CN106657941A - Photoelectric hybrid DisplayPort long-distance transmission device and method - Google Patents
Photoelectric hybrid DisplayPort long-distance transmission device and method Download PDFInfo
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- CN106657941A CN106657941A CN201611236439.XA CN201611236439A CN106657941A CN 106657941 A CN106657941 A CN 106657941A CN 201611236439 A CN201611236439 A CN 201611236439A CN 106657941 A CN106657941 A CN 106657941A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/22—Adaptations for optical transmission
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Abstract
The invention provides a photoelectric hybrid DisplayPort long-distance transmission device. The device comprises a Source end signal conversion module, a photoelectric hybrid cable and a Skin end signal restoration module, wherein the output end of the Source end signal conversion module is connected with the input end of the Sink end signal restoration module through the photoelectric hybrid cable; a DP signal is input from the Source end signal conversion module and output from the Sink end signal restoration module. The invention further provides a photoelectric hybrid DisplayPort long-distance transmission method. The method and device provided by the invention have the advantages that a low cost stable transmission scheme of a video and audio signal under the ultra-long distance condition is realized, the radiation is low, the power consumption is low, the debugging is unnecessary, the reliability is high, an external power source is unnecessary, and the device is plug and play.
Description
Technical field
The present invention relates to transmitting device, more particularly to a kind of DisplayPort long distance transmitters of photoelectricity mixing with
Method.
Background technology
In recent years, with the fast development for supporting high-definition digital multimedia interface technology, such as giant-screen high definition LED liquid crystal
The application of the high definition digital medium information long-distance transmissions to remote display device such as TV, high definition projecting apparatus, commercial advertisement screen
Demand also increases rapidly.
At present, engineering commonly uses in practice based on the scheme of HDMI host-host protocols to solve high-definition digital signal long distance
The problem of transmission, but this kind of scheme has following defect：First, HDMI host-host protocols receive patent protection, the side of increased
Case use cost；Second, due to being shaken hands come the communication for carrying out Source ends and Sink ends using I2C signals, in order to avoid I2C's
Transistor-Transistor Logic level appearance when long-distance transmission is carried out slows down and the phenomenon of caused loss of data because of its low and high level change procedure, then
Must be converted into higher signal or differential signal just can guarantee that the stability of long-distance transmission, thus undesirably increase electricity
The power consumption in source；Third, " R ", " G ", " B " the three signals phase place one within the same clock cycle in due to HDMI host-host protocols
Cause, EMI is too high when causing transmission.
Therefore, research and develop that one kind ensure that long-distance transmission performance and using method is simple, lower-cost multi-media signal
Long-distance transmission device has very high realistic meaning.
The content of the invention
In order to solve the problems of the prior art, the invention provides a kind of DisplayPort of photoelectricity mixing is remote
Transmitting device and method.
The invention provides a kind of DisplayPort long distance transmitters of photoelectricity mixing, including Source end signals
Modular converter, photoelectric mixed cable and Sink end signal recovery modules, wherein, the output of described Source end signal modular converters
End is connected with the input of the Sink end signals recovery module by the photoelectric mixed cable, and DP signals are from the Source ends
Signal conversion module is input into, and is first changed the differential pair electric signal in DP electric signals by the Source end signals modular converter
For optical signal, then, optical signal and control electric signal are carried out into together long-distance transmissions via the photoelectric mixed cable, finally,
Optical signal is reduced into differential pair electric signal by Sink end signals recovery module to use for downstream DP remote equipments.
As a further improvement on the present invention, the input of the Source end signals modular converter is connected with DP signals
Source, the output end of the Sink end signals recovery module is connected with DP remote equipments.
As a further improvement on the present invention, the photoelectric mixed cable includes oversheath, and shielding is provided with the oversheath
Line, fiber unit, electric unit and aramid fiber filler, the fiber unit is four-core fiber unit, for transmitting four groups of DP
The optical signal that differential pair electric signal is converted, the electric unit is used to transmit the control signal in DP signals.
As a further improvement on the present invention, the shielding line includes foil shielding layer, earth mat and connection, four core
Fiber unit includes semi-tight sleeve and the colored optical fiber being arranged in the semi-tight sleeve, and the electric unit includes insulating barrier and is arranged on
Copper conductor in the insulating barrier.
