Automatic assembly method and automatic assembly device for segment code screen and backlight sheet

Abstract

The present invention relates to a method and device for laminating and adjusting a segment code screen and a backlight sheet. After laminating the backlight sheet and the segment code screen to form a segment code display screen, the previous segment code display screen is flipped over so that the front of the segment code screen faces upward, the segment code display screen is lit, and the positions of each first positioning mark and each second positioning mark on the segment code display screen are obtained; the displacement of the first preset point and the second preset point is determined according to the above positions, and the second angle between the first connecting line and the second connecting line is determined, and the sum of the displacement and the previous displacement compensation is used as the current displacement compensation, and the sum of the second angle and the previous compensation angle is used as the current compensation angle. After laminating to obtain the segment code display screen, the present invention also flips the segment code display screen to verify the laminating effect of the segment code display screen, and according to the verification result, determines the displacement compensation and compensation angle of the next laminating, so as to solve the problem of incomplete laminating overlap caused by light refraction.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic assembly of a backlight sheet and a segment code screen, and in particular to a method and a device for laminating and adjusting a segment code screen and a backlight sheet. Background Art

[0002] When producing segment code display screens, one of the important steps is to bond the segment code screen to the backlight sheet. There are multiple light-transmitting areas in the backlight sheet. When the two are bonded together, the light-transmitting area of ​​the backlight sheet corresponds to the liquid crystal area of ​​the segment code screen. For segment code display screens with relatively simple display effects, the light-transmitting area can be set larger than the liquid crystal area. In this case, when bonding the segment code screen to the backlight sheet, the segment code screen and the backlight sheet can be positioned by means of positioning blocks, and then the two can be bonded together to meet the assembly requirements of such segment code display screens.

[0003] However, with the demand for complex images displayed on segmented display screens, the transparent area of ​​the backlight sheet and the liquid crystal area of ​​the segmented screen have to be consistent in shape and size. This requires that after the segmented screen and the backlight sheet are bonded, the transparent area and the liquid crystal area are basically overlapped front and back, thus putting forward higher requirements on the bonding accuracy of the segmented screen and the backlight sheet. If the positioning block positioning bonding method is still used, the accuracy requirement cannot be met. Therefore, the inventor first proposed a method of shooting positioning marks to perform high-precision positioning of the backlight sheet and the segmented screen, and then grabbing the backlight sheet through a grabbing mechanism to automatically bond the backlight sheet and the segmented screen. However, after bonding, the backlight is on top and the segment code screen is on the bottom. When looking directly at the backlight, the positioning mark on the backlight basically coincides with the positioning mark on the segment code screen. However, in actual usage scenarios, the segment code screen is in front and the backlight is in the back. The user's normal viewing angle can directly see the segment code screen. Since the light first passes through the backlight and then through the segment code screen, the light is refracted. Therefore, at a normal viewing angle, the positioning mark on the backlight does not completely overlap with the positioning mark on the segment code screen, resulting in the segment code display screen failing to meet usage requirements. Summary of the invention

[0004] Based on the above situation, the main purpose of the present invention is to provide an automatic assembly method and automatic assembly device for a segment code screen and a backlight sheet. After the segment code display screen is bonded together, the segment code display screen is flipped over so that the front side of the segment code screen faces upward, and the bonding effect of the segment code display screen is verified. According to the verification result, the displacement compensation amount and compensation angle of the next bonding are determined to solve the problem of incomplete overlapping caused by light refraction.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] A method for automatically assembling a segment code screen and a backlight sheet, wherein the backlight sheet is provided with a first preset point and a first positioning mark as an end point of a first connecting line, and the segment code screen is provided with a second preset point corresponding to the first preset point, and a second positioning mark as an end point of a second connecting line and corresponding to each of the first positioning marks; the method for automatically assembling comprises the steps of:

[0007] S1100, placing the backlight sheet and the segment code screen on a placement platform with their backs facing upward, and determining the first mark coordinates and the second mark coordinates of each in a mechanical coordinate system by collecting images of the first positioning mark and the second positioning mark;

[0008] S1200, determining first preset coordinates and second preset coordinates of the first preset point and the second preset point in a mechanical coordinate system respectively according to the two first mark coordinates and the two second mark coordinates, and determining a first angle between the first connecting line and the second connecting line; determining a target coordinate according to the second preset coordinates and a displacement compensation amount, and determining a target rotation angle according to the first angle and a compensation angle;

[0009] S1300, translating and rotating the backlight sheet according to the first preset coordinates, the target coordinates, and the target rotation angle, so that the corresponding first positioning mark is aligned with the second positioning mark, and then moving the backlight sheet downward to make it fit on the back of the segment code screen to form a segment code display screen;

[0010] The initial values ​​of the displacement compensation amount and the compensation angle are both zero, and the current displacement compensation amount and compensation angle are obtained through the display screen formed last time, which specifically includes the compensation acquisition steps:

[0011] S2100, flipping the segment code display screen so that the front side of the segment code display screen faces upward, lighting up the segment code display screen, and obtaining the positions of each first positioning mark and each second positioning mark on the segment code display screen;

[0012] S2200, determining the displacement of the first preset point and the second preset point according to the above-mentioned positions, and determining the second angle between the first connecting line and the second connecting line, taking the sum of the displacement and the previous displacement compensation as the current displacement compensation, and taking the sum of the second angle and the previous compensation angle as the current compensation angle.

[0013] Preferably, in the compensation acquisition step, the step before step S2100 further includes the following steps:

[0014] S2000, determining whether the previous displacement is within a first preset range, and whether the previous second angle is within a second preset range. If both conditions are satisfied, the previous displacement compensation is used as the displacement compensation for each subsequent time, and the previous compensation angle is used as the compensation angle for each subsequent time, and the compensation acquisition step is no longer performed; otherwise, executing step S2100;

[0015] The initial value of the displacement and / or the second angle is a preset value, and the displacement is outside a first preset range, and the second angle is outside a second preset range.

[0016] Preferably, the first preset range is 0-0.05 mm; the second preset range is 0-0.05°.

[0017] Preferably, the compensation acquisition step is only performed within the initial, continuous preset number of automatic assemblies, and the last displacement compensation amount is used as the displacement compensation amount for each subsequent time, and the current compensation angle obtained for the last time is used as the compensation angle for each subsequent time.

