NOISE REDUCTION METHOD, TOUCH DISPLAY APPARATUS, AND COMPUTER-READABLE STORAGE MEDIUM

• US 20200133429A1
• Filed: 11/13/2019
• Published: 04/30/2020
• Est. Priority Date: 10/31/2018
• Status: Active Grant

• Current Assignee: Shenzhen Goodix Technology Co., Ltd.
• Original Assignee: Shenzhen Goodix Technology Co., Ltd.
• Inventors: CHEN, Xi
• Granted Patent: US 10,963,099 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 3/0418 for error correction or compensation, e.g. based on parallax, calibration or alignment
• CPC Class Codes: G06F 3/04182 Filtering of noise external to the device and not generated by digitiser components
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

Embodiments of the present disclosure provide a noise reduction method. The noise reduction method is applied to the touch display apparatus on which several touch detection nodes are disposed, and the noise reduction method includes: obtaining noise data of each touch detection node (101); obtaining characteristic values based on the noise data (102); performing fitting processing on noise data of a target node and the characteristic values, to obtain a fitting function in which the characteristic values are used as an independent variable and the noise data of the target node is used as a dependent variable (103), where a target node is a touch detection node to be noise reduced; substituting the characteristic values into the fitting function, to obtain fitting data corresponding to the characteristic values (104); and using differences between the fitting data and the noise data of the target node as noise reduced data (105).

Claims

1. A noise reduction method, wherein the noise reduction method is applied to a touch display apparatus, several touch detection nodes are disposed on the touch display apparatus, and the method comprises:

obtaining noise data of each touch detection node;

obtaining characteristic values based on the noise data;

performing fitting processing on noise data of a target node and the characteristic values, to obtain a fitting function in which the characteristic values are used as an independent variable and the noise data of the target node is used as a dependent variable, wherein the target node is a touch detection node to be noise reduced;

substituting the characteristic values into the fitting function, to obtain fitting data corresponding to the characteristic values; and

using differences between the fitting data and the noise data of the target node as noise reduced data.

2. The noise reduction method according to claim 1, wherein the obtaining noise data of each touch detection node comprises:

performing sampling on each touch detection node, to obtain sampling data of each touch detection node;

separately calculating a difference between the sampling data of each touch detection node and a datum reference value of each touch detection node; and

using the difference of each touch detection node as the noise data of each touch detection node.

3. The noise reduction method according to claim 2, wherein before obtaining characteristic values based on the noise data, the noise reduction method further comprises:

when there is a touch detection node meeting a preset condition, removing, from the noise data of each touch detection node, noise data of the touch detection node meeting the preset condition, wherein the preset condition is that noise data of a touch detection node is greater than a preset threshold.

4. The noise reduction method according to claim 1, wherein the obtaining noise data of each touch detection node is:

performing multiple sampling on each touch detection node, to obtain multiple sampling noise data; and

the obtaining characteristic values based on the noise data comprises;

selecting a plurality of touch detection nodes;

separately performing statistical processing on noise data that is obtained by performing multiple sampling on each selected touch detection node; and

obtaining the characteristic values based on a statistic result.

5. The noise reduction method according to claim 4, wherein the selecting a plurality of touch detection nodes is:

randomly selecting, from the touch detection nodes disposed on the touch display apparatus, a plurality of touch detection nodes, wherein the plurality of randomly-selected touch detection nodes have a same vertical coordinate and different horizontal coordinates, or the plurality of randomly-selected touch detection nodes have a same horizontal coordinate and different vertical coordinates.

6. The noise reduction method according to claim 4, wherein the separately performing statistical processing on noise data that is obtained by multiple performing sampling on each selected touch detection node includes:

separately performing statistical processing, based on the noise data that is obtained by performing multiple sampling on each selected touch detection node, to obtain a maximum value, a minimum value, or an average value of the noise data of each selected touch detection node; and

the obtaining the characteristic values based on a statistic result is;

using the maximum value, the minimum value, or the average value as the characteristic value.

7. The noise reduction method according to claim 4, wherein the separately performing statistical processing on noise data that is obtained by performing multiple sampling on each selected touch detection node includes:

separately performing statistical processing, based on the noise data that is obtained by performing multiple sampling on each selected touch detection node, to obtain a mode interval of the noise data of each selected touch detection node; and

the obtaining the characteristic values based on a statistic result is;

obtaining the characteristic values based on the mode interval.

8. The noise reduction method according to claim 1, wherein the target node refers to touch detection nodes to be noise reduced that have a same vertical axis coordinate and different horizontal axis coordinates, and the fitting function is a fitting function on a horizontal axis;

and

the obtaining characteristic values based on the noise data comprises;

extracting noise data of touch detection nodes having a same vertical axis coordinate and different horizontal axis coordinates, wherein the vertical axis coordinate of extracted touch detection nodes is different from that of the target node; and

using the extracted noise data of the touch detection nodes as the characteristic values.

