CN119125962A - A circuit for detecting abnormality of LED module - Google Patents
A circuit for detecting abnormality of LED module Download PDFInfo
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- CN119125962A CN119125962A CN202411117579.XA CN202411117579A CN119125962A CN 119125962 A CN119125962 A CN 119125962A CN 202411117579 A CN202411117579 A CN 202411117579A CN 119125962 A CN119125962 A CN 119125962A
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- signal
- power supply
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- 230000005856 abnormality Effects 0.000 title claims abstract description 17
- 238000001514 detection method Methods 0.000 claims description 35
- 238000013461 design Methods 0.000 abstract description 5
- 230000002159 abnormal effect Effects 0.000 description 14
- 239000003990 capacitor Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 238000012545 processing Methods 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 4
- 239000011324 bead Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
Classifications
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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
-
- 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
- G01R31/40—Testing power supplies
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/56—Testing of electric apparatus
-
- 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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for DC applications
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention belongs to the technical field of LED display screen circuit design and provides a circuit for detecting abnormality of an LED module, which comprises a display screen module and is characterized in that the display screen module comprises an intelligent module, a power supply input, a control output and an LED control circuit, wherein the intelligent module is electrically connected with the power supply input and the output end of a control signal input, and the output end of the intelligent module is electrically connected with the LED control circuit.
Description
Technical Field
The invention belongs to the technical field of LED display screen circuit design, and particularly relates to a circuit for detecting abnormality of an LED module.
Background
The LED display screen is a device for realizing a display effect by utilizing the light emitting characteristic of an LED (light emitting diode), and along with the increase of the market demand of the LED display screen, a large number of display screen products are delivered to a terminal, but because the LED display screen is required to be used for a long time, workers cannot always monitor the use of the display screen, so that the display screen may be damaged due to signal abnormality and power abnormality under severe conditions, and finally, a safety accident is caused.
Therefore, a circuit for detecting the abnormality of the LED module is proposed by those skilled in the art to solve the problem of the background art.
Disclosure of Invention
In order to solve the technical problems, the invention provides a circuit for detecting abnormality of an LED module, which is used for controlling power supply of the module by taking the module as a unit through LED circuit design at a product design end so as to solve the problems in the prior art.
The circuit for detecting the abnormality of the LED module comprises a display screen module and a power supply, and is characterized in that the display screen module comprises an intelligent module, a power supply input, a control output and an LED control circuit, wherein the intelligent module is used for detecting the safety of the power supply and the stability of a signal, and when the power supply is short-circuited or the signal is abnormal, the intelligent module can trigger a short-circuit protection mechanism/adjust the working state of the LED control circuit to realize the protection of the LED module, and when the abnormality is solved, the work can be automatically recovered;
the power input is used for duplicating and providing power for the whole system, and the LED control circuit is used for controlling the state of the LED module.
Preferably, the intelligent module is electrically connected with the output end of the power input and the control signal input, the output end of the intelligent module is electrically connected with the LED control circuit, the power input is connected with the intelligent module to provide power for the intelligent module, the control signal input is connected with the intelligent module to transmit an external control signal to the intelligent module, the intelligent module is connected with the LED control circuit, and the work of the LED control circuit is controlled according to the judgment result of the intelligent module.
Preferably, the intelligent power supply system further comprises a power supply detection module and a signal detection module, wherein the power supply detection module and the signal detection module are respectively and mutually and electrically connected with the intelligent module.
Compared with the prior art, the invention has the following beneficial effects:
1. The invention solves the problem of damage to the display screen caused by the environment by enhancing the reliability of the product, and improves the safety degree of the module;
2. The invention automatically solves the problem that a worker needs to monitor for a long time by monitoring the power supply and the signal of the display screen and encountering abnormal modules, thereby improving the application effect of the display screen module.
