Dynamic control of shield electrode connection of a stylus
First Claim
1. An elongated stylus configured to be capacitively coupled with a sensor array that provides a plurality of electrodes and is controlled by a sensor controller, to indicate a position on the sensor array, the stylus comprising:
- a housing having an end in an elongated direction of the housing;
a conductive tip disposed at least partially extended from the end of the housing;
a shield disposed around the conductive tip and at least partially exposing the conductive tip;
a signal transmit drive circuit configured to transmit a stylus signal to the sensor array; and
a stylus controller configured to control transmission of the stylus signal to the sensor array;
wherein the stylus controller, in operation, synchronizes transmission of the stylus signal to the sensor array via the conductive tip with a sensor signal transmitted from the sensor controller and electrically connects the shield disposed around the conductive tip to a ground electrically isolating the shield from the conductive tip while the stylus signal is transmitted to the sensor array.
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Accused Products
Abstract
An elongated stylus is configured to be capacitively coupled with a sensor array providing a plurality of electrodes to indicate a position on the sensor array. The stylus includes a housing having an end in an elongated direction of the housing, a conductive tip disposed at least partially extended from the end of the housing, an electrode disposed around the conductive tip and configured to at least partially expose the conductive tip, and a signal transmit drive circuit configured to provide a signal. Control is performed to form an electrical connection between the electrode and a ground and an electrical connection between the electrode and the signal transmit drive circuit when the elongated stylus is activated for capacitive coupling with the sensor array.
56 Citations
15 Claims
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1. An elongated stylus configured to be capacitively coupled with a sensor array that provides a plurality of electrodes and is controlled by a sensor controller, to indicate a position on the sensor array, the stylus comprising:
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a housing having an end in an elongated direction of the housing; a conductive tip disposed at least partially extended from the end of the housing; a shield disposed around the conductive tip and at least partially exposing the conductive tip; a signal transmit drive circuit configured to transmit a stylus signal to the sensor array; and a stylus controller configured to control transmission of the stylus signal to the sensor array; wherein the stylus controller, in operation, synchronizes transmission of the stylus signal to the sensor array via the conductive tip with a sensor signal transmitted from the sensor controller and electrically connects the shield disposed around the conductive tip to a ground electrically isolating the shield from the conductive tip while the stylus signal is transmitted to the sensor array. - View Dependent Claims (2, 3, 4, 5)
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6. An elongated stylus configured to be capacitively coupled with a sensor array that provides a plurality of electrodes and is controlled by a sensor controller, to indicate a position on the sensor array, the stylus comprising:
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a housing having an end in an elongated direction of the housing; a conductive tip disposed at least partially extended from the end of the housing; a shield disposed around the conductive tip and at least partially exposing the conductive tip; a signal transmit drive circuit configured to transmit a stylus signal to the sensor array; and a stylus controller configured to control transmission of the stylus signal to the sensor array; wherein the stylus controller, in operation, synchronizes transmission of the stylus signal to the sensor array via the conductive tip with a sensor signal transmitted from the sensor controller and electrically isolates the shield disposed around the conductive tip to which the signal from the signal transmit drive circuit is supplied by electrically connecting the shield disposed around the conductive tip to a ground while the stylus signal is transmitted to the sensor array. - View Dependent Claims (7, 8, 9, 10)
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11. An elongated stylus configured to be capacitively coupled with a sensor array that provides a plurality of electrodes and is controlled by a sensor controller, to indicate a position on the sensor array, the stylus comprising:
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a housing having an end in an elongated direction of the housing; a conductive tip disposed at least partially extended from the end of the housing; a shield disposed around the conductive tip and at least partially exposing the conductive tip; a signal transmit drive circuit configured to transmit a stylus signal to the sensor array; and a stylus controller configured to control transmission of the stylus signal to the sensor array; wherein the stylus controller, in operation, synchronizes transmission of the stylus signal to the sensor array via the conductive tip with a sensor signal transmitted from the sensor controller and selectively performs a first control in which the signal from the transmit drive circuit is not supplied to the shield while the signal from the transmit drive circuit is supplied to the conductive tip and a second control in which the signal from the transmit drive signal is supplied to at least the shield. - View Dependent Claims (12, 13)
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14. An elongated stylus configured to be capacitively coupled with a sensor array that provides a plurality of electrodes to indicate a position on the sensor array, the stylus comprising:
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a housing having an end in an elongated direction of the housing; a conductive tip disposed at least partially extended from the end of the housing; a shield disposed around the conductive tip and at least partially exposing the conductive tip; a signal transmit drive circuit configured to transmit a stylus signal to the sensor array; and a stylus controller configured to control transmission of the stylus signal to the sensor array; wherein the stylus controller, in operation, synchronizes transmission of the stylus signal to the sensor array via the conductive tip with a sensor signal transmitted from the sensor controller and performs control of the shield in which the shield is electrically connected to a ground electrically isolating the shield from the conductive tip while the stylus signal is transmitted to the sensor array. - View Dependent Claims (15)
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Specification