Television voltage protection and test system

Abstract

The utility model relates to the technical field of television production, and provides a television voltage protection and test system, which comprises a power supply module, a boost module, a step-down module and a display module, the input ends of the boost module and the step-down module are both electrically connected with the power supply module, and the output ends of the boost module and the step-down module are both electrically connected with an external television; the boost module and the buck module are mutually independent and cannot operate simultaneously; the display module is arranged on the main circuit and used for detecting and displaying the voltage value of the main circuit, the system adjusts high voltage and low voltage through the independent voltage boosting module and voltage reducing module respectively, and large-batch protection testing can be completed only through one-time setting for the same product.

Description

Technical Field

[0001] The utility model relates to the technical field of television production, in particular to a television voltage protection and testing system. Background Technique

[0002] After various functional modules or functional devices on the circuit board in the television are assembled, the circuit board needs to be tested, and it can only leave the factory after passing the test. One of the tests is to test its power in the load state and no-load state, and whether the protection circuit functions normally start when inputting high voltage and low voltage. The traditional testing method requires a DC power supply powered by 12VDC and a multimeter to test the load power and no-load power, a DC power supply powered by 9.5VDC (or 10.8VDC) to test the low-voltage protection function, and a DC power supply powered by 15VDC (or 18VDC) to test the high-voltage protection function. For each test item, the input interface terminal needs to be unplugged and plugged once, the operation is relatively cumbersome, and it affects production efficiency and labor costs.

[0003] CN108668128A discloses a television automatic testing system, including a power input module, an adjustable voltage and current output module, a main control module, a remote control center, a protection module and a feedback module. The power input module supplies power to the main control module and the adjustable voltage and current output module. The input end of the feedback module is connected to the adjustable voltage and current output module, and its output end is connected to the main control module. The main control module communicates remotely with the remote control center and receives the current and voltage values transmitted by the remote control center. The main control module calculates the duty cycle and outputs a PWM wave to the adjustable voltage and current output module, and the adjustable voltage and current output module outputs the set voltage and current values. Its testing method is based on the calculation of the MCU and feedback to the current and voltage sampling and amplifying circuit, and then adjusts the voltage through a DC-DC converter, realizing automatic testing. However, its voltage needs to be adjusted for each product during each test, the voltage needs to be changed frequently, and the input cost is relatively high.

[0004] Based on this, the technical problem to be solved in this case is: how to solve the problems of many devices and cumbersome operations in television test items. Content of the Utility Model

[0005] To solve the above technical problems, the utility model provides a television voltage protection and testing system. This system adjusts high voltage and low voltage through independent boost modules and buck modules respectively, and only needs to be set once for the same kind of product to complete a large number of protection tests.

[0006] The technical solution of the utility model is:

[0007] A television voltage protection and testing system includes a power supply module, a boost module, a buck module, and a display module. The input ends of the boost module and the buck module are both electrically connected to the power supply module, and the output ends of the boost module and the buck module are both electrically connected to an external television. The boost module and the buck module are independent of each other and cannot operate simultaneously. The display module is arranged on the main circuit and is used to detect and display the voltage value of the main circuit.

[0008] One of the technical solutions in the above technical solutions of the present utility model has at least the following advantages or beneficial effects:

[0009] The present utility model adjusts high voltage and low voltage respectively through independent boost module and buck module. For the same kind of products, only one setting is required to complete a large number of protection tests. In addition, the voltage can be set or detected by observing the voltage in real time through the display module. The staff can operate after simple training, which improves the detection efficiency and accuracy. Only one plugging and unplugging of the interface terminal is required during the test, effectively improving the detection efficiency. Description of the Drawings

[0010] Figure 1 It is a schematic circuit diagram of Embodiment 1 of the present utility model. Detailed Embodiment

[0011] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0012] Embodiment 1

[0013] Please refer to Figure 1 , a television voltage protection and testing system includes a power supply module 1, a boost module 2, a buck module 3, and a display module 4. The input ends of the boost module 2 and the buck module 3 are both electrically connected to the power supply module 1, and the output ends of the boost module 2 and the buck module 3 are both electrically connected to an external television. The boost module 2 and the buck module 3 are independent of each other and cannot operate simultaneously. The display module 4 is arranged on the main circuit and is used to detect and display the voltage value of the main circuit.

[0014] The operation process of this embodiment includes two processes: setting and detecting, as detailed below.

