Jig for AOI detection of backlight module of display panel and detection method

Abstract

The invention relates to a jig for AOI detection of a backlight module of a display panel and a detection method, the jig comprises a bottom plate and a cover plate, the bottom plate is provided with a groove, the bottom surface of the groove is also provided with an annular groove annularly arranged along the circumferential direction of the backlight module to be detected, and the backlight module to be detected in the groove is at least partially suspended in the annular groove. A first sealing piece is arranged between the cover plate and the bottom plate, a second sealing piece is arranged between the cover plate and the upper surface of the backlight module to be detected located in the groove, the annular groove is matched with the first sealing piece and the second sealing piece to form a sealing cavity, and a vacuumizing device communicated with the sealing cavity is arranged on the bottom plate and / or the cover plate. According to the invention, the annular sealing cavity is designed on the bottom plate, so that the vacuum pressure value requirement of vacuumizing 5N and above is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of display panels, and particularly to a jig for AOI detection of a backlight module of a display panel. Background Art

[0002] One of the key components of liquid crystal display products is the backlight module, whose function is to provide sufficient brightness and uniform light source to ensure normal display of images. In the final manufacturing stage of the backlight module, optical property detection is required to detect whether there are defects such as dark spots, shadows, bright spots, etc., so as to judge whether the product is qualified and ensure product quality. At present, manual detection methods are usually adopted, but this method has problems such as high labor intensity, low efficiency, great influence by human judgment, and difficulty in unifying detection standards, and cannot ensure product quality.

[0003] Recently, a technical solution has emerged, which designs a vacuum pressing device. The device includes an upper pressing plate, a lower pressing plate and a transparent sealing film. The transparent sealing film is installed between the upper pressing plate and the lower pressing plate, and a vacuum suction port is provided on the lower pressing plate. The main advantage of adopting this technical solution is that the vacuum suction port can suck the backlight module, so that the transparent sealing film fits on the surface of the backlight module, thereby effectively showing defects such as bubbles, foreign matters, white dots, and white patches in the backlight module.

[0004] However, this technical solution has a defect, that is, if there is only a vacuum suction port on the lower pressing plate, when the jig evacuates the air and the four sides separate, the four sides respectively press the four sides of the liquid crystal panel backlight module during AOI detection. Since there are gaps at the joints of the four sides, the requirement of extracting a vacuum pressure value of 5N or more cannot be met. Therefore, it is urgent to develop a jig for AOI detection of a backlight module of a display panel to solve the above technical problems. Summary of the Invention

[0005] The embodiment of the present application provides a jig for AOI detection of a backlight module of a display panel and a display panel detection device, which ensures the requirement of a vacuum pressure value of 5N or more by designing an annular sealing chamber on the bottom plate.

[0006] An embodiment of the present application provides a jig for AOI detection of a backlight module of a display panel, including a bottom plate and a cover plate. The bottom plate is used to place the backlight module to be inspected, and the cover plate is used to buckle the bottom plate. The cover plate has a hollow area, and the hollow area is used to expose the light-emitting area of the backlight module to be inspected; an annular groove is arranged circumferentially along the periphery of the backlight module to be inspected on the outer edge side of the bottom plate. A first seal is provided between the cover plate and the bottom plate near the outer edge side of the cover plate, and a second seal is provided between the cover plate and the upper surface of the backlight module to be inspected. The annular groove, the cover plate, the first seal and the second seal cooperate to form a sealed chamber, and at least part of the edge of the backlight module to be inspected is located in the sealed chamber. A vacuum pumping device communicating with the sealed chamber is provided on the bottom plate and / or the cover plate.

[0007] In a preferred embodiment of the present invention, a probe module for conducting the backlight module to be inspected is connected to the bottom plate. The probe module includes a probe lifting mechanism connected to the bottom plate. The piston rod end of the probe lifting mechanism is located in the sealed chamber, and the piston rod end of the probe lifting mechanism is connected with a probe assembly.

[0008] In a preferred embodiment of the present invention, the probe lifting mechanism includes a mounting seat for connecting to the bottom plate and a lifting cylinder connected to the mounting seat. The piston rod end of the lifting cylinder passes through the mounting seat and is located in the sealed chamber. A sealing ring is arranged between the piston rod end and the mounting seat, and the piston rod end is connected with the probe assembly.

