CN109761057B - Alignment correction system and alignment correction method for light guide plate - Google Patents
Alignment correction system and alignment correction method for light guide plate Download PDFInfo
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- CN109761057B CN109761057B CN201910035975.0A CN201910035975A CN109761057B CN 109761057 B CN109761057 B CN 109761057B CN 201910035975 A CN201910035975 A CN 201910035975A CN 109761057 B CN109761057 B CN 109761057B
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Abstract
The invention discloses an alignment correction system and an alignment correction method of a light guide plate, the system comprises a moving device provided with at least two detection components, a processing unit which is in signal connection with the detection components and obtains a plurality of offset signals, a correction platform provided with a placing carrier plate and a displacement motor and a bearing platform, wherein the displacement motor moves and rotates according to deviation correction signals and stacking offset vectors before the light guide plate is placed on the placing carrier plate, so that the light guide plate is sequentially aligned and stacked on the placing carrier plate to form a light guide plate processing group, the alignment correction method comprises the steps of collecting the deviation correction signals and the stacking offset vectors and correcting through the collection of the deviation correction signals and the stacking offset vectors, the alignment correction system and the alignment correction method of the light guide plate eliminate the problem of inertial offset generated after the light guide plate is stacked into a group by re-correction, and the alignment accuracy of the light guide plate stacking, the stacked light guide plate is easier to polish, and the processed light guide plate has better yield.
Description
Technical Field
The invention relates to the field of light guide plate manufacturing process, in particular to an alignment correction system and an alignment correction method of a light guide plate.
Background
The light guide plate is an optical component applied to various display devices, and is generally used in combination with a light source, and the component is often called as a backlight module. The light guide plate is mostly manufactured by printing, injection molding or rolling. The printing is that a printing material made of a high-divergence light source substance is utilized to form microstructure dots on a plate in a screen printing mode, so that the plate can destroy the total reflection of light rays to form light emission, and the light guide effect is achieved. The injection molding is to make the microstructure dots on an injection molding mold, and then inject plastic into the mold to form the board body with the microstructure dots.
However, the light guide plate manufactured by injection molding has a structure thickness of about 0.7 to 3mm, but with the market trend, the thickness of the backlight module must be reduced to make the display device equipped with the backlight module lighter and thinner, and thus the conventional injection molding method for manufacturing the light guide plate is not applied. On the other hand, in addition to the requirement of low thickness, the panel size of the display device is also increased, so the area size of the light guide plate used in combination is also required to be enlarged, and the injection molding manufacturing process cannot meet the requirement of large-size production. Accordingly, manufacturers of light guide plates have applied a rolling process to manufacture ultra-thin large-sized light guide plates.
After the light guide plate is basically formed, in view of specific optical requirements, other related processes may need to be performed again, and in order to increase the overall process rate, an alignment correction system and an application method for the light guide plate are used, so that the light guide plate can correct the offset generated in the moving and stacking processes of the light guide plate in an automatic manner, and perform subsequent processes. However, in the actual process, the light guide plates still shift after being stacked in batches, which is unavoidable especially in the process of producing large-sized light guide plate products. Therefore, in order to improve the stacking accuracy of the light guide plate and further improve the yield of the processed light guide plate, the present inventors have conceived and proposed an alignment correction application method of the light guide plate and an alignment correction system of the light guide plate to effectively solve the offset phenomenon in the stacking process of the existing light guide plate.
Disclosure of Invention
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
In the present invention, the above-mentioned preferred conditions can be arbitrarily combined on the basis of common knowledge in the field, so as to obtain each preferred embodiment of the present invention.
The invention provides a contraposition correction system of a light guide plate, which is characterized by comprising a mobile device, a processing unit and a correction platform;
the mobile device is provided with at least two detection components, and when the mobile device moves any one light guide plate, the detection components acquire a plurality of offset signals;
the processing unit is in signal connection with the detection assembly and obtains the plurality of offset signals so as to calculate the offset of the light guide plate according to the offset signals and generate a deviation correcting signal;
the correcting platform is used for bearing the light guide plate and is arranged on one side of the moving device, the correcting platform is provided with a placing carrier plate and a displacement motor for driving the placing carrier plate, and the displacement motor moves and rotates according to the deviation correcting signal before any light guide plate is placed on the placing carrier plate, so that the light guide plates are sequentially aligned and stacked on the placing carrier plate to form the light guide plate processing group;
the alignment correction system of the light guide plate also comprises a bearing platform arranged on one side of the correction platform and used for bearing the stacked light guide plate processing set for polishing, and after polishing, the correction platform receives backThe shift motor drives the carrier plate to move and rotate according to the deviation-correcting signal and the stacking offset vector to receive the light guide plates moved by the moving device and stack the light guide plates to form a new light guide plate processing set, wherein the stacking offset vector is
The offset of the light guide plate at the top side and the edge of the light guide plate at the bottom side in an x-Y axis coordinate system is (delta d1, delta d2), and the total number of the light guide plate processing groups is N.
