WO2013147332A1 - 고속 신호 전송과 전원 전달을 위한 케이블 및 보상 방법 - Google Patents
고속 신호 전송과 전원 전달을 위한 케이블 및 보상 방법 Download PDFInfo
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- WO2013147332A1 WO2013147332A1 PCT/KR2012/002207 KR2012002207W WO2013147332A1 WO 2013147332 A1 WO2013147332 A1 WO 2013147332A1 KR 2012002207 W KR2012002207 W KR 2012002207W WO 2013147332 A1 WO2013147332 A1 WO 2013147332A1
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- voltage
- line
- compensator
- power
- receiving side
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0264—Arrangements for coupling to transmission lines
- H04L25/0272—Arrangements for coupling to multiple lines, e.g. for differential transmission
- H04L25/0276—Arrangements for coupling common mode signals
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/0175—Coupling arrangements; Interface arrangements
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F5/00—Systems for regulating electric variables by detecting deviations in the electric input to the system and thereby controlling a device within the system to obtain a regulated output
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H17/00—Networks using digital techniques
- H03H17/02—Frequency selective networks
- H03H17/0248—Filters characterised by a particular frequency response or filtering method
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0264—Arrangements for coupling to transmission lines
- H04L25/028—Arrangements specific to the transmitter end
- H04L25/0282—Provision for current-mode coupling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
- H04L25/03114—Arrangements for removing intersymbol interference operating in the time domain non-adaptive, i.e. not adjustable, manually adjustable, or adjustable only during the reception of special signals
- H04L25/03146—Arrangements for removing intersymbol interference operating in the time domain non-adaptive, i.e. not adjustable, manually adjustable, or adjustable only during the reception of special signals with a recursive structure
Definitions
- the present specification relates to a cable and a compensation method for high-speed signal transmission and power transmission.
- LCDs liquid crystal displays
- PDPs plasma display panels
- HDTVs high-definition televisions
- the interface standard is used.
- the interface is classified into an external interface for connecting the display panels and peripheral devices such as a driving device and an internal interface for connecting the internal elements of the display panel.
- LVDS Low Voltage Differential Signaling
- LVDS is used as a general internal interface standard.
- LVDS is a technology that allows users to place analog and digital signal processing blocks on a separate board, a scaler board, to transfer data digitized by an analog-to-digital converter using a cable.
- low voltage (LV), or low voltage means that the LVDS uses 3.3V or 1.5V instead of 5V, which is a standard voltage.
- LVDS is widely used in laptop computers because fewer wires can be used on motherboards and display panels.
- DVI Digital Video / Visual Interactive
- DVI is used as a general external interface standard.
- DVI is a moving picture technology that can store images as digital data and play them back on a computer monitor.
- DVI is a method of sending images from a PC to digital rather than analogue.
- TMDS coding to reduce electromagnetic interference (EMI) during transmission and convert 8 bits of data into 10 bits for edge tracking. This is used.
- HDMI is an extension of DVI to consumer electronics, such as HDTV, with simple pin connections, smaller sizes, and the addition of digital audio. HDMI is widely used in cable receivers, Blu-ray players, and most HDTVs that handle high-definition video. HDTVs that use multiple video inputs, in particular, tend to have multiple HDMI ports.
- DisplayPort is a new digital display interface standard published by the Video Electronics Standard Association (VESA) that integrates generally separate internal and external interfaces.
- DisplayPort (DP) expands the data bandwidth by combining two interfaces into one, and delivers high-quality video signals by simultaneously delivering three 1080p streams at a bandwidth of 10.8Gbps, which is more than twice that of DVI.
- MHL Mobile High-Definition Link
- MHL is a standard for portable audio / video interfaces. It is an interface standard that allows a mobile terminal or other portable electronic device (eg, portable consumer electronics (CE)) to connect directly to high-definition televisions (HDTVs) or other display devices. .
- a mobile terminal or other portable electronic device eg, portable consumer electronics (CE)
- CE portable consumer electronics
- the MHL standard is capable of transmitting 1080p high-definition (HD) video and digital audio signals over a single cable with low pin-count.
- the MHL may transmit power for charging to a device connected with the transmission of the video and audio signals.
- the cable length becomes longer, and in this case, attenuation and transmission voltage of the transmitted signal decrease due to signal transmission characteristics of the cable and voltage drop corresponding to the cable. There may be a problem that can not increase the length of the cable.
- the present specification is to provide a cable and a compensation method for high-speed signal transmission and power transmission to the technical problem.
- a stable power supply can be made through the cable by compensating the voltage drop component corresponding to the power line included in the cable.
- a cable according to the present disclosure for achieving the above objects comprises: a cable connecting between a first device and a second device, comprising: a power line for transferring power from the first device to the second device; And a voltage compensator for compensating for voltage loss at the power receiving side of the second device generated based on the voltage drop corresponding to the power line.
- the voltage compensator may include a DC to DC converter or a boost converter.
- the voltage compensator may be one of compensating for the power receiving side voltage loss based on at least one of the line current flowing on the power line and the power receiving side voltage of the second device.
- the electronic device may further include a current detector configured to detect a line current flowing on the power line.
- the voltage compensator may compensate for the loss of the voltage of the power receiving side based on the sensed line current and the line resistance determined according to the length of the power line.
