WO2016153249A1 - Hdmi를 사용하여 전력을 송수신하기 위한 방법 및 그 장치 - Google Patents
Hdmi를 사용하여 전력을 송수신하기 위한 방법 및 그 장치 Download PDFInfo
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- WO2016153249A1 WO2016153249A1 PCT/KR2016/002848 KR2016002848W WO2016153249A1 WO 2016153249 A1 WO2016153249 A1 WO 2016153249A1 KR 2016002848 W KR2016002848 W KR 2016002848W WO 2016153249 A1 WO2016153249 A1 WO 2016153249A1
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- power
- sink device
- source device
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- hdmi
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- 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
-
- 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
- G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
- G09G5/006—Details of the interface to the display terminal
-
- 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
- G06F1/266—Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/28—Supervision thereof, e.g. detecting power-supply failure by out of limits supervision
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
- H04N21/4363—Adapting the video or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network
- H04N21/43632—Adapting the video or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network involving a wired protocol, e.g. IEEE 1394
- H04N21/43635—HDMI
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
- H04N21/44231—Monitoring of peripheral device or external card, e.g. to detect processing problems in a handheld device or the failure of an external recording device
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/443—OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB
- H04N21/4436—Power management, e.g. shutting down unused components of the receiver
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
- H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
- H04N21/4627—Rights management associated to the content
-
- 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
-
- 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
- G09G2370/12—Use of DVI or HDMI protocol in interfaces along the display data pipeline
-
- 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
- G09G2370/22—Detection of presence or absence of input display information or of connection or disconnection of a corresponding information source
Definitions
- the present invention relates to an apparatus and method for transmitting and receiving power using a high definition multimedia interface (HDMI), and more particularly, to a method and apparatus for transmitting power to a P-sink device using HDMI.
- HDMI high definition multimedia interface
- HDMI is an interface / standard developed for AV electronics using DVI (Digital Visual Interface), a standard for personal computers and displays.
- HDMI is a source that is transmitted from the player to the display device without compressing video / audio. There is little latency between the device and the sink device, and there is no need for a separate decoder chip or software, resulting in high format compatibility.
- video, audio, and control signals are all transmitted in one cable, simplifying the wiring of complex AV devices, and supporting high-bandwidth digital content protection (HDCP) for password protection. It can even provide protection.
- HDMI is an interface / standard developed for AV electronics using DVI (Digital Visual Interface), a standard for personal computers and displays.
- HDMI is a source that is transmitted from the player to the display device without compressing video / audio. There is little latency between the device and the sink device, and there is no need for a separate decoder chip or software, resulting in high format compatibility.
- video, audio, and control signals are all transmitted in one cable, simplifying the wiring
- HDMI high speed wired interfaces
- portable devices such as low-power smartphones, tablets, and ultra-notebooks
- high-speed wired devices such as HDMI and Displayport for viewing on devices with large screens (eg, TVs, projectors, etc.) outside of high-definition images played on these devices.
- the use of interfaces is increasing.
- a method of supplying power to a sink device using a high definition multimedia interface comprising: connecting to a source device via the HDMI; Not receiving a + 5V signal from the source device for a preset time; Supplying power to the source device via the connected HDMI at a preset power level; Receiving the + 5V signal from the source device; Transmitting a Hot Plug Detect (HPD) signal; Transmitting Extended Display Identification Data (EDID) information including power supply support information of the sink device to the source device; Receiving request power characteristic information of the source device; And supplying power to the source device based on the requested power characteristic information. It may include.
- HPD Hot Plug Detect
- EDID Extended Display Identification Data
- the power supply support information may include at least one of power supply enablement information indicating whether the sink device supports power supply or supply power level information indicating power level supported by the sink device, and HF-VSDB. (HDMI Forum-Vendor Specific Data Block).
- the requested power characteristic information may include at least one of request information for requesting the sink device to function as a power supply device or request power information indicating a power level to be supplied from the sink device, and SCDC (Status and Control data channel) parameter.
- request information for requesting the sink device to function as a power supply device or request power information indicating a power level to be supplied from the sink device
- SCDC Status and Control data channel
- the method for supplying power to the sink device may further include transmitting a ready message indicating that the sink device is ready to supply power; It may further include.
- the transmitting of the ready message may include writing a value indicating that the source device is ready to supply power to a ready field included in a status and control data channel structure (SCDCS) of the sink device. ; And transmitting the information indicated by the written ready field to the source device as the ready message. It may include.
- SCDCS status and control data channel structure
- a method of receiving power of a source device using a high definition multimedia interface comprising: connecting to a sink device through the HDMI; Receiving power from the sink device via the HDMI; Transmitting a + 5V signal to the sink device; Receiving a Hot Plug Detect (HPD) signal from the sink device; Receiving Extended Display Identification Data (EDID) information including power supply support information of the sink device from the sink device; Parsing the received EDID information to obtain the power supply support information; Transmitting the requested power characteristic information of the source device to the sink device; And receiving power from the sink device based on the requested power characteristic information. It may include.
- the power supply support information may include at least one of power supply enablement information indicating whether the sink device supports power supply or supply power level information indicating power level supported by the sink device, and HF-VSDB. (HDIM Forum-Vendor Specific Data Block).
- the requested power characteristic information may include at least one of request information for requesting the sink device to function as a power supply device or request power information indicating a power level to be supplied from the sink device, and SCDC (Status and Control data channel) parameter.
- request information for requesting the sink device to function as a power supply device or request power information indicating a power level to be supplied from the sink device
- SCDC Status and Control data channel
- the method for receiving power of the source device may further include receiving a preparation completion message indicating that the sink device is ready to supply the power from the sink device; It may further include.
- the receiving of the ready message may include receiving, as the ready message, power supply ready information indicated by a ready field included in a status and control data channel structure (SCDCS) of the sink device; Can be.
- SCDCS status and control data channel structure
- a sink device for supplying power using a high definition multimedia interface (HDMI), comprising: an HDMI receiver for transmitting and receiving data through the HDMI; A power control unit for controlling the power supply through the HDMI; And a control unit controlling the HDMI receiver and the power control unit.
- the sink device is connected to the source device via the HDMI, receives no + 5V signal from the source device for a preset time, and supplies power to the source device via the connected HDMI at a preset power level.
