Television backlight test system

Abstract

The utility model relates to the technical field of screen assembly, and provides a television backlight test system, which comprises a detection unit and an action unit, and is characterized in that the detection unit comprises a power supply module and a switch module; the switch module is electrically connected with the power supply module; the switch module comprises a proximity switch and a socket switch used for being connected with a to-be-tested product. The action unit is used for driving the to-be-tested product to be far away from or close to the proximity switch; when the to-be-detected product is far away from the proximity switch or the to-be-detected product is not connected to the socket switch, the loop of the detection unit is disconnected; when a to-be-tested product is close to the proximity switch and the to-be-tested product is connected to the socket switch, the loop of the detection unit is switched on, and the backlight circuit of the to-be-tested product is tested. According to the system, hot plugging of workers can be avoided, on one hand, the situation that LED lamp beads in television backlight are damaged by instantaneous large current generated at the moment of hot plugging can be avoided, and on the other hand, the personal safety of the workers can be protected.

Description

Technical Field

[0001] The utility model relates to the technical field of screen assembly, in particular to a television backlight testing system. Background Art

[0002] In the production process of TV manufacturing, backlight testing is an important part of the inspection process. To visually check whether the light bar of the module is normal, whether the optical film of the module is installed correctly, whether the liquid crystal glass has defects, etc., you need to power on the backlight to confirm. In this process, generally only a DC power supply, a key switch and connecting wires are needed. According to the design parameters of the TV backlight, the current / voltage value of the DC power supply is pre-set for testing.

[0003] CN210518950U discloses a backlight current detection circuit and device. The backlight current detection circuit and device use an LED lamp array as a load to avoid the problem of overshoot current in the backlight current detection circuit damaging the backlight circuit components of a television board, and the output waveform of the backlight current will not change, thereby avoiding the problems of inaccurate test results and damage to components caused by affecting the output waveform and generating overshoot current in traditional technical solutions; and also control the number of LED lamps actually connected in the LED lamp array by adding a switch module and a control module, thereby realizing the control and switching of the load value output by the LED lamp array, thereby meeting the test requirements of different television board backlight currents.

[0004] However, this backlight current detection device still lacks a fool-proof mechanism during actual use. During the test operation, the staff often perform hot plugging, that is, plugging or unplugging the wires in the live state. In the test operation standard, the staff must first disconnect the switch to avoid the instantaneous large current generated at the moment of plugging or unplugging the wires to damage the LED lamp beads in the TV backlight. In actual production, operators will perform hot plugging because they find it troublesome or forget or in order to complete the operation faster. Obviously, plugging and unplugging the backlight without turning off the switch will undoubtedly plant a mine that may explode at any time for the quality problem of the product backlight. The next process may find that the backlight has burned out and is not bright, or it may suddenly not light up after using it for a period of time.

[0005] Based on this, the technical problem solved in this case is: how to solve the problems caused by hot plugging. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a TV backlight testing system. The system can prevent workers from performing hot plugging. On the one hand, it can prevent the instantaneous large current generated at the moment of hot plugging from damaging the LED lamp beads in the TV backlight, and on the other hand, it can protect the personal safety of workers.

[0007] The technical solution of the utility model is:

[0008] A TV backlight test system includes a detection unit and an action unit. The detection unit includes a power module and a switch module. The switch module is electrically connected to the power module. The switch module includes a proximity switch and a socket switch for connecting a product to be tested. The action unit is used to drive the product to be tested to move away from or approach the proximity switch.

[0009] When the product to be tested is away from the proximity switch or the product to be tested is not connected to the socket switch, the circuit of the detection unit is disconnected;

[0010] When the product to be tested is close to the proximity switch and connected to the socket switch, the circuit of the detection unit is connected to test the backlight circuit of the product to be tested.

[0011] One of the above technical solutions of the utility model has at least one of the following advantages or beneficial effects:

[0012] The utility model uses a switch module on the detection unit, including a proximity switch and a socket switch, and the two switches jointly control whether the circuit is connected. The circuit is connected only when the action unit brings the product to be tested close to the proximity switch and the product to be tested is connected to the socket switch. In this way, the staff can be prevented from performing hot plugging. On the one hand, it can avoid the instantaneous large current generated at the moment of hot plugging to damage the LED lamp beads in the TV backlight, and on the other hand, it can protect the personal safety of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the working state of the embodiment 1 of the utility model in a closed circuit state;

[0014] Figure 2 This is a schematic diagram of the operation of Example 1 of the utility model in an open circuit state. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] Example 1

