WO2012097536A1

WO2012097536A1 - 3d stereoscopic displaying polarization plate and manufacturing method thereof

Info

Publication number: WO2012097536A1
Application number: PCT/CN2011/071739
Authority: WO
Inventors: 钱琨; 邱韶华
Original assignee: 深圳市盛波光电科技有限公司
Priority date: 2011-01-18
Filing date: 2011-03-11
Publication date: 2012-07-26
Also published as: CN102109630A; CN102109630B; JP3191259U; KR20120005973U

Abstract

A 3D stereoscopic displaying polarization plate (A) comprises a stripping film (1), an original polarization plate (8), and a stereoscopic displaying film (9) stuck in order. The stereoscopic displaying film (9) comprises a micro phase difference film (5) stuck on the original polarization plate (8). The micro phase difference film (5) has multiple lines. The slow axes of the even lines are arranged in 0°～50°or 130°～180°, while the slow axes of the odd lines are arranged in 130°～180°or 0°～50°, compared with the transmission axis of the original polarization plate (8). Thus the linearly polarized light emitted from a TFT LCD is converted into two individual groups of left and right circularly polarized light. The image light from the even lines and the odd lines are respectively received by circular polarization glasses to achieve stereoscopic effect.

Description

FIELD OF THE INVENTION The present invention relates to the field of polarizers for TFT liquid crystal displays, and more particularly to a TFT-LCD liquid crystal display panel exhibiting a 3D stereoscopic display effect and realizing a two-dimensional (2D) orientation. Three-dimensional (3D) liquid crystal display panel converted 3D stereoscopic display polarizer and its preparation method. BACKGROUND OF THE INVENTION A conventional polarizer for a TFT liquid crystal display mainly includes a release film, an original polarizer, a retardation film, and an outer protective film. The polarizer is attached to the front side of the liquid crystal display panel, and only one The polarization characteristics do not allow the general TFT liquid crystal display to exhibit a stereoscopic display effect. SUMMARY OF THE INVENTION An object of the present invention is to provide a 3D stereoscopic display polarizer which can make a liquid crystal display panel exhibit a stereoscopic display effect.

The technical solution adopted by the present invention is: a 3D stereoscopic display polarizer comprising a release film, an original polarizer and a stereoscopic display film which are sequentially bonded together; the stereoscopic display film includes a film attached to the original polarizer a differential phase film, wherein the slow axis of the even line retardation film of the micro phase difference film and the transmission optical axis of the original polarizer are arranged at 0° to 50° or 130° to 180°, and the differential phase film is arranged. The slow axis of the odd-line phase difference film is arranged at an angle of 130° to 180° or 0° to 50° to the transmitted optical axis of the original polarizer.

Preferably, the differential phase difference film is a cycloolefin polymer (COP) film, a polycarbonate (PC) film or a cellulose triacetate (TAC) film. Preferably, the in-plane phase difference of the micro phase retardation film is from 80 nm to 150 nm.

Preferably, the original polarizer has an optical transmittance of 42% and a degree of polarization of 99.95%.

Preferably, the thickness of the differential phase film is 30 μηη! ~ 200μηι.

Preferably, the original polarizer comprises a first protective film, a polyvinyl alcohol film, and a second protective film which are sequentially bonded together, and the release film is attached to the first protective film, and the micro-position is different. The film is attached to the second protective film.

Preferably, an outer protective film attached to the stereoscopic display film is further included.

Preferably, the stereoscopic display film further comprises an anti-glare AG film, an anti-reflection AR film or an anti-scratch HC film attached to the outer surface of the micro-phase difference film.

Preferably, the anti-glare AG film has an AG value of 20% to 40%, an anti-reflection AR film having an AR value of 1.0%, and is resistant to scratching HC 2H of the HC film.

Another object of the present invention is to provide a method of preparing a 3D stereoscopic display polarizer.

