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Multifunctional brightness enhancement film, preparation method thereof and backlight module

A brightening film, multi-functional technology, applied in optics, optical components, instruments, etc., can solve the problem of backlight module brightness decline and other problems

Pending Publication Date: 2021-02-02
DONGGUAN GUANGZHI PHOTOELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the current general atomization structure is a uniform and non-directional diffusion surface. This structure only provides a basic diffusion atomization effect for concealing blemishes and improving taste, but this effect will reduce the brightness of the backlight module.

Method used

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  • Multifunctional brightness enhancement film, preparation method thereof and backlight module
  • Multifunctional brightness enhancement film, preparation method thereof and backlight module
  • Multifunctional brightness enhancement film, preparation method thereof and backlight module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Select the tool and engraving parameters, engrave the semi-ellipsoidal pit microstructure with a major axis of 30 μm, a short axis of 20 μm, and a height of 5 μm over the entire roller, and then use UV coating to engrave the semi-ellipsoidal pit microstructure Transfer to one of the surfaces of the PET film, and at the same time apply a prism structure layer with a height of 25 μm and an apex angle of 90°;

[0074] The included angle between the long axis of the semi-ellipsoid bumps on the surface of the obtained multifunctional brightness enhancement film and the LED light bar is 90°.

[0075] The multifunctional brightness enhancement film obtained in Example 1 is tested for performance, specifically:

[0076] Among them, the haze and light transmittance are tested by Nippon Denshoku NDH 7000 II instrument;

[0077] The brightness is tested by CCD brightness and chromaticity analyzer CF-600;

[0078] Opacity is observed with the naked eye.

[0079] The results show...

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Abstract

The invention provides a multifunctional brightness enhancement film. The multifunctional brightness enhancement film comprises a prism layer, a PET base film and a microstructure layer which are in contact in sequence, wherein the microstructure layer is composed of a plurality of ellipsoidal convex points compounded on the surface of the PET base film; the long axis of each ellipsoidal convex point is 5-80 microns; the short axis of each ellipsoidal convex point is 4-60 microns; and the included angle between the long axis of each ellipsoidal convex point and the LED light bar ranges from 0degree to 90 degrees. A diffusion structure (microstructure layer) with directivity is coated on the surface of the optical film by utilizing the characteristic, the optical characteristic is controlled by utilizing the structure and the direction of a light source, a better condensation effect and a better atomization effect are achieved, and the size of the diffusion microstructure is far smaller than the size (generally 200 microns) which can be distinguished by human eyes. Therefore, no matter what the arrangement mode of the structure is, the diffusion effects felt by human eyes are the same. The invention further provides a preparation method of the brightness enhancement film and a backlight module.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal display backlight modules, and in particular relates to a multifunctional light-increasing film, a preparation method thereof and a backlight module. Background technique [0002] LCD product is a kind of non-active light-emitting electronic device, which does not have light-emitting characteristics. It must rely on the emission of the light source in the backlight module to obtain display performance. Therefore, the brightness of LCD is determined by its backlight module. It can be seen that the quality of the backlight determines important parameters such as the brightness of the LCD screen, the uniformity of emitted light, and the color scale, and largely determines the luminous effect of the LCD screen. [0003] The backlight module includes a lighting source, a reflector, a light guide plate, a diffuser, a brightness enhancement film (prism sheet), and a frame. The backlight modules u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/02
CPCG02B5/0231G02B5/0268
Inventor 罗惠滨
Owner DONGGUAN GUANGZHI PHOTOELECTRIC CO LTD
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