CN209488726U - A kind of HDMI interface uniformity test fixture - Google Patents
A kind of HDMI interface uniformity test fixture Download PDFInfo
- Publication number
- CN209488726U CN209488726U CN201920037739.8U CN201920037739U CN209488726U CN 209488726 U CN209488726 U CN 209488726U CN 201920037739 U CN201920037739 U CN 201920037739U CN 209488726 U CN209488726 U CN 209488726U
- Authority
- CN
- China
- Prior art keywords
- contact pin
- hdmi interface
- power supply
- signal
- detection module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
A kind of HDMI interface uniformity test fixture, comprising: first detection module, the second detection module, third detection module, the 4th detection module and the 5th detection module；First detection module detects the consistency of the TMDS signal transmission passage of HDMI interface；Second detection module detects the consistency of the CEC signal transmission passage of HDMI interface；Third detection module detects the capacitance parameter of DDC signal transmission passage in HDMI interface, and the capacitance parameter of detection CEC signal transmission passage；4th detection module detects the state parameter of the driving power of HDMI interface；The hot plug performance of 5th detection module detection HDMI interface；HDMI interface uniformity test fixture in the utility model embodiment can realize the multifunctional signal of HDMI interface All-in-One, easily test, and the scope of application is extremely wide, reduces the testing cost of the consistency of HDMI interface.
Description
Technical field
The utility model belongs to detection technique field more particularly to a kind of HDMI interface uniformity test fixture.
Background technique
With the fast development of the audio & video equipments such as modern speaker/display screen, HDMI (High Definition
Multimedia Interface, high-definition multimedia interface) technology obtained universal application in audio & video equipment；
HDMI interface is not only able to play the compatible transmission function of audio signal and vision signal in audio & video equipment, and described
Special transmission channel can be arranged for different types of audio signal and vision signal in HDMI interface, so that signal is in transmission
It is preceding to be not necessarily to carry out D/A switch or analog/digital conversion, improve transmission rate of the audio signal/vision signal in HDMI interface
And efficiency of transmission, it is however generally that, the data transmission bauds of the HDMI interface is up to 2.25GB/s；When HDMI interface is applied not
In the audio & video equipment of same type, the audio & video equipment can obtain in real time the audio-video number of large capacity by HDMI interface
More complete, clearly image/data can be presented according to, audio & video equipment；Therefore it can greatly be ensured by HDMI interface
The communication compatibility of audio & video equipment.
HDMI interface needs to transmit different types of audio, video data, then HDMI interface can be realized different signal transmission
Function, the signal of each type can have the difference of transmission in HDMI interface, therefore traditional technology usually requires fixture pair
HDMI interface carries out uniformity test, to ensure the compatible transmission of signal with different type in the HDMI interface, described in raising
The safety that signal transmits in HDMI interface；However the signal transfer functions of HDMI interface are more complete, and the HDMI connects
Signal kinds in mouthful are various, and the fixture in traditional technology, which cannot achieve, examines all types signal conformance in HDMI interface
It surveys, the consistency of signals all in HDMI interface is tested comprehensively to realize, traditional technology can only build one entirely every time
New test platform, and for HDM interface redesign circuit structure to be tested on the test platform, and due to
The fixture test space of points is minimum, and this mode will generate great time cost and production cost, and will technically realize
Difficulty is larger.
Utility model content
In view of this, the utility model embodiment provides a kind of HDMI interface uniformity test fixture, it is intended to solve to pass
The problem of fixture testing cost of system is higher, poor compatibility.
The utility model embodiment provides a kind of HDMI interface uniformity test fixture, the HDMI interface consistency
Test fixture includes: pin connector and test power supply, and the pin connector is connect with the HDMI interface, and the HDMI connects
Mouth uniformity test fixture further include:
It is connected between the pin connector and the test power supply, is configured as detecting the TMDS of the HDMI interface
The first detection module of the consistency of signal transmission passage；
It is connected between the pin connector and the test power supply, is configured as detecting the CEC of the HDMI interface
Second detection module of the consistency of signal transmission passage；
It is connect with the pin connector, is configured as access DDC signal and the HDMI according to the DDC signal detection
The capacitance parameter of DDC signal transmission passage in interface, and access CEC signal and the letter of the CEC according to the CEC signal detection
The third detection module of the capacitance parameter of number transmission channel；
It is connect with the pin connector, is configured as detect the state parameter of the driving power of the HDMI interface
Four detection modules；And
It is connect with the pin connector, is configured as detecting the 5th detection mould of the hot plug performance of the HDMI interface
Block.
In one of them embodiment, the test power supply is+5V DC power supply.
In one of them embodiment, the pin connector include: it is multiple connect with the HDMI interface it is multiple
Signal input port.
In one of them embodiment, the first detection module includes:
The a plurality of TMDS signal testing link being set side by side, TMDS signal testing link described in each item are connect with the plug
Each signal input port of device connects one to one, wherein TMDS signal testing link described in each article includes: the first contact pin,
One resistance and the second contact pin, first contact pin connect a signal input port of the pin connector, first electricity
Resistance is connected between first contact pin and second contact pin；
Third contact pin, the third contact pin connect the second contact pin in the TMDS signal testing link；
4th contact pin；
First jump cap, first jump cap are mounted between the third contact pin and the 4th contact pin；And
Input terminates the test power supply, and output terminates the 4th contact pin, is configured as converting the test power supply
For the first power-switching circuit of the first DC power supply.
In one of them embodiment, in the TMDS signal testing link described in each item, the first resistor is 50 Ω；
First DC power supply is+3.3V DC power supply.
