LED backlight brightness detection device and method

Abstract

The invention discloses an LED backlight brightness detection device and method, and belongs to the detection field, the LED backlight brightness detection device comprises a main body, the main body is internally provided with two clamping plate assemblies, and the two clamping plate assemblies are used for clamping an LED backlight; the clamping cavity is positioned at the top end in the main body and is used for storing an LED backlight source; the power assembly is located in the main body and used for driving the two clamping plate assemblies to move relatively; the clamping plate assembly comprises a plurality of sets of rotating blocks, and rotating grooves are formed in the bottom ends of one sides of the multiple sets of rotating blocks. A rotating button is pulled to move upwards, the rotating button drives an inserting column with a dodecagonal transverse base plane to move upwards, the inserting column leaves away from a rotating block and an inserting groove in the rotating column, two adjacent rotating blocks are rotated under the action of mutual cooperation of the rotating column and a rotating groove, and the inclination angle between the two adjacent rotating blocks is adjusted; and the steps are repeated to complete the adjustment of the multiple groups of rotating blocks, so that the shape of the inner side of the clamping plate assembly is adjusted, and the LED backlight sources with different shapes are clamped and fixed.

Description

Technical Field

[0001] This invention relates to the field of testing, specifically to an LED backlight brightness testing device and method. Background Technology

[0002] LED backlights convert point light sources into uniform surface light sources through a light guide plate, and then optimize the light distribution through optical components such as diffuser plates and brightness enhancement films. RGB-LED technology improves contrast and color accuracy by dynamically controlling the three-color light source in zones. White LEDs generate white light by exciting phosphors with blue light chips. In LED backlight production, in order to improve the yield rate of products, LED backlight brightness detection devices are used to conduct random inspections of products. LED backlight brightness testing devices are used in two ways: manual and machine testing. Manual testing relies on human judgment, which is highly subjective and reduces the accuracy of random sampling. Therefore, most production lines choose testing devices to test products. The brightness detector in the device tests the product and inputs the test data into a computer for comparison with accurate data to determine whether the product is up to standard. However, in current LED backlight brightness detection devices, the different shapes of LED backlights mean that the device cannot effectively clamp the LED backlights, resulting in unstable detection position of the brightness detector and reduced detection accuracy. Summary of the Invention

[0003] To solve the above-mentioned technical problems, an LED backlight brightness detection device and method are provided. This technical solution solves the problem mentioned in the background art that the device cannot effectively clamp the LED backlight when the LED backlight has different shapes.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: An LED backlight brightness detection device includes a main body, and two clamping plate assemblies are installed inside the main body for clamping the LED backlight. The clamping cavity located at the top of the main body is used to store the LED backlight; The power component located inside the main body is used to drive the two card plate assemblies to move relative to each other; The card plate assembly includes multiple sets of rotating blocks. A rotating groove is formed at the bottom of one side of each set of rotating blocks. A rotating column that cooperates with the rotating groove is fixed at the bottom of one side of each set of rotating blocks. A slot is formed inside the rotating column and on one side of the rotating block. A plug is installed inside the slot. A rotating knob is fixed at the top of the plug. The cross-section of the plug and the slot is dodecagonal.

[0005] Preferably, the power assembly includes a bottom sliding groove located inside the clamping cavity, and an installation cavity is provided at the bottom of the main body. A transmission disc is slidably connected inside the installation cavity, and transmission rods are rotatably connected to both sides of the transmission disc. A sliding block that cooperates with the sliding groove is rotatably connected to the end of the transmission rod.

[0006] Preferably, the bottom of one set of rotating blocks is fixedly connected to the sliding block, and the outer sides of multiple sets of rotating blocks are wrapped with rubber sleeves.

[0007] Preferably, the power assembly further includes a reset component for resetting the transmission disc. The reset component includes a pull rod located at one end of the transmission disc, the pull rod extending through to the outside of the main body and being slidably connected to the main body. A reset spring is installed at the other end of the transmission disc, and the end of the reset spring is connected to the inner wall of the mounting cavity.

