Information processing system, power supply device, information processing device, and control method

Abstract

The present invention appropriately detects whether an information processing device is used in a place where a power supply is unstable and makes the information processing device operate stably. An information processing system is provided with: an information processing device; and a power supply device that supplies the DC power converted from the AC power to the information processing device. A power supply device is provided with: a power supply unit that converts AC power into DC power and outputs the DC power; a power state detection unit that detects the state of the AC power; and a power information control unit that transmits power information based on the detection result of the power state detection unit to the information processing device. The information processing apparatus includes: a power supply unit that generates power consumed by a load in the information processing apparatus on the basis of DC power supplied from a power supply apparatus; and a control unit that controls power consumed by a load in the information processing device on the basis of the power information transmitted from the power supply device.

Description

TECHNICAL FIELD

[0001] The present application relates to an information processing system, a power supply device, an information processing device, and a control method. BACKGROUND

[0002] An information processing device such as a notebook or tablet personal computer, which is capable of being carried, is generally equipped with a battery, and by connecting an AC adapter, it is possible to charge the battery using the power supplied from the AC adapter, generate a system power supply, and supply power to each load within the information processing device to make it operate (for example, refer to Patent Document 1).

[0003] However, for an AC power supply, there is a power limitation due to the place such as an airplane, a train, and the like, and the power supply sometimes becomes unstable. In the past, in the case of an environment in which the power supply is unstable, the following countermeasure was taken: by reducing the power consumed on the information processing device side, stable operation was performed. For example, the information processing device, when detecting the disconnection of the power supply from the AC adapter a plurality of times within a prescribed time, by performing control to reduce the power consumption, the operation was stabilized.

[0004] Patent Document 1: Japanese Patent Application Laid-Open No. 2003-295980

[0005] However, in the method of detecting the disconnection of the power supply from the AC adapter on the information processing device side as in the past, whether the power supply on the AC outlet side (the input side of the AC adapter) is disconnected or the connection of the AC adapter to the information processing device is disconnected, it is detected as the same event (phenomenon), and therefore, it cannot be distinguished. Therefore, for example, in the case where the user performs plugging and unplugging of the connection of the AC adapter to the information processing device a plurality of times, it is erroneously detected that the AC power supply is in an unstable state, and it is feared that the power consumption is unnecessarily reduced. SUMMARY

[0006] The present application was completed in view of the above-described circumstances, and one of the objects is to provide an information processing system, a power supply device, an information processing device, and a control method, which can appropriately detect whether it is being used in a place in which the power supply is unstable and make the information processing device operate stably.

[0007] The present invention was made to solve the aforementioned problems. The information processing system according to the first aspect of the present invention includes: an information processing device; and a power supply device that supplies DC power converted from AC power to the information processing device. The power supply device includes: a power supply unit that converts the AC power into DC power and outputs it; a power status detection unit that detects the status of the AC power; and a power information control unit that sends power information based on the detection result of the power status detection unit to the information processing device. The information processing device includes: a power supply unit that generates power consumed by a load within the information processing device based on the DC power supplied from the power supply device; and a control unit that controls the power consumed by the load within the information processing device based on the power information sent from the power supply device.

[0008] Alternatively, in the aforementioned information processing system, within the aforementioned power supply device, the power information control unit, based on the detection results of the aforementioned power status detection unit, sends information indicating the available power supply as the aforementioned power information to the aforementioned information processing device.

[0009] Alternatively, in the aforementioned information processing system, in the aforementioned power supply device, the aforementioned power status detection unit detects the voltage fluctuation of the aforementioned AC power, and the aforementioned power information control unit changes the power that can be supplied from the initial value based on the detection result of the voltage fluctuation of the aforementioned AC power by the aforementioned power status detection unit.

[0010] Alternatively, in the aforementioned information processing system and the aforementioned power supply device, the aforementioned power status detection unit detects the frequency of the aforementioned AC power, and the aforementioned power information control unit changes the power that can be supplied from the initial value based on the detection result of the aforementioned power status detection unit on the frequency of the aforementioned AC power.

[0011] Alternatively, in the aforementioned information processing system, when the connection between the power supply device and the information processing device is disconnected, the power information control unit sets the available power supply to an initial value.

[0012] Alternatively, in the aforementioned information processing system, within the aforementioned information processing device, the control unit controls the power consumed by the load within the aforementioned information processing device, with the power supply information transmitted from the aforementioned power supply device as the upper limit.

[0013] Alternatively, in the aforementioned information processing system, the power supply device may include a backup power supply, which is used to provide power alternatively when the power status detection unit and the power information control unit are unable to be supplied with power due to voltage fluctuations in the AC power.

[0014] Alternatively, in the aforementioned information processing system, in the aforementioned power supply device, the power information control unit, based on the detection result of the aforementioned power status detection unit, determines that the aforementioned AC power has become unstable, and then sends the aforementioned power information to the aforementioned information processing device.

[0015] Alternatively, in the aforementioned information processing system, in the aforementioned power supply device, the aforementioned power status detection unit detects the voltage fluctuations of the aforementioned AC power, and the aforementioned power information control unit, based on the detection result of the aforementioned power status detection unit on the voltage fluctuations of the aforementioned AC power, determines that the aforementioned AC power has become unstable, and sends the aforementioned power information to the aforementioned information processing device.

[0016] Alternatively, in the aforementioned information processing system, within the aforementioned information processing device, the control unit controls the upper limit of the power consumed by the load within the aforementioned information processing device based on the power information sent from the aforementioned power supply device.

[0017] Furthermore, the power supply device according to the second aspect of the present invention, which supplies DC power converted from AC power to an information processing device, comprises: a power supply unit that converts the AC power into DC power and outputs it; a power status detection unit that detects the status of the AC power; and a power information control unit that, based on the detection result of the power status detection unit, sends power information indicating the available power to the information processing device.

[0018] Furthermore, the power supply device according to the third aspect of the present invention, which supplies DC power converted from AC power to an information processing device, includes: a power supply unit that converts the AC power into DC power and outputs it; a power status detection unit that detects the status of the AC power; and a power information control unit that, when it is determined based on the detection result of the power status detection unit that the AC power has become unstable, sends power information based on the determination result to the information processing device.

[0019] Furthermore, the information processing apparatus according to the fourth aspect of the present invention, which receives DC power converted from AC power from a power supply device, comprises: a power supply unit that generates power consumed by a load within the information processing apparatus based on the DC power supplied from the power supply device; and a control unit that acquires power information from the power supply device based on a detection result of the state of the AC power, and controls an upper limit of the power consumed by the load within the information processing apparatus based on the acquired power information.

[0020] Furthermore, the control method in the information processing system according to the fifth aspect of the present invention, which includes an information processing device and a power supply device that supplies DC power converted from AC power to the information processing device, includes: a step in which the power supply device converts the AC power into DC power and outputs it; a step in which the state of the AC power is detected; and a step in which power information based on the detection result of the state of the AC power is sent to the information processing device. It also includes: a step in which the information processing device generates power consumed by a load within the information processing device based on the DC power supplied from the power supply device; a step in which the power information sent from the power supply device is acquired; and a step in which the power consumed by the load within the information processing device is controlled based on the acquired power information.

[0021] Furthermore, the control method in the power supply device that supplies DC power converted from AC power to the information processing device according to the sixth aspect of the present invention includes: a step in which the power supply unit converts the AC power into the DC power and outputs it; a step in which the power status detection unit detects the status of the AC power; and a step in which the power information control unit sends power information indicating the available power to the information processing device based on the detection result of the power status detection unit.

