Electronic device, connection device, device system, and control method

Abstract

Provided is an electronic device including a connector and a power supply circuit. The connector has a plurality of first terminals. The plurality of first terminals are respectively connected to a plurality of second terminals of a connecting device and include: one or more power terminals for supplying DC power to the connecting device; and a detection terminal. The power supply circuit determines, in the case in which the connecting device is connected to the connector, whether a second terminal connected to the detection terminal is a specific terminal among the plurality of second terminals. The power supply circuit supplies DC supply power having a voltage value set on the basis of the determination result to the connecting device via the one or more power terminals of the connector.

Description

[Technical Field]

[0001] The present disclosure generally relates to electronic devices, connection devices, device systems, and control methods. [Background technology]

[0002] Patent Document 1 discloses an input / output circuit, connector, power supply circuit, and internal processing circuit mounted on a smartphone, which is a type of electronic device. The input / output circuit includes a power supply detection circuit, an identification terminal voltage detection circuit, and a control unit. The power supply detection circuit detects external power supply to the power supply terminal. The control unit identifies an accessory device (connected device) connected to the connector based on the detection results by the identification terminal voltage detection circuit and the power supply detection circuit. The identification terminal voltage detection circuit can narrow down candidate accessory devices based on the presence or absence of power supply detected by the power supply detection circuit. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-209902 Summary of the Invention

[0004] In Patent Document 1, it is possible to narrow down candidate accessory devices based on the presence or absence of power supply detected by a power supply detection circuit. However, it is not possible to change the voltage value of the power supplied to the accessory device depending on the accessory device.

[0005] The present disclosure provides an electronic device, a connected device, a device system, and a control method that can set the voltage value of DC power supplied from the electronic device to a connected device to a value that corresponds to the connected device.

[0006] An electronic device according to one aspect of the present disclosure includes a connector and a power supply circuit. The connector has a plurality of first terminals. The plurality of first terminals are respectively connected to a plurality of second terminals of a connecting device and include one or more power supply terminals for supplying DC power to the connecting device and a detection terminal. When a connecting device is connected to the connector, the power supply circuit determines whether a second terminal connected to the detection terminal among the plurality of second terminals is a specific terminal, and supplies DC supply power having a voltage value set based on the determination result to the connecting device via the one or more power supply terminals of the connector.

[0007] A connection device according to one aspect of the present disclosure has a plurality of second terminals respectively connected to a plurality of first terminals of the connector of the electronic device of the above aspect, the plurality of second terminals including one or more input terminals connected to the one or more power supply terminals for receiving the DC supply power from the electronic device, and an identification terminal electrically isolated from the one or more input terminals and connected to the detection terminal as the specific terminal.

[0008] An equipment system according to one aspect of the present disclosure includes the electronic device of the above aspect and a connection device connected to the electronic device. The connection device has a plurality of second terminals connected to the plurality of first terminals of the connector of the electronic device, respectively. The second terminals include one or more input terminals connected to one or more power supply terminals for receiving the DC supply power from the electronic device, and an identification terminal electrically isolated from the one or more input terminals and connected to the detection terminal as a specific terminal.

[0009] A control method according to one aspect of the present disclosure is a control method for supplying DC supply power from an electronic device to a connected device connected to the electronic device. The electronic device includes a connector having a plurality of first terminals, each connected to a plurality of second terminals of the connected device, and including one or more power supply terminals and a detection terminal for supplying DC power to the connected device. The control method includes, when the connected device is connected to the connector, determining whether a second terminal connected to the detection terminal among the plurality of second terminals is a specific terminal, and supplying DC supply power having a voltage value set based on the determination result to the connected device via the one or more power supply terminals of the connector.

[0010] According to an aspect of the present disclosure, the voltage value of the DC power supplied from the electronic device to the connected device can be set to a value corresponding to the connected device. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a block diagram illustrating a configuration example of a device system including an electronic device and a connected device according to an embodiment. [Figure 2] FIG. 2 is a schematic diagram of a connector configuration example of the electronic device of FIG. 1, with some parts omitted. [Figure 3] FIG. 2 is a schematic diagram of an example of the connector configuration of the connection device of FIG. 1, with some parts omitted. [Figure 4] FIG. 2 is an explanatory diagram of an example of the operation of the power supply circuit in the equipment system of FIG. [Figure 5] 2 is a block diagram of an example configuration of a device system including the electronic device of FIG. 1 and a connection device different from the connection device of FIG. 1. [Figure 6] FIG. 6 is an explanatory diagram of an example of the operation of the power supply circuit in the equipment system of FIG. 5. [Figure 7] 2 is a flowchart illustrating an example of the operation of the electronic device of FIG. 1. DETAILED DESCRIPTION OF THE INVENTION

[0012] [1. Embodiment] [1.1 Overview] 1 and 5 are block diagrams of configuration examples of device systems 1 and 1A each including an electronic device 10 according to an embodiment. The device system 1 in Fig. 1 includes the electronic device 10 and a connection device 20, and the device system 1A in Fig. 5 includes the electronic device 10 and a connection device 20A. Either the connection device 20 or the connection device 20A can be alternatively connected to the electronic device 10.

[0013] The electronic device 10 can be used independently. In the present embodiment, the electronic device 10 is a tablet personal computer, but is not limited to this. Examples of the electronic device 10 include general electronic devices such as laptop personal computers, smartphones, tablet terminals, wearable terminals, and game consoles.

[0014] As shown in FIG. 1, electronic device 10 includes connector 11 and power supply circuit 12. Connector 11 has a plurality of first terminals 110. The plurality of first terminals 110 are connected to a plurality of second terminals 210 of connection devices 20 and 20A, respectively. The plurality of first terminals 110 include one or more (two in FIG. 1) power supply terminals 111 for supplying DC power to connection device 20, and a detection terminal 112. When connection device 20 is connected to connector 11, power supply circuit 12 determines whether the second terminal 210 connected to detection terminal 112 among the plurality of second terminals 210 is a specific terminal, and supplies DC supply power having a voltage value determined based on the determination result to connection device 20 via one or more power supply terminals 111 of connector 11.

[0015] Electronic device 10 includes detection terminal 112 on connector 11 connected to connection device 20 or connection device 20A, and determines the voltage value of the DC supply power supplied to connection device 20, 20A based on the result of determining whether second terminal 210 connected to detection terminal 112 is a specific terminal. According to this embodiment, the voltage value of the DC supply power supplied from electronic device 10 to connection device (connection device 20 or connection device 20A) can be set to a value corresponding to the connection device (connection device 20 or connection device 20A).

[0016] The connection device 20 and the connection device 20A are connected to the electronic device 10. The connection device 20 and the connection device 20A are more effectively used when connected to the electronic device 10 than when they are used alone. If the electronic device 10 is the main body, the connection device 20 and the connection device 20A are peripheral devices. The connection device 20 and the connection device 20A are, for example, port replicators (sometimes also called cradles or docking stations). In this embodiment, the connection device 20 and the connection device 20A are the same type of device (port replicators in this embodiment), but the connection device 20 is a new model and the connection device 20A is an older model. As an example, the connection device 20 can use a higher DC supply power than the DC supply power used by the connection device 20A. In this embodiment, the connection device 20 and the connection device 20A are port replicators, but are not limited to this. Examples of the connection device 20 may be peripheral devices that can be connected to general electronic devices such as personal computers, smartphones, tablet devices, wearable devices, and game consoles. Examples of peripheral devices include input / output devices such as pointing devices (keyboards, mice, etc.), display devices (displays, projectors, etc.), audio devices (speakers, sound bars, etc.), and communication devices (antennas).

