Lamp box automatic shading device for panel detection

Abstract

The utility model relates to a light box automatic shading device for panel detection, and belongs to the field of liquid crystal panel detection. The shading mechanism comprises a first shading assembly arranged on the first side edge of the frame and a second shading assembly arranged on the second side edge of the frame; the driving mechanism comprises a first cross beam and a second cross beam which are arranged above the backlight source and are respectively connected with the first shading component and the second shading component; and the flexible anti-dazzling screens are respectively mounted on the first cross beam and the second cross beam, and one end of each flexible anti-dazzling screen vertically extends to the surface of the backlight source. The first cross beam and the second cross beam are both provided with the flexible anti-dazzling screens vertically extending to the surface of the backlight source, the flexible anti-dazzling screens can be bent and deformed, and the tail ends of the flexible anti-dazzling screens are attached to the surface of the backlight source to achieve lateral shielding, so that the light leakage influence of a vertical gap between a moving part and the backlight source can be reduced or avoided, the shading effect is guaranteed, and the service life of the backlight source is prolonged. And smooth detection of a panel product is realized.

Description

Technical Field

[0001] This application relates to the field of liquid crystal panel inspection, and in particular to an automatic light-shielding device for a lightbox used in panel inspection. Background Technology

[0002] Currently, in order to improve the versatility and cost-effectiveness of display screen products, the optical characteristics of the display screen need to be tested during the production process. For example, for LCD panels or LCD screens, a light-emitting test light box is usually used instead of the backlight module in the product. The test light box is also called a backlight source, and LED sources are commonly used as the light source in the test light box.

[0003] Among related technologies, the patent with authorization announcement number CN216792619U discloses an LED test light box with a light-shielding structure, which integrates the light-shielding structure with the box body. Its two-way motion mechanism can drive the light-shielding components in the two directions to unfold or retract through the first connecting plate and the second connecting plate respectively, so as to realize automatic light shielding. It is suitable for products of various specifications and sizes, has a wide range of applications, and reduces costs.

[0004] However, the first and second connecting plates, as moving parts, are staggered above the backlight. The vertical gaps between the first and second connecting plates and the backlight will cause lateral light leakage. That is, the light emitted from the shaded area of ​​the backlight will leak through the vertical gap to the unshaded area, resulting in poor light-shielding effect, which will affect the testing of panel products to a certain extent. Summary of the Invention

[0005] In view of the shortcomings or deficiencies mentioned in the background technology, this application provides an automatic light-shielding device for panel inspection. Under the premise of achieving automatic light-shielding, it can reduce the light leakage effect of the vertical gap between the moving parts and the backlight, ensure the light-shielding effect, and realize the smooth inspection of panel products.

[0006] This application provides an automatic light-shielding device for a lightbox used for panel detection, comprising:

[0007] A frame with a backlight;

[0008] A light-shielding mechanism, comprising a first light-shielding component disposed on a first side of the frame, and a second light-shielding component disposed on a second side of the frame;

[0009] The driving mechanism includes a first crossbeam and a second crossbeam disposed above the backlight and respectively connected to the first light-shielding component and the second light-shielding component;

[0010] Flexible light-shielding sheets are respectively installed on the first crossbeam and the second crossbeam, with one end extending vertically to the surface of the backlight.

[0011] In some embodiments, the first crossbeam is located above the second crossbeam, and a side plate for laterally supporting the flexible light-shielding sheet is installed on the first crossbeam. Both ends of the side plate are provided with notches for avoiding the second crossbeam.

[0012] In some embodiments, a light-shielding plate is installed at the end of the side plate away from the first crossbeam, located below the flexible light-shielding sheet and slidingly engaged with the surface of the backlight.

[0013] In some embodiments, a positioning mechanism is also included, which includes a slider that is slidably connected to the first crossbeam and the second crossbeam respectively, and a positioning block mounted on the slider. The positioning block is provided with a positioning groove and a first sensor for detecting whether a panel to be tested is placed in the positioning groove.

