WO2009056370A1 - Arrangement comprising a first electronic device and a power supply unit and method for operating an electronic device - Google Patents

Arrangement comprising a first electronic device and a power supply unit and method for operating an electronic device Download PDF

Info

Publication number
WO2009056370A1
WO2009056370A1 PCT/EP2008/056431 EP2008056431W WO2009056370A1 WO 2009056370 A1 WO2009056370 A1 WO 2009056370A1 EP 2008056431 W EP2008056431 W EP 2008056431W WO 2009056370 A1 WO2009056370 A1 WO 2009056370A1
Authority
WO
WIPO (PCT)
Prior art keywords
electronic device
power supply
arrangement
supply unit
unit
Prior art date
Application number
PCT/EP2008/056431
Other languages
French (fr)
Inventor
Wen Shih Chen
Jukka Pensola
Original Assignee
Fujitsu Siemens Computers Gmbh
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 Fujitsu Siemens Computers Gmbh filed Critical Fujitsu Siemens Computers Gmbh
Priority to EP08760030A priority Critical patent/EP2208125A1/en
Priority to JP2010531476A priority patent/JP2011503692A/en
Priority to PCT/EP2008/064890 priority patent/WO2009056649A1/en
Publication of WO2009056370A1 publication Critical patent/WO2009056370A1/en
Priority to US12/770,151 priority patent/US8098242B2/en

Links

Classifications

    • 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
    • G06F1/263—Arrangements for using multiple switchable power supplies, e.g. battery and AC
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
    • G03G15/5004—Power supply control, e.g. power-saving mode, automatic power turn-off
    • 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
    • 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
    • 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
    • G06F1/3228—Monitoring task completion, e.g. by use of idle timers, stop commands or wait commands
    • 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
    • G06F1/3265—Power saving in display device
    • 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
    • G06F1/3296—Power saving characterised by the action undertaken by lowering the supply or operating voltage
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2092—Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • G09G3/2096—Details of the interface to the display terminal specific for a flat panel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00885—Power supply means, e.g. arrangements for the control of power supply to the apparatus or components thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00885—Power supply means, e.g. arrangements for the control of power supply to the apparatus or components thereof
    • H04N1/00888—Control thereof
    • H04N1/00893—Control thereof using a back-up supply, e.g. in case of main-supply failure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00885—Power supply means, e.g. arrangements for the control of power supply to the apparatus or components thereof
    • H04N1/00888—Control thereof
    • H04N1/00896—Control thereof using a low-power mode, e.g. standby
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/00885—Power supply means, e.g. arrangements for the control of power supply to the apparatus or components thereof
    • H04N1/00901—Using different supplies or connection to an external supply
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G09G2330/022—Power management, e.g. power saving in absence of operation, e.g. no data being entered during a predetermined time
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/0077—Types of the still picture apparatus
    • H04N2201/0091—Digital copier; digital 'photocopier'
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate

Definitions

  • Arrangement comprising a first electronic device and a power supply unit and method for operating an electronic device
  • the present application relates to an arrangement comprising a first electronic device and a power supply unit adapted to provide the first electronic device with electrical operating energy from a mains voltage. More particularly, the present application relates to electronic devices having at least one energy saving state.
  • an internal or external power supply unit for the provision of electrical operating energy from a mains voltage.
  • computer screens such as LCD monitors, printers or scanners are usually connected to a mains voltage for operation.
  • electronic devices comprise at least one energy saving state, in which most of the functionality of the device is disabled. In such energy saving states, the electric power consumption of the electronic device is greatly reduced.
  • an LCD monitor having a typical power consumption of 40 W when in operation may only consume power of 2 to 4 W in a so-called stand-by mode by deactivating a background illumination unit and/or a scaling unit.
  • the electronic device still needs to be supplied with at least some electrical energy. This is partly so because the elec- tronic device needs to monitor input elements or connections in order to determine whether it is time to return to a full operating mode. For example, a printer may monitor a network port to observe if there is any new print job available. Because power supply units typically have a lower efficiency, if only a fraction of the nominal output power is consumed, the total loss of energy in stand-by mode may be substantial.
  • an arrangement comprising a first electronic device and a power supply unit adapted to provide the first electronic device with electric operating energy from a mains voltage.
  • the first electronic device comprises an evaluation unit coupled to the power supply unit and adapted to switch the first electronic device from an operating state into at least one energy saving state, and vice-versa. It is further adapted to turn off the power supply, if the first electronic device is switched into the energy saving state, and to turn on the power supply if the first electronic device is switched into the operating state.
  • the first electronic device further comprises a standard interface for connecting the first electronic device to a second electronic device, the standard interface being adapted to supply the evaluation unit with electric auxiliary energy received from the second electronic device.
  • an evaluation unit By enabling an evaluation unit to switch off a power supply unit in at least one energy saving state, the power consumption of the power supply unit can be reduced to zero. Furthermore, in order to enable continued operation of the evaluation unit, an auxiliary electric energy is provided from a second electronic device by means of a standard interface .
  • the standard interface includes an auxiliary voltage line, and the evaluation unit is connected to the auxiliary voltage line.
  • auxiliary voltage lines are available in many standard interfaces, such as graphics interfaces or peripheral interfaces and en- able to provide the evaluation unit with the auxiliary energy in an easy and power-efficient way.
  • the evaluation unit is coupled with a timer for determining an idle period of the first or second electronic device.
  • the timer is arranged in the second electronic device and the coupling with the evaluation unit is implemented via the standard interface.
  • the standard interface is a graphics interface, for example a VGA, a DVI, HDMI, a display port or a SCART/AV interface, adapted to connect the first electronic device with the second electronic device, the second electronic device being a computer or a receiver .
  • the image source In an arrangement comprising an image source such as a computer, a receiver or another electronic device connected by means of a graphics interface, the image source usually controls and provides signals for the activation and deactiva- tion of energy saving states of the first electronic device.
  • auxiliary energy from the image source may be used to supply the first electronic device with the required electric auxiliary energy.
  • the first electronic device is a display device, comprising a display screen and a scaling unit, wherein the scaling unit is coupled to the graphics interface and the display screen, the scaling unit being adapted to generate an output signal for the display screen based on a graphics signal received from the graphics interface.
  • the evaluation unit is integrated into the scaling unit.
  • the scaling unit comprises a microcontroller connected to the graphics interface for supplying the microcontroller with an operating energy in the power saving state, wherein the microcontroller is adapted to perform the function of the evaluation unit.
  • the microcontroller is further adapted to generate at least one control signal for the scaling unit in the operating mode.
  • the evaluation unit can be easily implemented.
  • a microcontroller used to generate control signals in the operating mode is also used to control the power supply in the energy saving mode, no further components are needed to implement the evaluation device.
  • the power supply comprises a switching element for controlling the power supply unit connected to the first electronic device, and the evaluation unit is adapted to open the switching element in the energy saving state. By opening the switching element in the energy saving state, the power supply unit can be deactivated.
  • the switching element is arranged in a primary supply line arranged between a mains voltage and a power supply unit, and the power supply unit is turned off by opening the switching element.
  • the switching element comprises a relay for electrically disconnecting the mains voltage from the power supply unit.
  • a bypass switch is arranged in parallel to the switching element, adapted to connect the power supply unit with the mains voltage.
  • the power supply unit may be reactivated manu- ally.
  • the power supply unit comprises a switching power converter and the switching element comprises at least one semiconductor switch for controlling the duty cycle of the switching power converter using a pulse width modulated control signal, and the power supply unit is turned off by deactivating the pulse width modulated control signal.
  • the power supply unit is turned off by deactivating a pulse width modulated control signal.
  • the pulse width modulated control signal is provided by a microcontroller of the evaluation unit.
  • a microcontroller of the evaluation unit By integrating the generation of the pulse width modulated control signal with the other functionality of the evaluation unit, the number or components required to implement the arrangement with the energy saving state can be further reduced. In fact, in an electronic device already comprising a microcontroller controlled switching power supply, no further electrical components may be required.
  • a method for operating a first electronic device having a power saving state and an operating state comprises the steps of:
  • FIG. 1 shows a schematic illustration of an arrangement comprising a first and a second electronic device.
  • FIG. 2 shows a flow chart of a method for operating the first electronic device.
  • FIG. 1 shows an arrangement 1 comprising a first electronic device 2.
  • the first electronic device 2 is coupled with a second electronic device 3.
  • the second electronic device 3 may be, for example, a computer or similar electronic device.
  • the first electronic device 2 may be a peripheral electronic device, for example a computer monitor or a printer.
  • the first electronic device 2 and the second electronic device 3 are coupled by one or more standard interfaces 4.
  • four standard interfaces 4a to 4d are available for connecting the first electronic device 2 with the second electronic device 3.
  • the first standard interface 4a may be a display port interface
  • the second standard interface 4b may be a VGA interface
  • the third standard interface 4c may be a DVI interface
  • the fourth standard interface 4d may be an HDMI interface.
  • FIG. 1 further shows that the first electronic device comprises four first connectors 5a to 5d and that the second electronic device 3 comprises four second connectors 6a to 6d corresponding to the standard interfaces 4a to 4d, respectively.
  • first electronic device 2 and the second electronic device 3 may have different numbers and types of standard interfaces 4 and first and second connectors 5 and 6, respectively.
  • first and second connectors 5 and 6 respectively.
  • the first electronic device 2 is connected with a power sup- ply unit 7, which may be internal or external to the first electronic device 2.
  • the power supply unit 7 couples the first electronic device 2 with a mains voltage 10.
  • the power supply unit 7 comprises an AC/DC power module 11, a latching relay 12, a switch 13, and a capacitor 14.
  • the relay 12 or the switch 13 may be used to connect the AC/DC power module with one or two contacts of the mains voltage 10. If both the switch 13 and the relay 12 are opened, the AC/DC power module 11 is physically disconnected from the mains voltage 10 and hence will consume no electrical energy. By opening the switch 13, the first electronic device can be put into a energy saving mode as described below, by closing it, it operates like a conventional device.
  • the first electronic device 2 comprises a sealer board 8 and an LCD panel 9.
  • the sealer board 8 comprises a sealer chip 15, a DC/DC converter 16 and a microcontroller 17.
  • the sealer chip 15 is adapted to scale analog or digital data received from one of the standard interface 4a to 4d in order to generate appropriate driving signals for the LCD panel 9.
  • the integrated circuit MST 6251DA-LF-165 by MStar may be used.
