Touch panel driving method and apparatus, and touch display device

Patent metadata

Field	Value
Publication number	US-11928282-B2
Application number	US-202117642848-A
Country	US
Kind code	B2
Filing date	May 18, 2021
Priority date	Jun 3, 2020
Publication date	Mar 12, 2024
Grant date	Mar 12, 2024

Abstract

The driving method includes: inputting a first scanning signal to each of the first touch electrodes at a same time, and receiving a first sensing signal of each of the second touch electrodes to determine a suspected column according to the first sensing signal; inputting a second scanning signal to each of the second touch electrodes at a same time, and receiving a second sensing signal of each of the first touch electrodes to determine a suspected row according to the second sensing signal; determining a suspected touch region according to the suspected column and the suspected row; and sequentially inputting a third scanning signal row by row to each of the first touch electrodes in the suspected touch region, and receiving a third sensing signal of each of the second touch electrodes in the suspected touch region to determine a touch position according to the third sensing signal.

First claim

The invention claimed is:

1. A touch panel driving method, wherein, the touch panel comprises a plurality of first touch electrodes distributed along a row direction and a plurality of second touch electrodes distributed along a column direction, and the method comprises:
inputting a first scanning signal to each of the first touch electrodes at a same time, and receiving a first sensing signal of each of the second touch electrodes to determine a suspected column according to the first sensing signal;
inputting a second scanning signal to each of the second touch electrodes at a same time, and receiving a second sensing signal of each of the first touch electrodes to determine a suspected row according to the second sensing signal;
determining a suspected touch region according to the suspected column and the suspected row; and
sequentially inputting a third scanning signal row by row to each of the first touch electrodes in the suspected touch region, and receiving a third sensing signal of each of the second touch electrodes in the suspected touch region to determine a touch position according to the third sensing signal;
wherein when the suspected row is one suspected row and the suspected column is one suspected column, the step of determining the suspected touch region according to the suspected column and the suspected row comprises:
adding a first preset value to a row number where the suspected row is located to obtain a first target row number;
subtracting a second preset value from a row number where the suspected row is located to obtain a second target row number;
adding a third preset value to a column number where the suspected column is located to obtain a first target column number;
subtracting a fourth preset value from a column number where the suspected column is located to obtain a second target column number; and
determining a region surrounded by the first target row number, the second target row number, the first target column number and the second target column number as the suspected touch region.

2. The method according to claim 1 , wherein the step of inputting the first scanning signal to each of the first touch electrodes at a same time, and receiving the first sensing signal of each of the second touch electrodes to determine the suspected column according to the first sensing signal comprises:
inputting continuous K first scanning signals to each of the first touch electrodes at a same time, and receiving K first sensing signals of each of the second touch electrodes;
converting the K first sensing signals to K first capacitance data;
for each of the second touch electrodes, if it is detected that at least S first capacitance data in the K first capacitance data are greater than or equal to a first set threshold, determining the position of the second touch electrode to be the suspected column;
wherein, K is greater than or equal to S, and S is a positive integer greater than 1.

3. The method according to claim 1 , wherein the step of inputting the second scanning signal to each of the second touch electrodes at a same time, and receiving the second sensing signal of each of the first touch electrodes to determine the suspected row according to the second sensing signal comprises:
inputting continuous K second scanning signals to each of the second touch electrodes at a same time, and receiving K second sensing signals of each of the first touch electrodes;
converting the K second sensing signals to K second capacitance data;
for each of the first touch electrodes, if it is detected that at least S second capacitance data in the K second capacitance data are greater than or equal to a second set threshold, determining the position of the second touch electrode to be the suspected row;
wherein, K is greater than or equal to S, and S is a positive integer greater than 1.

4. The method according to claim 1 , wherein the first touch electrode is a touch driving electrode, and the second touch electrode is a touch sensing electrode.

5. The method according to claim 1 , wherein the first scanning signal, the second scanning signal and the third scanning signal are square wave signals or sine wave signals.

6. A computing and processing device, wherein the computing and processing device comprises:
a memory, wherein the memory stores a computer readable code; and
one or more processors, when the computer readable code is executed by one or more processors, the computing and processing device executes the touch panel driving method according to claim 1 .

7. A touch panel driving method, wherein, the touch panel comprises a plurality of first touch electrodes distributed along a row direction and a plurality of second touch electrodes distributed along a column direction, and the method comprises:
inputting a first scanning signal to each of the first touch electrodes at a same time, and receiving a first sensing signal of each of the second touch electrodes to determine a suspected column according to the first sensing signal;
inputting a second scanning signal to each of the second touch electrodes at a same time, and receiving a second sensing signal of each of the first touch electrodes to determine a suspected row according to the second sensing signal;
determining a suspected touch region according to the suspected column and the suspected row; and
sequentially inputting a third scanning signal row by row to each of the first touch electrodes in the suspected touch region, and receiving a third sensing signal of each of the second touch electrodes in the suspected touch region to determine a touch position according to the third sensing signal;
wherein when the suspected row is multiple suspected rows and the suspected column is multiple suspected columns, the step of determining the suspected touch region according to the suspected column and the suspected row comprises:
determining a maximum value and a minimum value of row numbers where a plurality of suspected rows are located as a maximum suspected row number and a minimum suspected row number, respectively;
determining a maximum value and a minimum value of column numbers where a plurality of suspected columns are located as a maximum suspected column number and a minimum suspected column number, respectively;
adding a first preset value to the maximum suspected row number to obtain a first target row number;
subtracting a second preset value from the minimum suspected row number to obtain a second target row number;
adding a third preset value to the maximum suspected column number to obtain a first target column number;
subtracting a fourth preset value from the minimum suspected column number to obtain a second target column number; and
determining a region surrounded by the first target row number, the second target row number, the first target column number and the second target column number as the suspected touch region.

8. A touch display device, wherein the touch display device comprises a touch panel and a touch panel driving apparatus configured for executing the operations comprising:
inputting a first scanning signal to each of the first touch electrodes at a same time, and receiving a first sensing signal of each of the second touch electrodes to determine a suspected column according to the first sensing signal;
inputting a second scanning signal to each of the second touch electrodes at a same time, and receiving a second sensing signal of each of the first touch electrodes to determine a suspected row according to the second sensing signal;
determining a suspected touch region according to the suspected column and the suspected row; and
sequentially inputting a third scanning signal row by row to each of the first tou

Assignees

• Beijing Boe Display Tech Co
• Boe Technology Group Co Ltd

Inventors

• Guo Rui
• Han Lihui
• Su Junning
• Bu Zhanchang
• Wang Hetao

Classifications

• G06F3/04166 Primary

  Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving (Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184) · CPC title

• G06F3/0446 Primary

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

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/044

  by capacitive means · CPC title

• G06F3/04164

  Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads · CPC title