Method for manufacturing optical film

A manufacturing method and optical film technology, applied in optics, optical components, instruments, etc., can solve problems such as poor productivity

Active Publication Date: 2015-11-11
KONICA MINOLTA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the transmission axis of the polarizer and the slow axis of the stretched film are tilted at a desired angle as described above, it is necessary to cut out a long polarizing film and / or stretched film at a specific angle and cut the film sheet Batch production in which one piece is bonded to each other reduces productivity

Method used

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  • Method for manufacturing optical film
  • Method for manufacturing optical film

Examples

Experimental program
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preparation example Construction

[0161] These compounds may be added together with the cellulose ester or the solvent at the time of preparation of the cellulose ester solution, or may be added during or after the preparation of the solution.

[0162] (delay modifier)

[0163] As the compound to be added to adjust the retardation, the aromatic compound having two or more aromatic rings described in the specification of European Patent No. 911,656A2 can be used.

[0164] In addition, two or more kinds of aromatic compounds may be used in combination. Among the aromatic rings of the aromatic compound, it is particularly preferable to contain an aromatic heterocyclic ring in addition to the aromatic hydrocarbon ring. The aromatic heterocycle is usually an unsaturated heterocycle. Among them, a 1,3,5-triazine ring is particularly preferable.

[0165] (polymer or oligomer)

[0166] The cellulose ester film in the present embodiment preferably contains cellulose ester and vinyls having a substituent selected fr...

Embodiment 1

[0376] The long diagonally oriented film A' composed of the COP film was wound by the film winding section 9. Figure 4 The shown film cutting device 8 (cutting member 8a) moves in the width direction and cuts it to a predetermined length. At this time, the long diagonal alignment film A' was cut with a tension of 5 N per unit length in the width direction applied along the longitudinal direction with respect to the long diagonal alignment film A'. In addition, in the cutting of the long diagonal alignment film A', the tension applied to the longitudinal direction is constant (5 N / m), and the blade of the cutting member 8a is earlier than the lower surface of the long diagonal alignment film A' into the upper surface.

[0377] (Manufacture of circular polarizer)

[0378] Next, the polyethanol film with a thickness of 120 μm was uniaxially stretched (temperature 110° C., stretching ratio 5 times), immersed in an aqueous solution composed of 0.075 g of iodine, 5 g of potassium i...

Embodiment 2

[0380] In Example 2, when cutting the long diagonally oriented film A' in the width direction, the tension applied to the longitudinal direction was 30 N per unit length in the width direction, and the tension during cutting was constant (30 N / m). Other than that, it is the same as Example 1.

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Abstract

The direction of orientation for a long inclined oriented film is inclined relative to the longitudinal direction and the direction of width. Let S1(m) be the length in the direction of width of a film (F) that includes the long inclined oriented film, and let Q(N) be the tension applied in the longitudinal direction to the film (F). In a state in which tension (Q) is applied to the film such that Q / S1 is 5 - 100 N / m, the film (F) is severed in the direction of width by a severing member (8a).

Description

technical field [0001] The present invention relates to an optical film manufacturing method for producing each optical film by cutting a long optical film including a long diagonally oriented film. Background technique [0002] Currently, a self-luminous display device such as an organic EL (electroluminescence) display device is attracting attention. In an organic EL display device, a reflector such as an aluminum plate is provided on the back side of the display in order to improve light extraction efficiency. Therefore, external light incident on the display is reflected by the reflector, which reduces the contrast of the image. [0003] Therefore, in order to prevent reflection of external light and improve the contrast between light and dark, there is known a technique of forming a circular polarizing plate by bonding a stretched film and a polarizer, and arranging the circular polarizing plate on the surface side of a display. At this time, the above-mentioned circul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30
CPCG02B5/305
Inventor 畠山晋平
Owner KONICA MINOLTA INC
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