[0014] In some embodiments, the slider is provided with a mounting component for adjusting the mounting position of the positioning block. The mounting component includes a first corner bracket connected to the slider and a second corner bracket connected to the first corner bracket. The positioning block is mounted on the second corner bracket. The first corner bracket, the second corner bracket, and the positioning block are all provided with adjustment holes for mating fasteners.

[0015] In some embodiments, the first crossbeam and the second crossbeam are arranged symmetrically, and the driving mechanism further includes a first driving component disposed on the frame and used to drive the first crossbeams on both sides to move closer or further away synchronously, and a second driving component disposed on the frame and used to drive the second crossbeams on both sides to move closer or further away synchronously.

[0016] In some embodiments, the first drive assembly includes a first slide rail disposed on the frame and a first carriage disposed on the first slide rail and connected to the first crossbeam; the second drive assembly includes a second slide rail disposed on the frame and a second carriage disposed on the second slide rail and connected to the second crossbeam.

[0017] In some embodiments, the first drive assembly further includes a pair of drive shafts disposed on the frame and a first synchronous pulley mounted at both ends of each drive shaft. The first synchronous pulleys on the same side are connected by a first synchronous belt, and the first carriage on the same side is connected to the first synchronous belt. The first drive assembly further includes a first drive member for driving the drive shafts to rotate.

[0018] In some embodiments, the second drive assembly further includes two pairs of second synchronous pulleys rotatably mounted on the frame, the second synchronous pulleys on the same side being connected by a second synchronous belt, the second slide on the same side being connected to the second synchronous belt, and the second drive assembly further includes a second drive member for driving the second synchronous pulleys on both sides to rotate synchronously.

[0019] In some embodiments, the first light-blocking component includes a housing mounted on the frame, a motor and a rotating shaft are installed inside the housing, a light-blocking curtain extending out of the housing is wound on the rotating shaft, and the motor drives the rotating shaft to rotate to realize the raising and lowering of the light-blocking curtain; the structure of the second light-blocking component is the same as that of the first light-blocking component.

[0020] The beneficial effects of the technical solution provided in this application include:

[0021] This application provides an automatic light-shielding device for panel detection of a lightbox. Its driving mechanism is provided with a first crossbeam and a second crossbeam. The first crossbeam and the second crossbeam are arranged alternately above the backlight as moving parts, and are used to drive the first light-shielding component and the second light-shielding component to unfold or retract respectively.

[0022] Because flexible light-shielding sheets extending vertically to the backlight surface are installed on both the first and second crossbeams, the flexible light-shielding sheets can be bent and deformed and their ends can fit into the backlight surface to achieve lateral blocking. This can reduce or avoid the light leakage effect of the vertical gap between the moving parts and the backlight, ensure the light-shielding effect, and enable the panel products to be tested smoothly. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;

[0025] Figure 2 This is a partial truncated schematic diagram of the framework of an embodiment of this application;

[0026] Figure 3 This is a schematic diagram of the side plate structure according to an embodiment of this application;

[0027] Figure 4 This is a schematic diagram showing the connection between the side panel and the light-shielding plate in an embodiment of this application;

[0028] Figure 5 This is a schematic diagram showing the connection between the first carriage and the first slide rail in an embodiment of this application;

[0029] Figure 6 This is a schematic diagram showing the connection between the second carriage and the second slide rail in an embodiment of this application;

[0030] Figure 7This is a bottom view of the framework of an embodiment of this application.

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 1. Frame; 2. Backlight; 3. First light-shielding assembly; 4. Second light-shielding assembly; 5. First crossbeam; 6. Second crossbeam; 7. Flexible light-shielding sheet; 8. Side plate; 9. Light-shielding plate; 10. Slider; 11. Positioning block; 12. First corner bracket; 13. Second corner bracket; 14. First slide rail; 15. First carriage; 16. Second slide rail; 17. Second carriage; 18. Drive shaft; 19. First synchronous pulley; 20. First synchronous belt; 21. First driving component; 22. Second synchronous pulley; 23. Second synchronous belt; 24. Second driving component. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] In view of the shortcomings or deficiencies mentioned in the background technology, this application provides an automatic light-shielding device for panel inspection. Under the premise of achieving automatic light-shielding, it can reduce the light leakage effect of the vertical gap between the moving parts and the backlight, ensure the light-shielding effect, and realize the smooth inspection of panel products.