- HPD Hot Plug Detect
- EDID Extended Display Identification Data
- the power supply support information may include at least one of power supply enablement information indicating whether the sink device supports power supply or supply power level information indicating power level supported by the sink device, and HF-VSDB. (HDMI Forum-Vendor Specific Data Block).
- the requested power characteristic information may include at least one of request information for requesting the sink device to function as a power supply device or request power information indicating a power level to be supplied from the sink device, and SCDC (Status and Control data channel) parameter.
- request information for requesting the sink device to function as a power supply device or request power information indicating a power level to be supplied from the sink device
- SCDC Status and Control data channel
- the sink device may transmit a ready message indicating that the source device is ready to supply power.
- the sink device when transmitting the ready message, the sink device sets a value indicating that the source device is ready to supply power to a ready field included in a status and control data channel structure (SCDCS) of the sink device. Write, and the information indicated by the written ready field may be transmitted to the source device as the ready message.
- SCDCS status and control data channel structure
- a source device for receiving power using a high definition multimedia interface HDMI source for transmitting and receiving data through the HDMI; A power control unit controlling power reception via the HDMI; And a control unit for controlling the HDMI transmitter and the power control unit.
- the source device is connected to the sink device through the HDMI, receives power from the sink device through the HDMI, transmits a + 5V signal to the sink device, and sends an HPD (Hot) from the sink device.
- Receives a Plug Detect signal receives Extended Display Identification Data (EDID) information including power supply support information of the sink device from the sink device, parses the received EDID information, and receives the power supply support information.
- EDID Extended Display Identification Data
- Acquire transmit the requested power characteristic information of the source device to the sink device, and receive power from the sink device based on the requested power characteristic information.
- the power supply support information may include at least one of power supply enablement information indicating whether the sink device supports power supply or supply power level information indicating power level supported by the sink device, and HF-VSDB. (HDIM Forum-Vendor Specific Data Block).
- the requested power characteristic information may include at least one of request information for requesting the sink device to function as a power supply device or request power information indicating a power level to be supplied from the sink device, and SCDC (Status and Control data channel) parameter.
- request information for requesting the sink device to function as a power supply device or request power information indicating a power level to be supplied from the sink device
- SCDC Status and Control data channel
- the source device may receive a ready message indicating that the sink device is ready to supply the power from the sink device.
- the source device may receive, as the ready message, power supply ready information indicated by a ready field included in a status and control data channel structure (SCDCS) of the sink device. Can be.
- SCDCS status and control data channel structure
- power can be transmitted and received between the source device and the sink device through the HDMI, so that the source device can be supplied without a separate cable connection.
- the source device since the source device knows whether the sink device has a power supply capability through EDID information, the source device can receive power according to the type of the sink device.
- the P source device can supply power at an appropriate level.
- the P source device or the P sink device may perform power supply / reception at an optimal level by matching power information with the counterpart device.
- the P-sink device when the P-sink device needs to supply power, it can directly request power supply to the P-source device through the SCDCS. Therefore, even if the user does not need to set the power supply individually, the P-sink device can request the P-source device as needed, thereby eliminating user inconvenience.
- the source device or the sink device can detect that the battery of the external device is low or empty using a signal in the existing HDMI connection step, and transmit power to the external device.
- FIG. 1 is a block diagram illustrating an HDMI system according to an embodiment of the present invention.
- FIG. 2 is a flowchart illustrating a power transmission / reception operation of the HDMI system according to the first embodiment of the present invention.
- FIG. 3 is a flowchart illustrating a power transmission / reception operation of the HDMI system according to the second embodiment of the present invention.
- FIG. 4 is a flowchart illustrating a power transmission / reception operation of the HDMI system according to the third embodiment of the present invention.
- FIG. 5 is a flowchart illustrating a power transmission / reception operation of the HDMI system according to the fourth embodiment of the present invention.
- FIG. 6 is a flowchart illustrating a power transmission / reception operation of the HDMI system according to the fifth embodiment of the present invention.
- FIG. 7 is a flowchart illustrating a power transmission / reception operation of the HDMI system according to the sixth embodiment of the present invention.
- FIG. 8 is a flowchart illustrating an HDMI system for supplying power to a source device that is a low / dead battery according to an embodiment of the present invention.
- FIG. 9 is a flowchart illustrating an HDMI system that supplies power to a sink device that is a low / dead battery according to an embodiment of the present invention.
- FIG. 1 is a block diagram of an HDMI system according to an embodiment of the present invention.
- devices that transmit and receive video / audio / control data using HDMI will be collectively referred to as an HDMI system.
- the HDMI system may include a source device 100 and a sink device 200.
- a device for transmitting video / audio data through HDMI in the HDMI system may correspond to the source device 100
- a device for receiving video / audio data through HDMI may correspond to the sink device 200.
- an HDMI cable and connectors may be provided as a physical device that connects two devices to support data transmission and reception.
- HDMI cables and connectors can perform pairing of four channels providing a Transition Minimized Differential Signaling (TMDS) data channel and a TMDS clock channel.
- TMDS data channels can be used to carry video data, audio data and auxiliary data.
- the HDMI system provides VESA (Video Electronics Standards Association) Display Data Channel (DDC).
- DDC Video Electronics Standards Association
- the DDC is used to exchange configuration and status information between the source device and the sink device.
- the CEC protocol can provide high-level control between various audio visual products in the user's environment, and can be used optionally.
- the optional HDMI Ethernet and Audio Return Channel may provide Ethernet compatible data networking between Audio Return Channel (ARC) and connected devices in the opposite direction from the TMDS.
- Video data, audio data and additional data can be transmitted / received through three TMDS data channels.
- the TMDS clock typically runs the video pixel rate and is transmitted over the TMDS clock channel.
- the TMDS clock can be used as a frequency reference for data recovery on three TMDS data channels in the HDMI receiver.
- 8 bits of data per TMDS data channel are converted into 10 bits of DC balanced, transition-minimized sequence and serially transmitted at 10 bits per TMDS clock period. Can be.
- HDMI In order to transmit audio data and additional data over the TMDS channel, HDMI uses a packet structure. In order to achieve high reliability for audio data and control data, the data may be transmitted as 10-bit words generated using BCH error correction code and error reduction coding.
- the source device can find out the configuration information and possible functions of the sink device by reading Enhanced Extended Display Identification Data (E-EDID) of the Display Data Channel (DDC) sink device.
