Classifications

• • G—PHYSICS
  • G06—COMPUTING OR CALCULATING; 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
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
  • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L12/00—Data switching networks
  • H04L12/02—Details
  • H04L12/10—Current supply arrangements
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
  • G09G2320/00—Control of display operating conditions
  • G09G2320/06—Adjustment of display parameters
  • G09G2320/0626—Adjustment of display parameters for control of overall brightness
• • 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
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
  • G09G2370/00—Aspects of data communication
  • G09G2370/02—Networking aspects
• • 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

Definitions

• An electronic device for connecting to an Ethernet network the invention relates to an electronic device for Connecting ⁇ SEN to an Ethernet network, wherein the electronic device comprises an Ethernet interface and a display.
• a device may be, for example, a conventional PC or other computer having its own working and hard disk storage and drives for readable media (CDs, DVDs, optical drives, etc.).
• each In such designated as "fat client" computers each Radiosys ⁇ tem as well as the required software is ⁇ stores even ge on the computer.
• the computer can be a laptop, a desktop computer or other design.
• the computer may further include keyboard or mouse or have appropriate ports for it.
• the electronic device may be a thin client or zero client, that do not require their own Festplattenspei ⁇ cher or other drives, and instead rely on external long-term and working memory that can be accessed over a network such as Ethernet.
• the operating system and the software for operating the Thin Client or Zero Client are also available.
• the electronic device has at least one interface for connection to an Ethernet network; this is in particular designed so that the electronic device also receives its power supply via the Ethernet network. It is thus a suitable for "Power over Ethernet" elekt ⁇ ronic device that except the Ethernet port no sepa ⁇ rate power source (such as a power plug or Power supply).
• the electronic device is playing, at ⁇ for data exchange and power supply via Power-over-Ethernet standard IEEE 802.3 af ( "PoE") or IEEE 802.3 set at ( “PoE +").
• PoE Power-over-Ethernet standard IEEE 802.3 af
• IEEE 802.3 set at ( “PoE +”
• the respective standards limit the maximum (net of losses remaining line) power output of the electronic device, for example, about 13 W (PoE), or approximately 25.5 W (PoE +) and ⁇ divorced further with respect to the bit transmission rates.
• the upper limits of the permitted net power are prescribed by the specification or protocol of Ethernet or Power over Ethernet. If an terminal device exceeds the power ⁇ limit, it is switched off by the network, such as the next switch or midspan. Therefore, a terminal that is compatible with Power over Ethernet (end user or power consumer) must ensure that it never exceeds the permitted power consumption.
• a problem is operating via Power over Ethernet in such electronic devices that contain a display and have to provide sufficient power, because depending on the display brightness, a high power consumption or power consumption may arise, the only so far with a power over Power over Ethernet is compatible.
• Such restrictions see, for example, provide that during operation of the display no more or only a few know ⁇ tere interfaces (eg USB ports) may be with electricity ver ⁇ ensures that the operation of drives or other storage devices (such as HDD) temporarily or permanently must be omitted or that in other ways only a throttled operation of the electronic device is possible.
• electronic devices are also operated with a proprietary mode of operation which does not comply with the PoE standards and which is higher than actually permitted.
• the power requirements of an electronic device that includes a display have traditionally been difficult to reconcile with Power over Ethernet.
• the power supply via Power over Ethernet is further complicated by the fact that the other units present or connected to the electronic terminal have a time-dependent and often unpredictable, sometimes greatly fluctuating power consumption.
• Hard disk drives experience high starting currents, albeit only for a short time.
• the variable number of units that can be connected to other interfaces (such as USB ports) of the electronic device, as well as their power consumption the total power consumption is difficult to predict.
• the invention provides for this purpose an electronic device according to claim 1 ready.
• the instrument measures its own energy consumption ⁇ or power requirement continuously and prevents potential overshoot of the Power over Ethernet fixed upper limit of power consumption by the DA that the device limits the display brightness.
• Limiting takes place via a control signal which sets an upper limit value for the permissible maximum display brightness determined ⁇ .
