Lighting test circuit board structure and lighting test device

Abstract

The utility model provides a lighting test circuit board structure and a lighting test device, the lighting test circuit board structure comprises a first connector, a first electric connecting piece, a second electric connecting piece, a second connector, a third electric connecting piece and a circuit board, the first connector is provided with two first plugging ends; the first end of the first electric connecting piece is connected with one first plugging end, and the first end of the second electric connecting piece is connected with the other first plugging end; the second connector is used for being connected with the first connector in an inserted mode. The second connector is provided with two second plugging ends, and the two second plugging ends and the two first plugging ends are arranged in a one-to-one correspondence manner; two ends of the third electric connecting piece are respectively connected with the two second plugging ends; the circuit board is provided with a control circuit which is electrically connected with the second end of the first electric connecting piece and the second end of the second electric connecting piece. The first reminding signal can be generated in time, and the situation that the display device is damaged due to the fact that the first connector and the second connector are not correspondingly connected when inserted is avoided.

Description

Technical Field

[0001] This application relates to the field of display device testing technology, and in particular to a lamp-lighting test circuit board structure and a lamp-lighting test device. Background Technology

[0002] In order to improve the yield rate of display devices during production, a backlight testing device is used to test the backlight module of the display device.

[0003] In related technologies, see Figure 1 The lighting test device 1000 includes a drive module 1200, a first connector 1110 electrically connected to the drive module, and a second connector 1120 electrically connected to the display device 2000. The first connector 1110 has multiple output terminals (not shown in the figure), and the second connector 1120 has multiple input terminals (not shown in the figure). The first connector 1110 is connected to the second connector 1120.

[0004] Before testing, the first connector 1110 and the second connector 1210 need to be plugged in to connect multiple output terminals to multiple input terminals, so as to realize the electrical connection between the driver module 1200 and the display device 2000. Then, the driver module 1200 is connected to the external power supply 3000. After the display device 2000 is powered on, the lamp test is performed.

[0005] During use, the first connector 1110 and the second connector 1120 of the lamp testing device 1000 are prone to misalignment, incorrect insertion, or incomplete connection. Specifically, multiple output terminals of the first connector 1110 may not be properly connected to multiple input terminals of the second connector 1120. If this situation is not detected in time, connecting the driver module 1200 to an external power supply will damage the display device 2000. Utility Model Content

[0006] This application provides a circuit board structure and a lighting test device for lighting tests, which can prevent damage to the display device caused by mismatch between the first connector and the second connector during the lighting test.

[0007] In a first aspect, this application provides a lamp-lighting test circuit board structure, applied to a lamp-lighting test device for testing display devices, the lamp-lighting test device including a driving module for connecting to an external power supply; the lamp-lighting test circuit board structure includes:

[0008] A first connector is used for electrical connection with the drive module; the first connector has two first plug-in terminals.

[0009] A first electrical connector and a second electrical connector, wherein a first end of the first electrical connector is connected to one of the first plug terminals, and a first end of the second electrical connector is connected to the other of the first plug terminals;

[0010] The second connector is used for electrical connection with the display device and for insertion into the first connector; the second connector has two second insertion ends, which are arranged one-to-one with the two first insertion ends;

[0011] A third electrical connector, the two ends of which are respectively connected to the two second plug-in terminals; and

[0012] The circuit board is provided with a control circuit electrically connected to the second end of the first electrical connector and the second end of the second electrical connector. When at least one of the first electrical connector and the second electrical connector is disconnected from the third electrical connector, the control circuit is used to generate a first reminder signal.

[0013] The solution provided in this application has a first electrical connector and a second electrical connector respectively led out from the two first plug ends of the first connector, and a third electrical connector connected to the two second plug ends of the second connector. A control circuit electrically connected to the first electrical connector and the second electrical connector is provided on the circuit board. When at least one of the first electrical connector and the second electrical connector is disconnected from the third electrical connector, the control circuit can promptly issue a reminder signal, thereby promptly reminding the test personnel to discover and eliminate situations such as the first connector and the second connector being inserted in reverse or not properly connected. This ensures that during the lamp-lighting test of the display device, the display device is not damaged due to the mismatch between the first connector and the second connector.

[0014] In conjunction with the first aspect, in some possible implementations, the control circuit includes:

[0015] Power supply module; and

[0016] The reminder module is connected to the power supply module, the second end of the first electrical connector, and the second end of the second electrical connector.

[0017] When at least one of the first electrical connector and the second electrical connector is disconnected from the third electrical connector, the power supply module outputs current to the reminder module so that the reminder module generates the first reminder signal.

[0018] In combination with the first aspect and the above implementation methods, in some possible implementations, the reminder module includes:

[0019] A current limiting unit, wherein the first end of the current limiting unit is connected to one end of the power supply module;

[0020] A first switching unit, wherein the controlled terminal of the first switching unit is connected to the second terminal of the current limiting unit and the second terminal of the second electrical connector, the first terminal of the first switching unit is connected to the third terminal of the current limiting unit, and the second terminal of the first switching unit is connected to the second terminal of the first electrical connector and the other terminal of the power supply module and grounded; and

[0021] The first reminder unit has a first end connected to the fourth end of the current limiting unit, and a second end connected to the first end of the first switch unit and the third end of the current limiting unit.

