CN108594351B - Method and device for continuously preparing L ED polarizing film - Google Patents
Method and device for continuously preparing L ED polarizing film Download PDFInfo
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- CN108594351B CN108594351B CN201810404963.6A CN201810404963A CN108594351B CN 108594351 B CN108594351 B CN 108594351B CN 201810404963 A CN201810404963 A CN 201810404963A CN 108594351 B CN108594351 B CN 108594351B
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- wave plate
- base film
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
- G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/22—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type
- G02B30/25—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the stereoscopic type using polarisation techniques
Abstract
The invention provides a method and a device for continuously preparing a L ED polarizing film, wherein the method comprises the following steps of (a) attaching a base film to a 1/2 wave plate, performing laser cutting, and then stripping off the redundant 1/2 wave plate, (b) attaching a circular polarizer to a 1/2 wave plate on the base film, and then stripping the base film, (c) filling the surface of a semi-finished product after the base film is stripped to form a filling layer, and (d) attaching a frosted film to the filling layer, and then curing to obtain the L ED polarizing film.
Description
Technical Field
The invention relates to the field of stereoscopic display devices, in particular to a method and a device for continuously preparing L ED polarizing films.
Background
The polarized stereo display is a 3D display method which utilizes the principle that light has 'vibration direction' to realize the decomposition of original images and stereo imaging, and mainly adopts the mode that left-handed and right-handed polarized films are adjacently arranged on a display device in rows, so that two pictures with different polarization directions are conveyed to a viewer, and when the pictures pass through polarized glasses, each lens of the polarized glasses can only receive the picture with one polarization direction, so that the left eye and the right eye of a person can receive two groups of pictures, and then the pictures are synthesized into a stereo image through the brain.
At present, the polarization film installed on the traditional polarization L ED stereo display screen is generally adhered by a strip structure or a small piece of polarization film with inconsistent left and right optical rotation, or the left and right optical rotation polaroids are used for realizing the manufacture of the polarization film through patterned cutting.
In order to solve the defect of the traditional polarizing film in precision, a method for preparing the polarizing film by sheet-type lamination also exists in the prior art, and the process mainly comprises the following steps: compounding 1/2 wave plate with base film as auxiliary base; then, cutting by a cutting die or semi-cutting by laser, and separating redundant 1/2 wave plates; filling pits caused by the separation of 1/2 wave plates with a PC film through glue, and then curing; punching the cured film to form a patterned phase difference film; and finally, attaching the phase difference film to the polaroid to obtain the 3D polarizing film.
Although the polarizing film with better precision can be obtained by adopting the method, the method has more flow steps, complex process, low efficiency and higher manufacturing difficulty, and is difficult to realize flow production.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The first purpose of the invention is to provide a continuous preparation method of L ED polarizing film, which has simple process and few flow steps and is suitable for the continuous and industrialized scale production of L ED polarizing film.
The second object of the present invention is to provide an apparatus for carrying out the continuous manufacturing method of L ED polarizing film of the present invention.
It is a third object of the present invention to provide an L ED polarizing film prepared by the method of the present invention.
It is a fourth object of the present invention to provide a display device or a display system comprising the L ED polarizing film of the present invention.
In order to achieve the above purpose of the present invention, the following technical solutions are adopted:
a method for continuous preparation of L ED polarizing film, the method comprising the steps of:
(a) bonding the base film with 1/2 wave plates, performing laser cutting, and stripping off the redundant 1/2 wave plates;
(b) attaching the circular polarizer to 1/2 wave plates on the base film, and then peeling the base film;
(c) filling the surface of the semi-finished product after the substrate film is stripped to form a filling layer;
(d) the frosted film was laminated to the filler layer and then cured to obtain L ED polarizing film.
Preferably, in the method of the present invention, the base film is a silica gel base film; more preferably, the width of the silicone base film is greater than or equal to that of the wave plate.
Preferably, step (a) of the method of the present invention further comprises a step of recovering the peeled 1/2 wave plate;
and/or, in the step (b), a step of recovering the peeled base film is further included.
Preferably, in step (c) of the method of the present invention, the filling is performed by applying glue through a slit;
more preferably, the glue is an optical glue.
Preferably, in step (d) of the method of the present invention, the frosted film is a PC frosted film; more preferably, the PC frosted film is a PC frosted film subjected to surface atomization treatment.
