CN211577009U - Large-size liquid crystal display light guide plate defect image acquisition device - Google Patents

Abstract

The utility model provides a large-size liquid crystal screen light guide plate defect image acquisition device, comprising a transmission device, a limit device and an image acquisition device; the transmission device comprises a motor, a guide wheel mounting plate, a belt conveying platform, a main power pulley, Power spindle, coupling, V-belt 1, belt conveying table 2, main power pulley, auxiliary pulley 1, auxiliary pulley 2, main power double pulley and V-belt 2; the limiting device includes two a guide wheel mounting plate, four guide wheels, a horizontal screw moving table two, two horizontal screw moving belt support frames and two bottom horizontal screw moving belt support frames; the image acquisition device includes an area scan camera, Camera bracket 1, light box bracket 1, light box 1, camera bracket 2, line scan camera, light box 2 and light box bracket 2. The high-quality image acquisition device of the light guide plate of the utility model can realize automatic operation and further improve the detection efficiency of the light guide plate.

Description

Large-size LCD screen light guide plate defect image acquisition device

technical field

The utility model relates to a defect image acquisition device of a light guide plate, in particular to a defect image acquisition device of a light guide plate of a large-size liquid crystal screen.

Background technique

The light guide plate is made of optical acrylic/polycarbonate and other plastic sheets. This kind of material has high light transmittance of 92%-95%, small light energy loss, easy processing, chemical stability, and low cost. Therefore, it is widely used in the industry for the production of light guide plates; although the plastic material has good toughness, the surface hardness is relatively fragile compared with metals and inorganic materials, which is prone to scratches and defects, which often affect the picture quality of the backlight.

The defects of the light guide plate mainly include scratches, stains, bright spots, black spots, shadows, yellowing and other defects. The appearance inspection of the traditional light guide plate is mainly carried out manually. The manual inspection has the following disadvantages: 1. Due to subjective judgment and long-term eye fatigue, the inspection quality is unstable; 2. High labor costs; 3. Labor High intensity; 4. Low labor efficiency, etc. To this end, in view of the defects, we propose a light guide plate defect image acquisition device for subsequent algorithm detection.

Therefore, there is a need for improvements to the prior art.

Utility model content

The technical problem to be solved by the utility model is to provide a high-efficiency large-size liquid crystal screen light guide plate defect image acquisition device.

In order to solve the above technical problems, the utility model provides a large-size liquid crystal screen light guide plate defect image acquisition device, including a transmission device, a limit device and an image acquisition device;

The conveying device includes a motor, a guide wheel mounting plate, a belt conveying table one main power pulley, a power spindle, a coupling, a V-belt one, a belt conveying table two main power pulleys, an auxiliary pulley one, and an auxiliary pulley. 2. Main power double pulley and V-belt 2;

The motor is connected with the main power double pulley through a coupling; the main power double pulley is connected with the main power pulley of the second belt conveying platform through the second V belt to form a transmission structure; the second V belt Passing through the second auxiliary pulley, the main power double pulley drives the end conveyor belt for transmission; the second main power pulley of the belt conveying table drives the intermediate conveyor belt for transmission; the main power double pulley is also conveyed through the V-belt one and the belt A main power pulley is connected in rotation to form a transmission structure, a V-belt passes through an auxiliary pulley one, and a main power pulley of the belt conveying table drives the first end conveyor belt to transmit;

The limiting device includes two guide wheel mounting plates, four guide wheels, a transverse screw moving table 2, two transverse screw moving belt support frames and two bottom transverse screw moving belt support frames; two bottom The horizontal screw moving belt support frame is respectively arranged on the left and right sides of the first end conveyor belt, and the horizontal screw moving belt support frame is fixed on the bottom horizontal screw moving belt support frame; the horizontal screw moving belt support frame is provided with Two slidable transverse screw moving tables, each of which is provided with two guide wheels;

The image acquisition device includes an area scan camera, a camera bracket 1, a light box bracket 1, a light box 1, a camera bracket 2, a line scan camera, a light box 2 and a light box bracket 2; the area scan camera and the light box 1 are respectively connected with the camera bracket 1 and The first light box bracket is connected; the line scan camera and the second light box are respectively connected with the second camera bracket and the second light box bracket; The scanning camera is arranged on the horizontal screw moving table one of the camera bracket two through the vertical screw lifting table two and the horizontal screw moving table in turn; the light box one is provided with a strip hole, and the line scan camera is facing the light box one. strip hole; the second light box is arranged on the bracket through the second light box bracket, the third longitudinal screw lifting platform and the mobile table support frame in sequence, and the second light box is located at the bottom of the conveyor belt; the upper bracket of the second light box is provided with a rectangular hole, the second light box is connected to the area array The cameras are located on the upper and lower sides of the conveyor belt.

