LED backlight driving module detection system

Abstract

The utility model relates to an LED backlight driving module detection system. The LED backlight driving module detection system comprises an upper computer, a measurement control unit and a current detection unit. The upper computer is connected with the signal input and output end of the measurement control unit; a first detection end of the measurement control unit is used for being connected with a first pole of a backlight driving module, a second detection end of the measurement control unit is used for being connected with a second pole of the backlight driving module, the current detection unit is used for being connected with the backlight driving module in series, and a voltage output end of the current detection unit is connected with a third detection end of the measurement control unit. The measurement control unit detects the voltage at the two ends of the backlight driving module, the current of the backlight driving module is detected through the current detection unit, the measurement control unit uploads measured voltage value and current value data to the upper computer, and the upper computer stores the measured voltage value and current value data or sends the measured voltage value and current value data to the data storage unit for storage. Compared with traditional manual detection, a universal meter is not needed for detection, and the detection efficiency is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of backlight drive module testing, in particular to an LED backlight drive module detection system. Background Art

[0002] The backlight drive module of the TV needs to be tested before leaving the factory. At present, the performance indicators of the TV motherboard power supply are mainly tested manually using a multimeter. This measurement method has a relatively low measurement efficiency, and the voltage and current data after measurement cannot be conveniently and effectively saved, which makes it inconvenient to trace the measurement of the product. Utility Model Content

[0003] Based on this, it is necessary to provide a LED backlight drive module detection system.

[0004] A LED backlight drive module detection system includes: a host computer, a measurement control unit and a current detection unit;

[0005] The host computer is connected to the signal input and output terminals of the measurement control unit;

[0006] The first detection end of the measurement control unit is used to connect to the first pole of the backlight driving module, the second detection end of the measurement control unit is used to connect to the second pole of the backlight driving module, the current detection unit is used to be connected in series with the backlight driving module, and the voltage output end of the current detection unit is connected to the third detection end of the measurement control unit.

[0007] In one embodiment, it further includes multiple control switches, one end of each control switch is used to connect to a power supply, the second end of each control switch is used to connect to a backlight driving module, and the control end of each control switch is connected to a control end of the measurement control unit.

[0008] In one embodiment, the control switch comprises a relay.

[0009] In one embodiment, the measurement control unit includes a GD32 single chip microcomputer.

[0010] In one embodiment, the current detection unit comprises a Hall current sensor.

[0011] In one embodiment, the model of the Hall current sensor is ACS712.

[0012] In one embodiment, the current input end of the Hall current sensor is used to connect to the first pole of the power supply, the current output end of the Hall current sensor is used to connect to the first pole of the backlight driving module, and the second pole of the backlight driving module is connected to the second pole of the power supply.

[0013] In one embodiment, a data storage unit is further included, and the host computer is connected to the data storage unit.

[0014] In one embodiment, the host computer is connected to the signal input and output terminals of the measurement control unit via a serial port.

[0015] The above-mentioned LED backlight drive module detection system sends a control instruction to the measurement control unit through the host computer to control the measurement control unit to work. The measurement control unit detects the voltage at both ends of the backlight drive module and detects the current of the backlight drive module through the current detection unit. The measurement control unit uploads the measured voltage and current value data to the host computer, which is saved by the host computer or sent to the data storage unit for storage. Compared with traditional manual detection, there is no need to use a multimeter for detection, which effectively improves the detection efficiency, so that the voltage and current data after measurement can be conveniently and effectively saved, which is conducive to the measurement traceability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 A schematic diagram of a logic framework of an LED backlight driving module detection system according to an embodiment;

[0018] Figure 2 A schematic diagram of a circuit diagram of some components of an LED backlight driving module detection system according to an embodiment;

[0019] Figure 3 The figure is a schematic diagram of a test flow of an LED backlight driving module detection system according to an embodiment. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] like Figure 1 and Figure 2As shown, it is an LED backlight driving module detection system of an embodiment of the utility model, including: a host computer, a measurement control unit and a current detection unit; the host computer is connected to the signal input and output ends of the measurement control unit; the first detection end of the measurement control unit is used to connect to the first pole of the backlight driving module, the second detection end of the measurement control unit is used to connect to the second pole of the backlight driving module, the current detection unit is used to be connected in series with the backlight driving module, and the voltage output end of the current detection unit is connected to the third detection end of the measurement control unit.