[0017] 1, the connection device 20 has a plurality of second terminals 210 that are respectively connected to a plurality of first terminals 110 of the connector 11 of the electronic device 10. The plurality of second terminals 210 include one or more (two in FIG. 1) input terminals 211 that are connected to one or more power supply terminals 111 and that receive DC power supply from the electronic device 10, and an identification terminal 212 that is electrically isolated from the one or more input terminals 211 and that is connected to the detection terminal 112 as a specific terminal.

[0018] In this way, connection device 20 includes identification terminal 212 that is connected as a specific terminal to detection terminal 112 among the plurality of second terminals 210 connected to electronic device 10. According to this embodiment, the voltage value of the DC supply power supplied from electronic device 10 to connection device 20 can be set to a value corresponding to connection device 20.

[0019] [1.2 Details] The equipment system 1 will be described below with reference to Fig. 1 to Fig. 7. The equipment system 1 includes an electronic device 10 and a connection device 20, as shown in Fig. 1.

[0020] [1.2.1 Electronic equipment] As shown in FIG. 1, electronic device 10 includes connector 11, power supply circuit 12, processing unit 13, input / output unit 14, battery 15, power supply circuit 16, power conversion circuit 17, external connection terminal 18, and power supply path 19.

[0021] The connector 11 is used to connect the electronic device 10 to the connection device 20 or the connection device 20A. That is, the connector 11 enables the connection device 20 or the connection device 20A to be connected to the electronic device 10.

[0022] As shown in FIG. 1, the connector 11 includes a plurality of first terminals 110. The plurality of first terminals 110 includes one or more (two in FIG. 1) power supply terminals 111, a detection terminal 112, one or more (three in FIG. 1) power receiving terminals 113, and a pair of ground terminals 114. The power supply terminal 111 is used to supply DC power of a voltage value corresponding to the connection device 20 to the connection device 20. The detection terminal 112 is used to detect the type of the connection device 20. The power receiving terminal 113 is used to receive DC power of a specified voltage value from the connection device 20. The specified voltage value is, for example, 16 V. The plurality of first terminals 110 may further include one or more terminals for detecting connection of the connection device 20 or the connection device 20A, one or more terminals for detecting connection of the electronic device 10, one or more communication terminals, and a plurality of additional ground terminals. The communication terminals may be terminals for UART communication or USB communication.

[0023] 2 is a schematic diagram of an example configuration of the connector 11 of the electronic device 10 of FIG. 1, with some parts omitted. FIG. 2 shows two power supply terminals 111, a detection terminal 112, three power receiving terminals 113, and two ground terminals 114 among the multiple first terminals 110. The two power supply terminals 111, the detection terminal 112, the three power receiving terminals 113, and the pair of ground terminals 114 are contact terminals shaped to be connected to the corresponding second terminals 210 by contact. In this embodiment, the two power supply terminals 111, the detection terminal 112, the three power receiving terminals 113, and the pair of ground terminals 114 are rectangular flat plate-shaped. The two power supply terminals 111, the detection terminal 112, the three power receiving terminals 113, and the pair of ground terminals 114 are arranged in a row. The width direction (left-right direction in FIG. 2) of the power supply terminal 111, the detection terminal 112, and the power receiving terminal 113 coincides with the direction (left-right direction in FIG. 2) in which the power supply terminal 111, the detection terminal 112, and the power receiving terminal 113 are arranged. The distance d between the power supply terminal 111, the detection terminal 112, and the power receiving terminal 113 is narrower than the width w of the power supply terminal 111, the detection terminal 112, and the power receiving terminal 113.

[0024] More specifically, the two power supply terminals 111, the detection terminal 112, and the three power receiving terminals 113 are aligned in a row, with the detection terminal 112 located between the two power supply terminals 111 and the three power receiving terminals 113. As described above, the plurality of first terminals 110 includes a pair of ground terminals 114, which are located on both sides of the two power supply terminals 111, the detection terminal 112, and the three power receiving terminals 113 that are aligned in a row.

[0025] In this embodiment, all first terminals 110 are contact terminals shaped to connect to corresponding second terminals 210 by contact, the width direction of all first terminals 110 coincides with the direction in which the first terminals 110 are arranged, and the spacing d between the first terminals 110 is narrower than the width w of each first terminal 110.

[0026] The external connection terminal 18 is used to connect an external power source to the electronic device 10. The external power source is, for example, an AC adapter that converts AC power from a commercial AC power source into DC power of a specified voltage. As described above, the specified voltage is, for example, 16 V.

[0027] The power supply path 19 is used to transmit DC power of a specified voltage value inside the electronic device 10. The power supply path 19 is connected to the power receiving terminal 113 of the connector 11 and the external connection terminal 18. Therefore, the power supply path 19 can receive DC power of a specified voltage value from the power receiving terminal 113 of the connector 11 and the external connection terminal 18. As shown in FIG. 1 , the power supply path 19 is provided with a diode D11 for preventing backflow from the power supply path 19 to the power receiving terminal 113 and a diode D12 for preventing backflow from the power supply path 19 to the external connection terminal 18.

[0028] The processing unit 13 and the input / output unit 14 determine the functions of the electronic device 10. In other words, the configurations of the processing unit 13 and the input / output unit 14 are determined depending on the functions required of the electronic device 10. That is, the processing unit 13 and the input / output unit 14 are appropriately selected depending on the functions required of the electronic device 10. In FIG. 1, the processing unit 13 includes a processing circuit 131, a storage device 132, and a communication circuit 133. However, the processing unit 13 is not limited to these. The processing circuit 131 includes circuit elements capable of executing specific processes, such as a CPU, a microcomputer, a hub, and a video conversion IC. The storage device 132 includes secondary storage devices such as a hard disk, an SSD, and a CD-ROM, or other forms of non-transitory computer-readable storage devices such as RAM or ROM. The communication circuit 133 includes a wireless communication module, etc. In FIG. 1, the input / output unit 14 includes a display 141, a camera 142, and a connector 143. However, the input / output unit 14 is not limited to these. Examples of the connector 143 include a connector for a LAN cable and a connector conforming to the USB standard.

[0029] The battery 15 is used to operate the electronic device 10. The battery 15 is capable of being charged and discharged. In the present embodiment, the battery 15 is removable. Therefore, the electronic device 10 may not include the battery 15 as a component.

[0030] The power supply circuit 16 controls the charging and discharging of the battery 15. The power supply circuit 16 charges the battery 15 based on DC power of a specified voltage value obtained from a power supply line 19. The power supply circuit 16 converts the DC power from the battery 15 into DC power of a specified voltage value and supplies it to the power supply line 19.

[0031] The power conversion circuit 17 generates DC power of a voltage value (e.g., 5 V) required by the processing unit 13 based on DC power of a specified voltage value obtained from the power supply line 19, and outputs the generated power to the processing unit 13. The power conversion circuit 17 generates DC power of a voltage value (e.g., 5 V, 9 V, 15 V, etc.) required by the input / output unit 14 based on DC power of a specified voltage value obtained from the power supply line 19, and outputs the generated power to the input / output unit 14. In this embodiment, the power conversion circuit 17 includes a plurality of DC / DC converters 171 so as to be able to accommodate different voltage values ​​required by the processing unit 13 and the input / output unit 14. Note that in FIG. 1 and other figures, "DC / DC converter" is simply referred to as "DC / DC" for the sake of simplicity.

[0032] The power supply circuit 12 is used to supply DC power from the electronic device 10 to the connected device 20 or the connected device 20A at a voltage value corresponding to the connected device 20 or the connected device 20A, respectively. The power supply circuit 12 supplies DC power to the connected device 20 or the connected device 20A connected to the connector 11 based on DC power at a specified voltage value obtained from the power supply line 19.

