CN105810139B - Display screen monitors system and display screen monitoring method - Google Patents
Display screen monitors system and display screen monitoring method Download PDFInfo
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- CN105810139B CN105810139B CN201610391317.1A CN201610391317A CN105810139B CN 105810139 B CN105810139 B CN 105810139B CN 201610391317 A CN201610391317 A CN 201610391317A CN 105810139 B CN105810139 B CN 105810139B
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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Abstract
The invention belongs to field of display technology, and in particular to display screen monitors system and display screen monitoring method.It includes exciting unit, acquisition unit, query unit and judging unit that the display screen, which monitors system, in which: exciting unit is set to the input terminal of sequential control circuit, for apply include setting signal driving source, driving source enters sequential control circuit；Acquisition unit is set to the output end of source electrode drive circuit, for acquiring monitoring signals handling through sequential control circuit and source electrode drive circuit, being converted by driving source, and monitoring signals is sent to query unit；Query unit prestores response signal compatible with picture signal, for inquiring corresponding response signal according to setting signal；Judging unit determines whether the working condition of display screen is normal for receiving and comparing monitoring signals and response signal, and according to comparison result.It is monitored during normal display to whether display drive circuit works normally, and guarantees the reliable of driving signal processing.
Description
Technical field
The invention belongs to field of display technology, and in particular to a kind of display screen monitoring system and display screen monitoring method.
Background technique
In some special applications, the liquid crystal display as used in the environment such as vehicle-mounted, industrial, aeronautical instrument instrument,
The information of real-time display is extremely important on display screen, therefore has higher requirement to the reliability that video is shown, the moment understands aobvious
The display situation of display screen is most important.
However, user of service is difficult visually intuitively to find under the little scene of some display variation amplitudes
Information shows mistake, i.e. picture freeze and can not find in time that this may bring economic or even safety loss to user.
Therefore, real-time monitoring show situation, find the problem and take measures in time, be the liquid crystal displays such as airborne, carrier-borne show and
Some industrial display screens are required.Setting WatchDog Timer is mostly used greatly for liquid crystal display malfunction monitoring at present
With the method for the pre-set hardware of clocked flip come monitor display screen electric signal or picture it is whether problematic, then pass through certain
The integrality of kind movement answering system.This method has certain retardance, and can supervise to guarantee the efficiency of system
The problem of measuring is also fewer.
It more specifically, can for the working state monitoring of display screen while realizing the function of showing specific picture
To be divided into the electric signal monitoring to Driver Card and the monitoring of display picture.The monitoring of electric signal can not judge timing control
Correcting errors for the end the Tx output mini-LVDS signal of circuit Tcon, also can not judge whether display module end has broken string to cause electrically
Signal is abnormal；Whether display picture is normally monitored, although may determine that whether display screen works normally, it is fixed to need
Shi Qidong test pictures, and judged by observer's feedback or computer signal is drawn, if test pictures display frequency
It is too low then can not effective real-time monitoring, frequency is excessively high, will affect the normal use of display screen.
Summary of the invention
The technical problem to be solved by the present invention is to aiming at the above shortcomings existing in the prior art, provide a kind of display screen
Whether monitoring system and display screen monitoring method solve at least normal to display drive circuit during normal display
The problem of monitoring of work, ensure that the reliability of display screen driving signal processing.
Solving technical solution used by present invention problem is display screen monitoring system, display screen monitoring system
System for being monitored to display screen, the display screen include for for each pixel conversion signal sequential control circuit and
Source electrode drive circuit, the display screen monitoring system includes exciting unit, acquisition unit, query unit and judging unit, in which:
The exciting unit is set to the input terminal of the sequential control circuit, includes setting signal for applying
Driving source, the driving source enter the sequential control circuit；
The acquisition unit is set to the output end of the source electrode drive circuit, for acquiring through the timing control electricity
Road and source electrode drive circuit processing, the monitoring signals converted by the driving source, and the monitoring signals are sent to described
Query unit；
The query unit prestores response signal compatible with described image signal, for being believed according to the setting
Number corresponding response signal of inquiry；
The judging unit, for reception and the monitoring signals and the response signal, and according to comparison result
Determine whether the working condition of the display screen is normal.
Preferably, for each pixel, the driving source has the dot structure same color with the display screen
Test pictures signal number, the test pictures signal be three primary colors data or four color data；
The driving source includes the picture signal that can be used to that pixel described in D row to be driven to be shown, the test pictures
Signal and picture signal are successively by being advanced into the sequential control circuit, in which: D is natural number, and D≤6.
