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Polarizing plate and display device provided with same

A technology for display devices and polarizers, applied in polarizing elements, instruments, cellulose plastic material layered products, etc., can solve problems such as difficulty in obtaining information

Inactive Publication Date: 2015-12-30
KONICA MINOLTA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially in car navigation, car equipment, aircraft panel, mobile phone, PDA (PersonAlDigitAlAssistAnt; mobile information terminal), electric reel for fishing, fish finder, etc. where there are many opportunities to observe while wearing polarized sunglasses, sometimes difficult to obtain information

Method used

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  • Polarizing plate and display device provided with same
  • Polarizing plate and display device provided with same
  • Polarizing plate and display device provided with same

Examples

Experimental program
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Effect test

preparation example Construction

[0112] 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.

[0113] (delay modifier)

[0114] As the compound added for retardation adjustment, an aromatic compound having two or more aromatic rings as described in European Patent No. 911,656A2 can be used.

[0115] In addition, two or more aromatic compounds may be used in combination. The aromatic ring of the aromatic compound contains an aromatic heterocyclic ring in addition to the aromatic hydrocarbon ring. Especially preferably, it is an aromatic heterocycle, and an aromatic heterocycle is usually an unsaturated heterocycle. Among them, a 1,3,5-triazine ring is particularly preferable.

[0116] (polymer or oligomer)

[0117] The cellulose ester film in this embodiment preferably contains cellulose ester and an olefin having a substituent selected from a carboxyl group, a hydro...

Embodiment 1

[0566] [Production of λ / 4 membrane]

[0567] use image 3 In the production apparatus shown, the elongated film C is stretched so that the orientation angle θ becomes 45° to produce a long obliquely stretched film which is a λ / 4 film. The conveying speed of the long film was set at 25 m / min. The end of the long obliquely stretched film discharged from the stretching device is trimmed to adjust the film width of the final elongated diagonally stretched film. The film thickness of the λ / 4 film was 30 μm, and Ro was 138 nm.

[0568] [Making of protective film]

[0569] The preparation of the following acrylic resins containing lactone ring units was carried out. That is, according to the production example 1 of Japanese Patent Application Laid-Open No. 2008-9378 [0222] to [0224], 7500 g of methyl methacrylate and 2500 g of methyl 2-(hydroxymethyl) acrylate were synthesized to obtain the lactonization rate 98%, Tg=134°C acrylic resin.

[0570] The prepared above-mentioned ac...

Embodiment 2

[0615] In Example 2, the polarizing plate was produced in the same manner as in Example 1 except that the λ / 4 film and the protective film were bonded to the polarizer using an ultraviolet curing adhesive (UV adhesive).

[0616] [Preparation of UV Curable Adhesive 1]

[0617] After mixing the following components, defoaming was performed to prepare an ultraviolet curable adhesive liquid 1 . In addition, triarylsulfonium hexafluorophosphate was blended as a 50% propylene carbonate solution, and the solid content of triarylsulfonium hexafluorophosphate is shown below.

[0618]

[0619] "Making of Polarizers"

[0620] First, a corona discharge treatment is applied to the surface of the λ / 4 film. In addition, the conditions of the corona discharge treatment were 2.0 kW of corona output intensity, and 18 m / min of linear velocity. Next, the above-prepared UV-curable adhesive liquid 1 was coated on the corona-discharge-treated surface of the λ / 4 film using a bar coater so that ...

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Abstract

The invention provides a polarizing plate and a display device provided with the same. The polarizing plate (12), wherein a lambda / 4 film (23) and a cured layer (24) which comprises a UV-curable resin are layered in this order on one side of a polarizer (21) via an adhesive layer (22). The thickness of the lambda / 4 film (23) is 10 [mu]m to 70 [mu]m. The adhesive layer (22) bonds the polarizer (21) and the lambda / 4 film (23) by a state change from a liquid state. The cured layer (24) includes an organic compound having a UV-absorbing function.

Description

technical field [0001] The present invention relates to a polarizer having a λ / 4 film and a cured layer made of an ultraviolet curable resin on one surface side of a polarizer, and a display device including the polarizer. Background technique [0002] Currently, polarized sunglasses are known as means for reducing incident light. Polarized sunglasses are constructed by sandwiching a polarizing film between two lenses. Of the incident light, only linearly polarized light parallel to the transmission axis (perpendicular to the absorption axis) of the polarizing film passes through the polarizing film. Therefore, by attaching polarized sunglasses, the degree of glare can be reduced. [0003] When viewing a liquid crystal display device with such polarized sunglasses attached, the screen may appear dark or distorted depending on the model or viewing angle. This is caused by the deviation between the transmission axis of the polarizing plate arranged on the viewing side of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30B32B7/02B32B23/04
CPCG02B1/11G02B5/3033G02B5/305B32B23/04G02F1/133528G02B5/3083G02F1/133638C09J129/02G02F1/13363
Inventor 稻垣真治
Owner KONICA MINOLTA INC
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