Stylus for operating a digitizer system
First Claim
1. A handheld device comprising:
- a conductive tip configured to interact with a capacitive based digitizer sensor;
an active transmission module comprising a first circuit that generates a first signal on the conductive tip independent from a drive signal transmitted on the digitizer sensor;
a reflective transmission module configured to generate a second signal on the conductive tip based on the drive signal transmitted on the digitizer sensor over a pre-defined duration and picked by the conductive tip during interaction with the digitizer sensor, wherein the reflective transmission module comprises;
a second circuit comprising;
an amplifier configured to convert charge on the conductive tip to voltage; and
a signal detector configured to receive amplifier output and to extract parameters of the output;
a third circuit comprising;
a signal generator configured to generate a signal based on the parameters extracted; and
a booster configured to boost the signal generated with an amplitude based on the parameters extracted to be transmitted via the conductive tip;
a reflective transmission module switch configured to connect one of the second circuit and the third circuit to the conductive tip; and
a reflective transmission module controller configured to toggle position of the reflective transmission module switch a plurality of times during the pre-defined duration;
a switch configured to connect the conductive tip to one of the active transmission module and the reflective transmission module; and
controller configured to toggle position of the switch.
1 Assignment
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Accused Products
Abstract
A handheld device includes a conductive tip configured to interact with a capacitive based digitizer sensor, an active transmission module, a reflective transmission module, a switch configured to connect the conductive tip to one of the active transmission module and the reflective transmission module and a controller configured to toggle position of the switch. The active transmission module configured to generate a first signal on the conductive tip independent from a drive signal transmitted on the digitizer sensor. The reflective transmission module is configured to generate a second signal on the conductive tip based on the drive signal transmitted on the digitizer sensor and picked by the conductive tip during interaction with the digitizer sensor.
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Citations
13 Claims
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1. A handheld device comprising:
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a conductive tip configured to interact with a capacitive based digitizer sensor; an active transmission module comprising a first circuit that generates a first signal on the conductive tip independent from a drive signal transmitted on the digitizer sensor; a reflective transmission module configured to generate a second signal on the conductive tip based on the drive signal transmitted on the digitizer sensor over a pre-defined duration and picked by the conductive tip during interaction with the digitizer sensor, wherein the reflective transmission module comprises; a second circuit comprising; an amplifier configured to convert charge on the conductive tip to voltage; and a signal detector configured to receive amplifier output and to extract parameters of the output; a third circuit comprising; a signal generator configured to generate a signal based on the parameters extracted; and a booster configured to boost the signal generated with an amplitude based on the parameters extracted to be transmitted via the conductive tip; a reflective transmission module switch configured to connect one of the second circuit and the third circuit to the conductive tip; and a reflective transmission module controller configured to toggle position of the reflective transmission module switch a plurality of times during the pre-defined duration; a switch configured to connect the conductive tip to one of the active transmission module and the reflective transmission module; and controller configured to toggle position of the switch. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification