Electronic equipment and control methods for electronic equipment

Abstract

The present invention provides an electronic device and a control method for the electronic device that can reduce the power consumption of the battery in a shutdown or hibernation state. [Solution] The electronic device comprises a switch and a controller. The switch is connected to ground and can be switched between an on state and an off state. When the AC adapter is not connected to the electronic device and the power state of the electronic device is a shutdown state or a hibernation state, the controller outputs a control signal to the battery's control terminal to stop the battery from outputting power to the electronic device. When the state of the switch changes from the off state to the on state while the battery is stopped from outputting the power to the electronic device, the ground and the control terminal are electrically connected, and the ground voltage is input to the control terminal, causing the battery to start outputting the power to the electronic device.

Description

[[Technical Field]]

[0001] The present invention relates to an electronic device and a control method for an electronic device. [[Background Art]]

[0002] ACPI (Advanced Configuration and Power Interface) is one of the standard specifications relating to power management for computers (see, for example, Patent Document 1). In ACPI, power states (S0 to S5) of a device are defined. General power states defined by ACPI are as follows. In S0, the computer is in an operating state; in S1 and S2, the computer is in a standby state. In S3, the computer is in a sleep (standby) state; in S4, the computer is in a hibernation state. In S5, the computer is in a shutdown state.

[0003] When a computer is in a shutdown state or a hibernation state, in order to minimize standby power consumption, power is supplied to an embedded controller (EC) and a power supply circuit for supplying power to the EC, and no power is supplied to other circuits. [[Prior Art Documents]] [[Patent Documents]]

[0004] [[Patent Document 1]] Japanese Unexamined Patent Publication No. 2023-047293 [[Summary of the Invention]] [[Problem to be Solved by the Invention]]

[0005] Since the EC and the power supply circuit for the EC consume power in the shutdown state or the hibernation state, the remaining battery power is exhausted during long-term storage of the computer.

[0006] The present invention aims to provide an electronic device and a control method for such an electronic device that can reduce the power consumption of a battery in a shutdown or hibernation state. [Means for solving the problem]

[0007] One aspect of the present invention is an electronic device that operates using power output from a battery, comprising a switch connected to ground and capable of switching between an on state and an off state, and a controller electrically connected to the control terminal of the battery, wherein when an AC adapter is not connected to the electronic device and the power state of the electronic device is in a shutdown state or a hibernation state, the controller outputs a control signal to the control terminal to cause the battery to stop outputting power to the electronic device, and when the state of the switch changes from the off state to the on state while the battery has stopped outputting the power to the electronic device, the ground and the control terminal are electrically connected and the ground voltage is input to the control terminal, causing the battery to start outputting the power to the electronic device.

[0008] In one embodiment of the present invention, when the state of the switch changes from the off state to the on state while the battery is outputting power, the ground and the controller may be electrically connected and the ground voltage may be input to the controller, and when the ground voltage is input to the controller and the power state of the electronic device is the shutdown state or the hibernation state, the controller may start the electronic device.

[0009] An electronic device according to one aspect of the present invention may include a first signal line for electrically connecting the controller and the switch, and a second signal line for electrically connecting the control terminal and the switch, wherein the switch may include a first terminal connected to the first signal line and the second signal line, and a second terminal to which the ground voltage is input, wherein when the battery is outputting power, a power supply voltage higher than the ground voltage is applied to the first signal line, and when the state of the switch changes from the off state to the on state while the battery is outputting power, the ground voltage may be input to the controller via the first signal line.

[0010] An electronic device according to one aspect of the present invention may include a rectifier element connected to the first signal line and the second signal line, which allows current to pass from the second signal line to the first signal line and blocks current from the first signal line to the second signal line.

[0011] In one embodiment of the present invention, when the ground voltage is input to the controller, the power state of the electronic device is the shutdown state or the hibernation state, and the AC adapter is not connected to the electronic device, the controller may start the electronic device.

[0012] One aspect of the present invention is a method for controlling an electronic device that operates using power output from a battery, wherein when an AC adapter is not connected to the electronic device and the power state of the electronic device is in a shutdown or hibernation state, a control signal is output to the battery's control terminal to stop the battery from outputting power to the electronic device, and when the state of a switch connected to ground and capable of switching between an on state and an off state changes from the off state to the on state, the ground and the control terminal are electrically connected and a ground voltage is input to the control terminal, thereby causing the battery to start outputting power to the electronic device. [Effects of the Invention]

[0013] According to the above-described aspect of the present invention, the power consumption of the battery in a shutdown or hibernation state can be reduced. [Brief explanation of the drawing]

[0014] [Figure 1] This figure shows an example of the main hardware configuration of a PC according to an embodiment of the present invention. [Figure 2] This figure shows an example of a hardware configuration related to power control in an embodiment of the present invention. [Figure 3] This figure shows an example of the battery hardware configuration in an embodiment of the present invention. [Figure 4] This figure shows an example of the voltage of a signal line connected to a battery in an embodiment of the present invention. [Figure 5] This diagram shows the user's operation, the PC's power status, and the processing performed by the EC in an embodiment of the present invention. [Figure 6] This diagram shows the user's operation, the PC's power status, and the processing performed by the EC in an embodiment of the present invention. [Figure 7] This diagram shows the user's operation, the PC's power status, and the processing performed by the EC in an embodiment of the present invention. [Modes for carrying out the invention]

[0015] Embodiments of the present invention will be described below with reference to the drawings.

[0016] FIG. 1 is a diagram illustrating an example of a main hardware configuration of a PC 1 according to the present embodiment. The PC 1 is a notebook-type PC. As shown in FIG. 1, the PC 1 includes a CPU 11, a main memory 12, a video subsystem 13, a display unit 14, a chipset 21, a BIOS memory 22, an SSD 23, an audio system 24, a communication unit 25, a USB connector 26, an imaging unit 27, an embedded controller (EC) 31, an input unit 32, and a power supply circuit 33. In the present embodiment, the CPU 11 and the chipset 21 correspond to the main control unit 10.

[0017] A CPU (Central Processing Unit) 11 executes various arithmetic processes under program control, and controls the entire PC 1. The main memory 12 is a writable memory used as a read area for an execution program of the CPU 11 or as a work area for writing processing data of the execution program. The main memory 12 is constituted by, for example, a plurality of DRAM (Dynamic Random Access Memory) chips. The execution program includes an OS (Operating System), various drivers, various services / utilities, application programs, and the like.

[0018] The video subsystem 13 is a subsystem for realizing functions related to image display, and includes a video controller. The video controller processes a drawing command from the CPU 11, writes the processed drawing information into a video memory, reads the drawing information from the video memory, and outputs the drawing information as drawing data (display data) to the display unit 14. The display unit 14 is, for example, a liquid crystal display, and displays a display screen based on the drawing data (display data) output from the video subsystem 13.

[0019] The chipset 21 includes controllers such as those for USB (Universal Serial Bus), serial ATA (AT Attachment), SPI (Serial Peripheral Interface) bus, PCI (Peripheral Component Interconnect) bus, PCI-Express bus, and LPC (Low Pin Count) bus, to which a plurality of devices are connected. In FIG. 1, as examples of devices, a BIOS memory 22, an SSD 23, an audio system 24, a communication unit 25, a USB connector 26, and an imaging unit 27 are connected to the chipset 21. The chipset 21 also has an RTC (Real Time Clock) function.

[0020] The BIOS (Basic Input Output System) memory 22 is formed of, for example, an electrically rewritable non-volatile memory such as an EEPROM (Electrically Erasable Programmable Read Only Memory) or a flash ROM. The BIOS memory 22 stores a BIOS, and also stores system firmware and the like for controlling an EC 31 and the like.

[0021] The SSD (Solid State Drive) 23, which is an example of a non-volatile storage device, stores an OS, various drivers, various services / utilities, application programs, and various data. The audio system 24 records, reproduces, and outputs sound data. An HDD (Hard Disk Drive) may be used instead of the SSD.

[0022] The communication unit 25 connects to a communication network via a wireless LAN (Local Area Network) or a wired LAN and performs data communication. The communication unit 25 may also include communication devices that perform wireless communication such as Bluetooth®. For example, the communication unit 25 can communicate with Bluetooth®-compatible wireless mice and wireless keyboards using Bluetooth®.

[0023] The USB connector 26 is a connector for connecting peripheral devices that use USB. The imaging unit 27 is a webcam that captures images. The imaging unit 27 is connected to the chipset 21, for example, via a USB interface.

[0024] EC31 is a one-chip microcomputer that monitors and controls various devices (peripherals and sensors, etc.) regardless of the system state of PC1. EC31 also has a power management function that controls the power supply circuit 33. EC31 consists of a CPU, ROM, and RAM (not shown), and is equipped with multiple A / D input terminals, D / A output terminals, a timer, and digital input / output terminals. For example, the input section 32 and the power supply circuit 33 are connected to EC31 via these input / output terminals, and EC31 controls their operation.

[0025] The input section 32 is, for example, an input device such as a keyboard, pointing device, and touchpad. The power supply circuit 33 includes, for example, a DC / DC converter, a charge / discharge unit, and an AC adapter, and converts the DC voltage supplied from the AC adapter or battery 34 into the multiple voltages necessary to operate the PC1. The power supply circuit 33 also supplies power to each part of the PC1 based on control from EC31.

[0026] Figure 2 shows an example of a hardware configuration for power control. EC31, battery 34, diode 35, diode 36, switch 37, resistor R1, and AC adapter 38 are shown in Figure 2.

[0027] The power output from battery 34 is input to EC31 via the circuit in power supply circuit 33. EC31 operates on the power supplied by battery 34. When AC adapter 38 is connected to PC1, EC31 operates on the power supplied by AC adapter 38.

[0028] Diodes 35 and 36 are examples of rectifier elements. Diodes 35 and 36 allow current to pass from the anode to the cathode and block current from the cathode to the anode. The anodes of EC31 and diode 35 are electrically connected by signal line SL1. One end of resistor R1 is connected to signal line SL1, and the other end of resistor R1 is connected to the power supply. A power supply voltage higher than the ground voltage is input to the other end of resistor R1. The anodes of battery 34 and diode 36 are electrically connected by signal line SL2. Additionally, EC31 is connected to signal line SL2 via a switch (not shown).

[0029] The cathode of diode 35 is connected to signal line SL3, and the cathode of diode 36 is connected to signal line SL4. Signal lines SL3 and SL4 are electrically connected to terminal 37a of switch 37 via signal line SL5. Signal lines SL1, SL3, and SL5 constitute a first signal line. Signal lines SL2, SL4, and SL5 constitute a second signal line.

[0030] Switch 37 is included in the power button located on PC1. Terminal 37a of switch 37 is connected to signal line SL5. Terminal 37b of switch 37 is connected to ground, and the ground voltage is input to terminal 37b.

[0031] When the user is not pressing the power button, the switch 37 is in the off state, and terminals 37a and 37b are isolated from each other. When the user is pressing the power button, the switch 37 is in the on state, and terminals 37a and 37b are electrically connected to each other.

[0032] Battery 34 has a battery cutoff function that stops the output of power. EC31 controls the on / off state of the battery cutoff function in battery 34 by outputting the control signal SYS_CTL to the signal line SL2. When the voltage of the control signal SYS_CTL is low, battery 34 outputs power. When the voltage of the control signal SYS_CTL is floating voltage, battery 34 stops outputting power.

[0033] When PC1 is in a state other than shutdown or hibernation (for example, running), EC31 sets the voltage of the control signal SYS_CTL to a low voltage (ground voltage). At this time, battery 34 does not stop outputting power.

[0034] The power supply voltage is applied to signal line SL1 via resistor R1. The power supply voltage is input to the cathode of diode 36 via signal line SL1, diode 35, signal line SL3, and signal line SL4. Due to the rectification function of diode 36, the power supply voltage is not applied to signal line SL2, and the control signal SYS_CTL is not affected by the power supply voltage applied to signal line SL1.

[0035] When the AC adapter 38 is connected to PC1 and the PC1 enters a shutdown or hibernation state, EC31 maintains the voltage of the control signal SYS_CTL at a low voltage, and the battery 34 continues to output power. Subsequently, when the user presses the power button, the switch 37 is turned ON. At this time, signal line SL1 is connected to ground via diode 35, signal lines SL3 and SL5, and switch 37, and the voltage of signal line SL1 is forced to a low voltage (ground voltage). EC31 detects that the voltage of signal line SL1 has changed from the power supply voltage to a low voltage and determines that the power button has been pressed. EC31 then starts the PC1 system, i.e., the OS.

[0036] When the AC adapter 38 is not connected to PC1 and the power state of PC1 is shut down or hibernating, EC31 sets the voltage of the control signal SYS_CTL to a floating voltage. Battery 34, which receives the control signal SYS_CTL, stops outputting power. EC31 stops operating. Switch 37 is in the off state, and the voltage of signal line SL2 is a floating voltage.

[0037] Subsequently, when the user presses the power button, the switch 37 is turned ON. At this time, signal line SL2 is connected to ground via diode 36, signal line SL4, signal line SL5, and switch 37, and the voltage of signal line SL2 is forced to Low voltage (ground voltage). Battery 34, which has a Low voltage input, begins to output power.

[0038] Power is supplied to EC31 from battery 34, and EC31 starts up. EC31 starts the system on PC1. After EC31 has started up, EC31 may start the system on PC1 again when the user presses the power button again. After EC31 has started up, EC31 maintains the voltage of the control signal SYS_CTL at a low voltage, and battery 34 continues to output power.

[0039] Figure 3 shows an example of the hardware configuration of the battery 34. The battery 34 comprises multiple battery cells 340, a switch 341, and a BMU (Battery Management Unit) 342.

[0040] The negative terminal of one battery cell 340 is connected to the negative terminal TE1. The positive terminal of the other battery cell 340 is connected to switch 341. Switch 341 is connected to the positive terminal and positive terminal TE2 of battery cell 340.

[0041] When switch 341 is in the ON state, power is output from multiple battery cells 340 to EC31, etc. When switch 341 is in the OFF state, power output from multiple battery cells 340 stops. The state of switch 341 is controlled by BMU 342.

[0042] The BMU342 is connected to terminals TE3 and TE4. The BMU342 communicates with the circuitry in PC1 via terminal TE3. Terminal TE4 is connected to signal line SL2. The control signal SYS_CTL output from EC31 is input to the BMU342 via terminal TE4. When EC31 sets the voltage of the control signal SYS_CTL to a floating voltage, the BMU342 sets the state of switch 341 to the off state and stops the output of power from battery 34.

[0043] Even after battery 34 stops outputting power, the BMU 342 continues to operate using power supplied from multiple battery cells 340. When the voltage at terminal TE4 becomes low, the BMU 342 sets the state of switch 341 to the ON state and starts outputting power from battery 34.

[0044] Figure 4 shows an example of the voltage across signal line SL2. The horizontal axis of the graph in Figure 4 represents time, and the vertical axis of the graph in Figure 4 represents the voltage value.

[0045] The BMU342 intermittently outputs a pulse signal with a high voltage (higher than the low voltage) to the signal line SL2 via terminal TE4, and measures the voltage at terminal TE4. By intermittently outputting the pulse signal, the power consumption of the BMU342 can be reduced.

[0046] When switch 341 is ON and the PC1 system is running, EC31 sets the voltage of the control signal SYS_CTL to Low. The voltage of signal line SL2 is forced to Low. BMU342 continues to output a pulse signal to signal line SL2 and measure the voltage at terminal TE4. BMU342 outputs a pulse signal with a High voltage to signal line SL2, but the voltage at terminal TE4 is maintained at Low. While EC31 maintains the voltage of the control signal SYS_CTL at Low, BMU342 detects Low voltage.

[0047] At timing T1, EC31 detects that the AC adapter 38 is not connected to PC1 and that the power state of PC1 is either shut down or hibernating. Therefore, EC31 sets the voltage of the control signal SYS_CTL to a floating voltage.

[0048] When switch 37 is in the off state, switch 37 is equivalent to a resistor with a very high resistance. When a pulse signal with a high voltage is output from BMU342 to signal line SL2, the voltages on signal lines SL2, SL4, and SL5 become high. When a pulse signal is output to signal line SL2, BMU342 detects a high voltage. Therefore, BMU342 sets the state of switch 341 to the off state.

[0049] The BMU342 continues to output a pulse signal to signal line SL2 and measure the voltage at terminal TE4. When a pulse signal is output to signal line SL2, the BMU342 detects a high voltage. While a pulse signal is output to signal line SL2, the BMU342 determines that the power button is not pressed.

[0050] When the user presses the power button, at timing T2, the state of switch 37 becomes ON, and the voltage of signal line SL2 is forcibly set to Low. The BMU342 outputs a pulse signal with a High voltage to signal line SL2, but the voltage at terminal TE4 is maintained at Low. Therefore, the BMU342 determines that the power button has been pressed and sets the state of switch 341 to ON.

[0051] When the BMU342 outputs a pulse signal with a high voltage to signal line SL2, the high voltage is applied to signal line SL3 via diode 36. If signal line SL1 and signal line SL3 are directly connected without diode 35, the high voltage is applied to signal line SL1. If the high voltage is higher than the power supply voltage applied to signal line SL1 via resistor R1, an overvoltage is applied to EC31. In this embodiment, because of the rectification function of diode 35, the high voltage is not applied to signal line SL1 and no overvoltage is applied to EC31.

[0052] If diode 35 is not installed and a high voltage is applied to the signal line SL1 as described above, latch-up may occur, potentially causing a large current to flow into EC31. In this embodiment, the rectifying function of diode 35 is activated, thus preventing a large current from flowing into EC31.

[0053] When EC31 is stopped, the switch located between EC31 and signal line SL2 is in the off state. When BMU342 outputs a pulse signal with a high voltage to signal line SL2, the high voltage is not input to EC31 via the switch.

[0054] Figures 5 to 7 show an example of user operation, the power status of PC1, and the process executed by EC31. First, let's explain the example shown in Figure 5.

[0055] The AC adapter 38 is connected to PC1, and PC1 is powered on. The battery 34 is outputting power to EC31, etc., and the PC1 system is running (state C10). EC31 monitors the power status of PC1 (step S10).

[0056] When the user shuts down PC1 (operation O10), the power to PC1 is turned off. The PC1 system other than EC31 stops operating (state C11). EC31 detects that the power state of PC1 has changed to a shutdown state (S5) or a hibernation state (S4) (step S10). EC31 monitors the connection status of the AC adapter 38 (step S11).

[0057] When the user unplugs the AC adapter 38 from PC1 (operation O11, state C12), EC31 determines that the AC adapter 38 has been unplugged (step S11). EC31 enables the battery cutoff function by setting the voltage of the control signal SYS_CTL to a floating voltage (step S12). The battery 34 stops outputting power, and EC31 stops operating (state C13).

[0058] In Figure 5, the user shuts down PC1 and then unplugs the AC adapter 38 from PC1. However, the user may also shut down PC1 after unplugging the AC adapter 38 from PC1. After determining that the AC adapter 38 has been unplugged, EC31 may detect that the power state of PC1 has changed to a shutdown state (S5) or a hibernation state (S4).

[0059] Next, we will explain the example shown in Figure 6. After Figure 5, battery 34 remains in a state where it has stopped outputting power, and the power to PC1 is off (state C20). When the user presses the power button (operation O20), the voltage on signal line SL2 becomes low, and battery 34 starts outputting power (state C21). Power is supplied from battery 34 to EC31, and EC31 starts up (state C22).