- the voltage compensator detects a voltage drop voltage by multiplying the sensed line current and the line resistance value, and the output voltage of the voltage compensator is the detected voltage to the input voltage of the voltage compensator. It may be to compensate for the loss of the voltage of the power receiving side by adjusting the drop voltage to be the voltage plus.
- the voltage compensator further includes a resistor corresponding to the line resistance value, wherein the voltage drop voltage is a voltage generated across the resistor based on the line current flowing through the resistor. It may be.
- the apparatus may further include a memory configured to store the line resistance value.
- the memory may be one time programmable memory (OTP).
- OTP one time programmable memory
- the memory may store line resistance values according to lengths of the power lines in a table form.
- the voltage compensator detects a voltage drop voltage by multiplying the sensed line current and the line resistance value, and detects a reference voltage by adding the detected voltage drop voltage and a target voltage.
- the output voltage of the voltage compensator may be adjusted to be the reference voltage to compensate for the loss of the power receiving side voltage.
- the target voltage may be a power receiving side voltage of the second device to be obtained through voltage compensation of the voltage compensator.
- the voltage compensator may be disposed at a power transmission side of the first device, a power reception side of the second device, or an intermediate point of the power line.
- a data line transferring a data signal from the second device to the first device; And a signal compensator for compensating for the loss of the data signal generated based on the signal transfer characteristic of the data line.
- the signal compensator may include a boosting amplifier or a decision feedback equalization (DFE).
- DFE decision feedback equalization
- the signal compensator may be disposed at a data receiving side of the first apparatus, a data transmitting side of the second apparatus, or an intermediate point of the data line.
- the voltage compensator obtains information on a voltage drop corresponding to the power line from the signal compensator, and calculates a voltage loss of the power receiving side based on the obtained information on the voltage drop. It may be to compensate.
- the data signal may be a differential data signal.
- a method of compensating a cable according to the present disclosure for achieving the above objects comprises the steps of: transferring power from a first device to a second device via a power line; Sensing a line current flowing on the power line; And compensating for the loss of the voltage at the power receiving side of the second device based on the sensed line current and the line resistance value determined according to the length of the power line.
- compensating the power receiving side voltage may include: detecting a voltage drop voltage by multiplying the sensed line current and the line resistance value; Detecting a reference voltage by adding the detected voltage drop voltage and a target voltage; And compensating for the loss of the power receiving side voltage by adjusting the voltage of the power transmitting side of the first device to be the reference voltage.
- a cable and a compensation method for high speed signal transmission and power transmission are provided.
- the stable and efficient power supply can be made through the cable by compensating the voltage drop component corresponding to the power line included in the cable.
- FIG. 1 is a block diagram showing the configuration of a cable according to the embodiments disclosed herein.
- FIG. 2 is a flowchart illustrating a cable compensating method according to embodiments disclosed herein.
- FIG. 3 is an exemplary diagram illustrating a method of arranging a voltage compensator according to a first embodiment disclosed herein.
- FIG. 4 is a flowchart illustrating a cable compensating method according to a second embodiment of the present disclosure.
- FIG. 5 is a flowchart illustrating a voltage compensating method based on sensed line current and line resistance values according to the second embodiment disclosed herein.
- FIG. 6 is a flowchart illustrating a voltage compensation method based on sensed line current and line resistance values according to yet another exemplary embodiment disclosed herein.
- FIG. 7 is an exemplary view illustrating a structure of a voltage compensator according to a second embodiment disclosed herein.
- FIG. 8 is an exemplary view illustrating a structure of a voltage compensator according to yet another exemplary embodiment disclosed herein.
- FIG. 9 is a flowchart illustrating a cable compensating method according to a third exemplary embodiment disclosed herein.
- FIG. 10 is an exemplary view illustrating a signal compensator according to a third embodiment disclosed herein.
- 11A to 11C are exemplary views illustrating the arrangement of the voltage compensator and the data compensator according to the third embodiment disclosed herein.
- FIG. 12 is an exemplary diagram showing a waveform of a signal of an MHL system.
- FIG. 13 is a conceptual diagram illustrating a signal compensation method in an MHL system.
- the technology disclosed herein can be applied to a method for compensating for the loss of data signals or power by cables and cables for high speed signal transmission and power delivery.
- the technology disclosed in the present specification is not limited thereto, and may be applied to a cable, a connection means, and a method for compensating for loss of data or power transmitted by the cable or the connection means connecting all devices to which the technical spirit of the technology can be applied. Can be.
- the technology disclosed herein includes a smart phone, a portable terminal, a mobile terminal, a personal digital assistant (PDA), and a portable multimedia player (PMP) terminal.
- notebook computers Wibro terminals, IPTV (Internet Protocol Television) terminals, digital broadcasting terminals, telematics terminals, navigation terminals, AVN (Audio Video Navigation) terminals, televisions, DVD players, set-top boxes, mobile phones, tablet PCs, digital cameras, 3D televisions, audio / video systems, home theater systems, information centers, call centers, etc. The same can be applied to various terminals.
- USB Universal Serial Bus
- HDMI High-Definition Multimedia Interface
- DP Display Port
- MHL Mobile High-Definition Link
- External charger port Wired / wireless data port
- memory card port port to connect devices equipped with identification module, audio input / output (I / O) port, video input / output (I / O) port, earphone port And the like.
- first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.
- first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.
- the cable according to the embodiments disclosed in the present disclosure includes a power line for transferring power from the first device to the second device and a power line in a cable connecting the first device and the second device. It may include a voltage compensator for compensating the voltage loss of the power receiving side of the second device generated based on the voltage drop.