[0009] In a preferred embodiment of the present invention, a mounting hole is arranged in the sealed chamber, and a mounting plate is detachably connected in the mounting hole. The probe lifting mechanism is connected to the mounting plate.

[0010] In a preferred embodiment of the present invention, the first seal is a sealing ring. A first annular semi-circular groove is arranged on the bottom plate, and a second annular semi-circular groove is arranged on the cover plate. The shape of the circular groove formed by the combination of the first annular semi-circular groove and the second annular semi-circular groove corresponds to the shape of the sealing ring; the second seal is a gasket, and the gasket is fixedly connected to the cover plate.

[0011] In a preferred embodiment of the present invention, the bottom plate includes a fixing plate and a jig bottom plate. Hollow areas are arranged on both the fixing plate and the jig bottom plate. A flipping assembly is arranged on the fixing plate. The flipping assembly includes a flipping cylinder fixedly connected to the bottom plate and a connecting plate connected to the flipping cylinder. The cover plate is assembled on the connecting plate, and the cover plate is buckled on the bottom plate or flipped open from the buckled state under the drive of the flipping assembly.

[0012] In a preferred embodiment of the present invention, the bottom plate includes a fixing plate and a jig bottom plate, and an auxiliary pressing assembly for loading the cover plate is provided on the fixing plate; the auxiliary pressing assembly includes two pressing cylinders, and a pressing head is connected to the piston rod end of each pressing cylinder.

[0013] In a preferred embodiment of the present invention, a support block for positioning the backlight module to be inspected is provided on the bottom plate, and the position of the support block can be adjusted based on backlight modules of liquid crystal panels with different sizes.

[0014] The present invention also discloses a detection method for a display panel backlight module. The backlight module to be inspected is placed in the groove of the jig, the flipping cylinder drives the jig cover plate to rotate until it fits with the jig bottom plate, the pressing cylinder drives the pressing head to load the cover plate, ensuring the sealing of the sealed chamber. When the vacuum pumping device works to pump vacuum for the sealed chamber until the negative pressure in the sealed chamber ≥ M Newton, where M is a calibrated value, the probe module is turned on to light up the backlight module to be inspected, and the AOI camera takes pictures for detection. It should be noted that M here is a numerical value, which is selected according to the needs of different products. In some implementation manners, M can be, for example, 5, 10, 12 or other numerical values, and the present application does not limit this.

[0015] In a preferred embodiment of the present invention, a probe module for conducting the backlight module to be inspected is connected to the bottom plate. The probe module includes a probe lifting mechanism connected to the bottom plate. The piston rod end of the probe lifting mechanism is located in the sealed chamber, and a probe assembly is connected to the piston rod end of the probe lifting mechanism; an installation hole is provided in the sealed chamber, and a mounting plate is detachably connected in the installation hole, and the probe lifting mechanism is connected to the mounting plate; a support block for positioning the backlight module to be inspected is provided on the bottom plate; when detecting backlight modules to be inspected with different sizes, the steps of switching the jig include: replacing the mounting plate of the probe module; replacing the probe assembly of the probe module; adjusting the installation position of the probe lifting mechanism; adjusting the position of the support block of the backlight module.

[0016] The beneficial effects brought by the technical solution provided by the present application include: by introducing a sealed chamber, the present invention realizes an increase in negative pressure during the vacuum pumping process in the AOI detection of the backlight module, so that it can reach 5N and above, effectively improving the AOI detection accuracy and reducing the time for adjusting the jig when replacing different products;

[0017] Furthermore, the first sealing member of the present invention is a sealing ring. A first annular semi-circular groove is provided on the bottom plate, and a second annular semi-circular groove is provided on the cover plate. The shape of the circular groove formed by the combination of the first annular semi-circular groove and the second annular semi-circular groove corresponds to the shape of the sealing ring; the second sealing member is a gasket, and the gasket is fixedly connected to the cover plate; this structural design has the advantages of good sealing performance, simple structure, and convenient replacement;

[0018] Furthermore, an auxiliary pressing assembly for loading the cover plate is provided on the bottom plate of the present invention. The auxiliary pressing assembly includes a pressing cylinder and a pressing head connected to the pressing cylinder; this structural design is more conducive to improving the sealing performance of the sealing chamber.

