NOISE REDUCTION METHOD AND SYSTEM FOR TOUCH DETECTION DEVICE
First Claim
1. A noise reduction method for a touch detection device, wherein touch detection nodes of the touch detection device are divided into one or more groups and the noise reduction method comprises:
- step A, performing a synchronous sampling on the touch detection nodes in one same group and storing the sampling data;
step B, comparing each sampling data against a corresponding reference data to calculate a differential data which, as a detection data, replaces a corresponding original sampling data;
step C, calculating statistics of the replacing detection data obtained at step B to screen out, according to a predetermined screening condition, valid data to calculate a DC offset component indicative of a noise ingredient; and
step D, obtaining noise-filtered detection data by subtracting the DC offset component obtained at step C from each detection data obtained at step B.
3 Assignments
0 Petitions
Accused Products
Abstract
Noise reduction method and system for a touch detection device are disclosed. The noise reduction method includes: step A, performing a synchronous sampling on the touch detection nodes in one same group and storing the sampling data; step B, comparing each sampling data against a corresponding reference data to calculate a differential data which, as a detection data, replaces a corresponding original sampling data; step C, calculating statistics of the replacing detection data to screen out valid data to calculate a DC offset component indicative of a noise ingredient; and step D, obtaining noise-filtered detection data by subtracting the DC offset component from each detection data.
-
Citations
12 Claims
-
1. A noise reduction method for a touch detection device, wherein touch detection nodes of the touch detection device are divided into one or more groups and the noise reduction method comprises:
-
step A, performing a synchronous sampling on the touch detection nodes in one same group and storing the sampling data; step B, comparing each sampling data against a corresponding reference data to calculate a differential data which, as a detection data, replaces a corresponding original sampling data; step C, calculating statistics of the replacing detection data obtained at step B to screen out, according to a predetermined screening condition, valid data to calculate a DC offset component indicative of a noise ingredient; and step D, obtaining noise-filtered detection data by subtracting the DC offset component obtained at step C from each detection data obtained at step B. - View Dependent Claims (2, 3, 4)
-
-
5. A noise reduction system for a touch detection device, touch detection nodes of the touch detection device being divided into one or more groups, the noise reduction system comprising:
-
a sampling unit configured to perform a synchronous sampling on the touch detection nodes belonging to the same group and store the sampling data; a differential value calculating unit configured to compare each sampling data against a corresponding reference data to calculate a differential data to replace a corresponding original sampling data; a noise calculating unit configured to calculate statistics of the replacing detection data obtained by the differential value calculating unit to screen out, according to a predetermined screening condition, valid data to calculate a DC offset component indicative of a noise ingredient; and a noise filtering unit configured to obtain noise-filtered detection data by subtracting the DC offset component obtained by the noise calculating unit from each detection data calculated by the differential value calculating unit. - View Dependent Claims (6, 7, 8)
-
-
9. A touch terminal comprising a touch detection device, the touch detection device comprising:
-
a touch sensor unit; and a touch controller unit coupled to the touch sensor unit, wherein the touch controller unit comprises a noise reduction system, touch detection nodes of the touch detection device being divided into one or more groups, the noise reduction system comprising; a sampling unit configured to perform a synchronous sampling on the touch detection nodes belonging to the same group and store the sampling data; a differential value calculating unit configured to compare each sampling data against a corresponding reference data to calculate a differential data to replace a corresponding original sampling data; a noise calculating unit configured to calculate statistics of the replacing detection data obtained by the differential value calculating unit to screen out, according to a predetermined screening condition, valid data to calculate a DC offset component indicative of a noise ingredient; and a noise filtering unit configured to obtain noise-filtered detection data by subtracting the DC offset component obtained by the noise calculating unit from each detection data calculated by the differential value calculating unit. - View Dependent Claims (10, 11, 12)
-
Specification