The technical solution adopted by the invention is as follows: Firstly, a peeling film is respectively attached to the inner and outer surfaces of the original polarizer, and then the following bonding steps are completed;

Step 1: attaching a roll of the original polarizer to which the two peeling films are attached in a relatively rotatable manner to the first unwinding device, and mounting the rolled stereoscopic display film in a relatively rotatable manner to the second Unwinding device;

Step 2: peeling off the peeling film attached to the outer surface of the original polarizer at the initial stage, and connecting the starting end of the peeled peeling film to the rotating shaft of the first winding device, and then the stereoscopic display film The initial segment is bonded to the stripping film of the original polarizer through the adhesive on the outer surface of the original polarizer to form the above-mentioned 3D stereoscopic polarizer, and the inner and outer surfaces are respectively adhered with a release film and The 3D stereoscopic display polarizer of the stereoscopic display film is connected to the rotating shaft of the second winding device via at least one pair of bonding rollers; Step 3: driving the first and second windings respectively in the first and second winding driving motors Device turn During the rotation of the shaft, a roll of the three-dimensional display film is bonded to the outer surface of the original polarizer to which the release film is attached on the inner surface by at least one pair of bonding rolls.

The invention has the beneficial effects that the 3D stereoscopic display polarizer of the invention can convert the linearly polarized light emitted by the TFT liquid crystal display into two sets of independent left and right circular polarized lights, and the human can receive the light from the display separately by wearing the circular polarized glasses. The image light of the even-numbered lines and the odd-numbered lines is retarded to form a stereoscopic effect using the parallax generated by the central nervous system of the brain. In this way, the 3D stereoscopic display polarizer of the present invention is attached to the front side of the TFT liquid crystal display panel, and the TFT liquid crystal display panel of the two-dimensional (2D) display mode can be converted into a three-dimensional (3D) display mode, which can be widely applied to 3D tablet, 3D monitor, 3D laptop, 3D TV and other consumer electronics market segments. BRIEF DESCRIPTION OF THE DRAWINGS Figure la is a working principle diagram of a 3D stereoscopic display polarizer according to the present invention;

Figure lb is an enlarged schematic view of the 3D stereoscopic display polarizer in Figure la;

2 is a schematic structural view of an embodiment of a 3D stereoscopic display polarizer according to the present invention; and FIG. 3 is a schematic structural view of another embodiment of a 3D stereoscopic display polarizer according to the present invention;

Fig. 4 shows a lamination process of the 3D stereoscopic display polarizer of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a 3D stereoscopic display polarizer of the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 2, the 3D stereoscopic display polarizer A shown in FIG. 1a of the present invention includes a release film 1, an original polarizer 8 and a stereoscopic display film 9 which are sequentially bonded together; the stereoscopic display film 9 includes The differential phase difference film 5 attached to the original polarizer 8 causes the even line phase of the micro phase difference film 5 The slow axis of the differential film and the transmission optical axis of the original polarizer 8 are arranged at 0° to 50° or 130° to 180°, and the slow axis of the odd-numbered phase difference film of the micro-phase phase difference film and the original polarizer 8 The transmitted optical axis is arranged at an angle of 130° to 180° or 0° to 50°. Thus, as shown in FIGS. 1a and 1b, if the 3D stereoscopic display polarizer A of the present invention is attached to the front side of the liquid crystal display panel B, the 3D stereoscopic display polarizer A can be used for the backlight D of the backlight D and the TFT. The linearly polarized light emitted by the liquid crystal display panel B is converted into two sets of independent circularly polarized light states. After the user wears the circular polarized glasses E, the image reaching the left eye of the person is the left circular polarized image light emitted by the even line of the phase difference film, reaching the person The image of the right eye is the image of the right circularly polarized light emitted by the odd-line phase difference film. The image synthesized by the image parallax of the even-numbered rows and the odd-numbered lines forms a 3D stereoscopic image in the central nervous system of the human brain, thereby successfully 2D. The TFT liquid crystal display panel of the display mode is converted into a 3D stereoscopic display mode.

The conventional primary polarizer 8 generally includes a first protective film 2, a polyvinyl alcohol film 3, and a second protective film 4. As shown in FIG. 3, the stereoscopic display film 9 may further include a surface functional film 6 attached to the outer surface of the micro-phase retardation film 5, and the surface functional film 6 may be an anti-glare AG film, an anti-reflection AR film or Anti-scratch HC film. The surface functional film 6 is preferably an anti-glare AG film, wherein the anti-glare AG value is preferably from 20% to 40%.

