A lamp panel automatic detection system and method

Abstract

The application discloses a kind of lamp panel automatic detection system and system, the system includes: lamp panel, testing device, the lamp panel includes circuit board, terminal module and connector are arranged on the circuit board, the terminal module includes several groups of terminal pair, each group of terminal pair includes one working terminal and one auxiliary terminal;The testing device includes adjustable power supply and programmable controller, the power supply output end of the adjustable power supply is connected with the external connection point, and the programmable controller controls the adjustable power supply to the external connection point and carries out power-on test.The application uses the external connection point on auxiliary circuit as the detection point of lamp panel, avoids detecting lamp panel through connector, so that lamp panel can meet the demand of multiple test functions.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of circuit board, in particular to a lamp panel automatic detection system and method. BACKGROUND

[0002] The lamp panel is a commonly used electronic module. Generally, the lamp panel needs to be connected with other functional modules through a connecting structure such as a wire, and the connecting structure such as the wire is generally connected to the lamp panel through a connector. After the lamp panel is produced, it needs to be detected. The conventional method is to connect the connector of the lamp panel with the wire, and simulate the external functional module to control the lamp panel to detect the specific situation of the lamp panel. It is found in actual operation that since a lamp panel needs to be detected multiple times before it is shipped, the connector is prone to loosening after being plugged and unplugged multiple times, which reduces the service life of the connector and is not conducive to the long-term use of the lamp panel product. Moreover, the existing test scheme is single and cannot quickly detect the quality of components, the quality of component and pad welding, the quality of lamp panel design circuit, and the quality of connector PIN pin welding, etc., and cannot be adjusted to meet the changing needs of test functions. SUMMARY

[0003] The present application provides a lamp panel and a lamp panel detection and diagnosis method. By arranging an auxiliary circuit on the lamp panel, the external connection point on the auxiliary circuit is used as a detection point of the lamp panel, avoiding detection of the lamp panel through the connector, so that the lamp panel can meet the needs of various test functions.

[0004] Correspondingly, the present application provides a lamp panel automatic detection system, which comprises a lamp panel and a test device, wherein:

[0005] The lamp panel comprises a circuit board, and the circuit board is arranged with a terminal module and a connector. The terminal module comprises a plurality of terminal pairs, each terminal pair comprising a working terminal and an auxiliary terminal. The working terminal is in communication with a working positive electrode or a working negative electrode of a working circuit, and the auxiliary terminal is in communication with one end of an auxiliary circuit. The other end of the auxiliary circuit is an external connection point. The working circuit is provided with a component, and the component comprises at least one lamp bead. The working terminal and the auxiliary terminal are connected based on the connector.

[0006] The test device comprises an adjustable power supply and a programmable controller. The power output end of the adjustable power supply is connected to the external connection point. The adjustable power supply is used to power on the external connection point, and the programmable controller controls the adjustable power supply to test the power on of the external connection point.

[0007] The circuit board comprises a substrate, a copper foil layer and an insulating layer, the substrate is provided with a groove corresponding to the position of the external connection point, the copper foil layer covers the substrate, the insulating layer covers the copper foil layer, and a hollow structure is formed in the groove, which exposes the copper foil layer to the external connection point.

[0008] The test device further comprises a test frame provided with probes matched with the external connection points, a plurality of power output lines are arranged on the test frame, each of the plurality of power output lines is connected with a probe, and the plurality of power output lines are connected with the power output end of the adjustable power supply.

[0009] A relay is arranged on the power output end of the adjustable power supply and each of the plurality of power output lines, and the signal end of the relay is connected with the programmable controller.

[0010] The programmable controller is provided with a plurality of test cases, each of the plurality of test cases corresponds to a lamp panel test function, and the lamp panel test function corresponds to the preset number of energized external connection points.

[0011] The test cases comprise a PIN pin soldering test, a working line conduction test, a small current test, a graphic patterning test and a large current test.

[0012] Correspondingly, the embodiment of the application further provides a lamp panel detection method for the lamp panel automatic detection system, and the lamp panel detection method comprises the following steps.

[0013] The programmable controller acquires a test case to be detected, the test case corresponds to a lamp panel test function, and the lamp panel test function corresponds to the preset number of energized external connection points.

[0014] The programmable controller analyzes the external connection points required to be energized based on the test case.

[0015] The programmable controller controls the adjustable power supply to power on the external connection points required to be energized.

[0016] The running state of the working line is identified to test and diagnose the lamp panel.

[0017] The programmable controller controls the adjustable power supply to power on the external connection points required to be energized, which comprises the following steps.

[0018] The programmable controller generates a corresponding relay control signal according to the external connection points required to be energized.

[0019] The programmable controller sends the corresponding relay control signal to the corresponding relay on the power output end of the adjustable power supply.

