Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel
Patent
1995-04-26
1997-08-12
Hjerpe, Richard
Computer graphics processing and selective visual display system
Display peripheral interface input device
Touch panel
345179, 345173, 178 18, G09G 500
Patent
active
056570538
ABSTRACT:
A method for generating coordinate signals in conjunction with a surface of a field emission device having a cathode plate 2 coupled to an anode plate 32 comprises the steps of providing a first ultrasonic wave packet to the anode plate 32, receiving with a stylus 30 positioned proximate to the anode plate 32 the first ultrasonic wave packet, and then transmitting to the anode plate 32 with the stylus 30 a second ultrasonic wave packet responsive to the first ultrasonic wave packet. Next, receiving from the anode plate 32, with a plurality of piezoelectric point elements 44, the second ultrasonic wave packet, and then determining an x-position and y-position 35 of the stylus 30 responsive to the received second ultrasonic wave packet.
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Files Leigh Ann
Primm Charles E.
Taylor Robert H.
Chang Kent
Donaldson Richard L.
Hjerpe Richard
Keagy Rose Alyssa
Texas Instruments Incorporated
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