CN112859218A

CN112859218A - Backlight module with diffusion and spotlight functions

Info

Publication number: CN112859218A
Application number: CN202110259737.5A
Authority: CN
Inventors: 陈雪莲; 林俊良; 叶茂村; 林金汉; 林金锡
Original assignee: Changzhou Almaden Co Ltd
Current assignee: Changzhou Almaden Co Ltd
Priority date: 2021-03-10
Filing date: 2021-03-10
Publication date: 2021-05-28

Abstract

The invention relates to a backlight module with diffusion and condensation functions, which comprises an LED light source, a diffusion film, a diffusion plate and an upper prism optical film, wherein the LED light source, the diffusion film, the diffusion plate and the upper prism optical film are sequentially arranged, a first prism structure is arranged on a light-emitting surface of the diffusion plate in a protruding mode, a second prism structure is arranged on a light-in surface of the diffusion plate in an inwards recessed mode, and the diffusion plate is fixed on the LED light source through the diffusion film. The LED backlight module is simple in structure, and the first prism structure of the light-emitting surface and the second prism structure of the light-entering surface of the diffusion plate are adopted, so that light rays emitted from the LED light source are subjected to light equalizing treatment by the second prism structure and then are condensed by the first prism structure.

Description

Backlight module with diffusion and spotlight functions

Technical Field

The invention relates to the technical field of display, in particular to a backlight module with diffusion and condensation functions.

Background

In the conventional backlight module, a PC diffusion plate is used in combination with a prism optical film to achieve light source diffusion and light collection effects, but the function of the diffusion plate in the backlight module is limited by the material problems of the product, such as strength problem, heat resistance problem, deformation problem, and uniformity problem of diffusion particles. In the traditional backlight module, an led light source firstly emits light into a base material of a diffusion plate, the light source is diffused by diffusion particles in the diffusion plate, and then the light source is guided to be direct light by an upper prism optical film and a lower prism optical film; go up the prism structure and be the striation prism, the striation prism can be concentrated light in the vertical direction, and lower prism structure is perpendicular striation prism, can concentrate light in the horizontal direction to reach the demand that the light source is from the pointolite to the area source. However, the structure of the conventional backlight module is complicated, which is not favorable for the thinning process of the backlight module.

Disclosure of Invention

In order to save cost and improve structural stability, the invention provides a backlight module with diffusion and condensation functions, which comprises an LED light source, a diffusion film, a diffusion plate and an upper prism optical film, wherein the LED light source, the diffusion film, the diffusion plate and the upper prism optical film are sequentially arranged, a first prism structure is arranged on a light-emitting surface of the diffusion plate in a protruding mode, a second prism structure is arranged on a light-in surface of the diffusion plate in an inwards recessed mode, and the diffusion plate is fixed on the LED light source through the diffusion film.

Preferably, the first prism structure is a two-dimensional prism. The two-dimensional prism collimates the light into direct light.

Furthermore, the thickness of the diffusion adhesive film is 0.3-0.8 mm, the light transmittance is 55-70%, and the haze is more than 95%.

Preferably, the material of the diffusion adhesive film is OCA optical adhesive. The diffusion film is added with a certain proportion of diffusion particles, so that the diffusion effect is improved.

Furthermore, the light transmittance of the diffusion plate is between 90% and 93%, the thickness of the diffusion plate is between 1.1 mm and 3mm, and the haze of the diffusion plate is within a range of 60 mm to 85 mm.

Has the advantages that: the LED backlight module is simple in structure, and the first prism structure of the light-emitting surface and the second prism structure of the light-entering surface of the diffusion plate are adopted, so that light rays emitted from the LED light source are subjected to light equalizing treatment by the second prism structure and then are condensed by the first prism structure.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of a prism structure of a diffuser plate according to the present invention;

FIG. 3 is a schematic view of a second prism structure of a diffuser plate according to the present invention;

in the figure: 1. a led light source; 2. a diffusion glue film; 3. a diffusion plate; 4. an upper prism optical film; 5. a first prism structure; 6. and a second prism structure.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the invention. In the description of the present invention, it is to be understood that the terms "upper", "top", "bottom", and the like, as used herein, refer to an orientation or positional relationship based on that shown in the drawings, which is for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be taken as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.

Example 1

The utility model provides a backlight unit with diffusion and spotlight function, is including led light source 1, diffusion glued membrane 2, diffuser plate 3 and the last prism optical diaphragm 4 that sets gradually, the outstanding prism structure 5 that is equipped with on the play plain noodles of diffuser plate 3, the income plain noodles of diffuser plate 3 is inwards sunken to have prism structure two 6, diffuser plate 3 passes through diffusion glued membrane 2 is fixed on led light source 1. Diffusion plate 3 is fixed on led light source 1 through diffusion glued membrane 2 for whole backlight unit's thickness attenuation has improved the aesthetic property, again because set up inside sunken prism structure two 6 and diffusion glued membrane 2 on diffusion plate 3, makes led light source 1 and diffusion plate 3 keep certain distance, has improved the effect of homogenizing light.

The first prism structure 5 is a two-dimensional prism. The two-dimensional prism collimates the light into direct light.

The thickness of the diffusion adhesive film 2 is 0.3-0.8 mm, the light transmittance is 55-70%, and the haze is more than 95%.

The material of the diffusion glue film 2 is OCA optical glue. The diffusion film 2 is added with a certain proportion of diffusion particles, so that the diffusion effect is improved.

The light transmittance of the diffusion plate 3 is between 90% and 93%, the thickness of the diffusion plate is 1.1 mm to 3mm, and the haze of the diffusion plate is within a range of 60 mm to 85 mm.

The working principle is as follows: the led light source 1 firstly emits light into the diffusion film 2, the dense light sources are primarily dispersed by diffusion particles in the diffusion film 2 and then reach the light incident surface of the diffusion plate, the prism structure II 6 on the light incident surface can further diffuse light to achieve the effect of secondary light equalization, and the prism structure I5 on the light emergent surface of the diffusion plate is matched with the prism optical film 4 to guide the light into direct light.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a backlight unit with diffusion and spotlight function which characterized in that: including led light source (1), diffusion glued membrane (2), diffuser plate (3) and the last prism optical diaphragm (4) that set gradually, the outstanding prism structure (5) that are equipped with on the play plain noodles of diffuser plate (3), the income plain noodles of diffuser plate (3) is inwards sunken to have prism structure two (6), diffuser plate (3) pass through diffusion glued membrane (2) are fixed on led light source (1).

2. The backlight module with diffusion and light condensation functions as claimed in claim 1, wherein: the first prism structure (5) is a two-dimensional prism.

3. The backlight module with diffusion and light condensation functions as claimed in claim 1, wherein: the thickness of the diffusion adhesive film (2) is 0.3-0.8 mm, the light transmittance is 55-70%, and the haze is more than 95%.

4. The backlight module with diffusion and light condensation functions as claimed in claim 1, wherein: the diffusion adhesive film (2) is made of OCA optical adhesive.

5. The backlight module with diffusion and light condensation functions as claimed in claim 1, wherein: the light transmittance of the diffusion plate (3) is between 90% and 93%, the thickness of the diffusion plate is 1.1 mm to 3mm, and the haze of the diffusion plate is within a range of 60 mm to 85.