As an improvement to the large-size liquid crystal screen light guide plate defect image acquisition device of the present invention:

The number of the area scan cameras is two.

As a further improvement to the large-size liquid crystal screen light guide plate defect image acquisition device of the present invention:

The first auxiliary pulley and the second auxiliary pulley are respectively arranged on the bracket through the first auxiliary pulley bracket and the second auxiliary pulley bracket.

As a further improvement to the large-size liquid crystal screen light guide plate defect image acquisition device of the present invention:

The second light box and the area scan camera are located on the same vertical line.

The technical advantages of the large-size liquid crystal screen light guide plate defect image acquisition device of the utility model are:

The utility model controls the belt transmission platform to transmit the light guide plate at a constant speed through the transmission structure composed of the motor, the main power pulley, the auxiliary pulley, the V-belt, the belt transmission platform and the like. Limiting devices are reasonably designed on both sides of the conveyor belt to ensure the posture of the light guide plate before detection, so that the images collected subsequently are roughly the same. The high-quality image acquisition device for the light guide plate can realize automatic operation and further improve the detection efficiency of the light guide plate.

Description of drawings

The specific embodiments of the present utility model will be further described in detail below with reference to the accompanying drawings.

1 is a partial view of a camera of the present invention;

2 is a partial view of the limiting device of the present invention;

3 is a partial view of the transmission device of the present utility model;

Fig. 4 is the side view of the defect image acquisition device of the large-size liquid crystal screen light guide plate of the present invention;

Fig. 5 is the bottom view of the large-size liquid crystal screen light guide plate defect image acquisition device of the present invention;

FIG. 6 is an overall schematic diagram of a defect image acquisition device for a large-size liquid crystal screen light guide plate according to the present invention.

In the picture: bracket 1, motor 2, area scan camera 3, vertical screw lifting platform 1 4, camera bracket 1 5, horizontal screw moving platform 6, vertical screw lifting platform 2 7, camera bracket 2 8, horizontal screw Moving table one 9, horizontal screw moving table two 10, guide wheel mounting plate 11, guide wheel 12, belt conveying table one 13, light box bracket one 14, light box one 15, belt conveying table one main power pulley 16, power spindle 17. Belt conveyor 3 18, coupling 19, V-belt 1 20, belt conveyor 2 main power pulley 21, auxiliary pulley 1 22, auxiliary pulley 2 23, main power double pulley 24, V Model belt two 25, horizontal screw moving belt support frame 26, bottom horizontal screw moving belt support frame 27, line scan camera 28, light box two 29, light box bracket two 30, longitudinal screw lifting platform three 31, mobile table support frame 32. Horizontal screw moving table three 33 , horizontal screw moving table bracket 34 , auxiliary pulley bracket one 35 , auxiliary pulley bracket two 36 , belt conveying table two 37 .

Detailed ways

The present utility model will be further described below with reference to specific embodiments, but the protection scope of the present utility model is not limited thereto.

Embodiment 1. A large-size LCD screen light guide plate defect image acquisition device, as shown in Figures 1-6, includes a bracket 1, and the bracket 1 is respectively connected with the camera bracket 1 5, the camera bracket 2 8, the light box bracket 1 14, and the light box bracket 2 30 And other components are fixedly connected, which play the role of stably supporting the transmission device, the limit device, the image acquisition device, etc. The limiting device and the image collecting device are respectively located on both sides, below and above the conveying device, and are respectively used for limiting and collecting the light guide plate on the conveying device.

The transmission device includes: motor 2, guide wheel mounting plate 11, belt conveying table one 13, belt conveying table one main power pulley 16, power spindle 17, belt conveying table three 18, coupling 19, V-belt one 20, Belt conveyor 2 main power pulley 21, auxiliary pulley 1 22, auxiliary pulley 23, main power double pulley 24, V-belt 2 25, auxiliary pulley bracket 1 35, auxiliary pulley bracket 2 36, Belt conveyor table two 37.