[0018] Preferably, in step S2100, a first camera device shoots the segment code display screen from a fixed first shooting point on the upper side to obtain verification image information, and determines a first verification coordinate of the first positioning mark and a second verification coordinate of each second positioning mark on the verification image coordinate system, that is, the position of each first positioning mark and each second positioning mark;

[0019] In step S2200, the first preset verification coordinates and the second preset verification coordinates of the first preset point and the second preset point in the verification image coordinate system are determined according to the two first verification coordinates and the two second verification coordinates, and then the displacement is determined by combining the conversion coefficient between the pixels in the verification image information and the actual size of the display surface of the segment code display screen.

[0020] Preferably, a first limit block is provided on the placement platform, the first limit block defines the placement position of the segment code screen, and the first limit block has a first limit surface parallel to the X-axis of the mechanical coordinate system and a second limit surface parallel to the Y-axis of the mechanical coordinate system;

[0021] In step S2100, the segment code display screen is set at the segment code screen placement position, and the verification image coordinate system corresponding to the verification image information is established, the x-axis of the verification image coordinate system is parallel to the X-axis, and the y-axis of the verification image coordinate system is parallel to the Y-axis;

[0022] In step S2200, the value of the displacement on the X-axis is determined according to the difference between the first preset verification coordinate and the corresponding second preset verification coordinate on the x-axis and the conversion coefficient, and the value of the displacement on the Y-axis is determined according to the difference between the first preset verification coordinate and the corresponding second preset verification coordinate on the y-axis and the conversion coefficient. The value of the displacement on the X-axis and the value of the displacement on the Y-axis together constitute the displacement.

[0023] Preferably, the first preset point is the midpoint of the first connecting line; and the second preset point is the midpoint of the second connecting line.

[0024] Preferably, the placement platform is provided with a first limit block and a second limit block, the first limit block defines the placement position of the segment code screen, and the second limit block defines the placement position of the backlight sheet;

[0025] When the backlight sheet is placed at the backlight sheet placement position and the segment code screen is placed at the segment code screen placement position, there is a fixed shooting point directly above each of the first positioning mark and the second positioning mark, and each time step S1100 is executed, the second camera device collects images of each of the first positioning marks and each of the second positioning marks at the corresponding fixed shooting points.

[0026] The present invention also relates to an automatic assembly device for a segment code screen and a backlight sheet, which realizes the aforementioned automatic assembly method, and comprises a workspace, wherein a three-axis moving mechanism, a gripping mechanism, a second camera device and a placing platform are arranged in the workspace;

[0027] The placement platform is arranged at the lower part of the working space;

[0028] The gripping mechanism and the second camera device are mounted on the three-axis moving mechanism so as to be driven by the three-axis moving mechanism to move within the working space.

[0029] Preferably, the automatic assembly device further comprises a first photographic device, a backlight placement position and a segment code screen placement position are provided on the placement platform, and the first photographic device is fixed above the segment code screen placement position.

[0030]

Beneficial Effects

[0031] In the present invention, after the segment code display screen is bonded, the positions of the first positioning mark and the second positioning mark are obtained from the front of the segment code display screen, and the offset between the first preset point and the second preset point and the second angle between the first connecting line and the second connecting line are obtained accordingly. Therefore, when the next backlight sheet is bonded to the segment code screen, when the backlight sheet is moved to the upper side of the segment code screen, the displacement compensation amount corresponding to the offset is moved more, and when the angle of the backlight sheet is rotated to be consistent with the angle of the segment code screen, the compensation angle corresponding to the second angle is rotated more, and then the backlight sheet and the segment code screen are bonded. In this way, the problem of incomplete overlap when viewed from the front due to refraction of light is eliminated.

[0032] Other beneficial effects of the present invention will be explained in the specific implementation manner through the introduction of specific technical features and technical solutions. Through the introduction of these technical features and technical solutions, those skilled in the art should be able to understand the beneficial technical effects brought about by the technical features and technical solutions. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The following will describe a preferred embodiment of an automatic assembly method of a segment code screen and a backlight sheet of the present invention with reference to the accompanying drawings. In the drawings:

[0034] Figure 1 A flowchart of a preferred embodiment of an automatic assembly method of a segment code screen and a backlight sheet according to the present invention;

[0035] Figure 2 A flowchart of the steps for obtaining compensation. DETAILED DESCRIPTION

[0036] The present invention is described below based on embodiments, but the present invention is not limited to these embodiments. In the following detailed description of the present invention, some specific details are described in detail. In order to avoid confusing the essence of the present invention, known methods, processes, procedures, and components are not described in detail.

[0037] In addition, persons of ordinary skill in the art will appreciate that the drawings provided herein are for illustration purposes and are not necessarily drawn to scale.

[0038] Unless the context clearly requires otherwise, throughout the specification and claims, the words "include", "comprising" and similar words should be interpreted in an inclusive sense rather than an exclusive or exhaustive sense; that is, in the sense of "including but not limited to".

[0039] In the description of the present invention, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0040] See also Figure 1 and Figure 2 The present invention relates to an automatic assembly method of a segment code screen and a backlight sheet, which can realize automatic bonding of the backlight sheet and the segment code screen, and can inspect the bonding effect of the two, and adjust the subsequent automatic bonding process of the backlight sheet and the segment code screen according to the inspection result feedback, so as to improve the bonding accuracy of the backlight sheet and the segment code screen. The backlight sheet is provided with a first preset point and a first positioning mark as an end point of a first connecting line, and the segment code screen is provided with a second preset point corresponding to the first preset point, and a second positioning mark as an end point of the second connecting line and corresponding to each first positioning mark; the first preset point on the backlight sheet is a virtual point, and the first connecting line is a virtual point. It is a virtual straight line segment, the two endpoints of which are the first positioning marks, and the first preset point is fixed compared to the position of the two first positioning marks, that is, the position of the first preset point can be determined based on the two first positioning marks; similarly, the second preset point on the segment code screen is also a virtual point, and the second connecting line is a virtual straight line segment, the two endpoints of which are the second positioning marks, and the position of the second preset point can be determined based on the two second positioning marks; the first positioning mark and the second positioning mark can be light-transmitting areas, and the first positioning mark and the second positioning mark are illuminated by light, so that the positions of the two can be determined. In addition, if the backlight sheet and the segment code screen are bonded with the high precision, the two first positioning marks overlap with the two second positioning marks, and the first preset point overlaps with the second preset point, the segment code screen and the backlight sheet are bonded with the high precision by an automatic assembly method, and the automatic assembly method includes two major steps, the first major step is the bonding step, and the second major step is the compensation acquisition step.

