A method and system for multi-channel high-precision analog signal output

Abstract

This invention provides a multi-channel high-precision analog signal output method and system, comprising the following steps: a host computer specifies an output channel and sets its configuration parameters according to the electrical pulse signal characteristics required for the test panel to display the signal; a control module distributes the corresponding configuration parameters to several signal output modules; all weakly correlated parameters in the configuration parameters of each output channel are distributed to the same signal output module, which configures the weakly correlated parameter for all output channels; all strongly correlated parameters in the configuration parameters of each output channel are distributed to the corresponding signal output module, and all strongly correlated parameters of each output channel are configured by the signal output module containing that output channel; each output channel outputs a corresponding electrical pulse signal to the test panel according to the configured parameters. This invention can meet the synchronous testing requirements of various test panels on the market.

Description

Technical Field

[0001] This invention belongs to the field of screen testing technology, specifically relating to a multi-channel high-precision analog signal output method and system. Background Technology

[0002] After the cell assembly stage of LCD and OLED panels is completed, the CELL panel cutting process requires screen inspection. During this process, abnormalities can easily occur during coating and exposure in the optical process, affecting the normal development of LCD and OLED panels. Generally, to ensure a certain pass rate for LCD and OLED panels before production, they are typically subjected to a backlight test. Only qualified products proceed to the next process, while unqualified products are returned to the manufacturer for repair or discarded.

[0003] Typically, when performing illumination testing on LCD and OLED panels, the process begins with different manufacturing processes. LCD panels control the rotation direction of liquid crystal molecules by changing signals and voltages on the TFT, thereby controlling whether polarized light is emitted from each pixel to achieve color display. OLED panels, on the other hand, control the current through the TFT substrate to control the brightness of the RGB organic film layer, achieving color display as well.

[0004] Currently, CELL Pattern Generators (CELL signal generators) are generally used to provide the different cycle drive signals and high-power drive power signals required to light up the screen. Common applications of CELL Generators include: Aging Test (applying specific voltages, currents, and temperatures to the screen for a certain period of time to accelerate the fusion of organic light-emitting materials and improve their stability and lifespan), AOI / MOI (Auto / Manual Optical Inspection) machines, Gamma parameter adjustment, etc. In existing technologies, due to limitations in the output channels and logic resources of CELL signal generators, different CELL signal generators are needed for different testing requirements in the cell assembly stages of LCD and OLED panels using different processes. Furthermore, a single CELL signal generator can only perform the same test on the same type of panel, resulting in low testing efficiency, high testing costs, and long testing cycles. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the aforementioned background technology and provide a multi-channel high-precision analog signal output method and system that can adapt to the needs of different panel testing applications, has strong applicability and adaptability, and can meet the synchronous testing requirements of various panel displays in the market.

[0006] The technical solution adopted in this invention is: a multi-channel high-precision analog signal output method, comprising the following steps:

[0007] The host computer specifies the output channel and sets its configuration parameters according to the characteristics of the electrical pulse signal required for the panel under test, and then sends the information to the control module.

[0008] The control module distributes the corresponding configuration parameters to several signal output modules;

[0009] The output of each signal output module serves as several output channels; the same weak correlation parameter in the configuration parameters of each output channel is distributed to the same signal output module, which configures the weak correlation parameter for all output channels; the weak correlation parameter includes the slicing period and the output voltage magnitude;

[0010] All strongly correlated parameters in the configuration parameters of each output channel are distributed to the signal output module corresponding to that output channel. All strongly correlated parameters of each output channel are configured by the signal output module where that output channel is located. The strongly correlated parameters include output mode, waveform order and period.

[0011] Each output channel outputs a corresponding electrical pulse signal to the panel under test according to the configured parameters.

