KR20080063667A - Apparatus and method for auto system on/off control in usb device - Google Patents

Apparatus and method for auto system on/off control in usb device Download PDF

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Publication number
KR20080063667A
KR20080063667A KR1020070000336A KR20070000336A KR20080063667A KR 20080063667 A KR20080063667 A KR 20080063667A KR 1020070000336 A KR1020070000336 A KR 1020070000336A KR 20070000336 A KR20070000336 A KR 20070000336A KR 20080063667 A KR20080063667 A KR 20080063667A
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KR
South Korea
Prior art keywords
standby mode
power
usb
host
usb terminal
Prior art date
Application number
KR1020070000336A
Other languages
Korean (ko)
Inventor
김형석
Original Assignee
엘지전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to KR1020070000336A priority Critical patent/KR20080063667A/en
Publication of KR20080063667A publication Critical patent/KR20080063667A/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/266—Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • G06F1/3206—Monitoring of events, devices or parameters that trigger a change in power modality
    • G06F1/3215—Monitoring of peripheral devices
    • G06F1/3221—Monitoring of peripheral devices of disk drive devices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • G06F1/3234—Power saving characterised by the action undertaken
    • G06F1/325—Power saving in peripheral device

Abstract

A device and a method for turning on/off a USB(Universal Serial Bus) terminal automatically in a standby mode of a host are provided to prevent power consumption of a battery of the USB terminal by turning off the USB terminal automatically when the host enters the standby mode in a turn-on state of the USB terminal. A PSU(Power Supply Unit)(120) supplies power to a USB terminal(10). A power manager(110) controls output power of the PSU according to an operation state of the USB terminal. A system controller(100) turns off the USB terminal by cutting off power supplied from the PSU to the USB terminal according to a control signal applied to the PSU when a standby state is kept for a predetermined time by detecting a standby mode state of a connected host(20) from data received through a USB interface(130). The power of the USB terminal is turned off when the predetermined time is passed after the host connected with the USB terminal enters the standby mode state. A power supply unit(123) outputs the power sources of both a battery power unit(121) and an external power input unit(122) selectively.

Description

Apparatus and method for auto system on / off control in USB device} in host standby mode

1 is a view for explaining an embodiment of the automatic shutdown of the USB terminal system in the host standby mode according to the present invention

2 is a flowchart illustrating an embodiment of a method for automatically turning off a USB terminal system in a host standby mode according to the present invention.

<Explanation of symbols for the main parts of the drawings>

100: system control unit 110: power management unit

120: power supply 121: battery power

122: external power input unit 123: power supply unit

130: USB interface unit 131: USB port

140: I / O interface unit 141: user input unit

142: output unit

The present invention relates to an apparatus and method for automatically turning off a USB terminal system in a host standby mode.

Universal Serial Bus (USB) began with the universal bus specification developed to provide a simple way of interconnection for the growth of the Computer Telephony Integration (CTI) industry. Of course, it is also applied to portable information processing devices and general electronic devices to enable mutual data exchange between connected devices.

The USB port for connecting the devices to each other through the USB is provided with a power terminal for supplying power as well as a terminal for transmitting and receiving data between the devices, the power used in one device (host) that supports USB Can be supplied to other devices (USB terminals) that support USB.

On the other hand, in the case of the host including a general personal computer, in order to reduce the power consumed for the operation, to control the power management mode to supply only the power required according to the system operating state.

Therefore, the power used by the host is limited according to the power management mode of the host, and accordingly, the power that can be supplied to the USB terminal connected to the host through the USB is changed.

According to the USB-IF certification in relation to the USB power supply, when the host enters the standby mode, the USB terminal connected to the host through the USB should be host only with a high power device of 2.5 mA or less or a low power device of 500 uA or less. Power can be used.

Therefore, when the host enters the standby mode (SUSPEND MODE) for the power management used in the system while the host is turned on, the power that can be supplied through the USB port to the USB terminal connected to the host through the USB port Not only the battery installed in the USB terminal can be charged but also used as a power source for the operation of the USB terminal system.

