CN116229854A - Monitoring device and method for abnormal display content of liquid crystal display screen glass - Google Patents
Monitoring device and method for abnormal display content of liquid crystal display screen glass Download PDFInfo
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- CN116229854A CN116229854A CN202310047800.8A CN202310047800A CN116229854A CN 116229854 A CN116229854 A CN 116229854A CN 202310047800 A CN202310047800 A CN 202310047800A CN 116229854 A CN116229854 A CN 116229854A
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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
- 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
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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Abstract
The invention discloses a monitoring device and a method for abnormal display content of liquid crystal display glass, which comprise a display screen, wherein a plurality of optical sensors are arranged in front of the liquid crystal glass of the display screen, an image recognition structure is arranged in the display screen, and the image recognition structure is electrically connected with a liquid crystal chip of the display screen. If the screen display is frozen for some reason, the law of photosensitive receiving signals is broken, and the system can detect that the display of the liquid crystal display screen has faults and timely feed back the faults to operators, so that the supervision and maintenance of equipment are facilitated.
Description
Technical Field
The invention relates to the technical field of monitoring of abnormal display of a display screen, in particular to a device and a method for monitoring abnormal display content of glass of a liquid crystal display screen.
Background
A display is a display means that displays certain electronic files on a screen through a specific transmission device and then reflects them to the eyes of a person.
Depending on the materials of manufacture, these can be classified into: cathode ray tube displays, plasma display PDPs, liquid crystal display LCDs, etc.
In the existing display screen, the liquid crystal screen is not displayed or the picture is frozen and not updated for some reasons, and the control chip of the liquid crystal cannot be detected generally. Therefore, an external device is designed, and the display of the liquid crystal screen glass is monitored by combining the message specified by the display system, so that a higher safety function is achieved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a device and a method for monitoring abnormal display content of liquid crystal display glass, which solve the problem that a liquid crystal chip cannot monitor when the existing display screen displays abnormal display.
In order to achieve the above purpose, the invention is realized by the following technical scheme: the device comprises a display screen, wherein a plurality of light sensors are arranged in front of the liquid crystal glass of the display screen, an image recognition structure is arranged in the display screen, and the image recognition structure is electrically connected with a liquid crystal chip of the display screen.
Preferably, the image recognition structure comprises a data acquisition module, wherein the data acquisition module is arranged in the display screen, and a fault recognition processing module, a main control module, a signal output module, an alarm module and a filtering module are further arranged in the display screen.
Preferably, the filtering module receives the electrical signal of the optical sensor, processes the electrical signal and transmits the electrical signal to the data acquisition module, the data acquisition module receives the electrical signal and transmits the electrical signal to the fault identification processing module, the fault identification processing module processes the electrical signal and transmits the electrical signal to the main control module, and the main control module processes the electrical signal and transmits the electrical signal to the alarm module through the signal output module to prompt that the image display is abnormal.
Preferably, the main control module is electrically connected with the liquid crystal chip of the display screen.
Preferably, the image recognition structure further comprises a storage module, the storage module is arranged in the display screen, and the display screen is internally provided with an ISP module and a logic judgment module.
Preferably, the data acquisition module and the fault identification processing module are respectively connected to the storage module, the storage module is connected to the main control module, the storage module is respectively connected to the ISP module and the logic judgment module, and the ISP module and the logic judgment module are respectively connected to the fault identification processing module.
Preferably, the method comprises the following steps:
superposing a white small block on a specified position of the photosensor image through image processing of the display screen;
flashing the white small blocks at a certain frequency;
detecting the flicker frequency of the white small block through the light sensor at the corresponding position;
digital filtering is carried out;
recording the flicker frequency of the white small blocks;
detecting the screen blackout or screen blocking of the display screen at the same time, and judging the condition of failure at the moment;
processing the data in failure;
the main control module informs the sending frequency of the optical sensor in real time, and obtains the current frequency of the optical sensor through a message;
and calculating the accurate time of the frequency of the light sensor, and judging the robustness of detection.