Meanwhile, the invention also provides L ED polarizing films prepared by the method.
Further, the invention also provides a display device containing the L ED polarizing film and/or a display system containing the L ED polarizing film.
Furthermore, the invention also provides a device for realizing the method.
Preferably, the device of the present invention comprises, in order: the device comprises a basement membrane laminating device, a laser cutting device, an 1/2 wave plate stripping device, a circular polaroid laminating device, a basement membrane stripping device, a coating device, a frosted film laminating device and a curing device.
Preferably, the laser cutting device mainly comprises a laser head, a laser pipe and a smoke suction hood;
wherein, the laser head interval distribution.
Compared with the prior art, the method has the beneficial effects that L ED polarizing films can be continuously prepared, the efficiency is high, the problems of material waste and low yield caused by punching and cutting the films in multiple links are solved, the materials can be recycled for secondary use, the cost is reduced, the prepared films can keep consistent precision and parameters, and the problems of high 3D crosstalk and low comfort level caused by inconsistent precision and parameters after L ED splicing and packaging are reduced.
The method has simple process, is suitable for the flow-process and large-scale production of L ED polarizing films, and simultaneously has high yield of L ED polarizing films.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a schematic cross-sectional view of the structure of a film obtained after a base film is attached in step (i) according to an embodiment of the present invention;
FIG. 2 is a top view of the resulting film after laser cutting in step (ii) of an embodiment of the present invention;
FIG. 3 is a schematic structural view of a film obtained after lamination with a circular polarizer in step (iv) according to an embodiment of the present invention;
FIG. 4 is a schematic view showing the structure of a film obtained after peeling the base film in step (v) of the present invention;
FIG. 5 is a schematic view of the structure of a finished L ED polarizing film in step (vi) of an embodiment of the present invention;
fig. 6 is a structural diagram of an L ED display device according to an embodiment of the present invention.
Wherein, in FIG. 1, 1 is a basement membrane, 2 is a 1/2 wave plate;
in FIG. 2, 1-the 1/2 wave plate portion to be stripped, 2-the 1/2 wave plate portion remaining in the substrate;
in FIG. 3, 1-base film, 2-1/2 wave plate, 3-circular polarizer;
in FIG. 4, 1-1/2 wave plate, 2-circular polarizer;
in fig. 5, 1-1/2 wave plate, 2-circular polarizer, 3-filling layer 3, 4-frosted film 4;
in FIG. 6, 1-1/2 wave plate, 2-circular polarizer, 3-filling layer, 4-frosted film, 5-adhesive layer, 6-L ED light emitting pixel, 7-L ED driving board.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
In view of the problems of complex process, difficult flow production, low product yield and the like of the conventional preparation method of the L ED polarizing film, the invention particularly provides a novel method for continuously preparing the L ED polarizing film.
The method flow of the invention is described by combining the attached drawings and the used device. Specifically, the method mainly comprises the following steps:
(i) attaching the base film to an 1/2 wave plate;
in this step, the base film is attached to an 1/2 wave plate, and a side view of a structure obtained after attachment refers to fig. 1;
in fig. 1, the base film 1 as a base is preferably a silicone base film, and the width of the base film 1 is preferably equal to or greater than that of 1/2 wave plate 2;
more preferably, the thickness of the base film 1 is 0.188mm or less and the viscosity is less than 35g/cm · s.
Wherein, the silica gel basement membrane is jointed with the 1/2 wave plate by a basement membrane jointing device (preferably a jointing roller);
further, the silica gel basement membrane is fed into the basement membrane laminating device through a silica gel basement unwinding roller, and the silica gel surface of the silica gel basement membrane is kept downward in the process;
meanwhile, the 1/2 wave plate is fed into the base film laminating device through the 1/2 wave plate unwinding roller and is laminated with the silica gel surface of the silica gel base film in the base film laminating device.
(ii) Laser cutting;
in this step, the attached base film and 1/2 wave plate are cut;
as shown in fig. 2 (top view of 1/2 wave plate after laser cutting), 1/2 wave plate after cutting is composed of 1/2 wave plate part 1 to be stripped and 1/2 wave plate part 2 remained on the substrate;
preferably, a plurality of 1/2 wave plate parts 1 remained on the substrate after cutting are arranged in parallel, and the width and the spacing are the same;
further, the width of the 1/2 wave plate portion 2 remaining on the substrate is equal to the pitch of the L ED light-emitting sub-pixels.
