CN112731102B - Liquid crystal display television backlight fault detection method - Google Patents
Liquid crystal display television backlight fault detection method Download PDFInfo
- Publication number
- CN112731102B CN112731102B CN202011544486.7A CN202011544486A CN112731102B CN 112731102 B CN112731102 B CN 112731102B CN 202011544486 A CN202011544486 A CN 202011544486A CN 112731102 B CN112731102 B CN 112731102B
- Authority
- CN
- China
- Prior art keywords
- backlight
- fault
- detection
- state
- environment variable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
- G01R31/2825—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere in household appliances or professional audio/video equipment
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Multimedia (AREA)
- General Engineering & Computer Science (AREA)
- Liquid Crystal Display Device Control (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
The invention discloses a liquid crystal display television backlight fault detection method, which comprises the following steps: and performing current backlight fault state detection respectively in an Mboost stage and a normal viewing stage, wherein the function configuration of backlight fault detection in the Mboost stage is realized by combining the product function configuration and the environment variable, the backlight fault is selected to be detected once after the backlight in the Mboost stage is electrified according to the detection circuit characteristic, and the real-time detection of the backlight fault in the viewing process is realized by establishing a fault state detection thread in the normal viewing stage according to the detection circuit characteristic. The method adopts a new backlight fault detection process, introduces a real-time detection process, and realizes the real-time detection of the backlight fault.
Description
Technical Field
The invention relates to the technical field of liquid crystal display television backlight fault detection, in particular to a liquid crystal display television backlight fault detection method.
Background
The backlight module of the liquid crystal television is a key part for displaying the liquid crystal television, if the backlight module works abnormally, the whole liquid crystal television image cannot be normally displayed, and a user cannot normally watch the television, so that the backlight intelligent detection is introduced into the intelligent diagnosis of the television fault, a quick and accurate fault solution is provided for the user after sale, and the user experience and the brand reputation are improved.
The backlight intelligent detection of the existing liquid crystal television is that a circuit converts the backlight state into a GPIO port, a CPU obtains the level of the corresponding GPIO port to carry out the backlight intelligent detection, the GPIO can always output a specific level when the backlight works abnormally, and software can obtain the backlight working state in a mode of inquiring the level of the GPIO at any moment, so that the software does not carry out real-time processing during the detection, but carries out the detection after receiving an instruction, and the cost of the detection circuit is higher. In order to reduce the detection hardware cost, a new detection circuit is adopted. In the new backlight detection circuit, the GPIO which reflects the backlight fault state has level change only in a short time (a few seconds) when the GPIO fails, namely the GPIO which reflects the backlight fault state does not keep the fault state all the time when the GPIO fails, and if the software still adopts the original detection method and process, the fault phenomenon can not be captured, thus causing the detection failure.
Disclosure of Invention
The invention aims to overcome the defects in the background technology and provide a liquid crystal display television backlight fault detection method, which adopts a new backlight fault detection process and introduces a real-time detection process, thereby realizing the real-time detection of the backlight fault, and solving the problems that the original software scheme has no real-time property and the fault can not be detected after a new circuit is used, thereby causing the detection failure.
In order to achieve the technical effects, the invention adopts the following technical scheme:
a liquid crystal television backlight fault detection method comprises the following steps: performing existing backlight fault state detection respectively at an Mboost stage and a normal viewing stage, wherein the function configuration of backlight fault detection at the Mboost stage is realized by combining the product function configuration and the environment variable, the backlight fault is selected to be detected once after the backlight at the Mboost stage is electrified according to the detection circuit characteristics, and the real-time detection of the backlight fault in the viewing process is realized by establishing a fault state detection thread at the normal viewing stage according to the detection circuit characteristics; according to the technical scheme, intelligent diagnosis of the backlight fault state is realized by adopting different modes in stages, namely, a mode of performing backlight state monitoring by starting a thread during boot stage detection and normal watching is added, backlight fault detection possibly occurring in different stages of the liquid crystal display television is covered, real-time detection of the backlight fault is realized, and the problems that the original scheme has no real-time property and the detection cost is high are solved.
Further, in the detection of the backlight fault state at the Mboot stage, the detection result at the Mboot stage is stored in an environment variable mode, and is reported when fault information is collected, and the detection result at the Mboot stage is used as a starting basis of a detection thread at a normal watching stage.