[0033] The power supply circuit 12 can select a voltage value of the DC supply power from a first voltage value and a second voltage value. The first voltage value is smaller than a specified voltage value. The first voltage value is, for example, 5 V. The second voltage value is larger than the first voltage value. The second voltage value is, for example, equal to the specified voltage value. In this embodiment, the first voltage value corresponds to the voltage value of the DC supply power supplied to the connected device 20A, and the second voltage value corresponds to the voltage value of the DC supply power supplied to the connected device 20. The power supply circuit 12 sets the voltage value of the DC supply power to the first voltage value when the second terminal 210 connected to the detection terminal 112 is not a specific terminal, and sets the voltage value of the DC supply power to the second voltage value when the second terminal 210 connected to the detection terminal 112 is a specific terminal. Here, the specific terminal is a terminal among the multiple second terminals 210 that is included in the connected device 20 but not included in the connected device 20A. In this embodiment, the identification terminal 212 included in the connection device 20 is used as the specific terminal. Based on the voltage value of the detection terminal 112, the power supply circuit 12 determines whether the second terminal 210 connected to the detection terminal 112 is the specific terminal.

[0034] To realize the operation of setting the voltage value based on whether the terminal is a specific terminal or not, the power supply circuit 12 includes a voltage switching circuit 121 and a detection circuit 122, as shown in FIG.

[0035] The voltage switching circuit 121 switches the voltage value of the DC supply power output from the power supply terminal 111 of the connector 11 between a first voltage value and a second voltage value. The voltage switching circuit 121 of FIG. 1 includes a DC / DC converter 121a and a switch 121b. The DC / DC converter 121a generates DC supply power of a first voltage value based on DC power of a specified voltage value obtained from the power supply line 19, and outputs the generated DC supply power to the power supply terminal 111. The switch 121b is connected between the power supply line 19 and the power supply terminal 111. In the voltage switching circuit 121, when the switch 121b is off, the voltage value of the DC supply power is the first voltage value, and when the switch 121b is on, the voltage value of the DC supply power is the second voltage value. As shown in FIG. 1, the power supply circuit 12 includes a diode D13 for preventing backflow from the power supply terminal 111 to the switch 121b of the voltage switching circuit 121, and a diode D14 for preventing backflow from the power supply terminal 111 to the DC / DC converter 121a of the voltage switching circuit 121.

[0036] The detection circuit 122 detects the voltage applied to the detection terminal 112. The detection circuit 122 controls the voltage switching circuit 121 to switch the voltage value of the DC supply power based on the voltage value of the detection terminal 112. More specifically, the detection circuit 122 switches the switch 121b of the voltage switching circuit 121 on / off based on the voltage value of the detection terminal 112. As shown in FIGS. 4 and 6, the detection circuit 122 includes a control circuit 122a, resistors R11 and R12, and a capacitor C11. A series circuit of the resistor R11 and the capacitor C11 is connected between the internal power supply V11 and ground. The internal power supply V11 is, for example, a DC / DC converter 171 of the power conversion circuit 17. The resistor R12 is connected between the detection terminal 112 and a connection point between the resistor R11 and the capacitor C11. The control circuit 122a detects the voltage value across the capacitor C11 as the voltage value applied to the detection terminal 112. In this embodiment, the control circuit 122a compares the voltage value at the detection terminal 112 with a threshold value. The threshold value is set to be greater than the voltage value across the capacitor C11 when an identification terminal 212 (described later) is connected to the detection terminal 112, and smaller than the voltage value across the capacitor C11 when the detection terminal 112 is open or when the input terminal 211 is connected. The control circuit 122a turns off the switch 121b when the voltage value at the detection terminal 112 is equal to or greater than the threshold value, and turns on the switch 121b when the voltage value at the detection terminal 112 is less than the threshold value. The detection circuit 122 initially turns off the switch 121b.

[0037] The operation of the power supply circuit 12 is described in more detail below in section "1.3 Operation" with reference to FIGS.

[0038] [1.2.2 Connected devices] Next, connection device 20 and connection device 20A will be described with reference to Figures 1 and 5. As described above, in this embodiment, connection device 20 and connection device 20A are port replicators, with connection device 20 being a new model and connection device 20A being an older model.

[0039] [1.2.2.1 Connected Devices 20] As shown in FIG. 1, the connection device 20 includes a connector 21, a power supply path 22, a processing unit 23, an input / output unit 24, a control circuit 25, power conversion circuits 26 and 27, an external connection terminal 28, and a power supply path 29.

[0040] The connector 21 is used for connection to the electronic device 10. As shown in FIG. 1, the connector 21 includes a plurality of second terminals 210. The plurality of second terminals 210 include one or more (two in FIG. 1) input terminals 211, an identification terminal 212, one or more (three in FIG. 1) output terminals 213, and a pair of ground terminals 214. The input terminal 211 is used to receive DC power supply of a voltage value (the above-mentioned second voltage value) corresponding to the connected device 20 from the electronic device 10. The identification terminal 212 is electrically isolated from the input terminal 211 and connected to the detection terminal 112 as a specific terminal. The identification terminal 212 is used by the electronic device 10 to identify the connected device. In this embodiment, the identification terminal 212 is connected to ground via a resistor R21. The output terminal 213 is used to output DC power of a specified voltage value to the electronic device 10. Furthermore, the plurality of second terminals 210 may include one or more terminals for detecting the connection of the connected devices 20 and 20A, one or more terminals for detecting the connection of the electronic device 10, one or more terminals for communication, and a plurality of additional ground terminals. The communication terminals include terminals for UART communication or USB communication. In this embodiment, the connected device 20 is a port replicator, and therefore the connector 21 may have a structure for mechanically holding the electronic device 10.

[0041] FIG. 3 is a schematic diagram of an exemplary configuration of the connector 21 of the connection device 20 of FIG. 1 , with some parts omitted. FIG. 3 shows two input terminals 211, an identification terminal 212, three output terminals 213, and two ground terminals 214 among the multiple first terminals 110. The two input terminals 211, the identification terminal 212, the three output terminals 213, and the pair of ground terminals 214 are contact terminals shaped to connect to the corresponding first terminals 110 through contact. In this embodiment, the two input terminals 211, the identification terminal 212, the three output terminals 213, and the pair of ground terminals 214 are mountain-shaped spring terminals in a side view. Therefore, the two input terminals 211, the identification terminal 212, the three output terminals 213, and the pair of ground terminals 214 contact the two power supply terminals 111, the detection terminal 112, the three power receiving terminals 113, and the pair of ground terminals 114 with a predetermined contact pressure, respectively, and the contact state between them is maintained appropriately. The two input terminals 211, the identification terminal 212, the three output terminals 213, and the pair of ground terminals 214 are rectangular in plan view. The two input terminals 211, the identification terminal 212, the three output terminals 213, and the two ground terminals 214 are arranged in a row. The width direction (left-right direction in FIG. 3) of the input terminals 211, the identification terminal 212, and the output terminal 213 coincides with the direction in which the input terminals 211, the identification terminal 212, and the output terminal 213 are arranged (left-right direction in FIG. 3). The distance d between the input terminals 211, the identification terminal 212, and the output terminal 213 is narrower than the width w of the input terminals 211, the identification terminal 212, and the output terminal 213.

[0042] 3, the identification terminal 212 is adjacent to one or more input terminals 211. More specifically, the two input terminals 211, the identification terminal 212, and the three output terminals 213 are aligned in a row, with the identification terminal 212 located between the two input terminals 211 and the three output terminals 213. As described above, the plurality of second terminals 210 includes a pair of ground terminals 214, which are located on either side of the two input terminals 211, the identification terminal 212, and the three output terminals 213 that are aligned in a row.

