Equipment for detecting front and back surface attachment precision of liquid crystal display panel

Abstract

The utility model relates to the technical field of detection, in particular to equipment for detecting the front and back surface attachment precision of a liquid crystal display panel. A front face precision detection device and a back face precision detection device are arranged on the workbench in parallel. The front precision detection device comprises a first track, a first linear motor is arranged on the first track, and a first discharging platform is arranged at the top of the first linear motor; the workbench is provided with a front CG and PANEL lamination precision detection mechanism and an FPC circuit area detection mechanism. According to the liquid crystal display panel front and back surface attaching precision detection equipment, a liquid crystal display panel to be detected is placed on the first material placing platform, the first linear motor drives the first material placing platform to move along the first track, and the liquid crystal display panel is detected by the front surface CG and PANEL attaching precision detection mechanism and the FPC circuit area detection mechanism; the three detection procedures are completed in one piece of equipment, so that the transfer time is greatly saved, the efficiency is improved, and the risk of transfer damage is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of detection, and in particular to a device for detecting the attachment accuracy of the front and back surfaces of a liquid crystal display panel. Background Art

[0002] With the continuous development of display technology, liquid crystal display products are becoming more and more mainstream display products. In the prior art, in order to ensure the quality of liquid crystal display products, it is necessary to test the attachment accuracy of the front and back sides of the liquid crystal display panel, including the front CG and PANEL attachment accuracy detection, the back foam and GLASS attachment accuracy detection and the FPC circuit area detection. The three detection processes are respectively detected in different semi-automatic equipment. The detection process is not continuous and the product needs to be transferred between the equipment, which not only increases the transportation time and consumes manpower, but also has the risk of equipment damage during the transportation process. Therefore, it is necessary to design a liquid crystal display panel front and back attachment accuracy detection device that combines the three detection processes. Utility Model Content

[0003] In view of the defects in the prior art, the utility model provides a device for detecting the attachment accuracy of the front and back surfaces of a liquid crystal display panel.

[0004] The technical solution adopted by the utility model is: a liquid crystal display panel front and back side attachment accuracy detection device, comprising a frame and a workbench arranged on the top of the frame, on which a front side accuracy detection device and a back side accuracy detection device are arranged in parallel; the front side accuracy detection device comprises a first track, on which a first linear motor is arranged, on the top of which a first rotary motor is arranged, and the rotating shaft of the first rotary motor is connected to a first material discharge platform; on the workbench, a front side CG and PANEL attachment accuracy detection mechanism and an FPC circuit area detection mechanism are arranged from left to right, which are located above the first track and higher than the first material discharge platform.

[0005] In order to better realize the utility model, the front CG and PANEL fitting accuracy detection mechanism includes a first detection camera and a second detection camera. The first detection camera is equipped with four first light sources irradiating from four directions of front, back, left and right, and the second detection camera is equipped with a second light source irradiating from top to bottom.

[0006] In order to better realize the utility model, the FPC circuit area detection mechanism includes two third detection cameras and two fourth detection cameras, each third detection camera is equipped with a third light source below, and each fourth detection camera is equipped with a fourth light source below.

[0007] In order to better implement the utility model, a fifth detection camera and a sixth detection camera are also included. A fifth light source is arranged below the fifth detection camera, and a sixth light source is arranged below the sixth detection camera.

[0008] In order to better realize the utility model, the back side precision detection device includes a second track arranged on the workbench and parallel to the first track, a second linear motor is arranged on the second track, a second rotary motor is arranged on the top of the second linear motor, and the rotating shaft of the second rotary motor is connected to the second material discharge platform; a seventh detection camera and an eighth detection camera are arranged from left to right on the workbench, which are located above the second track and higher than the second material discharge platform, the seventh detection camera is equipped with four seventh light sources that irradiate from four directions of front, back, left and right, and an eighth light source is arranged below the eighth detection camera.

[0009] In order to better implement the utility model, a light source controller is arranged at the lower part of the frame, and the first light source, the second light source, the third light source, the fourth light source, the fifth light source, the sixth light source, the seventh light source and the eighth light source are all connected to the light source controller.

[0010] In order to better realize the utility model, a visual host is also arranged at the lower part of the frame, and is equipped with a corresponding touch control screen. The first detection camera, the second detection camera, the third detection camera, the fourth detection camera, the fifth detection camera, the sixth detection camera, the seventh detection camera and the eighth detection camera are all connected to the visual host.