- FIG. 1 is a block diagram showing the configuration of a cable according to the embodiments disclosed herein.
- the cable 100 may include a power line 110 and a voltage compensator 120.
- the cable 100 may further include a data line 130 and a signal compensator 140.
- the cable 100 may further include a first connector 210 and a second connector 220.
- the cable 100 may further include various components for high speed signal transmission and compensation of a voltage on a receiving side.
- the components shown in FIG. 1 are not essential, so that the cable 100 with more or less components may be implemented.
- the power line 110 is included in a cable connecting the first device 310 and the second device 320, and serves to transfer power from the first device 310 to the second device 320. can do.
- the first device 310 may be a transmission device for transmitting power to the second device 320.
- the first device is a high-definition televisions (HDTVs), Internet Protocol Televisions (IPTVs), digital broadcasting terminals, 3D televisions (Television), DVD players, set-top boxes, A / It may be a V (Audio / Video) system or a home theater system.
- the second device 320 may be a portable device that receives power from the first device 310 to charge a battery.
- the second device 320 may be a smart phone, a portable terminal, a mobile terminal, a personal digital assistant (PDA), or a portable multimedia player (PMP). It may be a terminal, a notebook computer, a Wibro terminal, a mobile phone, a tablet PC or a digital camera.
- PDA personal digital assistant
- PMP portable multimedia player
- the voltage compensator 120 may serve to compensate for a voltage loss on the power receiving side of the second device 320 generated based on the voltage drop corresponding to the power line 110.
- a line current for transmitting power from the first device 310 to the second device 320 may flow in the power line 110. Therefore, a voltage drop may occur in the power line 110 due to the resistance of the line current and the power line.
- a difference may occur between the voltage of the power supply (or power) (the first device 310) and the voltage from the power supply (or power) (the second device 320). . That is, the voltage drop may cause a loss of the voltage at the power receiving side of the second device 320.
- the voltage of the side receiving the power supply voltage (the second device 320) is usually determined to be within a specific range, when the cable is long, the specification is not satisfied due to the voltage drop caused by the resistance component. It can be a factor limiting the maximum length of. For example, a specification may be determined that allows an error range of ⁇ 10% at 5V with respect to the voltage level of the power receiving side of the second device 320, and when the length of the cable is 1.5 m or more, the power line If the voltage drop of 110 is greater than 0.5V, in the application of a particular interface, the maximum length of the cable may be limited to 1.5 m or less.
- the voltage compensator 120 serves to compensate for the voltage loss of the power receiving side of the second device 320 due to the voltage drop to increase the maximum allowable length of the cable. Can be.
- the voltage compensator 120 may be disposed at various positions in the cable.
- the voltage compensator 120 may be disposed at a power transmission side of the first device 310, a power reception side of the second device 320, or an intermediate point of the power line 110. .
- the voltage compensator 120 may compensate for the loss of the voltage at the power receiving side in various ways.
- the voltage compensator 120 compensates for the power receiving side voltage loss based on at least one of the line current flowing on the power line 110 and the voltage of the power receiving side of the second device 320. It may be.
- a method of compensating for the voltage receiving side voltage loss by the voltage compensator 120 will be described later in detail with reference to FIGS. 4 to 8.
- the data line 130 is included in the cable 100 and may serve to transfer a data signal from the second device 320 to the first device 310.
- the data signal may be a differential data signal.
- the data line 130 may be manufactured (or configured) with the same material or standard as the power line 110, but may be manufactured with a different material or different standard from the power line 110.
- the thickness of the data line 130 may be thinner than the thickness of the power line 110.
- the signal compensator 140 may compensate for the loss of the data signal generated based on the signal transmission characteristic of the data line 130.
- the signal compensator 140 may be configured in various forms or structures.
- the signal compensator 140 may be a boosting amplifier or an equalizer.
- the loss compensation method of the data signal by the signal compensator 140 will be described later in detail with reference to FIGS. 9 to 11B.
- the first connection unit 210 may serve to connect the first device 310 and the cable 100.
- the first connector 210 may include a pin (or port), a simple electric circuit, or an electronic circuit for connection between the first device 310 and the cable 100.
- the second connection unit 220 may serve to connect the second device 320 and the cable 100.
- the second connector 220 may include a pin (or port), a simple electric circuit, or an electronic circuit for connection between the second device 320 and the cable 100.
- the first connection portion 210 and the second connection portion 220 may be interpreted as a general term used in the art, a general means known in the art, and a detailed description thereof is omitted. do.
- the method of compensating for a cable includes transferring power from a first device to a second device through a power line and generating the second device based on a voltage drop corresponding to the power line. Compensating for the power receiving side voltage loss of the.
- FIG. 2 is a flowchart illustrating a cable compensating method according to embodiments disclosed herein.
- the cable compensation method according to the embodiments disclosed herein may be performed in the following steps.
- a method for compensating a cable may include transferring power from a first device to a second device through a power line (S110).
- the method of compensating for a cable may include compensating for a voltage receiving side voltage loss of the second device generated based on a voltage drop corresponding to the power line. (S120).
- the compensation of the power receiving side voltage loss may be based on at least one of a line current flowing on the power line and a power receiving side voltage of the second device.
- the step of transmitting a data signal from the second device to the first device via a data line and generated based on the signal transmission characteristics of the data line Compensating for the loss of the data signal may be further included.