[0041] The laminating step includes the following steps:

[0042] S1100, placing the backlight sheet and the segment code screen on a placement platform with their backs facing upward, and determining the first mark coordinates and the second mark coordinates of each in the mechanical coordinate system by collecting images of the first positioning mark and the second positioning mark.

[0043] S1200, determine the first preset coordinates and the second preset coordinates of the first preset point and the second preset coordinates of the second preset point in the mechanical coordinate system according to the two first mark coordinates and the two second mark coordinates, and determine the first angle between the first connecting line and the second connecting line; determine the target coordinates according to the second preset coordinates and the displacement compensation amount, and determine the target rotation angle according to the first angle and the compensation angle.

[0044] S1300, translating and rotating the backlight sheet according to the first preset coordinates, the target coordinates and the target rotation angle to align the corresponding first positioning mark with the second positioning mark, and then moving the backlight sheet downward to make it fit on the back of the segment code screen to form a segment code display screen.

[0045] The initial values ​​of the displacement compensation amount and the compensation angle are both zero, and the current displacement compensation amount and compensation angle are obtained through the display screen formed last time, which specifically includes the compensation acquisition steps:

[0046] S2100, flip the previous segment code display screen so that the front side of the segment code screen faces upward, light up the segment code display screen, and obtain the positions of each first positioning mark and each second positioning mark on the segment code display screen.

[0047] S2200, determining the displacement of the first preset point and the second preset point according to the above positions, and determining the second angle between the first connecting line and the second connecting line, taking the sum of the displacement and the previous displacement compensation as the current displacement compensation, and taking the sum of the second angle and the previous compensation angle as the current compensation angle.

[0048] The main purpose of the bonding step of the present invention is to realize automatic bonding of the backlight sheet and the segment code screen, which is realized based on an automatic assembly device. The automatic assembly device has a mechanical coordinate system, and the mechanical coordinate system is a three-dimensional coordinate system. The mechanical coordinate system has an X-axis, a Y-axis and a Z-axis, wherein the plane formed by the X-axis and the Y-axis is parallel to the horizontal plane, and the Z-axis is the vertical direction. After the backlight sheet and the segment code screen are placed on the placement platform, since the placement platform is horizontally arranged and the Z-axis position of the placement platform on the mechanical coordinate system is constant, that is, the positions of the backlight sheet and the segment code screen on the Z-axis are fixed, so the main purpose is to determine the values ​​of the two first positioning points and the two second positioning points on the X-axis and the Y-axis.

[0049] During the first bonding, in step S1100, the first positioning mark and the second positioning mark are photographed by a photographic device (a second photographic device) to obtain target image information, and according to the positions of the first positioning mark and the second positioning mark in the target image information, their coordinates in the mechanical coordinate system are determined (the specific determination method is described in detail below), thereby obtaining the first mark coordinates of the first positioning mark in the mechanical coordinate system and the second mark coordinates of the second positioning mark in the mechanical coordinate system.

[0050] In step S1200, since the positional relationship of the first preset positioning point relative to the two first positioning marks is fixed and the coordinates of the two first marks have been determined, the first preset coordinates of the first preset positioning point in the mechanical coordinate system (the position of the backlight film) can be determined according to the two first mark coordinates; similarly, the second preset coordinates of the second preset positioning point in the mechanical coordinate system (the position of the segment code screen) can be determined according to the two second mark coordinates; in addition, the angle between the first connecting line and the X-axis of the mechanical coordinate system (the backlight film placement angle) can be determined according to the two first mark coordinates, and the angle between the second connecting line and the X-axis of the mechanical coordinate system (the segment code screen placement angle) can be determined according to the two second mark coordinates.

[0051] Since the two first marker coordinates and the first preset coordinate have the same components on the Z axis, these three coordinates can be expressed as (X, Y); similarly, the two second marker coordinates and the second preset coordinate can also be expressed as (X, Y). For example, the two first marker coordinates are (X a1 , Y a1 ) and (X a2 , Y a2 ), determine the first preset coordinate (X) according to the two first marking coordinates a3 , Y a3 ); the coordinates of the two second markers are (X b1 , Y b1 ) and (X b2 , Y b2 ), determine the second preset coordinate (X) according to the two second marking coordinates b3 , Y b3 );

[0052] Backlight placement angle

[0053] Segment screen placement angle

[0054] Therefore, it can be obtained that the first angle θ between the first connecting line and the second connecting line is θ=β-α.

[0055] Of course, the backlight placement angle may also be the angle between the first connecting line and the Y axis of the mechanical coordinate system. In this case, the segment code screen placement angle is also the angle between the first connecting line and the Y axis of the mechanical coordinate system.

[0056] In step S1300, according to the first preset coordinate (X a3 , Y a3 ), in the mechanical coordinate system, the grabbing mechanism moves to the backlight grabbing coordinate (X a3 , Y a3 , Z1), at this time, the grabbing mechanism is located directly above the first preset positioning point, that is, the grabbing coordinate is higher than the first preset coordinate on the Z axis, and at the same time the grabbing mechanism can rotate, the rotation axis (axis) of the grabbing mechanism is parallel to the Z axis, and at this time the rotation axis of the grabbing mechanism passes through the first preset coordinate, the grabbing mechanism moves downward to contact the backlight sheet and grab the backlight sheet, and then the grabbing mechanism moves upward to separate the backlight sheet from the placement platform, and the grabbing mechanism rotates around its rotation axis by a first angle θ, so that the first connecting line also rotates by θ, so that the first connecting line is parallel to the second connecting line, according to the second preset coordinate (X b3 , Y b3 ), in the mechanical coordinate system, the gripping mechanism drives the backlight sheet to move to the backlight sheet fitting coordinate (X b3 , Y b3, Z2), at this time, the grabbing mechanism is located directly above the segment code screen, and the rotating shaft passes through the second preset coordinate, so the rotating shaft passes through the first preset positioning point and the second preset positioning point at the same time, that is, the first preset positioning point is located directly above the second preset positioning point, and the first connecting line is also parallel to the second connecting line, and the grabbing mechanism moves downward, so that when the backlight sheet and the segment code screen are bonded, the first preset positioning point coincides with the second preset positioning point, and the two first positioning marks coincide with the two second positioning marks, so that high-precision bonding is achieved between the backlight sheet and the segment code screen, and in the above process, the operator only needs to place the backlight sheet and the segment code screen on the placement platform respectively, so as to automatically position the first positioning mark and the second positioning mark, automatically grab the backlight sheet, and bond the backlight sheet and the segment code screen, thereby realizing automatic bonding of the backlight sheet and the segment code screen, reducing the labor intensity of the operator, and improving the yield rate of the bonding between the two, improving the consistency of the segment code display screen, and avoiding damage to the operator's eyes caused by strong light during bonding.

