JP3191259U - 3D stereoscopic display polarizing sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To convert a two-dimensional (2D) to a three-dimensional (3D) liquid crystal display panel so that a 3D three-dimensional display effect appears in a polarizing sheet region for a TFT type liquid crystal display, particularly a TFT-LCD liquid crystal display panel. Provided is a 3D liquid crystal display polarizing sheet capable of realizing the above. SOLUTION: The release film is sequentially bonded to each other, and the original polarizing sheet and the stereoscopic display film are provided. The stereoscopic display film includes a micro retardation film bonded to the original polarizing sheet, and an even number of rows of the micro retardation film. The slow axis of the retardation film is arranged so as to form 0 ° to 50 ° or 130 ° to 180 ° with respect to the transmitted light axis of the original polarizing sheet, and the odd rows of the micro retardation film are arranged. The slow axis of the retardation film is arranged so as to form 130 ° to 180 ° or 0 ° to 50 ° with respect to the transmitted light axis of the original polarizing sheet. [Selection diagram] FIG. 1b

Description

  The present invention converts from a two-dimensional (2D) to a three-dimensional (3D) liquid crystal display panel so that a 3D display effect appears in the polarizing sheet region for TFT-type liquid crystal display, in particular, a TFT-LCD liquid crystal display panel. The present invention relates to a 3D stereoscopic display polarizing sheet and a method for manufacturing the same.

  Conventional polarizing sheets for TFT liquid crystal displays mainly include one release film, one original polarizing sheet, one retardation film, and one outer layer protective film. When bonded to the front side of the display panel, only one type of polarization characteristic can be generated, so that a three-dimensional display effect cannot be exhibited on an ordinary TFT liquid crystal display.

  One of the objects of the present invention is to provide a 3D stereoscopic display polarizing sheet capable of exhibiting a stereoscopic display effect on a liquid crystal display panel.

  The technical means employed in the present invention includes a release film, an original polarizing sheet, and a stereoscopic display film that are sequentially bonded together, and the stereoscopic display film includes a micro phase difference film that is bonded to the original polarizing sheet. The slow axis of the even numbered retardation film of the micro retardation film is arranged to form 0 ° to 50 ° with respect to the transmission optical axis of the original polarizing sheet, or 130 ° to 180 °. The retardation axis of the odd-numbered retardation film of the micro retardation film is arranged so as to form 130 ° to 180 ° or 0 ° to 50 ° with respect to the transmission optical axis of the original polarizing sheet. It is a 3D stereoscopic display polarizing sheet.

  Preferably, the micro retardation film is a cycloolefin polymer (COP) film, a polycarbonate (PC) film, or a cellulose triacetate (TAC) film.

  Preferably, the in-plane retardation value of the micro retardation film is 80 nm to 150 nm.

  Preferably, the optical transmittance of the original polarizing sheet ≧ 42% and the degree of polarization ≧ 99.95%.

  Preferably, the thickness of the micro retardation film is 30 μm to 200 μm.

  Preferably, the original polarizing sheet includes a first protective film, a polyvinyl alcohol film, and a second protective film that are sequentially bonded together, and the release film is bonded to the first protective film, The micro phase difference film is bonded to the second protective film.

  Preferably, it further includes an outer protective film bonded to the stereoscopic display film.

  Preferably, the stereoscopic display film includes an anti-glare AG film, an anti-reflection AR film, or an anti-scratch HC film bonded to the outer surface of the micro retardation film.

  Preferably, the AG value of the antiglare AG film is 20% to 40%, the AR value of the antireflection AR film ≦ 1.0%, and the HC value of the scratch prevention HC film ≧ 2H.

  Another object of the present invention is to provide a method for manufacturing a 3D stereoscopic display polarizing sheet.

The technical means employed in the present invention are as follows. First, a single release film is bonded to the outer surface of the original polarizing sheet, and then the following steps are performed:
The wound original polarizing sheet with the release film bonded on both sides is mounted on the first delivery device so as to be relatively rotatable, and the wound stereoscopic display film can be relatively rotated. Mounting on the second delivery device (1);
After peeling off the release film bonded on the outer surface of the original polarizing sheet of the first stage and connecting the leading end of the peeled release film to the rotating shaft of the first winding device, the first stage of the stereoscopic display film Is attached to the position where the release film of the original polarizing sheet is peeled off by the adhesive material on the outer surface of the original polarizing sheet, thereby forming the 3D stereoscopic polarizing sheet, and releasing the inner and outer surfaces respectively. A step (2) of connecting the 3D stereoscopic display polarizing sheet in which the film and the stereoscopic display film are bonded to at least a pair of bonding rollers to the rotation shaft of the second winding device;
The first and second winding drive motors gradually move the one three-dimensional display film by at least a pair of application rollers during the process of driving and rotating the rotating shafts of the first and second winding devices, respectively. And a step (3) of bonding to the outer surface of the original polarizing sheet having a release film bonded to the surface thereof, to complete the 3D stereoscopic display polarizing sheet manufacturing method.

  According to the present invention, the following beneficial effects can be obtained. Since the 3D stereoscopic polarizing sheet according to the present invention can convert linearly polarized light emitted from the TFT liquid crystal display into independent left and right circularly polarized light of both sets, the viewer wears circularly polarized glasses. The three-dimensional effects can be synthesized using parallax by the central nervous system of the brain by receiving the image light rays of the retardation film of the even and odd lines respectively emitted from the display. According to this, a TFT liquid crystal display panel of a two-dimensional (2D) display model can be converted into a three-dimensional (3D) display model by pasting the 3D stereoscopic display polarizing sheet according to the present invention on the front side of the TFT liquid crystal display panel. It can be widely applied to consumer electronics products such as 3D tablet personal computers, 3D monitors, 3D notebook personal computers and 3D televisions.

It is an operation principle diagram of the 3D stereoscopic display polarizing sheet according to the present invention. FIG. 2 is an enlarged schematic view of the 3D stereoscopic display polarizing sheet in FIG. 1 is a schematic configuration diagram of an embodiment of a 3D stereoscopic display polarizing sheet according to the present invention. It is the structure schematic of another one Embodiment of the 3D stereoscopic display polarizing sheet which concerns on this invention. It is a figure which shows the sticking process of the 3D stereoscopic display polarizing sheet which concerns on this invention.

  Hereinafter, the 3D stereoscopic display polarizing sheet according to the present invention will be further described with reference to the drawings.

  As shown in FIG. 2, the release film 1, the original polarizing sheet 8, and the stereoscopic display film 9 are sequentially attached to the 3D stereoscopic display polarizing sheet A as shown in FIG. 1A according to the present invention. The three-dimensional display film 9 includes a micro phase difference film 5 bonded on the original polarizing sheet 8, and the slow axes of the phase difference films in even rows of the micro phase difference film 5. Are arranged so as to form 0 ° to 50 ° with respect to the transmission optical axis of the original polarizing sheet 8, or arranged so as to form 130 ° to 180 °. The slow axis is arranged to form 130 ° to 180 ° or 0 ° to 50 ° with respect to the transmission optical axis of the original polarizing sheet 8. Then, as shown in FIGS. 1A and 1B, when the 3D stereoscopic display polarizing sheet A according to the present invention is bonded to the front side of the liquid crystal display panel B, the 3D stereoscopic display polarizing sheet A is The linearly polarized light transmitted from the backlight D through the polarizing plate C and the TFT liquid crystal display panel B can be converted into two mutually independent circularly polarized states. The image reaching the left eye is a left circularly polarized image beam emitted from the even-numbered phase difference film, and the image reaching the human right eye is the right circle emitted from the odd-numbered phase difference film. Polarized image rays, and a 3D stereoscopic display image is formed in the human brain central nervous system by an image synthesized by image parallax of even and odd rows, and a 2D display model TFT liquid crystal display panel is converted into a 3D stereoscopic display model. Can be converted It has become the door.

  In general, the general-purpose original polarizing sheet 8 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 include a surface functional film 6 bonded to the outer surface of the micro phase difference film 5. The surface functional film 6 may be an anti-glare AG film, an anti-reflection AR film, or an anti-scratch HC film. The surface functional film 6 is preferably an anti-glare AG film. The anti-glare AG value is preferably 20% to 40%.