As a further improvement on the present invention, described Source end signals modular converter include Source ends DP interfaces,
Source ends DC power supply circuit, Source ends ESD protection chips, electro-optic conversion main circuit, electro-optic conversion enable control circuit
And optical signal transmitter, the input of Source ends DC power supply circuit is connected with the Source ends DP interfaces, described
Source ends DC power supply circuit is respectively the electro-optic conversion main circuit by output end and electro-optic conversion enables control circuit
Energy supply, the Source ends ESD protections chip is connected with the input of the electro-optic conversion main circuit, and the electro-optic conversion is enabled
The output end of control circuit is connected with the input of electro-optic conversion main circuit, the output end of the electro-optic conversion main circuit with it is described
The input connection of optical signal transmitter, the four-core fiber list of the output end of the optical signal transmitter and the photoelectric mixed cable
Unit's connection, the optical signal after electro-optic conversion is delivered to the defeated of the Sink end signals recovery module by the four-core fiber unit
Enter end.
As a further improvement on the present invention, the Sink end signals modular converter includes Sink ends DP interfaces, Sink ends
DC power supply circuit, Sink ends ESD protection chips, opto-electronic conversion main circuit, opto-electronic conversion enable control circuit and optical signal connect
Device is received, the input of Sink ends DC power supply circuit is with the output end of Source ends DC power supply circuit by described
The electric unit connection of photoelectric mixed cable, Sink ends DC power supply circuit is respectively the main electricity of the opto-electronic conversion by output end
Road and opto-electronic conversion enable control circuit energy supply, and the Sink ends ESD protects the input of chip and the opto-electronic conversion main circuit
End connection, the opto-electronic conversion enables the output end of control circuit and is connected with the input of opto-electronic conversion main circuit, the photoelectricity
Conversion main circuit input be connected with the output end of the optical signal receiver, the output end of the opto-electronic conversion main circuit and
The Sink ends DP interfaces connection, the differential pair electric signal obtained after being reduced by the opto-electronic conversion main circuit and DP control signals
Pass to upstream device by the Sink ends DP interfaces together to use.
As a further improvement on the present invention, described Source end signal modular converters contain 2722 four-way laser
Device driving chip, the 2722 four-way laser driving chip mainly by programmed circuit, four electro-optic conversion amplifying circuits and
Four enable logical block composition, and the programmed circuit is connected respectively with four electro-optic conversion amplifying circuits, wherein, it is described
Programmed circuit is mainly made up of Memory Controller and the temperature controller being connected with the Memory Controller again, the storage
Device controller is that various control parameters distribute memory space, and four logical blocks that enable control respectively four electric light turn
That changes amplifying circuit opens enable, and it is defeated with " ACT0's " according to differential pair signal voltage difference size, the output level of " ACT1 "
Enter level to determine to enable ALT-CH alternate channel, the electro-optic conversion amplifying circuit is first converted into the differential pair electric signal of input single-ended
Signal, then the current difference of the single-ended signal is amplified, finally the signal output after amplification is used to the optical signal transmitter
To be changed into the optical signal with intensity difference and export to the fiber unit carrying out remote transmission.
As a further improvement on the present invention, the optical signal transmitter includes four vertical cavity surface emitting lasers and
45 degree of fiber arrays of transmitting terminal of individual Unit four, the input of the vertical cavity surface emitting laser and the main electricity of the electro-optic conversion
The output end connection on road, the input of 45 degree of fiber arrays of the transmitting terminal and the output end of the vertical cavity surface emitting laser
Connection, the output end of 45 degree of fiber arrays of the transmitting terminal is connected with the input of the fiber unit.The vertical cavity surface is sent out
Penetrate and be transformed into perpendicular to circuit board after single-ended signal of the laser instrument reception by the output of 2722 four-way laser driving chips
The laser signal of transmitting.The laser signal is reflected into after the signal parallel with circuit board via 45 degree of fiber arrays of the transmitting terminal
Into fiber unit transmission.
