CN106324420A - Display fault detection method - Google Patents
Display fault detection method Download PDFInfo
- Publication number
- CN106324420A CN106324420A CN201610708845.5A CN201610708845A CN106324420A CN 106324420 A CN106324420 A CN 106324420A CN 201610708845 A CN201610708845 A CN 201610708845A CN 106324420 A CN106324420 A CN 106324420A
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- detection
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- several times
- fault
- display
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Classifications
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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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing And Monitoring For Control Systems (AREA)
- Alarm Systems (AREA)
Abstract
The invention discloses a display fault detection method comprising the following steps: a same detection data sequence is pre-stored at a motherboard side and at a display side, wherein the detection data sequence contains detection data for a plurality of times of detection; the motherboard side sends the detection data to the display side according to the detection order, and the display side receives data through a flat cable and compares the data with the detection data pre-stored at the display side to get a comparison result; the motherboard side receives a reply message returned by the display side, and records the reply time when the reply message is received, wherein the reply message contains the comparison result; and the motherboard side diagnoses the type of a display fault according to whether a reply message is received for the plurality of times of detection, the reply time and the comparison result. According to the technical scheme of the invention, detection can be carried out automatically after powering-on, the manpower cost can be reduced, and the test efficiency can be improved.
Description
Technical field
The present invention relates to vehicle electronics technical field of measurement and test, particularly relate to a kind of display fault detection method.
Background technology
Winding displacement, also referred to as flexible circuit board, use different rules to define line sequence, line color, wire size in different industries
Deng, the data transmission between module.One typical application scenarios of winding displacement is just attached to the master of in-vehicle electronic system
Between plate and display screen, carry out the transmission of protocol communication and video data for mainboard and display screen.Other application scenarios is also
Be connected with display screen including mobile terminal such as cell phone mainboard, computer main board is connected with hard disk etc..
In-vehicle electronic system in conventional art or mobile terminal, the line ball work of cable terminal may be by having come by hand
Become, the most just have probability that winding displacement open circuit, winding displacement connection error (as dislocation), the asking of cable terminal loose contact occur
, additionally there are some problems due to reasons such as display screen itself are aging in topic, all can cause display fault, such as blue screen, blank screen, no
The phenomenons such as display, display mistake.
In process of producing product, display fault must be tested, the possible cause causing fault is arranged
Look into.In conventional art, test is still by manually realizing, as it was previously stated, the reason causing display fault is more complicated,
It is probably the problem of display screen end, the problem of mainboard end or the problem of winding displacement, the most only as a example by the problem of investigation winding displacement, one
As utilize instrument (predominantly oscillograph) to send the most consistent with the data received by detection mainboard end and display screen end, sentence
Disconnected winding displacement connects the most problematic, and this is accomplished by expending a lot of manpowers, and testing efficiency is the highest.
Summary of the invention
Based on this, it is necessary to provide one display fault detection method, it is possible to the most automatically detect, reduce manpower and become
This also improves testing efficiency.
A kind of display fault detection method, method includes:
In advance at the detection data sequence that the storage of mainboard end and display screen end is identical, described detection data sequence comprise for
The detection data detected several times；
Described mainboard end sends described detection data according to detection order to described display screen end, for described display screen end
Receive data by winding displacement, and the detection data that described data and described display screen end prestore are carried out contrast obtain contrast knot
Really；
Described mainboard end receives the response message that described display screen end returns, and record receives returning of described response message
The multiple time；Described response message includes described comparing result；
Described mainboard end detects whether to receive response message, described turnaround time and described right several times according to described
Ratio result, the type of diagnosis display fault；The type of described display fault includes: winding displacement open circuit, display screen exception, winding displacement connect
Mistake, cable terminal loose contact, winding displacement connect normal.
Further, described mainboard end receives response message, described turnaround time according to described detecting whether several times
And described comparing result, the type of diagnosis display fault, including:
In described detection several times, disappear if described mainboard end does not all receive response in Preset Time interval (0,5T)
Breath, then the type of diagnosis display fault is winding displacement open circuit.
Further, described mainboard end receives response message, described turnaround time according to described detecting whether several times
And described comparing result, the type of diagnosis display fault, including:
In described detection several times, if described turnaround time is all between Preset Time interval (T, 5T), then diagnosis is aobvious
Show that the type of fault is that display screen is abnormal.