[0035] See Figures 1 to 7 As shown, this application embodiment provides an automatic light-shielding device for panel detection of light boxes, including:

[0036] Frame 1, on which a backlight 2 is installed;

[0037] The light-shielding mechanism includes a first light-shielding component 3 disposed on a first side of the frame 1 and a second light-shielding component 4 disposed on a second side of the frame 1.

[0038] The drive mechanism includes a first crossbeam 5 and a second crossbeam 6, which are disposed above the backlight 2 and connected to the first light-shielding component 3 and the second light-shielding component 4 respectively.

[0039] The flexible light-shielding sheet 7 is installed on the first crossbeam 5 and the second crossbeam 6 respectively, and one end extends vertically to the surface of the backlight 2.

[0040] The automatic light-shielding device in this embodiment of the application has a drive mechanism with a first crossbeam 5 and a second crossbeam 6. The first crossbeam 5 and the second crossbeam 6 are moving parts and are arranged alternately above the backlight 2 to drive the light-shielding curtains in the first light-shielding component 3 and the second light-shielding component 4 to open or close respectively.

[0041] Among them, flexible light-shielding sheets 7 extending vertically to the surface of the backlight 2 are installed on the first crossbeam 5 and the second crossbeam 6. The flexible light-shielding sheets 7 can be bent and deformed and their ends can be attached to the surface of the backlight 2 to achieve lateral blocking, thereby reducing or avoiding the light leakage effect of the vertical gap between the moving parts and the backlight 2, ensuring the light-shielding effect, and enabling the panel products to be tested smoothly.

[0042] It should be noted that, in order to ensure that the first crossbeam 5 and the second crossbeam 6 can move alternately on the surface of the backlight 2, a gap inevitably needs to be reserved between the first crossbeam 5, the second crossbeam 6 and the backlight 2. The flexible light-shielding sheet 7 extends to the surface of the backlight 2, thereby achieving lateral light blocking and ensuring the light-shielding effect.

[0043] For example, the flexible light-shielding sheet 7 can be made of black rubber or black soft plastic and is installed using clamps and fasteners. The first crossbeam 5 is arranged above the second crossbeam 6. The flexible light-shielding sheet 7 installed on the second crossbeam 6 is bent and its end is attached to the surface of the backlight 2 to prevent light leakage from the gap between the second crossbeam 6 and the backlight 2. The flexible light-shielding sheet 7 installed on the first crossbeam 5 is bent and its end is attached to the surface of the backlight 2 and the surface of the second crossbeam 6 to prevent light leakage from the gap between the second crossbeam 6 and the backlight 2.

[0044] In some alternative embodiments: see Figures 1 to 7 As shown, this application embodiment provides an automatic light-shielding device for panel detection of a lightbox. The first crossbeam 5 of the automatic light-shielding device for panel detection is located above the second crossbeam 6. A side plate 8 for laterally supporting the flexible light-shielding sheet 7 is installed on the first crossbeam 5. Both ends of the side plate 8 are provided with notches to avoid the second crossbeam 6.

[0045] In this embodiment, the first crossbeam 5 is positioned above the second crossbeam 6. The vertical gap between the first crossbeam 5 and the backlight 2 is greater than the vertical gap between the second crossbeam 6 and the backlight 2. To prevent the flexible light-shielding sheet 7 on the first crossbeam 5 from curling up directly below it during the reciprocating movement of the first crossbeam 5, a side plate 8 is installed on the first crossbeam 5. The side plate 8 extends towards and is close to the surface of the backlight 2. When the first crossbeam 5 moves the side plate 8, the side plate 8 can laterally support the flexible light-shielding sheet 7, ensuring a light leakage prevention effect.

