CN111613160A - Method and system for judging display fault of LCD display screen - Google Patents
Method and system for judging display fault of LCD display screen Download PDFInfo
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- CN111613160A CN111613160A CN202010255734.XA CN202010255734A CN111613160A CN 111613160 A CN111613160 A CN 111613160A CN 202010255734 A CN202010255734 A CN 202010255734A CN 111613160 A CN111613160 A CN 111613160A
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- G—PHYSICS
- 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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/40—Scenes; Scene-specific elements in video content
Abstract
The invention discloses a method for judging display faults of an LCD display screen, which comprises the following steps: s1, displaying the original video by the LCD display screen; s2, acquiring display data of the LCD screen in the display process; s3, restoring the display data into a video to be analyzed; s4, comparing and analyzing the video to be analyzed and the original video, wherein if the comparison and analysis result is consistent, no display fault occurs on the LCD display screen, and if the comparison and analysis result is inconsistent, a display fault occurs on the LCD display screen; and S5, if the display fault occurs on the LCD display screen, generating fault information according to the comparison analysis result. The invention provides a method and a system for judging display faults of an LCD display screen, which can simply and quickly judge whether the LCD display screen has faults or not.
Description
Technical Field
The invention relates to the technical field of LCD display screens, in particular to a method and a system for judging display faults of an LCD display screen.
Background
In the use process of the current commercial multimedia display screen, no mechanism is provided for judging whether the screen is normal or not. In a large number of practical applications, for example subway trains, the screen is damaged, or shows unusually, can discover the trouble when needing artifical the inspection. The train is large in quantity, the train length is long, 8 screens are used in each train carriage, the inspection time of all trains is long after the inspection is finished, the workload of inspection personnel is large, the cost is high, the efficiency is low, and the timeliness is low. Or the navigation information screens used on the streets and in the shopping malls are large in quantity and long in distance, the routing inspection is also a very labor-consuming matter, and the fault display cannot be found in real time.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a method and a system for judging the display fault of an LCD display screen, which can simply and quickly judge whether the LCD display screen has the fault.
In order to achieve the purpose, the invention adopts the specific scheme that:
a method for judging display failure of an LCD display screen comprises the following steps:
s1, displaying the original video by the LCD display screen;
s2, acquiring display data of the LCD screen in the display process;
s3, restoring the display data into a video to be analyzed;
s4, comparing and analyzing the video to be analyzed and the original video, wherein if the comparison and analysis result is consistent, no display fault occurs on the LCD display screen, and if the comparison and analysis result is inconsistent, a display fault occurs on the LCD display screen;
and S5, if the display fault occurs on the LCD display screen, generating fault information according to the comparison analysis result.
Preferably, the specific method of S1 is:
s1.1, determining the refresh rate of the LCD display screen;
s1.2, converting the original video into an output frame through decoding according to the refresh rate of the LCD display screen;
and S1.3, the LCD display screen displays the output frames frame by frame.
Preferably, in S2, display data of the LCD screen during displaying is acquired through an LCD interface of the LCD screen.
Preferably, in S3, the decoder is used to restore the display data to the video to be parsed.
Preferably, the specific method of S4 is:
s4.1, converting the video to be analyzed into an analysis frame through decoding according to the refresh rate of the LCD display screen;
s4.2, comparing and analyzing the analysis frame and the output frame by frame;
and S4.3, if inconsistent pixel points do not appear in all results of the frame-by-frame comparison analysis, comparing the analysis results to be consistent, if the number of the inconsistent pixel points appearing in all results of the frame-by-frame comparison analysis does not exceed a preset number threshold, comparing the analysis results to be consistent, and if the number of the inconsistent pixel points appearing in all results of the frame-by-frame comparison analysis exceeds the preset number threshold, comparing the analysis results to be inconsistent.
Preferably, S4 further includes the steps of:
s4.4, determining coordinates of all inconsistent pixel points in the frame-by-frame comparison analysis result;
and S4.5, if the occurrence frequency of the pixel point of the same coordinate exceeds a preset frequency threshold, determining the pixel point as a fault pixel point, and if the occurrence frequency of the pixel point of the same coordinate does not exceed the preset frequency threshold, determining the pixel point as a suspicious pixel point.
Preferably, the failure information includes a determined failure portion composed of all the failed pixel points and a suspected failure portion determined by all the suspected pixel points.
Preferably, the method further comprises the following steps:
and S6, generating suggested maintenance information according to the fault information.