[0012] In the above technical solution, the signal output module includes a first signal output module and a second signal output module; the control module identifies specific fields in the received configuration parameters, identifies the configuration parameters of its own application, and configures the output terminal based on the parameters;

[0013] The control module identifies the configuration parameters configured by the first signal output module and the second signal output module, and forwards them to the first signal output module;

[0014] The first signal output module identifies specific fields in the received configuration parameters, distinguishes the configuration parameters configured by the second signal output module, and sends them to the second signal output module.

[0015] In the above technical solution, the signal output module selects the corresponding output mode and waveform at its output terminal by identifying specific fields in the configuration parameters; the output mode includes DC mode and AC mode.

[0016] In the above technical solution, the host computer sets the calibration voltage value and calibration current value and sends them to the voltage and current accuracy calibration module through the control module; the voltage and current accuracy calibration module calibrates the output voltage and current of the signal output module in real time based on the calibration voltage value and calibration current value.

[0017] In the above technical solution, after the control module determines that the panel under test and the signal output module have a valid electrical connection, it then configures itself and distributes configuration parameters to the signal output module.

[0018] In the above technical solution, the control module supplies power to the panel under test through the power module and limits the current of the power module's output power.

[0019] This invention provides a multi-channel high-precision analog signal output system, including a host computer and a slave computer; the slave computer includes a control module and several signal output modules;

[0020] The host computer is used to specify the output channel and set its configuration parameters according to the characteristics of the electrical pulse signal required for the panel under test to display the screen, and then sends the information to the control module.

[0021] The control module is used to distribute corresponding configuration parameters to several signal output modules;

[0022] The output of each signal output module serves as several output channels; the same weak correlation parameter in the configuration parameters of each output channel is distributed to the same signal output module, which configures the weak correlation parameter for all output channels; the weak correlation parameter includes the slicing period and the output voltage magnitude;

[0023] All strongly correlated parameters in the configuration parameters of each output channel are distributed to the signal output module corresponding to that output channel. All strongly correlated parameters of each output channel are configured by the signal output module where that output channel is located. The strongly correlated parameters include output mode, waveform order and period.

[0024] Each output channel outputs a corresponding electrical pulse signal to the panel under test according to the configured parameters.

[0025] In the above technical solution, the signal output module includes a first signal output module and a second signal output module; the control module identifies specific fields in the received configuration parameters, identifies the configuration parameters of its own application, and configures the output terminal based on the parameters, while also identifying the configuration parameters configured by the first and second signal output modules and forwarding them to the first signal output module; the first signal output module identifies specific fields in the received configuration parameters, identifies the configuration parameters configured by the second signal output module, and sends them to the second signal output module; the signal output module selects the corresponding output mode and waveform of its output terminal by identifying specific fields in the configuration parameters; the output mode includes DC mode and AC mode.

[0026] The above technical solution also includes a voltage and current monitoring module; the voltage and current monitoring module collects the output voltage and current of the signal output module in real time and feeds them back to the host computer through the control module.

[0027] The above technical solution also includes a status display module; the status display module collects fault information from the signal output module in real time and displays the fault code by controlling the indicator lights and digital tubes of the panel under test.

[0028] The beneficial effects of this invention are as follows: This invention is applicable to various testing devices with different panels, and its hardware and software system architecture is clear and easy to maintain. The system of this invention has high stability, convenient interface expansion, and can achieve synchronous execution of screen operation for multiple different types of panels and different testing requirements. This invention has multiple output channels, and the output of analog signals has strong stability and high accuracy. This invention can adapt to different application needs, has strong applicability and adaptability, and can meet various market testing requirements. This invention configures different weakly correlated parameters for different signal output modules, enabling the same signal output module to handle the same business process. Modular design conforms to low coupling and high cohesion, making later software architecture maintenance easier and improving troubleshooting efficiency. This invention configures strongly correlated parameters for the signal output modules corresponding to the output channels, ensuring the accuracy of parameter configuration.

[0029] Furthermore, by identifying specific fields, this invention completes the allocation of configuration parameters to various functional modules on the lower-level machine, further improving the efficiency of configuration data distribution and ensuring the processing efficiency of the lower-level machine when dealing with large amounts of data connected to different test panels.

