WO2022108272A1 - Appareil électronique et appareil d'affichage - Google Patents

Appareil électronique et appareil d'affichage Download PDF

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Publication number
WO2022108272A1
WO2022108272A1 PCT/KR2021/016643 KR2021016643W WO2022108272A1 WO 2022108272 A1 WO2022108272 A1 WO 2022108272A1 KR 2021016643 W KR2021016643 W KR 2021016643W WO 2022108272 A1 WO2022108272 A1 WO 2022108272A1
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WO
WIPO (PCT)
Prior art keywords
unit
voltage
output
electronic device
output voltage
Prior art date
Application number
PCT/KR2021/016643
Other languages
English (en)
Korean (ko)
Inventor
이재성
김문영
강정일
Original Assignee
삼성전자(주)
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Publication of WO2022108272A1 publication Critical patent/WO2022108272A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/63—Generation or supply of power specially adapted for television receivers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Definitions

  • the present invention relates to an electronic device and a display device, and more particularly, to an electronic device and a display device capable of compensating for a loss due to a voltage drop.
  • a display device such as a television (TV) allows an image to be displayed on a display based on content received from an external image source or stored therein.
  • TV television
  • a display device at home that is, a TV
  • a TV is often installed in such a way that AC power is supplied through an outlet installed on a wall.
  • the supplied AC power is converted into DC power required for each component including the display on the TV's power board, and for this purpose, a device for converting AC power to DC power, for example, an AC-DC converter, is provided on the power board.
  • a device for converting AC power to DC power for example, an AC-DC converter
  • the types and number of elements provided on the power board are gradually increasing according to the trend of higher quality and larger TVs. This may result in an increase in the size of the power board, and the increase in the size of the power board may act as a factor limiting the slimming of the TV.
  • a separate electronic device may be connected to the display device as an additional device for providing content.
  • the display device may be embodied in the form of receiving power from the electronic device through a connection cable.
  • the present invention provides an electronic device and a display device capable of compensating for a voltage drop occurring in a transmission line for power supply while maintaining a slim design of the display device by reducing the type and number of elements in the power board of the display device.
  • An electronic device includes a connection unit that can be connected to an external device provided with a display; and a power supply unit capable of supplying power to an external device connected to the connection unit, the power supply unit comprising: a converter configured to receive an input voltage and perform a switching operation based on the control signal to provide an output voltage to the connection unit; The output voltage is compensated for the voltage drop due to the fluctuation of the output current by detecting the fluctuation of the output current flowing to the external device through the output voltage and the connection part, and providing a control signal for changing the switching frequency based on the detection result to the converter It includes a control unit for controlling the supply to the external device.
  • the control unit may provide a control signal adjusted so that the output voltage is the operating voltage of the external device plus a voltage drop according to a change in the output current.
  • the conversion unit includes first and second output capacitors connected in parallel to an output terminal of the power supply unit, and the control unit is connected between the first and second output capacitors, and a sensing resistor capable of detecting a change in output current.
  • the control unit may include a sensing resistor and a reference resistor capable of detecting a change in the output voltage, and may include a sensing unit detecting a change in the output voltage and the output current using a feedback voltage input through the reference resistor and the sensing resistor. have.
  • the controller may further include a switching controller configured to output a control signal for controlling a switching operation of the converter based on variations in the output voltage and output current sensed by the detector.
  • the sensing resistor may include a PTC thermistor.
  • the reference resistor may include first and second reference resistors, and the second reference resistor may include an NTC thermistor.
  • the sensing unit may further include a third reference resistor connected in parallel to the second reference resistor and a switch connected in series to the third reference resistor.
  • a plurality of third reference resistors and switches are connected, and at least a portion of the plurality of switches may be electrically connected to a length of a cable connecting the electronic device and an external device.
  • the display device a main body provided with a functional unit including a display; and a power supply capable of supplying power to a functional unit of the main body, the power supply comprising: a connection unit that can be connected to the main body; a conversion unit receiving an input voltage and performing a switching operation based on a control signal to provide an output voltage to the connection unit; The output voltage is compensated for the voltage drop due to the fluctuation of the output current by detecting the fluctuation of the output current flowing to the main body through the output voltage and the connection part, and providing a control signal for changing the switching frequency based on the detection result to the converter It includes a control unit for controlling so as to be supplied to the main body.
  • the controller may provide the converter with a control signal adjusted so that the output voltage is a magnitude obtained by adding a voltage drop according to a change in the output current to the operating voltage of the functional part.
  • the functional unit includes a first functional unit to which an output voltage is input and a second functional unit, and the main body may further include a DC-DC converter for converting the output voltage to correspond to the operating voltage of the second functional unit.
  • the conversion unit includes first and second output capacitors connected in parallel to an output terminal of the power supply unit, and the control unit is connected between the first and second output capacitors, and a sensing resistor capable of detecting a change in output current.
  • the control unit may include a sensing resistor and a reference resistor capable of detecting a change in the output voltage, and may include a sensing unit detecting a change in the output voltage and the output current using a feedback voltage input through the reference resistor and the sensing resistor. have.
  • the controller may further include a switching controller configured to output a control signal for controlling a switching operation of the converter based on variations in the output voltage and output current sensed by the detector.
  • the sensing resistor may include a PTC thermistor.
  • the reference resistor may include first and second reference resistors, and the second reference resistor may include an NTC thermistor.
  • the sensing unit may further include a third reference resistor connected in parallel to the second reference resistor and a switch connected in series to the third reference resistor.
  • a plurality of third reference resistors and switches are connected, and at least a portion of the plurality of switches may be electrically connected to a length of a cable connecting the electronic device and an external device.
  • FIG. 1 shows a state in which a display device and an electronic device are installed according to an embodiment of the present invention.
  • FIG. 2 illustrates an example in which an electronic device is connected to a display device according to an embodiment of the present invention.