The alignment correction system of the light guide plate further comprises a gantry translation device, wherein the gantry translation device is arranged between the bearing platform and the correction platform and is used for moving the light guide plate processing set to a fixed distance to the bearing platform.
The gantry translation device comprises a mechanical arm used for moving the light guide plate processing set.
The mechanical arm is further provided with a plurality of suckers, and the suckers translate the light guide plate processing set in an adsorption mode.
The bearing platform is provided with a measuring device which is in signal connection with the correcting platform so as to measure the polished light guide plate processing group to obtain the stacking offset vector and transmit the stacking offset vector to the correcting platform.
The invention also provides an alignment correction method of the light guide plate, which is characterized in that any alignment correction system of the light guide plate is adopted, and the method comprises the following steps:
step S10: moving a plurality of light guide plates by the moving device and stacking the light guide plates to enable the light guide plates to be stacked to form a light guide plate processing set, wherein the moving device is provided with at least two detection assemblies;
step S11: driving the mobile device to move any light guide plate to the correction platform, and simultaneously detecting the position of the light guide plate by the detection component to obtain a plurality of offset signals, wherein the correction platform is provided with a placement carrier plate and a displacement motor for driving the placement carrier plate;
step S12: after obtaining the offset signal, the detecting component transmits the offset signal to the processing unit, and the processing unit calculates the offset of the light guide plate according to the offset signal and generates a deviation correcting signal;
step S13: before the light guide plate is placed on the placing carrier plate, the displacement motor drives the placing carrier plate to move and rotate according to the deviation correcting signal;
step S14: the mobile device places the light guide plate on the placement carrier plate after displacement and rotation;
step S15: repeatedly moving the light guide plates by using the moving device until the light guide plates are sequentially aligned and stacked on the placing carrier plate, thereby forming a light guide plate processing group;
step S20: moving the light guide plate processing set to the bearing platform for polishing;
step S21: after the polishing process is completed, the light guide plate processing group is detected to obtain a stacking offset vector
The relative offset between the edges of the light guide plate at the top side and the light guide plate at the bottom side in an X-Y axis coordinate system is (delta d1, delta d2), and the total number of the light guide plate processing groups is N;
step S22: the stack offset vector is transmitted back to the calibration platform, so that the subsequent light guide plate is placed before the carrier plate is placed, the displacement motor drives the carrier plate to move and rotate according to the deviation correction signal obtained in step S12 and the stack offset vector obtained in step S21, so as to receive the light guide plates moved by the moving device, and stack the light guide plates to form a new light guide plate processing set.
In steps S10-S15, each light guide plate is provided with at least two alignment marks, the detection components provided on the mobile device are respectively preset with a reference coordinate when the mobile device is installed, and the detection components detect the vectors between the alignment marks and the reference coordinates when the mobile device moves any light guide plate to the calibration platform, so as to obtain the offset signal.
The positive progress effects of the invention are as follows: the alignment correction system and the alignment correction method of the light guide plate provided by the invention can effectively eliminate the problem of inertial deviation generated after the light guide plates are stacked into a group through secondary correction, greatly improve the alignment accuracy of the stacked light guide plates, and enable the stacked light guide plates to be easier to polish and process and the processed light guide plates to have better product yield. Because different specifications of light guide plates can generate different inertial migration phenomena after being stacked to form a light guide plate processing set, the light guide plate processing sets of different scales still need to be detected and corrected by the method and the system of the invention aiming at the light guide plates of various product specifications, and then are transmitted back to the correction platform to correct the offset of the subsequently stacked light guide plates, so that the later stacked light guide plates can not generate the inertial migration. The bearing platform is provided with a measuring device to directly detect the polished light guide plate processing group, so that the measuring speed and the accuracy of the stacking offset vector are further improved. In addition, a gantry moving device may be used as a mechanism for moving the light guide plate processing group, and the light guide plate processing group may be stably moved by a robot arm in an adsorption manner.
