# US 2022/0046534 A1 · Power control device, method, and terminal device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0046534 A1 - Document ID: US20220046534A1 - Status: Published application - Kind: A1 - Application number: 17/510,147 - Filed: 2021-10-25 - Published: 2022-02-10 - Earliest claimed: 2019-04-25 - Assignees: Vivo Mobile Communication Co., Ltd. - Applicants: Vivo Mobile Communication Co.,Ltd. - Inventors: Chaojie Shao - Web page: https://patentgrep.com/patent/US20220046534A1 ## CPC - H04W 52/028: {switching on or off only a part of the equipment circuit blocks} - G06F 1/26: Power supply means, e.g. regulation thereof (for memories G11C) - G06F 1/30: Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations (for resetting only G06F1/24) - G06F 1/325: {Power saving in peripheral device} - G06F 1/3287: by switching off individual functional units in the computer system - H04W 52/0235: {where the received signal is a power saving command} - H04W 52/0238: {where the received signal is an unwanted signal, e.g. interference or idle signal} - Y02D 10/00: Energy efficient computing, e.g. low power processors, power management or thermal management - Y02D 30/70: in wireless communication networks - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract A power control device includes: a modem, a first power management module connected to the modem, an AP, a second power management module connected to the AP, and a control circuit connected to the AP, the first power management module and the second power management module. The second power management module is configured to output a second control signal to the first power management module. The AP is configured to generate a first control signal and output the first control signal to the control circuit in a case that a shutdown instruction is received or an abnormal power-down is detected. The control module is configured to convert the second control signal into a third control signal under control of the first control signal. The first power management module is configured to stop power supply to the modem under control of the third control signal. ## Claims ### Claim 1 A power control device, the power control device comprising: a modem, a first power management module connected to the modem, an application processor (AP), a second power management module connected to the AP, and a control circuit connected to the AP, the first power management module and the second power management module; wherein the second power management module is configured to output a second control signal to the first power management module before the AP receives a shutdown instruction or an abnormal power-down is detected; the AP is configured to generate a first control signal and output the first control signal to the control circuit in a case that a shutdown instruction is received or an abnormal power-down is detected; the control circuit is configured to convert the second control signal into a third control signal under control of the first control signal, so that the second power management module outputs the third control signal to the first power management module; the first power management module is configured to stop power supply to the modem under control of the third control signal. ### Claim 2 (depends on 1) The power control device according to claim 1, wherein the AP is further configured to output the first control signal to the second power management module; and the second power management module is further configured to stop power supply to the AP under the control of the first control signal. ### Claim 3 (depends on 2) The power control device according to claim 2, wherein the first control signal is a low-level control signal, the second control signal is a high-level reset signal, and the third control signal is a low-level reset signal. ### Claim 4 (depends on 3) The power control device according to claim 3, wherein the control circuit comprises a phase inverter and a switching transistor; and an input terminal of the phase inverter is connected to the AP, an output terminal of the phase inverter is connected to a first terminal of the switching transistor, a second terminal of the switching transistor is connected to both the first power management module and the second power management module, and a third terminal of the switching transistor is grounded. ### Claim 5 (depends on 4) The power control device according to claim 4, wherein the phase inverter is a NOT gate, and the switching transistor is an N-type field effect transistor. ### Claim 6 (depends on 3) The power control device according to claim 3, wherein the control circuit comprises a switching transistor; a first terminal of the switching transistor is connected to the AP, a second terminal of the switching transistor is connected to both the first power management module and the second power management module, and a third terminal of the switching transistor is grounded. ### Claim 7 (depends on 6) The power control device according to claim 6, wherein the switching transistor is a P-type field effect transistor. ### Claim 8 A power control method, applied to a power control device, wherein the power control device comprises a modem, a first power management module connected to the modem, an application processor (AP), and a second power management module connected to the AP, and the method comprises: generating a first control signal in a case that the AP receives a shutdown instruction or an abnormal power-down is detected; converting, under control of the first control signal, a second control signal into a third control signal, wherein the second control signal is a signal output by the second power management module to the first power management module before the AP receives a shutdown instruction or an abnormal power-down is detected; stopping power supply to the modem under control of the third control signal. ### Claim 9 (depends on 8) The method according to claim 8, wherein after the generating a first control signal, the method further comprises: stopping, under the control of the first control signal, power supply to the AP. ### Claim 10 (depends on 9) The method according to claim 9, wherein the first control signal is a low-level control signal, the second control signal is a high-level reset signal, and the third control signal is a low-level reset signal. ### Claim 11 A terminal device, comprising a power control device, wherein the power control device comprises a modem, a first power management module connected to the modem, an application processor (AP), and a second power management module connected to the AP, and the terminal device further comprises: a processor, a memory, and a computer program stored in the memory and executable on the processor; the computer program, when executed by the processor, causes the power control device to perform: generating a first control signal in a case that the AP receives a shutdown instruction or an abnormal power-down is detected; converting, under control of the first control signal, a second control signal into a third control signal, wherein the second control signal is a signal output by the second power management module to the first power management module before the AP receives a shutdown instruction or an abnormal power-down is detected; stopping power supply to the modem under control of the third control signal. ### Claim 12 (depends on 11) The terminal device according to claim 11, wherein the computer program, when executed by the processor, causes the power control device to perform: stopping, under the control of the first control signal, power supply to the AP. ### Claim 13 (depends on 12) The terminal device according to claim 12, wherein the first control signal is a low-level control signal, the second control signal is a high-level reset signal, and the third control signal is a low-level reset signal. ### Claim 14 A non-transitory computer-readable storage medium, applied to a terminal device, wherein the terminal device comprises a power control device, and the power control device comprises a modem, a first power management module connected to the modem, an application processor (AP), and a second power management module connected to the AP; the non-transitory computer-readable storage medium stores a computer program, and the computer program, when executed by a processor of the terminal device, causes the power control device to perform: generating a first control signal in a case that the AP receives a shutdown instruction or an abnormal power-down is detected; converting, under control of the first control signal, a second control signal into a third control signal, wherein the second control signal is a signal output by the second power management module to the first power management module before the AP receives a shutdown instruction or an abnormal power-down is detected; stopping power supply to the modem under control of the third control signal. ### Claim 15 (depends on 14) The non-transitory computer-readable storage medium according to claim 14, wherein the computer program, when executed by the processor, causes the power control device to perform: stopping, under the control of the first control signal, power supply to the AP. ### Claim 16 (depends on 15) The non-transitory computer-readable storage medium according to claim 15, wherein the first control signal is a low-level control signal, the second control signal is a high-level reset signal, and the third control signal is a low-level reset signal.