[0008] Preferably, the power assembly further includes a stabilizer for limiting the movement of the transmission disk. The stabilizer includes a groove formed at the bottom of the mounting cavity, and a slider that cooperates with the groove is fixed to the bottom of the transmission disk.

[0009] Preferably, an electric push rod is installed at the middle position on both sides of the main body, the output end of the electric push rod is connected to a mounting plate, and a limit block is fixed on one side of the mounting plate.

[0010] Preferably, a cover plate is rotatably connected to the top of the main body, and both ends of the cover plate are provided with limiting grooves that cooperate with the limiting block. The limiting block is cylindrical, and a bearing is rotatably connected to the outer side of the limiting block.

[0011] Preferably, a detection chamber is provided at the bottom of the cover plate, and multiple brightness detectors are installed inside the detection chamber. A sealing gasket is provided at the bottom of the cover plate.

[0012] Preferably, the detection method is as follows; S1: Simultaneously start two electric push rods. The electric push rods drive the cover plate to move upward. Then, manually pull the pull rod to move it outward. At this time, the pull rod drives the transmission plate to move to one side. The transmission plate drives the sliding block to move outward through the transmission rod. Under the action of the sliding block and the sliding groove, the two card plate assemblies are separated. S2: Then, place the qualified LED backlight into the clamping cavity and connect the power supply to the LED backlight. Then, the electric push rod drives the seal between the cover plates. At this time, release the pull rod. Under the action of the reset spring, the transmission plate quickly resets. The transmission plate drives the clamping plate assembly to move inward through the transmission rod to clamp and fix the LED backlight. Then, start multiple sets of brightness detectors to test the LED backlight and record and transmit the data from the multiple sets of brightness detectors into the computer. S3: Repeat S1 to remove the qualified LED backlights. Then repeat S1 to put the untested LED backlights into the clamping cavity and start the brightness detector to test the brightness of the LED backlights. The test data is then transmitted to the computer. S4: Compare the test data in S3 with the test data in S2. When the difference is within a certain range, the quality is qualified; when the difference exceeds the range, the quality is unqualified.

[0013] Compared with the prior art, the present invention provides an LED backlight brightness detection device and method, which has the following beneficial effects: 1. By pulling the rotating knob upward, the rotating knob drives the dodecagonal insert to move upward. The insert leaves the slot inside the rotating block and the rotating slot. Under the action of the rotating block and the rotating slot, rotate two adjacent rotating blocks and adjust the tilt angle between the two adjacent rotating blocks. Repeat the above steps to complete the adjustment of multiple sets of rotating blocks, thereby adjusting the shape of the inner side of the clamping plate assembly, so as to adapt to the clamping and fixing of LED backlights of different shapes. 2. Move the lever manually. The lever moves the transmission disc to one side. At the same time, the transmission disc rotates the transmission rod, and the end of the transmission rod moves two sliding blocks outward. The sliding blocks then move the two clamping plate assemblies outward. Place the LED backlight to be tested into the clamping cavity. Release the lever. Under the action of the return spring, the transmission disc quickly returns to its original position. The transmission disc then moves the sliding blocks inward through the transmission rod. The sliding blocks clamp the LED backlight with the clamping plate assemblies. This ensures that the brightness detector installed inside the cover plate detects the same LED backlight model at the same position, thereby improving detection accuracy. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the connection of the card plate assembly of the present invention; Figure 4 This is an internal sectional view of the present invention; Figure 5 This is a schematic diagram of the connection of the rotating block of the present invention; Figure 6 This is an enlarged view of invention A.

