JP2001242449A - Method of manufacturing chip with laminated optical film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a chip with laminated optical films via an optical film laminate which is easy to handle. SOLUTION: The method for manufacturing the chip having laminated optical films 9 is characterized, by obtaining the first optical film cut sheet 4 with cutting of the first optical film sheet 3, of which a first edge AB and a second edge DC are parallel with, or vertical to the optic axis 10, along the first cutting line C1 crossing a third edge BC and a second cutting line C2 crossing a fourth edge AD, by laminating the obtaining first optical film cut sheet on the second optical film belt-like body 21, in such a way that the first and second edges EF, HG of the first optical film cut sheet run parallel to both edges IJ, KL of the second optical film belt-like body. Moreover by cutting the second optical film belt-like body along the shape of the first optical film cut sheet, so as to obtain the optical film laminate 5 and by cutting the obtained optical film laminated body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for manufacturing an optical film laminated chip.

[0002]

2. Description of the Related Art An optical film represented by a polarizing film or a retardation film is important as one of optical parts constituting a liquid crystal display device.
In a ted Nematic (super twisted nematic) type liquid crystal display device and the like, a rectangular optical film laminated chip (9) in which a polarizing film (19) and a retardation film (29) are laminated is used.

[0003] The angle of the optical axis (absorption axis, slow axis) of each optical film in an optical film laminated chip is important, and even if this angle is slightly different from the design value, the obtained liquid crystal display device has the desired performance. Cannot be exhibited. Therefore, the angle (θ1) of the absorption axis (10) and the angle (θ2) of the slow axis (20) with respect to the reference line in the optical film laminated chip must be strictly controlled. Here, the reference line is usually selected so as to be parallel to the long side or the short side of the optical film laminated chip (9) as the reference side (91). Also, the angle (θ1) is an angle displayed as positive when viewed counterclockwise as viewed from the polarizing film side, and the angle (θ2) is an angle displayed as positive counterclockwise as viewed from the polarizing film side (FIG. 12). ). The angles (θ1) and (θ2) are between the relative angle (θ) of the optical axis (20) of the second optical film to the optical axis (10) of the first optical film in the optical film laminated chip (9). Equation (I) has the relationship shown by θ = θ2−θ1 (I) (FIG. 12). Here, the relative angle (θ) is an angle displayed as positive in a counterclockwise direction as viewed from the first optical film side of the optical film laminated chip.

[0004] Such an optical film laminated chip (9) is usually produced from a polarizing film strip (11) and a retardation film strip (21).
1, 21) usually have their optical axes (absorption axis, slow axis) (1
(0, 20) is parallel or perpendicular to the length direction, so if the absolute value of the angle (θ1) is not 0 ° or 90 °, the polarizing film constituting the rectangular optical film laminated chip (9) (19) The polarizing film strip (1)
1), and the angle (θ)
When the absolute value of 2) is not 0 ° or 90 °, the retardation film constituting the rectangular optical film laminated chip (9) is cut obliquely from the retardation film strip (21).

[0005] Such an optical film laminated chip (9)
As a manufacturing method, for example, a polarizing film and a retardation film are laminated, a parallelogram is formed, and two opposite sides (AB, DC) are parallel to the absorption axis (10) of the polarizing film; There is known a method of cutting and manufacturing an optical film laminate (5) (FIG. 13) in which the other two opposite sides (BC, AD) are parallel to the slow axis (20) of the retardation film. (JP-A-11-231129). In such a production method, the optical film laminate (5)
It is manufactured from a polarizing film strip (11) and a retardation film strip (21) (FIG. 13). According to this manufacturing method, although the vertical and horizontal dimensions and size, the angle (θ1) of the absorption axis with respect to the reference side and the angle (θ2) of the slow axis are different, the relative angle (θ) of the slow axis with respect to the absorption axis is different. A plurality of common optical film laminated chips (9) can be cut out from one type of optical film laminated body (5) and manufactured.

