Composite brightness enhancement film and preparation method thereof

A brightening film and polyurethane layer technology, applied in chemical instruments and methods, synthetic resin layered products, layered products, etc., can solve the problems of insufficient brightness of small-sized displays, easy lamp shadows, and overall thickness

Active Publication Date: 2015-11-25
NINGBO CHANGYANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the shortcomings of insufficient brightness, overall thickness, and easy lamp shadows

Method used

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  • Composite brightness enhancement film and preparation method thereof
  • Composite brightness enhancement film and preparation method thereof
  • Composite brightness enhancement film and preparation method thereof

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0064] Example 1

[0065] The composite brightness-enhancing film provided by the present invention comprises 100 parts of polyurethane coating liquid, 0.03 part of polydimethylsiloxane type leveling agent BYK-410, 0.03 part of defoamer BYK-024, 200 parts of pure water 30 parts of solvent-based UV-curable resin glue, 30 parts of solvent, 0.4 parts of PMMA particles, 0.165 parts of dispersant, After mixing evenly with a stirrer, apply it to the lower surface of the PET film with the existing polyurethane layer, place it in an oven at 80°C for 1 min, and then use a high-pressure mercury lamp at 400mj / cm 2 The total energy of the above-mentioned film is irradiated to make it UV-hardened to obtain a film with a particle layer; then the solvent-free UV-curing glue is applied to the upper surface of the PET with a polyurethane coating, and it is extruded through a special engraving roller. , and at 450mj / cm 2 The high-pressure mercury lamp is irradiated to make it solidify and for...

Example Embodiment

[0068] Example 2

[0069] The composite brightness-enhancing film provided by the present invention comprises 100 parts of polyurethane coating solution, 0.03 part of polydimethylsiloxane type leveling agent BYK-410, 0.06 part of defoamer BYK-024, 200 parts of pure water 30 parts of solvent-based UV-curable resin glue, 30 parts of solvent, 0.4 parts of PMMA particles, 0.165 parts of dispersant, After mixing evenly with a stirrer, apply it to the lower surface of the PET film with the existing polyurethane layer, place it in an oven at 80°C for 1 min, and then use a high-pressure mercury lamp at 400mj / cm 2 The total energy of the above-mentioned film is irradiated to make it UV-hardened to obtain a film with a particle layer; then the solvent-free UV-curing glue is applied to the upper surface of the PET with a polyurethane coating, and it is extruded through a special engraving roller. , and at 450mj / cm 2 The high-pressure mercury lamp is irradiated to make it solidify and f...

Example Embodiment

[0072] Example 3

[0073] The composite brightness-enhancing film provided by the present invention comprises 100 parts of polyurethane coating solution, 0.03 part of polydimethylsiloxane type leveling agent BYK-410, 0.06 part of defoamer BYK-024, 200 parts of pure water After mixing evenly with a stirrer, apply it to the PET base film, and place it in an oven at 150 °C for heating and drying for 3 minutes; then take 30 parts of solvent-based UV-curable resin glue, 30 parts of solvent, 0.1 part of PMMA particles, and 0.165 parts of dispersant, After mixing evenly with a stirrer, apply it to the lower surface of the PET film with the existing polyurethane layer, place it in an oven at 80°C for 1 min, and then use a high-pressure mercury lamp at 400mj / cm 2 The total energy of the above-mentioned film is irradiated to make it UV-hardened to obtain a film with a particle layer; then the solvent-free UV-curing glue is applied to the upper surface of the PET with a polyurethane coat...

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Abstract

The invention relates to a composite brightness enhancement film used by a backlight source in a liquid crystal display, and particularly relates to a composite brightness enhancement film. The invention provides a composite brightness enhancement film and a preparation method thereof in order to solve defects that a small-size display is insufficient in brightness and relatively thick as a whole and that lamp shadow occurs easily. The composite brightness enhancement film sequentially comprises a brightness enhancement structural layer, a first polyurethane layer, a PET layer, a second polyurethane layer and a particle layer, wherein the first polyurethane layer and the second polyurethane layer are collectively referred as a polyurethane layer. The composite brightness enhancement film has high light transmittance, shielding performance and brightness performance, and can effectively solve the defect that the display is serious in energy consumption and insufficient in brightness and has lamp shadow after being applied to a backlight module. In addition, the reverse side of the brightness enhancement film is enabled to have a good adhesion preventing effect, and the thickness of the backlight module is effectively reduced.

Description

technical field [0001] The invention relates to a brightness-enhancing film used in a backlight source in a liquid crystal display, in particular to a composite brightness-enhancing film with UV curing back coating. Background technique [0002] Brightness enhancement film is one of the most important optical films widely used in the backlight module of liquid crystal display. Light loss, to achieve the purpose of increasing the brightness of the backlight or reducing power consumption. Its brightening principle is to use its special prism structure. When the light scattered by the diffuser reaches the surface of the prism, the light with a critical angle smaller than the BEF material is emitted through the prism surface, and the light with a critical angle greater than the BEF material is reflected back through the prism surface. Diffuser, about 50% of the light is recycled again. In this way, the outgoing light is concentrated in the range of + / -35° (with the normal dire...

Claims

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Application Information

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IPC IPC(8): G02B5/04B32B27/36
Inventor 金亚东王陈
Owner NINGBO CHANGYANG TECH
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