[0017] See also Figure 1 , 2A TV backlight test system includes a detection unit 1 and an action unit 2. The detection unit 1 includes a power module 101 and a switch module; the switch module is electrically connected to the power module 101; the switch module includes a proximity switch 102 and a socket switch 103 for connecting a product to be tested; the action unit 2 is used to drive the product to be tested to move away from or approach the proximity switch 102;

[0018] When the product to be tested is away from the proximity switch 102 or the product to be tested is not connected to the socket switch 103, the circuit of the detection unit 1 is disconnected;

[0019] When the product to be tested is close to the proximity switch 102 and connected to the socket switch 103, the circuit of the detection unit 1 is connected to test the backlight circuit of the product to be tested.

[0020] In actual application, when the product to be tested is away from the proximity switch 102 , the staff can connect or unplug the product to be tested from the socket switch 103 .

[0021] This embodiment uses a switch module on the detection unit 1, including a proximity switch 102 and a socket switch 103. The two switches jointly control whether the circuit is connected. The circuit is connected only when the product to be tested is close to the proximity switch 102 and the product to be tested is connected to the socket switch 103. In this way, the staff can avoid hot plugging. On the one hand, it can avoid the instantaneous large current generated at the moment of hot plugging to damage the LED lamp beads in the TV backlight, and on the other hand, it can protect the personal safety of the staff.

[0022] In order to further ensure the safety of the test system, the detection unit 1 also includes a relay 104; the relay 104 is electrically connected to the power module 101. Its working principle is: when the product to be tested is far away from the proximity switch 102 and is not within the action range, the contact of the proximity switch 102 will be in a disconnected state, at this time the relay 104 circuit is blocked and has no action, the relay 104 is in an open circuit state, the backlight socket is not powered, and the power-off plugging operation is realized. On the contrary, when the product to be tested is close to the proximity switch 102, the relay 104 is in a closed loop state, the power module 101 supplies power to the product to be tested, and the staff observes whether the product to be tested is working normally.

[0023] In practical applications, the proximity switch 102 is connected to the circuit of the detection unit 1 through an adapter 105 .

[0024] In addition, the socket switch 103 is a backlight socket; and the power module 101 is a direct current power supply.

[0025] As a preferred embodiment of the present invention, the action unit 2 is a support frame 21; the support frame 21 includes a fixed support 211 and a rotating component 212 arranged on the support 211; the rotating component 212 includes a flip rod 2121 and a fixed plate 2122; one end of the flip rod 2121 is hinged on the support 211, and the other end of the flip rod 2121 is a free end; the fixed plate 2122 is arranged on the free end of the flip rod 2121.

[0026] Under the above-mentioned preference, the staff can place the product to be tested firmly on the support frame 21 through the fixing plate 2122. The flip rod 2121 itself has a certain damping force and can bear the weight of the product to be tested. In actual application, the staff can adjust the angle of the flip rod 2121 to flip the product to be tested, so as to move away from or close to the proximity switch 102 at the upper end. Not only is the operation quick, simple and convenient, but it can also accurately limit the moving distance, further avoiding the occurrence of hot plugging.

[0027] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A TV backlight test system, comprising a detection unit and an action unit, characterized in that: The detection unit includes a power module and a switch module; the switch module is electrically connected to the power module; the switch module includes a proximity switch and a socket switch for connecting the product to be tested; the action unit is used to drive the product to be tested to move away from or approach the proximity switch; When the product to be tested is away from the proximity switch or the product to be tested is not connected to the socket switch, the circuit of the detection unit is disconnected; When the product to be tested is close to the proximity switch and connected to the socket switch, the circuit of the detection unit is connected to test the backlight circuit of the product to be tested.

2. The TV backlight test system according to claim 1, characterized in that: The detection unit also includes a relay; the relay is electrically connected to the power module.

3. The TV backlight testing system according to claim 1, characterized in that: The proximity switch is connected to the circuit of the detection unit through an adapter.

4. The TV backlight testing system according to claim 1, characterized in that: The socket switch is a backlight socket.

5. The TV backlight testing system according to claim 1, characterized in that: The power supply module is a direct current power supply.

6. The TV backlight testing system according to claim 1, characterized in that: The action unit is a support frame; the support frame includes a fixed support and a rotating component arranged on the support; the rotating component includes a flip rod and a fixed plate; one end of the flip rod is hinged on the support and the other end of the flip rod is a free end; the fixed plate is arranged on the free end of the flip rod.

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