Flatness detection jig for LED backlight source module

Abstract

The utility model relates to the field of LED backlight source module production and manufacturing, in particular to an LED backlight source module flatness detection jig, which comprises a plane test board, an LED nixie tube and a PLC controller, and is characterized in that the plane test board is provided with a plurality of distance sensors and a plurality of limiting blocks; the digits of the LED nixie tubes are matched with the number of the distance sensors, and the LED nixie tubes and the distance sensors are electrically connected with the PLC. In the application, the distance sensor detects the distance data from the surface of the LED backlight source module to the distance sensor, and when the distance data is greater than a preset value, the PLC controller controls the corresponding numbers on the LED nixie tube to light, so that the problems of low working efficiency, low detection precision and the like caused by a traditional detection mode of placing the LED backlight source module on a reference surface are solved. And the flatness of each point position of the LED backlight source module is difficult to detect.

Description

Technical Field

[0001] The present application relates to the field of LED backlight module production and manufacturing, and in particular to a flatness detection fixture for LED backlight modules. Background Art

[0002] LED backlight modules are used in all aspects of daily life, and the flatness of LED backlight modules is an important indicator that affects the performance of LED backlight modules. The traditional way to detect LED backlight modules is to use a marble plane as a reference, place the LED backlight module on the reference plane, and press the four sides of the LED backlight module or use a feeler gauge as a detection tool to detect whether the LED backlight module is warped. However, this detection method has slow working efficiency and it is difficult to detect the flatness of each point of the LED backlight module. Utility Model Content

[0003] The present application provides a flatness detection jig for an LED backlight module to solve the problem of slow working efficiency and difficulty in detecting the flatness of each point of the LED backlight module, which is caused by the traditional detection method of placing the LED backlight module on a reference surface and pressing the four sides of the LED backlight module or using a feeler gauge as a detection tool to detect whether the LED backlight module is warped.

[0004] In order to solve the above technical problems, a technical solution adopted in the present application is: to provide a flatness detection fixture for an LED backlight module, the flatness detection fixture for an LED backlight module comprises:

[0005] A plane test board, on which a plurality of distance sensors and a plurality of limit blocks are arranged, the limit blocks are fixedly mounted on the surface of the plane test board, the plurality of distance sensors and the plurality of limit blocks are arranged according to the shape of the LED backlight module, the limit blocks are used to fix the position of the LED backlight module, and the distance sensor is used to detect the distance data from the surface of the LED backlight module to the distance sensor;

[0006] LED digital tube, the number of digits of the LED digital tube matches the number of the distance sensors;

[0007] PLC controller, the LED digital tube and the distance sensor are both electrically connected to the PLC controller, and when the distance data is greater than a preset value, the PLC controller controls the corresponding number on the LED digital tube to light up.

[0008] Optionally, the flatness detection jig of the LED backlight module also includes a red indicator light to prompt the user that a defective product has been detected.

[0009] Optionally, the flatness detection fixture of the LED backlight module also includes a green indicator light to prompt the user that the detection is qualified.

[0010] Optionally, the flatness detection jig of the LED backlight module further includes a base plate, and the PLC controller is fixedly mounted on the base plate.

[0011] Optionally, the flatness detection fixture of the LED backlight module further includes a side sealing plate, and the planar test plate, the bottom plate and the side sealing plate enclose a storage space, and the PLC controller is located in the storage space.

[0012] Optionally, the side sealing plate is provided with a through groove, and the through groove runs through the side sealing plate, so as to facilitate manual carrying of a flatness detection jig of the LED backlight source module.

[0013] Optionally, a power supply is also provided in the storage space.

[0014] Optionally, the flatness detection fixture of the LED backlight module further includes a screw, the distance sensor is fixedly assembled with the screw and the screw is threadedly assembled with the plane test plate, and the horizontal height of the distance sensor can be adjusted by adjusting the screw.

[0015] Optionally, the flatness detection fixture of the LED backlight module also includes a reset button.

[0016] The beneficial effect of the present application is that in the flatness detection fixture of the LED backlight module provided in the present application, the distance data from the surface of the LED backlight module to the distance sensor is detected by a distance sensor, and when the distance data is greater than a preset value, the PLC controller controls the corresponding digital light on the LED digital tube to solve the problem of slow work efficiency and difficulty in detecting the flatness of each point of the LED backlight module caused by the traditional detection method of placing the LED backlight module on a reference plane. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of a flatness detection fixture for an LED backlight module provided in an embodiment of the present application;

[0019] Figure 2It is a three-dimensional structural schematic diagram of part of the structure of the flatness detection fixture of the LED backlight module.