[0057] In the foregoing, Z1 and Z2 can be equal or unequal; the two first positioning marks are located at different positions of the backlight film, that is, the two first positioning marks will not be located at the same position of the backlight film; the two second positioning marks will not be located at the same position of the segment code screen, and the first preset positioning mark can be located at any position on the backlight film, and can even overlap with a first positioning mark.

[0058] The first positioning mark can be a circle, and the first mark coordinates are the coordinates of the center point of the first positioning mark in the mechanical coordinate system; in another embodiment, the first positioning mark is a cross-shaped structure, in which case the first mark coordinates are the coordinates of the cross intersection of the first positioning mark in the mechanical coordinate system. The first positioning mark has the same shape as the second positioning mark.

[0059] Although the backlight sheet and the segment code screen can be attached to obtain the first segment code display screen through the aforementioned steps S1100-S1300, the backs of the backlight sheet and the segment code screen face upward in the above process, and thus the back of the first segment code display screen faces upward. Even at this viewing angle, the light can only be seen by the operator after passing through the second positioning mark on the segment code screen and then the first positioning mark on the backlight sheet. Even at this viewing angle, the two first positioning marks coincide with the two second positioning marks. However, in actual use, the user will observe from the front of the first segment code display screen. At this time, the light first passes through the backlight sheet and then passes through the segment code screen. When the light passes through the junction of the backlight sheet and the segment code screen, refraction will occur, so that from the user's perspective, the first positioning mark and the second positioning mark do not completely overlap.

[0060] To this end, the present invention also includes a compensation acquisition step.

[0061] In step S2100, the first segment code display screen is turned over so that the front side of the segment code display screen faces upward, thereby simulating the normal use state of the segment code display screen, in which the positions of the first positioning marks and the second positioning marks on the segment code display screen are respectively obtained.

[0062] If the position of the first positioning mark is consistent with the position of the second positioning mark, it means that the first positioning mark and the second positioning mark overlap. In more cases, the first positioning mark and the second positioning mark are inconsistent, which means that the segment code display screen cannot meet the requirements.

[0063] In step S2200, the position of the first preset point is determined according to the positions of the two first positioning marks, the position of the second preset point is determined according to the positions of the two second positioning marks, and then the offset of the two is determined according to the positions of the first preset point and the second preset point. The angle of the first line relative to the X-axis can also be determined according to the positions of the two first positioning marks, and the angle of the second line relative to the X-axis can be determined according to the positions of the two second positioning marks, thereby determining the second angle between the first line and the second line on the segment code display screen.

[0064] At this time, the obtained offset is used as the displacement compensation amount, and the second angle is used as the compensation angle.

[0065] When the backlight sheet and the segment code screen are fitted for the second time, after obtaining the second preset coordinates and the first angle, the second preset coordinates are combined with the displacement compensation amount to obtain the target coordinates, and the first angle is combined with the compensation angle to obtain the target rotation angle; so that in the subsequent step S1300, the grasping mechanism grasps the backlight sheet and rotates the target rotation angle to eliminate the difference in the aforementioned second angle, and moves to the target coordinates to eliminate the difference in the aforementioned offset, and then the backlight sheet and the segment code screen are fitted to obtain a second segment code display screen, so that when the second segment code display screen is viewed from the front, the two first positioning marks coincide with the two second positioning marks, thereby meeting the factory requirements of the segment code display screen (depending on the actual situation).

[0066] Of course, for the second segment code display screen, steps S2100 and S2200 can be continued to obtain a new displacement and a new second angle; and the previous displacement compensation amount is added to the current displacement amount to obtain the current displacement compensation amount; and the previous compensation angle and the new second angle are added to obtain the current compensation angle.

[0067] Therefore, when the backlight sheet and the segment code screen are fitted for the third time, after obtaining the second preset coordinates and the first angle, the second preset coordinates are combined with the current displacement compensation amount (specifically the current displacement compensation amount of the previous segment) to obtain the target coordinates, and the first angle is combined with the current compensation angle (specifically the current compensation angle of the previous segment) to obtain the target rotation angle; so that in the subsequent step S1300, the grasping mechanism grasps the backlight sheet and rotates the target rotation angle to eliminate the difference in the aforementioned second angle, and moves to the target coordinates to eliminate the difference in the aforementioned offset, thereby further improving the display effect of the segment code display screen.

[0068] In this way, the compensation acquisition step is performed on each obtained segment code display screen, so as to adjust the bonding process of the backlight sheet and the segment code screen for the next time, so that when viewed from the front, the first positioning mark on the segment code display screen gradually and completely overlaps with the corresponding second positioning mark, so that the segment code display screen meets the factory requirements, and finally the displacement compensation amount and compensation angle used by the segment code display screen when meeting the factory requirements are used as the final displacement compensation amount and compensation angle, so that the segment code display screen obtained by each subsequent bonding meets the factory requirements, and there is no need to perform the compensation acquisition step again, thereby solving the problem of incomplete overlap between the backlight sheet and the segment code screen.

[0069] It should be noted that, on the segment code display screen, the reason why the first positioning mark and the second positioning mark do not completely overlap is not only due to the problem of light refraction, but the cumulative error of the automatic assembly device itself may also be one of the reasons. Regardless of the cause, the present invention obtains the displacement compensation amount and compensation angle through the compensation acquisition step, thereby solving the problem of incomplete overlap between the backlight sheet and the segment code screen.

[0070] In addition, when the backlight sheet is attached to the segment code screen for the first time, since there is no compensation acquisition step before that, there is no displacement compensation amount and compensation angle. Therefore, the second preset coordinate is the target coordinate, and the first angle is the target rotation angle.

[0071] Preferably, in the compensation acquisition step, the step before step S2100 also includes the following steps:

[0072] S2000, determining whether the previous displacement is within the first preset range, and whether the previous second angle is within the second preset range. If both conditions are satisfied, the previous displacement compensation is used as the displacement compensation for each subsequent time, and the previous compensation angle is used as the compensation angle for each subsequent time, and the compensation acquisition step is no longer performed; otherwise, executing step S2100;

[0073] The initial values ​​of the displacement and / or the second angle are preset values, the displacement is outside the first preset range, and the second angle is outside the second preset range.

