TWM559419U - Backlight module and display module - Google Patents

Abstract

The present invention provides a backlight module, comprising: a light-polarized light guide plate for outputting a polarized light, the light-polarized light guide plate having a light guide plate body and a core layer, wherein the light guide plate body has a reflecting surface and a light emitting surface, the core layer is attached to the light emitting surface of the light guide plate body; a cymbal piece having one side of the cymbal having a plurality of ridges, and the plurality of lanthanum faces the core layer And a reflector disposed on the reflective surface of the light guide body.

Description

Backlight module and display module

The present invention relates to a backlight module and a display module, and more particularly to a backlight module and a display module having a light polarization function of the light guide plate.

Referring to FIG. 1 , the backlight module of the liquid crystal display of the prior art mainly includes: a light guide plate 11 , a cymbal sheet 20 , a brightness enhancement film 200 , and a reflection plate 30 . The light guide plate 11 has a flat shape. The reflector 30 is located on one side of the light guide plate 11. After the light is reflected by the reflector 30 into the light guide plate 11, the light guide plate 11 is advanced in the total reflection mode. The reflective structure on the back surface of the light plate 11 destroys the total reflection, and then can be emitted from the light exit surface of the light guide plate 11, and the light emitted from the light guide plate 11 is omnidirectional, non-polarized light, the omnidirectional, non-polarized When the light is directed upward to the conventional cymbal 20, since the conventional cymbal 20 is a refracting light principle, the directivity of the light is easily affected by the optical axis of the substrate of the conventional cymbal 20, so that the omnidirectional and non-polar The light is not fully utilized. As a result, the above reasons relatively reduce the light usage rate of the overall backlight module. Therefore, it is indeed necessary to further improve the configuration of the above conventional backlight module to produce polarized light that can be applied to the cymbal 20.

In view of the above-mentioned shortcomings of the prior art, the main object of the present invention is to provide a backlight module, which improves the internal structure and composition of the backlight module, so that the light emitted from the light guide plate is polarized light, and the light pole The effect is more significant and contributes to the overall light utilization efficiency, and the overall thickness and production cost of the backlight module can be reduced, further taking into consideration the production cost and the design structure of the thin display.

In order to achieve the foregoing and other objects, a backlight module of the present invention includes: a light-polarized light guide plate for outputting a polarized light, the light-polarized light guide plate having a light guide plate body and a core layer The light guide plate body has a reflective surface and a light exiting surface, the core layer is attached to the light emitting surface of the light guide plate body; a cymbal sheet having one side of the cymbal sheet having a plurality of ridges The plurality of turns are oriented toward the core layer; and a reflector is disposed on the reflective surface of the light guide body.

When the backlight module of the present invention is used, the polarized light guide plate having the core layer can output the polarized light from the light emitting surface of the light guide plate body without conventionally being equipped with an upper surface layer. And the brightness enhancement film of the lower surface layer, wherein the polarized light generated by the light guide plate body passes through the cymbal in the direction corresponding to the optical axis to make the polarization effect more prominent, which helps the backlight module as a whole to have better performance. Light utilization efficiency, if one of the alignment angle of the cymbal or the angle of the protruding gusset of the plurality 稜鏡 changes, the present invention also needs to change the characteristics of the core layer to produce polarized light of different characteristics. In view of the angle of the alignment of the cymbal or the angle of the protruding gusset of the plurality 稜鏡, that is, the optically polarized light guide plate of different characteristics needs an alignment angle with the cymbal or the protrusion of the plurality of cymbals The angles of the chamfers are matched to each other to maintain optimal optical polarization.

In addition, a layer of brightness enhancing film is required to be aligned during assembly, so that the purpose of reducing the thickness, reducing the process, and reducing the production cost and designing the structure of the thinned display can be achieved; and, since the core layer is interposed The slab and the light guide plate body of the light-polarized light guide plate can also protect the light guide plate body from being damaged by the plurality of ridges on the cymbal when the backlight module is pressed.

The embodiments of the present invention are described below by way of specific embodiments, and those skilled in the art can readily appreciate other advantages and functions of the present invention from the disclosure herein. The present invention may be embodied or applied in various other specific embodiments. The various details of the present invention can be modified and changed without departing from the spirit and scope of the invention.

It is to be understood that the structure, the proportions, the size and the like of the drawings are only used in conjunction with the disclosure of the specification for understanding and reading by those skilled in the art, and are not intended to limit the implementation of the present invention. Conditions, so it is not technically meaningful, any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects of the new model and the purpose that can be achieved, should fall within the scope of the present invention. The technical content can be covered.

Hereinafter, a backlight module will be described in accordance with an embodiment of the present invention.

As shown in FIG. 2 to FIG. 7 , the backlight module of the present invention comprises: a light-polarized light guide plate 10 for outputting a polarized light, and the light-polarized light guide plate 10 has a light guide plate body 11 and a core layer 12, wherein the light guide plate body 11 has a reflective surface 100 and a light exiting surface 101. The core layer 12 is attached to the light emitting surface 101 of the light guide plate body 11; One side of the lens 20 has a plurality of turns 21, and the plurality of turns 21 are oriented toward the core layer 12; and a reflector 30 is disposed on the reflective surface 100 of the light guide plate body 11.