In one of them embodiment, second detection module includes: second source conversion circuit, third power supply turn
Circuit, the 5th contact pin, the 6th contact pin, the 7th contact pin, the 8th contact pin, the 9th contact pin, the tenth contact pin, the second jump cap, third is changed to jump
Cap, the forth jump cap, the fifth jump cap, second resistance, 3rd resistor and the 4th resistance；
Wherein, the first of the first end of the 5th contact pin, the first end of the 6th contact pin and the 7th contact pin
End is connected to a signal input port of the pin connector altogether, and second jump cap is mounted on the of the 5th contact pin
Between two ends and the first end of the second resistance, the second end of the second resistance is grounded, and the third jump cap is mounted on institute
It states between the second end of the 6th contact pin and the first end of the 3rd resistor, the forth jump cap is mounted on the 7th contact pin
Between second end and the first end of the 4th resistance, the second end of the 4th resistance is grounded, and the second of the 3rd resistor
The first end of the 9th contact pin is terminated, the first of the 8th contact pin terminates the output end of the second source conversion circuit,
The input of the second source conversion circuit terminates the test power supply, and the second source conversion circuit is used for the test
Power supply is converted to the second DC power supply, the output end of the first termination third power-switching circuit of the tenth contact pin, institute
The input for stating third power-switching circuit terminates the test power supply, and the third power-switching circuit is used for the test electricity
Source is converted to third DC power supply；
Wherein, the fifth jump cap be mounted on the 9th contact pin second end and the tenth contact pin second end it
Between or the fifth jump cap be mounted between the second end of the 9th contact pin and the second end of the 8th contact pin.
In one of them embodiment, second DC power supply is+3.3V DC power supply, the third DC power supply
For+3.63V DC power supply；
The second resistance is 1M Ω, and the 3rd resistor is 27K Ω, and the 4th resistance is 1K Ω.
In one of them embodiment, the third detection module includes: the 11st contact pin, the 12nd contact pin, the tenth
Three contact pins, the 6th jump cap and the 7th jump cap；
Wherein, a signal input port of the first termination pin connector of the 11st contact pin, described the
Another signal input port of the first termination pin connector of 12 contact pins；
Wherein, the 6th jump cap is mounted on the second end of the 11st contact pin and the first end of the 13rd contact pin
Between, the 7th jump cap is mounted between the second end of the 12nd contact pin and the first end of the 13rd contact pin, institute
State the second end ground connection of the 13rd contact pin.
In one of them embodiment, the 4th detection module includes: the 14th contact pin, the 15th contact pin, the 8th
Jump cap and the 5th resistance；
Wherein, a signal input port of the first termination pin connector of the 14th contact pin, described the
The first end of second termination the 15th contact pin of 14 contact pins, the 8th jump cap are mounted on the of the 15th contact pin
Between two ends and the first end of the 5th resistance, the second end of the 5th resistance is grounded.
In one of them embodiment, the 5th detection module includes: the 16th contact pin, the 9th jump cap, the tenth jump
Cap, swept resistance and for export the first DC voltage, the second DC voltage, third DC voltage, the 4th DC voltage or
The ATX power supply of the 5th DC voltage of person；
Wherein, a signal input port of the first termination pin connector of the 16th contact pin, described the
Nine jump caps are mounted on the second end of the 16th contact pin and the first end of the swept resistance, and the tenth jump cap is mounted on institute
It states between the second end of swept resistance and the ATX power supply.
Above-mentioned HDMI interface uniformity test fixture is directed to inhomogeneity in HDMI interface by multiple detection modules respectively
The signal transmission passage of type carries out uniformity test, realizes for HDMI interface All-in-One test function, the HDMI interface
Uniformity test fixture can obtain the transmission state of each type signal in the HDMI interface in real time, to obtain respective class
Whether the signal of type meets the requirement of consistency, and obtains the signal transmission shape of all signal transmission passages in HDMI interface
State, the HDMI interface uniformity test fixture in the utility model embodiment can be suitable for the survey of various types HDMI interface
Examination, compatibility is extremely strong, reduces the testing cost of HDMI interface consistency, improves the applicable universal of different type HDMI interface
Property；It cannot achieve to efficiently solve fixture in traditional technology for uniformity test multi-functional in HDMI interface, it is described
The uniformity test higher cost of HDMI interface, the not high problem of practical value.
Detailed description of the invention
It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model
Example is applied, for those skilled in the art, without creative efforts, can also be obtained according to these attached drawings
Other attached drawings.
Fig. 1 is a kind of function structure chart of HDMI interface provided by the embodiment of the utility model；
Fig. 2 is a kind of function structure chart of HDMI interface uniformity test fixture provided by the embodiment of the utility model；
Fig. 3 is a kind of circuit structure diagram of HDMI interface uniformity test fixture provided by the embodiment of the utility model.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
It needs to illustrate first, in the actual application of HDMI interface, the product using HDMI interface is entering
Require before market by uniformity test, thus the uniformity test of HDMI interface be its have in application process into
Capable step, due to the transmission complexity of signal in HDMI interface, traditional technology is cannot achieve for a variety of in HDMI interface
The uniformity test of signal transmission；Illustratively, the structure that Fig. 1 shows HDMI interface provided by the embodiment of the utility model is shown
It is intended to, as shown in Figure 1, the HDMI interface includes different types of signal transmission passage, is transmitted by the signal of respective type logical
Road can be used in transmitting different types of signal of communication, and different types of signal of communication can be realized different circuit function
Can, to realize the compatible communication function of the HDMI interface；Specifically, in HDMI interface, various types of signals of communication
Function is as follows:
TMDS (Transition Minimized Differential Signal minimizes differential signal transmission) signal
Transmission channel is transmitted by the raw information that TMDS signal transmission passage can be realized TMDS signal, is transmitted by TMDS signal
Channel can ensure the data integrity in TMDS signal, and the TMDS signal is driven in TMDS signal transmission passage with difference
Mode transmits, so that TMDS signal tends to DC balance in TMDS signal transmission passage, avoids TMDS signal for circuit
Electromagnetic interference, improve speed and reliability of the TMDS signal in transmission process；And then it can be realized by TMDS signal
Video data/audio data bi-directional improves the signal two-way communications capabilities of the HDMI interface.
Optionally, the HDMI signal includes: vision signal, audio signal and state of a control signal；Believed by video
Number can to communication equipment provide video information, by audio signal can to communication equipment provide audio-frequency information, pass through control
Status signal can make communication equipment realize stable, safe video/audio conversion function；Such as the vision signal can be used
In transmission R (Red, red), G (Green, green), B (Blue, blue) three primary colors, and the HDMI signal transmission passage
In, each colouring information can be transmitted in specific transmission line, improved the HDMI signal and believed in HDMI
Transmission quality in number transmission channel, the HDMI interface have the wider array of scope of application.
