Methods and systems for detecting a position-based attribute of an object using digital codes
First Claim
1. A controller for a position sensor, comprising:
- drive circuitry configured to;
simultaneously transmit a first signal with a first subset of a plurality of transmitter electrodes during a first time period; and
simultaneously transmit a second signal with a first transmitter electrode of the plurality of transmitter electrodes and a third signal with a second transmitter electrode of the plurality of transmitter electrodes during a second time period, wherein the second and third signals are distinct signals based on distinct digital codes; and
receiver circuitry configured to;
receive first electrical effects associated with the first signal with a plurality of receiver electrodes during the first time period; and
receive second electrical effects associated with the second and third signals with the plurality of receiver electrodes during the second time period.
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.
-
Citations
20 Claims
-
1. A controller for a position sensor, comprising:
-
drive circuitry configured to; simultaneously transmit a first signal with a first subset of a plurality of transmitter electrodes during a first time period; and simultaneously transmit a second signal with a first transmitter electrode of the plurality of transmitter electrodes and a third signal with a second transmitter electrode of the plurality of transmitter electrodes during a second time period, wherein the second and third signals are distinct signals based on distinct digital codes; and receiver circuitry configured to; receive first electrical effects associated with the first signal with a plurality of receiver electrodes during the first time period; and receive second electrical effects associated with the second and third signals with the plurality of receiver electrodes during the second time period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A method of capacitive sensing with a position sensor, said method comprising:
-
during a first time period, simultaneously transmitting a first signal with a first subset of a plurality of transmitter electrodes; and during a second time period, simultaneously transmitting a second signal with a first transmitter electrode of the plurality of transmitter electrodes and a third signal with a second transmitter electrode of the plurality of transmitter electrodes, wherein the second and third signals are based on different distinct digital codes. - View Dependent Claims (10, 11, 12, 13)
-
-
14. A position sensor comprising:
-
a plurality of transmitter electrodes; a plurality of receiver electrodes; and a controller coupled to the plurality of transmitter electrodes and the plurality of receiver electrodes, the controller configured to; simultaneously transmit a first signal with a first subset of the plurality of transmitter electrodes during a first time period; receive first electrical effects associated with the first signal with at least one receiver electrode of the plurality of receiver electrodes during the first time period; determine a first position-based attribute based on the first electrical effects; simultaneously transmit a second signal with a first transmitter electrode of the plurality of transmitter electrodes and a third signal with a second transmitter electrode of the plurality of transmitter electrodes during a second time period, wherein the second and third signals are distinct signals based on distinct digital codes; receive second electrical effects associated with the second and third signals with at least one receiver electrode of the plurality of receiver electrodes during the second time period; and determine a second position-based attribute based on the second electrical effects. - View Dependent Claims (15, 16, 17, 18, 19, 20)
-
Specification