Automatic detection system for liquid crystal module

Abstract

The invention relates to the technical field of automatic detection, in particular to a liquid crystal module automatic detection system, through a conveying device used for conveying a liquid crystal module and a detection device used for detecting the liquid crystal module on the conveying device, the liquid crystal module is conveyed along a roller type conveying belt until the side end of a flexible circuit board abuts against the side end of a standing plate; the roller type conveyor belt is triggered to stop conveying, the lifting part is triggered to drive the wiring board to descend at the same time, so that the wiring board abuts against the flexible circuit board, the wiring board is connected to the golden finger part of the flexible circuit board in a pressing mode, automatic wiring is achieved, meanwhile, the lifting part abuts against the station board to descend, and when the detection device completes detection of the liquid crystal module, the roller type conveyor belt continues conveying; at the moment, the standing plate is kept in a low-position state during descending until the next liquid crystal module is moved to the position below the detection cover, the standing plate is driven to move upwards and reset, then automatic positioning and automatic wiring detection of the next liquid crystal module are completed, and the batch detection efficiency is further improved.

Description

Technical Field

[0001] This invention relates to the field of automated testing technology, and in particular to an automated testing system for LCD modules. Background Technology

[0002] Existing LCD modules are widely used in various fields such as tablet computers, automotive interiors, and medical instrument display panels. An LCD module mainly consists of a display screen and an external flexible circuit board. The flexible circuit board is used to connect to external control circuits. Before shipment, LCD modules need to undergo a series of functional tests, including brightness, contrast, and appearance defects. For each test item, conventional testing devices such as luminance meters and optical inspection cameras can be used. However, in current industrial mass production of LCD modules, manual wiring of each LCD module is performed, followed by testing with a testing device aligned with the display screen. This operation is cumbersome and affects batch testing efficiency. Therefore, how to efficiently and stably complete the automatic wiring and testing of each LCD module urgently requires further research and improvement. Summary of the Invention

[0003] In view of this, the purpose of this invention is to propose an automated testing system for liquid crystal modules, in order to solve the problem of how to efficiently and stably complete the automatic wiring and testing of each liquid crystal module in the existing industrial mass production of liquid crystal modules, which urgently needs further research and development and improvement.

[0004] To achieve the above objectives, the present invention provides an automated testing system for liquid crystal modules, including a conveying device for conveying liquid crystal modules, and a testing device on the conveying device for testing the liquid crystal modules.

[0005] The conveying device is a roller conveyor belt, including side plates fixed on both sides, a conveying roller rotatably connected between the side plates on both sides, a detection cover mounted on the side plates on both sides, and a detection device located at the top inside the detection cover.

[0006] A testing platform is provided parallel to one side of the roller conveyor belt. The flexible circuit board of the LCD module passes through the side plate on one side and is laid flat on the testing platform. A lifting part is provided on the testing platform, and a wiring board is connected to the bottom of the lifting part.

[0007] A vertical groove is provided on the side of the testing platform at the testing cover. A station plate is vertically slidably connected in the groove. The LCD module is conveyed along the roller conveyor belt until the side of the flexible circuit board abuts against the side of the station plate, triggering the roller conveyor belt to stop conveying. At the same time, the lifting part is triggered to drive the wiring board to descend so that the wiring board presses against the flexible circuit board. Simultaneously, the lifting part pushes the station plate down. When the testing device completes the testing of the LCD module, the roller conveyor belt continues to convey until the next LCD module moves under the testing cover, causing the station plate to move up and reset.

[0008] Preferably, a movable plate is provided parallel to the side of the roller conveyor belt away from the inspection table. The movable plate is located inside the side plate and is set lower than the side plate to adjust the conveying width.

[0009] Preferably, it also includes a screw, one end of which is rotatably connected to the movable plate, and the other end of which passes through the side plate and is threadedly engaged with the side plate.

[0010] Preferably, the lifting unit includes a base plate fixed to the outside of the testing table, and a lifting device erected on the base plate.

[0011] Preferably, a pressure plate is connected to one side of the lifting device, and the pressure plate is located above the station plate.