In the step, the cutting operation is mainly completed through a laser cutting device, and the laser cutting device mainly comprises a laser head, a laser pipe and a smoke absorption hood;
wherein, the laser head interval distribution, and the interval is the same, and then can carry out synchronous laser cutting.
(iii) Stripping off the excess 1/2 wave plate;
in this step, the excess part (i.e. 1/2 wave plate part 1 to be stripped in fig. 2) on the 1/2 wave plate after cutting is stripped.
The step is mainly completed by an 1/2 wave plate stripping device, and the 1/2 wave plate to be stripped passes through a pressing wheel device, a stripping device of a lower pressing wheel and an ion air knife to remove redundant 1/2 wave plates after laser cutting;
and the stripped 1/2 wave plate is rolled and recovered by the rolling roller.
(iv) The circular polaroid is attached to the 1/2 wave plate on the base film;
in this step, the 1/2 wave plate remaining on the substrate (i.e. 1/2 wave plate 2 remaining on the substrate in fig. 2) is bonded to the circular polarizer;
please refer to fig. 3 for the film structure formed after bonding.
In this step, mainly accomplished by circular polaroid laminating device, circular polaroid laminating device constitute by laminating platform and conveying platform, it is specific:
circular polaroid is placed on the transfer platform surface, circular polaroid is placed position and angle and is fixed, laminate through the 1/2 wave plate of platform and silica gel basement membrane surface of pushing down, laminating platform adopts assembly line transfer mode, assembly line direction of transfer is perpendicular with the 1/2 wave plate direction of transfer on silica gel basement membrane surface (promptly circular polaroid and the 1/2 wave plate on silica gel basement membrane surface set up respectively on two conveying flow lines of mutually perpendicular), when circular polaroid conveys under the membrane, transfer platform upwards holds up circular polaroid, laminating platform pushes down downwards this moment, realize circular polaroid and 1/2 wave plate and laminate according to the angle.
(v) Peeling the base film;
in this step, a base film as a base is peeled off.
This step is mainly performed by a substrate film peeling apparatus, which mainly comprises:
the film adhered with the circular polaroid is conveyed to the pinch roller device by the conveying device to peel off the silica gel base film, the peeled silica gel base film is rolled by the rolling roller, and the surface of a semi-finished product of the peeled silica gel base film forms a rugged structure as shown in figure 4.
(vi) Filling the surface of the semi-finished product after the substrate film is stripped to form a filling layer;
in the step, a coating device is mainly used for filling the uneven structure formed by 1/2 wave plates attached to the circular polarization plate at intervals in a manner that glue is coated through a slit, and the formed filling layer not only fills gaps among 1/2 wave plates, but also coats 1/2 wave plates;
furthermore, in the step, the glue is optical glue, and the light transmittance is more than or equal to 95%.
(vii) Attaching the frosted film to the filling layer, and then curing to obtain L ED polarizing film;
in this step, the frosted film is preferably a PC frosted film (non-phase difference film); particularly, the frosted film is subjected to atomization treatment.
Further, in this step, the frosted film laminating device needs to be used, and the curing device is used for completing, and the method specifically includes:
after passing through a unreeling roller, the frosted film is attached by a frosted film attaching device (preferably a pressing wheel) and then flattened;
then, after being cured by the curing device, the film is wound by a winding roller, and the wound finished film is L ED polarizing film, and the structure of the film is shown in fig. 5.
Meanwhile, the present invention also provides an L ED display device including the 3D polarizing film prepared by the above method, the structure of which can be referred to fig. 6, including:
1/2 wave plate 1, circular polarizer 2, filling layer 3, frosted film 4, adhesive layer 5 (which may be an adhesive layer formed by adhesive glue or optical glue), L ED light-emitting pixels 6, and L ED driving board 7.
The display device can be attached to a L ED liquid crystal cell by attaching the L ED polarizing film to the liquid crystal cell through adhesive glue or optical glue, so that a 3D display device is obtained.