  • FIG 3 illustrates an example in which an adapter is connected to a display device according to an embodiment of the present invention.
  • FIG. 4 is a block diagram illustrating the configuration of a display device according to an embodiment of the present invention.
  • FIG. 5 is a block diagram illustrating a configuration of an electronic device connected to a display device.
  • FIG. 6 shows a related technology in which the power supply unit outputs a fixed voltage to an external device.
  • FIG. 7 illustrates a case in which the power supply unit outputs a variable voltage to an external device according to an embodiment of the present invention.
  • FIG. 8 shows an equivalent circuit of FIG. 7 .
  • FIG. 9 is a diagram for explaining a voltage change generated by a second load.
  • FIG. 10 is a diagram for explaining a feedback circuit for an output voltage of a power supply unit.
  • FIG. 11 illustrates a feedback circuit for an output current and an output voltage of a power supply unit in an electronic device according to an embodiment of the present invention.
  • Fig. 12 shows an equivalent circuit of the feedback circuit of Fig. 11;
  • 13, 14, 15, 16, and 17 each show implementation examples of a temperature feedback circuit of a power supply unit in an electronic device according to an embodiment of the present invention.
  • 20 is a graph illustrating a result of compensating for a line voltage drop in an electronic device according to an embodiment of the present invention.
  • 21 is a graph of a related art in which a line voltage drop is not compensated during operation of a second load of the display device.
  • FIG. 22 is a graph illustrating a case in which a line voltage drop is compensated during operation of a second load of the display device according to an exemplary embodiment of the present invention.
  • a 'module' or 'unit' performs at least one function or operation, and may be implemented as hardware or software or a combination of hardware and software, and is integrated into at least one module. and can be implemented.
  • at least one of the plurality of elements refers to all of the plurality of elements as well as each one or a combination thereof excluding the rest of the plurality of elements.
  • FIG. 1 shows a state in which a display device and an electronic device are installed according to an embodiment of the present invention.
  • the display apparatus 10 includes a screen for displaying an image, that is, a display 120 .
  • An electronic device 30 capable of outputting a signal corresponding to an image displayed on the display 120 may be connected to the display device 10 .
  • the display 120 may be included in a functional unit (also referred to as an operation performing unit or an operating unit) capable of performing an operation or function by receiving power.
  • a functional unit also referred to as an operation performing unit or an operating unit
  • the functional unit may include an electronic device as a configuration provided to perform a function of the display device 10 , that is, an operation.
  • the function unit includes, for example, the display 120 , a driving unit capable of driving the display 120 ( 130 in FIG. 4 ), a sound output unit capable of outputting sound ( 140 in FIG. 4 ), and the display device 10 ). and a processor (150 in FIG. 4 ) provided to control the operation or function, and the like, and the type of electronic device is not limited in the present invention. That is, various components provided as a load that consumes power in the display apparatus 10 may be included in the functional unit.
  • FIG. 2 illustrates an example in which an electronic device is connected to a display device according to an embodiment of the present invention.
  • the electronic device 30 outputs a signal for displaying an image of content received from an external image source or stored therein to the display device 10 .
  • the display device 10 and the electronic device 30 are interconnected/connected by a cable 20 .
  • the display device 10 receives data and control signals such as an image/audio signal (AV signal) from the electronic device 30 through the cable 20 .
  • AV signal image/audio signal
  • the display device 10 may receive power from the electronic device 30 through the cable 20 .
  • a power supply 400 capable of supplying power to a connected external device, that is, the display device 10 may be provided inside the electronic device 30 .
  • the power supply 400 receives commercial power, that is, AC (alternating current) power (alternating current power) through an outlet installed on a wall, such as home or office, and receives the input power (AC) to DC (direct current) is converted into power (direct current power) and provided to the display device 10 .
  • AC alternating current
  • DC direct current
  • the display device 10 and the electronic device 30 are provided with connecting portions 110 and 310 to which the cable 20 is connectable for interconnection, respectively, and a cable 20 from the electronic device 30 to the display device 10 is provided. Data and power can be supplied through
  • the display device 10 and the electronic device 30 are connected by a single cable 20 .
  • the cable 20 connecting the display device 10 and the electronic device 30 may be implemented as an optical cable in which an AV data transmission/reception cable and a power cable are integrated.
  • An optical cable transmits and receives information through an optical fiber composed of a core and a clad, and for this purpose, a signal converter for converting an electrical signal and an optical signal is provided in the connection units 110 and 310 of the transmitting side and the receiving side, respectively can be
  • the cable 20 connecting the display device 10 and the electronic device 30 is implemented as a so-called invisible cable (hereinafter, also referred to as an invisible cable or a magic cable), and the display device 10 ) and the electronic device 30 may be implemented so as not to spoil the aesthetics even in a state in which they are installed to be connected by the cable 20 .
  • connection method between the display device 10 and the electronic device 30 is not limited to the above embodiment, and a wired or wireless interface according to various standards is applicable.
  • the wired interface may be, for example, a cable according to a certain standard.
  • the wireless interface may be, for example, at least one of Wi-Fi, Wi-Fi Direct, and Bluetooth.
  • the electronic device 30 is an auxiliary device or an additional device that outputs a signal for causing the display device 10 to display images of various contents, and includes a media box. becomes
  • the electronic device 30 is a device connected to the display device 10 by a single cable 20 such as a transparent cable, so it is also called an OC box (One Connect Box). do.
  • the electronic device 30 receives content from a plurality of sources, that is, a signal supply source. As shown in FIG. 2 , the electronic device 30 may be provided with a plurality of connectors for connection with various devices including a source.
  • the electronic device 30 may transmit the content received from the source to the display device 10 through the cable 20 .
  • the type of the image source providing the content is not limited, and for example, an optical disc reproducing apparatus such as a set-top box (STB), Blu-ray, or digital versatile disc (DVD). , including a computer (PC) including a desktop or laptop, a mobile device including a smart pad such as a smart phone or a tablet, and the like. . Also, the electronic device 30 may receive content provided in the form of a file according to real-time streaming through a wired or wireless network.