[0074] First, the compensation acquisition step is performed on the segment code display screen, and the next bonding of the backlight sheet and the segment code screen is guided, so that the first positioning mark and the second positioning mark in the segment code display screen are gradually and completely overlapped (the overlap degree is getting higher and higher). When the overlap degree between the first positioning mark and the second positioning mark meets the factory requirements, the current displacement compensation amount at this time can be used as the displacement compensation amount for each subsequent time, and the current compensation angle at this time can be used as the compensation angle for each subsequent time.

[0075] Therefore, when executing the compensation acquisition step, step S2000 is first executed to determine whether the previous displacement compensation amount and compensation angle can be used as the compensation angle for each subsequent time.

[0076] For example, when the backlight sheet and the segment code screen were bonded together last time, the displacement compensation amount was (A1, B1), where A1 represents the amount on the X-axis, B1 represents the amount on the Y-axis, and the compensation angle is J1. Then, the compensation acquisition step is performed on the obtained segment code display screen to obtain the displacement amount (A2, B2) and the second angle J2. At this time, the current displacement compensation amount is (A1+A2, B1+B2), and the current compensation angle is J1+J2. Then, the current backlight sheet and the segment code screen are bonded together, and the displacement compensation amount is (A1+A2, B1+B2), and the compensation angle is J1+J2. The current segment code display screen is obtained, and then the compensation acquisition step is performed on the current segment code display screen. Step S20 is first performed. 00, determine whether the displacement amount (A2, B2) is within the first preset range, assuming that the first preset range is (A3, B3), if A2 is less than A3, and B2 is less than B3, then it is within the first preset range, otherwise it is not within the first preset range; also determine whether the second angle J2 is within the second preset range, assuming that the second preset range is J3, if J2 is less than J3, then it is within the second preset range, otherwise it is not within the second preset range, so as to determine whether the displacement compensation amount (A1+A2, B1+B2) can be used as the displacement compensation amount for each subsequent time, and whether the compensation angle J1+J2 can be used as the compensation angle for each subsequent time, so as to obtain the final displacement compensation amount and compensation angle as soon as possible.

[0077] In addition, since there is no displacement and second angle after the backlight sheet and the segment code screen are bonded together for the first time, at this time, at least one of the displacement and the second angle is set to a preset value, so that the displacement exceeds the first preset range, or the second angle exceeds the second preset range, so that the segment code display screen obtained by the first bonding must execute step S2100 and step S2200.

[0078] In addition, step S2000 may be omitted, and instead there may be step S2300 after step S2200 to determine whether the currently obtained displacement is within the first preset range, and whether the currently obtained second angle is within the second preset range. If both conditions are met, the current displacement compensation amount is used as the displacement compensation amount for each subsequent time, and the current compensation angle is used as the compensation angle for each subsequent time, and the compensation acquisition step will no longer be executed; otherwise, step S2100 is executed.

[0079] The first preset range is 0-0.05 mm, and the second preset range is 0-0.05°. Taking the displacement (A2, B2) as an example, if the absolute values ​​of A2 and B2 are both less than 0.05 mm, it means that the displacement (A2, B2) is within the first preset range; taking the second angle J2 as an example, if the absolute value of J2 is less than 0.05°, it means that the second angle J2 is within the second preset range.

[0080] Of course, the displacement can also be determined by the scalar value of the displacement being within the first preset range. Taking the displacement (A2, B2) as an example, the scalar value is If the scalar value is less than 0.05 mm, it means that the displacement (A2, B2) is within the first preset range.

[0081] In another embodiment, the compensation acquisition step is only performed within the initial, continuous preset number of automatic assembly times, and the last displacement compensation amount is used as the displacement compensation amount for each subsequent time, and the current compensation angle obtained at the last time is used as the compensation angle for each subsequent time.

[0082] For example, the compensation acquisition step is only performed when the backlight sheet and the segment code screen are attached for the first five times, and the current displacement compensation amount obtained by the fifth execution of the compensation acquisition step is used as the displacement compensation amount for each subsequent time, and the current compensation angle obtained for the fifth time is used as the compensation angle for each subsequent time.

[0083] By fitting the backlight sheet to the segment code screen for a limited number of times, the final displacement compensation amount and compensation angle are determined, which can meet the subsequent requirement that the first positioning mark and the second positioning mark on the segment code display screen completely overlap.

[0084] In actual application, in the present invention, when the backlight sheet and the segment code screen are bonded for the first time, the first mark coordinates and the second mark coordinates can be determined with high precision in step S1100, so that the backlight sheet and the segment code screen can be bonded with high precision in step S1300. On the resulting segment code display screen, the first positioning mark and the second positioning mark are basically completely overlapped when viewed from the front. Therefore, under normal circumstances, only 2-3 compensation acquisition steps need to be performed, and the current displacement compensation amount and the current compensation angle obtained can be used as the final displacement compensation amount and the compensation angle.

[0085] The preset number of automatic assembly times is 3-10 times, for example, 3 times, 5 times, 7 times, 8 times or 10 times.

[0086] Preferably, in step S2100, a first camera device shoots the segment code display screen from a fixed first shooting point on the upper side to obtain verification image information, and determines a first verification coordinate of the first positioning mark and a second verification coordinate of each second positioning mark on the verification image coordinate system, that is, the position of each first positioning mark and each second positioning mark;

[0087] In step S2200, the first preset verification coordinates and the second preset verification coordinates of the first preset point and the second preset point in the verification image coordinate system are determined according to the two first verification coordinates and the two second verification coordinates, and then the displacement is determined by combining the conversion coefficient between the pixels in the verification image information and the actual size of the display surface of the segment code display screen.

[0088] In step S2100, the first camera device is fixedly set and its shooting range is fixed. After shooting the segment code display screen, verification image information is obtained, and a verification image coordinate system is established to determine the coordinates of the two first positioning marks and the two second positioning marks photographed in the verification image coordinate system, thereby obtaining two first verification coordinates and two second verification coordinates.

[0089] It should be noted that the two first positioning marks and the two second positioning marks are on the same verification image information, so the first verification coordinates and the second verification coordinates are on the same verification image coordinate system, which facilitates the subsequent determination of the first preset verification coordinates, the second preset verification coordinates and the second angle in step S2200.

[0090] In step S2200, the first preset verification coordinates (x1, y1) of the first preset point in the verification image coordinate system are determined according to the two first verification coordinates, and the second preset verification coordinates (x2, y2) of the second preset point in the verification image coordinate system are determined according to the two second verification coordinates, and the deviation (x3, y3) between the first and second preset verification coordinates, wherein x3 = x2-x1, y3 = y2-y1, and the deviation is in the verification image coordinate system, and the deviation needs to be converted to the display surface of the segment code display screen, so it is also necessary to determine the conversion coefficient k between the pixels in the verification image information and the actual size of the display surface of the segment code display screen 验 , so the displacement is (x3*k 验 ,y3*k 验 ).

