Automatic test system of display screen

Abstract

The utility model discloses an automatic test system of a display screen. The automatic test system comprises a data communication unit, a main control module, a CANFD transmit-receive unit, a current acquisition module, a level detection module, a brightness acquisition module, an equipment interface, a serial interface and a power supply module. The data communication unit is adopted to achieve data communication between the upper computer and the main control module, the upper computer sends a corresponding instruction to the main control module, the main control module controls information collection and sends the collected information to the upper computer, then automatic testing is achieved, multiple function testing can be considered, and compared with conventional manual testing, the testing efficiency is improved. And the test efficiency and the test precision of the display screen test are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of display screen testing, in particular to an automatic testing system for a display screen. Background Technique

[0002] With the development of society and the progress of technology, highly intelligent and information-based electronic devices are changing with each passing day. As an important component of electronic devices, the display screen can realize various functions and improve the use experience of electronic devices.

[0003] Before leaving the factory, the display screen generally needs to be subjected to functional tests to verify whether it can work properly. Traditional testing equipment generally uses a single-chip microcomputer testing system, and the testing functions are relatively single (for example, only supporting CAN message testing or serial port testing), and the degree of automation is low. For example, when performing CAN message testing, it relies on manual comparison, which is prone to misjudgment and wrong judgment, resulting in a time-consuming and laborious testing process, and also having relatively high requirements for the professional level of testers, and is not suitable for the testing scenarios of diversified display screens.

[0004] Therefore, the purpose of this application is to provide an automatic testing system for a display screen that solves at least one of the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to design an automatic testing system for a display screen to solve the above-mentioned technical deficiencies.

[0006] The utility model designs an automatic testing system for a display screen, which includes a data communication unit, a main control module, a CANFD transceiver unit, a current acquisition module, a level detection module, a brightness acquisition module, a device interface, a serial interface, and a power supply module;

[0007] The data communication unit, the CANFD transceiver unit, the current acquisition module, the level detection module, the brightness acquisition module, the device interface, the serial interface, and the power supply module are respectively electrically connected to the main control module. The data communication unit is connected to the upper computer. The current acquisition module, the level detection module, the device interface, and the power supply module are respectively electrically connected to the input power supply. The CANFD transceiver unit, the device interface, and the serial interface are respectively electrically connected to the display screen to be tested. The brightness acquisition module is arranged on the display screen;

[0008] The current acquisition module is used to collect the working current information of the display screen and send it to the main control module; the level detection module is used to detect the high and low level state information of the output port of the main control module and send it to the main control module; the brightness acquisition module is used to collect the brightness information of the display screen and send it to the main control module;

[0009] The CANFD transceiver unit is used to receive the message information of the display screen and send it to the main control module;

[0010] The serial interface is used to receive the corresponding serial port print information of the display screen and send it to the main control module;

[0011] The main control module is used to control the information collection of the display screen and the main control module according to the instructions sent by the host computer, and send the collected information to the host computer. The collected information includes message information, serial port print information, working current information, high and low level status information, and brightness information;

[0012] The host computer is used to send instructions to the main control module, and is also used to compare the received collected information with the corresponding preset information to obtain the test result;

[0013] The data communication unit is used to establish a communication connection between the host computer and the main control module.

[0014] Preferably, the automatic test system further includes a driving module and a switching unit; the driving module is electrically connected to the main control module and the switching unit respectively, and the switching unit is electrically connected to the input power supply and the device interface respectively.

[0015] Preferably, the device interface includes a Batt interface and an IGN interface which are respectively electrically connected to the display screen, and the switching unit includes a first relay unit and a second relay unit which are respectively electrically connected to the driving module;

[0016] One end of the Batt interface is electrically connected to one end of the first relay unit, one end of the IGN interface is electrically connected to one end of the second relay unit, and the input power supply is electrically connected to the other ends of the first relay unit and the second relay unit respectively.

[0017] Preferably, the brightness acquisition module includes a photosensitive interface electrically connected to the main control module, and an ambient light sensor is externally connected to the photosensitive interface.

[0018] Preferably, there are at least two CANFD transceiver units, current acquisition modules, level detection modules, brightness acquisition modules, device interfaces, and serial interfaces respectively.

[0019] Preferably, the data communication unit is an Ethernet communication unit.

