TWM524485U - Reflective film and backlight module - Google Patents

Description

Reflective film and backlight module

The present invention relates to a reflective film, and more particularly to a polypropylene reflective film having a roughened structure integrally formed on a surface thereof and a backlight module using the reflective film.

Referring to FIG. 1 and FIG. 2 , the conventional backlight module 1 includes a light source 10 and a diffusion film 11 , a light guide plate 12 and a reflective film 13 which are sequentially stacked. The arrangement of the reflective film 13 can reduce light leakage to increase the light energy usage of the light source 10. In order to further prevent adsorption with the light guide plate and obtain a uniform surface light source, a plurality of scattering particles 131 are generally coated on the surface of the reflective film 13 to scatter the light of the light source 10.

However, the use of such scattering particles 131 requires additional material costs, and it is often difficult to stably maintain the quality and yield of the processing.

Therefore, the object of the present invention is to provide a reflective film which can prevent adsorption with a light guide plate and obtain a uniform surface light source without additional material cost.

Thus, the novel reflective film comprises a monolithic polymer film body comprising two opposite surfaces, at least one of which is integrally formed with a roughened structure having a ten point average roughness ranging from 10 to 50 μm measured according to JIS B 0031, The light is scattered, and the material of the monolithic polymer film body is mainly polypropylene.

Therefore, another object of the present invention is to provide a backlight module including a light source and a sequentially stacked diffusion film, a light guide plate and a reflective film as described above, the light guide plate having a light incident surface, the light source Adjacent to the light incident surface of the light guide plate, and the light emitted by the light source is scattered to the diffusion film by the roughened structure of the reflective film.

The effect of the novel is that the reflective film utilizes an integrally formed roughened structure and is applied to the backlight module to prevent adsorption with the light guide plate and obtain a uniform surface light source, without additional material cost and easy to maintain the quality of the processing and good. rate.

The following is a detailed description of this new content:

Preferably, the monolithic polymer film body has a thickness ranging from 100 to 500 μm.

Preferably, the roughened structure is formed by roller embossing.

Preferably, the roughened structure is non-particulate.

Preferably, the roughened structure has a continuous and repeating texture.

Preferably, the monolithic polymeric film body is opaque white.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

The present invention will be further described in the following examples, but it should be understood that this embodiment is intended to be illustrative only and not to be construed as limiting.

Referring to Figure 3, one embodiment of the novel reflective film 2 comprises a monolithic polymeric film body 20 having a thickness in the range of from 100 to 500 μm. The monolithic polymeric film body 20 is primarily of polypropylene and includes two opposing surfaces 21, 22. The surface 21 is integrally formed with a roughened structure 211 having a ten-point average roughness ranging from 10 to 50 μm measured in accordance with JIS B 0031.

In the present embodiment, the monolithic polymer film body 20 has a thickness of about 300 μm. The roughened structure 211 has a ten point average roughness of about 30 μm measured according to JIS B 0031 to scatter light.

The novel reflective film 2 may also comprise a support layer or a coating layer which is commonly used in the art.

Referring to Fig. 4, the embodiment can be obtained by a method comprising the steps of feeding a polypropylene-based raw material to an extruder, extruding it by hot melt, and passing a texture roller having a surface roughness of 30 μm. Printing, and finally cooling the sheet to obtain the monolithic polymer film body 20 of the embodiment in which the roughened structure 211 is integrally formed. The monolithic polymeric film body 20 is opaque white. The roughened structure 211 is non-granular and has a continuous and repeating texture.

Referring to FIG. 5 , an embodiment of the backlight module 3 includes a light source 30 , a diffusion film 31 , a light guide plate 32 , and a reflective film 2 of the above embodiment. The light guide plate 32 has a light incident surface 321 . The light source 30 is adjacent to the light incident surface 321 of the light guide plate 32, and the light emitted by the light source 30 is reflected by the roughened structure 211 of the reflective film 2, and is scattered to a uniform surface light source to be irradiated to the diffusion film 31.

In summary, the novel reflective film 2 is integrally formed with a roughened structure 211 having a roughness ranging from 10 to 50 μm, and is applied to the backlight module to prevent adsorption with the light guide plate, and is reflected to emit the light source 30. The light is scattered into a uniform surface light source, which does not require additional material cost and is easy to maintain the quality and yield of the processing, so that the purpose of the present invention can be achieved.

However, the above is only the embodiment of the present invention, and when it is not possible to limit the scope of the present invention, all the simple equivalent changes and modifications according to the scope of the patent application and the contents of the patent specification are still This new patent covers the scope.

1‧‧‧Backlight module
10‧‧‧Light source
11‧‧‧Diffuser film
12‧‧‧Light guide plate
13‧‧‧Reflective film
131‧‧‧scattering particles
2‧‧‧Reflective film
20‧‧‧One piece polymer film body
21‧‧‧ surface
211‧‧‧Roughened structure
22‧‧‧ Surface
3‧‧‧Backlight module
30‧‧‧Light source
31‧‧‧Diffuser film
32‧‧‧Light guide plate
321‧‧‧Into the glossy
9‧‧‧Texture Roller

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: FIG. 1 is a perspective exploded view illustrating a conventional backlight module; [FIG. 2] is a cross-sectional view Referring to the schematic view, a conventional reflective film is illustrated; [Fig. 3] is a schematic cross-sectional view showing an embodiment of the novel reflective film; [Fig. 4] is a schematic view showing a monolithic polymer of the embodiment. The process of the film body; and [Fig. 5] is a perspective exploded view illustrating an embodiment of the backlight module of the present invention.

2‧‧‧Reflective film

20‧‧‧One piece polymer film body

21‧‧‧ surface

211‧‧‧Roughened structure

22‧‧‧ Surface

Claims (7)

A reflective film comprising a monolithic polymer film body comprising two opposite surfaces, wherein at least one surface is integrally formed with a roughened structure having a ten point average roughness ranging from 10 to 50 μm measured according to JIS B 0031 for scattering light And the material of the monolithic polymer film body is mainly polypropylene. The reflective film of claim 1, wherein the monolithic polymer film body has a thickness ranging from 100 to 500 μm. The reflective film of claim 1, wherein the roughened structure is formed by roller embossing. The reflective film of claim 1, wherein the roughened structure is non-particulate. The reflective film of claim 1, wherein the roughened structure has a continuous and repeating texture. The reflective film of claim 1, wherein the monolithic polymer film body is opaque white. A backlight module comprising a light source and a diffusion film arranged in sequence, a light guide plate and the reflective film according to claim 1, wherein the light guide plate has a light incident surface, and the light source is adjacent to the light incident surface of the light guide plate. And the light emitted by the light source is scattered to the diffusion film by the roughened structure of the reflective film.