[0020] The corresponding relay on the power output end of the adjustable power supply controls the adjustable power supply to power on the external connection point according to the corresponding relay control signal.

[0021] The programmable controller controls the adjustable power supply to power on the required power-on external connection point, and further comprises:

[0022] The programmable controller analyzes the required power-on detection current size in the test case;

[0023] The programmable controller controls the adjustable power supply to match the required power-on detection current value for the required power-on external connection point according to the required power-on detection current size.

[0024] The method further comprises:

[0025] Setting a test item to be detected, the test item containing at least one test case.

[0026] The setting of the test item to be detected comprises:

[0027] According to the test order, a plurality of test cases are set in the test item to be detected.

[0028] The programmable controller acquires the test case to be detected, and comprises:

[0029] According to the test case set in the test item to be detected, the test case to be detected is acquired one by one.

[0030] In summary, the lamp panel automatic detection system and method provided by the present application, due to the design of the terminal module, the insulation of the working terminal and the auxiliary terminal of the terminal pair can represent the connection of the connector after welding, and the design of the auxiliary circuit and the external connection point can make the detection of the lamp panel more convenient, avoiding the use of the connector and affecting the service life of the connector. Correspondingly, the lamp panel detection and diagnosis method provided by the embodiment of the present application starts from the connectivity of the terminal module and the connector, and through the use of the auxiliary circuit, it can detect and diagnose several kinds of bad conditions that may exist in the lamp panel, and has good detection convenience and practicability. The whole system uses the external connection point on the auxiliary circuit as the detection point of the lamp panel, avoids directly detecting the lamp panel through the connector, and makes the lamp panel meet the needs of various test functions. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to make the technical solutions of the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only need to be some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0032] Figure 1 The three-dimensional structure schematic diagram of the lamp plate of the embodiment of the present application.

[0033] Figure 2 The terminal module structure schematic diagram of the embodiment of the present application.

[0034] Figure 3 The circuit principle schematic diagram of the working module of the embodiment of the present application.

[0035] Figure 4 The auxiliary module structure schematic diagram of the embodiment of the present application.

[0036] Figure 5 The external connection point structure partial sectional view of the embodiment of the present application.

[0037] Figure 6 The lamp plate circuit structure schematic diagram of the embodiment of the present application.

[0038] Figure 7 The first structure schematic diagram of the connector bottom surface of the embodiment of the present application.

[0039] Figure 8 The first bonding structure schematic diagram of the embodiment of the present application.

[0040] Figure 9 The second structure schematic diagram of the connector bottom surface of the embodiment of the present application.

[0041] Figure 10 The second bonding structure schematic diagram of the embodiment of the present application.

[0042] Figure 11 The lamp plate automatic detection system structure schematic diagram of the embodiment of the present application.

[0043] Figure 12 The probe and external connection point matching structure schematic diagram of the embodiment of the present application.

[0044] Figure 13 The method flow chart of the lamp plate detection in the embodiment of the present application. DETAILED DESCRIPTION

[0045] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0046] Figure 1 The three-dimensional structure schematic diagram of the lamp plate in the embodiment of the present application is shown, wherein the model structures of the working module 2, the auxiliary module 4 and the terminal module 5 are only used for respectively representing the setting positions of the working module 2, the auxiliary module 4 and the terminal module 5 on the circuit board 1, and do not represent the actual implementation structures. The actual implementation structures of the working module 2, the auxiliary module 4 and the terminal module 5 will be further introduced subsequently.

[0047] Correspondingly, the lamp plate in the embodiment of the present application comprises the circuit board 1, and the working module 2, the connector 3, the auxiliary module 4 and the terminal module 5 are arranged on the circuit board 1. Herein, the connector 3 is bonded on the terminal module 5.

[0048] Specifically, the lamp plate in the embodiment of the present application is built by taking the circuit board 1 as a carrier, and a plurality of modules with different functions are arranged on the circuit board 1. The types of the modules include the working module 2, the auxiliary module 4 and the terminal module 5. The terminal module 5 refers to a structure arranged on the circuit board 1 and used for bonding the connector 3. The working module 2 refers to a structure with a light-emitting function on the lamp plate. The auxiliary module 4 refers to a structure with an additional function. It should be noted that the accompanying drawings Figure 1 are only used for showing the structure schematic diagram of one kind of application structure of the lamp plate. According to the different setting positions of the modules on the circuit board, the lamp plate has a plurality of implementation manners. For example, the circuit board 1 can be provided with the modules on both sides. According to the different setting surfaces of the modules on the circuit board, the circuit board has a plurality of implementation manners. The embodiment of the present application is only taken as an example for description.

[0049] Specifically, in the embodiment of the present application, the working module 2 is arranged on the front surface of the circuit board 1. The working module 2 comprises a plurality of components. The components are arranged on the front surface of the circuit board 1.