DDC (Display Data Channel shows data channel) signal, the DDC signal are used in HDMI interface
In sending configuration information and data format information to video frequency transmitter, wherein each DDC signal include it is unique physically
Location can be realized the signal transmitted in both directions between video equipment by DDC signal, improve the applicable universal of the HDMI interface
Property.
CEC (Consumer Electronics Control, consumer electronics control) signal transmission passage: believed by CEC
Number it can be realized interacting and controlling between equipment on HDMI CEC network, the CEC signal can carry large capacity
Control information；Therefore the HDMI interface can be mentioned suitable for different types of audio & video equipment by the CEC signal
The high universality and practical value of audio & video equipment.
HPD (Hot Plug Detect, hot plug inquiry control) signal transmission passage: terminal can be made by HPD signal
Equipment reads the data in the HDMI interface, to guarantee safety that a plurality of types of data are transmitted in HDMI interface and steady
Qualitative, to prevent powered-off fault event from damaging for the safety of data in HDMI interface, the HDMI interface has more
High practical value, corresponding audio & video equipment can realize complete circuit function in different external environments.
It should be noted that HDMI interface shown in Fig. 1 is only a specific embodiment, not constitute for
The technology limiting of HDMI interface in the utility model embodiment, wherein the HDMI interface in Fig. 1 is as the utility model embodiment
The application of middle HDMI interface uniformity test fixture is not changing fixture essence technical characteristic in the utility model embodiment
Basis on, those skilled in the art can it is shown in Fig. 1 go out HDMI interface module basis on improve, expand with
And extend etc., since this only designs the technical characteristic of application, the HDMI interface consistency in the utility model embodiment
Test fixture still can be applied to above-mentioned HDMI interface, therefore the compatibility that the HDMI interface uniformity test fixture is high,
Practical value is high.
The HDMI interface shown described in referring to Fig.1, since there are the different signals of communication of multichannel in HDMI interface, and
Fixture in traditional technology, which cannot achieve, carries out consistency detection for signals of communication all types of in HDMI interface, thus pole
The earth reduces the scope of application of the fixture；Based on this, the utility model embodiment provides HDMI interface uniformity test
Fixture 10 is to solve the above technical problems, specific as follows:
Fig. 2 shows the structural schematic diagram of HDMI interface uniformity test fixture 20 provided in this embodiment, the HDMI
Interface automata fixture 20 is applied in HDMI interface, and the internal structure and its working principle of the HDMI interface can refer to
The embodiment of Fig. 1, will not be described in great detail herein；The HDMI interface uniformity test fixture 20 includes: pin connector 201 and surveys
Power supply 202 is tried, wherein the HDMI interface uniformity test fixture 20 connects the HDMI interface by pin connector 201, and
The multiple types signal in HDMI interface is accessed by pin connector 201, and then the fixture 20 is according to different types of letter
Number realize for HDMI interface multiple types signal transmission passage uniformity test, which can greatly mention
The high communication compatibility of HDMI interface uniformity test fixture 20, application range are wider；Wherein test power supply 202 connects in HDMI
It is capable of providing stable electric energy in mouth uniformity test fixture 20, to maintain the work of HDMI interface uniformity test fixture 20 steady
Qualitative, HDMI interface uniformity test fixture 20 accurately detects the consistency of HDMI interface, avoids HDMI interface
Consistency detection error.
Wherein, HDMI interface uniformity test fixture 20 further include: first detection module 203, the second detection module 204,
Third detection module 205, the 4th detection module 206 and the 5th detection module 207.
The first detection module 203 is connected between pin connector 201 and test power supply 202, first detection module
The consistency of the TMDS signal transmission passage of 203 detection HDMI interface, first detection module 203 are connect by pin connector 201
Enter the TMDS signal of HDMI interface, and then the first detection module 203 is able to detect TDMS signal according to TMDS signal and transmits
The signal in channel transmits safety, and on the transmission state signal basis that HDMI interface is in safety, HDMI is connect with realizing
The consistency detection of TMDS signal transmission passage in mouthful, the efficiency of transmission of TMDS signal greatly in guarantee HDMI interface.
Second detection module 204 is connected between pin connector 201 and test power supply 202, the inspection of the second detection module 204
Survey the consistency of the CEC signal transmission passage of the HDMI interface；It can ensure that CEC signal passes by the second detection module 204
Defeated safety, so as to have higher communications security between HDMI interface and CEC equipment；The HDMI interface is powering on shape
State, off-position and standby mode can realize that CEC is communicated, and the CEC signal can be comprising corresponding in HDMI interface
The communication information, ensured the communication stability of HDMI interface.
Third detection module 205 is connect with pin connector 201, and third detection module 205 accesses DDC signal and according to institute
The capacitance parameter of DDC signal transmission passage in HDMI interface described in DDC signal detection is stated, third detection module 205 accesses CEC letter
Number and the CEC signal transmission passage according to the CEC signal detection capacitance parameter；Specifically, third detection module 205 is logical
It crosses pin connector 201 and accesses DDC signal, third detection module 205 accesses CEC signal by pin connector 201, due to
Corresponding capacitive load, therefore third detection module 205 are respectively present in DDC signal transmission passage and CEC signal transmission passage
Judge whether the capacitive load on DDC signal transmission passage has exceeded preset safe range, and third according to DDC signal
Detection module 205 judges whether the capacitive load on CEC signal transmission passage exceeds preset safe range according to CEC signal；
It can be avoided CEC signal transmission passage and DDC signal transmission passage by third detection module 205 to be done by outer signals
It disturbs, so that DDC signal and CEC signal are able to maintain the transmission state of stable safety, the signal for improving the HDMI interface is passed
Transmission quality.
