CN114062386B - Image acquisition equipment for AOI (automatic optical inspection) of backlight plate - Google Patents

Abstract

The invention discloses image acquisition equipment for AOI (automated optical inspection) of a backlight plate, which comprises a body box, wherein two first rotating rods are rotatably arranged on the inner wall of the body box close to the bottom through a pin shaft, an assembling mechanism for fixing the backlight plate is connected between the two first rotating rods, a second acquisition head for acquiring the backlight plate at different deflection angles is fixed on the inner wall of the body box close to the top, a movable block is fixedly connected to the side wall of a chain, the movable block slides in a limiting manner in a groove, the groove is formed in the first rotating rods, and a motor for rotating one chain wheel is fixedly arranged on the outer wall of the body box. According to the invention, through the arrangement of the second collecting head, the image collection can be carried out when the first rotating rod is positioned at different deflection angles, and the existence of objective factors such as light reflection and the like during backlight plate detection is effectively avoided, so that the detection accuracy is improved.

Description

An image acquisition device for AOI detection of backlight

technical field

The invention relates to the technical field of backlight panel detection, in particular to an image acquisition device used for backlight panel AOI detection.

Background technique

The backlight is a light source device used to ensure that the back of the liquid crystal display emits light. Its function is to supply a light source with sufficient brightness and uniform distribution, so that it can display images normally. Feature detection, detect whether there are defects such as dark spots, shadows, bright spots, etc., to judge whether the product is qualified or not, to ensure product quality, the existing image acquisition equipment for AOI detection of backlight panels, during the detection process, the backlight panel itself is relatively fixed, due to reflections The existence of objective factors such as these may affect the detection accuracy.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an image acquisition device for AOI detection of a backlight panel. By setting the second acquisition head, images can be acquired when the first rotating rod is located at different deflection angles, which effectively avoids the need for backlight panel detection. The existence of objective factors such as reflection improves the detection accuracy and solves the problems in the background technology.

In order to achieve the above object, the present invention provides the following technical solution: an image acquisition device for AOI detection of a backlight panel, comprising a body box, and the inner wall of the body box close to the bottom is rotated and installed with two first rotating rods through pin shafts, An assembly mechanism for fixing the backlight panel is connected between the two first rotating rods, the inner wall of the main body box is connected with two sets of driving mechanisms for angular deflection of the first rotating rod, and the inner wall of the main body box is close to the top A second collecting head is fixed for collecting when the backlight plate is at different deflection angles;

Each group of the drive mechanism includes three sprockets, the three sprockets rotate on the inner wall of the main body box, and the sprockets are distributed in a triangular shape, and a chain is drivingly engaged between the three sprockets. A movable block is fixedly connected to the side wall of the chain, the movable block is limited and slides inside the groove, the groove is opened on the first rotating rod, and the outer wall of the main body box is fixedly installed to make one of the sprockets rotate. of the motor.

Preferably, the assembling mechanism includes a bottom frame fixed between two first rotating rods, the upper surfaces of the two first rotating rods are respectively connected with pressure plates through hinged second hinge rods, and the two pressure plates A lower pressing frame is fixedly connected between them, a first mounting block is fixed on the top of the movable block, a cross bar is slidably installed on the first mounting block through a through hole, and one end of the cross bar close to the pressing plate is fixedly installed with a first mounting block. Two installation blocks, the second installation block and the pressure plate are slidably connected, and a second spring is connected to the outer wall of the cross bar between the first installation block and the second installation block.

Preferably, the top of the main body box is further provided with a collection mechanism that performs illumination of different colors when the backlight panel is in a horizontal state, the collection mechanism includes an installation box, the installation box is fixedly connected to the top of the main body box, and the installation box The inner top of the box is fixedly installed with a light seat through a fixing piece, the bottom of the light seat is provided with a circular array of light-transmitting holes, and a light plate is slidably installed inside the light-transmitting hole above the light-transmitting hole, and a lower part of the light plate is installed. A plurality of light tubes are fixedly installed on the surface, and the light tubes are arranged in different colors. The outer wall of the light socket is provided with a first collection head whose angle can be adjusted in an annular array. Opposite motion transmission mechanism.