[0019] Furthermore, a support block for positioning the backlight module to be inspected is provided on the bottom plate of the present invention; a probe module for conducting the backlight module to be inspected is connected to the bottom plate, a first observation hole is provided on the cover plate, a second observation hole communicating with the groove is provided on the bottom plate, and an optical glass is provided in the second observation hole; this structural design has the advantage of high integration. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 Schematic diagram of a jig for AOI inspection of a backlight module of a display panel according to an embodiment of the present application;

[0022] Figure 2 Exploded view (hiding the frame) of a jig for AOI inspection of a backlight module of a display panel according to an embodiment of the present application;

[0023] Figure 3 Schematic diagram of the sealing chamber of a jig for AOI inspection of a backlight module of a display panel according to an embodiment of the present application;

[0024] Figure 4 Schematic diagram of the sealing chamber of a jig for AOI inspection of a backlight module of a display panel according to an embodiment of the present application;

[0025] Figure 5 Schematic diagram of the frame of a jig for AOI inspection of a backlight module of a display panel according to an embodiment of the present application;

[0026] Figure 6 Schematic diagram of the installation position of the probe module of a jig for AOI inspection of a backlight module of a display panel according to an embodiment of the present application;

[0027] Figure 7 Schematic diagram of the installation position of the probe lifting mechanism of a jig for AOI inspection of a backlight module of a display panel according to an embodiment of the present application;

[0028] Figure 8 Schematic diagram of the probe lifting mechanism of a jig for AOI inspection of a backlight module of a display panel according to an embodiment of the present application;

[0029] In the figure: 1 - bottom plate, 2 - cover plate, 3 - backlight module to be inspected, 4 - groove, 5 - annular groove, 6 - first seal, 7 - second seal, 8 - sealed chamber, 9 - vacuum pumping device, 10 - flipping cylinder, 11 - connecting plate, 12 - probe module, 13 - support block, 14 - pressing cylinder, 15 - pressing head, 16 - optical glass, 17 - fixed bottom plate, 18 - probe lifting mechanism, 19 - frame. Specific implementation mode

[0030] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0031] Embodiment 1

[0032] As Figures 1-5 shown, a fixture for AOI inspection of a backlight module of a display panel according to the present invention includes a bottom plate 1 and a cover plate 2 connected to the bottom plate 1. A groove 4 for placing the backlight module 3 to be inspected is provided on the bottom plate 1. An annular groove 5 arranged circumferentially along the backlight module 3 to be inspected is further machined on the bottom surface of the groove 4. At least a part of the backlight module 3 to be inspected located in the groove 4 is suspended in the annular groove 5. A first seal 6 is provided between the cover plate 2 and the bottom plate 1, and a second seal 7 is provided between the cover plate 2 and the upper surface of the backlight module 3 located in the groove 4. The annular groove 5 forms a sealed chamber 8 in cooperation with the first seal 6 and the second seal 7. A vacuum pumping device 9 communicating with the sealed chamber 8 is provided on the bottom plate 1 and / or the cover plate 2. The groove 4 and the annular groove 5 of the present invention can be understood as being formed by machining in two steps. First, the groove 4 is machined, and the shape of the groove 4 matches the shape of the backlight module 3 to be inspected. Then, the annular groove 5 is machined on the bottom surface of the groove 4, and the annular groove 5 is located outside the groove 4.

[0033] As Figures 6-8As shown in the figure, a probe module 12 for conducting the backlight module 3 to be detected is connected to the bottom plate 1 of the present invention. The probe module 12 includes a probe lifting mechanism 18 arranged to be connected to the bottom plate 1. The piston rod end of the probe lifting mechanism 18 is located in the sealed chamber 8, and the piston rod end of the probe lifting mechanism 18 is connected to a probe assembly 18.1. The probe lifting mechanism 18 includes a mounting seat 18.2 for connecting to the bottom plate 1 and a lifting cylinder 18.3 connected to the mounting seat 18.2. The piston rod end of the lifting cylinder 18.3 passes through the mounting seat 18.2 and is located in the sealed chamber 8. A sealing ring 18.4 is arranged between the piston rod end and the mounting seat 18.2, and the piston rod end is connected to the probe assembly 18.1. An installation hole is arranged in the sealed chamber 8, and a mounting plate 18.5 is detachably connected in the installation hole. The probe lifting mechanism 18 is connected to the mounting plate 18.5.