As a further improvement on the present invention, the Sink end signals modular converter contains 2712 transimpedance amplifiers,
2712 transimpedance amplifier mainly by four input signal detection units, light signal strength detector unit, four photoelectricity also
Former amplifying circuit, output amplitude level controller and four DC offset circuits composition, the photoelectric reduction amplifying circuit it is defeated
Enter end to be connected with the output end of the optical signal receiver, input and the optical signal of the input signal detection unit connect
The output end connection of device is received, the output end of the input signal detection unit is connected with the photoelectric reduction amplifying circuit, described
Light signal strength detector unit is connected with the output end of the optical signal receiver, the output amplitude level controller respectively with
Four photoelectric reduction amplifying circuit connections, the DC offset circuit is connected with the photoelectric reduction amplifying circuit, wherein,
The light signal strength detector unit is by detecting the total current for flowing through the optical signal receiver come the intensity to input signal
Detected, the input signal detection unit is according to whether have signal input to control whether that opening the photoelectric reduction amplifies
Circuit, the photoelectric reduction amplifying circuit enters park mode when without signal input, and the optical signal of input is first via described
Optical signal receiver is converted into the electric signal with weak current difference, then will be input into letter by the photoelectric reduction amplifying circuit
Number current difference be amplified, be finally reduced into can supply equipment read differential pair electric signal, by the output amplitude
Level controller carries out register assignment can be realized setting the amplitude of signal output difference, the DC compensation electricity
Realize that the differential pair amplitude of photoelectric reduction amplifying circuit reality output and amplitude set in advance keep one by negative-feedback in road
Cause.
As a further improvement on the present invention, the optical signal receiver includes four photodiodes and Unit four
45 degree of fiber arrays of receiving terminal.The input of 45 degree of fiber arrays is connected with the output end of the fiber unit, described
The output end of 45 degree of fiber arrays is connected with the input of the photodiode, the output end of the photodiode with it is described
The input connection of opto-electronic conversion main circuit.The optical signal of the fiber unit output enters 45 degree of fiber arrays of the receiving terminal
It is changed into the optical signal parallel to circuit board afterwards, the signal is changed into perpendicular to circuit board after 45 degree of fiber array reflections of receiving terminal
Photodiode input signal, the optical signal of input is changed into after single-ended electrical signal and exports to 2712 by the photodiode
Transimpedance amplifier is to by the differential pair signal needed for signals revivification into upstream device.
Present invention also offers a kind of DisplayPort remote transmission methods of photoelectricity mixing, DP signals are from Source
End signal modular converter is input into, and is first turned the differential pair electric signal in DP electric signals by the Source end signals modular converter
Optical signal is changed to, then, optical signal and control electric signal long-distance transmissions is carried out into together via photoelectric mixed cable, finally, is led to
Cross Sink end signals recovery module optical signal is reduced into differential pair electric signal and use for downstream DP remote equipments.
The invention has the beneficial effects as follows：By such scheme, a kind of video and audio signal is realized in overlength distance bar
The lower cost solution of stable transmission under part, radiation is low, low in energy consumption, and without the need for debugging, reliability is high, without the need for external power supply, that is, inserts i.e.
With.
Description of the drawings
Fig. 1 is a kind of schematic diagram of the DisplayPort long distance transmitters of photoelectricity mixing of the invention.
Fig. 2 is that a kind of photoelectric mixed cable section of the DisplayPort long distance transmitters of photoelectricity mixing of the invention shows
It is intended to.
Fig. 3 is a kind of Source end signals conversion of the DisplayPort long distance transmitters of photoelectricity mixing of the invention
The electro-optic conversion main circuit schematic diagram of module.
Fig. 4 is a kind of Source end signals conversion of the DisplayPort long distance transmitters of photoelectricity mixing of the invention
The electro-optic conversion of module enables control circuit schematic diagram.
Fig. 5 is a kind of Source end signals conversion of the DisplayPort long distance transmitters of photoelectricity mixing of the invention
The principle schematic of the Source ends DP interfaces of module.
Fig. 6 is a kind of Source end signals conversion of the DisplayPort long distance transmitters of photoelectricity mixing of the invention
The Source ends ESD of module protects the principle schematic of chip.
Fig. 7 is a kind of Source end signals conversion of the DisplayPort long distance transmitters of photoelectricity mixing of the invention
The principle schematic of the Source ends DC power supply circuit of module.
Fig. 8 is a kind of Sink end signals also grand master pattern of the DisplayPort long distance transmitters of photoelectricity mixing of the invention
The opto-electronic conversion main circuit schematic diagram of block.
Fig. 9 is a kind of Sink end signals also grand master pattern of the DisplayPort long distance transmitters of photoelectricity mixing of the invention
The opto-electronic conversion of block enables the principle schematic of control circuit.