Drawings
FIG. 1 is a schematic diagram (A) illustrating an alignment calibration system of a light guide plate according to a preferred embodiment of the present invention.
FIG. 2 is a schematic diagram (II) illustrating an alignment calibration system of a light guide plate according to a preferred embodiment of the present invention.
FIG. 3 is a schematic diagram (III) illustrating an alignment calibration system of a light guide plate according to a preferred embodiment of the present invention.
FIG. 4 is a schematic view illustrating a state of an alignment calibration system of a light guide plate according to another preferred embodiment of the present invention.
FIG. 5 is a flowchart illustrating the steps of a preferred embodiment of the alignment correction method for a light guide plate according to the present invention
Description of reference numerals:
1: alignment correction system of light guide plate
10: mobile device
101: detecting assembly
11: correcting platform
111: place support plate
112: displacement motor
12: processing unit
20: bearing platform
201: measuring device
2011: image acquisition assembly
2012: lighting assembly
21: gantry translation device
211: mechanical arm
2111: suction cup
8: conveying device
9: light guide plate
90: alignment mark
A: light guide plate processing set
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention. The experimental methods without specifying specific conditions in the following examples were selected according to the conventional methods and conditions, or according to the commercial instructions.
It should be noted that although the offset of each plate body during stacking can be eliminated by calibration and offset correction before stacking after the light guide plates are stacked in batches, the inertial offset phenomenon after stacking still occurs when the stacked light guide plates are actually processed in the stacked batch, especially the large-sized light guide plate group, and since the subsequent process is performed simultaneously for a plurality of light guide plates stacked in batches, if the arrangement positions of the light guide plates are offset, the processing is not easy and the processing yield is reduced. To solve the above problems, the present inventors propose an alignment correction application method and an alignment correction system for light guide plates to perform a re-correction for light guide plates of various sizes and types, thereby improving the yield of the entire batch of light guide plate products. The method and system are described below.
As shown in fig. 1 to 4, the present embodiment provides an alignment calibration system 1 for light guide plates, which is used to move and stack a plurality of light guide plates 9, so that the light guide plates 9 are stacked to form a light guide plate processing set a. The alignment calibration system 1 for light guide plate comprises a moving device 10, a processing unit 12 and a calibration platform 11. The moving device 10 is provided with at least two detecting elements 101 for moving the light guide plate 9, and when the moving device 10 moves any one of the light guide plates 9, the detecting elements 101 obtain a plurality of offset signals. The processing unit 12 is in signal connection with the detecting element 101 to calculate the offset of the light guide plate 9 according to the offset signal and generate a deviation correcting signal accordingly. In addition, the calibration platform 11 for carrying the light guide plates 9 is disposed at one side of the moving device 10, the calibration platform 11 has a placement carrier 111 and a displacement motor 112 for driving the placement carrier 111, and the displacement motor 112 moves and rotates according to the deviation-correcting signal before any light guide plate 9 is placed on the placement carrier 111, so that the light guide plates 9 are sequentially aligned and stacked on the placement carrier 111, thereby forming the light guide plate processing group a.
The alignment calibration system 1 further comprises a supporting platform 20 disposed on one side of the calibration platform 11. The supporting platform 20 is used for supporting the stacked light guide plate processing group a for polishing. After the polishing process is completed, the calibration platform 11 receives a returned inertial offset vector, so that before the subsequent light guide plates 9 are placed on the placing carrier plate 111, the displacement motor 112 drives the placing carrier plate 111 to move and rotate according to the deviation correction signal and the stacking offset vector, so as to receive the light guide plates 9 moved by the moving device 10 and stack them to form a new light guide plate processing set a. The stack offset vector is
The relative offset between the edges of the light guide plate 9 at the top and the light guide plate 9 at the bottom in the X-Y coordinate system is (Δ d1, Δ d2), and the total number of light guide plate processing groups a is N. Therefore, the stacked light guide plate processing group A can be corrected again, so that the stacking position accuracy is improved, the inertial deviation of the light guide plate 9 during stacking is eliminated, and the yield of the light guide plate 9 after polishing is improved.