Further, the normal viewing phase does not start the detection thread anymore only when the failure has been detected in the Mboot phase.
Further, if a fault is detected in the normal watching process, the fault information is actively reported, and the detection thread is ended.
Further, the implementation process comprises:
detecting at an MBoot stage, and detecting a backlight fault state GPIO after a system supplies power to a backlight component to light the backlight when a television is guided by Boot to enter a starting process;
establishing a backlight state real-time monitoring thread, and detecting the backlight state in real time;
creating a detection result environment variable, storing the detection result in the Boot stage in the detection result environment variable, and uploading the corresponding detection result environment variable when an information acquisition instruction is received;
and establishing a backlight fault real-time uploading mechanism in a normal viewing stage, and uploading the fault state in the viewing process to an information acquisition server in real time.
Further, the detection result environment variables include: backlight fault detection environment variables and backlight fault detection state environment variables;
the backlight fault detection environment variable is realized by adding a backlight fault detection configuration item in the environment variable, the backlight fault detection function is configured in a product function configuration ini file, if backlight fault detection is required, the backlight fault detection configuration item is converted into the backlight fault detection environment variable and is stored in Flash for boot use when a television is powered on for the first time, and if the backlight fault detection configuration item does not exist in the product function configuration, the backlight fault detection environment variable is not set;
the backlight fault detection state environment variable is realized by adding a backlight fault state item in the environment variable, wherein the backlight fault state item represents a backlight fault state detection result in an Mboot stage, and when backlight fault detection is required and the detection result is a fault, the value of the backlight fault detection state environment variable is set as a fault state value; if the backlight fault state detection is not needed or the detection result is no fault, setting the value of the backlight fault detection state environment variable as a no-fault state value; and when the fault information is acquired, clearing the environment variable of the backlight fault detection state.
Further, the backlight failure detection flow in the Mboot stage is as follows:
s1, after the backlight is turned on at the Mboot stage, reading an environment variable of a backlight fault detection state, judging whether the backlight fault detection is needed, and if so, entering the step S2; otherwise, go to step S5;
s2, entering a time delay waiting mode, obtaining a GPIO level value in a backlight state after a backlight detection circuit is stabilized, judging whether the current GPIO level value is abnormal or not, and if so, entering a step S3; otherwise, go to step S5;
s3, entering anti-jitter timing, if the duration time of the abnormal level exceeds a preset time threshold, determining that the backlight fault is detected, and entering step S4; otherwise, go to step S5;
s4, setting the backlight fault detection state environment variable value as a fault state value;
and S5, setting the backlight fault detection state environment variable value as a fault-free state value, and exiting the detection.
Further, in step S1, if the backlight failure detection state environment variable is not read, or the backlight failure detection state environment variable value is a non-detection value, no detection is performed;
and further includes step S6: and when the fault information is acquired, clearing the environment variable of the backlight fault detection state.
Further, the backlight failure detection process in the normal viewing stage is as follows:
s1, when the television is started and enters a normal watching state, reading whether a backlight fault detection function is set in a product function configuration ini file, and if so, entering a step S2; otherwise, go to step S5;
s2, reading the environment variable of the backlight fault detection state to judge whether the backlight fault is detected in the Mboot stage, and if the backlight fault is not detected, entering the step S3; if so, go to step S4;
s3, starting a backlight fault detection thread, carrying out real-time monitoring detection on the backlight fault state, and detecting the backlight fault state by acquiring a GPIO level value of the backlight state;
s4, reporting backlight fault information and clearing environment variables of a backlight fault detection state;
and S5, judging whether the current power-on is the first power-on, if so, setting an environment variable of a backlight fault detection state, and otherwise, not detecting.
Further, the step of detecting the backlight fault state by obtaining the backlight state GPIO level value in step S3 specifically includes the following steps:
step 1, reading a GPIO level value in a backlight state, judging whether the current GPIO level value is abnormal or not, and if so, entering a step 2; otherwise, returning to read the GPIO level value of the backlight state;
step 2, entering anti-jitter timing, if the duration time of the abnormal level exceeds a preset time threshold, considering that the backlight fault is detected, and entering step 3; otherwise, returning to the step 1;
and 3, setting the backlight fault detection state environment variable value as a fault state value and reporting backlight fault information.
