Noise scanning method, noise scanning device and touch panel

Patent metadata

Field	Value
Publication number	US-9886133-B2
Application number	US-201515101338-A
Country	US
Kind code	B2
Filing date	Oct 9, 2015
Priority date	May 15, 2015
Publication date	Feb 6, 2018
Grant date	Feb 6, 2018

Abstract

The present disclosure provides a noise scanning method, a noise scanning device and a touch panel. The noise scanning method includes steps of performing a touch scanning operation on the touch panel, performing a noise scanning operation on the plurality of touch driving lines Tx or the plurality of touch sensing lines Rx while performing the touch scanning operation, and acquiring a position of each touch unit on the touch panel in accordance with a result of the touch scanning operation and a result of the noise scanning operation.

First claim

What is claimed is:

1. A noise scanning method for a touch display device, the touch display device comprising a touch panel, the touch panel comprising a plurality of touch units arranged in an array form, a plurality of touch driving lines Tx arranged in an array form, and a plurality of touch sensing lines Rx arranged in an array form, each touch driving line Tx being arranged perpendicular to each touch sensing line Rx, the noise scanning method comprising steps of:
performing a touch scanning operation on the touch panel;
performing a noise scanning operation on the plurality of touch driving lines Tx or the plurality of touch sensing lines Rx while performing the touch scanning operation; and
acquiring a position of each touch unit on the touch panel in accordance with a result of the touch scanning operation and a result of the noise scanning operation,
wherein each touch driving line Tx corresponds to the touch units in a row, each touch sensing line Rx corresponds to the touch units in a column, and each touch driving line Tx is coupled to the touch sensing lines Rx, and
wherein the step of performing the touch scanning operation on the touch panel comprises:
inputting a first scanning signal to a first touch driving line Tx, the first touch driving line Tx being any one of the plurality of touch driving lines Tx; and
acquiring a second scanning signal generated on a first touch sensing line Rx in accordance with the first scanning signal on the first touch driving line Tx, the first touch sensing line Rx being any one of the plurality of touch sensing lines Rx,
wherein the step of performing the noise scanning operation on the plurality of touch driving lines Tx comprises:
in response to the first scanning signal inputted to the first touch driving line Tx, performing the noise scanning operation on the first touch driving line Tx, so as to acquire a noise of the first scanning signal, and
subsequent to the step of performing the noise scanning operation on the plurality of touch driving lines Tx, the noise scanning method further comprises performing an additional noise scanning operation on the touch panel so as to acquire the other noise,
wherein the touch display device is provided with a predetermined characteristic value of a Tx reference signal,
the noise scanning method further comprises, in response to the first scanning signal inputted to the first touch driving line Tx, inputting the Tx reference signal to a second touch driving line Tx adjacent to the first touch driving line Tx, and
the step of performing the noise scanning operation on the first touch driving line Tx so as to acquire the noise of the first scanning signal comprises acquiring a characteristic value of a signal on the second touch driving line Tx, calculating a difference between the characteristic value of the signal on the second touch driving line Tx and the characteristic value of the Tx reference signal, and taking the difference as the noise of the first scanning signal.

2. The noise scanning method according to claim 1 , wherein the step of acquiring the position of each touch unit on the touch panel in accordance with the result of the touch scanning operation and the result of the noise scanning operation comprises:
subjecting the second scanning signal to first noise treatment in accordance with the noise of the first scanning signal, so as to acquire the second scanning signal after the first noise treatment;
subjecting the second scanning signal after the first noise treatment to second noise treatment in accordance with the other noise, so as to acquire the second scanning signal after the second noise treatment; and
acquiring a position of a first touch unit in accordance with the first scanning signal and the second scanning signal after the second noise treatment, the first touch unit corresponding to the first touch driving line Tx and the first touch sensing line Rx.

3. The noise scanning method according to claim 1 , wherein the step of performing the noise operation on the plurality of touch sensing lines Rx comprises, in response to the acquisition of the second scanning signal, performing the noise scanning operation on the first touch sensing line Rx, so as to acquire a noise of the second scanning signal.

4. The noise scanning method according to claim 3 , wherein the touch panel is provided with a display region and a non-display region and comprises a substrate, a reference electrode group is arranged in one column on the substrate at a position corresponding to the non-display region and parallel to the touch sensing lines Rx, a plurality of additional touch driving lines Tx is arranged transversely on the substrate at positions corresponding to the reference electrode group, and the plurality of touch driving lines Tx is connected to the respective additional touch driving lines Tx and divided into n Tx groups, where n is an integer greater than 1;
the reference electrode group comprises n reference electrodes, each reference electrode is coupled to corresponding additional touch driving lines Tx, the n Tx groups each correspond to the respective reference electrode, a first Tx group comprises the first touch driving line Tx corresponding to a first additional touch driving line Tx, a second Tx group is arranged adjacent to the first Tx group and corresponds to a second reference electrode, and the touch display device is provided with a predetermined characteristic value of a Rx reference signal;
the noise scanning method further comprises, in response to the first scanning signal inputted to the first touch driving line Tx, inputting the Tx reference signal to any one of the touch driving lines Tx in the second Tx group; and
the step of performing the noise scanning operation on the first touch sensing line Rx so as to acquire the noise of the second scanning signal comprises acquiring a signal on the second reference electrode, wherein the signal on the second reference electrode is generated in accordance with the Tx reference signal and is the noise of the second scanning signal.

5. The noise scanning method according to claim 4 , wherein the step of acquiring the position of each touch unit on the touch panel in accordance with the result of the touch scanning operation and the result of the noise scanning operation comprises:
subjecting the second scanning signal to noise treatment in accordance with the noise of the second scanning signal, so as to acquire the second scanning signal after the noise treatment; and
acquiring a position of a first touch unit in accordance with the first scanning signal and the second scanning signal after the noise treatment, the first touch unit corresponding to the first touch driving line Tx and the first touch sensing line Rx.

6. A noise scanning device for a touch display device, the touch display device comprising a touch panel, the touch panel comprising a plurality of touch units arranged in an array form, a plurality of touch driving lines Tx arranged in an array form, and a plurality of touch sensing lines Rx arranged in an array form, each touch driving line Tx being arranged perpendicular to each touch sensing line Rx, the noise scanning device comprising:
a touch scanning unit configured to perform a touch scanning operation on the touch panel;
a noise scanning unit configured to perform a noise scanning operation on the plurality of touch driving lines Tx or the plurality of touch sensing lines Rx while the touch scanning operation is performed by the touch scanning unit; and
an acquisition unit configured to acquire a position of each touch unit on the touch panel in accordance with a result of the touch scanning operation and a result of the noise scanning operation,
wherein each touch driving line Tx correspon

Assignees

• Boe Technology Group Co Ltd

Inventors

• Zhao Jiayang
• Shang Guangliang

Classifications

• G06F3/0418 Primary

  for error correction or compensation, e.g. based on parallax, calibration or alignment · CPC title

• G06F3/044

  by capacitive means · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title

• G06F3/0446

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title

• G06F3/0443 Primary

  using a single layer of sensing electrodes · CPC title