- the first embodiment disclosed herein may be embodied in some or a combination of configurations or steps included in the above-described embodiments, or may be implemented in a combination of the embodiments, and the following provides a clear representation of the first embodiment disclosed herein. Duplicate parts can be omitted.
- the cable according to the first embodiment disclosed in the present specification is a power line for transmitting power from a first device to a second device and a voltage at the power receiving side of the second device generated based on a voltage drop corresponding to the power line. It may include a voltage compensator to compensate for the loss.
- the voltage compensator may be disposed at a power transmission side of the first device, a power reception side of the second device, or an intermediate point of the power line.
- FIG. 3 is an exemplary diagram illustrating a method of arranging a voltage compensator according to a first embodiment disclosed herein.
- the voltage compensator 120 may be disposed at various positions on a power line in the cable.
- the voltage compensator 120 may be disposed on the power receiving side of the second device 320 (or closer to the second device 320).
- the voltage compensator 120 has an output voltage Vr of the voltage compensator 120 added to a voltage drop voltage corresponding to the power line 110 to an input voltage V1 of the voltage compensator 120.
- the voltage may be adjusted to compensate for the voltage loss of the power receiving side of the second device 320.
- the voltage compensator 120 may compensate for the power loss side voltage loss by adjusting the output voltage Vr to be 5V, which is a voltage obtained by adding the voltage drop voltage 0.5V to the input voltage V1.
- the voltage compensator 120 may be disposed on the power transmission side of the first device 310 (or closer to the first device 310).
- the voltage compensator 120 has an output voltage V2 of the voltage compensator 120 added to a voltage drop voltage corresponding to the power line 110 to an input voltage Vt of the voltage compensator 120.
- the voltage may be adjusted to compensate for the voltage loss of the power receiving side of the second device 320.
- the voltage compensator 120 may compensate for the power loss side voltage loss by adjusting the output voltage V2 to be 5.5V, which is a voltage obtained by adding the voltage drop voltage 0.5V to the input voltage Vt. .
- the voltage compensator 120 may be disposed at an intermediate point of the power line 110.
- the voltage compensator 120 has an output voltage V4 of the voltage compensator 120 added to a voltage drop voltage corresponding to the power line 110 to an input voltage V3 of the voltage compensator 120.
- the voltage may be adjusted to compensate for the voltage loss of the power receiving side of the second device 320.
- the input voltage V3 is the power transmission side.
- the voltage may be attenuated by 0.25V, which is a voltage drop voltage corresponding to half the length of the power line, to be 4.75V.
- the voltage compensator 120 may compensate for the power receiving side voltage loss by adjusting the output voltage V4 to be 5.25V, which is a voltage obtained by adding the voltage drop voltage 0.5V to the input voltage V3.
- the power receiving side voltage may be attenuated by 0.25V, which is a voltage drop voltage corresponding to half of the power line length, to 5V.
- the voltage compensator 120 may be disposed at various positions on the power line 110, and the output voltage of the voltage compensator 120 is connected to the input voltage of the voltage compensator 120.
- a voltage drop corresponding to the entire voltage drop 110 may be adjusted to be a voltage added to compensate for the voltage loss of the power receiving side.
- the cable 100 when the voltage compensator 120 is disposed at the power transmission side, the cable 100 may be implemented by being included in the first connection unit 210.
- the cable 100 when the voltage compensator 120 is disposed on the power receiving side, the cable 100 may be implemented by being included in the second connector 220.
- the second embodiment disclosed herein may be embodied in some or a combination of configurations or steps included in the above-described embodiments, or may be implemented in a combination of embodiments, and the following clearly describes the second embodiment disclosed herein. Duplicate parts can be omitted.
- a cable includes a power line for transferring power from a first device to a second device, and a voltage at a power receiving side of the second device generated based on a voltage drop corresponding to the power line. It may include a voltage compensator to compensate for the loss.
- the voltage compensator may compensate the voltage loss on the power receiving side in various ways.
- the voltage compensator may compensate for the voltage loss on the power receiving side based on at least one of the line current flowing on the power line and the voltage on the power receiving side of the second device.
- the voltage compensator when the voltage compensator compensates for the power receiving side voltage loss based on the power receiving side voltage of the second device, the voltage compensator senses the voltage of the power receiving side (not shown). If the voltage of the power receiving side sensed by the voltage sensing unit is less than a predetermined standard voltage (for example, 5V ⁇ 0.5V) due to the voltage drop corresponding to the power line, The output voltage of the voltage compensator may be adjusted to be a voltage obtained by adding a voltage equal to the difference between the standard voltage and the power receiving side voltage to the input voltage of the voltage compensator to compensate for the voltage loss of the power receiving side.
- a predetermined standard voltage for example, 5V ⁇ 0.5V
- the voltage compensator may compensate for the loss of the voltage at the power receiving side based on the detected line current and a line resistance value determined according to the length of the power line.
- the voltage compensator detects a voltage drop voltage by multiplying the sensed line current and the line resistance value, and the output voltage of the voltage compensator is detected by the input voltage of the voltage compensator.
- the voltage drop voltage may be adjusted to be a voltage plus compensation for the loss of the voltage at the power receiving side.
- the voltage compensator detects a voltage drop voltage by multiplying the sensed line current and the line resistance value, and detects a reference voltage by adding the detected voltage drop voltage and a target voltage. And adjusting the output voltage of the voltage compensator to be the reference voltage to compensate for the loss of the power receiving side voltage.