[0022] In this embodiment, the TV mainboard (backlight drive module) may include one set of LED lamp beads, or may include two sets of LED lamp beads. In this embodiment, the backlight drive module includes two sets of LED lamp beads, each set of LED lamp beads includes a plurality of LED (light-emitting diode, light-emitting diode) lamp beads connected in series, such as Figure 2 As shown, LED1 is a group of LED lamp beads, LED2 is a second group of LED lamp beads, LED1+ is the positive pole of the first group of LED lamp beads, LED1- is the negative pole of the first group of LED lamp beads, LED2+ is the positive pole of the second group of LED lamp beads, and LED2- is the negative pole of the second group of LED lamp beads.

[0023] Therefore, when multiple LED lamp beads are connected in series, the positive pole of the LED lamp bead at one end is the positive pole of the backlight driving module, and the negative pole of the LED lamp bead at the other end is the negative pole of the backlight driving module. In this embodiment, the first pole of the backlight driving module can be the positive pole or the negative pole. Similarly, the second pole of the backlight driving module can be the negative pole or the positive pole.

[0024] In this embodiment, each LED lamp board of the backlight driving module includes 30 LED lamp beads connected in series, and the applicable voltage range is 2.7 to 3.6V, and the maximum current does not exceed 600mA.

[0025] The measurement control unit has multiple detection channels, each detection channel includes a first detection end and a second detection end, and the first detection end and the second detection end of the same detection channel are respectively connected to the two ends (two poles) of a group of LED lamp beads, and the voltage detection of the LED lamp beads can be realized by detecting the resistance voltage division between the positive and negative electrodes of the LED lamp beads. Specifically, Figure 2 As shown, LED1+ is connected to the V_DETE_LED1+ pin of the measurement control unit, LED1- is connected to the V_DETE_LED1- pin of the measurement control unit, LED2+ is connected to the V_DETE_LED2+ pin of the measurement control unit, and LED2- is connected to the V_DETE_LED2- pin of the measurement control unit.

[0026] For example, the measurement control unit includes a PA7 detection channel and a PA6 detection channel, wherein the upper bias resistor R2 is 750KΩ and the lower bias resistor R1 is 10KΩ. The measurement control unit measures the voltage value Ua of the PA7 channel, according to the formula: , (U+) is the LED positive pole (LED+) voltage. In addition, the voltage value Ub of the PA6 channel is measured at the same time, according to the formula: , ( U ) is the negative pole of LED (LED ) voltage. Therefore, the final voltage value is given by the formula: ] = (Ua - Ub) * 76, from which the actual LED lamp voltage value, that is, the voltage value of the TV motherboard (backlight driver module) can be measured.

[0027] The current detection unit is used to measure the current of the LED lamp beads connected in series, and the host computer reads the current detected by the current detection unit through the measurement control unit. Specifically, the host computer reads the current detected by the current detection unit through the measurement control unit to determine whether the detected current reaches the preset standard current.

[0028] In one embodiment, the host computer is connected to the signal input and output terminals of the measurement control unit via a serial port. In this embodiment, the measurement control unit receives control instructions from the host computer, operates according to the control instructions from the host computer, and measures the voltages at the two poles of the LED lamp beads of the backlight drive module.

[0029] In one embodiment, the LED backlight drive module detection system further includes a data storage unit, and the host computer is connected to the data storage unit. In one embodiment, the data storage unit includes an MES system. In one embodiment, the LED backlight drive module detection system further includes an MES system, and the MES system is connected to the host computer, and the MES system is used to receive data sent from the host computer.

[0030] In one embodiment, the data storage unit includes a memory, the host computer is connected to the memory, and the memory is used to store data sent by the host computer.

[0031] In this embodiment, the host computer reads the voltage and current of the two poles of the LED lamp bead by controlling the measurement control unit, calculates the voltage and current values ​​of the load provided by the TV mainboard, determines whether the voltage and current values ​​are within a reasonable range, and uploads the voltage and current values ​​to the MES system (database) for traceability.