[0022] When at least one of the first electrical connector and the second electrical connector is disconnected from the third electrical connector, the first switch unit is turned on, and the power supply module outputs current to the first reminder unit through the current limiting unit, so that the first reminder unit generates the first reminder signal.

[0023] In combination with the first aspect and the above implementation methods, in some possible implementations, the current limiting unit includes:

[0024] A first resistor, one end of which is connected to one end of the power supply module, and the other end of which is connected to the controlled end of the first switching unit and the second end of the second electrical connector;

[0025] A second resistor, one end of which is connected to one end of the first resistor and one end of the power supply module, and the other end of which is connected to a first end of the first switch unit and a second end of the first reminder unit; and

[0026] The third resistor has one end connected to one end of the second resistor, one end of the first resistor, and one end of the power supply module, and the other end of the third resistor is connected to the first end of the first reminder unit.

[0027] In combination with the first aspect and the above implementation methods, in some possible implementations, the reminder module further includes:

[0028] The second reminder unit has a first end connected to the second end of the current limiting unit, and a second end connected to the controlled end of the first switch unit and the second end of the second electrical connector.

[0029] When the third electrical connector is connected to the first electrical connector and the second electrical connector, the power supply module outputs current to the second reminder unit through the current limiting unit, so that the second reminder unit generates a second reminder signal, which is different from the first reminder signal.

[0030] In combination with the first aspect and the above-described implementation, in some possible implementations, the control circuit further includes:

[0031] The control module has a first terminal connected to the first terminal of the current limiting unit, a second terminal connected to the second terminal of the first reminder unit, a third terminal connected to the input terminal of the drive module, and a fourth terminal connected to the external power supply.

[0032] When the third electrical connector is connected to the first electrical connector and the second electrical connector, the power supply module outputs current to the control module through the current limiting unit, and the third terminal and the fourth terminal of the control module are connected, so that the driving module supplies power to the display device.

[0033] In combination with the first aspect and the above implementation methods, in some possible implementations, the control module includes:

[0034] The fourth resistor, the first end of which is connected to the first end of the current limiting unit;

[0035] The second switching unit has its controlled terminal connected to the second terminal of the first reminder unit, the first terminal of the first switching unit, and the third terminal of the current limiting unit. The first terminal of the second switching unit is connected to the second terminal of the fourth resistor. The second terminal of the second switching unit is connected to the second terminal of the first switching unit, the second terminal of the first electrical connector, and the other terminal of the power supply module, and is grounded.

[0036] The third switching unit has a first end connected to the first end of the fourth resistor and one end of the power supply module, a second end connected to the second end of the fourth resistor and the first end of the second switching unit, a third end connected to the input end of the drive module, and a fourth end connected to the external power supply.

[0037] In combination with the first aspect and the above implementation methods, in some possible implementation methods, the third switching unit is a relay, the relay includes a coil and a contact group; the first end of the coil is connected to the first end of the fourth resistor, the second end of the coil is connected to the second end of the fourth resistor and the first end of the second switching unit, the first contact of the contact group is connected to the input terminal of the drive module, and the second contact of the contact group is connected to the external power supply.

[0038] When the third electrical connector is connected to the first electrical connector and the second electrical connector, the first switch unit is disconnected, the second switch unit is connected, the power supply module outputs current to the coil through the fourth resistor, and the first contact and the second contact are connected, so that the drive module supplies power to the display device.

[0039] In combination with the first aspect and the above implementation methods, in some possible implementations, the first connector includes:

[0040] The male connector includes two first plug terminals and multiple third plug terminals; and

[0041] The first connecting harness is connected to the plurality of the third plug terminals and is electrically connected to the drive module;

[0042] The second connector includes:

[0043] The female connector includes two second plug terminals and multiple fourth plug terminals; and

[0044] The second connecting harness is connected to a plurality of fourth plug terminals and is electrically connected to the display device;

[0045] The male connector can be plugged into the female connector. When the two first plug terminals are connected to the two second plug terminals, the multiple third plug terminals are connected to the multiple fourth plug terminals, and the first connecting wire harness and the second connecting wire harness form an electrical connection.

[0046] Secondly, this application also provides a lamp testing device, comprising:

[0047] Driver module; and

[0048] The lighting test circuit board structure described in any of the first aspects above.

[0049] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0050] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the embodiments described below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0051] Figure 1 This is a schematic diagram of the structure of a lamp testing device in related technologies;

[0052] Figure 2 This is a schematic diagram of the structure of the first type of lamp testing device provided in the embodiments of this application;

[0053] Figure 3 This is a schematic diagram of the structure of the second type of lamp testing device provided in the embodiments of this application;

[0054] Figure 4 This is a schematic diagram of the structure of the third type of lamp testing device provided in the embodiments of this application;

[0055] Figure 5 This is a schematic diagram of the structure of the fourth type of lamp testing device provided in the embodiments of this application.