- the target voltage may be a power receiving side voltage of the second device to be obtained through voltage compensation of the voltage compensator.
- FIG. 4 is a flowchart illustrating a cable compensating method according to a second embodiment of the present disclosure.
- the method of compensating a cable according to the second embodiment disclosed herein may be performed in the following steps.
- the cable compensation method according to the second embodiment disclosed in the present specification may transfer power from the first device to the second device through a power line (S210).
- the cable compensation method according to the second embodiment of the present disclosure may detect the line current flowing on the power line (S220).
- the method for compensating a cable according to the second embodiment disclosed in the present specification may compensate for a loss of a voltage at a power receiving side based on the detected line current and a line resistance value determined according to the length of the power line.
- S230 There is (S230).
- FIG. 5 is a flowchart illustrating a voltage compensating method based on sensed line current and line resistance values according to the second embodiment disclosed herein.
- the voltage compensation method based on the sensed line current and line resistance value according to the second embodiment disclosed herein may be performed in the following steps.
- the voltage compensation method based on a line current and a line resistance value may include detecting a voltage drop voltage by multiplying the sensed line current and the line resistance value (S231).
- the voltage compensation method based on the detected line current and the line resistance value, the output voltage of the voltage compensator is adjusted to the voltage of the input voltage of the voltage compensator plus the detected voltage drop voltage to receive the power Compensating for the loss of the side voltage may be included (S232).
- FIG. 6 is a flowchart illustrating a voltage compensation method based on sensed line current and line resistance values according to yet another exemplary embodiment disclosed herein.
- the voltage compensation method based on the sensed line current and line resistance value may be performed in the following steps.
- the voltage compensation method based on a line current and a line resistance value may include detecting a voltage drop voltage by multiplying the sensed line current and the line resistance value (S231).
- the voltage compensation method based on the detected line current and the line resistance value may include detecting the reference voltage by adding the detected voltage drop voltage and the target voltage (S233).
- the voltage compensation method based on the sensed line current and line resistance value includes adjusting the voltage of the power transmitting side of the first device to be the reference voltage to compensate for the loss of the power receiving side voltage. It may be (S234).
- the target voltage may be a power receiving side voltage of the second device to be obtained through voltage compensation of the voltage compensator.
- the voltage compensator may need to know the line resistance of the power line and the line current to compensate for the voltage loss at the power receiving side.
- the voltage compensator is compensated by the voltage compensator according to the length of the cable and the magnitude of the current.
- the amount of voltage applied may need to be adjusted. Since the length of the cable is fixed at the assembling step, the resistance value according to the length can be predicted at the assembling step. However, the amount of current supplied is determined when the actual cable is used in a communication system (or interface system), so it may not be predictable at the assembly stage. Thus, the magnitude of the current may need to be measured circuitally.
- the voltage compensator according to the second embodiment may further include a current detector to detect the line current flowing on the power line.
- the current detector may be implemented in various forms or structures.
- the current detector may be interpreted as a general term used in the art, and a detailed description thereof is omitted as a current sensing means generally known and applied in the art.
- the voltage compensator may need to include a resistance corresponding to the line resistance value or to store the line resistance value in order to perform the reception side voltage loss using the line resistance value.
- the voltage compensator may further include a resistor corresponding to the line resistance value, and the voltage drop voltage may be a voltage generated across the resistor based on the line current flowing through the resistor. have.
- the voltage compensator may flow the sensed line current to a resistor corresponding to the line resistance value, and detect the voltage drop voltage based on the voltage across the resistor.
- the voltage compensator may further include a memory for storing the line resistance value.
- the memory may be one time programmable memory (OTP).
- OTP time programmable memory
- the memory may store line resistance values according to lengths of the power lines in a table form.
- the voltage compensator may detect the length of the cable, obtain a line resistance value corresponding to the length of the cable, from a table stored in the memory, and use the voltage compensating voltage for the power receiving side.
- the voltage compensator may be implemented in various forms or structures.
- the voltage compensator may include a DC to DC converter or a boost converter.
- various types of voltage compensators may be applied to the voltage loss compensation method disclosed herein.
- FIG. 7 is an exemplary view illustrating a structure of a voltage compensator according to a second embodiment disclosed herein.
- the voltage compensator 120 may include a DC-DC converter that compensates for a voltage drop generated from the power line 110.
- the voltage compensator 120 includes a boost converter 121 as a DC-DC converter.
- the boost converter 121 may operate such that the output voltage Vout becomes a voltage obtained by adding a specific voltage to the input voltage Vin.
- the input voltage Vin may be a voltage transferred from the power transmission side of the first device to the boost converter 121, and the output voltage Vout is a voltage drop corresponding to the power line 110.
- the voltage loss due to may be a compensated voltage.
- the output voltage Vout may be transferred back to the power receiving side of the second device.
- the specific voltage may be determined based on various criteria. For example, the specific voltage may be determined such that the voltage of the power receiver side of the second device is a voltage to be obtained through loss compensation of the voltage of the power receiver side. Also, for example, the specific voltage may be a voltage drop voltage corresponding to the power line 110.
- the voltage compensator 120 is configured to connect the power line.
- the line current flowing in the 100 may be sensed.
- the voltage compensator 120 may include a current sensing means (or a current detector, not shown) for sensing the line current.