Preferably, the output end of the sequential control circuit is connected at least two source electrode drive circuits, the test
Picture signal is entered different source electrode drive circuits by column split from described image signal；
The judging unit receives the homochromy data after at least two source electrode drive circuit conversions, compares described in two
The difference of the homochromy data of source electrode drive circuit, and the display screen is determined according to the difference of homochromy data and the size of given threshold
Whether working condition is normal.
Preferably, according to the difference of sequential control circuit output signal type, the query unit include voltage module,
At least one of gamma transformation module and tfi module, in which:
The voltage module prestores response signal compatible with voltage in described image signal, for according to
Setting signal inquires the corresponding response signal relevant to voltage；
The gamma transformation module prestores response signal compatible with tone in described image signal, is used for basis
The setting signal inquires the corresponding response signal relevant to tone；
The tfi module prestores response signal compatible with timing in described image signal, for according to
Setting signal inquires the corresponding response signal relevant to timing.
Preferably, the test pictures signal enters the timing control by same input interface with described image signal
Circuit processed, the input interface are LVDS interface；And the monitoring signals and institute after sequential control circuit conversion
It states picture signal and the sequential control circuit is exported by same output interface, the output interface is mini-LVDS interface.
A kind of display screen monitoring method, comprising steps of
Apply driving source, the driving source includes setting signal, the test pictures signal in the setting signal and figure
As signal is successively by being advanced into sequential control circuit；
Monitoring signals that acquisition is handled through the sequential control circuit, being converted by the driving source；
The corresponding response signal is inquired according to the setting signal；
It receives and the monitoring signals and the response signal, and determines the work of the display screen according to comparison result
Whether normal make state.
Preferably, for each pixel, the driving source includes the dot structure same color with the display screen
Test pictures signal, the test pictures signal be three primary colors data or four color data；
The driving source includes the picture signal that can be used to that pixel described in D row to be driven to be shown, the test pictures
Signal and described image signal are successively by being advanced into the sequential control circuit, in which: D is natural number, and D≤6.
Preferably, the output time at the beginning of the monitoring signals of the driving source conversion, earlier than for driving institute
State the D horizontal-scanning interval of the picture signal of pixel described in the first row of display screen setting regions；
Alternatively, including the monitoring signals of the driving source conversion of setting signal, and then for driving the display
Shield the picture signal output of the last one pixel of setting regions, and continues D horizontal-scanning interval.
Preferably, the display screen includes that at least two source electrodes being connected with the output end of the sequential control circuit drive
Dynamic circuit, the test pictures signal are entered different source electrode drive circuits by column split from described image signal；
The homochromy data for receiving at least two source electrode drive circuits compare the homochromy of two source electrode drive circuits
The difference of data, and determine whether the working condition of the display screen is normal according to the difference of homochromy data and the size of given threshold.
Preferably, according to the difference of sequential control circuit output signal type, at least one of following information is prestored:
Prestore response signal compatible with voltage in described image signal, according to the setting signal inquiry it is corresponding with
The relevant response signal of voltage；
Prestore response signal compatible with tone in described image signal, according to the setting signal inquiry it is corresponding with
The relevant response signal of tone；
Prestore response signal compatible with timing in described image signal, according to the setting signal inquiry it is corresponding with
The relevant response signal of timing.
Preferably, the test pictures signal enters the timing control by same input interface with described image signal
Circuit processed, the input interface are LVDS interface；And the monitoring signals and institute after sequential control circuit conversion
It states picture signal and the sequential control circuit is exported by same output interface, the output interface is mini-LVDS interface.
The beneficial effects of the present invention are:
The display screen monitors system and display screen monitoring method and increases monitoring signals by blanking period, so that monitoring letter
Number processing identical with the picture signal normally shown can be obtained, but the not actual displayed in the pixel of display screen, from
And timely and effectively judge whether display screen breaks down, realize during normal display to display drive circuit whether
The monitoring of normal work ensure that the reliability of display screen driving signal processing, caused by avoiding because display screen shows failure
Economy, manpower loss.
