JP2009176210A - Electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic apparatus capable of preventing the increase of negotiation communication operations, controlling the increase in composition and supplying electric power more than standard specifications. <P>SOLUTION: The electronic apparatus has a communication port which communicates data, a supply power switch part which supplies electric power of the standard specifications from outside through the communication port, and a control part which makes the supply power switch part supply power out of the standard specifications through the communication port, when receiving a communication request to increase supply power from outside through the communication port. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electronic device.

  As a conventional technique, there is an electronic device that supplies power from a host system that can supply power exceeding a standard by USB (Universal Serial Bus) bus power (see, for example, Patent Document 1).

This electronic device has a USB interface negotiated with the host system via a USB port, a high load unit that operates at a nonstandard 24 V, and a high load unit only when power is supplied by a USB bus power at a nonstandard 24 V Power supply with the voltage set in the low load part regardless of whether the standard part 5V or the non-standard 24V power is supplied. A power supply that supplies power at 5 V standard and 24 V outside standard by USB bus power, a voltage selection unit that selects either 5 V or 24 V, an electronic device, and a USB port Negotiation after USB connection to a host system that has a USB interface to negotiate Requests to power a standard non-standard 24V. As a result, when the host system responds to a power supply request at a non-standard 24 V power supply, the electronic device can receive a power supply exceeding the standard, so that the high load unit is operated by power supply using USB bus power. Can do.
JP 2003-263245 A

  However, according to the conventional electronic device, a process of requesting the host system to supply power outside the standard and a process of receiving a response to the request are necessary, and there is a problem that communication operation of negotiation increases. is there. In addition, since power is supplied by a voltage outside the standard, a transformer is required and the configuration increases, which is not suitable for downsizing.

  Accordingly, it is an object of the present invention to provide an electronic device that can suppress an increase in negotiation communication operation, suppress an increase in configuration, and can supply power exceeding the standard.

(1) In order to achieve the above object, the present invention provides a communication port for communicating data, a supply power switching unit for supplying standard power from the outside through the communication port, and an external supply through the communication port. An electronic apparatus is provided that includes a control unit that causes the power supply switching unit to supply nonstandard power through the communication port when a communication request for increasing power is received.

  According to the above-described configuration, when a communication request for increasing provided power is received from the outside, non-standard power is supplied. Therefore, when the communication request is not received, the negotiation communication operation does not increase. In addition, since the operation of the control unit can be achieved by software, power exceeding the standard can be supplied without increasing the configuration.

(2) In order to achieve the above object, the present invention is based on a communication port for communicating data, a rechargeable internal power supply, a power supply of the internal power supply, or an external standard via the communication port. A control unit that feeds non-standard power to the supply power switching unit via the communication port when a communication request for increasing power supply is received from the outside via the communication port and a power supply switching unit that switches power feeding An electronic device is provided.

  According to the configuration described above, in addition to the same effect as in (1), it is possible to supply more than nonstandard power by using an internal power supply in combination.

  According to the present invention, it is possible to suppress an increase in the communication operation of negotiation, suppress an increase in the configuration, and supply power exceeding the standard.

  Embodiments of an electronic apparatus according to the present invention will be described below in detail with reference to the drawings.

[First Embodiment]
(Configuration of electronic equipment)
FIG. 1 is a perspective view showing an electronic apparatus according to the first embodiment of the present invention.

  The electronic device 1 receives a broadcast wave from the outside via an antenna (not shown) and displays video, or reproduces content such as music data and video data stored in a built-in storage unit to output audio and video. It is a multimedia player that outputs and operates with a rechargeable internal power supply. The host system 2 includes a storage unit that stores content, a power supply unit that supplies power to the outside, and a control unit that controls each unit, and via a USB cable 3 connected to a USB port 20 as a communication port. When the connection of the electronic device 1 is recognized, power is supplied to the electronic device 1 via the USB cable 3 and the content is copied to the electronic device 1.

  The electronic device 1 also stores electronic components such as a CPU (Central Processing Unit) and an HDD (Hard Disc Drive) in the main body 10 and switches the power-on state (power on / off) of the electronic device 1 to the front. An operation unit 15 including a power switch, a plurality of switches capable of menu operation, volume operation, channel switching operation, and the like, a display unit 16 including a liquid crystal display panel for displaying characters, images, and the like, and a USB of the USB cable 3 And a USB port 14 into which the connector is inserted.

The USB cable 3 has a USB bus line for supplying power and a USB data line for communicating information. The USB bus line is composed of V _bus and GND, and supplies 5 V and 500 mA as standard power. The USB data line is composed of D + and D−, and high speed communication is executed when D + is High and D− is Low, and low speed communication is executed when D + is Low and D− is High. If both D + and D- are Low, it is considered that there is no connection.