[0043] In this embodiment, all second terminals 210 are contact terminals shaped to connect to corresponding first terminals 110 by contact, the width direction of all second terminals 210 coincides with the direction in which the second terminals 210 are arranged, and the spacing d between second terminals 210 is narrower than the width w of each second terminal 210. Since connector 11 of electronic device 10 and connector 21 of connection device 20 are connected to each other, the width w of second terminals 210 and the spacing d between second terminals 210 coincide with the width w of first terminals 110 and the spacing d between first terminals 110, respectively.

[0044] The external connection terminal 28 is used to connect an external power source to the connected device 20. The external power source is, for example, an AC adapter that converts AC power from a commercial AC power source into DC power of a specified voltage value. As described above, the specified voltage value is, for example, 16 V.

[0045] The power supply path 22 is an electric path that transmits DC supply power supplied from the electronic device 10 inside the connection device 20. The power supply path 22 is connected to the input terminal 211 of the connector 21. Therefore, the power supply path 22 can receive DC supply power from the input terminal 211 of the connector 21. In this embodiment, the electronic device 10 supplies DC supply power of a second voltage value to the connection device 20. Therefore, the power supply path 22 is an electric path that transmits DC supply power of the second voltage value supplied from the electronic device 10 inside the connection device 20.

[0046] Power supply line 29 is an electric path that transmits DC power of a specified voltage value inside connected device 20. Power supply line 29 is connected to external connection terminal 28. Therefore, power supply line 29 can receive DC power of a specified voltage value from external connection terminal 28.

[0047] 1, power supply line 22 is connected to power supply line 29 via diode D22 for preventing backflow from power supply line 29 to power supply line 22. As shown in Fig. 1, switch S21 is connected in power supply line 29 between external connection terminal 28 and output terminal 213. Power supply line 29 is provided with diode D21 for preventing backflow so that current from power supply line 22 does not flow into switch S21.

[0048] The processing unit 23 and the input / output unit 24 determine the functions of the connected device 20. The processing unit 23 and the input / output unit 24 are selected as appropriate depending on the functions required for the connected device 20. In FIG. 1, the processing unit 23 includes a plurality of processing circuits 231. However, the processing unit 23 is not limited to this configuration. The processing circuit 231 includes circuit elements capable of executing specific processes, such as a CPU, a microcomputer, a hub, and a video conversion IC. In FIG. 1, the input / output unit 24 includes a connector 241. However, the input / output unit 24 is not limited to this configuration. Examples of the connector 241 include an HDMI (registered trademark) connector and a connector conforming to the USB standard.

[0049] The control circuit 25 controls the switch S21. When the control circuit 25 detects connection of the electronic device 10 while receiving DC power of a specified voltage value from the external power supply via the external connection terminal 28, it turns on the switch S21. As a result, the external connection terminal 28 is connected to the electronic device 10 via the output terminal 213 of the connector 21, and DC power of the specified voltage value is supplied to the electronic device 10 from the external power supply connected to the external connection terminal 28. The connection of the electronic device 10 is detected using one or more terminals included in the second terminal 210 of the connector 21 for detecting the connection of the electronic device 10.

[0050] The power conversion circuit 26 generates DC power of a voltage value required for the operation of the control circuit 25 based on DC power of a specified voltage value obtained from the power supply line 29, and outputs the generated DC power to the control circuit 25. The power conversion circuit 26 is configured by, for example, a DC / DC converter.

[0051] The power conversion circuit 27 generates DC power of a voltage value (for example, 5 V) required by the processing unit 23 based on the DC power of a specified voltage value obtained from the power supply line 22, and outputs the generated power to the processing unit 23. The power conversion circuit 27 generates DC power of a voltage value (for example, 5 V, 9 V, 15 V, etc.) required by the input / output unit 24 based on the DC power of a specified voltage value obtained from the power supply line 22, and outputs the generated power to the input / output unit 24. In this embodiment, the power conversion circuit 27 includes a plurality of DC / DC converters 271 so as to be able to accommodate different voltage values ​​required by the processing unit 23 and the input / output unit 24.

[0052] [1.2.2.2 Connected device 20A] 5, connection device 20A includes connector 21A, power supply path 22A, processing unit 23, input / output unit 24, control circuit 25, power conversion circuits 26 and 27, external connection terminal 28, and power supply path 29. Connector 21A and power supply path 22A of connection device 20A are different from connector 21 and power supply path 22 of connection device 20.

[0053] Connector 21A is used for connection to electronic device 10. As shown in Fig. 5, connector 21A includes a plurality of second terminals 210. The plurality of second terminals 210 include one or more (three in Fig. 5) input terminals 211, one or more (three in Fig. 1) output terminals 213, and a pair of ground terminals 214, but unlike connector 21, does not include an identification terminal 212. More specifically, connector 21A has input terminals 211 at positions where identification terminals 212 are located in connector 21, and as a result, connector 21A has a greater number of input terminals 211 than connector 21.

[0054] The power supply path 22A is an electric path that transmits DC supply power supplied from the electronic device 10 inside the connection device 20. The power supply path 22A is connected to the input terminal 211 of the connector 21. Therefore, the power supply path 22A can receive DC supply power from the input terminal 211 of the connector 21. In the present embodiment, the electronic device 10 supplies DC supply power of a first voltage value to the connection device 20. Therefore, the power supply path 22A is an electric path that transmits DC supply power of the first voltage value supplied from the electronic device 10 inside the connection device 20. As shown in FIG. 5 , the power supply path 22A is not connected to the power supply path 29, unlike the power supply path 22. However, the power supply path 22A supplies power to the power conversion circuit 26.

[0055] [1.3 Operation] Next, the operation of the power supply circuit 12 when the connection device 20 or the connection device 20A is connected to the electronic device 10 will be described with reference to Figures 4, 6, and 7. Figure 4 is for explaining the operation of the power supply circuit 12, and therefore omits some of the electronic device 10 and the connection device 20. Similarly, Figure 6 is for explaining the operation of the power supply circuit 12, and therefore omits some of the electronic device 10 and the connection device 20A.

[0056] When neither the connection device 20 nor the connection device 20A is connected to the connector 11 of the electronic device 10, the detection circuit 122 of the power supply circuit 12 turns off the switch 121b of the voltage switching circuit 121. As a result, the voltage value of the DC supply power that can be supplied from the power supply terminal 111 is set to the first voltage value (S11 in FIG. 7).

[0057] As shown in FIG. 4, when the connected device 20 is connected to the electronic device 10, the detection circuit 122 acquires the voltage value of the detection terminal 112 (S12 in FIG. 7) and determines whether the voltage value of the detection terminal 112 is less than a threshold value (S13 in FIG. 7). When the connected device 20 is connected to the electronic device 10, the detection terminal 112 of the connector 11 is connected to the identification terminal 212 of the connector 21. As a result, the resistor R12 of the detection circuit 122 is connected to the resistor R21 and to ground via the detection terminal 112 and the identification terminal 212. As a result, a voltage obtained by dividing the voltage of the internal power supply V11 by a voltage divider circuit formed by a series circuit of resistors R11, R12, and R21 is applied to the capacitor C11. The control circuit 122a of the detection circuit 122 detects the voltage value of the voltage across the capacitor C11 as the voltage value of the voltage applied to the detection terminal 112. The control circuit 122a compares the voltage value of the detection terminal 112 with a threshold value. As described above, the threshold value is set to be greater than the voltage value across capacitor C1 when the identification terminal 212 is connected to the detection terminal 112, and less than the voltage value across capacitor C1 when the detection terminal 112 is open or when the input terminal 211 is connected. Therefore, the control circuit 122a determines that the voltage value of the detection terminal 112 is less than the threshold value (S13 in FIG. 7; YES). In this case, the control circuit 122a turns on switch 121b, which sets the voltage value of the DC supply power that can be supplied from the power supply terminal 111 to the second voltage value (S14 in FIG. 7).