The digital filtering includes the steps of:
setting the screen to display M waveform data points, wherein the average sampling frequency is N;
sampling for N times continuously, and storing the waveform data in corresponding array X i [M]Wherein i=1, 2..n.;
a new sample is taken (i>N), X i′-1 [j]＝X i [j]Where i' =2, 3,.. i′ [M]Storing the latest primary waveform data value;
the average value of N waveform data is obtained and stored in an array X [ M ]]In, i.e
Where j=1, 2, M;
and judging whether the sampling is finished, if so, continuing to calculate the average value of the N waveform data and storing the average value in an array X [ M ].
Preferably, the recording the flicker frequency of the white patch includes the steps of:
the format of input data is defined as batch size, time step number and characteristic dimension;
defaulting the batch size to 1, marking the time step number as t, and marking the characteristic dimension as n;
the representative samples are a real sequence matrix Rt n, denoted as Rt n, where the vector representation of the ith time step data.
Preferably, processing the data at the time of failure includes the steps of:
the missing value is processed by adopting a forward filling method, the abnormal value is judged by adopting a standard deviation method, and then is processed by adopting a replacement method;
comparing each element in the sequence according to the sample sequence Rt multiplied by n recorded by the previous flicker frequency;
when the difference occurs, the difference is marked as a candidate fault feature, the subsequent fault recognition processing module carries out judgment on the candidate value again, and the final fault condition is determined
Advantageous effects
The invention provides a device and a method for monitoring abnormal display content of liquid crystal display glass. The monitoring device and the method for abnormal display content of the liquid crystal display glass have the advantages that the system regularly (for example, 2 frames and 1 black-and-white inversion) sends out an on-off signal by controlling the liquid crystal pixels below the optical sensor, and the signal is received by the light sensitivity and transmitted to the fault recognition processing module for comparison. If the screen display is frozen for some reason, the law of photosensitive receiving signals is broken, and the system can detect that the display of the liquid crystal display screen has faults and timely feed back the faults to operators, so that the supervision and maintenance of equipment are facilitated.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic diagram of a system structure according to the present invention.
In the figure: 1. a display screen; 2. a light sensor; 3. a data acquisition module; 4. a fault identification processing module; 5. a main control module; 6. a signal output module; 7. an alarm module; 8. a storage module; 9. an ISP module; 10. a logic judgment module; 11. and a filtering module.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
All electric components in the scheme are connected with an adaptive power supply through wires by a person skilled in the art, and an appropriate controller is selected according to actual conditions so as to meet control requirements, specific connection and control sequences, and the electric connection is completed by referring to the following working principles in the working sequence among the electric components, wherein the detailed connection means are known in the art, and the following main description of the working principles and processes is omitted from the description of electric control.
Referring to fig. 1-2, the present invention provides a technical solution: the monitoring device for abnormal display content of glass of a liquid crystal display screen 1 comprises the display screen 1, wherein a plurality of light sensors 2 are arranged in front of the liquid crystal glass of the display screen 1, an image recognition structure is arranged in the display screen 1, and the image recognition structure is electrically connected with a liquid crystal chip of the display screen 1;
in particular, the light sensor 2 may be mounted at 4 corners or elsewhere, since the sensor is sized and mounted in place.
Embodiment one: the image recognition structure comprises a data acquisition module 3, wherein the data acquisition module 3 is arranged in the display screen 1, and a fault recognition processing module 4, a main control module 5, a signal output module 6, an alarm module 7 and a filtering module 11 are further arranged in the display screen 1.
The filtering module 11 receives the electric signal of the optical sensor 2, processes the electric signal and transmits the electric signal to the data acquisition module 3, the data acquisition module 3 receives the electric signal and transmits the electric signal to the fault recognition processing module 4, the fault recognition processing module 4 processes the electric signal and transmits the electric signal to the main control module 5, and the main control module 5 processes the electric signal and transmits the electric signal to the alarm module 7 through the signal output module 6 to prompt that the image display is abnormal;
specifically, the system controls the liquid crystal pixels arranged below the optical sensor 2 to send out a signal for opening and closing regularly (for example, 1 frame for 1 black-white inversion), and the system receives the signal by light sensitivity and transmits the signal to the fault recognition processing module 4 for comparison. If the screen display is frozen for some reason, the law of the photosensitive receiving signal is broken, and the system can detect that the display of the liquid crystal display screen 1 is faulty.
The main control module 5 is electrically connected with the liquid crystal chip of the display screen 1.