  FIG. 2 is a block diagram showing a configuration example of the electronic device according to the first embodiment of the present invention.

  The electronic device 1 includes a control unit 11 that controls each unit, a storage unit 12 that includes an HDD that stores content 12A, a memory 13 that temporarily stores information and assists the operation of the control unit 11, and the like. A USB port 14 capable of inserting a connector and communicating information and supplying power; an operation unit 15 that outputs an operation signal based on operation contents of a plurality of switches; and a display unit 16 that displays characters, images, and the like A power supply switching unit 17 that switches the battery 19 or the USB port 14 to supply power to each unit; a charging unit 18 that charges the battery 19 when power is supplied from the USB port 14; And a battery 19 as an internal power source including a lithium ion battery cell.

  The control unit 11 has a USB request analysis determination unit 11A that negotiates with the outside via the USB port 14 and controls the operation of the supply power switching unit 17 based on the USB request when a USB request is received from the outside.

  When power is supplied from the USB port 14, the supply power switching unit 17 supplies power of 5 V and 500 mA, which is USB standard power, to each unit. In addition, when power is supplied from the USB port 14 and the USB request analysis determination unit 11A determines that nonstandard power can be supplied, for example, 5 V and 2 A of power are supplied to each unit.

  The electronic device 1 further includes an audio output unit including a speaker, an earphone jack, or the like (not shown), a wireless communication unit that communicates with the outside using a wireless LAN, Bluetooth (registered trademark), or the like.

  FIG. 3 is a block diagram showing a configuration example of the host system according to the first embodiment of the present invention.

  The host system 2 includes a USB port 20 into which a USB connector can be inserted, can communicate information with the outside, and can supply power to the outside, a control unit 21 that controls each unit, an HDD that stores content 22A, and the like. A storage unit 22, a power supply unit 23 that supplies power to an external electronic device connected to the USB port 20, and a power source that supplies power to each unit and supplies power to the outside via the power supply unit 23 Part 24.

  The control unit 21 has a USB controller 21 </ b> A that transmits a USB request to the outside via the USB port 20.

  The power supply unit 23 can supply, for example, 5 V and 2.5 A of power as the maximum supply power to the outside.

(Operation)
The operation of the electronic device according to the first embodiment of the present invention will be described below with reference to the drawings.

  In a state where the USB cable 3 is not connected to the USB port 14 of the electronic device 1, the supply power switching unit 17 operates to supply the power of the battery 19 to each unit. In the state where the USB cable 3 is connected to the USB port 14 and the standard power of 5 V and 500 mA is supplied by the USB bus power, the supply power switching unit 17 normally supplies the power from the USB bus power to each unit. When the power consumption of each unit exceeds the standard power, the USB bus power and the power of the battery 19 are used in combination to supply, for example, 5 V, 1.5 A power to each unit.

  As an operation performed in the electronic device 1, for example, when reproducing the content 12 </ b> A stored in the storage unit 12, the control unit 11 receives the operation signal and reads the content 12 </ b> A from the storage unit 12 into the memory 13. In general, in order to operate the storage unit 12 such as an HDD, it is necessary to rotate the magnetic disk, which consumes more power than operating the other units. The unit 12 operates only for a certain period of time required to read the content 12A, and the amount of power required for the operation is required only to operate the storage unit 12 for a certain period of time. Therefore, in a state in which standard power of 5 V and 500 mA is supplied by USB bus power, the supply power switching unit 17 operates the storage unit 12 and each unit necessary for reproduction by supplying power from the USB bus power. Let

  As another example, when the content 22A stored in the storage unit 22 of the host system 2 is copied to the storage unit 12 via the USB cable 3, the storage unit 12 operates to copy the content 22A. Although only a certain period of time is required, when the copy of the content 22A extends over a plurality of contents, the time during which the storage unit 12 operates during the copy operation is longer than that during reproduction. Therefore, in a state where the standard power 500 mA is supplied by the USB bus power, the power from the USB bus power is insufficient with respect to the power to operate each unit, and the supply power switching unit 17 is connected to the USB bus power and the battery 19. It operates so as to supply power of 1.5 A to the storage unit 12 and each unit necessary for copying by using power together.

  FIG. 4 is a flowchart illustrating an operation example of the electronic apparatus according to the first embodiment of the invention.

