Pen, method for detecting pen, and touch system

Patent metadata

Field	Value
Publication number	US-11204671-B2
Application number	US-202016815300-A
Country	US
Kind code	B2
Filing date	Mar 11, 2020
Priority date	Nov 28, 2019
Publication date	Dec 21, 2021
Grant date	Dec 21, 2021

Abstract

A pen, a method for detecting a pen, and a touch system are disclosed. The pen is configured to operate on a touch panel. The pen includes a controller, a transmitting electrode, and a receiving electrode. The transmitting electrode and the receiving electrode are at different positions of the pen. The receiving electrode is configured to receive a first signal transmitted by the touch panel and transmit the first signal to the controller. The controller is configured to receive the first signal, determine an inclination angle between the pen and the touch panel according to a signal amount of the first signal, generate a second signal by using an encoding format corresponding to the inclination angle, and transmit the second signal to the transmitting electrode. The transmitting electrode is configured to receive the second signal and transmit the second signal to the touch panel.

First claim

What is claimed is:

1. A pen, configured to operate on a touch panel, wherein the pen comprises: a controller, a transmitting electrode, and a receiving electrode;
the transmitting electrode and the receiving electrode are at different positions of the pen, and the receiving electrode comprises a plurality of ring structures arranged in parallel;
the receiving electrode is coupled to the controller, and the receiving electrode is configured to receive a first signal transmitted by the touch panel and transmit the first signal to the controller;
the controller is further coupled to the transmitting electrode, and the controller is configured to receive the first signal from the receiving electrode, determine an inclination angle between the pen and the touch panel according to a signal amount of the first signal, generate a second signal by using an encoding format corresponding to the inclination angle, and transmit the second signal to the transmitting electrode;
the transmitting electrode is configured to receive the second signal from the controller and transmit the second signal to the touch panel;
wherein the controller further comprises a signal processing circuit and a signal generating circuit, and the signal processing circuit is coupled to the signal generating circuit;
the signal processing circuit is configured to calculate the signal amount of the first signal, determine the inclination angle corresponding to the signal amount of the first signal and the encoding format corresponding to the inclination angle according to a first signal level mapping table, and output the encoding format to the signal generating circuit, the signal amount of the first signal changes with a change in a distance between the receiving electrode and the touch panel, the first signal level mapping table comprises a mapping relationship between the signal amount of the first signal, an angle level, and the encoding format, and the angle level corresponds to the inclination angle;
the signal generating circuit is further coupled to the transmitting electrode, and the signal generating circuit is configured to receive the encoding format, generate the second signal according to the encoding format, and transmit the second signal to the transmitting electrode, and the second signal is obtained through signal modulation by using the encoding format; and
a time slot used to detect an X coordinate of a position of the pen and a time slot used to detect a Y coordinate of the position of the pen are different and are both further used to detect the inclination angle.

2. The pen according to claim 1 , further comprising a pen body and a pen tip,
wherein the transmitting electrode is at a position of the pen tip,
the receiving electrode is at a position, away from the transmitting electrode by a first distance, of the pen body, and
the controller is inside the pen body.

3. The pen according to claim 1 , wherein a frequency of the second signal is determined according to a stress level of the pen, and the frequency of the second signal changes with a change of the stress level of the pen.

4. The pen according to claim 1 , wherein the signal amount of the first signal decreases with an increase of the inclination angle.

5. The pen according to claim 1 , further comprising a memory, wherein the memory is configured to store the first signal level mapping table.

6. The pen according to claim 1 , wherein the encoding format is a binary encoding format.

7. The pen according to claim 1 , further comprising a power supply, wherein the power supply is configured to supply power to the controller.

8. A method for detecting a pen, wherein the pen is configured to operate on a touch panel, and the pen comprises: a controller, a transmitting electrode, and a receiving electrode;
the transmitting electrode and the receiving electrode are at different positions of the pen, and the receiving electrode comprises a plurality of ring structures arranged in parallel;
the receiving electrode is coupled to the controller, and the receiving electrode is configured to receive a first signal transmitted by the touch panel and transmit the first signal to the controller;
the controller is further coupled to the transmitting electrode, and the controller is configured to receive the first signal from the receiving electrode, determine an inclination angle between the pen and the touch panel according to a signal amount of the first signal, generate a second signal by using an encoding format corresponding to the inclination angle, and transmit the second signal to the transmitting electrode;
the transmitting electrode is configured to receive the second signal from the controller and transmit the second signal to the touch panel;
the controller further comprises a signal processing circuit and a signal generating circuit, and the signal processing circuit is coupled to the signal generating circuit;
the signal processing circuit is configured to calculate the signal amount of the first signal, determine the inclination angle corresponding to the signal amount of the first signal and the encoding format corresponding to the inclination angle according to a first signal level mapping table, and output the encoding format to the signal generating circuit, the signal amount of the first signal changes with a change in a distance between the receiving electrode and the touch panel, the first signal level mapping table comprises a mapping relationship between the signal amount of the first signal, an angle level, and the encoding format, and the angle level corresponds to the inclination angle;
the signal generating circuit is further coupled to the transmitting electrode, and the signal generating circuit is configured to receive the encoding format, generate the second signal according to the encoding format, and transmit the second signal to the transmitting electrode, and the second signal is obtained through signal modulation by using the encoding format; and
the method is performed by the touch panel, and the method comprises:
transmitting the first signal to the pen;
receiving the second signal transmitted by the pen, wherein the second signal is generated by using the encoding format corresponding to the inclination angle, and the inclination angle is determined according to the signal amount of the first signal; and
determining the inclination angle between the pen and the touch panel based on the encoding format,
wherein a time slot used to detect an X coordinate of a position of the pen and a time slot used to detect a Y coordinate of the position of the pen are different and are both further used to detect the inclination angle.

9. The method according to claim 8 , wherein determining the inclination angle between the pen and the touch panel based on the encoding format comprises:
identifying the encoding format of the second signal; and
determining the inclination angle corresponding to the encoding format according to a second signal level mapping table, wherein the second signal level mapping table comprises a mapping relationship between an angle level and the encoding format, and the angle level corresponds to the inclination angle.

10. The method according to claim 8 , further comprising:
determining pressure information and position information of the pen by identifying a frequency of the second signal in a case of determining the inclination angle corresponding to the encoding format.

11. A touch system, comprising a pen and a touch panel,
wherein the pen is configured to operate on the touch panel, and the pen comprises: a controller, a transmitting electrode, and a receiving electrode;
the transmitting

Assignees

• Hefei Boe Optoelectronics Tech
• Boe Technology Group Co Ltd

Inventors

• Yang Guanglei
• Fang Zhixiang
• Wang Meng
• Ding Peng
• Hu Xuxu

Classifications

• G06F2203/04106

  Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection · CPC title

• G06F3/03545 Primary

  Pens or stylus · CPC title

• G06F3/0441

  using active external devices, e.g. active pens, for receiving changes in electrical potential transmitted by the digitiser, e.g. tablet driving signals · CPC title

• G06F3/0442 Primary

  using active external devices, e.g. active pens, for transmitting changes in electrical potential to be received by the digitiser · CPC title

• G06F3/04162

  for exchanging data with external devices, e.g. smart pens, via the digitiser sensing hardware · CPC title