Computer graphics processing and selective visual display system – Display peripheral interface input device – Stylus
Reexamination Certificate
2006-12-28
2011-10-18
Lao, Lun-Yi (Department: 2629)
Computer graphics processing and selective visual display system
Display peripheral interface input device
Stylus
C178S019010
Reexamination Certificate
active
08040330
ABSTRACT:
An untethered stylus is configured to cooperate with a location sensing device that generates a drive signal. The stylus includes transceiver circuitry disposed in a housing, which is configured to receive the drive signal and transmit a stylus signal for reception by the location sensor. Energy circuitry is disposed in the housing and energized by the drive signal. A reference frequency generator, disposed in the housing and coupled to the transceiver circuitry and energy circuitry, is configured to generate a number of reference frequencies based on a source frequency of the drive signal, the reference frequencies indicative of a number of stylus states and synchronized to the source frequency of the drive signal. The transceiver circuitry is configured to mix the reference frequencies with the stylus signal.
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3M Innovative Properties Company
Bern Steven A.
Lao Lun-Yi
Suteerawongsa Jarurat
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