[0012] Preferably, the flexible circuit board has a notch on its side, and one end of the station plate is connected to a protrusion, the cross-section of which is a triangular shape that matches the notch.

[0013] Preferably, the station plate is made of magnetic material.

[0014] Preferably, a magnetic suction plate is provided at the bottom of the vertical groove. One end of the magnetic suction plate is connected to a connecting rod. One end of the connecting rod passes through the position between the conveyor rollers and is connected to a push plate. One side end of the push plate is designed with an inclined end face. When the lifting part pushes the station plate down, the bottom end of the station plate is attracted to the magnetic suction plate. Until the next liquid crystal module moves under the detection cover, the front end of the liquid crystal module pushes the inclined end face of the push plate, driving the push plate to move down. The connecting rod and the magnetic suction plate move down synchronously, so that the station plate is detached from the magnetic suction plate and moves up to reset.

[0015] Preferably, the flexible circuit board is located on the rear side of the liquid crystal module.

[0016] The beneficial effects of this invention are as follows: Using a conveying device for transporting liquid crystal modules and a detection device on the conveying device for detecting liquid crystal modules, the liquid crystal modules are conveyed along a roller conveyor belt until the side end of the flexible circuit board abuts against the side end of the station plate. At this point, the roller conveyor belt is triggered to stop conveying, and simultaneously, a lifting unit is triggered to lower the wiring board, causing it to press against the flexible circuit board. The wiring board presses against the gold finger portion of the flexible circuit board, achieving automatic wiring. Simultaneously, the lifting unit pushes the station plate downwards. When the detection device completes the detection of the liquid crystal module, the roller conveyor belt continues to transport. The station plate remains in its lowered position until the next liquid crystal module moves under the detection cover, causing the station plate to move upwards and reset. This completes the automatic positioning and automatic wiring detection of the next liquid crystal module, further improving batch detection efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a top view of the roller conveyor belt structure of the present invention;

[0019] Figure 2 This is a top view schematic diagram of the detection cover and roller conveyor belt of the present invention;

[0020] Figure 3 This is a top view of the liquid crystal module, detection cover, and roller conveyor belt of the present invention.

[0021] Figure 4 This is a schematic diagram of the structure of the liquid crystal module during testing according to the present invention;

[0022] Figure 5 For the present invention Figure 4 Enlarged view of point A in the middle;

[0023] Figure 6 This is a schematic diagram of the structure when the next liquid crystal module of the present invention is moved under the detection cover;

[0024] Figure 7 For the present invention Figure 6 Enlarged view of point B in the middle;

[0025] Figure 8 This is a side view of the push plate structure of the present invention.

[0026] The diagram is marked as follows:

[0027] 100. LCD module; 101. Flexible circuit board; 102. Notch; 200. Roller conveyor belt; 201. Side plate; 202. Conveyor roller; 203. Movable plate; 204. Screw; 1. Detection cover; 2. Detection table; 3. Lifting part; 31. Base plate; 32. Lifting device; 33. Pressure plate; 4. Wiring board; 5. Vertical groove; 6. Station plate; 61. Protrusion; 7. Connecting rod; 8. Push plate. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0029] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, an automated testing system for liquid crystal modules includes a conveying device for conveying liquid crystal modules 100 and a testing device on the conveying device for testing the liquid crystal modules 100. The conveying device is a roller conveyor belt 200, including side plates 201 fixedly arranged on both sides. A conveying roller 202 is rotatably connected between the side plates 201. A testing cover 1 is mounted on the side plates 201. The testing device is located at the top of the testing cover 1. A testing platform 2 is arranged parallel to one side of the roller conveyor belt 200. The flexible circuit board 101 of the liquid crystal module 100 passes through the side plate 201 on one side and is laid flat on the testing platform 2. A lifting part 3 is provided on the testing platform 2. The bottom of the lifting part 3... A terminal block 4 is connected to the end of the test platform 2. A vertical groove 5 is provided on the side of the test cover 1. A station plate 6 is vertically slidably connected in the vertical groove 5. The LCD module 100 is conveyed along the roller conveyor belt 200 until the side of the flexible circuit board 101 abuts against the side of the station plate 6, triggering the roller conveyor belt 200 to stop conveying. At the same time, the lifting part 3 is triggered to drive the terminal block 4 to descend so that the terminal block 4 presses against the flexible circuit board 101. At the same time, the lifting part 3 pushes the station plate 6 to descend. When the test device completes the test of the LCD module 100, the roller conveyor belt 200 continues to convey until the next LCD module 100 moves under the test cover 1, driving the station plate 6 to move up and reset.