The conveying device part is fixed on the bracket 1 by the belt conveying table one 13, the belt conveying table two 37, and the belt conveying table three 18, which play a supporting and fixing role; The main power pulley 16, the two main power pulleys of the belt conveying platform 21, and the main power double pulley 24 are driven; the motor 2 is connected with the main power double pulley 24 through the coupling 19 to provide power; The connecting pulley 24 is rotatably connected with the second main power pulley 21 of the belt conveying platform through the second V belt 25 to form a transmission structure. The second V belt 25 passes through the second auxiliary pulley 23, and the main power double pulley 24 drives the end conveyor belt to transmit , the second main power pulley 21 of the belt conveying table drives the intermediate conveyor belt to transmit; the main power double pulley 24 is also rotated and connected with the main power pulley 16 of the belt conveying table one through the V belt one 20 to form a transmission structure, and the V belt one 20 Passing through the auxiliary pulley one 22, the main power pulley 16 of the belt conveying table drives the head end conveyor belt for transmission. The motor 2 runs at a constant speed, and transmits power through a series of transmission structures, so that the conveyor belt can drive the light guide plate to advance at a constant speed. The first auxiliary pulley 22 and the second auxiliary pulley 23 are respectively arranged on the bracket 1 through the first auxiliary pulley bracket 35 and the second auxiliary pulley bracket 36, and the auxiliary pulley 22 and the auxiliary pulley 23 ensure the proper tension of the V-belt.

The limiting device includes: two guide wheel mounting plates 11 , four guide wheels 12 , two lateral screw moving platforms 10 , two lateral screw moving belt support frames 26 , and two bottom lateral screw moving belt support frames 27 .

Two bottom lateral screw moving belt support frames 27 are respectively arranged on the left and right sides of the head end conveyor belt, and a lateral screw moving belt support frame 26 is fixed on the bottom lateral screw moving belt support frame 27, and the lateral screw moving belt supports The frame 26 is provided with a slidable transverse screw moving table 2 10 , and each transverse screw moving table 2 10 is provided with two guide wheels 12 . The distance between the two limiting components can be adjusted through the horizontal screw moving table 2 10, and the light guide plate can be adjusted to be in a proper position on the conveyor belt.

The image acquisition device includes: area scan camera 3 , camera bracket 1 5 , light box bracket 1 14 , light box 1 15 , camera bracket 2 8 , line scan camera 28 , light box 2 29 , light box bracket 2 30 . The area scan camera 3 and the light box one 15 are respectively connected with the camera bracket one 5 and the light box bracket one 14, and the line scan camera 28 and the light box two 29 are respectively connected with the camera bracket two 8 and the light box bracket two 30, and play a fixed role. The area scan camera 3 is set on the horizontal screw moving platform 33 of the camera bracket one 5 through the vertical screw lifting platform 1 4, and the line scan camera 28 is sequentially arranged on the camera through the vertical screw lifting platform 2 7 and the horizontal screw moving platform 6. On the horizontal screw moving table one 9 of the bracket two 8 . The light box one 15 is provided with a strip hole, and the line scan camera 28 is facing the strip hole of the light box one 15, so as to photograph the light guide plate of the conveyor belt. The second light box 29 is arranged on the bracket 1 through the second light box bracket 30, the third longitudinal screw lifting platform 31 and the moving table support bracket 32 in sequence, and the second light box 29 is located at the bottom of the conveyor belt. The bracket 1 above the second light box 29 is provided with a rectangular hole, the second light box 29 and the area scan camera 3 are located on the same vertical line, and are respectively located on the upper and lower sides of the conveyor belt. Since the size of the light guide plate is relatively large, the resolution of a single area scan camera is insufficient, so two area scan cameras 3 are required.

After the system receives the photoelectric sensor signal, the light box one 15 is turned on, and the line scan camera 28 is triggered to continuously capture images, and the obtained light guide plate image is used for the subsequent algorithm to detect line defects. The light guide plate that has collected the line defect image is sent to the next working link by the back-end conveyor. When the system receives the signal from the photoelectric sensor 2, the light box 2 29 is turned on, and the area scan camera 3 is triggered to continuously collect images. The light plate image is used for subsequent algorithms to detect defects such as stains and black spots.