• the display brightness does not need to be noticeably impaired , since power consumption peaks (for example with hard disk start-up currents) only rarely or only briefly occur.
• FIG. 1 shows a schematic embodiment of an electronic device for connection to an Ethernet
• Figure 2 is a development of Figure 1 and
• Figure 3 Raets two exemplary time profiles of Leis ⁇ con- sumption of the display of the electronic overall.
• FIG. 1 shows a schematic embodiment of a elekt ⁇ tronic device 10, by means of its both for data exchange as well as the power supply suitable interface 1 to an Ethernet network 20 (for example, to a switch, hub or midspan of the network 20) subsequent ⁇ bar is.
• the device 10 is compatible with Power over Ethernet, for example with one of the two standards PoE or PoE +.
• the interface 1 enables a LAN connection to a network such as Ethernet. From the interface 1 (for example, an RJ45 plug) starting ⁇ runs within the electronic device 10, a line 2, which is formed for example of eight Einzelleitun ⁇ gene or four pairs of lines and is used for data or signal transmission as well as the DC power supply.
• the electronic device 10 may, for example, a thin
• the electrostatic ⁇ African device 10 includes a display 50 (or a monitor), the brightness (or its backlight) controllable as a function of a control signal S, in particular when is always necessary to be limited.
• the control signal S is transmitted through a control line 16 to the display 50.
• the actual image data and / or the power supply for the display 50 are for example supply line 13 provided; this can be diverted from the Lei ⁇ route 2.
• other power consumers 31 may be included; Additional power consumers 32, 33 (such as a mouse or a keyboard) can be connected to the outside of the electronic device 10.
• a measuring unit 3 In the immediate vicinity of the interface 1, a measuring unit 3 is arranged and / or connected, which measures the power flowing over the line 2, continuously, ie continuously or periodically at short intervals one after the other. Instead of the power P, the current intensity I (which is likewise significant at approximately constant voltage) can also be measured, for example with the aid of one or more resistors 6.
• the electronic device 10 furthermore has a computing unit 5 which is composed of the measured power consumption P and an upper power limit value G of the just permissible maximum power consumption Pmax (or corresponding from these values of the power consumption currents), the control signal S is calculated, which defines the maximum allowable display brightness H (S) and thus limits the Hellig ⁇ ness of the display.
• the time-dependent control signal S takes into account the instantaneous, simultaneous power consumption of the display 50 and all other cultivverbrau ⁇ cher 31, 32, 33 and limits the image brightness of the display 50 at least as far as that defined by the network specification upper limit for the maximum allowable Lei ⁇ tion consumption the interface 1 is not exceeded.
• the display 50 can be operated durably and reliably in accordance with the specifications of the network (for example, PoE, PoE +) without additional tensioning ⁇ voltage sources would be required.
• the danger is averted that the permissible total power consumption suddenly is exceeded and the network then causes a shutdown of the electronic device 10.
• the arithmetic unit 5 is connected, for example, by a first line branch 11 to the line section 2. Along the line 2, the first line branch 11 (as well as all other branching of the line section 2 Lei ⁇ lines) preferably downstream of the measuring unit 3.
• the calculation of the control signal S in the arithmetic unit 5 can take place with the aid of a difference signal D transmitted by a comparator 4 or comparator.
• the Differenzsig ⁇ nal D is, for example, the difference between an upper limit value G, for example, the maximum value Pmax of the just permissible power consumption, and a signal outputted by the measurement unit 3 Measured value M.
• the upper limit value G may be either stored in the electronic device 10, or by this can be determined by polling from the network 20.
• the display 50 is connected, for example by supply ⁇ lines 13 with the conduit section 2 and is so supplied with current and / or with image signals or image data. Between the display 50 and the arithmetic unit 5, a (unidirectional or bidirectional) control line 14 can run, which enables monitoring of the actual display brightness H by the arithmetic unit 5.
• Other (second) line branches 12 are used in FIG. 1 for operating additional, internal or external power consumers 31, 32, 33.
• FIG. 2 shows (also purely schematically) a further embodiment in which the electronic device 10 additionally comprises a specially designed control unit 7 for the display 50, by means of which the display brightness can be influenced.
• the construction according to Figure 2 largely corresponds to that of Fi gur ⁇ 1; to which reference is made.