  • an optical disc reproducing apparatus such as a set-top box (STB), Blu-ray, or digital versatile disc (DVD).
  • PC computer
  • the electronic device 30 may receive content provided in the form of a file according to real-time streaming through a wired or wireless network.
  • the display device 10 is implemented as a television (TV) that displays broadcast content.
  • TV television
  • the electronic device 30 may receive broadcast content based on at least one of a broadcast signal, broadcast information, and broadcast data received from a transmission device of a broadcast station.
  • the electronic device 30 may wirelessly receive a radio frequency (RF) signal, that is, a broadcast signal transmitted from a broadcasting station.
  • RF radio frequency
  • an antenna for receiving a broadcast signal and a tuner for tuning the broadcast signal for each channel may be provided. have.
  • the broadcast signal may be received through a terrestrial wave, cable, satellite, or the like, and the signal source is not limited to a broadcasting station.
  • the signal source is not limited to a broadcasting station.
  • any device or station capable of transmitting and receiving data may be included in the source of the present invention.
  • the standard of the signal received by the electronic device 30 may be configured in various ways corresponding to the implementation form of the device, for example, high definition multimedia interface (HDMI), composite video, and component video. , super video, SCART (Syndicat des Constructeurs d'Appareils Radiorecepteurs et Televiseurs), USB (universal serial bus), etc. may receive the video content by wire.
  • HDMI high definition multimedia interface
  • SCART Syndicat des Constructeurs d'Appareils Radiorecepteurs et Televiseurs
  • USB universal serial bus
  • the electronic device 30 may receive content from various external devices including a server through wired or wireless network communication, and the type of communication is not limited.
  • the electronic device 30 may perform at least one of wireless communication through an access point (AP) or wireless communication directly connected to another device without an AP.
  • the electronic device 30 may receive content from an image source through wireless network communication such as Wi-Fi, Wi-Fi Direct, or Bluetooth.
  • the electronic device 30 may receive content through wired network communication such as Ethernet.
  • the electronic device 30 may provide the content received in various ways as described above to the display device 10 so that an image of the corresponding content is displayed on the display device 10 .
  • the display device 10 may receive content directly from an external image source without going through the electronic device 30 . That is, in the present invention, the display apparatus 10 may be implemented to receive a broadcast signal/video signal by wire or wirelessly by at least one of the above-described various methods. Also, the display device 10 may directly receive AC power through an outlet installed on a wall, such as a home or office, without passing through the electronic device 30 .
  • the electronic device 30 When the display device 10 receives power through the electronic device 30 , the electronic device 30 receives AC power through a wall outlet.
  • the electronic device 30 may convert the received AC power into DC power of a predetermined level by the power supply unit 400 and supply it to the display device 10 through the cable 20 .
  • the power supply unit 400 may be provided in an adapter that can be connected to the display device 10 through the cable 20 .
  • FIG 3 illustrates an example in which an adapter is connected to a display device according to an embodiment of the present invention.
  • the display device 10 may be connected to the adapter 21 through the connector 110 to which the cable 20 is connectable.
  • the connection unit 110 may be provided in a main body including a functional unit such as the display 120 , and power may be supplied from the adapter 21 to the main body of the display apparatus 10 through the cable 20 .
  • the adapter 21 is provided with a power supply unit 400 capable of supplying power to a functional unit of the display device 10 .
  • the display device 10 may receive DC power output from the power supply unit 400 of the adapter 21 through the cable 20 .
  • the adapter 21 becomes a separate and independent power supply that can be connected to the main body of the display device 10 .
  • the display device 10 may be implemented only by the configuration of the main body except for the adapter 21 .
  • the display device 10 may receive commands according to various user inputs from a peripheral device such as a remote control directly or through the electronic device 30 .
  • the command may be received from the remote control through wireless communication, and the wireless communication may include infrared (IR) communication of a predetermined frequency band, Bluetooth, or the like.
  • IR infrared
  • the installation position of the signal receiving unit for receiving a command according to a user input by wireless communication is not limited, it may be provided in either or both of the display device 10 and the electronic device 30 . .
  • the display device 10 may operate as a smart TV or an Internet Protocol TV (IP TV).
  • Smart TV can receive and display broadcast signals in real time, and has a web browsing function, so it is possible to search and consume various contents through the Internet at the same time as displaying real-time broadcast signals. to be.
  • the smart TV since the smart TV includes an open software platform, it can provide interactive services to users. Accordingly, the smart TV may provide a user with various contents, for example, an application providing a predetermined service through an open software platform.
  • These applications are applications that can provide various types of services, and include, for example, applications that provide services such as SNS, finance, news, weather, maps, music, movies, games, and e-books.
  • the display device 10 is not limited to a television, and any device capable of performing an operation by receiving DC power through the power supply unit 400 provided in the electronic device 30 or the adapter 21 . , included in the display device of the present invention. That is, the display device 10 is, for example, a computer (PC) device including a laptop or desktop (or a monitor connected to the computer body) or various types of devices such as various home appliances. will be able
  • the present invention can also be implemented in a form in which the power supply unit 400 is included in the adapter 21 , and the configuration and operation of the power supply unit 400 to be described later also apply to the power supply unit 400 provided in the adapter 21 . The same could be applied.
  • FIG. 4 is a block diagram illustrating a configuration of a display device according to an embodiment of the present invention
  • FIG. 5 is a block diagram illustrating a configuration of an electronic device connected to the display device.
  • the configuration of the display device 10 and the electronic device 30 shown in FIGS. 4 and 5 is only an example, and the display device and the electronic device according to another embodiment are shown in FIGS. 4 and 5 , respectively. It may be implemented in a configuration other than the configuration.
