Cutting system and cutting method for display panel

Abstract

The invention provides a cutting system and method for a display panel, and the cutting system comprises a cutting platform which is used for fixing a to-be-cut plate; the first laser is used for outputting a first laser beam and a third laser beam; the first laser beam cuts the to-be-cut plate along the first cutting line so as to cut partial layers; a third laser beam cuts the display panel along the second cutting line so as to cut part of layers; the second laser is used for outputting a second laser beam and cutting the residual layer of the to-be-cut plate along the first cutting line; the stripper is used for stripping a partial layer on one side of a non-central part of the display panel so as to form a cutting area on the display panel; and the third laser device is used for outputting a fourth laser beam and cutting the remaining layer of the cutting area along a third cutting line so as to obtain the corresponding display panel. According to the cutting system and method for the display panel, the cutting effect can be improved, and the product yield can be improved.

Description

Technical Field

[0001] The present invention relates to the field of laser cutting, and particularly to a cutting system and a cutting method for a display panel. Background Art

[0002] With the continuous progress of precision device processing technology, laser cutting technology has gradually replaced traditional cutting methods and become one of the mainstream technologies in the field of precision machining due to its advantages such as high efficiency, low damage, and high automation. Laser cutting precisely cuts materials through a laser beam with a high energy density, which can not only achieve the processing of complex shapes but also significantly reduce mechanical damage to the materials, and is particularly suitable for the preparation of electronic components such as display panels with extremely high precision requirements.

[0003] In the process of preparing a display panel, in order to improve production efficiency and reduce costs, the display panel is usually prepared in a large sheet size. However, large display panels face many challenges in actual processing. For example, due to their large size, it is easy to affect the yield of products during cutting. Therefore, there is room for improvement. Summary of the Invention

[0004] The purpose of the present invention is to provide a cutting system and a cutting method for a display panel, which can improve the cutting effect and thus improve the yield of products.

[0005] To solve the above technical problems, the present invention is realized through the following technical solutions:

[0006] The present invention provides a cutting system for a display panel, including:

[0007] A cutting platform for fixing a to-be-cut plate, wherein there are multiple display panels in the to-be-cut plate, and the display panel is a multi-layer structure;

[0008] A first laser for outputting a first laser beam and a third laser beam; the first laser beam cuts the to-be-cut plate along a preset first cutting line to cut a part of the layers of the to-be-cut plate; the third laser beam cuts the display panel along a preset second cutting line to cut a part of the layers of the display panel;

[0009] A second laser for outputting a second laser beam and cutting the remaining layers of the to-be-cut plate along the first cutting line;

[0010] A stripper for stripping a part of the layers on one side of the non-center part of the display panel to form a cutting area on the display panel; and

[0011] A third laser for outputting a fourth laser beam and cutting the remaining layers of the cutting area along a preset third cutting line to obtain the corresponding display panel.

[0012] In an embodiment of the present invention, it further includes:

[0013] A vision locator for identifying the marking points of the to-be-cut sheet and the marking points of the cutting area; and

[0014] A processor for forming corresponding first cutting lines and second cutting lines based on the positions of the marking points on the to-be-cut sheet, and forming a corresponding third cutting line based on the positions of the marking points on the cutting area; the first cutting line is located at the periphery of the display panel; the second cutting line is located on the non-central part of the display panel;

[0015] Wherein, the processor is further configured to generate different cutting instructions, and the first laser, the second laser, the stripper, and the third laser work according to the corresponding cutting instructions respectively.

[0016] In an embodiment of the present invention, the laser intensities of the first laser beam, the second laser beam, the third laser beam, and the fourth laser beam are different.

[0017] In an embodiment of the present invention, the number of layers of the to-be-cut sheet cut by the first laser beam is different from the number of layers of the display panel cut by the third laser beam.

[0018] In an embodiment of the present invention, the display panel sequentially includes a first PET layer, a first OCA layer, a PI layer, an OLED layer, a second OCA layer, and a second PET layer;

[0019] The first laser is a carbon dioxide laser, and the first laser beam is used to cut the first PET layer, the first OCA layer, the PI layer, and the OLED layer, and the third laser beam is used to cut the first PET layer and the first OCA layer.

[0020] In an embodiment of the present invention, the second laser is an ultraviolet laser, and the second laser beam is used to cut the second OCA layer and the second PET layer.