[0050] The terminal module 5 and the auxiliary module 4 are arranged on the back surface of the circuit board 1.

[0051] Figure 2A terminal module 5 structure schematic diagram of an embodiment of the present application is shown, the terminal module 5 includes several groups of terminal units 500, each group of terminal units 500 has two mutually insulated bonding terminals, each group of terminal units includes a working terminal 501 and an auxiliary terminal 502, that is, the working terminal 501 and the auxiliary terminal 502 are mutually insulated bonding terminals.

[0052] The terminal module 5 has an even number of bonding terminals, specifically, the working terminal 501 and the auxiliary terminal 502 are bonding terminals with different functions, wherein the working terminal 501 is used to connect with the working module 2, and the auxiliary terminal 502 is used to connect with the auxiliary module 4; in fact, the working terminal 501 and the auxiliary terminal 502 do not mean that the working terminal 501 and the auxiliary terminal 502 have different actual structures, in the design stage, any two bonding terminals can be classified as a group of terminal units 500 according to the needs, and consistency can be maintained in subsequent use.

[0053] Commonly, the structure of the terminal module 5 mainly includes two forms of double-row structure and single-row structure, the double-row structure means that the bonding terminals in the terminal module 5 are arranged in two rows, and the single-row structure means that the bonding terminals in the terminal module 5 are arranged in one row, according to different embodiments, the structure of the terminal module 5 changes accordingly. In the embodiment of the present application, referring to the drawings Figure 2 Schematic, the bonding terminals are configured as two rows, and generally, since the working lines on the working module 2 are located on one side of the bonding terminals, and the auxiliary lines on the auxiliary module 4 are located on the other side of the bonding terminals, based on the convenience of wiring, the working terminal 501 and the auxiliary terminal 502 are arranged on the two rows of bonding terminals respectively (that is, all the working terminals 501 are located in one row, and all the auxiliary terminals 502 are located in one row); wherein the working terminal 501 and the auxiliary terminal 502 in the same group of terminal groups can be corresponding or not corresponding in the up-down direction of the illustration, therefore, in order to accurately define the two bonding terminals corresponding in the up-down direction of the illustration, the following definitions are made in the embodiment of the present application:

[0054] The line board 1 is provided with a third coordinate axis and a fourth coordinate axis which are orthogonally arranged on one side of the terminal group;

[0055] All the bonding terminals are divided into several groups of terminal pairs 503 according to a predetermined mode, each terminal pair 503 includes a working terminal 501 and an auxiliary terminal 502;

[0056] All the terminal pairs 503 are arranged along the direction of the third coordinate axis;

[0057] In each group of terminal pairs 503, the two bonding terminals are arranged along the direction of the fourth coordinate axis.

[0058] By the above definition, the positionally corresponding working terminal 501 and auxiliary terminal 502 are shown as a terminal pair 503 for the convenience of description.

[0059] Further, in the optional embodiment, in each terminal pair 503, the lengths of the two bonding terminals in the direction of the fourth coordinate axis are different, specifically, in any two adjacent terminal pairs 503, the lengths of the two bonding terminals in the direction of the fourth coordinate axis are different, and / or the lengths of the two bonding terminals 503 in the direction of the fourth coordinate axis are different, which can reduce the probability of occurrence of tin connection and other adverse phenomena caused by the flow of solder 700.

[0060] Figure 3 The circuit principle diagram of the working module 2 of the embodiment of the application is shown, which includes a plurality of working units, each working unit has a working positive electrode and a working negative electrode and a working line connection between the working positive electrode and the working negative electrode, the plurality of working units include a plurality of components, the plurality of components are working units formed according to the requirements of the lamp panel, and at least one of the components is a light emitting device, the light emitting device is arranged on the front surface of the line circuit board 1, the line circuit board 1 is provided with a working unit, the working unit includes a working positive electrode 202 and a working negative electrode 203, the working positive electrode 202 is connected with a working terminal 501 of a corresponding terminal pair, and the working negative electrode 203 is connected with a working terminal 501 of another corresponding terminal pair.

[0061] Specifically, in many application occasions, the light emitting device is an LED, and in addition to the light emitting device, related components 201 such as resistors, ICs, etc. for assisting the light emitting device to work need to be arranged in the working line.

[0062] In the embodiment of the application, the working positive electrode and the working negative electrode of each working line are connected to the corresponding working terminal 501 of the terminal module 5 through the line on the circuit board, and the working line is a non-closed loop on the line circuit board 1, and needs to pass through an external structure to make the working line closed and work normally.