[0030] Furthermore, this invention improves the efficiency of parameter configuration by identifying specific fields and configuring output modes and waveforms. This invention can simultaneously output AC and DC pulses, meeting the screen testing requirements of different display panels.

[0031] Furthermore, this invention further improves the accuracy of the output electrical pulses by ensuring that the voltage and current values ​​of the electrical pulses output by the lower-level machine meet the calibration values ​​set by the upper-level machine.

[0032] Furthermore, before conducting the test, the present invention first identifies whether the display panel under test is effectively connected, ensuring the overall stability and safety of the device.

[0033] Furthermore, this invention simultaneously provides power to the panel under test, meeting the power supply requirements for various screen testing applications.

[0034] Furthermore, this invention monitors the voltage and current values ​​emitted by the signal output module in real time and displays them on a host computer for easy observation by operators, ensuring transparency and safety in the testing process.

[0035] Furthermore, the present invention displays the fault information of the monitored signal output module through the panel under test via the status display module, thereby alerting the staff present and further improving the safety and accuracy of the testing process. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the method flow of the present invention;

[0037] Figure 2 This is a schematic diagram of the system module connections of the present invention;

[0038] Figure 3 This is a schematic diagram of the configuration process for a specific embodiment;

[0039] Figure 4 This is a schematic diagram of the voltage and current calibration process in a specific embodiment;

[0040] Figure 5 This is a schematic diagram of the voltage and current monitoring process in a specific embodiment;

[0041] Figure 6 This is a schematic diagram of the software architecture for a specific embodiment. Detailed Implementation

[0042] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments to facilitate a clear understanding of the present invention, but these descriptions do not constitute a limitation on the present invention.

[0043] like Figure 1 As shown, the present invention provides a method for multi-channel high-precision analog signal output, comprising the following steps:

[0044] The host computer specifies the output channel and sets its configuration parameters according to the characteristics of the electrical pulse signal required for the panel under test, and then sends the information to the control module.

[0045] The control module distributes the corresponding configuration parameters to several signal output modules;

[0046] The output of each signal output module serves as several output channels; the same weak correlation parameter in the configuration parameters of each output channel is distributed to the same signal output module, which configures the weak correlation parameter for all output channels; the weak correlation parameter includes the slicing period and the output voltage magnitude;

[0047] All strongly correlated parameters in the configuration parameters of each output channel are distributed to the signal output module corresponding to that output channel. All strongly correlated parameters of each output channel are configured by the signal output module where that output channel is located. The strongly correlated parameters include output mode, waveform order and period.

[0048] Each output channel outputs a corresponding electrical pulse signal to the panel under test according to the configured parameters.

[0049] Specifically, the signal output module includes a first signal output module and a second signal output module; the control module identifies specific fields in the received configuration parameters, distinguishes the configuration parameters of its own application, and configures the output terminal based on the parameters;

[0050] The control module identifies the configuration parameters configured by the first signal output module and the second signal output module, and forwards them to the first signal output module;

[0051] The first signal output module identifies specific fields in the received configuration parameters, distinguishes the configuration parameters configured by the second signal output module, and sends them to the second signal output module.

[0052] This invention identifies specific fields to allocate configuration parameters to various functional modules on the lower-level machine, further improving the efficiency of configuration data distribution and ensuring the lower-level machine's efficiency in processing large amounts of data when connected to different test panels. Parameters distributed by the upper-level machine are sent to the first signal output module via the control module and then forwarded to the second signal output module, further streamlining the data processing workflow.

[0053] Specifically, the signal output module selects the corresponding output mode and waveform at its output terminal by identifying specific fields in the configuration parameters; the output modes include DC mode and AC mode. This invention further improves the efficiency of parameter configuration by identifying specific fields and configuring the output mode and waveform. This invention can simultaneously output AC pulses and DC pulses, meeting the screen testing requirements of different display panels.