  • the display device 10 of the present invention has a configuration other than the configuration shown in FIG. 4 (eg, a storage unit capable of storing content, or a user input unit capable of receiving a user input such as a remote control or an operation panel) etc.) may be added, or may be implemented in a form in which at least one of the configurations shown in FIG. 4 is excluded.
  • the electronic device 10 of the present invention has a configuration other than the configuration shown in FIG.
  • the display device 10 and the electronic device 30 of the present invention may be implemented in a form in which a part of the configuration illustrated in FIGS. 4 and 5 is changed.
  • the display apparatus 10 includes a first connector 110 as shown in FIG. 4 .
  • the first connector 110 may be coupled to the second connector 310 of the electronic device 30 , and when coupled, the display device 10 may receive power from the power supply unit 400 of the electronic device 30 .
  • the display device 10 may receive power from the power supply unit 400 of the electronic device 30 .
  • the first connector 110 may be implemented as a DC connector capable of receiving a DC voltage from the power supply 400 .
  • the first connection unit 110 may be implemented as a wired interface unit capable of transmitting and receiving control signals to and from the second connection unit 310 of the electronic device 30 as well as a power signal. That is, the first connector 110 may have the form of a connector, terminal, or port provided with a plurality of pins provided to correspond to a plurality of signal lines of the cable 20 .
  • a plurality of pins provided in the first connection unit 110 may be defined to transmit or receive signals each having predetermined characteristics. Signals transmitted or received through each pin include a power signal or a control signal.
  • the display device 10 may receive the DC voltage provided from the power supply unit 400 of the electronic device 30 through the first connection unit 110 .
  • the DC voltage thus received may be transmitted to the display 120 through the power board 13 .
  • the DC voltage output from the power supply unit 400 of the electronic device 30 may be supplied as the operating power of the display 120 .
  • the first connector 110 may be provided on an image board provided in the main body of the display device 10 as shown in FIG. 2 , but in the present invention, the position of the first connector 110 is not limited
  • the display device 10 may include a display 120 .
  • the implementation method of the display 120 is not limited, and for example, liquid crystal, plasma, light-emitting diode, organic light-emitting diode, surface conduction electron gun ( It can be implemented in various display methods such as surface-conduction electron-emitter), carbon nano-tube, and nano-crystal.
  • the display 120 may include a screen on which an image is displayed, that is, a panel constituting the screen, and a backlight unit including a plurality of light sources such as LEDs.
  • the display 120 may display an image of content received through the electronic device 30 , a user interface (UI) including a menu item for selecting a function of the display device 10 , and the like.
  • UI user interface
  • the display 120 is defined as a first load (first functional unit) operated by DC voltage output from the power supply unit 400 of the electronic device 30 .
  • the first load specifically refers to the backlight unit of the display 120 driven by the driving voltage Vdrv, and the output voltage Vout provided from the electronic device 30 is driven through a line voltage drop through the cable 20 . It may be supplied to the first load as the voltage Vdrv.
  • the first load is distinguished from a second load (second function unit) such as the sound output unit 140 or the main board 11 , and the level of the DC voltage output from the power supply unit 400 is adjusted in the second load. is supplied
  • the display device 10 may include a driving unit 130 .
  • the driving unit 130 may drive the display 120 based on the control signal.
  • the control signal is directly received from the electronic device 30 to the driving unit 130 through the cable 20 or provided from the processor 150 to be described later to the driving unit 130 to turn on/off the switching element provided in the driving unit 130 . Off can be controlled.
  • the driving unit 130 may directly receive a driving voltage from the electronic device 30 through the cable 20 .
  • Vout which is an output voltage of the electronic device 30 , becomes a driving voltage Vdr through a line voltage drop generated in the cable 20 , and may be directly provided to the driving unit 130 .
  • the display device 10 may include a sound output unit 140 .
  • the sound output unit 140 may output sound, that is, sound.
  • the sound output unit 140 includes an amplifier for amplifying a sound signal and a speaker for outputting a sound corresponding to the amplified sound signal.
  • the display device 10 may include a processor 150 .
  • the processor 150 may be installed on the main board 11 provided in the main body of the display device 10 .
  • the processor 150 controls all components of the display device 10 to operate.
  • the processor 150 includes a control program (or instructions) for performing such a control operation, a non-volatile memory in which the control program is installed, a volatile memory in which at least a part of the installed control program is loaded, and the loaded control program. It may include at least one general-purpose processor that executes, for example, a microprocessor, an application processor, or a central processing unit (CPU).
  • the processor 150 may include a single core, a dual core, a triple core, a quad core, and multiple cores thereof.
  • the processor 150 includes a plurality of processors, for example, a main processor and a sub processor operating in a standby mode (eg, only standby power is supplied and does not operate as a display device). ) may be included.
  • the processor, ROM, and RAM may be interconnected through an internal bus.
  • the processor 150 may include an image processing unit that performs various preset processes on a content signal received from a source.
  • the processor 150 may display an image corresponding to the image signal on the display 120 by outputting an output signal generated or combined by performing image processing to the display 120 .
  • the image processing unit may include a decoder that decodes the image signal to correspond to the image format of the display apparatus 10 and a scaler that adjusts the image signal to match the output standard of the display 110 .
  • the decoder is, for example, but not limited to, an H.264 decoder. That is, the video decoder according to the embodiment of the present invention can be implemented as a decoder according to various compression standards, such as a Moving Picture Experts Group (MPEG) decoder or a High Efficiency Video Codec (HEVC) decoder.
  • MPEG Moving Picture Experts Group
  • HEVC High Efficiency Video Codec
  • the type of content processed by the image processing unit is not limited.
  • the content that can be processed by the image processing unit may further include not only a moving picture such as a video, but also a picture such as a JPEG file, a still image such as a background screen, and a menu item of the UI.
  • the type of image processing process performed by the image processing unit of the present invention is not limited, for example, de-interlacing for converting an interlace broadcasting signal into a progressive method, and image quality improvement. At least one of various processes such as noise reduction, detail enhancement, frame refresh rate conversion, and line scanning may be performed.