Detailed description of the invention
Fig. 1 is the subregion schematic diagram of blanking interval in the display screen of the invention；
Fig. 2 is the schematic diagram that display screen monitors system and its is monitored to display screen in the embodiment of the present invention 1；
Fig. 3 is that the data during display screen drives between consecutive frame image enable timing diagram；
Fig. 4 is the drive circuit schematic diagram of display screen；
Fig. 5 is the structural schematic diagram that display screen monitors system in the embodiment of the present invention 2；
Fig. 6 is the pin distribution schematic diagram of sequence controller in driving circuit in the embodiment of the present invention 2；
In figure:
The viewing area 1-；2- horizontal blanking interval；3- vertical blanking interval；
4- gate driving circuit；5- source electrode drive circuit；6- sequential control circuit；
11- exciting unit；12- acquisition unit；13- query unit；131- voltage module；132- gamma transformation mould
Block；133- tfi module；14- judging unit.
Specific embodiment
Technical solution in order to enable those skilled in the art to better understand the present invention, with reference to the accompanying drawing and specific embodiment party
Formula monitors system to the display screen of the invention and display screen monitoring method is described in further detail.
Technical concept of the invention is, with reference to the timing standard that VESA Video Electronics Standards Association proposes, wherein providing
It is required under various resolution ratio other than effective pixel region as the reserved front and back blanking interval of display, i.e. display is expert at display
Signal or frame show edge behind the forward position that can all have certain time interval between signal.Display screen display during, either every
Row scanning still progressively scans, and (is embodied in data between the display image of each frame (frame) and enables data enable driving
In, data enable, vehicle economy) there are one " blanking interval (blanking) ", i.e., every frame image display terminates flyback pixel
When be blanked without show, blanking interval only account for display the time part, it is very short.Most of display screen is all at present
Using progressive scanning mode.
The present invention accesses specific test pictures signal without showing come to normal display letter along the time using this front and back
It number is monitored.As shown in Figure 1, the present invention utilizes display screen consecutive frame image during display to show temporal blanking
Phase corresponds in the vertical blanking interval 3 (blanking interval between consecutive frame) divided display screen in vertical direction or horizontal direction
Horizontal blanking interval 2 (blanking interval between adjacent rows), and blanking period increase monitoring signals so that monitoring signals can obtain with
The identical processing of the picture signal normally shown, but the not actual displayed in the pixel of display screen, i.e., using electric signal+
The monitoring mode of test pictures signal, and test pictures signal is not listed in the blanking interval for showing in timing but being listed in timing,
To timely and effectively judge whether display screen breaks down, realize is to display drive circuit during normal display
The monitoring of no normal work ensure that the reliability of display screen driving signal processing, avoid because display screen shows that failure causes
Economy, manpower loss.
Embodiment 1:
The present embodiment provides a kind of display screens to monitor system, and the display screen monitoring system is for supervising display screen
It surveys, display screen monitoring system can timely and effectively monitor the signal condition of display screen, it is ensured that display screen works normally, and guarantees aobvious
Show the correctness of picture.
As shown in Fig. 2, display screen include for for each pixel conversion signal sequential control circuit 6 and source electrode drive
Dynamic circuit 5, sequential control circuit 6 (Timing Controller, abbreviation TCON) are that external signal and internal signal divide water
Ridge, major function are coloration control and timing control, also have the function of data reversal, pixel polarity inversion, and have automatic
The figure of refresh mode and aging.By sequential control circuit 6, can by the data-signal externally supplied, control signal with
And clock signal be converted into being suitable for respectively the data-signal of source electrode drive circuit 5 and gate driving circuit 4, control signal, when
Clock signal, and enter display screen eventually by source electrode drive circuit 5 and gate driving circuit 4.Presently, gate driving circuit
4 for providing gate drive signal, and function is relatively simple and is easier to guarantee, and the signal transmitted by source electrode drive circuit 5
Type not only multiclass and also sentence accidentally mode it is different.
The display screen monitoring system of the present embodiment adds data enable signal in the LVDS signal of sequential control circuit 6
(Date Enable, vehicle economy) is motivated as test pictures signal, i.e. clock signal in setting y+1~Y+D Fig. 2 will be added
Test pictures signal and picture signal synchronize processing, and the test pictures signal added is converted in output end
Monitoring signals are monitored, and then determine the working condition of driving circuit.
For display screen monitoring system, referring to figs. 2 and 3, input are as follows: by the vision signal of debugging, the view
It is for testing but not showing picture that frequency signal, which retains the signal of the normal display picture sequentially entered and Y+1~Y+D,
Signal specific；Output are as follows: the display driving voltage fed back from each source electrode drive circuit 5.