- E-EDID Enhanced Extended Display Identification Data
- DDC Display Data Channel
- the E-EDID may also be referred to as EDID information below.
- the utility line can be used for optional extensions such as HEAC.
- the source device 100 may receive Extended Display Identification Data (EDID) information from the sink device 200 through the DDC channel.
- EDID Extended Display Identification Data
- the source device 100 may recognize the configuration information and the support function of the sink device 200 by parsing the received EDID information.
- the EDID information may include at least one block including various information about the sink device 200.
- EDID information may include information on the function and power supply capability of the sink device 200 in power transmission and reception.
- the source device 100 may recognize the power transmission / reception capability of the sink device 200 through the EDID information, and thus may transmit power to or receive power from the sink device 200. .
- the source device 100 includes a display unit 110, a user input interface unit 120, a control unit 180, a transmitter (Tx), a memory unit 140, a storage unit 150, a multimedia unit 160, and a power source. At least one of the control unit 130 and the power supply unit 170.
- the sink device 200 includes an EDID EEPROM 210, a power control unit 220, a display unit 230, a user input interface unit 240, a receiver Rx, a control unit 280, and a power supply unit 250. , At least one of the memory unit 260 and the multimedia unit 270. In the following descriptions of units performing the same operation will not be duplicated.
- the source device 100 represents a physical device for transmitting or streaming content stored in the storage unit 150 to the sink device 200.
- the source device 100 may send a request message to the sink device 200 or may receive and process a request message received from the sink device 200.
- the source device 100 may provide a UI that processes and transmits a response message transmitted by the sink device 200 to the user in response to the transmitted request message, and the source device 100 includes the display unit 110. In this case, this UI may be provided as a display.
- the source device 100 may request the sink device 200 for power to be supplied.
- the sink device 200 may receive content from the source device 100, transmit a request message to the source device 100, or process a message received from the source device 100 to transmit a response message.
- the sink device 200 may also provide a user interface (UI) for processing a response message received from the source device 100 and delivering it to a user.
- UI user interface
- the sink device 200 includes a display unit, the UI may be provided. Can be provided as a display.
- the sink device 200 may supply the power requested by the source device 100 to the source device 100.
- the user input interface units 120 and 240 may receive a user action or input, and as an example, the user input interfaces 120 and 240 correspond to a remote controller, a voice receiving / recognizing device, a touch input sensing / receiving device, or the like. can do.
- the control units 180 and 280 may control the overall operation of each device.
- the control units 180 and 280 perform communication between units included in each device, and control the operation of each unit.
- the memory units 140 and 260 represent volatile physical devices in which various kinds of data are temporarily stored.
- the storage unit 150 represents a nonvolatile physical device capable of storing various kinds of data.
- EDID EEPROM 210 indicates an EEPROM that stores EDID information.
- the display units 110 and 230 may display data or content received through HDMI, data and UI stored in the memory unit under the control of the control units 180 and 280.
- the multimedia units 160 and 270 can reproduce various kinds of multimedia.
- the multimedia units 160 and 270 may be implemented separately from the control units 180 and 280, or may be implemented as one physical configuration with the control units 180 and 280.
- the power supply units 170 and 250 may supply power for the operation of the source device 100, the sink device 200, and the units included therein.
- the transmitter Tx is a unit provided in the source device 100 to transmit and receive data through HDMI.
- the transmitter Tx transmits and receives data including messages such as commands, requests, actions, and responses, as well as audio / video data.
- the receiver Rx is a unit provided in the sink device 200 to transmit and receive data through HDMI, and performs data transmission and reception including not only audio / video data but also messages such as commands, requests, actions, and responses between devices.
- the power control units 130 and 220 may manage and control power transmission and reception between devices through the transceiver.
- units except for the transmitter Rx, the receiver Tx, and the control units 180 and 280 may be selectively included in the source device 100 or the sink device 200 according to an embodiment, and may be necessary. It may not correspond to the constituent unit.
- the present specification proposes a method of ensuring optimal driving of the HDMI system without an external device by allowing the wired interface to support the power transfer function in the HDMI system.
- a device that supplies (or transmits) power will be referred to as a P source device, and a device that receives (or receives) power is referred to as a P sink device.
- a device that simultaneously supports the functions of the P source device and the P sync device will be referred to as a dual device.
- the source device operates as a P sink device or a dual device
- the sink device operates as a P source device.
- a sink device may transmit power supply support information to a source device (S2010).
- S2010 source device
- the source device may receive EDID information from the sink device.
- the EDID information received by the source device may include power supply support information of the sink device.
- the power supply support information may be included and transmitted in the HDMI Forum-Vendor Specific Data Block (HF-VSDB) in the EDID information.
- the power supply support information may include power supply availability information indicating that the sink device can support the P source function and / or supply power level information regarding a (maximum) power level that can be supplied to the P sink device as the P source device. .
- the source device can receive and parse such EDID information to obtain various information about the power supply capability of the sink device as the P source device.
- the source device may transmit the requested power characteristic information to the sink device (S2020).
- the source device is request power characteristic information, request information for requesting the sink device to function as a P source device, and / or request power information regarding (minimum) power level desired to be supplied from the sink device which is a P source device Can be sent to the sink device.
- the request information and / or the requested power characteristic information transmitted to the sink device are transmitted in a status and control data channel (SCDC) parameter format, and a request field (Power_Required_Source) of a status and control data channel structure (SCDCS) stored in the sink device. bit) and write (or set / update), respectively, in the power configuration register.
- the sink device may know the power level to be supplied with the power supply request of the source device by reading the updated field.
- the sink device may prepare to supply power to the source device (S2030). For example, the sink device may perform a circuit transition operation for physically supplying a desired level of power to the source device.
- the sink device may transmit a preparation completion message indicating that it is ready to supply power to the source device (S2040). More specifically, the sink device that is ready for power supply at the power level requested by the source device indicates that the ready field (Power_Supply_Ready bit) in the SCDCS indicates the ready for power supply (or the sink device functions as a P source). Can write with a preset value. The source device reads the updated field from the sink device to know that the sink device is ready to supply power. In this case, the sink device may transmit power supply preparation completion information indicated by the preparation field to the source device as a preparation completion message.