In order to stably move the stacked light guide plate processing group a to the carrying platform 20 for polishing, preferably, the alignment calibration system 1 of the light guide plate further includes a gantry translation device 21 disposed between the carrying platform 20 and the calibration platform 11 for moving the light guide plate processing group a fixed distance to the carrying platform 20. Through the moving structure design of the gantry translation device 21, the stacked light guide plate processing group a is not prone to generating a skew phenomenon in the moving process, so as to stably move to the bearing platform 20. Further, the gantry translation device 21 includes a robot 211, a plurality of suction cups 2111 are disposed on the robot 211, and the light guide plate processing group a is translated by suction of the suction cups 2111. Since some scratches or abrasions may greatly affect the light guiding performance of the light guiding plate, in order to prevent the gantry translation device 21 from scratching the light guiding plate when moving the light guiding plate processing set a, it is a preferred embodiment to move the light guiding plate processing set a by a suction method, especially when moving the light guiding plate 9 with a large size and a large area, not only the light guiding plate 9 needs to be touched carefully, but also the stability during moving needs to be considered, and therefore the light guiding plate processing set a is translated by the suction method through the suction cups 2111 in a better manner. In this embodiment, for example, the robot 211 is provided with the suction cups 2111 on at least three sides corresponding to the light guide plate processing group a, so that the robot 211 moves by suction when the light guide plate processing group a is moved, and the robot 211 does not exert a force on the light guide plate 9 to affect the stacking position when the robot is moved. Of course, the other method of safely and stably moving the light guide plate processing set A can also be applied. Therefore, the surface of the light guide plate 9 can be prevented from being scratched, and the stacked light guide plate processing group A can be stably moved, and the problems of moving deflection and scratching can be further prevented particularly for the large-size light guide plate 9.
When the light guide plates 9 are initially manufactured and the subsequent processing is started, each light guide plate 9 can be transferred to the moving device 10 through a conveying device 8, and the moving device 10 moves the light guide plates 9 to stack the light guide plates on the calibration platform 11, thereby forming a first light guide plate processing group a to be subjected to the subsequent processing. During the process of moving the light guide plate 9 by the moving device, the detecting component 101 disposed on the moving device 10 isThe position state of the light guide plate 9 is started and detected to obtain an offset signal, and then the offset signal is transmitted to the processing unit 12 to calculate and form a deviation-correcting signal and transmitted to the correcting platform 11, so that the correcting platform 11 drives the placing carrier plate 111 to move or rotate according to the deviation-correcting signal before the light guide plate 9 is received by the displacing motor 112. After the adjustment, the moving device 10 places the light guide plates 9 on the placing carrier 111, and repeats the above operations to correct the position of each light guide plate 9 until the first light guide plate processing group a is stacked and formed. Then, the light guide plate processing group a is moved to the carrying platform 20, and the movement can be performed by the robot 211 of the gantry translation device 21. After the light guide plate processing group A is polished, the offset (delta d) of the positions of the edges of the two light guide plates 9 at the top side and the bottom side in the X-Y axis coordinate system in the light guide plate processing group A is detected1，Δd2) And combining the total number N of the light guide plate processing group A to obtain the stacking offset vector
Then, the calibration platform 11 receives the stacking offset vector, and before the light guide plates 9 to be stacked are placed on the placing carrier plate 111, the displacement motor 112 drives the placing carrier plate 111 to move and rotate according to the deviation-correcting signals of the light guide plates 9 and the detected stacking offset vector, so that when the light guide plates 9 are stacked to form the light guide plate processing group a, the inertial offset is synchronously calibrated, and the problem of stacking offset is solved.
The stacking offset vector can be measured in the production line or measured outside the production line, that is, the light guide plate processing group a is detected outside the production line after polishing, and the stacking offset vector is obtained by calculation and then transmitted back to the correction platform 11; or a measuring device 201 is disposed on the supporting platform 20, and the measuring device 201 is in signal connection with the calibration platform 11, so as to measure the polished light guide plate processing set a to obtain a stacking offset vector, and transmit the stacking offset vector to the calibration platform 11, so as to obtain the stacking offset vector by an automatic detection method and transmit the stacking offset vector back to the calibration platform 11, thereby facilitating more accurate calibration of the subsequent light guide plate 9 to be stacked to form the light guide plate processing set a. The measuring device 201 includes a CCD image capturing assembly 2011 for measuring the offset by image capturing. In addition, the measuring apparatus 201 further includes an illumination assembly 2012 to improve the image clarity.
