A kind of composite brightening film and preparation method thereof

A technology of brightness-enhancing film and polyurethane layer, which is applied in the direction of prisms, etc., can solve the problems of overall thickness, easy to produce light shadows, and insufficient brightness of small-sized displays.

Active Publication Date: 2017-10-20
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 of small-sized displays, the invention provides a composite brightness-enhancing film and its preparation method

Method used

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  • A kind of composite brightening film and preparation method thereof
  • A kind of composite brightening film and preparation method thereof
  • A kind of composite brightening film and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] In the composite brightening film provided by the present invention, 100 parts of polyurethane coating solution, 0.03 parts of polydimethylsiloxane leveling agent BYK-410, 0.03 parts of defoamer BYK-024, and 200 parts of pure water 30 parts of solvent-based UV curing resin glue, 30 parts of solvent, 0.4 parts of PMMA particles, 0.165 parts of dispersant, Mix evenly with a stirrer and apply it on the lower surface of the PET film with the polyurethane layer, dry it in an oven at 80°C for 1min, and then use a high-pressure mercury lamp at 400mj / cm 2 The total energy of the film is irradiated to make it UV hardened to obtain a film with a particle layer; then the solvent-free UV-curable glue is coated on the upper surface of the PET with a polyurethane coating, and it is extruded by a special engraved roller , and at 450mj / cm 2 Irradiated by a high-pressure mercury lamp to make it solidify and form, and finally obtain a composite brightness-enhancing film.

[0066] The b...

Embodiment 2

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

[0070] The b...

Embodiment 3

[0073] In the composite brightening film provided by the present invention, 100 parts of polyurethane coating solution, 0.03 parts of polydimethylsiloxane leveling agent BYK-410, 0.06 parts of defoamer BYK-024, and 200 parts of pure water 30 parts of solvent-based UV curing resin glue, 30 parts of solvent, 0.1 part of PMMA particles, 0.165 parts of dispersant, Mix evenly with a stirrer and apply it on the lower surface of the PET film with the polyurethane layer, dry it in an oven at 80°C for 1min, and then use a high-pressure mercury lamp at 400mj / cm 2 The total energy of the film is irradiated to make it UV hardened to obtain a film with a particle layer; then the solvent-free UV-curable glue is coated on the upper surface of the PET with a polyurethane coating, and it is extruded by a special engraved roller , and at 450mj / cm 2 Irradiated by a high-pressure mercury lamp to make it solidify and form, and finally obtain a composite brightness-enhancing film.

[0074] The br...

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Abstract

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. In order to solve the disadvantages of insufficient brightness, overall thickness, and easy lamp shadows of small-sized displays, the invention provides a composite brightness-enhancing film and a preparation method thereof. The composite brightness enhancement film sequentially includes a brightness enhancement structure layer, a first polyurethane layer, a PET layer, a second polyurethane layer, and a particle layer; the first polyurethane layer and the second polyurethane layer are collectively referred to as a polyurethane layer. The composite brightness-enhancing film has high light transmittance, shielding and luminance performance. After being applied to the backlight module, it can effectively solve the defects of serious energy consumption, insufficient brightness, and lamp shadows of the display, and make the brightness-enhancing film The back has a good anti-adhesion effect, effectively reducing the thickness of the backlight module.

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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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/04B32B27/36
Inventor 金亚东王陈
Owner NINGBO CHANGYANG TECH
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