Surface and cordless transducer system
First Claim
1. A surface and cordless transducer system, the system comprising:
- a surface including a position resolving grid, anda transducer including a power receiving circuit, wherein the power receiving circuit responds to an electromagnetic field radiating from the surface and sends a transmit signal, which is received by the position resolving grid and used to determine a position of the transducer relative to the surface,wherein the surface further includes a plurality of power transmission coils, which are distinct from the position resolving grid, for radiating the electromagnetic field, the plurality of power transmission coils being overlapping resonant power transmission coils that are configured to generate current multiplication associated with resonance therein, and are further configured to supply power and data to the transducer.
2 Assignments
0 Petitions
Accused Products
Abstract
A smart surface is disclosed that can stand alone or be contained within a portable computer or other system, for powering and communicating with single or multiple cord-free transducers. Operating or charging power is transmitted by the surface using a carrier signal that is on/off keyed or amplitude modulated with synchronization, clock, enable, address, modes, commands and other pulse width, encoded or digital data. The signal is transmitted to single or multiple cordless smart transducers located on or above the surface, such as pens with multiple pressure sensing and switch capability, pointers, stylus, cursors, pucks, mouse, pawns, implements and similar items. Overlapping resonant inductive circuits are used in the surface to transmit operating power and communicate data to the transducer(s).
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Citations
20 Claims
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1. A surface and cordless transducer system, the system comprising:
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a surface including a position resolving grid, and a transducer including a power receiving circuit, wherein the power receiving circuit responds to an electromagnetic field radiating from the surface and sends a transmit signal, which is received by the position resolving grid and used to determine a position of the transducer relative to the surface, wherein the surface further includes a plurality of power transmission coils, which are distinct from the position resolving grid, for radiating the electromagnetic field, the plurality of power transmission coils being overlapping resonant power transmission coils that are configured to generate current multiplication associated with resonance therein, and are further configured to supply power and data to the transducer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for determining a position of a transducer relative to a surface, wherein the surface includes a position resolving grid and the transducer includes a power receiving circuit, the method comprising:
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causing the power receiving circuit to respond to an electromagnetic field radiating from the surface and to send a transmit signal, and causing the position resolving grid to receive the transmit signal from the transducer to thereby determine a position of the transducer relative to the surface, wherein the surface further includes a plurality of power transmission coils, which are distinct from the position resolving grid and which are overlapping resonant power transmission coils that are configured to generate current multiplication associated with resonance therein, and the method further comprises; causing the plurality of overlapping resonant power transmission coils to radiate the electromagnetic field to thereby supply power and data to the transducer. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification