Method for preventing coiled optical film from upwarping after cutting

Abstract

The invention discloses a method for preventing a coiled optical film from tilting after cutting, which comprises the following steps: placing the optical film to be cut on a workbench, and arranging an optical film adsorption unit on the workbench; the optical film adsorption unit is started, and the optical film is fixed to the workbench; and when the time for fixing the optical film on the workbench reaches a threshold value, the optical film is cut. And the phenomenon that the coiled optical film tilts after being cut is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of optical film cutting, and in particular to a method for preventing a rolled optical film from warping after cutting. Background Art

[0002] In the prior art, rolled optical films tend to bulge when cut into sheets, which brings many inconveniences to subsequent processing and use. For example, in the manufacture of electronic equipment, the flatness of the optical film is crucial to the performance of the product. The rolling and warping of a single film may lead to problems such as loose fitting and poor display effects. In the production and processing of optical films, rolled optical films often tend to bulge when cut into sheets after cutting, which not only affects the quality and appearance of the optical film, but also brings great inconvenience to subsequent processing and use. Summary of the invention

[0003] In order to at least solve the above technical problems, an object of the present invention is to provide a method for preventing a rolled optical film from warping after cutting, thereby avoiding the occurrence of a warping phenomenon of the rolled optical film after cutting.

[0004] In order to achieve the above-mentioned purpose, the present application provides a method for preventing warping of a rolled optical film after cutting, comprising:

[0005] Placing the optical film to be cut on a workbench, where an optical film adsorption unit is provided;

[0006] Start the optical film adsorption unit to fix the optical film on the workbench;

[0007] When the time that the optical film is fixed on the workbench reaches a threshold, the optical film is cut.

[0008] Further, the optical film adsorption unit includes a vacuum adsorption unit and / or an electrostatic adsorption unit.

[0009] Further, when the optical film adsorption unit includes a vacuum adsorption unit, a plurality of regularly arranged adsorption holes are provided on the upper surface of the workbench;

[0010] A vacuum chamber is provided in the workbench;

[0011] Each adsorption hole is communicated with the vacuum chamber below it.

[0012] Further, the vacuum chamber is made of aluminum alloy;

[0013] The diameter of the adsorption hole is 0.5-1mm.

[0014] Furthermore, it also includes:

[0015] Vacuum pump and vacuum adsorption control module;

[0016] A vacuum pressure sensor is provided in the vacuum chamber;

[0017] The vacuum adsorption control module adjusts the working state of the vacuum pump according to the data sent back by the vacuum pressure sensor.

[0018] Further, when the vacuum degree in the vacuum chamber is lower than a first threshold value, the vacuum adsorption control module controls the vacuum pump to evacuate the vacuum chamber;

[0019] When the vacuum degree in the vacuum chamber reaches a first threshold, the vacuum adsorption control module controls the vacuum pump to stop working.

[0020] Furthermore, a second threshold is included, and the vacuum degree in the vacuum chamber at the second threshold is greater than the vacuum degree in the vacuum chamber at the first threshold;

[0021] A safety valve is provided between the vacuum pump and the vacuum chamber in the workbench;

[0022] When the vacuum degree in the vacuum chamber reaches a second threshold, the vacuum adsorption control module controls the safety valve to release pressure.

[0023] Further, when the optical film adsorption unit includes an electrostatic adsorption unit, a transparent indium tin oxide conductive film is arranged on the upper surface of the workbench;

[0024] A plurality of indium tin oxide conductive films are connected in parallel;

[0025] An insulating unit is arranged between adjacent indium tin oxide conductive films.

[0026] Furthermore, it also includes a high voltage power supply and an electrostatic adsorption control module;

[0027] The electrostatic adsorption control module adjusts the voltage parameters according to the dielectric constant and surface characteristics of the optical film.

[0028] Further, when the optical film adsorption unit includes a vacuum adsorption unit and an electrostatic adsorption unit, the vacuum adsorption unit is arranged below the workbench;

[0029] The electrostatic adsorption unit is arranged below the vacuum adsorption unit;

[0030] The adsorption holes are arranged in the middle area of ​​the upper surface of the workbench;

[0031] Multiple indium tin oxide conductive films surround the edge of the workbench.

[0032] The method for preventing the roll optical film from warping after cutting in the embodiment of the present application comprises: placing the optical film to be cut on a workbench, on which an optical film adsorption unit is provided; starting the optical film adsorption unit to fix the optical film on the workbench; and cutting the optical film when the time the optical film is fixed on the workbench reaches a threshold. The warping phenomenon of the roll optical film after cutting is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings:

[0034] Figure 1 2 is a schematic flow chart of a method for preventing warping of a rolled optical film after cutting according to an embodiment of the present application;

[0035] Figure 2 It is a schematic diagram of the workbench structure of an embodiment of the present application.

[0036] Description of reference numerals:

[0037] 201-working table; 202-adsorption hole; 203-indium tin oxide conductive film. DETAILED DESCRIPTION

[0038] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the present application. It should be understood that the drawings and embodiments of the present application are only for exemplary purposes and are not intended to limit the scope of protection of the present application.

[0039] It should be understood that the various steps described in the method implementation of the present application can be performed in different orders and / or performed in parallel. In addition, the method implementation may include additional steps and / or omit the steps shown. The scope of the present application is not limited in this respect.

[0040] The term "including" and its variations used herein are open inclusions, i.e., "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the following description.

[0041] It should be noted that the modifications of "one" and "plurality" mentioned in this application are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more". "Plurality" should be understood as two or more.

[0042] Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0043] The present application provides a method for preventing a rolled optical film from warping after cutting, comprising:

[0044] Placing the optical film to be cut on a workbench, where an optical film adsorption unit is provided;

[0045] Start the optical film adsorption unit to fix the optical film on the workbench;

[0046] When the time that the optical film is fixed on the workbench reaches a threshold, the optical film is cut.

[0047] Example 1

[0048] Figure 1 : is a schematic diagram of a method for preventing warping of a rolled optical film after cutting according to an embodiment of the present application. Figure 2 This is a schematic diagram of the workbench structure of the embodiment of the present application. Figure 1-2 , the method for preventing the rolled optical film from warping after cutting according to an embodiment of the present application is described in detail.

[0049] The method for preventing the rolled optical film from warping after cutting according to the embodiment of the present application is used to solve the problem that the rolled optical film is prone to warping and curling after cutting.

[0050] First, in step 101, an optical film to be cut is placed on a workbench, on which an optical film adsorption unit is provided.

[0051] In an exemplary embodiment, the optical film to be cut is placed on a workbench 201 , and an optical film adsorption unit is disposed on the workbench 201 .

[0052] In an exemplary embodiment, the rolled optical film is unrolled and laid flat on the workbench 201 .

[0053] In an exemplary embodiment, the upper surface of the workbench 201 is a flat table top, for example, a rectangular table top of 2m*0.5m.

[0054] In an exemplary embodiment, an optical film adsorption unit is disposed on the workbench 201 .

[0055] In an exemplary embodiment, the optical film adsorption unit includes a vacuum adsorption unit and / or an electrostatic adsorption unit, that is, the optical film adsorption unit can be an independent vacuum adsorption unit or an independent electrostatic adsorption unit. Of course, according to needs, the optical film adsorption unit can include both a vacuum adsorption unit and an electrostatic adsorption unit.

[0056] In an exemplary embodiment, when the optical film adsorption unit includes a vacuum adsorption unit, a plurality of regularly arranged adsorption holes 202 are disposed on the upper surface of the workbench 201 .

[0057] In an exemplary embodiment, the adsorption holes 202 are arranged in a circular hole array of multiple rows and columns, for example.

[0058] In an exemplary embodiment, the diameter of the adsorption hole 202 is 0.5-1 mm.

[0059] In an exemplary embodiment, the hole shape of the adsorption hole 202 can also be a rectangular hole, an elliptical hole or a diamond hole as required.

[0060] In an exemplary embodiment, a vacuum chamber is disposed in the workbench 201 .

[0061] In an exemplary embodiment, each adsorption hole 202 is communicated with the vacuum chamber below it, that is, each adsorption hole 202 on the surface of the workbench 201 is communicated with the vacuum chamber below the adsorption hole 202 .

[0062] In an exemplary embodiment, the vacuum chamber is made of aluminum alloy, and the inner wall of the vacuum chamber is smooth and has no protrusions.

[0063] In an exemplary embodiment, the vacuum adsorption unit further includes: a vacuum pump and a vacuum adsorption control module.

[0064] In an exemplary embodiment, the vacuum pump is disposed outside the workbench 201 , for example, on the lower surface of the workbench 201 or outside the workbench 201 , that is, the workbench 201 may not be directly connected to the workbench 201 .

[0065] In an exemplary embodiment, a vacuum pressure sensor is disposed in the vacuum chamber.

[0066] In an exemplary embodiment, the vacuum pump is connected to the adsorption hole 202 through the vacuum chamber.

[0067] In an exemplary implementation, the vacuum adsorption control module adjusts the working state of the vacuum pump according to data sent back by the vacuum pressure sensor.

[0068] In an exemplary embodiment, the vacuum pump is electrically connected to the vacuum adsorption control module.

[0069] In an exemplary implementation, when the vacuum degree in the vacuum chamber is lower than a first threshold, the vacuum adsorption control module controls the vacuum pump to evacuate the vacuum chamber.

