High-voltage test and backlight test combining device

Abstract

The utility model relates to the technical field of board card testing, in particular to a high-voltage testing and backlight testing merging device which comprises a main control module and a plurality of testing devices which are all in signal connection with the main control module. The testing device comprises a first switch combination module, a second switch combination module, a third switch control module, a tool testing module, a high-voltage testing module and an electronic load instrument. According to the high-voltage test and backlight test merging device provided by the utility model, one main control module is connected with a plurality of test devices, so that one tester can simultaneously operate high-voltage test and backlight test functions of a plurality of television board cards, and the efficiency is obviously improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of board card test, especially to a high voltage test and backlight test combined device. BACKGROUND

[0002] In the current electronic manufacturing industry, the production process of a three-in-one TV board card (a TV mainboard integrating tuner, decoder and power management functions) with AC power involves multiple testing steps to ensure product quality. Among them, high voltage test and backlight test are two key quality control links:

[0003] High voltage test: mainly used to detect whether the TV board card can withstand the specified voltage level without electrical breakdown or other electrical faults. This test is crucial to ensure user safety.

[0004] Backlight test: used to verify whether the backlight source of the LCD screen is working normally, including brightness, uniformity, etc.

[0005] Currently, most manufacturers adopt the way of separating the two test steps, i.e., first completing high voltage test at one station and then moving to another station for backlight test. This approach usually relies on manual judgment, not only increasing the operation complexity, but also leading to the following problems:

[0006] Low test efficiency: since high voltage test and backlight test need to be performed at different stations respectively, and the results need to be judged manually after each test, it greatly prolongs the time of the entire test process. In addition, the transfer of products between different stations also consumes additional time and human resources.

[0007] High risk of human error: manual judgment method is easily affected by subjective factors, which may lead to misjudgment or missed detection. For example, the operator may ignore some subtle but important defects due to fatigue, thereby affecting the quality of the final product.

[0008] Low equipment utilization: the existing test process requires special equipment and space for each test step, resulting in low overall equipment utilization and increasing the operating cost of the enterprise.

[0009] Complex production line layout: in order to meet the above test requirements, the production line often needs to be designed more complex, increasing the difficulty of equipment installation and maintenance. At the same time, this also limits the flexibility of the production line, making it difficult to quickly respond to changes in market demand.

[0010] With the increasing demand of high quality electronic products by consumers and the intensifying market competition, improving production efficiency and reducing production cost become the goal pursued by manufacturers. Especially in the field of large-scale production such as TV board, how to optimize the test process and reduce unnecessary procedures and manpower input becomes a problem to be solved. SUMMARY

[0011] The high-voltage test and backlight test combined device integrates high-voltage test and backlight test together, and can simultaneously perform high-voltage and backlight test, so that the test efficiency is higher.

[0012] In order to solve the above technical problems, the utility model discloses the following technical scheme: a high-voltage test and backlight test combined device, including main control module and a plurality of test devices, a plurality of test devices all with main control module signal connection, test device includes first switch combination module, second switch combination module, third switch control module, tool test module, high-voltage test module and electronic load instrument,

[0013] The tool test module is used for installing the tool to be tested, and is provided with a primary discharge capacitor, a secondary discharge capacitor and a backlight test end.

[0014] The enabling end of the first switch combination module and the second switch combination module is connected with the main control module, one switch input end of the first switch combination module is connected with the high-voltage test module, the other switch input end of the first switch combination module is connected with the second switch combination module, one switch input end of the second switch combination module is connected with external alternating voltage, the other switch input end of the second switch combination module is connected with cement resistance, the output end of the first switch combination module is connected with the primary discharge capacitor of the tool test module, and the output end of the second switch combination module is connected with the secondary discharge capacitor through the third switch control module.

[0015] The electronic load instrument is connected with the third switch control module, and the backlight test is performed by detecting the backlight test end of the electronic load instrument through the main control module.

[0016] Preferably, the first switch combination module includes a first control switch and a first auxiliary switch, and the second switch combination module includes a second control switch and a second auxiliary switch.

[0017] The enable end of the first control switch is connected with the master control module, the input end of the first control switch is connected with the high-voltage test module, the output end of the first control switch is connected with the output end of the first auxiliary switch, and the output end of the first auxiliary switch is connected with the primary discharge capacitor of the tool test module; the input end of the first auxiliary switch is connected with the output end of the second control switch;

[0018] The enable end of the second control switch is connected with the master control module, the input end of the second control switch is connected with the external alternating voltage, the input end of the second auxiliary switch is connected with a plurality of cement resistors, and the output end of the second auxiliary switch is connected with the secondary discharge capacitor through the third switch control module.