[0046] In addition, to ensure that the second crossbeam 6 has a certain range of motion, both ends of the side plate 8 are provided with notches to avoid the second crossbeam 6, which allow the second crossbeam 6 to move back and forth within a certain range. For example, in this embodiment, the cross-section of the side plate 8 at the middle position is L-shaped. The side plate 8 is fixedly installed on the first crossbeam 5, and the flexible light-shielding sheet 7 is fixed to the side plate 8 by clamps and fasteners and extends along the surface of the side plate 8.

[0047] It should be noted that in this embodiment, the second crossbeam 6 is located below the first crossbeam 5. The second crossbeam 6 can be attached to the surface of the backlight 2. Due to the small gap, the flexible light-shielding sheet 7 fixed on the second crossbeam 6 by the clamp will not curl up to the bottom of the second crossbeam 6. Therefore, it is not necessary to set a side plate 8 on the second crossbeam 6 to support the flexible light-shielding sheet 7.

[0048] In some alternative embodiments: see Figures 1 to 7 As shown, this application embodiment provides an automatic light shielding device for panel detection of a light box. The side plate 8 of the automatic light shielding device for panel detection is equipped with a light shielding plate 9 located below the flexible light shielding sheet 7 and slidingly engaged with the surface of the backlight 2 at one end away from the first crossbeam 5.

[0049] In this embodiment, a light-shielding plate 9 is installed at the bottom of the side plate 8, which slides in conjunction with the surface of the backlight 2. The flexible light-shielding sheet 7 connected to the first crossbeam 5 is attached to the light-shielding plate 9, which can further improve the lateral light leakage prevention effect. For example, the light-shielding plate 9 can be made of a smooth black rubber sheet or a black plastic sheet. The light-shielding plate 9 can play a separating role, preventing the flexible light-shielding sheet 7 on the first crossbeam 5 from rubbing against the surface of the backlight 2.

[0050] Meanwhile, at the intersection of the first crossbeam 5 and the second crossbeam 6, the light-shielding plate 9, together with the flexible light-shielding sheet 7 on the first crossbeam 5, clamps the flexible light-shielding sheet 7 on the second crossbeam 6 from above and below. That is, at this position, the flexible light-shielding sheet 7 on the second crossbeam 6 is located on the upper surface of the light-shielding plate 9, and the flexible light-shielding sheet 7 on the first crossbeam 5 is located on the upper surface of the flexible light-shielding sheet 7 on the second crossbeam 6, thereby effectively ensuring the light leakage prevention effect at this position.

[0051] In some alternative embodiments: see Figures 1 to 7 As shown, this application embodiment provides an automatic light-shielding device for panel detection of a lightbox. The automatic light-shielding device for panel detection of a lightbox further includes a positioning mechanism. The positioning mechanism includes a slider 10 that is slidably connected to the first crossbeam 5 and the second crossbeam 6 respectively, and a positioning block 11 installed on the slider 10. The positioning block 11 is provided with a positioning groove and a first sensor for detecting whether a panel to be detected is placed in the positioning groove.

[0052] In this embodiment of the application, the slider 10 of the positioning mechanism is slidably connected to the first crossbeam 5 and the second crossbeam 6. When the first crossbeam 5 and the second crossbeam 6 reciprocate, they can always be kept at the intersection of the first crossbeam 5 and the second crossbeam 6. By installing a positioning block 11 on the slider 10, and opening a positioning groove on the positioning block 11, the positioning groove facilitates the placement of the panel to be tested. With the cooperation of the first sensor installed on the positioning block 11, it is possible to detect whether the panel to be tested has been placed in the positioning groove.

[0053] For example, in this embodiment, the positioning block 11 is arranged at the intersection of the light-shielding plate 9 and the flexible light-shielding sheet 7. The two side walls of the positioning groove form right angles to adapt to the panel to be tested. The first sensor can be a proximity sensor and is installed on the side wall of the positioning groove. Furthermore, the side wall of the positioning groove is provided with a guide slope to facilitate the placement of the panel to be tested.

