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Polarizing plate and display device

A technology for display devices and polarizers, applied in identification devices, polarizing elements, applications, etc., can solve problems such as frequent polarizer fusing, and achieve the effect of efficient manufacturing

Active Publication Date: 2020-03-31
ZEON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when attempting to manufacture such a thin polyvinyl alcohol polarizer using a conventional manufacturing method, melting of the polarizer frequently occurs.

Method used

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  • Polarizing plate and display device
  • Polarizing plate and display device
  • Polarizing plate and display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0063] [Embodiment 1: Polarizer]

[0064] [1. Outline of Polarizer]

[0065] The polarizing plate of the present invention includes a polarizer and a base film. The polarizing plate is a polarizing plate obtained by stretching a specific laminated body. This particular laminate includes a polarizer material film and an unstretched substrate film.

[0066] The polarizer material film of the laminate is a film obtained by stretching a raw material film. In the stretching operation of the laminate, by further stretching the polarizer material film, the polarizer material film can become a polarizer. That is, the raw material film is stretched to become a polarizer material film, and as a result of further stretching the laminate, the polarizer material film can become a polarizer. However, the polarizer material film can be made into a polarizer through arbitrary operations such as dyeing other than stretching.

[0067] As a result of the stretching of the laminate, the unst...

Embodiment approach 2

[0139] [Embodiment 2: Polarizing plate]

[0140] refer to Figure 5 A polarizing plate according to Embodiment 2 of the present invention will be described.

[0141] Figure 5 It is a cross-sectional view schematically showing polarizing plate 120 according to Embodiment 2 of the present invention. In this polarizer 120, as Figure 5 As shown, the base film 112 is laminated on one surface (the upper surface in the figure) of the polarizer 111 , and the protective film 115 is laminated on the other surface (the lower surface in the figure) of the polarizer 111 . Figure 5 113 and 114 are adhesive layers. As the adhesive for bonding the protective film to the polarizer, the same adhesive as the adhesive for bonding the base film to the polarizer can be used.

[0142] The manufacturing method of the polarizing plate 120 of the present embodiment includes the above-mentioned steps (a) and (b), a step (c) of stretching the laminate obtained through these steps in one or more d...

Embodiment approach 3

[0145] [Embodiment 3: Polarizer]

[0146] refer to Image 6 A polarizing plate according to Embodiment 3 of the present invention will be described.

[0147] Image 6 It is a cross-sectional view schematically showing polarizing plate 130 according to Embodiment 3 of the present invention. In this polarizer 130, as Image 6 As shown, the base film 112 is laminated on one surface (the upper surface in the figure) of the polarizer 111 , and the adhesive layer 116 is laminated on the other surface (the lower surface in the figure) of the polarizer 111 .

[0148] The method for producing a polarizing plate according to this embodiment includes the above-mentioned steps (a) and (b), a step (c) of stretching the laminate obtained through these steps in one or more directions, and using a dichroic substance The step (d) of dyeing the polarizer material film further includes the step (e2) of providing an adhesive layer on the polarizer after the step (c).

[0149] As the adhesive...

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Abstract

A polarizing plate including a polarizer and a base material film is disclosed. The polarizing plate comprises a stretched laminate. The laminate includes a polarizer material film and an unstretchedbase material film. The polarizer material film comprises a stretched original film. The polarizer includes a dichroic material and has a thickness T of no more than 20 [mu]m and a retardation Re in the in-plane direction of the base material film in the polarizing plate of no more than 20 nm. The laminate may further include an adhesive layer between the polarizer material film and the unstretched base material film.

Description

technical field [0001] The invention relates to a polarizer and a display device. Background technique [0002] Display devices such as liquid crystal display devices and organic electroluminescence (EL) display devices have been required to have a large display area, light weight, and thin thickness. Therefore, panels constituting display devices have been required to be thin. [0003] A polarizing plate having a polarizer and a protective film protecting the polarizer is generally used in a display device. In order to constitute a thin display device, the polarizing plate is also required to be thinner. In particular, materials such as polyvinyl alcohol generally used as polarizers may shrink in the environment in which the display device is used. Therefore, in a thin and large display device, warping due to such shrinkage may become a problem. Therefore, by employing a polarizer as thin as 10 μm or less, in addition to the reduction in the thickness of the display devi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G02F1/1335G09F9/00G09F9/30
CPCG02B5/305G02B1/14G09F9/35G02F1/133528H10K59/8791G02B5/30G02F1/1335G09F9/30B29D11/00644H10K50/86
Inventor 真岛启猪股贵道
Owner ZEON CORP