- the sink device may start to supply power to the source device (S2050). More specifically, the sink device may transmit the level of power requested by the source device to the source device through the HDMI cable.
- the source device additionally detects whether power is supplied (or provided) from the sink device and / or if so, what power level was supplied (ie, whether the power supply was successful or failed). This can be informed to the sink device. More specifically, the source device may transmit the supply status information indicating whether power supply from the sink device succeeded or failed in the SCDC parameter format to the sink device. In this case, the transmitted information may be written to a supply status field (Power_Supply_Status bit) in the SCDCS of the sink device, and the sink device may know whether the power transmission is successful by reading the updated corresponding field.
- a supply status field Power_Supply_Status bit
- the source device may wait for a predetermined time until power is supplied. For example, after receiving the information that the source device is ready for power supply from the sink device (S2040), the source device may wait for about 100 ms to receive the actual power. If the power is not received within 100 ms, the source device may return to step S2020 to renegotiate the power supply with the sink device, or may transmit a message to the sink device notifying the interruption of the power supply procedure.
- FIG. 3 is a flowchart illustrating a power transmission / reception operation of the HDMI system according to the second embodiment of the present invention.
- the source device operates as a P sink device
- the sink device operates as a dual device.
- the default function of the sink device may be a P source.
- FIG. 2 may be equally applied to the flowchart.
- the sink device may transmit power supply support information to a source device (S3010).
- the source device may receive EDID information from the sink device.
- the EDID information received by the source device may include power supply support information of the sink device.
- the power supply support information may be included in the HF-VSDB in the EDID information and transmitted and received.
- the power supply support information may include power supply / receivable information indicating that the sink device can support dual functions, and supply power level information regarding a maximum power level that can be supplied to the P sink device as a P source device.
- the source device may transmit the requested power characteristic information to the sink device (S3020).
- the source device may include, as requested power characteristic information, request information for requesting the sink device to function as a P source device and / or requested power information regarding (minimum) power level desired to be supplied from the sink device that is a dual device. Can be sent to the sink device.
- the request information and / or the requested power characteristic information transmitted to the sink device are transmitted in a status and control data channel (SCDC) parameter format, and a request field (Power_Required_Source) of a status and control data channel structure (SCDCS) stored in the sink device. bit) and write (or set / update), respectively, in the power configuration register.
- the sink device may know the power level to be supplied with the power supply request of the source device by reading the updated field.
- the sink device may prepare to supply power to the source device (S3030). For example, the sink device may perform a circuit transition operation for physically supplying a desired level of power to the source device.
- the sink device may transmit a preparation completion message indicating that it is ready to supply power to the source device (S3040).
- the sink device that is ready for power supply at the power level requested by the source device may indicate that the ready field (Power_Supply_Ready bit) in the SCDCS indicates the ready for power supply (or the sink device functions as a P source). Can write with set value.
- the source device reads the updated field from the sink device to know that the sink device is ready to supply power.
- the sink device may transmit power supply preparation completion information indicated by the preparation field to the source device as a preparation completion message.
- the sink device may start to supply power to the source device (S3050). More specifically, the sink device may transmit the level of power requested by the source device to the source device through the HDMI cable.
- the source device additionally detects whether power is supplied from the sink device and / or how much power level is supplied (ie, supply state information). This can be informed to the sink device.
- the source device may wait for a predetermined time until receiving power after step S3040.
- the functions of the respective source / sink devices are somewhat different, it can be seen that the overall operation of the HDMI system is the same for each embodiment. Therefore, when the power transmission protocols of the first and second embodiments are followed, there is an advantage that the HDMI system is simplified in that it is not necessary to apply different protocols according to the function of each device.
- FIG. 4 is a flowchart illustrating a power transmission / reception operation of the HDMI system according to the third embodiment of the present invention.
- the source device operates as a P source device or a dual device
- the sink device operates as a P sink device. 2 and 3 may be equally applicable to this flowchart.
- a sink device may transmit requested power characteristic information to a source device (S4010).
- the source device may receive EDID information from the sink device.
- the EDID information received by the source device may include the requested power characteristic information of the sink device.
- the requested power characteristic information may be included in the HF-VSDB in the EDID information and transmitted and received.
- the requested power characteristic information may include power reception information indicating that the sink device can support the P sink function and reception power level information regarding a minimum power level to be supplied from the P source device as the P sink device.
- the sink device may request the source device to supply power (S4020).
- a preset value for requesting power supply (or indicating that the sink device functions as a P sink) in a request field (Power_Required_Sink bit) indicating whether to request power supply in the SCDCS.
- the source device may receive the power supply request of the sink device by reading the updated corresponding field in the SCDCS of the sink device.
- the source device may prepare to supply power to the sink device (S4030).
- the source device may perform a circuit transition operation for physically supplying a desired level of power to the sink device.
- the sink device may also prepare to receive power stably from the source device. This operation may be selectively performed according to an embodiment.
- the source device may transmit a preparation completion message indicating that the sink device is ready to supply power at the requested power level (S4040).
- the source device may transmit a ready message to the sink device indicating that it is ready to supply power.
- the ready message is transmitted in the SCDC (Status and Control Data Channel) parameter format and is written (or set / updated) to the ready field (Power_Supply_Ready bit) of the Status and Control Data Channel Structure (SCDCS) stored in the sink device. Can be.
- the sink device may read the updated field in the SCDCS to know that the source device is ready to power on.
- the source device may start to supply power to the sink device (S4050). More specifically, the source device may transmit the level of power requested by the sink device to the source device through the HDMI cable.
- the source device may compare the power level that the sink device is to be supplied with the power level it can supply (before step S4040 or step S4030). If the two power levels match (that is, when the source device can supply the level of power requested by the sink device), the source device may continue to negotiate power with the sink device (for example, in step S4040). If, on the contrary, the two power levels do not match (that is, they are not the same), the source device may stop the power negotiation with the sink device. This operation may be selectively performed according to an embodiment, and other steps and orders may be changed.
- the sink device detects whether the power is supplied from the source device and / or if the power level is supplied (ie, supply state information).
- the source device can be informed. More specifically, the sink device may store information indicating whether power supply from the source device succeeded or failed in the supply status field (Power_Supply_Status bit) of the SCDCS. The source device can know whether the power transmission is successful by reading the updated corresponding field.