[0020] Preferably, the Ethernet communication unit includes a data transmission module and a communication interface which are connected to each other. The data transmission module is electrically connected to the main control module, and the communication interface is connected to the host computer.

[0021] Preferably, the display screen is at least one of a central control screen, an armrest screen, a display screen of a smart watch, and a display screen of a learning machine.

[0022] An automatic test system for a display screen provided by the present utility model has the following technical effects:

[0023] 1. The data communication unit is adopted to realize data communication between the host computer and the main control module. The host computer sends corresponding instructions to the main control module, and the main control module sends the parameter information collected by the acquisition units such as the current acquisition module, the level detection module, and the brightness acquisition module, the serial port print information received by the serial interface, and the message information received by the CANFD transceiver unit to the host computer according to the instructions. Furthermore, various automatic test functions such as current detection, brightness detection, high and low level detection, message detection, and serial port detection are realized through the host computer, making the test functions more abundant. And compared with the conventional manual test, the test efficiency and test accuracy of the display screen test are improved.

[0024] 2. There are multiple current acquisition modules, level detection modules, CANFD transceiver units, brightness acquisition modules, device interfaces, and serial interfaces to form multiple test channels, which can support the individual test of one display screen or the synchronous test of multiple display screens. Description of the Drawings

[0025] Figure 1 is the schematic diagram of the principle when the automatic test system for a display screen provided by the present utility model tests the display screen;

[0026] Figure 2 is the structural schematic diagram of the automatic test system for a display screen provided by the present utility model when testing multiple display screens;

[0027] Figure 3 is the schematic diagram of the test flow of an automatic test system for a display screen;

[0028] Figure 4 is the circuit schematic diagram of the data communication unit;

[0029] Figure 5 is the circuit schematic diagram of the CANFD transceiver;

[0030] Figure 6 is the circuit schematic diagram of the level detection module;

[0031] Figure 7 is the circuit schematic diagram of the current acquisition module;

[0032] Figure 8 is the circuit schematic diagram of the switch unit;

[0033] Figure 9 is the circuit schematic diagram of the power supply module.

[0034] The reference signs are as follows:

[0035] 1. Data communication unit, 2. Main control module, 3. CANFD transceiver unit, 4. Current acquisition module, 5. Level detection module, 6. Brightness acquisition module, 7. Device interface, 8. Serial interface, 9. Power supply module, 10. Display screen, 11. Host computer, 12. Input power supply, 13. First interface, 14. Second interface, 15. Batt interface, 16. IGN interface, 17. First relay unit, 18. Second relay unit, 19. Drive module, 20. Photosensitive interface, 21. Ambient light sensor, 22. Data transmission module, 23. Communication interface, 24. CANFD transceiver, 25. CANFD interface, 26. DIP switch, 27. Power port, 28. GPIO pin, 29. Switch unit. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the protection scope of the present invention.

[0037] Embodiment 1

[0038] In this embodiment, as Figure 1 shown, an automatic test system for a display screen disclosed by the present invention includes a data communication unit 1, a main control module 2, a CANFD transceiver unit 3, a current acquisition module 4, a level detection module 5, a brightness acquisition module 6, a device interface 7, a serial interface 8, and a power supply module 9.

[0039] The data communication unit 1, the CANFD transceiver unit 3, the current acquisition module 4, the level detection module 5, the brightness acquisition module 6, the device interface 7, the serial interface 8, and the power supply module 9 are respectively electrically connected to the main control module 2. The data communication unit 1 is connected to the host computer 11, and the current acquisition module 4, the level detection module 5, the device interface 7, and the power supply module 9 are respectively electrically connected to the input power supply 12.

[0040] As Figure 1 , 2 shown, the CANFD transceiver unit 3, the current acquisition module 4, the level detection module 5, the brightness acquisition module 6, the device interface 7, and the serial interface 8 are each provided with at least two, and in this embodiment, three are respectively set, which are group A, group B, and group C in sequence. The display screen 10 is at least one of a central control screen, an armrest screen, a display screen of a smart watch, and a display screen of a learning machine.

[0041] The data communication unit 1 is used for communication connection between the host computer 11 and the main control module 2. As Figure 1 ,Figure 2 , Figure 4 As shown in Figure 4 , the data communication unit 1 is an Ethernet communication unit. The Ethernet communication unit includes a connected data transmission module 22 and a communication interface 23. The data transmission module 22 is electrically connected to the main control module 2, and the communication interface 23 is connected to the host computer 11.

