position coordinate determination for writing
Patent
1987-10-21
1989-05-23
Schreyer, Stafford D.
Telegraphy
Systems
Position coordinate determination for writing
310311, 340706, 364521, G08C 2100
Patent
active
048332798
ABSTRACT:
A digital computer writing board making use of the piezoelectric characteristics by means of a soft piezoelectric film material to convert a physical pressure into an electrical signal, which is utilized to form fine electric polar lines of high resolution to be arranged into an upper layer and a lower layer quadraturally for sub-group encoding, then for reading out the positions of various signals which will be detected by a detection circuits and stored into a memory for processing by a computer and for displaying on the corresponding positions on the screen. The digital computer writing board is capable of having a common writing instrument (such as a pencil, ball pen . . . etc.) directly writing or drawing and having those character tracings or graphic patterns thus left to be processed digitally for storage in a memory for further processing, display, identification within the computer terminal or for the transmission as an electronic document and printing out, with a view to providing a solution to such problems as one in which a hand writing of characters or graphs is insusceptibly connected within an interface of the computer or communication link. This has been a revolutional contribution as means inputing some handwriting to the computers of next generation.
REFERENCES:
patent: 3808364 (1974-04-01), Veith
Chen Hsing
Juang Dar-Chang
Industrial Technology Research Institute
Schreyer Stafford D.
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