- the sink device may wait for a predetermined time until power is supplied after step S4040.
- FIG. 5 is a flowchart illustrating a power transmission / reception operation of the HDMI system according to the fourth embodiment of the present invention.
- the source device operates as a P source device
- the sink device operates as a dual device. 2 to 4 may be equally applicable to this flowchart.
- a sink device may transmit requested power characteristic information to a source device (S5010).
- the source device may receive EDID information from the sink device.
- the EDID information received by the source device may include the requested power characteristic information of the sink device.
- the requested power characteristic information may be included in the HF-VSDB in the EDID information and transmitted and received.
- the requested power characteristic information may include power supply / receivable information indicating that the sink device is capable of supporting dual functions, and received power level information regarding a minimum power level to be supplied from the P source device as the P sink device.
- the sink device may request the source device to supply power (S5020).
- a preset value for requesting power supply (or indicating that the sink device functions as a P sink) in a request field (Power_Required_Sink bit) indicating whether to request power supply in the SCDCS.
- the source device may receive the power supply request of the sink device by reading the updated corresponding field in the SCDCS of the sink device.
- the source device may prepare to supply power to the sink device (S5030).
- the source device may perform a circuit transition operation for physically supplying a desired level of power to the sink device.
- the sink device may also prepare to receive power stably from the source device. This operation may be selectively performed according to an embodiment.
- the source device may transmit a preparation completion message indicating that the sink device is ready to supply power at the requested power level (S5040). For example, the source device may transmit a ready message to the sink device indicating that it is ready to supply power.
- the ready message is transmitted in the SCDC (Status and Control Data Channel) parameter format and is written (or set / updated) to the ready field (Power_Supply_Ready bit) of the Status and Control Data Channel Structure (SCDCS) stored in the sink device. Can be.
- the sink device may read the updated field in the SCDCS to know that the source device is ready to power on.
- the source device may start to supply power to the sink device (S5050). More specifically, the source device may transmit the level of power requested by the sink device to the source device through the HDMI cable.
- the source device may compare the power level that the sink device is to be supplied with the power level it can supply (before step S5040 or step S5030). If the two power levels match (that is, when the source device can supply the level of power requested by the sink device), the source device may continue to negotiate power with the sink device (for example, step S5040). If, on the contrary, the two power levels do not match (that is, they are not the same), the source device may stop the power negotiation with the sink device. This operation may be selectively performed according to an embodiment, and other steps and orders may be changed.
- the sink device detects whether the power is supplied from the source device and / or if the power level is supplied (ie, supply state information).
- the source device can be informed. More specifically, the sink device may store information indicating whether power supply from the source device succeeded or failed in the supply status field (Power_Supply_Status bit) of the SCDCS. The source device can know whether the power transmission is successful by reading the updated corresponding field.
- the sink device may wait for a predetermined time until power is supplied after step S5040.
- FIG. 6 is a flowchart illustrating a power transmission / reception operation of the HDMI system according to the fifth embodiment of the present invention.
- both the source device and the sink device operate as dual devices.
- the sink device is a dual device
- the default function of the sink device may be a P source
- the default function of the source device may be a P sink.
- power transmission / reception operations when an external power adapter that supplies external power to a source device and a sink device are disconnected from each device will be described. 2 to 5 may be equally applied to this flowchart.
- a sink device may transmit power supply support information to a source device (S6010).
- the source device may receive EDID information from the sink device.
- the EDID information received by the source device may include power supply support information of the sink device.
- the power supply support information may be included in the HF-VSDB in the EDID information and transmitted and received.
- the power supply support information may include power supply availability information indicating that the sink device is capable of supporting dual functions and / or supply power level information regarding a (maximum) power level that can be supplied to the P sink device as a P source device.
- the source device may transmit the requested power characteristic information to the sink device (S6020).
- the source device may include, as requested power characteristic information, request information for requesting the sink device to function as a P source device and / or requested power information regarding (minimum) power level desired to be supplied from the sink device that is a dual device. Can be sent to the sink device.
- the request information and / or the requested power characteristic information transmitted to the sink device are transmitted in a status and control data channel (SCDC) parameter format, and a request field (Power_Required_Source) of a status and control data channel structure (SCDCS) stored in the sink device. bit) and write (or set / update), respectively, in the power configuration register.
- the sink device may know the power level that the source device wants to be supplied by reading the updated field.
- the sink device may prepare to supply power to the source device (S6030).
- the sink device may perform a circuit transition operation for physically supplying a desired level of power to the source device.
- the source device may also prepare to receive power stably from the sink device. This operation may be selectively performed according to an embodiment.
- the sink device may transmit a preparation completion message indicating that it is ready to supply power to the source device (S6040). More specifically, the sink device that is ready for power supply at the power level requested by the source device indicates that the ready field (Power_Supply_Ready bit) in the SCDCS indicates the ready for power supply (or the sink device functions as a P source). Can write with a preset value. The source device may know that the sink device is ready to supply power by reading the updated field. In this case, the sink device may transmit power supply ready information indicated by the ready field to the source device as a ready message.
- the ready field Power_Supply_Ready bit
- the sink device may start to supply power to the source device (S6050). More specifically, the sink device may transmit the level of power requested by the source device to the source device through the HDMI cable.
- the source device additionally detects whether power is supplied from the sink device and / or how much power level is supplied (ie, supply state information). This can be informed to the sink device.
- the source device may wait for a predetermined time until power is supplied after step S6040.
- FIG. 7 is a flowchart illustrating a power transmission / reception operation of the HDMI system according to the sixth embodiment of the present invention.
- both the source device and the sink device operate as dual devices.
- the sink device is a dual device
- the default function of the sink device may be a P source
- the default function of the source device may be a P sink.
- a power transmission / reception operation when an external power adapter that supplies external power to a source device is connected will be described.
- the present flowchart may be performed as the next operation of FIG. 6, and the above description of FIGS. 2 to 6 may be equally applied to the present flowchart.
- a source device may request a stop of power supply to a sink device (S7010).
- the sink device may stop supplying power to the source device (S7020).
- the sink device may stop supplying power to the source device according to a request to stop supplying power from the source device.
- the sink device may request power supply to the source device (S7030).
- a preset value for requesting power supply (or indicating that the sink device functions as a P sink) in a request field (Power_Required_Sink bit) indicating whether to request power supply in the SCDCS.