[0056] The annotations in the attached figures are explained as follows:

[0057] 100—Lighting test device;

[0058] 110—Light-up test circuit board structure;

[0059] 111—First connector;

[0060] 112—First electrical connector; 113—Second electrical connector;

[0061] 114—Second connector;

[0062] 115—Third electrical connection;

[0063] 116—Circuit board;

[0064] 117—Control circuit;

[0065] E—Power supply module;

[0066] 1171—Reminder Module;

[0067] R—Current limiting unit; R1—First resistor; R2—Second resistor; R3—Third resistor;

[0068] NM1—First switch unit; LED1—First reminder unit; LED2—Second reminder unit;

[0069] 1172—Control Module;

[0070] R4—the fourth resistor;

[0071] NM2—Second switching unit;

[0072] K—Third switching unit;

[0073] 120—Driver Module;

[0074] 200—Display devices;

[0075] 300—External power supply. Detailed Implementation

[0076] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0077] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0078] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0079] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0080] In related technologies, see Figure 1The lighting test device 1000 includes a drive module 1200, a first connector 1110 electrically connected to the drive module, and a second connector 1120 electrically connected to the display device 2000. The first connector 1110 has multiple output terminals (not shown in the figure), and the second connector 1120 has multiple input terminals (not shown in the figure). The first connector 1110 is connected to the second connector 1120.

[0081] Before testing, the first connector 1110 and the second connector 1210 need to be plugged in to connect multiple output terminals to multiple input terminals, so as to realize the electrical connection between the driver module 1200 and the display device 2000. Then, the driver module 1200 is connected to the external power supply 3000. After the display device 2000 is powered on, the lamp test is performed.

[0082] During use, the first connector 1110 and the second connector 1120 of the lamp testing device 1000 are prone to misalignment, incorrect insertion, or incomplete connection. Specifically, multiple output terminals of the first connector 1110 may not be properly connected to multiple input terminals of the second connector 1120. If this situation is not detected in time, connecting the driver module 1200 to an external power supply will damage the display device 2000.

[0083] To address the aforementioned technical problems, this application provides a lighting test circuit board structure and a lighting test device. The lighting test circuit board structure and lighting test device provided in this application will be described in detail below with reference to the accompanying drawings.

[0084] Please refer to Figures 2 to 5 The lighting test device 100 proposed in this application is used to perform lighting tests on the backlight module of the display device 200. The lighting test device 100 includes a driver module 120 and a lighting test circuit board structure 110.

[0085] The driver module 120 is used to connect to an external power supply 300; the external power supply 300 is typically AC power supplied by the mains, such as household electricity at 110V, 220V, or 230V, or commercial or industrial electricity at 380V or higher voltage levels. The driver module 120, connected to the external power supply 300, converts the AC power supplied by the external power supply 300 into DC power suitable for use by the display device 200.

[0086] The lighting test circuit board structure 110 includes a first connector 111, a first electrical connector 112, a second electrical connector 113, a second connector 114, a third electrical connector 115, and a circuit board 116. The first connector 111 is electrically connected to the drive module 120; the first connector 111 has two first plug-in terminals. The first end of the first electrical connector 112 is connected to one of the first plug-in terminals, and the first end of the second electrical connector 113 is connected to the other first plug-in terminal. The second connector 114 is electrically connected to the display device 200 and plugs into the first connector 111; the second connector 114 has two second plug-in terminals, each corresponding to one of the two first plug-in terminals. The two ends of the third electrical connector 115 are respectively connected to the two second plug-in terminals. The circuit board 116 is provided with a control circuit 117 electrically connected to the second end of the first electrical connector 112 and the second end of the second electrical connector 113. When at least one of the first electrical connector 112 and the second electrical connector 113 is disconnected from the third electrical connector 115, the control circuit 117 is used to generate a first reminder signal.

[0087] It should be noted that the first connector 111 may include a male connector and a first connecting wire harness. The male connector includes two first plug terminals and multiple third plug terminals. The first connecting wire harness is connected to the multiple third plug terminals and is electrically connected to the drive module 120. The first connector 111 is used to establish electrical connections between circuits to realize the transmission of current and / or signals. There are many types and models of first connectors 111, and designers can select a suitable first connector 111 according to actual needs. This application does not make any specific limitations in this regard.

[0088] The first electrical connector 112 and the second electrical connector 113 can be wires or other metal or non-metal connectors capable of electrical connection. The first end of the first electrical connector 112 is connected to one first plug-in end of the first connector 111, and the first end of the second electrical connector 113 is connected to the other first plug-in end of the first connector 111. That is, two wires can be led out from the two first plug-in ends of the first connector 111, that is, the first electrical connector 112 and the second electrical connector 113 can be led out respectively.

[0089] Similar to the first connector 111, the second connector 114 may include a female connector and a second connecting harness. The female connector includes two second plug terminals and a plurality of fourth plug terminals. The second connecting harness is connected to the plurality of fourth plug terminals and is electrically connected to the display device 200.

[0090] The third electrical connector 115 is similar to the first electrical connector 112 and the second electrical connector 113, and can also be a wire or other metal or non-metal connector capable of electrical connection. Both ends of the third electrical connector 115 are connected to the two second plug terminals respectively. That is, a wire can be connected to both ends of the third electrical connector 115, i.e., a third electrical connector 115 can be connected to both ends of the third electrical connector 115.

[0091] The second connector 114 is inserted into the first connector 111, and the two second insertion ends of the second connector 114 are respectively configured to correspond one-to-one with the two first insertion ends of the first connector 111. When the second connector 114 is inserted into the first connector 111, the male connector can be inserted into the female connector.

[0092] If the two first plug terminals of the male connector are connected to the two second plug terminals of the female connector, and the third electrical connector 115 is connected to the first electrical connector 112 and the second electrical connector 113, then the multiple third plug terminals are connected to the multiple fourth plug terminals, and the first connecting harness and the second connecting harness form an electrical connection. In other words, the drive module 120 is connected to the display device 200 in sequence through the first connecting harness and multiple third plug terminals of the first connector 111, and the multiple fourth plug terminals and the second connecting harness of the second connector 114.

[0093] If the two first connectors of the male connector and the two second connectors of the female connector are not connected accordingly (e.g., reversed, misaligned, or not properly connected), causing at least one of the first electrical connectors 112 and 113 to disconnect from the third electrical connector 115, then multiple third connector connections and multiple fourth connector connections will not be connected accordingly, and the first and second wiring harnesses will not form an electrical connection. In other words, the drive module 120 will be disconnected from the display device 200. At this time, the control circuit 117 can generate a first reminder signal. The first reminder signal can be sound, light, vibration, etc. Based on the first reminder signal, the tester can promptly detect and eliminate faults such as reversed, misaligned, or improperly connected first connectors 111 and 114.

[0094] The solution provided in this application has a first electrical connector 112 and a second electrical connector 113 respectively led out from the two first plug ends of the first connector 111, and a third electrical connector 115 connected to the two second plug ends of the second connector 114. A control circuit 117 electrically connected to the first electrical connector 112 and the second electrical connector 113 is provided on the circuit board 116. When at least one of the first electrical connector 112 and the second electrical connector 113 is disconnected from the third electrical connector 115, the control circuit 117 can promptly issue a reminder signal, thereby promptly reminding the test personnel to find and eliminate situations such as the first connector 111 and the second connector 114 being reversed, misaligned, or not properly plugged in, which are not corresponding connections. This ensures that during the lamp-lighting test of the display device 200, the display device 200 is not damaged due to the mismatch between the first connector 111 and the second connector 114.

[0095] The following combination Figures 3 to 5 The specific structure of the control circuit 117 will be described in detail.

[0096] See Figure 3 In some embodiments, the control circuit 117 includes a power supply module E and an alert module 1171. The alert module 1171 is connected to the power supply module E, the second end of the first electrical connector 112, and the second end of the second electrical connector 113. When at least one of the first electrical connector 112 and the second electrical connector 113 is disconnected from the third electrical connector 115, the power supply module E outputs current to the alert module 1171, causing the alert module 1171 to generate a first alert signal.

[0097] The power supply module E can be powered by the battery-driven reminder module 1171.

[0098] In this embodiment of the application, at least one of the first electrical connector 112 and the second electrical connector 113 is disconnected from the third electrical connector 115, which can change the on / off state of different branches in the reminder module 1171, thereby causing the power supply module E to output current to the reminder module 1171 so that the reminder module 1171 generates a first reminder signal.

[0099] In practical applications, the circuit structure of the reminder module 1171 can have various forms. Please continue reading... Figure 3In some embodiments, the reminder module 1171 may include a current limiting unit R, a first switching unit NM1, and a first reminder unit LED1. The first end of the current limiting unit R is connected to one end of the power supply module E. The controlled end of the first switching unit NM1 is connected to the second end of the current limiting unit R and the second end of the second electrical connector 113. The first end of the first switching unit NM1 is connected to the third end of the current limiting unit R. The second end of the first switching unit NM1 is connected to the second end of the first electrical connector 112 and the other end of the power supply module E, and is grounded. The first end of the first reminder unit LED1 is connected to the fourth end of the current limiting unit R, and the second end of the first reminder unit LED1 is connected to the first end of the first switching unit NM1 and the third end of the current limiting unit R. When at least one of the first electrical connector 112 and the second electrical connector 113 is disconnected from the third electrical connector 115, the first switching unit NM1 is turned on, and the power supply module E outputs current to the first reminder unit LED1 via the current limiting unit R, so that the first reminder unit LED1 generates a first reminder signal.

