CN104469351B - A kind of method of LVDS vision signals caused by detection video source - Google Patents
A kind of method of LVDS vision signals caused by detection video source Download PDFInfo
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Abstract
The invention belongs to the display field of liquid crystal module and testing field, and in particular to a kind of method for detecting LVDS vision signals caused by video source.It comprises the following steps：Step 1, the electrical characteristic of LVDS vision signals is detected, exports the electric testing results of LVDS；Step 2, LVDS vision signals are converted into rgb video signal；Step 3, if the electric testing results of LVDS are that LVDS video signal qualities are up to standard, every frame RGB data in rgb video signal is then first cached, the every frame RGB data cached is then subjected to contrasting detection, output image Data Detection result with raw image data successively.The present invention can detect to single LINK caused by video source, double LINK, four LINK LVDS vision signals, it is simple to operate, economical and practical, not only integrated level is high, reliable operation, strong antijamming capability, and the detection reliability and efficiency of LVDS liquid crystal modules can also be lifted, reduce its equipment cost and production cost.
Description
Technical field
The invention belongs to the display field of liquid crystal module and testing field, and in particular to caused by one kind detection video source
The method of LVDS vision signals.
Background technology
The liquid of liquid crystal display die set (Liquid Crystal Display Module, hereinafter referred to as module) and its correlation
The use of crystal display device (hereinafter referred to as equipment) is very universal, as well as LVDS (Low-Voltage
Differential Signaling, Low Voltage Differential Signal) signal stabilization is reliable, passes that speed is high, power consumption is relatively low, many modules and
Equipment is all by using the signal as the display interface for receiving video image.
Produced in module and its equipment, debugged, videograph process when need to turn by video signal source or video
Fishplate bar (abbreviation video source below) produces LVDS vision signals and provides the source of module displays signal to it, thereby, it is ensured that video
Vision signal correctness and reliability caused by source are to ensure the premise of module displays.
At present, in the market for video source domain there is no unified standard ensure output LVDS vision signals correctness,
Reliability, the detection of picture signal to video source output identified one by one by human eye to shown image pixel, manually
Figure is cut persistently to judge.This detection mode operating personnel not only easily judge by accident, are difficult localized reason institute when there is display problem
；And by eye recognition easily by the subjective impact of people, for operating personnel for a long time against image, eyes are easily tired, this
Testing result can all be impacted a bit；Test platform need to be built again when changing module, so as to cause efficiency low, operation
It is cumbersome.
Therefore need a kind of technical scheme can it is reliable, errorless, efficiently LVDS picture signals caused by video source are carried out
Detection, judge without artificial.
The content of the invention
The purpose of the present invention is exactly insufficient existing for above-mentioned background technology in order to solve, there is provided one kind detection video source produces
LVDS vision signals method, its have reliability it is high, without erroneous judgement, it is simple to operate, detection efficiency is high, cost is low the characteristics of.
The technical solution adopted by the present invention is：A kind of method of LVDS vision signals caused by detection video source, including with
Lower step：
Step 1, control signal is electrically detected according to LVDS to sample the electrical characteristic of LVDS vision signals, obtain
The electric parameter of LVDS vision signals carries out contrasting detection with LVDS electric parameters benchmark, if the electric parameter of LVDS vision signals
In the range of LVDS electric parameter benchmark, then LVDS is electrically detected up to standard, and otherwise electrically detection is not up to standard by LVDS, and stopping should
The detection of LVDS vision signals；
Step 2, if LVDS electrically detects up to standard, LVDS vision signals are converted into rgb video signal；
Step 3, if LVDS electrically detect it is up to standard, production view data detection control signal, start cache the RGB successively
Every frame RGB data in vision signal；Produce original image and read control signal, start to cache raw image data, Ran Hougen
The every frame RGB data cached is entered with the raw image data successively according to original image horizontal resolution, vertical resolution
Row contrasting detection, output image Data Detection result, the object of the detection include each pixel size and pixel of RGB data
Position.
Further, in the step 1 before being sampled to the electrical characteristic of LVDS vision signals, first according to LVDS
The characteristic of vision signal, receive LVDS electric parameters benchmark, LVDS transmission match parameter, LVDS and reconcile parameter and video decoding ginseng
Number；Receive raw image data；Original image horizontal resolution, vertical resolution are set；Output LVDS transmission match parameter,
LVDS electric parameters benchmark, LVDS demodulation parameters, video decoding parametric, produce the LVDS and electrically detect control signal.