  • the image processing unit may be included in the main board 11 in which circuit configurations such as various chipsets, memories, electronic components, and wiring for performing each of these processes are mounted on a printed circuit board (PCB).
  • the display device 10 may include a processor 150 including a tuner and an image processing unit on a single board.
  • each component of the display device 10 may be disposed on a plurality of printed circuit boards communicatively connected to each other.
  • the display device 10 may be implemented in such a way that the processor 150 including the image processing unit is provided on an image board separate from the driving board including the driving unit 130 . .
  • the processor 150 may process the corresponding signal so that an image of a predetermined channel is displayed based on the broadcast signal. Also, the processor 150 may process the signal so that an image of a predetermined content is displayed based on the signal received from the server.
  • the processor 150 may be implemented as a form included in the main board 11 built in the display device 10 of the electronic device, that is, a main SoC (Main SoC) mounted on a PCB.
  • main SoC Main SoC
  • the control program may include program(s) implemented in the form of at least one of a BIOS, a device driver, an operating system, firmware, a platform, and an application.
  • the application is pre-installed or stored in the display device 10 when the display device 10 is manufactured, or receives data of the application from the outside when used later, and based on the received data, the display device (10) can be installed.
  • Data of the application may be downloaded to the display device 10 from an external server such as an application market, for example.
  • an external server is an example of the computer program product of the present invention, but is not limited thereto.
  • the control program may be recorded in a storage medium readable by a device such as a computer.
  • the device-readable storage medium may be provided in the form of a non-transitory storage medium or a non-volatile storage medium.
  • 'non-transitory storage medium' is a tangible device and only means that it does not contain a signal (eg, electromagnetic wave). It does not distinguish the case where it is stored as
  • the 'non-transitory storage medium' may include a buffer in which data is temporarily stored.
  • the display device 10 may include a DC-DC converter 160 .
  • the DC-DC converter 160 may be provided on the power board 13 .
  • the DC-DC converter 160 adjusts the level of the DC voltage received from the power supply unit 400 of the electronic device 30 through the first connection unit 110 to adjust the level of the DC voltage received from the power supply unit 400 of the electronic device 30 to a second load, for example, a sound output unit. (140) or can be output to the main board (11).
  • a second load for example, a sound output unit. (140) or can be output to the main board (11).
  • the electronic device 30 includes a second connection part 310 as shown in FIG. 5 .
  • the second connector 310 may be coupled to the first connector 110 of the display device 10 , and when coupled, the power provided from the power supply unit 400 of the electronic device 30 is output to the display device 10 . prepared to do so.
  • the second connector 310 may be implemented as a DC connector capable of outputting a DC voltage to the display device 10 .
  • the second connection unit 310 may be implemented as a wired interface unit capable of transmitting and receiving control signals to and from the first connection unit 110 of the display apparatus 10 as well as a power signal. That is, the second connection unit 310 may have the form of a connector, terminal, or port provided with a plurality of pins provided to correspond to a plurality of signal lines of the cable 20 .
  • a plurality of pins provided in the second connection unit 310 may be defined to transmit or receive signals each having predetermined characteristics. Signals transmitted or received through each pin include a power signal or a control signal.
  • the electronic device 30 may output the DC voltage provided from the power supply unit 400 of the electronic device 30 to the display device 10 through the second connection unit 310 .
  • the electronic device 30 includes a power supply unit 400 .
  • the power supply unit 400 may be implemented as, for example, a switching mode power supply (SMPS), and may convert AC power input from the outside into DC power of a predetermined level.
  • the DC power converted in this way is output through the second connection unit 320 , and may be supplied to the first load of the display device 10 , that is, the display 120 as operating power.
  • SMPS switching mode power supply
  • the power supply unit 400 may include a conversion unit 401 and a control unit 403 as shown in FIG. 5 .
  • the converter 401 receives an input voltage input from the outside, performs a switching operation based on the control signal, and provides an output voltage to the second connector 310 .
  • the conversion unit 401 may include a rectifying unit 410 , a switching unit 420 , a transformer 430 , and an output unit 440 as shown in FIG. 5 .
  • the control unit 403 detects variations in the output voltage of the output unit 440 and the output current flowing through the second connection unit 310 , and provides a control signal based on the sensing result to the switching unit 420 .
  • the control unit 403 may include a sensing unit 450 and a switching control unit 460 as shown in FIG. 5 .
  • the power supply unit 400 has a circuit configuration such as various chipsets, memories, electronic components, and wiring corresponding to each of the above components (410, 420, 430, 440, 450, 460) is a printed circuit board (PCB). ) can be implemented as a power board mounted on the PCB.
  • PCB printed circuit board
  • the rectifier 410 may receive, for example, an AC voltage (AC voltage) input through content installed on a wall or the like, rectify the received AC voltage, and output the received AC voltage.
  • AC voltage AC voltage
  • the rectifier 410 may include an EMI filter (electromagnetic interference filter) that removes noise of the input AC voltage, and a bridge diode circuit configured of a plurality of diodes to rectify the input AC voltage.
  • EMI filter electromagnetic interference filter
  • the bridge diode circuit may be implemented as a full-wave diode bridge circuit for full-wave rectification of an AC voltage including, for example, four diodes connected by a bridge, but is not limited thereto.
  • the switching unit 420 may perform switching according to an operating frequency (switching frequency).
  • the switching unit 420 includes a switching element capable of switching the current flowing through the transformer 430 .
  • a plurality of switching elements may be provided in the switching unit 430 .
  • the switching unit 430 may be implemented in a form including, for example, two or four switching elements, but is not limited thereto.
  • Each switching element of the switching unit 420 may perform a switching operation based on a control signal output from the control unit 403, and power is transferred from the primary side to the secondary side of the transformer 430 by the switching operation. .
