CN111217151B - Stacking processing method and stacking processing equipment for wedge-shaped light guide plate - Google Patents
Stacking processing method and stacking processing equipment for wedge-shaped light guide plate Download PDFInfo
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- CN111217151B CN111217151B CN202010025963.2A CN202010025963A CN111217151B CN 111217151 B CN111217151 B CN 111217151B CN 202010025963 A CN202010025963 A CN 202010025963A CN 111217151 B CN111217151 B CN 111217151B
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- wedge
- light guide
- shaped light
- guide plate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G57/00—Stacking of articles
- B65G57/02—Stacking of articles by adding to the top of the stack
- B65G57/03—Stacking of articles by adding to the top of the stack from above
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0045—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide
- G02B6/0046—Tapered light guide, e.g. wedge-shaped light guide
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0065—Manufacturing aspects; Material aspects
Abstract
The invention provides a stack processing method and stack processing equipment for a wedge-shaped light guide plate. And defining the distance from the connecting line of the first target position mark and the second target position mark to the boundary of the point distribution area as a first distance value a, and defining the distance from the light incident side formed by preset throwing and milling to the boundary of the point distribution area as a second distance value m. And (3) interleaving the stacked wedge-shaped light guide plates, translating the connecting line of the first target mark and the second target mark of the nth wedge-shaped light guide plate for a distance (a-m) to form a virtual alignment line during stacking, then enabling the virtual alignment line to be superposed with the connecting line of the third target mark and the fourth target mark on the (n + 1) th wedge-shaped light guide plate, and finally polishing and milling the two sides of the stacked light guide plate. Therefore, the wedge-shaped light guide plates can be effectively stacked in batches and polished and milled, and the production efficiency and the product yield are greatly improved.
Description
Technical Field
The invention relates to the field of stack processing of wedge-shaped light guide plates, in particular to a stack processing method and stack processing equipment of a wedge-shaped light guide plate.
Background
The light guide plate is an optical component commonly applied to various display devices at present, and can guide and convert point light into a uniform surface light source by matching with a point light source by virtue of excellent light guide characteristics, so that the light guide plate can be used as a light source to display images on the display devices.
The light guide plate has various appearance designs according to the light emitting requirements or the types of applied machines, and the light guide plate is generally in the form of a rectangular sheet structure, but is also applied to the light guide plate with a wedge-shaped appearance. The wedge-shaped light guide plate is a plate-shaped structural body with one thick end and one thin end, and the overall light emitting brightness can be improved by utilizing the structural characteristics of the wedge-shaped light guide plate. However, with the change of the application requirements of some large displays, a large-sized wedge-shaped light guide plate is appeared. In the manufacturing process of the wedge-shaped light guide plate, after each wedge-shaped light guide plate is provided with a required optical structure, the side surface of the wedge-shaped light guide plate needs to be processed to form a required surface state. In order to improve the processing efficiency, the wedge-shaped light guide plates are generally stacked together in batch, and the time required for the process is reduced by processing a plurality of wedge-shaped light guide plates. The stack of the wedge-shaped light guide plate is limited by the structural characteristics, and is far more difficult than a rectangular sheet structure in the stack, and particularly the stacking difficulty of the wedge-shaped light guide plate with a large size is greatly increased. As mentioned above, if the edge of the wedge-shaped light guide plate stack is to be processed simultaneously with respect to a plurality of plate bodies, the portion to be considered at this time is not only to allow the wedge-shaped light guide plate to be stably stacked, but also the relative position of each wedge-shaped light guide plate after stacking is more important to avoid the occurrence of an excessive difference between the structural scale of each wedge-shaped light guide plate after processing and the scale of the expected product. Therefore, the wedge-shaped light guide plates are not only stacked one by one in a batch manner, but also the relative positions of the wedge-shaped light guide plates need to be considered, so that the severity of the alignment problem is more obvious when large-size wedge-shaped light guide plates are stacked.
Therefore, there are many immature points in the art of stacking wedge-shaped light guide plates in batch for processing, especially for large-sized wedge-shaped light guide plates, there is no solution for stacking wedge-shaped light guide plates in batch, which causes great inconvenience in processing the large-sized wedge-shaped light guide plates. In view of the above, the present invention provides a method and an apparatus for stacking wedge-shaped light guide plates to solve the problems of stacking wedge-shaped light guide plates.
