Manufacturing method of 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: 2018-02-09
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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  • Manufacturing method of optical film
  • Manufacturing method of optical film
  • Manufacturing method of 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 during 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 added for retardation adjustment, an aromatic compound having two or more aromatic rings described in European Patent No. 911,656A2 can be used.

[0164] In addition, two or more 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. An 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 this embodiment preferably contains cellulose ester and a vinyl group having a substituent selected from a carboxyl group, a hydroxyl group, an ami...

Embodiment 1

[0376] The elongated oblique orientation film A' made of the COP film is wound up by the film winding part 9 Figure 4The shown film cutting device 8 (cutting member 8a) moves in the width direction and cuts to a predetermined length. At this time, the elongated obliquely oriented film A' was cut with a tension of 5 N per unit length in the width direction applied along the longitudinal direction to the elongated obliquely oriented film A'. In addition, in the cutting of the elongated oblique alignment film A', the tension applied in the longitudinal direction was set to be constant (5 N / m), and the blade of the cutting member 8a moved earlier than the lower surface of the elongated oblique alignment film A'. into the upper surface.

[0377] (Manufacture of circular polarizer)

[0378] Next, a polyethylene film with a thickness of 120 μm was uniaxially stretched (at a temperature of 110° C. and a stretching ratio of 5 times), immersed in an aqueous solution composed of 0.075...

Embodiment 2

[0380] In Example 2, when the elongated oblique alignment film A' was cut along the width direction, the tension applied to the length direction was set to be 30 N per unit length in the width direction, and the tension was set to be constant during cutting (30 N / m). Other than that, it is the same as in 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] This invention relates to the optical film manufacturing method which cuts the elongated optical film which consists of elongated oblique alignment film, and manufactures each optical film. Background technique [0002] Currently, self-luminous display devices such as organic EL (electroluminescence) display devices are attracting attention. In an organic EL display device, a reflector such as an aluminum plate is provided on the rear side of the display in order to improve light extraction efficiency. Therefore, external light incident on the display is reflected by the reflector, resulting in a decrease in image contrast. [0003] Therefore, in order to prevent reflection of external light and improve the contrast between light and dark, there is known a technique of bonding a stretched film and a polarizer to form a circular polarizing plate, and arranging the circular polarizing plate on the front side of a display. At this time, the above-mention...

Claims

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Application Information

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