[0054] In some alternative embodiments: see Figures 1 to 7 As shown, this application embodiment provides an automatic light-shielding device for panel detection of a lightbox. The slider 10 of the automatic light-shielding device for panel detection is provided with an installation component for adjusting the installation position of the positioning block 11. The installation component includes a first corner bracket 12 connected to the slider 10 and a second corner bracket 13 connected to the first corner bracket 12. The positioning block 11 is installed on the second corner bracket 13. The first corner bracket 12, the second corner bracket 13 and the positioning block 11 are all provided with adjustment holes for cooperating fasteners.

[0055] In this embodiment, both the first crossbeam 5 and the second crossbeam 6 are provided with slides that cooperate with the slider 10. The first corner bracket 12 is L-shaped, and the second corner bracket 13 is Z-shaped. The adjustment hole on the first corner bracket 12 is a vertically elongated hole, which allows the installation position of the first corner bracket 12 to be adjusted up and down when the fastener is installed to connect the slider 10. The adjustment hole on the second corner bracket 13 is a horizontally elongated hole, which allows the installation position of the second corner bracket 13 to be adjusted forward and backward when the fastener is installed to connect the first corner bracket 12.

[0056] The adjustment hole on the positioning block 11 is an elongated oval hole in the horizontal direction. When fasteners are installed to connect the positioning block 11, the installation position of the positioning block 11 can be adjusted left and right. Since adjusting the installation position of the first corner bracket 12 up and down is equivalent to adjusting the position of the positioning block 11 up and down, and adjusting the installation position of the second corner bracket 13 forward and backward is equivalent to adjusting the position of the positioning block 11 forward and backward, the position of the positioning block 11 can be adjusted in three directions.

[0057] In some alternative embodiments: see Figures 1 to 7As shown, this application embodiment provides an automatic light-shielding device for panel detection of a lightbox. The first crossbeam 5 and the second crossbeam 6 of the automatic light-shielding device for panel detection are both arranged symmetrically. The driving mechanism also includes a first driving component disposed on the frame 1 and used to drive the first crossbeams 5 on both sides to move closer or further away synchronously, and a second driving component disposed on the frame 1 and used to drive the second crossbeams 6 on both sides to move closer or further away synchronously.

[0058] In this embodiment of the application, there are two first crossbeams 5 and two second crossbeams 6. The first crossbeams 5 and the second crossbeams 6 are arranged symmetrically. The first driving component can drive the two first crossbeams 5 to move closer or further away synchronously, and the second driving component can drive the two second crossbeams 6 to move closer or further away synchronously, thereby realizing the adjustment of the light-shielding area, which is convenient for placing the display panel product in the center and is suitable for testing various display panel products of different specifications.

[0059] In some alternative embodiments: see Figures 1 to 7 As shown, this application embodiment provides an automatic light-shielding device for panel detection of a lightbox. The first driving component of the automatic light-shielding device for panel detection includes a first slide rail 14 disposed on a frame 1, and a first carriage 15 disposed on the first slide rail 14 and connected to a first crossbeam 5. The second driving component includes a second slide rail 16 disposed on the frame 1, and a second carriage 17 disposed on the second slide rail 16 and connected to a second crossbeam 6.

[0060] In this embodiment of the application, the first crossbeam 5 is located above the second crossbeam 6. To facilitate the movement of the first crossbeam 5 and the second crossbeam 6 at their respective heights, the frame 1 is equipped with a first slide 15 and a second slide 17 for supporting the first crossbeam 5 and the second crossbeam 6 respectively. The first slide 15 and the second slide 17 are respectively engaged with the first slide rail 14 and the second slide rail 16.

[0061] For example, two pairs of first slide rails 14 are provided, respectively installed on the side walls of the two short sides of the frame 1. First slide brackets 15 are slidably installed on the first slide rails 14, and the two first slide brackets 15 are respectively fixedly connected to the two ends of a first crossbeam 5. Two pairs of second slide rails 16 are provided, respectively installed on the bottom walls of the two long sides of the frame 1. Second slide brackets 17 are slidably installed on the second slide rails 16, and the two first slide brackets 15 are respectively fixedly connected to the two ends of a second crossbeam 6.