[0031] This invention includes a conveying device for conveying a liquid crystal module 100 and a detection device on the conveying device for detecting the liquid crystal module 100. The conveying device is a roller conveyor belt 200, including side plates 201 fixedly arranged on both sides. A conveying roller 202 is rotatably connected between the side plates 201. Specifically, the end of the conveying roller 202 is rotatably connected to the side plate 201 through a roller shaft. One end of the roller shaft that extends out of the side plate 201 can be connected to a conventional transmission mechanism such as a spool or chain wheel, and is driven to rotate by a drive motor, thereby driving each conveying roller 202 to rotate and convey the liquid crystal module 100 forward. A detection cover 1 is mounted on the side plates 201 on both sides. The detection device is located at the top of the detection cover 1. The detection cover 1 serves to block light and does not affect the conveying of the liquid crystal module 100 on the roller conveyor belt 200. The detection device can be a conventional device such as a luminance meter or an optical detection camera, used for detecting the display screen of the liquid crystal module 100 facing downwards.

[0032] Specifically, a testing platform 2 is provided parallel to one side of the roller conveyor belt 200. The flexible circuit board 101 of the LCD module 100 passes through the side plate 201 on one side and is laid flat on the testing platform 2. That is, the side plate 201 on one side is divided into an upper plate and a lower plate. A gap is left between the upper plate and the lower plate for the flexible circuit board 101 to pass through and move laterally. The upper plate and the lower plate can be fixedly connected by an outer bracket. The testing platform 2 is provided with a lifting part 3. A wiring plate 4 is connected to the bottom end of the lifting part 3. A vertical groove 5 is opened on the testing platform 2 at the side end of the testing cover 1. A station plate 6 is vertically slidably connected in the vertical groove 5. The LCD module 100 is conveyed along the roller conveyor belt 200 until the side end of the flexible circuit board 101 abuts against the side end of the station plate 6. Figure 4 , Figure 5 As shown, the trigger roller conveyor 200 stops conveying, and simultaneously triggers the lifting part 3 to drive the wiring plate 4 to descend, so that the wiring plate 4 presses against the flexible circuit board 101. The wiring plate 4 presses against the gold finger part of the flexible circuit board 101 to realize automatic wiring. At the same time, the lifting part 3 pushes the station plate 6 to descend. When the detection device completes the detection of the LCD module 100, the roller conveyor 200 continues to convey. At this time, the station plate 6 remains in the low position when descending, until the next LCD module 100 moves under the detection cover 1, as shown. Figure 6 , Figure 7 As shown, this causes the station board 6 to move upward and reset, thereby completing the automatic positioning and automatic wiring detection of the next LCD module 100, further improving the efficiency of batch testing.

[0033] In embodiments of the present invention, optionally, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7As shown, a movable plate 203 is provided parallel to the side of the roller conveyor belt 200 away from the detection table 2. The movable plate 203 is located inside the side plate 201 and is used to adjust the conveying width. The conveying width is slightly larger than the width of the display screen of the LCD module 100, so that the width of the LCD module 100 is limited on both sides by the side plate 201 and the movable plate 203, and is always conveyed forward in the center. The movable plate 203 is set lower than the side plate 201 and will not interfere with the detection cover 1.

[0034] Specifically, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, it also includes a screw 204. One end of the screw 204 is rotatably connected to the movable plate 203, and the other end passes through the side plate 201 and is threadedly engaged with the side plate 201. Thus, by manually rotating the screw 204, the movable plate 203 is moved laterally, thereby adjusting the conveying width.

[0035] Specifically, the inner sides of the side plate 201 and the movable plate 203 can also be rotatably connected with ball bearings, which abut against the width of the display screen of the LCD module 100 to efficiently center and transport the LCD module 100.