  The polyvinyl alcohol film 3 (PVA film) is adsorbed with a dichroic substance such as iodine or a dichroic dye, and then subjected to a crosslinking reaction, stretching, and drying. The polyvinyl alcohol film is washed with water, so that the dirt on the film surface can be removed and the anti-adhesive material can be cleaned. It can also be made. In order to protect the polyvinyl alcohol film 3 in order to weaken it when the polyvinyl alcohol film 3 is stretched, it is necessary to laminate protective films on both sides thereof, that is, the first protective film 2 and the second protective film. 4 need to be laminated. As a material for the protective film, a protective film having excellent properties such as transparency, mechanical strength, thermal stability, moisture blocking properties, and isotropic properties is required. For example, it may be a cellulose resin such as cellulose triacetate, polynorbornene, polycarbonate, polystyrene or acrylic acid, preferably a cellulose triacetate film (TAC film), particularly preferably a base The TAC film is a TAC film that has been subjected to saponification treatment, and the TAC film and the PVA film may be bonded together with a water-soluble paste, preferably pasted with a polyvinyl alcohol paste.

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

  The in-plane retardation value Re of the micro retardation film 5 is preferably 80 nm to 150 nm, particularly preferably a quarter wave plate, Re = 125 nm, where Re is a thin film in the visible light range. In-plane retardation, Re = (nx−ny) × d, where nx and ny indicate the folding rate of the film in the slow axis direction and the fast axis direction, respectively, and d indicates the thickness of the film.

  The micro retardation film 5 may be an optical thin film such as a polycarbonate film (PC), a cycloolefin polymer (COP) film, or a cellulose triacetate film (TAC). In the present invention, the selection of a micro retardation film requires a film having good optical transparency, low reflectance, excellent mechanical strength characteristics, stability under wet heat conditions, moisture prevention characteristics, etc. In the example, a cycloolefin polymer (COP) film is preferable, and the thickness is 30 μm to 200 μm.

  For the pasting of the three-dimensional display film A and the original polarizing sheet 8, conventionally known adhesives and pressure-sensitive adhesive materials can be used, for example, acrylic acid polymers, organosilicon polymers, polyesters, polyurethanes, polyethers. A transparent adhesive material such as may be used. In addition, it is preferable to use an acrylic acid-based pressure-sensitive adhesive material from the viewpoints of optical transparency, adhesion characteristics, weather resistance, and the like.

As shown in FIG. 4, in the pasting method, first, the double-sided adhesive material is applied to the wound original polarizing sheet 8 on the adhesive material applicator, and then, on the inner surface of the original polarizing sheet 8. A single layer of release film is bonded to each other. In addition, it was the said peeling film 1 bonded on the inner surface, and it was the peeling film 18 bonded on the outer surface. And the following sticking step is completed.
Step 1: The wound original polarizing sheet 8 having the release film bonded on both sides is mounted on the first delivery device 11 of the precision alignment sticking machine so as to be relatively rotatable and wound. The three-dimensional display film 9 is mounted on the second delivery device 14 of the precision alignment sticking machine so as to be relatively rotatable, and then the slow axis of the even-numbered retardation film and the transmission axis of the original polarizing sheet Are arranged to form 0 ° to 50 ° or 130 ° to 180 °, and the slow axis of the retardation film in the odd-numbered rows and the transmission axis of the original polarizing sheet form 130 ° to 180 ° or 0 ° to 50 °. Thus, adjustment is performed with respect to the transmission optical axis of the original polarizing sheet 8 and the slow axis of the three-dimensional display film 9 so that it can be guaranteed.
Step 2: After peeling off the release film 18 bonded on the outer surface of the original polarizing sheet at the leading stage, and connecting the leading end of the peeled release film 18 to the rotating shaft of the first winding device 12, The top stage of the stereoscopic display film 9 is bonded to the position where the release film 18 is peeled off by an adhesive material on the outer surface of the original polarizing sheet 8, thereby forming the 3D stereoscopic display polarizing sheet A, and The 3D stereoscopic display polarizing sheet A in which the release film 1 and the stereoscopic display film 9 are bonded to the inner and outer surfaces, respectively, is connected to the rotating shaft of the second winding device 13 through at least a pair of application rollers 15.
Step 3: During the process in which the first and second winding drive motors drive and rotate the rotating shaft of the first winding device 12 and the rotating shaft of the second winding device 13, respectively, the first delivery device 11 And the second delivery device 14 gradually unwind, and at least a pair of sticking rollers 15 follow the original polarizing sheet 8 and the three-dimensional display film 9 and rotate relatively to each other so that they are bonded together to form a 3D three-dimensional display. The process of forming the polarizing sheet A, that is, at least one pair of sticking rollers 15 is used to stick a single three-dimensional display film 9 on the outer surface of the original polarizing sheet 8 on which the release film 1 is continuously stuck on the inner surface Match.