Drawings
FIG. 1 is a schematic diagram of an intelligent module for detecting an LED module abnormality circuit according to the present invention;
FIG. 2 is a schematic diagram of a power detection chip according to the present invention;
FIG. 3 is a schematic circuit diagram of a signal detection module according to the present invention;
FIG. 4 is a schematic diagram of a signal amplifying circuit according to the present invention;
FIG. 5 is a schematic diagram of a row driver chip according to the present invention;
FIG. 6 is a schematic diagram of a signal input circuit according to the present invention;
FIG. 7 is a schematic diagram of a column constant current driving chip circuit according to the present invention;
FIG. 8 is a schematic diagram of an LED lamp bead circuit according to the present invention;
FIG. 9 is a flow chart of the power detection module of the present invention;
Fig. 10 is a flow chart of the signal detection module of the present invention.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the invention but are not intended to limit the scope of the invention.
As shown in fig. 1 to 10:
The first embodiment of the invention provides a circuit for detecting abnormality of an LED module, which comprises a display screen module, wherein the display screen module comprises an intelligent module, a power input, a control output and an LED control circuit.
Specifically, the intelligent module is electrically connected with the output end of the power input and the control signal input, and the output end of the intelligent module is electrically connected with the LED control circuit.
The circuit also comprises a power supply detection module and a signal detection module, wherein the power supply detection module and the signal detection module are respectively and mutually and electrically connected with the intelligent module.
As can be seen from the above description and fig. 1, when the power is input to supply power to the system, the intelligent module starts to operate, and when the control signal is input to supply signal to the intelligent module, the intelligent module starts to determine whether the power is abnormal or whether the control signal is abnormal, and this determination process is implemented through two steps of "whether" and "whether there is an abnormality":
1) If the power supply is abnormal, the intelligent module may trigger a short-circuit protection mechanism, so that further damage to the system caused by the power supply fault is avoided;
2) If the control signal is abnormal, the intelligent module can adjust the working state of the LED control circuit to prevent the LED module from being damaged by the abnormal signal;
if the power supply and the control signal are normal, the intelligent module can adjust the working state of the LED module through the LED control circuit according to the instruction of the control signal, so that the safety degree of the module is improved.
Therefore, the system monitors the power supply and the control signal through the intelligent module, ensures that the LED module operates under normal working conditions, and avoids damage caused by abnormal signals or power supply problems.
Referring to fig. 2, fig. 2 shows a power detection chip of a power detection module, which includes a power supply (VCC IN and VCC are two different voltage sources), an input port (VIN), a capacitor, an integrated circuit (I C-E), a control signal (EN), and an output port (VOUT), wherein the input port VIN is connected to an input terminal of the integrated circuit IC-E through the capacitor, the power supplies VCC I N and VCC are connected to a power supply terminal of the integrated circuit I C-E to supply power thereto, the output port VOUT is led out from an output terminal of the integrated circuit IC-E, the control signal EN is connected to a control terminal of the integrated circuit IC-E and is connected to a ground GND through a node, and when the EN signal is active, it forms a path with the ground GND to affect an operation state of the integrated circuit I C-E, the input signal enters the circuit through the filtering function of the capacitor, and then enters the integrated circuit I C-E, the integrated circuit I C-E processes and converts the signal according to its internal circuit and function, and then the control signal VOUT is output to control the operation state of the integrated circuit I C-E to supply power to the power supply voltage of the integrated circuit I C-E.
In combination with fig. 3, fig. 3 shows a signal detection module, wherein the connection modes are that the signal detection module is connected through wires to form different circuit paths, the working principle is that data is input through D I and is output from DO after being processed, a clock signal CLK controls the rhythm of data processing, each operation is ensured to be performed according to a correct sequence and time, a resistor is used for limiting the current so as to protect other elements in the circuit, a power supply VCC provides required electric energy for the whole circuit, and GND provides a common reference potential for the circuit.
Referring to fig. 4, fig. 4 shows a signal amplifying circuit, which shows three different circuit board layouts, each of which includes resistors, capacitors and other electronic components connected together by wires to form a complete circuit, and the functional modules cooperate to realize the functions of the whole circuit by the connection between the components and the transmission of signals.
