# US 10,503,283 B2 · Active pen, active pen touch system and method for performing touch using active pen > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,503,283 B2 - Document ID: US10503283B2 - Status: Granted - Kind: B2 - Application number: 16/016,821 - Filed: 2018-06-25 - Published: 2019-07-04 - Granted: 2019-12-10 - Earliest claimed: 2018-01-02 - Assignees: Boe Technology Group Co., Ltd.; Hefei Boe Optoelectronics Technology Co., Ltd. - Applicants: Boe Technology Group Co., Ltd.; Hefei Boe Optoelectronics Technology Co., Ltd. - Inventors: Chao Wang; Zhixiang Fang - Web page: https://patentgrep.com/patent/US10503283B2 ## CPC - G06F 3/03545: {Pens or stylus} - G06F 3/0383: {Signal control means within the pointing device} - G06F 3/04162: {for exchanging data with external devices, e.g. smart pens, via the digitiser sensing hardware} - G06F 3/0441: {using active external devices, e.g. active pens, for receiving changes in electrical potential transmitted by the digitiser, e.g. tablet driving signals} - G06F 3/0442: {using active external devices, e.g. active pens, for transmitting changes in electrical potential to be received by the digitiser} - G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes} - G06F 2203/04107: Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract The present disclosure provides an active pen, an active pen touch system and a method for performing touch using an active pen. The active pen comprises an active pen main body comprising a pen tip and a pen body, wherein the pen tip is configured to receive a signal from a touch screen; a judgment circuit electrically connected to the pen tip, and configured to judge whether the signal is a synchronization control signal or an electrostatic signal; and an electrostatic discharge switch circuit electrically connected between the judgment circuit and the pen body, and configured to be turned on on condition that the signal is an electrostatic signal, so as to electrically connect the judgment circuit to the pen body. ## Claims ### Claim 1 An active pen, comprising: an active pen main body comprising a pen tip and a pen body, wherein the pen tip is configured to receive a signal from a touch screen; a judgment circuit electrically connected to the pen tip, and configured to judge whether the signal is a synchronization control signal or an electrostatic signal; and an electrostatic discharge switch circuit electrically connected between the judgment circuit and the pen body, and configured to be turned on on condition that the signal is an electrostatic signal, so as to electrically connect the judgment circuit to the pen body. ### Claim 2 (depends on 1) The active pen according to claim 1, wherein the electrostatic discharge switch circuit is a switch diode. ### Claim 3 (depends on 2) An active pen touch system, comprising a touch screen and the active pen according to claim 2. ### Claim 4 (depends on 3) The active pen touch system according to claim 3, wherein a ground line is provided between adjacent signal transmission leads in the touch screen, and a ground line is provided between adjacent signal reception leads in the touch screen. ### Claim 5 (depends on 1) The active pen according to claim 1, further comprising: a synchronization circuit electrically connected to the judgment circuit, and configured to receive the signal on condition that the signal is the synchronization control signal; and a coordinate driving transmission circuit electrically connected to the pen tip, and configured to transmit a driving signal to the touch screen through the pen tip, wherein the synchronization circuit is configured to control the coordinate driving transmission circuit to transmit the driving signal to the touch screen according to the synchronization control signal when the synchronization control signal is received. ### Claim 6 (depends on 5) An active pen touch system, comprising a touch screen and the active pen according to claim 5. ### Claim 7 (depends on 6) The active pen touch system according to claim 6, wherein a ground line is provided between adjacent signal transmission leads in the touch screen, and a ground line is provided between adjacent signal reception leads in the touch screen. ### Claim 8 (depends on 5) The active pen according to claim 5, further comprising: a pressure sensor configured to sense a pressure of a contact between the pen tip and the touch screen and generate a pressure signal according to the pressure; and a pressure signal transmission circuit electrically connected to the pressure sensor and configured to transmit the pressure signal to the touch screen through the pen tip, wherein the synchronization circuit is further configured to control the pressure signal transmission circuit to transmit the pressure signal to the touch screen according to the synchronization control signal. ### Claim 9 (depends on 8) An active pen touch system, comprising a touch screen and the active pen according to claim 8. ### Claim 10 (depends on 9) The active pen touch system according to claim 9, wherein a ground line is provided between adjacent signal transmission leads in the touch screen, and a ground line is provided between adjacent signal reception leads in the touch screen. ### Claim 11 (depends on 1) The active pen according to claim 1, wherein the judgment circuit is configured to judge whether the signal is a synchronization control signal based on an encoding feature of a communication between the active pen and the touch screen, and determine the signal as an electrostatic signal on condition that the signal is not a synchronization control signal. ### Claim 12 (depends on 11) An active pen touch system, comprising a touch screen and the active pen according to claim 11. ### Claim 13 (depends on 12) The active pen touch system according to claim 12, wherein a ground line is provided between adjacent signal transmission leads in the touch screen, and a ground line is provided between adjacent signal reception leads in the touch screen. ### Claim 14 (depends on 1) An active pen touch system, comprising a touch screen and the active pen according to claim 1. ### Claim 15 (depends on 14) The active pen touch system according to claim 14, wherein a ground line is provided between adjacent signal transmission leads in the touch screen. ### Claim 16 (depends on 14) The active pen touch system according to claim 14, wherein a ground line is provided between adjacent signal reception leads in the touch screen. ### Claim 17 A method for performing touch using an active pen, wherein the active pen comprises a pen tip and a pen body, the method comprising: contacting, by the pen tip of the active pen, with the touch screen to receive a signal from the touch screen; judging whether the signal is a synchronization control signal or an electrostatic signal; and electrically connecting the pen tip to the pen body on condition that the signal is an electrostatic signal. ### Claim 18 (depends on 17) The method according to claim 17, further comprising: on condition that the signal is a synchronization control signal, transmitting a driving signal to the touch screen according to the synchronization control signal. ### Claim 19 (depends on 18) The method according to claim 18, further comprising: sensing a pressure of a contact between the pen tip and the touch screen, and generating a pressure signal according to the pressure; and transmitting a pressure signal to the touch screen through the pen tip according to the synchronization control signal. ### Claim 20 (depends on 17) The method according to claim 17, wherein the step of judging whether the signal is a synchronization control signal or an electrostatic signal comprises: judging whether the signal is a synchronization control signal or an electrostatic signal based on an encoding feature of a communication between the active pen and the touch screen, and determining the signal as an electrostatic signal on condition that the signal is not a synchronization control signal.