[0019] Preferably, the first control switch and the second control switch are both alternating contactors, and the first auxiliary switch and the second auxiliary switch are both auxiliary switches.

[0020] Preferably, the third switch control module is a relay.

[0021] The utility model discloses the beneficial effect:

[0022] 1) one master control module connects a plurality of test devices, so that one tester can simultaneously operate the high-voltage test and backlight test functions of multiple television board cards, and the efficiency is obviously improved.

[0023] 2) the high-voltage test and backlight test are realized through the master control module to realize test control, and effectively prevent the misjudgment or missed test caused by personnel subjective consciousness or fatigue. DRAWINGS

[0024] Figure 1 It is the circuit schematic diagram of the utility model. DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of those skilled in the art, the utility model is further illustrated below in combination with examples and drawings, and the content mentioned in the implementation manner is not a limitation on the utility model. The utility model is described in detail below in combination with the drawings.

[0026] The high-voltage test and backlight test combined device provided in the embodiment is as shown in Figure 1 , comprising a master control module and a plurality of test devices, and the plurality of test devices are signal-connected with the master control module;The test device comprises a first switch combination module, a second switch combination module, a third switch control module, a tool test module, a high-voltage test module and an electronic load instrument;The tool test module is used for installing the tool to be tested, and the tool test module is provided with a primary discharge capacitor, a secondary discharge capacitor and a backlight test end;

[0027] The enable terminals of both the first and second switch combination modules are connected to the main control module. One switch input terminal of the first switch combination module is connected to the high-voltage test module, and the other switch input terminal of the first switch combination module is connected to the second switch combination module. One switch input terminal of the second switch combination module is connected to an external AC voltage, and the other switch input terminal of the second switch combination module is connected to a cement resistor. The output terminal of the first switch combination module is connected to the primary discharge capacitor of the tooling test module, and the output terminal of the second switch combination module is connected to the secondary discharge capacitor through a third switch control module. The electronic load instrument is connected to the third switch control module, and the backlight test is performed by detecting the backlight test terminal of the electronic load instrument through the main control module.

[0028] The first switch combination module (i.e., AC contactor and auxiliary device combination 1) includes a first control switch and a first auxiliary switch, and the second switch combination module (i.e., AC contactor and auxiliary device combination 2) includes a second control switch and a second auxiliary switch.

[0029] The enable terminal of the first control switch is connected to the main control module, the input terminal of the first control switch is connected to the high voltage test module, the output terminal of the first control switch is connected to the output terminal of the first auxiliary switch, and the output terminal of the first auxiliary switch is connected to the primary discharge capacitor of the tooling test module, and the input terminal of the first auxiliary switch is connected to the output terminal of the second control switch.

[0030] The enable terminal of the second control switch is connected to the main control module, the input terminal of the second control switch is connected to an external AC voltage, the input terminal of the second auxiliary switch is connected to several cement resistors, and the output terminal of the second auxiliary switch is connected to a secondary discharge capacitor through a third switch control module.

[0031] Specifically, such as Figure 1 The diagram shown is a circuit schematic of this embodiment. The first control switch and the second control switch are both AC contactors, the first auxiliary switch and the second auxiliary switch are both auxiliary devices, the third switch control module is a relay, the high voltage test module and the electronic load instrument are all existing technologies, and the structure of the AC contactor and the auxiliary device itself is also existing technology. Therefore, the specific device structure will not be described in detail here.

[0032] The purpose of this embodiment is to provide a combined high-voltage testing and backlight testing device for TV boards, enabling one employee to test 4 TV three-in-one motherboards simultaneously, effectively improving testing efficiency. The specific working principle of this embodiment is as follows:

[0033] I. Main Control Module:

[0034] TV board high voltage tester parameters and backlight test electronic load instrument parameters can be configured by script;

[0035] The logic switching between high voltage and backlight test is realized by controlling AC contactor and auxiliary combination 1, AC contactor and auxiliary combination 2, 24VDC relay, test tooling, etc.