Figure 10 is a kind of Sink end signals also grand master pattern of the DisplayPort long distance transmitters of photoelectricity mixing of the invention
The principle schematic of the Sink ends DP interfaces of block.
Figure 11 is a kind of Sink end signals also grand master pattern of the DisplayPort long distance transmitters of photoelectricity mixing of the invention
The Sink ends ESD of block protects the principle schematic of chip.
Figure 12 is a kind of Sink end signals also grand master pattern of the DisplayPort long distance transmitters of photoelectricity mixing of the invention
The principle schematic of the Sink ends DC power supply circuit of block.
Figure 13 is a kind of 2722 four-way laser instruments of the DisplayPort long distance transmitters of photoelectricity mixing of the invention
Driving chip workflow schematic diagram.
Figure 14 is a kind of 2712 transimpedance amplifiers of the DisplayPort long distance transmitters of photoelectricity mixing of the invention
Workflow schematic diagram.
Figure 15 is a kind of optical signal transmitter work of the DisplayPort long distance transmitters of photoelectricity mixing of the invention
Flow chart.
Figure 16 is a kind of optical signal receiver work of the DisplayPort long distance transmitters of photoelectricity mixing of the invention
Flow chart.
Specific embodiment
Below in conjunction with the accompanying drawings the invention will be further described for explanation and specific embodiment.
Referring to Fig. 1, a kind of schematic diagram of the DisplayPort long distance transmitters of photoelectricity mixing, including Source ends
Signal conversion module 100, photoelectric mixed cable 200 and Sink end signals recovery module 300, wherein, the Source end signals turn
The output end of mold changing block 100 is connected with the input of the Sink end signals recovery module 300 by the photoelectric mixed cable 200
Connect, the input of the Source end signals modular converter 100 is connected with DP signal sources, the Sink end signals recovery module
300 output end is connected with DP remote equipments, and DP (Display Port) signals are from described Source end signal moduluss of conversion
Block 100 is input into, and exports from the Sink end signals recovery module 300.
Referring to Fig. 2, the photoelectric mixed cable 200 includes 202, five electric units 203 of a four-core fiber unit and one
Shielding line 204, aramid fiber filler 205 and oversheath 201, oversheath is preferably black polyurethane elastic body jacket, institute
State four-core fiber unit 202 for transmit the optical signal that converted by four groups of DP differential pair electric signals, five electric units
203 are used to transmit five control signals in DP signals, and the shielding line 204 includes foil shielding layer 2041, connection and ground
Net, the four-core fiber unit 202 includes semi-tight sleeve 2021 and the colored optical fiber 2022 being arranged in the semi-tight sleeve 2021, institute
Electric unit 203 is stated including insulating barrier 2031 and the copper conductor 2032 being arranged in the insulating barrier 2031.
Referring to Fig. 3 to Fig. 7, Source end signals modular converter 100 is using 2722 four-way laser driving chips as work(
Energy core, whole module includes following components：Electro-optic conversion main circuit, electro-optic conversion enable control circuit, Source ends
DP interfaces, Source ends ESD protection chips, Source ends DC power supply circuit and optical signal transmitter.Wherein, the Source
The input of end DC power supply circuit is connected with the Source ends DP interfaces, and Source ends DC power supply circuit is by defeated
Go out end and be respectively the electro-optic conversion main circuit, electro-optic conversion enable control circuit energy supply, the Source ends ESD protects chip
It is connected with the input of the electro-optic conversion main circuit, the electro-optic conversion enables the output end of control circuit and electro-optic conversion master
The input connection of circuit, the output end of the electro-optic conversion main circuit is connected with the input of the optical signal transmitter, institute
State the output end of optical signal transmitter to be connected with the four-core fiber unit of the photoelectric mixed cable, the optical signal after electro-optic conversion leads to
Cross the input that the four-core fiber unit is delivered to the Sink end signals recovery module.Wherein, Source ends ESD protections core
Piece selects RClamp0524, and it is resistant to the transient voltage of ± 8KV, it is ensured that enough safety allowances.Source ends dc source
Circuit from LDO power supplys " SPX3819M5 " and Switching Power Supply " M1541 " by input voltage " V_1 " be separately converted to " V_2 " and
" V_3 ", wherein " V_2 " is the main power supply of electro-optic conversion chip " 2722 " and the auxiliary power supply of control chip " W104 ", " V_3 " Jing
Come for the energy supply of Sink end signals recovery module 300 by the transmission of electric unit 203 of the photoelectric mixed cable 200.Chip " W104 " leads to
Cross the output level of control " ACT1 " pin and the incoming level of " ACT0 " pin to control master chip " 2722 " inner passage
Enable.