[0058] As shown in FIG. 6, when connection device 20A is connected to electronic device 10 instead of connection device 20, detection circuit 122 acquires the voltage value of detection terminal 112 (S12 in FIG. 7) and determines whether the voltage value of detection terminal 112 is less than the threshold value (S13 in FIG. 7). When connection device 20A is connected to electronic device 10, detection terminal 112 of connector 11 is connected to input terminal 211 of connector 21A. Because input terminal 211 is connected to power supply terminal 111 of connector 11, a voltage from voltage switching circuit 121 is applied to detection terminal 112. As a result, the voltage from voltage switching circuit 121 is applied to capacitor C11. Control circuit 122a of detection circuit 122 detects the voltage value of the voltage across capacitor C11 as the voltage value of the voltage applied to detection terminal 112. Control circuit 122a compares the voltage value of detection terminal 112 with the threshold value. As described above, the threshold value is set to be greater than the voltage value across capacitor C1 when the identification terminal 212 is connected to the detection terminal 112, and less than the voltage value across capacitor C1 when the detection terminal 112 is open or when the input terminal 211 is connected. Therefore, the control circuit 122a determines that the voltage value of the detection terminal 112 is greater than or equal to the threshold value (S13 in FIG. 7; NO). In this case, the control circuit 122a keeps the switch 121b off, and sets the voltage value of the DC supply power that can be supplied from the power supply terminal 111 to the first voltage value (S15 in FIG. 7).

[0059] In this way, power supply circuit 12 executes a control method for supplying DC supply power from electronic device 10 to connection device 20 or connection device 20A connected to electronic device 10. This control method includes determining whether the second terminal 210 connected to detection terminal 112 among the plurality of second terminals 210 is a specific terminal when the connection device (connection device 20 or connection device 20A) is connected to connector 11. The control method includes supplying DC supply power having a voltage value determined based on the result of the determination to the connection device (connection device 20 or connection device 20A) via one or more power supply terminals 111 of connector 11. Therefore, according to this embodiment, the voltage value of the DC supply power supplied from electronic device 10 to the connection device (connection device 20 or connection device 20A) can be set to a value corresponding to the connection device (connection device 20 or connection device 20A).

[0060] [1.4 Connector Configuration] As described above, the connector 11 of the electronic device 10 has a plurality of first terminals 110. As shown in FIG. 2, the plurality of first terminals 110 include two power terminals 111, a detection terminal 112, and three power receiving terminals 113. Here, the power terminals 111 are used to supply power to a connected device (connected device 20 or connected device 20A). Therefore, it is desirable that the power terminals 111 do not come into contact with first terminals 110 used for other power supply, such as the power receiving terminals 113 of the connector 11, or second terminals 210 that do not correspond to the power terminals 111. In this embodiment, as shown in FIG. 2, the detection terminals 112 are adjacent to one or more power terminals 111. The detection terminals 112 are not used to supply power to a connected device (connected device 20 or connected device 20A). Therefore, the detection terminal 112 can be used to prevent the power terminal 111 from coming into contact with the first terminal 110 used for another power supply or the second terminal 210 that does not correspond to the power terminal 111, resulting in a short circuit, thereby reducing the possibility of malfunctions caused by a short circuit of the power terminal 111. In particular, the detection terminal 112 is located between the two power terminals 111 and the three power receiving terminals 113. This configuration allows the power receiving terminal 113 to be spaced apart from the power terminal 111. For example, even if the power receiving terminal 113 is damaged and displaced toward the power terminal 111, the presence of the detection terminal 112 can prevent the power receiving terminal 113 from reaching the power terminal 111, thereby reducing the possibility of the power receiving terminal 113 and the power terminal 111 being short-circuited directly or indirectly. Similarly, even if the power terminal 111 is damaged, the possibility of the power receiving terminal 113 and the power terminal 111 being short-circuited directly or indirectly can be reduced. In this way, connector 11 allows the distance between the power receiving terminal 113 and the power supply terminal 111 to be increased, thereby reducing the possibility of the power receiving terminal 113 and the power supply terminal 111 being short-circuited directly or indirectly due to a malfunction of connector 11, etc.

[0061] As described above, the connector 21 of the connection device 20 has a plurality of second terminals 210. As shown in FIG. 3 , the plurality of second terminals 210 include two input terminals 211, an identification terminal 212, and three output terminals 213. Here, the input terminal 211 is used to supply power to the connection device 20. Therefore, it is desirable that the input terminal 211 not come into contact with a second terminal 210 used for another power supply, such as the output terminal 213 of the connector 21, or a first terminal 110 that does not correspond to the input terminal 211. Therefore, as shown in FIG. 3 , the identification terminal 212 is adjacent to one or more input terminals 211. The identification terminal 212 is not used to supply power to the connection device 20. Therefore, the identification terminal 212 can be used to prevent a short circuit caused by contact with the input terminal 211 by a second terminal 210 used for another power supply or a first terminal 110 that does not correspond to the input terminal 211, thereby reducing the possibility of a malfunction caused by a short circuit of the output terminal 213. In particular, the identification terminal 212 is located between the two input terminals 211 and the three output terminals 213. This configuration allows the output terminals 213 to be spaced apart from the input terminals 211. For example, even if the output terminals 213 are damaged and displaced toward the input terminals 211, the presence of the identification terminals 212 can prevent the output terminals 213 from reaching the input terminals 211. In this way, the connector 21 allows the output terminals 213 to be spaced apart from the input terminals 211, thereby reducing the possibility that the output terminals 213 and the input terminals 211 will be short-circuited directly or indirectly due to a malfunction of the connector 21 or the like.

[0062] [1.5 Effects, etc.] The electronic device 10 described above includes a connector 11 and a power supply circuit 12. The connector 11 has a plurality of first terminals 110, which are connected to a plurality of second terminals 210 of the connected devices 20 and 20A, respectively. The connector 11 includes one or more power supply terminals 111 for supplying DC power to the connected devices 20 and 20A, and a detection terminal 112. When the connected devices 20 and 20A are connected to the connector 11, the power supply circuit 12 determines whether the second terminal 210 connected to the detection terminal 112 among the plurality of second terminals 210 is a specific terminal. The power supply circuit 12 supplies DC supply power having a voltage value determined based on the result of the determination to the connected devices 20 and 20A via the one or more power supply terminals 111 of the connector 11. With this configuration, the voltage value of the DC supply power supplied from the electronic device 10 to the connected device (connected device 20 or connected device 20A) can be set to a value corresponding to the connected device (connected device 20 or connected device 20A).

[0063] Furthermore, the detection terminal 112 is adjacent to one or more power supply terminals 111. With this configuration, it is possible to use the detection terminal 112 to prevent a short circuit caused by contact with the power supply terminal 111 by a first terminal 110 used for another power supply or a second terminal 210 that does not correspond to the power supply terminal 111, thereby reducing the possibility of malfunctions caused by a short circuit of the power supply terminal 111.

[0064] Furthermore, the multiple first terminals 110 include one or more power receiving terminals 113 for receiving DC power of a specified voltage value from connected devices 20, 20A. One or more power supply terminals 111, detection terminals 112, and one or more power receiving terminals 113 are arranged in a row such that detection terminal 112 is located between one or more power supply terminals 111 and one or more power receiving terminals 113. This configuration allows the power receiving terminal 113 and power supply terminal 111 to be spaced apart, thereby reducing the possibility of a direct or indirect short circuit between power receiving terminal 113 and power supply terminal 111 due to a malfunction of connector 11 or the like.

[0065] Furthermore, power supply circuit 12 sets the voltage value of the DC supply power to a first voltage value that is smaller than the specified voltage value when second terminal 210 connected to detection terminal 112 is not a specific terminal, and sets the voltage value of the DC supply power to a second voltage value that is larger than the first voltage value when second terminal 210 connected to detection terminal 112 is a specific terminal. With this configuration, the voltage value of the DC supply power supplied from electronic device 10 to a connected device (connected device 20 or connected device 20A) can be set to a value that corresponds to the connected device (connected device 20 or connected device 20A).