  In the present embodiment, the original polarizing sheet 8 having the release films bonded to both surfaces passes through the guide roller 16, and then the peeled release film 18 is conveyed to the first winding device 12, while the inner surface thereof. The original polarizing sheet on which the release film 1 is bonded is conveyed to a pair of application rollers 15. The bonded 3D stereoscopic display polarizing sheet A is conveyed to the second winding device 13 by the guide roller 17.

  In order to guarantee the accuracy of the bonding angle, the precision alignment pasting machine has a precision edge ultrasonic probe, infrared detector, center adjustment controller, edge adjustment controller, tension controller, CCD camera, etc. Equipment is installed.

  The outer protective film 7 may be attached to the three-dimensional display film 9 and then completed by the attaching step, or the film layer that has undergone the attaching step is attached to the outer protective film 7 by a precision alignment attaching machine. You may combine them.

  The 3D stereoscopic display polarizing sheet A according to the present invention may be subjected to test analysis using the instrument CS-200, and a 3D stereoscopic display crosstalk value (crosstalk value) may be used as an evaluation index. The 3D stereoscopic display polarizing sheet according to the present invention preferably has a crosstalk value of 2.0% or less.

Example 1:
The configuration shown in FIG. 3 is adopted. In addition, the material of the said micro phase difference film 5 is a polycarbonate film (PC film), and thickness is 30 micrometers-200 micrometers. The surface functional film 6 is an antireflection AR film, and the antireflection AR value is 1.0% or less.

  A TAC film was laminated on both sides of the PVA film with a polyvinyl alcohol paste, and then a 3D stereoscopic polarizing sheet A was produced according to the pasting method.

Example 2:
The configuration shown in FIG. 3 is adopted. In addition, the material of the said micro phase difference film 5 is a triacetate cellulose ester film (TAC film), and thickness is 30 micrometers-200 micrometers. The surface functional film 6 is an antireflection AR film, and the antireflection AR value is 1.0% or less. The production method of the 3D stereoscopic display polarizing sheet A is the same as in Example 1.

Example 3:
The configuration shown in FIG. 3 is adopted. In addition, it is a COP film with the material of the said micro phase difference film 5, and thickness is 30 micrometers-200 micrometers. The one-surface functional film 6 is an antireflection AR film, and the antireflection AR value is 1.0% or less. The production method of the 3D stereoscopic display polarizing sheet A is the same as in Example 1.

Example 4:
The configuration shown in FIG. 3 is adopted. In addition, the material of the said micro phase difference film 5 is a polycarbonate film (PC film), and thickness is 30 micrometers-200 micrometers. The one-surface functional film 6 is an anti-glare AG film, and the anti-glare AG value is 20% to 40%. The production method of the 3D stereoscopic display polarizing sheet A is the same as in Example 1.

Example 5:
The configuration shown in FIG. 3 is adopted. In addition, the material of the said micro phase difference film 5 is a triacetate cellulose ester film (TAC film), and thickness is 30 micrometers-200 micrometers. The surface functional film 6 is an anti-glare AG film, and the anti-glare AG value is 20% to 40%. The production method of the 3D stereoscopic display polarizing sheet A is the same as in Example 1.

Example 6:
The configuration shown in FIG. 3 is adopted. In addition, the material of the said micro phase difference film 5 is a COP film, and thickness is 30 micrometers-200 micrometers. The one-surface functional film 6 is an anti-glare AG film, and the anti-glare AG value is 20% to 40%. The production method of the 3D stereoscopic display polarizing sheet A is the same as in Example 1.

Example 7
The configuration shown in FIG. 2 is adopted. The three-dimensional display film 9 is a micro phase difference film 5, and the material of the micro phase difference film 5 is a COP film and has a thickness of 30 μm to 200 μm. The production method of the 3D stereoscopic display polarizing sheet A is the same as in Example 1.

  Table 1 shows the results of the CS-200 test adopted in each example.