[0032] In order to improve the measurement efficiency of the backlight driving module, in one embodiment, the detection system also includes a plurality of control switches (not shown), one end of each of the control switches is used to be connected to a power supply, the second end of each of the control switches is used to be connected to a backlight driving module, and the control end of each of the control switches is connected to a control end of the measurement control unit.

[0033] In this embodiment, the measurement control unit of the detection system can be connected to multiple backlight driving modules at the same time. The measurement control unit is connected to each backlight driving module through multiple control switches respectively. The measurement control unit receives the instruction of the host computer, responds to the instruction to control the corresponding control switch to be turned on, and controls other control switches to be turned off, so that only one backlight driving module is powered on each time measurement is performed. In this way, by controlling the on and off of each control switch, the measurement control unit and the current detection unit can measure the voltage and current of each backlight driving module in turn, which can effectively improve the measurement efficiency.

[0034] In order to realize the on-off control of the control switch, in one embodiment, the control switch includes a relay. In this embodiment, one end of each of the relays is used to connect to the power supply, the second end of each of the relays is used to connect to a backlight driving module, and the control end of each of the relays is connected to a control end of the measurement control unit, so that the measurement control unit controls the relay to be attracted, so that the relay is turned on. In this embodiment, the positive poles of the LED lamp beads of each backlight driving module are connected together, and the negative poles are connected to the power supply through the relay, so that each relay can control the LED lamp beads of a backlight driving module.

[0035] In one embodiment, the measurement control unit includes a GD32 single-chip microcomputer. In this embodiment, each GPIO port of the GD32 single-chip microcomputer is connected to a relay, the relay is low level effective (conducting), and each relay is connected to the negative poles of two LED light boards (two groups of LED lamp beads). In this way, through a relay, the GD32 single-chip microcomputer can control the operation of two LED light boards at the same time.

[0036] In one embodiment, the current detection unit comprises a Hall current sensor. Figure 2 As shown, the model of the Hall current sensor is ACS712. In this embodiment, the PA5 pin of the GD32 microcontroller is connected to the Vout pin of the Hall current sensor ACS712.

[0037] In this embodiment, the current detection is calculated by the voltage △V that jumps after the ACS712 Hall current sensor detects: ① The output voltage is VCC / 2 when no-load (the light board is not on); ② After the current passes through with load, the output voltage is 0.185*I+VCC / 2. In the no-load state, the value of VCC / 2 may vary depending on the chip model and power supply. Therefore, the PA5 pin of the GD32 microcontroller is selected to connect to the Vout pin of the ACS712 chip, and the ADC voltage value Vb of the pin in the no-load state is read. Figure 2 As shown,

[0038] After the LED lamp bead is loaded and stable, read the ADC voltage value Vt of the pin again. The difference between the two is obtained, △V = Vt - Vb, and the final current value is obtained by the formula △V = I*0.185, where 0.185 refers to the ACS712 Hall current sensor. When the current changes by 1A, the corresponding voltage will increase or decrease by 0.185V. This value represents the coefficient of change between current and voltage. In this way, the measurement control unit detects the voltage of Vout of the Hall current sensor ACS712, calculates △V through the above calculation formula, and can calculate the current value.

[0039] In one embodiment, the current input end of the Hall current sensor is used to connect to the first pole of the power supply, the current output end of the Hall current sensor is used to connect to the first pole of the backlight driving module, and the second pole of the backlight driving module is connected to the second pole of the power supply. In this embodiment, the Hall current sensor is connected in series with each LED lamp bead of the backlight driving module, such as Figure 2 As shown, the current detection unit includes two Hall current sensors ACS712, chips U204 and U205 respectively, wherein the positive pole of LED1 is connected to the positive pole of the power supply LED1+, the negative pole of LED1 is connected to the IP+ pin of the chip U204, the IP- pin of the chip U204 is connected to the negative pole of the power supply LED1-, the positive pole of LED2 is connected to the positive pole of the power supply LED2+, the negative pole of LED2 is connected to the IP+ pin of the chip U205, and the IP- pin of the chip U205 is connected to the negative pole of the power supply LED2-. In this way, each Hall current sensor ACS712 detects the current of a group of LED lamp beads respectively.