[0100] Because the first switching unit NM1 and the first reminder unit LED1 have maximum current limits, if the current exceeds the rated value, the first switching unit NM1 and the first reminder unit LED1 may be damaged or even burned out. Therefore, this embodiment of the application limits the current by setting a current limiting unit R, so that the first switching unit NM1 and the first reminder unit LED1 can operate within a safe current range.

[0101] The current limiting unit R can use one or more resistors to limit the current magnitude. For example, such as... Figure 3 As shown, the current limiting unit R may include a first resistor R1, a second resistor R2, and a third resistor R3. One end of the first resistor R1 is connected to one end of the power supply module E, and the other end of the first resistor R1 is connected to the controlled terminal of the first switching unit NM1 and the second end of the second electrical connector 113. One end of the second resistor R2 is connected to one end of the first resistor R1 and one end of the power supply module E, and the other end of the second resistor R2 is connected to the first terminal of the first switching unit NM1 and the second terminal of the first reminder unit LED1. One end of the third resistor R3 is connected to one end of the second resistor R2, one end of the first resistor R1, and one end of the power supply module E, and the other end of the third resistor R3 is connected to the first terminal of the first reminder unit LED1. The resistor used in the current limiting unit R is one of the most basic components in electronic circuits. The resistance value is easy to adjust, making it convenient for debugging and maintenance. Resistors also have advantages such as low price and easy availability. Of course, the current limiting unit R can also use other electronic components such as diodes to limit the current. Designers can design a suitable current limiting unit R according to actual needs, which will not be described in detail in this application.

[0102] The first switching unit NM1 is a three-terminal device whose on / off state is controlled by an external signal. The controlled terminal of the first switching unit NM1 is connected to the second terminal of the second electrical connector 113 and is connected to the power supply module E through the current limiting unit R. The first terminal of the first switching unit NM1 is connected to the second terminal of the first reminder unit LED1, and the second terminal of the first switching unit NM1 is grounded. When at least one of the first electrical connector 112 and the second electrical connector 113 is disconnected from the third electrical connector 115, the controlled terminal of the first switching unit NM1 can control the first and second terminals of the first switching unit NM1 to conduct. Since the first terminal of the first reminder unit LED1 is connected to the power supply module E through the current limiting unit R, the power supply module E can form a circuit with the first reminder unit LED1, and the first reminder unit LED1 generates a first reminder signal.

[0103] The first reminder unit LED1 can be at least one of a light-emitting diode, an electric horn, or an electric motor. The first switching unit NM1 can be a bipolar junction transistor (BJT), an N-type metal-oxide-semiconductor (NMOS) field-effect transistor, a P-type metal-oxide-semiconductor (PMOS) field-effect transistor, an insulated gate bipolar transistor (IGBT), etc. This application does not impose specific limitations on this.

[0104] To better understand the working principle of the reminder module 1171, the following explanation will be based on the following example: the power supply module E uses a battery, the first switching unit NM1 uses an NMOS transistor, the current limiting unit R uses a first resistor R1, a second resistor R2 and a third resistor R3, and the first reminder unit LED1 uses a light-emitting diode.

[0105] like Figure 3 As shown, one end of the first resistor R1 is connected to the positive terminal of the battery; one end of the second resistor R2 is connected to one end of the first resistor R1; one end of the third resistor R3 is connected to one end of the second resistor R2, and the other end of the third resistor R3 is connected to the positive terminal of the light-emitting diode; the drain of the NMOS transistor is connected to the other end of the second resistor R2 and the negative terminal of the light-emitting diode; the source of the NMOS transistor is connected to the second end of the first wire and the negative terminal of the battery and grounded; the gate of the NMOS transistor is connected to the other end of the first resistor R1 and the second end of the second wire.

[0106] When at least one of the first electrical connector 112 and the second electrical connector 113 is disconnected from the third electrical connector 115, the branch containing the first resistor R1 is disconnected, the gate of the NMOS transistor is at a high level, the drain and source of the NMOS transistor are connected, the branch containing the second resistor R2 is connected, the negative terminal of the light-emitting diode is grounded, and the positive terminal of the light-emitting diode is connected to the positive terminal of the battery through the third resistor R3. Therefore, the light-emitting diode can form a circuit with the battery and emit light normally.

[0107] As can be seen from the above embodiments, when the first reminder unit LED1 generates the first reminder signal, the tester can determine that the first connector 111 and the second connector 114 are not properly connected; when the first reminder unit LED1 does not generate the first reminder signal, the tester can determine that the first connector 111 and the second connector 114 are properly connected. However, if the first reminder unit LED1 malfunctions and cannot work normally, the first reminder signal will not be generated regardless of whether the first connector 111 and the second connector 114 are properly connected. If the first reminder unit LED1 fails to generate the first reminder signal due to a malfunction when the first connector 111 and the second connector 114 are not properly connected, and the tester believes that the first connector 111 and the second connector 114 are properly connected and connects the drive module 120 to the external power supply 300, then the display device 200 may be damaged.