The polyvinyl alcohol film 3 (PVA film) adsorbs a dichroic substance such as iodine or a dichroic dye, and then further crosslinks, stretches, and dries. The polyvinyl alcohol film is washed with water, so that not only the dirt on the surface of the film and the anti-adhesive agent can be removed, but also the polyvinyl alcohol film can be expanded to prevent the occurrence of uneven dyeing. The polyvinyl alcohol film 3 is very fragile after stretching. In order to protect the polyvinyl alcohol film 3, it is necessary to form a protective film on both sides thereof, that is, the composite first protective film 2 and the second protective film 4, as a material of the protective film, Protective film with excellent properties such as transparency, mechanical strength, thermal stability, moisture barrier properties, isotropy, etc., such as cellulose resin such as cellulose triacetate, polynorbornene, polycarbonate, and polystyrene Or an acrylic or the like, preferably a cellulose triacetate film (TAC film), particularly preferably The TAC film whose surface has been saponified with an alkali or the like, and the TAC film and the PVA film can be bonded by a water-soluble glue, preferably by a polyvinyl alcohol glue.

The monomer transmittance of the original polarizer 8 is preferably 42% or more, and the monomer transmittance is an average transmittance between 400 and 780 nm, and the degree of polarization is preferably 99.95% to 100%.

The in-plane retardation value Re of the micro-phase retardation film 5 is preferably from 80 nm to 150 nm, particularly preferably a quarter-wave plate, Re=125 nm, wherein Re is an in-plane phase difference of the film in the visible light range, Re=(nx -ny) xd, nx and ny represent the refractive indices of the film in the slow axis direction and the fast axis direction, respectively, and d represents the thickness of the film.

The micro phase difference film 5 may be an optical film such as a polycarbonate film (PC), a cycloolefin polymer (COP) film or a cellulose triacetate film (TAC). In the present invention, since the selection of the differential phase difference film requires better optical transparency, lower reflectance, better mechanical strength properties, stability under moist heat conditions, moisture barrier properties, etc., therefore, in this embodiment In the examples, a cycloolefin polymer (COP) film is preferably used, and the thickness is 30 μηη! ~ 200μιη.

The bonding of the stereoscopic display film and the original polarizer 8 can be carried out by using a conventionally known adhesive or adhesive such as an acrylic polymer, a silicone polymer, a polyester, a polyurethane, a polyether or the like. The adhesive is preferably an acrylic adhesive from the viewpoints of optical transparency, adhesive properties, weather resistance and the like.

As shown in FIG. 4, the bonding method may be: First, the packaged original polarizer 8 is coated on the adhesive coater with a double-sided adhesive, and is respectively inside and outside the original polarizer 8. Each of the surface is bonded with a release film, wherein the release film 1 is adhered to the inner surface thereof, and the release film 18 is attached to the outer surface thereof, and then the following bonding steps are completed;

Step 1: attaching a roll of the original polarizer 8 to which two peeling films are attached in a relatively rotatable manner to the first unwinding device 11 of the precision positioning laminator, and forming the rolled stereoscopic display film 9 Can It is mounted on the second unwinding device 14 of the precision positioning and laminating machine in a relatively rotating manner, and the transmission optical axis of the original polarizer 8 is adjusted, and the slow axis of the stereoscopic display film 9 ensures the slow axis of the even-numbered line-difference film and the original The transmission axis of the polarizer is arranged at 0° to 50° or 130° to 180°, and the slow axis of the odd-numbered phase difference film and the transmission axis of the original polarizer are 130° to 180° or 0° to 50°;

Step 2: peeling off the peeling film 18 of the initial stage attached to the outer surface of the original polarizer, and connecting the starting end of the peeled release film 18 to the rotating shaft of the first winding device 12, and then the three-dimensional The initial stage of the display film 9 is adhered to the position where the release film 18 is peeled off by the adhesive on the outer surface of the original polarizer 8, and the 3D stereoscopic display polarizer A is formed, and the inner and outer surfaces are respectively attached. The release film 1 and the 3D stereoscopic display polarizer A of the stereoscopic display film 9 are connected to the rotating shaft of the second winding device 13 via at least one pair of bonding rollers 15;