Disclosure of Invention
The invention aims to overcome the defects that the wedge-shaped light guide plates with large sizes cannot be completely fallen and stacked in batches in the prior art, and provides a stack processing method of the wedge-shaped light guide plates and stack processing equipment thereof, which are beneficial to aligning and stacking the wedge-shaped light guide plates in batches, have excellent processing accuracy when the light incident side of the light guide plate is formed by subsequent polishing and milling processing, and improve the production efficiency and the product yield.
The invention solves the technical problems through the following technical scheme:
a method for processing a stack of wedge-shaped light guide plates is used for stacking a plurality of wedge-shaped light guide plates in batches for subsequent processing, wherein one side of each wedge-shaped light guide plate with higher thickness is a first side, one side with lower thickness is a second side, and a point distribution area is defined on one side surface of each wedge-shaped light guide plate, and the method is characterized by comprising the following steps of: arranging a first target mark, a second target mark, a third target mark and a fourth target mark on the side surface of each wedge-shaped light guide plate, wherein the first target mark, the second target mark, the third target mark and the fourth target mark are positioned outside the distribution area, the first target mark and the second target mark are oppositely arranged and are adjacent to the first side, and the third target mark and the fourth target mark are oppositely arranged and are adjacent to the second side; defining a first distance value a, wherein the first distance value a is a vertical distance from a connecting line of the first target mark and the second target mark to the boundary of the point distribution area; defining a second distance value m, wherein the second distance value m is a vertical distance from a light incident side formed by preset polishing and milling to the boundary of the point distribution area; stacking the wedge-shaped light guide plates to form a wedge-shaped light guide plate group, wherein the wedge-shaped light guide plate of the nth piece and the wedge-shaped light guide plate of the (n + 1) th piece in the wedge-shaped light guide plate group are in a state that the first side and the second side are stacked in a staggered mode; when the wedge-shaped light guide plate is stacked, the nth wedge-shaped light guide plate is aligned and stacked according to a first positioning plane, wherein the first positioning plane is a right-angled triangle formed by the first target mark, the second target mark and the third target mark of the nth wedge-shaped light guide plate; the n +1 th wedge-shaped light guide plate is oppositely stacked on the nth wedge-shaped light guide plate according to a second positioning plane, wherein the second positioning plane is a right-angled triangle formed by the second target mark, the third target mark and the fourth target mark of the n +1 th wedge-shaped light guide plate in a co-structure mode, when the wedge-shaped light guide plate is stacked, a connecting line of the first target mark and the second target mark of the nth wedge-shaped light guide plate is translated for a distance of (a-m) to form a virtual alignment line, and then a connecting line of the third target mark and the fourth target mark on the n +1 th wedge-shaped light guide plate is superposed with the virtual alignment line to be positioned and stacked; and performing polishing and milling on two opposite sides of the wedge-shaped light guide plate group to enable each wedge-shaped light guide plate to form the light incident side with the vertical distance from the boundary of the point distribution area as the second distance value m, wherein during polishing and milling, the connecting line position of the first target mark and the second target mark is used as a feed baseline. Therefore, by pre-calculating the due offset when the wedge-shaped light guide plates are stacked, and further enabling the wedge-shaped light guide plates to be stacked and processed in batch according to the method, the preset formed light incident side can be located at the correct position of the light guide plates, and the problems that the wedge-shaped light guide plate stack is difficult to process and the processing precision is insufficient in the prior art are solved.