[0036] The TV three-in-one board SN can be recorded by scanning the code, and the test results are automatically uploaded to the MES system record;

[0037] The main control module is connected with the high voltage tester communication and test state interface, which is used for: 1) setting high voltage tester test parameters; 2) reading high voltage tester state, such as PASS, NG, etc. state; 3) controlling high voltage equipment TEST, RESET;

[0038] The main control module is connected with the electronic load instrument communication and test state interface, which is used for: 1) setting electronic load test parameters; 2) reading electronic load test state value, such as PASS, NG, etc. state.

[0039] II. AC contactor and auxiliary combination 1: high voltage test connection line control

[0040] The AC contactor AC-3 adopts the normally open function, when A1, A2 is high (DC24V), the high voltage connection line L1, L2, L3 is respectively connected with T1, T2, T3, which can realize high voltage test, at the same time, 220V AC L / N in the auxiliary F4-04 is normally closed, 51NC and 52NC are disconnected, 61NC and 62NC are disconnected, which can realize 220V AC disconnection, and finally realize mechanical exclusion of high voltage and 220V AC;

[0041] III. AC contactor and auxiliary combination 2: 220V AC connection line control

[0042] The AC contactor AC-3 adopts the normally open function, when A1, A2 is high (DC24V), the 220V AC connection line T1, T2 is respectively connected with L1, L2, which is connected with the auxiliary F4-04 in the AC contactor and auxiliary combination 1 to realize 220V AC power supply for TV three-in-one board, and at the same time realizes mechanical exclusion with high voltage connection.

[0043] IV. TV three-in-one main board primary discharge control

[0044] When the high voltage test line is connected to the main board, the auxiliary F4-04 in the AC contactor and auxiliary combination 1 is disconnected, when the 220V AC power supply line is connected to the main board, the auxiliary F4-04 in the AC contactor and auxiliary combination 2 is disconnected, only when the high voltage line and 220V AC line are disconnected from the main board at the same time, the two auxiliary F4-04 are connected at the same time, realizing the primary capacitor discharge function;

[0045] Five, TV three-in-one motherboard secondary discharge control

[0046] When the high-voltage test line is connected to the mainboard, the 24VDC relay normally closed function 1NC, 2NC is disconnected with 9, 10 respectively, when the 220V AC power supply line is connected to the mainboard, the AC contactor and the auxiliary F4-04 in the auxiliary combination 2 are disconnected, only when the high-voltage line and the 220V AC line are disconnected at the same time, the 24VDC relay and the AC contactor and the auxiliary F4-04 in the auxiliary combination 2 are turned on at the same time, the secondary capacitor discharge function is realized;

[0047] Six, backlight current detection control

[0048] Backlight current detection connects electronic load equipment, when high-voltage test is disconnected, 220V AC is turned on, 24VDC relay normally closed function is turned on, electronic load can collect the current value of the mainboard, when high-voltage test is disconnected, 220V AC is turned off, 24VDC relay normally closed function is turned off, electronic load is disconnected with the backlight interface of the mainboard.

[0049] Seven, control principle

[0050] The main control module can control four ways, realize a staff test four TV three-in-one motherboard, take the first way as an example, as shown in the figure, the control principle of the other three ways is the same: Figure 1

[0051] 1. Press down the tool--->SW1 reads high level 12V;

[0052] 2. The main control module B1 interface sets low level 0V, controls the AC contactor and the auxiliary F4-04 in the auxiliary combination 2 AC-3 normally open function to be disconnected, 220V AC is disconnected, F4-04 normally closed function is turned on, at the same time reads E1 state == 0V to ensure that the mechanical control logic is correct; The final purpose is to disconnect the 220V AC power supply;

[0053] 3. The main control module A1 interface sets high level 24V, controls the AC contactor and the auxiliary F4-04 in the auxiliary combination 1 AC-3 normally open function to be turned on, the high-voltage connection line and the TV board card are connected, F4-04 normally closed function is disconnected, ensures that the primary discharge resistor is disconnected, at the same time reads C1 == 24V, other three ways C2, C3, C4 == 0V, ensures that this way high-voltage connection is normal, other three ways high-voltage connection is disconnected, prevent high-voltage multiple TV board cards from causing staff electric shock; Purpose: ensure that the high-voltage test is connected with the TV board card before the high-voltage connection line, and the high-voltage connection of the other three ways is disconnected;

[0054] ​4. High-voltage test, read high-voltage device state, PASS, NG, PROCE, only read PASS state to proceed to the next step, read NG, indicating that the high-voltage test fails, stop testing, and upload test results, read PROCE indicating that the high-voltage test is in progress, wait for the high-voltage test to end before proceeding to the next step;