[0066] Furthermore, power supply circuit 12 determines whether second terminal 210 connected to detection terminal 112 is a specific terminal based on the voltage value of detection terminal 112. With this configuration, the voltage value of the DC supply power supplied from electronic device 10 to a connected device (connected device 20 or connected device 20A) can be set to a value corresponding to the connected device (connected device 20 or connected device 20A).

[0067] The electronic device 10 also includes a power supply path 19 for DC power of a specified voltage value connected to one or more power receiving terminals 113. The power supply circuit 12 supplies DC supply power to a connected device (connected device 20 or connected device 20A) connected to the connector 11 based on the DC power of the specified voltage value obtained from the power supply path 19. With this configuration, it is possible to supply DC supply power according to the connected device (connected device 20 or connected device 20A).

[0068] The power supply circuit 12 also includes a voltage switching circuit 121 and a detection circuit 122. The voltage switching circuit 121 includes a DC / DC converter 121a that generates DC supply power of a first voltage value based on DC power of a specified voltage value obtained from the power supply line 19 and outputs the generated DC supply power to one or more power supply terminals 111, and a switch 121b that is connected between the power supply line 19 and the one or more power supply terminals 111. The detection circuit 122 detects the voltage applied to the detection terminal 112. The detection circuit 122 switches the switch 121b on and off based on the voltage value of the detection terminal 112. This configuration allows the configuration of the power supply circuit 12 to be simplified.

[0069] Furthermore, in the initial state, the detection circuit 122 turns off the DC / DC converter 121a and the switch 121b. With this configuration, the voltage at the power supply terminal 111 can be kept low, thereby improving power consumption.

[0070] The electronic device 10 also includes a power supply circuit 16 that charges and discharges a battery 15 for operating the electronic device 10. The power supply circuit 16 charges the battery 15 based on DC power of a specified voltage value obtained from a power supply line 19. With this configuration, the electronic device 10 can be operated by the battery 15 even without power supply from a connected device (connected device 20 or connected device 20A).

[0071] The plurality of first terminals 110 also includes a pair of ground terminals 114. The pair of ground terminals 114 are located on both sides of a line of one or more power supply terminals 111, detection terminals 112, and one or more power receiving terminals 113. This configuration reduces the possibility that another first terminal 110 or a second terminal 210 not corresponding to these will come into direct or indirect contact with the power receiving terminal 113 and the power supply terminal 111 due to a malfunction of the connector 11 or the like.

[0072] Moreover, one or more power supply terminals 111, detection terminal 112, and one or more power receiving terminals 113 are contact terminals shaped to be connected by contact to the corresponding second terminals 210. This configuration facilitates connection between the electronic device 10 and a connection device (connection device 20 or connection device 20A).

[0073] Furthermore, the width direction of the one or more power supply terminals 111, the detection terminals 112, and the one or more power receiving terminals 113 coincides with the direction in which the one or more power supply terminals 111, the detection terminals 112, and the one or more power receiving terminals 113 are arranged. The spacing between the one or more power supply terminals 111, the detection terminals 112, and the one or more power receiving terminals 113 is narrower than the width of the one or more power supply terminals 111, the detection terminals 112, and the one or more power receiving terminals 113. With this configuration, the distance between the power receiving terminals 113 and the power terminals 111 can be increased while still making the connector 11 compact, thereby reducing the possibility of the power receiving terminals 113 and the power terminals 111 being short-circuited directly or indirectly due to a malfunction of the connector 11, etc.

[0074] The connection device 20 described above has a plurality of second terminals 210 that are connected to the plurality of first terminals 110 of the connector 11 of the electronic device 10, respectively. The plurality of second terminals 210 include one or more input terminals 211 that are connected to one or more power supply terminals 111 and receive DC supply power from the electronic device 10, and an identification terminal 212 that is electrically isolated from the one or more input terminals 211 and connected to the detection terminal 112 as a specific terminal. With this configuration, the voltage value of the DC supply power supplied from the electronic device 10 to the connection device 20 can be set to a value that corresponds to the connection device 20.

[0075] The device system 1 described above includes an electronic device 10 and a connection device 20 connected to the electronic device 10. The connection device 20 has a plurality of second terminals 210 that are connected to the plurality of first terminals 110 of the connector 11 of the electronic device 10, respectively. The plurality of second terminals 210 include one or more input terminals 211 that are connected to one or more power supply terminals 111 and receive DC supply power from the electronic device 10, and an identification terminal 212 that is electrically isolated from the one or more input terminals 211 and connected to the detection terminal 112 as a specific terminal. With this configuration, the voltage value of the DC supply power supplied from the electronic device 10 to the connection device 20 can be set to a value that corresponds to the connection device 20.

[0076] The control method described above is a control method for supplying DC supply power from electronic device 10 to a connection device (connection device 20 or connection device 20A) connected to electronic device 10. Electronic device 10 is equipped with connector 11 having a plurality of first terminals 110, the plurality of first terminals 110 being connected to a plurality of second terminals 210 of the connection device (connection device 20 or connection device 20A), respectively, and including one or more power supply terminals 111 for supplying DC power to the connection device (connection device 20 or connection device 20A), and a detection terminal 112. The control method includes, when the connection device (connection device 20 or connection device 20A) is connected to connector 11, determining whether the second terminal 210 connected to the detection terminal 112 among the plurality of second terminals 210 is a specific terminal. The control method includes supplying DC supply power having a voltage value determined based on the result of the determination to the connection device (connection device 20 or connection device 20A) via the one or more power supply terminals 111 of connector 11. According to this configuration, the voltage value of the DC power supplied from the electronic device 10 to the connected device (connected device 20 or connected device 20A) can be set to a value corresponding to the connected device (connected device 20 or connected device 20A).

[0077] [2. Modifications] The embodiments of the present disclosure are not limited to the above-described embodiments. The above-described embodiments can be modified in various ways depending on the design, etc., as long as the object of the present disclosure can be achieved. Modifications of the above-described embodiments are listed below. The modifications described below can be applied in appropriate combinations.

[0078] In one variant, the electronic device 10 is required to have at least the connector 11 and the power supply circuit 12, and it is not essential that it has the processing unit 13, the input / output unit 14, the battery 15, the power supply circuit 16, the power conversion circuit 17, the external connection terminal 18, and the power supply path 19.

[0079] In one modified example, the multiple first terminals 110 of the connector 11 may include at least one or more power terminals 111 and one or more detection terminals 112. The numbers of the power terminals 111, detection terminals 112, power receiving terminals 113, and ground terminals 114 in the connector 11 are not limited to those exemplified in the above embodiment. The arrangement of the multiple first terminals 110 in the connector 11 is not limited to that exemplified in the above embodiment. For example, the detection terminal 112 does not necessarily have to be adjacent to one or more power terminals 111, or it does not necessarily have to be disposed between the power terminal 111 and the power receiving terminal 113.

[0080] In one modified example, the power supply circuit 12 is not limited to the configuration example of the above embodiment. For example, the voltage switching circuit 121 is not limited to the configuration including the DC / DC converter 121a and the switch 121b. For example, the second voltage value may be different from the specified voltage value, in which case the voltage switching circuit 121 may include multiple DC / DC converters. Furthermore, the voltage switching circuit may be a switching power supply capable of adjusting the voltage value.

[0081] In one modification, the power supply circuit 12 may select the voltage value of the DC power supply from three or more voltage values. By appropriately setting the resistance value of the resistor R21 in the connected device 20, it becomes possible to identify multiple connected devices 20 that have the identification terminal 212.