[0022] Furthermore, the control method in the power supply device that supplies DC power converted from AC power to the information processing device according to the seventh aspect of the present invention includes: a step in which the power supply unit converts the AC power into the DC power and outputs it; a step in which the power status detection unit detects the status of the AC power; and a step in which the power information control unit sends power information based on the determination result to the information processing device when the AC power is determined to be unstable based on the detection result of the power status detection unit.

[0023] Furthermore, the control method in an information processing apparatus that receives DC power converted from AC power from a power supply device according to the eighth aspect of the present invention includes: a step in which a power supply unit generates power consumed by a load within the information processing apparatus based on the DC power supplied from the power supply device; a step in which a control unit obtains power information from the power supply device based on a detection result of the state of the AC power; and a step in which the control unit controls an upper limit of the power consumed by the load within the information processing apparatus based on the obtained power information.

[0024] According to the above-described method of the present invention, it is possible to properly detect whether the device is being used in a location with unstable power supply and to ensure stable operation of the information processing device. Attached Figure Description

[0025] Figure 1This is a system diagram illustrating an example of the structure of the information processing system according to the first embodiment.

[0026] Figure 2 This is a diagram showing an outline of the output power control involved in the first embodiment.

[0027] Figure 3 This is a schematic block diagram illustrating an example of the structure of the information processing apparatus according to the first embodiment.

[0028] Figure 4 This is a schematic block diagram illustrating an example of the structure of the AC adapter according to the first embodiment.

[0029] Figure 5 This is a flowchart illustrating an example of the output power control process involved in the first embodiment.

[0030] Figure 6 This is a flowchart illustrating another example of the output power control process involved in the first embodiment.

[0031] Figure 7 This is a schematic block diagram illustrating an example of the structure of the information processing device and AC adapter according to the second embodiment.

[0032] Figure 8 This is a flowchart illustrating an example of the power control processing involved in the second embodiment.

[0033] Explanation of reference numerals in the attached figures

[0034] 10...Information processing device; 20...Battery; 30, 30A...AC adapter; 110...Display unit; 120...USB connector; 130...Input device; 131...Keyboard; 133...Touchpad; 140...Communication unit; 150...Storage unit; 160...EC; 170...System processing unit; 171...CPU; 172...GPU; 173...Memory controller; 174...I / O controller; 175...System memory; 180...Power supply circuit; 185...PD controller; 301...AC power supply measurement circuit; 302...Active filter; 303...Rectifier circuit; 304...Switching circuit; 305...Switching transformer; 306...Smoothing circuit; 307...USB-C interface; 308...Voltage control circuit; 309...PD controller; 310...Backup power supply. Detailed Implementation

[0035] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0036] <First Embodiment>

[0037] First, the first embodiment of the present invention will be described.

[0038] Figure 1 This is a system diagram illustrating an example of the structure of the information processing system involved in this embodiment.

[0039] The illustrated information processing system 1 includes an information processing device 10 and an AC adapter 30. The information processing device 10 is, for example, a clamshell (laptop) PC (Personal Computer). Alternatively, the information processing device 10 could be a tablet PC, a smartphone, etc. The information processing device 10 internally includes a battery 20 (see reference). Figure 3 ).

[0040] For the AC adapter 30 (an example of a power supply device), the plug 31 for insertion into the socket on the input side is connected to the AC socket 50 (main power supply), and the connector 32 on the output side is connected to the information processing device 10. The connector 32 is, for example, a USB-C (USB Type-C) connector (plug side) corresponding to the USB (Universal Serial Bus) 3.1 standard.

[0041] Commercial AC (Alternate Current) power (AC power) is supplied from AC socket 50. AC adapter 30 converts the AC power supplied from AC socket 50 into DC (Direct Current) power (DC power) and supplies it to information processing device 10.

[0042] The information processing device 10 generates power consumed by the loads within the information processing device 10 based on the DC power supplied from the AC adapter 30. The loads within the information processing device 10 are those components (system, display, camera, etc.) that consume power within the information processing device 10, and those consuming power for the battery 20 (see reference 30). Figure 3 (e.g., loads that are charged with electricity)

[0043] Here, AC power supplies, such as those used in airplanes and railways, are subject to location-specific power limitations, sometimes resulting in unstable power. For example, the AC power supplied in trains and airplanes can only provide a limited amount of power (hereinafter referred to as "output power") compared to typical AC power supplies. Therefore, in the information processing system 1 according to this embodiment, the AC adapter 30 detects the state of the AC power on the input side (AC power supply side), and if an unstable state is detected, changes the output power information communicated from the AC adapter 30 to the information processing device 10. This dynamically changes the power used in the information processing device 10.

[0044] Figure 2 This diagram illustrates the general outline of the output power control involved in this embodiment. When the information processing device 10 is activated by the initial output power (e.g., 240W), the AC power supply on the AC power supply side may sometimes become unstable, for example, due to the limitation of the output power in the train's AC power supply (because the output power is relatively small). For example, if the AC adapter 30 detects the AC power supply being cut off multiple times within a specified time, it detects that the state is unstable and changes the output power notified to the information processing device 10 to a smaller value (e.g., 80W). As a result, the information processing device 10 can reduce power consumption according to the notified output power value, and thus, for example, be able to operate stably in the train.

[0045] Furthermore, for example, since the AC power output in an aircraft is more limited compared to that in a train (due to its smaller output power), even when the output power is changed to a smaller value (e.g., 80W), the AC power supply can sometimes become unstable. For instance, if the AC adapter 30 detects multiple AC power interruptions within a specified time while the output power is changed to a smaller value (e.g., 80W), it detects an unstable state and changes the output power to an even smaller value (e.g., 40W). As a result, the information processing device 10 can reduce power consumption based on the notified output power value, and thus, for example, operate stably in an aircraft.

[0046] In addition, the AC power supply inside the aircraft is a specific frequency (e.g., 400Hz) that is different from that in other places. Therefore, it is also possible that if the AC adapter 30 detects that the frequency of the AC power supply is a specific frequency (e.g., 400Hz), even if the AC power supply is not cut off multiple times within a specified time, the output power will be changed to a smaller value (e.g., 40W).

[0047] In addition, if the user plugs or unplugs the connector 32 (USB-C), the AC adapter 30 detects that the connection with the information processing device 10 has been released and returns to the initial output power (e.g., 240W).

[0048] The structure of the information processing system 1 according to this embodiment will be described in detail below.

[0049] [Structure of the information processing device]

[0050] Figure 3 This is a schematic block diagram illustrating an example of the structure of the information processing apparatus 10 according to this embodiment. The information processing apparatus 10 is configured to include a display unit 110, a USB connector 120, an input device 130, a communication unit 140, a storage unit 150, an EC (Embedded Controller) 160, a system processing unit 170, a power supply circuit 180, and a PD controller 185.

[0051] The display unit 110 is configured to include a liquid crystal display (LCD), an organic EL (electroluminescence) display, etc. The display unit 110 displays an image based on display data generated by system processing performed by the system processing unit 170.

[0052] USB connector 120 is a connector used to connect peripheral devices that utilize USB. For example, USB connector 120 is a USB-C connector. By connecting AC adapter 30 to USB connector 120, DC power can be supplied from AC adapter 30. Alternatively, information processing device 10 may also include a USB-A (USB Type-A) connector as USB connector 120.

[0053] Input device 130 is an input unit that accepts user input, and is configured to include, for example, a keyboard 131 and a touchpad 133. Based on the received operations on the keyboard 131 and touchpad 133, input device 130 outputs an operation signal indicating the operation content to EC160.

[0054] The communication unit 140 can be communicatively connected to other devices via a wireless or wired communication network to send and receive various types of data. For example, the communication unit 140 can be configured as a communication device including a wired LAN interface such as Ethernet (registered trademark) and a wireless LAN interface such as Wi-Fi (registered trademark). Alternatively, the communication unit 140 can also be configured to include a USB (Universal Serial Bus) interface and a Bluetooth (registered trademark) interface.