[0055] 5. After the high-voltage test, the main control module A1 interface sets low voltage 0V, controls the AC contactor and the auxiliary device combination 1 AC-3 normally open function to disconnect, the high-voltage connection line and the TV board card are disconnected, the F4-04 normally closed function is turned on, ensuring that 220V AC is connected to the main board, and at the same time reading the state C1 == 0V, ensuring that the high-voltage connection is disconnected; the 24VDC relay normally closed function is turned on, ensuring that the electronic load is connected to the TV board card backlight interface;

[0056] 6. The main control module B1 interface sets high voltage 24V, controls the AC contactor and the auxiliary device combination 2 AC-3 normally open function to turn on, 220V AC to turn on, F4-04 normally closed function to turn off, ensuring that the primary discharge is disconnected, and at the same time reading E1 state == 24V to ensure that the mechanical control logic is correct; the final goal: to supply 220V AC to the main board;

[0057] 7. The main control module reads the electronic load device backlight state, LED == 1 for backlight test PASS, LED == 0 for backlight test NG;

[0058] 8. After the primary and secondary discharges wait for 1 second, the main control module confirms the final high-voltage and primary test results and automatically uploads the MES system;

[0059] 9. The other three main board high-voltage and backlight test control logics are the same, and the shell realizes the test work of four TV main boards, effectively improving the work efficiency.

[0060] This embodiment realizes:

[0061] 1. Significantly improve test efficiency: complete high-voltage and backlight tests at the same station, reduce product transfer time between different stations, and greatly improve overall test speed.

[0062] 2. Reduce human error probability: use automated testing and judgment mechanism to eliminate uncertainty and errors caused by manual intervention, improve test result accuracy and reliability.

[0063] 3. Optimize equipment utilization: simplify production line layout, reduce the number of required equipment and floor area, and reduce equipment investment and maintenance costs.

[0064] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application is disclosed as above in the preferred embodiment, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the disclosed technical content without departing from the technical solution of the present application, and any equivalent embodiment with equivalent changes is equivalent to the above embodiment. Any simple modification, equivalent change and modification of the above embodiment according to the present application technical solution are within the scope of the present application technical solution.

Claims

1. A high voltage test and backlight test combined apparatus, characterized by: The test device comprises a master control module and a plurality of test devices, the plurality of test devices are in signal connection with the master control module, the test device comprises a first switch combination module, a second switch combination module, a third switch control module, a tool test module, a high-voltage test module and an electronic load instrument. The tool test module is used for mounting a tool to be tested, and is provided with a primary discharge capacitor, a secondary discharge capacitor and a backlight test end. The enable ends of the first switch combination module and the second switch combination module are connected with the master control module, one switch input end of the first switch combination module is connected with the high-voltage test module, another switch input end of the first switch combination module is connected with the second switch combination module, one switch input end of the second switch combination module is connected with an external alternating voltage, another switch input end of the second switch combination module is connected with a cement resistor, the output end of the first switch combination module is connected with the primary discharge capacitor of the tool test module, and the output end of the second switch combination module is connected with the secondary discharge capacitor through the third switch control module. The electronic load instrument is connected with the third switch control module, and the backlight test is performed by detecting the backlight test end of the electronic load instrument through the master control module.

2. The combined high voltage and backlight testing device of claim 1, wherein: The first switch combination module comprises a first control switch and a first auxiliary switch, and the second switch combination module comprises a second control switch and a second auxiliary switch. The enable end of the first control switch is connected with the master control module, the input end of the first control switch is connected with the high-voltage test module, the output end of the first control switch is connected with the output end of the first auxiliary switch, and the output end of the first auxiliary switch is connected with the primary discharge capacitor of the tool test module, and the input end of the first auxiliary switch is connected with the output end of the second control switch. The enable end of the second control switch is connected with the master control module, the input end of the second control switch is connected with an external alternating voltage, the input end of the second auxiliary switch is connected with a plurality of cement resistors, and the output end of the second auxiliary switch is connected with the secondary discharge capacitor through the third switch control module.

3. The combined high voltage and backlight testing device of claim 2, wherein: The first control switch and the second control switch are both alternating contactors, and the first auxiliary switch and the second auxiliary switch are both auxiliaries.

4. The combined high voltage and backlight testing device of claim 1, wherein: The third switch control module is a relay.

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