- the source device may receive the power supply request of the sink device by reading the updated corresponding field in the SCDCS of the sink device.
- the source device may prepare to supply power to the sink device (S7040).
- the source device may perform a circuit transition operation for physically supplying a desired level of power to the sink device.
- the sink device may also prepare to receive power stably from the source device. This operation may be selectively performed according to an embodiment.
- the source device may transmit a preparation completion message indicating that the sink device is ready to supply power at the requested power level (S7050). For example, the source device may transmit a ready message informing that the source device is ready to supply power to the sink device in operation S7050.
- the ready message is transmitted in the SCDC (Status and Control Data Channel) parameter format and is written (or set / updated) to the ready field (Power_Supply_Ready bit) of the Status and Control Data Channel Structure (SCDCS) stored in the sink device. Can be.
- the sink device may read the updated field in the SCDCS to know that the source device is ready to power on.
- the source device may start to supply power to the sink device (S7060). More specifically, the source device may transmit the level of power requested by the sink device to the source device through the HDMI cable.
- the source device can compare the power level that the sink device is to be supplied with the power level it can supply (before step S7050 or step S7040). If the two power levels match (that is, when the source device can supply the level of power requested by the sink device), the source device may continue to negotiate power with the sink device (for example, in step S7050). If, on the contrary, the two power levels do not match (that is, they are not the same), the source device may stop the power negotiation with the sink device. This operation may be selectively performed according to an embodiment, and other steps and orders may be changed.
- the sink device detects whether the power is supplied from the source device and / or if the power level is supplied (ie, supply state information).
- the source device can be informed. More specifically, the sink device may store information indicating whether power supply from the source device succeeded or failed in the supply status field (Power_Supply_Status bit) of the SCDCS. The source device can know whether the power transmission is successful by reading the updated corresponding field.
- the sink device may wait for a predetermined time until power is supplied after step S7050.
- the low / dead battery may mean a state in which the remaining power of the battery is lower than the preset level or exhausted, and thus the power is deactivated (or off).
- the source device operates as a P sink device, and the sink device operates as a P source device. 2 to 7 may be equally applied to this flowchart.
- the sink device when the sink device is connected to the source device through the HDMI cable, it is possible to check whether the + 5V signal is detected (S8010).
- the source device transmits (or applies) a + 5V signal to the sink device by switching the + 5V power line from low level to high level and applying a current.
- a source device with a battery level below a predetermined level ie, a source device with a low / dead battery
- the sink device may determine whether the source device is in a low / dead battery state based on whether the + 5V signal is detected.
- the + 5V signal cannot be transmitted to the sink device, and as a result, the sink device cannot detect the + 5V signal.
- the sink device may supply power (or default voltage and current) to the source device at a preset power level (S8020).
- the preset power level may be determined as the minimum power level required to perform power negotiation with the source device.
- the source device may transmit a + 5V signal to the sink device (S8030).
- the source device may receive power from the sink device and may be activated (or on) to transmit a + 5V signal to the sink device.
- the activated source device may transmit a + 5V signal to the sink device to receive EDID information from the sink device.
- the sink device may transmit a Hot Plug Detect (HPD) signal to the source device (S8040). More specifically, the sink device may switch the HPD line from low level to high level to inform the source device that the HDMI cable is properly connected and the EDID related circuitry is activated to allow access to EDID information.
- HPD Hot Plug Detect
- the source device and the sink device may perform the power negotiation according to the power negotiation and the power negotiation result according to the flowcharts of FIGS. 2 and 3. That is, the HDMI system may perform the operations of the flowcharts of FIGS. 2 and 3 as the next operation of step S8040.
- the power negotiation process of FIGS. 4 and 5 may be performed to receive the desired power.
- FIG. 9 is a flowchart illustrating an HDMI system that supplies power to a sink device that is a low / dead battery according to an embodiment of the present invention.
- the source device operates as a P source device and the sink device as a P sink device. 2 to 8 may be equally applied to this flowchart.
- the source device may transmit a + 5V signal to the sink device (S9010).
- the source device may check whether the HPD signal is detected from the sink device (S9020).
- the sink device with the remaining battery power receives a + 5V signal from the source device, the sink device transmits the HPD signal to the source device in response.
- a sink device having a remaining battery level below a preset level ie, a sink device having a low / dead battery
- the source device may determine whether the sink device is in a low / dead battery state based on whether the HPD signal is detected for a predetermined time after transmitting the + 5V signal.
- the source device since the sink device is in a low / dead battery state, the HPD signal cannot be transmitted to the source device, and as a result, the source device cannot detect the HPD signal (or may not receive the HPD signal).
- the source device may supply power (or a default voltage and current) to the sink device at a predetermined power level (S9030).
- the preset power level may be determined as the minimum power level required to perform power negotiation with the source device.
- the source device may transmit a + 5V signal to the sink device (S9040).
- the sink device may transmit a Hot Plug Detect (HPD) signal to the source device (S9050).
- HPD Hot Plug Detect
- the sink device receives power from the source device and is activated (or turned on) so that the sink device can transmit the HPD signal to the source device.
- the sink device may switch the HPD line from the low level to the high level to inform the source device that the HDMI cable is normally connected and the EDID related circuitry is activated to access EDID information.
- the source device can receive EDID information from the activated sink device.
- the source device and the sink device may perform power negotiation according to the flowcharts of FIGS. 4 and 5 and a power supply operation according to the power negotiation result. That is, the HDMI system may perform the operations of FIGS. 4 and 5 as the next operation of step S9050.
- the sink device may perform the power negotiation process of FIGS. 4 and 5 to receive the desired power.
- PSource field (1 bit): when set to '1', indicates that the sink device is capable of providing a power . That is, when set to '1', the sink device indicates to function as a P source.
- PSink field (1 bit): when set to '1', indicates that the sink device can consume power (when set to 1, the Sink device is willing to consume a power) . That is, when set to '1', the sink device indicates that it functions as a P sync.
- both the PSource field and the PSink field are set to '1', it may indicate that the sink device functions as dual.
- Voltage level field (3 bit): 0 (3.3V), 1 (5V), 2 (9V), 3 (12V), 4 (20V), 5 ⁇ 7: reserved for future use.
- the voltage of the level indicated by the voltage level field and the current of the level indicated by the current level field indicate the maximum power level that can be supplied by the sink device.