  • the DC/DC converter 16 is adapted to convert an auxiliary voltage V AUX provided from one of the standard interfaces 4a to 4d to an operational voltage V C c provided to the microcontroller 17.
  • the microcontroller 17 is adapted to monitor interrupt lines 18 and 19 connected to the standard interfaces 4 and the AC/DC power module 11, respectively.
  • the first interrupt line 18 is connected, for example, to a vertical and/or horizontal synchronization signal which is part of one or several of the standard interfaces 4a to 4d. If the microcontroller 17 observes an interrupt on the first interrupt line 18, for example a falling or rising flank because a horizontal and/or vertical synchronization signal is provided via the VGA interface 4b, it may close the relay 12 of the power supply unit 7 by means of a control line 20.
  • the second interrupt line 19 indicates whether the AC/DC power module 11 is provided with an AC input voltage, i.e. the mains voltage 10. That is, the second interrupt line 19 indicated whether the relay 12 or the switch 13 are closed.
  • the first electronic device is switched into an operating state by the microcontroller 17. Otherwise, it is switched into a energy saving state, in which the microcontroller is either supplied by the second electronic device 3 with auxiliary energy only or completely switched off.
  • the microcontroller 17 may also close the relay 12 to permanently activate the power supply unit 7 independently from the second electronic device 3. In this way, the microcontroller 17 may activate the power supply unit 7, which was previously disconnected from the mains voltage 10 in order to power up the first electronic device 2 in general and the sealer board 8 in particular. Conversely, if the microcontroller 17 detects by means of the first interrupt line 18 or by means of a idle- timer, that the first electronic device 2 should be deactivated, it may open the relay 12 by means of the control line 20 and consequently isolate the AC/DC power module 11 from the mains voltage 10. In order to operate the microcontroller 17 independently from the power supply unit 7, a low energy microcontroller 17 should be used, for example a Myson CS8955 microcontroller.
  • the microcontroller 17 may be used to control and provide the energy for the operation of the relay 12 directly, i.e. without a further amplification circuit.
  • the capacitor 14 may be used to supply the energy needed for the state change of the latching relay 12.
  • Typical microcontroller electrical current driving capability i.e. their power output, is limited and may not be sufficient for the relay operation, i.e. a latching relay state change.
  • the relay coil latching power draw is typically 150 mW to 200 mW.
  • the maximum output power of a general purpose output pin of a microcontroller is typically less than the needed power for the relay latching. For example, its power output is less than 40 mW typically.
  • the serial capacitor 14 arranged parallel to latching relay 12 may be charged by the microcontroller 17. Then, the serial capacitor finally provides the previously stored power necessary for the relay latching operation . - l i ⁇
  • VESA DPMS sleep mode an electrical auxiliary energy is provided by a graphics component of a computer.
  • the power supply unit 7 of the first electronic device 2 e.g. an LCD monitor
  • the electrical auxiliary energy may be deactivated, limiting the power consumption of the first electronic device to the electrical auxiliary energy, e.g. to below 250 mW.
  • VESA DPMS off mode i.e. if the computer is switched into standby or completely turned off, the electrical auxiliary energy is also tunred off, thus reducing the energy consumption of the first electrical device to zero. Nevertheless, the first electronic device 2 may be woken up and turned into the operating state without any user interaction as described below.
  • FIG. 2 shows a flow chart of a method for operating the first electronic device 2 according to an embodiment of the invention .
  • an auxiliary voltage V AUX is received by means of a standard interface 4 connecting the first electronic device 2 to a second electronic device 3.
  • the display port connector 5a receives a voltage of 3.3 V with a maximum load of 500 mA on pin 20.
  • the VGA connector 5b receives an auxiliary voltage of 5 V with a maximum load of 50 mA on pin 8.
  • the DVI connector 5c receives an auxiliary voltage of 5 V and a maximum load of 50 mA on pin 14.
  • the HDMA connector 5d receives an auxiliary voltage of 5 V and a maximum load of 50 mA on pin 18. In this way, an auxiliary energy of at least 250 mW can be obtained by means of any one of the standard interfaced 4a to 4d.
  • auxiliary voltages may also provide auxiliary voltages.
  • an USB port often used to connect other peripheral devices to a computer system provides a voltage of 5 V on pin 1.
  • Other standard interfaces such as serial or parallel ports or IEEE 1394 interfaces also provide voltages of 3.3 or 5 V.
  • electrical energy comprised in other types of signals, such as a clock signal may be converted into an auxiliary electrical energy, for example by rectifying an alternating current component or smoothing a modulated signal into a direct current.
  • an evaluation unit of the first electronic device 2 is operated.
  • the microcontroller chip 17 acts as an evaluation unit and is operated using the auxiliary energy received from one of the standard interfaces 4.
  • the DC/DC converter 16 is used.
  • a down converter converting the various auxiliary voltages provided by the first connectors 5a to 5d down to a common voltage of 3 V may be used.
  • a power saving mode that is when the power supply unit 7 is deactivated, only very few functional elements of the first electronic device 2 in general and the sealer board 8 in particular are provided with the auxiliary power generated by the DC/DC converter 16.
  • the sealer chip 15 is completely deactivated.
  • the microcontroller 17 may be op- erated at a lower voltage or lower operating frequency than in a fully switch-on mode.
  • further components of the sealer board 8 not shown in FIG. 1, such as analog to digital converters of low-voltage differential signaling circuits may be deactivated.
  • the evaluation unit detects an activa- tion signal.
  • the microcontroller 17 might detect that a synchronization signal is provided via one of the standard interfaced 4a to 4d by means of the first interrupt line 18.
  • another activation signal may be received from the power supply unit 7 itself or from a timer circuit integrated into the microcontroller 17.
  • the microcontroller 17 activates the power supply unit 7 and the sealer board 8 at predetermined time intervals in order to actively supervise one of the standard interfaces 4a to 4d, if no wake-up signal in form of a synchronization signal is provided by the second electronic device 3 via the standard interfaces 4a to 4d, .
  • the power supply unit 7 is switched on.
  • the AC/DC power module 11 may be connected to the mains voltage 10.
  • the relay 12 is closed.
  • the relay 12 is implemented as a latching optoelectrical relay, a solid state relay, or an electromechanical latching type relay.
  • Latching relays have the advantage that they do not require energy in order to remain in a particular switching state.
  • Use of an optoelectrical relay or solid state relay has the advantage that the wear of the relay is greatly reduced with respect to electromechanical relay. Consequently, the operation of the relay 12 can be guaranteed over a longer period of time.
  • a capacitor 14 may be charged before, in a second phase, the relay 12 is switched using the previously stored energy.
  • the power supply unit provides an operating voltage V 3 to the electronic device 2.
  • the AC/DC power module 11 generates a supply voltage V 3 to operate the sealer board 8.
  • the evaluation unit for example the microcontroller 17, also receives a feedback signal from the AC/DC power module 11 to confirm that the power supply unit 7 is now switched on and the first electronic device 2 is in an operational mode. In this mode, the microcontroller 17 may continue to monitor the standard interfaced 4a to 4d in order to detect the switch-off signal received from the second electronic device 3. In this case, the evaluation unit 4 may deactivate the power supply unit 7 by means of the control line 20 and the relay 12. This step is not, however, shown in FIG. 2.
  • the microcontroller 17 controls the operation of the AC/DC power module 11.
  • the AC/DC power module 11 may comprise a switching power converter and the microcontroller 17 may provide a pulse width modulated control signal via a general purpose I/O (GPIO) pin in order to regulate the switching power converter.
  • GPIO general purpose I/O
  • a feedback pin from the power supply 7, such as the control line 19 may be used to control the operation of the AC/DC power module 11.
  • the microcontroller 17 may completely deactivate the pulse width modulated control signal and conse- quently deactivate the power supply unit 7. In this case, no additional relay 12 may be required in the power supply unit 7.
  • a relay 12 arranged between the AC mains voltage 10 and an input of the AC/DC power module 11 and a switching element arranged at or close to the output of the AC/DC power module 11 may be deactivated by the microcontroller 17.
  • the power supply unit 7 may be internal or external to the first electronic device 2.
  • functional elements shown as separate components in FIG. 1 may be integrated into one semiconductor circuit or separated into sev- eral semiconductor circuits.
  • the functionality of the sealer chip 15 and the microcontroller 17 may be integrated into one common chip, as long as the functional area responsible for the scaling of the received data signal can be deactivated.
  • circuit and method described above are not restricted to an arrangement comprising a computer and a connected monitor or other peripheral devices. Equally, they may be used with any arrangement comprising a first electronic device acting as a slave and a second electronic device acting as a master.