  First, when an external device such as the host system 2 is connected to the electronic device 1 via the USB cable 3 (S10), the supply power switching unit 17 uses the USB bus power from the host system 2 via the USB port 14. Electric power of 5 V and 500 mA, which is standard power, is supplied (S11). Next, the USB request analysis determination unit 11A of the control unit 11 negotiates with the USB controller 21A of the control unit 21 to communicate with the host system 2 (S12).

  In the negotiation, when a USB request for increasing provided power is received from the USB controller 21A (S13; Yes), the USB request analysis determining unit 11A causes the supplied power switching unit 17 to have a standard power of 5V, a fixed power of 500 mA or more, For example, 5 V and 2 A of power are operated to be supplied from the host system 2 (S14). The storage unit 12 and each unit necessary for copying operate with USB bus power by supplying power from the supply power switching unit 17, transfer the content 22A, and copy it to the storage unit 12 (S15).

  In the negotiation, when the USB request for increasing the provided power is not received from the USB controller 21A (S13; No), the USB request analysis determination unit 11A determines that the external device is a normal USB host (S16). The storage unit 12 and each unit necessary for copying operate by supplying power from the supply power switching unit 17 together with the USB bus power supplied by the standard power and the battery 19, and transferring the content 22A. The data is copied to the storage unit 12 (S17).

  As described above, the USB bus power supplies a power of 1.5 A or more, which uses both the standard power of the USB bus power and the power of the battery 19, and a power larger than 500 mA outside the standard, for example, 2A. In this case, the storage unit 12 and each unit necessary for copying are operated without supplying power from the battery 19. That is, copying can be executed even when the remaining power of the battery 19 is zero.

(Effects of the first embodiment)
According to the first embodiment described above, when the electronic device 1 receives the USB request for increasing the provided power from the host system 2, the electronic device 1 increases the power supply power of the USB bus power via the USB port 14. The increase in communication operation can be minimized.

  The USB bus power supplied by the host system 2 is always 5V, and the electronic device 1 does not require a transformer. Further, by adding a USB request analysis determination unit 11A operated by the control unit 11 as software, for example, the present invention can be implemented without increasing the configuration of the electronic device 1.

  The operation of the electronic device 1 is not limited to the copy of the content 22 </ b> A, but may be of any type, such as browsing the Internet via the host system 2 or charging the battery 19.

[Second Embodiment]
(Operation)
FIG. 5 is a flowchart showing an operation example of the electronic apparatus according to the second embodiment of the present invention. In the following description, portions having the same configuration and function as those of the first embodiment are denoted by common reference numerals.

  First, when an external device such as the host system 2 is connected to the electronic device 1 via the USB cable 3 (S20), the supply power switching unit 17 uses the USB bus power from the host system 2 via the USB port 14. Power of 5 V and 500 mA, which is standard power, is supplied (S21). Next, the USB request analysis determination unit 11A of the control unit 11 negotiates with the USB controller 21A of the control unit 21 to communicate with the host system 2 (S22).

  In the negotiation, when a USB request for an increase in provided power is received from the USB controller 21A (S23; Yes), the USB request analysis determination unit 11A receives an available power value, for example, 2.5A (S24). Next, the USB request analysis determination unit 11A sets a power supply power value that is less than or equal to the suppliable power value, for example, 2A (S25), and causes the power supply switch unit 17 to operate to supply power from the host system 2 (S26). The storage unit 12 and each unit necessary for copying operate with USB bus power by supplying power from the supply power switching unit 17, transfer the content 22A, and copy it to the storage unit 12 (S27).

  Further, in the negotiation, when a USB request for increasing provided power is not received from the USB controller 21A (S23; No), the USB request analysis determination unit 11A determines that the external device is a normal USB host (S28). The storage unit 12 and each unit necessary for copying operate by supplying power from the supply power switching unit 17 together with the USB bus power supplied by the standard power and the battery 19, and transferring the content 22A. The data is copied to the storage unit 12 (S29).

(Effect of the second embodiment)
According to the second embodiment described above, in addition to the effects of the first embodiment, the electronic device 1 receives the available power value from the host system 2 and operates to set the power supply power value. Power can be supplied without exceeding the power value that can be provided by the host system 2.

  In step S24, if the USB request analysis determination unit 11A determines that the available power value is lower than the power value necessary for content transfer, the USB power analysis value is set to the same value as the available power value, and the shortage is determined by the battery. By using 19 together, power may be supplied to the storage unit 12 and each unit necessary for copying.

[Third Embodiment]
(Operation)

  FIG. 6 is a flowchart showing an operation example of the electronic apparatus according to the third embodiment of the present invention.

  First, when an external device such as the host system 2 is connected to the electronic device 1 via the USB cable 3 (S30), the supply power switching unit 17 uses the USB bus power from the host system 2 via the USB port 14. Electric power of 5 V and 500 mA, which is standard power, is supplied (S31).