[0055] The storage unit 150 is configured to include storage media such as HDD (Hard Disk Drive), SSD (Solid State Drive), RAM (Random Access Memory), and ROM (Read Only Memory). The HDD or SSD stores various programs such as the operating system, device drivers, and applications, as well as various data obtained through the actions of these programs.

[0056] The EC160 is a microcomputer comprising a CPU, RAM, ROM, and I / O (Input / Output) logic circuits. The EC160's CPU reads the control program pre-stored in its ROM and executes it to perform its functions. For example, the EC160 operates independently of the system processing unit 170, instructing the system processing unit 170 to change its operating state (such as transitioning to startup or standby states) and managing its operating state.

[0057] Furthermore, EC160 is connected to input device 130, power circuit 180, PD controller 185, etc. EC160 sends operation information corresponding to the operation input to input device 130 based on user input. Furthermore, EC160 communicates with power circuit 180 to obtain information about the status of battery 20 (remaining charge, voltage, etc.) and performs charging control when charging battery 20 using power supplied from AC adapter 30. Additionally, EC160 outputs control signals to power circuit 180 to control the supply of system power corresponding to the system's operating state. Furthermore, EC160 controls the power consumed by the load within information processing device 10 based on information obtained from AC adapter 30 via PD controller 185.

[0058] The power supply circuit 180 generates power to be supplied to various parts of the information processing device 10 based on the DC power supplied from the AC adapter 30. Furthermore, the power supply circuit 180 includes a charging circuit that generates charging power to be supplied to the battery 20 based on the DC power supplied from the AC adapter 30. In other words, the power supply circuit 180 generates power consumed by the loads within the information processing device 10 based on the DC power supplied from the AC adapter 30. Additionally, when the AC adapter 30 is not connected, the power supply circuit 180 generates power to be supplied to various parts of the information processing device 10 based on the DC power supplied from the battery 20. For example, the power supply circuit 180 includes a DC / DC converter or the like to convert the voltage of the power supplied from the AC adapter 30 or the battery 20 to a predetermined voltage, generating power to be supplied to various parts such as the system processing unit 170, display unit 110, communication unit 140, storage unit 150, and PD controller 185.

[0059] The PD controller 185 performs control corresponding to USB PD (Power Delivery). When the AC adapter 30 is connected, the PD controller 185 manages the external power supply function powered via the USB VBUS (Power Line United States). For example, the PD controller 185 determines whether the AC adapter 30 is connected to the USB connector 120 by monitoring the VBUS terminal and the CC signal line. Furthermore, the PD controller 185 communicates various information with the AC adapter 30 via the USB CC signal line.

[0060] The system processing unit 170 is configured to include a CPU 171, a GPU (Graphics Processing Unit) 172, a memory controller 173, an I / O (Input-Output) controller 174, and system memory 175. Through system processing based on an operating system (OS), it is able to execute various application software on the OS. Sometimes, the CPU 171 and GPU 172 are collectively referred to as the processor.

[0061] Based on instruction information from EC160, CPU171 controls the transition of system operation states, such as startup and standby (sleep) states. For example, if the system operation state is standby and an instruction to start is input from EC160 according to user operation, CPU171 transitions from standby state to normal operation state. For example, during startup, if power is supplied from power circuit 180 and an instruction to start is input from EC160, CPU171 begins startup processing. During startup processing, CPU171 performs minimal device detection and initialization (pre-start) of system memory 175, storage unit 150, etc. CPU171 loads system firmware from storage unit 150 into system memory 175 and performs detection and initialization of other devices such as communication unit 140, display unit 110, etc. (post-processing). Initialization includes processes such as setting initial parameters. In addition, during the transition from standby state (sleep) to normal operation state (recovery), a part of the post-processing is sometimes omitted. After the boot process is complete, CPU171 begins the execution of OS-based system processing.

[0062] GPU 172 is connected to display unit 110. GPU 172 generates display data by performing image processing under the control of CPU 171. GPU 172 outputs the generated display data to display unit 110. Alternatively, CPU 171 and GPU 172 can be integrated into a single core, or the load can be shared between CPU 171 and GPU 172, which are separate cores. The number of processors is not limited to one; multiple processors are also possible.

[0063] The memory controller 173 controls the reading and writing of data from the system memory 175, storage unit 150, etc., based on the CPU 171 and GPU 172.

[0064] I / O controller 174 controls the input and output of data from communication unit 140, display unit 110 and EC160.

[0065] System memory 175 is used as the read area for the processor's executable program and the job area for writing processing data.

[0066] Here, the system processing unit 170 has an operating mode that reduces power consumption. For example, power consumption can be reduced by lowering the operating frequency of the CPU 171 or by stopping a portion of the processing performed by the CPU 171 (such as background processing). Furthermore, power consumption can also be reduced by lowering the screen brightness of the display unit 110 or by limiting (stopping or intermittently operating) the communication functions based on the communication unit 140. The aforementioned reduction in power consumption can be configured in multiple stages depending on the amount of reduction, and can be controlled, for example, based on instructions from the EC 160.

[0067] For example, EC160 performs control to reduce the power consumed by the load within the information processing device 10 based on information obtained from AC adapter 30. As an example, the information obtained from AC adapter 30 is information indicating the output power that can be supplied from AC adapter 30 to information processing device 10.

[0068] [Structure of AC adapter]

[0069] Next, refer to Figure 4 The structure of the AC adapter 30 sending output power information to the information processing device 10 will be described. Figure 4 This is a schematic block diagram illustrating an example of the structure of the AC adapter 30 according to this embodiment.

[0070] AC adapter 30 includes an AC power measurement circuit 301, an active filter 302, a rectifier circuit 303, a switching circuit 304, a switching transformer 305, a smoothing circuit 306, a USB-C interface 307, a voltage control circuit 308, a PD controller 309, and a backup power supply 310.

[0071] AC power is supplied to the AC adapter 30 from the AC socket 50 by inserting the plug 31 into the AC socket 50. First, the AC power measurement circuit 301 detects the state of the AC power supplied from the AC socket 50. For example, the AC power measurement circuit 301 measures the voltage of the AC power supplied from the AC socket 50 and measures the voltage fluctuations of the AC power. Furthermore, the AC power measurement circuit 301 measures and detects the frequency of the AC power supplied from the AC socket 50. Moreover, the AC power measurement circuit 301 sends information indicating the detection results, such as voltage fluctuations or frequency, of the AC power to the PD controller 309 as information indicating the state of the AC power.

[0072] Furthermore, the AC power supplied from the AC socket 50 is converted into DC power output via an active filter 302, a rectifier circuit 303, a switching circuit 304, a switching transformer 305, a smoothing circuit 306, and a USB-C interface 307. The voltage control circuit 308 detects the output voltage of the DC power and provides feedback control to the switching circuit 304 to make the detected output voltage the target voltage. The DC power output from the USB-C interface 307 is supplied to the information processing device 10 connected to the connector 32 via a USB cable.

[0073] The PD controller 309 performs control corresponding to USB PD (Power Delivery). The PD controller 309 is connected to the AC power measurement circuit 301, the USB-C interface 307, and the voltage control circuit 308. The PD controller 309 communicates with the PD controller 185 on the information processing device 10 side via the USB CC signal line to exchange various power supply related information.

[0074] For example, the PD controller 309 obtains information indicating the state of AC power from the AC power measurement circuit 301. Then, based on the AC power state detection result, the PD controller 309 sends information about the output power (PDO: Power Data Object) that can be supplied from the AC adapter 30 to the information processing device 10.