Step 3: in the process that the first and second winding drive motors respectively drive the rotating shaft of the first winding device 12 and the rotating shaft of the second winding device 13, the first unwinding device 11 and the second unwinding The device 14 discharges the material one by one, and the at least one pair of bonding rollers 15 completes the process of forming the 3D stereoscopic polarizer A by bonding the original polarizer 8 and the stereoscopic display film 9 to each other. That is, a roll of the three-dimensional display film 9 is continuously bonded to the outer surface of the original polarizer 8 to which the release film 1 is bonded on the inner surface by at least a pair of bonding rolls 15.

In the present embodiment, after the original polarizer 8 to which the two-layer release film is bonded is passed through the guide roller 16, the peeled release film 18 is conveyed to the first winding device 12, and the inner surface is bonded to the peeling film. The original polarizer of the film 1 is fed into a pair of bonding rolls 15; the bonded 3D stereoscopic display polarizer A is conveyed to the second winding device 13 via the guide roller 17.

The precision positioning and bonding machine is equipped with precise edge ultrasonic detector, infrared detector, center correction controller, edge correction controller, tension controller and CCD camera to ensure the accuracy of the fitting angle. The outer protective film 7 may be bonded to the stereoscopic display film 9 first, and then the bonding process may be completed, or the film layer that completes the bonding process may be bonded to the outer protective film 7 by a precision positioning laminator. .

The 3D stereoscopic display polarizer A of the present invention can be tested and analyzed by using the instrument CS-200, and the crosstalk value (crosstalk value) of the 3D stereoscopic display is used as an evaluation index. The 3D stereoscopic display polarizer of the present invention preferably has a crosstalk value of less than or equal to 2.0%.

Example 1:

The structure shown in FIG. 3 is adopted, wherein the material of the micro phase difference film 5 is a polycarbonate film (PC film) and has a thickness of 30 μm! 〜200μηι _{; The} surface functional film 6 is an anti-reflection AR film, and the anti-reflection AR value is 1.0% or less.

The TAC film was laminated on both sides of the PVA film with polyvinyl alcohol glue, and then the 3D stereoscopic display polarizer A was formed in accordance with the above bonding method.

Example 2:

The structure shown in FIG. 3 is adopted, wherein the material of the differential phase difference film 5 is a cellulose triacetate film (TAC film), and the thickness is 30 μηη! 〜200μηι _{; The} surface functional film 6 is an anti-reflection AR film, and the anti-reflection AR value is 1.0% or less. The method of producing the 3D stereoscopic display polarizer A is the same as that of the first embodiment.

Example 3:

The structure shown in FIG. 3 is adopted, wherein the material of the differential phase difference film 5 is a COP film and has a thickness of 30 μηη! 〜200μηι _{; The} surface functional film 6 is an anti-reflection AR film, and the anti-reflection AR value is 1.0% or less. The method of producing a 3D stereoscopic display polarizer 同 is the same as that of the first embodiment.

Example 4:

The structure shown in FIG. 3 is adopted, wherein the material of the micro phase difference film 5 is a polycarbonate film (PC film) and has a thickness of 30 μm! ~ 200μηι _; the surface functional film 6 is an anti-glare AG film, anti-glare The AG value is 20% to 40%. The method of producing the 3D stereoscopic display polarizer A is the same as that of the first embodiment.

Example 5:

The structure shown in FIG. 3 is adopted, wherein the material of the differential phase difference film 5 is a cellulose triacetate film (TAC film), and the thickness is 30 μηη! 〜200μηι _{; The} surface functional film 6 is an anti-glare AG film, and the anti-glare AG value is 20% to 40%. The method of producing the 3D stereoscopic display polarizer A is the same as that of the first embodiment.

Example 6:

The structure shown in FIG. 3 is adopted, wherein the material of the differential phase difference film 5 is a COP film and has a thickness of 30 μηη! 〜200μηι _{; The} surface functional film 6 is an anti-glare AG film, and the anti-glare AG value is 20% to 40%. The method of producing the 3D stereoscopic display polarizer A is the same as that of the first embodiment.