Further, described mainboard end receives response message, described turnaround time according to described detecting whether several times
And described comparing result, the type of diagnosis display fault, including:
In described detection several times, if described turnaround time is all between Preset Time interval (0, T), and described contrast
It is inconsistent that result is contrast, then the type of diagnosis display fault is winding displacement connection error.
Further, described mainboard end receives response message, described turnaround time according to described detecting whether several times
And described comparing result, the type of diagnosis display fault, including:
In described detection several times, if described turnaround time is all between Preset Time interval (0, T), and several times
Comparing result simultaneously contain contrast one make peace contrast inconsistent, then diagnosis display fault type be cable terminal contact not
Good.
Further, described mainboard end receives response message, described turnaround time according to described detecting whether several times
And described comparing result, the type of diagnosis display fault, including:
In described detection several times, if described turnaround time is all between Preset Time interval (0, T), and several times
It is consistent that comparing result is contrast, then confirm that winding displacement connects normal.
Further, described mainboard end receives response message, described turnaround time according to described detecting whether several times
And described comparing result, the type of diagnosis display fault, including:
In described detection several times, the testing result whether described mainboard end receives response message is inconsistent, or
Between Preset Time interval (0, T) or (T, 5T) during described difference turnaround time, the most first determine detection correspondence each time
Show fault type temporarily, the more interim display fault type of limit priority is asserted the class of the display fault of final detection
Type.
Further, the priority orders of described interim display fault type is:
Cable terminal loose contact > winding displacement connection error > display screen exception > winding displacement open circuit > winding displacement connection is normally.
Further, T=100ms.
Further, described method also includes: described mainboard end carries out sound or light according to the type of display fault to user
The prompting of signal.
Above-mentioned display fault detection method, in advance at the detection data sequence that mainboard end is identical with the storage of display screen end,
Detected several times by mainboard end and display screen end, between transmission detection data and with pre-stored data contrast, by mainboard end
According to detecting whether to receive response message, turnaround time and comparing result several times, the type of diagnosis display fault, compare
Rely in conventional art and manually detect, reduce cost of labor and improve detection efficiency.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the display fault detection method in an embodiment；
Fig. 2 is the block architecture diagram of the display fault detection method application scenarios in an embodiment；
Fig. 3 is the testing process schematic diagram of the display fault detection method in an embodiment.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, right
The present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, and
It is not used in the restriction present invention.
Seeing Fig. 1, provide a kind of display fault detection method in one embodiment, method includes:
Step 101, in advance at the detection data sequence that mainboard end is identical with the storage of display screen end, detection data sequence comprises
For the detection data detected several times.
Step 102, mainboard end sends detection data according to detection order to described display screen end, passes through for display screen end
Winding displacement receives data, and the detection data that data and display screen end prestore are carried out contrast obtains comparing result.
Step 103, mainboard end receives the response message that display screen end returns, and when recording the reply receiving response message
Between；Response message includes comparing result.
Step 104, mainboard end receives response message, turnaround time and comparing result according to detecting whether several times,
The type of diagnosis display fault.The type of display fault includes: winding displacement open circuit, display screen exception, winding displacement connection error, winding displacement end
Sub-loose contact, winding displacement connect normal.
More specifically, the situation of detection may be as follows:
In detection several times, if mainboard end does not all receive response message in Preset Time interval (0,5T), then examine
The type of disconnected display fault is winding displacement open circuit；
In detection several times, if turnaround time is all between Preset Time interval (T, 5T), then diagnosis shows fault
Type is that display screen is abnormal；
In detection several times, if turnaround time is all between Preset Time interval (0, T), and comparing result is contrast
Inconsistent, then the type of diagnosis display fault is winding displacement connection error；
In detection several times, if turnaround time is all between Preset Time interval (0, T), and comparing result several times
Simultaneously contain contrast one make peace contrast inconsistent, then diagnosis display fault type be cable terminal loose contact；
In described detection several times, if turnaround time is all between Preset Time interval (0, T), and contrast several times
It is consistent that result is contrast, then confirm that winding displacement connects normal；
In detection several times, the testing result whether mainboard end receives response message is inconsistent, or turnaround time
Between Preset Time interval (0, T) or (T, 5T) time different, the most first determine detection correspondence each time shows fault temporarily
Type, the more interim display fault type of limit priority is asserted the type of the display fault of final detection.Interim display
The priority orders of fault type is: cable terminal loose contact > winding displacement connection error > display screen exception > winding displacement open circuit > winding displacement
Connect normal.