[0054] Specifically, the host computer sets the calibration voltage and calibration current values ​​and sends them to the voltage and current accuracy calibration module via the control module. Based on the calibration voltage and calibration current values, the voltage and current accuracy calibration module calibrates the output voltage and current of the signal output module in real time. This invention further improves the accuracy of the output electrical pulses by ensuring that the voltage and current values ​​of the electrical pulses output by the lower-level computer meet the calibration values ​​set by the host computer.

[0055] Specifically, after determining that the panel under test and the signal output module have a valid electrical connection, the control module configures itself and distributes configuration parameters to the signal output module to ensure the overall stability and safety of the equipment.

[0056] Specifically, the control module supplies power to the panel under test through the power module and limits the current of the output power, thus simultaneously realizing the power supply function of the panel under test, meeting the power supply requirements of various screen tests, and ensuring power supply safety.

[0057] like Figure 2 As shown, the present invention provides a multi-channel high-precision analog signal output system, including a host computer and a slave computer; the slave computer includes a control module and several signal output modules;

[0058] The host computer is used to specify the output channel and set its configuration parameters according to the characteristics of the electrical pulse signal required for the panel under test to display the screen, and then sends the information to the control module.

[0059] The control module is used to distribute corresponding configuration parameters to several signal output modules;

[0060] The output of each signal output module serves as several output channels; the same weak correlation parameter in the configuration parameters of each output channel is distributed to the same signal output module, which configures the weak correlation parameter for all output channels; the weak correlation parameter includes the slicing period and the output voltage magnitude;

[0061] All strongly correlated parameters in the configuration parameters of each output channel are distributed to the signal output module corresponding to that output channel. All strongly correlated parameters of each output channel are configured by the signal output module where that output channel is located. The strongly correlated parameters include output mode, waveform order and period.

[0062] Each output channel outputs a corresponding electrical pulse signal to the panel under test according to the configured parameters.

[0063] Specifically, the signal output module includes a first signal output module and a second signal output module; the control module identifies specific fields in the received configuration parameters, identifies the configuration parameters of its own application, and configures the output terminal based on the parameters, while also identifying the configuration parameters configured by the first and second signal output modules and forwarding them to the first signal output module; the first signal output module identifies specific fields in the received configuration parameters, identifies the configuration parameters configured by the second signal output module, and sends them to the second signal output module; the signal output module selects the corresponding output mode and waveform of its output terminal by identifying specific fields in the configuration parameters; the output modes include DC mode and AC mode.

[0064] Specifically, it also includes a voltage and current monitoring module; the voltage and current monitoring module collects the output voltage and current of the signal output module in real time and feeds them back to the host computer through the control module. This invention monitors the voltage and current values ​​emitted by the signal output module in real time and displays them on the host computer for easy observation by operators, ensuring transparency and safety in the testing process.

[0065] Specifically, it also includes a status display module; the status display module collects fault information of the signal output module in real time and displays the fault code by controlling the indicator lights and digital tubes of the panel under test, so as to alert the staff on site and further improve the safety and accuracy of the testing process.

[0066] The working principle of the present invention will be further explained below with reference to specific embodiments.

[0067] like Figure 6 As shown, the control module, first signal output module, and second signal output module of this invention can be implemented using a SOC platform chip. The control module and the first signal output module can be integrated into the same chip. The function of the control module is implemented through an HPS (Hyper-Power System), executing an ARM program. The function of the first signal output module is implemented through an HPL (Hyper-Power Program), executing a PL-side program. The second signal output module can be implemented using an FPGA (FPGA) to execute the corresponding program. The chip used in this specific embodiment is powerful, with multiple output channels and abundant resources, enabling synchronous electrical connection and synchronous testing of multiple display panels under test.

[0068] The present invention can also select other chips as control modules, first signal output modules and second signal output modules according to actual needs, and can also add signal output modules according to actual needs. This specific embodiment is an application example based on resource configuration and cost considerations.