[0108] Based on this, see Figure 4 In some embodiments, the reminder module 1171 may further include a second reminder unit LED2. The first end of the second reminder unit LED2 is connected to the second end of the current limiting unit R, and the second end of the second reminder unit LED2 is connected to the controlled end of the first switching unit NM1 and the second end of the second electrical connector 113. When the third electrical connector 115 is connected to the first electrical connector 112 and the second electrical connector 113, the power supply module E outputs current to the second reminder unit LED2 via the current limiting unit R, causing the second reminder unit LED2 to generate a second reminder signal, which is different from the first reminder signal.

[0109] It is understandable that the second reminder unit LED2 can also be at least one of a light-emitting diode, an electric horn, or an electric motor. It is also understandable that when the second reminder unit LED2 and the first reminder unit LED1 use the same device, the second signal generated by the second reminder unit LED2 will be different from the first reminder signal generated by the first reminder unit LED1. For example, when both the second reminder unit LED2 and the first reminder unit LED1 use light-emitting diodes, the second reminder signal generated by the second reminder unit LED2 can be green, while the first reminder signal generated by the first reminder unit LED1 can be red.

[0110] The following explanation uses a battery for the power supply module E and a light-emitting diode for the second reminder unit LED2 as an example.

[0111] like Figure 3 As shown, one end of the first resistor R1 is connected to the positive terminal of the battery; the other end of the first resistor R1 is connected to the positive terminal of the light-emitting diode, and the negative terminal of the light-emitting diode is connected to the second end of the second electrical connector 113.

[0112] When at least one of the first electrical connector 112 and the second electrical connector 113 is disconnected from the third electrical connector 115, the negative terminal of the LED is grounded, and the positive terminal of the LED is connected to the positive terminal of the battery through the first resistor R1. Therefore, the LED can form a circuit with the battery and emit light normally.

[0113] By setting a second reminder unit LED2 in this embodiment, testers can be promptly informed that the first connector 111 and the second connector 114 are properly connected. Furthermore, when the first reminder unit LED1 malfunctions and cannot function properly, it can prevent misjudgment of the connection status between the first connector 111 and the second connector 114, thus effectively improving the reliability of the reminder module 1171.

[0114] To automatically connect the drive module 120 to the external power supply 300 when the first connector 111 and the second connector 114 are properly connected, in some embodiments, the control circuit 117 further includes a control module 1172. The first terminal of the control module 1172 is connected to the first terminal of the current limiting unit R, the second terminal of the control module 1172 is connected to the second terminal of the first reminder unit LED1, the third terminal of the control module 1172 is connected to the input terminal of the drive module 120, and the fourth terminal of the control module 1172 is connected to the external power supply 300. Specifically, when the third electrical connector 115 is connected to the first electrical connector 112 and the second electrical connector 113, the power supply module E outputs current to the control module 1172 via the current limiting unit R, and the third and fourth terminals of the control module 1172 are connected, allowing the drive module 120 to supply power to the display device 200.

[0115] In this embodiment, the third electrical connector 115 is connected to the first electrical connector 112 and the second electrical connector 113, which can change the on / off state of different branches in the alteration reminder module 1171 and the control module 1172, thereby causing the power supply module E to output current to the control module 1172. The control module 1172 automatically turns on the drive module 120 and the external power supply 300, thereby realizing the automatic power supply from the drive module 120 to the display device 200.

[0116] In practical applications, the circuit structure of the control module 1172 can have various forms. See [link / reference] Figure 5In some embodiments, the control module 1172 includes a fourth resistor R4, a second switching unit NM2, and a third switching unit K. The first end of the fourth resistor R4 is connected to the first end of the current limiting unit R. The controlled end of the second switching unit NM2 is connected to the second end of the first reminder unit LED1, the first end of the first switching unit NM1, and the third end of the current limiting unit R. The first end of the second switching unit NM2 is connected to the second end of the fourth resistor R4. The second end of the second switching unit NM2 is connected to the second end of the first switching unit NM1, the second end of the first electrical connector 112, and the other end of the power supply module E, and is grounded. The first end of the third switching unit K is connected to the first end of the fourth resistor R4. The second end of the third switching unit K is connected to the second end of the fourth resistor R4 and the first end of the second switching unit NM2. The third end of the third switching unit K is connected to the input end of the drive module 120, and the fourth end of the third switching unit K is connected to the external power supply 300.

[0117] The second switching unit NM2 can also be a bipolar junction transistor (BJT), an N-metal oxide semiconductor (NMOS) field-effect transistor, a P-metal oxide semiconductor (PMOS) field-effect transistor, an insulated gate bipolar transistor (IGBT), etc. The third switching unit K can be a relay or other controlled devices or circuits capable of switching on and off; this application does not impose specific limitations on this.