[0042] In this embodiment, the data transmission module 22 uses an Ethernet Phy chip, and the communication interface 23 is an RJ45 interface, which can support 100M Ethernet (TCP / IP protocol) bidirectional communication.

[0043] The CANFD transceiver unit 3 is used to receive the message information of the display screen 10 and send it to the main control module 2.

[0044] As Figure 1 , Figure 2 , Figure 5 shown, in this embodiment, the CANFD transceiver unit 3 includes a connected CANFD transceiver 24 and a CANFD interface 25. The CANFD transceiver 24 is electrically connected to the main control module 2, and the CANFD interface 25 is electrically connected to the CANFD transceiver port of the display screen 10, so that the automatic test system can adapt to the signal transmission requirements of different display screens 10.

[0045] As Figure 1 , Figure 7 shown, the current acquisition module 4 is used to detect the sampling resistors (the first resistor R2 and the second resistor R3) respectively to acquire the working current information of the display screen 10 and send it to the main control module 2.

[0046] As Figure 1 , Figure 6 shown, the level detection module 5 is used to detect the high and low level status information of the output port (i.e., the GPIO port) of the main control module 2 and send it to the main control module 2 to ensure that the hardware interface of the main control module 2 can work normally.

[0047] As Figure 2 shown, the brightness acquisition module 6 is arranged on the display screen 10 to be tested, and is used to acquire the brightness information of the display screen 10 and send it to the main control module 2. The brightness acquisition module 6 includes a photosensitive interface 20 electrically connected to the main control module 2, and an ambient light sensor 21 externally connected to the photosensitive interface 20 and arranged on the display screen 10.

[0048] As Figure 1 , Figure 2 and Figure 8As shown, the CANFD transceiver unit 3, the device interface 7, and the serial interface 8 are respectively electrically connected to the display screen 10 to be tested. The automatic test system further includes a driving module 19 and a switching unit 29; the driving module 19 is respectively electrically connected to the main control module 2 and the switching unit 29, and the switching unit 29 is respectively electrically connected to the input power supply 12 and the device interface 7.

[0049] The device interface 7 includes a Batt interface 15 and an IGN interface 16, and the switching unit 29 includes a first relay unit 17 and a second relay unit 18 that are respectively electrically connected to the driving module 19; the Batt interface 15 is electrically connected to one end of the first relay unit 17, and the IGN interface 16 is electrically connected to one end of the second relay unit 18. The input power supply 12 is respectively electrically connected to the other ends of the first relay unit 17 (i.e., the first relay J1 and the second relay J2) and the second relay unit 18 (i.e., the third relay J3 and the fourth relay J4). In this embodiment, the Batt interface 15 is electrically connected to the power supply port 27 of the display screen 10 to supply power to the display screen 10 through the automatic test system, and the IGN interface 16 is electrically connected to the GPIO pin 28 of the display screen 10 to wake up the display screen 10 and prevent it from entering the sleep state.

[0050] The serial interface 8 is electrically connected to the serial port module on the display screen 10 to receive the corresponding serial port print information of the display screen 10 and send it to the main control module 2. The serial port baud rate of the automatic test system can be set through the host computer 11 to be compatible with the test requirements of display screens 10 in different fields.

[0051] As Figure 1 、 Figure 9 shown, the power supply module 9 is used to supply power to the internal modules of the automatic test system, and the input power supply 12 supplies power to multiple display screens 10 to be tested, making the power supply safer and more reliable. At the same time, the package volume of the power supply module 9 can be reduced. The input end of the power supply module 9 is provided with a first protection unit R1, and the first protection unit R1 is electrically connected to the input power supply 12 through the first interface 13. Among them, the first protection unit R1 is a fuse.

[0052] The automatic test system further includes sampling resistors (i.e., the first resistor R2 and the second resistor R3) and a second protection unit (i.e., the third resistor R4 and the fourth resistor R5). The sampling resistors (the first resistor R2 and the second resistor R3) are connected in series with the second protection unit (the third resistor R4 and the fourth resistor R5). The current acquisition module 4 is connected to the sampling resistors (the first resistor R2 and the second resistor R3). The first end of the sampling resistors (the first resistor R2 and the second resistor R3) is electrically connected to the device interface 7 through the switch unit 29, and the second end of the second protection unit (the third resistor R4 and the fourth resistor R5) is respectively electrically connected to the input power supply 12 through the second interface 14. Among them, the second protection unit (the third resistor R4 and the fourth resistor R5) is a fuse. The first interface 13 and the second interface 14 are DC sockets, and the input power supply 12 uses a switching power supply.