Abstract

Arrangement comprising a first electronic device and a power supply unit and method for operating an electronic device The present invention relates to an arrangement comprising a first electronic device and a power supply unit adapted to provide the first electronic device (2) with electric operating energy from a mains voltage (10). The first electronic device (2) comprises an evaluation unit adapted to switch the first electronic device (2) from an operating state to at least one energy saving state and vice-versa, and a standard interface for connecting the first electronic device (2) to a second electronic device (3). Furthermore, the present invention relates to a method for operating a first electronic device (2) as described above.

Description

Description
Arrangement comprising a first electronic device and a power supply unit and method for operating an electronic device
The present application relates to an arrangement comprising a first electronic device and a power supply unit adapted to provide the first electronic device with electrical operating energy from a mains voltage. More particularly, the present application relates to electronic devices having at least one energy saving state.
Many electronic devices make use of an internal or external power supply unit for the provision of electrical operating energy from a mains voltage. For example, computer screens, such as LCD monitors, printers or scanners are usually connected to a mains voltage for operation. Often such electronic devices comprise at least one energy saving state, in which most of the functionality of the device is disabled. In such energy saving states, the electric power consumption of the electronic device is greatly reduced. For example, an LCD monitor having a typical power consumption of 40 W when in operation, may only consume power of 2 to 4 W in a so-called stand-by mode by deactivating a background illumination unit and/or a scaling unit.
However, even in stand-by or other energy saving states, the electronic device still needs to be supplied with at least some electrical energy. This is partly so because the elec- tronic device needs to monitor input elements or connections in order to determine whether it is time to return to a full operating mode. For example, a printer may monitor a network port to observe if there is any new print job available. Because power supply units typically have a lower efficiency, if only a fraction of the nominal output power is consumed, the total loss of energy in stand-by mode may be substantial.
It is one object of the present invention to reduce the energy consumption of electronic devices in an energy saving state. It is a particular challenge to improve the energy consumption of electronic devices in an energy saving state to zero or close to zero Watt.
According to a first embodiment of the invention, an arrangement comprising a first electronic device and a power supply unit adapted to provide the first electronic device with electric operating energy from a mains voltage is provided. Therein, the first electronic device comprises an evaluation unit coupled to the power supply unit and adapted to switch the first electronic device from an operating state into at least one energy saving state, and vice-versa. It is further adapted to turn off the power supply, if the first electronic device is switched into the energy saving state, and to turn on the power supply if the first electronic device is switched into the operating state. The first electronic device further comprises a standard interface for connecting the first electronic device to a second electronic device, the standard interface being adapted to supply the evaluation unit with electric auxiliary energy received from the second electronic device.
By enabling an evaluation unit to switch off a power supply unit in at least one energy saving state, the power consumption of the power supply unit can be reduced to zero. Furthermore, in order to enable continued operation of the evaluation unit, an auxiliary electric energy is provided from a second electronic device by means of a standard interface .
According to an advantageous embodiment, the standard interface includes an auxiliary voltage line, and the evaluation unit is connected to the auxiliary voltage line. Such auxiliary voltage lines are available in many standard interfaces, such as graphics interfaces or peripheral interfaces and en- able to provide the evaluation unit with the auxiliary energy in an easy and power-efficient way.
According to a further embodiment, the evaluation unit is coupled with a timer for determining an idle period of the first or second electronic device. In a further embodiment, the timer is arranged in the second electronic device and the coupling with the evaluation unit is implemented via the standard interface. By providing a timer, either in the first or second electronic device, coupled with the evaluation unit, an energy saving state may be activated by the evaluation unit after a predetermined period of time.
According to a further advantageous embodiment, the standard interface is a graphics interface, for example a VGA, a DVI, HDMI, a display port or a SCART/AV interface, adapted to connect the first electronic device with the second electronic device, the second electronic device being a computer or a receiver .
In an arrangement comprising an image source such as a computer, a receiver or another electronic device connected by means of a graphics interface, the image source usually controls and provides signals for the activation and deactiva- tion of energy saving states of the first electronic device. In this case, auxiliary energy from the image source may be used to supply the first electronic device with the required electric auxiliary energy.
According to a further advantageous embodiment, the first electronic device is a display device, comprising a display screen and a scaling unit, wherein the scaling unit is coupled to the graphics interface and the display screen, the scaling unit being adapted to generate an output signal for the display screen based on a graphics signal received from the graphics interface. According to a further embodiment, the evaluation unit is integrated into the scaling unit. By integrating the evaluation unit into a display device in gen- eral, or into a scaling unit in particular, the evaluation unit can be included in the electronic comprised in an ordinary display device.
According to a further embodiment, the scaling unit comprises a microcontroller connected to the graphics interface for supplying the microcontroller with an operating energy in the power saving state, wherein the microcontroller is adapted to perform the function of the evaluation unit. According to a further embodiment, the microcontroller is further adapted to generate at least one control signal for the scaling unit in the operating mode.
By providing a microcontroller in the scaling unit, the evaluation unit can be easily implemented. In particular, if a microcontroller used to generate control signals in the operating mode is also used to control the power supply in the energy saving mode, no further components are needed to implement the evaluation device. According to a further advantageous embodiment, the power supply comprises a switching element for controlling the power supply unit connected to the first electronic device, and the evaluation unit is adapted to open the switching element in the energy saving state. By opening the switching element in the energy saving state, the power supply unit can be deactivated.
According to a further advantageous embodiment, the switching element is arranged in a primary supply line arranged between a mains voltage and a power supply unit, and the power supply unit is turned off by opening the switching element. According to a further embodiment, the switching element comprises a relay for electrically disconnecting the mains voltage from the power supply unit. By using a switching element arranged in a primary supply line, for example a relay, the power supply unit can be electrically disconnected from the mains voltage .
According to a further embodiment, a bypass switch is arranged in parallel to the switching element, adapted to connect the power supply unit with the mains voltage. By using a bypass switch, the power supply unit may be reactivated manu- ally.
According to a further advantageous embodiment, the power supply unit comprises a switching power converter and the switching element comprises at least one semiconductor switch for controlling the duty cycle of the switching power converter using a pulse width modulated control signal, and the power supply unit is turned off by deactivating the pulse width modulated control signal. By deactivating a pulse width modulated control signal, a switching power converter can be switched off without the need for any further components in the power supply unit.
According to a further embodiment, the pulse width modulated control signal is provided by a microcontroller of the evaluation unit. By integrating the generation of the pulse width modulated control signal with the other functionality of the evaluation unit, the number or components required to implement the arrangement with the energy saving state can be further reduced. In fact, in an electronic device already comprising a microcontroller controlled switching power supply, no further electrical components may be required.
According to second aspect, a method for operating a first electronic device having a power saving state and an operating state is provided. The method comprises the steps of:
receiving electric auxiliary energy from a second elec- tronic device by means of a standard interface connecting the first and the second electronic device,
operating an evaluation unit of the first electronic device with the received electric auxiliary energy,
detecting an activation signal using the evaluation unit, and
switching the first electronic device in the operating state by activating a power supply unit coupled to the evaluation unit for providing the first electronic device with electric operating energy. The method steps detailed above enable the activation of the first electronic device from an energy saving state without the need for a power supply unit of the first electronic device being powered all the time.
Further advantageous embodiments are described in the claims attached hereto and in the following detailed description.
An embodiment of the present invention is described with ref- erence to the following figures.
FIG. 1 shows a schematic illustration of an arrangement comprising a first and a second electronic device.
FIG. 2 shows a flow chart of a method for operating the first electronic device.
FIG. 1 shows an arrangement 1 comprising a first electronic device 2. The first electronic device 2 is coupled with a second electronic device 3. The second electronic device 3 may be, for example, a computer or similar electronic device. The first electronic device 2 may be a peripheral electronic device, for example a computer monitor or a printer.
The first electronic device 2 and the second electronic device 3 are coupled by one or more standard interfaces 4. In the embodiment shown in FIG. 1, four standard interfaces 4a to 4d are available for connecting the first electronic device 2 with the second electronic device 3. For example, the first standard interface 4a may be a display port interface, the second standard interface 4b may be a VGA interface, the third standard interface 4c may be a DVI interface, and the fourth standard interface 4d may be an HDMI interface. FIG. 1 further shows that the first electronic device comprises four first connectors 5a to 5d and that the second electronic device 3 comprises four second connectors 6a to 6d corresponding to the standard interfaces 4a to 4d, respectively. However, in practice, the first electronic device 2 and the second electronic device 3 may have different numbers and types of standard interfaces 4 and first and second connectors 5 and 6, respectively. For the arrangement 1 to oper- ate in accordance with the invention, it suffices if one compatible standard interface 4 is shared by the first and second electronic device 2 and 3.