[0060] The EC31, having started operation, performs initialization and sets the voltage of the control signal SYS_CTL to a low voltage (step S20). The EC31 determines whether the power state of PC1 is in a shutdown state (S5) or a hibernation state (S4) (step S21). Since the power to PC1 is off, the EC31 determines whether the AC adapter 38 has been unplugged from PC1 (step S22).

[0061] If the AC adapter 38 is unplugged from PC1, EC31 turns on the power to PC1 and starts the PC1 system (step S23). Power is supplied from the battery 34 to the main control unit 10, etc., and the PC1 system starts up (state C23).

[0062] In Figure 6, the PC1 system starts up when the user presses the power button once. The process executed by EC31 in Figure 6 may be changed as follows.

[0063] Similar to Figure 6, when the user presses the power button, the battery 34 starts outputting power and the EC31 starts up. If the AC adapter 38 is unplugged from the PC1 in step S22, the EC31 determines whether the power button has been pressed or not. When the user presses the power button again, the state of switch 37 becomes ON. At this time, the voltage of signal line SL1 is forced to Low, and the EC31 determines that the power button has been pressed. The EC31 turns on the power to the PC1 and starts the system of the PC1. In this example, after the battery 34 stops outputting power, the system of the PC1 starts when the user presses the power button twice.

[0064] Next, we will explain the example shown in Figure 7. After Figure 5, the battery 34 remains in a state where it has stopped outputting power, and the PC1 is powered off (state C30). When the user connects the AC adapter 38 to the PC1 (operation O30), power is supplied from the AC adapter 38 to the EC31, and the EC31 starts up (state C32). The EC31, now in operation, performs initialization and sets the voltage of the control signal SYS_CTL to a low voltage (step S30). The battery 34 starts outputting power (state C33).

[0065] EC31 determines whether the power state of PC1 is shut down (S5) or hibernating (S4) (step S31). Since the power to PC1 is off, EC31 determines whether the power button has been pressed (step S32).

[0066] When the user presses the power button (operation O31), the state of switch 37 becomes ON. At this time, the voltage of signal line SL1 is forcibly set to Low, and EC31 determines that the power button has been pressed (step S32). EC31 turns on the power to PC1 and starts the system of PC1 (step S33). Power is supplied from battery 34 to the main control unit 10, etc., and the system of PC1 starts up (state C34).

[0067] In the above embodiment, an example was described in which the electronic device is a notebook PC, but it is not limited to this, and the electronic device may be, for example, a desktop PC or a tablet terminal device.

[0068] As described above, PC1 (electronic device) operates using power output from battery 34. The electronic device includes a switch 37 and an EC31 (controller). Switch 37 is connected to ground and can be switched between an on state and an off state. EC31 is electrically connected to terminal TE4 (control terminal) of battery 34. When the AC adapter 38 is not connected to PC1 and the power state of PC1 is a shutdown or hibernation state, EC31 outputs a control signal SYS_CTL to terminal TE4 to stop the battery 34 from outputting power to PC1. When the state of switch 37 changes from the off state to the on state while battery 34 is not outputting power to PC1, terminal TE4 is electrically connected to ground, and the ground voltage is input to terminal TE4, causing battery 34 to start outputting power to PC1.

[0069] When the state of switch 37 changes from the off state to the on state while battery 34 is outputting power, ground and EC31 are electrically connected, and the ground voltage is input to EC31. When the ground voltage is input to EC31 and the power state of PC1 is in the shutdown or hibernation state, EC31 starts up PC1.

[0070] PC1 includes a first signal line that electrically connects EC31 and switch 37, and a second signal line that electrically connects terminal TE4 and switch 37. Switch 37 includes terminal 37a (first terminal) connected to the first and second signal lines, and terminal 37b (second terminal) to which the ground voltage is input. When battery 34 is outputting power, a power supply voltage higher than the ground voltage is applied to the first signal line. When the state of switch 37 changes from the off state to the on state while battery 34 is outputting power, the ground voltage is input to EC31 via the first signal line.