The present invention also provides a stack processing apparatus for a wedge-shaped light guide plate, which is used for executing the above stack processing method for a wedge-shaped light guide plate, and is characterized by comprising: the control device is provided with a setting unit, and the setting unit is used for defining and forming an alignment compensation parameter after each wedge-shaped light guide plate is provided with the first target mark, the second target mark, the third target mark and the fourth target mark, wherein the alignment compensation parameter is the distance between (a-m); a moving device electrically connected with the control device and driven by the control device to move and stack the wedge-shaped light guide plates; the bearing platform is arranged on one side of the mobile device and is used for bearing the wedge-shaped light guide plates to stack to form the wedge-shaped light guide plate group; the detection device is electrically connected with the control device and is used for detecting the positions of the second target mark, the third target mark and the fourth target mark or the first target mark when the wedge-shaped light guide plates are stacked, and transmitting the positions to the control device for processing to form a detection signal and transmitting the detection signal to the mobile device so as to drive the mobile device; and the polishing and milling device is arranged on one side of the bearing platform and is used for polishing and milling the two opposite sides of the wedge-shaped light guide plate group. Therefore, the processing equipment can effectively solve the inconvenience of stacking the wedge-shaped light guide plates, particularly the embarrassment that the wedge-shaped light guide plates with large sizes cannot be batched and stacked can be improved through the processing equipment, the batch of the wedge-shaped light guide plates with the automatic stacks is achieved, and the subsequent throwing and milling processing is facilitated.
Preferably, the moving device is a robot arm, and the wedge-shaped light guide plates are moved by a suction method, so that the wedge-shaped light guide plates can be moved more stably and accurately.
Preferably, the detecting device comprises at least three CCD image capturing assemblies to improve the efficiency and accuracy of detecting the first to fourth target marks.
The positive progress effects of the invention are as follows: the invention relates to a stack processing method of wedge-shaped light guide plates and stack processing equipment thereof, which calculate the displacement amount to be deviated during stacking in a mode of designing a target on the wedge-shaped light guide plates, so that each wedge-shaped light guide plate can be stably stacked in batches, and can also be provided with a unified scale after polishing and milling processing, and processing deviation caused by deviation of the wedge-shaped light guide plates can be avoided. Moreover, the processing method can be realized by automatic equipment, so that the overall stacking, alignment and processing have excellent efficiency and accuracy, various defects of the wedge-shaped light guide plates on the alignment stack are effectively solved, particularly for large-size wedge-shaped light guide plates, the alignment stacks of the wedge-shaped light guide plates can be quickly and reliably batched, and when the light incident side is formed by subsequent polishing and milling, the wedge-shaped light guide plates can be provided with the same preset scale, and the convenience of the processing process and the yield of processed products are greatly improved.
Drawings
FIG. 1A is a process diagram of a preferred embodiment of the present invention.
FIG. 1B is a diagram of the second step of the manufacturing method according to the preferred embodiment of the present invention.
Fig. 2 is a schematic perspective view illustrating a wedge-shaped light guide plate according to a preferred embodiment of the invention after first to fourth target marks are disposed thereon.
Fig. 3 is a schematic diagram illustrating a first distance value and a second distance value on a wedge-shaped light guide plate according to a preferred embodiment of the invention.
Fig. 4 is a schematic diagram illustrating a stacking alignment plane of the n +1 th wedge-shaped light guide plate and the n-th wedge-shaped light guide plate according to a preferred embodiment of the invention.
Fig. 5 is a schematic plan view illustrating the n +1 th wedge-shaped light guide plate and the n-th wedge-shaped light guide plate stacked according to the preferred embodiment of the invention.
Fig. 6 is a schematic view of a wedge-shaped light guide plate set according to a preferred embodiment of the invention.
FIG. 7 is a schematic diagram of an application of the stack processing apparatus according to the first embodiment of the present invention.
FIG. 8 is a schematic diagram of a second embodiment of a stack processing apparatus according to the present invention.
Detailed Description
The invention will be more clearly and completely described by way of example in the following with reference to the accompanying drawings.
In order to solve the problem of alignment and stacking of wedge-shaped light guide plates, particularly to the application of wedge-shaped light guide plates with large sizes, to facilitate the throwing and milling process, and to make the scales of the wedge-shaped light guide plates after the throwing and milling process uniform and improve the yield, the inventor provides a stacking processing method of wedge-shaped light guide plates. The drawings of the present invention are schematic diagrams for explaining the technical features and means of the present invention, and do not show scale conditions such as actual structural shapes, thicknesses, lengths, widths, heights, and scale sizes.
Fig. 1A is a step diagram (i) of the processing method of the present embodiment, and fig. 1B is a step diagram (ii) of the processing method of the present embodiment. As shown in fig. 1A to 1B, the stack processing method according to the present invention is used for stacking a plurality of wedge-shaped light guide plates 1 in a batch for subsequent processing, wherein a side of each wedge-shaped light guide plate 1 having a higher thickness is a first side 10, a side having a lower thickness is a second side 11, and a side 12 of each wedge-shaped light guide plate 1 defines a dot distribution region 121, and includes the following steps.
