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Optically anisotropic film

A technology of optical anisotropy and polarizing film, applied in optics, optical components, nonlinear optics, etc., can solve problems such as easy glass breakage, and achieve excellent visual recognition and thin thickness

Active Publication Date: 2020-07-14
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, glass not only has disadvantages such as being easy to break and being heavy, but also does not necessarily have sufficient material properties for thinning, lightening, and flexing in recent years.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0400] Using the optically anisotropic film 1 as the optically anisotropic film, set θa to 45° and θb to 0°, 30°, 60°, and 90° respectively, measure the single transmittance, perform visibility correction, and calculate visibility correction Monomer transmittance (Ty). The results are shown in Table 1. Even when θb is set to 0°, 30°, 60°, or 90°, Ty is maintained at 30% or more, and the visibility is good.

Embodiment 2

[0402] Except for using the optically anisotropic film 2 as the optically anisotropic film, the single transmittance was measured in the same manner as in Example 1, the visibility correction was performed, and the visibility corrected single transmittance (Ty) was calculated.

[0403] The results are shown in Table 2. Even when θb is set to 0°, 30°, 60°, or 90°, Ty is maintained at 30% or more, and the visibility is good.

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Abstract

An optically anisotropic film used in a front plate of a display device, wherein the optically anisotropic film includes a polyimide-based polymer and satisfies formula (1). (1): 80 nm <= Re(550) <= 160 nm [In the formula, Re(550) represents the in-plane phase difference for a wavelength of 550 nm.

Description

technical field [0001] The present invention relates to an optically anisotropic film usable as a front panel of a display device, a polarizing plate having the optically anisotropic film, a long polarizing plate formed by forming the polarizing plate in a long strip, and an optical The anisotropic film or the display device of the polarizing plate. Background technique [0002] Conventionally, glass has been used as a material for displays and the like of display devices. However, glass not only has the disadvantages of being easily broken and heavy, but also does not necessarily have sufficient material properties for thinning, weight reduction, and flexibility in recent years. Therefore, studies have been made on laminated films in which scratch resistance, flexibility, and the like are imparted to resins containing polyimide-based polymers (for example, Patent Document 1). [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Internation...

Claims

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Application Information

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IPC IPC(8): G02B5/30G02F1/1335G02F1/13363G09F9/00G09F9/30H01L27/32H01L51/50H05B33/02
CPCH05B33/02G02B5/30G02F1/1335G02F1/13363G09F9/00G09F9/30H10K59/8722H10K59/8791G02B5/305G02B5/3083C08J5/18C08J2379/08
Inventor 村野耕太幡中伸行唐泽真义
Owner SUMITOMO CHEM CO LTD
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