[0070] In an exemplary implementation, when the vacuum degree in the vacuum chamber reaches a first threshold, the vacuum adsorption control module controls the vacuum pump to stop working.

[0071] In an exemplary embodiment, the vacuum adsorption control module is further preset with a second threshold value, and the vacuum degree in the vacuum chamber at the second threshold value is greater than the vacuum degree in the vacuum chamber at the first threshold value.

[0072] In an exemplary embodiment, a safety valve is provided between the vacuum pump and the vacuum chamber in the workbench 201 .

[0073] In an exemplary embodiment, the safety valve is disposed on the side or below the workbench 201 .

[0074] In an exemplary embodiment, the safety valve may be understood as a pressure relief valve.

[0075] In an exemplary implementation, when the vacuum degree in the vacuum chamber reaches a second threshold, the vacuum adsorption control module controls the safety valve to release pressure.

[0076] In an exemplary embodiment, when the optical film adsorption unit includes an electrostatic adsorption unit, a transparent indium tin oxide conductive film 203 is disposed on the upper surface of the workbench 201 .

[0077] In an exemplary embodiment, a plurality of ITO conductive films 203 are connected in parallel.

[0078] In an exemplary embodiment, an insulating unit is disposed between adjacent indium tin oxide conductive films 203 ; the provision of the insulating unit prevents a short circuit phenomenon from occurring between adjacent indium tin oxide conductive films 203 .

[0079] In an exemplary embodiment, the electrostatic adsorption unit further includes: a high voltage power supply and an electrostatic adsorption control module.

[0080] In an exemplary embodiment, the high voltage power source is connected to the ITO conductive film 203 via a cable with a shielding structure.

[0081] In an exemplary embodiment, the cable with a shielding structure is provided to reduce electromagnetic interference.

[0082] In an exemplary embodiment, the high voltage power supply is a DC high voltage power supply, and the voltage range is an adjustable power supply of 0 to 10 kV.

[0083] In an exemplary embodiment, as required, an overcurrent and overvoltage protection module is also included to ensure the safety of electricity use.

[0084] In an exemplary embodiment, the electrostatic adsorption control module adjusts the voltage parameters according to the dielectric constant and surface characteristics of the optical film; because the materials of each optical film are different, their dielectric constants and surface characteristics must also be different, so the power supply is set to have an adjustable voltage.

[0085] In an exemplary embodiment, when the optical film adsorption unit includes a vacuum adsorption unit and an electrostatic adsorption unit, the vacuum adsorption unit is disposed under the working table 201 .

[0086] In an exemplary embodiment, the electrostatic adsorption unit is disposed below the vacuum adsorption unit.

[0087] In an exemplary embodiment, the adsorption holes 202 are disposed in a middle area of ​​the upper surface of the workbench 201 .

[0088] In an exemplary embodiment, a plurality of ITO conductive films 203 surround the edge of the workbench 201 .

[0089] Step 102, start the optical film adsorption unit to fix the optical film on the workbench.

[0090] In an exemplary embodiment, as needed, the vacuum adsorption unit or the electrostatic adsorption unit can be started separately, and of course the vacuum adsorption unit and the electrostatic adsorption unit can also be started at the same time to adsorb and fix the optical film placed on the upper surface of the workbench 201.

[0091] In an exemplary embodiment, as required, the vacuum adsorption unit may be started first and then the electrostatic adsorption unit may be started; of course, as required, the electrostatic adsorption unit may be started first and then the vacuum adsorption unit may be started.

[0092] In an exemplary embodiment, because the electrostatic adsorption unit is usually arranged around the upper surface of the workbench 201, when the overall curl of the optical film is still within an acceptable range and only the curl of the edge area of ​​the optical film fails to meet the requirement, only the electrostatic adsorption unit can be started to adsorb and fix the optical film; when only starting the electrostatic adsorption unit cannot solve the problem of the edge area of ​​the optical film, the vacuum adsorption unit is started to synchronously adsorb the optical film.

[0093] Step 103 , when the time the optical film is fixed on the workbench reaches a threshold, the optical film is cut.

[0094] In an exemplary embodiment, after the optical film is fixed on the workbench 201, the optical film is cut when the time for which the optical film is kept in the fixed state reaches a threshold.

[0095] In an exemplary embodiment, the time threshold can be set according to the material and surface curl of the optical film, for example, 30-60 minutes.

[0096] In an exemplary embodiment, after the optical film is fixed on the upper surface of the workbench 201, if the vacuum adsorption unit is working, the vacuum degree in the vacuum chamber is maintained by the vacuum adsorption control module, and the maintenance time is the same as the time threshold.

[0097] In an exemplary embodiment, after the optical film is fixed on the upper surface of the workbench 201, if the electrostatic adsorption unit is working, the electrostatic adsorption control module maintains the adsorption force of the indium tin oxide conductive film 203 on the optical film, and the maintenance time of the adsorption force is the same as the time threshold.