[0034] Embodiment 2

[0035] As Figures 1-5 As shown in the figure, a jig for AOI detection of a backlight module of a display panel of the present invention includes a bottom plate 1 and a cover plate 2 connected to the bottom plate 1. A groove 4 for placing the backlight module 3 to be detected is arranged on the bottom plate 1. A ring groove 5 arranged in a circumferential ring shape along the backlight module 3 to be detected is further machined on the bottom surface of the groove 4. At least a part of the backlight module 3 located in the groove 4 is suspended in the ring groove 5. A first sealing member 6 is arranged between the cover plate 2 and the bottom plate 1, and a second sealing member 7 is arranged between the cover plate 2 and the upper surface of the backlight module 3 located in the groove 4. The ring groove 5 forms a sealed chamber 8 in cooperation with the first sealing member 6 and the second sealing member 7. A vacuum pumping device 9 communicating with the sealed chamber 8 is arranged on the bottom plate 1 and / or the cover plate 2. The first sealing member 6 is a sealing ring. A first annular semi-circular groove is arranged on the bottom plate 1, and a second annular semi-circular groove is arranged on the cover plate 2. The shape of the circular groove formed by the splicing of the first annular semi-circular groove and the second annular semi-circular groove corresponds to the shape of the sealing ring. The second sealing member 7 is a gasket, and the gasket is fixedly connected to the cover plate 2.

[0036] Embodiment 3

[0037] As Figures 1-5As shown in the figure, a fixture for AOI detection of a backlight module of a display panel according to the present invention includes a bottom plate 1 and a cover plate 2 connected to the bottom plate 1. A groove 4 for placing the backlight module 3 to be inspected is provided on the bottom plate 1. An annular groove 5 is further machined on the bottom surface of the groove 4 and is arranged in a circumferential ring shape along the backlight module 3 to be inspected. At least a part of the backlight module 3 located in the groove 4 is suspended in the annular groove 5. A first seal 6 is provided between the cover plate 2 and the bottom plate 1, and a second seal 7 is provided between the cover plate 2 and the upper surface of the backlight module 3 located in the groove 4. The annular groove 5, in cooperation with the first seal 6 and the second seal 7, forms a sealed chamber 8. A vacuum pumping device 9 communicating with the sealed chamber 8 is provided on the bottom plate 1 and / or the cover plate 2. The first seal 6 is an O-ring. A first annular semi-circular groove is provided on the bottom plate 1, and a second annular semi-circular groove is provided on the cover plate 2. The shape of the circular groove formed by the combination of the first annular semi-circular groove and the second annular semi-circular groove corresponds to the shape of the O-ring. The second seal 7 is a gasket, and the gasket is fixedly connected to the cover plate 2. A flipping assembly is provided on the bottom plate 1, and the rotating end of the flipping assembly is connected to the cover plate 2. The flipping assembly includes a flipping cylinder 10 fixedly connected to the bottom plate 1 and a connecting plate 11 connected to the flipping cylinder 10. The cover plate 2 is connected to the connecting plate 11. An auxiliary pressing assembly for loading the cover plate is provided on the bottom plate 1. The auxiliary pressing assembly includes a pressing cylinder 14 and a pressing head 15 connected to the pressing cylinder 14.