[0011] The beneficial effects of the utility model are embodied in: the front and back side attachment accuracy detection equipment of the liquid crystal display panel of the utility model, through the cooperation of the frame, the workbench, the back side accuracy detection device, the first track, the first linear motor, the first rotating motor, the first unloading platform, the front CG and PANEL bonding accuracy detection mechanism and the FPC circuit area detection mechanism, etc., when in use, the liquid crystal display panel to be detected is placed from the first unloading platform, the first linear motor brings the first unloading platform to move forward along the first track, passes through the front CG and PANEL bonding accuracy detection mechanism and the FPC circuit area detection mechanism to detect the front side, and then the first linear motor brings the first unloading platform back to the initial position along the first track, removes the liquid crystal display panel to be detected, flips it over, and puts it into the back side accuracy detection device to detect the bonding accuracy of the back foam and GLASS, and completes the three detection processes in one device, which not only greatly saves the transportation time and improves the efficiency, but also reduces the risk of transportation damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0013] Figure 1 A structural schematic diagram of a device for detecting the accuracy of attaching the front and back surfaces of a liquid crystal display panel according to the utility model;

[0014] Figure 2 Another structural schematic diagram of the device for detecting the accuracy of attaching the front and back surfaces of a liquid crystal display panel according to the utility model;

[0015] Figure 3 It is a structural schematic diagram of the first detection camera and the seventh detection camera of the liquid crystal display panel front and back surface attachment accuracy detection device of the utility model when they are working;

[0016] Figure 4 It is a structural schematic diagram of the second detection camera of the liquid crystal display panel front and back surface attachment accuracy detection device of the utility model when working;

[0017] Figure 5 It is a structural schematic diagram of the third detection camera and the fourth detection camera of the liquid crystal display panel front and back surface attachment accuracy detection device of the utility model when they are working;

[0018] Figure 6 It is a structural schematic diagram of the fifth detection camera of the liquid crystal display panel front and back surface attachment accuracy detection device of the utility model when working;

[0019] Figure 7 It is a structural schematic diagram of the sixth detection camera and the eighth detection camera of the liquid crystal display panel front and back surface attachment accuracy detection device of the utility model when they are working;

[0020] In the accompanying drawings, 1—frame, 2—first track, 3—first linear motor, 4—first unloading platform, 5—first detection camera, 6—first light source, 7—second detection camera, 8—second light source, 9—third detection camera, 10—third light source, 11—fourth detection camera, 12—fourth light source, 13—fifth detection camera, 14—fifth light source, 15—sixth detection camera, 16—sixth light source, 17—light source controller, 18—visual host, 19—touch control screen, 20—moving roller, 21—support foot, 22—second track, 23—second unloading platform, 24—seventh detection camera, 25—eighth detection camera, 26—eighth light source, 27—liquid crystal display panel to be detected, 28—ring light source. DETAILED DESCRIPTION

[0021] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0022] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field of this utility model.

[0023] Example:

[0024] like Figures 1 to 7 As shown, the front and back side attachment accuracy detection device of the liquid crystal display panel of the utility model comprises a frame 1 and a workbench arranged on the top of the frame 1, on which a front side accuracy detection device and a back side accuracy detection device are arranged in parallel; the front side accuracy detection device comprises a first track 2, on which a first linear motor 3 is arranged, on the top of the first linear motor 3 a first rotary motor is arranged, and the rotating shaft of the first rotary motor is connected to a first material discharge platform 4; on the workbench, from left to right, a front CG and PANEL attachment accuracy detection mechanism and an FPC circuit area detection mechanism are arranged, which are located above the first track 2 and higher than the first material discharge platform 4. The utility model discloses a device for detecting the accuracy of attaching the front and back sides of a liquid crystal display panel. The device cooperates with a frame 1, a workbench, a back side accuracy detection device, a first track 2, a first linear motor 3, a first rotating motor, a first unloading platform 4, a front CG and PANEL bonding accuracy detection mechanism, and an FPC circuit area detection mechanism. When in use, a liquid crystal display panel 27 to be detected is placed on the first unloading platform 4, the first linear motor 3 brings the first unloading platform 4 to move forward along the first track 2, the front side is detected by the front CG and PANEL bonding accuracy detection mechanism and the FPC circuit area detection mechanism, and then the first linear motor 3 brings the first unloading platform 4 back to the initial position along the first track 2, the liquid crystal display panel 27 to be detected is removed, turned over, and placed in a back side accuracy detection device to detect the bonding accuracy of the back side foam and the GLASS. The three detection processes are completed in one device, which not only greatly saves the transportation time and improves the efficiency, but also reduces the risk of transportation damage. It should be noted that the first discharge platform 4 is hollow and has air holes at the top. A suction port is provided on the side of the first discharge platform 4. The suction port is connected to a vacuum pump. The vacuum pump draws air to allow the first discharge platform 4 to generate negative pressure to adsorb the liquid crystal display panel 27 to be tested, thereby preventing deviation during movement and improving stability. The bottom of the frame 1 is provided with a movable roller 20 for easy movement, which can facilitate the movement of the entire device. A threaded support foot 21 is also provided at the bottom of the frame 1. When the movable roller 20 is moved to a suitable position, the support foot 21 can be used for stable support.