  As a result, the micro retardation film 5 employing the COP film has a low crosstalk value, whereas when the surface functional film 6 is added in addition to the micro retardation film 5 employing the COP film, It can be seen that the talk value is lowered and the crosstalk value is further lowered when the surface functional film 6 employs an anti-glare AG film.

  The above is only a preferred embodiment of the present invention, and does not limit the scope of the present invention. That is, all equivalent changes and additions made based on the contents of the application scope of the present invention are deemed to belong to the technical scope of the present invention.

The present invention converts from a two-dimensional (2D) to a three-dimensional (3D) liquid crystal display panel so that a 3D display effect appears in the polarizing sheet region for TFT-type liquid crystal display, in particular, a TFT-LCD liquid crystal display panel. about the 3D stereoscopic display polarizing sheet which can realize.

Claims (10)

It is equipped with a release film that is laminated in sequence, an original polarizing sheet and a three-dimensional display film,
The stereoscopic display film includes a micro retardation film bonded on the original polarizing sheet, and the slow axes of the even numbered retardation films of the micro retardation film are 0 ° with respect to the transmission optical axis of the original polarizing sheet. It is arranged to form ˜50 °, or arranged to form 130 ° to 180 °, and the slow axis of the retardation film in the odd-numbered rows of the micro retardation film is 130 with respect to the transmission optical axis of the original polarizing sheet. A 3D stereoscopic display polarizing sheet, which is disposed so as to form an angle of 0 ° to 180 ° or 0 ° to 50 °.   The 3D stereoscopic display polarizing sheet according to claim 1, wherein the micro retardation film is a cycloolefin polymer film, a polycarbonate film, or a cellulose triacetate film.   The 3D stereoscopic display polarizing sheet according to claim 1, wherein an in-plane retardation value of the micro retardation film is 80 nm to 150 nm.   The 3D stereoscopic display polarizing sheet according to claim 1, wherein the optical transmittance of the original polarizing sheet is 42% and the degree of polarization is 99.95%.   The 3D stereoscopic display polarizing sheet according to claim 1, wherein the thickness of the micro retardation film is 30 μm to 200 μm.   The original polarizing sheet includes a first protective film, a polyvinyl alcohol film, and a second protective film, which are sequentially bonded, and the release film is attached to the first protective film, and the micro phase difference The 3D stereoscopic display polarizing sheet according to claim 1, wherein the film is attached to a second protective film.   The 3D stereoscopic display polarizing sheet according to claim 1, further comprising an outer protective film bonded to the stereoscopic display film.   8. The 3D according to claim 1, wherein the stereoscopic display film includes an anti-glare AG film, an anti-reflection AR film, or an anti-scratch HC film bonded to the micro retardation film. 3D display polarizing sheet.   The AG value of the antiglare AG film is 20% to 40%, the AR value of the antireflection AR film ≦ 1.0%, and the HC value of the scratch prevention HC film ≧ 2H. The 3D stereoscopic display polarizing sheet described. First, in the original polarizing sheet, a single release film is laminated on the outer surface, and then the following steps, that is,
The wound original polarizing sheet with the release film bonded on both sides is mounted on the first delivery device so as to be relatively rotatable, and the wound stereoscopic display film can be relatively rotated. Mounting on the second delivery device (1);
After peeling off the release film bonded on the outer surface of the original polarizing sheet of the first stage and connecting the leading end of the peeled release film to the rotating shaft of the first winding device, the first stage of the stereoscopic display film Is bonded to the position where the release film of the original polarizing sheet is peeled off by the adhesive material on the outer surface of the original polarizing sheet, thereby forming the 3D stereoscopic display polarizing sheet according to claim 1, and, A step (2) of connecting a 3D stereoscopic display polarizing sheet in which a release film and a stereoscopic display film are bonded to the outer surface to the rotating shaft of the second winding device through at least a pair of application rollers;
The first and second winding drive motors drive and rotate the rotary shafts of the first and second winding devices, respectively, and during the subsequent process, at least one pair of sticking rollers causes a single three-dimensional display film to A step (3) of continuously bonding on the outer surface of the original polarizing sheet having a release film bonded on the inner surface;
Is completed, The manufacturing method of the 3D stereoscopic display polarizing sheet characterized by the above-mentioned.

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