Furthermore, the invention also provides a 3D display system, which not only includes the 3D display device, but also includes an image receiving device such as polarized glasses used in cooperation with the 3D display device, so that a viewer can view the 3D display system through the image receiving device;
the polarized glasses comprise a polarized image mirror for the left eye and a polarized image mirror for the right eye; meanwhile, the polarized glasses may further include an associated shutter system synchronized with image display of the 3D display device, thereby realizing photographing while viewing.
Further, in the above preparation process, the used equipment mainly includes: the device comprises a basement membrane laminating device, a laser cutting device, an 1/2 wave plate stripping device, a circular polarizer laminating device, a basement membrane stripping device, a dispensing device, a frosted membrane laminating device and a curing device;
the continuous production method of L ED polarizing film according to the present invention is carried out by the system formed by the above-mentioned apparatus.
Further, as described above, the system may further comprise a transfer device for transferring each material and/or recovering the release material, and the device system for continuously preparing L ED polarizing film, which is preferably provided by the present invention, is described in conjunction with the process steps of the present invention:
the device system includes: the device comprises a silica gel substrate unwinding roller for feeding the silica gel substrate into the substrate film laminating device, a 1/2 wave plate unwinding roller for feeding 1/2 wave plates into the substrate film laminating device, and a substrate film laminating device for laminating the silica gel substrate and the substrate film.
Conveying the film laminated by the base film laminating device to a laser cutting device, and cutting; the laser cutting device mainly comprises a laser head, a laser pipe and a smoke absorption hood;
wherein, the laser head interval distribution, and the interval is the same, and then can carry out synchronous laser cutting.
The film after laser cutting is conveyed into an 1/2 wave plate stripping device, the 1/2 wave plate to be stripped passes through a pressing wheel device, a stripping device of a lower pressing wheel and an ion air knife to remove redundant 1/2 wave plates after laser cutting; the peeled 1/2 wave plates are rolled and recovered by a rolling rod;
namely, the 1/2 wave plate stripping device comprises a pinch roller device, a stripping device, an ion air knife, a winding roller and the like.
The stripped film is transmitted to a circular polaroid laminating device to complete the lamination of the circular polaroid; the circular polaroid laminating device is composed of a laminating platform and a conveying platform.
The film formed after being attached with the circular polaroid is conveyed into a base film stripping device by a conveying device, the silica gel base film is stripped from the film to be stripped at a pressing wheel device, and the stripped silica gel base film is wound by a winding roller;
that is, the base film peeling apparatus includes: pinch roller device to and wind-up roll.
The film after peeling the base film is filled in a coating device (such as a slit coating head);
the filled film is flattened after being attached by a frosted film attaching device (preferably a pressing wheel), and is cured by a curing device and then wound by a winding roller.
Example 1
Putting the silica gel surface of the silica gel basement membrane downwards into a silica gel basement membrane roll, putting 1/2 wave plates into a 1/2 wave plate roll, wherein the thickness of the silica gel basement membrane is less than or equal to 0.188mm, the viscosity of the silica gel basement membrane is less than 35g, and the width of the silica gel basement membrane is more than or equal to 1/2 wave plate width;
the two films are attached through an attaching roller and then cut by a laser cutting device, and the width of a graph after laser cutting is equal to the distance between L ED light-emitting sub-pixels;
then, the excess 1/2 wave plates cut by the laser are stripped by a pinch roller device, a stripping device of a lower pinch roller and an ion air knife, and the stripped 1/2 wave plates are wound by a winding roller;
placing a circular polaroid on the surface of the conveying table, fixing the placing position and the angle of the circular polaroid, and adhering the circular polaroid to an 1/2 wave plate on the surface of a silica gel base film through a pressing platform, wherein the adhering platform adopts a flow line conveying mode, the conveying direction of the flow line is vertical to the trend of the film, when the circular polaroid reaches the position right below the film, the conveying platform upwards supports the circular polaroid, and at the moment, the adhering platform downwards presses downwards to realize that the circular polaroid is adhered to the 1/2 wave plate according to the angle;
the jointed semi-finished film is continuously conveyed to the pinch roller device by the conveying device to strip the silica gel base film, the stripped silica gel base film is rolled by the rolling roller, and the surface of the semi-finished product of the stripped silica gel base film forms a rugged structure;
glue coating and filling are carried out through a slit coating head, the PC frosted film is flattened through a pressing wheel after being unwound from a winding roll and then is wound by a winding roll through a curing device, and the whole polarizing film is manufactured.
