# US 2018/0025756 A1 · Electronic device and control method with instruction units based on a number of power supply off operations > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0025756 A1 - Document ID: US20180025756A1 - Status: Published application - Kind: A1 - Application number: 15/654,443 - Filed: 2017-07-19 - Published: 2018-01-25 - Earliest claimed: 2016-07-25 - Assignees: Canon Kabushiki Kaisha - Applicants: Canon Kabushiki Kaisha - Inventors: Shinichi Ono - Web page: https://patentgrep.com/patent/US20180025756A1 ## CPC - G11C 5/14: Power supply arrangements {, e.g. power down, chip selection or deselection, layout of wirings or power grids, or multiple supply levels} - G06F 1/3268: {Power saving in hard disk drive} - G06F 1/3284: {Power saving in printer} - G06F 1/3287: by switching off individual functional units in the computer system - G06F 3/1221: {with regard to power consumption} - G06F 11/3034: {where the computing system component is a storage system, e.g. DASD based or network based (digital input from or digital output to record carriers G06F3/06; digital recording or reproducing G11B20/18; for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS], H04L67/1097)} - G06F 11/3062: {where the monitored property is the power consumption (power management in a computing system G06F1/3203)} - G11C 5/143: {Detection of memory cassette insertion or removal; Continuity checks of supply or ground lines; Detection of supply variations, interruptions or levels (G11C5/148 takes precedence); Switching between alternative supplies (G11C5/141 takes precedence)} - G11C 5/148: {Details of power up or power down circuits, standby circuits or recovery circuits} - G06F 1/266: {Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips} - G06F 11/2015: {Redundant power supplies (power supply failure G06F1/30)} - G06F 2201/81: Threshold - G06F 2201/88: Monitoring involving counting - Y02D 10/00: Energy efficient computing, e.g. low power processors, power management or thermal management - G11C: STATIC STORES (semiconductor memory devices H10B) - 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 An electronic device includes a storage device and a plurality of instruction units. The plurality of instruction units respectively instruct to turn off a power supply of the storage device. At least one instruction unit among the plurality of instruction units instructs to supply power to the storage device in accordance with a total of the number of power supply off operations for the storage device respectively instructed by the plurality of instruction units. ## Claims ### Claim 1 An electronic device comprising: a storage device; and a plurality of instruction units that respectively instruct to turn off a power supply of the storage device, wherein at least one instruction unit among the plurality of instruction units instructs to supply power to the storage device in accordance with a total of the number of power supply off operations for the storage device respectively instructed by the plurality of instruction units. ### Claim 2 (depends on 1) The electronic device according to claim 1, wherein the plurality of instruction units respectively count the numbers of the instructed power supply off operations for the storage device, and wherein the at least one instruction unit among the plurality of instruction units combines the numbers of the instructed power supply off operations for the storage device respectively counted by the plurality of instruction units with each other and instructs to supply the power to the storage device in accordance with the combined number. ### Claim 3 (depends on 2) The electronic device according to claim 2, wherein the plurality of instruction units respectively write the counted numbers of the power supply off operations for the storage device to a plurality of non-volatile memories, and wherein the at least one instruction unit among the plurality of instruction units reads out the numbers of the power supply off operations for the storage device respectively counted by the plurality of instruction units from the plurality of non-volatile memories and combines the numbers of the instructed power supply off operations for the storage device respectively counted by the plurality of instruction units with each other. ### Claim 4 (depends on 3) The electronic device according to claim 3, wherein one instruction unit among the plurality of instruction units reads out the numbers of the power supply off operations for the storage device respectively counted by the plurality of instruction units from the plurality of non-volatile memories, combines the numbers of the instructed power supply off operations for the storage device respectively counted by the plurality of instruction units with each other, writes the combined number to one non-volatile memory among the plurality of non-volatile memories, and deletes the number stored in the other non-volatile memory. ### Claim 5 (depends on 1) The electronic device according to claim 1, wherein the at least one instruction unit among the plurality of instruction units instructs to turn off the power supply of the storage device in a power saving mode in a case where the total of the number of power supply off operations for the storage device respectively instructed by the plurality of instruction units is lower than a first threshold and does not instruct to turn off the power supply of the storage device in the power saving mode in a case where the total of the number of power supply off operations for the storage device respectively instructed by the plurality of instruction units is higher than or equal to the first threshold. ### Claim 6 (depends on 1) The electronic device according to claim 1, wherein the at least one instruction unit among the plurality of instruction units does not instruct to turn on the power supply of the storage device in a case where the total of the number of power supply off operations for the storage device respectively instructed by the plurality of instruction units is higher than or equal to a second threshold. ### Claim 7 (depends on 1) The electronic device according to claim 1, wherein the at least one instruction unit among the plurality of instruction units varies a time when turning-off of the power supply of the storage device is instructed from a starting time of a power saving mode in accordance with the total of the number of power supply off operations for the storage device respectively instructed by the plurality of instruction units. ### Claim 8 (depends on 1) The electronic device according to claim 1, wherein one instruction unit among the plurality of instruction units is a main control unit configured to control a higher-level device of the electronic device, and wherein the other instruction unit among the plurality of instruction units is a control unit configured to control the storage device and instruct the storage device to turn off the power supply when the main control unit is in a power saving state. ### Claim 9 (depends on 1) The electronic device according to claim 1, further comprising: a printing unit configured to perform printing. ### Claim 10 (depends on 1) The electronic device according to claim 1, wherein the at least one instruction unit among the plurality of instruction units counts the numbers of the instructed power supply off operations for the storage device in a case where the storage device is a magnetic-system storage device and does not count the numbers of the instructed power supply off operations for the storage device in a case where the storage device is a semiconductor storage device. ### Claim 11 A control method for an electronic device including a storage device, and a plurality of instruction units that respectively instruct to turn off a power supply of the storage device, the control method comprising: instructing to supply power to the storage device by at least one instruction unit among the plurality of instruction units in accordance with a total of the number of power supply off operations for the storage device respectively instructed by the plurality of instruction units.