METHODS AND SYSTEMS FOR DETECTING A POSITION-BASED ATTRIBUTE OF AN OBJECT USING DIGITAL CODES
First Claim
1. A controller for a position sensor, wherein the controller comprises:
- drive circuitry configured to simultaneously transmit a first signal with a first transmitter electrode and a second signal with a second transmitter electrode, where the first and second signals are distinct signals based on distinct digital codes; and
receiver circuitry configured to receive electrical effects with at least one receiver electrode, wherein the electrical effects are associated with the first and second signals, wherein the controller is configured to determine a position-based attribute of at least one input object based on the electrical effects.
3 Assignments
0 Petitions
Accused Products
Abstract
Methods, systems and devices are described for detecting a position-based attribute of a finger, stylus or other object with a touchpad or other sensor having a touch-sensitive region that includes a plurality of electrodes. Modulation signals for one or more electrodes are produced as a function of any number of distinct digital codes. The modulation signals are applied to an associated at least one of the plurality of electrodes to obtain a resultant signal that is electrically affected by the position of the object. The resultant signal is demodulated using the plurality of distinct digital codes to discriminate electrical effects produced by the object. The position-based attribute of the object is then determined with respect to the plurality of electrodes from the electrical effects.
84 Citations
23 Claims
-
1. A controller for a position sensor, wherein the controller comprises:
-
drive circuitry configured to simultaneously transmit a first signal with a first transmitter electrode and a second signal with a second transmitter electrode, where the first and second signals are distinct signals based on distinct digital codes; and receiver circuitry configured to receive electrical effects with at least one receiver electrode, wherein the electrical effects are associated with the first and second signals, wherein the controller is configured to determine a position-based attribute of at least one input object based on the electrical effects. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A position sensor comprising:
-
a plurality of transmitter electrodes disposed in a first direction; a plurality of receiver electrodes disposed in a second direction, where the first direction is substantially orthogonal to the second direction; and a controller coupled to the plurality of transmitter electrodes and to the plurality of receiver electrodes, the controller configured to; simultaneously transmit a first signal with a first transmitter electrode of the plurality of transmitter electrodes and a second signal with a second transmitter electrode of the plurality of transmitter electrodes, wherein the first and second signals are distinct signals based on distinct digital codes; receive electrical effects associated with the first and second signals with at least one receiver electrode of the plurality of receiver electrodes; and determine a position-based attribute of at least one input object based on the electrical effects. - View Dependent Claims (15, 16, 17, 18)
-
-
19. A method of capacitive sensing with a position sensor, said method comprises:
-
simultaneously transmitting a first signal with a first transmitter electrode and a second signal with a second transmitter electrode, where the first and second signals are distinct signals based on distinct digital codes; receiving electrical effects with at least one receiver electrode, wherein the electrical effects are associated with the first and second signals; and determining a position-based attribute of at least one input object based on the electrical effects. - View Dependent Claims (20, 21, 22, 23)
-
Specification