First, a first target mark 13, a second target mark 14, a third target mark 15 and a fourth target mark 16 are disposed on the side surface 12 of each wedge-shaped light guide plate 1, and the first target mark 13, the second target mark 14, the third target mark 15 and the fourth target mark 16 are located outside the distribution region 121, wherein the first target mark 13 and the second target mark 14 are disposed opposite and adjacent to the first side 10, and the third target mark 15 and the fourth target mark 16 are disposed opposite and adjacent to the second side 11 (step S01). Fig. 2 is a schematic perspective view of the wedge-shaped light guide plate of this embodiment after the first to fourth target marks are disposed, as shown in fig. 2, the first target mark 13 and the second target mark 14 are disposed adjacent to the first side 10 with a thicker thickness, the third target mark 15 and the fourth target mark 16 are disposed adjacent to the second side 11 with a thinner thickness, and the first target mark 13, the second target mark 14, the third target mark 15 and the fourth target mark 16 are located outside the point distribution region 121, where the point distribution region 121 refers to a region on the wedge-shaped light guide plate 1 for distributing microstructures for adjusting light.
Then, a first distance value a is defined, where the first distance value a is a vertical distance from a connecting line of the first target mark 13 and the second target mark 14 to a boundary of the spotting area 121 (step S02). And defining a second distance m, which is a vertical distance between a light incident side 2 formed by the predetermined polishing and milling and the boundary of the dotting area 121 (step S03). Fig. 3 is a schematic diagram illustrating a first distance value and a second distance value on the wedge-shaped light guide plate of the present embodiment, and as shown in fig. 3, after the first target mark 13, the second target mark 14, the third target mark 15 and the fourth target mark 16 are set, the first distance value a and the second distance value m can be defined and obtained, so as to calculate the distance required to be shifted and aligned when the subsequent stacking is performed based on the first distance value a and the second distance value m. The first distance value a and the second distance value m are not defined in sequence, and the sequence of the steps is only favorable for description.
After obtaining the first distance value a and the second distance value m, the wedge-shaped light guide plates 1 can be stacked to form a wedge-shaped light guide plate group 9, and the nth wedge-shaped light guide plate 1 and the (n + 1) th wedge-shaped light guide plate 1 in the wedge-shaped light guide plate group 9 are stacked in a state that the first side 10 and the second side 11 are staggered with each other; when the wedge-shaped light guide plates 1 are stacked, the nth wedge-shaped light guide plate 1 is aligned and stacked according to a first positioning plane A, wherein the first positioning plane A is a right-angled triangle formed by the first target mark 13, the second target mark 14 and the third target mark 15 of the nth wedge-shaped light guide plate 1; the (n + 1) th wedge-shaped light guide plate 1 is aligned and stacked on the nth wedge-shaped light guide plate 1 according to a second positioning plane B, wherein the second positioning plane B is a right triangle formed by the second target mark 14, the third target mark 15 and the fourth target mark 16 of the (n + 1) th wedge-shaped light guide plate 1, and when stacking, the connecting line of the first target mark 13 and the second target mark 14 of the nth wedge-shaped light guide plate 1 is translated (a-m) for a distance to form a virtual alignment line L, and then the connecting line of the third target mark 15 and the fourth target mark 16 on the (n + 1) th wedge-shaped light guide plate 1 is aligned and stacked with the virtual alignment line L (step S04).