[0040] In this embodiment, the VCC pin of the Hall current sensor ACS712 is connected to a 5V power supply, the FILTER pin of the Hall current sensor ACS712 is grounded through a first capacitor, and the GND pin of the Hall current sensor ACS712 is grounded.

[0041] In order to more accurately measure the voltage of the LED lamp beads of the backlight driving module, in one embodiment, Figure 2As shown, the first detection end of the first channel of the measurement control unit is connected to the positive electrode of the first group of LED lamp beads through the first resistor RM70, and the second detection end of the first channel of the measurement control unit is connected to the negative electrode of the first group of LED lamp beads through the second resistor RM75; the first detection end of the second channel of the measurement control unit is connected to the positive electrode of the second group of LED lamp beads through the third resistor RM67, and the second detection end of the second channel of the measurement control unit is connected to the negative electrode of the second group of LED lamp beads through the fourth resistor RM73. It should be understood that the resistance values ​​of the first resistor RM70, the second resistor RM75, the third resistor RM67 and the fourth resistor RM73 are known. Therefore, according to the voltage division of the first resistor RM70, the second resistor RM75, the third resistor RM67 and the fourth resistor RM73, the voltage of the first group of LED lamp beads and the second group of LED lamp beads can be accurately calculated.

[0042] In one embodiment, the first detection end of the first channel of the measurement control unit is grounded through the fifth resistor RM69, the second detection end of the first channel of the measurement control unit is grounded through the sixth resistor RM74, the first detection end of the second channel of the measurement control unit is grounded through the seventh resistor RM68, and the second detection end of the second channel of the measurement control unit is grounded through the eighth resistor RM72. The ground voltage divider of the fifth resistor RM69, the sixth resistor RM74, the seventh resistor RM68 and the eighth resistor RM72 makes the measurement result of the measurement control unit more accurate.

[0043] In one embodiment, the resistance of the fifth resistor RM69, the sixth resistor RM74, the seventh resistor RM68 and the eighth resistor RM72 are smaller than the resistance of the first resistor RM70, the second resistor RM75, the third resistor RM67 and the fourth resistor RM73, so that the fifth resistor RM69, the sixth resistor RM74, the seventh resistor RM68 and the eighth resistor RM72 can be grounded for voltage division, and the impact on the measurement results can be reduced.

[0044] In one embodiment, the LED backlight drive module detection system includes a GD32 single-chip microcomputer, a host computer, and an MES system. The GD32 single-chip microcomputer is mainly used to detect voltage values ​​and perform related controls. In this system, a part of its GPIO ports is connected to relays, which are valid at low levels and can control the load status of two LED light boards. Each LED light board contains 30 LED lamp beads and is connected in series. Its applicable voltage range is 2.7 to 3.6V, and the maximum current does not exceed 600mA. The positive poles of all LED lamp beads are connected together, and the negative poles are connected after being turned on by a specific relay, so that each relay can control a specific number of lamp beads. At present, the single-chip microcomputer board can effectively control 24 relays, which are divided into two groups, each with 12, and the number of lamp beads controlled for each lamp board is 8, 10, 12, 15, 16, 18, 20, 21, 24, 25, 28, and 30, respectively, to meet the needs of single-channel and dual-channel voltage and current testing of the TV motherboard.

[0045] The GD32 MCU receives the command sent by the host computer through the serial port, parses the command and controls the corresponding relay. At this time, the TV mainboard power supplies power to the LED light board, making it fully lit and maintain a stable state. Once the light board is lit and stable, the MCU starts to read the ADC voltage value for a period of time to obtain accurate measurement data. The read voltage value is averaged and passed through the set conversion formula to obtain the corresponding voltage and current data.

[0046] The voltage detection is realized by using the MCU ADC to read the resistor voltage divider between the positive and negative poles of the LED. Among them, the upper bias resistor R2 is 750KΩ, and the lower bias resistor R1 is 10KΩ. The ADC voltage value Ua of the PA7 channel is read through programming, and the formula is: Ua =R1 / (R1+R2)(U+), (U+) is the LED+ voltage. Similarly, the ADC voltage value Ub of the PA6 channel is read, and the formula is: Ub =R1 / (R1+R2)(U-), (U-) is the LED-voltage. The final voltage value is obtained by the formula: [(U+)- (U-)]=(Ua - Ub)*76, from which the actual lamp bead voltage value, that is, the voltage value of the TV motherboard, can be measured.