[0091] For the conversion factor k 验, a ruler can be placed on the display surface of the segment code display screen, and the length direction of the ruler is parallel to the x-axis or y-axis. A second camera is also used to take a picture to obtain the verification image information, and the number of pixels B occupied by the length A of the ruler is determined, k 验 =A / B. Conversion coefficient k 验 It never changes and you only need to do it once.

[0092] The confirmation of the second angle can be obtained by referring to the method of obtaining the first angle, which will not be repeated here.

[0093] In another optional embodiment, the position of the first positioning mark and the position of the second positioning mark can be determined on the front side of the segment code display screen by actual measurement (manual hand-drawing), and the position of the first preset point and the position of the second preset point can be determined accordingly, thereby determining the displacement and the second angle.

[0094] Furthermore, a first limit block is provided on the placement platform, and the first limit block defines the placement position of the segment code screen, and the first limit block has a first limit surface parallel to the X-axis of the mechanical coordinate system and a second limit surface parallel to the Y-axis of the mechanical coordinate system. When the segment code screen is placed at the segment code screen placement position, one side of the segment code screen fits with the first limit surface, so that the side of the segment code screen is parallel to the X-axis, and the other side of the segment code screen fits with the second limit surface, so that the side of the segment code screen is parallel to the Y-axis.

[0095] In step S2100, the segment code display screen is set at the segment code screen placement position, and a verification image coordinate system corresponding to the verification image information is established, the x-axis of the verification image coordinate system is parallel to the X-axis, and the y-axis of the verification image coordinate system is parallel to the Y-axis.

[0096] In step S2200, the value of the displacement on the X-axis is determined according to the difference between the first preset verification coordinate and the corresponding second preset verification coordinate on the x-axis and the conversion coefficient, and the value of the displacement on the Y-axis is determined according to the difference between the first preset verification coordinate and the corresponding second preset verification coordinate on the y-axis and the conversion coefficient. The value of the displacement on the X-axis and the value of the displacement on the Y-axis together constitute the displacement.

[0097] The outer contour of the segment code display screen is consistent with the outer contour of the segment code screen. Therefore, when the segment code display screen is set at the segment code screen placement position, the first limiting surface and the second limiting surface will limit the segment code display screen, so that one side of the segment code display screen (segment code screen) is parallel to the X axis, and the other side is parallel to the Y axis, while the x axis of the verification image coordinate system is parallel to the X axis, and the y axis is parallel to the Y axis, so that in step S2200, the deviation of the two preset verification coordinates on the x axis can be directly converted into the value of the displacement on the X axis, and the deviation on the y axis can be directly converted into the value of the displacement on the Y axis. The method of converting the deviation into the displacement is simplified.

[0098] Of course, the x-axis of the verification image coordinate system has an angle with the X-axis, and the y-axis has an angle with the Y-axis. When converting the deviation into displacement, the angle must be taken into account, which will not be elaborated here.

[0099] The first preset point is the midpoint of the first connecting line; the second preset point is the midpoint of the second connecting line. The first positioning mark is set to the midpoint of the two first preset positioning marks. The first preset positioning coordinates can be easily determined according to the coordinates of the two first marks. When the coordinates of the two first marks are (X a1 , Y a1 ) and (X a2 , Y a2 ), the first preset positioning coordinate (X a3 , Y a3 ) is determined as follows:

[0100]

[0101]

[0102] Similarly, the coordinates of the second marker are (X b1 , Y b1 ) and (X b2 , Y b2 ), the second preset positioning coordinate (X b3 , Y b3 ) is determined as follows:

[0103]

[0104]

[0105] Similarly, the first preset verification coordinates may be determined according to the two first verification coordinates, and the second preset verification coordinates may be determined according to the two second verification coordinates.

[0106] In addition, in step S2100, the first limiting block roughly positions the segment code display screen, that is, one side of the segment code screen is in contact with the first limiting surface, which can only make this side of the segment code screen nearly parallel to the X-axis, and the other side of the segment code screen is in contact with the second limiting surface, which makes this side of the segment code screen nearly parallel to the Y-axis, resulting in the need to perform the compensation acquisition step multiple times in succession to make the first positioning mark and the second positioning mark gradually and completely overlap.

[0107] A first limiting block and a second limiting block are provided on the placement platform. The first limiting block defines the placement position of the segment code screen, and the second limiting block defines the placement position of the backlight sheet.

[0108] When the backlight sheet is placed at the backlight sheet placement position and the segment code screen is placed at the segment code screen placement position, there is a fixed shooting point directly above each first positioning mark and the second positioning mark. Each time step S1100 is executed, the second camera device collects images of each first positioning mark and each second positioning mark at the corresponding fixed shooting point (the target image information described below).

[0109] When the segment code screen is placed at the segment code screen placement position, the first limit block can roughly position the segment code screen, so that each second positioning mark on the segment code screen is basically located in a specific, small first area of ​​the segment code screen placement position; similarly, the second limit block can roughly position the backlight film, so that each first positioning mark on the backlight film is basically located in a specific, small second area of ​​the backlight film placement position; a fixed shooting point is provided directly above the two first areas, and a fixed shooting point is provided directly above the two second areas, so that when the segment code screen is placed at the segment code screen placement position and the backlight film is placed at the backlight film placement position, there is a fixed shooting point directly above each first positioning mark, and there is also a fixed shooting point directly above each second positioning mark. The fixed shooting points are virtual points, and their coordinates in the mechanical coordinate system are fixed.

[0110] Taking a segment code screen placement position and a backlight placement position as an example, four fixed shooting points are set in the mechanical coordinate system. After the backlight is placed at the backlight placement position and the segment code screen is placed at the segment code screen placement position, since the backlight and the segment code screen are both roughly positioned, there is a fixed shooting point directly above each first positioning mark and there is a fixed shooting point directly above each second positioning mark.

[0111] In step S1100, the second camera device photographs the corresponding positioning mark directly below it at each fixed shooting point to obtain target image information. That is to say, there is only one positioning mark in the target image information, that is, only the photographed positioning mark can be located. Therefore, in this embodiment, the second camera device must photograph the positioning mark directly below it at four fixed shooting points respectively to obtain four target image information, so that the four positioning marks can be positioned on the mechanical coordinate system respectively.