[0098] In an exemplary embodiment, the time threshold is set to better release the stress on the surface of the optical film and to prevent the optical film from returning to its previous curled state when it is removed from the workbench 201 or during subsequent transfer.

[0099] In an exemplary embodiment, as needed, after the time threshold expires, the optical film is maintained adsorbed on the upper surface of the workbench 201. The design is used to fix the optical film on the workbench 201 and replace the protective film on the upper surface of the optical film. When the protective film on the upper surface of the optical film is better, the adsorption of the optical film is stopped, the optical film is turned over, and the side with the better protective film is adsorbed and fixed again to the workbench 201, and then the adsorption is started to replace the protective film on the back of the optical film.

[0100] In an exemplary embodiment, the cutting is performed after the protective films on both sides of the optical film have been replaced.

[0101] In an exemplary embodiment, the optical film at this time not only does not curl, but also eliminates the stress on the surface, thus avoiding the subsequent curling phenomenon, while better protecting the film and the optical film.

[0102] In an exemplary embodiment, the optical film in the present application is a PET optical film, a PC optical film, a PMMA optical film, or the like.

[0103] Although the embodiments disclosed in the present invention are as above, the contents are only embodiments adopted to facilitate understanding of the present invention and are not intended to limit the present invention. Any technician in the field to which the present invention belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in the present invention, but the patent protection scope of the present invention shall still be subject to the scope defined in the attached claims.

Claims

1. A method for preventing warping of a rolled optical film after cutting, characterized in that: include: Placing the optical film to be cut on a workbench, wherein an optical film adsorption unit is provided on the workbench; Starting the optical film adsorption unit to fix the optical film on the workbench; When the time for which the optical film is fixed on the workbench reaches a threshold, the optical film is cut.

2. The method for preventing warping of a rolled optical film after cutting according to claim 1, characterized in that: The optical film adsorption unit includes a vacuum adsorption unit and / or an electrostatic adsorption unit.

3. The method for preventing warping of a rolled optical film after cutting according to claim 2, characterized in that: When the optical film adsorption unit comprises a vacuum adsorption unit, the upper surface of the workbench is provided with a plurality of regularly arranged adsorption holes; A vacuum chamber is provided in the workbench; Each of the adsorption holes is communicated with the vacuum chamber below it.

4. The method for preventing warping of a rolled optical film after cutting according to claim 3, characterized in that: The vacuum chamber is made of aluminum alloy; The adsorption holes have a diameter of 0.5-1 mm.

5. The method for preventing warping of a rolled optical film after cutting according to claim 4, characterized in that: Also included are: Vacuum pump and vacuum adsorption control module; A vacuum pressure sensor is provided in the vacuum chamber; The vacuum adsorption control module adjusts the working state of the vacuum pump according to the data sent back by the vacuum pressure sensor.

6. The method for preventing warping of a rolled optical film after cutting according to claim 5, characterized in that: When the vacuum degree in the vacuum chamber is lower than a first threshold, the vacuum adsorption control module controls the vacuum pump to evacuate the vacuum chamber; When the vacuum degree in the vacuum chamber reaches the first threshold, the vacuum adsorption control module controls the vacuum pump to stop working.

7. The method for preventing warping of a rolled optical film after cutting according to claim 6, characterized in that: Also included is a second threshold value, the vacuum degree in the vacuum chamber at the second threshold value is greater than the vacuum degree in the vacuum chamber at the first threshold value; A safety valve is provided between the vacuum pump and the vacuum chamber in the workbench; When the vacuum degree in the vacuum chamber reaches the second threshold, the vacuum adsorption control module controls the safety valve to release pressure.

8. The method for preventing warping of a rolled optical film after cutting according to claim 7, characterized in that: When the optical film adsorption unit includes an electrostatic adsorption unit, a transparent indium tin oxide conductive film is arranged on the upper surface of the workbench; A plurality of the indium tin oxide conductive films are connected in parallel; An insulating unit is provided between adjacent indium tin oxide conductive films.

9. The method for preventing warping of a rolled optical film after cutting according to claim 8, characterized in that: It also includes a high voltage power supply and an electrostatic adsorption control module; The electrostatic adsorption control module adjusts voltage parameters according to the dielectric constant and surface characteristics of the optical film.

10. The method for preventing warping of a rolled optical film after cutting according to claim 9, characterized in that: When the optical film adsorption unit includes a vacuum adsorption unit and an electrostatic adsorption unit, the vacuum adsorption unit is arranged below the workbench; The electrostatic adsorption unit is arranged below the vacuum adsorption unit; The adsorption holes are arranged in the middle area of ​​the upper surface of the workbench; A plurality of the ITO conductive films surround the edge of the workbench.

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