[0047] The current detection is calculated by the voltage △V that jumps after the ACS712 Hall current sensor detects. ① When there is no load (the light board is not on), the output voltage is VCC / 2; ② After the current is passed through with load, the output voltage is 0.185*I+VCC / 2. In the no-load state, the value of VCC / 2 may vary depending on the chip model and power supply. Therefore, the PA5 pin of the GD32 microcontroller is selected to connect to the Vout pin of the ACS712 chip, and the ADC voltage value Vb of the pin in the no-load state is read. After the LED lamp bead is loaded and stable, the ADC voltage value Vt of the pin is read again. The difference between the two is obtained, △V =Vt - Vb, and the final current value is obtained by the formula △V = I*0.185. The 0.185 refers to the ACS712 Hall current sensor. When the current changes by 1A, the corresponding voltage will increase or decrease by 0.185V. This value represents the coefficient of change between current and voltage.

[0048] After obtaining the voltage and current data, the MCU sends the data back to the host computer through the serial port for further analysis, display or recording. After completing the data transmission, the MCU is ready to start the next round of detection, waiting for the serial port to receive new relay instructions, and executing the above steps in a loop.

[0049] The automatic control and measurement method using the GD32 single-chip microcomputer can completely replace manual measurement using a multimeter, which not only improves the efficiency of detection, but also greatly improves the accuracy and reliability of measurement, ensuring the quality of the product. Compared with manual measurement, the GD32 single-chip microcomputer can automatically control and measure according to preset programs and algorithms, eliminating the influence of human errors and subjective factors, while also greatly simplifying the operation process and improving the consistency and repeatability of measurement.

[0050] As the interactive hub of control instructions and data, the host computer plays an important role in this process. First, the host computer is responsible for the configuration of serial port communication to ensure reliable data transmission with the GD32 microcontroller. At the same time, the host computer stores a table of each TV motherboard backlight solution locally, which contains the reasonable voltage and current range of each solution, which is convenient for the subsequent update and management of the motherboard solution. Before testing, the host computer will match the solution of the tested motherboard with the solution in the table. The host computer sends a start test command to the GD32 microcontroller and waits for it to send data. After receiving the data, the host computer will judge whether the power supply performance of the tested TV motherboard is good or not according to the specified voltage and current range. Such automated test judgment replaces manual judgment, greatly reduces the probability of misjudgment, improves product output and work efficiency, and also provides more accurate and consistent judgment standards, making power supply performance testing more reliable and stable.

[0051] The MES system is a database used to manage and track data in the manufacturing process. It allows the storage of various data generated in the production process and provides interfaces for data upload, retrieval and analysis. Traditional testing methods usually only save test data locally, or simply do not save data. This may lead to incomplete or even lost data during data tracking and analysis. In order to solve this problem, the host computer communicates and integrates with the MES system, and the measured data obtained during the test process is uploaded to the MES system through the API interface provided by the MES system. By uploading relevant content such as test time, tester, data, etc. to the MES system, the operator can view the final test data anytime and anywhere. Such integration makes data storage and management more reliable and convenient. Operators can quickly access and analyze data when needed for quality control and process optimization.

[0052] The purpose of this system is to optimize and upgrade the traditional test method, using the GD32 microcontroller for voltage detection and control. The host computer is responsible for sending instructions and receiving data as an interactive hub, and the MES system is used for data storage and management. The system realizes automated control and measurement, improves efficiency and accuracy, and reduces human errors. The integration of the host computer and the MES system makes data storage and management more reliable and convenient, and supports quality control and process optimization. The application of this automation system is of great significance to improving production efficiency and product quality.