[0036] In embodiments of the present invention, optionally, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the lifting unit 3 includes a base plate 31 fixed to the outside of the testing table 2, and a lifting device 32 erected on the base plate 31. The lifting device 32 can be a conventional component such as a lifting cylinder, used to drive the wiring board 4 to move up and down.

[0037] In embodiments of the present invention, optionally, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, a pressure plate 33 is connected to one side of the lifting device 32. The pressure plate 33 is located above the station plate 6. The lifting device 32 drives the wiring plate 4 and the pressure plate 33 to move up and down synchronously, thereby pushing the station plate 6 down through the pressure plate 33.

[0038] In embodiments of the present invention, optionally, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 ,Figure 5 , Figure 6 , Figure 7 As shown, a notch 102 is provided on the side end of the flexible circuit board 101, and a protrusion 61 is connected to one end of the station plate 6. The cross-section of the protrusion 61 is a triangular shape that matches the notch 102. The station plate 6 is configured as a long plate parallel to the length direction of the flexible circuit board 101. When the side end of the flexible circuit board 101 abuts against the side end of the station plate 6, as... Figure 1 , Figure 2 As shown, the station plate 6 abuts against the side of the flexible circuit board 101. Even if the LCD module 100 deviates slightly from the center position during transmission, the protrusion 61 can extend into the notch 102 to limit the movement, allowing the flexible circuit board 101 to move to the target position so that the connector 4 can accurately press against the gold finger portion of the flexible circuit board 101. Optionally, the side of the station plate 6 can also be embedded with conventional components such as distance sensors and touch sensors. The sensor components are electrically connected to the roller conveyor belt 200 and the lifting part 3. When the side of the flexible circuit board 101 abuts against the side of the station plate 6, the sensor components are triggered, thereby triggering the roller conveyor belt 200 to stop transmission and triggering the lifting part 3 to descend. After the detection device completes the detection of the LCD module 100, the roller conveyor belt 200 resumes transmission, while the lifting part 3 rises and resets. The station plate 6 remains in the low position when it descended, allowing the flexible circuit board 101 to continue to be transmitted forward.

[0039] In embodiments of the present invention, optionally, such as Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 4 , Figure 5 As shown, the station plate 6 can be made of magnetic material and is used to magnetically adsorb the side end of the flexible circuit board 101, which is conducive to further efficient and stable positioning of the flexible circuit board 101.

[0040] In embodiments of the present invention, optionally, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 1As shown, a magnetic suction plate (parallel to the length of the station plate 6 and flattened, not shown in the figure) is provided at the bottom of the vertical groove 5. Elastic components such as springs and elastic ropes are connected between the bottom end of the magnetic suction plate and the bottom end of the vertical groove 5. Elastic components such as springs and elastic ropes are also connected between the station plate 6 and the interior of the vertical groove 5 to drive the magnetic suction plate and station plate 6 upwards. One end of the magnetic suction plate is connected to a connecting rod 7. One end of the connecting rod 7 passes through the vertical groove 5 and into the position between the conveyor rollers 202, and is connected to a push plate 8. Specifically, the push plate 8 is located at the rear lower position of the detection cover 1. Figure 2 As shown, one side end of the push plate 8 is designed with an inclined end face, so that when the side end of the flexible circuit board 101 abuts against the side end of the station plate 6, as... Figure 3 , Figure 4 As shown, at this time, the push plate 8 is located behind the display screen of the LCD module 100 to be tested. The push plate 8 is elastically reset upward. At this time, the lifting part 3 pushes the station plate 6 downward so that the bottom end of the station plate 6 is attracted to the magnetic plate. When the testing device completes the testing of the LCD module 100, the roller conveyor belt 200 continues to convey, and the lifting part 3 rises and resets. The station plate 6 is attracted by the magnetic plate and remains in a low position when it is descending until the next LCD module 100 moves into the bottom of the testing cover 1. The front side of the display screen of the LCD module 100 pushes the inclined end face of the push plate 8 first so that the push plate 8 moves down so that the station plate 6 is released from the magnetic plate and moves up to reset. This completes the repeated batch testing process.