[0069] like Figure 6 As shown, the control module of this invention provides a series of external interfaces, including RS232 port, Ethernet port, and IP DIP switch setting port, to enable communication with external devices and display information of the output electrical pulses.

[0070] The first signal output module is used to configure the voltage magnitude of all output channels, and the second signal output module is used to configure the slicing period of all output channels. The first signal output module and the second signal output module are respectively used to configure the underlying waveform data of their own output terminals, including: output mode (AC mode or DC mode), waveform order and period.

[0071] To meet the requirements of high-precision analog signal output from multiple channels, the voltage and current accuracy calibration module calibrates the voltage output accuracy and voltage and current monitoring accuracy of the signal output module, ensuring that the voltage output accuracy is within 10mV and the current output accuracy is within 1mA at low power output.

[0072] The voltage and current monitoring module periodically acquires output data from each output channel and reports it to the host computer via the control module. After the user issues a power-on command, the control module retrieves the voltage and current monitoring values ​​of each channel from the voltage and current monitoring module at regular intervals and reports them to the host computer for display according to a predetermined JSON protocol format. The lower-level computer also has a monitoring and control module that controls the voltage and current monitoring module to sequentially acquire the output voltage and current values ​​of each output channel using a polling method. The configuration of the monitoring and control module is completed by the second signal output module.

[0073] In a specific embodiment, the status display module obtains the fault information of the second signal output module in real time through the first signal output module, and generates corresponding display instructions according to the internally set mode based on the received fault information, and sends them to the panel indicator lights and digital tubes of the display panel under test to display clear fault reminder information.

[0074] In a specific embodiment, the control module controls the power supply module to supply power to the display panel under test, and limits the output of the power supply module through the current limiting module to ensure that the power output in the power mode will not damage the display panel and can meet the test requirements.

[0075] In practice, the control module is electrically connected to the display panel under test via the board identification module. After receiving the image slicing command and configuration parameters from the host computer, the control module first releases a detection signal through the board identification module and determines whether the display panel under test has been effectively electrically connected to the first signal output module and the second signal output module based on the signal fed back by the board identification module. If the determination result is yes, the parameter configuration process and the subsequent screen tapping process begin; otherwise, the control module reports to the host computer that the panel electrical connection has failed and does not execute the subsequent process.

[0076] like Figure 3 and Figure 6 As shown, the execution flow of the method program in a specific embodiment includes the following steps:

[0077] The host computer executes the configuration program. The operator selects the appropriate output channel based on the connected display panel under test (DUT) and sets the output parameters for each channel according to the characteristics of the DUT. The specific parameter settings are determined by the operator. These output parameters include: voltage magnitude, refresh rate, waveform order, output mode (AC or DC), waveform cycling, and voltage / current calibration values. Based on the input settings, the host computer generates waveform data, waveform slicing commands, calibration commands, power supply commands, and current limiting commands for each output channel, as well as commands for communication with the lower-level device, as configuration parameters.

[0078] After the operator completes the settings for all output channels, all configuration parameters are sent to the control module.

[0079] After receiving the instruction data, the control module releases the detection signal through the board identification module, and determines whether the display panel under test has been effectively electrically connected to the first signal output module and the second signal output module based on the signal fed back by the board identification module. If the determination result is yes, the parameter configuration process and the subsequent screen tapping process will begin; otherwise, the power supply to the host computer will be notified that the panel electrical connection has failed and the subsequent process will not be executed.

[0080] After the control module determines that a valid electrical connection has been established between the display panel under test and the lower-level machine, it parses the instruction data and reads all configuration parameters. By identifying specific fields, the control module distinguishes between parameters used to configure itself and parameters used to configure the signal output modules. It retains the parameters used to configure itself and forwards the parameters used to configure the two signal output modules to the first signal output module.

[0081] The control module configures its own parameters, including network communication, operating status display, threshold error alarms, and initialization information. By configuring these parameters, the control module ensures the effective operation of its own program, enables communication with the host computer and other external devices, and executes subsequent information uploading, status display, and alarm procedures. The control module configures the monitoring and control module and the voltage and current accuracy calibration module according to calibration instructions. The control module configures the power supply module according to power supply instructions and the current limiting module according to current limiting instructions.