[0112] In this way, each positioning mark is photographed separately to obtain corresponding target image information, which can improve the accuracy of the mark coordinates of the positioning mark on the mechanical coordinate system.

[0113] In the present invention, when the second camera device photographs the positioning mark, the camera device is located at the corresponding fixed shooting point, so that the camera device is located directly above the positioning mark, so that in the obtained target image information, the image of the positioning mark is basically located in the middle of the target image information, which improves the recognition of the image of the positioning mark. In addition, the deformation degree of the partial information located in the middle area of ​​the target image information is very small (the size of the mechanical coordinate system corresponding to the partial pixels in the middle area is consistent, and the size of the mechanical coordinate system corresponding to the partial pixels farther away from the middle area tends to become larger. The middle area is circular or rectangular, and the center point of the middle area is consistent with the center point of the image information. The area of ​​the middle area is 0.05-0.15 of the area of ​​the image information). In this way, no matter which positioning mark is photographed, in the obtained target image information, the image of the positioning mark is located in the middle area of ​​the target image information. In this way, the coordinates of the image of the positioning mark in the target image information can be obtained with high precision, thereby improving the positioning accuracy of the positioning mark on the mechanical coordinate system.

[0114] Taking the determination of the mark coordinates of a positioning mark on the mechanical coordinate system as an example, the positioning mark is photographed at the corresponding fixed shooting point to obtain the target image information, the target image coordinate system corresponding to the target image information is established, and the target pixel coordinates (x4, y4) of the positioning mark image (corresponding to the positioning mark) in the target image information in the target image coordinate system are determined. The mechanical coordinate system is provided with standard positioning coordinates (X0, Y0), and the target image coordinate system is provided with standard pixel coordinates (x0, y0) corresponding to the standard positioning coordinates. The X-axis of the mechanical coordinate system is parallel to the x-axis of the image coordinate system, and the positive directions of the two are consistent. The Y-axis is parallel to the y-axis, and the positive directions of the two are consistent.

[0115] The mark coordinates (X4, Y4) of the positioning mark in the mechanical coordinate system are determined according to the target pixel coordinates (x4, y4) and the comparison relationship; the comparison relationship satisfies:

[0116] X4=X0+(x4-x0)*k;

[0117] Y4=Y0+(y4-y0)*k;

[0118] Wherein, k is the conversion coefficient between the image coordinate system and the mechanical coordinate system.

[0119] The conversion factor k can refer to the above conversion factor k 验 The confirmation method is used to determine the result, which will not be described in detail here.

[0120] The standard positioning coordinates and the corresponding standard pixel coordinates may be determined by using a position determination method, including the steps of:

[0121] S100, placing a standard component (backlight or segment code screen) at a corresponding placement position; a second camera device collects image information of a corresponding positioning mark at a fixed shooting point, and determines the standard pixel coordinates (x0, y0) of the positioning mark in the image information.

[0122] S200, move the grasping mechanism so that it is located directly above the photographed positioning mark, and determine the standard positioning coordinates (X0, Y0) of the grasping mechanism in the mechanical coordinate system.

[0123] The standard positioning coordinates and the standard pixel coordinates both point to the same positioning mark, thereby establishing a connection between the target image coordinate system and the mechanical coordinate system, so that any pixel point on the target image coordinate system can be converted into the mechanical coordinate.

[0124] In step S200, a positioning rod may be installed on the grasping mechanism, and the axis of the positioning rod is colinear with the rotating shaft, so it is only necessary to ensure that the lower end of the positioning rod is located directly above the positioning mark. At this time, the coordinates of the grasping mechanism are the standard positioning coordinates.

[0125] Each fixed shooting point may be fixedly installed with a second camera device; in another optional embodiment, the number of the second camera device is one, which can be moved freely, so that the second camera device can be moved to each fixed shooting point.

[0126] In the present invention, the first camera device and the second camera device are different camera devices, and the main difference is that the shooting range of the first camera device is larger than the shooting range of the second camera device, so that the verification image information captured by the first camera device can include all the first positioning marks and the second positioning marks, and the target image information captured by the second camera device only includes one positioning mark, so that the positioning mark can be accurately located.

[0127] The present invention also relates to an automatic assembly device for a segment code screen and a backlight film, which can realize the aforementioned automatic assembly method, including a workspace, in which a three-axis moving mechanism, a gripping mechanism, a second camera device and a placing platform are provided; the placing platform is arranged at the lower part of the workspace; the gripping mechanism and the second camera device are installed on the three-axis moving mechanism, so as to drive the two to move in the workspace through the three-axis moving mechanism.

[0128] The backlight sheet and the segment code screen are photographed respectively by a second camera, and the first preset coordinates (backlight sheet position) are determined according to the two first mark coordinates, the second preset coordinates (segment code screen position) are determined according to the two second mark coordinates, and the first angle between the two is determined according to the first connecting line and the second connecting line. In this way, the grasping mechanism can grasp the backlight sheet with high precision, and move the backlight sheet to the top of the segment code screen with high precision, and can also adjust the rotation of the backlight sheet, so that the backlight sheet and the segment code screen can be fitted with high precision. The present invention can improve the yield rate of the fitting of the backlight sheet and the segment code screen, and realize automatic fitting, improve the fitting efficiency, improve the consistency of the segment code display screen, and can avoid damage to the eyes of the operator caused by strong light.

[0129] Furthermore, the automatic assembly device also includes a first camera device, and a backlight placement position and a segment code screen placement position are provided on the placement platform, and the first camera device is fixed above the segment code screen placement position.

[0130] In the present invention, after the segment code display screen is bonded, the positions of the first positioning mark and the second positioning mark are obtained from the front of the segment code display screen, and the offset between the first preset point and the second preset point and the second angle between the first connecting line and the second connecting line are obtained accordingly. Therefore, when the next backlight sheet is bonded to the segment code screen, when the backlight sheet is moved to the upper side of the segment code screen, the displacement compensation amount corresponding to the offset is moved more, and when the angle of the backlight sheet is rotated to be consistent with the angle of the segment code screen, the compensation angle corresponding to the second angle is rotated more, and then the backlight sheet and the segment code screen are bonded. In this way, the problem of incomplete overlap when viewed from the front due to refraction of light is eliminated.