Fig. 4 is a schematic plan view illustrating stacking alignment of an n +1 th wedge-shaped light guide plate and an n-th wedge-shaped light guide plate according to the present embodiment, and fig. 5 is a schematic plan view illustrating stacking of the n +1 th wedge-shaped light guide plate and the n-th wedge-shaped light guide plate according to the present embodiment. Fig. 6 is a schematic view of a wedge-shaped light guide plate set according to the present embodiment. As shown in fig. 4, the right side shows the nth wedge-shaped light guide plate 1, the left side shows the (n + 1) th wedge-shaped light guide plate 1, the connecting line of the first target mark 13 and the second target mark 14 on the nth wedge-shaped light guide plate 1 is translated by (a-m) distance to form a virtual alignment line L, and when the (n + 1) th wedge-shaped light guide plate 1 is stacked on the nth wedge-shaped light guide plate 1 in a head-to-tail staggered manner, the connecting line of the third target mark 15 and the fourth target mark 16 on the (n + 1) th wedge-shaped light guide plate 1 is overlapped with the virtual alignment line L, i.e., the light guide plate can be stacked thereon. The nth wedge-shaped light guide plate 1 is disposed according to a first positioning plane a (the dashed line frame surrounding area of the left wedge-shaped light guide plate in fig. 4), and the (n + 1) th wedge-shaped light guide plate 1 is disposed according to a second positioning plane B (the dashed line frame surrounding area of the right wedge-shaped light guide plate in fig. 4). As shown in fig. 5, after the (n + 1) th wedge-shaped light guide plate 1 is stacked on the (n) th wedge-shaped light guide plate 1, the connection line of the third target mark 15 and the fourth target mark 16 is overlapped on the virtual alignment line L on the (n) th wedge-shaped light guide plate 1, so as to form a slightly shifted stacked state. When the wedge-shaped light guide plates 1 are stacked to form the wedge-shaped light guide plate group 9, refer to fig. 6. In addition, the first positioning plane a and the second positioning plane B can prevent the wedge-shaped light guide plate 1 from being tilted when being stacked, in other words, a placement reference plane is provided, so that the wedge-shaped light guide plate 1 can be stacked smoothly to avoid tilting.
After the wedge-shaped light guide plate group 9 is formed by stacking, the opposite two sides of the wedge-shaped light guide plate group 9 may be polished and milled, so that each wedge-shaped light guide plate 1 forms a light incident side 2 having a second distance value m from the boundary of the point distribution area 121, where the connection position of the first target mark 13 and the second target mark 14 is used as a feeding baseline during polishing and milling (step S05). Referring to fig. 6 again, after the wedge-shaped light guide plates 1 are stacked in a staggered manner to form the wedge-shaped light guide plate group 9, the opposite two sides of the wedge-shaped light guide plate group 9 can be processed to form the light incident side 2 of the wedge-shaped light guide plate 1 by means of milling and polishing, and only the connection line position of the first target mark 13 and the second target mark 14 is taken as the baseline of the feed when milling and then the vertical distance between the light incident side 2 to be formed and the boundary of the point distribution area 121 is taken as the second distance value m (shown as the dotted line position in fig. 6). Therefore, after polishing and milling, the structure scales of each wedge-shaped light guide plate 1 are unified, the product yield of the light guide plate is greatly improved, and more processing margin can be provided.
The stack processing method of the invention effectively solves the alignment stack problem which has been troubled by the prior wedge-shaped light guide plate 1 for a long time, and defines a first distance value a and a second distance value m respectively by setting a mark of a target and matching with the position of the light incident side 2 which is formed in advance as a displacement compensation calculation reference, and adjusts the offset compensation when n +1 wedge-shaped light guide plates 1 are stacked on the nth wedge-shaped light guide plate 1 by utilizing the first distance value a and the second distance value m during stacking, so that the wedge-shaped light guide plate group 9 which is formed by stacking and stacking head and tail parts in a staggered way can obtain each wedge-shaped light guide plate 1 with a unified scale after throwing and milling. Therefore, the problem of alignment and stacking is solved, the product yield after processing is greatly improved, and more processing spaces can be provided.
Next, a stack processing apparatus for performing the stack processing method is described, please refer to fig. 7 and 8, fig. 7 to 8 are schematic application diagrams (a) and (b) of the stack processing apparatus according to the present embodiment, and please refer to fig. 1 to 6 together. The stack processing apparatus 3 comprises a control device 30, a moving device 31, a carrying platform 32, a detecting device 33 and at least one milling device 34.
The control device 30 has a setting unit 301, and the setting unit 301 defines and forms an alignment compensation parameter after setting the first target mark 13, the second target mark 14, the third target mark 15 and the fourth target mark 16 on each wedge-shaped light guide plate 1, wherein the alignment compensation parameter is a distance of (a-m).