As shown in Fig. 2, display screen monitoring system includes exciting unit 11, acquisition unit 12, query unit 13 and determines
Unit 14, each unit function declaration are as follows:
Exciting unit 11 is set to the input terminal of sequential control circuit 6, for apply include setting signal excitation
Source, for example, driving source is various grey menus or the sprites such as the various sprites and 16/32/256 such as red, green, blue
Or black and white screen, and sequential control circuit 6 is entered with some time interval loop play.Wherein, for each pixel, excitation
Source has the test pictures signal with the dot structure same color of display screen, and test pictures signal is three primary colors data or four colors
Data；Driving source include the picture signal that can be used to that D row pixel to be driven to be shown, test pictures signal and picture signal according to
It is secondary by being advanced into sequential control circuit 6, in which: D is natural number, and D≤6.
The display screen of the present embodiment increases D p-wire in the input terminal of sequential control circuit 6, and D here is equal to excitation
The line number D for the picture signal that source is used to that pixel to be driven to be shown is used for transmission Y+1~Y+D as testing but not showing
Showing the pumping signal of picture, i.e., D DE waveform in such as Fig. 3, a waveform corresponds to the sweep time of a line p-wire, and defeated
Outlet only retains the taking-up end of the conversion signal of increased driving source, does not increase the picture signal of actual pixels point, therefore not
It will increase additional display picture.
Acquisition unit 12 is set to the output end of source electrode drive circuit 5, for acquiring through sequential control circuit 6 and source electrode
Monitoring signals that driving circuit 5 is handled, being converted by driving source, and monitoring signals are sent to query unit 13.When DE is Y+1
When, the decoded picture of timing is test pictures, can be collected unit 12 and acquire and monitor, but and not appear in display screen
On.
Query unit 13 prestores response signal compatible with picture signal, corresponds to for being inquired according to setting signal
Response signal.The response signal prestored in query unit 13, to pass through each electrical letter under the normal work of original test acquisition
Number standard value, can be burned onto advance in query unit 13.For different display screens, there may be different electric signals
Standard value only need to be tested and be prestored in advance.
Judging unit 14 determines display screen for receiving and comparing monitoring signals and response signal, and according to comparison result
Working condition it is whether normal.It may further be preferable that further include amplifier and analog-digital converter before judging unit 14, for
Digital signal in Driver Card can be communicated directly with judging unit 14, and analog signal passes through amplifier, analog-digital converter
(Analog-to-Digital Converter, abbreviation ADC), which is converted into digital signal and is sent to judging unit 14, to be compared.
Judging unit 14 can use MCU (Micro Control Unit, microcontroller) or CPU (Central Processing
Unit, central processing unit), MCU or CPU can carry out feedback signal judging and by preset as control chip
Peripheral circuit handles breakdown judge, for example opens secondary monitor.Under normal conditions, display screen includes being arranged in a matrix
Multiple lines and multiple rows pixel, the pixel of row orientation successively progressively scan opening, column arrangement side by gate driving circuit 4
To pixel by source electrode drive circuit 5 successively press column received image signal.For the timeliness for guaranteeing picture signal, multiple row pixel
The distance point sector for pressing neighbor distance is driven by different source electrode drive circuits 5, same source electrode drive circuit 5 for drive away from
From similar multiple row pixel.The display screen of the present embodiment includes at least two to be connected with the output end of sequential control circuit 6
Source electrode drive circuit 5, test pictures signal are entered different source electrode drive circuits 5 by column split from picture signal；Judging unit
14 receive the homochromy data of at least two source electrode drive circuits 5, compare the difference of the homochromy data of two source electrode drive circuits 5, and
Determine whether the working condition of display screen is normal according to the size of the difference of homochromy data and given threshold.
In the display screen of the present embodiment, the resolution ratio of gate driving circuit 4 is Y, then data enable signal shown in Fig. 3
DE increases D p-wire on the basis of the signal line number of original resolution ratio, and p-wire includes setting for correspondingly introducing
The number of the driving source of signal, p-wire is determined according to the speed of subsequent process circuit and sweep time, such as by speed and is swept
Retouching the time is set as proportional relation, if the speed of subsequent process circuit is sufficiently fast, the p-wire feedback data acquired back is straight
Tap into capable judgement, it is possible to reduce p-wire number.Here, it need to only ensure subsequent electricity in the time of each frame picture test wire delay
Road can will draw signal to judging unit 14 and be handled, and be generally advisable with D=3~4 piece p-wire, in corresponding diagram 2
The viewing area 1 of display screen is practical vertically to line number Ver=Y+D.Wherein D p-wire is only generated in sequential control circuit 6
It is embodied in clock signal, but is not furnished with actual pixel line in viewing area 1, the corresponding test data of such p-wire will not be shown
Show, it will not be to should actually show that image impacts.