[0053] The main control module 2, implemented by an MCU, is used to control the information acquisition of the display screen 10 and the main control module 2 according to the instructions sent by the host computer 11, and send the acquired information to the host computer 11. The acquired information includes message information, serial port print information, working current information, high and low level status information, and brightness information.

[0054] The host computer 11 is used to send instructions to the main control module 2, and is also used to compare the acquired information with the corresponding preset information to obtain a test result. The host computer 11 can also generate a test report according to the test result for subsequent users to view.

[0055] The automatic test system further includes a DIP switch 26, which is used as a reserved module for customizing functions.

[0056] An automatic test system for a display screen provided by the present utility model realizes automatic testing by the host computer 11 in an Ethernet communication mode, and the main control module 2 respectively sends the acquired working current information, high and low level status information, brightness information, message information, and serial port print information to the host computer 11, so as to cover the test requirements of multiple dimensions such as current, optics, and communication connection at the same time; and the embedded GPIO test can be carried out by verifying the high and low level status information of the output port of the main control module 2. The system can also control multiple display screens 10 at the same time or test a single display screen 10 alone, with low requirements for the test level of testers and simplified test steps.

[0057] As Figure 3 shown, in this embodiment, the test process of the automatic test system is described with two test channels, and the test process is as follows:

[0058] 1. Hardware initialization of the main control module 2

[0059] Before receiving the instruction sent by the host computer 11, the main control module 2 defaults to performing initialization operations first, specifically including clock system initialization, GPIO port initialization, timer initialization, CANFD initialization, serial port initialization, and FreeRTOS initialization. Among them, after receiving the instruction, the MCU can change the configuration information of the CANFD interface 25 and the serial interface 8 according to the instruction content.

[0060] 2. Ethernet Initialization

[0061] 3. Sending Instructions

[0062] Specifically, the host computer 11 communicates and connects with the main control module 2 through the data communication unit 1 according to the preset communication protocol, and the tester sends instructions to the main control module 2 through the host computer 11.

[0063] 4. The host computer 11 detects whether it has received a response

[0064] The host computer 11 detects whether it has received a response sent by the main control module 2 (that is, receives data information such as the working current information, high and low level status information, brightness information, message information, and serial port print information sent by the MCU). If the host computer 11 detects that it has received a response, it returns to continue detection after executing the corresponding instruction. If it detects that it has not received a response, it returns to continue detection.

[0065] The instructions include channel selection instructions and detection instructions. The channels include test channel one and test channel two. Each test channel is respectively connected to a display screen 10 to be tested. The number of test channels can be set as needed. Each test channel receives each detection instruction respectively. Each detection instruction includes a detection current instruction, a detection brightness instruction, a detection message instruction, a detection serial port instruction, and a detection high and low level instruction.

[0066] 5. Executing Instructions

[0067] When the host computer 11 detects the current, the host computer 11 reads the working current information of the display screen 10 sent by the main control module 2 according to the sent detection current instruction, and compares it with the preset working current to judge whether the current working current of the display screen 10 is normal.

[0068] When the host computer 11 detects the brightness, the host computer 11 reads the brightness information of the display screen 10 sent by the main control module 2 according to the sent detection brightness instruction, and compares it with the preset brightness to judge whether the current brightness of the display screen 10 meets the requirements.

[0069] When the host computer 11 detects a message, the host computer 11 initializes the CANFD interface 25 according to the sent message detection instruction, and then traverses the message information uploaded by all CANFD transceivers 24, compares the message information with the set message data, checks whether the message data exists, and ensures the security of communication.

[0070] When the host computer 11 detects the serial port, the host computer 11 initializes the serial interface 8 according to the sent serial port detection instruction, and traverses the serial port print information of all serial interfaces 8, compares the serial port print information with the keywords set in the host computer 11, checks whether the corresponding serial port exists, and ensures the accuracy of vehicle data transmission.