[0021] In an embodiment of the present invention, the third laser is a green laser, and the fourth laser beam is used to cut the PI layer, the OLED layer, the second OCA layer, and the second PET layer.

[0022] In an embodiment of the present invention, the green laser performs multiple cuts on the same cutting area according to the corresponding cutting instructions, and after multiple cuts, cuts through the remaining layers of the cutting area.

[0023] In an embodiment of the present invention, the stripper is a laser stripper.

[0024] The present invention also discloses a method for cutting a display panel, including:

[0025] Cutting a to-be-cut plate along a preset first cutting line with a first laser beam to cut a part of layers of the to-be-cut plate;

[0026] Cutting the remaining layers of the to-be-cut plate along the first cutting line with a second laser beam;

[0027] Cutting a display panel along a preset second cutting line with a third laser beam to cut a part of layers of the display panel;

[0028] Peeling off a part of layers on one side of the non-centered part of the display panel to form a cutting area on the display panel;

[0029] Cutting the remaining layers of the cutting area along a preset third cutting line with a fourth laser beam to obtain a corresponding display panel.

[0030] As described above, the present invention provides a cutting system and a cutting method for a display panel. Through the synergistic effect of the first laser beam and the second laser beam, the thermal influence is reduced and the product quality is improved. During the cutting process, there is no need for product transfer, the production process is optimized, and the efficiency is improved. The laser cutting process is simple to operate and has a high success rate, ensuring production stability. Precise cutting is achieved, cutting defects are reduced, and the overall quality of the product is improved. It can meet the high-precision requirements such as multi-layer material cutting and fine cutting.

[0031] Of course, it is not necessary for any product implementing the present invention to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0033] Figure 1 It is a schematic diagram of cutting along the first cutting line in an embodiment of the present invention;

[0034] Figure 2 It is a schematic diagram of cutting along the second cutting line in an embodiment of the present invention;

[0035] Figure 3 It is a schematic diagram of cutting along the third cutting line in an embodiment of the present invention;

[0036] Figure 4 For Figure 1 the sectional view;

[0037] Figure 5 is Figure 2 a sectional view of;

[0038] Figure 6 is Figure 3 a sectional view of;

[0039] Figure 7 This is a flowchart of a method for cutting a display panel according to an embodiment of the present invention.

[0040] In the figure: 10 is the sheet to be cut; 20 is the display panel; 21 is the first PET layer; 22 is the first OCA layer; 23 is the PI layer; 24 is the OLED layer; 25 is the second OCA layer; 26 is the second PET layer; 30 is the first cutting line; 31 is the first laser beam; 32 is the second laser beam; 40 is the second cutting line; 41 is the third laser beam; 42 is the cutting area; 50 is the third cutting line; 60 is the fourth laser beam. Specific Embodiments

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0042] Please refer to Figure 1 , the present invention discloses a cutting system for a display panel, which can cut the sheet 10 to be cut to obtain a plurality of display panels 20. Among them, the display panel 20 is prepared as the sheet 10 to be cut for efficiency during preparation. The sheet 10 to be cut may have a plurality of display panels 20, and the plurality of display panels 20 may be arranged in an array to form the sheet 10 to be cut. The cutting system may include a cutting platform, a first laser, a second laser, a stripper, a third laser, a vision locator, a processor, etc. The first laser, the second laser, the stripper, the third laser, and the vision locator may be set on the cutting platform.

[0043] In some embodiments, the cutting platform can be used to fix the sheet 10 to be cut to ensure that the sheet remains stable during the cutting process and avoid a decrease in cutting accuracy caused by movement or vibration. The sheet 10 to be cut is a sheet that needs to be cut. The display panel 20 in the sheet 10 to be cut has a multi-layer structure. For example, the display panel 20 may sequentially include a first PET layer 21, a first OCA layer 22, a PI layer 23, an OLED layer 24, a second OCA layer 25, and a second PET layer 26. Among them, PET is a transparent and flexible polymer material commonly used for the outer protection or substrate of display panels. OCA (Optical Clear Adhesive) is a transparent adhesive used to bond different material layers, with good optical properties and bonding strength. PI (Polyimide) is a high-temperature resistant and flexible material commonly used as the substrate of flexible display panels. OLED (Organic Light-Emitting Diode) is the core light-emitting layer of the display panel, responsible for displaying images.