Embodiment two: the image recognition structure further comprises a storage module 8, wherein the storage module 8 is arranged in the display screen 1, and an ISP module 9 and a logic judgment module 10 are also arranged in the display screen 1.
The data acquisition module 3 and the fault identification processing module 4 are respectively connected with the storage module 8, the storage module 8 is connected with the main control module 5, the storage module 8 is respectively connected with the ISP module 9 and the logic judgment module 10, and the ISP module 9 and the logic judgment module 10 are respectively connected with the fault identification processing module 4;
specifically, the storage module 8 is used for storing the light sensing signal;
specifically, the fault identification processing module 4 marks the flicker frequency which is not above as a candidate fault characteristic frequency, and then the module further screens out the real fault characteristic frequency;
in particular, the ISP module 9 is used to process the frequency signal in the storage module.
The method comprises the following steps:
superposing a white small block on a specified position of the photosensor image through image processing of the display screen;
flashing the white small blocks at a certain frequency;
detecting the flicker frequency of the white small block through the light sensor at the corresponding position;
digital filtering is carried out;
recording the flicker frequency of the white small blocks;
detecting the screen blackout or screen blocking of the display screen at the same time, and judging the condition of failure at the moment;
processing the data in failure;
the main control module informs the sending frequency of the optical sensor in real time, and obtains the current frequency of the optical sensor through a message;
and calculating the accurate time of the frequency of the light sensor, and judging the robustness of detection.
The digital filtering includes the steps of:
setting the screen to display M waveform data points, wherein the average sampling frequency is N;
sampling for N times continuously, and storing the waveform data in corresponding array X i [M]Wherein i=1, 2..n.;
a new sample is taken (i>N), X i′-1 [j]＝X i [j]Where i' =2, 3,.. i′ [M]Storing the latest primary waveform data value;
the average value of N waveform data is obtained and stored in an array X [ M ]]In, i.e
Where j=1, 2, M;
judging whether sampling is finished, if so, continuing to calculate the average value of N waveform data and storing the average value in an array X [ M ];
specifically, N sampling values are continuously taken as a circular queue, the length of the queue is fixed to N, new data is sampled each time and put into the tail of the queue, and one data at the head of the original queue is thrown away (first-in first-out principle), and the data output by the filter each time is always the arithmetic average value of N data in the current queue.
Has the following advantages:
the method has good inhibition effect on periodic interference and high smoothness;
is suitable for high-frequency oscillation system.
The recording of the flicker frequency of the white patch comprises the steps of:
the format of input data is defined as batch size, time step number and characteristic dimension;
defaulting the batch size to 1, marking the time step number as t, and marking the characteristic dimension as n;
the representative samples are a real sequence matrix Rt n, denoted as Rt n, where the vector representation of the ith time step data.
Processing the data at the time of failure includes the steps of:
the missing value is processed by adopting a forward filling method, the abnormal value is judged by adopting a standard deviation method, and then is processed by adopting a replacement method;
comparing each element in the sequence according to the sample sequence Rt multiplied by n recorded by the previous flicker frequency;
when the difference occurs, the difference is marked as a candidate fault feature, the subsequent fault recognition processing module carries out judgment on the candidate value again, and the final fault condition is determined
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The term "comprising" an element defined by the term "comprising" does not exclude the presence of other identical elements in a process, method, article or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The monitoring device and method for abnormal display content of liquid crystal display glass comprise a display screen (1) and are characterized in that a plurality of light sensors (2) are arranged in front of the liquid crystal glass of the display screen (1), an image recognition structure is arranged in the display screen (1), and the image recognition structure is electrically connected with a liquid crystal chip of the display screen (1).
2. The monitoring device and method for abnormal display content of the liquid crystal display glass according to claim 1, wherein the image recognition structure comprises a data acquisition module (3), the data acquisition module (3) is arranged in the display screen (1), and a fault recognition processing module (4), a main control module (5), a signal output module (6), an alarm module (7) and a filtering module (11) are further arranged in the display screen (1).
3. The device and method for monitoring abnormal display content of liquid crystal display glass according to claim 2, wherein the filtering module (11) receives the electric signal of the optical sensor (2) and transmits the electric signal to the data acquisition module (3), the data acquisition module (3) receives the electric signal and transmits the electric signal to the fault identification processing module (4), the fault identification processing module (4) processes the electric signal and transmits the electric signal to the main control module (5), and the main control module (5) processes the electric signal and transmits the electric signal to the alarm module (7) through the signal output module (6) to prompt abnormal display of the image.
