Diffusion type reflection film and preparation method thereof

A reflective film and diffusion technology, which is applied in the field of diffuse reflective film and its preparation, can solve the problems of easily producing LED lamp shadows and affecting the picture quality of liquid crystal displays, etc., and achieve the effect of large size, low cost and increased diffusion effect

Active Publication Date: 2017-05-17
NINGBO CHANGYANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that LED light shadows are easily generated in the existing backlight module and affect

Method used

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  • Diffusion type reflection film and preparation method thereof
  • Diffusion type reflection film and preparation method thereof
  • Diffusion type reflection film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0065] In the diffuse reflection film provided by the present invention, the ratio of layer A is 97.5% of PET slices, 2% of silicon dioxide particles, and 0.5% of nanoscale indium tin oxide. The ratio of layer B is 65% PET chips, 10% rutile titanium dioxide, 20% polymethylpentene, and 5% benzotriazole ultraviolet absorber. The diffusion glue coating is composed of the following components: 55% mixed solvent (butanone: ethyl acetate = 1:1), 35% acrylate adhesive, 7% aliphatic polyisocyanate, 3% particle size of 25- For 30 μm polybutylmethacrylate diffusion particles, the stated percentages are percentages by mass. The thickness of layer A accounts for 6% of the total thickness, the thickness of layer B accounts for 88% of the total thickness, and the thickness of the diffusion coating is 25 μm. The obtained reflective film substrate has a thickness of 300 μm, and the relevant properties are shown in Table 2.

Embodiment 2

[0067] In the diffuse reflection film provided by the invention, the ratio of layer A is 94% of PET chips, 4% of silicon dioxide particles, and 2% of ethoxylated aliphatic alkylamines. The ratio of layer B is 74% PET chips, 8% BaSO 4 , 15% cyclic olefin copolymer resin, 3% benzotriazole UV absorber. The diffusion glue coating is composed of the following components: 60% solvent (toluene: methyl ethyl ketone = 1: 1), 30% polyurethane adhesive, 5% aliphatic polyisocyanate, 5% polyformaldehyde with a particle size of 27-33 μm Diffusion particles of methyl acrylate, the percentage content is mass percentage content. The thickness of layer A accounts for 6% of the total thickness, the thickness of layer B accounts for 88% of the total thickness, and the thickness of the diffusion coating is 25 μm. The obtained reflective film substrate has a thickness of 300 μm, and the relevant properties are shown in Table 2.

Embodiment 3

[0069] In the diffusion reflective film provided by the invention, the ratio of layer A is 92% PET chips, 6% silicon dioxide particles, and 2% ethoxylated aliphatic alkylamines. The proportion of layer B is 70% PET chips, 10% CaCO 3 , 15% polymethylpentene, 5% benzotriazole UV absorber. The diffusion glue coating is composed of the following components: 55% solvent (toluene:ethyl acetate=1:1), 35% epoxy resin adhesive, 7% aliphatic polyisocyanate, 3% particle size of 25-30 μm The polybutyl methacrylate diffusion particles, the percentage content is mass percentage content. The thickness of layer A accounts for 6% of the total thickness, the thickness of layer B accounts for 88% of the total thickness, and the thickness of the diffusion coating is 25 μm. The obtained reflective film substrate has a thickness of 300 μm, and the relevant properties are shown in Table 2.

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Abstract

The invention relates to a diffusion type reflection film and a preparation method thereof in order to solve a problem that LED lamp shadows are easily generated in a current backlight module. The reflection film comprises a reflection film base material with a structure of A, B, A layers. A diffusion coating containing particles with large particle sizes is coated on one face of the reflection film base material. During a preparation process, raw materials of the diffusion coating are prepared into diffusion glue paint which is formed by following components of, by mass, 45-66% of mixed solvent, 30-40 % of adhesive, 3-10% of polyisocyanate cross-linking agent, and 1-5% of diffusion particles with large particle sizes, wherein the particle size of each diffusion particle is 25-50[mu]m. According to the invention, when the reflection film is applied to a liquid crystal display backlight module, generation of the LED lamp shadows is avoided and a problem of uneven brightness is solved.

Description

technical field [0001] The invention relates to a reflective film used in a liquid crystal backlight source, in particular to a diffused reflective film and a preparation method thereof. Background technique [0002] The backlight module is one of the key components of the liquid crystal display panel (LCD panel). Since the liquid crystal itself does not emit light, the function of the backlight module is to supply sufficient brightness and evenly distributed light source so that it can display images normally. LCD panels are now widely used in electronic products with great development potential such as monitors, notebook computers, tablet computers, digital cameras and projectors, thus driving the demand for key components in backlight modules. [0003] The backlight module is mainly composed of light source (including CCFL, hot cathode fluorescent tube, LED, etc.), reflective film, light guide plate, diffusion film, brightness enhancement film and frame and other componen...

Claims

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Application Information

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IPC IPC(8): G02B5/08G02F1/1335
CPCG02B5/0841G02F1/133605
Inventor 金亚东张克然张园园
Owner NINGBO CHANGYANG TECH
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