# US 11,307,536 B2 · Watches > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,307,536 B2 - Document ID: US11307536B2 - Status: Granted - Kind: B2 - Application number: 15/775,724 - Filed: 2015-11-12 - Published: 2018-09-06 - Granted: 2022-04-19 - Earliest claimed: 2015-11-12 - Assignees: Razer (Asia-Pacific) Pte. Ltd. - Applicants: Razer (Asia-Pacific) Pte. Ltd. - Inventors: Chee Oei Chan; Jian Yao Lien - Web page: https://patentgrep.com/patent/US11307536B2 ## CPC - G04G 19/00: Electric power supply circuits specially adapted for use in electronic time-pieces - G04C 10/00: Arrangements of electric power supplies in time-pieces {(Mounting, assembling of components G04C3/008)} - G04G 7/00: Synchronisation (radio-controlled time-pieces G04R) - G04G 9/007: {combined with a calculator or computing means} - G04G 19/06: Regulation - G04G 19/12: Arrangements for reducing power consumption during storage - G04G: ELECTRONIC TIME-PIECES - G04C: ELECTROMECHANICAL CLOCKS OR WATCHES ## Abstract According to various embodiments, a watch may be provided. The watch may include: a timing circuit configured to provide information about a current time; a smart watch circuit configured to provide smart watch functionality; a first battery configured to provide energy to the timing circuit; a second battery configured to provide energy to the smart watch circuit; and a communication circuit configured to provide communication between the timing circuit and the smart watch circuit; wherein the communication circuit includes a safety circuit configured to prevent leakage of current from the first battery to the second battery. ## Claims ### Claim 1 A watch comprising: a timing circuit comprising input and output connections and configured to provide information about a current time; a smart watch circuit comprising input and output connections and configured to provide smart watch functionality; a first battery configured to provide energy to the timing circuit, wherein the first battery is configured to provide energy only to the timing circuit, wherein the timing circuit only provides watch functions selected from the group consisting of time keeping, alarms, timer and lapse; a second battery configured to provide energy to the smart watch circuit; and a communication circuit configured to provide communication between the timing circuit and the smart watch circuit; and wherein the communication circuit comprises a safety circuit configured to prevent leakage of current from the first battery to the second battery; wherein the safety circuit, configured to prevent leakage of current from the first battery to the second battery, comprises a first set of input and output connections of the safety circuit which are respectively connected to the input and output connections of the timing circuit, and comprises a second set of input and output connections of the safety circuit which are respectively connected to the input and output connections of the smart watch circuit; wherein the first set of input and output connections of the safety circuit are configured to float; wherein the second set of input and output connections of the safety circuit are configured to pull low for respective output connections and are further configured to use a pullup resistor for respective input connections; wherein the timing circuit is configured to provide a reset signal to the smart watch circuit. ### Claim 2 (depends on 1) The watch of claim 1, wherein the first battery is configured to prevent providing energy to the smart watch circuit. ### Claim 3 (depends on 1) The watch of claim 1, wherein the second battery is configured to provide energy only to the smart watch circuit. ### Claim 4 (depends on 1) The watch of claim 1, wherein the second battery is configured to provide energy to the smart watch circuit and to the timing circuit if it is determined that the second battery comprises more than a pre-determined energy. ### Claim 5 (depends on 1) The watch of claim 1, wherein the communication circuit comprises at least one of an input/output buffer or a series of input/output buffers. ### Claim 6 (depends on 5) The watch of claim 5, wherein the input/output buffers comprises the safety circuit. ### Claim 7 (depends on 1) The watch of claim 1, wherein the communication circuit is configured to transmit setting information from the timing circuit to the smart watch circuit. ### Claim 8 (depends on 7) The watch of claim 7, wherein the setting information comprises at least one of the information about the current time and information indicating user preference settings. ### Claim 9 (depends on 1) The watch of claim 1, wherein the communication circuit is configured to provide synchronization information between the timing circuit and the smart watch circuit. ### Claim 10 (depends on 1) The watch of claim 1, further comprising: a display; wherein the timing circuit is configured to provide the information about the current time on the display; wherein the smart watch circuit is configured to provide information based on the smart watch functionality on the display. ### Claim 11 (depends on 1) The watch of claim 1, further comprising: a first electronic display; and a second electronic display; and wherein the timing circuit is configured to provide the information about the current time on the first display; and wherein the smart watch circuit is configured to provide information based on the smart watch functionality on the second display. ### Claim 12 (depends on 1) The watch of claim 1, wherein the first battery comprises at least one of a non-rechargeable battery and a coin cell. ### Claim 13 (depends on 1) The watch of claim 1, wherein the first battery is configured to provide a current of at least 20 uA or less. ### Claim 14 (depends on 1) The watch of claim 1, wherein the second battery comprises at least one of a rechargeable battery and a lithium ion battery. ### Claim 15 (depends on 1) The watch of claim 1, wherein the second battery is configured to provide a current of more than 50 uA. ### Claim 16 (depends on 1) The watch of claim 1, further comprising: a first crystal oscillator connected to the timing circuit; and a second crystal oscillator connected to the smart watch circuit; wherein the smart watch circuit is configured to communicate with an application on an external electronic device; wherein the second crystal serves as a real time clock and a timer to maintain a wireless link between the smart watch circuit and the external electronic device. ### Claim 17 (depends on 16) The watch of claim 16, wherein the each of the first crystal oscillator and the second crystal oscillator comprises a 32.768 kHz crystal oscillator. ### Claim 18 (depends on 16) The watch of claim 16, further comprising: a third crystal oscillator connected to the smart watch circuit for data transfer between the smart watch circuit and the external electronic device.