As shown in fig. 5, the embodiment further provides an alignment correction application method of the alignment correction system of the light guide plate, which specifically includes the following steps:
step S10: the plurality of light guide plates 9 are moved by the moving device 10 and stacked, so that the light guide plates 9 are stacked to form a light guide plate processing group a. The mobile device 10 is provided with at least two detecting elements 101.
Step S11: the driving moving device 10 moves any one of the light guide plates 9 to the calibration platform 11, and the detecting element 101 detects the position of the light guide plate 9, thereby obtaining a plurality of offset signals. Wherein the calibration platform 11 has a placing carrier 111 and a displacement motor 112 for driving the placing carrier 111.
Step S12: after the detecting element 101 obtains the offset signal, it transmits the offset signal to the processing unit 12, and the processing unit 12 calculates the offset of the light guide plate 9 according to the offset signal and generates a deviation-correcting signal.
Step S13: before the light guide plate 9 is placed on the placing carrier 111, the displacement motor 112 drives the placing carrier 111 to move and rotate according to the deviation-correcting signal.
Step S14: the moving device 10 places the light guide plate 9 on the placement carrier 111 after the displacement rotation.
Step S15: the light guide plates 9 are repeatedly moved by the moving device 10 until the light guide plates 9 are sequentially aligned and stacked on the placing carrier plate 111, thereby forming the light guide plate processing group a.
The steps S10-S15 are performed before stacking the light guide plates 9 for performing offset correction so that the light guide plates 9 can be aligned and stacked in batch, and the present invention further comprises the following steps after the steps are completed:
step S20: moving the light guide plate processing group A to the bearing platform 20 for polishing;
step S21: after the polishing process is completed, the light guide plate processing group A is detected to obtain a stacking offset vector. The stack offset vector is
The relative offset between the edges of the light guide plate 9 at the top and the light guide plate 9 at the bottom in the X-Y coordinate system is (Δ d1, Δ d2), and the total number of light guide plate processing groups a is N.
Step S22: the stack offset vector is transmitted back to the calibration platform 11, so that the subsequent light guide plate 9 is placed before the carrier plate 111 is placed, the displacement motor 112 drives the carrier plate 111 to move and rotate according to the deviation correction signal obtained in step S12 and the stack offset vector obtained in step S21, so as to receive the light guide plates 9 moved by the moving device 10, and stack them to form a new light guide plate processing set a. Therefore, the accuracy of the stacking position of the subsequent stacked light guide plate processing group A is improved through correction again.
More specifically, in the light guide plate calibration steps of steps S10-S15, each light guide plate 9 is provided with at least two alignment marks 90 (see fig. 1), the detection elements 101 disposed on the mobile device 10 are each preset with a reference coordinate when being installed, and when the mobile device 10 moves any one of the light guide plates 9 to the calibration platform 11, the detection elements 101 detect the vector between the alignment marks and the reference coordinate to obtain the aforementioned offset signal. As mentioned above, in the actual process, although the deviation correction is performed on each light guide plate 9 through steps S10-S15, the phenomenon of stack inertia deviation still occurs when the light guide plate processing set a is formed by stacking, especially on a large-sized light guide plate, so the present invention provides a technical solution for accurately aligning and stacking the subsequent light guide plate processing set a, so that the problem of inertia deviation can be eliminated by performing the correction again on the light guide plate processing set a which is subsequently stacked.