However, in such a manufacturing method, a polarizing film strip having an absorption axis parallel to the length direction is used, and a retardation film strip having a slow axis parallel to the length direction. When the relative angle (θ) of the slow axis to the absorption axis is 40 ° or less or 140 ° or more, the shape of the optical film laminate (5) tends to be elongated (FIG. 13). However, there is a problem that handling becomes easy.

In order to solve such a problem, the use of a retardation film strip whose slow axis is perpendicular to the longitudinal direction is also described in the publication. (FIG. 14). According to this manufacturing method, even when the relative angle (θ) is 40 ° or less, or 140 ° or more, the shape of the optical film laminate (5) does not become elongated, and handling is relatively easy. .

However, the relative angle (θ) of the target optical film laminated chip (9) is various, and each time the relative angle (θ) of the target optical film laminated chip is switched, the phase difference film strip is changed. As (21), it was necessary to switch between using the slow axis parallel to the length direction and perpendicular to the length direction (FIGS. 13 and 1).
4).

[0009]

Therefore, the present inventor has proposed:
Relative angle (θ) in optical film laminated chip (9)
As a result, the first side was developed as a result of intensive studies to develop a method for manufacturing an optical film laminated chip via an optical film laminate that is relatively easy to handle without switching the retardation film strip. And after cutting the polarizing film sheet parallel or perpendicular to its absorption axis along a specific cutting line, the second side is laminated on the retardation film strip and cut off the retardation film strip. The obtained optical film laminate is found to have a shape that is relatively easy to handle, regardless of the direction of the slow axis of the retardation film or the relative angle (θ) in the intended optical film laminate chip. The present inventors have found that by cutting the optical film laminate (5), it is possible to obtain the desired optical film laminated chip (9), and have reached the present invention.

[0010]

That is, the present invention provides a square optical film laminated chip (9) comprising a laminated first optical film (19) and a second optical film (29).
To the first side (AB), the second side (DC), and the third side (BC)
And the first side (AB) and the second side (DC) are parallel to each other and parallel or perpendicular to its optical axis (10). ) And a second optical film strip (21) whose optical axis (20) is parallel or perpendicular to its length direction,

The first optical film sheet (3) is placed on the optical axis (20) of the second optical film relative to the optical axis (10) of the first optical film in the optical film laminated chip (9) with respect to the first side (AB). ) Relative angle (θ) or (θ
+ 90 °) and the third side (B
Cutting along a first cutting line (C1) intersecting C), and parallel to the cutting line (C1) at a distance (L1) equal to the width (W2) of the second optical film strip; The first side (EF) formed by cutting along the second cutting line (C2) intersecting the fourth side (AD) and cutting along the first cutting line (C1), the second cutting line ( The second side (HG) formed by cutting along C2) and the third side (F) corresponding to a part of the third side (BC) of the first optical film sheet (3).
C) and the fourth side (A) of the first optical film sheet (3).
D) has a fourth side (AH) corresponding to a part of D), and the first side (EF) and the second side (HG) form an angle of θ or θ + 90 ° with respect to the optical axis (10). First optical film cut sheet (4) is obtained (FIGS. 1, 3, 5,
(Fig. 7),

The obtained first optical film cut sheet (4) is placed on the second optical film strip (21), and the first side (EF) and the second side (HG) of the first optical film cut sheet (4) are placed. Are laminated along both edges (IJ, KL) of the second optical film strip (21), and the second optical film strip (21) follows the shape of the first optical film cut sheet (4). The first side (EF) corresponding to the first side (EF) of the first optical fill cut sheet (4) and the second side (HG) of the first optical film cut sheet (4). The second side (HG), the third side (FC) corresponding to the third side (FC) of the first optical film cut sheet (4), and the first optical film cut sheet (4)
Has a fourth side (AH) corresponding to the fourth side (AH), and the first side (EF) and the second side (HG) are parallel or perpendicular to the optical axis (20) of the second optical film. (FIGS. 2, 4, 6, and 8).

An object of the present invention is to provide a method for producing an optical film laminated chip (9), which comprises cutting the obtained optical film laminated body (5) (FIG. 9).

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION The first optical film and the second optical film applied to the production method of the present invention include, for example, a polarizing film, a retardation film, a polarization separating film and the like.