  • An LC or LLC resonant converter may be applied to the transformer 430 , but the implementation form of the transformer 430 in the electronic device 30 of the present invention is not limited.
  • the output unit 440 rectifies the power transmitted to the secondary side of the transformer 430 and converts it into a DC voltage (DC voltage) of a predetermined level.
  • the DC voltage converted by the output unit 440 may be output to the display device 10 through the connection unit 310 .
  • the output unit 440 includes an output capacitor capable of outputting the power transmitted from the transformer 430 as a DC voltage, and the implementation form of the output unit 440 is not limited.
  • the sensing unit 450 detects an output voltage (DC voltage) output through the output unit 440 and an output current flowing to an external device, that is, the display device 10 through the second connection unit 310 .
  • the sensing unit 450 detects a change in the output current flowing through the second connection unit 310 as well as the output voltage (DC voltage) of the power supply unit 400 . implemented so that
  • a change in output current may occur while the output voltage of the power supply unit 400 is supplied to each load of the display device 10 , and by feeding it back by the sensing unit 450 , the switching control unit 460 outputs the output voltage.
  • the control signal to be changed is changed.
  • the switching controller 460 may be implemented as an integrated circuit (IC) in the form of a chip, but is not limited thereto.
  • IC integrated circuit
  • the switching control unit 460 provides a control signal adjusted based on the detection result of the sensing unit 450 to the switching unit 220 so that the voltage drop according to the fluctuation of the output current flowing through the second connection unit 310 is reduced.
  • the compensated output voltage (DC voltage) is controlled to be supplied to an external device through the output unit 440 .
  • the power supply unit 400 outputs a variable voltage to an external device, that is, the display device 10 , which is distinguished from the related art for outputting a fixed voltage.
  • FIG. 6 shows a related technology in which a power supply unit outputs a fixed voltage to an external device
  • FIG. 7 shows a case in which the power supply unit outputs a variable voltage to an external device according to an embodiment of the present invention
  • FIG. 8 is FIG. shows the equivalent circuit of
  • the electronic device 30a is an external device, for example, a display device 10a including a display 520 and a driving unit 530 with a fixed size, for example. , output a DC voltage of 350V.
  • a first DC-DC converter 550 for converting the fixed DC voltage received from the electronic device 30a to correspond to the first load, that is, the operating voltage of the display 520 .
  • a second DC-DC converter 560 for converting the fixed DC voltage to correspond to the operating voltage of the second load, for example, the main board or the speaker is provided.
  • a plurality of DC-DC converters 550 and 560 for converting the fixed DC voltage output from the electronic device 30a into a level corresponding to the operating voltage of each load of the display device 30a must be provided. Therefore, there is a limit in designing the slim display device 10a.
  • the first load that is, the driving voltage of the display 120
  • the power supply unit 400 of the electronic device 30 is directly transmitted from the power supply unit 400 of the electronic device 30 . It is implemented to be supplied as
  • the display device 10 is provided with only the DC-DC converter 160 for providing the DC voltage output to the second load, for example, the sound output unit 140 or the main board 11, Slimming of the display device 10 may be easier.
  • the electronic device 30 outputs a DC voltage Vout corresponding to the operating voltage of the first load, that is, the display 120 , to the display device 10 , rather than a fixed DC voltage.
  • the output Vout may be supplied as an operating voltage Vdrv to the display 120 through a line voltage drop generated by the cable 20 .
  • Vdrv is linked to the luminance of the display 120
  • the output voltage Vout of the electronic device 30 becomes a variable voltage.
  • the DC voltage Vout output from the power supply unit 400 of the electronic device 30 is also supplied to the second load through the DC-DC converter 160 . That is, the output current Iout is the sum of the current I driv flowing through the first load and the current I DC- DC flowing through the second load.
  • the sound output unit 140 including an amplifier and a speaker pulls Vout in the form of a peak load having periodicity, not a load having a constant value, and displays the display in the process.
  • Vdrv supplied to 120 may occur.
  • the electronic device 30 detects a change in Vdrv generated by the second load through feedback on the output current Iout, and adjusts the output voltage Vout by compensating for the voltage drop. This specific compensation operation will be described in detail with reference to FIG. 11 and the like.
  • FIG. 9 is a diagram for explaining a voltage change generated by a second load.
  • Vdrv As shown in FIG. 9 , as the voltage Vout is pulled from the second load, for example, the sound output unit 140, a line drop a may periodically occur in Vdrv. Accordingly, in Vdrv provided as the first load, a voltage drop occurs in sections t1-t2, t3-t4, and t5-t6 in which Vout is provided as the second load.
  • this ripple of the Vdrv voltage may directly affect the display 120 .
  • flickering such as flicker may occur on the screen of the display 120 , which may cause visual inconvenience to a viewer watching the screen.
  • the power supply unit 400 controls the display device 10 through feedback using the output voltage Vout and the output current Iout flowing through the second connection unit 310 .
  • the compensated output voltage Vout is provided to the display device 10 in consideration of not only the load variation but also the line voltage drop caused by the transmission cable 20 .
  • FIG. 10 is a diagram for explaining a feedback circuit for an output voltage of a power supply unit.
  • 11 shows a feedback circuit for an output current and an output voltage of a power supply unit in an electronic device according to an embodiment of the present invention
  • FIG. 12 shows an equivalent circuit of the feedback circuit of FIG. 11 .
  • 10 and 11 are examples of circuit diagrams for each configuration of the power supply unit 400 of FIG. 5, and the implementation forms of the output unit and the sensing unit are different from each other. Accordingly, configurations of the same names and reference numerals except for the output unit and the sensing unit perform the same operation as described with reference to FIG. 5 , and thus a redundant description may be omitted.
  • the sensing unit 451 is a reference resistor Rref for feeding back the output voltage Vout applied to the output capacitor Cout of the output unit 441 and a feedback voltage Vref applied to the reference resistor Rref. and a shunt regulator SR that conducts according to the current state, and a photocoupler PC that operates as the shunt regulator SR conducts.