[0038] Embodiment 4

[0039] As Figures 1-5As shown in the figure, a fixture for AOI detection of a backlight module of a display panel according to the present invention includes a bottom plate 1 and a cover plate 2 connected to the bottom plate 1. A groove 4 for placing the backlight module 3 to be inspected is provided on the bottom plate 1. A ring groove 5 is also machined on the bottom surface of the groove 4 and is arranged in a circumferential ring shape along the circumference of the backlight module 3 to be inspected. At least a part of the backlight module 3 located in the groove 4 is suspended in the ring groove 5. A first seal 6 is provided between the cover plate 2 and the bottom plate 1, and a second seal 7 is provided between the cover plate 2 and the upper surface of the backlight module 3 located in the groove 4. The ring groove 5, in cooperation with the first seal 6 and the second seal 7, forms a sealed chamber 8. A vacuum pumping device 9 communicating with the sealed chamber 8 is provided on the bottom plate 1 and / or the cover plate 2. The first seal 6 is an O-ring. A first annular semi-circular groove is provided on the bottom plate 1, and a second annular semi-circular groove is provided on the cover plate 2. The shape of the circular groove formed by the splicing of the first annular semi-circular groove and the second annular semi-circular groove corresponds to the shape of the O-ring. The second seal 7 is a gasket, and the gasket is fixedly connected to the cover plate 2. A flipping assembly is provided on the bottom plate 1, and the rotating end of the flipping assembly is connected to the cover plate 2. The flipping assembly includes a flipping cylinder 10 fixedly connected to the bottom plate 1 and a connecting plate 11 connected to the flipping cylinder 10. The cover plate 2 is connected to the connecting plate 11. An auxiliary pressing assembly for loading the cover plate is provided on the bottom plate 1. The auxiliary pressing assembly includes a pressing cylinder 14 and a pressing head 15 connected to the pressing cylinder 14. A support block 13 for positioning the backlight module 3 to be inspected is provided on the bottom plate 1.

[0040] Embodiment 5

[0041] As Figures 1-5As shown in the figure, a fixture for AOI detection of a backlight module of a display panel according to the present invention includes a bottom plate 1 and a cover plate 2 connected to the bottom plate 1. A groove 4 for placing the backlight module 3 to be inspected is provided on the bottom plate 1. An annular groove 5 is also machined on the bottom surface of the groove 4 and is arranged annularly along the circumference of the backlight module 3 to be inspected. At least a part of the backlight module 3 located in the groove 4 is suspended in the annular groove 5. A first seal 6 is provided between the cover plate 2 and the bottom plate 1, and a second seal 7 is provided between the cover plate 2 and the upper surface of the backlight module 3 located in the groove 4. The annular groove 5 forms a sealed chamber 8 in cooperation with the first seal 6 and the second seal 7. A vacuum pumping device 9 communicating with the sealed chamber 8 is provided on the bottom plate 1 and / or the cover plate 2. The first seal 6 is a sealing ring. A first annular semi-circular groove is provided on the bottom plate 1, and a second annular semi-circular groove is provided on the cover plate 2. The shape of the circular groove formed by the splicing of the first annular semi-circular groove and the second annular semi-circular groove corresponds to the shape of the sealing ring. The second seal 7 is a gasket, and the gasket is fixedly connected to the cover plate 2. A flipping assembly is provided on the bottom plate 1, and the rotating end of the flipping assembly is connected to the cover plate 2. The flipping assembly includes a flipping cylinder 10 fixedly connected to the bottom plate 1 and a connecting plate 11 connected to the flipping cylinder 10, and the cover plate 2 is connected to the connecting plate 11. An auxiliary pressing assembly for loading the cover plate is provided on the bottom plate 1. C includes a pressing cylinder 14 and a pressing head 15 connected to the pressing cylinder 14. A support block 13 for positioning the backlight module 3 to be inspected is provided on the bottom plate 1. A probe module 12 for conducting the backlight module 3 to be inspected is connected to the bottom plate 1. A first observation hole is provided on the cover plate 2, a second observation hole communicating with the groove 4 is provided on the bottom plate 1, and an optical glass 16 is provided in the second observation hole.

[0042] Example 6

[0043] A fixture for AOI detection of a backlight module of a display panel according to the present invention is similar to the foregoing embodiments, but an optical sensor for detecting the backlight module 3 is provided on the bottom plate 1. The optical sensor is located on the side or bottom surface of the groove 4 and is used to detect specific parameters or surface defects of the backlight module 3.

[0044] Example 7

[0045] A fixture for AOI detection of a backlight module of a display panel according to the present invention is similar to the foregoing embodiments, but a heating element or a cooling element for heating or cooling the backlight module 3 to be inspected is provided on the bottom plate 1 and / or the cover plate 2. These elements can adjust the temperature of the backlight module to ensure stability and accuracy during the test.