Therefore, if the host connected through the USB port is left in the standby mode for a long time while the USB terminal is turned on, it causes the battery power, which is mainly used for the USB terminal, to be depleted. There is a possibility that a problem occurs that the user is unable to use the USB terminal as a result of exhaustion.

According to the present invention, when the host enters the standby mode while the USB terminal is turned on, the USB terminal automatically turns off the power when the host standby mode is longer than a predetermined time, thereby preventing battery power consumption. It is an object of the present invention to provide an apparatus and method for automatically turning off a USB terminal system in a host standby mode.

In addition, the present invention provides a user interface (GUI) that allows the user to select a reference time that the USB terminal should automatically wait to perform the power off, and the host enters the standby mode when the USB terminal is turned on If the host standby mode is longer than the reference time set by the user, the USB terminal automatically turns off the power to prevent the battery power consumption. And providing a method.

The apparatus for automatically turning off a USB terminal system in a host standby mode according to the present invention for achieving the above object includes a power supply unit for supplying power to a USB terminal system, and controlling output power of the power supply unit according to an operating state of the USB terminal system. A power management unit for converting the data received through the USB port into data of a form suitable for a system, and a standby mode state of a host connected from the data received through the USB interface unit. And a system control unit which applies a control signal to the power management unit to cut off the power supply from the power supply unit to the system when the standby mode state continues for a predetermined reference time.

The power supply unit may include a battery power supply unit, an external power input unit, and a power supply unit for selectively outputting power of the battery power unit and the external power input unit.

When the host connected through the USB port is in the standby mode, the power management unit may control the power supply to stop charging by the power supplied through the USB port.

A method for automatically turning off a USB terminal system in a host standby mode according to the present invention for achieving the above object is to turn off the power of the USB terminal after a set time has elapsed since the host to which the USB terminal is connected has entered the standby mode. It features.

In addition, the method for automatically turning off the USB terminal system in the host standby mode according to an embodiment of the present invention for achieving the above object, the step of detecting the standby mode state of the host connected to the USB terminal, the standby mode state is And determining whether to continue for a predetermined reference time, and controlling the on / off of the USB terminal according to the determination result.

In the detecting of the standby mode state, the host detects the standby mode state by analyzing packet information received through the USB.

After the detecting of the standby mode state, the step of turning off the charging function of the USB terminal is further performed.

After the detecting of the standby mode state, a function other than the timer and the USB may be further performed.

According to the apparatus and method for automatically turning off the USB terminal system in the host standby mode according to the present invention, the host standby mode is entered after the host connected to the USB terminal enters the standby mode while the USB terminal is turned on. When the predetermined time set by the user elapses, the power of the USB terminal is automatically turned off, thereby preventing the battery power from being exhausted.

Hereinafter, an apparatus and method for automatically turning off a USB terminal system in a host standby mode according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a view for explaining an embodiment of an apparatus for automatically turning off a USB terminal system in a host standby mode according to the present invention.

In the apparatus for automatically turning off the USB terminal system in the host standby mode according to the present invention, referring to FIG. 1, a power supply unit 120 for supplying power to a USB terminal system and an output of the power supply unit according to an operation state of the USB terminal system are provided. A power management unit 110 for controlling power, a USB interface unit 130 for converting data received through the USB port 131 into data of a form suitable for a system, and outputting the USB interface unit 130. Detects the standby mode state of the connected host from the received data and if the standby mode state continues for the set reference time, by applying a control signal to the power management unit to cut off the power supply from the power supply to the system to turn off the system It is configured to include a system control unit 100.

In detail, the power supply unit 120 supplies power from the battery power supply unit 121 and the external power input through the AC / DC adapter or the power supplied from the host 20 input through the USB port 131. It includes an external power input unit 122, and a power supply unit 123 for selectively outputting the power of the battery power unit 121 and the external power input unit 122.

When the host 20 connected through the USB port 131 is in the standby mode, the power management unit 110 controls the power supply unit 120 to charge by the power supplied through the USB port 131. Configured to abort.

Meanwhile, the user input unit 141 is configured to input a command for executing a predetermined function of the USB terminal and data for setting or changing a reference value required for executing the operation of the USB terminal, and includes a plurality of key buttons. It may be configured as a button unit or a touch panel.

