CN116106718A - LED fault detection method, system, computer equipment and readable storage medium - Google Patents
LED fault detection method, system, computer equipment and readable storage medium Download PDFInfo
- Publication number
- CN116106718A CN116106718A CN202211547634.XA CN202211547634A CN116106718A CN 116106718 A CN116106718 A CN 116106718A CN 202211547634 A CN202211547634 A CN 202211547634A CN 116106718 A CN116106718 A CN 116106718A
- Authority
- CN
- China
- Prior art keywords
- fault detection
- led
- gray
- led fault
- target sub
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 145
- 238000000034 method Methods 0.000 claims abstract description 25
- 230000008033 biological extinction Effects 0.000 claims abstract description 16
- 238000004590 computer program Methods 0.000 claims description 12
- 238000010586 diagram Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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
- G01R31/26—Testing of individual semiconductor devices
- G01R31/27—Testing of devices without physical removal from the circuit of which they form part, e.g. compensating for effects surrounding elements
- G01R31/275—Testing of devices without physical removal from the circuit of which they form part, e.g. compensating for effects surrounding elements for testing individual semiconductor components within integrated circuits
-
- 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
- G01R31/26—Testing of individual semiconductor devices
- G01R31/27—Testing of devices without physical removal from the circuit of which they form part, e.g. compensating for effects surrounding elements
-
- 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
- G01R31/44—Testing lamps
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Debugging And Monitoring (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
Abstract
The invention discloses a method, a system, computer equipment and a readable storage medium for detecting LED faults, which relate to the technical field of LEDs and comprise the following steps: sequentially identifying target sub-gray frames, and sequentially executing an LED fault detection process in the target sub-gray frames, wherein the target sub-gray frames are sub-gray frames with the longest LED extinction time, and the LED fault detection process comprises: transmitting an LED fault detection start command to the drive IC to start LED fault detection; transmitting an LED failure detection stop command to the driving IC to stop the LED failure detection; reading LED fault detection data generated during the LED fault detection; and sending display data to the drive IC. By adopting the invention, the problem of display interruption in the LED fault detection process can be avoided.
Description
Technical Field
The present invention relates to the field of LED technologies, and in particular, to a method, a system, a computer device, and a readable storage medium for detecting LED faults.
Background
LED faults are mainly open faults and short faults, and in general, the LED driver IC turns on the LED with a weak current (typically in the uA level), so as to detect the LED cathode voltage to determine whether the LED has failed. Specifically, the conventional LED fault detection implementation method is as follows:
1. sending an LED fault detection starting command to the driving IC to start LED fault detection;
2. sending an LED fault detection stopping command to the driving IC to stop LED fault detection;
3. reading LED fault detection data;
4. sending display data to the drive IC, and recovering display;
because the LED fault detection process is completed within 1us, and the common LED lamp panel is composed of a plurality of LEDs, and the LED fault detection data are read one by one, the LED fault detection data are read for a relatively long time, and accordingly, the longer display interruption can be caused.
Disclosure of Invention
The invention aims to solve the technical problem of providing an LED fault detection method, an LED fault detection system, computer equipment and a readable storage medium, which can avoid the problem of display interruption in the LED fault detection process.
In order to solve the technical problems, the invention provides an LED fault detection method, which comprises the following steps: sequentially identifying target sub-gray frames, and sequentially executing an LED fault detection process in the target sub-gray frames, wherein the target sub-gray frames are sub-gray frames with the longest LED extinction time, and the LED fault detection process comprises: transmitting an LED fault detection start command to the drive IC to start LED fault detection; transmitting an LED failure detection stop command to the driving IC to stop the LED failure detection; reading LED fault detection data generated during the LED fault detection; and sending display data to the drive IC.
As an improvement of the above solution, the method for identifying the target sub-gray frame includes: and determining a sub-gray frame with the longest LED extinction time in the gray frame according to the gray coding, wherein the gray frame comprises a plurality of sub-gray frames with different on-time.
As an improvement of the above scheme, after the LED fault detection data generated during the LED fault detection is read, the stop position of the LED fault detection data is recorded.
As an improvement of the above-described scheme, when the LED failure detection data generated at the time of LED failure detection is read, the reading is started from the stop position recorded in the last target sub-gradation frame.