For example, referring to fig. 1-3, after a subsequent processing procedure of the light guide plate is started, the light guide plate 9 after the preliminary manufacturing is stacked by the moving device 10 to form the light guide plate processing group a, so as to perform operations such as polishing, and further obtain the optical product (as shown in fig. 1) that can be shipped. When the first light guide plate processing group A is subjected to the preposed stacking correction operation, the large-amplitude position offset phenomenon is preliminarily eliminatedAnd after stacking, the stack is moved to the carrier platform 20 for polishing (as shown in fig. 2). After the processing is completed, the processing group A of the light guide plate is detected, and the positions of the light guide plates 9 at the top and bottom sides are checked to obtain the stacking offset vector
Wherein (Δ d1, Δ d2) are the position deviation values in the X-axis and Y-axis directions, and when Δ d1 and Δ d2 are respectively divided by the total number N of the light guide plate processing sets, the inertial deviation state generated during the pre-calibration and stacking process of each light guide plate 9 can be known (as shown in fig. 2 and 3). The light guide plate processing set a shown in the drawings is for illustrative purposes and does not show the actual light guide plate size and the stacking offset state. For example, the displacement value of the two light guide plates 9 in the X-axis direction is 30 and the displacement value in the Y-axis direction is-15, and the light guide plate processing group A has 30 sheets in total, i.e. the stacking offset vector is known as
The stack offset vector is then transmitted back to the calibration stage 11 for calibration and stacking. Accordingly, in the process of the advanced correction and stacking of the subsequent light guide plates 9, the stacking offset vector can be introduced as a correction parameter, and the problem of inertial offset of the stacked light guide plates 9 can be effectively solved by detecting the deviation correction signal generated by the offset state generated when each light guide plate 9 moves through the moving device 10, so that the yield of the delivered products is greatly improved.
Particularly, when the scales of the light guide plates 9 such as length, width, thickness, etc. are different, even if there is a slight difference, the inertial deviation generated after stacking will change accordingly, in other words, the inertial deviation of the light guide plates 9 of different product specifications will be different after stacking, so that the light guide plate processing group a in the subsequent processing procedure of each light guide plate needs to be detected and re-corrected again by the steps of the alignment correction method of the present invention, and cannot be applied to all the light guide plates of different scales simply based on the collected data, so that the detection and re-correction are necessary for each batch of different light guide plates 9.
In summary, the alignment correction application method of the light guide plate and the alignment correction system of the light guide plate provided by the invention can eliminate the problem of inertial deviation generated after the light guide plates are stacked into a group through re-correction, thereby greatly improving the alignment accuracy of the stacked light guide plates, and enabling the processed light guide plates to have better yield besides enabling the stacked light guide plates to be easily polished. Because different specifications of light guide plates can generate different inertial migration phenomena after being stacked to form a light guide plate processing set, the light guide plate processing sets of different scales still need to be detected and corrected by the method and the system of the invention aiming at the light guide plates of various product specifications, and then are transmitted back to the correction platform to correct the offset of the subsequently stacked light guide plates, so that the later stacked light guide plates can not generate the inertial migration. In order to further improve the measurement speed and accuracy of the stacking offset vector, a measurement device is arranged on the bearing platform so as to directly detect the polished light guide plate processing group. In addition, the gantry moving device can be used as a mechanism for moving the light guide plate processing set, and the light guide plate processing set can be stably moved in an adsorption manner by a mechanical arm.
Claims (7)
1. An alignment correction system for a light guide plate is characterized by comprising a moving device, a processing unit and a correction platform;
the mobile device is provided with at least two detection components, and when the mobile device moves any one light guide plate, the detection components acquire a plurality of offset signals;
the processing unit is in signal connection with the detection assembly and obtains the plurality of offset signals so as to calculate the offset of the light guide plate according to the offset signals and generate a deviation correcting signal;
the correcting platform is used for bearing the light guide plate and is arranged on one side of the moving device, the correcting platform is provided with a placing carrier plate and a displacement motor for driving the placing carrier plate, and the displacement motor moves and rotates according to the deviation correcting signal before any light guide plate is placed on the placing carrier plate, so that the light guide plates are sequentially aligned and stacked on the placing carrier plate to form the light guide plate processing group;
the alignment correction system of the light guide plate also comprises a bearing platform arranged on one side of the correction platform and used for bearing the stacked light guide plate processing group for polishing, after polishing, the correction platform receives the returned stacking offset vector, so that the subsequent light guide plate is placed in front of the placing carrier plate, the displacement motor drives the placing carrier plate to move and rotate according to the deviation correcting signal and the stacking offset vector to bear the light guide plate moved by the moving device and stack the light guide plate processing group to form a new batch, and the stacking offset vector is
The relative offset between the edges of the light guide plate at the top and the light guide plate at the bottom in an X-Y axis coordinate system is (delta d1, delta d2), and the total number of the light guide plate processing groups is N.