[0082] In one variant, the connection device 20 is required to have at least the connector 21, and it is not essential that it has the power supply path 22, the processing unit 23, the input / output unit 24, the control circuit 25, the power conversion circuits 26 and 27, the external connection terminal 28, and the power supply path 29.

[0083] In one modified example, the multiple second terminals 210 of the connector 21 may include at least one or more input terminals 211 and identification terminals 212. The numbers of the input terminals 211, identification terminals 212, output terminals 213, and ground terminals 214 in the connector 21 are not limited to those exemplified in the above embodiment. The arrangement of the multiple second terminals 210 in the connector 21 is not limited to that exemplified in the above embodiment. For example, the identification terminal 212 does not necessarily have to be adjacent to one or more input terminals 211, or it does not necessarily have to be disposed between the input terminal 211 and the output terminal 213.

[0084] [3. Aspects] As is clear from the above-described embodiment and modifications, the present disclosure includes the following aspects. In the following, reference numerals are given in parentheses only to clarify the correspondence with the embodiment.

[0085] A first aspect is an electronic device (10) comprising a connector (11) and a power supply circuit (12). The connector (11) has a plurality of first terminals (110), which are respectively connected to a plurality of second terminals (210) of a connected device (20; 20A), and includes one or more power supply terminals (111) for supplying DC power to the connected device (20; 20A), and a detection terminal (112). When the connected device (20; 20A) is connected to the connector (11), the power supply circuit (12) determines whether the second terminal (210) connected to the detection terminal (112) among the plurality of second terminals (210) is a specific terminal. The power supply circuit (12) supplies DC power having a voltage value determined based on the result of the determination to the connected device (20; 20A) via one or more power supply terminals (111) of the connector (11). According to this aspect, the voltage value of the DC power supplied from the electronic device (10) to the connected device (20; 20A) can be set to a value corresponding to the connected device (20; 20A).

[0086] A second aspect is the electronic device (10) based on the first aspect. In the second aspect, the detection terminal (112) is adjacent to the one or more power terminals (111). According to this aspect, the detection terminal (112) can be used to prevent the power terminal (111) from coming into contact with a first terminal (110) used for another power supply or a second terminal (210) that does not correspond to the power terminal (111) and causing a short circuit, thereby reducing the possibility of malfunctions due to short circuits in the power terminal (111).

[0087] A third aspect is an electronic device (10) based on the first or second aspect. In the third aspect, the plurality of first terminals (110) include one or more power receiving terminals (113) for receiving DC power of a specified voltage value from the connection device (20; 20A). The one or more power supply terminals (111), the detection terminal (112), and the one or more power receiving terminals (113) are arranged in a row such that the detection terminal (112) is located between the one or more power supply terminals (111) and the one or more power receiving terminals (113). According to this aspect, the power receiving terminal (113) can be spaced apart from the power supply terminal (111), thereby reducing the possibility of a direct or indirect short circuit between the power receiving terminal (113) and the power supply terminal (111) due to a malfunction of the connector (11), etc.

[0088] A fourth aspect is an electronic device (10) based on the third aspect. In the fourth aspect, the power supply circuit (12) sets the voltage value of the DC supply power to a first voltage value smaller than the specified voltage value when the second terminal (210) connected to the detection terminal (112) is not the specific terminal, and sets the voltage value of the DC supply power to a second voltage value larger than the first voltage value when the second terminal (210) connected to the detection terminal (112) is the specific terminal. According to this aspect, the voltage value of the DC supply power supplied from the electronic device (10) to a connected device (20; 20A) can be set to a value corresponding to the connected device (20; 20A).

[0089] A fifth aspect is an electronic device (10) based on the fourth aspect. In the fifth aspect, the power supply circuit (12) determines whether the second terminal (210) connected to the detection terminal (112) is the specific terminal based on the voltage value of the detection terminal (112). According to this aspect, the voltage value of the DC supply power supplied from the electronic device (10) to the connected device (20; 20A) can be set to a value corresponding to the connected device (20; 20A).

[0090] A sixth aspect is an electronic device (10) based on the fifth aspect. In the sixth aspect, the electronic device (10) includes a power supply path (19) for DC power of the specified voltage value connected to the one or more power receiving terminals (113). The power supply circuit (12) supplies the DC supply power to the connection device (20; 20A) connected to the connector (11) based on the DC power of the specified voltage value obtained from the power supply path (19). According to this aspect, the configuration of the power supply circuit (12) can be simplified.

[0091] A seventh aspect is an electronic device (10) based on the sixth aspect. In the seventh aspect, the power supply circuit (12) includes a voltage switching circuit (121) and a detection circuit (122). The voltage switching circuit (121) includes a DC / DC converter (121a) that generates the DC supply power of the first voltage value based on the DC power of the specified voltage value obtained from the power supply line (19) and outputs the generated DC supply power to the one or more power supply terminals (111), and a switch (121b) connected between the power supply line (19) and the one or more power supply terminals (111). The detection circuit (122) detects a voltage applied to the detection terminal (112). The detection circuit (122) switches the switch (121b) on / off based on the voltage value of the detection terminal (112). This aspect simplifies the configuration of the power supply circuit (12).

[0092] An eighth aspect is the electronic device (10) based on the seventh aspect. In the eighth aspect, the detection circuit (122) initially turns off the DC / DC converter (121a) and the switch (121b). According to this aspect, the voltage at the power supply terminal (111) can be kept low, thereby improving power consumption.

[0093] A ninth aspect is an electronic device (10) based on any one of the sixth to eighth aspects. In the ninth aspect, the electronic device (10) includes a power supply circuit (16) that charges and discharges a battery (15) for operating the electronic device (10). The power supply circuit (16) charges the battery (15) based on DC power of the specified voltage value obtained from the power supply line (19). According to this aspect, the electronic device (10) can be operated by the battery (15) even without power supply from a connected device (20; 20A).

[0094] A tenth aspect is an electronic device (10) based on any one of the third to ninth aspects. In the tenth aspect, the plurality of first terminals (110) include a pair of ground terminals (114). The pair of ground terminals (114) are located on both sides of the one or more power supply terminals (111), the detection terminal (112), and the one or more power receiving terminals (113), which are aligned in a row. This aspect reduces the possibility that the power receiving terminals (113) and the power supply terminals (111) will come into direct or indirect contact with other first terminals (110) or second terminals (210) that do not correspond thereto due to a malfunction of the connector (11).

[0095] An eleventh aspect is an electronic device (10) based on any one of the third to tenth aspects. In the eleventh aspect, the one or more power supply terminals (111), the detection terminal (112), and the one or more power receiving terminals (113) are contact terminals shaped to be connected to the corresponding second terminals (210) by contact. This aspect facilitates connection between the electronic device (10) and a connection device (20; 20A).

[0096] A twelfth aspect is an electronic device (10) based on the eleventh aspect. In the twelfth aspect, the width direction of the one or more power terminals (111), the detection terminals (112), and the one or more power receiving terminals (113) coincides with the direction in which the one or more power terminals (111), the detection terminals (112), and the one or more power receiving terminals (113) are arranged. The spacing between the one or more power terminals (111), the detection terminals (112), and the one or more power receiving terminals (113) is narrower than the width of the one or more power terminals (111), the detection terminals (112), and the one or more power receiving terminals (113). According to this aspect, the connector (11) can be configured compactly while the distance between the power receiving terminal (113) and the power supply terminal (111) can be increased, thereby reducing the possibility of a direct or indirect short circuit between the power receiving terminal (113) and the power supply terminal (111) due to a malfunction of the connector (11), etc.