Compared with the prior art, the invention has the following beneficial effects:
according to the liquid crystal television backlight fault detection method, the backlight fault state detection is introduced in the Boot stage, the real-time detection and other processes of the backlight fault state in the normal watching process of the television are added, the real-time detection of the backlight fault is realized, the failure of the backlight fault detection is avoided, the accuracy of the backlight fault detection is ensured, an intelligent liquid crystal television backlight fault diagnosis means is provided, the backlight fault diagnosis cost is reduced, the accuracy and the real-time performance of the diagnosis are also ensured, and the promotion effect of the whole-machine backlight fault diagnosis in the intelligent television is achieved.
Drawings
Fig. 1 is a schematic software logic diagram of a lcd tv backlight failure detection method according to an embodiment of the present invention.
FIG. 2 is a schematic diagram of a backlight failure detection procedure in Mboost phase in one embodiment of the invention.
Fig. 3 is a schematic diagram illustrating a backlight failure detection process in a normal viewing phase according to an embodiment of the present invention.
Detailed Description
The invention will be further elucidated and described with reference to the embodiments of the invention described hereinafter.
Example (b):
the first embodiment is as follows:
a backlight fault detection method for a liquid crystal television adopts a new flow, combines the working principle of television software and the characteristics of a detection circuit on the software, and realizes intelligent diagnosis of backlight fault states in different modes in stages, namely, a mode of performing backlight state monitoring by starting threads during boot stage detection and normal watching is added, so that the real-time performance of detection is improved.
As shown in fig. 1, in this embodiment, the present solution exists in the whole machine in the form of software, and includes a boot stage and a normal viewing stage, and realizes detection and report of backlight faults in the boot stage and the normal viewing stage.
Specifically, the core idea includes: performing existing backlight fault state detection respectively at an Mboost stage and a normal viewing stage, wherein the function configuration of backlight fault detection at the Mboost stage is realized by combining the product function configuration and the environment variable, the backlight fault is selected to be detected once after the backlight at the Mboost stage is electrified according to the detection circuit characteristics, and the real-time detection of the backlight fault in the viewing process is realized by establishing a fault state detection thread at the normal viewing stage according to the detection circuit characteristics; according to the technical scheme, intelligent diagnosis of the backlight fault state is realized by adopting different modes in stages, namely, a mode of performing backlight state monitoring by starting a thread during boot stage detection and normal watching is added, backlight fault detection possibly occurring in different stages of the liquid crystal display television is covered, real-time detection of the backlight fault is realized, and the problems that the original scheme has no real-time property and the detection cost is high are solved.
In the detection of the backlight fault state at the Mboost stage, the detection result at the Mboost stage is stored in an environment variable mode, the failure information is reported when being acquired, and the detection result at the Mboost stage is used as the starting basis of a detection thread at a normal watching stage. And the normal viewing phase does not start the detection thread anymore only when the failure has been detected in the Mboot phase. And if the fault is detected to occur in the normal watching process, actively reporting fault information and finishing the detection thread.
Specifically, in this embodiment, the implementation of the scheme includes the following aspects:
detecting at an MBoot stage, and detecting a backlight fault state GPIO after a system supplies power to a backlight component to light the backlight when a television is guided by Boot to enter a starting process;
establishing a backlight state real-time monitoring thread, and detecting the backlight state in real time;
creating a detection result environment variable, storing the detection result in the Boot stage in the detection result environment variable, and uploading the corresponding detection result environment variable when an information acquisition instruction is received;
and establishing a backlight fault real-time uploading mechanism in a normal watching stage, and uploading the fault state in the watching process to an information acquisition server in real time so as to carry out intelligent service after sale.
The implementation specifically includes adding a backlight failure detection configuration item and adding a backlight failure state item in the environment variable. Namely, the upper detection result environment variables include: backlight fault detection environment variable and backlight fault detection state environment variable.