[0020] Explanation of the reference numerals: 100, flat test board; 110, distance sensor; 120, limit block; 130, LED digital tube; 140, red indicator light; 150, green indicator light; 160, reset button; 200, bottom plate; 300, side sealing plate; 310, through slot; 400, power supply; 500, screw; 600, PLC controller. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0022] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), such directional indications are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0023] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0024] like Figure 1 to Figure 2As shown, the present application provides a flatness detection fixture for an LED backlight module, and the flatness detection fixture for an LED backlight module includes a plane test board 100, an LED digital tube 130, and a PLC controller 600. A plurality of distance sensors 110 and a plurality of limit blocks 120 are provided on the plane test board 100, and the limit blocks 120 are fixedly assembled on the surface of the plane test board 100. The plurality of distance sensors 110 and the plurality of limit blocks 120 are arranged according to the shape of the LED backlight module, and the limit blocks 120 are used to fix the position of the LED backlight module, and the distance sensor 110 is used to detect the distance data from the surface of the LED backlight module to the distance sensor 110. The number of digits of the LED digital tube 130 matches the number of the distance sensors 110. Both the LED digital tube 130 and the distance sensor 110 are electrically connected to the PLC controller 600. When the distance data is greater than a preset value, the PLC controller 600 controls the corresponding digital light on the LED digital tube 130.

[0025] The plane test board 100 is a rectangular board. The plane test board 100 is horizontally arranged. A plurality of distance sensors 110 and a plurality of limit blocks 120 are arranged on the upper surface of the plane test board 100. The arrangement of the plurality of distance sensors 110 and the plurality of limit blocks 120 can be adaptively adjusted according to the shape of the LED backlight module. In a specific embodiment, eight distance sensors 110 are provided, and the eight distance sensors 110 are arranged in a rectangular shape. Six limit blocks 120 are provided, and the six limit blocks 120 are arranged in an orderly manner and the connection line of the six limit blocks 120 is a hexagon. In the actual working process, the position of the LED backlight module is fixed by the limit blocks 120, and the distance sensor 110 is responsible for measuring the distance data between the side of the LED backlight module close to the plane test board 100 and the sensor, and a serial number is engraved next to each distance sensor 110. In a specific embodiment, the measurement accuracy of the distance sensor 110 is 0.1mm.

[0026] The LED digital tube 130 is in a long rectangular shape, and is fixedly assembled with the flat test board 100, and is electrically connected with the PLC controller 600. The number of digits of the LED digital tube 130 matches the number of the distance sensors 110, so that each distance sensor 110 corresponds to a digit, which can intuitively display the distance data measured by the distance sensor 110 at which position exceeds the preset range. In a specific embodiment, the LED digital tube 130 is provided with eight digits.

[0027] The PLC controller 600 serves as the "brain" of the entire system, controlling the LED digital tubes 130 and all distance sensors 110. When the distance data detected by a distance sensor 110 is greater than a preset value, the PLC controller 600 will immediately control the corresponding number on the LED digital tube 130 to light up, thereby quickly indicating the specific location of the flatness problem on the LED backlight module.

[0028] To sum up, during the detection process, the LED backlight module is first placed on the flat test board 100 and its position is fixed by the limit block 120. Then, the flatness detection fixture of the LED backlight module is started, and the distance sensor 110 starts to work to detect the distance from the surface of the LED backlight module to the sensor in real time. These distance data are transmitted to the PLC controller 600 in real time for analysis. Once the distance data of a certain position exceeds the preset threshold, the PLC controller 600 will immediately respond and control the corresponding number on the LED digital tube 130 to light up. The operator can quickly discover and deal with the flatness problem at that position.

[0029] The flatness detection fixture of the LED backlight module also includes a red indicator light 140, which is fixedly assembled with the flat test board 100 and electrically connected with the PLC controller 600. The function of the red indicator light 140 is to light up when a defective product is detected, and to remind the operator in a striking manner. The addition of the red indicator light 140 further improves the detection efficiency and accuracy.

[0030] The flatness detection fixture of the LED backlight module also includes a green indicator light 150, which is fixedly assembled with the flat test board 100 and electrically connected to the PLC controller 600. In contrast to the red indicator light 140, the green indicator light 150 lights up when the distance data measured by each distance sensor 110 is qualified, providing an intuitive qualified signal to the operator, so that in the continuous detection process, the operator can quickly distinguish between qualified products and defective products, thereby improving the overall production efficiency.

[0031] The flatness detection jig of the LED backlight module also includes a bottom plate 200 and four side sealing plates 300. The bottom plate 200 is arranged parallel to and spaced apart from the plane test plate 100. The four side sealing plates 300 are arranged between the bottom plate 200 and the plane test plate 100, and the four side sealing plates 300 are perpendicular to the bottom plate 200. The PLC controller 600 is fixedly mounted on the bottom plate 200 to ensure the stability of its operation. At the same time, the plane test plate 100, the bottom plate 200 and the side sealing plates 300 jointly enclose a storage space, and the PLC controller 600 is located in the storage space. Such a design not only protects the PLC controller 600 from interference from the external environment, but also makes the structure of the flatness detection jig of the entire LED backlight module more compact.