Referring to Fig. 8 to Figure 12, Sink end signals recovery module 300 using photoelectric conversion chip " 2712 " as leitungskern,
Whole module includes following components：Opto-electronic conversion main circuit, opto-electronic conversion enable control circuit, Sink ends DP interfaces,
Sink ends ESD protection chips, Sink ends DC power supply circuit and optical signal receiver.Wherein, Sink ends dc source electricity
The electric unit 203 that the input on road passes through the photoelectric mixed cable 200 with the output end of Source ends DC power supply circuit
Connection, Sink ends DC power supply circuit is respectively the opto-electronic conversion main circuit, opto-electronic conversion and enables control by output end
Circuit energy supply processed, the Sink ends ESD protections chip is connected with the input of the opto-electronic conversion main circuit, the opto-electronic conversion
Enable control circuit output end be connected with the input of opto-electronic conversion main circuit, the input of the opto-electronic conversion main circuit and
The output end connection of the optical signal receiver, the output end of the opto-electronic conversion main circuit connects with the Sink ends DP interfaces
Connect, the differential pair electric signal obtained after being reduced by the opto-electronic conversion main circuit passes through the Sink ends together with DP control signals
DP interfaces pass to upstream device and use.Wherein, the selection of Sink ends ESD protections chip is identical with Source ends.Sink ends
DC power supply circuit is separately converted to input voltage " V_3 " from LDO power supplys " SPX3819M5 " and Switching Power Supply " 3804 "
" V_4 " and " V_5 ", wherein " V_4 " is the main power supply of photoelectric conversion chip " 2712 " and the auxiliary power supply of control chip " W104 ",
" V_5 " powers for the kernel of chip " 2712 ".Chip " W104 " is controlled by controlling the level of " OL " pin and " SD " pin
The enable of master chip " 2712 " inner passage.The four groups of differential pair electric signals obtained via chip " 2712 " photoelectric reduction and other
Point control signal is used together by Sink ends DP interfaces for DP remote equipments.
Referring to Figure 13, the single passage of the 2722 four-way laser driving chip supports 20Mbps to 12.5Gbps's
Data rate.The chip is mainly made up of programmed circuit 14, electro-optic conversion amplifying circuit 15 and enable logical block 16.Wherein,
The programmed circuit 14 is made up of Memory Controller and temperature controller again, and the Memory Controller is various control parameters
Distribution memory space.Four described enable that logical block 16 controls respectively four electro-optic conversion amplifying circuits open enable, its
Determine that enabling conversion leads to according to the incoming level of differential pair signal voltage difference size, the output level of " ACT1 " and " ACT0 "
Road.The differential pair electric signal of input is first converted into single-ended signal by the electro-optic conversion amplifying circuit 15, then by the single-ended signal
Current difference amplify, finally by the signal output after amplification to the optical signal transmitter to be changed into strength difference
The optical signal of property simultaneously exports to the fiber unit to carry out remote transmission.By the programming to the temperature controller, chip
It is capable of achieving to automatically adjust output current according to environment temperature so that the transmission performance of optical signal remains high-level state.
Referring to Figure 14,2712 transimpedance amplifier is the four-way transimpedance amplifier for being integrated with limiting amplifier,
Its single passage supports the data rate of 20Mbps to 12.5Gbps.The chip is mainly strong by input signal detection 17, optical signal
Degree detection 15, photoelectric reduction amplifying circuit 19, output amplitude level controller 20 and DC offset circuit 21 are constituted.Wherein, institute
State light signal strength to detect by detecting the total current for flowing through the optical signal receiver to examine the intensity of input signal
Survey.The input signal detection 17 is according to whether have signal input to control whether to open photoelectric reduction amplifying circuit 19, photoelectricity
Reduction amplifying circuit 19 is when without signal input into park mode reaching the purpose of energy-conserving and environment-protective.The optical signal elder generation of input
The electric signal with weak current difference is converted into via the optical signal receiver, then by the photoelectric reduction amplifying circuit
19 are amplified the current difference of input signal, are finally reduced into the differential pair electric signal that equipment can be supplied to read.By to institute
Stating output amplitude level controller 20 and carry out register assignment can realize setting the amplitude of signal output difference, institute
State DC offset circuit 21 and the differential pair amplitude of photoelectric reduction amplifying circuit reality output is realized by negative-feedback and is set in advance
Fixed amplitude is consistent, so as to ensure the reliable and stable of output signal.