The first electronic device 2 is connected with a power sup- ply unit 7, which may be internal or external to the first electronic device 2. The power supply unit 7 couples the first electronic device 2 with a mains voltage 10. For this purpose, the power supply unit 7 comprises an AC/DC power module 11, a latching relay 12, a switch 13, and a capacitor 14.
The relay 12 or the switch 13 may be used to connect the AC/DC power module with one or two contacts of the mains voltage 10. If both the switch 13 and the relay 12 are opened, the AC/DC power module 11 is physically disconnected from the mains voltage 10 and hence will consume no electrical energy. By opening the switch 13, the first electronic device can be put into a energy saving mode as described below, by closing it, it operates like a conventional device.
The first electronic device 2 comprises a sealer board 8 and an LCD panel 9. The sealer board 8 comprises a sealer chip 15, a DC/DC converter 16 and a microcontroller 17. The sealer chip 15 is adapted to scale analog or digital data received from one of the standard interface 4a to 4d in order to generate appropriate driving signals for the LCD panel 9. For example, the integrated circuit MST 6251DA-LF-165 by MStar may be used. The DC/DC converter 16 is adapted to convert an auxiliary voltage VAUX provided from one of the standard interfaces 4a to 4d to an operational voltage VCc provided to the microcontroller 17.
The microcontroller 17 is adapted to monitor interrupt lines 18 and 19 connected to the standard interfaces 4 and the AC/DC power module 11, respectively. The first interrupt line 18 is connected, for example, to a vertical and/or horizontal synchronization signal which is part of one or several of the standard interfaces 4a to 4d. If the microcontroller 17 observes an interrupt on the first interrupt line 18, for example a falling or rising flank because a horizontal and/or vertical synchronization signal is provided via the VGA interface 4b, it may close the relay 12 of the power supply unit 7 by means of a control line 20. The second interrupt line 19 indicates whether the AC/DC power module 11 is provided with an AC input voltage, i.e. the mains voltage 10. That is, the second interrupt line 19 indicated whether the relay 12 or the switch 13 are closed. If the second interrupt line 19 indicates an AC power, the first electronic device is switched into an operating state by the microcontroller 17. Otherwise, it is switched into a energy saving state, in which the microcontroller is either supplied by the second electronic device 3 with auxiliary energy only or completely switched off.
If, for example the switch 13 is closed, the microcontroller 17 may also close the relay 12 to permanently activate the power supply unit 7 independently from the second electronic device 3. In this way, the microcontroller 17 may activate the power supply unit 7, which was previously disconnected from the mains voltage 10 in order to power up the first electronic device 2 in general and the sealer board 8 in particular. Conversely, if the microcontroller 17 detects by means of the first interrupt line 18 or by means of a idle- timer, that the first electronic device 2 should be deactivated, it may open the relay 12 by means of the control line 20 and consequently isolate the AC/DC power module 11 from the mains voltage 10. In order to operate the microcontroller 17 independently from the power supply unit 7, a low energy microcontroller 17 should be used, for example a Myson CS8955 microcontroller.
The microcontroller 17 may be used to control and provide the energy for the operation of the relay 12 directly, i.e. without a further amplification circuit. In such an arrangement, the capacitor 14 may be used to supply the energy needed for the state change of the latching relay 12. Typical microcontroller electrical current driving capability, i.e. their power output, is limited and may not be sufficient for the relay operation, i.e. a latching relay state change. For example, the relay coil latching power draw is typically 150 mW to 200 mW. The maximum output power of a general purpose output pin of a microcontroller is typically less than the needed power for the relay latching. For example, its power output is less than 40 mW typically. In order to overcome this discrepancy, the serial capacitor 14 arranged parallel to latching relay 12 may be charged by the microcontroller 17. Then, the serial capacitor finally provides the previously stored power necessary for the relay latching operation . - l i ¬
lt should be noted that for display devices in particular, well-established energy saving modes exist. In particular, in the VESA DPMS sleep mode, an electrical auxiliary energy is provided by a graphics component of a computer. In this mode, the power supply unit 7 of the first electronic device 2, e.g. an LCD monitor, may be deactivated, limiting the power consumption of the first electronic device to the electrical auxiliary energy, e.g. to below 250 mW. In VESA DPMS off mode, i.e. if the computer is switched into standby or completely turned off, the electrical auxiliary energy is also tunred off, thus reducing the energy consumption of the first electrical device to zero. Nevertheless, the first electronic device 2 may be woken up and turned into the operating state without any user interaction as described below.
FIG. 2 shows a flow chart of a method for operating the first electronic device 2 according to an embodiment of the invention .
In a first step 21, an auxiliary voltage VAUX is received by means of a standard interface 4 connecting the first electronic device 2 to a second electronic device 3. For example, the display port connector 5a receives a voltage of 3.3 V with a maximum load of 500 mA on pin 20. The VGA connector 5b receives an auxiliary voltage of 5 V with a maximum load of 50 mA on pin 8. The DVI connector 5c receives an auxiliary voltage of 5 V and a maximum load of 50 mA on pin 14. The HDMA connector 5d receives an auxiliary voltage of 5 V and a maximum load of 50 mA on pin 18. In this way, an auxiliary energy of at least 250 mW can be obtained by means of any one of the standard interfaced 4a to 4d. Other types of standard interfaces may also provide auxiliary voltages. For example, an USB port often used to connect other peripheral devices to a computer system provides a voltage of 5 V on pin 1. Other standard interfaces such as serial or parallel ports or IEEE 1394 interfaces also provide voltages of 3.3 or 5 V. In addition, electrical energy comprised in other types of signals, such as a clock signal, may be converted into an auxiliary electrical energy, for example by rectifying an alternating current component or smoothing a modulated signal into a direct current.
In a second step 22, an evaluation unit of the first electronic device 2 is operated. In the exemplary embodiment shown in FIG. 1, the microcontroller chip 17 acts as an evaluation unit and is operated using the auxiliary energy received from one of the standard interfaces 4. In order to match the auxiliary voltage VAUX received from any one of the first connectors 5a to 5d to the power requirements of the microcontroller 17, the DC/DC converter 16 is used. For exam- pie, a down converter converting the various auxiliary voltages provided by the first connectors 5a to 5d down to a common voltage of 3 V may be used.
In a power saving mode, that is when the power supply unit 7 is deactivated, only very few functional elements of the first electronic device 2 in general and the sealer board 8 in particular are provided with the auxiliary power generated by the DC/DC converter 16. In particular, the sealer chip 15 is completely deactivated. The microcontroller 17 may be op- erated at a lower voltage or lower operating frequency than in a fully switch-on mode. In addition, further components of the sealer board 8 not shown in FIG. 1, such as analog to digital converters of low-voltage differential signaling circuits may be deactivated.
In a further step 23, the evaluation unit detects an activa- tion signal. For example, the microcontroller 17 might detect that a synchronization signal is provided via one of the standard interfaced 4a to 4d by means of the first interrupt line 18. Alternatively, another activation signal may be received from the power supply unit 7 itself or from a timer circuit integrated into the microcontroller 17. In a further embodiment, the microcontroller 17 activates the power supply unit 7 and the sealer board 8 at predetermined time intervals in order to actively supervise one of the standard interfaces 4a to 4d, if no wake-up signal in form of a synchronization signal is provided by the second electronic device 3 via the standard interfaces 4a to 4d, .
In a further step 24, the power supply unit 7 is switched on. For example, the AC/DC power module 11 may be connected to the mains voltage 10. According to the embodiment shown in FIG. 1, the relay 12 is closed. Preferably, the relay 12 is implemented as a latching optoelectrical relay, a solid state relay, or an electromechanical latching type relay. Latching relays have the advantage that they do not require energy in order to remain in a particular switching state. Use of an optoelectrical relay or solid state relay has the advantage that the wear of the relay is greatly reduced with respect to electromechanical relay. Consequently, the operation of the relay 12 can be guaranteed over a longer period of time. As detailed above, in a first phase, a capacitor 14 may be charged before, in a second phase, the relay 12 is switched using the previously stored energy. In a further step 25, the power supply unit provides an operating voltage V3 to the electronic device 2. In particular, the AC/DC power module 11 generates a supply voltage V3 to operate the sealer board 8. The evaluation unit, for example the microcontroller 17, also receives a feedback signal from the AC/DC power module 11 to confirm that the power supply unit 7 is now switched on and the first electronic device 2 is in an operational mode. In this mode, the microcontroller 17 may continue to monitor the standard interfaced 4a to 4d in order to detect the switch-off signal received from the second electronic device 3. In this case, the evaluation unit 4 may deactivate the power supply unit 7 by means of the control line 20 and the relay 12. This step is not, however, shown in FIG. 2.
In a preferred embodiment, the microcontroller 17 controls the operation of the AC/DC power module 11. In particular, the AC/DC power module 11 may comprise a switching power converter and the microcontroller 17 may provide a pulse width modulated control signal via a general purpose I/O (GPIO) pin in order to regulate the switching power converter. In order to enable a closed loop control of the switching power supply, a feedback pin from the power supply 7, such as the control line 19 may be used to control the operation of the AC/DC power module 11.
In the energy saving mode, if the power supply unit 7 is to be deactivated, the microcontroller 17 may completely deactivate the pulse width modulated control signal and conse- quently deactivate the power supply unit 7. In this case, no additional relay 12 may be required in the power supply unit 7. Of course, also a combination of both techniques may be applied. For example, a relay 12 arranged between the AC mains voltage 10 and an input of the AC/DC power module 11 and a switching element arranged at or close to the output of the AC/DC power module 11 may be deactivated by the microcontroller 17.
Furthermore, the power supply unit 7 may be internal or external to the first electronic device 2. Finally, functional elements shown as separate components in FIG. 1 may be integrated into one semiconductor circuit or separated into sev- eral semiconductor circuits. For example, the functionality of the sealer chip 15 and the microcontroller 17 may be integrated into one common chip, as long as the functional area responsible for the scaling of the received data signal can be deactivated.
Finally, the circuit and method described above are not restricted to an arrangement comprising a computer and a connected monitor or other peripheral devices. Equally, they may be used with any arrangement comprising a first electronic device acting as a slave and a second electronic device acting as a master.