[0097] A thirteenth aspect is a connection device (20) having a plurality of second terminals (210) to be connected to a plurality of first terminals (110) of a connector (11) of an electronic device (10) according to any one of the first to twelfth aspects. The plurality of second terminals (210) include one or more input terminals (211) connected to the one or more power supply terminals (111) for receiving DC supply power from the electronic device (10), and an identification terminal (212) electrically isolated from the one or more input terminals (211) and connected to the detection terminal (112) as the specific terminal. According to this aspect, the voltage value of the DC supply power supplied from the electronic device (10) to the connection device (20; 20A) can be set to a value corresponding to the connection device (20; 20A).

[0098] A fourteenth aspect is an equipment system (1) comprising an electronic device (10) according to any one of the first to twelfth aspects and a connection device (20) connected to the electronic device (10). The connection device (20) has a plurality of second terminals (210) connected to a plurality of first terminals (110) of a connector (11) of the electronic device (10), respectively. The plurality of second terminals (210) include one or more input terminals (211) connected to the one or more power supply terminals (111) for receiving DC supply power from the electronic device (10), and an identification terminal (212) electrically isolated from the one or more input terminals (211) and connected to the detection terminal (112) as the specific terminal. According to this aspect, the voltage value of the DC supply power supplied from the electronic device (10) to the connection device (20; 20A) can be set to a value corresponding to the connection device (20; 20A).

[0099] A fifteenth aspect is a control method for supplying DC power from an electronic device (10) to a connection device (20; 20A) connected to the electronic device (10). The electronic device (10) includes a connector (11) having a plurality of first terminals (110), the plurality of first terminals (110) being connected to a plurality of second terminals (210) of the connection device (20; 20A), respectively, and including one or more power supply terminals (111) for supplying DC power to the connection device (20; 20A), and a detection terminal (112). The control method includes, when the connection device (20; 20A) is connected to the connector (11), determining whether the second terminal (210) connected to the detection terminal (112) among the plurality of second terminals (210) is a specific terminal. The control method includes supplying DC supply power having a voltage value determined based on the result of the determination to the connected device (20; 20A) via one or more power supply terminals (111) of the connector (11). According to this aspect, the voltage value of the DC supply power supplied from the electronic device (10) to the connected device (20; 20A) can be set to a value corresponding to the connected device (20; 20A). [Industrial Applicability]

[0100] The present disclosure is applicable to electronic devices, connected devices, device systems, and control methods. Specifically, the present disclosure is applicable to electronic devices that supply DC supply power to connected devices, connected devices that receive DC supply power from electronic devices, device systems that supply DC supply power from electronic devices to connected devices, and control methods for supplying DC supply power from electronic devices to connected devices. [Explanation of symbols]

[0101] 1. Equipment System 10 Electronic equipment 11 Connector 110 1st terminal 111 Power terminal 112 Detection terminal 113 Power receiving terminal 114 Ground terminal 12 Power supply circuit 121 Voltage switching circuit 121a DC / DC converter 121b switch 122 detection circuit 15 Battery 16 Power circuit 19 Power supply line 20,20A connected devices 210 2nd terminal 211 Input terminal 212 Identification terminal

Claims

1. a connector having a plurality of first terminals, the plurality of first terminals being respectively connected to a plurality of second terminals of a connected device, the connector including one or more power supply terminals for supplying DC power to the connected device, a detection terminal, and one or more power receiving terminals for receiving DC power having a specified voltage value from the connected device; a power supply circuit that, when the connection device is connected to the connector, determines whether a second terminal connected to the detection terminal among the plurality of second terminals is a specific terminal, and supplies DC power having a voltage value set based on the result of the determination to the connection device via one or more power supply terminals of the connector; Equipped with the one or more power supply terminals, the detection terminal, and the one or more power receiving terminals are arranged such that the detection terminal is located between the one or more power supply terminals and the one or more power receiving terminals; electronic equipment.

2. the detection terminal is adjacent to the one or more power terminals; The electronic device according to claim 1 .

3. The power supply circuit includes: If the second terminal connected to the detection terminal is not the specific terminal, the voltage value of the DC supply power is set to a first voltage value that is smaller than the specified voltage value; when the second terminal connected to the detection terminal is the specific terminal, the voltage value of the DC supply power is set to a second voltage value that is greater than the first voltage value. The electronic device according to claim 1 .

4. the power supply circuit determines whether a second terminal connected to the detection terminal is the specific terminal based on the voltage value of the detection terminal. The electronic device according to claim 3 .

5. a power supply path connected to the one or more power receiving terminals and receiving DC power of the specified voltage value; the power supply circuit supplies the DC power to the device connected to the connector based on the DC power of the specified voltage value obtained from the power supply line.

5. The electronic device according to claim 4.

6. The power supply circuit includes: a DC / DC converter that generates the DC supply power of the first voltage value based on the DC power of the specified voltage value obtained from the power supply line and outputs the DC supply power to the one or more power supply terminals; and a voltage switching circuit having a switch connected between the power supply line and the one or more power supply terminals; a detection circuit for detecting a voltage applied to the detection terminal; and the detection circuit switches the switch on / off based on the value of the voltage at the detection terminal. The electronic device according to claim 5 .

7. The detection circuit turns off the DC / DC converter and the switch in an initial state.

7. The electronic device according to claim 6.

8. a power supply circuit that charges and discharges a battery for operating the electronic device; the power supply circuit charges the battery based on the DC power of the specified voltage value obtained from the power supply path. The electronic device according to any one of claims 5 to 7.

9. the plurality of first terminals include a pair of ground terminals, the pair of ground terminals are arranged such that the one or more power supply terminals, the detection terminal, and the one or more power receiving terminals are located between the pair of ground terminals; 9. The electronic device according to claim 1.

10. each of the one or more power supply terminals, the detection terminal, and the one or more power receiving terminals is a contact terminal shaped to be connected to a corresponding second terminal by contact; 10. The electronic device according to claim 1.

11. a width direction of the one or more power supply terminals, the detection terminal, and the one or more power receiving terminals coincides with a direction in which the one or more power supply terminals, the detection terminal, and the one or more power receiving terminals are arranged; a distance between the one or more power supply terminals, the detection terminal, and the one or more power receiving terminals is narrower than a width between the one or more power supply terminals, the detection terminal, and the one or more power receiving terminals; The electronic device according to claim 10.

12. An electronic device comprising: a connector for connecting a plurality of second terminals to a plurality of first terminals of the ... the plurality of second terminals include one or more input terminals connected to the one or more power supply terminals to receive the DC supply power from the electronic device, and an identification terminal electrically isolated from the one or more input terminals and connected to the detection terminal as the specific terminal; Connected devices.

13. An electronic device according to any one of claims 1 to 11; a connection device connected to the electronic device; Equipped with the connection device has a plurality of second terminals respectively connected to a plurality of first terminals of the connector of the electronic device, the plurality of second terminals include one or more input terminals connected to the one or more power supply terminals to receive the DC supply power from the electronic device, and an identification terminal electrically isolated from the one or more input terminals and connected to the detection terminal as the specific terminal; Equipment systems.

14. 1. A control method for supplying DC power from an electronic device to a connected device connected to the electronic device, comprising: the electronic device comprises a connector having a plurality of first terminals, the plurality of first terminals being connected to a plurality of second terminals of the connected device, the connector including one or more power supply terminals for supplying DC power to the connected device, a detection terminal, and one or more power receiving terminals for receiving DC power having a specified voltage value from the connected device; the one or more power supply terminals, the detection terminal, and the one or more power receiving terminals are arranged such that the detection terminal is located between the one or more power supply terminals and the one or more power receiving terminals; The control method includes: determining whether a second terminal connected to the detection terminal among the plurality of second terminals is a specific terminal when the connection device is connected to the connector; supplying DC power having a voltage value set based on the result of the determination to the connected device via one or more power supply terminals of the connector; Including, Control method.

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