The output unit 142 outputs a voice or video signal processed according to a predetermined function of the USB terminal. The output unit 142 includes a voice output unit for outputting a voice or sound, a display unit for outputting an image, and the like. Can be.

The I / O interface unit 140 converts data input and output through the user input unit 141 and the output unit 142 into data of a format used by the system, or data processed by the system or the system control unit 100. The command data output from the data is converted into data suitable for processing by the user input unit 141 and the output unit 142 and output.

The storage unit 150 stores program data necessary for the operation of the USB terminal, audio or video data, and data input by other users.

Hereinafter, an operation of the apparatus for automatically turning off a UE terminal system in a host standby mode according to the present invention configured as described above and a method for automatically turning off a UE system in a host standby mode using the same will be described in detail.

2 is a flowchart illustrating an embodiment of a method for automatically turning off a USB terminal system in a host standby mode according to the present invention.

1 and 2, the user connects the USB terminal 10 through the USB port 131 to receive power from the host 200 (S210).

When the USB terminal 10 is connected to the host 200 through the USB port 131, the host 200 exchanges a data packet every 125 us through the data terminal of the USB port 131. In step S220, the system control unit 100 of the USB terminal 10 determines whether the host 200 enters the standby mode.

Meanwhile, power is supplied to the USB terminal 10 through the power terminal of the USB port 131.

The host 20 power supplied through the power terminal of the USB port 131 is supplied to the external power input unit 122 of the power supply unit 120 and supplied to the system through the power supply unit 123, or the battery power supply unit 121. It is supplied to and used to charge the battery.

When the host 200 switches to the standby mode for power management during operation, the host 200 transmits information indicating that the host 200 has entered the standby mode by using a data packet exchanged every 125us. do.

According to the above process, the data packet including information indicating that the host 200 has entered the standby mode is input to the USB interface unit 130 through the data terminal of the USB port 131, and the USB The interface unit 130 processes the received data packet as data having a format suitable for the USB terminal 10 system, and outputs the data packet to the system controller 100.

The system controller 100 receives the data output from the USB interface unit 130 and processes the data to detect that the host 200 enters the standby mode.

As a result of the determination (S220), the system control unit 100 that detects that the host 200 enters the standby mode determines that the power that can be supplied from the host 200 is insufficient to charge the power management unit 110. The control signal is applied to the power management unit 110 to control the external power input unit 122 of the power supply unit 120 to turn off the charging function to the battery power (S230).

In addition, the system controller 100 applies a start signal to the timer 101 to count the elapsed time, and in addition to the timer 101 and the USB interface 130 to minimize the power consumed by the USB terminal 10. Switching to the sleep mode by cutting off the power supplied to the element (S240).

Thereafter, the system controller 100 refers to the host 150 through the USB port 131 and the USB interface 130 to determine whether the standby mode of the host 200 is released during the reference time set with reference to the storage 150. In step S250, it is determined whether the USB packet is transmitted.

Meanwhile, in the above process, the reference time set by the system controller 100 may be arbitrarily set by the user such as 30 minutes, 1 hour, 2 hours, and the like.

In order to set the reference time, the USB terminal 10 may provide a predetermined user interface screen or voice through the output unit 142.

In detail, when a user inputs a predetermined key signal through the user input unit 141 to set the reference time, the input signal is applied to the system controller 100 through the I / O interface unit 140. Accordingly, the system controller 100 outputs the user interface screen, etc. for setting the reference time through the output unit 142. Accordingly, a user inputs a desired time or selects a specific reference time displayed on the user interface screen, and the input or selected specific reference time information is stored in the storage unit 150, and the system controller 100 uses the same. do.

As a result of the determination (S250), when the USB packet is transmitted from the host 200, since the standby mode of the host 200 is released, the system controller 100 determines whether the host 200 enters the standby mode at a predetermined cycle. The process of determining is repeated (S220).

In this case, since the power supply from the host 200 is normally restored, the control signal is applied to the power management unit 110 so that the power management unit 110 controls the external power input unit 122 of the power supply 120 to supply battery power. It is preferable to turn on the charging function, and to release the sleep mode to resume power supply to the elements other than the timer 101 and the USB interface unit 130.