The moving device 31 is electrically connected to the control device 30 for moving and stacking the wedge-shaped light guide plates 1. The stacking and moving operations of the wedge-shaped light guide plates 1 and the like described in the above-mentioned stacking method can be performed by the moving device 31, and the moving device 31 can be a mechanical arm and move the wedge-shaped light guide plates 1 by suction in consideration of the stability in moving and the avoidance of damage to the wedge-shaped light guide plates 1.
The supporting platform 32 is disposed on one side of the moving device 31 and is used for supporting the wedge-shaped light guide plates 1 to form the wedge-shaped light guide plate group 9. The detecting device 33 is electrically connected to the control device 30, and is configured to detect the positions of the second target mark 14, the third target mark 15, the fourth target mark 16, or the first target mark 13 when the wedge-shaped light guide plates 1 are stacked, and transmit the positions to the control device 30 for processing to form a detecting signal, and transmit the detecting signal to the moving device 31, so as to drive the moving device 31. In the above-mentioned stack processing method, the nth wedge-shaped light guide plate 1 and the (n + 1) th wedge-shaped light guide plate 1 are placed by the first positioning plane a and the second positioning plane B during stacking to avoid the skew during placement, wherein the first positioning plane a and the second positioning plane B can be detected by the detecting device 33 to confirm the position of each target mark, thereby being beneficial to forming the first positioning plane a and the second positioning plane B. The offset during stacking is implemented by the control device 30 transmitting the alignment compensation parameters to the moving device 31 together, so that the moving device 31 can stack the wedge-shaped light guide plates 1 one by one according to the above-mentioned method steps by the control device 30 in a staggered manner end to form the wedge-shaped light guide plate group 9.
The polishing and milling device 34 is disposed on one side of the supporting platform 32, and is configured to perform polishing and milling processing on two opposite sides of the wedge-shaped light guide plate group 9, and during processing, a feed baseline of the polishing and milling device 34 may be a connection position of the first target mark 13 and the second target mark 14. In practical applications, the polishing and milling device 34 may be configured as one unit, and after one side of the wedge-shaped light guide plate group 9 is polished and milled to form the light incident side, the carrying platform 32 is transferred or the polishing and milling device 34 is moved to process the opposite side of the wedge-shaped light guide plate group 9. Alternatively, two polishing and milling devices 34 may be provided to simultaneously process the opposing sides of the wedge-shaped light guide plate group 9 to form the light incident side 2 on each wedge-shaped light guide plate 1.
To facilitate detecting each target mark, in one embodiment, the detecting device 33 includes at least three CCD image capturing components 331, and the position of each target mark can be confirmed by image detection. In order to improve the image detection effect, an illumination component may be disposed beside each CCD image capturing component 331 to enhance the image recognition capability. The detecting device 33 may be directly mounted on the supporting platform 32, or may be disposed on the moving device 31, and the effect of detecting each target mark can be achieved, and here, the detecting device 33 is disposed on the supporting platform 32 as an example, but the stack processing apparatus 1 of the present invention is not limited thereto. The stack operation of the wedge-shaped light guide plates 1 is shown in fig. 2 to 6 and the corresponding paragraphs of the above-mentioned figures.