Further, in the step 1 before being sampled to the electrical characteristic of LVDS vision signals, first according to LVDS
Operation is terminated to LVDS vision signals caused by video source in transmission match parameter, then to the LVDS videos after terminated operation
Signal carries out shaping enhanced processing and obtains optimal LVDS vision signals.
Further, the LVDS vision signals sampled to its electrical characteristic are after operation processing is terminated
LVDS vision signals；The LVDS vision signals for being converted into rgb video signal are the LVDS after progress shaping enhanced processing
Vision signal；The terminated operation includes the matching of LVDS signal impedances, the configuration of LVDS signal equalizations, compensates because long range transmits institute
Caused signal distortion, decay, it is ensured that LVDS signal qualitys.
Further, LVDS vision signals are converted into the process of rgb video signal in the step 2 to be included：According to
LVDS demodulation parameters are demodulated to LVDS vision signals, adjust reception line sequence processing, by the serial code of LVDS vision signals
Data are demodulated to parallel data；Then the parallel data of LVDS vision signals is decoded according to video decoding parametric, converted
For rgb video signal.
Further, cached successively per frame RGB data and by the every frame RGB data cached successively in the step 3
The process of contrasting detection is carried out with the raw image data to be included：First cache n-th frame RGB data, n-th frame RGB data caching
After the completion of, continue to cache the (n+1)th frame RGB data；While the (n+1)th frame RGB data is cached, by n-th frame RGB data and caching
Good raw image data carries out contrasting detection, and after the completion of the detection of n-th frame RGB data, the (n+1)th frame RGB data has cached；Now
Continue to detect the (n+1)th frame RGB data, cache the n-th+2 frame RGB data；Examined successively by the transmission sequence of RGB data afterwards
Survey, until current LVDS video signal detections are completed, wherein n is positive integer.
Further, before every frame RGB data is detected with raw image data, RGB is first successively read respectively
The each row of data of data and each row of data of raw image data, by the often row RGB data read and every row original image number
According to operation is synchronized, make its synchronism output.
Further, after the completion of the current LVDS video signal detections, all RGB datas cached before are removed,
Cache the rgb video signal that the LVDS vision signals of lower piece image are converted again again afterwards.
The beneficial effects of the present invention are：
The present invention can detect to single LINK caused by video source, double LINK, four LINK LVDS vision signals, this hair
It is bright by set, can well adapt in different LVDS transmission characteristics, the color range of vision signal, transmission means, coded system
Deng different qualities.
The present invention can detect to the electrical characteristic of LVDS vision signals caused by video source, electric by inputting LVDS
Parameter and standard, obtain testing result and output display by comparison in the present invention.
The present invention can detect to the view data of LVDS vision signals caused by video source, by caching every two field picture in advance
Data simultaneously contrast with raw video image, so as to judge whether each pixel exports correctly, can be detected per two field picture.
The present invention can detect to highest LVDS video resolutions, and not only integrated level is high, reliable operation, antijamming capability
By force, it is and simple to operate, economical and practical, the detection reliability and efficiency of LVDS liquid crystal modules can not only be lifted, reduces its equipment
Cost and production cost, it also will further improve the popularization of related display device.
The present invention can be by using FPGA (FPGA) chip, DDR (Double DateRate Double Datas
Speed) storage chip, A/D (analog/digital) conversion chips realize the repertoire；Above-mentioned device is the common core in market
Piece, not only working stability, realization are easy and cheap for they, avoid and are set caused by using various special chips
The problems such as meter is complicated, stability is poor, design cost is high.
Brief description of the drawings
Fig. 1 is the overhaul flow chart of the present invention.
Fig. 2 is the structured flowchart of the present invention.
Fig. 3 is the circuit block diagram that LVDS transport modules and LVDS turn RGB block in Fig. 2.
Fig. 4 is the circuit block diagram of RGB data detection module in Fig. 2.
Fig. 5 is the circuit block diagram that control module is detected in Fig. 2.
