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Polarizing plate and optical display apparatus including the same

A polarizing plate, polarizer technology, applied in the field of polarizing plates and optical displays containing it, can solve problems such as insufficient protection against external light reflection, low side reflection visibility, etc.

Active Publication Date: 2014-06-18
CHEIL IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, a polarizing plate capable of realizing circular polarization using only a single λ / 4 retardation film has problems of low side reflection visibility and insufficient prevention of reflection of external light

Method used

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  • Polarizing plate and optical display apparatus including the same
  • Polarizing plate and optical display apparatus including the same
  • Polarizing plate and optical display apparatus including the same

Examples

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Embodiment 1 and 2

[0064] The polarizer is prepared by dyeing a material used for the polarizer, followed by stretching or the like. Specifically, after stretching a polyvinyl alcohol film to a length twice its original length at 50°C, iodine was adsorbed onto the stretched polyvinyl alcohol film, and then the film was stretched in a boric acid solution at 40°C to the desired length. A polarizer (thickness: 22 μm) was prepared by stretching to a length 2.5 times the length of the film after stretching.

[0065] A protective film and a λ / 2 retardation film were stacked on and under the polarizer, respectively, via a bonding agent (Z-320, Daiichi Kigenso Kagaku Kogyo Co., Ltd.). Using each adhesive having a refractive index as listed in Table 1, a λ / 4 retardation film was stacked under the λ / 2 retardation film, thereby preparing a polarizing plate. The adhesive layer had a thickness of 15 μm.

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Abstract

A polarizing plate includes a ([lambda] / 2) retardation film, a ([lambda] / 4) retardation film, and an adhesive layer stacked between the ([lambda] / 2) retardation film and the ([lambda] / 4) retardation film. The ([lambda] / 2) retardation film may have a refractive index n1, the ([lambda] / 4) retardation film may have a refractive index n2, and the adhesive layer may have a refractive index n in the range of n1

Description

technical field [0001] The present invention relates to polarizing plates and optical displays comprising the same. Background technique [0002] Organic light-emitting diode (OLED) displays refer to self-emitting displays that emit light through electrical activation of fluorescent organic compounds. Such displays have advantages such as operation at low voltage, thin thickness, and the like. In addition, the OLED display solves the problems of a typical liquid crystal display in terms of wide viewing angle, fast response time, etc., and thus attracts attention in recent years. [0003] Generally, an OLED display includes a glass substrate, an organic electroluminescence part formed on the glass substrate, an encapsulation cover surrounding and protecting the organic electroluminescence part, and a water absorbent provided to the encapsulation cover. [0004] Unlike a liquid crystal display, an OLED display does not require a polarizing plate for the realization of a scre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30
CPCG02B5/3083G02B5/3008G02B5/3016G09F9/301G09G3/3208H05B33/02
Inventor 徐银卿高门甫金旼晶金龙云朴基皓猪股贵道
Owner CHEIL IND INC