However, when the determination result (S250), the USB packet is not transmitted from the host 200, the power is cut off to turn off the system (S270).

On the other hand, the determination result (S250), even if the USB packet is not transmitted from the host 200, so that the user can perform other functions of the USB terminal as necessary, it is preferable not to turn off the system in this case. .

To this end, the determination result (S250), when the USB packet is not transmitted from the host 200 to determine whether a user command for executing another function is input (S260).

As a result of the check (S260), when a user command for executing another function is not input, the system is turned off by cutting off the power (S270).

However, when the check result (S260), when a user command for executing another function is input, the sleep mode is released to perform the corresponding function (S280), and the corresponding function input together is performed (S290). .

In the above, the apparatus and method for automatically turning off the USB terminal system in the host standby mode according to the present invention have been described in detail. However, the present invention is not limited to the above embodiments, and many variations are possible by those skilled in the art within the spirit of the present invention. Therefore, changes and modifications are included in the present invention without departing from the spirit of the invention, such facts will be apparent to those skilled in the art.

According to the present invention, when the host connected to the USB terminal enters the standby mode while the USB terminal is turned on, when the host standby mode becomes longer than a predetermined time, the power of the USB terminal is automatically turned off, thereby depleting the battery power. You can prevent it.

In addition, according to the present invention, it is possible to set a time for the user to automatically power off the USB terminal through the user interface (GUI) information, whether or not to perform the function according to the user's current use of the USB terminal By determining this, there is an effect of providing a user-centric USB terminal.

Claims (12)

A power supply unit for supplying power to the USB terminal system; A power management unit for controlling output power of the power supply unit according to an operation state of a USB terminal system; A USB interface unit for converting data received through a USB port into data of a form suitable for a system and outputting the data; And Detects the standby mode state of the host connected from the data received through the USB interface unit, and if the standby mode state continues for a predetermined reference time, by applying a control signal to the power management unit to cut off the power supply from the power unit to the system A system control unit for turning off the system; USB terminal system automatic off device in the host standby mode, characterized in that comprises a. The method of claim 1, The power supply unit, A battery power supply unit; An external power input unit for supplying power from a host input through a USB port or an external input through an AC / DC adapter; And And a power supply unit for selectively outputting power of the battery power unit and the external power input unit. 2. The method of claim 1, When the host connected through the USB port is in the standby mode, the power management unit controls the power supply unit to stop charging by the power supplied through the USB port. Device off. A method for automatically turning off a USB terminal system in a host standby mode, wherein the USB terminal is turned off after the set time has elapsed since the host connected to the USB terminal is in the standby mode. Detecting a standby mode state of a host to which a USB terminal is connected; Determining whether the standby mode state continues for a set reference time; And And controlling the on / off of the UBS terminal according to the determination result. The method of claim 5, The detecting of the standby mode state may include analyzing the packet information received through the USB to detect the standby mode state of the host. The method of claim 5, After the detecting of the standby mode, turning off the charging function of the USB terminal is further performed. The method of claim 5, After the step of detecting the standby mode state, a function other than a timer and a USB is further switched to a sleep mode. The method of claim 5, The controlling of the ON / OFF of the UE terminal according to the determination result may include controlling to turn off the UE terminal when the standby mode state continues for a predetermined reference time. The method of claim 5, The controlling of the on / off of the UE terminal according to the determination result, if the standby mode state does not continue for a set reference time to repeat the step of detecting the standby mode state of the host at a predetermined period. The method of claim 10, If the standby mode state does not continue for a predetermined reference time, resuming the charging function of the USB terminal is further performed. The method of claim 10, If the standby mode state does not continue for a predetermined reference time, releasing the sleep mode of the USB terminal is further performed.
KR1020070000336A 2007-01-02 2007-01-02 Apparatus and method for auto system on/off control in usb device KR20080063667A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102221872A (en) * 2010-04-16 2011-10-19 宏碁股份有限公司 Power supplying device and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102221872A (en) * 2010-04-16 2011-10-19 宏碁股份有限公司 Power supplying device and method

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