Correspondingly, the invention also provides an LED fault detection system, which comprises: the identification module is used for sequentially identifying target sub-gray frames, wherein the target sub-gray frames are sub-gray frames with the longest LED extinction time; the starting module is used for sending an LED fault detection starting command to the driving IC in the target sub-gray frame so as to start LED fault detection; a stopping module, configured to send an LED failure detection stopping command to the driving IC to stop the LED failure detection within the target sub-gray frame; the reading module is used for reading the LED fault detection data generated during the LED fault detection in the target sub-gray frame; and the display module is used for sending display data to the drive IC in the target sub-gray scale frame.
As an improvement of the scheme, the identification module determines a sub-gray scale frame with the longest extinction time of the LEDs in the gray scale frame according to gray scale codes, wherein the gray scale frame comprises a plurality of sub-gray scale frames with different on-time.
As an improvement of the above scheme, the reading module records the stop position of the LED fault detection data after reading the LED fault detection data generated during the LED fault detection.
As an improvement of the above solution, when the reading module reads the LED failure detection data generated during the LED failure detection, the reading module starts to read from the stop position recorded in the last target sub-gray frame.
Correspondingly, the invention further provides computer equipment, which comprises a memory and a processor, wherein the memory stores a computer program, and the processor realizes the steps of the LED fault detection method when executing the computer program.
Accordingly, the present invention also provides a computer readable storage medium having a computer program stored thereon, wherein the computer program when executed by a processor implements the steps of the LED fault detection method described above.
The implementation of the invention has the following beneficial effects:
according to the invention, the reading time of the LED fault detection data is dispersed in the sub-gray frames with the longest LED extinction time, the reading time of the LED fault detection data each time is shortened, and the processes of LED fault detection, LED fault detection data reading, display data sending and the like are completed in the sub-gray frames with the longest LED extinction time, so that the normal lighting of an LED lamp is not influenced, and the display interruption problem caused by the LED fault detection process is effectively solved.
Drawings
FIG. 1 is a flow chart of an embodiment of a method of LED failure detection of the present invention;
FIG. 2 is a schematic diagram of an LED drive circuit;
fig. 3 is a schematic diagram of the luminance driving signal a;
fig. 4 is a schematic diagram of the luminance driving signal B;
FIG. 5 is a schematic diagram of an LED failure detection method of the present invention;
fig. 6 is a schematic structural diagram of the LED fault detection system of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present invention more apparent.
Referring to fig. 1, fig. 1 shows a flowchart of an embodiment of the LED fault detection method of the present invention, which includes:
s101, sequentially identifying target sub-gray frames;
the target sub-gray frame is the sub-gray frame with the longest LED turn-off time. Specifically, a sub-gray frame with the longest LED extinction time in a gray frame is determined according to gray coding, wherein the gray frame comprises a plurality of sub-gray frames with different on-times.
As shown in fig. 2, the LED may be driven to operate by a luminance driving signal in general. Wherein, different duty ratios can be recorded by different brightness driving signals, and the duty ratios can directly influence the brightness, and the average duty ratios are the same, so the brightness is the same.
As shown in fig. 3, in the luminance driving signal a, the duty ratio is a=ta/T1;
as shown in fig. 4, in the luminance driving signal B, the average duty ratio is a '= (tb+tc+td)/3T 1, and when tb+tc+td=3ta, a' =a;
therefore, the luminance driving signal a is the same as the luminance represented by the luminance driving signal B.
Correspondingly, the gray scale refers to the specific brightness value of each color lamp bead, and the gray scale code is used for representing the specific brightness value (duty ratio) of each bit (bit); therefore, the sub-gray frame with the longest turn-off time of the LED in the gray frame can be determined according to the gray code.
S102, in a target sub-gray frame, sending an LED fault detection starting command to a driving IC to start LED fault detection;
s103, sending an LED fault detection stopping command to the driving IC to stop LED fault detection in the target sub-gray scale frame;
s104, reading LED fault detection data generated during LED fault detection in a target sub-gray scale frame;
because the LED lamp panel consists of a plurality of LEDs, and the result of reading LED fault detection data one by one is required to be read, the reading of the LED fault detection data takes longer time, so that longer display interruption can be caused; therefore, the invention divides the reading task into a plurality of target sub-gray frames, namely, the LED fault detection data is read in the plurality of target sub-gray frames.