[0046] Example 8

[0047] A fixture for AOI detection of the backlight module of a display panel according to the present invention is similar to the foregoing embodiments, but a data acquisition device for recording the test data of the backlight module to be inspected is provided on the bottom plate 1 and / or the cover plate 2. The data acquisition device can record various parameters, test results and other relevant information of the backlight module for quality control and production tracking.

[0048] Embodiment 9

[0049] A fixture for AOI detection of the backlight module of a display panel according to the present invention is similar to the foregoing embodiments, and may further include an independent frame 19. The bottom plate 1, the flipping assembly, the bottom plate 1, etc. are connected to the frame 19. This split design is more conducive to the maintenance and replacement of the equipment. It should be noted that the frame 19 and the bottom plate 1 may also be an integral structure, that is, equivalent to only the bottom plate 1.

[0050] These embodiments provide some possible expansions to enhance the functions and performance of the AOI detection fixture for the backlight module of the display panel. The specific implementation can be adjusted and customized according to requirements and application scenarios.

[0051] The AOI detection operation process of the present invention is as follows:

[0052] 1. Manually place the liquid crystal panel backlight module on the liquid crystal panel light-emitting module support block installed on the fixture bottom plate;

[0053] 2. The operator presses the test button;

[0054] 3. The fixture cover flipping cylinder drives the fixture cover to rotate until it rotates and fits with the fixture bottom plate;

[0055] 4. The fixture cover pressing cylinders on both the left and right sides rotate and press down on the fixture cover;

[0056] 5. At this time, the sealing ring and the gasket seal the periphery of the liquid crystal panel backlight module to form a sealed space. The vacuum inlet is connected to the vacuum, and the air in the film gap of the liquid crystal panel backlight module is pumped away;

[0057] 6. When the negative pressure reaches 5N, the probe lifting mechanism drives the probe group to press down on the FPC of the liquid crystal panel light-emitting module, the liquid crystal panel light-emitting module is lit, and the AOI camera takes pictures for detection;

[0058] 7. After the AOI camera finishes taking pictures, the vacuum inlet is disconnected from the vacuum, and at the same time, the fixture cover pressing cylinders rotate and rise;

[0059] 8. Since the sealing environment is destroyed and the negative pressure environment disappears after the fixture cover pressing cylinders are released, at this time, the fixture cover flipping cylinder rotates, and the AOI detection process is completed and the test piece can be taken out.

[0060] The operation process of the fixture for switching backlight module products of liquid crystal panels with different sizes in the present invention is as follows: 1. Replace the fixed bottom plate of the probe group; 2. Replace the probe assembly and adjust the installation position of the probe lifting mechanism; 3. Adjust the position of the support block of the liquid crystal panel light-emitting module.

[0061] In the description of the present application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application. Unless otherwise clearly specified and defined, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0062] It should be noted that in the present application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, the element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0063] The above description is only the specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A fixture for AOI inspection of display panel backlight module, characterized in that: It comprises a bottom plate (1) and a cover plate (2), wherein the bottom plate is used to place a backlight module to be inspected, and the cover plate is used to buckle with the bottom plate, and the cover plate has a hollow area, and the hollow area is used to expose the light-emitting area of ​​the backlight module to be inspected; The outer edge side of the base plate (1) has an annular groove (5) arranged in an annular manner along the circumference of the backlight module (3) to be inspected; a first sealing member (6) is arranged between the cover plate (2) and the base plate (1) near the outer edge side of the cover plate (2); a second sealing member (7) is arranged between the cover plate (2) and the upper surface of the backlight module (3) to be inspected; the annular groove (5), the cover plate, the first sealing member (6) and the second sealing member (7) cooperate to form a sealed chamber (8); the edge of the backlight module (3) to be inspected is at least partially located in the sealed chamber (8); and a vacuum extraction device (9) connected to the sealed chamber (8) is arranged on the base plate (1) and / or the cover plate (2).

2. The fixture for AOI inspection of display panel backlight module according to claim 1, characterized in that: The base plate (1) is connected to a probe module (12) for conducting the backlight module (3) to be inspected. The probe module (12) comprises a probe lifting mechanism (18) connected to the base plate (1). The piston rod end of the probe lifting mechanism (18) is located in the sealed chamber (8). The piston rod end of the probe lifting mechanism (18) is connected to a probe assembly (18.1).