The core layer 12 is formed by removing the upper surface and the lower surface by a conventional brightness enhancement film, and is disposed on the light guide plate body 11 in an attached manner (as shown in FIGS. 2 to 4).

In a possible embodiment, the light-emitting surface 101 of the light guide plate body 11 has a smooth surface (as shown in FIG. 4).

In another possible embodiment, the light-emitting surface 101 of the light guide plate body 11 has one of a plurality of light guiding structures 102 extending along a first direction (as shown in FIG. 5).

The core layer 12 has a plurality of birefringent polymer layers; the substrate of the cymbal 20 has an alignment angle of 50 degrees, and the complex 稜鏡21 has a protruding angle of 68 degrees; the complex birefringent polymer layer has at least More than 300 layers.

As shown in FIG. 7 , the present invention includes a display module 400 including a liquid crystal module 300 and the backlight module described above, wherein the liquid crystal module 300 is located in front of the backlight module.

The backlight module of the present invention can output the polarized light from the light-emitting surface 101 of the light guide plate body 11 by using the light-polarized light guide plate 10 having the core layer 12 (as shown in FIG. 3 and FIG. 6). There is no need for a brightness enhancement film 200 (shown in FIG. 1) which is conventionally equipped with an upper surface layer and a lower surface layer, and the polarized light generated by the light guide plate body 11 passes through the cymbal 20 corresponding to the optical axis direction. The light polarization effect is more significant, which helps the backlight module as a whole to have better light utilization efficiency. If one of the alignment angles of the cymbals 20 or the angle of the protruding gussets of the plurality 稜鏡 21 changes, The new type also needs to change the characteristics of the core layer 12 to produce polarized light of different characteristics in order to respond to the aforementioned angle of alignment of the cymbal 20 or the angle of the protruding angle of the plurality 稜鏡 21, that is, different The light-polarized light guide plate 10 of the characteristics needs to be matched with the angle of alignment of the cymbal 20 or the angle of the protruding knurl of the plurality 稜鏡 21 to maintain an optimum optical polarization effect.

In addition, the present invention also lacks a brightness enhancement film (as shown in FIG. 1) when assembling the backlight module, thereby achieving the purpose of reducing the thickness, reducing the process, and reducing the production cost and the design structure of the thin display; Moreover, since the core layer 12 is interposed between the cymbal 20 and the light guide plate body 11 of the optically polarizing light guide plate 10, the light guide plate body 11 can be protected from the cymbal 20 The plural 稜鏡 21 is damaged when the backlight module is pressed.

Although the embodiments have been described with reference to the embodiments of the present invention, it will be understood that Inside. In particular, various changes and modifications can be made in the components and/or arrangements of the subject combination. Alternative uses will be apparent to those skilled in the art, in addition to variations and modifications in the component parts and/or arrangements.

10‧‧‧Light Polarized Light Guide
11‧‧‧Light guide body
12‧‧‧ core layer
20‧‧‧ Picture
21‧‧‧稜鏡
30‧‧‧reflector
100‧‧‧reflecting surface
101‧‧‧Glossy surface
102‧‧‧Light guiding structure
200‧‧‧Brightening film
300‧‧‧LCD Module
400‧‧‧ display module

1 is a schematic view showing the light transmission of a backlight module of a conventional liquid crystal display; FIG. 2 and FIG. 3 are schematic diagrams showing the structure of the backlight module of the present invention; FIG. 4 is a view showing an implementation of the optical polarization light guide plate of the present invention. FIG. 5 is a schematic structural view showing another embodiment of the optical polarization light guide plate of the present invention; FIG. 6 is a schematic view showing light transmission of the backlight module of the present invention; and FIG. 7 is a backlight showing the present invention. The module is combined with a structural diagram of a liquid crystal module.

Claims (7)

A backlight module includes: a light-polarized light guide plate for outputting a polarized light, the light-polarized light guide plate has a light guide plate body and a core layer, wherein the light guide plate body has a reflective surface And a light emitting surface, the core layer is attached to the light emitting surface of the light guide plate body; a cymbal piece having one side of the cymbal having a plurality of ridges, and the plurality of lanthanum faces the core layer; The reflector is disposed on the reflective surface of the light guide body. The backlight module of claim 1, wherein the light-emitting surface of the light-guiding plate body is a smooth surface, and one of the plurality of light-guiding structures is protruded along a first direction. By. The backlight module of claim 1, wherein the core layer has a plurality of birefringent polymer layers. The backlight module of claim 3, wherein the substrate of the cymbal has an alignment angle of 50 degrees. The backlight module of claim 4, wherein the plurality of protrusions have a protruding angle of 68 degrees. The backlight module of claim 3, wherein the plurality of birefringent polymer layers have at least 300 layers or more. A display module includes a liquid crystal module and the backlight module according to any one of the preceding claims, wherein the liquid crystal module is located in front of the backlight module.