CN106324420B - A kind of display fault detection method - Google Patents
A kind of display fault detection method Download PDFInfo
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- CN106324420B CN106324420B CN201610708845.5A CN201610708845A CN106324420B CN 106324420 B CN106324420 B CN 106324420B CN 201610708845 A CN201610708845 A CN 201610708845A CN 106324420 B CN106324420 B CN 106324420B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
- G01R31/67—Testing the correctness of wire connections in electric apparatus or circuits
Abstract
The invention discloses a kind of display fault detection methods, comprising: stores identical detection data sequence at mainboard end and display screen end in advance, the detection data sequence includes the detection data for detecting several times；The mainboard end sends the detection data to the display screen end according to detection order, so that the display screen end receives data by winding displacement, and compares the detection data that the data and the display screen end prestore to obtain comparing result；The mainboard end receives the response message that the display screen end returns, and records the turnaround time for receiving the response message；The response message includes the comparing result；The mainboard end detects whether to receive response message, the turnaround time and the comparing result, the type of diagnosis display failure several times according to described.Technical solution of the present invention can detect automatically after the power-up, reduce human cost and improve testing efficiency.
Description
Technical field
The present invention relates to vehicle electronics the field of test technology, more particularly to a kind of display fault detection method.
Background technique
Winding displacement, also referred to as flexible circuit board define line sequence, line color, wire size using different rules in different industries
Deng for the data transmission between module.The typical application scenarios of one of winding displacement are exactly the master for being connected to in-vehicle electronic system
Between plate and display screen, for mainboard and display screen progress protocol communication and the transmission for showing data.Other application scene is also
It is connect including mobile terminal such as cell phone mainboard with display screen, the connection such as computer main board and hard disk.
The crimping work of in-vehicle electronic system or mobile terminal in traditional technology, cable terminal may be by by hand Lai complete
At just having that winding displacement open circuit occurs in probability, winding displacement connection error (as misplace), cable terminal poor contact are asked in process of production
Topic, additionally there are some problems due to display screen itself aging etc., can all cause to show failure, such as blue screen, blank screen, no
Phenomena such as display, display mistake.
In process of producing product, display failure must be tested, the possible cause for causing failure is arranged
It looks into.In traditional technology, test still realized by manually, as previously mentioned, cause display failure the reason of be it is more complicated,
The problem of the problem of the problem of may be display screen end, mainboard end or winding displacement, here only by taking the problem of checking winding displacement as an example, one
As using tool (predominantly oscillograph) by detect mainboard end and the data that display screen end sends and receives it is whether consistent, to sentence
Whether disconnected winding displacement connection is problematic, this just needs to expend many manpowers, and testing efficiency is not high.
Summary of the invention
Based on this, it is necessary to a kind of display fault detection method is provided, can be detected automatically after the power-up, reduce manpower at
This simultaneously improves testing efficiency.
A kind of display fault detection method, method include:
Identical detection data sequence is stored at mainboard end and display screen end in advance, the detection data sequence includes to be used for
The detection data detected several times；
The mainboard end sends the detection data to the display screen end according to detection order, for the display screen end
Data are received by winding displacement, and the detection data that the data and the display screen end prestore is compared to obtain comparison knot
Fruit；
The mainboard end receives the response message that the display screen end returns, and records and receive returning for the response message
The multiple time；The response message includes the comparing result；
The mainboard end detects whether to receive several times response message, turnaround time and described right according to described
Than as a result, diagnosis shows the type of failure；The type of the display failure includes: winding displacement open circuit, display screen exception, winding displacement connection
Mistake, cable terminal poor contact, winding displacement connection are normal.
Further, the mainboard end detects whether to receive response message, the turnaround time several times according to described
And the comparing result, the type of diagnosis display failure, comprising:
In the detection several times, disappear if the mainboard end does not receive response in preset time section (0,5T)
Breath, then the type for diagnosing display failure is winding displacement open circuit.
Further, the mainboard end detects whether to receive response message, the turnaround time several times according to described
And the comparing result, the type of diagnosis display failure, comprising:
In the detection several times, if the turnaround time between preset time section (T, 5T), then diagnosis is aobvious
The type for showing failure is that display screen is abnormal.
Further, the mainboard end detects whether to receive response message, the turnaround time several times according to described
And the comparing result, the type of diagnosis display failure, comprising:
In the detection several times, if the turnaround time between preset time section (0, T), and the comparison
Result is that comparison is inconsistent, then the type for diagnosing display failure is winding displacement connection error.