Here, the polarizing film has a property of absorbing linearly polarized light having a vibration plane parallel to its absorption axis (optical axis) and transmitting linearly polarized light having a vibration plane perpendicular thereto. And an optical film having a diaxial dye such as iodine or a dichroic dye adsorbed and oriented on a uniaxially stretched polyvinyl alcohol film. The polarizing film may have a protective film attached to one or both sides of such a polyvinyl alcohol film. Examples of the protective film include a film made of a cellulose resin such as triacetyl cellulose and diacetyl cellulose.

A retardation film is defined as a linearly polarized light having a vibration plane parallel to its slow axis (optical axis);
An optical film having a function of giving a phase difference to linearly polarized light having a vibration plane that is perpendicular, and is obtained by stretching a polymer film made of, for example, a polycarbonate resin, polysulfone, or polyethersulfone. Films and the like. The retardation film may have a protective film attached to one or both sides of such a stretched film. Examples of the protective film include a film made of a cellulose resin such as triacetyl cellulose and diacetyl cellulose.

The polarized light separating film is an optical element having a function of transmitting linearly polarized light having a vibration plane parallel to its transmission axis (optical axis) and reflecting linearly polarized light having a vibration plane perpendicular thereto. Film.

These optical films can be supplied as an optical film strip wound on a roll or the like.
Its width is, for example, about 500 to 2000 mm. In the production method of the present invention, the first optical film may be a polarizing film and the second optical film may be a retardation film, or the first optical film is a polarization separation film and the second optical film is a retardation film. May be
The first optical film may be a polarization film and the second optical film may be a polarization separation film, or the first optical film may be a polarization separation film and the second optical film may be a polarization film.

Hereinafter, the manufacturing method of the present invention will be described with reference to FIGS. The first optical film sheet (3) used in the production method of the present invention is a sheet-like material made of such an optical film. The first optical film sheet (3) shown in FIG. 1, FIG. 3, FIG. 5, and FIG.
Sides, namely the first side (AB), the second side (DC), the third side (B
C) and a fourth side (AD). First side (A
B) and the second side (DC) are parallel (FIGS. 1 and 3) or perpendicular (FIGS. 5 and 7) to the optical axis (10), and are a pair of opposite sides parallel to each other. The other side of the first optical film, that is, the third side (BC) and the fourth side (AD) are a pair of opposite sides, and may or may not be parallel to each other. When the third side (BC) and the fourth side (AD) are parallel to each other, the first side (AB) and the second side (DC) are expressed as (-θ1) or (90 ° -θ1). The angles may be equal (φ3). The first optical film sheet (3) can be manufactured, for example, from a first optical film strip (11) whose optical axis (10) is parallel or perpendicular to the length direction. Specifically, it can be manufactured by cutting the first optical film strip (11) along a cutting line (C3) forming an angle (φ3) with respect to the length direction (FIGS. 10 and 10). 11). When the first optical film strip (11) whose optical axis (10) is parallel to the length direction is used, the angle (φ3) is made equal to the angle (-θ1) (FIG. 10). When using the first optical film strip (11) in which the optical axis (10) is perpendicular to the length direction, the angle (90 ° -θ) is used.
What is necessary is just to make it 1) (FIG. 11). In this case, the third side (BC) and the fourth side (AD) of the first optical film sheet (3) have an angle equal to the angle (φ3) with respect to the first side (AB) and the second side (DC). None, it forms an angle equal to (-θ1) with respect to the optical axis (10). The optical axis (20) of the second optical film strip (21) is parallel or perpendicular to the length direction.

The production method of the present invention is a method for producing an optical film laminated chip (9) from the first optical film sheet (3) and the second optical film strip (21). The sheet (3) is first cut along the first cutting line (C1) and along the second cutting line (C2) (FIGS. 1, 3, 5, and 7).

The first cutting line (C1) is a relative angle (θ) to the first side (AB) of the first optical film sheet (3).
Or, it is a straight line making an angle (φ1) equal to (θ + 90 °).

