TWI393956B - Flexible backlight module structure - Google Patents

Description

Flexible backlight module structure

The invention is a flexible backlight module structure, in particular to a flexible backlight module structure applied to a backlight module.

The liquid crystal display is a display widely used in the market, and its application range includes a mobile phone screen, a notebook computer, a digital camera, and the like. Generally, a liquid crystal display panel and a backlight module are two important components constituting a liquid crystal display. Among them, the liquid crystal display panel is responsible for color rendering, but since the liquid crystal display panel itself does not have the function of emitting light, it is necessary to configure a backlight module behind the liquid crystal display panel, and the backlight module can provide a sufficient light source to enable the liquid crystal display. Can display images.

Most of the large-size displays that are currently being actively developed are used for outdoor advertising, such as displays on the walls of large buildings. When making a large-scale outdoor display, if it faces an irregular shape, it is necessary to make several small displays and then join each other to form a large display. However, the steps of first making a small display and then joining it will affect the production cost and time of the large display. As for the small-sized display, the application range is also limited due to being limited to the shape of the system.

A flexible backlight module disclosed in the Chinese Patent No. I270724, "Flexible Backlight Module and Manufacturing System Therefor", comprising a lower flexible board having a plurality of grooves; at least one light guiding element , the system is disposed in the groove, the light guiding element can provide light from the opening of the groove; and a soft The board is covered on the lower soft board, and the upper soft board can receive the light emitted by the groove, and finally is emitted by the upper soft board.

In the above prior art, the flexible module has a flexible characteristic, so that the backlight module can be bent, so that the backlight module can fit an irregularly shaped object, thereby simplifying the manufacturing steps of the large display. However, the backlight module uses a light guiding material to couple the light from the light source to the backlight module. Therefore, the light emitted by the light source may cause light leakage during the light coupling process, which affects the performance of the overall backlight module.

The invention relates to a flexible backlight module structure, which is composed of a light source module and a flexible light guide plate, wherein the flexible light guide plate has the characteristics of being flexible, so that it can be bent for various types. The product is used in combination. Moreover, the light-incident surface of the flexible light guide plate is optically coupled with the light source module integrally formed by the mold injection molding method, thereby simplifying the assembly steps and components of the flexible backlight module. In addition, since there is no medium close contact between the light incident surface and the light source module, the light source provided by the light source module can be completely coupled into the flexible light guide plate after passing through the light incident surface, thereby avoiding Light leakage creates and increases the luminous efficiency of the flexible backlight module.

In order to achieve the above object, the present invention provides a flexible backlight module structure including: a light source module; and a flexible light guide plate having a light incident surface, a reflective surface, and a light exiting surface, and The light-incident surface is integrally formed and closely adheres to the light source module.

With the implementation of the present invention, at least the following advancements can be achieved:

1. The light source module is a combination of direct coupling with the light guide plate, so that the light breakage rate is effectively reduced, thereby increasing the luminous intensity of the backlight module.

Second, the assembly steps and components are simplified, so that the manufacturing cost of the backlight module is reduced.

Third, the flexible backlight module can be bent according to the needs of use, thereby increasing the applicability.

In order to make those skilled in the art understand the technical content of the present invention and implement it, and according to the disclosure, the patent scope and the drawings, the related objects and advantages of the present invention can be easily understood by those skilled in the art. The detailed features and advantages of the present invention will be described in detail in the embodiments.

1 is a perspective view of a flexible embodiment of a flexible backlight module 10 of the present invention. 2 is a perspective view of a flexible embodiment of a flexible backlight module 10 of the present invention. Figure 3 is a cross-sectional view taken along line A-A of Figure 2; 4 is a cross-sectional view showing a third embodiment of a flexible backlight module structure 10 of the present invention. Figure 5 is a cross-sectional view showing a fourth embodiment of a flexible backlight module structure 10 of the present invention.

As shown in FIG. 1 , FIG. 2 and FIG. 3 , the embodiment is a flexible backlight module structure 10 including: a light source module 20 ; and a flexible light guide plate 30 .

The light source module 20 can be a cold cathode tube light source module 20 or a light emitting diode light source module 20. When a cold cathode tube light source module 20 is used, a line source will be provided. When a single light-emitting diode light source module 20 is used, A light source is provided. If a plurality of light-emitting diode light source modules 20 are used at the same time, a line light source can also be formed.

The flexible light guide plate 30 may be in the form of a strip or a plate, and each has a light incident surface 31, a reflective surface 32 and a light exit surface 33, and the material of the flexible light guide plate 30 may be one. A flexible light guide, a silicone, an epoxy or a mixture of a silicone and an epoxy resin.

The light incident surface 31 of the flexible light guide plate 30 is directly coupled to the light source module 20 by optical coupling, for example, by means of a mold injection molding method, and the silicone rubber and the light source module 20 are integrally molded and combined.

Since the light-incident surface 31 and the light source module 20 are integrally formed, the components in the flexible backlight module 10 are simplified, and the overall manufacturing cost is reduced. At the same time, since there is no medium close contact between the light incident surface 31 and the light source module 20, the light emitted from the light source module 20 can be completely coupled into the flexible light guide plate 30 after passing through the light incident surface 31. . In order to avoid light leakage and light loss, the luminous efficiency of the flexible backlight module 10 can be further increased.

After the incident light of the light source module 20 enters the strip-shaped or plate-shaped flexible light guide plate 30 through the light-incident surface 31, the light is emitted from the reflective surface 32 to the light-emitting surface 33 to emit light. The reflective surface 32 can have a plurality of reflective structures 321 , for example, a plurality of reflective convex portions, a plurality of tapered convex bodies, a plurality of square dot structures, a plurality of irregular shaped dot structures, grooves, and grooves. .Wait. By the arrangement of the plurality of reflective structures 321 , the angle of reflection of the incident light can be controlled so that all incident light can be reflected to the light exit surface 33 .