In the present embodiment, T=100ms.
Optionally, after the mainboard end of this method is diagnosed to be the type of display fault, described method also includes: mainboard end
Type according to display fault carries out the prompting of sound or light signal to user.
Above-mentioned display fault detection method, in advance at the detection data sequence that mainboard end is identical with the storage of display screen end,
Detected several times by mainboard end and display screen end, between transmission detection data and with pre-stored data contrast, by mainboard end
According to detecting whether to receive response message, turnaround time and comparing result several times, the type of diagnosis display fault, compare
Rely in conventional art and manually detect, reduce cost of labor and improve detection efficiency.
See Fig. 2 and Fig. 3, for an application scenarios of the embodiment of the present invention.Specifically, the system in Fig. 2, mainboard end
Hardware device includes master controller and reminding module.Display screen end is specially display module in Fig. 2, wherein contains communication module.
Reminding module is attached with master controller by passage 3 (I2S), and its major function is reflection master controller and display module
Connection status.Master controller is connected with display module by winding displacement.Containing communication module in display module, major function is and master
Controller communicates, transmission response message and comparing result.Winding displacement specifically include that communication protocol transmission channel (I2C, SPI,
The common communications agreements such as UART), 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 is sent according to, display module.
Fig. 3 is the detection logic chart that Fig. 2 system is corresponding, and testing mechanism is by leading between master controller and communication module
Letter realizes.
Powering on after starting working, master controller can send both sides by the passage 1 communication module in display module and arrange
Have data A of particular sequence, B, C (at least need to detect twice, in the present embodiment by three times detection as a example by), at 5T (T=
100ms) in time, if the communication module in display module is replied to master controller not over passage 2, then master control
Device processed will be considered that winding displacement does not connect and can again send the data of above-mentioned particular sequence, if continuous three times do not receive logical
The reply of letter module, then master controller can allow it send alarm sound by passage 3 to reminding module transmission instruction: winding displacement breaks
Road；
Within the 5T time, master controller have received the reply of communication module, then just continues to judge that whether the time of reception exist
In T.If not in T, then master controller will be considered that screen abnormal (screen has damage) and can again send above-mentioned particular sequence
Data, if being both greater than T the turnaround time receiving communication module continuous three times, then master controller can be by passage 3 to prompting
Module sends instruction allows it send alarm sound: display screen is abnormal；
In T time, master controller have received the reply of communication module, then just continues the particular sequence number judging to receive
According to the most correct.If it is correct, then master controller will be considered that winding displacement connects data that are normal and that can again send particular sequence,
If the data of the reply that continuous three times receive communication module are all correct, then master controller can be by passage 3 to reminding module
Sending instruction allows it not send sound；If it is incorrect, then master controller will be considered that winding displacement connection error and can again send
The data of particular sequence, if data all mistakes of the reply receiving communication module continuous three times, then master controller can pass through
Passage 3 sends instruction to reminding module allows it give a warning sound: winding displacement connection error；If continuous three times receive communication mould
The data of the reply of block have correct the most vicious, then master controller will be considered that winding displacement connects loose contact and passes through passage 3
Sending instruction to reminding module allows it give a warning sound: cable terminal loose contact；
If the result that three times judge is different, by priority, master controller can determine that fault, priority height are:
Winding displacement connects loose contact > winding displacement connection error > screen is abnormal > winding displacement is not connected with > winding displacement connects normal；The height of priority be by
Depending on detecting logic according to Fig. 3, in the detection of three secondary data, farthest once the reporting to the police that reminding module is walked by logic, and
Winding displacement connects normally then needs three equal regular prompt modules just will not give a warning, and therefore its priority is minimum.Such as: work as master
When the data that controller receives have winding displacement connection error, screen exception, winding displacement to connect normal three kinds of situations, by the height of priority
Low, master controller reminding module sends instruction by passage 3 to reminding module allows it give a warning sound: winding displacement connection error；
In order to prevent erroneous judgement, this function can periodically to the communication module of display module send both sides predetermined there is spy
Data A of fixed sequence, B, C, continuously detect the state of display module, thus realize screen and connect Autonomous test.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed, but also
Therefore the restriction to the scope of the claims of the present invention can not 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, it is also possible to make some deformation and improvement, these broadly fall into the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a display fault detection method, it is characterised in that described method includes:
In advance at the detection data sequence that mainboard end is identical with the storage of display screen end, described detection data sequence comprises for some
The detection data of secondary detection；
Described mainboard end sends described detection data according to detection order to described display screen end, passes through for described display screen end
Winding displacement receives data, and the detection data that described data and described display screen end prestore are carried out contrast obtains comparing result；
Described mainboard end receives the response message that described display screen end returns, and when recording the reply receiving described response message
Between；Described response message includes described comparing result；
Described mainboard end receives response message, described turnaround time and described contrast knot according to described detecting whether several times
Really, the type of diagnosis display fault；The type of described display fault includes: winding displacement open circuit, display screen exception, winding displacement connect mistake
Mistake, cable terminal loose contact, winding displacement connect normal.