[0044] Please refer to Figure 1 and Figure 4 , in some embodiments, the first laser can be a carbon dioxide laser. The first laser can generate and output a first laser beam 31 for cutting operations. The first laser beam 31 can cut the sheet 10 to be cut along a pre-set cutting path (i.e., the first cutting line 30). The first laser beam 31 can be used to cut some layers of the sheet 10 to be cut, including the first PET layer 21, the first OCA layer 22, the PI layer 23, and the OLED layer 24. The first laser beam 31 only cuts some layers of the sheet 10 to be cut, rather than all layers. This selective cutting can reduce damage to other layers and improve cutting accuracy.

[0045] Please refer to Figure 1 and Figure 4 , in some embodiments, the second laser can be an ultraviolet laser. The second laser can generate and output a second laser beam 32 for cutting operations. The second laser beam 32 can cut the sheet 10 to be cut along the above-mentioned first cutting line 30. The second laser beam 32 can be used to cut the remaining layers of the sheet 10 to be cut, including the second OCA layer 25 and the second PET layer 26.

[0046] Please refer to Figure 1 and Figure 4, in some embodiments, the spot of the first laser beam 31 is relatively large (about 200um), resulting in a relatively large thermal damage (about 200um) to the material layer of the display panel 20. By using a first laser beam 31 with a lower power to cut partial layers (the first PET layer 21, the first OCA layer 22, the PI layer 23, the OLED layer 24), excessive thermal damage can be avoided. The spot of the second laser beam 32 is relatively small (about 30um), and the thermal damage is significantly reduced (about 80um). The second laser beam 32 is used to cut the remaining layers (the second OCA layer 25, the second PET layer 26) and ensure that the uncut part is completely cut through. Among them, the main effects of the two - stage cutting include: significantly reducing thermal damage. The partial layer cutting is completed by the first laser beam 31, and the remaining layer cutting is completed by the second laser beam 32, resulting in a substantial reduction in overall thermal damage; improving cutting accuracy. The small spot and low thermal damage of the second laser beam 32 ensure high - precision cutting; optimizing cutting efficiency. The combination of the fast cutting of the first laser beam 31 and the fine cutting of the second laser beam 32 improves the overall efficiency; adapting to the characteristics of multi - layer materials. The two - stage cutting fully considers the different characteristics of multi - layer materials and optimizes the cutting process.

[0047] Please refer to Figure 1 and Figure 4 , in some embodiments, after the cutting by the first laser and the second laser, the large - sheet cutting (CellCutting) process can be achieved. CellCutting refers to the operation of cutting the entire uncut sheet to be cut 10. Subsequently, a small - sheet separation process (CellSeparation) is also required. CellSeparation refers to the operation of separating the display panel 20 after the large - sheet cutting process to separate the cut display panel 20 from the sheet to be cut 10. The separation operation can be completed by mechanical, laser, or other means, depending on the material and process requirements. By isolating the display panel 20, subsequent further processing can be facilitated. Each separated display panel 20 is an independent semi - finished product.

[0048] Please refer to Figure 2 and Figure 5, in some embodiments, the first laser can also generate and output a third laser beam 41 for cutting operations. The third laser beam 41 can cut the display panel 20 along a preset cutting path (i.e., the second cutting line 40). The number of layers of the sheet 10 to be cut by the first laser beam 31 can be different from the number of layers of the display panel 20 cut by the third laser beam 41. For example, the third laser beam 41 can be used to cut some layers of the display panel, including the first PET layer 21 and the first OCA layer 22. Since the OLED layer 24 integrates circuits, it is very sensitive to thermal damage and mechanical damage. The PI layer 23 serves as a protective layer to prevent the third laser beam 41 from penetrating and damaging the OLED layer 24. Therefore, by controlling the output power of the third laser beam 41, it can be ensured that only the first PET layer 21 and the first OCA layer 22 are cut, avoiding affecting the PI layer 23 and the OLED layer 24. At this time, the output power of the third laser beam 41 is lower than that of the first laser beam 31.