Example 7

The structure shown in FIG. 2 is adopted, wherein the stereoscopic display film 9 is a micro phase difference film 5, and the material of the differential phase film 5 is a COP film having a thickness of 30 μηη! ~ 200μηι. The method of producing a 3D stereoscopic display polarizer is the same as in the first embodiment. Table 1

It can be seen that the micro-phase phase difference film 5 of the COP film has a low Crosstalk value; The micro-phase phase difference film 5 of the film, the surface function film 6 is increased to lower the Crosstalk value, and the surface functional film 6 is made of an anti-glare AG film to make the Crosstalk value smaller.

The above is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. That is, equivalent changes and modifications made by the content of the patent application scope of the present invention should fall within the technical scope of the present invention.

Claims

Claim

A 3D stereoscopic display polarizer, comprising: a release film, an original polarizer, and a stereoscopic display film which are sequentially bonded together; the stereoscopic display film includes a micro-position attached to the original polarizer The retardation film is arranged such that the slow axis of the even-numbered phase difference film of the micro-phase retardation film and the transmission optical axis of the original polarizer are arranged at 0° to 50° or 130° to 180°, and the odd-numbered film is odd-numbered. The slow axis of the line phase difference film and the transmission optical axis of the original polarizer are arranged at an angle of 130° to 180° or 0° to 50°.

The 3D stereoscopic display polarizer according to claim 1, wherein the micro phase difference film is a cycloolefin polymer film, a polycarbonate film or a cellulose triacetate film.

The 3D stereoscopic display polarizer according to claim 1, wherein the in-plane phase difference of the micro-phase phase difference film is from 80 nm to 150 nm.

The 3D stereoscopic display polarizer according to claim 1, wherein the original polarizer has an optical transmittance of 42% and a degree of polarization of 99.95%.

The 3D stereoscopic display polarizer according to claim 1, wherein the thickness of the micro phase difference film is 30 μηη! ~ 200μηι.

The 3D stereoscopic display polarizer according to claim 1, wherein the original polarizer comprises a first protective film, a polyvinyl alcohol film, and a second protective film which are sequentially bonded together, and the peeling The film is attached to the first protective film, and the differential phase film is attached to the second protective film.

The 3D stereoscopic display polarizer according to claim 1, further comprising an outer protective film attached to the stereoscopic display film.

The 3D stereoscopic display polarizer according to any one of claims 1 to 7, wherein the stereoscopic display film further comprises an anti-glare AG film attached to the micro-phase retardation film, and an anti-reflection AR film or scratch-resistant HC film.

9. The 3D stereoscopic display polarizer according to claim 8, wherein: the anti-glare The AG film of the AG film has a value of 20% to 40%, and the AR value of the antireflection AR film is 1.0%, which prevents scratching of HC 2H of the HC film.

10. A method for preparing a 3D stereoscopic display polarizer, which is characterized in that: firstly, a peeling film is attached to each of the inner and outer surfaces of the original polarizer, and then the following bonding steps are completed;

Step 1: attaching a roll of the original polarizer bonded with two peeling films to the first unwinding device in a relatively rotatable manner, and mounting the rolled three-dimensional display film in a relatively rotatable manner to the second Unwinding device;

Step 2: peeling off the peeling film of the initial stage adhered to the outer surface of the original polarizer, and connecting the starting end of the peeled peeling film to the rotating shaft of the first winding device, and then the stereoscopic display film The initial stage is bonded to the stripping film of the original polarizer through the adhesive on the outer surface of the original polarizer to form the 3D stereoscopic polarizer according to claim 1, and the inner and outer surfaces are respectively pasted. a 3D stereoscopic display polarizer combined with a release film and a stereoscopic display film is coupled to the rotating shaft of the second winding device via at least one pair of bonding rollers;

Step 3: The first and second winding drive motors respectively drive the rotation of the rotating shafts of the first and second winding devices, and in the subsequent process, the continuous rolling of a roll of the three-dimensional display film is completed by at least one pair of bonding rollers The outer surface of the original polarizer is bonded to the inner surface to which the release film is attached.