Further, the mainboard end detects whether to receive response message, the turnaround time several times according to described
And the comparing result, the type of diagnosis display failure, comprising:
In the detection several times, if the turnaround time between preset time section (0, T), and several times
Comparing result contain simultaneously comparison unanimously and compare it is inconsistent, then diagnose display failure type be cable terminal contact not
It is good.
Further, the mainboard end detects whether to receive response message, the turnaround time several times according to described
And the comparing result, the type of diagnosis display failure, comprising:
In the detection several times, if the turnaround time between preset time section (0, T), and several times
Comparing result is that comparison is consistent, then confirms that winding displacement connection is normal.
Further, the mainboard end detects whether to receive response message, the turnaround time several times according to described
And the comparing result, the type of diagnosis display failure, comprising:
In the detection several times, the testing result whether the mainboard end receives response message is inconsistent, or
Between preset time section (0, T) or (T, 5T) when the turnaround time difference, then first determination detects corresponding each time
It temporarily shows fault type, then the interim display fault type of highest priority is asserted to the class of the display failure finally detected
Type.
Further, the priority orders of the interim display fault type are as follows:
Cable terminal poor contact > winding displacement connection error > display screen exception > winding displacement open circuit > winding displacement connection is normal.
Further, T=100ms.
Further, the method also includes: the mainboard ends carries out sound or light to user according to the type of display failure
The prompt of signal.
Above-mentioned display fault detection method stores identical detection data sequence at mainboard end and display screen end in advance,
Detected several times by mainboard end and display screen end, between transmit detection data and with pre-stored data compare, by mainboard end
According to detecting whether to receive response message, turnaround time and comparing result several times, the type of diagnosis display failure is compared
It detects by artificial in traditional technology, reduce cost of labor and improves detection efficiency.
Detailed description of the invention
Fig. 1 is the flow diagram of the display fault detection method in one embodiment；
Fig. 2 is the block architecture diagram of the display fault detection method application scenarios in one embodiment；
Fig. 3 is the testing process schematic diagram of the display fault detection method in one embodiment.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Referring to Fig. 1, a kind of display fault detection method is provided in one embodiment, and method includes:
Step 101, identical detection data sequence is stored at mainboard end and display screen end in advance, detection data sequence includes
Detection data for detecting several times.
Step 102, mainboard end sends detection data to the display screen end according to detection order, so that display screen end passes through
Winding displacement compares the detection data that data and display screen end prestore to obtain comparing result to receive data.
Step 103, mainboard end receives the response message that display screen end returns, and records when receiving the reply of response message
Between；Response message includes comparing result.
Step 104, mainboard end is according to detecting whether to receive response message, turnaround time and comparing result several times,
The type of diagnosis display failure.The type of display failure includes: winding displacement open circuit, display screen exception, winding displacement connection error, winding displacement end
Sub- poor contact, winding displacement connection are normal.
More specifically, the situation of detection may be as follows:
In detection several times, if mainboard end does not receive response message in preset time section (0,5T), then examine
The type of disconnected display failure is winding displacement open circuit；
In detection several times, if turnaround time between preset time section (T, 5T), then diagnoses display failure
Type is that display screen is abnormal；
Several times detection in, if turnaround time between preset time section (0, T), and comparing result be comparison
Inconsistent, then the type for diagnosing display failure is winding displacement connection error；
In detection several times, if turnaround time between preset time section (0, T), and comparing result several times
Comparison is contained simultaneously unanimously and comparison is inconsistent, then the type for diagnosing display failure is cable terminal poor contact；
In the detection several times, if turnaround time between preset time section (0, T), and compares several times
Result is that comparison is consistent, then confirms that winding displacement connection is normal；
In detection several times, mainboard end whether receive response message testing result is inconsistent or turnaround time
Between preset time section (0, T) or (T, 5T) when different, then first determination detects corresponding interim display failure each time
Type, then the interim display fault type of highest priority is asserted to the type of the display failure finally detected.Interim display
The priority orders of fault type are as follows: cable terminal poor contact > winding displacement connection error > display screen exception > winding displacement open circuit > winding displacement
Connection is normal.
In the present embodiment, T=100ms.
Optionally, after the type that the mainboard end of this method is diagnosed to be display failure, the method also includes: mainboard end
The prompt of sound or light signal is carried out to user according to the type of display failure.
Above-mentioned display fault detection method stores identical detection data sequence at mainboard end and display screen end in advance,
Detected several times by mainboard end and display screen end, between transmit detection data and with pre-stored data compare, by mainboard end
According to detecting whether to receive response message, turnaround time and comparing result several times, the type of diagnosis display failure is compared
It detects by artificial in traditional technology, reduce cost of labor and improves detection efficiency.