Preferably, the outer wall of the lamp seat is connected with multiple sets of link mechanisms for changing the angle of the first collecting head, each group of the link mechanisms includes a slide rail fixed on the lamp base, and a movable slide rail is slidably installed inside the slide rail. The side wall of the sliding rail is rotatably installed with two second rotating rods, the end of the second rotating rod far from the sliding rail is connected with a connecting shaft, and a second connecting rod is rotated between the connecting shaft and the sliding rail , the first collecting head is fixedly installed between the two second connecting rods through a connecting plate, and a return spring is connected between the movable plate and the sliding rail.

Preferably, the transmission mechanism includes a movable column that slides inside the lamp base, a mounting column is fixedly connected to the bottom of the movable column, and a first hinge rod is hinged between the outer wall of the mounting column and the lamp panel near the bottom, and the The body box is connected with a control mechanism that makes the movable column move up and down.

Preferably, the control mechanism includes a fixing bar, the fixing bar is fixedly installed on the inner wall of the main body box below one of the first rotating rods, a sliding block is slidably installed on the upper surface of the fixing bar, and the sliding block is connected to the fixing bar. A first spring is connected between the bars, the bottom of the movable block is fixedly connected with a block for moving the slider, and the rear side of the slider is fixedly connected with a first connecting rod, and the first connecting rod is far away from the sliding block. One end passes through the through groove and is fixedly connected with a mounting bar, and the top of the mounting bar is connected with a reversing mechanism.

Preferably, the reversing mechanism includes a rectangular plate and a sloping slot opened thereon, the rectangular plate is fixed to the top of the mounting bar through an extension rod, the outer wall of the movable column is fixedly connected to a limit block, and the limit block Slide mounted inside the chute.

Compared with the prior art, the beneficial effects of the present invention are as follows:

1. Through the arrangement of the structure of the present invention, when the chain continues to be driven counterclockwise, the movable block on the chain is driven to the hypotenuse position. Due to the rotational connection of the first rotating rod, the overall angle deflection of the first rotating rod can be realized. , through the setting of the second collection head, the image collection can be performed when the first rotating rod is located at different deflection angles, which effectively avoids the existence of objective factors such as reflection during the detection of the backlight panel, thereby improving the detection accuracy.

2. In the present invention, since the first mounting block is fixed on the top of the movable block, when the movable block moves, the first mounting block is further driven to move, and the second mounting block can be further driven to move due to the elastic force of the second spring. The second mounting block is slidably connected to the pressing plate. When the second mounting block moves to the end close to the pressing plate, the second hinge rod can further realize the downward movement of the pressing plate and the end that is close to the second collecting head. , so that the pressing frame is snapped into the bottom frame, so that the backlight panel can be assembled and fixed before detection. , which can improve the detection range of the backlight.

3. The present invention can realize the separation of the lamp board to both sides through the installation column and the first hinge rod of the annular array on the installation column when the installation column is continuously pressed down. When the lamps of different colors are located above the light-transmitting holes, different illuminations can be performed on the surface of the backlight board. With the first acquisition head arranged in a ring, images of the backlight board can be collected under different colors of light. The adverse effect of the influence of illumination on the detection is avoided, thereby improving the detection accuracy.

4. In the present invention, through the further arrangement of the structure, when the chain completes one cycle of meshing transmission, the movable block returns to the initial position at this time, and the acquisition and detection of the whole process is completed. It is separated from the inside of the bottom frame, so that the backlight plate is in an unlocked state, which is convenient for manual access, thereby further improving work efficiency.

Description of drawings

1 is a schematic diagram of a right-side three-dimensional structure of the present invention;

2 is a left-view three-dimensional structural schematic diagram of the present invention;

Fig. 3 is the side view structure schematic diagram of the present invention;

Fig. 4 is the A-A sectional structure schematic diagram of the present invention;

Fig. 5 is the B-B sectional structure schematic diagram of the present invention;

6 is a schematic diagram of a C-C cross-sectional structure of the present invention;

Fig. 7 is the enlarged structural schematic diagram of D place in Fig. 6 of the present invention;

Fig. 8 is the enlarged structural schematic diagram at E in Fig. 4 of the present invention;

Fig. 9 is the F-F cross-sectional structure schematic diagram of the present invention;

FIG. 10 is a schematic diagram of the H-H cross-sectional structure of the present invention.