Finally, it should also be noted that the above list is only a few specific embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and many modifications are possible. All deformations that those of ordinary skill in the art can directly derive or associate from the disclosure of the present invention should be considered as the protection scope of the present invention.

Claims (4)

1. Jumbo size LCD screen light guide plate defect image acquisition device which characterized in that: comprises a conveying device, a limiting device and an image acquisition device;

the conveying device comprises a motor (2), a guide wheel mounting plate (11), a first belt conveying platform main power belt pulley (16), a power main shaft (17), a coupling (19), a first V-shaped belt (20), a second belt conveying platform main power belt pulley (21), a first auxiliary belt pulley (22), a second auxiliary belt pulley (23), a main power duplex belt pulley (24) and a second V-shaped belt (25);

the motor (2) is connected with a main power duplex belt wheel (24) through a coupling (19); the main power duplex belt wheel (24) is rotationally connected with the second main power belt wheel (21) of the belt conveying table through a V-shaped belt wheel (25) to form a transmission structure; the V-shaped belt II (25) penetrates through the auxiliary belt pulley II (23), and the main power duplex belt pulley (24) drives the tail end conveying belt to convey; the second belt conveying table drives an intermediate conveying belt to convey through a main power belt wheel (21); the main power duplex belt wheel (24) is further rotationally connected with a main power belt wheel (16) of the belt conveying platform through a V-shaped belt I (20) to form a transmission structure, the V-shaped belt I (20) penetrates through an auxiliary belt wheel I (22), and the main power belt wheel (16) of the belt conveying platform drives the head end conveying belt to convey;

the limiting device comprises two guide wheel mounting plates (11), four guide wheels (12), a transverse screw rod moving platform II (10), two transverse screw rod moving belt supporting frames (26) and two bottom transverse screw rod moving belt supporting frames (27); two bottom transverse screw rod moving belt supporting frames (27) are respectively arranged at the left side and the right side of the head end conveying belt, and a transverse screw rod moving belt supporting frame (26) is fixedly arranged on the bottom transverse screw rod moving belt supporting frame (27); a second transverse screw rod moving table (10) capable of sliding is arranged on the support frame (26) of the transverse screw rod moving belt, and two guide wheels (12) are arranged on each second transverse screw rod moving table (10);

the image acquisition device comprises an area-array camera (3), a camera support I (5), a lamp box support I (14), a lamp box I (15), a camera support II (8), a line scanning camera (28), a lamp box II (29) and a lamp box support II (30); the area-array camera (3) and the first lamp box (15) are respectively connected with the first camera support (5) and the first lamp box support (14); the line scanning camera (28) and the second light box (29) are respectively connected with the second camera support (8) and the second light box support (30); the area-array camera (3) is arranged on a third transverse screw rod moving platform (33) of the first camera support (5) through a first longitudinal screw rod lifting platform (4), and the line scanning camera (28) is arranged on a first transverse screw rod moving platform (9) of the second camera support (8) through a second longitudinal screw rod lifting platform (7) and a second transverse screw rod moving platform (6) in sequence; a strip-shaped hole is formed in the first light box (15), and the line scanning camera (28) is right opposite to the strip-shaped hole of the first light box (15); the second light box (29) is arranged on the support (1) sequentially through a second light box support (30), a third longitudinal screw rod lifting table (31) and a mobile table support frame (32), and the second light box (29) is positioned at the bottom of the conveyor belt; the support (1) above the second light box (29) is provided with a rectangular hole, and the second light box (29) and the area-array camera (3) are respectively positioned at the upper side and the lower side of the conveyor belt.

2. The large-size liquid crystal display light guide plate defect image collecting device according to claim 1, wherein:

the number of the area-array cameras (3) is two.

3. The large-size liquid crystal display light guide plate defect image collecting device according to claim 2, wherein:

the auxiliary belt wheel I (22) and the auxiliary belt wheel II (23) are arranged on the support (1) through an auxiliary belt wheel support I (35) and an auxiliary belt wheel support II (36) respectively.

4. The large-size liquid crystal display light guide plate defect image collecting device according to claim 3, wherein:

the second lamp box (29) and the area-array camera (3) are positioned on the same vertical line.

Images