Dynamic assignment of possible channels in a touch sensor
First Claim
1. A method for reducing the effect of noise in a sensing device having at least one first conductor and a plurality of second conductors, wherein the sensing device senses events through processing signals present on the plurality of second conductors, the method comprising:
- determining a first signal space in which to generate at least a first plurality of signals for use in the sensing device;
identifying event signals and noise at the same time by;
generating the first plurality of signals for use in the sensing device in the first signal space, each of the first plurality of signals being generated on at least the first conductor;
sensing at least one signal on at least one of the plurality of second conductors, the sensing taking place at least in part simultaneously with the generating;
identifying signals and noise in the first signal space based upon the sensed at least one signal;
thenavoiding the noise by;
replacing the first signal space with a second signal space in which to generate a second plurality of signals for use in the sensing device, the second signal space mitigating the noise identified during the identifying signals and noise step;
thengenerating the second plurality of signals for use in the sensing device in the second signal space; and
,sensing at least some of the second plurality of signals to identify an event in the sensing device.
0 Assignments
0 Petitions
Accused Products
Abstract
Methods are disclosed for dynamic assignment of possible channels in a touch sensitive device having rows and columns. In an embodiment, a method determines a first signal space in which to generate signals for use in the touch sensor. Signals are then generated in the first signal space on separate ones of the rows and a column signal is sensed on a column. The first signal space is replaced with a second signal space, and a second plurality of signals is generated for use in the touch sensor in the second frequency space. The second plurality of signals is sensed to identify a touch event in the touch sensitive device.
-
Citations
17 Claims
-
1. A method for reducing the effect of noise in a sensing device having at least one first conductor and a plurality of second conductors, wherein the sensing device senses events through processing signals present on the plurality of second conductors, the method comprising:
-
determining a first signal space in which to generate at least a first plurality of signals for use in the sensing device; identifying event signals and noise at the same time by; generating the first plurality of signals for use in the sensing device in the first signal space, each of the first plurality of signals being generated on at least the first conductor; sensing at least one signal on at least one of the plurality of second conductors, the sensing taking place at least in part simultaneously with the generating; identifying signals and noise in the first signal space based upon the sensed at least one signal;
thenavoiding the noise by; replacing the first signal space with a second signal space in which to generate a second plurality of signals for use in the sensing device, the second signal space mitigating the noise identified during the identifying signals and noise step;
thengenerating the second plurality of signals for use in the sensing device in the second signal space; and
,sensing at least some of the second plurality of signals to identify an event in the sensing device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A device comprising:
-
a first conductor; a plurality of second conductors; a signal generator adapted to generate a plurality of unique orthogonal signals within a signal space on at least the first conductor, each unique orthogonal signal being orthogonal to each of the other unique orthogonal signals; receiver associated with the second plurality of conductors, the receiver being adapted to receive signals present on each of the second plurality of conductors while the signal generator is generating the plurality of unique orthogonal signals; signal processor adapted to decode the signals received by the receiver, and for each of the signals received by the receiver to determine an amount of each of the unique orthogonal signals contained therein; the signal processor being further adapted to identify first electromagnetic interference frequency in the signals received by the receiver at the same time as event signals, and adapted to revise the signal space to mitigate collision with the first electromagnetic interference frequency. - View Dependent Claims (14, 15, 16)
-
-
17. A method for reducing the effect of noise in a device having a plurality of first conductors and a second conductor, wherein the device senses events through processing signals present on the second conductor, comprising:
-
determining a first signal-to-conductor map with which to generate a first plurality of signals for use in a device; identifying signals and noise at the same time by; generating the first plurality of signals for use in the device using the first signal-to-conductor map, each of the first plurality of signals being generated on separate ones of the plurality of first conductors; sensing received signals on the second conductor, the sensing taking place at least in part simultaneously with the generating; identifying signals and noise in the received signals;
thenavoiding the noise by; replacing the first signal-to-conductor map with a second signal-to-conductor map with which to generate a second plurality of signals for use in the device, the second signal-to-conductor map mitigating the noise identified during the identifying signals and noise step;
thengenerating the second plurality of signals for use in the device using the second signal-to-conductor map; and
,sensing at least some of the second plurality of signals to identify an event.
-
Specification