The angle (φ1) is such that the first side (AB) and the second side (DC) of the first optical film sheet (3) are parallel to the optical axis (10), The body (21) is equal to the relative angle (θ) when the optical axis (20) is parallel to its length direction (FIG. 1) and the first side of the first optical film sheet (3). (AB)
And the second side (DC) is parallel to its optical axis (10), and the second optical film strip (21) has the optical axis (20) perpendicular to its length. ,
Equal to the relative angle (θ + 90 °) (FIG. 3), the first side (AB) and the second side (DC) of the first optical film sheet (3) are perpendicular to its optical axis (10), When the optical axis (20) is parallel to the length direction of the second optical film strip (21), the relative angle (θ +
90 °) (FIG. 5), the first side (AB) and the second side (DC) of the first optical film sheet (3) are perpendicular to its optical axis (10) and the second optical The film strips (21) are each selected to be equal to the relative angle (θ) when the optical axis (20) is perpendicular to its length direction (FIG. 7).

The first cutting line (C1) intersects the third side (BC) of the first optical film sheet (3). The first cutting line (C1) may cross the first side (AB), may cross the fourth side (AD), and may cross the first side (A
It may pass through the vertex (A) of the first optical film sheet (3), which is the intersection of B) and the fourth side (AD).

The second cutting line (C2) corresponds to the first cutting line (C1).
Is a straight line parallel to. This second cutting line (C2)
Intersects the fourth side (AD) of the first optical film sheet (3). The second cutting line (C2) may cross the second side (DC) or may cross the third side (BC), and the second cutting line (C2) may intersect the second side (DC) and the third side (BC). It may pass through the vertex (C) of the first optical film sheet (3) which is the intersection. The distance (L1) between the first cutting line (C1) and the second cutting line (C2) may be approximately equal to the width (W2) of the second optical film strip (21). Second cutting line (C2)
Intersects at an angle (φ2) with the second side (DC),
This angle (φ2) is equal to the angle (φ1) (FIGS. 1, 3,
5 and 7).

In order to cut the first optical film sheet (3) along the first cutting line (C1) and the second cutting line (C2), the first optical film sheet (3) may be cut by an ordinary method using a roll cutter or the like. . The order of cutting is not particularly limited, and may be cut along the second cutting line (C2) after cutting along the first cutting line (C1), or may be cut along the second cutting line (C2). After cutting along the first cutting line (C1), it may be cut along the first cutting line (C1), and simultaneously along the second cutting line (C2) when cutting along the first cutting line (C1). Good.

The first cutting line (C1) and the second cutting line (C
By cutting the first optical film sheet (3) along 2), a first optical film cut sheet (4) is obtained. The first optical film cut sheet (4) has at least four sides, that is, a first side (EF), a second side (HG), a third side (FC), and a fourth side (AH). The first side (EF) is a side formed by cutting the first optical film sheet (3) along the first cutting line (C1). The second side (HG) is a side formed by cutting the first optical film sheet (3) along the second cutting line (C2). First side (EF) and second side (HG)
Are parallel to each other, and the distance between them is the first cutting line (C
It is equal to the distance (L1) between 1) and the second cutting line (C2). The first side (EF) and the second side (HG) are relative angles (θ) (FIGS. 1, 5) or (θ + 90 °) with respect to the optical axis (10) of the first optical film (FIGS. 3, 7). Angle).

The third side (FC) is a side corresponding to a part of the third side (BC) of the first optical film sheet (3).
The fourth side (AH) is the fourth side (A) of the first optical film sheet.
D) is a side corresponding to a part of D). When the third side (BC) and the fourth side (AD) of the first optical film sheet are parallel to each other and form an angle (φ3) with respect to the first side (AB) and the second side (DC). Has a third side (FC) and a fourth side (A) in the first optical film sheet (4).
H) are parallel to each other and make an angle equal to (−θ1) or (180 ° −θ1) with respect to the optical axis (10) of the first optical film.