3. The fixture for AOI inspection of display panel backlight module according to claim 2, characterized in that: The probe lifting mechanism (18) comprises a mounting seat (18.2) for connecting to a base plate (1), and a lifting cylinder (18.3) connected to the mounting seat (18.2); a piston rod end of the lifting cylinder (18.3) passes through the mounting seat (18.2) and is located in the sealed chamber (8); a sealing ring (18.4) is provided between the piston rod end and the mounting seat (18.2); and the piston rod end is connected to the probe assembly (18.1).

4. The fixture for AOI inspection of display panel backlight module according to claim 2, characterized in that: A mounting hole is provided in the sealed chamber (8), a mounting plate (18.5) is detachably connected to the mounting hole, and the probe lifting mechanism (18) is connected to the mounting plate (18.5).

5. The fixture for AOI inspection of display panel backlight module according to claim 1, characterized in that: The first sealing member (6) is a sealing ring, the bottom plate (1) is provided with a first annular semicircular groove, the cover plate (2) is provided with a second annular semicircular groove, the shape of the circular groove formed by the first annular semicircular groove and the second annular semicircular groove being combined to correspond to the shape of the sealing ring; the second sealing member (7) is a sealing gasket, and the sealing gasket is fixedly connected to the cover plate (2).

6. The fixture for AOI inspection of display panel backlight module according to claim 1, characterized in that: The base plate (1) comprises a fixed plate and a fixture base plate, both the fixed plate and the fixture base plate are provided with hollow areas, the fixed plate is provided with a flip assembly, the flip assembly comprises a flip cylinder (10) fixedly connected to the base plate (1) and a connecting plate (11) connected to the flip cylinder (10), the cover plate (2) is assembled on the connecting plate (11), and the cover plate is buckled on the base plate or flipped open from a buckled state under the drive of the flip assembly.

7. The fixture for AOI inspection of display panel backlight module according to claim 1, characterized in that: The base plate (1) comprises a fixed plate and a fixture base plate, and an auxiliary clamping assembly for loading the cover plate is arranged on the fixed plate; the auxiliary clamping assembly comprises two clamping cylinders (14), and a pressure head (15) is connected to the piston rod end of each clamping cylinder (14).

8. The fixture for AOI inspection of display panel backlight module according to claim 1, characterized in that: The bottom plate (1) is provided with a support block (13) for positioning the backlight module (3) to be inspected, and the position of the support block (13) can be adjusted based on liquid crystal panel backlight modules of different sizes.

9. A method for detecting a display panel backlight module, characterized in that: The backlight module (3) to be inspected is placed in the groove (4) of the jig as described in any one of claims 1 to 8, the turning cylinder (10) drives the jig cover (2) to rotate until it fits with the jig bottom plate (1), the pressing cylinder (14) drives the pressure head (15) to load the cover (2) to ensure the sealing of the sealed chamber (8), the vacuum device operates to evacuate the sealed chamber (8) until the negative pressure in the sealed chamber (8) is ≥M Newtons, M is the calibration value, the probe module (12) is turned on to light up the backlight module (3) to be inspected, and the AOI camera takes pictures for detection.

10. The detection method for a display panel backlight module according to claim 9, characterized in that: A probe module (12) for conducting the backlight module (3) to be inspected is connected to the bottom plate (1), the probe module (12) comprising a probe lifting mechanism (18) connected to the bottom plate (1), a piston rod end of the probe lifting mechanism (18) being located in the sealed chamber (8), and a probe assembly (18.1) being connected to the piston rod end of the probe lifting mechanism (18); The sealed chamber (8) is provided with a mounting hole, a mounting plate (18.5) is detachably connected to the mounting hole, and the mounting plate (18.5) is connected to the probe lifting mechanism (18); the bottom plate (1) is provided with a support block (13) for positioning the backlight module (3) to be inspected; When testing backlight modules (3) of different sizes to be tested, the steps of switching the jig include: Replace the mounting plate (18.5) of the probe module (12); replace the probe assembly (18.1) of the probe module (12); adjust the mounting position of the probe lifting mechanism (18); and adjust the position of the support block (13) of the backlight module (3).

Images