4th detection module 206 is connect with pin connector 201, and the 4th detection module 206 detects the driving of HDMI interface
The state parameter of power supply；Optionally, the state parameter of the driving power includes but is not limited to: amplitude, the frequency of driving power
And phase；Wherein driving power can provide stable electric energy to HDMI interface, to ensure that stablizing for the HDMI interface is transported
Row；Therefore the present embodiment can extract the driving current in HDMI interface by the 4th detection module 206, with real-time detection HDMI
Whether the driving power in interface meets the demand of voltage rating and rated current, keeps HDMI interface stable always
Working condition, the HDMI interface have the wider array of scope of application.
5th detection module 207 is connect with pin connector 201, and the heat that the 5th detection module 207 detects HDMI interface is inserted
Performance is pulled out, the communication stability of real-time guarantees HDMI interface and extraneous audio & video equipment is capable of by the 5th detection module 207, by
In the HDMI interface have safety warm connection function, therefore HDMI interface can be realized under different external condition with outside
The security communication function (SCF) of boundary's equipment, the phenomenon that avoiding the communication data in HDMI interface from going out active；Technical staff can be not related to
It closes on the basis of extraneous power supply of audio & video equipment, physical connection will be carried out between HDMI interface and extraneous audio & video equipment；
To which the HDMI interface uniformity test fixture 20 in the present embodiment can greatly ensure the communication stability of HDMI interface, mention
The high physical security performance of the HDMI interface.
It is shown in Fig. 2 go out HDMI interface uniformity test fixture 20 modular structure in, can be to by test power supply 202
Detection module provides stable DC energy, to ensure the consistency detection safety in HDMI interface uniformity test fixture 20
Energy；Meanwhile each of HDMI interface uniformity test fixture 20 detection module (includes: first detection module 203, second
Detection module 204, third detection module 205, the 4th detection module 206 and the 5th detection module 207) for HDMI interface energy
It enough realizes different Function detections, to detect the consistency of signal with different type transmission channel in HDMI interface, ensures HDMI
The communications security of interface；To which the HDMI interface uniformity test fixture 20 in the present embodiment can be realized for HDMI interface
In the test of multi-functional signal conformance, compatibility is extremely strong, and consistency detection precision is higher；Pass through the HDMI interface consistency
Test fixture 20 can be widely used in different types of HDMI interface, be realized for signal of communication in HDMI interface
Convenient, All-in-One test, has ensured the communications security in HDMI interface, has reduced the HDMI interface uniformity test fixture
20 for HDMI interface consistency detection cost, HDMI interface uniformity test fixture 20 have the wider scope of application,
Practical value is higher；Efficiently solving traditional technology cannot achieve the multifunctional signal transmission channel progress of HDMI interface unanimously
Property test, the higher cost of the consistency detection of HDMI interface, compatibility it is lower, it is difficult to blanket problem.
As an alternative embodiment, testing power supply 202 as+5V DC power supply, and then the test in the present embodiment
Power supply 202 can provide stable electric energy to the detection module in HDMI interface uniformity test fixture 20, so that HDMI interface
Different detection modules can be in stable working condition always in uniformity test fixture 20, ensure the HDMI interface
Uniformity test fixture 20 for multifunctional signal transmission channel in HDMI interface consistency detection stability, in the present embodiment
HDMI interface uniformity test fixture 20 have the wider array of scope of application.
As an alternative embodiment, Fig. 3 shows HDMI interface consistency provided by the embodiment of the utility model
The particular circuit configurations of test fixture 20, as shown in figure 3, pin connector 201 include: it is multiple connect with HDMI interface it is multiple
Signal input port；Wherein, each signal input port of HDMI interface uniformity test fixture 20 can access HDMI interface
The signal of communication of middle respective type, and then HDMI interface uniformity test fixture 20 is able to detect corresponding letter according to signal of communication
The consistency of number transmission channel；HDMI interface uniformity test fixture 20 in the present embodiment passes through multiple signal input port energy
All types of signals of communication in HDMI interface are accessed, enough to realize that the All-in-One for signals of communication a variety of in HDMI interface is surveyed
Function is tried, the compatibility performance of HDMI interface uniformity test fixture 20, the HDMI interface uniformity test fixture 20 are improved
Each of detection module can realize for the detection of respective communication signal in HDMI interface, greatly ensured HDMI
The detection security performance of interface automata fixture 20, the HDMI interface uniformity test fixture 20 in the present embodiment have more
The wide scope of application.
As an alternative embodiment, as shown in figure 3, the first detection module 203 includes: a plurality of is set side by side
TMDS signal testing link 2031, third contact pin t3, the 4th contact pin t4, the first jump cap J1 and the first power-switching circuit
V1。
Wherein, each signal input port one of TMDS signal testing link 2031 and pin connector 201 described in each item
One is correspondingly connected with, and TMDS signal all the way is had access to by the TMDS signal testing link 2031, so that first detection module 203
It can be realized communication compatibility between HDMI interface；Specifically, each TMDS signal testing link include: the first contact pin t1,
First resistor R1 and the second contact pin t2, the first contact pin t1 patch a signal input port of head connector 201, first resistor
R1 is connected between the first contact pin t1 and the second contact pin t2；It can guarantee TMDS signal in transmission process by first resistor R1
Stability ensure first inspection so that the TMDS signal that first detection module 203 is accessed is at stable state
Survey the physical security of module 203.
The quantity of the TMDS signal testing link 2031 of first detection module 203 can be according to HDMI interface in the present embodiment
Type be adjusted so that the first detection module 203 can completely, accurately access TMDS signal, and according to described
The consistency of TMDS signal detection TMDS signal transmission passage, that is, ensured the consistency detection of the first detection module 203
Precision, and make the circuit structure of the first detection module 203 in the present embodiment that there is higher compatibility and scalability.
Illustratively, the first detection module 203 in the present embodiment includes 8 TMDS signal testing links being set side by side
2031。
Wherein, third contact pin t3 meets the second contact pin t2 in TMDS signal testing link 2031, passes through third contact pin t3 energy
Enough access the TMDS signal in TMDS signal testing link 2031；First jump cap J1 is mounted on third contact pin t3 and the 4th contact pin t4
Between；The input termination test power supply 202 of first power-switching circuit V1, the output termination the 4th of the first power-switching circuit V1
Contact pin t4, the first power-switching circuit V1 are converted to the first DC power supply for power supply 202 is tested.