[0082] The data parameters used to configure the signal output module include waveform data and slicing instructions. Waveform data includes voltage magnitude configuration data and underlying waveform description data. The voltage magnitude configuration data is used to configure the voltage magnitude of each output channel. The underlying waveform description data includes information for each output channel, including output mode, waveform order, and period. The slicing instructions are separate slicing period configuration instructions.

[0083] After receiving the configuration parameters, the first signal output module identifies specific fields and retains all voltage configuration data. It distinguishes between the underlying waveform description data corresponding to the first and second signal output modules by identifying the output channel information of the underlying waveform description data. It retains the underlying waveform description data corresponding to the first signal output module and forwards it to the second signal output module via SPI transmission. All waveform trimming instructions in the underlying waveform description data of all output channels are forwarded to the second signal output module.

[0084] The first signal output module configures each output terminal according to the received underlying waveform description data to update the cached waveform description data, and configures the output voltage of the first signal output terminal and the second signal output terminal and prepares for waveform slicing.

[0085] The second signal output module configures each output terminal according to the received underlying waveform description data to update the cached waveform description data and configures the slicing period of the first signal output terminal and the second signal output terminal.

[0086] After the first signal output module and the second signal output module complete all parameter configurations, at the start of the set image slicing cycle, the first signal output module and the second signal output module control their output terminals to output corresponding electrical pulses according to the configured parameters to achieve waveform output.

[0087] If any step in the parameter configuration process fails, the control module reports a failure to slice the waveform to the host computer. Once the first and second signal output modules successfully output the waveform, the control module reports a successful waveform slice to the host computer.

[0088] like Figure 4 As shown, while configuring its own parameters, the control module also configures the voltage and current accuracy calibration module according to the calibration accuracy value set by the operator on the host computer. Simultaneously, while the first and second signal output modules output electrical pulses to the display panel under test, the voltage and current accuracy calibration module calibrates the voltage output accuracy and voltage and current monitoring accuracy of the signal output modules, ensuring that the voltage output accuracy is within 10mV and the current output accuracy is within 1mA at low power output.

[0089] like Figure 5 As shown, while configuring its own parameters, the control module also configures the monitoring control module according to the output channel selected by the operator on the host computer. This allows the monitoring control module to control the voltage and current monitoring module in a polling manner, and the configuration of the monitoring control module is completed by the second signal output module. Simultaneously, while the first and second signal output modules output electrical pulses to the display panel under test, the voltage and current monitoring module sequentially acquires the output voltage and current values ​​of each output channel according to the configured polling method. At regular intervals, the control module acquires the voltage and current monitoring values ​​of each output channel from the voltage and current monitoring module and reports them to the host computer for display according to a predetermined JSON protocol format. The operator can obtain real-time information on the status of the output electrical pulses, ensuring transparency in the testing process.

[0090] While the first signal output module and the second signal output module output electrical pulses to the display panel under test, the control module drives the power supply module to supply power to the display panel under test, and limits the output of the power supply module through the current limiting module to ensure that the power output in the power mode will not damage the display panel and can meet the test requirements.

[0091] This specific embodiment is applicable to various test screen operations for LCD and OLED panels, and has the following advantages: 1) Clear hardware and software system architecture, easy to maintain; 2) High system stability, convenient interface expansion, one device can support simultaneous testing of 10 or more LCD modules (up to 20 panels); 3) Multiple channels, supporting up to 150 channels of high-precision analog output signals, and the output stability and accuracy of the analog signals are strong; 4) Adaptable to different application needs, with strong applicability and adaptability, and can meet the screen testing requirements of various markets.