[0063] Further, the auxiliary module 4 has the functions of testing the bonding of the auxiliary test connector 3 and the terminal module 5, testing the conduction of the working line, testing the working condition of the components 201 in the working line, and serving as a backup circuit, and on this basis, in order to accurately and directionally test the components 201, the line circuit board 1 of the embodiment of the application further includes at least one test module, which is described with reference to Figure 3As shown in the structure, each test module includes a first test line 910 having a first test end and a second test end 902, and a second test line 920 having a third test end and a fourth test end 904; each test module is arranged in correspondence with a component, the first test end and the third test end are respectively connected to two poles of the component, the second test end 902 and the fourth test end 904 are respectively open-circuit external connection points 401 arranged on the front or back of the circuit board 1.

[0064] Figure 4 An auxiliary module 4 structure schematic diagram of an embodiment of the application is shown, the auxiliary module 4 includes several auxiliary units, the auxiliary unit has a first connection end, a second connection end and an auxiliary line 402 between the first connection end and the second connection end, the first connection end is connected with an auxiliary terminal 502 of a corresponding terminal pair, and the second connection end is an open-circuit external connection point 401. Specifically, the external connection point 401 realizes circuit communication with the auxiliary terminal 502 through the auxiliary line 402.

[0065] In an optional embodiment, the circuit board 1 is provided with a first coordinate axis and a second coordinate axis arranged orthogonally on one side of the external connection point 401, each external connection point 401 has a first coordinate corresponding to the first coordinate axis and a second coordinate corresponding to the second coordinate axis; the first coordinates of all external connection points 401 are different from each other, and the second coordinates of any two adjacent external connection points 401 are different. Through this arrangement, when the external connection point 401 is used externally, the probe and other structures have a relatively generous operating space, thereby reducing the difficulty of use. In an optional embodiment, the difference between the second coordinates of any two adjacent external connection points 401 is greater than or equal to 0.2 mm. In actual application, the arrangement of the external connection point 401 on the circuit board 1 is not limited to the above manner, as long as the first coordinates and the second coordinates of any two external connection points 401 are different, and the distance difference between any two external connection points is greater than or equal to 0.2 mm.

[0066] Further, with reference to Figure 5 An external connection point 401 structure partial cross-sectional view of an embodiment of the application is shown, Figure 5 The structure shown is a partial display of the area of the circuit board 1 provided with the external connection point 401. In actual use, in order to avoid exposure of the circuit, a layer of insulating layer 801 is generally required to be covered on the surface of the circuit board 1, and in order to ensure the use of the external connection point 401, the insulating layer 801 needs to be removed in the corresponding area. With reference to the drawings Figure 5As shown in the structure, the auxiliary unit is arranged on the substrate 803 of the circuit board 1, in order to protect the relevant electrical circuit (in the embodiment of the application, the layer in which the electrical circuit is arranged is defined as a copper foil layer), it is necessary to cover the insulating layer 801 on all the electrical circuits (such as the auxiliary circuit 402 in the schematic diagram), in addition, since the external connecting point 401 needs to be used, it is necessary to remove the insulating layer 801 at the external connecting point 401. Further, the external connecting point 401 is generally used for the use of a probe and the like, in order to reduce the use difficulty, in the embodiment of the application, a recess is arranged on the substrate 803 at a position corresponding to the external connecting point 401; the copper foil layer is covered on the substrate 803, and the structure formed by the copper foil layer at the position corresponding to the external connecting point 401 is consistent with the recess structure; the insulating layer 801 is covered on the copper foil layer, and a hollow structure is formed in the recess, which exposes the copper foil layer on the recess structure to form the external connecting point 401, when the external connecting point 401 is used, the structure of a thimble, a probe and the like can be clamped in the corresponding recess structure, and the actual detection operation is more convenient.

[0067] Figure 6 The schematic diagram of the lamp plate circuit structure of the embodiment of the application is shown, and the schematic diagram of the lamp plate circuit structure of the embodiment of the application is shown in combination with the foregoing descriptions of the working module 2, the auxiliary module 4 and the terminal module 5. Figure 6 As shown in the structure, wherein the ellipsis represents hidden working circuit structures. In the embodiment of the application, the working module 2 and the auxiliary module 4 are respectively connected with the terminal module 5, wherein the terminal module 5 has a special design structure to realize the required function.

[0068] Specifically, for the working module 2, the working positive electrode 202 and the working negative electrode 203 of the working circuit are respectively connected with a corresponding working terminal 501, in the lamp plate circuit, the working circuit is a non-loop structure, and needs to rely on an additional structure to realize the closed-loop work.

[0069] In actual use, a terminal seat needs to be welded on the terminal module 5 to facilitate use, the bottom surface of the terminal seat is welded on the terminal module 5, and the solder pad on the bottom surface of the terminal seat is connected with the terminal in the terminal module 5 through the solder 700. Specifically, in the embodiment of the application, the structure of the terminal seat is as follows:

[0070] The connector 3 has a plurality of pad units 600 at the bottom, each of which is connected with a corresponding auxiliary terminal 502 and a corresponding working terminal 501; specifically, in the embodiment of the present application, each of the pad units 600 has one or two bonding pads 601; when the pad unit 600 has two bonding pads 601, the two bonding pads 601 are connected with a corresponding set of terminal pairs 503 when the connector 3 is bonded on the circuit board 1.

[0071] It should be noted that in the embodiment of the present application, each of the pad units 600 is connected with a corresponding auxiliary terminal 502 and a corresponding working terminal 501, that is, one auxiliary terminal 502 and one working terminal 501 are connected based on a corresponding pad unit 600, and since the specific structure of the pad unit 600 is various, the implementation mode of the connection of the auxiliary terminal 502 and the working terminal 501 based on the pad unit 600 is also various.

[0072] Figure 7 The first structure of the bottom surface of the terminal seat is shown, and in order to reflect the corresponding relationship between the pad unit 600 and the terminal pair 503, the structure of the terminal module 5 is shown below the first structure of the bottom surface of the terminal seat.

[0073] Directly, the welding of the connector 3 on the terminal module 5 is realized by the solder 700, and the solder 700 itself has conductivity, so in actual implementation, the solder 700 itself can be used to complete the connection between the auxiliary terminal 502 and the working terminal 501, that is, the solder 700 used when the connector 3 is welded on the terminal module 5 can directly connect the auxiliary terminal 502 and the working terminal 501 that need to be connected. In actual implementation, since the solder 700 is attached to the surface of the auxiliary terminal 502 and the working terminal 501, correspondingly, in order to connect the auxiliary terminal 502 and the working terminal 501 that need to be connected, the shape structure of the bonding pad 601 in the pad unit 600 needs to correspond to the auxiliary terminal 502 and the working terminal 501.

[0074] Referring to the drawings Figure 8 The first bonding structure is shown, the terminal pair 503 and the corresponding pad unit 600 are connected based on the solder 700, and the auxiliary terminal 502 and the working terminal 501 in the terminal pair 503 are connected by the solder 700 itself or by the bonding pad 601 in the pad unit 600.

[0075] Figure 9The terminal seat bottom surface second structure schematic diagram of the embodiment of the present application is shown, in order to embody the corresponding relationship of the pad unit 600 and the terminal pair 503, the structure schematic diagram of the terminal module 5 is shown below the terminal seat bottom surface second structure, in the embodiment of the present application, each pad unit 600 includes two bonding pads 601, the structure of the two bonding pads 601 on the terminal seat bottom surface is separated, but in the interior of the terminal seat, the two bonding pads 601 are connected with each other, thus, in actual use, the two bonding pads 601 are respectively connected with the working terminal 501 and the auxiliary terminal 502 in the terminal pair 503, and the working terminal 501 and the auxiliary terminal 502 are connected through the line in the interior of the terminal seat.

[0076] Referring to the drawings Figure 10 The second bonding structure schematic diagram is shown, the working terminal 501 and the auxiliary terminal 502 in the terminal pair 503 are respectively connected with the two bonding pads 601 of the corresponding pad unit 600 based on the solder 700, the two bonding pads 601 have a connection relationship in the terminal seat, and correspondingly, the working terminal 501 and the auxiliary terminal 502 are connected through the corresponding pad unit 600.

[0077] In actual use, since the connector 3 needs to be bonded on the terminal module 5 through the solder 700, on the one hand, bonding defects may occur in the bonding process, thus it is necessary to detect the bonding of the connector 3 on the circuit board 1, on the other hand, since the working circuit and the component 201 on the circuit board 1 also have a certain probability of defects, it is also necessary to detect the working circuit and the component 201, in order to conveniently and reliably realize the detection function, the embodiment of the present application adopts the implementation means of adding an auxiliary module 4, and the structure of the terminal module 5 and the working module 2 is correspondingly improved, specifically, each terminal unit 500 in the terminal module 5 has two bonding terminals, and is classified into a terminal pair 503 based on the spatial position, the two bonding terminals (a working terminal 501 and an auxiliary terminal 502) in the terminal unit 500 are respectively used for connecting one end of the working circuit and one end of the auxiliary circuit 402, the two ends of the working circuit are respectively connected with the two bonding terminals (the working terminal 501), when the connector 3 is bonded on the terminal module 5 through the solder 700, the working terminal 501 and the auxiliary terminal 502 in the terminal pair 503 need to be connected synchronously, the connection between the working terminal 501 and the auxiliary terminal 502 in the terminal pair 503 is substantially the connection between one end of the working circuit and the first connecting end of the corresponding auxiliary circuit 402, after the connector 3 is bonded on the terminal module 5, the external connecting point 401 of the auxiliary circuit 402 and the corresponding working terminal 501 are in an equipotential relationship in the ideal state, correspondingly, the related test on the external connecting point 401 can diagnose the fault problems of the lamp board, for example, the connector 3 fails to be correctly bonded on the terminal module 5, the circuit of the working circuit has a problem, the component 201 in the working circuit does not work, etc.; the related test on the external connecting point 401 mainly includes the following: for a specific working circuit, the two ends of the working circuit are respectively connected with two working terminals 501, correspondingly, the two working terminals 501 respectively have corresponding auxiliary terminals 502 (the corresponding relationship in the terminal pair 503), the two auxiliary terminals 502 respectively have corresponding auxiliary circuits 402 and corresponding external connecting points 401, after the connector 3 is bonded on the terminal module 5, the two external connecting points 401 are contacted by a probe or other equipment, the connection between the auxiliary terminal 502 and the working terminal 501 (reflecting the bonding of the connector 3 on the terminal module 5), the normal situation of the working circuit loop, the normal operation of the component 201, etc. can be detected; further, if the working circuit has a fault, the auxiliary circuit 402 can also be used for repairing the lamp board, thereby improving the repairability of the lamp board.