It referring to figs. 2 and 3, is an application scenarios of the embodiment of the present invention.Specifically, the system in Fig. 2, mainboard end
Hardware device includes master controller and cue module.Display screen end is specially display module in Fig. 2, wherein containing communication module.
Cue module is attached by channel 3 (I2S) with master controller, and major function is reflection master controller and display module
Connection status.Master controller is connect by winding displacement with display module.Contain communication module in display module, major function is and master
Controller is communicated, and response message and comparing result are transmitted.Winding displacement specifically include that communication protocol transmission channel (I2C, SPI,
The common communications such as UART agreement), i.e., master controller sends data, display module receives data channel 1, and master controller receives number
Data channel 2, Data transmission channel 4, Power supplying channels 5 are sent according to, display module.
Fig. 3 is the corresponding detection logic chart of Fig. 2 system, and testing mechanism is by logical between master controller and communication module
Letter is realized.
After powering on start-up operation, master controller can send both sides' agreement by communication module of the channel 1 into display module
Data A, B, C (at least need detection twice, in the present embodiment for detecting three times) with particular sequence, in 5T (T=
100ms) in time, if the communication module in display module is replied not over channel 2 to master controller, master control
Device processed will be considered that winding displacement does not connect and can send again the data of above-mentioned particular sequence, if all do not received three times continuously logical
Believe the reply of module, then master controller can send to instruct by channel 3 to cue module allows it to issue alarm sound: winding displacement is disconnected
Road；
Master controller has received the reply of communication module within the 5T time, then just continue to judge the received time whether
In T.If master controller will be considered that screen abnormal (screen has damage) and can send above-mentioned particular sequence again not in T
Data, if the turnaround time for continuously receiving communication module three times is both greater than T, master controller can be by channel 3 to prompt
Module, which sends instruction, allows it to issue alarm sound: display screen is abnormal；
Master controller has received the reply of communication module in T time, then just continuing to judge received particular sequence number
According to whether correct.If correct, master controller will be considered that winding displacement connection is normal and can send the data of particular sequence again,
If the data for the reply for continuously receiving communication module three times are all correct, master controller can be by channel 3 to cue module
Sending instruction allows it not make a sound；If incorrect, master controller will be considered that winding displacement connection error and can send again
The data of particular sequence, if continuously receiving data all mistakes of the reply of communication module three times, master controller can pass through
Channel 3, which sends instruction to cue module, allows it to give a warning sound: winding displacement connection error；If continuously receiving communication mould three times
The data of the reply of block have correctly also vicious, then master controller will be considered that winding displacement connection poor contact and by channel 3
Sending instruction to cue module allows it to give a warning sound: cable terminal poor contact；
If the result judged three times is different, master controller can determine failure by priority, and priority height is:
Winding displacement connect poor contact > winding displacement connection error > screen exception > winding displacement it is not connected > winding displacement connects normally；The height of priority be by
Depending on detecting logic according to Fig. 3, in the detection of data three times, cue module by logic walk it is farthest once alarm, and
Winding displacement connection normally then need three times equal regular prompt module will not just give a warning, therefore its priority is minimum.Such as: work as master
When the data that controller receives have abnormal winding displacement connection error, screen, winding displacement connection normal three kinds of situations, pass through the height of priority
Low, master controller cue module, which sends instruction to cue module by channel 3, allows it to give a warning sound: winding displacement connection error；
It judges by accident in order to prevent, it is scheduled with spy which periodically can send both sides to the communication module of display module
Data A, B, C of sequencing column, continuously detect the state of display module, to realize screen connection self-test.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of display fault detection method, which is characterized in that the described method includes:
Identical detection data sequence is stored at mainboard end and display screen end in advance, the detection data sequence includes for several
The detection data of secondary detection；
The mainboard end sends the detection data to the display screen end according to detection order, so that the display screen end passes through
Winding displacement compares the detection data that the data and the display screen end prestore to obtain comparing result to receive data；
The mainboard end receives the response message that the display screen end returns, and records when receiving the reply of the response message
Between；The response message includes the comparing result；
The mainboard end detects whether that receiving response message, the turnaround time and the comparison ties according to described several times
Fruit, the type of diagnosis display failure；The type of the display failure includes: winding displacement open circuit, display screen is abnormal, winding displacement connection is wrong
Mistake, cable terminal poor contact, winding displacement connection are normal.