Claims

Claims
1. Arrangement (1) comprising a first electronic device (2) and a power supply unit (7) adapted to provide the first electronic device (2) with electric operating energy from a mains voltage (10), wherein the first electronic device (2) comprises : an evaluation unit coupled to the power supply unit (7) adapted to switch the first electronic device (2) from an op- erating state into at least one energy saving state and vice- versa, to turn off the power supply (7) if the first electronic device (2) is switched in the energy saving state, and to turn on the power supply (7) if the first electronic device (2) is switched in the operating state, and a standard interface (4) for connecting the first electronic device (2) to a second electronic device (3), the standard interface (4) being adapted to supply the evaluation unit with an electric auxiliary energy received from the second electronic device (3) .
2. Arrangement (1) according to claim 1, wherein the standard interface (4) includes an auxiliary voltage line, and the evaluation unit is connected to the auxiliary voltage line.
3. Arrangement (1) according to claim 1 or 2, wherein the evaluation unit is coupled with a timer for determining an idle period of the first electronic device (2) or the second electronic device (3) .
4. Arrangement (1) according to claim 3, wherein the timer is arranged in the second electronic device (3) and the coupling with the evaluation unit is implemented via the standard interface (4) .
5. Arrangement (1) according to any one of the claims 1 to 4, wherein the standard interface (4) is a graphics interface, for example a VGA, DVI, HDMI, display port or a SCART/AV in- terface, adapted to connect the first electronic device (2) with the second electronic device (3) , the second electronic device (3) being a computer, a receiver or another image source .
6. Arrangement (1) according to claim 5, wherein the first electronic device (2) is a display device, comprising a display screen and a scaling unit, wherein the scaling unit is coupled to the graphics interface and the display screen, the scaling unit being adapted to generate an output signal for the display screen based on a graphics signal received from the graphics interface.
7. Arrangement (1) according to claim 6, wherein the evaluation unit is integrated into the scaling unit.
8. Arrangement (1) according to claim 7, wherein the scaling unit comprises a microcontroller (17) connected to the graphics interface for supplying the microcontroller (17) with an operating energy in the power saving state in the energy sav- ing state.
9. Arrangement (1) according to claim 8, wherein the microcontroller (17) is further adapted to generate at least one control signal for the scaling unit in the operating mode.
10. Arrangement (1) according to any one of the claims 1 to 9, wherein the power supply unit (7) is integrated into the first electronic device (2) .
11. Arrangement (1) according to any one of the claims 1 to 10, wherein the power supply unit (7) comprises a switching element for controlling the power supply unit (7) connected to the first electronic device (2), and the evaluation unit is adapted to open the switching element in the energy saving state .
12. Arrangement (1) according to claim 11, wherein the switching element is arranged in a primary supply line arranged between the mains voltage (10) and the power supply unit (7), and the power supply unit (7) is turned off by opening the switching element.
13. Arrangement (1) according to claim 12, wherein the switching element comprises a relay (12) for electrically disconnecting the mains voltage (10) from the power supply unit (7) .
14. Arrangement (1) according to claims 12 or 13, wherein a bypass switch (13) is arranged in parallel to the switching element, adapted to connect the power supply unit (7) with the mains voltage (10) .
15. Arrangement (1) according to claim 11, wherein the power supply unit (7) comprises a switching power converter and the switching power converter comprising at least one semiconductor switch for controlling a duty cycle of the switching power converter using a pulse width modulated control signal, and the power supply unit (7) is turned off by deactivating the pulse width modulated control signal.
16. Arrangement (1) according to claim 15, wherein the pulse width modulated control signal is provided by a microcontroller (17) of the evaluation unit.
17. Method for operating a first electronic device (2) having a power saving state and an operating state, comprising: receiving electric auxiliary energy from a second electronic device (3) by means of a standard interface (4) connecting the first electronic device (2) and the second electronic de- vice (3), operating an evaluation unit of the first electronic device (2) with a received electric auxiliary energy, detecting an activation signal using the evaluation unit, and switching the first electronic device (2) in the operating state by activating a power supply unit (7) coupled to the evaluation unit for providing the first electronic device (2) with electric operating energy.
18. Method according to claim 17, further comprising: detecting a deactivation signal using the evaluation unit, and switching the first electronic device (2) in the power saving state by deactivating the power supply unit (7) .
19. Method according to claims 17 or 18, wherein at least one of the activation or deactivation signals is provided by the second electronic device (3) via the standard interface (4) .
20. Method according to claim 19, wherein the provision of the electric auxiliary energy over the standard interface (4) serves as the activation signal.
21. Method according to claim 19, wherein the provision of at least one synchronization signal over the standard interface (4) serves as the activation signal.
PCT/EP2008/056431 2007-11-02 2008-05-26 Arrangement comprising a first electronic device and a power supply unit and method for operating an electronic device WO2009056370A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP08760030A EP2208125A1 (en) 2007-11-02 2008-05-26 Arrangement comprising a first electronic device and a power supply unit and method for operating an electronic device
JP2010531476A JP2011503692A (en) 2007-11-02 2008-05-26 Configuration comprising first electronic device and power supply unit, and operation method of electronic device
PCT/EP2008/064890 WO2009056649A1 (en) 2007-11-02 2008-11-03 Electronic device comprising an energy-saving state
US12/770,151 US8098242B2 (en) 2007-11-02 2010-04-29 Arrangement comprising a first electronic device and a power supply unit and method for operating an electronic device

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102007052881.9 2007-11-02
DE102007052881 2007-11-02
PCT/EP2008/052322 WO2009095085A1 (en) 2007-11-02 2008-02-26 Electronic device, computer, arrangement and method for actuating an electronic device
EPPCT/EP2008/052322 2008-02-26

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/770,151 Continuation US8098242B2 (en) 2007-11-02 2010-04-29 Arrangement comprising a first electronic device and a power supply unit and method for operating an electronic device

Publications (1)

Publication Number Publication Date
WO2009056370A1 true WO2009056370A1 (en) 2009-05-07

Family

ID=39496044

Family Applications (3)

Application Number Title Priority Date Filing Date
PCT/EP2008/052322 WO2009095085A1 (en) 2007-11-02 2008-02-26 Electronic device, computer, arrangement and method for actuating an electronic device
PCT/EP2008/056431 WO2009056370A1 (en) 2007-11-02 2008-05-26 Arrangement comprising a first electronic device and a power supply unit and method for operating an electronic device
PCT/EP2008/064890 WO2009056649A1 (en) 2007-11-02 2008-11-03 Electronic device comprising an energy-saving state

Family Applications Before (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/052322 WO2009095085A1 (en) 2007-11-02 2008-02-26 Electronic device, computer, arrangement and method for actuating an electronic device

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/064890 WO2009056649A1 (en) 2007-11-02 2008-11-03 Electronic device comprising an energy-saving state

Country Status (8)

Country Link
US (2) US8421277B2 (en)
EP (1) EP2206032B1 (en)
JP (2) JP5305307B2 (en)
KR (1) KR101180543B1 (en)
CN (1) CN101910974A (en)
DE (1) DE202007018449U1 (en)
TW (1) TWI398761B (en)
WO (3) WO2009095085A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20100875A1 (en) * 2010-11-03 2012-05-04 Indesit Co Spa STAND-BY CIRCUIT FOR APPLIANCES
JPWO2011033561A1 (en) * 2009-09-16 2013-02-07 Ｎｅｃディスプレイソリューションズ株式会社 Power consumption reduction circuit and power consumption reduction method