The first optical film cut sheet (4) is
At least six sides, that is, a first side (EF) and a second side (H
G), a third side (FC), a fourth side (AH), and a fifth side (AE) and a sixth side (GC). The fifth side (AE) is a side corresponding to at least a part of the first side (AB) in the first optical film sheet (3).
The sixth side (GC) is a side corresponding to at least a part of the second side (DC) in the first optical film sheet (3). The fifth side (AE) and the sixth side (GC) are parallel to each other. The fifth side (AE) and the sixth side (GC) are parallel (FIGS. 1, 3) or perpendicular (FIGS. 5, 7) to the optical axis (10) of the first optical film.

Next, the obtained first optical film cut sheet (4) is laminated on the second optical film strip (21), and the second optical film strip (21) is laminated on the first optical film cut sheet (21). Cut along the shape of 4) (FIGS. 2, 4, 6, and 8).

For laminating the first optical film cut sheet (4) on the second optical film strip (21), for example, an adhesive is used, and the adhesive is usually an acrylic pressure-sensitive adhesive, urethane. A transparent and optically isotropic pressure-sensitive adhesive (adhesive) such as a system pressure-sensitive adhesive is used. Such an adhesive is generally used as the first optical film sheet (3) or the first optical film strip (1) as a raw material thereof.
1) or the second optical film strip (21) is applied in advance to one surface and provided as an adhesive layer, and its thickness is usually about 10 to 40 μm.

At the time of lamination, the first optical film cut sheet (4) has a first side (EF) along one edge (IJ) of the second optical film strip (21) and a second side (HG). Are laminated along the other edge (KL) of the second optical film strip (21). Both edges (IJ, K
L) is parallel to the length direction of the second optical film band state (21).

The second optical film strip (21) may be cut by an ordinary method using, for example, a roll cutter or the like.

The step of laminating the first optical film cut sheet (4) on the second optical film strip (21) may be performed after cutting the second optical film strip (21). When the film has a higher rigidity than the second optical film, the first optical film cut sheet (4) is easily laminated with the first optical film without causing wrinkles on the second optical film. Is laminated on the second optical film strip (21), and then the second optical film (21) is preferably cut.

Thus, an optical film laminate (5) is obtained. The optical film laminate (5) shown in each of FIGS. 2, 4, 6, and 8 has a first optical film (15) and a second optical film (25) laminated, and at least 4
Sides, ie, first side (EF), second side (HG), third side (F
C) and a fourth side (AH). The first side (E
F) and the second side (HG) are the first side (EF) and the second side (H) in the first optical film cut sheet (4).
G), which is parallel (FIGS. 2 and 6) or perpendicular (FIGS. 4 and 8) to the optical axis (20) of the second optical film and parallel to each other. The third side (FC) and the fourth side (AH) correspond to the third side (FC) and the fourth side (AH) in the first optical film cut sheet (4).
Third side (BC) as first optical film sheet (3)
When a sheet whose fourth side (AD) forms an angle (φ3) with the first side (AB) and the second side (DC) is used, the third side (FC) and the fourth side (AH) ) Are at an angle equal to (−θ1) or (180 ° −θ1) with respect to the optical axis (10) of the first optical film, and are parallel to each other.

The optical film laminate (5)
At least six sides, that is, a first side (EF) and a second side (H
G), a fifth side (AE) and a sixth side (GC) in addition to the third side (FC) and the fourth side (AH). The fifth side (AE) and the sixth side (GC) correspond to the fifth side (AE) in the first optical film cut sheet, and the sixth side (GC) is the sixth side (GC) in the first optical film cut sheet. GC), which is parallel (FIGS. 2 and 4) or perpendicular (FIGS. 6 and 8) to the optical axis (10) of the first optical film and parallel to each other.

