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Optical diffusion film and preparation method and application thereof

A technology of optical diffusion and light diffusion particles, which is applied in the field of optical films, can solve problems such as unsatisfactory effects, poor display quality of mobile phone screens, and improved uniformity of light diffusion in backlight modules to achieve haze and light transmittance. Good stability, protection of the light guide plate, and moderate light transmittance

Active Publication Date: 2021-09-17
江西古川胶带有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the light diffusion effect of the existing diffusion film is not ideal, which may cause poor light display quality of the mobile phone screen, and as the resolution requirements of the screens of mobile phone electronic products are getting higher and higher, the light diffusion of the backlight module is uniform. Degree requirements have also increased

Method used

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  • Optical diffusion film and preparation method and application thereof
  • Optical diffusion film and preparation method and application thereof
  • Optical diffusion film and preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example 1

[0086] A mother liquor comprises the following components in parts by weight:

[0087]

[0088] The preparation method of the mother liquor that this preparation example provides specifically comprises the steps:

[0089] (1) the first light diffusion particle (particle diameter is 3 μm, material is PMMA cross-linked body, the second light diffusion particle (particle diameter is 8 μm, material is PMMA micropowder) and titanium dioxide are dissolved in butanone and n-propyl ester, Disperse at a rotational speed of 500 rpm to obtain the first mixture;

[0090] (2) Mix the first mixture obtained in step (1) with the first acrylic resin (Suzhou Litianrun, LK-331), and disperse for 30 minutes at a rotating speed of 1000 rpm to obtain the second mixture;

[0091] (3) Mix the second mixture obtained in step (2), dispersant (BYK-111), leveling agent (BYK-54) and defoamer (BYK-057), and disperse at 2000 rpm for 60 minutes to obtain the first three mixtures;

[0092] (4) Mix the ...

preparation example 2

[0094] A mother liquor comprises the following components in parts by weight:

[0095]

[0096] The preparation method of the mother liquor that this preparation example provides specifically comprises the steps:

[0097] (1) Dissolve the third light-diffusing particles (particle size is 8 μm, material is PMMA cross-linked) in methyl ethyl ketone and n-propyl ester, and disperse at 500 rpm to obtain the first mixture;

[0098] (2) Mix the first mixture obtained in step (1) with the second acrylic resin (Suzhou Litianrun, LK-332), and disperse for 30 minutes at a rotating speed of 1000 rpm to obtain the second mixture;

[0099] (3) Mix the second mixture obtained in step (2), dispersant (BYK-111), leveling agent (BYK-54) and defoamer (BYK-057), and disperse at 2000 rpm for 60 minutes to obtain the first three mixtures;

[0100] (4) Mix the third mixture obtained in step (3) with a curing agent (N3300), and disperse for 20 minutes at a rotational speed of 5000 rpm to obtain...

Embodiment 1

[0127] A kind of optical diffusion film, its cross-sectional structure is as figure 1 As shown, it includes: a protective film 4, a first optical diffusion layer 1, a base layer 2 and a second optical diffusion layer 3;

[0128] Wherein, the thickness of the first optical diffusion layer and the second optical layer is 10 μm, and the thickness of the base layer is 50 μm;

[0129] The preparation method of the optical diffusion film provided in this embodiment comprises the following steps:

[0130] (1) Coating the preparation raw materials of the first optical diffusion layer (preparation example 1) and the preparation raw materials of the second optical diffusion layer (preparation example 2) on both sides of the base layer (PET film) respectively to obtain a diffusion film;

[0131] (2) Attaching a protective film (PET film) to the surface of the first optical diffusion layer of the diffusion film obtained in step (1) to obtain the optical diffusion film.

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Abstract

The invention provides an optical diffusion film and a preparation method and application thereof. The optical diffusion film comprises a first optical diffusion layer, a base layer and a second optical diffusion layer which are sequentially arranged; the material of the first optical diffusion layer comprises a combination of first light diffusion particles, second light diffusion particles, titanium dioxide and first acrylic resin; the material of the second optical diffusion layer comprises a combination of third optical diffusion particles and second acrylic resin; the particle size of the second light diffusion particles is larger than that of the first light diffusion particles; the two light diffusion particles with different particle sizes are added to the first optical diffusion layer and matched with the titanium dioxide so that the optical diffusion film has the advantages of high haze, moderate light transmittance and good haze and light transmittance stability.

Description

technical field [0001] The invention belongs to the technical field of optical films, and in particular relates to an optical diffusion film and its preparation method and application. Background technique [0002] Optical diffusion film is a film with light diffusion function that can convert point light source and line light source into line light source and surface light source, and can change strong light into soft light. It is widely used in the field of liquid crystal display. Optical diffusion film is used as a backlight module An important part of the group, its main function is to increase the brightness of the light. Its function is to use light to pass through media with different refractive indices, and the light will produce many refraction, reflection and scattering phenomena, which can improve the viewing angle and increase the softness of the light source. It achieves the effect of optical diffusion and also has the function of protecting the prism sheet. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/02C08J7/04
CPCG02B5/0278G02B5/0242G02B5/0268C08J7/04C08J2367/02C08J2433/04
Inventor 彭雯霏
Owner 江西古川胶带有限公司
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