- the voltage of the level indicated by the voltage level field and the current of the level indicated by the current level field indicate the minimum power level consumed (or desired to be supplied) by the sink device.
- P sink device If set to '1', it indicates that the source device (P sink device) needs to be powered (or indicates that the sink device will function as a P source device).
- the source device When the source device operates as a P-sink device, it indicates the voltage / power level that the source device wants to receive.
- bit values set to indicate specific information is illustrated as '1', it may be set to another value according to an embodiment.
- the fields may be combined into one field to indicate specific information according to an embodiment.
- the drawings are divided and described, but the embodiments described in each drawing may be merged to implement a new embodiment.
- the display device is not limited to the configuration and method of the embodiments described as described above, the above embodiments are configured by selectively combining all or some of the embodiments so that various modifications can be made May be
- the present invention is used in the field of HDMI.
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Abstract
Description
Claims (20)
- HDMI(High Definition Multimedia Interface)를 사용한 싱크 기기의 전력 공급 방법에 있어서,상기 HDMI를 통해 소스 기기와 연결되는 단계;기설정된 시간 동안 상기 소스 기기로부터 +5V 신호를 미수신하는 단계;기설정된 전력 레벨로 상기 연결된 HDMI를 통해 상기 소스 기기에 전력을 공급하는 단계;상기 소스 기기로부터 상기 +5V 신호를 수신하는 단계;HPD(Hot Plug Detect) 신호를 전송하는 단계;상기 싱크 기기의 전력 공급 지원 정보가 포함된 EDID(Extended Display Identification Data) 정보를 상기 소스 기기로 전송하는 단계;상기 소스 기기의 요청 전력 특성 정보를 수신하는 단계; 및상기 요청 전력 특성 정보에 기초하여 상기 소스 기기에 전력을 공급하는 단계; 를 포함하는, 싱크 기기의 전력 공급 방법.
- 제 1 항에 있어서,상기 전력 공급 지원 정보는,상기 싱크 기기가 전력 공급 지원이 가능한지를 나타내는 전력 공급 가능 정보 또는 상기 싱크 기기가 지원하는 전력 레벨을 나타내는 공급 전력 레벨 정보 중 적어도 하나를 포함하며, 및HF-VSDB(HDMI Forum-Vendor Specific Data Block)으로서 수신되는, 싱크 기기의 전력 공급 방법.
- 제 1 항에 있어서,상기 요청 전력 특성 정보는,상기 싱크 기기가 전력 공급 기기로서 기능할 것을 요청하는 요청 정보 또는 상기 싱크 기기로부터 공급 받으려는 전력 레벨을 나타내는 요청 전력 정보 중 적어도 하나를 포함하며, 및SCDC(Status and Control Data Channel) 파라미터로서 전송되는, 싱크 기기의 전력 공급 방법.
- 제 1 항에 있어서,상기 소스 기기로 상기 전력을 공급할 준비가 완료되었음을 알리는 준비 완료 메시지를 전송하는 단계; 를 더 포함하는, 싱크 기기의 전력 공급 방법.
- 제 4 항에 있어서,상기 준비 완료 메시지를 전송하는 단계는,상기 싱크 기기의 SCDCS(Status and Control Data Channel Structure)에 포함된 준비 완료 필드에 상기 소스 기기로 상기 전력을 공급할 준비가 되었음을 지시하는 값을 기입하는 단계; 및상기 기입된 준비 완료 필드가 지시하는 정보를 상기 준비 완료 메시지로서 상기 소스 기기로 전송하는 단계; 를 포함하는, 싱크 기기의 전력 공급 방법.
- HDMI(High Definition Multimedia Interface)를 사용한 소스 기기의 전력 수신 방법에 있어서,상기 HDMI를 통해 싱크 기기와 연결되는 단계;상기 HDMI를 통해 상기 싱크 기기로부터 전력을 공급받는 단계;상기 싱크 기기로 +5V 신호를 전송하는 단계;상기 싱크 기기로부터 HPD(Hot Plug Detect) 신호를 수신하는 단계;상기 싱크 기기로부터 상기 싱크 기기의 전력 공급 지원 정보가 포함된 EDID(Extended Display Identification Data) 정보를 수신하는 단계;상기 수신한 EDID 정보를 파싱하여, 상기 전력 공급 지원 정보를 획득하는 단계;상기 소스 기기의 요청 전력 특성 정보를 상기 싱크 기기로 전송하는 단계; 및상기 싱크 기기로부터 상기 요청 전력 특성 정보에 기초하여 전력을 공급받는 단계; 를 포함하는, 소스 기기의 전력 수신 방법.
- 제 6 항에 있어서,상기 전력 공급 지원 정보는,상기 싱크 기기가 전력 공급 지원이 가능한지를 나타내는 전력 공급 가능 정보 또는 상기 싱크 기기가 지원하는 전력 레벨을 나타내는 공급 전력 레벨 정보 중 적어도 하나를 포함하며, 및HF-VSDB(HDIM Forum-Vendor Specific Data Block)으로서 수신되는, 소스 기기의 전력 수신 방법.
- 제 6 항에 있어서,상기 요청 전력 특성 정보는,상기 싱크 기기가 전력 공급 기기로서 기능할 것을 요청하는 요청 정보 또는 상기 싱크 기기로부터 공급 받으려는 전력 레벨을 나타내는 요청 전력 정보 중 적어도 하나를 포함하며, 및SCDC(Status and Control Data Channel) 파라미터로서 전송되는, 소스 기기의 전력 수신 방법.
- 제 6 항에 있어서,상기 싱크 기기로부터 상기 싱크 기기가 상기 전력을 공급할 준비가 완료되었음을 알리는 준비 완료 메시지를 수신하는 단계; 를 더 포함하는, 소스 기기의 전력 수신 방법.
- 제 9 항에 있어서,상기 준비 완료 메시지를 수신하는 단계는,상기 싱크 기기의 SCDCS(Status and Control Data Channel Structure)에 포함된 준비 완료 필드가 지시하는 전력 공급 준비 완료 정보를 상기 준비 완료 메시지로서 수신하는 단계; 인, 소스 기기의 전력 수신 방법.