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202007018449U1 (en) * 2007-11-02 2008-10-02 Fujitsu Siemens Computers Gmbh Electronic device, computer and arrangement
US8160725B2 (en) * 2009-05-20 2012-04-17 Vega Grieshaber Kg Energy saving control for a field device
DE102010040398A1 (en) * 2010-09-08 2012-03-08 Tridonic Gmbh & Co. Kg Improvement of the energy efficiency of at least one light source having lighting system and corresponding lighting system
JP5800479B2 (en) * 2010-09-08 2015-10-28 キヤノン株式会社 Electronic device management system, control method for electronic device management system, and program
CN102055234A (en) * 2010-12-17 2011-05-11 福建捷联电子有限公司 Electronic product energy-saving implementation method and device
US8918662B2 (en) * 2011-01-04 2014-12-23 Motorola Mobility Llc System timeout reset based on media detection
TWI462006B (en) * 2011-01-11 2014-11-21 Mstar Semiconductor Inc Display system and associated control method
TWI439851B (en) * 2011-02-24 2014-06-01 E Ink Holdings Inc Low power consumption circuit and method for reducing power consumption
KR101566174B1 (en) 2011-03-02 2015-11-05 삼성전자 주식회사 Image processing apparatus and control method thereof
JP5058361B1 (en) * 2011-06-14 2012-10-24 株式会社東芝 Electronic device, display panel control device, and display panel control method
CN102411314A (en) * 2011-06-21 2012-04-11 兰如根 Energy-saving controller
KR101859219B1 (en) * 2011-07-25 2018-05-18 삼성디스플레이 주식회사 Display device and driving method thereof
JP5616868B2 (en) * 2011-09-21 2014-10-29 株式会社クボタ Electric motor control device and electric working machine
EP2600287A1 (en) * 2011-12-01 2013-06-05 Gemalto SA Electronic device including elements managed by various standardised protocols and method for managing communication between said elements
CN103794190B (en) * 2012-10-26 2016-08-10 纬创资通股份有限公司 There is the attachment means of electro-static discharge protection function
CN103793038B (en) * 2012-10-29 2016-06-01 英业达科技有限公司 Electronic installation and power control method
KR102000447B1 (en) * 2012-12-03 2019-07-16 엘지전자 주식회사 Multimedia device connected to at least one network and method for controlling the same
US9116875B2 (en) * 2012-12-10 2015-08-25 Infineon Technologies Ag Test circuit and method for processing a test routine
JP5708671B2 (en) * 2013-01-21 2015-04-30 コニカミノルタ株式会社 Power supply control device and power supply control system
US9538494B2 (en) 2013-11-26 2017-01-03 At&T Intellectual Property I, L.P. Time distance of arrival based mobile device location detection with disturbance scrutiny
CN103645661B (en) * 2013-12-03 2016-08-17 力合科技（湖南）股份有限公司 A kind of supply unit for instrument power managed
EP3102995B1 (en) 2014-02-05 2020-11-04 Fujitsu Client Computing Limited Display device, computer system and method for managing the operating states of a computer system
JP2016057788A (en) * 2014-09-08 2016-04-21 株式会社リコー Image processing apparatus and control method of image processing apparatus
CN105162077A (en) * 2015-10-13 2015-12-16 深圳市华星光电技术有限公司 Line protection circuit and LCD
US10757113B2 (en) 2017-03-17 2020-08-25 Cylance Inc. Communications bus signal fingerprinting
US10462155B2 (en) * 2017-03-17 2019-10-29 Cylance Inc. Electronic control unit protection framework using security zones
US10275615B2 (en) 2017-03-17 2019-04-30 Cylance Inc. Communications bus data transmission using relative ground shifting
US10304500B2 (en) * 2017-06-29 2019-05-28 Taiwan Semiconductor Manufacturing Co., Ltd. Power switch control for dual power supply
TWI757769B (en) * 2020-06-22 2022-03-11 國立虎尾科技大學 Signal detector, signal transmitter, power controller, and signal transmitting method thereof
TWI754981B (en) * 2020-07-03 2022-02-11 華碩電腦股份有限公司 Control circuit
DE102021112179A1 (en) 2021-05-10 2022-11-10 retesol GmbH Monitoring device for a data router and method for monitoring a data router

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2210217A (en) * 1987-09-23 1989-06-01 David Alexander Rippon Wallace Computer software controlled power supply switch
EP1199697A2 (en) * 1992-12-02 2002-04-24 Elonex I.P. Holdings Limited Low power-consumption monitor standby system
US20030204761A1 (en) * 2002-04-30 2003-10-30 D'alessio Samuel N. Power saving circuit
US20040085308A1 (en) * 2002-10-31 2004-05-06 Samsung Electronics Co., Ltd. Apparatus and method for controlling power of monitor

Family Cites Families (67)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5774116A (en) * 1992-01-31 1998-06-30 Siemens Nixdorf Informationssysteme Aktiengesellschaft Electric functional unit and cathode ray tube visual display unit
KR950005216B1 (en) * 1993-03-31 1995-05-22 삼성전자주식회사 Power saving apparatus for pc
US5548763A (en) * 1993-07-26 1996-08-20 International Business Machines Corporation Desk top computer system having multi-level power management
JP2767781B2 (en) * 1993-09-17 1998-06-18 東光株式会社 AC-DC converter
US5616988A (en) * 1994-08-19 1997-04-01 Hyundai Electronics Industries Co., Ltd. High energy-saving circuit for a display apparatus
JP3387668B2 (en) * 1994-11-28 2003-03-17 キヤノン株式会社 Computer peripheral equipment
US5659371A (en) * 1995-07-21 1997-08-19 Apple Computer, Inc. Method and apparatus for power supply startup in video monitors
IL116111A0 (en) * 1995-11-23 1997-11-20 Magnify Electronic Systems 199 Uninterruptible power system card
KR100234423B1 (en) * 1995-12-05 1999-12-15 윤종용 Apparatus and method for power control for computer peripheral
US5944830A (en) * 1996-03-08 1999-08-31 Samsung Electronics Co., Ltd. Reducing power consumption in monitor by switching off heater power in power-off mode
FI102701B1 (en) * 1996-05-06 1999-01-29 Nokia Display Products Oy Method for reducing power consumption in a monitor
KR100193737B1 (en) * 1996-07-19 1999-06-15 윤종용 Display device and its power supply control method
KR100225057B1 (en) * 1996-07-23 1999-10-15 윤종용 Control apparatus and method for power supply of monitor having audio system
KR100224085B1 (en) * 1996-08-14 1999-10-15 윤종용 Power saving display device and method for controlling power thereof
EP1355410A1 (en) 1997-04-30 2003-10-22 Fidelix Y.K. A power supply apparatus
KR19980066384U (en) * 1997-05-16 1998-12-05 윤종용 Low power circuit using electronic switch of display monitor
KR100303079B1 (en) * 1997-05-29 2001-11-22 윤종용 Device and method for power on/off of display monitor through microprocessor reset
US6125449A (en) * 1997-06-30 2000-09-26 Compaq Computer Corporation Controlling power states of a computer
KR19990009846A (en) * 1997-07-12 1999-02-05 윤종용 Locking device and method of computer system using U S B hub
KR100247393B1 (en) * 1997-09-02 2000-03-15 윤종용 Power supply control device of display device having pfc function
KR100265704B1 (en) * 1997-10-17 2000-09-15 윤종용 Cable manager system and computer with the same
JP3320350B2 (en) * 1997-12-08 2002-09-03 インターナショナル・ビジネス・マシーンズ・コーポレーション AC adapter that can reduce power consumption during standby
JP3587998B2 (en) * 1997-12-26 2004-11-10 株式会社リコー Power supply
US6098175A (en) * 1998-02-24 2000-08-01 Smartpower Corporation Energy-conserving power-supply system
KR100281529B1 (en) * 1998-04-11 2001-02-15 윤종용 Power supply control circuit of display device with universal serial bus device
JPH11305880A (en) * 1998-04-23 1999-11-05 Sony Corp Usb equipment and usb hub device
TW475140B (en) * 1998-04-29 2002-02-01 Samsung Electronics Co Ltd Analog/digital display adapter and a computer system having the same
KR100382636B1 (en) * 1998-07-15 2005-09-20 삼성전자주식회사 Apparatus for controlling a cooling fan of computer
JP3507710B2 (en) * 1998-09-11 2004-03-15 株式会社東芝 Power supply circuit in electrical equipment
JP2000092754A (en) * 1998-09-14 2000-03-31 Toshiba Corp Power circuit for electrical equipment
JP2000330494A (en) * 1999-05-17 2000-11-30 Sony Corp Picture display device
US6473078B1 (en) * 1999-05-26 2002-10-29 Nokia Display Products Oy Method and device for power consumption management of an integrated display unit
US6404423B1 (en) * 1999-07-09 2002-06-11 Nokia Display Products Oy Method for display power management and monitor equipped with a power management function
US6462437B1 (en) * 1999-11-12 2002-10-08 Koninklijke Philips Electronics N.V. System and method for alternating standby mode
EP1126586A1 (en) * 2000-02-11 2001-08-22 SCG France SAS Regulated auxiliary power supply
JP4622044B2 (en) * 2000-05-29 2011-02-02 パナソニック株式会社 Liquid crystal display device
TWI331439B (en) * 2000-08-29 2010-10-01 Benq Corp
US6769070B1 (en) * 2000-09-08 2004-07-27 Sony Corporation Standby circuit for digital display monitor
KR100376131B1 (en) * 2000-09-22 2003-03-15 삼성전자주식회사 Consumption power saving apparatus and controlling method in a stand-by mode
KR100349205B1 (en) * 2000-11-17 2002-08-21 삼성전자 주식회사 An apparatus for detecting a DVI connector in a digital video signal display system
EP1209793A1 (en) * 2000-11-23 2002-05-29 Semiconductor Components Industries LLC Apparatus and method for controlling a power supply
KR100369834B1 (en) * 2000-12-27 2003-01-30 삼성전자 주식회사 Power controlling system and method for display
US6697941B2 (en) * 2001-02-05 2004-02-24 Hewlett-Packard Development Company, L.P. Portable computer with configuration switching control
DE10106132A1 (en) * 2001-02-10 2002-08-14 Philips Corp Intellectual Pty Wake-up circuit for an electrical device
JP4080764B2 (en) * 2001-03-14 2008-04-23 株式会社リコー Power supply control apparatus and image forming apparatus
KR100418703B1 (en) * 2001-08-29 2004-02-11 삼성전자주식회사 display apparatus and controlling method thereof
JP2003118204A (en) * 2001-10-16 2003-04-23 Ricoh Co Ltd Printer
KR100471101B1 (en) * 2002-02-18 2005-03-08 삼성전자주식회사 Display device and method of controlling the same
KR100561158B1 (en) * 2002-06-25 2006-03-15 후지쯔 가부시끼가이샤 Display and power-saving controller
KR100470599B1 (en) * 2002-10-16 2005-03-10 삼성전자주식회사 Power supply capable of protecting electric device circuit
JP2004142224A (en) * 2002-10-23 2004-05-20 Konica Minolta Holdings Inc Image output unit
JP2004163455A (en) * 2002-11-08 2004-06-10 Fujitsu Ltd Display device and power saving controller
JP3873149B2 (en) * 2002-12-11 2007-01-24 株式会社日立製作所 Display device
JP2005049651A (en) * 2003-07-29 2005-02-24 Iiyama Corp Display device
US7173613B2 (en) * 2003-09-30 2007-02-06 Lenovosingapore Pte Ltd Peripheral device including a user interface for controlling a computer system unit optionally attached to the peripheral device
TWI278813B (en) * 2003-11-21 2007-04-11 Acer Inc Monitor capable of controlling the power of host computer and the controlling method therefor
US20060190632A1 (en) * 2005-02-11 2006-08-24 Mstar Semiconductor, Inc. Method for detecting DVI off-line mode and associated DVI receiver
JP2006048001A (en) * 2004-06-28 2006-02-16 Rohm Co Ltd Color display apparatus and semiconductor device therefor
CN100359418C (en) * 2004-07-05 2008-01-02 周先谱 Control device of zero power consumption readiness power source
US7273285B2 (en) * 2004-09-30 2007-09-25 Coretronics Corporation Method for managing lamp brightness
US7839409B2 (en) * 2004-10-18 2010-11-23 Ali Noorbakhsh Acquisition of extended display identification data (EDID) using inter-IC (I2C) protocol
CN1869877A (en) * 2005-05-28 2006-11-29 鸿富锦精密工业（深圳）有限公司 Electric saving device and method
US8126348B2 (en) * 2006-02-06 2012-02-28 Samsung Electronics Co., Ltd. Printing apparatus to reduce power consumption and control method thereof
DE102006021388A1 (en) * 2006-05-08 2007-11-15 Fujitsu Siemens Computers Gmbh Screen device and method for controlling a display device in a power saving state
US7916131B2 (en) * 2006-11-02 2011-03-29 Mitac Technology Corp. Process for monitor to operate in DPMS mode
US7743264B2 (en) * 2006-12-29 2010-06-22 Hewlett-Packard Development Company, L.P. Method and system of controlling operational state of a computer system via power button of a peripheral device
DE202007018449U1 (en) * 2007-11-02 2008-10-02 Fujitsu Siemens Computers Gmbh Electronic device, computer and arrangement