The backlight fault detection environment variable is realized by adding a backlight fault detection configuration item in the environment variable, the backlight fault detection function is configured in a product function configuration ini file, if backlight fault detection is required, the backlight fault detection configuration item is converted into the backlight fault detection environment variable and stored in Flash for boot use when a television is powered on for the first time, and if no backlight fault detection configuration item exists in the product function configuration, the backlight fault detection environment variable is not set.
The backlight fault detection state environment variable is realized by adding a backlight fault state item in the environment variable, wherein the backlight fault state item represents a backlight fault state detection result in an Mboot stage, and when backlight fault detection is required and the detection result is a fault, the value of the backlight fault detection state environment variable is set as a fault state value; if the backlight fault state detection is not needed or the detection result is no fault, setting the value of the backlight fault detection state environment variable as a no-fault state value; and when the fault information is acquired, clearing the environment variable of the backlight fault detection state.
The backlight fault detection process in the Mboot stage comprises the following steps: and in the boot guiding process of the television, after the backlight is turned on, the boot performs the backlight fault detection processing in the boot stage by reading the GPIO level value in the fault state, and stores the detection result in an environment variable mode for the fault information detection system to collect after the boot is completed.
As shown in fig. 2, the specific implementation flow is as follows:
s1, after the backlight is turned on at the Mboot stage, reading an environment variable of a backlight fault detection state, judging whether the backlight fault detection is needed, and if so, entering the step S2; otherwise, the process proceeds to step S5.
If the backlight fault detection state environment variable is not read or the backlight fault detection state environment variable value is not detected, the detection is not carried out.
S2, entering a time delay waiting mode, obtaining a GPIO level value in a backlight state after a backlight detection circuit is stabilized, judging whether the current GPIO level value is abnormal or not, and if so, entering a step S3; otherwise, go to step S5;
s3, entering anti-jitter timing, if the duration time of the abnormal level exceeds a preset time threshold (set to 500ms in the embodiment), determining that a backlight fault is detected, and entering step S4; otherwise, go to step S5;
s4, setting the backlight fault detection state environment variable value as a fault state value, and uploading fault information to a fault information acquisition server through an information acquisition system;
and S5, setting the backlight fault detection state environment variable value as a fault-free state value, and exiting the detection.
And S6, clearing the environment variable of the backlight fault detection state after the fault information is acquired.
The backlight fault detection process in the normal viewing stage comprises the following steps: after the boot of the television is finished and the television enters a normal watching state, the middleware starts a backlight fault state detection thread and realizes real-time reporting of fault information and reporting of fault states in the boot stage in the watching process.
As shown in fig. 3, the specific implementation flow is as follows:
s1, when the television is started and enters a normal watching state, reading whether a backlight fault detection function is set in a product function configuration ini file, and if so, entering a step S2; otherwise, go to step S5;
s2, reading the environment variable of the backlight fault detection state to judge whether the backlight fault is detected in the Mboot stage, and if the backlight fault is not detected, entering the step S3; if so, go to step S4;
and S3, starting a backlight fault detection thread, carrying out real-time monitoring and detection on the backlight fault state, and detecting the backlight fault state by acquiring a GPIO level value of the backlight state.
Specifically, the step of detecting the backlight fault state by obtaining the GPIO level value of the backlight state includes the following steps:
step 1, reading a GPIO level value in a backlight state, judging whether the current GPIO level value is abnormal or not, and if so, entering a step 2; otherwise, returning to read the GPIO level value of the backlight state;
step 2, entering anti-jitter timing, if the duration time of the abnormal level exceeds a preset time threshold, considering that the backlight fault is detected, and entering step 3; otherwise, returning to the step 1;
and 3, setting the backlight fault detection state environment variable value as a fault state value, and reporting backlight fault information, namely uploading the fault information to a fault information acquisition server through an information acquisition system.
And S4, reporting the backlight fault information and clearing the environment variable of the backlight fault detection state.
Specifically, if the backlight has been detected to have a fault in the Mboot stage, when fault information is collected, the middleware reads the backlight fault state environment variable, converts the backlight fault state environment variable into a fault state, and returns the fault state environment variable to the information collection system to complete the fault information report. And if the backlight is detected to have a fault in the Mboost stage, the backlight detection thread is not started in the normal viewing stage.
And S5, judging whether the current power-on is the first power-on, if so, setting an environment variable of a backlight fault detection state, and otherwise, not detecting.