At the same time, the light-emitting surface 33 of the flexible light guide plate 30 may have a plurality of microstructures 331, for example, a plurality of microlenses, a plurality of grooves, a plurality of collectors, A plurality of dot-like projections...etc. A plurality of microstructures 331 are used to regulate the light from the reflecting surface 32, and the plurality of microstructures 331 function to adjust the light exiting angle. The light passing through the light-emitting surface 33 of the flexible light guide plate 30 can be made to have uniform light or concentrated light.

When the flexible light guide plate 30 is strip-shaped, it can be applied to the small-sized flexible backlight module structure 10. When the flexible light guide plate 30 is in the shape of a plate, it can be applied to the large flexible backlight module structure 10. Moreover, since they all have the property of being flexible, they can be bent and deformed according to actual needs, and even an object having an irregular shape can be attached without being limited by the shape, thereby increasing the applicability.

As shown in FIG. 4, in the flexible light guide plate 30 of the third embodiment, the reflective surface 32 can be formed with a metal reflective layer 322 to increase the amount of light emitted from the light exit surface.

As shown in FIG. 5, in the fourth embodiment, since the flexible light guide plate 30 has a flexible property, the flexible backlight module 10 can be applied to the use of bending deformation. When the flexible light guide plate 30 is formed into a curved shape, both the reflective surface 32 and the light-emitting surface 33 will be simultaneously bent.

In order to avoid the light incident on the light source module 20, the light path is distorted due to the curved shape of the reflective surface 32 and the light exit surface 33, resulting in a problem that the intensity of the light source is weakened in the region away from the light source module 20. The reflective surface 32 and the light-emitting surface 33 of the flexible light guide plate 30 can be provided with a plurality of reflective structures 321 and a plurality of microstructures 331 at the same time.

The plurality of reflective structures 321 and the plurality of microstructures 331 are arranged to cooperate with each other, so that the incident light is not affected by the bending of the flexible light guide plate 30, and can be evenly distributed in the entire flexible backlight module structure 10, thereby generating the most Good luminous efficiency. Therefore, the flexible backlight module structure 10 can be adapted to practical application requirements. It bends freely and is still stable to provide optimum luminous efficiency.

The plurality of reflective structures 321 and the metal reflective layer 322 of the reflective surface 32 of the flexible light guide plate 30 and the plurality of microstructures 331 of the light-emitting surface 33 of the flexible light guide plate 30 are all practical. Demand selection and implementation are implemented to achieve the best results.

The embodiments are described to illustrate the features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the present invention and to implement the present invention without limiting the scope of the present invention. Equivalent modifications or modifications made by the spirit of the disclosure should still be included in the scope of the claims described below.

10‧‧‧Flexible backlight module structure

20‧‧‧Light source module

30‧‧‧Flexible light guide

31‧‧‧Into the glossy surface

32‧‧‧reflecting surface

321‧‧‧Reflective structure

322‧‧‧Metal reflector

33‧‧‧Glossy

331‧‧‧Microstructure

1 is a perspective view of a flexible embodiment of a flexible backlight module of the present invention.

2 is a perspective view of a flexible embodiment of a flexible backlight module of the present invention.

Figure 3 is a cross-sectional view taken along line A-A of Figure 2;

4 is a cross-sectional view showing a third embodiment of a flexible backlight module structure of the present invention.

Figure 5 is a cross-sectional view showing a fourth embodiment of a flexible backlight module structure of the present invention.

10‧‧‧Flexible backlight module structure

20‧‧‧Light source module

30‧‧‧Flexible light guide

31‧‧‧Into the glossy surface

32‧‧‧reflecting surface

322‧‧‧Reflective structure

33‧‧‧Glossy

332‧‧‧Microstructure

Claims (15)

A flexible backlight module structure includes: a light source module; and a flexible light guide plate having a light incident surface, a reflective surface, and a light exiting surface, and the light incident surface is integrally formed and The light source module is directly coupled by light coupling. The flexible backlight module structure of claim 1, wherein the light source module is a cold cathode tube light source module. The flexible backlight module structure of claim 1, wherein the light source module is a light emitting diode light source module. The flexible backlight module structure of claim 1, wherein the flexible light guide plate has a plate shape. The flexible backlight module structure of claim 1, wherein the flexible light guide plate has a strip shape. The flexible backlight module structure of claim 1, wherein the flexible light guide plate is made of a flexible light guide material. The flexible backlight module structure of claim 1, wherein the flexible light guide plate is made of a silicone. The flexible backlight module structure of claim 1, wherein the flexible light guide plate is made of an epoxy resin. The flexible backlight module structure of claim 1, wherein the flexible light guide plate is made of a mixture of a silicone and an epoxy resin. The flexible backlight module structure according to claim 1, wherein The reflective surface has a plurality of reflective structures. The flexible backlight module structure of claim 1, wherein the reflective surface is formed with a plurality of reflective protrusions. The flexible backlight module structure of claim 1, wherein the reflective surface forms a metal reflective layer. The flexible backlight module structure of claim 1, wherein the illuminating surface is formed with a plurality of microlenses. The flexible backlight module structure of claim 1, wherein the light emitting surface has a plurality of microstructures. The flexible backlight module structure of claim 1, wherein the reflective surface has a plurality of reflective structures, and the light emitting surface has a plurality of microstructures.