  Next, the USB request analysis determination unit 11A determines that both the USB data lines D + and D− are maintained in a high state for a certain time, for example, 200 msec or longer, by the host system 2 (S32; Yes) Waits for both D + and D- to become Low (S33), and in order to communicate with the host system 2, either D + or D- is set to High in accordance with the communication speed with the host system. (S34).

  Next, the USB request analysis determination unit 11A of the control unit 11 negotiates with the USB controller 21A of the control unit 21 to communicate with the host system 2 (S35). When the negotiation is completed, the USB request analysis determination unit 11A causes the supply power switching unit 17 to operate so as to supply the standard power 5V, a fixed power of 500 mA or more, for example, 5V or 2A, from the host system 2 ( S36). The storage unit 12 and each unit necessary for copying operate by USB bus power by supplying power from the supply power switching unit 17, transfer the content 22A, and copy it to the storage unit 12 (S37).

  Also, the USB request analysis determination unit 11A determines that both the USB data lines D + and D− are not maintained in a high state for a certain time, for example, 200 msec or longer, by the host system 2 (S32; No) The external device is determined to be a normal USB host (S38), and the USB request analysis determination unit 11A of the control unit 11 negotiates with the USB controller 21A of the control unit 21 to communicate with the host system 2 (S39). Next, the storage unit 12 and each unit necessary for copying operate by supplying power from the supply power switching unit 17 together with the USB bus power supplied by the standard power and the battery 19, and the content 22A. And is copied to the storage unit 12 (S40).

(Effect of the third embodiment)
According to the third embodiment described above, the electronic device 1 monitors the USB data line and increases the USB bus power supply power via the USB port 14 when both D + and D− become High. Therefore, the negotiation communication operation can be minimized.

It is a perspective view which shows the electronic device which concerns on the 1st Embodiment of this invention. It is a block diagram which shows the structural example of the electronic device which concerns on the 1st Embodiment of this invention. It is a block diagram which shows the structural example of the host system which concerns on the 1st Embodiment of this invention. It is a flowchart which shows the operation example of the electronic device which concerns on the 1st Embodiment of this invention. It is a flowchart which shows the operation example of the electronic device which concerns on the 2nd Embodiment of this invention. It is a flowchart which shows the operation example of the electronic device which concerns on the 3rd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Electronic device, 2 ... Host system, 3 ... USB cable, 10 ... Main body, 11 ... Control part, 11A ... USB request analysis judgment part, 12 ... Memory | storage part, 12A ... Content, 13 ... Memory, 14 ... USB port, DESCRIPTION OF SYMBOLS 15 ... Operation part, 16 ... Display part, 17 ... Supply power switching part, 18 ... Charging part, 19 ... Battery, 20 ... USB port, 21 ... Control part, 21A ... USB controller, 22 ... Memory | storage part, 22A ... Content, 23 ... Power supply unit, 24 ... Power supply unit

Claims (7)

A communication port for communicating data;
A supply power switching unit that feeds standard power from outside via the communication port;
And a control unit that causes the supply power switching unit to supply non-standard power through the communication port when a communication request for increasing provided power is received from the outside through the communication port. machine.   When the control unit receives an available power value together with the communication request for increasing provided power, the control unit sets a supply power value equal to or less than the available power value and supplies power to the supplied power switching unit via the communication port. The electronic apparatus according to claim 1, wherein: The communication port is a USB port conforming to the USB standard,
When the control unit detects that the D + and D− of the USB data line are both high for a certain time as the communication request, the control unit supplies non-standard power to the supply power switching unit via the communication port. The electronic apparatus according to claim 1, wherein: A communication port for communicating data;
Rechargeable internal power supply,
A power supply switching unit that switches power supply of the internal power supply or power supply according to a standard from the outside via the communication port;
And a control unit that causes the supply power switching unit to supply non-standard power through the communication port when a communication request for increasing provided power is received from the outside through the communication port. machine.   When the non-standard power is less than the power consumption, the control unit causes the supply power switching unit to supply non-standard power via the communication port and also uses the internal power supply together. The electronic device according to claim 4.   When the control unit receives an available power value together with the communication request for increasing provided power, the control unit sets a supply power value equal to or less than the available power value and supplies power to the supplied power switching unit via the communication port. The electronic apparatus according to claim 4, wherein: The communication port is a USB port conforming to the USB standard,
When the control unit detects that the D + and D− of the USB data line are both high for a certain time as the communication request, the control unit supplies non-standard power to the supply power switching unit via the communication port. The electronic apparatus according to claim 4, wherein:

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