Specifically, the invention performs one-time LED fault detection in each target sub-gray frame, and reads only part of LED fault detection data in each target sub-gray frame until all LED fault detection data are read after a plurality of target sub-gray frames.
Accordingly, in order to avoid repeated reading of the LED fault detection data, the invention records the stop position of the LED fault detection data after reading the LED fault detection data generated during LED fault detection every time. Accordingly, when the LED failure detection data generated at the time of LED failure detection is read again next time, the reading can be started from the stop position recorded in the last target sub-gradation frame. That is, each time the LED fault detection data is read, the stop position of the LED fault detection data is recorded; when the next detection is performed, the LED failure detection data can be read from the stop position.
S105 sends display data to the drive IC.
As shown in FIG. 5, the LED fault detection process (i.e. step S102-step 103), the reading process of the LED fault detection data (i.e. step S104) and the sending process of the display data (i.e. step S105) are all completed within the LED extinction time, and the normal lighting of the LED lamp is not affected, so that the problem of display interruption caused by the LED fault detection process is effectively solved.
Referring to fig. 6, fig. 6 shows a specific structure of an LED fault detection system 100 of the present invention, which includes an identification module 1, a start module 2, a stop module 3, a reading module 4, and a display module 5, specifically:
the identification module 1 is used for sequentially identifying target sub-gray frames; the target sub-gray frame is the sub-gray frame with the longest LED extinction time; the identification module 1 can determine the sub-gray scale frame with the longest LED extinction time in the gray scale frame according to gray scale coding, wherein the gray scale frame comprises a plurality of sub-gray scale frames with different on-time.
The starting module 2 is used for sending an LED fault detection starting command to the driving IC in the target sub-gray scale frame so as to start LED fault detection;
the stopping module 3 is used for sending an LED fault detection stopping command to the driving IC to stop LED fault detection in the target sub-gray scale frame;
the reading module 4 is used for reading LED fault detection data generated during LED fault detection in the target sub-gray frame;
the display module 5 is configured to send display data to the driving IC within the target sub-gradation frame.
The invention divides the reading task into a plurality of target sub-gray frames, namely, the LED fault detection data is read in the plurality of target sub-gray frames. Specifically, the invention performs one-time LED fault detection through the starting module 2 and the stopping module 3 in each target sub-gray frame, and reads only part of LED fault detection data through the reading module 4 in each target sub-gray frame until all LED fault detection data are read after a plurality of target sub-gray frames.
Accordingly, in order to avoid repeated reading of the LED fault detection data, the reading module 4 records a stop position of the LED fault detection data after each reading of the LED fault detection data generated during LED fault detection. Accordingly, the reading module 4 may start reading from the stop position recorded in the last target sub-gray frame when re-reading the LED failure detection data generated at the time of LED failure detection next time. That is, the reading module 4 records the stop position of the LED fault detection data every time the LED fault detection data is read; when the next detection is performed, the LED failure detection data can be read from the stop position.
Therefore, the invention can disperse the reading time of the LED fault detection data in the sub-gray frames with the longest LED extinction time, shorten the reading time of the LED fault detection data each time, finish the processes of LED fault detection, LED fault detection data reading, display data sending and the like in the sub-gray frames with the longest LED extinction time, and not influence the normal lighting of the LED lamp, thereby effectively solving the problem of display interruption caused by the LED fault detection process.
Accordingly, the invention may disclose a computer device comprising a memory and a processor, the memory storing a computer program, wherein the processor implements the steps of the above-mentioned LED fault detection method when executing the computer program. Meanwhile, the invention also discloses a computer readable storage medium, on which a computer program is stored, wherein the computer program realizes the steps of the LED fault detection method when being executed by a processor.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.
Claims (10)
1. An LED fault detection method, comprising:
sequentially identifying target sub-gray frames, and sequentially executing an LED fault detection process in the target sub-gray frames, wherein the target sub-gray frames are sub-gray frames with the longest LED extinction time, and the LED fault detection process comprises:
transmitting an LED fault detection start command to the drive IC to start LED fault detection;
transmitting an LED failure detection stop command to the driving IC to stop the LED failure detection;
reading LED fault detection data generated during the LED fault detection;
and sending display data to the drive IC.