[0032] A through groove 310 is also provided on the side sealing plate 300. The through groove 310 runs through the side sealing plate 300. The setting of the through groove 310 provides convenience for manual transportation of the flatness detection jig of the LED backlight module. The operator can easily grasp and move the jig through the through groove 310, thereby improving the transportation efficiency and operation convenience.

[0033] A power supply 400 is also provided in the storage space. The power supply 400 is fixedly assembled with the bottom plate 200. The power supply 400 provides stable and reliable power support for the flatness detection fixture of the entire LED backlight module, ensuring the continuous progress of the detection work. At the same time, the addition of the power supply 400 also makes the flatness detection fixture of the LED backlight module more flexible and convenient in use, and is no longer limited by the connection and arrangement of the external power supply 400.

[0034] The flatness detection jig of the LED backlight module also includes screws 500. Each distance sensor 110 is fixedly assembled with a screw 500, and a plurality of threaded holes are provided on the plane test board 100. The screws 500 are threadedly assembled with the plane test board 100 through the threaded holes, so that the horizontal height of the distance sensor 110 can be fine-tuned by adjusting the screws 500. Such a design not only enhances the flexibility and adjustability of the flatness detection jig of the LED backlight module, but also further improves the accuracy and reliability of the detection.

[0035] The flatness inspection fixture of the LED backlight module also includes a reset button 160, which is fixedly mounted on the flat test board 100 and electrically connected to the PLC controller 600. The reset button 160 is used to reset the display of the LED digital tube 130 to zero. After inspecting an LED backlight module product, the reset button 160 needs to be manually pressed before the next LED backlight module product can be inspected.

[0036] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. For those skilled in the art, various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be included in the protection scope of the present application.

Claims

1. A flatness detection fixture for LED backlight module, characterized in that: include: A plane test board (100), wherein a plurality of distance sensors (110) and a plurality of limit blocks (120) are provided on the plane test board (100), the limit blocks (120) are fixedly mounted on the surface of the plane test board (100), the plurality of distance sensors (110) and the plurality of limit blocks (120) are arranged according to the shape of an LED backlight module, the limit blocks (120) are used to fix the position of the LED backlight module, and the distance sensors (110) are used to detect distance data from the surface of the LED backlight module to the distance sensors (110); LED digital tubes (130), the number of digits of the LED digital tubes (130) matching the number of the distance sensors (110); A PLC controller (600), the LED digital tube (130) and the distance sensor (110) are both electrically connected to the PLC controller (600), and when the distance data is greater than a preset value, the PLC controller (600) controls the corresponding number on the LED digital tube (130) to light up.

2. The flatness detection fixture of the LED backlight module according to claim 1, characterized in that: The flatness detection jig of the LED backlight module also includes a red indicator light (140) to prompt a user that a defective product has been detected.

3. The flatness detection fixture of the LED backlight module according to claim 1, characterized in that: The flatness detection jig of the LED backlight module also includes a green indicator light (150) to prompt a user that the detection is qualified.

4. The flatness detection fixture for the LED backlight module according to claim 1, characterized in that: The flatness detection jig of the LED backlight source module further comprises a base plate (200), and the PLC controller (600) is fixedly mounted on the base plate (200).

5. The flatness detection fixture for the LED backlight module according to claim 4, characterized in that: The flatness detection fixture of the LED backlight module further comprises a side sealing plate (300); the flat test plate (100), the bottom plate (200) and the side sealing plate (300) enclose a storage space; and the PLC controller (600) is located in the storage space.

6. The flatness detection fixture for the LED backlight module according to claim 5, characterized in that: The side sealing plate (300) is provided with a through groove (310), and the through groove (310) runs through the side sealing plate (300) to facilitate manual handling of a flatness detection jig of the LED backlight source module.

7. The flatness detection fixture for the LED backlight module according to claim 6, characterized in that: A power source (400) is also provided in the storage space.

8. The flatness detection fixture for the LED backlight module according to claim 1, characterized in that: The flatness detection jig of the LED backlight module further comprises a screw (500), the distance sensor (110) and the screw (500) are fixedly assembled, and the screw (500) and the flat test plate (100) are threadedly assembled, and the horizontal height of the distance sensor (110) can be adjusted by adjusting the screw (500).

9. The flatness detection fixture for the LED backlight module according to claim 1, characterized in that: The flatness detection jig of the LED backlight module also includes a reset button (160).

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