- the voltage compensator 120 may detect the voltage drop voltage by multiplying the sensed line current by the line resistance value.
- the voltage compensator 120 adjusts the output voltage Vout of the voltage compensator 120 to a voltage obtained by adding the detected voltage drop voltage to the input voltage Vin of the voltage compensator 120. Voltage loss on the power receiving side can be compensated.
- the operation (or boosting operation) of adding the voltage drop voltage to the input voltage Vin may be performed by the boost converter 121.
- Control for the output voltage Vout to be a voltage obtained by adding the specific voltage to the input voltage Vin may be performed by controlling a switch included in the boost converter 121.
- the operation of the boost converter 121 is a technique generally known in the art, a detailed description thereof will be omitted.
- FIG. 8 is an exemplary view illustrating a structure of a voltage compensator according to yet another exemplary embodiment disclosed herein.
- the voltage compensator 120 may include a boost converter 121, a controller 122, a multiplier 123, an adder 124, and a current detector 125.
- the boost converter 121, the controller 122, the multiplier 123, the adder 124, and the current detector 125 may be implemented in various forms or structures.
- the multiplier 123 may include a resistor corresponding to a line resistance value corresponding to the power line 110, as described above.
- the voltage drop voltage corresponding to the power line 110 may be a voltage generated across the resistor based on the line current flowing through the resistor.
- the output voltage Vout 'of the voltage compensator 120 may be applied to the power line 1110 and the ground (or ground) line 1120 constituting the power line 110.
- the output voltage Vout ' may be a voltage drop through the power line 110 to become a load voltage Vout.
- the current detector 125 detects (or detects) a line current Isense flowing through the power line 110.
- the detected line current Isense may be transmitted to the multiplier 123.
- the multiplier 123 may detect the voltage drop voltage by multiplying the detected line current and the line resistance value Rcable corresponding to the power line, and transfer the voltage drop voltage value to the adder 124. .
- the adder 124 may detect a reference voltage by adding a target voltage Vtarget to the voltage drop voltage value, and transmit the reference voltage value to the controller 122.
- the target voltage Vtarget may be a power receiving side voltage (or load voltage Vout) of the second device to be obtained through voltage compensation of the voltage compensator.
- the voltage of the power transmission side (or the input voltage Vin) of the first device is 4.75V lower than the rated (or standard) voltage of 5V, and the voltage drop value corresponding to the power line 110 is 0.5.
- the target voltage may be 5V, which is the rated voltage even if the power transmission side voltage is 4.75V. That is, in this case, the target voltage Vtarget may be an ideal voltage (target voltage or rated voltage) that the power receiving side should receive.
- the controller 122 may control the boost converter 121 such that the output voltage Vout 'becomes the reference voltage value Vtarget + Isense ⁇ Rcable to the input voltage Vin (eg, Control of a switch included in the boost converter (121).
- the third embodiment disclosed herein may be embodied in some or a combination of configurations or steps included in the above-described embodiments, or may be implemented in a combination of embodiments, and the following clearly describes the third embodiment disclosed herein. Duplicate parts can be omitted.
- a cable includes a power line for transferring power from a first device to a second device, and a voltage at a power receiving side of the second device generated based on a voltage drop corresponding to the power line. It may include a voltage compensator to compensate for the loss.
- a signal for compensating for the loss of the data signal generated on the basis of the signal transmission characteristics of the data line and the data line for transmitting a data signal from the second device to the first device It may further include a compensator.
- FIG. 9 is a flowchart illustrating a cable compensating method according to a third exemplary embodiment disclosed herein.
- the cable compensating method according to the third exemplary embodiment disclosed herein may be performed in the following steps.
- the method for compensating for a cable may include transferring power from a first device to a second device through a power line (S110).
- the method of compensating for a cable according to the third embodiment of the present disclosure may include compensating for a voltage loss on the power receiving side of the second device generated based on the voltage drop corresponding to the power line.
- the method of compensating for a cable according to the third embodiment disclosed herein may include transmitting a data signal from the second device to the first device through a data line (S130).
- the method for compensating for a cable may include compensating for the loss of the data signal generated based on the signal transmission characteristic of the data line (S140).
- the cable according to the third embodiment may include a data line transferring a data signal from the second device to the first device.
- the cable according to the third embodiment of the data signal is generated based on the signal transmission characteristics of the data line together with a voltage compensator for compensating the voltage loss of the power receiving side due to the voltage drop corresponding to the power line.
- a signal compensator may be further included to compensate for the loss.
- the signal compensator may be implemented in various forms or structures.
- the signal compensator may include various types of equalizers.
- the signal compensator When the signal compensator is implemented as an equalizer, it may be most common to use a circuit having high-pass frequency characteristics so as to compensate for low-pass frequency characteristics of a cable.
- the signal compensator may include a boosting amplifier, which is an analog equalizer.
- the signal compensator may include a decision feedback equalization (DFE) which is an equalizer in the form of a digital filter.
- DFE decision feedback equalization
- the signal compensator may be implemented in various forms or structures.
- FIG. 10 is an exemplary view illustrating a signal compensator according to a third embodiment disclosed herein.
- FIG. 10A illustrates a case where the signal compensator includes a boosting amplifier 141, and a case where data transmitted from the second device is a differential signal.
- the boosting amplifier 141 may receive the differential signals Vin and Vinb and output an output signal in which high frequency components are emphasized. Since the operation of the boosting amplifier 141 is generally known in the art, a detailed description thereof will be omitted.