[0041] In embodiments of the present invention, optionally, such as Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 8 , Figure 4 , Figure 5 Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 As shown, the flexible circuit board 101 is located on the rear side of the liquid crystal module 100.

[0042] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.

Claims

1. An automated testing system for liquid crystal modules, comprising a conveying device for conveying liquid crystal modules (100), and a testing device on the conveying device for testing the liquid crystal modules (100), characterized in that: The conveying device is a roller conveyor belt (200), including side plates (201) fixedly arranged on both sides, a conveying roller (202) rotatably connected between the side plates (201) on both sides, and a detection cover (1) is mounted on the side plates (201) on both sides, with the detection device located at the top inside the detection cover (1). A test platform (2) is provided parallel to one side of the roller conveyor belt (200). The flexible circuit board (101) of the liquid crystal module (100) passes through the side plate (201) on one side and is laid flat on the test platform (2). A lifting part (3) is provided on the test platform (2), and a wiring board (4) is connected to the bottom end of the lifting part (3). A vertical groove (5) is provided on the side of the test cover (1) on the test table (2). A station plate (6) is vertically slidably connected in the vertical groove (5). The liquid crystal module (100) is conveyed along the roller conveyor belt (200) until the side of the flexible circuit board (101) abuts against the side of the station plate (6), triggering the roller conveyor belt (200) to stop conveying. At the same time, the lifting part (3) is triggered to drive the wiring plate (4) to descend so that the wiring plate (4) presses against the flexible circuit board (101). At the same time, the lifting part (3) pushes the station plate (6) to descend. When the test device completes the test of the liquid crystal module (100), the roller conveyor belt (200) continues to convey until the next liquid crystal module (100) moves into the bottom of the test cover (1), driving the station plate (6) to move up and reset.

2. The automated testing system for liquid crystal modules according to claim 1, characterized in that, The roller conveyor belt (200) has a movable plate (203) parallel to the side away from the detection table (2). The movable plate (203) is located inside the side plate (201) and is set lower than the side plate (201) to adjust the conveying width.

3. The automated testing system for liquid crystal modules according to claim 2, characterized in that, It also includes a screw (204), one end of which is rotatably connected to the movable plate (203), and the other end passes through the side plate (201) and is threadedly engaged with the side plate (201).

4. The automated testing system for liquid crystal modules according to claim 1, characterized in that, The lifting unit (3) includes a base plate (31) fixed to the outside of the testing table (2) and a lifting device (32) erected on the base plate (31).

5. The automated testing system for liquid crystal modules according to claim 4, characterized in that, A pressure plate (33) is connected to one side of the lifting device (32), and the pressure plate (33) is located above the station plate (6).

6. The automated testing system for liquid crystal modules according to claim 1, characterized in that, The flexible circuit board (101) has a notch (102) on its side end, and a protrusion (61) is connected to one end of the station plate (6). The cross-section of the protrusion (61) is a triangular shape that matches the notch (102).

7. The automated testing system for liquid crystal modules according to claim 1, characterized in that, The station plate (6) is made of magnetic material.

8. The automated testing system for liquid crystal modules according to claim 7, characterized in that, A magnetic suction plate is provided at the bottom of the vertical groove (5). One end of the magnetic suction plate is connected to a connecting rod (7). One end of the connecting rod (7) is inserted into the position between the conveyor rollers (202) and connected to a push plate (8). One side of the push plate (8) is designed with an inclined end face. When the lifting part (3) pushes the station plate (6) down, the bottom end of the station plate (6) is attracted to the magnetic suction plate. When the next liquid crystal module (100) moves into the detection cover (1), the front end of the liquid crystal module (100) pushes the inclined end face of the push plate (8), causing the push plate (8) to move down. The connecting rod (7) and the magnetic suction plate move down synchronously, so that the station plate (6) is detached from the magnetic suction plate and moves up to reset.

9. The automated testing system for liquid crystal modules according to claim 8, characterized in that, The flexible circuit board (101) is located on the rear side of the liquid crystal module (100).

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