[0118] The second switching unit NM2 is a three-terminal device whose on / off state is controlled by an external signal. The controlled terminal of the second switching unit NM2 is connected to the first terminal of the first switching unit NM1, and is connected to the power supply module E through the current limiting unit R. The first terminal of the second switching unit NM2 is connected to the power supply module E through the fourth resistor R4, and the second terminal of the second switching unit NM2 is grounded.

[0119] The third switch unit K is a four-terminal device whose on / off state is controlled by an external signal. The first terminal of the third switch unit K is connected to the first terminal of the fourth resistor R4 and one terminal of the power supply module E. The second terminal of the third switch unit K is connected to the second terminal of the fourth resistor R4 and the first terminal of the second switch unit NM2. The third terminal of the third switch unit K is connected to the input terminal of the drive module 120. The fourth terminal of the third switch unit K is connected to the external power supply 300.

[0120] When the third electrical connector 115 is connected to the first electrical connector 112 and the second electrical connector 113, the controlled terminal of the first switching unit NM1 can control the first and second terminals of the first switching unit NM1 to disconnect. The first terminal of the first switching unit NM1, which is also the controlled terminal of the second switching unit NM2, can control the first and second terminals of the second switching unit NM2 to conduct. At this time, the second terminal of the third switching unit K is grounded. Since the first terminal of the third switching unit K is connected to the power supply module E through the fourth resistor R4, the power supply module E can form a circuit with the second terminal of the third switching unit K. The power supply module E outputs current to the first and second terminals of the third switching unit K through the fourth resistor R4, so that the third and fourth terminals of the third switching unit K are conducted, so that the control module 1172 conducts the drive module 120 and the external power supply 300, so that the drive module 120 supplies power to the display device 200.

[0121] To better understand the working principle of control circuit 117, the following explanation will use a battery as an example, an NMOS transistor as the second switching unit NM2, and a relay as the third switching unit K.

[0122] like Figure 5 As shown, the third switch unit K is a relay, which includes a coil and a contact group; the first end of the coil is connected to the first end of the fourth resistor R4, the second end of the coil is connected to the second end of the fourth resistor R4 and the first end of the second switch unit NM2, the first contact of the contact group is connected to the input terminal of the drive module 120, and the second contact of the contact group is connected to the external power supply 300.

[0123] When at least one of the first electrical connector 112 and the second electrical connector 113 is disconnected from the third electrical connector 115, the first switching unit NM1 is turned on, the branch containing the second resistor R2 is turned on, the second switching unit NM2 uses an NMOS transistor, the controlled terminal of the NMOS transistor is at a low level, the drain and source of the NMOS transistor are disconnected, the drain of the NMOS transistor is not grounded, the coil does not work because it cannot form a circuit with the battery, the first and second contacts of the relay are disconnected, the drive module 120 is disconnected from the external power supply 300, and no power is supplied to the display device 200.

[0124] When the third electrical connector 115 is connected to the first electrical connector 112 and the second electrical connector 113, the first switching unit NM1 is disconnected, the second switching unit NM2 uses an NMOS transistor, the controlled terminal of the NMOS transistor is at a high level, the source and drain of the NMOS transistor are connected, the branch where the fourth resistor R4 is located is connected, the first end of the coil is connected to the positive terminal of the battery through the fourth resistor R4, the second end of the coil is grounded, the battery outputs current to the coil through the fourth resistor R4, the first contact and the second contact are connected, thereby realizing the automatic connection between the drive module 120 and the external power supply 300, and the drive module 120 automatically supplies power to the display device 200.

[0125] In this embodiment of the application, by setting up a control module 1172, the drive module 120 can be automatically connected to the external power supply 300 when the first connector 111 and the second connector 114 are properly connected. This eliminates the need for testers to manually connect the drive module 120 to the external power supply 300, effectively improving the efficiency of the lamp-on test of the display device 200.

[0126] The above embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A light-on test circuit board structure applied to a light-on test device for testing a display device, the light-on test device comprising a driving module for connecting an external power supply; characterized in that, The point light test circuit board structure comprises: A first connector for electrically connecting with the driving module; the first connector has two first plug-in ends; A first electric connection and a second electric connection, a first end of the first electric connection is connected with one of the first plug-in ends, and a first end of the second electric connection is connected with another of the first plug-in ends; A second connector for electrically connecting with the display device and for plugging with the first connector; the second connector has two second plug-in ends, and the two second plug-in ends are arranged in one-to-one correspondence with the two first plug-in ends; A third electric connection, two ends of the third electric connection are respectively connected with the two second plug-in ends; and A circuit board provided with a control circuit electrically connected with a second end of the first electric connection and a second end of the second electric connection, the control circuit being used for generating a first reminding signal when at least one of the first electric connection and the second electric connection is disconnected with the third electric connection.

2. The point test circuit board structure according to claim 1, characterized by The control circuit comprises: A power supply module; and A reminding module connected with the power supply module, a second end of the first electric connection and a second end of the second electric connection; When at least one of the first electric connection and the second electric connection is disconnected with the third electric connection, the power supply module outputs a current to the reminding module to make the reminding module generate the first reminding signal.