2. The LED fault detection method of claim 1, wherein the identification method of the target sub-gray scale frame comprises: and determining a sub-gray frame with the longest LED extinction time in the gray frame according to the gray coding, wherein the gray frame comprises a plurality of sub-gray frames with different on-time.
3. The LED fault detection method according to claim 1, wherein a stop position of the LED fault detection data is recorded after the LED fault detection data generated at the time of the LED fault detection is read.
4. The LED fault detection method of claim 3, wherein reading is started from a stop position recorded in a last target sub-gradation frame when the LED fault detection data generated at the time of the LED fault detection is read.
5. An LED fault detection system, comprising:
the identification module is used for sequentially identifying target sub-gray frames, wherein the target sub-gray frames are sub-gray frames with the longest LED extinction time;
the starting module is used for sending an LED fault detection starting command to the driving IC in the target sub-gray frame so as to start LED fault detection;
a stopping module, configured to send an LED failure detection stopping command to the driving IC to stop the LED failure detection within the target sub-gray frame;
the reading module is used for reading the LED fault detection data generated during the LED fault detection in the target sub-gray frame;
and the display module is used for sending display data to the drive IC in the target sub-gray scale frame.
6. The LED fault detection system of claim 5, wherein the identification module determines a sub-gray frame having a longest LED off time in a gray frame according to gray scale encoding, the gray frame comprising a plurality of sub-gray frames having different on times.
7. The LED fault detection system of claim 1, wherein the reading module records a stop position of the LED fault detection data after reading the LED fault detection data generated at the time of the LED fault detection.
8. The LED fault detection system of claim 3, wherein the reading module reads the LED fault detection data generated at the time of LED fault detection, starting from a stop position recorded in a previous target sub-gray scale frame.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any of claims 1 to 4 when the computer program is executed.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211547634.XA CN116106718A (en) | 2022-12-05 | 2022-12-05 | LED fault detection method, system, computer equipment and readable storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211547634.XA CN116106718A (en) | 2022-12-05 | 2022-12-05 | LED fault detection method, system, computer equipment and readable storage medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116106718A true CN116106718A (en) | 2023-05-12 |
Family
ID=86253524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211547634.XA Pending CN116106718A (en) | 2022-12-05 | 2022-12-05 | LED fault detection method, system, computer equipment and readable storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116106718A (en) |
-
2022
- 2022-12-05 CN CN202211547634.XA patent/CN116106718A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1273952C (en) | Method and systme for automatically setting display mode of display device, and recording medium thereof | |
| US8288963B2 (en) | LED driving circuit having error detection function | |
| CN112967664B (en) | Drive circuit, display panel, drive method, and storage medium | |
| CN101661696A (en) | Display device and method of driving the same | |
| CN101426323A (en) | Backlight driver and liquid crystal display device including the same | |
| CN111429833B (en) | Method and device for reducing power consumption of LED display screen | |
| CN109949752B (en) | Regional display brightness adjusting method, playing terminal and storage medium | |
| US8184071B2 (en) | LED driver circuit and the method thereof | |
| US20230081173A1 (en) | Photographing method, electronic device, and storage medium | |
| KR100815587B1 (en) | Fault detection device and method for light emitting diode dot matrix module | |
| CN116106718A (en) | LED fault detection method, system, computer equipment and readable storage medium | |
| US20210088575A1 (en) | Diagnosis method of light-emitting device and electronic device | |
| US20090040198A1 (en) | Method for detecting pixel status of flat panel display and display driver thereof | |
| CN201319650Y (en) | Fault detection circuit and electronic equipment | |
| CN1261875C (en) | Data establishing system for display device and control method | |
| CN113643658B (en) | Debugging method of display panel, display device and storage medium | |
| US10561005B1 (en) | Light emitting diode lamp string system with sequencing function and sequencing method | |
| US8294722B2 (en) | Interface apparatus and method | |
| CN117711304A (en) | Real-time open circuit and short circuit detection and protection circuit and LED driving chip | |
| JP2012008570A (en) | Matrix addressing type display system | |
| CN111261090B (en) | System and method for realizing automatic programmable gamma correction | |
| CN116312394A (en) | Method and system for adjusting EPD display gray scale | |
| KR100558245B1 (en) | Vacuum fluorescent display driving circuit | |
| CN112634828A (en) | LED display system, constant current driving circuit and display control method | |
| US12020607B2 (en) | Display apparatus and method of driving the same |
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 |