[0062] In some alternative embodiments: see Figures 1 to 7As shown, this application embodiment provides an automatic light-shielding device for panel detection of a lightbox. The first drive component of the automatic light-shielding device for panel detection of a lightbox further includes a pair of drive shafts 18 disposed on a frame 1 and a first synchronous wheel 19 installed at both ends of each drive shaft 18. The first synchronous wheel 19 on the same side is connected by a first synchronous belt 20. The first slide 15 on the same side is connected to the first synchronous belt 20. The first drive component further includes a first drive member 21 for driving the drive shafts 18 to rotate.

[0063] In this embodiment, two adjacent first carriages 15 on the same side are fixedly connected to the same first synchronous belt 20 by clamps and fasteners, and the connection positions are staggered in the height direction, so that when the first synchronous belt 20 is running, it can drive the two adjacent first carriages 15 on the same side to move away from or towards each other. The first synchronous belt 20 is driven by two first synchronous pulleys 19 on both sides, and the two first synchronous pulleys 19 are fixedly installed on two drive shafts 18 respectively. The first driving member 21 can drive one of the drive shafts 18 to rotate, so as to realize the operation of the first synchronous belt 20. For example, the first driving member 21 includes a motor, which is installed on the bottom surface of the frame 1. The motor drives one of the drive shafts 18 to rotate forward or backward through pulleys and belts.

[0064] In some alternative embodiments: see Figures 1 to 7 As shown, this application embodiment provides an automatic light-shielding device for panel detection of a lightbox. The second drive component of the automatic light-shielding device for panel detection further includes two pairs of second synchronous wheels 22 rotatably mounted on the frame 1. The second synchronous wheels 22 on the same side are connected by a second synchronous belt 23. The second slide 17 on the same side is connected to the second synchronous belt 23. The second drive component further includes a second drive member 24 for driving the second synchronous wheels 22 on both sides to rotate synchronously.

[0065] In this embodiment, two adjacent second carriages 17 on the same side are fixedly connected to the same second synchronous belt 23 by clamps and fasteners, and the connection positions are staggered in the height direction, so that when the second synchronous belt 23 is running, it can drive the two adjacent second carriages 17 on the same side to move away from or towards each other. The second synchronous belt 23 is driven by two second synchronous pulleys 22 on both sides, which are rotatably mounted on the frame 1. The second driving member 24 can drive the two second synchronous pulleys 22 to rotate synchronously, so as to realize the operation of the first synchronous belt 20. For example, the first driving member 21 includes a motor and a gearbox mounted on the frame, wherein the two second synchronous pulleys 22 are driven by a drive shaft, and the motor is connected to the drive shaft through the gearbox.

[0066] In some alternative embodiments: see Figures 1 to 7As shown, this application embodiment provides an automatic light-shielding device for panel detection of a lightbox. The first light-shielding component 3 of the automatic light-shielding device for panel detection includes a housing mounted on a frame 1. A motor and a rotating shaft are installed inside the housing. A light-shielding curtain that extends out of the housing is wound on the rotating shaft. The motor drives the rotating shaft to rotate to realize the raising and lowering of the light-shielding curtain. The structure of the second light-shielding component 4 is the same as that of the first light-shielding component 3.

[0067] In this embodiment, the light-shielding curtain of the first light-shielding component 3 is fixedly connected to the first crossbeam 5, and the light-shielding curtain of the second light-shielding component 4 is fixedly connected to the second crossbeam 6. When the first crossbeam 5 and the second crossbeam 6 move back and forth above the backlight 2, the motor drives the rotating shaft to rotate in both directions to cooperate with the raising and lowering of the light-shielding curtain, thereby realizing the automatic adjustment of the light-shielding area, which is convenient for placing the display panel product in the center and is suitable for testing various display panel products of different specifications.