[0071] PC1 is equipped with a diode 36 (rectifier element). The diode 36 is connected to the first signal line and the second signal line, allowing current to pass from the second signal line to the first signal line and blocking current from the first signal line to the second signal line.

[0072] When ground voltage is input to EC31, the power state of PC1 is in shutdown or hibernation state, and the AC adapter 38 is not connected to PC1, EC31 starts up PC1.

[0073] When the AC adapter 38 is not connected to PC1 and the power state of PC1 is shut down or hibernating, the battery 34 stops outputting power to PC1. Therefore, PC1 can reduce the power consumption of the battery 34 when it is shut down or hibernating.

[0074] If the battery 34 is replaced, the user may press the power button without connecting the AC adapter 38 to the PC1. In this case as well, the EC31 can start the PC1.

[0075] While embodiments of the present invention have been described in detail above with reference to the drawings, the specific configuration is not limited to the embodiments described above, and may include design changes and the like that do not depart from the spirit of the present invention. [Explanation of symbols]

[0076] 1 PC, 10 Main control unit, 11 CPU, 12 Main memory, 13 Video subsystem, 14 Display unit, 21 Chipset, 22 BIOS memory, 23 SSD, 24 Audio system, 25 Communication unit, 26 USB connector, 27 Imaging unit, 31 EC, 32 Input unit, 33 Power supply circuit, 34 Battery, 34 Battery, 35,36 Diode, 37,341 Switch, 37a,37b Terminals, 38 AC adapter, 340 Battery cell, 342 BMU

Claims

1. An electronic device that operates using power output from a battery, A switch connected to ground and capable of switching between on and off states, A controller electrically connected to the control terminals of the aforementioned battery, Equipped with, When the AC adapter is not connected to the electronic device and the power state of the electronic device is in a shutdown or hibernation state, the controller outputs a control signal to the control terminal to stop the battery from outputting power to the electronic device. When the state of the switch changes from the off state to the on state while the battery has stopped outputting power to the electronic device, the ground and the control terminal are electrically connected, and the ground voltage is input to the control terminal, causing the battery to start outputting power to the electronic device. electronic equipment.

2. When the state of the switch changes from the off state to the on state while the battery is outputting power, the ground and the controller are electrically connected, and the ground voltage is input to the controller. When the ground voltage is input to the controller and the power state of the electronic device is the shutdown state or the hibernation state, the controller starts the electronic device. The electronic device according to claim 1.

3. A first signal line electrically connects the controller and the switch, A second signal line electrically connects the control terminal and the switch, Equipped with, The aforementioned switch is A first terminal connected to the first signal line and the second signal line, The second terminal to which the ground voltage is input, Equipped with, When the battery is outputting the power, a power supply voltage higher than the ground voltage is applied to the first signal line. When the state of the switch changes from the off state to the on state while the battery is outputting power, the ground voltage is input to the controller via the first signal line. The electronic device according to claim 2.

4. The system includes a rectifier element connected to the first signal line and the second signal line, which allows current to pass from the second signal line to the first signal line and blocks current from the first signal line to the second signal line. The electronic device according to claim 3.

5. When the ground voltage is input to the controller, the power state of the electronic device is the shutdown state or the hibernation state, and the AC adapter is not connected to the electronic device, the controller starts the electronic device. The electronic device according to claim 2.

6. A method for controlling electronic devices that operate using power output from a battery, When the AC adapter is not connected to the electronic device and the electronic device is in a shutdown or hibernation state, a control signal is output to the battery's control terminal to stop the output of power to the electronic device. When the battery has stopped outputting power to the electronic device, and the state of a switch connected to ground and capable of switching between an on and off state changes from the off state to the on state, the ground and the control terminal are electrically connected, and the ground voltage is input to the control terminal, thereby causing the battery to start outputting power to the electronic device. A method for controlling electronic devices.

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