The display screen of the present embodiment monitors system, when test pictures signal and picture signal are entered by same input interface
Sequence control circuit 6, input interface are LVDS interface (Low Voltage Differential SCSI, i.e. low-voltage differential interface),
The driving circuit of display screen further includes can for the normal signal of display such as VGA, HDMI etc. to be decoded as sequential control circuit
With the decoding circuit of the LVDS signal of receiving.；And the monitoring signals after the conversion of sequential control circuit 6 are led to picture signal
Same output interface output timing control circuit 6 is crossed, output interface is mini-LVDS interface.
Correspondingly, the present embodiment also provides a kind of display screen monitoring method, comprising steps of
Step 1): applying driving source, and test pictures signal and picture signal are successively by being advanced into sequential control circuit 6.
In this step, for each pixel, driving source has the test with the dot structure same color of display screen
Picture signal, test pictures signal are three primary colors data or four color data；Driving source includes that can be used to that D row pixel to be driven to carry out
The picture signal of display, in which: D is natural number, and D≤6.
Test pictures signal enters sequential control circuit 6 by same input interface with picture signal, and input interface is
LVDS interface.The time that the driving source of the present embodiment enters display screen is blanking interval, i.e. the beginning of the monitoring signals of driving source conversion
The output time at end, earlier than the D horizontal-scanning interval for the picture signal for driving the first row pixel of display screen setting regions；
Alternatively, including the monitoring signals of the driving source conversion of setting signal, and then for driving the last of display screen setting regions
The picture signal output of one pixel, and continue D horizontal-scanning interval.To guarantee for driving D row pixel to be shown
The driving source of picture signal is in vertical blanking interval, can play test effect without impacting to normal display.
Step 2): monitoring signals that acquisition is handled through sequential control circuit 6, being converted by driving source.
In this step, the setting signal in driving source and the picture signal normally shown pass through same timing control electricity
Road 6 is handled, and is converted to monitoring signals, is exported jointly with the picture signal after conversion.
Step 3): corresponding response signal is inquired according to setting signal.
The step can carry out simultaneously with step 2), i.e., inquire the setting signal in driving source, obtain and believe with image
Number response signal obtained by same treatment rule.
Step 4): receiving and compares monitoring signals and response signal, and the work shape of display screen is determined according to comparison result
Whether state is normal.
Monitoring signals and picture signal after the conversion of sequential control circuit 6 are controlled by same output interface output timing
Circuit 6, output interface are mini-LVDS interface.
Since display screen includes at least two source electrode drive circuits 5 being connected with 6 output end of sequential control circuit, picture is tested
Face signal is entered different source electrode drive circuits 5 by column split from picture signal；In this step, two source electrodes are at least received to drive
The homochromy data of dynamic circuit 5, compare the difference of the homochromy data of two source electrode drive circuits 5, and according to the difference of homochromy data with set
The size for determining threshold value determines whether the working condition of display screen is normal.
In the sequential control circuit 6 of display screen, corresponded in LVDS signal timing vision signal can be set to it is specific
Picture is switched by frame, for example, driving source be the various grey menus such as the various sprites and 16/32/256 such as red, green, blue or
Person's sprite or black and white screen, and broadcast with some time interval circulation.As shown in Fig. 2, every source electrode drive circuit 5 will be same
The monitoring signals that one color same position data output signal draws (first pin of such as every source electrode drive circuit 5) are drawn
Out, after the monitoring signals analog-to-digital conversion converted setting signal in driving source and in judging unit 14 with specific setting signal
Corresponding response signal comparison, so that it may which whether detecting real-time picture has exception, and then realizes the monitoring to display picture.
In step 4), in case of picture freeze problem, then the two frame monitoring signals acquired back are not according to specific picture
Face switching can be judged as display failure, and the display screen is switched to spare display screen in time.It can be realized by anti-
Feedback signal is compared with preset reference value, is judged failure and is handled, for example opens secondary monitor.
In addition, breaking in case of the end cell, abnormal signal can also be embodied directly in.DE signal is in Y+1~Y+D and sweeps
When retouching row, display picture is for example different grey menus of specific picture, and the driving source if the excitation source signal of Y+1 is 255, Y+2 is believed
Number be 128, picture will not actual displayed to viewing area still go out the column picture from 5 output response of source electrode drive circuit at this time
Output voltage values can compare gray scale reference voltages value, judge whether it is specific grey-scale voltage.This comparison can draw feedback and arrive
The processing unit (i.e. judging unit 14) of rear end is compared and handles, can directly standby signal it is abnormal, can also be according to need
The auxiliary display screen for asking starting to connect in advance carries out spare display.