In figure：1-LVDS transport modules, 11-LVDS transmission matching modules, 12-LVDS signal shaping modules；13-LVDS believes
Number electrically sampling and quantization modules；The electric detection modules of 14-LVDS；
2-LVDS turns RGB block, 21-LVDS vision signal demodulation modules, 22-LVDS vision signal decoder modules；
3-RGB data detection modules, 31-RGB signal buffer control modules, 32-RGB frame data cache the first module, 33-
The module of RGB frame data buffer storage second, 34- original image buffer control modules, 35- initial data image cache the first module, 36-
Initial data image caches the second module, 37-RGB data detection modules, 38- signal detecting result output modules, the inspection of 39- data
Survey fifo module；
4- detects control module, 41- Ethernets, RS232, RS485 interface module, 42-USB, SD card interface module, 43-
Upper-layer configured module.
Embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings, is easy to that this hair is well understood
It is bright, but they do not form to the present invention and limited.
As Figure 1-5, the method for LVDS vision signals comprises the following steps caused by detection video source of the invention：
Control parameter is set in the PC of upper strata, and PC control parameters are set and identical, the control parameter bag that is detected video source
Include：LVDS transmission match parameters (termination impedance, balanced), LVDS electric parameters benchmark (maximum voltage, minimum voltage, overshoot, under
Punching, electric current etc.), LVDS demodulation parameters (Dan Shuansi LINK numbers, transmission line sequence), video decoding parametric (RGB-6/8/10bit, depending on
Frequency decoding standard (VISA/JIDEA)), it is tested image level resolution ratio, vertical resolution (and resolution ratio of original image).
Above-mentioned PC control parameters are sent into detection control module 4 by Ethernet or RS232, RS485 Serial Port Line.
The above-mentioned Ethernet containing PC control parameters is received by Ethernet, RS232, RS485 interface module 41, serial ports is believed
Number and recover its parameter and be sent into upper-layer configured module 43.PC control upper-layer configured module 43 is distributed to other each functions
Module.After each functional module completes relative set and initialization, upper-layer configured module 43 produces LVDS and electrically detects control letter
Number the electric detection modules 14 of LVDS are given, first the LVDS signals electrical characteristic for being detected video source is detected.When electric testing result
View data detection is carried out again when in the range of LVDS electric parameter benchmark.When being detected, it is detected video source and reads original
Beginning image simultaneously produces LVDS vision signals and is output to LVDS transport modules 1.
Step 1, the LVDS sent according to upper-layer configured module 43 electrically detects electricity of the control signal to LVDS vision signals
Gas characteristic is sampled, and obtains the electric parameter of LVDS vision signals and LVDS electric parameters benchmark carries out contrasting detection, output
The electric testing result signals of LVDS.
LVDS transmission matching modules 11 LVDS that exports according to upper-layer configured module 43 transmits match parameter to receiving
Operation is terminated in LVDS vision signals, to make great efforts to revert to signal more chaotic caused by video source into tested LVDS videos
Signal, the LVDS vision signals after then terminated operation is handled are sent to LVDS signals electrically sampling and quantization modules 13, institute
Stating terminated operation includes the matching of LVDS signal impedances, the configuration of LVDS signal equalizations, compensates the signal caused by long range is transmitted
Distortion, decay, it is ensured that LVDS signal qualitys.LVDS signal shapings module 12 carries out shaping to the LVDS vision signals of input and put
Greatly, to reach optimum signal quality, avoid follow-up signal from changing and detect and judge by accident.
LVDS signals electrically with quantization modules 13 to electrical characteristics such as the voltage of LVDS vision signals, electric currents adopt by sampling
Sample, and quantified institute's sampled signal (analog quantity) by AD conversion chip, that is, it is converted into different size of digital bit values.
The electric detection modules 14 of LVDS are electrically joined receiving the LVDS that sends of detection control module and electrically detect control signal and LVDS
After base standard, the electrical value of the LVDS signals of sampling and LVDS electric parameter benchmark are contrasted.If LVDS sample magnitudes
Then represent that LVDS vision signal electrical qualities are up to standard between the maxima and minima of LVDS electric parameter benchmark, otherwise LVDS
Vision signal electrical quality is not up to standard.Then testing result (whether up to standard tabulating which parameter) is given to signal detection
As a result output module 38, give module 43 all the way afterwards and return to PC via Ethernet, RS232, RS485 interface module 41
Result is shown, another way, which produces, shows that signal feeding carries display screen 5 and shown.
Step 2, LVDS vision signals are converted into rgb video signal.