• the control unit 7 is shown as part of the display 50, but may also be an independent, separate circuit block or part of the arithmetic unit 5.
• FIG. 2 also shows DC / DC voltage converters 15 (and a separate DC / DC voltage converter 15 'in the line section 2), which have been omitted in FIG. 1 for the sake of clarity.
• the calculated control signal S is transmitted to the control unit 7 for the display 50 and specifies an upper limit for the maximum permissible display brightness H.
• the Steuersig ⁇ signal S controls the brightness of the backlight and thus the display brightness (H).
• the control unit 7 comprises a damping scarf ⁇ device 8, the rapid and / or strong fluctuations in the display brightness H attenuates, in particular delayed in time or be ⁇ reduces tragically.
• the control unit 7 may comprise a hysteresis circuit, the fluctuations of the control signal S only above a lower one
• Threshold of such fluctuations in a changed display ⁇ brightness H implements. This is to avoid flickering the display (or a noticeable, rapid change in the brightness of the display), such as when starting currents from hard drives or connecting other high-performance components would lead to a sudden (temporary or permanent) blackout. Even if such brightness variations only occur when the actual brightness has already reached the position predetermined by the control signal S upper limit of the maximum Displayhellig ⁇ ness H, is the electronic device 10 (a ⁇ finally its displays 50) only by establishing and monitoring the maximum brightness H with Power-over-Ethernet compatible so far that the risk of disconnection in the event of an unexpected increase in power consumption no longer exists. A participation of software (BIOS, OS etc.) is not required by the way. Optionally, however, to generate a warning message to the user of the electronic device, a signal or other notification may be communicated to the software.
• Figure 3 shows purely schematically two exemplary time curves of the power consumption of the display 50 of the electro ⁇ African apparatus 10 of Figure 1 or 2.
• the upper limit value G or the just permissible maximum Leis ⁇ tung consumption Pmax (for example, 25 W) of the electronic device 10 (and the thus supplied bathverbrau- rather) specified which is fixed by the network and thus temporally constant.
• the Swissnutz according PV of the remaining (internal and external) 32 power consumers 31, 33 together lies in the time interval tl in about Hälf ⁇ te the maximum permissible total power, but increases at the beginning of the time interval t2 suddenly to about 75% (based on G or Pmax) and drops only at the beginning of the time interval t3 to a non-critical value of about 20%.
• the limit value of the maximum display power PDmax ie the maximum power that can be consumed by the display 50 at the respective time, develops so that the sum of the consumer utility power PV and the maximum display utility power PDmax never exceeds the maximum power consumption Pmax. Therefore, in FIG. 3, the profile of PDmax is mirrored to the profile of the consumer power PV (based on the value of 50% of the upper limit value G or Pmax).
• first Verlaufskur- fe I starts the actual Displaynutz according PD (t) in Figure 3 with an initial value of about 40% (the limit value G) and is initially located below the first nor ⁇ laubten maximum display power output Pdmax of about 50%.
• the control signal only allows an increase up to the current value of PDmax, which may not be exceeded. Only in the time interval t3, after the consumer power PV has fallen sharply and the maximum permissible display performance PDmax mirror image increases, the control signal S allows a further increase in the brightness and the actual power ⁇ PD (t) of the display.
• this increase does not take place already at the beginning of the time interval t3, but somewhat time-delayed (for example as a result of the control unit 7 or damping circuit 8 explained with reference to FIG. 2). Further, the rise is not forced ⁇ provisionally to PDmax, since this value is only an upper limit.
• the change in the power consumption of the display 50 which is shown in FIG. 3 on the basis of two exemplary time profiles, can be selected as a function of the display brightness H or the control signal S, for example.

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• Engineering & Computer Science (AREA)
• Theoretical Computer Science (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• General Engineering & Computer Science (AREA)
• Computer Hardware Design (AREA)
• Computer Networks & Wireless Communication (AREA)
• Signal Processing (AREA)
• Power Sources (AREA)

Applications Claiming Priority (2)

Publications (1)

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Citations (2)

• 2012
  • 2012-05-31 DE DE102012104711A patent/DE102012104711B3/de not_active Expired - Fee Related
• 2013
  • 2013-04-30 WO PCT/EP2013/059020 patent/WO2013178421A1/fr not_active Ceased

Patent Citations (2)

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