In the figure: 1. Main body box; 2. Installation box; 3. Installation strip; 4. Through slot; 5. First connecting rod; 6. Motor; 7. Rectangular plate; 8. Chute; 9. Active column; 10 , lamp seat; 11, the first collection head; 14, the chain; 15, the sprocket; 16, the second collection head; 17, the first rotation rod; 18, the groove; 19, the movable block; 20, the block; 21 , slider; 22, first spring; 23, installation column; 24, first hinge rod; 25, lamp board; 26, movable plate; 28, lamp tube; 29, light-transmitting hole; 30, slide rail; 31, The second connecting rod; 32, the second rotating rod; 33, the first installation block; 34, the second spring; 35, the cross rod; 36, the pressure plate; 37, the second hinge rod; 38, the second installation block; 39, Press down the frame; 40, the bottom frame; 41, the fixing strip.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Please refer to FIG. 1 to FIG. 10 , the present invention provides a technical solution: an image acquisition device for AOI detection of a backlight panel, comprising a main body box 1 . A rotating rod 17, an assembly mechanism for fixing the backlight panel is connected between the two first rotating rods 17, the inner wall of the main body box 1 is connected with two sets of driving mechanisms for angular deflection of the first rotating rod 17, the main body box 1 is close to The inner wall of the top is fixed with a second collection head 16 for collecting the backlight panel at different deflection angles;

Each group of driving mechanisms includes three sprockets 15, the three sprockets 15 rotate on the inner wall of the main body box 1, and the sprockets 15 are distributed in a triangular shape. A movable block 19 is fixedly connected to the wall. The movable block 19 is limited and slid inside the groove 18. The groove 18 is opened on the first rotating rod 17. The outer wall of the main body box 1 is fixedly installed with a motor for rotating one of the sprockets 15. 6.

Through the arrangement of the structure, when the chain 14 continues to be driven counterclockwise, the movable block 19 on the chain 14 is driven to the hypotenuse position. Due to the rotational connection of the first rotating rod 17, the overall angle of the first rotating rod 17 can be realized. Deflection, through the setting of the second acquisition head 16, the image acquisition can be performed when the first rotating rod 17 is located at different deflection angles, which effectively avoids the existence of objective factors such as reflection during backlight detection, thereby improving the detection accuracy.

Further, the assembling mechanism includes a bottom frame 40 fixed between the two first rotating rods 17 , the upper surfaces of the two first rotating rods 17 are respectively connected with a pressure plate 36 through a hinged second hinge rod 37 , and the two pressure plates 36 A lower pressing frame 39 is fixedly connected therebetween, a first mounting block 33 is fixed on the top of the movable block 19, a cross bar 35 is slidably installed on the first mounting block 33 through a through hole, and one end of the cross bar 35 close to the pressing plate 36 is fixedly mounted with a cross bar 35. The second mounting block 38 is slidably connected with the pressing plate 36 , and a second spring 34 is connected to the outer wall of the cross bar 35 between the first mounting block 33 and the second mounting block 38 .

Since the first mounting block 33 is fixed on the top of the movable block 19, when the movable block 19 moves, the first mounting block 33 is further driven to move, and due to the elastic force of the second spring 34, the second mounting block 38 can be further driven to move , due to the sliding connection between the second installation block 38 and the pressure plate 36, when the second installation block 38 moves to the end close to the pressure plate 36, due to the hinged action of the second hinge rod 37, the pressure plate 36 can be further moved downward and forward One end close to the second collection head 16 moves, so that the lower frame 39 is stuck into the bottom frame 40, so that the backlight board can be assembled and fixed before testing. Compaction is convenient to observe whether there is light leakage at the edge of the backlight board, which can improve the detection range of the backlight board.