[0075] Specifically, as referred to Figure 2 As explained, the PD controller 309, for example, if it detects multiple interruptions in the AC power supply within a specified time based on voltage fluctuations in the AC power detected by the AC power measurement circuit 301, changes the output power information (PDO) to a smaller value (e.g., 80W or 40W) and sends it to the information processing device 10. Furthermore, the PD controller 309, for example, if it detects a specific frequency (e.g., 400Hz) in the AC power detected by the AC power measurement circuit 301, changes the output power information (PDO) to a smaller value (e.g., 40W) and sends it to the information processing device 10. Additionally, the PD controller 309, for example, if it detects that the connection between the AC adapter 30 and the information processing device 10 has been disconnected (released), sets the output power to an initial value (e.g., 240W).

[0076] The EC160 of the information processing device 10 obtains the output power information (PDO) from the AC adapter 30 via the PD controller 185. The EC160 controls the power consumed by the load within the information processing device 10, using the power supplied by the AC adapter 30 as indicated by the output power information (PDO) as an upper limit. For example, if the value of the power supplied by the AC adapter 30 is changed to a value smaller than the initial value, the EC160 stabilizes its operation by reducing the power consumed by the load within the information processing device 10.

[0077] For example, to reduce power consumption, EC160 reduces the operating frequency of CPU171 and stops some of the processing performed by CPU171 (such as background processing). Furthermore, EC160 reduces power consumption by reducing the screen brightness of display unit 110 and limiting communication functions based on communication unit 140 (stopping or intermittent operation, etc.). As an example, EC160 can also select an appropriate operating mode from multiple operating modes that are set in stages according to the amount of power consumption reduction, based on output power information (PDO) obtained from AC adapter 30.

[0078] Furthermore, the backup power supply 310 of the AC adapter 30 is provided to provide alternative power when power cannot be supplied to the AC power measurement circuit 301 and the PD controller 309 due to AC power voltage fluctuations. Therefore, the AC adapter 30 can change the output power information (PDO) and send it to the information processing device 10 when it detects multiple AC power outages within a specified time.

[0079] The backup power source 310 is, for example, a high-capacity capacitor (supercapacitor). Alternatively, the backup power source 310 can also be a secondary battery.

[0080] [Actions of output power control processing]

[0081] Next, the operation of output power control processing of AC adapter 30 based on the detection result of AC power status to control the output power information (PDO) sent to information processing device 10 will be explained.

[0082] Figure 5 This is a flowchart illustrating an example of the output power control processing involved in this embodiment. Here, for example, it shows the state where the information processing device 10 and the AC adapter 30 are connected.

[0083] (Step S101) If the plug 31 of the AC adapter 30 is inserted into the AC socket 50, AC power is supplied from the AC socket 50 to the AC adapter 30, and the circuit inside the AC adapter 30 is reset (Power on reset). Then, proceed to the process in step S111.

[0084] (Step S111) The PD controller 309 sets the value of the counter (Fail count) to 0 and proceeds to the processing in step S113.

[0085] (Step S113) The PD controller 309 sets the available output power to an initial value (e.g., 240W) (SetMax power = 240W) and sends the set output power information (PDO) to the information processing device 10. Then, the process proceeds to step S115.

[0086] (Step S115) Based on the detection result of the AC power status by the AC power measurement circuit 301, the PD controller 309 determines whether an AC power cut-off has occurred. If the PD controller 309 determines that no AC power cut-off has occurred (No), it returns to the process of step S113. On the other hand, if the PD controller 309 determines that an AC power cut-off has occurred (Yes), it proceeds to the process of step S117.

[0087] (Step S117) The PD controller 309 increments the value of the counter (Fail count) by 1 and proceeds to the processing in step S119.

[0088] (Step S119) The PD controller 309 determines whether more than N AC power cuts have occurred within a specified time. Specifically, the PD controller 309 determines whether the value of the counter (Fail count) exceeds N. Here, N can be set to any positive integer. If the PD controller 309 finds that the counter value (Fail count) is less than or equal to N (No), it returns to the process in step S113. On the other hand, if the PD controller 309 finds that the counter value (Fail count) exceeds N (Yes), it proceeds to the process in step S121. For example, if N = 4, and the PD controller 309 detects 5 AC power cuts within the specified time, it proceeds to the process in step S121. Furthermore, the specified time can be arbitrarily determined. For example, the specified time can be set to 5 minutes, etc.

[0089] (Step S121) The PD controller 309 resets the value of the counter (Fail count) to 0 and proceeds to the processing of step S123.

[0090] (Step S123) The PD controller 309 determines whether the connection with the information processing device 10 has been cut off (disconnected). For example, if the user unplugs the connector 32 from the information processing device 10, the PD controller 309 determines that the connection with the information processing device 10 has been cut off (disconnected) (Yes) and returns to the process of step S111. On the other hand, if the PD controller 309 determines that the connection with the information processing device 10 has not been cut off (disconnected) (No), it proceeds to the process of step S125.

[0091] (Step S125) The PD controller 309 changes the output power that can be supplied to a value smaller than the initial value (e.g., 80W) (Set Max power = 80W) and sends the information of the changed output power (PDO) to the information processing device 10. Then, the process proceeds to step S127.

[0092] (Step S127) Based on the detection result of the AC power status by the AC power measurement circuit 301, the PD controller 309 determines whether an AC power cut-off has occurred. If the PD controller 309 determines that no AC power cut-off has occurred (No), it returns to the process of step S123. On the other hand, if the PD controller 309 determines that an AC power cut-off has occurred (Yes), it proceeds to the process of step S129.

[0093] (Step S129) The PD controller 309 increments the value of the counter (Fail count) by 1 and proceeds to the processing in step S131.

[0094] (Step S131) ​​The PD controller 309 determines whether more than N AC power cuts have occurred within a specified time. Specifically, the PD controller 309 determines whether the value of the counter (Fail count) exceeds N. Here, N can be set to any positive integer. If the PD controller 309 finds that the counter value (Fail count) is less than or equal to N (No), it returns to the process in step S123. On the other hand, if the PD controller 309 finds that the counter value (Fail count) exceeds N (Yes), it proceeds to the process in step S133. For example, if N = 4, and the PD controller 309 detects 5 AC power cuts within a specified time, it proceeds to the process in step S133. Furthermore, N can be the same value as in step S119 or a different value. Additionally, the specified time can be arbitrarily determined and can be the same value as in step S119 or a different value.

[0095] (Step S133) The PD controller 309 resets the value of the counter (Fail count) to 0 and proceeds to the processing of step S135.

[0096] (Step S135) The PD controller 309 determines whether the connection with the information processing device 10 has been cut off (disconnected). For example, if the user unplugs the connector 32 from the information processing device 10, the PD controller 309 determines that the connection with the information processing device 10 has been cut off (disconnected) (Yes) and returns to the process of step S111. On the other hand, if the PD controller 309 determines that the connection with the information processing device 10 has not been cut off (disconnected) (No), it proceeds to the process of step S137.

[0097] (Step S137) The PD controller 309 changes the available output power to a smaller value (e.g., 40W) (SetMax power = 40W) and sends the changed output power information (PDO) to the information processing device 10. Then, the process proceeds to step S139.

[0098] (Step S139) Based on the detection result of the AC power status by the AC power measurement circuit 301, the PD controller 309 determines whether an AC power cut-off has occurred. If the PD controller 309 determines that no AC power cut-off has occurred (No), it returns to the process of step S135. On the other hand, if the PD controller 309 determines that an AC power cut-off has occurred (Yes), it proceeds to the process of step S141.

[0099] (Step S141) The PD controller 309 increments the value of the counter (Fail count) by 1 and proceeds to the processing in step S143.

