Active stylus for touch sensing applications
AssigneeLogitech Europe S.A.
InventorMaxim VLASOV
Life of this patent
Estimating the term…
Abstract
Embodiments relate generally to control devices, such as human interface devices, configured for use with a touch-screen containing device. More specifically, the present invention relates to methods and various apparatus that are used to actively control the interaction of a handheld device, such as a stylus pen, with a touch-screen containing device. Embodiments of the invention provide a universal handheld device that is able to provide input to any type of capacitive sensing touch-screen containing device, regardless of the manufacturer or, in some embodiments, without knowledge of the touch-screen containing device manufacturer's specific capacitive touch-sensing detection techniques.
Claims25
A stylus adapted for use with a touch sensing device, comprising:
- a conductive tip;
- a peak signal detector electrically coupled to the conductive tip;
- a phase discriminator electrically coupled to the conductive tip;
- and
- a controller configured to receive a signal from the peak signal detector and a signal from the phase discriminator, wherein the signals from the peak detector and the phase discriminator are based on a capacitive sensing signal generated by a touch sensing device.
(canceled)
A stylus adapted for use with a touch sensing device, comprising:
- a conductive tip;
- a phase discriminator electrically coupled to the conductive tip, and configured to generate a phase detection signal that is derived from a capacitive sensing signal generated by the touch sensing device;
- a waveform generator;
- a controller configured to deliver a generator controlling signal to the waveform generator, wherein the generator controlling signal is derived from the phase detection signal;
- and
- a power amplifier coupled to the waveform generator and configured to deliver a capacitive sensing control signal to the conductive tip, wherein the capacitive sensing control signal is derived from the generator controlling signal.
(canceled)
-57. (canceled)
A stylus adapted for use with a touch sensing device, comprising:
- a conductive tip;
- a memory unit configured to store a first data set, wherein the first data set comprises information relating to a capacitive sensing process that is performed by at least one type of touch sensing device;
- a controller configured to compare capacitive sensing signal data received from a touch sensing device with the first data set;
- and
- a generator assembly configured to deliver a capacitive sensing controlling signal to the conductive tip, wherein the capacitive sensing controlling signal is derived from the comparison of the received capacitive sensing signal data and the first data set performed by the controller.
(canceled)
-91. (canceled)
Dependencies are inferred from the claim text.