[0092] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

Claims

1. A multi-channel high-precision analog signal output method, characterized in that: Includes the following steps: The host computer specifies the output channel and sets its configuration parameters according to the characteristics of the electrical pulse signal required for the panel under test, and then sends the information to the control module. The control module distributes the corresponding configuration parameters to several signal output modules; The output of each signal output module serves as several output channels; the same weak correlation parameter in the configuration parameters of each output channel is distributed to the same signal output module, which performs unified configuration of the weak correlation parameter for all output channels; the weak correlation parameter includes the slicing period and the output voltage magnitude; All strongly correlated parameters in the configuration parameters of each output channel are distributed to the signal output module corresponding to that output channel. All strongly correlated parameters of each output channel are configured by the signal output module where that output channel is located. The strongly correlated parameters include output mode, waveform order and period. Each output channel outputs a corresponding electrical pulse signal to the panel under test according to the configured parameters.

2. The method of claim 1, wherein: The signal output module includes a first signal output module and a second signal output module; the control module identifies specific fields in the received configuration parameters, distinguishes the configuration parameters of its own application, and configures the output terminal based on the configuration parameters. The control module identifies the configuration parameters configured by the first signal output module and the second signal output module, and forwards them to the first signal output module; The first signal output module identifies specific fields in the received configuration parameters, distinguishes the configuration parameters configured by the second signal output module, and sends them to the second signal output module.

3. The method of claim 1, wherein: The signal output module selects the corresponding output mode and waveform at its output terminal by identifying specific fields in the configuration parameters; the output modes include DC mode and AC mode.

4. The method of claim 1, wherein: The host computer sets the calibration voltage and calibration current values ​​and sends them to the voltage and current accuracy calibration module through the control module; the voltage and current accuracy calibration module calibrates the output voltage and current of the signal output module in real time based on the calibration voltage and calibration current values.

5. The method of claim 1, wherein: After determining that the panel under test and the signal output module have a valid electrical connection, the control module then configures itself and distributes configuration parameters to the signal output module.

6. The method according to claim 1, characterized in that: The control module supplies power to the panel under test through the power module and limits the current output of the power module.

7. A multi-channel high-precision analog signal output system, characterized in that: It includes a host computer and a slave computer; the slave computer includes a control module and several signal output modules; The host computer is used to specify the output channel and set its configuration parameters according to the characteristics of the electrical pulse signal required for the panel under test to display the screen, and then sends the information to the control module. The control module is used to distribute corresponding configuration parameters to several signal output modules; The output of each signal output module serves as several output channels; the same weak correlation parameter in the configuration parameters of each output channel is distributed to the same signal output module, which performs unified configuration of the weak correlation parameter for all output channels; the weak correlation parameter includes the slicing period and the output voltage magnitude; All strongly correlated parameters in the configuration parameters of each output channel are distributed to the signal output module corresponding to that output channel. All strongly correlated parameters of each output channel are configured by the signal output module where that output channel is located. The strongly correlated parameters include output mode, waveform order and period. Each output channel outputs a corresponding electrical pulse signal to the panel under test according to the configured parameters.

8. The system according to claim 7, characterized in that: The signal output module includes a first signal output module and a second signal output module; the control module identifies specific fields in the received configuration parameters, identifies the configuration parameters of its own application, and configures the output terminal based on the configuration parameters. Simultaneously, it identifies the configuration parameters configured by the first and second signal output modules and forwards them to the first signal output module; the first signal output module identifies specific fields in the received configuration parameters, identifies the configuration parameters configured by the second signal output module, and sends them to the second signal output module; the signal output module selects the corresponding output mode and waveform of its output terminal by identifying specific fields in the configuration parameters; the output modes include DC mode and AC mode.

9. The system according to claim 7, characterized in that: It also includes a voltage and current monitoring module; the voltage and current monitoring module collects the output voltage and current of the signal output module in real time and feeds them back to the host computer through the control module.

10. The system according to claim 7, characterized in that: It also includes a status display module; the status display module collects fault information from the signal output module in real time and displays the fault code by controlling the indicator lights and digital tubes on the panel under test.

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