Further, the top of the main body box 1 is also provided with a collection mechanism that performs illumination of different colors when the backlight panel is in a horizontal state. The collection mechanism includes an installation box 2, and the installation box 2 is fixedly connected to the top of the body box 1. The light socket 10 is fixedly installed on the top through the fixing member, and the bottom of the light socket 10 is provided with a circular array of light-transmitting holes 29. The light board 25 is slidably installed inside the light socket 10 above the light-transmitting holes 29, and the lower surface of the light board 25 is fixed. A plurality of light tubes 28 are installed, and the light tubes 28 are arranged in different colors. The outer wall of the light socket 10 is provided with a first collecting head 11 with an adjustable angle in an annular array. Motion transmission mechanism.

Through the light-transmitting holes 29 and the plurality of lamps 28 arranged, when the lamps 28 of different colors are located above the light-transmitting holes 29, different illuminations can be performed on the surface of the backlight board, and the first collection The head 11 can collect images of the backlight panel under different colors of illumination, so as to avoid the adverse effects of the influence of illumination on the detection, thereby improving the detection accuracy.

Further, the outer wall of the light base 10 is connected with a plurality of sets of link mechanisms for changing the angle of the first collection head 11 , each set of link mechanisms includes a slide rail 30 fixed on the light base 10 , and a movable plate is slidably installed inside the slide rail 30 . 26. Two second rotating rods 32 are rotatably installed on the side wall of the sliding rail 30. One end of the second rotating rod 32 away from the sliding rail 30 is connected with a connecting shaft, and a second connecting rod 31 is rotated between the connecting shaft and the sliding rail 30. , the first collecting head 11 is fixedly installed between the two second connecting rods 31 through the connecting plate, and a return spring is connected between the movable plate 26 and the sliding rail 30 .

After the collection of different illuminations, continue to move the light board 25 so that the light board 25 is in contact with the movable board 26, thereby further driving the movable board 26 to move to the outside. The hinge effect of the first collection head 11 can realize the angle adjustment of the first collection head 11, and through the change of the angle of the first collection head 11, the first collection head 11 can realize the surface collection and detection of the backlight board at different angles, which can further improve the detection quality and range.

Further, the transmission mechanism includes a movable column 9 that slides inside the lamp base 10, a mounting column 23 is fixedly connected to the bottom of the movable column 9, and a first hinge rod 24 is hinged between the outer wall of the mounting column 23 near the bottom and the lamp panel 25. The box 1 is connected with a control mechanism that makes the movable column 9 move up and down.

Through the installation column 23 and the first hinge rods 24 in the annular array, when the movable column 9 drives the installation column 23 to continuously press down, the lamp panel 25 can be separated from both sides.

Further, the control mechanism includes a fixing bar 41 , the fixing bar 41 is fixedly installed on the inner wall of the body box 1 under one of the first rotating rods 17 , the upper surface of the fixing bar 41 is slidably installed with the slider 21 , and the slider 21 and the fixing bar are slidably installed. A first spring 22 is connected between 41, the bottom of the movable block 19 is fixedly connected with a block 20 that makes the slider 21 move, and the rear side of the slider 21 is fixedly connected with a first connecting rod 5, and the first connecting rod 5 is away from the slider. One end of the 21 passes through the through slot 4 and is fixedly connected with a mounting bar 3 , and a reversing mechanism is connected to the top of the mounting bar 3 .

When the chain 14 continues to drive the movable block 19 to slide inside the groove 18, the abutment block 20 at the bottom of the movable block 19 begins to contact the slider 21, thereby driving the slider 21 to move and compress the first spring 22, passing through the slider The movement of 21 can further drive the first connecting rod 5 and the mounting bar 3 on it to move.

Further, the reversing mechanism includes a rectangular plate 7 and an inclined slot 8 provided thereon, the rectangular plate 7 is fixed to the top of the mounting bar 3 through an extension rod, and the outer wall of the movable column 9 is fixedly connected to a limit block, and the limit block is slidably installed on the top of the mounting bar 3. Inside the chute 8.

When the mounting bar 3 moves, the rectangular plate 7 moves to the end away from the motor 6. Due to the arrangement of the chute 8 and the limit block, when the rectangular plate 7 moves, the movable column 9 can be continuously moved downward.