[0100] (Step S143) The PD controller 309 determines whether more than N AC power cuts have occurred within a specified time. Specifically, the PD controller 309 determines whether the value of the counter (Fail count) exceeds N. Here, N can be set to any positive integer. If the value of the counter (Fail count) is less than or equal to N (No), the PD controller 309 returns to the process of step S135. On the other hand, if the value of the counter (Fail count) exceeds N (Yes), the PD controller 309 proceeds to the process of step S145. For example, if N = 4, and the PD controller 309 detects 5 AC power cuts within a specified time, it proceeds to the process of step S145. In addition, N can be the same value as in step S119 or step S131, or it can be a different value. Furthermore, the specified time can be arbitrarily determined, and it can be the same value as in step S119 or step S131, or it can be a different value.

[0101] (Step S145) Since the power supply is unstable even when the output power is the value set in step S137 (e.g., 40W) (i.e., even if the power consumption limit of the information processing device 10 is set to 40W), the PD controller 309 notifies the user of the unstable power. The notification method can be any method. For example, the PD controller 309 may notify the information processing device 10 of the unstable power, and the information processing device 10 may display the unstable power condition on the display unit 110. In short, the state in step S145 refers to an environment unsuitable for the use of the information processing device 10.

[0102] In addition, if the AC power supply is not cut off within a specified time (when the AC power is stable), the PD controller 309 resets the value of the counter (Fail count) to 0.

[0103] [Another example of output power control processing actions]

[0104] Next, in Figure 5 The output power control process shown illustrates an example of controlling the output power upon detecting an AC power outage (an unstable AC power state). However, as described above, when the detected AC power frequency is a specific frequency (e.g., 400Hz), its location (e.g., inside an aircraft) can be determined, and the output power can be controlled. Therefore, referring to... Figure 6 An example of an action that incorporates the processing of detecting the frequency of AC power will be explained.

[0105] Figure 6 This is a flowchart illustrating another example of the output power control processing involved in this embodiment. Figure 6 In the middle, to and Figure 5 The corresponding processing methods are labeled with the same reference numerals in the attached figures, and their descriptions are omitted. Figure 6 The output power control processing shown is compared to Figure 5 The output power control process shown differs in that it includes additional steps S103 and S105.

[0106] In step S101, if AC power is supplied from AC socket 50 to AC adapter 30 and the circuit in AC adapter 30 is reset, then the process proceeds to step S103.

[0107] (Step S103) Based on the frequency of the AC power detected by the AC power measurement circuit 301, the PD controller 309 determines whether the AC power supply (main power supply) is at a specific frequency (e.g., 400Hz). If the PD controller 309 determines that the AC power supply (main power supply) is not at a specific frequency (e.g., 400Hz) (No), it proceeds to step S111, and then performs processing with... Figure 5 The same output power control process applies. On the other hand, if the PD controller 309 determines that the AC power supply (main power supply) is at a specific frequency (e.g., 400Hz), it proceeds to step S105.

[0108] (Step S105) The PD controller 309, for example, notifies the user that the aircraft is powered. Any method can be used for notification. For example, the PD controller 309 may notify the information processing device 10 that the aircraft is powered, and the information processing device 10 may display the aircraft's power status on the display unit 110. Then, the process proceeds to step S133. Thus, the PD controller 309 can detect that the AC power (main power) is at an aircraft-specific frequency (e.g., 400Hz) without performing any further processing. Figure 5 Instead of processing, the output power is immediately changed to the value of the aircraft's output power (e.g., 40W) (Set Max power = 40W), and the changed output power information (PDO) is sent to the information processing unit 10.

[0109] As explained above, the information processing system 1 according to this embodiment includes: an information processing device 10; and an AC adapter 30 (an example of a power supply device) that supplies DC power converted from AC power to the information processing device 10. The AC adapter 30 includes a power supply unit (e.g., an active filter 302, a rectifier circuit 303, a switching circuit 304, a switching transformer 305, a smoothing circuit 306, a USB-C interface 307, and a voltage control circuit 308) that converts AC power into DC power and outputs it. In addition, the AC adapter 30 includes: an AC power measurement circuit 301 (an example of a power status detection unit) that detects the status of AC power; and a PD controller 309 (an example of a power information control unit) that sends power information (e.g., output power information) based on the detection result of the AC power measurement circuit 301 to the information processing device 10. The information processing device 10 includes: a power supply circuit 180 (an example of a power supply unit) that generates power consumed by the load within the information processing device 10 based on DC power supplied from the AC adapter 30; and an EC160 (an example of a control unit) that controls the power consumed by the load within the information processing device 10 based on power information (e.g., power output information) sent from the AC adapter 30.

[0110] Therefore, for the information processing system 1, since the AC adapter 30 notifies the information processing device 10 of the power information based on the detection result of the AC power status, and the information processing device 10 controls the power consumed by the load within the information processing device 10 based on the power information notified from the AC adapter 30, it is possible to properly detect whether it is being used in a place with unstable power supply and to make the information processing device 10 operate stably.

[0111] For example, in AC adapter 30, PD controller 309 sends information indicating the output power that can be supplied as power information to information processing device 10 based on the detection result of AC power measurement circuit 301.

[0112] Therefore, for the information processing system 1, since the AC adapter 30 notifies the information processing device 10 of the output power information based on the detection result of the AC power status, the information processing device 10 can reduce the power consumed by the load within the information processing device 10 according to the power that can be supplied from the AC adapter 30. Thus, the information processing system 1 can appropriately detect whether it is being used in a location with unstable power supply and ensure stable operation of the information processing device 10.

[0113] As an example, in AC adapter 30, AC power measurement circuit 301 detects voltage fluctuations in AC power (e.g., AC power interruption). Furthermore, PD controller 309 changes the output power (the power that can be supplied) from its initial value based on the detection results of the AC power measurement circuit 301 on the voltage fluctuations in AC power.

[0114] Therefore, for the information processing system 1, the AC adapter 30 notifies the information processing device 10 of output power information based on voltage fluctuations in the AC power (e.g., AC power interruption). Thus, the information processing device 10 can reduce the power consumed by its load based on the power available from the AC adapter 30. Consequently, the information processing system 1 can appropriately detect whether it is being used in a location with unstable power and ensure stable operation of the information processing device 10.

[0115] Alternatively, in the AC adapter 30, the AC power measurement circuit 301 detects the frequency of the AC power. Furthermore, the PD controller 309 changes the output power (the power that can be supplied) from its initial value based on the detection result of the AC power measurement circuit 301 on the frequency of the AC power.

[0116] Therefore, for the information processing system 1, when the AC power frequency is, for example, the aircraft frequency, the AC adapter 30 informs the information processing device 10 of the aircraft's output power (which is less than the normal power supply), so the information processing device 10 can reduce the power consumed by the load within the information processing device 10 based on the aircraft's output power. Thus, the information processing system 1 can appropriately detect whether it is being used in a location with unstable power and ensure stable operation of the information processing device 10.

[0117] Furthermore, in AC adapter 30, when the connection between AC adapter 30 and information processing device 10 is disconnected, PD controller 309 sets the output power (the power that can be supplied) to the initial value.

[0118] Therefore, when the AC adapter 30 is temporarily disconnected from the information processing device 10, it resets the output power information, thus preventing the unintentional application of the altered output power information when it is used again. For example, when the AC adapter 30 is connected to the information processing device 10 the next time, it can prevent the information processing device 10 from unnecessarily reducing power consumption.

[0119] Furthermore, in the information processing device 10, the EC160 controls the power consumed by the load within the information processing device 10, with the upper limit being the output power (power that can be supplied) represented by the power information (e.g., output power information) sent from the AC adapter 30.