2. the method according to claim 1, wherein the mainboard end detects whether to receive several times according to described
To response message, the turnaround time and the comparing result, the type of diagnosis display failure, comprising:
In the detection several times, if the mainboard end does not receive response message in preset time section (0,5T),
The type for then diagnosing display failure is winding displacement open circuit.
3. the method according to claim 1, wherein the mainboard end detects whether to receive several times according to described
To response message, the turnaround time and the comparing result, the type of diagnosis display failure, comprising:
In the detection several times, if the turnaround time between preset time section (T, 5T), then diagnoses display event
The type of barrier is that display screen is abnormal.
4. the method according to claim 1, wherein the mainboard end detects whether to receive several times according to described
To response message, the turnaround time and the comparing result, the type of diagnosis display failure, comprising:
In the detection several times, if the turnaround time between preset time section (0, T), and the comparing result
It is that comparison is inconsistent, then the type for diagnosing display failure is winding displacement connection error.
5. the method according to claim 1, wherein the mainboard end detects whether to receive several times according to described
To response message, the turnaround time and the comparing result, the type of diagnosis display failure, comprising:
In the detection several times, if the turnaround time between preset time section (0, T), and compares several times
As a result comparison is contained simultaneously unanimously and comparison is inconsistent, then the type for diagnosing display failure is cable terminal poor contact.
6. the method according to claim 1, wherein the mainboard end detects whether to receive several times according to described
To response message, the turnaround time and the comparing result, the type of diagnosis display failure, comprising:
In the detection several times, if the turnaround time between preset time section (0, T), and compares several times
Result is that comparison is consistent, then confirms that winding displacement connection is normal.
7. the method according to claim 1, wherein the mainboard end detects whether to receive several times according to described
To response message, the turnaround time and the comparing result, the type of diagnosis display failure, comprising:
In the detection several times, the testing result whether the mainboard end receives response message is inconsistent or described
Between preset time section (0, T) or (T, 5T) when turnaround time difference, then first determination detects corresponding interim each time
It shows fault type, then the interim display fault type of highest priority is asserted to the type of the display failure finally detected.
8. the method according to the description of claim 7 is characterized in that the priority orders of the interim display fault type are as follows:
Cable terminal poor contact > winding displacement connection error > display screen exception > winding displacement open circuit > winding displacement connection is normal.
9. according to the described in any item methods of claim 2 to 7, which is characterized in that T=100ms.
10. the method according to claim 1, wherein the method also includes: the mainboard ends according to display therefore
The type of barrier carries out the prompt of sound or light signal to user.
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| CN201610708845.5A CN106324420B (en) | 2016-08-23 | 2016-08-23 | A kind of display fault detection method |
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| CN201610708845.5A CN106324420B (en) | 2016-08-23 | 2016-08-23 | A kind of display fault detection method |
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| CN106324420B true CN106324420B (en) | 2019-01-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108513084B (en) * | 2018-06-29 | 2020-12-04 | 海信视像科技股份有限公司 | Liquid crystal display television circuit system and liquid crystal display television |
| CN111596197A (en) * | 2020-05-18 | 2020-08-28 | 内蒙古创维智能科技有限公司 | Display mainboard testing device |
| CN115359748B (en) * | 2022-10-20 | 2023-02-10 | 武汉海微科技有限公司 | Yellow screen detection circuit and yellow screen detection method |
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| CN104133309A (en) * | 2014-08-13 | 2014-11-05 | 信利半导体有限公司 | System and method for detecting LCD module |
| CN104506847A (en) * | 2014-11-24 | 2015-04-08 | 小米科技有限责任公司 | Method and device for detecting display fault |
| CN105261329A (en) * | 2015-11-26 | 2016-01-20 | 西安诺瓦电子科技有限公司 | Multi-LED display module management method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11133087A (en) * | 1997-10-24 | 1999-05-21 | Yazaki Corp | Wiring conduction inspection device |
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| CN203870175U (en) * | 2014-04-21 | 2014-10-08 | 深圳安博电子有限公司 | Wire row detecting instrument |
| CN104133309A (en) * | 2014-08-13 | 2014-11-05 | 信利半导体有限公司 | System and method for detecting LCD module |
| CN104506847A (en) * | 2014-11-24 | 2015-04-08 | 小米科技有限责任公司 | Method and device for detecting display fault |
| CN105261329A (en) * | 2015-11-26 | 2016-01-20 | 西安诺瓦电子科技有限公司 | Multi-LED display module management method |
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