After upper-layer configured module 43 obtains LVDS electric testing results, voluntarily start view data detection control if up to standard
Making to RGB data detection module 3, makes it receive the view data automatic detection of rgb video signal；Otherwise the LVDS videos are stopped
The detection of signal, wait PC to do and instruct in next step, be that the electrical characteristic for detecting new LVDS vision signals again is still stopped
Only whole detection process.When the electrically detection of LVDS vision signals is up to standard, then LVDS vision signals demodulation module 21 receives shaping
Good LVDS signals and the configuration parameter sent according to upper-layer configured module 43 carry out LVDS Dan Shuansi LINK signals and demodulate, adjust
Receive line sequence.The video decoding parametric that LVDS vision signals decoder module 22 is sent according to upper-layer configured module 43 carries out LVDS solutions
Code, according to 6bit, 8bit, 10bit picture format, VESA/JIEDA standard handovers into standard rgb video signal (i.e. VSYNC,
HSYNC, DE, DATA), export to RGB data detection module 3.
Step 3, if the electric testing results of LVDS that upper-layer configured module 43 receives are that LVDS video signal qualities are up to standard,
View data detection control signal is produced, starts to cache every frame RGB data in the rgb video signal successively；Produce original graph
As reading control signal, start to cache raw image data, then will be delayed according to original image horizontal resolution, vertical resolution
The every frame RGB data kept carries out contrasting detection with the raw image data successively, and output image Data Detection result is described
The object of detection includes each pixel size and location of pixels of RGB data.
After LVDS is electrically up to standard, upper-layer configured module 43 reads original image automatically by USB, SD card interface module 42
(original image and detected video source be same image) and produce original image and read control signal and give original image caching control
Molding block 34 makes it cache the image.The original image is first cached to initial data image by original image buffer control module 34
Cache in the first module 35, initial data image is then cached to when detecting next width original image and caches the second module 36, this
Two modules do ping-pong operation and use high speed DDR storage chips, so as to the real-time detection different images data without pause.
RGB data detection module 3 is first cached to the rgb image data of reception and detected again, and testing result is exported to aobvious
Display screen 5 shows and is sent to through module 43 on PC and shown.When RGB data detection module 37 receives view data detection control letter
Number when then send operation start control signal rgb signal buffer control module 31 receive rgb video signal.When rgb signal caches
Control module 31 receives a new two field picture (finding there is VSYNC from high level to low level saltus step), then by the frame
View data is cached to the first module of RGB frame data buffer storage 32, when the frame (i.e. present frame, hereinafter referred to as n-th frame, n are positive integer)
After data are all cached to the first module of RGB frame data buffer storage 32, continue to cache the (n+1)th frame immediately to RGB frame data buffer storage the
In two modules 33, while the n-th frame data buffer storage of RGB data detection module 37 is notified to complete that it need to be detected；Work as RGB data
When detection module 37 detects to the n-th frame data cached in the first module of RGB frame data buffer storage 32, while rgb signal delays
Control module 31 is deposited to continue the (n+1)th frame RGB data to be cached to the second module of RGB frame data buffer storage 33；When the (n+1)th frame RGB numbers
After the completion of caching, RGB data detection module 37 has been completed to inspection data cached in the first module of RGB frame data buffer storage 32
Survey, be now further continued for detecting data cached in the second module of RGB frame data buffer storage 33.That is rgb signal buffer control
Module 31 and RGB data detection module 37 alternately cache, detect n-th, n+1 frame RGB datas respectively, that is, carry out caching/detecting
Between ping-pong operation, so can the continuous detection without pause per frame data, improve detection efficiency and reliability.RGB frame number
The first module 35, initial data are cached according to the first module 32 of caching, the second module of RGB frame data buffer storage 33, initial data image
The second module of image buffer storage 36 can be realized by DDR storage chips, so as to realize big resolution ratio big data quantity, high read-write behaviour
Make, high reliability operation.