Referring to Figure 15, the optical signal transmitter includes sending out for four vertical cavity surface emitting lasers and Unit four
The 45 degree of fiber arrays in end are penetrated, the input of the vertical cavity surface emitting laser connects with the output end of the electro-optic conversion main circuit
Connect, the input of 45 degree of fiber arrays of the transmitting terminal is connected with the output end of the vertical cavity surface emitting laser, described
The output end for penetrating the 45 degree of fiber arrays in end is connected with the input of the fiber unit.The vertical cavity surface emitting laser is received
Being transformed into believing perpendicular to the laser of circuit board launch after the single-ended signal exported by 2722 four-way laser driving chips
Number.The laser signal is reflected into after the signal parallel with circuit board via 45 degree of fiber arrays of the transmitting terminal and enters fiber unit
Transmission.
Referring to Figure 16, the optical signal receiver includes 45 degree of light of receiving terminal of four photodiodes and Unit four
Fibre array.The input of 45 degree of fiber arrays is connected with the output end of the fiber unit, 45 degree of fiber arrays
Output end is connected with the input of the photodiode, the output end of the photodiode and the opto-electronic conversion main circuit
Input connection.The optical signal of the fiber unit output is changed into parallel to electricity into after 45 degree of fiber arrays of the receiving terminal
The optical signal of road plate, the signal is changed into defeated perpendicular to the photodiode of circuit board after 45 degree of fiber array reflections of receiving terminal
Enter signal, the photodiode is changed into the optical signal of input after single-ended electrical signal to export to be used to 2712 transimpedance amplifiers
With by the differential pair signal needed for signals revivification into upstream device.
Present invention also offers a kind of DisplayPort remote transmission methods of photoelectricity mixing, DP signals are from Source
End signal modular converter 100 is input into, by the Source end signals modular converter 100 first by the differential pair electricity in DP electric signals
Signal is converted to optical signal, then, is at a distance passed optical signal and control electric signal together via photoelectric mixed cable 200
Defeated, finally, optical signal is reduced into differential pair electric signal by Sink end signals recovery module 300 makes for downstream DP remote equipments
With.
The invention discloses a kind of DisplayPort long distance transmitters of photoelectricity mixing, the device first passes through described
Differential pair electric signal in DP electric signals is first converted to optical signal by Source end signals modular converter 100, then, via described
Optical signal and control electric signal are carried out together long-distance transmissions by photoelectric mixed cable 200, finally, by Sink end signals also grand master pattern
Optical signal is reduced into differential pair electric signal and is used for downstream DP remote equipments by block 300.The beneficial effect of apparatus of the present invention is：It is logical
Such scheme is crossed, easily generation shake, decay etc. are bad existing during long-distance transmission effectively to solve DP differential pair electric signals
As so affect the deficiency of transmission quality, realize a kind of video and audio signal under the conditions of overlength distance stable transmission it is low
Cost approach,, without the need for debugging, reliability is high, without the need for external power supply, plug and play for it.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to assert
The present invention be embodied as be confined to these explanations.For general technical staff of the technical field of the invention,
On the premise of without departing from present inventive concept, some simple deduction or replace can also be made, should all be considered as belonging to the present invention's
Protection domain.
Claims (10)
1. the DisplayPort long distance transmitters that a kind of photoelectricity mixes, it is characterised in that：Including the conversion of Source end signals
Module, photoelectric mixed cable and Sink end signal recovery modules, wherein, the output end of described Source end signal modular converters with
The input of the Sink end signals recovery module is connected by the photoelectric mixed cable, and DP signals are from the Source end signals
Modular converter is input into, and first the differential pair electric signal in DP electric signals is converted into light by the Source end signals modular converter
Signal, then, long-distance transmissions is carried out together via the photoelectric mixed cable by optical signal and control electric signal, finally, is passed through
Optical signal is reduced into differential pair electric signal and is used for downstream DP remote equipments by Sink end signals recovery module.
2. the DisplayPort long distance transmitters that photoelectricity according to claim 1 mixes, it is characterised in that：It is described
The input of Source end signal modular converters is connected with DP signal sources, the output end connection of the Sink end signals recovery module
There are DP remote equipments, the photoelectric mixed cable includes oversheath, shielding line, fiber unit, electric unit are provided with the oversheath
With aramid fiber filler, the fiber unit is four-core fiber unit, for four groups of DP differential pairs electric signal conversions of transmission
The optical signal for coming, the electric unit is used to transmit the control signal in DP signals.
3. the DisplayPort long distance transmitters that photoelectricity according to claim 2 mixes, it is characterised in that：It is described
Shielding line includes foil shielding layer, earth mat and connection, and the four-core fiber unit includes semi-tight sleeve and is arranged on described half
Colored optical fiber in tight set, the electric unit includes insulating barrier and the copper conductor being arranged in the insulating barrier.
4. the DisplayPort long distance transmitters that photoelectricity according to claim 2 mixes, it is characterised in that：It is described
Source end signals modular converter include Source ends DP interfaces, Source ends DC power supply circuit, Source ends ESD protection
Chip, electro-optic conversion main circuit, electro-optic conversion enable control circuit and optical signal transmitter, Source ends dc source electricity
The input on road is connected with the Source ends DP interfaces, and Source ends DC power supply circuit is respectively institute by output end
State electro-optic conversion main circuit and electro-optic conversion enables control circuit energy supply, the Source ends ESD protection chips and the electric light
The input connection of conversion main circuit, the electro-optic conversion enables the output end of control circuit and the input of electro-optic conversion main circuit
End connection, the output end of the electro-optic conversion main circuit is connected with the input of the optical signal transmitter, and the optical signal is sent out
The output end of emitter is connected with the four-core fiber unit of the photoelectric mixed cable, and the optical signal after electro-optic conversion passes through four core
Fiber unit is delivered to the input of the Sink end signals recovery module.
5. the DisplayPort long distance transmitters that photoelectricity according to claim 2 mixes, it is characterised in that：It is described
Sink end signals modular converter includes Sink ends DP interfaces, Sink ends DC power supply circuit, Sink ends ESD protection chips, photoelectricity
Conversion main circuit, opto-electronic conversion enable control circuit and optical signal receiver, the input of Sink ends DC power supply circuit
It is connected by the electric unit of the photoelectric mixed cable with the output end of Source ends DC power supply circuit, the Sink ends are straight
Stream power circuit is respectively the opto-electronic conversion main circuit by output end and opto-electronic conversion enables control circuit energy supply, described
ESD protection chips in Sink ends are connected with the input of the opto-electronic conversion main circuit, and the opto-electronic conversion enables control circuit
Output end is connected with the input of opto-electronic conversion main circuit, and input and the optical signal of the opto-electronic conversion main circuit are received
The output end connection of device, the output end of the opto-electronic conversion main circuit is connected with the Sink ends DP interfaces, is turned by the photoelectricity
The differential pair electric signal obtained after change owner circuit reduction is passed to down together with DP control signals by the Sink ends DP interfaces
Trip equipment is used.
6. the DisplayPort long distance transmitters that photoelectricity according to claim 4 mixes, it is characterised in that：It is described
Source end signal modular converters contain 2722 four-way laser driving chips, the 2722 four-way laser instrument drives
Chip mainly enables logical block and constitutes by programmed circuit, four electro-optic conversion amplifying circuits and four, the programmed circuit point
Be not connected with four electro-optic conversion amplifying circuits, wherein, the programmed circuit again it is main by Memory Controller and with institute
The temperature controller composition of Memory Controller connection is stated, the Memory Controller is that the distribution storage of various control parameters is empty
Between, four described enable that logical block controls respectively four electro-optic conversion amplifying circuits open enable, it is according to difference
The incoming level of signal voltage difference size, the output level of " ACT1 " and " ACT0 " is determined to enable ALT-CH alternate channel, the electricity
The differential pair electric signal of input is first converted into single-ended signal by light converter amplifier circuit, then the current difference of the single-ended signal is put
Greatly, finally by the signal output after amplification to the optical signal transmitter to be changed into the optical signal with intensity difference simultaneously
Export to the fiber unit to carry out remote transmission.