- HDMI(High Definition Multimedia Interface)를 사용하여 전력을 공급하는 싱크 기기에 있어서,상기 HDMI를 통해 데이터를 송수신하는 HDMI 수신기;상기 HDMI를 통한 전력 공급을 제어하는 파워 제어 유닛; 및상기 HDMI 수신기 및 상기 파워 제어 유닛을 컨트롤하는 컨트롤 유닛; 을 포함하며,상기 싱크 기기는,상기 HDMI를 통해 소스 기기와 연결되고,기설정된 시간 동안 상기 소스 기기로부터 +5V 신호를 미수신하고,기설정된 전력 레벨로 상기 연결된 HDMI를 통해 상기 소스 기기에 전력을 공급하고,상기 소스 기기로부터 상기 +5V 신호를 수신하고,HPD(Hot Plug Detect) 신호를 전송하고,상기 싱크 기기의 전력 공급 지원 정보가 포함된 EDID(Extended Display Identification Data) 정보를 상기 소스 기기로 전송하고,상기 소스 기기의 요청 전력 특성 정보를 수신하고, 및상기 요청 전력 특성 정보에 기초하여 상기 소스 기기에 전력을 공급하는, 싱크 기기.
- 제 11 항에 있어서,상기 전력 공급 지원 정보는,상기 싱크 기기가 전력 공급 지원이 가능한지를 나타내는 전력 공급 가능 정보 또는 상기 싱크 기기가 지원하는 전력 레벨을 나타내는 공급 전력 레벨 정보 중 적어도 하나를 포함하며, 및HF-VSDB(HDMI Forum-Vendor Specific Data Block)으로서 수신되는, 싱크 기기.
- 제 11 항에 있어서,상기 요청 전력 특성 정보는,상기 싱크 기기가 전력 공급 기기로서 기능할 것을 요청하는 요청 정보 또는 상기 싱크 기기로부터 공급 받으려는 전력 레벨을 나타내는 요청 전력 정보 중 적어도 하나를 포함하며, 및SCDC(Status and Control Data Channel) 파라미터로서 전송되는, 싱크 기기.
- 제 11 항에 있어서,상기 싱크 기기는,상기 소스 기기로 상기 전력을 공급할 준비가 완료되었음을 알리는 준비 완료 메시지를 전송하는, 싱크 기기.
- 제 14 항에 있어서,상기 준비 완료 메시지를 전송하는 경우 상기 싱크 기기는,상기 싱크 기기의 SCDCS(Status and Control Data Channel Structure)에 포함된 준비 완료 필드에 상기 소스 기기로 상기 전력을 공급할 준비가 되었음을 지시하는 값을 기입하고,상기 기입된 준비 완료 필드가 지시하는 정보를 상기 준비 완료 메시지로서 상기 소스 기기로 전송하는, 싱크 기기.
- HDMI(High Definition Multimedia Interface)를 사용하여 전력을 수신하는 소스 기기에 있어서,상기 HDMI를 통해 데이터를 송수신하는 HDMI 송신기;상기 HDMI를 통한 전력 수신을 제어하는 파워 제어 유닛; 및상기 HDMI 송신기 및 상기 파워 제어 유닛을 컨트롤하는 컨트롤 유닛; 을 포함하며,상기 소스 기기는,상기 HDMI를 통해 싱크 기기와 연결되고,상기 HDMI를 통해 상기 싱크 기기로부터 전력을 공급받고,상기 싱크 기기로 +5V 신호를 전송하고,상기 싱크 기기로부터 HPD(Hot Plug Detect) 신호를 수신하고,상기 싱크 기기로부터 상기 싱크 기기의 전력 공급 지원 정보가 포함된 EDID(Extended Display Identification Data) 정보를 수신하고,상기 수신한 EDID 정보를 파싱하여, 상기 전력 공급 지원 정보를 획득하고,상기 소스 기기의 요청 전력 특성 정보를 상기 싱크 기기로 전송하고, 및상기 싱크 기기로부터 상기 요청 전력 특성 정보에 기초하여 전력을 공급받는, 소스 기기.
- 제 16 항에 있어서,상기 전력 공급 지원 정보는,상기 싱크 기기가 전력 공급 지원이 가능한지를 나타내는 전력 공급 가능 정보 또는 상기 싱크 기기가 지원하는 전력 레벨을 나타내는 공급 전력 레벨 정보 중 적어도 하나를 포함하며, 및HF-VSDB(HDIM Forum-Vendor Specific Data Block)으로서 수신되는, 소스 기기.
- 제 16 항에 있어서,상기 요청 전력 특성 정보는,상기 싱크 기기가 전력 공급 기기로서 기능할 것을 요청하는 요청 정보 또는 상기 싱크 기기로부터 공급 받으려는 전력 레벨을 나타내는 요청 전력 정보 중 적어도 하나를 포함하며, 및SCDC(Status and Control Data Channel) 파라미터로서 전송되는, 소스 기기.
- 제 16 항에 있어서,상기 소스 기기는,상기 싱크 기기로부터 상기 싱크 기기가 상기 전력을 공급할 준비가 완료되었음을 알리는 준비 완료 메시지를 수신하는, 소스 기기.
- 제 19 항에 있어서,상기 준비 완료 메시지를 수신하는 경우 상기 소스 기기는,상기 싱크 기기의 SCDCS(Status and Control Data Channel Structure)에 포함된 준비 완료 필드가 지시하는 전력 공급 준비 완료 정보를 상기 준비 완료 메시지로서 수신하는, 소스 기기.
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CN201680017353.XA CN107409242B (zh) | 2015-03-23 | 2016-03-22 | 使用hdmi发送/接收电力的方法和设备 |
KR1020177022150A KR20170130361A (ko) | 2015-03-23 | 2016-03-22 | Hdmi 를 사용하여 전력을 송수신하기 위한 방법 및 그 장치 |
JP2018500259A JP6490868B2 (ja) | 2015-03-23 | 2016-03-22 | Hdmiを使用して電力を送受信するための方法及びその装置 |
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US10038871B2 (en) | 2018-07-31 |
EP3276947B1 (en) | 2021-05-26 |
US20180048848A1 (en) | 2018-02-15 |
CN107409242A (zh) | 2017-11-28 |
EP3276947A4 (en) | 2018-10-31 |
KR20170130361A (ko) | 2017-11-28 |
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JP2018515047A (ja) | 2018-06-07 |
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