[0025] Preferably, the front CG and PANEL fitting accuracy detection mechanism includes a first detection camera 5 and a second detection camera 7. The first detection camera 5 is equipped with four first light sources 6 that illuminate from four directions, front, back, left, and right. The second detection camera 7 is equipped with a second light source 8 that illuminates from top to bottom. The liquid crystal display panel 27 to be detected is placed on the first unloading platform 4. The liquid crystal display panel 27 to be detected moves along the first track 2 with the first linear motor. When it reaches the vicinity of the first detection camera 5, the first light source 6 triggers a line scan photo, and a multi-angle front line scan photo is taken. Figure 4 When it reaches the vicinity of the second detection camera 7, the second light source 8 triggers the second detection camera 7 to take a photo. Figure 1 open.

[0026] Preferably, the FPC circuit area detection mechanism includes two third detection cameras 9 and two fourth detection cameras 11. A third light source 10 is provided below each third detection camera 9, and a fourth light source 12 is provided below each fourth detection camera 11. When the liquid crystal display panel 27 to be detected reaches the vicinity of the third detection camera 9, the third light source 10 triggers the third detection camera 9 to take a photo. Figure 3 Ten (long side edge detection), then the first rotary motor rotates to rotate the first material discharging platform 4 by 90°; when the liquid crystal display panel 27 to be detected reaches the vicinity of the fourth detection camera 11, the fourth light source 12 triggers the fourth detection camera 11 to take a picture, and the fourth light source 12 triggers the fourth detection camera 11 to take a picture. Figure 2 Ten images (short side edge detection).

[0027] As a preferred embodiment, a fifth inspection camera 13 and a sixth inspection camera 15 are also included. A fifth light source 14 is arranged below the fifth inspection camera 13, and a sixth light source 16 is arranged below the sixth inspection camera 15. When the liquid crystal display panel 27 to be inspected reaches the vicinity of the fifth inspection camera 13, the first rotating motor drives the first material discharging platform 4 to reverse and rotate to the initial position 0°, and the fifth inspection camera 13 starts to take pictures (front color photography position) Figure 1 When the liquid crystal display panel 27 to be inspected moves to the sixth light source 16 near the position of the sixth inspection camera 15, the sixth inspection camera 15 is triggered to take a picture once, and then the sixth inspection camera 15 moves a certain distance in a direction perpendicular to the first track 2 to take a second picture, and then moves a certain distance to take a third picture. After the inspection of the liquid crystal display panel 27 to be inspected is completed, each part returns to the initial position for the next inspection.

[0028] Preferably, the back side precision detection device includes a second track 22 arranged on a workbench and parallel to the first track 2, a second linear motor is arranged on the second track 22, a second rotary motor is arranged on the top of the second linear motor, and the rotating shaft of the second rotary motor is connected to the second material discharge platform 23; a seventh detection camera 24 and an eighth detection camera 25 are arranged on the workbench from left to right, which are located above the second track 22 and higher than the second material discharge platform 23, the seventh detection camera 24 is equipped with four seventh light sources irradiating from four directions of front, back, left and right, and an eighth light source 26 is arranged below the eighth detection camera 25. The operator flips the liquid crystal display panel 27 to be inspected and places it on the second material discharge platform 23. The second linear motor moves along the second track. When it reaches the vicinity of the seventh detection camera, it takes line scan photos and multi-angle front line scan photos. Figure 4 When the liquid crystal display panel 27 to be detected reaches the vicinity of the eighth detection camera 25, the eighth light source 26 triggers the eighth detection camera 25 to take pictures (multi-angle reverse photography, take Figure 4 open).