[0120] Therefore, the information processing device 10 controls the power consumed by the load within the information processing device 10, with the power that can be supplied from the AC adapter 30 as the upper limit, and thus can operate stably.

[0121] In addition, the AC adapter 30 has a backup power supply 310, which is used to provide power alternatively when the AC power measurement circuit 301 and PD controller 309 cannot be supplied with power due to voltage fluctuations of the AC power.

[0122] Therefore, for the information processing system 1, the AC adapter 30 can properly detect voltage fluctuations in AC power (e.g., AC power cut-off) and can notify the information processing device 10 of power information based on the detection results.

[0123] Furthermore, the AC adapter 30 (an example of a power supply device) according to this embodiment supplies DC power converted from AC power to the information processing device 10. The AC adapter 30 includes a power supply unit (e.g., an active filter 302, a rectifier circuit 303, a switching circuit 304, a switching transformer 305, a smoothing circuit 306, a USB-C interface 307, and a voltage control circuit 308) that converts AC power into DC power and outputs it. In addition, the AC adapter 30 includes: an AC power measurement circuit 301 (an example of a power status detection unit) that detects the status of AC power; and a PD controller 309 (an example of a power information control unit) that sends power information (e.g., output power information) based on the detection results of the AC power measurement circuit 301 to the information processing device 10.

[0124] Therefore, the AC adapter 30 notifies the information processing device 10 of power information (e.g., output power information) based on the detection result of the AC power status. Thus, the information processing device 10 can control power consumption based on the notified power information. Consequently, the AC adapter 30 can appropriately detect whether it is being used in a location with unstable power and ensure stable operation of the information processing device 10.

[0125] Furthermore, the control method in the information processing system 1, which includes an information processing device 10 and an AC adapter 30 (an example of a power supply device) that supplies DC power converted from AC power to the information processing device 10, according to this embodiment, includes the following steps: the AC adapter 30 converts AC power into DC power and outputs it; the AC power status is detected; and the power information (e.g., output power information) based on the detection result of the AC power status is sent to the information processing device 10. Additionally, the control method in the information processing system 1 includes the following steps: the information processing device 10 generates power consumed by the load within the information processing device 10 based on the DC power supplied from the AC adapter 30; the information processing device 10 acquires power information (e.g., output power information) sent from the AC adapter 30; and the information processing device 10 controls the power consumed by the load within the information processing device 10 based on the acquired power information (e.g., output power information).

[0126] Therefore, for the control method in the information processing system 1, the AC adapter 30 notifies the information processing device 10 of the power information based on the detection result of the AC power status. Based on the power information notified from the AC adapter 30, the information processing device 10 controls the power consumed by the load within the information processing device 10, so it can properly detect whether it is being used in a place with unstable power supply and make the information processing device 10 operate stably.

[0127] Furthermore, the control method in the AC adapter 30 (an example of a power supply device) according to this embodiment includes: the step of the power supply unit converting AC power into DC power and outputting it; the step of the AC power measurement circuit 301 (an example of a power status detection unit) detecting the status of AC power; and the step of the PD controller 309 (an example of a power information control unit) sending power information (e.g., output power information) based on the detection result of the AC power measurement circuit 301 to the information processing device 10.

[0128] Therefore, for the control method in AC adapter 30, power information (e.g., output power information) is notified to information processing device 10 based on the detection result of the AC power status, so information processing device 10 can control power consumption based on the notified power information. Thus, the control method in AC adapter 30 can appropriately detect whether it is being used in a location with unstable power and ensure stable operation of information processing device 10.

[0129] Thus, according to this embodiment, the AC adapter 30 detects whether it is being used in a location with unstable AC power, such as an airplane, and notifies the information processing device 10 of the available output power. Therefore, the information processing device 10 can operate stably using its existing functions, which operate according to the power available from the AC adapter 30 based on the output power information. In other words, according to this embodiment, the information processing device 10 can operate stably even when used in a location with unstable power, without adding any special functions. Therefore, this embodiment can be applied to many common information processing devices, achieving both stable operation and good user convenience.

[0130] <Second Implementation>

[0131] Next, the second embodiment of the present invention will be described.

[0132] In the first embodiment, the AC adapter 30 detects the state of the AC power and, based on the detection result, changes the output power information (PDO) that can be supplied from the AC adapter 30 and notifies the information processing device 10. Alternatively, when the AC power becomes unstable, the AC adapter 30 may notify the information processing device 10, and the information processing device 10 may control the maximum power consumption based on the received notification. Therefore, in the first embodiment, the maximum output power is changed at the AC adapter 30 side, but in this embodiment, an example of changing the maximum power consumption at the information processing device 10 side will be described.

[0133] Reference Figure 7 In this embodiment, the structure of the information processing device 10 and the AC adapter 30A, which control the maximum power consumption to be changed on the information processing device 10 side according to the state of AC power, will be described. Figure 7 This is a schematic block diagram illustrating an example of the structure of the information processing device 10 and the AC adapter 30A according to this embodiment.

[0134] The basic structure of the information processing device 10 according to this embodiment is the same as that according to the first embodiment. Figure 3 The information processing device 10 shown has the same structure, and part of its structure is in Figure 7 As shown in [the image]. Figure 7 In the middle, to and Figure 3 The structural labels corresponding to each part are the same as those in the attached drawings.

[0135] Furthermore, the structure of the AC adapter 30A according to this embodiment is different from that according to the first embodiment. Figure 4The AC adapter 30 shown differs only in that it does not require a backup battery. Here, the parts of the processing performed by the information processing device 10 and the AC adapter 30A that differ from those in the first embodiment will be described.

[0136] If the PD controller 309 obtains information indicating the state of the AC power from the AC power measurement circuit 301, and determines that the AC power has become unstable based on the detection result, it sends information to the information processing device 10 to remind the information processing device 10 of the situation (hereinafter referred to as "power attention information"). For example, if the PD controller 309 determines that the AC power has become unstable (e.g., the voltage drops to a specified value) based on the detection result of the AC power measurement circuit 301 on the voltage variation of the AC power, it sends power attention information to the information processing device 10.

[0137] When sending power alert information from PD controller 309 to information processing device 10, the "power alert information" is defined, for example, in VDM (Vendor Defined Message) transmitted via USB CC signal. PD controller 309 uses the VDM of USB CC signal to send power alert information to PD controller 185 of information processing device 10.

[0138] If the PD controller 185 receives power monitoring information from the AC adapter 30A, it hands the received power monitoring information over to the EC 160. Based on the power monitoring information from the AC adapter 30A, the EC 160 limits the upper limit of power consumption by the load within the information processing device 10. Thus, in the event that the AC power has become unstable, the information processing device 10 can operate stably by reducing power consumption.

[0139] Next, in this embodiment, the following power control processing operation will be described: when the AC power has become unstable, the AC adapter 30A notifies the information processing device 10, and the information processing device 10 controls the change of the maximum power consumption based on the received notification.

[0140] Figure 8 This is a flowchart illustrating an example of the power control processing involved in this embodiment.

[0141] First, the processing procedure for the 30A AC adapter will be explained.

[0142] (Step S201) AC power is supplied from AC socket 50 to AC adapter 30A, and the circuit in AC adapter 30A is reset. Then, the process proceeds to step S203.

[0143] (Step S203) The PD controller 309 obtains the detection result of the AC power status from the AC power measurement circuit 301, and determines whether the AC power has become unstable based on the obtained detection result. For example, the PD controller 309 determines whether the AC power has become unstable based on the detection result of AC power voltage fluctuation, such as whether the voltage has dropped to a predetermined value. If the PD controller 309 determines that the AC power is stable (No), it does not proceed to the process of step S205, but performs the process of step S203 again. On the other hand, if the PD controller 309 determines that the AC power is unstable, that is, if unstable AC power is detected (Yes), it proceeds to the process of step S205.