9. The noise reduction method according to claim 1, wherein the target node refers to touch detection nodes to be noise reduced having a same horizontal axis coordinate and different vertical axis coordinates, and the fitting function is a fitting function on a vertical axis;

and

the obtaining characteristic values based on the noise data comprises;

extracting noise data of touch detection nodes having a same horizontal axis coordinate and different vertical axis coordinates, wherein the horizontal axis coordinate of extracted touch detection nodes is different from that of the target node; and

using the extracted noise data of the touch detection nodes as the characteristic values.

10. The noise reduction method according to claim 1, wherein the obtaining characteristic values based on the noise data comprises:

extracting noise data of first-type touch detection nodes having a same vertical axis coordinate and different horizontal axis coordinates, wherein the vertical axis coordinate of the first-type touch detection nodes is different from that of the target node;

using the extracted noise data of the first-type touch detection nodes as first-type characteristic values;

extracting noise data of second-type touch detection nodes having a same horizontal axis coordinate and different vertical axis coordinates, wherein the horizontal axis coordinate of the second-type touch detection nodes is different from that of the target node;

using the extracted noise data of the second-type touch detection nodes as second-type characteristic values; and

the performing fitting processing on noise data of a target node and the characteristic values, to obtain a fitting function in which the characteristic values are used as an independent variable and the noise data of the target node is used as a dependent variable comprises;

performing fitting processing on the first-type characteristic values and noise data of first reference target nodes, to obtain a first fitting subfunction, wherein the first reference target nodes are touch detection nodes located in a same row as the target node;

performing fitting processing on the second-type characteristic values and noise data of second reference target nodes, to obtain a second fitting subfunction, wherein the second reference target nodes are touch detection nodes located in a same column as the target node; and

superimposing the first fitting subfunction and the second fitting subfunction, to obtain the fitting function.

11. The noise reduction method according to claim 1, wherein a touch control layer of the touch display apparatus is integrated in a display panel.

12. The noise reduction method according to claim 2, wherein a touch control layer of the touch display apparatus is integrated in a display panel.

13. The noise reduction method according to claim 3, wherein a touch control layer of the touch display apparatus is integrated in a display panel.

14. The noise reduction method according to claim 4, wherein a touch control layer of the touch display apparatus is integrated in a display panel.

15. The noise reduction method according to claim 5, wherein a touch control layer of the touch display apparatus is integrated in a display panel.

16. The noise reduction method according to claim 6, wherein a touch control layer of the touch display apparatus is integrated in a display panel.

17. The noise reduction method according to claim 7, wherein a touch control layer of the touch display apparatus is integrated in a display panel.

18. A touch display apparatus, comprising:

at least one processor; and

a memory communicably connected with the at least one processor;

wherein the memory stores instructions executable by the at least one processor, and the instructions, when executed by the at least one processor, cause the at least one processor to perform a noise reduction method,

wherein the noise reduction method is applied to a touch display apparatus, several touch detection nodes are disposed on the touch display apparatus, and the noise reduction method comprises;

obtaining noise data of each touch detection node;

obtaining characteristic value based on the noise data;

performing fitting processing on noise data of a target node and the characteristic value, to obtain a fitting function in which the characteristic value are used as an independent variable and the noise data of the target node is used as a dependent variable, wherein the target node is a touch detection node to be noise reduced;

substituting the characteristic value into the fitting function, to obtain fitting data corresponding to the characteristic value; and

using differences between the fitting data and the noise data of the target node as noise reduced data.

19. The touch display apparatus according to claim 18, wherein the obtaining noise data of each touch detection node comprises:

performing sampling on each touch detection node, to obtain sampling data of each touch detection node;

separately calculating a difference between the sampling data of each touch detection node and a datum reference value of each touch detection node; and

using the difference of each touch detection node as the noise data of each touch detection node.

20. A computer-readable storage medium, storing a computer program, wherein the computer program, when executed by a processor, implements a noise reduction method, wherein the noise reduction method is applied to a touch display apparatus, several touch detection nodes are disposed on the touch display apparatus, and the noise reduction method comprises:

obtaining noise data of each touch detection node;

obtaining characteristic value based on the noise data;

performing fitting processing on noise data of a target node and the characteristic value, to obtain a fitting function in which the characteristic value are used as an independent variable and the noise data of the target node is used as a dependent variable, wherein the target node is a touch detection node to be noise reduced;

substituting the characteristic value into the fitting function, to obtain fitting data corresponding to the characteristic value; and

using differences between the fitting data and the noise data of the target node as noise reduced data.