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Diffuse-reflection brightness enhancement film and preparation method thereof

A technology of diffuse reflection and brightness enhancement film, applied in optics, instruments, optical components, etc., can solve the problems that the brightness enhancement film cannot be achieved, unfavorable to simplify production, adverse environmental effects, etc., to increase the light mixing effect, avoid light and shadow, increase The effect of the brightening effect

Active Publication Date: 2014-05-28
NINGBO DXC NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In view of the disadvantages of complex process procedures and low production efficiency, it is not conducive to simplifying production, and it will cause certain adverse effects on the environment.
In the actual use process, users will require that the functions of the diffusion film and the brightness enhancement film be combined into one, and at the same time meet the purpose of diffusion and brightness enhancement. The existing brightness enhancement film cannot achieve this effect.

Method used

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  • Diffuse-reflection brightness enhancement film and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0021] refer to figure 1 , a kind of diffuse reflective incremental film, comprising a PET base film 1, a layer of PETG layer 2 is also compounded on the PET base film 1, the surface of the PETG layer 2 has several rows of arc-shaped protrusions parallel to each other, Adjacent arc-shaped protrusions are connected to each other, and each row of arc-shaped protrusions has bumps 3 . The protruding point described in this embodiment is a triangular pyramid-shaped protruding point, of course, the protruding point can also be in other shapes, and the triangular pyramid-shaped protruding point has the best light mixing effect.

[0022] The preparation method of the above-mentioned diffuse reflection brightness enhancement film first prepares a molded base film, and the preparation of the molded base film includes the following steps:

[0023] A. Feed the PETG raw material into the extruder, melt and extrude, and set the temperature of the extruder at 150°C;

[0024] B. Feed the PE...

Embodiment 2

[0031] refer to figure 1 , a kind of diffuse reflective incremental film, comprising a PET base film 1, a layer of PETG layer 2 is also compounded on the PET base film 1, the surface of the PETG layer 2 has several rows of arc-shaped protrusions parallel to each other, Adjacent arc-shaped protrusions are connected to each other, and each row of arc-shaped protrusions has bumps 3 . The protruding point described in this embodiment is a triangular pyramid-shaped protruding point, of course, the protruding point can also be in other shapes, and the triangular pyramid-shaped protruding point has the best light mixing effect.

[0032] The preparation method of the above-mentioned diffuse reflection brightness enhancement film first prepares a molded base film, and the preparation of the molded base film includes the following steps:

[0033] A. Feed the PETG raw material into the extruder, melt and extrude, and set the temperature of the extruder at 160°C;

[0034] B. Feed the PE...

Embodiment 3

[0045] refer to figure 1 , a kind of diffuse reflective incremental film, comprising a PET base film 1, a layer of PETG layer 2 is also compounded on the PET base film 1, the surface of the PETG layer 2 has several rows of arc-shaped protrusions parallel to each other, Adjacent arc-shaped protrusions are connected to each other, and each row of arc-shaped protrusions has bumps 3 . The protruding point described in this embodiment is a triangular pyramid-shaped protruding point, of course, the protruding point can also be in other shapes, and the triangular pyramid-shaped protruding point has the best light mixing effect.

[0046] The preparation method of the above-mentioned diffuse reflection brightness enhancement film first prepares a molded base film, and the preparation of the molded base film includes the following steps:

[0047] A. Feed the PETG raw material into the extruder, melt and extrude, and set the temperature of the extruder at 170°C;

[0048] B. Feed the PE...

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Abstract

A diffuse-reflection brightness enhancement film comprises a PET (polyethylene terephthalate) base film, wherein a PETG (polyethylene terephthalate glycol) layer is composited on the PET base film, a plurality of rows of arc-shaped bulges are arranged on the surface of the PETG layer, and bulge points are arranged on each row of arc-shaped bulges. A preparation method of the diffuse-reflection brightness enhancement film comprises the steps as follows: firstly, a mold pressing base film is prepared, wherein preparation of the mold pressing base film comprises the steps as follows: A, a PETG raw material is fed into an extruder and extruded in a melted manner; B, a PET raw material is fed into the other extruder and extruded in a melted manner; C, the PETG raw material and the PET raw material are melted and then pass through a co-extrusion mold head, and a casting piece is formed on a quenching roller; D, the casting piece is stretched longitudinally after being preheated; E, the piece stretched longitudinally is preheated again and then stretched transversely; and F, the mold pressing base film is obtained after thermoforming and cooling of the piece stretched transversely; and the mold pressing base film is mounted into a mold press for mold pressing after being obtained. Co-extrusion and mold pressing methods are adopted, so that the production speed is increased greatly, various defects in a coating process are avoided, and the yield is increased.

Description

technical field [0001] The invention relates to a brightness enhancing film. Background technique [0002] Liquid Crystal Display (LCD, Liquid Crystal Display) has become the most common display technology today. Because LCD has the advantages of environmental protection, low energy consumption, low radiation, soft picture, etc., LCD will be the mainstream display technology in the next few decades. The LCD is a non-luminescent display device, which requires the backlight module to achieve the display function, so the performance of the backlight module will directly affect the image quality of the LCD. The main components of the backlight module include: light source, light guide plate, and various optical films. The optical film in the backlight system mainly includes three types: reflective film, diffusion film and brightness enhancement film. The main function of the reflective film is to increase the reflectivity of the optical surface. The main function of the diff...

Claims

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Application Information

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IPC IPC(8): B29C69/00B29C47/00B29C55/14B29C59/04G02B5/128
Inventor 罗培栋靳钊
Owner NINGBO DXC NEW MATERIAL TECH
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