In connection with fig. 5, fig. 5 shows a row driver chip circuit, in which VCC and VDD are power supply voltages, GND is ground, and each element of the row driver chip circuit is connected to other elements through a specific pin to realize transmission of electric signals or currents, and VCC and GND pins are usually connected to multiple positions in the circuit to provide power supply and reference potential for different parts, and the operating principle is that the VCC is used to realize specific functions by cooperation of the elements, the VCC provides required power supply for the circuit, and GND ensures that current can flow back, other elements such as UU series and CU series may perform tasks such as signal processing, amplifying, controlling, etc., and different pins (such as SD I, SDO, HCLK1, etc.) are responsible for receiving, transmitting data and clock signals to control data flow and operation of the circuit.
Referring to fig. 6, fig. 6 shows a signal input circuit, in which electrical signals are transferred and connected between pins of each element through wires, and the pins may be connected to a power source, a ground wire or other signal lines, so that the whole circuit forms a closed loop to implement a specific function, and the connection between the elements follows the rule of circuit design to ensure that current and signals can flow correctly, and the working principle is that:
The resistor (such as R1I, R, rn13 and the like) plays roles in limiting the current, regulating the voltage or dividing the voltage in the circuit, has a blocking effect on the current according to ohm's law, and can protect other elements in the circuit from being damaged by excessive current;
Capacitors (such as 33pF, 33nE, etc.) are used for storing charges, smoothing voltage fluctuation and playing a role of filtering in the circuit, and can provide stable voltage and current when the circuit works so as to ensure the stable operation of the circuit;
Pins (e.g. JP1, GND, VCC, etc.) are the connection points of the element with external devices or power sources, through which the element can receive external signals or power sources and can also output signals or currents
The circuit has the advantages that the elements are connected through the wires to form a specific circuit structure to realize the transmission and processing of the electric signals, and the elements such as the resistor, the capacitor and the like exert the functions of the elements to jointly maintain the normal operation of the circuit.
Referring to fig. 7, fig. 7 shows a column constant current driving chip circuit, where the elements include a resistor (R), a capacitor (C), a diode (D), an integrated circuit (I C) and other components, and the elements are connected by wires to form a closed circuit path, where the crossing points of the wires generally represent connection points between the elements, and the connection between the different elements realizes current and signal transmission to realize a specific circuit function.
Referring to fig. 8, fig. 8 shows an LED bead circuit, where the components include an Integrated Circuit (IC), a resistor, a capacitor, and a transistor, and connections between the components of the LED bead circuit are made through wires or traces on a circuit board, where the wires or traces connect different component pins to form a closed circuit path, and each component has a specific pin for inputting, outputting, or controlling signals.
In combination with the illustration of fig. 9, fig. 9 shows a power detection module, where the signal processing flow of the power detection module is as follows, when the power detection module starts to work, the state of the E signal can be detected, that is, whether the E signal is normal or not, and according to the detection result, the signal can be split into two paths, that is, one is a "normal E signal" and the other is an "abnormal E signal", when the power detection module works normally, the signal detection module can generate a corresponding control signal, then the control signal is transmitted to the output module, and if the control signal is in a normal state, the output module works normally, but if the control signal is pulled down (that is, the signal becomes a low level or 0 state), the output module stops working, and the module does not light up;
The power supply detection module firstly ensures the validity of power supply and signals, then carries out fine processing on the signals through the signal detection module, the processed signals determine the action of the output module, namely whether the output module is lightened or not, the stability and the reliability of the system are ensured, and especially when abnormal signals are faced, the misoperation of the module can be prevented through the effective management of control signals.
Referring to fig. 10, fig. 10 shows a signal detection module, where when the signal detection module detects a state of a control signal input, if the control signal input is normal, the signal detection module outputs a normal E signal, and when the power detection module is marked as "normal operation", the power detection module can output current, and if the control signal input is abnormal, the module outputs an abnormal E signal, and when the power detection module is marked as "abnormal operation", the power detection module does not operate or cannot operate normally.