[0015] The numbers on the map are: 1. Main body; 2. Electric push rod; 3. Cover plate; 4. Pull rod; 5. Sliding groove; 6. Mounting cavity; 7. Clamping plate assembly; 701. Rotating block; 702. Rotating knob; 703. Rotating groove; 704. Rotating column; 705. Slot; 706. Insertion column; 8. Sliding block; 9. Clamping cavity; 10. Return spring; 11. Transmission disc; 12. Transmission rod; 13. Slider; 14. Sliding groove; 15. Limiting groove; 16. Mounting plate; 17. Limiting block. Detailed Implementation

[0016] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0017] Example 1

[0018] Please refer to Figures 1-6 As shown, an LED backlight brightness detection device includes a main body 1, and two clamping plate assemblies 7 are installed inside the main body 1 for clamping the LED backlight. The clamping cavity 9 located at the top of the interior of the main body 1 is used to store the LED backlight; The power component located inside the main body 1 is used to drive the two card plate assemblies 7 to move relative to each other; The card assembly 7 includes multiple sets of rotating blocks 701. A rotating groove 703 is provided at the bottom of one side of the multiple sets of rotating blocks 701. A rotating column 704 that cooperates with the rotating groove 703 is fixed at the bottom of one side of the multiple sets of rotating blocks 701. A slot 705 is provided inside the rotating column 704 and on one side of the rotating block 701. A plug 706 is installed inside the slot 705. A rotating knob 702 is fixed at the top of the plug 706. The cross-section of the plug 706 and the slot 705 is dodecagonal. A rubber sleeve is wrapped around the outside of the multiple sets of rotating blocks 701. The rubber sleeve has a certain deformation to assist the rotation of the rotating blocks 701 and can also clamp and protect the LED backlight. In this embodiment, by pulling the rotating knob 702 upward, the rotating knob 702 drives the dodecagonal insertion post 706 to move upward. The insertion post 706 leaves the slot 705 in the rotating block 701 and the rotating post 704. Under the action of the rotating post 704 and the rotating slot 703, two adjacent rotating blocks 701 are rotated, and the tilt angle between the two adjacent rotating blocks 701 is adjusted. The above steps are repeated to complete the adjustment of multiple sets of rotating blocks 701, thereby adjusting the shape of the inner side of the clamping plate assembly 7, so as to adapt to the clamping and fixing of LED backlights of different shapes. Example 2 Please refer to Figure 2 and Figure 3 and Figure 4As shown, the power assembly includes a bottom sliding groove 5 located inside the clamping cavity 9. The bottom of the main body 1 is provided with an installation cavity 6. A transmission disk 11 is slidably connected inside the installation cavity 6. Transmission rods 12 are rotatably connected to both sides of the transmission disk 11. A sliding block 8 that cooperates with the sliding groove 5 is rotatably connected to the end of the transmission rod 12. The bottom of a set of rotating blocks 701 is fixedly connected to the sliding block 8. The power assembly also includes a reset component for driving the transmission disk 11 to reset. The reset component includes a pull rod 4 located at one end of the transmission disk 11. The pull rod 4 extends through to the outside of the main body 1 and is slidably connected to the main body 1. A reset spring 10 is installed at the other end of the transmission disk 11. The end of the reset spring 10 is connected to the inner wall of the installation cavity 6. In this embodiment, the pull rod 4 is moved by hand, which moves the transmission disk 11 to one side. At this time, the transmission disk 11 drives the transmission rod 12 to rotate, and the end of the transmission rod 12 drives the two sliding blocks 8 to move outward. The sliding blocks 8 drive the two clamping plate assemblies 7 to move outward. Then, the LED backlight to be tested is placed into the clamping cavity 9. The pull