Optionally, the power-switching circuit in traditional technology can be used to realize in the first power-switching circuit V1, right
This is without limitation.
Optionally, in each TMDS signal testing link 2031, first resistor R1 is 50 Ω；First DC power supply be+
3.3V DC power supply；It can be realized the function of voltage conversion by the first power-switching circuit V1, so that the first power supply conversion electricity
First DC power supply of road V1 output can make first detection module 203 be in the working condition of stable safety, ensure HDMI
Consistency detection stability of the interface automata fixture 20 for HDMI interface.
First detection module 203 in the present embodiment can be connected to the first power-switching circuit by the first jump cap J1
V1, so that the voltage of the first resistor R1 is pulled to the first DC power supply, so that for the consistent of TMDS signal transmission passage
Quick, the convenient test of property；And the first jump cap J1 can ensure stability of the TMDS signal in transmission process；And institute
State first detection module 203 realizes the compatible transmission function of TMDS signal by the way of jumper connection；To in the present embodiment
First detection module 203 has more simplified circuit structure, and the scalability of circuit is extremely strong, improves in HDMI interface
The consistency detection precision of TMDS signal transmission passage, so that HDMI interface uniformity test fixture 20 has more in the present embodiment
Low manufacturing cost and application cost, the usage experience of user are higher.
As an alternative embodiment, as shown in figure 3, second detection module 204 includes: second source conversion
Circuit V2, third power-switching circuit V3, the 5th contact pin t5, the 6th contact pin t6, the 7th contact pin t7, the 8th contact pin t8, the 9th insert
Needle t9, the tenth contact pin t10, the second jump cap J2, third jump cap J3, the forth jump cap J4, the fifth jump cap J5, second resistance R2, third
Resistance R3 and the 4th resistance R4.
Wherein, the first end, the first end of the 6th contact pin t6 and the first end of the 7th contact pin t7 of the 5th contact pin t5 connects altogether
In a signal input port of pin connector 201, and then the 5th contact pin t5, the 6th contact pin t6 and the 7th contact pin t7 can
The CEC signal of HDMI interface is accessed, and the uniformity test for CEC signal transmission passage is realized according to the CEC signal；The
Two jump cap J2 are mounted between the second end of the 5th contact pin t5 and the first end of second resistance R2, the second end of second resistance R2
It is grounded GND, third jump cap J3 is mounted between the second end of the 6th contact pin t6 and the first end of 3rd resistor R3, the forth jump cap J4
It being mounted between the second end of the 7th contact pin t7 and the first end of the 4th resistance R4, the second end of the 4th resistance R4 is grounded GND, the
The output end of the first termination second source conversion circuit V2 of eight contact pin t8, the input termination test of second source conversion circuit V2
Power supply 202, second source conversion circuit V2 are converted to the second DC power supply, the first end of the tenth contact pin t10 for power supply 202 is tested
Connect the output end of third power-switching circuit V3, the input termination test power supply 202 of third power-switching circuit V3, third power supply
Conversion circuit V3 is converted to third DC power supply for that will test power supply 202.
Wherein, the fifth jump cap J5 install to the 9th contact pin t9 second end and the tenth contact pin t10 second
Between end or the fifth jump cap J5 is mounted on the second end of the 9th contact pin t9 and the second end of the 8th contact pin t8
Between.
As an alternative embodiment, the second source conversion circuit V2 and third power-switching circuit V3
The circuit structure in traditional technology can be used all to realize, this is limited herein；Second detection module 204 can will be tested
Power supply 202 is converted to the second DC power supply or third DC power supply, passes through second DC power supply and third DC power supply energy
The job stability for enough ensureing second detection module 204 improves the compatibility of the second detection module 204 in the present embodiment
And universality.
As an alternative embodiment, second DC power supply is+3.3V DC power supply, the third direct current
Source is+3.63V DC power supply；The second resistance is 1M Ω, and the 3rd resistor is 27K Ω, and the 4th resistance is 1K Ω.
Therefore in the particular circuit configurations of the second detection module 204 shown by the present embodiment, pass through the fifth jump cap J5
It can be realized the communication interconnection between different resistance and different DC power supplies, so that the second detection module 204 can be to inhomogeneity
The consistency of the CEC signal transmission passage of the HDMI interface of type is accurately detected；For example, the fifth jump cap J5 it is mountable
Between the second end of 9th contact pin t9 and the second end of the tenth contact pin t10, for another example described the fifth jump cap J5 it is mountable
It is similar between the second end of the 9th contact pin t9 and the second end of the 8th contact pin t8；Second in the present embodiment
Detection module 204 has more flexible circuit structure, and scalability is stronger, and second detection module 204 is according to inhomogeneity
The HDMI interface realization of type accurately detects the consistency of CEC signal transmission passage, so that the HDMI interface in the present embodiment
Uniformity test fixture 20 has the wider array of scope of application, and HDMI interface can greatly ensure the safety of CEC signal transmission,
HDMI interface uniformity test fixture in the present embodiment be capable of universality be applied to different industrial circles in.
As an alternative embodiment, as shown in figure 3, the third detection module 205 includes: the 11st contact pin
T11, the 12nd contact pin t12, the 13rd contact pin t13, the 6th jump cap J6 and the 7th jump cap J7.
Wherein, a signal input port of the first termination plug connector 201 of the 11st contact pin t11, the 12nd inserts
Another signal input port of the first termination plug connector 201 of needle t12；And then the third detection module in the present embodiment
205 can be respectively connected to the DDC signal and CEC signal, and then the third in the present embodiment by two signal input ports
Detection module 205 can be realized to transmit DDC signal transmission passage and CEC signal according to DDC signal and CEC signal simultaneously to be led to
The accurate detection of the capacitance parameter in road；Illustratively, the 11st contact pin t11 passes through a signal of pin connector 201
Input port accesses DDC signal, and the 12nd contact pin t12 is connect by another signal input port of pin connector 201
Enter CEC signal, therefore the communication compatibility with higher of third detection module 305 in the present embodiment.