[0029] Preferably, a light source controller 17 is provided at the lower part of the frame 1, and the first light source 6, the second light source 8, the third light source 10, the fourth light source 12, the fifth light source 14, the sixth light source 16, the seventh light source and the eighth light source 26 are all connected to the light source controller 17. Preferably, a visual host 18 is also provided at the lower part of the frame 1, and is matched with a corresponding touch control screen 19, and the first detection camera 5, the second detection camera 7, the third detection camera 9, the fourth detection camera 11, the fifth detection camera 13, the sixth detection camera 15, the seventh detection camera 24 and the eighth detection camera 25 are all connected to the visual host 18. It should be noted that the motor, vacuum pump, etc. can be controlled by pLC, the light source controller 17 is connected to the visual host 18 to exchange corresponding data, and the detection photos taken by each detection camera are stored in the visual host 18, which can be conveniently compared and detected, and the staff can operate and control through the touch control screen 19.

[0030] Inspection process of front accuracy inspection device

[0031] The LCD panel 27 to be inspected is placed on the first unloading platform 4. After pressing the loading completion button, the LCD panel 27 to be inspected moves along the first track 2. When it reaches the vicinity of the first inspection camera 5, the line scan is triggered to take pictures. When it reaches the vicinity of the fourth inspection camera 12, the picture taking is completed. The first picture taking is completed (the first inspection camera 5 (multi-angle front line scan) takes pictures). Figure 4 The second detection camera 7 takes Figure 1 open).

[0032] The LCD panel 27 to be inspected moves from the fourth inspection camera position back to the third inspection camera 9 position (150 mm back from the third inspection camera 9 position) and the θ axis (rotating shaft of the rotating motor) rotates about 90°. At this time, the LCD panel 27 to be inspected moves horizontally past the third inspection camera 7 to trigger the start of photographing. Figure 3 Ten (long side edge detection), after passing the fourth detection camera 11, take Figure 2 Ten images (short edge detection starts).

[0033] When the LCD panel 27 to be inspected reaches the vicinity of the fifth inspection camera 13, the θ axis rotates to the initial position 0°, and the fifth inspection camera 13 starts to take pictures (front color photography position). Figure 1 open.

[0034] When the LCD panel 27 to be inspected moves to the vicinity of the sixth inspection camera 15, the sixth inspection camera 15 is triggered to take a picture once, and then the Y axis moves a certain distance to take a picture twice, and finally the Y axis moves three times to take a picture. After the product inspection is completed, the X, Y, and θ axes return to their initial positions and move to the initial position of the first track 2, and the inspection is completed (the three movement distances of the Y axis can be set on the touch screen according to actual needs)

[0035] Back side precision detection device

[0036] The operator takes the LCD panel 27 to be inspected off the first unloading platform 4 and places it on the second unloading platform 23. The LCD panel 27 to be inspected moves along the second track 22. When it reaches the seventh inspection camera position, the line scan triggers the photo taking. The photo taking ends when it reaches the eighth inspection camera 25 position. (Multi-angle reverse side photo taking, take Figure 4 open).

[0037] It should be noted that, in order to improve the detection accuracy, the angles of the first detection camera 5 and the seventh detection camera 24 are adjustable within 15°±5°. Figure 3 As shown, the distance from the lens to the product is 380mm±50mm; the length of the lens + camera is 160mm;

[0038] The four first light sources 6 and the four seventh light sources are equipped with an R-axis fine-tuning platform and a Z-axis fine-tuning platform, which can be easily fine-tuned.

[0039] Light source 1: Angle 2 is adjustable at 15°±5°, and the distance from the light source to the product is adjustable at 100mm±20mm;

[0040] Light source 2: Angle 3 is adjustable at 35°±15°; the distance from the light source to the product is adjustable at 100mm±20mm;

[0041] Light source 3: Angle 4 is adjustable at 60°±15°, and the distance from the light source to the product is adjustable at 100mm±20mm;

[0042] Light source 4: Angle 5 is adjustable at 35°±15°; the distance from the light source to the product is adjustable at 100mm±20mm;

[0043] The cameras (the first detection camera and the seventh detection camera 24) and the light sources (the first light source 6 and the seventh light source) can be adjusted on the Z axis and the R axis using a fine-tuning platform, and the light sources and cameras can be adjusted on the Y axis (that is, the direction of the slide rail). The Z axis is an axis perpendicular to the first material discharging platform 4, that is, in the vertical direction, R is an arc angle relative to the first material discharging platform 4, and the Y axis is a longitudinal adjustment relative to the first material discharging platform 4.