Example two
The embodiment discloses a computer device which can be a server and comprises a processor, a memory, a network interface and a database which are connected through a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the computer equipment is used for storing data related to the liquid crystal television backlight fault detection method. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement the liquid crystal television backlight failure detection method.
In another embodiment, a computer device is provided, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the lcd tv backlight failure detection method in the first embodiment when executing the computer program. To avoid repetition, further description is omitted here.
In another embodiment, a computer-readable storage medium is provided, on which a computer program is stored, and the computer program is executed by a processor to implement the steps of the method for detecting the backlight failure of the lcd tv in the first embodiment. To avoid repetition, further description is omitted here.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (9)
1. A method for detecting backlight faults of a liquid crystal display television is characterized by comprising the following steps: respectively detecting backlight fault states in an Mboost stage and a normal viewing stage, wherein the function configuration of backlight fault detection in the Mboost stage is realized by combining the product function configuration and the environment variable, the backlight fault is detected at one time after the backlight in the Mboost stage is electrified according to the detection circuit characteristic, and the real-time detection of the backlight fault in the normal viewing process is realized by establishing a fault state detection thread in the normal viewing stage according to the detection circuit characteristic; in the backlight fault detection of the Mboost stage, the detection result of the Mboost stage is stored in an environment variable mode, the failure information is reported when being acquired, and the detection result of the Mboost stage is used as the starting basis of the detection thread of the normal watching stage.
2. The method of claim 1, wherein the normal viewing phase does not start the detection thread any more only when the Mboot phase has detected a failure.
3. The method as claimed in claim 2, wherein if the failure is detected during normal viewing, the method actively reports the failure information and ends the detection thread.
4. The method for detecting the backlight failure of the liquid crystal display television as claimed in claim 1, wherein the implementation process comprises:
detecting backlight fault at the Mboost stage, and detecting a backlight fault state GPIO after a system supplies power to a backlight component to light the backlight when a television is guided by Boot to enter a starting process;
establishing a backlight state real-time monitoring thread, and detecting the backlight state in real time;
creating a detection result environment variable, storing the detection result in the Boot stage in the detection result environment variable, and uploading the corresponding detection result environment variable when an information acquisition instruction is received;
and establishing a backlight fault real-time uploading mechanism in a normal viewing stage, and uploading the fault state in the viewing process to an information acquisition server in real time.
5. The method according to claim 4, wherein the detection result environment variables comprise: backlight fault detection environment variables and backlight fault detection state environment variables;
the backlight fault detection environment variable is realized by adding a backlight fault detection configuration item in the environment variable, the backlight fault detection function is configured in a product function configuration ini file, if backlight fault detection is required, the backlight fault detection configuration item is converted into the backlight fault detection environment variable and is stored in Flash for boot use when a television is powered on for the first time, and if the backlight fault detection configuration item does not exist in the product function configuration, the backlight fault detection environment variable is not set;
the backlight fault detection state environment variable is realized by adding a backlight fault state item in the environment variable, wherein the backlight fault state item represents a backlight fault state detection result in an Mboot stage, and when backlight fault detection is required and the detection result is a fault, the value of the backlight fault detection state environment variable is set as a fault state value; if the backlight fault state detection is not needed or the detection result is no fault, setting the value of the backlight fault detection state environment variable as a no-fault state value; and when the fault information is acquired, clearing the environment variable of the backlight fault detection state.
6. The method according to claim 5, wherein the backlight failure detection procedure in Mboot stage is as follows:
s1, after the backlight is turned on at the Mboot stage, reading the environment variable of the backlight fault detection state, judging whether the backlight fault detection is needed, and if so, entering the step S2; otherwise, go to step S5;
s2, entering a time delay waiting mode, obtaining a GPIO level value in a backlight state after a backlight detection circuit is stabilized, judging whether the current GPIO level value is abnormal or not, and if so, entering a step S3; otherwise, go to step S5;
s3, entering anti-jitter timing, if the duration time of the abnormal level exceeds a preset time threshold, determining that the backlight fault is detected, and entering step S4; otherwise, go to step S5;
s4, setting the backlight fault detection state environment variable value as a fault state value;
and S5, setting the backlight fault detection state environment variable value as a fault-free state value, and exiting the detection.