When RGB data detection module 37 detects to RGB data, it is original that operating control signal operation is first sent respectively
Image buffer storage control module 34, rgb signal buffer control module 31 read the current raw image data cached and n-th frame
It is detected RGB data.By cache module is realized by phase same rate DDR storage chips, but each DDR devices are because its own gives birth to
Production. art and individual difference, cause its read-write operation speed not identical.Therefore to ensure reliably to detect, by from caching mould
The data read in block need to be stored into 39 corresponding FIFO of Data Detection fifo module (FirstInput First Output) again
In, Data Detection fifo module 39 has two FIFO to be stored in raw image data and detected RGB data respectively.RGB data
Detection module 37 is according to the horizontal resolution (i.e. a line view data number) configured by operating original image buffer control
Module 34, rgb signal buffer control module 31 write a line raw image data and a line is tested RGB data to respective FIFO
In, the data then read simultaneously in this two FIFO afterwards are compared, and record pixel size result (the identical then table compared
Show correct, otherwise represent mistake) and contrast location of pixels (which pixel of which row, X, Y-coordinate) and by its result with
Give signal detecting result output module 38 in position.Due in FIFO again caching once, reading data that can be simultaneously synchronous, because
This can use pipeline system to operate in correction data, i.e., continuously read and compare, and constantly writing data into
FIFO, whole comparison procedure of reading and writing is without pause.
Last raw image data is written to when initial data image caches the first module 35 in FIFO and in RGB numbers
After the completion of comparing according to detection module 37, if the n-th frame of rgb signal buffer control module 31 is also that last data are completeer accordingly
Into, and middle comparison procedure does not have mistake, then it is assumed that the output of frame LVDS images is correct, then proceedes to detect the (n+1)th frame data.
If when rgb signal buffer control module 31 still has data to be detected after last raw image data is completeer, then it is assumed that image
Resolution ratio mistake, and give RGB data testing result to signal detecting result output module 38 and be transmitted to upper strata PC, and after stopping
The comparison (can not judge to be detected image resolution ratio, more meaningless) of continuous image.If when the resolution ratio of view data detects just
Really, and in some pixel errors of intermediate image then continue to detect the (n+1)th frame.
View data testing result and the electric testing results of LVDS are converted into by signal detecting result output module 38
It is adapted to the interface data of display screen 5 to give its display, while is converted into the recognizable protocol format of upper layer software (applications) and controls mould after testing
Block 4 gives upper strata PC processing.
After the completion of current piece image detection, before tested video source changes piece image output, upper strata PC first produces
Switch image command to upper-layer configured module 43.Upper-layer configured module 43 is original by next by USB, SD card interface module 42
Image is transmitted to original image buffer control module 34 and is cached to (initial data image in initial data image the second module 36 of caching
Cache the first module 35 caching is current original image).Switching graphics control signals are produced after completing to cache and (are included in figure
As in Data Detection control signal) RGB data detection module 37 is given, while tested video source begins to send out lower piece image
LVDS vision signals.RGB data detection module 37 is then still completed present image when receiving switching graphics control signals and cached
Current n frames and n+1 frame RGB data in the first module of RGB frame data buffer storage 32, the second module of RGB frame data buffer storage 33
Compare, operate rgb signal buffer control module 31 afterwards by the first module of RGB frame data buffer storage 32, RGB frame data buffer storage second
Module 33 is reset, and view data detection process afterwards is same as described above.In view of the LVDS videos of video source hair next image
The process of signal has a delay, therefore also controls rgb signal buffer control module 31 to be delayed after the about transmission time of field and receive again
Signal.
The content not being described in detail in this specification belongs to prior art known to professional and technical personnel in the field.
Claims (8)
- A kind of 1. method for detecting LVDS vision signals caused by video source, it is characterised in that comprise the following steps：Step 1, control signal is electrically detected according to LVDS to sample the electrical characteristic of LVDS vision signals, electrical characteristic bag Voltage and current is included, the electric parameter and LVDS electric parameters benchmark for obtaining LVDS vision signals carry out contrasting detection, if LVDS The electric parameter of vision signal is in the range of LVDS electric parameter benchmark, then LVDS is electrically detected up to standard, and otherwise LVDS is electric Detection is not up to standard, stops the detection of the LVDS vision signals；Step 2, if LVDS electrically detects up to standard, LVDS vision signals are converted into rgb video signal：Entered according to configuration parameter Row LVDS Dan Shuansi LINK signals demodulation, adjustment receive line sequence, according to video decoding parametric carry out LVDS decodings, according to 6bit, LVDS vision signals are converted into the rgb video signal of standard by 8bit, 10bit picture format, VESA/JIEDA standards；Step 3, view data detection control signal is produced, starts to cache every frame RGB numbers in the rgb video signal successively According to；Produce original image read control signal, start cache raw image data, then according to original image horizontal resolution, The every frame RGB data cached is carried out contrasting detection, output image number by vertical resolution with the raw image data successively According to testing result, the object of the detection includes each pixel size and location of pixels of RGB data.