- the signal compensator may have a frequency characteristic in which a specific frequency band is emphasized (or amplified) to compensate for a loss of a high frequency band due to signal transmission characteristics of the data line.
- 11A to 11C are exemplary views illustrating the arrangement of the voltage compensator and the data compensator according to the third embodiment disclosed herein.
- the voltage compensator 120 transmits the power of the first device, the power receiving side of the second device, or the power on the power line 110 included in the cable 100. It may be disposed at an intermediate point of the line.
- the signal compensator 14 is disposed on the data receiving side of the first device, the data transmitting side of the second device, or an intermediate point of the data line on the data line 130 included in the cable 100. It may be.
- nine arrangements of the voltage compensator 120 and the signal compensator 140 that may exist in the cable 100 may exist according to an arrangement combination. .
- the cable and the method of compensating the cable according to the embodiments disclosed herein may be applied to various fields as described above.
- the cables disclosed herein can be applied to protocol or interface technologies related to various wired communications.
- a universal serial bus (USB) port a high-definition multimedia interface (HDMI) port, a display port (DP), a mobile high-definition link (MHL), a wired / wireless headset port, an external charger port, Wired / wireless data port, memory card port, port to connect device equipped with identification module, audio input / output (I / O) port, video input / output (I / O) port, earphone port, etc.
- USB universal serial bus
- HDMI high-definition multimedia interface
- DP display port
- MHL mobile high-definition link
- Wired / wireless data port a wired / wireless headset port
- memory card port a port to connect device equipped with identification module
- audio input / output (I / O) port audio input / output (I / O) port
- video input / output (I / O) port earphone port
- MHL Mobile High-Definition Link
- FIG. 12 is an exemplary diagram showing a waveform of a signal of an MHL system.
- MHL Mobile High Definition Link
- data is transmitted through a pair of differential signals Sdp and Sdn, and the common-mode level of the differential signal is different.
- Scm can be modulated to transmit a clock signal.
- the signal compensator 140 may compensate for signal attenuation of the differential signals Sdp and Sdn due to signal transmission characteristics of the data line 130. For example, compensation of signal attenuation of the differential signals Sdp and Sdn may be performed by the boosting amplifier 141.
- FIG. 13 is a conceptual diagram illustrating a signal compensation method in an MHL system.
- the boosting amplifier 141 may basically amplify a differential signal and reject a common-mode signal. Therefore, when compensating for signal attenuation of an MHL signal (or differential signal) through the boosting amplifier 141, modulation of a common-mode level (Scm) indicating a clock signal is performed. Most of the components are attenuated so that they do not appear in the outputs Vout and Voutb. Therefore, in case of the MHL signal, the equalizer u110 compensates for the signal attenuation of the differential signal, which is a data component, and the common-mode level (Scm) is a separate circuit (CM level extractor). , u120 can be restored.
- MHL signal or differential signal
- CM level extractor common-mode level
- the signal combiner u130 may generate an MHL signal by recombining with the output of the boosting amplifier 141 after the restoration of the common-mode level Scm.
- the boosting amplifier 141 or any other circuit may simultaneously perform attenuation compensation of differential (Sdp, Sdn) signals and processing modulated components of a common-mode level (Scm). If it can, it can be implemented to perform all operations in one circuit.
- the MHL cable may also include a power line capable of transferring power from the first device to the second device.
- MHL is a standard for portable audio / video interfaces. It is an interface standard that allows mobile terminals or other portable electronics (such as portable consumer electronics (CE)) to be directly connected to high-definition televisions (HDTVs) or other display devices.
- the first device may be high-definition televisions (HDTVs) or other display devices
- the second device may be a mobile terminal or other portable electronic device (eg, portable consumer electronics (CE)).
- the MHL cable may include a voltage compensator (eg, a DC-DC converter) for compensating for the voltage drop by the resistance component of the power line included in the MHL cable.
- a voltage compensator eg, a DC-DC converter
- the voltage compensator may serve to compensate for the voltage loss of the power receiving side of the second device generated based on the voltage drop corresponding to the power line.
Abstract
Description
Claims (21)
- 제 1 장치 및 제 2 장치 간을 연결하는 케이블에 있어서,상기 제 1 장치로부터 상기 제 2 장치로 전력을 전달하는 전력 라인; 및상기 전력 라인에 해당하는 전압강하를 근거로 발생하는 상기 제 2 장치의 전력 수신측 전압 손실을 보상하는 전압 보상기를 포함하는 것을 특징으로 하는 케이블.
- 제1항에 있어서, 상기 전압 보상기는,DC-DC 변환기(DC to DC converter) 또는 부스트 컨버터(boost converter)를 포함하는 것인 케이블.
- 제1항에 있어서, 상기 전압 보상기는,상기 전력 라인 상에 흐르는 라인 전류 및 상기 제 2 장치의 전력 수신측 전압 중 적어도 하나를 근거로 상기 전력 수신측 전압 손실을 보상하는 것인 케이블.
- 제1항에 있어서,상기 전력 라인 상에 흐르는 라인 전류를 감지하는 전류 감지기를 더 포함하는 것을 특징으로 하는 케이블.
- 제4항에 있어서, 상기 전압 보상기는,상기 감지된 라인 전류 및 상기 전력 라인의 길이에 따라 결정되는 라인 저항값을 근거로 상기 전력 수신측 전압의 손실을 보상하는 것인 케이블.