rod 4 is released, and the transmission disk 11 quickly resets under the action of the reset spring 10. At this time, the transmission disk 11 drives the sliding blocks 8 to move inward through the transmission rod 12. The sliding blocks 8 drive the clamping plate assemblies 7 to clamp the LED backlight, so that the brightness detector installed inside the cover plate 3 can detect the same type of LED backlight at the same position, thereby improving the detection accuracy. Example 3 Please refer to Figure 3 and Figure 4 As shown, the power assembly also includes a stabilizer for limiting the movement of the transmission disk 11. The stabilizer includes a groove 14 opened at the bottom of the mounting cavity 6, and a slider 13 that cooperates with the groove 14 is fixed at the bottom of the transmission disk 11. In this embodiment, the sliding block 13 and the sliding groove 14 cooperate with each other to make the movement of the transmission disk 11 more stable; Example 4 Please refer to Figure 1 and Figure 6 As shown, an electric push rod 2 is installed at the middle position on both sides of the main body 1. The output end of the electric push rod 2 is connected to a mounting plate 16. A limit block 17 is fixed on one side of the mounting plate 16. A cover plate 3 is rotatably connected to the top of the main body 1. Both ends of the cover plate 3 are provided with limit grooves 15 that cooperate with the limit block 17. The limit block 17 is cylindrical. A bearing is rotatably connected to the outer side of the limit block 17. A detection chamber is provided at the bottom of the cover plate 3. Multiple brightness detectors are installed inside the detection chamber. A sealing gasket is provided at the bottom of the cover plate 3. In this embodiment, the output end of the electric push rod 2 pushes one end of the cover plate 3 to rotate upward. At this time, the limit block 17 and the limit groove 15 cooperate to assist the rotation of the cover plate 3, so as to facilitate the opening of the top of the main body 1 and thus facilitate the access of the LED backlight. The cylindrical limit block 17 cooperates with the bearing to reduce the friction between the limit block 17 and the limit groove 15. The sealing gasket can play the purpose of dust prevention and at the same time keep the inside of the clamping cavity 9 dark, so that the brightness detector can detect more accurately. The working principle and usage procedure of this device are as follows: S1: Simultaneously start the two electric push rods 2. The electric push rods 2 drive the cover plate 3 to move upward. Then, manually pull the pull rod 4 to move it outward. At this time, the pull rod 4 drives the transmission plate 11 to move to one side. At this time, the transmission plate 11 drives the sliding block 8 to move outward through the transmission rod 12. Under the action of the sliding block 8 and the sliding groove 5, the two clamping plate assemblies 7 are separated. S2: Then, put the qualified LED backlight into the clamping cavity 9 and connect the power supply to the LED backlight. Then, the electric push rod 2 drives the cover plate 3 to seal. At this time, release the pull rod 4. Under the action of the return spring 10, the transmission plate 11 quickly returns to its original position. The transmission rod 12 drives the clamping plate assembly 7 to move inward to clamp and fix the LED backlight. Then, multiple brightness detectors are activated to test the LED backlight, and the data from the multiple brightness detectors are recorded and transmitted to the computer. S3: Repeat S1 to take out the qualified LED backlight. Then repeat S1 to put the untested LED backlight into the clamping cavity 9 and activate the brightness detector to test the brightness of the LED backlight. The test data is transmitted to the computer. S4: Compare the test data in S3 with the test data in S2. When the difference is within a certain range, the quality is qualified. When the difference exceeds the range, the quality is unqualified.