In summary, the stack processing method and the stack processing apparatus for wedge-shaped light guide plates according to the present invention calculate the displacement amount to be shifted during stacking by designing the target on the wedge-shaped light guide plate, so that each wedge-shaped light guide plate can be stably stacked in batch, and further, a unified ruler can be provided after polishing and milling processing, thereby not causing processing deviation, and providing more room for processing. Based on the demand change of the related industries, the size of the wedge-shaped light guide plate has been gradually increased due to the product demand, and thus the production aspect is hindered, so that the present inventors propose various technical features as described above to effectively overcome the polishing and milling process problem of the wedge-shaped light guide plate. The processing method can be realized by automatic equipment, has excellent efficiency and accuracy in integral stacking, alignment and processing, effectively solves various defects of the wedge-shaped light guide plates on the alignment stack, particularly large-size wedge-shaped light guide plates, can quickly and reliably align and stack all the wedge-shaped light guide plates in batches, and can enable all the wedge-shaped light guide plates to have the same preset scale when the light inlet side is formed by subsequent polishing and milling, greatly improves the convenience of the processing process and the yield of processed products, and can avoid excessive polishing and milling grinding on the thinner side of the wedge-shaped light guide plates stacked on the wedge-shaped light guide plates and the lower layers when the thicker side of the wedge-shaped light guide plates is polished and milled to form the light inlet side.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (4)
1. A method for processing a stack of wedge-shaped light guide plates is used for stacking a plurality of wedge-shaped light guide plates in batches for subsequent processing, wherein one side of each wedge-shaped light guide plate with higher thickness is a first side, one side with lower thickness is a second side, and a point distribution area is defined on one side surface of each wedge-shaped light guide plate, and the method is characterized by comprising the following steps of:
arranging a first target mark, a second target mark, a third target mark and a fourth target mark on the side surface of each wedge-shaped light guide plate, wherein the side surface of each wedge-shaped light guide plate is defined with the point distribution area, the first target mark, the second target mark, the third target mark and the fourth target mark are positioned outside the point distribution area, the first target mark and the second target mark are oppositely arranged and are adjacent to the first side, and the third target mark and the fourth target mark are oppositely arranged and are adjacent to the second side;
defining a first distance value a, wherein the first distance value a is a vertical distance from a connecting line of the first target mark and the second target mark to the boundary of the point distribution area;
defining a second distance value m, wherein the second distance value m is a vertical distance from a light incident side formed by preset polishing and milling to the boundary of the point distribution area;
stacking the wedge-shaped light guide plates to form a wedge-shaped light guide plate group, wherein the wedge-shaped light guide plate of the nth piece and the wedge-shaped light guide plate of the (n + 1) th piece in the wedge-shaped light guide plate group are in a state that the first side and the second side are stacked in a staggered mode; when the wedge-shaped light guide plate is stacked, the nth wedge-shaped light guide plate is aligned and stacked according to a first positioning plane, wherein the first positioning plane is a right-angled triangle formed by the first target mark, the second target mark and the third target mark of the nth wedge-shaped light guide plate; the n +1 wedge-shaped light guide plate is oppositely stacked on the n-th wedge-shaped light guide plate according to a second positioning plane, wherein the second positioning plane is a right-angled triangle formed by the second target mark, the third target mark and the fourth target mark of the n +1 wedge-shaped light guide plate in a co-structure mode, when the wedge-shaped light guide plate is stacked, a connecting line of the first target mark and the second target mark of the n-th wedge-shaped light guide plate is translated for a distance of a-m to form a virtual alignment line, and then a connecting line of the third target mark and the fourth target mark on the n +1 wedge-shaped light guide plate is superposed with the virtual alignment line to be positioned and stacked; and
and performing polishing and milling on two opposite sides of the wedge-shaped light guide plate group to enable each wedge-shaped light guide plate to form the light incident side with the vertical distance from the boundary of the point distribution area as the second distance value m, wherein during polishing and milling, the connecting line position of the first target position mark and the second target position mark is used as a feed baseline.
2. A stack processing apparatus of a wedge-type light guide plate for performing the stack processing method of a wedge-type light guide plate according to claim 1, comprising:
the control device is provided with a setting unit, and the setting unit is used for defining and forming an alignment compensation parameter after each wedge-shaped light guide plate is provided with the first target mark, the second target mark, the third target mark and the fourth target mark, wherein the alignment compensation parameter is the distance from a to m;
a moving device electrically connected with the control device and driven by the control device to move and stack the wedge-shaped light guide plates;
the bearing platform is arranged on one side of the mobile device and is used for bearing the wedge-shaped light guide plates to stack to form the wedge-shaped light guide plate group;
the detection device is electrically connected with the control device and is used for detecting the positions of the second target mark, the third target mark and the fourth target mark or the first target mark when the wedge-shaped light guide plates are stacked, and transmitting the positions to the control device for processing to form a detection signal and transmitting the detection signal to the mobile device so as to drive the mobile device; and
and the polishing and milling device is arranged on one side of the bearing platform and is used for polishing and milling the two opposite sides of the wedge-shaped light guide plate group.
3. The stack processing apparatus of wedge type light guide plates according to claim 2,
the moving device is a mechanical arm and moves the wedge-shaped light guide plates in a suction mode.
4. The stack processing apparatus of wedge type light guide plates according to claim 2,
the detection device comprises at least three CCD image capturing components.
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