[0049] Please refer to Figure 2 and Figure 5 , in some embodiments, the stripper can be a laser stripper. A laser stripper is a device that uses laser energy to strip material layers, such as an LLO (Laser Lift Off) device stripper. The laser stripper can act on the material interface through a laser beam to separate the material layers. The stripper can be used to strip some layers on one side of the non - central part of the display panel 20, that is, the first PET layer 21 and the first OCA layer 22. One side of the non - central part refers to the edge area of the display panel 20, rather than the non - central area, that is, the area of the display panel 20 between the first cutting line 30 and the second cutting line 40. By stripping the first PET layer 21 and the first OCA layer 22, a cutting area 42 can be formed on the display panel 20. The cutting area 42 can provide a clear boundary and area for subsequent cutting operations to ensure that the cutting process is more precise and avoid damaging other parts of the display panel 20.

[0050] Please refer to Figure 3 and Figure 6 , in some embodiments, the third laser can be a green laser. The third laser can generate and output a fourth laser beam 60 for cutting operations. The fourth laser beam 60 can cut the remaining layers of the cutting area 42 along a preset cutting path (i.e., the third cutting line 50), including the PI layer 23, the OLED layer 24, the second OCA layer 25, and the second PET layer 26.

[0051] In some embodiments, the green laser can perform multiple cuts on the same cutting area 42 according to corresponding cutting instructions. After multiple cuts, the remaining layers of the cutting area 42 (including the PI layer 23, the OLED layer 24, the second OCA layer 25, and the second PET layer 26) can be cut through. By performing multiple cuts (such as three cuts), the thermal impact of a single cut can be reduced. Multiple cuts can ensure that the material layers are completely cut off while having a relatively small thermal impact. At this time, each display panel 20 is an independent finished product.

[0052] In some embodiments, the laser intensities of the first laser beam 31, the second laser beam 32, the third laser beam 41, and the fourth laser beam 60 are different. Among them, the power of the first laser beam 31 output by the first laser is 58w, and the speed is 700mm / s, which is used to cut the first PET layer 21, the first OCA layer 22, the PI layer 23, and the OLED layer 24. The power of the second laser beam 32 output by the second laser is 13w, and the speed is 170mm / s, which is used to cut the first PET layer 21 and the first OCA layer 22. The power of the third laser beam 41 output by the first laser is 22w, and the speed is 700mm / s, which is used to cut the second OCA layer 25 and the second PET layer 26. The power of the fourth laser beam 60 output by the third laser is 23w, and the speed is 600mm / s, which is used to cut the PI layer 23, the OLED layer 24, the second OCA layer 25, and the second PET layer 26.

[0053] In some embodiments, the vision locator can be a vision CCD device, which can use a high-precision camera and image processing technology to realize the identification of marking points. The vision locator can be used to identify the marking points of the to-be-cut sheet 10 and the marking points (mark) of the cutting area 42. The role of the marking points is to provide an accurate position reference to ensure the accuracy of the cutting operation.

[0054] In some embodiments, the processor can generate corresponding first cutting lines 30 and second cutting lines 40 based on the positions of the marking points on the to-be-cut sheet 10. The processor generates corresponding third cutting lines 50 based on the positions of the marking points on the cutting area 42. Among them, the first cutting line 30 can be located at the periphery of the display panel 20 and is used to define the starting boundary of the cutting. The second cutting line 40 can be located in the non-central part of the display panel 20 and is used to define the intermediate boundary of the cutting. The third cutting line 50 can be generated based on the marking points of the cutting area 42 and is used to define the final boundary of the cutting.

[0055] In some embodiments, during the above-mentioned cutting process, the processor may generate different cutting instructions to control the operations of the first laser, the second laser, the stripper, and the third laser. Specifically, the first laser may cut the first cutting line 30 and the second cutting line 40 according to the corresponding cutting instructions. The second laser may cut the first cutting line 30 according to the corresponding cutting instructions. The stripper may strip a specific area of the display panel 20 according to the corresponding cutting instructions. The third laser may cut the third cutting line 50 of the display panel 20 according to the corresponding cutting instructions.

[0056] It can be seen that in the above solution, through the synergistic effect of the first laser beam and the second laser beam, the thermal influence is reduced and the product quality is improved. During the cutting process, there is no need to transfer the product, which optimizes the production process and improves the efficiency. The laser cutting process is easy to operate with a high success rate, ensuring production stability. Precise cutting is achieved, reducing cutting defects and enhancing the overall quality of the product. It can meet the high-precision requirements such as multi-layer material cutting and fine cutting.