[0019] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. An LED backlight brightness detection device, comprising a main body (1), characterized in that: The main body (1) has two clamping plate assemblies (7) installed inside for clamping the LED backlight; The clamping cavity (9) located at the top of the main body (1) is used to store the LED backlight; The power component located inside the main body (1) is used to drive the two card plate assemblies (7) to move relative to each other; The card plate assembly (7) includes multiple sets of rotating blocks (701). A rotating groove (703) is provided at the bottom end of one side of each set of rotating blocks (701). A rotating column (704) that cooperates with the rotating groove (703) is fixed at the bottom end of one side of each set of rotating blocks (701). A slot (705) is provided inside the rotating column (704) and on one side of the rotating block (701). A plug (706) is installed inside the slot (705). A rotating knob (702) is fixed at the top of the plug (706). The cross-section of the plug (706) and the slot (705) is dodecagonal.

2. The LED backlight brightness detection device according to claim 1, characterized in that: The power assembly includes a bottom sliding groove (5) located inside the clamping cavity (9). The bottom of the main body (1) is provided with an installation cavity (6). A transmission disk (11) is slidably connected inside the installation cavity (6). A transmission rod (12) is rotatably connected to both sides of the transmission disk (11). A sliding block (8) that cooperates with the sliding groove (5) is rotatably connected to the end of the transmission rod (12).

3. The LED backlight brightness detection device according to claim 2, characterized in that: The bottom of one set of rotating blocks (701) is fixedly connected to the sliding block (8), and the outer side of multiple sets of rotating blocks (701) is wrapped with a rubber sleeve.

4. The LED backlight brightness detection device according to claim 2, characterized in that: The power assembly also includes a reset component for resetting the transmission disc (11). The reset component includes a pull rod (4) located at one end of the transmission disc (11). The pull rod (4) extends through to the outside of the main body (1) and is slidably connected to the main body (1). A reset spring (10) is installed at the other end of the transmission disc (11). The end of the reset spring (10) is connected to the inner wall of the mounting cavity (6).

5. The LED backlight brightness detection device according to claim 4, characterized in that: The power assembly also includes a stabilizer for limiting the movement of the transmission disk (11). The stabilizer includes a groove (14) opened at the bottom of the mounting cavity (6). The bottom of the transmission disk (11) is fixed with a slider (13) that cooperates with the groove (14).

6. The LED backlight brightness detection device according to claim 1, characterized in that: An electric push rod (2) is installed at the middle position on both sides of the main body (1). The output end of the electric push rod (2) is connected to a mounting plate (16). A limit block (17) is fixed on one side of the mounting plate (16).

7. The LED backlight brightness detection device according to claim 1, characterized in that: The top of the main body (1) is rotatably connected to a cover plate (3). Both ends of the cover plate (3) are provided with limiting grooves (15) that cooperate with the limiting block (17). The limiting block (17) is cylindrical, and a bearing is rotatably connected to the outer side of the limiting block (17).

8. The LED backlight brightness detection device according to claim 7, characterized in that: The bottom of the cover plate (3) is provided with a detection chamber, and multiple brightness detectors are installed inside the detection chamber. A sealing gasket is provided at the bottom of the cover plate (3).

9. A method for detecting the brightness of an LED backlight, based on the LED backlight brightness detection device and method described in claims 1-8, characterized in that: The specific detection method is as follows; S1: Simultaneously start two electric push rods (2), the electric push rods (2) drive the cover plate (3) to move upward, and then manually pull the pull rod (4) to move outward. At this time, the pull rod (4) drives the transmission plate (11) to move to one side. At this time, the transmission plate (11) drives the sliding block (8) to move outward through the transmission rod (12). Under the action of the sliding block (8) and the sliding groove (5) working together, the two card plate assemblies (7) are separated. S2: Then, put the qualified LED backlight into the clamping cavity (9) and connect the power supply to the LED backlight. Then, the electric push rod (2) drives the cover plate (3) to seal. At this time, the pull rod (4) is released. Under the action of the reset spring (10), the transmission plate (11) quickly resets. The transmission plate (11) drives the clamping plate assembly (7) to move inward through the transmission rod (12) to clamp and fix the LED backlight. Then, multiple brightness detectors are started to test the LED backlight and the data of multiple brightness detectors are recorded and transmitted into the computer. S3: Repeat S1 to take out the qualified LED backlight, then repeat S1 to put the untested LED backlight into the clamping cavity (9), and start the brightness detector to test the brightness of the LED backlight, and transmit the detected data to the computer. S4: Compare the test data in S3 with the test data in S2. When the difference is within a certain range, the quality is qualified; when the difference exceeds the range, the quality is unqualified.

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