In the optical film laminate (5), the first side (AB) and the second side (DC) of the used first optical film sheet (3) are parallel to the optical axis (10). And the optical axis (2) of the second optical film strip (21).
0) is parallel to the length direction and the relative angle (θ) is 50 ° or less or 130 ° or more, preferably 45 ° or less, 135 ° or more, more preferably 40 ° or less and 140 ° or more (FIG. 2), first optical film sheet (3)
The first side (AB) and the second side (DC) are parallel to the optical axis (10), and the optical axis (20) of the second optical film strip (21) is in the longitudinal direction. Vertical, and the relative angle (θ) is 40 ° or more and 140 ° or less, preferably 45 ° or more and 135 ° or less, more preferably 50 ° or less.
When the angle is equal to or more than 130 ° or less (FIG. 4), the first side (AB) and the second side (DC) of the first optical film sheet (3).
Are perpendicular to the optical axis (10), the optical axis (20) of the second optical film strip (21) is parallel to the length direction, and the relative angle (θ) is 40 ° or more and 140 ° or more. °
Or less, preferably 45 ° to 135 °, more preferably 50 ° to 130 ° (FIG. 6), or the first side (AB) and the second side (DC) of the first optical film sheet (3). ) Is perpendicular to the optical axis (10) and the optical axis (2) of the second optical film strip (21).
0) is perpendicular to the length direction and the relative angle (θ) is 50 ° or less or 130 ° or more, preferably 45 ° or less, 135 ° or more, more preferably 40 ° or less and 140 ° or more (FIG. 8) In the optical film sheet (3)
Since the portions that are at an acute angle from (the vicinity of the vertex B and the vicinity of the vertex D) are previously cut and separated by the first cutting line (C1) and the second cutting line (C2), the shape does not become elongated, Easy handling such as carrying.

Next, the optical film laminate (5) is cut to obtain a desired rectangular optical film laminate chip (9) (FIG. 9 (a)).

The third side (F) of the optical film laminate (5)
C) and the fourth side (AH) are at an angle (−θ1) or (180 ° −θ) with respect to the optical axis (10) of the first optical film.
In the case of 1), the optical film laminate (5) is cut along a cutting line (C5) perpendicular to a cutting line (C4) parallel to the third side (FC) and the fourth side (AH). 9) (FIG. 9A), the angle formed by the optical axis (10) of the first optical film with respect to the reference side (91) is (θ1).
And a square optical film laminated chip (9) in which the angle formed by the optical axis (20) of the second optical film is (θ2).
Can be obtained. Therefore, the third side (FC) and the fourth side (AH) can be used as reference lines for starting cutting of the rectangular optical film laminated chip (9) for the purpose (FIG. 9A).

The cutting is performed along a cutting line (C4) parallel to the third side (FC) and the fourth side (AH) to obtain a strip-shaped optical film laminate (6). FIG.
(c)), which may then be cut. Further, the optical film is cut along a cutting line (C5) perpendicular to the third side (FC) and the fourth side (AH) to obtain a strip-shaped optical film laminate (6) (FIG. 9B). ), Which may then be cut. If the strip-shaped optical film laminate (6) has a shape in which one of its corners is notched, the front and back are not mistaken (FIGS. 9B and 9C). Further, by a cutting method using a Thomson blade or the like, the third side (FC) and the fourth side (AH)
May be simultaneously cut along a cutting line (C4) parallel to and a cutting line (C5) perpendicular thereto to obtain a square optical film laminated chip (9).

[0040]

According to the production method of the present invention, the first optical film sheet (3) is cut along the first cutting line (C1) and the second cutting line (C2), so that the optical film laminate ( Since the shape of 5) is not elongated, handling such as transportation is easy. Also, an optical film laminate (5)
The third side (FC) and the fourth side (AH) of (18) are (-θ1) or (18) with respect to the optical axis (10) of the first optical film.
If the angle is equal to 0 ° -θ1), the third side (FC) and the fourth side (AH) can be used as reference lines for starting cutting of the optical film laminated chip (9). Cutting can be easily performed.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an example of a step of obtaining a first optical film cut sheet from a first optical film sheet in the production method of the present invention.

FIG. 2 is a schematic view showing an example of a step of obtaining an optical film laminate from a first optical film cut sheet and a second optical film strip in the production method of the present invention.

FIG. 3 is a schematic view showing an example of a step of obtaining a first optical film cut sheet from a first optical film sheet in the production method of the present invention.

FIG. 4 is a schematic view showing an example of a step of obtaining an optical film laminate from a first optical film cut sheet and a second optical film strip in the production method of the present invention.