A display failure judgment system of an LCD display screen display failure judgment method comprises:
the reading connector is electrically connected with the LCD interface of the LCD display screen and is used for acquiring the display data;
the encoder is electrically connected with the reading connector and used for restoring the display data into a video to be analyzed;
and the cloud server is in communication connection with the decoder and the driving mechanism of the LCD display screen and is used for acquiring the original video and the video to be analyzed, comparing and analyzing the original video and the video to be analyzed and generating the fault information.
Preferably, the system further comprises a scheduling server, wherein the scheduling server is used for receiving the recommended maintenance information.
The method compares and analyzes the original video and the video actually played by the LCD display screen in a reverse analysis mode, and judges whether the LCD display screen is normally displayed or not according to the comparison and analysis result.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of a fault determination method of the present invention;
fig. 2 is a block diagram showing the configuration of the failure determination system of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 2, fig. 1 is a flow chart of a fault determination method according to the present invention, and fig. 2 is a block diagram of a fault determination system according to the present invention.
A method for judging display failure of LCD screen includes S1-S5.
And S1, displaying the original video by the LCD display screen.
And S2, acquiring display data of the LCD screen in the display process.
And S3, restoring the display data into the video to be analyzed.
And S4, comparing and analyzing the video to be analyzed with the original video, wherein if the comparison and analysis result is consistent, no display fault occurs on the LCD display screen, and if the comparison and analysis result is inconsistent, the display fault occurs on the LCD display screen.
And S5, if the display fault occurs on the LCD screen, generating fault information according to the comparison analysis result.
The method compares and analyzes the original video and the video actually played by the LCD display screen in a reverse analysis mode, and judges whether the LCD display screen is normally displayed or not according to the comparison and analysis result.
Further, specific methods of S1 are S1.1 to S1.3.
S1.1, determining the refresh rate of the LCD display screen.
And S1.2, converting the original video into an output frame through decoding according to the refresh rate of the LCD display screen.
And S1.3, the LCD display screen displays the output frames frame by frame.
Considering that the original video has a preset frame rate in the recording or processing process, and the refresh frequency of the LCD display screen is fixed, if the two are not matched, the comparison will interfere with the analysis process, resulting in a decrease in the accuracy of the result. For example, when the frame rate of the recording device is set to 144Hz and the refresh rate of the LCD display screen is 60Hz, the LCD display screen cannot display the original video at the frame rate of the original video, and the original video is processed according to the refresh rate of the LCD display screen in S1, so as to ensure the consistency between the original video and the original video, and further ensure the accuracy of the comparison analysis result.
Further, in S2, display data of the LCD panel during the displaying process is acquired through the LCD interface of the LCD panel. The LCD interface is a structure of the LCD display screen itself, and obtaining display data of the LCD display screen during the display process through the LCD interface is also a conventional technical means in the art, and is not described herein again.
Further, in S3, the display data is restored to the video to be parsed by the decoder. After the display data of the LCD display screen in the display process is acquired, the decoder can be used for quickly restoring the display data to obtain the video to be analyzed, the decoder can be selected according to the specific situation of the LCD interface, the method belongs to the conventional means in the field, and the method is not repeated herein.
Further, specific methods of S4 are S4.1 to S4.5.
And S4.1, converting the video to be analyzed into an analysis frame through decoding according to the refresh rate of the LCD display screen.
And S4.2, comparing and analyzing the analysis frame and the output frame by frame.
And S4.3, if inconsistent pixel points do not appear in all results of the frame-by-frame comparison analysis, comparing the analysis results to be consistent, if the number of the inconsistent pixel points appearing in all results of the frame-by-frame comparison analysis does not exceed a preset number threshold, comparing the analysis results to be consistent, and if the number of the inconsistent pixel points appearing in all results of the frame-by-frame comparison analysis exceeds the preset number threshold, comparing the analysis results to be inconsistent. Theoretically, if the LCD display screen has no fault, inconsistent pixel points should not exist in the comparison analysis result, but actually, the number threshold is set in consideration of the fact that the inconsistent pixel points are finally caused by errors when the display data is acquired, and when the number of the inconsistent pixel points is smaller than the number threshold, the inconsistent pixel points can be considered to be caused by errors or be actually failed, rather than being directly judged to be failed, so that the accuracy of the judgment result is improved.
Further, S4 also includes S4.4 to S4.5.
And S4.4, determining the coordinates of all inconsistent pixel points in the frame-by-frame comparison analysis result.
And S4.5, if the occurrence frequency of the pixel point of the same coordinate exceeds a preset frequency threshold, determining the pixel point as a fault pixel point, and if the occurrence frequency of the pixel point of the same coordinate does not exceed the preset frequency threshold, determining the pixel point as a suspicious pixel point. In S4.1 to S4.3, it can only be considered that inconsistent pixel points are generated due to errors or actually have a fault, and there is still a large probability of erroneous determination, so S4.4 and S4.5 are increased, and this part of inconsistent pixel points is further screened, so that maintenance personnel can make final determination.