  • the photocoupler PC is composed of a photodiode and a phototransistor.
  • the output voltage Vout is a DC voltage supplied from the electronic device 30 to the display device 10, and the output voltage Vout becomes the driving voltage Vdrv through a line voltage drop generated in the cable 20 connecting the two devices. It may be supplied to the first load, that is, the display 120 .
  • the sensing unit 251 may sense a change in the output voltage Vout through the feedback voltage Vref applied to the reference resistor Rref.
  • the shunt regulator SR operates, that is, conducts, and the photo connected to the cathode of the shunt regulator SR Coupler PC works.
  • the feedback voltage VFB according to the current flowing through the phototransistor of the photocoupler PC may be received through the feedback terminal FB of the switching controller 460 .
  • the feedback voltage VFB may decrease, and as the current flowing through the phototransistor decreases, the feedback voltage VFB may increase.
  • the switching controller 460 may control the output voltage Vout to decrease by changing, ie, adjusting, the switching frequency of the switching unit 420 according to the feedback voltage VFB of the phototransistor.
  • the switching controller 460 may control the switching unit 420 to decrease the output voltage Vout.
  • the power supply unit 400 keeps the output voltage Vout constant by this control operation.
  • Equation 1 the relationship between Vout and Vref is as in Equation 1 below.
  • the output unit 442 includes first and second output capacitors C1 and C2 connected in parallel to the output terminal of the power supply unit 400 .
  • the sensing unit 452 is configured according to the feedback voltage Vref applied to the sensing resistor Rs for feeding back the output current Iout of the output unit 442, the reference resistors R1 and R2 for feeding back the output voltage Vout, and the reference resistors R1 and R2. and a shunt regulator SR that is turned on, and a photocoupler PC that is operated as the shunt regulator SR turns on.
  • R1 and R2 may be referred to as a first reference resistor and a second reference resistor, respectively.
  • the sensing resistor Rs is connected between the first output capacitor C1 and the second output capacitor C2 of the output unit 442 , and the sensing unit 251 may detect a change in Iout through the sensing resistor Rs.
  • Reference resistors R1 and R2 are connected to the reference node of the shunt regulator SR.
  • the sensing unit 251 may sense a change in the output voltage Vout through the reference resistors R1 and R2.
  • Vref2 is a feedback voltage for the output current Iout, and is varied by Iout.
  • Vref2 the variable voltage value Vref2 is calculated as in Equation 2 below.
  • Vout 0V.
  • the sensing unit 452 is implemented to feed back a feedback voltage Vref obtained by adding a feedback voltage Vref2 for Iout according to Equation 2 above to a feedback voltage Vref1 for Vout.
  • Vref1 corresponds to the feedback voltage Vref of FIG. 10 .
  • the feedback voltage Vref is calculated as in Equation 3 below. Here, it is assumed that R1, R2 >> Rs.
  • the value of R1//R2 is set to a value similar to that of the reference resistor Rref of FIG. 10 , so that the feedback to Vout, that is, the compensation characteristic of Vref1, is maintained at the same level as the feedback circuit of FIG. 10 .
  • the reference resistor R2 may be set to have a very small resistance value.
  • the sensing unit 452 may feed back the variation of the output voltage Vout and the variation of the output current Iout by sensing the feedback voltage Vref input through the sensing resistor Rs and the reference resistors R1 and R2 .
  • the variation of the output current Iout may be generated by the operation of the second load of the external device to which the output voltage Vout is supplied through the cable 20 , that is, the display device 10 . That is, the sensing unit 452 may feed back a line voltage drop generated by the connection cable 20 itself and a voltage drop generated by a load change caused by the operation of the second load.
  • the output current Iout may increase.
  • the feedback voltage Vref value decreases according to Equation (3).
  • the switching control unit 460 increases the output voltage Vout based on the signal (feedback voltage) received through the feedback terminal FB to compensate for the line voltage drop. works in the form.
  • the sensing unit 452 detects a change in the output voltage Vout and the output current Iout flowing through the second connection unit 310 , and the switching control unit 460 detects it Based on the result, an adjusted control signal to change, for example, increase or decrease, the switching frequency is output to the switching unit 420 , and a switching operation is controlled to be performed according to the adjusted control signal.
  • the switching control unit 460 transmits a control signal to the switching unit ( 420) to perform a compensation operation.
  • the power supply unit 400 of the electronic device 30 may be implemented to further feed back a voltage drop due to a temperature rise.
  • 13, 14, 15, 16, and 17 each show implementation examples of a temperature feedback circuit of a power supply unit in an electronic device according to an embodiment of the present invention.
  • the line voltage drop described in FIG. 9 is proportional to the resistance value of the transmission line, that is, the cable 20, and the resistance value of the transmission line may be proportional to its length and temperature. Therefore, depending on the length of the cable 20, an additional voltage drop and heat generation may occur at the output voltage Vout, and the elevated temperature of the cable 20 may cause another voltage drop.
  • the sensing resistor Rs may be implemented as a PTC thermistor.
  • Equation 4 The relationship between resistance and temperature change (assuming that it is linear) is expressed in Equation 4 below.
  • ⁇ R is the resistance change amount
  • ⁇ T is the temperature change amount
  • k is the primary resistance temperature coefficient, respectively.
  • the k value is close to 0, so it may not be greatly affected by temperature, but a thermistor has a large resistance value change according to temperature, so it can be used for temperature sensing.
  • the temperature feedback circuit of FIG. 13 utilizes a PTC thermistor having a positive k value.
  • the sensing unit 454 may further include a bias resistor connected in series to the PTC thermistor in the temperature feedback circuit of FIG. 13 . That is, the sensing resistor Rs is implemented in the form of connecting the bias resistor and the PTC thermistor in series.