FIG. 5 is a schematic view showing an example of a step of obtaining a first optical film cut sheet from a first optical film sheet in the production method of the present invention.

FIG. 6 is a schematic view showing an example of a step of obtaining an optical film laminate from a first optical film cut sheet and a second optical film strip in the production method of the present invention.

FIG. 7 is a schematic view showing an example of a step of obtaining a first optical film cut sheet from a first optical film sheet in the production method of the present invention.

FIG. 8 is a schematic view showing an example of a step of obtaining an optical film laminate from a first optical film cut sheet and a second optical film strip in the production method of the present invention.

FIG. 9 is a schematic view showing an example of a step of obtaining an optical film laminated chip from an optical film laminated body in the production method of the present invention.

FIG. 10 is a schematic view showing an example of a step of obtaining a first optical film sheet from the first optical film strip.

FIG. 11 is a schematic view showing an example of a step of obtaining a first optical film sheet from a first optical film strip.

FIG. 12 shows a reference side of the optical film laminated chip,
FIG. 3 is a diagram illustrating a relationship between an optical axis of a first optical film and an optical axis of a second optical film.

FIG. 13 is a schematic diagram showing an example of a conventional optical film laminate and a method for producing the same.

FIG. 14 is a schematic view showing an example of a conventional optical film laminate and a method for producing the same.

[Explanation of symbols]

10: Optical axis of first optical film (polarizing film) 11: First optical film (polarizing film) strip 15: First optical film (polarizing film) 19: First optical film (polarizing film) 20: Second optical Optical axis of film (retardation film) 21: Second optical film (retardation film) strip 25: Second optical film (retardation film) 29: Second optical film (retardation film) 3: First optical film Sheet 4: First optical film cut sheet 5: Optical film laminate 6: Strip-shaped optical film laminate 9: Optical film laminate chip C1: First cutting line C2: Second cutting line C3: Cutting line C4: Cutting line C5: cutting line L1: distance between first cutting line and second cutting line W2: width of second optical film strip θ: first in optical film laminated chip Angle relative to the optical axis of the second optical film with respect to the optical axis of the optical film θ1: the angle formed by the optical axis of the first optical film with respect to the reference side of the optical film laminated chip θ2: the second optical film relative to the reference side of the optical film laminated chip Φ: the angle formed by the first cutting line to the first side of the first optical film sheet φ2: the angle formed by the second cutting line to the second side of the first optical film sheet φ3: the first optical film Angle formed by the third and fourth sides with respect to the first and second sides of the sheet

Claims (10)