7. the DisplayPort long distance transmitters that photoelectricity according to claim 5 mixes, it is characterised in that：It is described
Sink end signal modular converters contain 2712 transimpedance amplifiers, and 2712 transimpedance amplifier is mainly believed by four inputs
Number detector unit, light signal strength detector unit, four photoelectric reduction amplifying circuits, output amplitude level controller and four are straight
Stream compensation circuit composition, the input of the photoelectric reduction amplifying circuit is connected with the output end of the optical signal receiver, institute
The input for stating input signal detection unit is connected with the output end of the optical signal receiver, the input signal detection unit
Output end be connected with the photoelectric reduction amplifying circuit, the light signal strength detector unit and the optical signal receiver
Output end connects, and the output amplitude level controller is connected respectively with four photoelectric reduction amplifying circuits, the direct current
Compensation circuit is connected with the photoelectric reduction amplifying circuit, wherein, the light signal strength detector unit flows through institute by detection
State the total current of optical signal receiver to detect the intensity of input signal, the input signal detection unit according to whether
There is signal input to control whether to open the photoelectric reduction amplifying circuit, the photoelectric reduction amplifying circuit is defeated without signal
Fashionable entrance park mode, the optical signal of input is first converted into the electricity with weak current difference via the optical signal receiver
Signal, then be amplified the current difference of input signal by the photoelectric reduction amplifying circuit, being finally reduced into can be for setting
The standby differential pair electric signal for reading, can be realized to output by carrying out register assignment to the output amplitude level controller
The amplitude of differential pair signal is set, and the DC offset circuit realizes photoelectric reduction amplifying circuit reality by negative-feedback
The differential pair amplitude of output is consistent with amplitude set in advance.
8. the DisplayPort long distance transmitters that photoelectricity according to claim 4 mixes, it is characterised in that：It is described
Optical signal transmitter includes 45 degree of fiber arrays of transmitting terminal of four vertical cavity surface emitting lasers and Unit four, described to hang down
The input of straight cavity surface-emitting laser is connected with the output end of the electro-optic conversion main circuit, 45 degree of optical fiber arrays of the transmitting terminal
The input of row is connected with the output end of the vertical cavity surface emitting laser, the output end of 45 degree of fiber arrays of the transmitting terminal
It is connected with the input of the fiber unit, the vertical cavity surface emitting laser is received and drives core by 2722 four-way laser instruments
The laser signal perpendicular to circuit board launch is transformed into after the single-ended signal of piece output, the laser signal is via the transmitting
45 degree of end fiber array is reflected into after the signal parallel with circuit board into fiber unit transmission.
9. the DisplayPort long distance transmitters that photoelectricity according to claim 5 mixes, it is characterised in that：It is described
Optical signal receiver includes 45 degree of fiber arrays of receiving terminal of four photodiodes and Unit four, 45 degree of optical fiber arrays
The input of row is connected with the output end of the fiber unit, the output end and the photodiode of 45 degree of fiber arrays
Input connection, the output end of the photodiode is connected with the input of the opto-electronic conversion main circuit, the optical fiber
The optical signal of unit output is changed into the optical signal parallel to circuit board into after 45 degree of fiber arrays of the receiving terminal, and the signal leads to
Cross the photodiode input signal being changed into after 45 degree of fiber array reflections of receiving terminal perpendicular to circuit board, the photodiode
The optical signal of input is changed into after single-ended electrical signal and is exported to 2712 transimpedance amplifiers signals revivification to be set into downstream
Standby required differential pair signal.
10. the DisplayPort remote transmission methods that a kind of photoelectricity mixes, it is characterised in that：DP signals are believed from Source ends
The input of number modular converter, is first converted to the differential pair electric signal in DP electric signals by the Source end signals modular converter
Optical signal, then, long-distance transmissions is carried out together via photoelectric mixed cable by optical signal and control electric signal, finally, is passed through
Optical signal is reduced into differential pair electric signal and is used for downstream DP remote equipments by Sink end signals recovery module.
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| CN114204367A (en) * | 2021-11-18 | 2022-03-18 | 深圳新联胜光电科技有限公司 | USB Type-C full-function switching device adopting SFP module communication |
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