- 제5항에 있어서, 상기 전압 보상기는,상기 감지된 라인 전류 및 상기 라인 저항값을 곱하여 전압강하 전압을 검출하고,상기 전압 보상기의 출력전압이 상기 전압 보상기의 입력전압에 상기 검출된 전압강하 전압을 더한 전압이 되도록 조절하여 상기 전력 수신측 전압의 손실을 보상하는 것인 케이블.
- 제6항에 있어서, 상기 전압 보상기는,상기 라인 저항값에 해당하는 저항기를 더 포함하고,상기 전압강하 전압은,상기 저항기에 흐르는 상기 라인 전류를 근거로 상기 저항기 양단에 생성되는 전압인 것인 케이블.
- 제5항에 있어서,상기 라인 저항값을 저장하는 메모리를 더 포함하는 것을 특징으로 하는 케이블.
- 제8항에 있어서, 상기 메모리는,OTP(One Time Programmable Memory)인 것인 케이블.
- 제8항에 있어서, 상기 메모리는,상기 전력 라인의 길이에 따른 라인 저항값을 테이블 형태로 저장하는 것인 케이블.
- 제5항에 있어서, 상기 전압 보상기는,상기 감지된 라인 전류 및 상기 라인 저항값을 곱하여 전압강하 전압을 검출하고,상기 검출된 전압강하 전압 및 목표 전압을 더하여 기준 전압을 검출하고,상기 전압 보상기의 출력전압이 상기 기준 전압이 되도록 조절하여 상기 전력 수신측 전압의 손실을 보상하는 것인 케이블.
- 제11항에 있어서, 상기 목표 전압은,상기 전압 보상기의 전압 보상을 통하여 획득하고자 하는 상기 제 2 장치의 전력 수신측 전압인 것인 케이블.
- 제1항에 있어서, 상기 전압 보상기는,상기 제 1 장치의 전력 송신측, 상기 제 2 장치의 전력 수신측 또는 상기 전력 라인의 중간 지점에 배치되는 것인 케이블.
- 제1항에 있어서,상기 제 2 장치로부터 상기 제 1 장치로 데이터 신호를 전달하는 데이터 라인; 및상기 데이터 라인의 신호전달특성을 근거로 발생하는 상기 데이터 신호의 손실을 보상하는 신호 보상기를 더 포함하는 것을 특징으로 하는 케이블.
- 제14항에 있어서, 상기 신호 보상기는,부스팅 증폭기(boosting amplifier) 또는 DFE(decision feedback equalization)를 포함하는 것인 케이블.
- 제14항에 있어서, 상기 신호 보상기는,상기 제 1 장치의 데이터 수신측, 상기 제 2 장치의 데이터 송신측 또는 상기 데이터 라인의 중간 지점에 배치되는 것인 케이블.
- 제14항에 있어서, 상기 전압 보상기는,상기 신호 보상기로부터 상기 전력 라인에 해당하는 전압강하에 대한 정보를 획득하고,상기 획득된 전압강하에 대한 정보를 근거로 상기 전력 수신측 전압 손실을 보상하는 것인 케이블.
- 제14항에 있어서, 상기 데이터 신호는,차동(differential) 데이터 신호인 것인 케이블.
- 전력 라인을 통하여 제 1 장치로부터 제 2 장치로 전력을 전달하는 단계;상기 전력 라인 상에 흐르는 라인 전류를 감지하는 단계; 및상기 감지된 라인 전류 및 상기 전력 라인의 길이에 따라 결정되는 라인 저항값을 근거로 상기 제 2 장치의 전력 수신측 전압의 손실을 보상하는 단계를 포함하는 것을 특징으로 하는 케이블의 보상방법.
- 제19항에 있어서, 상기 전력 수신측 전압을 보상하는 단계는,상기 감지된 라인 전류 및 상기 라인 저항값을 곱하여 전압강하 전압을 검출하는 단계;상기 검출된 전압강하 전압 및 목표 전압을 더하여 기준 전압을 검출하는 단계; 및상기 제 1 장치의 전력 송신측 전압이 상기 기준 전압이 되도록 조절하여 상기 전력 수신측 전압의 손실을 보상하는 단계를 포함하는 것을 특징으로 하는 케이블의 보상방법.
- 제19항에 있어서,데이터 라인을 통하여 상기 제 2 장치로부터 상기 제 1 장치로 데이터 신호를 전달하는 단계; 및상기 데이터 라인의 신호전달특성을 근거로 발생하는 상기 데이터 신호의 손실을 보상하는 단계를 더 포함하는 것을 특징으로 하는 케이블의 보상방법.
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KR1020137023573A KR20130120542A (ko) | 2012-03-27 | 2012-03-27 | 고속 신호 전송과 전원 전달을 위한 케이블 및 보상 방법 |
PCT/KR2012/002207 WO2013147332A1 (ko) | 2012-03-27 | 2012-03-27 | 고속 신호 전송과 전원 전달을 위한 케이블 및 보상 방법 |
US14/376,151 US20150015078A1 (en) | 2012-03-27 | 2012-03-27 | Cable and compensation method for transmitting high speed signal and delivering power |
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PCT/KR2012/002207 WO2013147332A1 (ko) | 2012-03-27 | 2012-03-27 | 고속 신호 전송과 전원 전달을 위한 케이블 및 보상 방법 |
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