7. The method according to claim 6, wherein in step S1, if the backlight failure detection state environment variable is not read or the backlight failure detection state environment variable value is not detected, then no detection is made;
and further includes step S6: and when the fault information is acquired, clearing the environment variable of the backlight fault detection state.
8. The method according to claim 5, wherein the backlight failure detection process in the normal viewing stage is as follows:
s1, when the television is started and enters a normal watching state, reading whether a backlight fault detection function is set in the product function configuration ini file, and if so, entering the step S2; otherwise, go to step S5;
s2, reading the environment variable of the backlight fault detection state to judge whether the backlight fault is detected in the Mboot stage, and if the backlight fault is not detected, entering the step S3; if so, go to step S4;
s3, starting a backlight fault detection thread, carrying out real-time monitoring detection on the backlight fault state, and detecting the backlight fault state by acquiring a GPIO level value of the backlight state;
s4, reporting backlight fault information and clearing environment variables of a backlight fault detection state;
and S5, judging whether the current power-on is the first power-on, if so, setting an environment variable of a backlight fault detection state, and otherwise, not detecting.
9. The method for detecting the backlight failure of the lcd tv of claim 8, wherein the step of detecting the backlight failure state by obtaining the GPIO level value of the backlight state in the step S3 specifically comprises the following steps:
step 1, reading a GPIO level value in a backlight state, judging whether the current GPIO level value is abnormal or not, and if so, entering a step 2; otherwise, returning to read the GPIO level value of the backlight state;
step 2, entering anti-jitter timing, if the duration time of the abnormal level exceeds a preset time threshold, considering that the backlight fault is detected, and entering step 3; otherwise, returning to the step 1;
and 3, setting the backlight fault detection state environment variable value as a fault state value and reporting backlight fault information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011544486.7A CN112731102B (en) | 2020-12-23 | 2020-12-23 | Liquid crystal display television backlight fault detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011544486.7A CN112731102B (en) | 2020-12-23 | 2020-12-23 | Liquid crystal display television backlight fault detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112731102A CN112731102A (en) | 2021-04-30 |
| CN112731102B true CN112731102B (en) | 2021-12-21 |
Family
ID=75604913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011544486.7A Active CN112731102B (en) | 2020-12-23 | 2020-12-23 | Liquid crystal display television backlight fault detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112731102B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114255682A (en) * | 2021-12-06 | 2022-03-29 | 四川长虹电器股份有限公司 | Detection device and method for regional dimming function |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0713100A1 (en) * | 1994-11-15 | 1996-05-22 | AT&T GLOBAL INFORMATION SOLUTIONS INTERNATIONAL INC. | Fault-detecting electronic display module |
| CN101388175A (en) * | 2007-09-14 | 2009-03-18 | 群康科技(深圳)有限公司 | Backlight control circuit and control method thereof |
| CN101437173A (en) * | 2008-11-28 | 2009-05-20 | 四川长虹电器股份有限公司 | Instrument for detecting flat-plate television failure and detection method thereof |
| US20140091999A1 (en) * | 2012-09-28 | 2014-04-03 | Apple Inc. | Multiple hardware paths for backlight control in computer systems |
| CN105679256A (en) * | 2015-05-25 | 2016-06-15 | 深圳Tcl数字技术有限公司 | Method and device for dynamically adjusting backlight |
| CN106710494A (en) * | 2016-12-23 | 2017-05-24 | 武汉精立电子技术有限公司 | Display module detection system and detection method |
| CN107192939A (en) * | 2017-06-08 | 2017-09-22 | 京东方科技集团股份有限公司 | A kind of detection method and detecting system of the working condition of circuit |
| CN107818036A (en) * | 2017-10-31 | 2018-03-20 | 努比亚技术有限公司 | Blank screen detection method, mobile terminal and computer-readable recording medium |
| CN207318661U (en) * | 2017-10-26 | 2018-05-04 | 四川长虹电器股份有限公司 | LED backlight testing tool for TV |