Wherein, the 6th jump cap J6 be mounted on the 11st contact pin t11 second end and the 13rd contact pin t13 first end it
Between, the 7th jump cap J7 is mounted between the second end of the 12nd contact pin t12 and the first end of the 13rd contact pin t13, and the 13rd inserts
The second end of needle t13 is grounded GND；DDC signal and CEC signal can be accessed simultaneously by the 13rd contact pin t13, and realize for
The accurate detection function of capacitance parameter in signal transmission passage, so that DDC signal transmission passage and CEC signal in HDMI interface
Transmission channel have safety current/voltage, the third detection module 105 can be improved the DDC signal transmission passage and
The consistency that signal transmits in CEC transmission channel.
Third detection module 205 in the present embodiment has more simplified circuit structure, can connect from HDMI interface
Entering DDC signal and CEC signal, compatibility is extremely strong, and it is easy to operate, DDC can be detected by third detection module 205 in time
The abnormal signal transmission state of signal transmission passage and CEC signal transmission passage, it is right to greatly improve third detection module 205
In the capacitance parameter detectability of signal transmission passage, the communication security performance of the HDMI interface has been ensured；Therefore this implementation
HDMI interface uniformity test fixture 20 in example has the function of the consistency detection of more complete, complicated HDMI interface.
As an alternative embodiment, as shown in figure 3, the 4th detection module 206 includes: the 14th contact pin
T14, the 15th contact pin t15, the 8th jump cap J8 and the 5th resistance R5；Wherein, the first termination plug of the 14th contact pin t14 connects
A signal input port of device 201 is connect, the first end of the second the 15th contact pin t15 of termination of the 14th contact pin t14, the 8th jumps
Cap J8 is mounted between the second end of the 15th contact pin t15 and the first end of the 5th resistance R5, the second termination of the 5th resistance R5
Ground GND.
As an alternative embodiment, the 5th resistance R5 is 91 Ω；Those skilled in the art can basis simultaneously
In HDMI interface the amplitude of driving power sets the amplitude of the 5th resistance R5, to realize the driving power for HDMI interface
The accurate test of state parameter.
In the particular circuit configurations of 4th detection module 206 out shown in Fig. 3, the 5th resistance R5 passes through pin connector
201 signal input port has access to the direct current energy in driving power, is ensureing the HDMI interface consistency survey
It tries to realize the peace for the operating status of driving power in HDMI interface in fixture 10 on the basis of electronic component safety
Full inspection is surveyed；Illustratively, if the driving power is+5V DC power supply, the 5th resistance R5 is 91 Ω, and the 5th resistance R5 is logical
The electric current for crossing signal input port access 55mA, can accurately judge HDMI according to the electric current of the 55mA on the 5th resistance R5
Whether the driving current in interface meets safety standard, so that the 4th detection module 206 in the present embodiment greatly improves
The physical security performance of HDMI interface, the HDMI interface uniformity test fixture 20 have the wider scope of application.
As an alternative embodiment, as shown in figure 3, the 5th detection module 207 includes: the 16th contact pin t16,
Nine jump cap J9, the tenth jump cap J10, swept resistance R6 and for export the first DC voltage, the second DC voltage, third direct current
The ATX power supply V4 of voltage, the 4th DC voltage or the 5th DC voltage.
Wherein, a signal input port of the first termination plug connector 201 of the 16th contact pin t16, and then the 5th
Detection module 207 passes through realization between pin connector 201 and HDMI interface and communicates interconnection, and the 9th jump cap J9 is mounted on the 16th
The second end of contact pin t16 and the first end of swept resistance R6, the tenth jump cap J10 are mounted on the second end and ATX of swept resistance R6
Between power supply V4.
As an alternative embodiment, first DC voltage is+5.3V DC voltage, the second DC voltage is
+ 2.4V DC voltage, third DC voltage are+0.4V DC voltage, and the 4th DC voltage is+3.63V DC voltage, and the 5th is straight
Galvanic electricity pressure is 3.3V DC voltage.
It should be noted that the ATX power supply is that exchange turns direct current and regulated power supply, the ATX power supply in this field
The voltage of various amplitudes is not only exported, so that different electronic components is in safe and stable working condition, and it has
Stable electric energy can be transmitted to electronic component by the ATX power supply, so that at the electronic component by the effect of pressure stabilizing
In safe and stable working condition；Therefore the ATX power supply is widely used in computer etc. by those skilled in the art
In the electric energy supply of all kinds of electronic components.
In the present embodiment, the transmission port of the HPD signal of HDMI interface can be accessed not by the 5th detection module 207
With the voltage of amplitude, to realize the detection for HDMI interface hot plug performance, the data transmission of the HDMI interface has been ensured
Safety；Specifically, since the 5th detection module 207 includes swept resistance R6, when the resistance value of swept resistance R6 itself changes
When change, the voltage of the ATX power supply V4 output can be in the first DC voltage, the second DC voltage, third DC voltage, the 4th
Switch between DC voltage and the 5th DC voltage, so that the 5th detection module 207 is at specified work shape
State can detect the hot plug performance of HDMI interface by the 5th detection module 207 in time；For example pass through the 5th detection module
207 are capable of detecting when whether the HDMI interface has normal warm connection function；Therefore the present embodiment is by adjusting sliding electricity
The resistance value of resistance R6 can be improved the hot plug detection accuracy for HDMI interface, and then the HDMI interface consistency in the present embodiment
Test fixture 20 has more comprehensive detection function for HDMI interface, has ensured the practical value of the HDMI interface.
In conclusion the HDMI interface uniformity test fixture 10 in the utility model has flexible circuit module knot
Structure can realize the consistency of signal transmission passage different types of in HDMI interface All-in-One test, improve described
HDMI interface uniformity test fixture 10 reduces HDMI interface for the consistency detection precision of HDMI interface multifunctional signal
The testing cost of middle multifunctional signal transmission channel consistency；HDMI interface uniformity test fixture 10 in the utility model has
There is extremely strong compatibility, can be widely applicable in the consistency detection of different type HDMI interface, greatly improves described
The communication security and communication stability of HDMI interface；When the HDMI interface by consistency detection and is applied in audio & video equipment
When middle, the audio/video quality of the audio & video equipment can be greatly improved；To the HDMI interface one in the utility model
Cause property test fixture 10 has the function of the development of HDMI technology positive, will generate important industrial production value.