3. The point test circuit board structure according to claim 2, characterized by The reminding module comprises: A current limiting unit, a first end of the current limiting unit is connected with one end of the power supply module; A first switch unit, a controlled end of the first switch unit is connected with a second end of the current limiting unit and a second end of the second electric connection, a first end of the first switch unit is connected with a third end of the current limiting unit, a second end of the first switch unit is connected with a second end of the first electric connection, a second end of the power supply module and ground; and A first reminding unit, a first end of the first reminding unit is connected with a fourth end of the current limiting unit, and a second end of the first reminding unit is connected with a first end of the first switch unit and a third end of the current limiting unit; When at least one of the first electric connection and the second electric connection is disconnected with the third electric connection, the first switch unit is turned on, the power supply module outputs a current to the first reminding unit through the current limiting unit to make the first reminding unit generate the first reminding signal.

4. The point test circuit board structure according to claim 3, characterized by The current limiting unit comprises: A first resistor, one end of the first resistor is connected with one end of the power supply module, and the other end of the first resistor is connected with a controlled end of the first switch unit and a second end of the second electric connection; A second resistor, one end of the second resistor is connected with one end of the first resistor and one end of the power supply module, and the other end of the second resistor is connected with a first end of the first switch unit and a second end of the first reminding unit; and A third resistor, one end of the third resistor is connected with the other end of the first resistor and the other end of the power supply module, and the other end of the third resistor is connected with the other end of the first switch unit and the other end of the second electric connection. A third resistor, one end of the third resistor is connected with one end of the second resistor, one end of the first resistor and one end of the power supply module, and the other end of the third resistor is connected with the first end of the first reminding unit.

5. The point test circuit board structure according to claim 3, wherein The reminding module further comprises: A second reminding unit, the first end of the second reminding unit is connected with the second end of the current limiting unit, and the second end of the second reminding unit is connected with the controlled end of the first switch unit and the second end of the second electrical connector; When the third electrical connector is connected with the first electrical connector and the second electrical connector, the power supply module outputs current to the second reminding unit through the current limiting unit, so that the second reminding unit generates a second reminding signal different from the first reminding signal.

6. The point test circuit board structure according to claim 3, wherein The control circuit further comprises: A control module, the first end of the control module is connected with the first end of the current limiting unit, the second end of the control module is connected with the second end of the first reminding unit, the third end of the control module is connected with the input end of the driving module, and the fourth end of the control module is connected with the external power supply; When the third electrical connector is connected with the first electrical connector and the second electrical connector, the power supply module outputs current to the control module through the current limiting unit, the third end of the control module and the fourth end of the control module are turned on, so that the driving module supplies power to the display device.

7. The point test circuit board structure according to claim 6, characterized by The control module comprises: A fourth resistor, the first end of the fourth resistor is connected with the first end of the current limiting unit; A second switch unit, the controlled end of the second switch unit is connected with the second end of the first reminding unit, the first end of the first switch unit and the third end of the current limiting unit, the first end of the second switch unit is connected with the second end of the fourth resistor, and the second end of the second switch unit is connected with the second end of the first switch unit, the second end of the first electrical connector and the other end of the power supply module and grounded; and A third switch unit, the first end of the third switch unit is connected with the first end of the fourth resistor and one end of the power supply module, the second end of the third switch unit is connected with the second end of the fourth resistor and the first end of the second switch unit, the third end of the third switch unit is connected with the input end of the driving module, and the fourth end of the third switch unit is connected with the external power supply.

8. The point test circuit board structure according to claim 7, characterized by The third switch unit is a relay, the relay comprises a coil and a contact group; the first end of the coil is connected with the first end of the fourth resistor, the second end of the coil is connected with the second end of the fourth resistor and the first end of the second switch unit, the first contact of the contact group is connected with the input end of the driving module, and the second contact of the contact group is connected with the external power supply; When the third electrical connector is connected with the first electrical connector and the second electrical connector, the first switch unit is disconnected, the second switch unit is connected, the power supply module outputs current to the coil through the fourth resistor, and the first contact and the second contact are connected to enable the driving module to supply power to the display device.

9. The point test circuit board structure according to claim 1, wherein The first connector comprises: a male head comprising two first plug-in ends and a plurality of third plug-in ends; and a first connecting wire harness connected with the plurality of third plug-in ends and electrically connected with the driving module; The second connector comprises: a female head comprising two second plug-in ends and a plurality of fourth plug-in ends; and a second connecting wire harness connected with the plurality of fourth plug-in ends and electrically connected with the display device; The male head can be plugged into the female head, the plurality of third plug-in ends are connected with the plurality of fourth plug-in ends in a corresponding manner when the two first plug-in ends are connected with the two second plug-in ends in a corresponding manner, and the first connecting wire harness is electrically connected with the second connecting wire harness.

10. A light test device, characterized by comprises: a driving module; and a light test circuit board structure according to any one of claims 1 to 9.

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