[0053] Please combine Figure 3 ,The specific test process of this system is as follows:

[0054] 1. After the microcontroller is powered on, the LED load initialization, ADC conversion initialization, USART serial port communication initialization, and system clock initialization are completed; after the initialization is completed, the voltage data of the TV motherboard when it is unloaded is first obtained as the reference value V0 for calculating the voltage and current after the LED lamp load is turned on. At this time, the LED lamp load is off and has not received the command from the host computer to turn on the LED lamp;

[0055] 2. The host computer configures the serial port, parses the backlight solution table, and generates corresponding instructions according to the motherboard backlight solution. For example, if the motherboard solution 1 requires twelve lamp beads in a single channel, the instruction AC00083103120104 is generated, and the SN code scan is completed to generate AC00083103000611. The two instructions are sent to the MCU. After the MCU receives them, the motherboard supplies power to the LED lamp load. During this process, when the voltage and current have a slight jump at the same time, the MCU starts to read the value of the corresponding ADC channel within a period of time, calculates the average value through the root mean square method and V0, and obtains the final data with the above formula for calculating voltage and current, and converts the data into ASCII code and sends it to the host computer.

[0056] 3. When the host computer receives the voltage and current data transmitted by the MCU, it will analyze the data and determine whether it is within the specified range. If the data is within the specified range, the host computer will display "PASS" on the interface to indicate that the measured data has passed the test. If the data is not within the specified range, the host computer will display "NG" to indicate that it has not passed. Through automated testing, the staff only needs to observe the data results displayed by the host computer to quickly determine whether the power supply performance of the TV motherboard is good. This method simplifies the test process, improves efficiency, and makes the judgment process more convenient and reliable.

[0057] 4. The host computer uploads the test results, time, test personnel and other data to the MES system. The administrator can log in to the system at any time to view all the test data to avoid data loss. In addition, the MES system also has a data analysis function that can analyze all the data to provide clearer and more detailed information. In this way, the administrator can monitor and manage the test data more effectively and make more informed decisions.

[0058] This application combines the use of a single-chip microcomputer and a host computer to automatically detect voltage and current, display the measurement results on the host computer, and upload them to the MES system for analysis and storage.

[0059] It is simpler, the single chip will automatically cycle and take the voltage and current data required for measurement, and there is no need to manually use a multimeter to measure;

[0060] Smarter, use commands to control the time of data acquisition, and you can automatically obtain data by just scanning the code;

[0061] More convenient, data is uploaded to the MES system for storage, and administrators can view all information anytime and anywhere by logging into the system.

[0062] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A LED backlight drive module detection system, characterized in that: include: Host computer, measurement control unit and current detection unit; The host computer is connected to the signal input and output terminals of the measurement control unit; The first detection end of the measurement control unit is used to connect to the first pole of the backlight driving module, the second detection end of the measurement control unit is used to connect to the second pole of the backlight driving module, the current detection unit is used to be connected in series with the backlight driving module, and the voltage output end of the current detection unit is connected to the third detection end of the measurement control unit.

2. The LED backlight drive module detection system according to claim 1, characterized in that: It also includes multiple control switches, one end of each control switch is used to connect to a power supply, the second end of each control switch is used to connect to a backlight driving module, and the control end of each control switch is connected to a control end of the measurement control unit.

3. The LED backlight drive module detection system according to claim 2, characterized in that: The control switch includes a relay.

4. The LED backlight drive module detection system according to claim 1, characterized in that: The measurement control unit includes a GD32 single chip microcomputer.

5. The LED backlight driving module detection system according to claim 1, characterized in that: The current detection unit includes a Hall current sensor.

6. The LED backlight driving module detection system according to claim 5, characterized in that: The model of the Hall current sensor is ACS712.

7. The LED backlight drive module detection system according to claim 6, characterized in that: The current input end of the Hall current sensor is used to connect to the first pole of the power supply, the current output end of the Hall current sensor is used to connect to the first pole of the backlight driving module, and the second pole of the backlight driving module is connected to the second pole of the power supply.

8. The LED backlight driving module detection system according to claim 2, characterized in that: It also includes a data storage unit, and the host computer is connected to the data storage unit.

9. The LED backlight drive module detection system according to any one of claims 1 to 8, characterized in that: The host computer is connected to the signal input and output terminals of the measurement control unit via a serial port.

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