In summary, the intelligent module is used for detecting the safety of the power supply and the stability of the signal, when the power supply is short-circuited or the signal is abnormal, the intelligent module triggers the short-circuit protection mechanism/adjusts the working state of the LED control circuit, so as to protect the LED module, and when the abnormality is solved, the work is automatically recovered.
While embodiments of the present invention have been shown and described above for purposes of illustration and description, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411117579.XA CN119125962A (en) | 2024-08-15 | 2024-08-15 | A circuit for detecting abnormality of LED module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411117579.XA CN119125962A (en) | 2024-08-15 | 2024-08-15 | A circuit for detecting abnormality of LED module |
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| Publication Number | Publication Date |
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| CN119125962A true CN119125962A (en) | 2024-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202411117579.XA Pending CN119125962A (en) | 2024-08-15 | 2024-08-15 | A circuit for detecting abnormality of LED module |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201589829U (en) * | 2009-10-31 | 2010-09-22 | 比亚迪股份有限公司 | Liquid crystal display module short circuit detecting system |
| CN102820003A (en) * | 2011-06-09 | 2012-12-12 | 四川柏狮光电技术有限公司 | Intelligent power supply system of high power light emitting diode (LED) display screen module |
| CN104617558A (en) * | 2013-11-01 | 2015-05-13 | 欧姆龙株式会社 | Power supply short circuit protection circuit |
| CN104795025A (en) * | 2015-04-29 | 2015-07-22 | 西安诺瓦电子科技有限公司 | LED display module and method for detecting states thereof |
| CN211318701U (en) * | 2019-11-08 | 2020-08-21 | 苏州华兴源创科技股份有限公司 | Power supply detection circuit of display module |
| CN216212076U (en) * | 2021-10-21 | 2022-04-05 | 深圳极光王科技股份有限公司 | Intelligent monitoring system for realizing renting LED display screen |
| CN115173371A (en) * | 2022-07-19 | 2022-10-11 | 惠州华星光电显示有限公司 | Power supply abnormality detection circuit and display terminal |
| CN117153068A (en) * | 2022-05-23 | 2023-12-01 | 广州视源电子科技股份有限公司 | Abnormality detection device and method for display screen driving circuit, board card and display device |
| WO2023240503A1 (en) * | 2022-06-15 | 2023-12-21 | 北京小米移动软件有限公司 | Display drive module, display device, anomaly processing method and apparatus, and medium |
-
2024
- 2024-08-15 CN CN202411117579.XA patent/CN119125962A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201589829U (en) * | 2009-10-31 | 2010-09-22 | 比亚迪股份有限公司 | Liquid crystal display module short circuit detecting system |
| CN102820003A (en) * | 2011-06-09 | 2012-12-12 | 四川柏狮光电技术有限公司 | Intelligent power supply system of high power light emitting diode (LED) display screen module |
| CN104617558A (en) * | 2013-11-01 | 2015-05-13 | 欧姆龙株式会社 | Power supply short circuit protection circuit |
| CN104795025A (en) * | 2015-04-29 | 2015-07-22 | 西安诺瓦电子科技有限公司 | LED display module and method for detecting states thereof |
| CN211318701U (en) * | 2019-11-08 | 2020-08-21 | 苏州华兴源创科技股份有限公司 | Power supply detection circuit of display module |
| CN216212076U (en) * | 2021-10-21 | 2022-04-05 | 深圳极光王科技股份有限公司 | Intelligent monitoring system for realizing renting LED display screen |
| CN117153068A (en) * | 2022-05-23 | 2023-12-01 | 广州视源电子科技股份有限公司 | Abnormality detection device and method for display screen driving circuit, board card and display device |
| WO2023240503A1 (en) * | 2022-06-15 | 2023-12-21 | 北京小米移动软件有限公司 | Display drive module, display device, anomaly processing method and apparatus, and medium |
| CN115173371A (en) * | 2022-07-19 | 2022-10-11 | 惠州华星光电显示有限公司 | Power supply abnormality detection circuit and display terminal |
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