Method the most according to claim 1, it is characterised in that described mainboard end receives according to described detecting whether several times
To response message, described turnaround time and described comparing result, diagnosis shows the type of fault, including:
In described detection several times, if described mainboard end does not all receive response message in Preset Time interval (0,5T),
Then the type of diagnosis display fault is winding displacement open circuit.
Method the most according to claim 1, it is characterised in that described mainboard end receives according to described detecting whether several times
To response message, described turnaround time and described comparing result, diagnosis shows the type of fault, including:
In described detection several times, if described turnaround time is all between Preset Time interval (T, 5T), then diagnosis display event
The type of barrier is that display screen is abnormal.
Method the most according to claim 1, it is characterised in that described mainboard end receives according to described detecting whether several times
To response message, described turnaround time and described comparing result, diagnosis shows the type of fault, including:
In described detection several times, if described turnaround time is all between Preset Time interval (0, T), and described comparing result
Be contrast inconsistent, then the type of diagnosis display fault is winding displacement connection error.
Method the most according to claim 1, it is characterised in that described mainboard end receives according to described detecting whether several times
To response message, described turnaround time and described comparing result, diagnosis shows the type of fault, including:
In described detection several times, if described turnaround time is all between Preset Time interval (0, T), and contrast several times
Result simultaneously contain contrast one make peace contrast inconsistent, then diagnosis display fault type be cable terminal loose contact.
Method the most according to claim 1, it is characterised in that described mainboard end receives according to described detecting whether several times
To response message, described turnaround time and described comparing result, diagnosis shows the type of fault, including:
In described detection several times, if described turnaround time is all between Preset Time interval (0, T), and contrast several times
It is consistent that result is contrast, then confirm that winding displacement connects normal.
Method the most according to claim 1, it is characterised in that described mainboard end receives according to described detecting whether several times
To response message, described turnaround time and described comparing result, diagnosis shows the type of fault, including:
In described detection several times, the testing result whether described mainboard end receives response message is inconsistent or described
Between Preset Time interval (0, T) or (T, 5T) during difference turnaround time, the most first determine and detect the interim of correspondence each time
Display fault type, the more interim display fault type of limit priority is asserted the type of the display fault of final detection.
Method the most according to claim 7, it is characterised in that the priority orders of described interim display fault type is:
Cable terminal loose contact > winding displacement connection error > display screen exception > winding displacement open circuit > winding displacement connection is normally.
9. according to the method described in any one of claim 2 to 7, it is characterised in that T=100ms.
Method the most according to claim 1, it is characterised in that described method also includes: described mainboard end is according to display event
The type of barrier carries out the prompting of sound or light signal to user.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610708845.5A CN106324420B (en) | 2016-08-23 | 2016-08-23 | A kind of display fault detection method |
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| CN106324420A true CN106324420A (en) | 2017-01-11 |
| CN106324420B CN106324420B (en) | 2019-01-29 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108513084A (en) * | 2018-06-29 | 2018-09-07 | 青岛海信电器股份有限公司 | A kind of LCD TV circuit system and LCD TV |
| 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 |
| CN115359748A (en) * | 2022-10-20 | 2022-11-18 | 武汉海微科技有限公司 | Huang Bing detection circuit and Huang Bing detection method |
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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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| JPH11133087A (en) * | 1997-10-24 | 1999-05-21 | Yazaki Corp | Wiring conduction inspection device |
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108513084A (en) * | 2018-06-29 | 2018-09-07 | 青岛海信电器股份有限公司 | A kind of LCD TV circuit system and LCD TV |
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| 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 |
| CN115359748A (en) * | 2022-10-20 | 2022-11-18 | 武汉海微科技有限公司 | Huang Bing detection circuit and Huang Bing detection method |
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| CN106324420B (en) | 2019-01-29 |
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