[0044] For the second detection camera 7, as shown in the schematic diagram Figure 4 As shown, the second detection camera 7 and the second light source 8 are adjusted on the Z axis and the R axis (0°-90°) using a fine-tuning platform; the second detection camera 7 and the second light source 8 can be adjusted on the Y axis (corresponding slide rail).

[0045] For the third detection camera 9 and the fourth detection camera 11, as shown in the schematic diagram Figure 5 As shown, the cameras (the third detection camera 9 and the fourth detection camera 11) and the light sources (the third light source 10 and the fourth light source 12) are adjusted on the Z axis and the R axis (0°-90°) using a fine-tuning platform; the light source and the camera can be adjusted on the Y axis (corresponding slide rail).

[0046] For the fifth detection camera 13, as shown in the schematic diagram Figure 6 As shown, the fifth detection camera 13 and the fifth light source 14 are adjusted on the Z axis using a fine-tuning platform. The fifth detection camera 13 and the fifth light source 14 can be adjusted individually or together as a whole.

[0047] The sixth detection camera 15 and the eighth detection camera 25, as shown in the schematic diagram Figure 7 As shown, a ring light source 28 is provided below the seventh light source and the eighth light source 26. The light source and the camera need to be adjusted on the Z axis using a fine-tuning platform. The camera and the light source can be adjusted individually or together.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. Liquid crystal display panel front and back attachment accuracy detection equipment, characterized by: The invention comprises a frame (1) and a workbench arranged on the top of the frame (1), on which a front side precision detection device and a back side precision detection device are arranged in parallel; the front side precision detection device comprises a first track (2), on which a first linear motor (3) is arranged, on the top of which a first rotary motor (3) is arranged, and the rotating shaft of the first rotary motor is connected to a first material discharge platform (4); on the workbench, from left to right, a front side CG and PANEL lamination precision detection mechanism and an FPC circuit area detection mechanism are arranged, which are located above the first track (2) and higher than the first material discharge platform (4).

2. The device for detecting the front and back surface attachment accuracy of a liquid crystal display panel according to claim 1, characterized in that: The front CG and PANEL lamination accuracy detection mechanism comprises a first detection camera (5) and a second detection camera (7), wherein the first detection camera (5) is equipped with four first light sources (6) for irradiating from four directions, front, back, left, and right, and the second detection camera (7) is equipped with a second light source (8) for irradiating from top to bottom.

3. The device for detecting the front and back surface attachment accuracy of a liquid crystal display panel according to claim 2, characterized in that: The FPC circuit area detection mechanism comprises two third detection cameras (9) and two fourth detection cameras (11), each third detection camera (9) is provided with a third light source (10) below, and each fourth detection camera (11) is provided with a fourth light source (12) below.

4. The device for detecting the front and back surface attachment accuracy of a liquid crystal display panel according to claim 3, characterized in that: It also includes a fifth detection camera (13) and a sixth detection camera (15), wherein a fifth light source (14) is arranged below the fifth detection camera (13), and a sixth light source (16) is arranged below the sixth detection camera (15).

5. The device for detecting the adhesion accuracy of the front and back surfaces of a liquid crystal display panel according to claim 4, characterized in that: The back side precision detection device comprises a second track (22) arranged on a workbench and parallel to the first track (2), a second linear motor is arranged on the second track (22), a second rotary motor is arranged on the top of the second linear motor, and the rotating shaft of the second rotary motor is connected to the second material discharge platform (23); a seventh detection camera (24) and an eighth detection camera (25) are arranged on the workbench from left to right, which are located above the second track (22) and higher than the second material discharge platform (23), the seventh detection camera (24) is equipped with four seventh light sources that illuminate from four directions of front, back, left and right, and an eighth light source (26) is arranged below the eighth detection camera (25).

6. The device for detecting the adhesion accuracy of the front and back surfaces of a liquid crystal display panel according to claim 5, characterized in that: A light source controller (17) is arranged at the lower part of the frame (1), and the first light source (6), the second light source (8), the third light source (10), the fourth light source (12), the fifth light source (14), the sixth light source (16), the seventh light source and the eighth light source (26) are all connected to the light source controller (17).

7. The device for detecting the front and back surface attachment accuracy of a liquid crystal display panel according to claim 6, characterized in that: A visual host (18) is also provided at the lower part of the frame (1), and is matched with a corresponding touch control screen (19); the first detection camera (5), the second detection camera (7), the third detection camera (9), the fourth detection camera (11), the fifth detection camera (13), the sixth detection camera (15), the seventh detection camera (24) and the eighth detection camera (25) are all connected to the visual host (18).

Images