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Polarizing plate with optical compensation layer and organic el panel using same

A technology of optical compensation layer and polarizer, which is applied in the direction of optics, optical elements, polarizing elements, etc., can solve the problems of reduced manufacturing yield and adverse effects on display characteristics, and achieve the goal of suppressing adverse effects on display performance and excellent anti-reflection characteristics Effect

Active Publication Date: 2019-08-30
NITTO DENKO CORP
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, in such a circular polarizing plate, foreign substances that may be mixed in during the manufacturing process (not a problem for the λ / 2 plate and λ / 4 plate made of resin film) become bright spots, which may adversely affect the display characteristics. , and the problem of lower manufacturing yield

Method used

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  • Polarizing plate with optical compensation layer and organic el panel using same
  • Polarizing plate with optical compensation layer and organic el panel using same

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Embodiment 1

[0112] 1-1. Production of polarizer

[0113] A-PET (amorphous-polyethylene terephthalate) film (manufactured by Mitsubishi Plastics Co., Ltd., trade name: NOVACLEAR SH046, thickness 200 μm) was prepared as a substrate, and the surface was subjected to corona treatment (58W / m 2 / minute). On the other hand, prepared to add 1% by weight of acetoacetyl modified PVA (manufactured by Nippon Synthetic Chemical Industry Co., Ltd., trade name: GOHSEFIMER Z200, the degree of polymerization is 1200, the degree of saponification is 99.0% or more, the acetoacetyl modified 4.6% PVA (polymerization degree 4200, saponification degree 99.2%), coated so that the film thickness after drying becomes 12 μm, and dried by hot air drying in an atmosphere of 60°C for 10 minutes, and produced in A laminate in which a PVA-based resin layer is provided on a substrate. Next, this laminate was first stretched to 2.0 times at 130° C. in air to obtain a stretched laminate. Next, the step of insolubilizi...

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Abstract

Provided is a polarizing plate with an optical compensation layer, which is extremely thin and has excellent anti-reflection characteristics, while being suppressed in adverse effects on the display performance of an image display device caused by foreign substances. A polarizing plate with an optical compensation layer according to the present invention is sequentially provided with a polarizer,a first optical compensation layer and a second optical compensation layer in this order. The first optical compensation layer exhibits refractive index characteristics expressed by formula nx = nz >ny, while having an in-plane retardation Re(550) of from 220 nm to 320 nm. The second optical compensation layer exhibits refractive index characteristics expressed by formula nx > ny = nz, while having an in-plane retardation Re(550) of from 100 nm to 200 nm. The first optical compensation layer contains foreign substances; and the thickness of the first optical compensation layer is 1.5 [mu]m ormore. In addition, the surface of the first optical compensation layer is substantially flat.

Description

technical field [0001] The present invention relates to a polarizing plate with an optical compensation layer and an organic EL panel using the same. Background technique [0002] In recent years, with the spread of thin displays, displays (organic EL display devices) equipped with organic EL panels have been proposed. Since the organic EL panel has a highly reflective metal layer, problems such as reflection of external light and reflection of the background are prone to occur. As a general circular polarizing plate, a circular polarizing plate in which a polarizer and a λ / 2 plate and a λ / 4 plate made of a resin film are laminated is known. [0003] In recent years, expectations for flexibility and bendability of organic EL display devices have increased. In order to meet such demands, thinning circular polarizing plates is strongly desired, and circular polarizing plates in which a λ / 2 plate and a λ / 4 plate are formed of a coating layer of a liquid crystal compound have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G09F9/30H01L27/32H01L51/50H05B33/02
CPCH05B33/02G09F9/30G02B5/3016H10K2102/331H10K59/8791G02B5/30H10K50/868H10K2102/311
Inventor 梅本彩香喜多川丈治长谷川由纪
Owner NITTO DENKO CORP
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