[0071] When the host computer 11 detects high and low levels, the host computer 11 reads the level status information of the output port of the main control module 2 according to the sent high and low level detection instruction, and compares it with the set level to judge whether the port connection of the main control module 2 meets the set requirements.

[0072] The present utility model is not limited to the above best implementation manner. Any person can obtain other various forms of products under the inspiration of the present utility model. However, no matter what changes are made in its shape or structure, as long as it has a technical solution identical or similar to the present application, it falls within the protection scope of the present utility model.

Claims

1. An automatic test system for a display screen, characterized in that: It includes a data communication unit (1), a main control module (2), a CANFD transceiver unit (3), a current acquisition module (4), a level detection module (5), a brightness acquisition module (6), a device interface (7), a serial interface (8), and a power supply module (9); The data communication unit (1), the CANFD transceiver unit (3), the current acquisition module (4), the level detection module (5), the brightness acquisition module (6), the device interface (7), the serial interface (8), and the power supply module (9) are respectively electrically connected to the main control module (2). The data communication unit (1) is connected to the host computer (11). The current acquisition module (4), the level detection module (5), the device interface (7), and the power supply module (9) are respectively electrically connected to the input power supply (12). The CANFD transceiver unit (3), the device interface (7), and the serial interface (8) are respectively electrically connected to the display screen (10) to be tested. The brightness acquisition module (6) is arranged on the display screen (10); The current acquisition module (4) is used to acquire the working current information of the display screen (10) and send it to the main control module (2); the level detection module (5) is used to detect the high and low level status information of the output port of the main control module (2) and send it to the main control module (2); the brightness acquisition module (6) is used to acquire the brightness information of the display screen (10) and send it to the main control module (2); The CANFD transceiver unit (3) is used to receive the message information of the display screen (10) and send it to the main control module (2); The serial interface (8) is used to receive the corresponding serial port print information of the display screen (10) and send it to the main control module (2); The main control module (2) is used to control the information acquisition of the display screen (10) and the main control module (2) according to the instructions sent by the host computer (11), and send the acquired information to the host computer (11). The acquired information includes message information, serial port print information, working current information, high and low level status information, and brightness information; The host computer (11) is used to send instructions to the main control module (2), and is also used to compare the received acquired information with the corresponding preset information to obtain the test result; The data communication unit (1) is used to establish a communication connection between the host computer (11) and the main control module (2).

2. The automatic test system for a display screen according to claim 1, characterized in that: The automatic test system further includes a driving module (19) and a switch unit (29); the driving module (19) is respectively electrically connected to the main control module (2) and the switch unit (29), and the switch unit (29) is respectively electrically connected to the input power supply (12) and the device interface (7).

3. The automatic test system for a display screen according to claim 2, wherein: The device interface (7) includes a Batt interface (15) and an IGN interface (16) respectively electrically connected to the display screen (10). The switch unit (29) includes a first relay unit (17) and a second relay unit (18) respectively electrically connected to the driving module (19); The Batt interface (15) is electrically connected to one end of the first relay unit (17), the IGN interface (16) is electrically connected to one end of the second relay unit (18), and the input power supply (12) is electrically connected to the other end of the first relay unit (17) and the other end of the second relay unit (18) respectively.

4. The automatic test system for a display screen according to claim 1, wherein: The brightness acquisition module (6) includes a photosensitive interface (20) electrically connected to the main control module (2), and an ambient light sensor (21) is externally connected to the photosensitive interface (20).

5. The automatic test system for a display screen according to claim 1, wherein: There are at least two of the CANFD transceiver unit (3), the current acquisition module (4), the level detection module (5), the brightness acquisition module (6), the device interface (7), and the serial interface (8) respectively.

6. The automatic test system for a display screen according to claim 1, characterized in that: The data communication unit (1) is an Ethernet communication unit.

7. The automatic test system for a display screen according to claim 6, characterized in that: The Ethernet communication unit includes a data transmission module (22) and a communication interface (23) connected to each other. The data transmission module (22) is electrically connected to the main control module (2), and the communication interface (23) is connected to the upper computer (11).

8. The automatic test system for a display screen according to claim 1, characterized in that: The display screen (10) is at least one of a central control screen, an armrest screen, a display screen of a smart watch, and a display screen of a learning machine.

Images