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Diffusely-reflecting polarizer having substantially amorphous nano-composite major phase

A technology of nanocomposite materials and amorphous phases, which can be used in polarizing components, instruments, optics, etc., and can solve problems such as damage to the optical properties of diffuse reflective polarizers

Inactive Publication Date: 2011-08-31
SKC HAAS DISPLAY FILMS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As such, the optical performance of diffuse reflective polarizers can be compromised due to the limited possibility to tune the optical properties, especially the refractive index and birefringence

Method used

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  • Diffusely-reflecting polarizer having substantially amorphous nano-composite major phase
  • Diffusely-reflecting polarizer having substantially amorphous nano-composite major phase
  • Diffusely-reflecting polarizer having substantially amorphous nano-composite major phase

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Embodiment Construction

[0015] definition:

[0016] The terms "specular reflectance", "specular reflection", or "specular reflectance" Rs represent the reflectance of light entering a cone centered at the specular reflection angle and exiting at a vertex angle of 16 degrees. The terms "diffuse reflectance", "diffuse reflectance" or "diffuse reflectance" R d Indicates reflected light that lies outside the reflection cone above. The term "total reflectance", "total reflectance", or "total reflectance" R t Represents the sum of all light reflected from a surface. Therefore, the total reflection is the sum of the specular and diffuse reflections.

[0017] Similarly, the terms "specular transmittance" and "specular transmittance" T s In this context, it represents the transmitted ray entering an exit cone with an apex angle of 16 degrees centered on the specular direction. The terms "diffuse transmission" and "diffuse transmittance" T d Indicates the transmittance of all rays outside the reflection ...

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PUM

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Abstract

The present invention provides a diffusely reflecting polarizer comprising a layer containing: a first polymer being a substantially amorphous nano-composite material and being a major phase having a birefringence of less than about 0.02, and a second polymer being a dispersed minor phase within the first polymer major phase, the major and minor phases differing in index of refraction by more than about 0.05 along a first axis and by less than about 0.05 along a second axis orthogonal to said first axis; wherein the major phase comprises a continuous amorphous phase and at least one additional phase dispersed into domains within said continuous amorphous phase, the domains having characteristic dimensions smaller than the wavelength of light such that these domains do not contribute to scattering of light passing through the first polymer; wherein the diffuse reflectivity of said first and second polymers taken together along at least one axis for at least one polarization state of electromagnetic radiation is at least about 50%.

Description

technical field [0001] The present invention relates to a diffuse reflective polarizer comprising a film having a first polymer, and a second polymer dispersed in the first polymer, the first polymer being nearly isotropic substantially Amorphous nanocomposites. Background technique [0002] Reflective polarizing films transmit light of one polarization state and reflect light of the orthogonal polarization state. They can be used in LCDs to improve light efficiency. A number of films have been disclosed that perform the function of reflective polarizing films, among which diffuse reflective polarizers are more attractive because they eliminate the need for a diffuser in the LCD, thereby reducing the complexity of the LCD. U.S. Patent No. 5,783,120 discloses a diffusely reflective polarizing film comprising a film comprising an immiscible mixture having a first continuous phase (also referred to herein as a major phase, i.e., in an amount greater than that of the mixture)....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/02C08L67/02C08L67/00G02B5/30
CPCG02B5/0284G02B5/3008G02B1/04G02B5/0257G02B5/0242C08L23/18C08L25/10
Inventor J·格林纳周伟俊米向东
Owner SKC HAAS DISPLAY FILMS CO LTD