Polarization-maintaining optical film and preparation method thereof

An optical film, polarization-maintaining matrix technology, applied in optics, optical components, nonlinear optics, etc., can solve problems such as depolarization, improve utilization, ensure high transmission, and cost-effective effects.

Active Publication Date: 2022-03-01
NINGBO EXCITON TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In order to solve the problem that the optical film in the traditional backlight will produce serious depolarization phenomenon in the polarization light source enhancement scheme, the present invention provides a polarization-maintaining optical film and its preparation method

Method used

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  • Polarization-maintaining optical film and preparation method thereof
  • Polarization-maintaining optical film and preparation method thereof
  • Polarization-maintaining optical film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] The invention provides a polarization maintaining optical film, such as Figure 7 As shown, the polarization-maintaining optical film is a polarization-maintaining diffusion film, the first structural layer 51 is an atomized layer DL (Diffusion layer), and the second structural layer 52 does not exist. The thickness T of the base layer 50 is 250 μm, the material of the polarization maintaining base layer is selected from PC, optically isotropic, the degree of polarization >99%, and the haze of the polarization maintaining diffusion film is 98%. The haze of the first atomized layer is 98%, and the type of the atomized layer is particle coating, which is composed of transparent polymer resin PU and transparent polymer particles PMMA, and the particle size d is 5-15 μm. The refractive index na of the transparent polymer resin is 1.5. The polarization maintaining degree of the polarization maintaining diffusion film is 82%.

Embodiment 2

[0095] Such as Figure 7 As shown, the polarization maintaining optical film provided by the present invention includes a first structural layer 51, a polarization maintaining base layer 50 and a second structural layer 52, the first structural layer is located on the upper surface of the base layer 50, and the second structural layer is located on the base layer 50 On the lower surface, the polarization-maintaining optical film is a polarization-maintaining diffusion film, the first structural layer 51 is an atomized layer, and the second structural layer 52 is an atomized layer. The thickness T of the base layer 50 is 250 μm, the material of the polarization maintaining base layer is selected from PC, optically isotropic, the degree of polarization >99%, and the haze of the polarization maintaining diffusion film is 98%. The haze of the first atomized layer is 98%, and the type of the atomized layer is particle coating, which is composed of transparent polymer resin PU and t...

Embodiment 3-20

[0097] For the polarization maintaining diffusion film provided in Example 1, other parameters are listed in Table 1.

[0098] Design parameters and optical properties of the polarization-maintaining diffusion film provided in Table 1 Examples 1-20

[0099]

[0100]

[0101] Note 1: T is the thickness of the polarization maintaining matrix layer.

[0102] As shown in Table 1, there are examples of polarization maintaining diffusion films with different materials and design parameters. It can be found that when the material of the base layer is the polarization-maintaining matrix such as PC, PMMA, TAC, COP, the polarization-maintaining degree of the prepared polarization-maintaining diffusion film is greater than 80%, and the thickness T has little influence. When the haze of the atomized layer decreases, the degree of polarization retention will increase, but the type of atomized layer, resin, and particle material have little effect on it. When the second structural l...

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Abstract

The invention relates to a polarization-maintaining optical film, in particular to a polarization-maintaining optical film applied to an LCD (liquid crystal display) linear polarization backlight source and a preparation method of the polarization-maintaining optical film. The invention provides a polarization-maintaining optical film and a preparation method thereof in order to solve the problem of depolarization of an optical film in traditional backlight in a polarization light source synergistic scheme. The polarization-maintaining optical film comprises a polarization-maintaining substrate layer, a first structural layer and / or a second structural layer, the first structural layer is located on the upper surface of the substrate layer, and the second structural layer is located on the lower surface of the substrate layer. When linearly polarized light in LCD backlight passes through the polarization-maintaining optical film, the higher incident light polarization degree can be kept, the polarization-maintaining degree is larger than 80%, it is ensured that the linearly polarized light finally penetrates through a lower polaroid of an LCD highly, and the utilization rate of a backlight source is greatly increased.

Description

technical field [0001] The invention relates to a polarization-maintaining optical film, in particular to a polarization-maintaining optical film applied to an LCD linear polarization backlight source and a preparation method thereof. Background technique [0002] In the field of traditional liquid crystal display (LCD), the display of liquid crystal panel needs the backlight module to provide light source for it. Through various optical films and light guide plates in the backlight module, the LED point light source can be converted into a uniform plane light source. However, the light energy of the planar light source actually has a very low utilization rate for the liquid crystal panel. [0003] One of the reasons is that the transmittance of the lower polarizer (13) of the liquid crystal panel is only 40% (as shown in Table 1). Since the conversion efficiency from point light source to surface light source varies greatly depending on the backlight design (direct-lit or ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30G02B1/10G02F1/1335
CPCG02B5/305G02B1/10G02F1/133528G02B5/30G02F1/1335G02B5/02
Inventor 唐海江夏寅赵国林缪锴王小凯付坤钟林李刚张彦
Owner NINGBO EXCITON TECH
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