- A kind of 2. method for detecting LVDS vision signals caused by video source according to claim 1, it is characterised in that：Institute State in step 1 before being sampled to the electrical characteristic of LVDS vision signals, first according to the characteristic of LVDS vision signals, receive LVDS electric parameters benchmark, LVDS transmission match parameter, LVDS reconcile parameter and video decoding parametric；Receive original image number According to；Original image horizontal resolution, vertical resolution are set；Export LVDS transmission match parameter, LVDS electric parameters benchmark, LVDS demodulation parameters, video decoding parametric, produce the LVDS and electrically detect control signal.
- A kind of 3. method for detecting LVDS vision signals caused by video source according to claim 2, it is characterised in that：Institute State in step 1 before being sampled to the electrical characteristic of LVDS vision signals, match parameter is first transmitted to video according to LVDS Operation is terminated in LVDS vision signals caused by source, and then the LVDS vision signals after terminated operation are carried out at shaping amplification Reason obtains optimal LVDS vision signals.
- A kind of 4. method for detecting LVDS vision signals caused by video source according to claim 3, it is characterised in that： The LVDS vision signals sampled to its electrical characteristic are that the LVDS vision signals after operation processing are terminated；It is described The LVDS vision signals for being converted into rgb video signal are the LVDS vision signals after progress shaping enhanced processing；The termination behaviour Work includes the matching of LVDS signal impedances, the configuration of LVDS signal equalizations, compensates the signal distortion caused by long range is transmitted, declines Subtract, it is ensured that LVDS signal qualitys.
- A kind of 5. method for detecting LVDS vision signals caused by video source according to claim 2, it is characterised in that：Institute State and LVDS vision signals are converted into the process of rgb video signal in step 2 included：According to LVDS demodulation parameters to LVDS videos Signal is demodulated, adjusts reception line sequence processing, and the serialized encoded data of LVDS vision signals is demodulated into parallel data；Then The parallel data of LVDS vision signals is decoded according to video decoding parametric, is converted into rgb video signal.
- A kind of 6. method for detecting LVDS vision signals caused by video source according to claim 1, it is characterised in that：Institute State in step 3 and cache per frame RGB data successively and enter the every frame RGB data cached with the raw image data successively The process of row contrasting detection includes：N-th frame RGB data is first cached, after the completion of n-th frame RGB data caches, continues caching (n+1)th Frame RGB data；While the (n+1)th frame RGB data is cached, n-th frame RGB data and the raw image data cached are carried out Contrasting detection, after the completion of the detection of n-th frame RGB data, the (n+1)th frame RGB data has cached；Now continue to detect the (n+1)th frame RGB numbers According to the n-th+2 frame RGB data of caching；Detected successively by the transmission sequence of RGB data afterwards, until current LVDS videos are believed Number detection complete, wherein n is positive integer.
- A kind of 7. method for detecting LVDS vision signals caused by video source according to claim 6, it is characterised in that：Institute State before every frame RGB data and raw image data detected, be first successively read respectively each row of data of RGB data with it is original The each row of data of view data, by the often row RGB data read and often row raw image data synchronizes operation, makes its same Step output.
- A kind of 8. method for detecting LVDS vision signals caused by video source according to claim 6, it is characterised in that：Institute After the completion of stating current LVDS video signal detections, all RGB datas cached before are removed, cache next width figure again again afterwards The rgb video signal that the LVDS vision signals of picture are converted.
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| CN104978917B (en) * | 2015-07-20 | 2017-12-12 | 武汉精测电子技术股份有限公司 | DP vision signals automatic test approach and device |
| CN104967844B (en) * | 2015-07-20 | 2017-03-01 | 武汉精测电子技术股份有限公司 | LVDS video signal automatic test approach and device |
| CN105491373B (en) * | 2015-12-05 | 2017-07-11 | 武汉精测电子技术股份有限公司 | A kind of LVDS vision signals single channel turns the device and method of multichannel |
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| CN104185015A (en) * | 2013-05-20 | 2014-12-03 | 立讯精密工业股份有限公司 | Testing device for digital video signal conversion products |
| CN103414933B (en) * | 2013-07-29 | 2016-12-28 | 华为技术有限公司 | Analog video signal output device and electronic equipment |
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