[0015] Setting: First, turn on the step-down module 3 and observe the voltage in real time according to the display module 4, then adjust the output voltage to the low voltage protection design parameter of the product to be tested through the step-down module 3, switch to the boost module 2, similarly, observe the voltage in real time according to the display module 4, and then adjust the output voltage to the high voltage protection design parameter of the product to be tested through the boost module 2.

[0016] In this embodiment, the high voltage and the low voltage are adjusted respectively by the independent boost module 2 and the buck module 3. For the same product, only one setting is needed to complete a large number of protection tests. In addition, the voltage is set or detected by observing the voltage in real time through the display module 4. The staff can operate it after simple training, which improves the efficiency and accuracy of the detection. Only one plug-in and unplugging of the interface terminal is needed during the test, which effectively improves the efficiency of the detection.

[0017] It should be noted that the boost module 2 and the buck module 3 in this embodiment are both independent DC-DC converters.

[0018] In this embodiment, in order to detect load power and no-load power, a no-load module 5 is also included, the input end of the no-load module 5 is electrically connected to the power module 1, and the output end of the no-load module 5 is electrically connected to an external TV; the no-load module 5, the boost module 2, and the buck module 3 are independent of each other and cannot operate at the same time.

[0019] As a preferred embodiment of the present invention, a first switch is provided at the output end of the idle module 5, a second switch is provided at the output end of the boost module 2, and a third switch is provided at the output end of the buck module 3. It should be noted that in the present embodiment, the idle module 5 is the first switch.

[0020] Under the above-mentioned preference, this embodiment forms three parallel test circuits, namely no-load, boost and buck, and is used to connect to an external TV through the same output port.

[0021] As a further preference of this embodiment, the first switch, the second switch, and the third switch are all double-pole control switches; when the first switch is closed, the second switch and the third switch are disconnected; when the second switch is closed, the first switch and the third switch are disconnected; when the third switch is closed, the first switch and the second switch are disconnected.

[0022] Under the further optimization of the above, this embodiment uses a multi-position double-pole control switch to enable the power of the no-load circuit, the boost circuit, and the buck circuit to be output independently to prevent crosstalk.

[0023] In this embodiment, the input voltage of the power module 1 is 12 VDC. This design is determined based on the test requirements and is familiar to those skilled in the art, so no excessive technical description is given in this embodiment.

[0024] In this embodiment, in order for the staff to visually observe the changes in voltage, current, and power in real time, the display module 4 is a digital display electric meter.

[0025] Detection: The staff connects this system to the product to be tested.

[0026] When testing the load power and no-load power of the product, press the first switch. At this time, the second switch and the third switch are automatically cut off, and the input voltage of the product to be tested is the 12VDC power supply voltage. The digital display electric meter can accurately display the load power and no-load power of the product.

[0027] When testing the low-voltage input protection function of the product, press the second switch. The first switch and the third switch are automatically cut off, and the input voltage of the product to be tested is the output voltage of the buck module 3. And the digital display electric meter can confirm the voltage value at this time.

[0028] When testing the high-voltage input protection function of the product, press the third switch. The first switch and the second switch are automatically cut off, and the input voltage of the product to be tested is the output voltage of the boost module 2. And the digital display electric meter can confirm the voltage value at this time.

[0029] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A TV voltage protection and testing system, comprising a power module, a boost module, a buck module, and a display module, characterized in that: The input ends of the boost module and the buck module are both electrically connected to the power module, and the output ends of the boost module and the buck module are both electrically connected to an external television; the boost module and the buck module are independent of each other and cannot operate at the same time; the display module is arranged on the main circuit and is used to detect and display the voltage value of the main circuit.

2. The TV voltage protection and testing system according to claim 1, characterized in that: It also includes an idle module, the input end of the idle module is electrically connected to the power module, and the output end of the idle module is electrically connected to an external TV; the idle module, the boost module, and the buck module are independent of each other and cannot operate at the same time.

3. The TV voltage protection and testing system according to claim 2, characterized in that: A first switch is provided at the output end of the no-load module; a second switch is provided at the output end of the boost module; and a third switch is provided at the output end of the buck module.

4. The TV voltage protection and testing system according to claim 3, characterized in that: The first switch, the second switch and the third switch are all double-pole control switches; when the first switch is closed, the second switch is disconnected from the third switch; when the second switch is closed, the first switch is disconnected from the third switch; when the third switch is closed, the first switch is disconnected from the second switch.

5. The TV voltage protection and testing system according to claim 1, characterized in that: The input voltage of the power module is 12VDC.

6. The TV voltage protection and testing system according to claim 1, characterized in that: The display module is a digital display electric meter.

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