| CN111212281A (en) * | 2020-01-14 | 2020-05-29 | 深圳市金锐显数码科技有限公司 | Video board detection method and detection device |
-
2020
- 2020-12-23 CN CN202011544486.7A patent/CN112731102B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0713100A1 (en) * | 1994-11-15 | 1996-05-22 | AT&T GLOBAL INFORMATION SOLUTIONS INTERNATIONAL INC. | Fault-detecting electronic display module |
| CN101388175A (en) * | 2007-09-14 | 2009-03-18 | 群康科技(深圳)有限公司 | Backlight control circuit and control method thereof |
| CN101437173A (en) * | 2008-11-28 | 2009-05-20 | 四川长虹电器股份有限公司 | Instrument for detecting flat-plate television failure and detection method thereof |
| US20140091999A1 (en) * | 2012-09-28 | 2014-04-03 | Apple Inc. | Multiple hardware paths for backlight control in computer systems |
| CN105679256A (en) * | 2015-05-25 | 2016-06-15 | 深圳Tcl数字技术有限公司 | Method and device for dynamically adjusting backlight |
| CN106710494A (en) * | 2016-12-23 | 2017-05-24 | 武汉精立电子技术有限公司 | Display module detection system and detection method |
| CN107192939A (en) * | 2017-06-08 | 2017-09-22 | 京东方科技集团股份有限公司 | A kind of detection method and detecting system of the working condition of circuit |
| CN207318661U (en) * | 2017-10-26 | 2018-05-04 | 四川长虹电器股份有限公司 | LED backlight testing tool for TV |
| CN107818036A (en) * | 2017-10-31 | 2018-03-20 | 努比亚技术有限公司 | Blank screen detection method, mobile terminal and computer-readable recording medium |
| CN111212281A (en) * | 2020-01-14 | 2020-05-29 | 深圳市金锐显数码科技有限公司 | Video board detection method and detection device |
Non-Patent Citations (2)
| Title |
|---|
| 民航空管监控显示器故障维修总结;刘伟光;《通信电源技术》;20190925;第36卷(第9期);第90-94页 * |
| 电视背光LED灯失效机理和分析方法;焦春生;《电视技术》;20171230;第41卷;第100-104页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112731102A (en) | 2021-04-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10776129B2 (en) | Method and apparatus for controlling a startup bootstrap program of an intelligent TV set | |
| CN109344066B (en) | Method, system and terminal for testing browser page | |
| CN116580657A (en) | Fault detection method, device, equipment and computer readable storage medium | |
| US10108474B2 (en) | Trace capture of successfully completed transactions for trace debugging of failed transactions | |
| CN112731102B (en) | Liquid crystal display television backlight fault detection method | |
| CN111554219A (en) | Display equipment testing method and device, electronic product and storage medium | |
| CN113835028B (en) | Automatic detection method, terminal and computer readable storage medium for pan-tilt motor | |
| CN110874295B (en) | Test method and system for boot verification after abnormal shutdown | |
| CN110865920B (en) | Startup exception processing method and device, electronic equipment and storage medium | |
| CN117609031A (en) | Multi-core on-chip program debugging method, device, equipment and storage medium | |
| CN114860512A (en) | Method, device, equipment and system for detecting working state of SOC (system on chip) chip of vehicle | |
| CN110435669B (en) | Vehicle fault prompt information processing method and device and terminal | |
| CN116149941A (en) | Monitoring method and device of server component, server and storage medium | |
| CN111597111A (en) | Application program starting speed monitoring method and device | |
| CN112579369A (en) | Multithreading flashing system, method, device, equipment and storage medium | |
| CN103176873A (en) | Counting card | |
| CN113810684A (en) | Method and device for starting aging test | |
| CN109739752B (en) | Built-in resource testing method and device, electronic equipment and readable storage medium | |
| CN113608939A (en) | Server starting timing method, device, terminal and storage medium in performance test | |
| CN117149638B (en) | UI (user interface) automatic testing method and device, computer equipment and storage medium | |
| CN118277136A (en) | Inspection method, device, equipment, medium and program product of data center | |
| CN110932941B (en) | Cloud screen connection state detection method, server and storage medium | |
| CN112988475B (en) | Disaster tolerance test method, device, test server and medium | |
| CN116704920B (en) | Point screen detection method, system, equipment and storage medium | |
| CN114356617B (en) | Error injection testing method, device, system and computing equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |