CN102565914B - Light conductor and manufacture method thereof - Google Patents

Abstract

The invention provides a kind of core manufacturing process, it comprises the steps: the first colloid layer of the printing opacity that formation one is uncured; The concaveconvex structure of diffusion light is formed in the surface of this first colloid layer; Solidify the first colloid layer that this has concaveconvex structure; The second colloid layer of the printing opacity that coating one is uncured on this concaveconvex structure; Solidify this second colloid layer; The 3rd colloid layer of a uncured printing opacity is applied in the surface of this second colloid layer; Multiple prism deviating from the optically focused of this second colloid layer is formed in the surface of the 3rd colloid layer; And solidify the 3rd colloid layer that this has prism.The light conductor obtained by this core manufacturing process is structure as a whole.

Description

Light guide and manufacturing method thereof

technical field

The present invention relates to a light guide and its manufacturing method.

Background technique

Light guides are widely used in backlight modules for guiding light. Usually, a light guide has only one function, such as light concentrating or uniform light, etc., and it can be in the shape of a plate, a sheet, or a film. The light guiding body with various functions can be combined to achieve the desired light guiding effect.

However, the simple combination of light guides with various functions often results in larger volume, heavier weight, loss of light transmission, and more cost.

Contents of the invention

In view of this, it is necessary to provide a light guide and a manufacturing method thereof that can overcome the above disadvantages.

A method of manufacturing a light guide, comprising the steps of:

forming an uncured light-transmitting first colloidal layer;

forming a light-diffusing concave-convex structure on the surface of the first colloidal layer, and the concave-convex structure is formed by mold transfer;

curing the first colloidal layer with a concave-convex structure;

Coating an uncured light-transmitting second colloid layer on the concave-convex structure, the first colloid layer and the second colloid layer are made of the same material, and the second colloid layer does not completely fill the recesses of the concave-convex structure ;

curing the second colloidal layer;

Coating an uncured light-transmitting third colloidal layer on the surface of the second colloidal layer;

forming a plurality of light-condensing prisms away from the second colloid layer on the surface of the third colloid layer; and

The third colloidal layer with prisms is cured.

A light guide body, which includes a first colloidal layer, a second colloidal layer and a third colloidal layer which are light-transmissive and sequentially stacked and respectively cured to form an integrated structure. The interface where the first colloid layer connects to the second colloid layer forms a plurality of concave-convex structures that diffuse light, and the third colloid layer forms a plurality of light-condensing prisms away from the second colloid layer. The first colloid layer and the second colloid layer are made of the same material. The second colloid layer does not completely fill the recesses of the concave-convex structure.

Compared with the prior art, the light guide provided by the present invention adopts the method of sequentially stacking and curing separately to form an integrated structure, so that the three colloidal layers form an integrated structure with both light concentrating and light diffusing functions. The integrated structure reduces the weight and cost of the light guide body, and the light can directly propagate in the light guide body, thereby reducing light loss.

Description of drawings

FIG. 1 is a schematic diagram of a light guide provided by an embodiment of the present invention, wherein the light guide includes upper and lower protective films that can be torn off.

Explanation of main component symbols

Light guide 100

The first gel layer 20

Concave-convex structure 22

Second gel layer 30

The third colloidal layer 40

Prism 42

Lower protective film 10

Upper protective film 50

detailed description

The touch panel provided by the technical solution will be further described in detail below with reference to the drawings and multiple embodiments.

Referring to FIG. 1 , the light guide 100 provided by the embodiment of the present invention mainly includes a first colloidal layer 20 , a second colloidal layer 30 and a third colloidal layer 40 stacked in sequence. The first colloidal layer 20 , the second colloidal layer 30 and the third colloidal layer 40 are respectively cured in sequence to form an integrated structure.

The first colloidal layer 20 and the second colloidal layer 30 are selected from one of epoxy resin, polymethyl methacrylate (PMMA) and silica gel. The interface between the first colloidal layer 20 and the second colloidal layer 30 has a plurality of light-diffusing concave-convex structures 22 . The first colloidal layer 20 and the second colloidal layer 30 are formed in layers and cured successively to form the interface. The concave-convex structure 22 can be formed by mold transfer method or particle doping method (see the following method examples). Especially, when the first colloidal layer 20 and the second colloidal layer 30 are made of the same material, and the concave-convex structure 22 is formed by the mold transfer method, the depth dimension of the concave-convex structure 22 is preferably larger, so that in the second colloidal layer 30 is coated on the concave-convex structure 22, the depression of the concave-convex structure 22 is not completely filled with the material of the second colloid layer 30, so it can finally form between the first colloid layer 20 and the second colloid layer 30 Porous concave-convex structure. It can be understood that when the interface connecting the first colloid layer 20 and the second colloid layer 30 is made of different materials, the concave-convex structure interface will not disappear due to the coverage of the second colloid layer 30 if it finally exists.

The material of the third colloid layer 40 is UV glue. The third colloidal layer 40 is formed with a plurality of light-condensing prisms 42 facing away from the second colloidal layer 30 .

The light guide body 100 may further include a lower protective film 10 and an upper protective film 50 with release properties. The lower protective film 10 is attached to the bottom surface of the first colloidal layer 20 facing away from the second colloidal layer 30 , and the upper protective film 50 covers the prisms 42 of the third colloidal layer 40 . The surfaces of the lower protective film 10 and the upper protective film 50 are both plane. The lower protective film 10 and the upper protective film 50 can protect the structure of the colloid layer from being polluted or damaged. When the light guide 100 is used, the lower protective film 10 and the upper protective film 50 can be torn off. Due to the release property, the lower protective film 10 and the upper protective film 50 will not damage the colloidal layers. The lower protective film 10 and the upper protective film 50 can be made of materials different from those of the colloid layers, and can be flexible. The lower protective film 10 and the upper protective film 50 can be reused.

The light guide body 100 can be used in a backlight module, and it has two functions of concentrating light and diffusing light. The light can first be converged by the prism 42 and then diffused uniformly by the concave-convex structure 22 . The integrated structure of the light guide body reduces the weight and cost of the light guide body, and the light can directly propagate in the light guide body, thereby reducing light loss.

The light guide body 100 can be manufactured according to the following method. Firstly, an uncured first transparent colloidal layer 20 is formed. Next, a concave-convex structure 22 for diffusing light is formed on the surface of the first colloidal layer 20 , and then the first colloidal layer 20 with the concave-convex structure 22 is cured. Wherein, the concave-convex structure 22 can be formed by mold transfer method, at this time, the concave-convex structure 22 is integrated with the first colloid layer 20 . In addition, particles can be sprinkled directly on the surface of the first colloidal layer 20 to form a concave-convex structure on the surface of the first colloidal layer 20; A concavo-convex interface is formed between the first colloidal layer 20 and the second colloidal layer 30 . The particles have optical properties of transparency and high refractive index.

Next, coat an uncured light-transmitting second colloidal layer 30 on the concave-convex structure 22 , and then cure the second colloidal layer 30 . After the second colloidal layer 30 is cured, it has a certain hardness, so when forming the prism 42 of the third colloidal layer 40 , it can play a supporting role. The second colloidal layer 30 needs an appropriate thickness, preferably greater than the first colloidal layer 20 , which can play a supporting role without damaging the concave-convex structure 22 .

Next, a light-transmitting third colloidal layer 40 is coated on the surface of the second colloidal layer 30 , and then, a plurality of light-condensing prisms away from the second colloidal layer 30 are formed on the surface of the third colloidal layer 40 42, and then curing the third colloidal layer 40 with prisms 42. Wherein, the prisms 42 can be formed by using a mold transfer method.

In particular, the first colloid layer 20 can be directly formed on the lower protective film 10 first, that is, the lower protective film 10 can serve as a base material first, and then be torn off when the light guide 100 is used. After the third colloidal layer 40 is cured, the upper protective film 50 can be covered on the prism 42 and then peeled off when the light guide 100 is used.

The third colloidal layer 40 can be directly cured by UV light. The first colloidal layer 20 and the second colloidal layer 30 can be cured according to the general curing method of the materials used, such as electron beam radiation curing, thermal curing and so on.

It can be understood that those skilled in the art can make various other corresponding changes and modifications according to the technical concept of the present invention, and all these changes and modifications should belong to the protection scope of the claims of the present invention.

Claims (7)

1. a core manufacturing process, it comprises the steps:

Form the first colloid layer of a uncured printing opacity;

Form the concaveconvex structure of diffusion light in the surface of this first colloid layer, this concaveconvex structure is formed by mould transfer printing;

Solidify the first colloid layer that this has concaveconvex structure;

The second colloid layer of the printing opacity that coating one is uncured on this concaveconvex structure, this first colloid layer makes with identical material with this second colloid layer, and this second colloid layer does not fill up the recess of this concaveconvex structure completely;

Solidify this second colloid layer;

The 3rd colloid layer of a uncured printing opacity is applied in the surface of this second colloid layer;

Multiple prism deviating from the optically focused of this second colloid layer is formed in the surface of the 3rd colloid layer; And

Solidify the 3rd colloid layer that this has prism.

2. core manufacturing process as claimed in claim 1, is characterized in that: also comprise the lower diaphragm providing to have a release property, this first colloid layer is directly formed on this lower diaphragm.

3. core manufacturing process as claimed in claim 2, is characterized in that: also comprise the upper protective film providing to have a release property, this upper protective film is covered on the prism of the 3rd colloid layer.

4. core manufacturing process as claimed in claim 3, is characterized in that: comprise the step tearing off this lower diaphragm and upper protective film further.

5. core manufacturing process as claimed in claim 1, it is characterized in that: this first colloid layer and this second colloid layer are selected from the one in epoxy resin, polymethyl acrylate and silica gel, the material of the 3rd colloid layer is UV glue.

6. a light conductor, it comprises the first colloid layer of sequentially stacked, the printing opacity that solidify to form integrative-structure respectively, the second colloid layer and the 3rd colloid layer, the interface that this first colloid layer connects this second colloid layer is formed with the concaveconvex structure of multiple diffusion light, 3rd colloid layer is formed with multiple prism deviating from the optically focused of this second colloid layer, this first colloid layer makes with identical material with this second colloid layer, and this second colloid layer does not fill up the recess of this concaveconvex structure completely.

7. light conductor as claimed in claim 6, it is characterized in that: this first colloid layer and this second colloid layer are selected from the one in epoxy resin, polymethyl acrylate and silica gel, the material of the 3rd colloid layer is UV glue.