Various embodiments are described to various devices, circuit, device, system and or method herein.It elaborates very much
Specific details is to provide general construction, the function, system of the embodiment that the sum as described in the description is shown in the accompanying drawings
The thorough understanding made and used.However it will be understood by those skilled in the art that embodiment can be in not such certain detail
It is carried out in the case where section.In other examples, well known operation, component and element is described in detail, in order to avoid make in specification
In embodiment indigestion.It will be understood by those skilled in the art that being unrestricted in the embodiment with shown in herein
Property example, and therefore it can be appreciated that, can be in specific structure and function details disclosed herein representative and and different
The range of definite limitation embodiment.
Throughout the specification to " various embodiments ", " in embodiments ", " embodiment " or " embodiment party
The reference of formula " etc., which is meant, is included at least one embodiment about a particular feature, structure, or characteristic described in embodiment
In.Therefore, phrase " in various embodiments ", " in some embodiments ", " in one embodiment " or " implementing
In mode " etc. the appearance in appropriate place throughout the specification be not necessarily all referring to same embodiment.In addition, specific spy
Sign, structure or characteristic can combine in any suitable manner in one or more embodiments.Implement accordingly, with respect to one
The a particular feature, structure, or characteristic that mode shows or describes can entirely or partly with one or more of the other embodiment spy
Sign, structure or characteristic are combined, without assuming that such combination is not illogical or non-functional limitation.Any side
To with reference to (for example, add, subtract, top, lower part, upwards, downwards, the left side, the right, to the left, to the right, top, bottom ...
On ... under, it is vertical, horizontal, clockwise and anticlockwise) purpose to be for identification to help reader to understand present disclosure,
And limitation is not generated, especially with regard to the position of embodiment, orientation or use.
Although describing certain embodiments above with some the level of detail, those of skill in the art can be to institute
Disclosed embodiment makes many changes without departing from the scope of the present disclosure.Connection is with reference to (for example, attachment, coupling, connection
Deng) should be widely interpreted, and may include the intermediate member between the connection of element and relative motion between elements.Cause
This, connection reference does not necessarily imply that two elements are directly connected to/couple and are in fixed relationship each other." such as " entire
Use in specification should be widely interpreted and for providing the non-limitative example of embodiment of the present disclosure, and the disclosure
It is not limited to such example.Being intended that all affairs for including in the foregoing description or be shown in the accompanying drawings should be interpreted only
It is illustrative rather than restrictive.The variation in details or structure can be made without departing from the disclosure.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (10)
1. a kind of HDMI interface uniformity test fixture, which is characterized in that the HDMI interface uniformity test fixture includes: slotting
Head connector and test power supply, the pin connector are connect with the HDMI interface, the HDMI interface uniformity test folder
Tool further include:
It is connected between the pin connector and the test power supply, is configured as detecting the TMDS signal of the HDMI interface
The first detection module of the consistency of transmission channel；
It is connected between the pin connector and the test power supply, is configured as detecting the CEC signal of the HDMI interface
Second detection module of the consistency of transmission channel；
It is connect with the pin connector, is configured as access DDC signal and the HDMI interface according to the DDC signal detection
The capacitance parameter of middle DDC signal transmission passage, and access CEC signal and the biography of the CEC signal according to the CEC signal detection
The third detection module of the capacitance parameter in defeated channel；
It is connect with the pin connector, is configured as detecting the 4th inspection of the state parameter of the driving power of the HDMI interface
Survey module；And
It is connect with the pin connector, is configured as detecting the 5th detection module of the hot plug performance of the HDMI interface.
2. HDMI interface uniformity test fixture according to claim 1, which is characterized in that the test power supply is+5V
DC power supply.
3. HDMI interface uniformity test fixture according to claim 1, which is characterized in that the pin connector packet
It includes: multiple multiple signal input ports being connect with the HDMI interface.
4. HDMI interface uniformity test fixture according to claim 3, which is characterized in that the first detection module packet
It includes:
The a plurality of TMDS signal testing link being set side by side, TMDS signal testing link and the pin connector described in each item
Each signal input port connects one to one, wherein TMDS signal testing link described in each item includes: the first contact pin, the first electricity
Resistance and the second contact pin, first contact pin connect a signal input port of the pin connector, and the first resistor connects
It connects between first contact pin and second contact pin；
Third contact pin, the third contact pin connect the second contact pin in the TMDS signal testing link；
4th contact pin；
First jump cap, first jump cap are mounted between the third contact pin and the 4th contact pin；And
Input terminates the test power supply, and output terminates the 4th contact pin, is configured as being converted to the test power supply the
First power-switching circuit of one DC power supply.
5. HDMI interface uniformity test fixture according to claim 4, which is characterized in that the TMDS signal described in each item
It tests in link, the first resistor is 50 Ω；
First DC power supply is+3.3V DC power supply.
6. HDMI interface uniformity test fixture according to claim 3, which is characterized in that the second detection module packet
It includes: second source conversion circuit, third power-switching circuit, the 5th contact pin, the 6th contact pin, the 7th contact pin, the 8th contact pin, the 9th
Contact pin, the tenth contact pin, the second jump cap, third jump cap, the forth jump cap, the fifth jump cap, second resistance, 3rd resistor and the 4th electricity
Resistance；
Wherein, the first end of the first end of the 5th contact pin, the first end of the 6th contact pin and the 7th contact pin is total
It is connected to a signal input port of the pin connector, second jump cap is mounted on the second end of the 5th contact pin
Between the first end of the second resistance, the second end of the second resistance is grounded, and the third jump cap is mounted on described the
Between the second end of six contact pins and the first end of the 3rd resistor, the forth jump cap is mounted on the second of the 7th contact pin
Between end and the first end of the 4th resistance, the second end of the 4th resistance is grounded, the second termination of the 3rd resistor
The first end of 9th contact pin, the output end of the first termination second source conversion circuit of the 8th contact pin are described
The input of second source conversion circuit terminates the test power supply, and the second source conversion circuit is used for the test power supply
Be converted to the second DC power supply, the output end of the first termination third power-switching circuit of the tenth contact pin, described the
The input of three power-switching circuits terminates the test power supply, and the third power-switching circuit is used to turn the test power supply
It is changed to third DC power supply；
Wherein, the fifth jump cap is mounted between the second end of the 9th contact pin and the second end of the tenth contact pin, or
The fifth jump cap described in person is mounted between the second end of the 9th contact pin and the second end of the 8th contact pin.
