# US 2023/0403607 A1 · Method for communication between wireless earphone and charging case, charging case, tws earphone, and system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0403607 A1 - Document ID: US20230403607A1 - Status: Published application - Kind: A1 - Application number: 17/766,788 - Filed: 2019-12-28 - Published: 2023-12-14 - Earliest claimed: 2019-10-31 - Assignees: Goertek Inc. - Applicants: Goertek Inc. - Inventors: Qiang CHEN; Pei YANG - Web page: https://patentgrep.com/patent/US20230403607A1 ## CPC - H04W 28/18: Negotiating wireless communication parameters - H04R 1/1025: Accumulators specially adapted for earpieces; Arrangements specially adapted for charging thereof - H04W 48/16: Discovering, processing access restriction or access information - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K) ## Abstract A method for communicating between a wireless earphone and a charging case, a charging case, a TWS earphone and a TWS earphone system are provided. In the method, in response to a case opening signal, the earphone case I/O controlling module is controlled to set an operation attribute of the first I/O interface as a communication interface. A predetermined negotiation signal is transmitted to the wireless earphone via the first I/O interface. It is determined whether a negotiation confirmation signal corresponding to the predetermined negotiation signal is received from the wireless earphone via the first I/O interface. In a case that the negotiation confirmation signal corresponding to the predetermined negotiation signal is received from the wireless earphone via the first I/O interface, the charging case enters into a communication mode for communicating with the wireless earphone. ## Claims ### Claim 1 A method for communicating between a wireless earphone and a charging case, wherein the charging case comprises a first processor, an earphone case I/O controlling module and a first I/O interface, the method is applied to the first processor, and the method comprises: controlling, in response to a case open signal, the earphone case I/O controlling module to set an operation attribute of the first I/O interface as a communication interface; transmitting a predetermined negotiation signal to the wireless earphone via the first I/O interface; determining whether a negotiation confirmation signal corresponding to the predetermined negotiation signal is received from the wireless earphone via the first I/O interface; and controlling the charging case to enter into a communication mode for communicating with the wireless earphone in a case that the negotiation confirmation signal corresponding to the predetermined negotiation signal is received from the wireless earphone via the first I/O interface. ### Claim 2 (depends on 1) The method for communicating between a wireless earphone and a charging case according to claim 1, wherein before transmitting the predetermined negotiation signal to the wireless earphone via the first I/O interface, the method further comprises: transmitting an interrupt triggering signal to the wireless earphone via the first I/O interface to trigger the wireless earphone to close interrupt until transmitting the negotiation confirmation signal. ### Claim 3 (depends on 1) The method for communicating between a wireless earphone and a charging case according to claim 1, wherein after controlling the charging case to enter into the communication mode for communicating with the wireless earphone, the method further comprises: transmitting, in response to a case close signal, a case close message to the wireless earphone via the first I/O interface to control the wireless earphone to enter into a charging mode; and controlling the earphone case I/O controlling module to set the operation attribute of the first I/O interface as a charging interface to control the charging case to enter into the charging mode for charging the wireless earphone. ### Claim 4 (depends on 1) The method for communicating between a wireless earphone and a charging case according to claim 1, wherein before transmitting the predetermined negotiation signal to the wireless earphone via the first I/O interface, the method further comprises: switching an interface, arranged in the first processor and used for communicating with the wireless earphone, from a TX port to a general-purpose input/output (GPIO) interface; and before controlling the charging case to enter into the communication mode for communicating with the wireless earphone, the method further comprises: switching the interface, arranged in the first processor and used for communicating with the wireless earphone, from the GPIO interface to the TX port. ### Claim 5 A method for communicating between a wireless earphone and a charging case, wherein the wireless earphone comprises a second processor, an earphone I/O controlling module, a second I/O interface, and a third I/O interface connected to the second I/O interface, the method is applied to the second processor, and the method comprises: receiving, via the third I/O interface, a predetermined negotiation signal transmitted by the charging case via a first I/O interface; determining whether the predetermined negotiation signal meets a predetermined negotiation requirement; and in a case that the predetermined negotiation signal meets the predetermined negotiation requirement, transmitting a negotiation confirmation signal corresponding to the predetermined negotiation signal via the third I/O interface, and then controlling the earphone I/O controlling module to set an operation attribute of the second I/O interface as a communication interface to control the wireless earphone to enter into a communication mode for communicating with the charging case. ### Claim 6 (depends on 5) The method for communicating between a wireless earphone and a charging case according to claim 5, wherein before receiving, via the third I/O interface, the predetermined negotiation signal transmitted by the charging case via the first I/O interface, the method further comprises: receiving an interrupt triggering signal via the third I/O interface from the charging case; and closing interrupt until transmitting the negotiation confirmation signal. ### Claim 7 (depends on 6) The method for communicating between a wireless earphone and a charging case according to claim 6, wherein after controlling the wireless earphone to enter into the communication mode for communicating with the charging case, the method further comprises: receiving a case closing message via the second I/O interface from the charging case; and controlling the earphone I/O controlling module to set the operation attribute of the second I/O interface as a charging interface to control the wireless earphone to enter into a charging mode. ### Claim 8 (depends on 1) A charging case, comprising a first processor, an earphone case I/O controlling module and a first I/O interface, wherein the first processor is configured to execute a computer program to perform the method for communicating between a wireless earphone and a charging case according to claim 1. ### Claim 9 (depends on 5) A TWS earphone, comprising a second processor, an earphone I/O controlling module, a second I/O interface, and a third I/O interface connected to the second I/O interface, wherein the second processor is configured to execute a computer program to perform the method for communicating between a wireless earphone and a charging case according to claim 5. ### Claim 10 A TWS earphone system, comprising a charging case and a TWS earphone, wherein the charging case comprises a first processor, an earphone case I/O controlling module and a first I/O interface, and the first processor is configured to execute a computer program to perform: controlling, in response to a case opening signal, the earphone case I/O controlling module to set an operation attribute of the first I/O interface as a communication interface; transmitting a predetermined negotiation signal to the wireless earphone via the first I/O interface; determining whether a negotiation confirmation signal corresponding to the predetermined negotiation signal is received from the wireless earphone via the first I/O interface; and controlling the charging case to enter into a communication mode for communicating with the wireless earphone in a case that the negotiation confirmation signal corresponding to the predetermined negotiation signal is received from the wireless earphone via the first I/O interface; and the TWS earphone comprises a second processor, an earphone I/O controlling module, a second I/O interface, and a third I/O interface connected to the second I/O interface, and the second processor is configured to execute a computer program to perform: receiving, via the third I/O interface, a predetermined negotiation signal transmitted via a first I/O interface by the charging case; determining whether the predetermined negotiation signal meets a predetermined negotiation requirement; and in a case that the predetermined negotiation signal meets the predetermined negotiation requirement, transmitting a negotiation confirmation signal corresponding to the predetermined negotiation signal via the third I/O interface, and then controlling the earphone I/O controlling module to set an operation attribute of the second I/O interface as a communication interface to control the wireless earphone to enter into a communication mode for communicating with the charging case.