[0057] Please refer to Figure 7 , the present invention also provides a cutting method for a display panel. This cutting method can be applied to the above-mentioned cutting system to complete the processing of the display panel. The cutting method may include the following steps:

[0058] Step S10: The first laser beam cuts the to-be-cut plate along a preset first cutting line to cut a part of the layers of the to-be-cut plate;

[0059] Step S20: The second laser beam cuts the remaining layers of the to-be-cut plate along the first cutting line;

[0060] Step S30: The third laser beam cuts the display panel along a preset second cutting line to cut a part of the layers of the display panel;

[0061] Step S40: Strip a part of the layers on one side of the non-center part of the display panel to form a cutting area on the display panel;

[0062] Step S50: The fourth laser beam cuts the remaining layers of the cutting area along a preset third cutting line to obtain the corresponding display panel.

[0063] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A display panel cutting system, characterized in that: include: A cutting platform, used to fix the plate to be cut, wherein the plate to be cut has a plurality of display panels, and the display panels are of a multi-layer structure; A first laser is used to output a first laser beam and a third laser beam; the first laser beam cuts the plate to be cut along a preset first cutting line to cut a part of the layer of the plate to be cut; the third laser beam cuts the display panel along a preset second cutting line to cut a part of the layer of the display panel; A second laser is used to output a second laser beam and cut the remaining layer of the plate to be cut along the first cutting line; a stripper for stripping a portion of the layer on a side of a non-central portion of the display panel to form a cutting area on the display panel; as well as The third laser is used to output a fourth laser beam and cut the remaining layer of the cutting area along a preset third cutting line to obtain a corresponding display panel.

2. The display panel cutting system according to claim 1, characterized in that: Also includes: A visual locator, used to identify the marking points of the plate to be cut and the marking points of the cutting area; as well as A processor, configured to form a corresponding first cutting line and a second cutting line based on the positions of the marking points on the plate to be cut, and to form a corresponding third cutting line based on the positions of the marking points on the cutting area; the first cutting line is located at the periphery of the display panel; the second cutting line is located at a non-central portion of the display panel; The processor is further used to generate different cutting instructions, and the first laser, the second laser, the stripper, and the third laser work respectively according to the corresponding cutting instructions.

3. The display panel cutting system according to claim 1, characterized in that: The first laser beam, the second laser beam, the third laser beam, and the fourth laser beam have different laser intensities.

4. The display panel cutting system according to claim 1, characterized in that: The number of layers of the plate to be cut by the first laser beam is different from the number of layers of the display panel to be cut by the third laser beam.

5. The display panel cutting system according to claim 4, characterized in that: The display panel includes a first PET layer, a first OCA layer, a PI layer, an OLED layer, a second OCA layer, and a second PET layer in sequence; The first laser is a carbon dioxide laser, the first laser beam is used to cut the first PET layer, the first OCA layer, the PI layer, and the OLED layer, and the third laser beam is used to cut the first PET layer and the first OCA layer.

6. The display panel cutting system according to claim 5, characterized in that: The second laser is an ultraviolet laser, and the second laser beam is used to cut the second OCA layer and the second PET layer.

7. The display panel cutting system according to claim 5, characterized in that: The third laser is a green laser, and the fourth laser beam is used to cut the PI layer, the OLED layer, the second OCA layer, and the second PET layer.

8. The display panel cutting system according to claim 7, characterized in that: The green laser performs multiple cutting operations on the same cutting area according to corresponding cutting instructions, and cuts through the remaining layers of the cutting area after multiple cutting operations.

9. The display panel cutting system according to claim 1, characterized in that: The stripper is a laser stripper.

10. A method for cutting a display panel, characterized in that: include: The first laser beam cuts the plate to be cut along a preset first cutting line to cut a partial layer of the plate to be cut; The second laser beam cuts the remaining layer of the plate to be cut along the first cutting line; The third laser beam cuts the display panel along a preset second cutting line to cut a part of the layer of the display panel; peeling off a portion of the layer on a side of a non-central portion of the display panel to form a cutting area on the display panel; The fourth laser beam cuts the remaining layer of the cutting area along a preset third cutting line to obtain a corresponding display panel.

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