7. HDMI interface uniformity test fixture according to claim 6, which is characterized in that second DC power supply is
+ 3.3V DC power supply, the third DC power supply are+3.63V DC power supply；
The second resistance is 1M Ω, and the 3rd resistor is 27K Ω, and the 4th resistance is 1K Ω.
8. HDMI interface uniformity test fixture according to claim 3, which is characterized in that the third detection module packet
It includes: the 11st contact pin, the 12nd contact pin, the 13rd contact pin, the 6th jump cap and the 7th jump cap；
Wherein, a signal input port of the first termination pin connector of the 11st contact pin, the described 12nd
Another signal input port of the first termination pin connector of contact pin；
Wherein, the 6th jump cap be mounted on the 11st contact pin second end and the 13rd contact pin first end it
Between, the 7th jump cap is mounted between the second end of the 12nd contact pin and the first end of the 13rd contact pin, described
The second end of 13rd contact pin is grounded.
9. HDMI interface uniformity test fixture according to claim 3, which is characterized in that the 4th detection module packet
It includes: the 14th contact pin, the 15th contact pin, the 8th jump cap and the 5th resistance；
Wherein, a signal input port of the first termination pin connector of the 14th contact pin, the described 14th
The first end of second termination the 15th contact pin of contact pin, the 8th jump cap are mounted on the second end of the 15th contact pin
Between the first end of the 5th resistance, the second end of the 5th resistance is grounded.
10. HDMI interface uniformity test fixture according to claim 3, which is characterized in that the 5th detection module
Include: the 16th contact pin, the 9th jump cap, the tenth jump cap, swept resistance and for export the first DC voltage, the second direct current
The ATX power supply of pressure, third DC voltage, the 4th DC voltage or the 5th DC voltage；
Wherein, a signal input port of the first termination pin connector of the 16th contact pin, the described 9th jumps
Cap is mounted on the second end of the 16th contact pin and the first end of the swept resistance, and the tenth jump cap is mounted on the cunning
Between the second end and the ATX power supply of dynamic resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920037739.8U CN209488726U (en) | 2019-01-08 | 2019-01-08 | A kind of HDMI interface uniformity test fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920037739.8U CN209488726U (en) | 2019-01-08 | 2019-01-08 | A kind of HDMI interface uniformity test fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209488726U true CN209488726U (en) | 2019-10-11 |
Family
ID=68130534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920037739.8U Active CN209488726U (en) | 2019-01-08 | 2019-01-08 | A kind of HDMI interface uniformity test fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209488726U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113253017A (en) * | 2021-04-16 | 2021-08-13 | 广州朗国电子科技有限公司 | Electrical performance test module of HDMI port |
-
2019
- 2019-01-08 CN CN201920037739.8U patent/CN209488726U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113253017A (en) * | 2021-04-16 | 2021-08-13 | 广州朗国电子科技有限公司 | Electrical performance test module of HDMI port |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10216675B2 (en) | Techniques for establishing an external interface and a network interface within a connector | |
| CN105141877B (en) | A kind of chromacoder based on programming device | |
| CN107544934A (en) | The two-way signaling regulation chip and USB Type C cables of a kind of USB Type C cables | |
| CN201319606Y (en) | Testing treatment tool | |
| CN101349984A (en) | Device for testing video graphics interface | |
| CN106713803A (en) | Multimedia communication apparatus and control method for multimedia data transmission over standard cable | |
| CN209488726U (en) | A kind of HDMI interface uniformity test fixture | |
| CN101872332B (en) | Network interface and serial port communication switching device and liquid crystal television debugging system | |
| CN204539303U (en) | HDMI (High Definition Multimedia Interface) with multiplexing function and television set | |
| CN202872142U (en) | Multifunctional USB (Universal Serial Bus) data line | |
| CN100543692C (en) | Apparatus for testing interface of video figure of computer | |
| US20170093095A1 (en) | Transmission line for electronic apparatus | |
| CN104422839B (en) | POE functional test circuit and instrument | |
| CN209514606U (en) | Novel hot plug display control system and computer equipment | |
| CN107506322A (en) | Realize Type C adapters, the passage control method of USB device detection | |
| CN204926764U (en) | Display screen body power supply protection device | |
| CN209488670U (en) | A kind of audio-video control system | |
| CN204441665U (en) | Conversion electrical connector | |
| CN209460604U (en) | The electrostatic protection control circuit and master & slave control system of master & slave control system | |
| CN206835277U (en) | A kind of DVI signals single-core fiber transmitter | |
| CN106383797A (en) | Equipment for identifying and controlling normal insertion and inverse insertion | |
| CN207164746U (en) | A kind of USB Type C adapters for realizing USB device detection | |
| CN206922930U (en) | A kind of video interface device and system | |
| CN104155483A (en) | Universal test interface device | |
| CN204462951U (en) | The integrated display of built-in prolongation receiver function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201217 Address after: 102209 local, 3rd and 4th floors, building B, No.5, lutuan Road, future science city, Changping District, Beijing Patentee after: CLP Great Wall SHENGFEI Information System Co.,Ltd. Address before: 518000 Great Wall computer building, science and Technology Park, Nanshan District, Shenzhen City, Guangdong Province Patentee before: China Great Wall Technology Group Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211125 Address after: 518000 Great Wall computer building, science and Technology Park, Nanshan District, Shenzhen City, Guangdong Province Patentee after: CHINA GREAT WALL TECHNOLOGY GROUP Co.,Ltd. Address before: 102209 local, 3rd and 4th floors, building B, No.5, lutuan Road, future science city, Changping District, Beijing Patentee before: CLP Great Wall SHENGFEI Information System Co.,Ltd. |
|
| TR01 | Transfer of patent right |