Certainly, the judging unit 14 in the present embodiment display screen monitoring system also could alternatively be computer monitoring system,
It is directly communicated with computer by a board with ADC conversion, all responses can be directly arranged by upper computer software
Whether the reference value of signal simultaneously compares normal.
The display screen monitoring system of the present embodiment and its corresponding monitoring method are being shown by modifying viewing area timing
Area increases monitoring signals and real-time monitoring, with real-time monitoring picture whether output abnormality, realize to picture signal driving process
Monitoring, judges whether this display has exception from display terminal, can be effectively carried out display screen detecting fault and problem determination,
Improve the reliability of display screen.
Embodiment 2:
The present embodiment provides a kind of display screens to monitor system, and display screen monitoring system can timely and effectively monitor display screen
Signal condition, it is ensured that display screen work normally, guarantee display picture correctness.
The driving circuit of display screen is specific as shown in figure 4, the Vdd signal provided through interface convertor enters DC voltage turn
Circuit is changed, TTL signal enters sequential control circuit in the form of LVDS；The voltage signal converted through DC converting circuit respectively enters
Gate driving circuit, source electrode drive circuit and gamma conversion circuit, into gamma conversion circuit voltage after further converting
Into source electrode drive circuit；Meanwhile the TTL signal converted through sequential control circuit carries out source drive in the form of mini-LVDS
Circuit.In scanning process of the gate driving circuit to pixels of display screen, image data in source electrode drive circuit by column into
Enter pixel, pixel shows corresponding image according to image data.
Whether driving is worked normally, individually is difficult directly to judge the failure institute of liquid crystal display from display picture
The voltage and current value of monitoring driving plate is being needed, and then can primarily determine guilty culprit.The display screen of the present embodiment monitors
Display screen Driver Card is classified according to signal type on the basis of embodiment 1 and provides corresponding three function by system
Energy module, by real-time monitoring and the voltage signal situation for comparing three functional modules, with the aobvious of real-time judge liquid crystal display
Show situation, carry out tentative diagnosis, and then rapid interpretive goes out to show failure cause, can real-time monitoring display screen electric fault and
Picture is monitored under the premise of not influencing using picture shows situation.
Whether display Driver Card is worked normally, display screen monitors system monitoring and the driving signal of display screen is classified
Signal monitoring is carried out for three functional modules, to realize the real-time monitoring to screen driving and display failure.In display screen, when
Sequence control circuit 6 is integrated into chip, and each pin numbering of chip, pin title and pin function are as shown in Figure 6.
Specifically, according to the difference of 6 output signal type of sequential control circuit, as shown in figure 5, query unit 13 includes electricity
At least one of die block, gamma transformation module and tfi module, according to the difference of test object, query unit 13 can be only
Including in voltage module, gamma transformation module and tfi module any one or voltage module, gamma transformation module and when
Any two kinds in sequence module or the whole in voltage module, gamma transformation module and tfi module.At this point, tfi module
For providing feedback clock signal reference, voltage transformation module feeds back voltage signal reference relevant to voltage, gal for providing
Horse conversion module feeds back signal reference relevant to gamma electric voltage for providing, and then determines whether occur by judging unit 14
Failure, three be it is mutual independent and functionally parallel, can be or complete with postponing according to the test object flexible configuration of display screen
It flexibly selects, here without limitation.
Wherein: voltage module 131 prestores response signal compatible with voltage in picture signal, for according to setting
Signal inquires corresponding response signal relevant to voltage.Voltage module is for monitoring letter related with display screen power circuit
Number, provide supply voltage, including VGHI/O, VDDAI/O for driving chip, by one according to demand it is increased, be connected on chain
Known resistance in road may determine that VGH and VDDA size of current, be sentenced by increasing comparator in display screen monitoring system
Whether power-off flow valuve meets the requirements.Comparator can be generally operational amplifier, lead to for a composition of judging unit, comparator
Pressure difference one difference voltage of output for comparing two voltage inputs is crossed, then is sentenced by MCU or CPU according to preset threshold voltage
Whether disconnected be that permissible error range still has already appeared display exception.Alternatively, it is also possible to which VGH and VDDA voltage is directly led out,
By being converted into digital signal in analog-digital converter and carrying out judging whether to meet design value requirement by judging unit 14.