Working principle: When using the image acquisition device for AOI detection of the backlight panel, first place the backlight panel to be detected on the upper surface of the bottom frame 40, and then drive the motor 6 to work, which can drive the sprocket 15 to rotate counterclockwise. Rotate, thereby driving the chain 14 to rotate counterclockwise. As shown in FIG. 4 , when the chain 14 moves, it can further drive the movable block 19 to slide inside the groove 18. At the beginning, since the first mounting block 33 is fixed on the movable block 19 When the movable block 19 moves, it further drives the first mounting block 33 to move. Due to the elastic force of the second spring 34, it can further drive the second mounting block 38 to move. When the second mounting block 38 moves to the end close to the pressing plate 36, due to the hinged action of the second hinge rod 37, the pressing plate 36 can be further moved downward and forward to the end close to the second collecting head 16, thereby The pressing frame 39 is snapped into the bottom frame 40, so that the backlight panel can be assembled and fixed before the inspection. By snapping the pressing frame 39 into the bottom frame 40, it is convenient to compact the backlight panel, and it is convenient to observe whether there is light leakage at the edge of the backlight panel. Case;

Due to the provided second spring 34, when the chain 14 continues to drive the movable block 19 to slide inside the groove 18, the abutment 20 at the bottom of the movable block 19 begins to contact the slider 21, thereby driving the slider 21 to move and compress The first spring 22, through the movement of the slider 21, can further drive the first connecting rod 5 and the mounting bar 3 on it to move, so that the rectangular plate 7 moves to the end away from the motor 6. The setting, when the rectangular plate 7 is moving, can realize the continuous downward movement of the movable column 9;

Through the installation column 23 and the first hinge rods 24 in the annular array, when the installation column 23 is continuously pressed down, the lamp board 25 can be separated from both sides, and the light-transmitting holes 29 are connected to the plurality of lamp tubes 28 provided. , when the lamps 28 of different colors are located above the light-transmitting holes 29, different illuminations can be performed on the surface of the backlight board, and the first collection head 11 arranged in a ring can be used to illuminate the backlight board in different colors. image acquisition under

After the collection of different illuminations, continue to move the light board 25 so that the light board 25 is in contact with the movable board 26, thereby further driving the movable board 26 to move to the outside. The hinge function of the first collection head 11 can realize the angle adjustment of the first collection head 11, and through the change of the angle of the first collection head 11, the first collection head 11 can realize the surface collection and detection of the backlight board at different angles;

When the movable block 19 moves to the horizontal end position of the chain 14, at this time, the collection and detection of the backlight panel in the horizontal state is completed. When the chain 14 continues to drive counterclockwise, the movable block 19 on the chain 14 is driven to the oblique side. Due to the rotational connection of the first rotating rod 17, the overall angular deflection of the first rotating rod 17 can be realized. At this time, through the setting of the second collecting head 16, the first rotating rod 17 can be located at different deflection angles. Image Acquisition;

When the chain 14 completes one rotation of meshing transmission, the movable block 19 returns to its initial position, and the whole process of collection and detection is completed. At this time, the second mounting block 38 drives the pressure plate 36 to return to its original position, so that the lower pressure frame 39 is separated from the bottom frame 40. , so that the backlight panel is in an unlocked state, which is convenient for manual access.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. The utility model provides an image acquisition equipment for board AOI detects in a poor light, includes body case (1), its characterized in that: the inner wall of the body box (1) close to the bottom is rotatably provided with two first rotating rods (17) through a pin shaft, an assembling mechanism for fixing the backlight plate is connected between the two first rotating rods (17), the inner wall of the body box (1) is connected with two groups of driving mechanisms for enabling the first rotating rods (17) to deflect at an angle, and the inner wall of the body box (1) close to the top is fixedly provided with a second collecting head (16) for collecting the backlight plate at different deflection angles;