[0078] Figure 11 The structure of the lamp board in the embodiment of the present application is shown in the structure schematic diagram of the lamp board automatic detection system, the system comprises a lamp board and a test device, the structure of the lamp board isFigures 1 to 10 The structure and description shown here will not be repeated.

[0079] The test device includes an adjustable power supply and a programmable controller, the power output end of the adjustable power supply is connected to the external connection point, the adjustable power supply is used to power on the external connection point, and the programmable controller controls the adjustable power supply to power on the external connection point for testing.

[0080] Because the external connection point is exposed through the hollow structure formed by the insulating layer, the external connection point and the power output end of the adjustable power supply are easily paired and connected, ensuring the detection reliability of the detection point.

[0081] It should be noted that the test device includes a test frame, the test frame is provided with a probe matched with the external connection point, the test frame is provided with a plurality of power output lines, each power output line in the plurality of power output lines is connected to a probe, and the plurality of power output lines are connected to the power output end of the adjustable power supply.

[0082] Each power output line is connected to a probe, each probe is connected to an external connection point, and the current control input of the external connection point is completed through the probe, so that it can complete the test function of the lamp panel according to the test case, thereby realizing fine testing.

[0083] It should be noted that a relay is arranged on the power output end of the adjustable power supply and each power output line in the plurality of power output lines, and the signal end of the relay is connected to the programmable controller. The relay here receives the control signal sent by the programmable controller, which can make the relay complete the switching action, and the switching action makes the power on each power output line can complete the current control input of the external connection point in combination with the test application scene.

[0084] It should be noted that the programmable controller is provided with a plurality of test cases, each test case in the plurality of test cases corresponds to a lamp panel test function, and the lamp panel test function corresponds to the preset number of power supply of the external connection point. These test cases include: PIN pin tin test, working line conduction test, small current test, patterned test, large current test, etc.

[0085] Based on Figure 11The system is shown, according to the inherent characteristics of the mini LED light emitting device itself and the PCB lamp panel circuit design of its application, the minimum current (according to the LED positive and negative voltage, current), the large current (according to the LED junction temperature and the LED pin temperature), the multi-anode integration (according to the circuit design characteristics) and other means and methods, design PLC programmable control program.

[0086] When the minimum current or the maximum current calculated by the adjustable power supply input, a signal is input to the PLC controller, the current and the voltage are output to the relay circuit, the PLC program is started, according to the test method, the control signal is sent, the relay receives the signal, and then the on or off is performed. The probe accesses the power supply, the probe contacts the corresponding test point, and the lamp panel is turned on. That is, the circuit forms a closed loop, and the test can be performed.

[0087] It should be noted that the program of the PLC control is designed according to the test means and method of the mini LED light emitting device and circuit; the current and voltage of the adjustable power supply are also adjusted according to the test means and method of the mini LED light emitting device and circuit.

[0088] Specifically, Figure 12 The matching structure diagram of the probe and the external connection point in the embodiment of the application is shown, a plurality of probes are arranged on the test frame 131, the plurality of probes include the positive probe 133 and the negative probe 132, and the positive probe 133 and the negative probe 132 can be connected with the corresponding external connection point 401 for testing.

[0089] Figure 13 The method flow chart of the lamp panel detection in the embodiment of the application is shown, including the following steps:

[0090] S131, the programmable controller acquires a test case to be detected;

[0091] It should be noted that the test case corresponds to the lamp panel test function, and the lamp panel test function corresponds to the power-on number of the preset external connection point.