Gamma transformation module 132 prestores response signal compatible with tone in picture signal, for being believed according to setting
Number corresponding response signal relevant to tone of inquiry.Gamma transformation module has for monitoring with gamma reference voltage output circuit
The signal of pass provides gray scale voltage for data drive circuit.As long as the reference voltage VREF that generally monitoring gray scale voltage generates is
Can, it is equally drawn out in analog-digital converter and is converted into digital signal and is judged by judging unit 14.
Tfi module 133 prestores response signal compatible with timing in picture signal, for looking into according to setting signal
Ask corresponding response signal relevant to timing.Tfi module is used to monitor signal related with TCON, and sequential control circuit 6 is
The core circuit of liquid crystal display driving also provides driving core other than the Tx circuit of input interface Rx circuit and output interface
Related timing letter in piece (including gate driving circuit and source electrode drive circuit) control, data processing and display screen special technique
Number.It includes the sequential relationship between the signals such as CPV, TP, STV, these signals that wherein driving chip, which controls related clock signal,
Display screen monitoring system can be directly led out to be judged.
In addition, the related clock signal of data processing includes gamma correction and FRC processing (Frame Rate
Conversion, i.e. video processing) etc. sequential relationship between signals, the two functions are all to play raising to image quality,
Going wrong at most is exactly to show that tone variations occurs in picture, due to can directly embody in picture, wouldn't be examined here
Consider.The related clock signal of display screen special technique, including the sequential relationship between the signals such as data reversal, test pattern, one
As be digital signal, directly lead out display screen monitoring system.
Correspondingly, in the display screen monitoring method of the present embodiment, not according to 6 output signal type of sequential control circuit
Together, in which:
Response signal compatible with voltage in picture signal is prestored, is inquired according to setting signal corresponding related to voltage
Response signal；
Response signal compatible with tone in picture signal is prestored, is inquired according to setting signal corresponding related to tone
Response signal；
Response signal compatible with timing in picture signal is prestored, is inquired according to setting signal corresponding related to timing
Response signal.
In above-mentioned monitoring process, find fault-signal when can carry out preliminary treatment, be such as switched to spare display screen into
Row image shows and alarms to user, while generating failure logging report, in case consequent malfunction analysis uses.Certainly, it monitors
The function of system be not limited to it is above-mentioned enumerate, can take the circumstances into consideration to modify or add according to the actual situation, here without limitation.
Same as Example 1, the judging unit in the present embodiment display screen monitoring system also could alternatively be computer, lead to
It crosses the board with analog-digital converter directly to communicate with computer, all responses can be directly arranged by upper computer software
Whether the reference value of signal simultaneously compares normal.
The display screen monitoring system of the present embodiment and its corresponding monitoring method, to the voltage signal of display screen Driver Card
Function refinement has been carried out according to the property of electric signal, and has classified and carries out real-time monitoring, preliminary analysis and processing, to realize to event
Barrier problem judged and detected, to avoid or improve adverse effect caused by liquid crystal display failure.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, essence of the invention is not being departed from
In the case where mind and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a kind of display screen monitors system, the display screen monitoring system is for being monitored display screen, the display screen packet
It includes for the sequential control circuit and source electrode drive circuit for each pixel conversion signal, which is characterized in that the display screen
Monitoring system includes exciting unit, acquisition unit, query unit and judging unit, in which:
The exciting unit is set to the input terminal of the sequential control circuit, for apply include setting signal excitation
Source, the driving source enter the sequential control circuit；
The acquisition unit is set to the output end of the source electrode drive circuit, for acquiring through the sequential control circuit and
Monitoring signals that source electrode drive circuit is handled, being converted by the driving source, and the monitoring signals are sent to the inquiry
Unit；
The query unit prestores response signal compatible with picture signal, for according to setting signal inquiry pair
The response signal answered；
The judging unit for reception and the monitoring signals and the response signal, and determines according to comparison result
Whether the working condition of the display screen is normal；
Wherein, for each pixel, the driving source has the test picture with the dot structure same color of the display screen
Face signal, the test pictures signal are three primary colors data or four color data；
The driving source includes the picture signal that can be used to that pixel described in D row to be driven to be shown, the test pictures signal
With described image signal successively by being advanced into the sequential control circuit, in which: D is natural number, and D≤6.
2. display screen according to claim 1 monitors system, which is characterized in that the output end of the sequential control circuit with
At least two source electrode drive circuits are connected, and the test pictures signal is entered different source electrodes by column split from described image signal
Driving circuit；
The judging unit receives the homochromy data after at least two source electrode drive circuit conversions, compares two source electrodes
The difference of the homochromy data of driving circuit, and determine according to the difference of homochromy data and the size of given threshold the work of the display screen
Whether state is normal.
3. display screen according to claim 1 monitors system, which is characterized in that according to sequential control circuit output signal class
The difference of type, the query unit include at least one of voltage module, gamma transformation module and tfi module, in which:
The voltage module prestores response signal compatible with voltage in described image signal, for according to the setting
Signal inquires the corresponding response signal relevant to voltage；
The gamma transformation module prestores response signal compatible with tone in described image signal, for according to
Setting signal inquires the corresponding response signal relevant to tone；
The tfi module prestores response signal compatible with timing in described image signal, for according to the setting
Signal inquires the corresponding response signal relevant to timing.
4. display screen according to claim 1-3 monitors system, which is characterized in that the test pictures signal with
Described image signal enters the sequential control circuit by same input interface, and the input interface is LVDS interface；And
The monitoring signals and described image signal after sequential control circuit conversion pass through described in the output of same output interface
Sequential control circuit, the output interface are mini-LVDS interface.
5. a kind of display screen monitoring method, which is characterized in that comprising steps of
Apply driving source, the driving source includes setting signal, and the test pictures signal in the setting signal and image are believed
Number successively by being advanced into sequential control circuit；
Acquisition is through the sequential control circuit and monitoring signals that source electrode drive circuit is handled, being converted by the driving source；
Corresponding response signal is inquired according to the setting signal；
It receives and the monitoring signals and the response signal, and determines the work shape of the display screen according to comparison result
Whether state is normal.
6. display screen monitoring method according to claim 5, which is characterized in that be directed to each pixel, the driving source
Test pictures signal including the dot structure same color with the display screen, the test pictures signal are three primary colors data
Or four color data；
The driving source includes the picture signal that can be used to that pixel described in D row to be driven to be shown, the test pictures signal
With described image signal successively by being advanced into the sequential control circuit, in which: D is natural number, and D≤6.
7. display screen monitoring method according to claim 5, which is characterized in that
The output time at the beginning of the monitoring signals of the driving source conversion, earlier than for driving display screen setting area
The D horizontal-scanning interval of the picture signal of the first row pixel in domain；
Alternatively, including the monitoring signals of the driving source conversion of setting signal, and then for driving the display screen to set
The picture signal output for determining the last one pixel in region, and continues D horizontal-scanning interval, in which: D is natural number, and D
≤6。
8. display screen monitoring method according to claim 5, which is characterized in that the display screen includes and the timing control
At least two connected source electrode drive circuits of the output end of circuit processed, the test pictures signal and described image signal are by column point
Group enters different source electrode drive circuits；
The homochromy data for receiving at least two source electrode drive circuits compare the homochromy data of two source electrode drive circuits
Difference, and determine whether the working condition of the display screen normal according to the difference of homochromy data and the size of given threshold.
9. display screen monitoring method according to claim 5, which is characterized in that according to sequential control circuit output signal class
The difference of type prestores at least one of following information:
Response signal compatible with voltage in described image signal is prestored, corresponding and voltage is inquired according to the setting signal
The relevant response signal；
Response signal compatible with tone in described image signal is prestored, corresponding and tone is inquired according to the setting signal
The relevant response signal；
Response signal compatible with timing in described image signal is prestored, corresponding and timing is inquired according to the setting signal
The relevant response signal.
10. according to the described in any item display screen monitoring methods of claim 5-9, which is characterized in that the test pictures signal
The sequential control circuit is entered by same input interface with described image signal, the input interface is LVDS interface；With
And the monitoring signals after sequential control circuit conversion export institute by same output interface with described image signal
Sequential control circuit is stated, the output interface is mini-LVDS interface.
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| JP6876398B2 (en) * | 2016-09-28 | 2021-05-26 | ラピスセミコンダクタ株式会社 | Detection circuit |
| CN107369420B (en) * | 2017-08-11 | 2020-12-18 | 京东方科技集团股份有限公司 | Method, device and system for controlling image display |
| CN108055512A (en) * | 2017-12-30 | 2018-05-18 | 中煤科工集团上海有限公司 | Mating long distance tunnel continuous conveyor system monitoring and control device after a kind of shield |
| CN109448645B (en) | 2018-10-30 | 2020-12-18 | 惠科股份有限公司 | Signal adjusting circuit and method and display device |
| CN109814826A (en) * | 2019-01-25 | 2019-05-28 | 易虎网科技(芜湖)有限公司 | A kind of netcast monitoring system of mosaic screen |
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