[Claims] 1. A rectangular optical film laminated chip (9) comprising a first optical film (19) and a second optical film (29) laminated on a first side (AB) and a second side (DC). ,
A third side (BC) and a fourth side (AD), the first side (AB) and the second side (DC) being parallel to each other and parallel or perpendicular to its optical axis (10). This is a method of manufacturing from one optical film sheet (3) and a second optical film strip (21) whose optical axis (20) is parallel or perpendicular to its length direction, and comprises a first optical film sheet ( 3) is the angle (φ1) equal to the relative angle (θ) or (θ + 90 °) of the optical axis (20) of the second optical film to the optical axis (10) of the first optical film in the optical film laminated chip (9). Is the first side (AB)
And the first cutting line (C) crossing the third side (BC)
1) and a distance (L) equal to the width (W2) of the second optical film strip with respect to the cutting line (C1).
1) is separated and parallel, cut along the second cutting line (C2) intersecting the fourth side (AD), and cut along the first cutting line (C1) to form the first side ( EF), and the second side (H) cut along the second cutting line (C2).
G), the third side (BC) of the first optical film sheet (3)
And the fourth side (AH) corresponding to a part of the fourth side (AD) of the first optical film sheet (3), and the first side (EF). And the second side (H
G) is θ or θ + 90 ° with respect to the optical axis (10).
Is obtained, and the obtained first optical film cut sheet (4) is applied to the second optical film strip (21) by the first optical film cut sheet (4). )), The first side (EF) and the second side (HG) are laminated along both edges (IJ, KL) of the second optical film strip (21), and the second optical film strip (21). Is cut along the shape of the first optical film cut sheet (4), the first side (EF) corresponding to the first side (EF) of the first optical fill cut sheet (4), the first optical film The second side (HG) corresponding to the second side (HG) of the cut sheet (4), the third side (FC) corresponding to the third side (FC) of the first optical film cut sheet (4), and the first side Optical film cut sheet (4)
Has a fourth side (AH) corresponding to the fourth side (AH), and the first side (EF) and the second side (HG) are parallel or perpendicular to the optical axis (20) of the second optical film. A method for producing an optical film laminated chip (9), comprising: obtaining an optical film laminated body (5), and cutting the obtained optical film laminated body (5). 2. The third side (BC) and the fourth side (AD) of the first optical film sheet (3) are (-θ1) or (−θ1) with respect to the first side (AB) and the second side (DC). 90 ° -θ
1) [Here, θ1 indicates an angle formed by the optical axis (10) of the first optical film with respect to the reference side (91) in the optical film laminated chip (9). And the resulting optical film laminate (5) is cut parallel to the third side (FC) and the fourth side (AH) at an angle (φ3) equal to 2. The manufacturing method according to claim 1, wherein cutting is performed along a cutting line (C5) which is perpendicular to C4). 3. The first optical film sheet (3) has a first optical film strip (11) whose optical axis (10) is parallel or perpendicular to the longitudinal direction and is angled with respect to the longitudinal direction. The method according to claim 2, wherein the sheet is obtained by cutting along a cutting line (C3) forming (φ3). 4. The first optical film sheet (3) has a first side (AB) and a second side (DC) parallel to its optical axis (10) and a second optical film strip (21). The method according to claim 1, wherein the optical axis (20) is parallel to the length direction and the relative angle (θ) is 50 ° or less or 130 ° or more. 5. The first optical film sheet (3) has a first side (AB) and a second side (DC) parallel to its optical axis (10) and a second optical film strip (21). ) Whose optical axis (20) is perpendicular to the length direction and whose relative angle (θ) is 40 ° or more and 140 ° or less.
The production method described in 1. 6. The first optical film sheet (3) has a first side (AB) and a second side (DC) perpendicular to its optical axis (10) and a second optical film strip (21). ) Whose optical axis (20) is parallel to the length direction and whose relative angle (θ) is 40 ° or more and 140 ° or less.
The production method described in 1. 7. The first optical film sheet (3) has a first side (AB) and a second side (DC) perpendicular to its optical axis (10) and a second optical film strip (21). The method according to claim 1, wherein the optical axis (20) is perpendicular to the length direction and the relative angle (θ) is 50 ° or less or 130 ° or more. 8. A first optical film (15) and a second optical film (25) are laminated and have a first side (EF), a second side (HG), a third side (FC), and a fourth side. Side (AH), a fifth side (AE) and a sixth side (GC), and the fifth side (A
E) and the sixth side (GC) are parallel or perpendicular to the optical axis (10) of the first optical film, and the first side (E)
F) and the second side (HG) being parallel or perpendicular to the optical axis (20) of the second optical film (5). 9. An optical film laminate (5) for cutting out a rectangular optical film laminated chip (9) in which a first optical film (19) and a second optical film (29) are laminated, One optical film (15) and a second optical film (25) are laminated, and a first side (EF),
Second side (HG), third side (FC) and fourth side (AH)
And the third side (FC) and the fourth side (AH) are (-θ1) or 180 ° -θ1 with respect to the optical axis (10) of the first optical film [where θ1 is an optical film laminated chip The angle formed by the optical axis (10) of the first optical film with respect to the reference side (91) in (9) is shown. ], And the first side (EF) and the second side (HG)
Is an optical film laminate (5), which is parallel or perpendicular to the optical axis (20) of the second optical film. 10. A cut perpendicular to a cutting line (C4) parallel to the third side (FC) and the fourth side (AH) of the optical film laminate (5) according to claim 9. A method for producing a rectangular optical film laminated chip, comprising cutting along a line (C5).