[0092] S132, the programmable controller analyzes the required power-on external connection point based on the test case;

[0093] S133, the programmable controller controls the adjustable power supply to power on the required power-on external connection point;

[0094] It should be noted that the programmable controller controls the adjustable power supply to power on the required power connection point includes: the programmable controller generates the corresponding relay control signal according to the required power connection point; the programmable controller sends the corresponding relay control signal to the corresponding relay on the power output end of the adjustable power supply; the corresponding relay on the power output end of the adjustable power supply controls the adjustable power supply to power on the external connection point according to the corresponding relay control signal.

[0095] It should be noted that the programmable controller controls the adjustable power supply to power on the required power connection point also includes: the programmable controller analyzes the detection current size required for power-on in the test case; the programmable controller controls the adjustable power supply to match the detection current value required for power-on for the required power-on external connection point according to the detection current size required for power-on.

[0096] S134, identify the running situation of the working circuit to test and diagnose the lamp panel.

[0097] In the process of the embodiment of the application, the test project to be detected can be set, and the test project includes at least one test case. Here, setting the test project to be detected includes: setting multiple test cases in the test project to be detected according to a test sequence. Here, the programmable controller acquires the test case to be detected includes: acquiring the test case to be detected one by one according to the test case set in the test project to be detected.

[0098] Based on the method in the embodiment of the application, the welding quality and appearance of the PIN feet of the connector can be detected, and the following is a PIN feet tin connection test:

[0099] 1. According to the line design, the connector PIN feet have four types of electrical function PIN feet, namely odd positive, even positive, odd negative and even negative. According to the test case, all positive (odd positive and even positive) and part of the negative (odd negative or even negative) are connected: such as alternate row lighting, to determine whether the negative PIN feet are connected to tin and whether the corresponding line and device are conductive; if adjacent PIN feet are abnormal or connected to tin, all devices will be fully lit.

[0100] 2. Connect odd positive (or even positive) and all negative (odd negative and even negative): then alternate row lighting, to determine whether the positive PIN feet are connected to tin and whether the corresponding line and device are conductive; if adjacent PIN feet are abnormal or connected to tin, all devices will be fully lit.

[0101] Through the above test cases, the PIN feet tin connection and current conduction can be tested.

[0102] Since each test point is independent, the connection between each test point can be designed in any combination, in series or in parallel, in series first and then in parallel, or in parallel first and then in series, etc. for working line conduction test. The arbitrary combination design can perform functional test on certain special requirements or performance of the product, such as running horse type function, pattern type function, character type function, etc.

[0103] Small current test: according to the volt-ampere characteristic table of the light emitting device, the circuit current is designed according to the photoelectric parameter table, and n positive terminals correspond to m negative terminals, that is, the total number of lamp areas = n*m;

[0104] Then the total current I(total) = K*IR(max)*n*m;

[0105] 0 < K ≤ 4.3 and single light emitting device current ≤ IF*0.5%, to ensure that the light emitting device can be slightly bright.

[0106] Through the small current conduction of the light emitting device, it is detected whether the light emitting device has leakage, internal chip structure difference and other defects and damage.

[0107] Large current test: single light emitting device design current*1.1 to 1.5, which needs to ensure that the pin temperature of the light emitting device is 45-75℃.

[0108] Here K represents the coefficient, IR represents the reverse current, I(total) is the total current of the circuit; IF is the forward current of the single light emitting device.

[0109] Through the large current conduction of the light emitting device, the welding quality of the P IN pin of the connector and the terminal module, and the welding quality between the light emitting device and the circuit board are detected.

[0110] Here, based on the structure of the lamp plate, it can realize some branch test, or partial branch test, that is, multiple branch test, and the lighting area corresponding to multiple branches can be:

[0111] (1) A specific display area;

[0112] (2) Multiple scattered display areas;

[0113] According to the requirements, (1) can be customized according to the application end requirements, for example, when the display opens and displays a specific LOGO, a large current is passed through the LOGO display area to achieve the display effect, and during the lamp plate test, a large current can also be passed through the LOGO display area to check the display effect.

[0114] Here, the test cases to be detected can be acquired one by one according to the test cases set in the test item to be detected, and the test order can be to perform the PIN pin soldering test first, then the small current test, and finally the large current test, and the like. The PIN pin soldering test includes whether there is soldering between the PIN pins, such as setting the line-by-line lighting or column-by-column lighting for testing; and the welding quality of the PIN pins, which is tested by full lighting. The small current test is tested by full lighting, which can control the adjustable power supply to turn on the light emitting device according to the preset small current. The large current test can be tested by full lighting or regional lighting, which can be completed by the adjustable power supply according to the preset large current. It should be noted that the plurality of test cases are set in the test item to be detected according to the test order, which can be set according to the test environment or test requirement, and is not limited to the above test order and test content.