Further, in the polarizing film manufacturing process provided in embodiment 1, it is not necessary to manufacture the polarizing film according to different unit sizes of L EDs with different dot pitches, for example, P1.875 dot pitch, one unit size is 240mm × 240mm, the polarizing film may be manufactured to be 480mm × 480mm, or even larger, and then attached to the L ED of the package, so that the efficiency is improved 3/4 compared to the previous method, and the entire polarizing film is manufactured by using a manufacturing apparatus, so that the problem of low yield caused by manual operation is reduced, and meanwhile, the entire manufacturing process can be performed continuously, mechanically, and the precision is ensured, and the yield is improved.
Experimental example 1
Aiming at a blank small-pitch L ED polarized 3D film with the pitch of below P2.5 in the current market, the method provided by the embodiment of the invention is used for preparing a L ED 3D polarized film with the pitch size of 240mm x 240mm of P1.25;
then, its 3D effect was tested under a 480mm by 480mm L ED light box, which effect reached the requirements for polarized 3D display.
While particular embodiments of the present invention have been illustrated and described, it would be obvious that various other changes and modifications can be made without departing from the spirit and scope of the invention. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.
Claims (11)
1. A method for continuously preparing L ED polarizing film, comprising the steps of:
(a) bonding the base film with 1/2 wave plates, performing laser cutting, and stripping off the redundant 1/2 wave plates;
(b) attaching the circular polarizer to 1/2 wave plates on the base film, and then peeling the base film;
(c) filling the surface of the semi-finished product after the substrate film is stripped to form a filling layer;
(d) the frosted film was laminated to the filler layer and then cured to obtain L ED polarizing film.
2. The method according to claim 1, wherein the substrate film is a silica gel substrate film.
3. The method according to claim 2, wherein the width of the silicone base film is equal to or greater than the width of the wave plate.
4. The method of claim 1, wherein in step (a), further comprising the step of recovering the stripped 1/2 waveplates;
and/or, in the step (b), a step of recovering the peeled base film is further included.
5. The method of claim 1, wherein in step (c), the filling is performed by slit coating the glue.
6. The method of claim 5, wherein the glue is an optical glue.
7. The method of claim 1, wherein in step (d), the frosted film is a PC frosted film.
8. The method according to claim 7, wherein the PC frosting film is a PC frosting film after surface atomization treatment.
9. An apparatus for continuous preparation of L ED polarizing film for carrying out the method of any one of claims 1-8.
10. The apparatus for continuously manufacturing L ED polarizing film according to claim 9, wherein the apparatus comprises a substrate film laminating apparatus, a laser cutting apparatus, a 1/2 wave plate peeling apparatus, a circular polarizer laminating apparatus, a substrate film peeling apparatus, a coating apparatus, a frosted film laminating apparatus, and a curing apparatus, which are arranged in sequence.
11. An L ED polarizing film continuous preparation device according to claim 10, characterized in that, the laser cutting device is mainly composed of a laser head, a laser pipe, and a smoke suction hood;
wherein, the laser head interval distribution.
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| CN109188593A (en) * | 2018-10-08 | 2019-01-11 | 宁波维真显示科技股份有限公司 | 3D light polarizing film of LED display and preparation method thereof |
| CN112114438B (en) * | 2020-08-25 | 2022-07-22 | 长春希龙显示技术有限公司 | Integrated 3D small-space LED display unit structure and manufacturing method thereof |
| CN114940015A (en) * | 2022-05-07 | 2022-08-26 | 宁波维真显示科技股份有限公司 | Flexible 3DLED and preparation device and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101872073A (en) * | 2009-04-24 | 2010-10-27 | 财团法人工业技术研究院 | Three-dimensional display device |
| CN107359186A (en) * | 2017-08-21 | 2017-11-17 | 信利半导体有限公司 | A kind of OLED display modules |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101872073A (en) * | 2009-04-24 | 2010-10-27 | 财团法人工业技术研究院 | Three-dimensional display device |
| CN107359186A (en) * | 2017-08-21 | 2017-11-17 | 信利半导体有限公司 | A kind of OLED display modules |
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