2. The alignment correction system of light guide plate according to claim 1, wherein the alignment correction system further comprises a gantry translation device disposed between the supporting platform and the correction platform for moving the light guide plate processing set to a fixed distance to the supporting platform.
3. The system of claim 2, wherein the gantry translation device comprises a robot for moving the light guide plate processing set.
4. The system according to claim 3, wherein the robot further comprises a plurality of suction cups for sucking the light guide plate processing set in a horizontal direction.
5. The system as claimed in claim 4, wherein the platform has a measuring device connected to the calibration platform for measuring the stack offset vector and transmitting the stack offset vector to the calibration platform.
6. An alignment correction method of a light guide plate, characterized in that the alignment correction system of a light guide plate according to any one of claims 1 to 5 is used, comprising the steps of:
step S10: moving a plurality of light guide plates by the moving device and stacking the light guide plates to enable the light guide plates to be stacked to form a light guide plate processing set, wherein the moving device is provided with at least two detection assemblies;
step S11: driving the mobile device to move any light guide plate to the correction platform, and simultaneously detecting the position of the light guide plate by the detection component to obtain a plurality of offset signals, wherein the correction platform is provided with a placement carrier plate and a displacement motor for driving the placement carrier plate;
step S12: after obtaining the offset signal, the detecting component transmits the offset signal to the processing unit, and the processing unit calculates the offset of the light guide plate according to the offset signal and generates a deviation correcting signal;
step S13: before the light guide plate is placed on the placing carrier plate, the displacement motor drives the placing carrier plate to move and rotate according to the deviation correcting signal;
step S14: the mobile device places the light guide plate on the placement carrier plate after displacement and rotation;
step S15: repeatedly moving the light guide plates by using the moving device until the light guide plates are sequentially aligned and stacked on the placing carrier plate, thereby forming a light guide plate processing group;
step S20: moving the light guide plate processing set to the bearing platform for polishing;
step S21: after the polishing process is completed, the light guide plate processing group is detected to obtain a stacking offset vector
The relative offset between the edges of the light guide plate at the top side and the light guide plate at the bottom side in an X-Y axis coordinate system is (delta d1, delta d2), and the total number of the light guide plate processing groups is N;
step S22: the stack offset vector is transmitted back to the calibration platform, so that the subsequent light guide plate is placed before the carrier plate is placed, the displacement motor drives the carrier plate to move and rotate according to the deviation correction signal obtained in step S12 and the stack offset vector obtained in step S21, so as to receive the light guide plates moved by the moving device, and stack the light guide plates to form a new light guide plate processing set.
7. The method for calibrating the alignment of light guide plates according to claim 6, wherein in steps S10-S15, each light guide plate has at least two alignment marks, the detecting elements of the mobile device are each preset with a reference coordinate when the mobile device is installed, and the detecting elements detect the vector between the alignment marks and the reference coordinates when the mobile device moves any light guide plate to the calibration platform, so as to obtain the offset signal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910035975.0A CN109761057B (en) | 2019-01-15 | 2019-01-15 | Alignment correction system and alignment correction method for light guide plate |
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| CN105225978B (en) * | 2014-06-17 | 2019-06-04 | 联华电子股份有限公司 | Correction Method of Overlay Error |
| CN105467631A (en) * | 2016-01-05 | 2016-04-06 | 深圳市华星光电技术有限公司 | Detection and correction system, detection device and correction method for panel pressing |
| CN205708824U (en) * | 2016-03-15 | 2016-11-23 | 东莞市湘江电子科技有限公司 | A light guide plate automatic placement machine |
| CN107010400A (en) * | 2017-04-07 | 2017-08-04 | 东莞六鼎智能科技有限公司 | A Method of Automatic Arrangement of Materials and Parts Based on Visual Positioning |
| TWI645225B (en) * | 2017-09-22 | 2018-12-21 | 茂林光電科技股份有限公司 | Alignment correction system of light guide plate and application method thereof |
| CN207451018U (en) * | 2017-10-23 | 2018-06-05 | 苏州茂立光电科技有限公司 | The contraposition calibration equipment of light guide plate |
| CN207992532U (en) * | 2018-01-08 | 2018-10-19 | 苏州向隆塑胶有限公司 | Light guide plate is to bit correction board |
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