[0115] The lamp panel automatic detection system and method provided in the embodiments of the present application can represent the welding condition of the connector through the insulation of the working terminal and the auxiliary terminal of the terminal module after the working terminal and the auxiliary terminal are connected, and the detection of the lamp panel is more convenient through the design of the auxiliary circuit and the external connection point, and the service life of the connector is not affected. The lamp panel detection and diagnosis method provided in the embodiments of the present application can detect and diagnose several kinds of bad conditions in the lamp panel through the use of the auxiliary circuit, and has good detection convenience and practicability. The system uses the external connection point on the auxiliary circuit as the detection point of the lamp panel, avoids directly detecting the lamp panel through the connector, and makes the lamp panel meet the requirements of various test functions.

[0116] The lamp panel and the lamp panel detection and diagnosis method provided in the embodiments of the present application are described in detail, and the principles and implementation manners of the present application are described by using specific examples. The above description of the embodiments is only used to help understand the method and the core idea of the present application; meanwhile, the specific implementation manners and application ranges can be changed according to the idea of the present application by the person skilled in the art. Therefore, the content of the description should not be understood as the limitation of the present application.

Claims

1. A lamp panel automatic detection system, characterized in that, The system comprises a lamp panel and a testing device, wherein: The lamp panel comprises a circuit board, a terminal module and a connector, the terminal module comprises a plurality of terminal pairs, each terminal pair comprises a working terminal and an auxiliary terminal, the working terminal is connected with a working positive pole or a working negative pole of a working circuit, the auxiliary terminal is connected with one end of an auxiliary circuit, the other end of the auxiliary circuit is an external connection point, the working circuit is provided with components, the components comprise at least one lamp bead, and the working terminal and the auxiliary terminal are connected based on the connector; The testing device comprises an adjustable power supply and a programmable controller, the power output end of the adjustable power supply is connected with the external connection point, the adjustable power supply is used for powering on the external connection point, and the programmable controller controls the adjustable power supply to power on the external connection point for testing.

2. The lamp panel automatic detection system of claim 1, wherein, The circuit board comprises a base material, a copper foil layer and an insulating layer, the base material is provided with a groove at a position corresponding to the external connection point, and the copper foil layer covers the base material; the insulating layer covers the copper foil layer, and a hollow structure is formed in the groove, so that the copper foil layer on the groove structure is exposed to form the external connection point.

3. The lamp panel automatic detection system of claim 1, wherein, The testing device further comprises a testing rack, the testing rack is provided with a probe matched with the external connection point, and the testing rack is provided with a plurality of power output lines, each power output line is connected with a probe, and the plurality of power output lines are connected with the power output end of the adjustable power supply.

4. The lamp panel automatic detection system of claim 3, wherein, A relay is arranged on the power output end of the adjustable power supply and each power output line, and the signal end of the relay is connected with the programmable controller.

5. The lamp panel automatic detection system of claim 2, wherein, The programmable controller is provided with a plurality of test cases, each test case corresponds to a lamp panel test function, and the lamp panel test function corresponds to a preset number of powered external connection points.

6. The lamp panel automatic detection system of claim 5, wherein, The test cases comprise a PIN pin soldering test, a working circuit conduction test, a small current test, a patterned test and a large current test.

7. A method of light panel detection, characterized in that, The lamp panel detection method for the lamp panel automatic detection system of any one of claims 1 to 6 comprises the following steps: The programmable controller acquires a test case to be detected, the test case corresponds to a lamp panel test function, and the lamp panel test function corresponds to a preset number of powered external connection points; The programmable controller analyzes the required powered external connection points based on the test case; The programmable controller controls the adjustable power supply to power on the required powered external connection points; The working circuit is tested and diagnosed by identifying the running condition of the working circuit.

8. The method of lamp panel detection of claim 7, wherein, The programmable controller controls the adjustable power supply to power on the required powered external connection points, which comprises the following steps: The programmable controller generates a corresponding relay control signal according to the required powered external connection points; The programmable controller sends the corresponding relay control signal to the corresponding relay on the power output of the adjustable power supply; The corresponding relay on the power output of the adjustable power supply controls the adjustable power supply to power on the external connection point according to the corresponding relay control signal.

9. The method of lamp panel detection of claim 8, wherein, The programmable controller controls the adjustable power supply to power on the required external connection point also includes: The programmable controller analyzes the required detection current size in the test case; The programmable controller controls the adjustable power supply to match the required detection current value for the required external connection point according to the required detection current size.

10. A method of lamp panel detection as claimed in any one of claims 7 to 9, characterized in that, The method also includes: Setting a test item to be detected, which contains at least one test case.

11. The method of lamp panel detection of claim 10, wherein, The setting of the test item to be detected includes: According to the test order, a plurality of test cases are set in the test item to be detected.

12. The method of lamp panel detection of claim 11, wherein, The programmable controller acquires the test case to be detected includes: According to the test case set in the test item to be detected, the test case to be detected is acquired one by one.

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