  • the sensing unit 454 implemented in such a way that it further includes a bias resistor operates in the same manner as the sensing unit 453 of FIG. 13 to compensate for a voltage drop due to an increase in temperature, and the bias resistor enables output sensing It has the advantage of further improving the accuracy of
  • the second reference resistor R2 of the feedback circuit of FIG. 11 may be implemented as an NTC thermistor having a negative value of k.
  • the NTC thermistor has a characteristic that the resistance value decreases as the temperature increases.
  • the sensing unit 456 may further include a bias resistor connected in series to the NTC thermistor in the temperature feedback circuit of FIG. 15 . That is, the second reference resistor R2 is implemented in the form of connecting the bias resistor and the NTC thermistor in series.
  • the sensing unit 456 implemented in such a way that it further includes a bias resistor operates in the same manner as the sensing unit 455 of FIG. 15 to compensate for a voltage drop due to an increase in temperature, and the bias resistor enables output sensing. It has the advantage of further improving the accuracy of
  • the reference resistor R2 implemented as an NTC thermistor in the temperature feedback circuit of FIG. 15 is a heating element of the output unit 442 , for example, output diodes D1, D2, D3, D4. It may be implemented in a form attached to a heat sink configured by The sensing unit 457 implemented in a form including the NTC thermistor attached to the heat sink in this way operates in the same manner as the sensing unit 455 of FIG. 15 to compensate for a voltage drop due to an increase in temperature, and the transmission line In addition to the temperature change in , there is an advantage in that it is possible to feed back a temperature increase of the power supply unit 400 itself due to the power transfer operation.
  • the power supply unit 400 of the electronic device 30 may be implemented to further feed back a voltage drop caused by an increase in the length of the cable 20 , that is, a transmission line.
  • the line voltage drop described in FIG. 9 is proportional to the resistance value of the transmission line, that is, the cable 20, and the resistance value of the transmission line may be proportional to its length and temperature. Accordingly, when the length of the cable 20 is increased, line resistance increases in proportion to it, which may cause a further increase in line voltage drop.
  • the sensing unit 458 may further include a third reference resistor R3 connected in parallel to the second reference resistor R2 and a switch S1 connected in series to the third reference resistor R3.
  • information on the length of the cable 20 may be obtained in various ways, such as a user input or received from a main board.
  • the sensing unit 459 may be implemented to further include a resistor R4 - Rn and a switch S2 - Sn-3 connected in parallel to the reference resistor R3 in the transmission line feedback circuit of FIG. 18 .
  • the output voltage Vout is compensated for the line voltage drop caused by various causes in the process of supplying power (DC power) to the display device 10, thereby providing a stable power supply. make supply possible.
  • 20 is a graph illustrating a result of compensating for a line voltage drop in an electronic device according to an embodiment of the present invention.
  • 21 is a graph of a related art in which a line voltage drop is not compensated during operation of a second load of the display device
  • FIG. 22 is a case in which a line voltage drop is compensated during operation of a second load of the display device according to an embodiment of the present invention is a graph of
  • a line drop a may periodically occur in Vdrv.
  • the sensing units 452, 453, 454, 455, 456, 457, 458, 459 feed back the output current Iout through the feedback voltage Vref.
  • the controller 403 may control the converter 401 to increase the output voltage Vout, as shown in FIG. 20 .
  • the driving voltage Vdrv supplied to the display 120 of the display device 10 also increases, so that, for example, a problem such as flicker does not occur on the screen of the display 120 .
  • the degree of voltage drop by the second load may further increase according to the operation of the second load, for example, the sound output unit 140 including the speaker and the amplifier.
  • the power supply unit 400 of the electronic device 30 feeds back the output current Iout and compensates it for the output voltage Vout, thereby appropriately compensating for the magnitude of the line voltage drop. This becomes possible.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

La présente invention concerne un appareil électronique et un appareil d'affichage. L'appareil électronique comprend : une unité de connexion qui peut être connectée à un appareil externe pourvu d'un écran ; et une unité d'alimentation électrique qui peut fournir de l'énergie électrique à l'appareil externe connecté à l'unité de connexion. L'unité d'alimentation électrique inclut : une partie de conversion qui reçoit une tension d'entrée, réalise une opération de commutation sur la base d'un signal de commande et fournit une tension de sortie à l'unité de connexion ; et une partie de commande qui détecte des changements de la tension de sortie et d'un courant de sortie s'écoulant vers l'appareil externe à travers l'unité de connexion, et fournit à la partie de conversion un signal de commande pour changer la fréquence de commutation sur la base des résultats détectés, ce qui permet de commander la partie de conversion de sorte que l'appareil externe peut être alimenté avec la tension de sortie compensée contre la chute de tension due au changement du courant de sortie.
PCT/KR2021/016643 2020-11-18 2021-11-15 Appareil électronique et appareil d'affichage WO2022108272A1 (fr)

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KR101566200B1 (ko) * 2009-12-09 2015-11-05 삼성전자 주식회사 디스플레이장치 및 그 구동방법
KR102052329B1 (ko) * 2013-06-28 2019-12-05 엘지디스플레이 주식회사 전원 공급 장치 및 이를 포함하는 디스플레이 장치
KR102153692B1 (ko) * 2019-02-26 2020-09-09 엘아이지넥스원 주식회사 전자 장비에서의 직류 전원 공급 장치 및 방법

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KR20110036396A (ko) * 2009-10-01 2011-04-07 삼성전자주식회사 디스플레이장치 및 텔레비전과, 디스플레이장치의 전원출력 제어방법
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US20150222183A1 (en) * 2013-04-11 2015-08-06 Telefonaktiebolget L M Ericsson (Publ) Voltage droop control in a voltage-regulated switched mode power supply
KR102052329B1 (ko) * 2013-06-28 2019-12-05 엘지디스플레이 주식회사 전원 공급 장치 및 이를 포함하는 디스플레이 장치
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