[0068] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0069] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0070] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An automatic light-shielding device for a lightbox used for panel inspection, characterized in that, include: A frame (1) with a backlight (2) mounted on it; The light-shielding mechanism includes a first light-shielding component (3) disposed on a first side of the frame (1) and a second light-shielding component (4) disposed on a second side of the frame (1); The driving mechanism includes a first crossbeam (5) and a second crossbeam (6) disposed above the backlight (2) and connected to the first light-shielding component (3) and the second light-shielding component (4) respectively; A flexible light-shielding sheet (7) is installed on the first crossbeam (5) and the second crossbeam (6) respectively, and one end extends vertically to the surface of the backlight (2).

2. The automatic light-shielding device for panel detection as described in claim 1, characterized in that: The first crossbeam (5) is located above the second crossbeam (6). A side plate (8) for laterally supporting the flexible light-shielding sheet (7) is installed on the first crossbeam (5). Both ends of the side plate (8) are provided with notches for avoiding the second crossbeam (6).

3. The automatic light-shielding device for panel detection as described in claim 2, characterized in that: A light-shielding plate (9) is installed at the end of the side plate (8) away from the first crossbeam (5), located below the flexible light-shielding sheet (7) and slidingly engaged with the surface of the backlight (2).

4. The automatic light-shielding device for panel detection as described in claim 1, characterized in that: It also includes a positioning mechanism, which includes a slider (10) that is slidably connected to the first crossbeam (5) and the second crossbeam (6) respectively, and a positioning block (11) installed on the slider (10). The positioning block (11) is provided with a positioning groove and a first sensor for detecting whether the panel to be tested is placed in the positioning groove.

5. The automatic light-shielding device for panel detection of a lightbox as described in claim 4, characterized in that: The slider (10) is provided with an installation component for adjusting the installation position of the positioning block (11). The installation component includes a first corner bracket (12) connected to the slider (10) and a second corner bracket (13) connected to the first corner bracket (12). The positioning block (11) is installed on the second corner bracket (13). The first corner bracket (12), the second corner bracket (13) and the positioning block (11) are all provided with adjustment holes for fasteners.

6. The automatic light-shielding device for panel detection of a lightbox as described in claim 1, characterized in that: The first crossbeam (5) and the second crossbeam (6) are both arranged symmetrically. The driving mechanism also includes a first driving component disposed on the frame (1) and used to drive the first crossbeams (5) on both sides to move closer or further away synchronously, and a second driving component disposed on the frame (1) and used to drive the second crossbeams (6) on both sides to move closer or further away synchronously.

7. The automatic light-shielding device for panel detection of a lightbox as described in claim 6, characterized in that: The first drive assembly includes a first slide rail (14) disposed on the frame (1) and a first carriage (15) disposed on the first slide rail (14) and connected to the first crossbeam (5); the second drive assembly includes a second slide rail (16) disposed on the frame (1) and a second carriage (17) disposed on the second slide rail (16) and connected to the second crossbeam (6).

8. The automatic light-shielding device for panel detection as described in claim 7, characterized in that: The first drive assembly further includes a pair of drive shafts (18) disposed on the frame (1) and a first synchronous pulley (19) installed at both ends of each drive shaft (18). The first synchronous pulley (19) on the same side is connected by a first synchronous belt (20). The first slide (15) on the same side is connected to the first synchronous belt (20). The first drive assembly further includes a first drive member (21) for driving the drive shafts (18) to rotate.

9. The automatic light-shielding device for panel detection of a lightbox as described in claim 7, characterized in that: The second drive assembly further includes two pairs of second synchronous pulleys (22) rotatably mounted on the frame (1). The second synchronous pulleys (22) on the same side are connected by a second synchronous belt (23). The second slide (17) on the same side is connected to the second synchronous belt (23). The second drive assembly further includes a second drive member (24) for driving the second synchronous pulleys (22) on both sides to rotate synchronously.

10. The automatic light-shielding device for panel detection of a lightbox as described in claim 1, characterized in that: The first light-blocking component (3) includes a housing mounted on the frame (1), a motor and a rotating shaft are installed inside the housing, and a light-blocking curtain that extends out of the housing is wound on the rotating shaft. The motor drives the rotating shaft to rotate in order to raise and lower the light-blocking curtain. The structure of the second light-blocking component (4) is the same as that of the first light-blocking component (3).

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