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2210217A (en) * 1987-09-23 1989-06-01 David Alexander Rippon Wallace Computer software controlled power supply switch
EP1199697A2 (en) * 1992-12-02 2002-04-24 Elonex I.P. Holdings Limited Low power-consumption monitor standby system
US20030204761A1 (en) * 2002-04-30 2003-10-30 D'alessio Samuel N. Power saving circuit
US20040085308A1 (en) * 2002-10-31 2004-05-06 Samsung Electronics Co., Ltd. Apparatus and method for controlling power of monitor

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ANONYMOUS: "VESA Display Power Management Signaling", 1993, XP002488072, Retrieved from the Internet <URL:http://en.wikipedia.org/wiki/VESA_Display_Power_Management_Signaling> [retrieved on 20080710] *
See also references of EP2208125A1 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2011033561A1 (en) * 2009-09-16 2013-02-07 Ｎｅｃディスプレイソリューションズ株式会社 Power consumption reduction circuit and power consumption reduction method
ITTO20100875A1 (en) * 2010-11-03 2012-05-04 Indesit Co Spa STAND-BY CIRCUIT FOR APPLIANCES
EP2458708A3 (en) * 2010-11-03 2013-01-16 Indesit Company S.p.A. Stand-by circuit for household appliances

Also Published As

Publication number Publication date
JP2011503692A (en) 2011-01-27
US8421277B2 (en) 2013-04-16
US20090200871A1 (en) 2009-08-13
EP2206032B1 (en) 2020-05-27
JP5305307B2 (en) 2013-10-02
TW200921359A (en) 2009-05-16
KR20100097127A (en) 2010-09-02
CN101910974A (en) 2010-12-08
EP2206032A1 (en) 2010-07-14
KR101180543B1 (en) 2012-09-06
WO2009095085A1 (en) 2009-08-06
US8098242B2 (en) 2012-01-17
JP2011504257A (en) 2011-02-03
DE202007018449U1 (en) 2008-10-02
WO2009056649A1 (en) 2009-05-07
TWI398761B (en) 2013-06-11
US20110001744A1 (en) 2011-01-06

Similar Documents

Publication Publication Date Title
US8098242B2 (en) Arrangement comprising a first electronic device and a power supply unit and method for operating an electronic device
EP2734906B1 (en) Power consumption limit associated with power over ethernet (poe) computing system
TWI455087B (en) Low power display control method and associated display controller
US20070124615A1 (en) Standby arrangement for power supplies
KR20150036380A (en) Low-power consumption standby circuit device, air conditioner and control method for air conditioner
TW200511698A (en) Power supply having efficient low power standby mode
US6297601B1 (en) Apparatus and method for saving electric power in a display system
US7707440B2 (en) Power supply unit for an electronic device such as an electronic device having a tuner
US20140013135A1 (en) System and method of controlling a power supply
US9705323B2 (en) Power supply system and power control circuit thereof
GB2313027A (en) Low power consumption video display unit
TWI444821B (en) Power apparatus
CN101599642A (en) Two-stage power supply system
EP2208125A1 (en) Arrangement comprising a first electronic device and a power supply unit and method for operating an electronic device
TW202209799A (en) Power supply with reduced power consumption and related electronic system
CN100544207C (en) Power switch circuit
CN216351859U (en) Standby circuit and single chip microcomputer
GB2346787A (en) Power supply module
TWI434163B (en) Power apparatus
KR100380009B1 (en) Power control apparatus for electric system
KR101926184B1 (en) Stanby power decrease apparatus of the monitor
KR100370046B1 (en) Apparatus for controlling power of video display system
CN103970244A (en) Electronic device and power management method
KR970001899Y1 (en) Power reduction circuit
JP2000217357A (en) Power supply module provided with power-saving control function

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08760030

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
REEP Request for entry into the european phase

Ref document number: 2008760030

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2008760030

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2010531476

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: DE