4. The device and method for monitoring abnormal display content of liquid crystal display glass according to claim 2, wherein the main control module (5) is electrically connected with the liquid crystal chip of the display screen (1).
5. The device and method for monitoring abnormal display content of liquid crystal display glass according to claim 2, wherein the image recognition structure further comprises a storage module (8), the storage module (8) is arranged in the display screen (1), and an ISP module (9) and a logic judgment module (10) are further arranged in the display screen (1).
6. The device and method for monitoring abnormal display content of liquid crystal display glass according to claim 5, wherein the data acquisition module (3) and the fault identification processing module (4) are respectively connected to the storage module (8), the storage module (8) is connected to the main control module (5), the storage module (8) is respectively connected to the ISP module (9) and the logic judgment module (10), and the ISP module (9) and the logic judgment module (10) are respectively connected to the fault identification processing module (4).
7. The device and method for monitoring abnormal display content of liquid crystal display glass according to claim 1, comprising the following steps:
superposing a white small block on a specified position of the photosensor image through image processing of the display screen;
flashing the white small blocks at a certain frequency;
detecting the flicker frequency of the white small block through the light sensor at the corresponding position;
digital filtering is carried out;
recording the flicker frequency of the white small blocks;
detecting the screen blackout or screen blocking of the display screen at the same time, and judging the condition of failure at the moment;
processing the data in failure;
the main control module informs the sending frequency of the optical sensor in real time, and obtains the current frequency of the optical sensor through a message;
and calculating the accurate time of the frequency of the light sensor, and judging the robustness of detection.
8. The device and method for monitoring abnormal display content of liquid crystal display glass according to claim 1, wherein the digital filtering comprises the following steps:
setting the screen to display M waveform data points, wherein the average sampling frequency is N;
sampling for N times continuously, and storing the waveform data in corresponding array X i [M]Wherein i=1, 2..n.;
a new sample is taken (i>N), X i′-1 [j]＝X i [j]Where i' =2, 3,.. i′ [M]Storing the latest primary waveform data value;
the average value of N waveform data is obtained and stored in an array X [ M ]]In, i.e
Where j=1, 2, M;
and judging whether the sampling is finished, if so, continuing to calculate the average value of the N waveform data and storing the average value in an array X [ M ].
9. The device and method for monitoring abnormal display content of a liquid crystal display glass according to claim 1, wherein the step of recording the flicker frequency of the white small block comprises the following steps:
the format of input data is defined as batch size, time step number and characteristic dimension;
defaulting the batch size to 1, marking the time step number as t, and marking the characteristic dimension as n;
the representative samples are a real sequence matrix Rt n, denoted as Rt n, where the vector representation of the ith time step data.
10. The device and method for monitoring abnormal display content of liquid crystal display glass according to claim 1, wherein the processing of the data in failure comprises the following steps:
the missing value is processed by adopting a forward filling method, the abnormal value is judged by adopting a standard deviation method, and then is processed by adopting a replacement method;
comparing each element in the sequence according to the sample sequence Rt multiplied by n recorded by the previous flicker frequency;
when the difference occurs, the difference is marked as a candidate fault feature, and the subsequent fault recognition processing module judges the candidate value again to determine the final fault condition.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310047800.8A CN116229854A (en) | 2023-01-31 | 2023-01-31 | Monitoring device and method for abnormal display content of liquid crystal display screen glass |
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| CN202310047800.8A CN116229854A (en) | 2023-01-31 | 2023-01-31 | Monitoring device and method for abnormal display content of liquid crystal display screen glass |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117238226A (en) * | 2023-11-13 | 2023-12-15 | 众显科技(深圳)有限公司 | LED display screen fault self-checking method and system |
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2023
- 2023-01-31 CN CN202310047800.8A patent/CN116229854A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117238226A (en) * | 2023-11-13 | 2023-12-15 | 众显科技(深圳)有限公司 | LED display screen fault self-checking method and system |
| CN117238226B (en) * | 2023-11-13 | 2024-02-06 | 众显科技(深圳)有限公司 | LED display screen fault self-checking method and system |
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