Further, the fault information comprises a determined fault part consisting of all fault pixel points and a suspicious fault part determined by all suspicious pixel points. Where the suspected fault portion needs final confirmation by maintenance personnel.
Further, S6 is also included.
And S6, generating suggested maintenance information according to the fault information.
A display fault judgment system of an LCD display screen display fault judgment method comprises a reading connector, an encoder and a cloud server.
And the reading connector is electrically connected with the LCD interface of the LCD display screen and is used for acquiring display data.
And the encoder is electrically connected with the reading connector and is used for restoring the display data into a video to be analyzed.
And the cloud server is in communication connection with the decoder and the driving mechanism of the LCD display screen and is used for acquiring the original video and the video to be analyzed, comparing and analyzing the original video and the video to be analyzed and generating fault information.
The system also comprises a scheduling server used for receiving the suggested maintenance information.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method for judging display faults of an LCD display screen is characterized by comprising the following steps: the method comprises the following steps:
s1, displaying the original video by the LCD display screen;
s2, acquiring display data of the LCD screen in the display process;
s3, restoring the display data into a video to be analyzed;
s4, comparing and analyzing the video to be analyzed and the original video, wherein if the comparison and analysis result is consistent, no display fault occurs on the LCD display screen, and if the comparison and analysis result is inconsistent, a display fault occurs on the LCD display screen;
and S5, if the display fault occurs on the LCD display screen, generating fault information according to the comparison analysis result.
2. The method for judging the display failure of the LCD display screen according to claim 1, wherein: the specific method of S1 is as follows:
s1.1, determining the refresh rate of the LCD display screen;
s1.2, converting the original video into an output frame through decoding according to the refresh rate of the LCD display screen;
and S1.3, the LCD display screen displays the output frames frame by frame.
3. The method for judging the display failure of the LCD panel according to claim 2, wherein: and S2, acquiring display data of the LCD screen in the display process through the LCD interface of the LCD screen.
4. The method for judging the display failure of the LCD display screen according to claim 3, wherein: in S3, the display data is restored to a video to be parsed by a decoder.
5. The method for judging the display failure of the LCD display screen according to claim 4, wherein: the specific method of S4 is as follows:
s4.1, converting the video to be analyzed into an analysis frame through decoding according to the refresh rate of the LCD display screen;
s4.2, comparing and analyzing the analysis frame and the output frame by frame;
and S4.3, if inconsistent pixel points do not appear in all results of the frame-by-frame comparison analysis, comparing the analysis results to be consistent, if the number of the inconsistent pixel points appearing in all results of the frame-by-frame comparison analysis does not exceed a preset number threshold, comparing the analysis results to be consistent, and if the number of the inconsistent pixel points appearing in all results of the frame-by-frame comparison analysis exceeds the preset number threshold, comparing the analysis results to be inconsistent.
6. The method for determining the display failure of the LCD panel according to claim 5, wherein: s4 further includes the steps of:
s4.4, determining coordinates of all inconsistent pixel points in the frame-by-frame comparison analysis result;
and S4.5, if the occurrence frequency of the pixel point of the same coordinate exceeds a preset frequency threshold, determining the pixel point as a fault pixel point, and if the occurrence frequency of the pixel point of the same coordinate does not exceed the preset frequency threshold, determining the pixel point as a suspicious pixel point.
7. The method for determining the display failure of the LCD panel according to claim 6, wherein: the fault information comprises a determined fault part consisting of all the fault pixel points and a suspicious fault part determined by all the suspicious pixel points.
8. The method for determining the display failure of the LCD panel according to claim 7, wherein: also comprises the following steps:
and S6, generating suggested maintenance information according to the fault information.
9. A LCD display failure judgment system for performing the LCD display failure judgment method according to any one of claims 1 to 8, characterized in that: the method comprises the following steps:
the reading connector is electrically connected with the LCD interface of the LCD display screen and is used for acquiring the display data;
the encoder is electrically connected with the reading connector and used for restoring the display data into a video to be analyzed;
and the cloud server is in communication connection with the decoder and the driving mechanism of the LCD display screen and is used for acquiring the original video and the video to be analyzed, comparing and analyzing the original video and the video to be analyzed and generating the fault information.
10. The display failure judgment system according to claim 9, wherein: the system also comprises a scheduling server used for receiving the suggested maintenance information.
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