[0131] It should be noted that the use of step numbers (letters or numbers) to refer to certain specific method steps in the present invention is only for the purpose of convenience and brevity of description, and is by no means intended to limit the order of these method steps by letters or numbers. Those skilled in the art will understand that the order of the relevant method steps should be determined by the technology itself and should not be inappropriately limited by the existence of step numbers. Those skilled in the art can determine various permissible and reasonable step orders based on the technology itself.

[0132] Those skilled in the art will appreciate that, without conflict, the above-mentioned preferred solutions can be freely combined and superimposed.

[0133] It should be understood that the above-mentioned embodiments are merely illustrative and not restrictive. Without departing from the basic principles of the present invention, various obvious or equivalent modifications or substitutions that can be made by those skilled in the art to the above-mentioned details will all be included in the scope of the claims of the present invention.

Claims

1. An automatic assembly method of a segment code screen and a backlight sheet, characterized in that: The backlight sheet is provided with a first preset point and a first positioning mark as an end point of a first connecting line, the segment code screen is provided with a second preset point corresponding to the first preset point, and a second positioning mark as an end point of a second connecting line and corresponding to each of the first positioning marks; the automatic assembly method comprises the steps of: S1100, placing the backlight sheet and the segment code screen on a placement platform with their backs facing upward, and determining the first mark coordinates and the second mark coordinates of each in a mechanical coordinate system by collecting images of the first positioning mark and the second positioning mark; S1200, determining first preset coordinates and second preset coordinates of the first preset point and the second preset point in a mechanical coordinate system respectively according to the two first mark coordinates and the two second mark coordinates, and determining a first angle between the first connecting line and the second connecting line; determining a target coordinate according to the second preset coordinates and a displacement compensation amount, and determining a target rotation angle according to the first angle and a compensation angle; S1300, translating and rotating the backlight sheet according to the first preset coordinates, the target coordinates, and the target rotation angle, so that the corresponding first positioning mark is aligned with the second positioning mark, and then moving the backlight sheet downward to make it fit on the back of the segment code screen to form a segment code display screen; The initial values ​​of the displacement compensation amount and the compensation angle are both zero, and the current displacement compensation amount and compensation angle are obtained through the display screen formed last time, which specifically includes the compensation acquisition steps: S2100, flipping the segment code display screen so that the front side of the segment code display screen faces upward, lighting up the segment code display screen, and obtaining the positions of each first positioning mark and each second positioning mark on the segment code display screen; S2200, determining the displacement of the first preset point and the second preset point according to the positions of each of the first positioning marks and each of the second positioning marks, and determining the second angle between the first connecting line and the second connecting line, taking the sum of the displacement and the previous displacement compensation as the current displacement compensation, and taking the sum of the second angle and the previous compensation angle as the current compensation angle; The compensation acquisition step is only performed within the initial, continuous preset number of automatic assemblies, and the last displacement compensation amount is used as the displacement compensation amount for each subsequent time, and the current compensation angle obtained at the last time is used as the compensation angle for each subsequent time; The first preset point is the midpoint of the first connecting line; the second preset point is the midpoint of the second connecting line.

2. The automatic assembly method according to claim 1, characterized in that: In the compensation acquisition step, the step before step S2100 also includes the following steps: S2000, determining whether the previous displacement is within a first preset range, and whether the previous second angle is within a second preset range. If both conditions are satisfied, the previous displacement compensation is used as the displacement compensation for each subsequent time, and the previous compensation angle is used as the compensation angle for each subsequent time, and the compensation acquisition step is no longer performed; otherwise, executing step S2100; The initial value of the displacement and / or the second angle is a preset value, and the displacement is outside a first preset range, and the second angle is outside a second preset range.

3. The automatic assembly method according to claim 2, characterized in that: The first preset range is 0-0.05 mm; the second preset range is 0-0.05°.

4. The automatic assembly method according to claim 1, characterized in that: In step S2100, the first camera device shoots the segment code display screen from a fixed first shooting point on the upper side to obtain verification image information, and determines the first verification coordinates of the first positioning mark and the second verification coordinates of each of the second positioning marks in the verification image coordinate system, that is, the positions of each of the first positioning marks and each of the second positioning marks; In step S2200, the first preset verification coordinates and the second preset verification coordinates of the first preset point and the second preset point in the verification image coordinate system are determined according to the two first verification coordinates and the two second verification coordinates, and then the displacement is determined by combining the conversion coefficient between the pixels in the verification image information and the actual size of the display surface of the segment code display screen.

5. The automatic assembly method according to claim 4, characterized in that: A first limit block is provided on the placement platform, the first limit block defines the placement position of the segment code screen, and the first limit block has a first limit surface parallel to the X-axis of the mechanical coordinate system and a second limit surface parallel to the Y-axis of the mechanical coordinate system; In step S2100, the segment code display screen is set at the segment code screen placement position, and the verification image coordinate system corresponding to the verification image information is established, the x-axis of the verification image coordinate system is parallel to the X-axis, and the y-axis of the verification image coordinate system is parallel to the Y-axis; In step S2200, the value of the displacement on the X-axis is determined according to the difference between the first preset verification coordinate and the corresponding second preset verification coordinate on the x-axis and the conversion coefficient, and the value of the displacement on the Y-axis is determined according to the difference between the first preset verification coordinate and the corresponding second preset verification coordinate on the y-axis and the conversion coefficient. The value of the displacement on the X-axis and the value of the displacement on the Y-axis together constitute the displacement.

6. The automatic assembly method according to any one of claims 1 to 5, characterized in that: The placement platform is provided with a first limit block and a second limit block, the first limit block defines the placement position of the segment code screen, and the second limit block defines the placement position of the backlight sheet; When the backlight sheet is placed at the backlight sheet placement position and the segment code screen is placed at the segment code screen placement position, there is a fixed shooting point directly above each of the first positioning mark and the second positioning mark, and each time step S1100 is executed, the second camera device collects images of each of the first positioning marks and each of the second positioning marks at the corresponding fixed shooting points.

7. An automatic assembly device for a segment code screen and a backlight sheet, characterized in that: Implementing the automatic assembly method according to any one of claims 1 to 6, comprising a workspace, wherein the workspace is provided with a three-axis moving mechanism, a gripping mechanism, a second camera device and a placement platform; The placement platform is arranged at the lower part of the working space; The gripping mechanism and the second camera device are mounted on the three-axis moving mechanism so as to be driven by the three-axis moving mechanism to move within the working space.

8. The automatic assembly device according to claim 7, characterized in that: It also includes a first camera device. The placement platform is provided with a backlight placement position and a segment code screen placement position. The first camera device is fixed above the segment code screen placement position.

Images