[0144] (Step S205) The PD controller 309 uses the VDM of the USB CC signal to send an attention message to the PD controller 185 of the information processing device 10. Then, it returns to the processing of step S203.

[0145] Next, the processing operation of the information processing device 10 will be explained.

[0146] (Step S211) If the EC160 experiences a power-on reset or is disconnected (released) from the AC adapter 30A due to the insertion or removal of the USB-C connector 32, the process proceeds to step S213. Additionally, here, if the connection between the information processing device 10 and the AC adapter 30A is disconnected (released), the connection (insertion / removal) is re-established.

[0147] (Step S213) EC160 sets the output power that can be supplied from AC adapter 30A to an initial value (e.g., 240W) (Set Max power = 240W), and controls the power consumed by the load in the information processing device 10 with the set output power value as the upper limit. Then, it proceeds to the processing in step S215.

[0148] (Step S215) EC160 determines whether it has received a power attention message from AC adapter 30A via PD controller 185. If EC160 determines that it has not received a power attention message (No), it returns to step S213. On the other hand, if EC160 determines that it has received a power attention message (Yes), it proceeds to step S217.

[0149] (Step S217) EC160 changes the output power supplied from AC adapter 30A to a value smaller than the initial value (e.g., 80W) (Set Max power = 80W), and uses the changed output power value as the upper limit to control the power consumed by the load in the information processing device 10. Then, it proceeds to the processing in step S219.

[0150] (Step S219) EC160 determines whether it has received a power attention message from AC adapter 30A via PD controller 185. If EC160 determines that it has not received a power attention message (No), it returns to the process of step S217. On the other hand, if EC160 determines that it has received a power attention message (Yes), it proceeds to the process of step S221.

[0151] (Step S221) EC160 changes the output power supplied from AC adapter 30A to a smaller value (e.g., 40W) (Set Max power = 40W), and uses the changed output power value as an upper limit to control the power consumed by the load within the information processing device 10. Then, it proceeds to step S223.

[0152] (Step S223) EC160 determines whether it has received a power attention message from AC adapter 30A via PD controller 185. If EC160 determines that it has not received a power attention message (No), it returns to the process of step S221. On the other hand, if EC160 determines that it has received a power attention message (Yes), it proceeds to the process of step S225.

[0153] (Step S225) EC160 notifies the user of unstable power supply from AC adapter 30A. The notification method can be any method. For example, EC160 may notify the system processing unit 170 of the unstable power situation, and the system processing unit 170 may process the information and display the unstable power situation on the display unit 110. In short, the state at step S225 refers to an environment unsuitable for the use of the information processing device 10.

[0154] As explained above, in this embodiment, in the AC adapter 30A (an example of a power supply device), the PD controller 309 (an example of a power information control unit) sends power information (e.g., power alert information) to the information processing device 10 when it determines that the AC power has become unstable based on the detection result of the AC power measurement circuit 301 (an example of a power status detection unit).

[0155] Therefore, when the AC power becomes unstable, the AC adapter 30A notifies the information processing device 10 of power information (e.g., power alert information). Thus, the information processing device 10, which has been notified of the power information (e.g., power alert information), can operate stably by reducing power consumption.

[0156] For example, in AC adapter 30A, AC power measurement circuit 301 detects voltage fluctuations in the AC power. Furthermore, if PD controller 309 determines that the AC power has become unstable based on the detection results of voltage fluctuations in the AC power by AC power measurement circuit 301, it sends power information (e.g., power alert information) to information processing device.

[0157] Therefore, when the AC power becomes unstable due to voltage fluctuations, the AC adapter 30A notifies the information processing device 10 of power information (e.g., power warning information). Thus, the information processing device 10, which has been notified of the power information (e.g., power warning information), can operate stably by reducing power consumption.

[0158] Furthermore, in the information processing device 10, the EC160 (an example of a control unit) controls the upper limit of the power consumed by the load within the information processing device 10 based on power information (e.g., power attention information) sent from the AC adapter 30A.

[0159] Therefore, the information processing device 10 sets and operates based on the power information (e.g., power alert information) sent from the AC adapter 30A, thus enabling stable operation.

[0160] Furthermore, the AC adapter 30A (an example of a power supply device) according to this embodiment supplies DC power converted from AC power to the information processing device 10. The AC adapter 30A includes a power supply unit (e.g., an active filter 302, a rectifier circuit 303, a switching circuit 304, a switching transformer 305, a smoothing circuit 306, a USB-C interface 307, and a voltage control circuit 308) that converts AC power into DC power and outputs it. In addition, the AC adapter 30A includes: an AC power measurement circuit 301 (an example of a power status detection unit) that detects the status of AC power; and a PD controller 309 (an example of a power information control unit) that, if it is determined based on the detection result of the AC power measurement circuit 301 that the AC power has become unstable, sends power information (e.g., power warning information) based on the determination result to the information processing device 10.

[0161] Therefore, when the AC power becomes unstable, the AC adapter 30A notifies the information processing device 10 of power information (e.g., power warning information), so the information processing device 10, which has been notified of the power information (e.g., power warning information), can operate stably by reducing power consumption.

[0162] Furthermore, the information processing device 10 according to this embodiment receives DC power converted from AC power from the AC adapter 30A (an example of a power supply device). The information processing device 10 includes: a power supply circuit 180 (an example of a power supply unit) that generates power consumed by the load within the information processing device 10 based on the DC power supplied from the AC adapter 30A; and an EC160 (an example of a control unit) that acquires power information (e.g., power monitoring information) from the AC adapter 30A based on the detection results of the AC power status, and controls the upper limit of power consumed by the load within the information processing device 10 based on the acquired power information.

[0163] Therefore, the information processing device 10 sets an upper limit for power consumption based on the power information (e.g., power alert information) obtained from the AC adapter 30A based on the detection results of the AC power status, and thus can operate stably.

[0164] Furthermore, the control method in the AC adapter 30A (an example of a power supply device) according to this embodiment includes: the step of the power supply unit converting AC power into DC power and outputting it; the step of the AC power measurement circuit 301 (an example of a power status detection unit) detecting the status of the AC power; and the step of the PD controller 309 (an example of a power information control unit) sending power information (e.g., power warning information) based on the determination result to the information processing device 10 when it is determined that the AC power has become unstable based on the detection result of the AC power measurement circuit 301.

[0165] Therefore, the control method in AC adapter 30A notifies the information processing device 10 of power information (e.g., power warning information) when the AC power becomes unstable. Thus, the information processing device 10, which has been notified of the power information (e.g., power warning information), can operate stably by reducing power consumption.

[0166] Furthermore, the control method in the information processing apparatus 10 according to this embodiment includes: a step in which the power supply circuit 180 (an example of the power supply unit) generates power consumed by the load within the information processing apparatus 10 based on the DC power supplied from the AC adapter 30A; a step in which the EC160 (an example of the control unit) acquires power information (e.g., power attention information) based on the detection result of the AC power status from the AC adapter 30A; and a step in which the EC160 controls the upper limit of the power consumed by the load within the information processing apparatus 10 based on the acquired power information.

[0167] Therefore, the control method in the information processing device 10 operates by setting an upper limit for power consumption based on power information (e.g., power awareness information) obtained from the AC adapter 30A based on the detection result of the AC power status, and thus can operate stably.

[0168] Thus, according to this embodiment, the backup power supply 310 provided by the AC adapter 30 in the first embodiment is not required to send a notification from the AC adapter 30A to the information processing device 10 when the AC power becomes unstable. Therefore, stable operation can be achieved by reducing power consumption by triggering a notification on the information processing device 10 side, and the situation of AC power cut-off (interruption) can be suppressed.