each group of driving mechanisms comprises three chain wheels (15), the three chain wheels (15) rotate on the inner wall of the body box (1), the chain wheels (15) are distributed in a triangular shape, chains (14) are meshed among the three chain wheels (15) in a transmission mode, movable blocks (19) are fixedly connected to the side walls of the chains (14), the movable blocks (19) slide in the grooves (18) in a limiting mode, the grooves (18) are formed in the first rotating rod (17), and a motor (6) enabling one of the chain wheels (15) to rotate is fixedly installed on the outer wall of the body box (1);

the equipment mechanism is including fixing underframe (40) between two first pivot poles (17), two the upper surface of first pivot pole (17) is connected with clamp plate (36), two through articulated second hinge pole (37) respectively between clamp plate (36) fixedly connected with pushes down frame (39), the top of movable block (19) is fixed with first installation piece (33), there is horizontal pole (35) through-hole slidable mounting on first installation piece (33), the one end fixed mounting that horizontal pole (35) are close to clamp plate (36) has second installation piece (38), sliding connection between second installation piece (38) and clamp plate (36), horizontal pole (35) outer wall connection between first installation piece (33) and second installation piece (38) has second spring (34).

2. The image capturing apparatus for AOI inspection of a backlight as claimed in claim 1, wherein: the top of the body box (1) is also provided with a collecting mechanism for illuminating with different colors when the backlight plate is positioned in a horizontal state, the collecting mechanism comprises an installation box (2), the installation box (2) is fixedly connected with the top of the body box (1), the inner top of the mounting box (2) is fixedly provided with a lamplight seat (10) through a fixing piece, the bottom of the light seat (10) is provided with light holes (29) in an annular array, a lamp panel (25) is slidably arranged in the light seat (10) above the light holes (29), a plurality of lamp tubes (28) are fixedly arranged on the lower surface of the lamp panel (25), the lamp tubes (28) are arranged in different colors, the outer wall of the lamp light seat (10) is annularly arrayed with a first collecting head (11) with adjustable angle, the lamp holder (10) is internally connected with a transmission mechanism which enables the lamp panels (25) to move in the opposite directions or in the opposite directions.

3. The image capturing apparatus for AOI inspection of a backlight as claimed in claim 2, wherein: light seat (10) outer wall connection has the multiunit link mechanism that makes first collection head (11) angle change, every group link mechanism is including fixing slide rail (30) on light seat (10), slide rail (30) inside slidable mounting has fly leaf (26), the lateral wall of slide rail (30) rotates and installs two second dwang (32), the one end that slide rail (30) were kept away from in second dwang (32) is connected with the connecting axle, it has second connecting rod (31) to rotate between connecting axle and slide rail (30), first collection head (11) are through connecting plate fixed mounting between two second connecting rod (31), be connected with reset spring between fly leaf (26) and slide rail (30).

4. The image capturing apparatus for AOI inspection of a backlight as claimed in claim 2, wherein: drive mechanism is including sliding at inside movable post (9) of light seat (10), activity post (9) bottom fixedly connected with erection column (23), it has first articulated mast (24) to articulate between outer wall and lamp plate (25) that erection column (23) are close to the bottom, be connected with the control mechanism who makes movable post (9) up-and-down motion on body case (1).

5. The image capturing apparatus for AOI inspection of a backlight as claimed in claim 4, wherein: control mechanism includes fixed bar (41), fixed bar (41) fixed mounting is on body case (1) inner wall of one of them first rotation pole (17) below, the upper surface slidable mounting of fixed bar (41) has slider (21), be connected with first spring (22) between slider (21) and fixed bar (41), support piece (20) that movable block (19) bottom fixedly connected with made slider (21) motion, the rear side fixedly connected with head rod (5) of slider (21), the one end that slider (21) were kept away from in head rod (5) is passed logical groove (4) and fixedly connected with mounting bar (3), the top of mounting bar (3) is connected with reversing mechanism.

6. The image capturing apparatus for AOI inspection of a backlight as claimed in claim 5, wherein: the reversing mechanism comprises a rectangular plate (7) and a chute (8) formed in the rectangular plate, the rectangular plate (7) is fixed to the top of the mounting bar (3) through an extension rod, a limiting block is fixedly connected to the outer wall of the movable column (9), and the limiting block is slidably mounted inside the chute (8).

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