[0169] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the specific structure is not limited to the above embodiments and may include designs that do not depart from the spirit of the present invention. For example, the structures described in the above embodiments can be arbitrarily combined.

[0170] In addition, in the above embodiment, an example is shown in which the AC adapter 30 (30A) is connected to the information processing device 10 via the USB connector 120 (USB-C connector), but the connection method is not limited to this.

[0171] Furthermore, the output power value of the AC adapter 30 (30A) illustrated in the above embodiment (e.g., 240W, 80W, 40W) is an example and can be set to any value.

[0172] Furthermore, the aforementioned information processing apparatus 10 has an internal computer system. Moreover, programs for implementing the functions of each structure of the information processing apparatus 10 can be recorded on a computer-readable recording medium, and the computer system can read and execute the program recorded on the recording medium, thereby performing the processing in each structure of the information processing apparatus 10. Here, "reading and executing the program recorded on the recording medium by the computer system" includes installing the program into the computer system. The "computer system" referred to here includes hardware such as an operating system and peripheral devices. Furthermore, the "computer system" may also include multiple computer devices connected via a network including communication lines such as the Internet, WAN, LAN, and dedicated lines. Furthermore, "computer-readable recording medium" refers to removable media such as floppy disks, optical disks, ROMs, and CD-ROMs, and storage devices such as hard disks built into the computer system. Thus, the recording medium storing the program can also be a non-temporary recording medium such as a CD-ROM.

[0173] Furthermore, the recording medium may also include internal or external recording media accessible from a distribution server for distributing the program. Alternatively, it may be a structure where the program is divided into multiple parts and downloaded at different times, and then the various components of the information processing device 10 are combined, with the server distributing the divided parts of the program being different. Moreover, the "computer-readable recording medium" also includes a structure that holds the program for a certain period of time, such as the volatile memory (RAM) inside the computer system that acts as the server and client in the case of sending the program via a network. Furthermore, the program described above may also be used to implement a portion of the above-described functions. It may also be a program that can implement the above-described functions by combining with a program already recorded in the computer system, i.e., a so-called differential file (differential program).

[0174] Furthermore, some or all of the functions of the information processing apparatus 10 in the above embodiments can be implemented as integrated circuits such as LSI (Large Scale Integration). Each function can be processorized separately, or some or all can be integrated and processorized. Moreover, the method of integrated circuit implementation is not limited to LSI; it can also be implemented using dedicated circuits or general-purpose processors. Furthermore, if advancements in semiconductor technology lead to integrated circuit technologies that replace LSI, integrated circuits based on such technologies can also be used.

Claims

1. An information processing system comprising: an information processing device; and a power supply device for supplying DC power converted from AC power to the information processing device. The information processing system is characterized in that... The power supply device includes: The power supply unit converts the AC power into the DC power and outputs it. The power status detection unit detects the status of the AC power. as well as The power information control unit sends power information based on the detection results of the power status detection unit to the information processing device. The information processing device includes: The power supply unit generates power consumed by the load within the information processing device based on the DC power supplied from the power supply device. and The control unit controls the power consumed by the load within the information processing device based on the power information sent from the power supply device.

2. The information processing system according to claim 1, characterized in that, In the power supply device, Based on the detection results of the power status detection unit, the power information control unit sends information indicating the available power supply as the power information to the information processing device.

3. The information processing system according to claim 2, characterized in that, In the power supply device, The power status detection unit detects voltage fluctuations in the AC power. The power information control unit changes the available power supply from its initial value based on the power status detection unit's detection results of voltage fluctuations in the AC power.

4. The information processing system according to claim 2, characterized in that, In the power supply device, The power status detection unit detects the frequency of the AC power. The power information control unit changes the available power supply from the initial value based on the power status detection unit's detection result of the AC power frequency.

5. The information processing system according to claim 3 or 4, characterized in that, In the power supply device, When the connection between the power supply device and the information processing device is disconnected, the power information control unit sets the available power to an initial value.

6. The information processing system according to claim 2, characterized in that, In the information processing device, The control unit controls the power consumed by the load within the information processing device, with the power supply information sent from the power supply device as the upper limit.

7. The information processing system according to claim 2, characterized in that, The power supply device has a backup power supply, which is used to provide power alternatively when the AC power cannot supply power to the power status detection unit and the power information control unit due to voltage fluctuations.

8. The information processing system according to claim 1, characterized in that, In the power supply device, If the power information control unit determines that the AC power has become unstable based on the detection result of the power status detection unit, the power information control unit will send the power information to the information processing device.

9. The information processing system according to claim 8, characterized in that, In the power supply device, The power status detection unit detects voltage fluctuations in the AC power. When the power information control unit determines that the AC power has become unstable based on the detection result of the voltage change of the AC power by the power status detection unit, the power information control unit sends the power information to the information processing device.

10. The information processing system according to claim 8 or 9, characterized in that, In the information processing device, The control unit controls the upper limit of power consumed by the load in the information processing device based on the power information sent from the power supply device.

11. A power supply device for supplying DC power converted from AC power to an information processing device. The power supply device is characterized by having: The power supply unit converts the AC power into the DC power and outputs it. The power status detection unit detects the status of the AC power; and The power information control unit, based on the detection results of the power status detection unit, sends power information indicating the available power supply to the information processing device.

12. A power supply device for supplying DC power converted from AC power to an information processing device. The power supply device is characterized by having: The power supply unit converts the AC power into the DC power and outputs it. The power status detection unit detects the status of the AC power; and If the power information control unit determines that the AC power has become unstable based on the detection result of the power status detection unit, it sends power information based on the determination result to the information processing device.

13. An information processing apparatus that receives DC power converted from AC power from a power supply device. The information processing device is characterized by having: The power supply unit generates power consumed by the load within the information processing device based on the DC power supplied from the power supply device; and The control unit acquires power information from the power supply device based on the detection results of the AC power status, and controls the upper limit of power consumed by the load in the information processing device based on the acquired power information.

14. A control method, which is a control method in an information processing system, the information processing system comprising: an information processing device; The power supply device will supply DC power converted from AC power to the information processing device. The control method is characterized in that... The steps include: the power supply device converting the AC power into the DC power and outputting it; the power supply device detecting the state of the AC power; and the power supply device sending power information based on the detection result of the AC power state to the information processing device. It includes: the step of the information processing device generating power consumed by the load within the information processing device based on the DC power supplied from the power supply device; the step of the information processing device acquiring power information sent from the power supply device; and the step of the information processing device controlling the power consumed by the load within the information processing device based on the acquired power information.

15. A control method, which is a control method in a power supply device, wherein the power supply device supplies DC power converted from AC power to an information processing device. The control method is characterized by including: The step of the power supply unit converting the AC power into the DC power and outputting it; The steps of the power status detection unit detecting the status of the AC power; as well as The step of the power information control unit sending power information indicating the available power supply to the information processing device based on the detection results of the power status detection unit.

16. A control method, which is a control method in a power supply device, wherein the power supply device supplies DC power converted from AC power to an information processing device. The control method is characterized by including: The step of the power supply unit converting the AC power into the DC power and outputting it; The steps of the power status detection unit detecting the status of the AC power; as well as The step of the power information control unit sending power information based on the determination result to the information processing device when the power status detection unit determines that the AC power has become unstable.

17. A control method, which is a control method in an information processing device, wherein the information processing device receives a supply of DC power converted from AC power from a power supply device. The control method is characterized by having: The step of the power supply unit generating power consumed by the load within the information processing device based on the DC power supplied from the power supply device; The step of the control unit obtaining power information from the power supply device based on the detection results of the AC power status; as well as The control unit controls the upper limit of power consumption by the load within the information processing device based on the acquired power information.

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