TWM521195U - Light guiding plate, backlight module, and display device - Google Patents

Abstract

A light guiding plate is provided, including a main body, a plurality of dot-shaped microstructures, and a plurality of line-shaped microstructures. The dot-shaped microstructures are formed on the main body separately. The line-shaped microstructures are formed on a surface of the dot-shaped microstructure, wherein a crest line of those line-shaped microstructures is intermittent and irregular.

Description

Light guide material, backlight module and display device

This creation is about a light guide. More specifically, the present invention relates to a light guide material having a dot microstructure and a strip microstructure.

The Backlight Module (BLM) is one of the important components of the display device. Since the display panel (for example, the liquid crystal display panel) in the display device does not emit light by itself, it is necessary to project light through the light source of the backlight module to achieve the function of display.

The backlight module is divided into an edge type (Edge Type) and a direct type (Direct Type) according to the position of the light source, wherein the side light type structure is to set the light source on the side of the light guide material, in order to change the light exit direction, Light materials usually have a light guiding structure that destroys total reflection. However, conventional light guiding structures have high directivity, so hot spots are clearly visible.

In order to solve the above problems, the present invention provides a light guiding material comprising a body, a plurality of dot-shaped microstructures and a plurality of strip-shaped microstructures. The dot-like microstructures are formed separately on the body. Strip microstructures are formed on the surface of the dot-like microstructure, and the ridgelines of the individual strip-shaped microstructures are intermittently arranged irregularly.

In an embodiment of the present invention, at least a portion of the strip-shaped microstructures are extended along a first direction.

In an embodiment of the present invention, at least another portion of the strip-shaped microstructure is extended along a second direction, and the first direction is different from the second direction.

In an embodiment of the present invention, the strip-shaped microstructures have different shapes.

In an embodiment of the present invention, the body has a first side and a second side, and the first side is adjacent to a light source and opposite to the second side. The number of the aforementioned point-like microstructures gradually increases from the first side toward the first side toward the second side.

In an embodiment of the present invention, the body has a light incident surface, a reflective surface, and a light exiting surface. The light incident surface faces a light emitting source and connects the reflective surface and the light emitting surface, and the dot microstructure is formed on the reflective surface.

In an embodiment of the present invention, the body has a light incident surface, a reflective surface, and a light exiting surface. The light incident surface faces a light emitting source and connects the reflecting surface and the light emitting surface, and the dot microstructure is formed on the light emitting surface.

In an embodiment of the present invention, the roughness of the point microstructure (Ra) is between 1 and 999 nm, and does not include an endpoint value.

An embodiment of the present invention further provides a backlight module, comprising the foregoing light guide material and a light source, wherein the light emitted by the light source enters the light guide material and is reflected or refracted by the strip microstructure to leave the light guide material.

An embodiment of the present invention further provides a display device, including the foregoing The backlight module and a display panel, wherein the display panel is located in front of the body of the light guide material.

10‧‧‧Light guide

20‧‧‧Light source

100‧‧‧ body

101‧‧‧Into the glossy surface

102‧‧‧reflecting surface

103‧‧‧Glossy surface

104‧‧‧ first side

105‧‧‧ second side

106‧‧‧Parallel blocks

110‧‧‧ point microstructure

120‧‧‧ strip microstructure

A1‧‧‧ first direction

A2‧‧‧ second direction

B‧‧‧Backlight module

D‧‧‧ display panel

FIG. 1 is a schematic view showing a backlight module according to an embodiment of the present invention.

Fig. 2A is a bottom view showing the backlight module shown in Fig. 1.

2B is a schematic view showing a backlight module of another embodiment of the present invention.

2C is a schematic view showing a backlight module of another embodiment of the present invention.

2D is a schematic diagram of a backlight module according to another embodiment of the present invention.

Figure 3 is a schematic view showing that light enters the light guide material from the light incident surface and exits the light guide material from the light exit surface.

Figure 4 is a schematic view showing a backlight module of another embodiment of the present invention.

Fig. 5 is a view showing a display device of an embodiment of the present invention.

The light guide material, the backlight module, and the display device of the present embodiment will be described below. However, it will be readily appreciated that the present creative embodiment provides many suitable creative concepts and can be implemented in a wide variety of specific contexts. The specific embodiments disclosed are merely illustrative of the use of the present invention in a particular way, and are not intended to limit the scope of the present invention.

It will be understood that the terms "first", "second", and the like may be used to describe various elements, components, regions, layers, and/or portions, such elements, components, regions, layers, and / The terms are not limited by the terms, and are used to distinguish different elements, components, regions, layers, and/or parts.

Referring to FIG. 1 , the backlight module B of the embodiment of the present invention mainly includes a light guide member 10 and a light source 20 , wherein the body 100 of the light guide member 10 has a light incident surface 101 , a reflective surface 102 , and a light-emitting surface 103, the light-incident surface 101 is connected to the reflective surface 102 and the light-emitting surface 103 and faces the light-emitting source 20, so that the light generated by the light-emitting source 20 can pass through the light-incident surface 101 and enter the light guide material substantially along a first direction A1. 10 in. The light source 20 may include, for example, a plurality of light emitting diodes (LEDs) or cold cathode fluorescent lamps (CCFLs).

As shown in FIGS. 1 and 2A, in the present embodiment, a plurality of dot-shaped microstructures 110 are formed on the reflecting surface 102 of the body 100, and protrude from the reflecting surface 102. The dot-like microstructures 110 are separated from each other, and a plurality of strip-shaped microstructures 120 separated from each other are further formed on the surface of each of the dot-like microstructures 110. It should be noted that in each of the dot microstructures 110, at least a portion of the strip-like microstructures 120 are spaced apart from each other along the first direction A1, and at least another portion is spaced apart from each other along a second direction A2. The ground direction is set such that the first direction A1 is different from the second direction A2, for example, perpendicular to each other.

It should be particularly noted that the strip microstructure 120 can be formed by laser or etching, and its roughness mean roughness (Ra) is between 1 and 999 nm (excluding the endpoint value), and each strip The microstructures 120 can have different shapes and sizes.

In this embodiment, each of the strip-shaped microstructures 120 extends in the first direction A1. However, in some embodiments, the strip-shaped microstructures 120 may also extend in other directions. As shown in FIG. 2B, in another embodiment of the present invention, each of the strip-shaped microstructures 120 extends in the second direction A2. As shown in Figure 2C, this creation is another In an embodiment, a portion of the strip-shaped microstructures 120 extend in a first direction A1 and a portion of the strip-shaped microstructures 120 extend in a second direction A2. As also shown in FIG. 2D, in another embodiment of the present invention, the strip-shaped microstructures 120 may also extend in an oblique direction.

Referring to FIGS. 2A-2D, a plurality of parallel blocks 106 of the same size may be defined between the first side 104 and the second side 105 on the opposite side of the body 100 of the light guide material 10, wherein the first side 104 is adjacent to the foregoing The light source 20 is emitted. Each of the parallel blocks 106 includes a different number of dot-like microstructures 110. The parallel blocks 106 farther from the light source 20 contain more dot-like microstructures 110, and are closer to the light source 20. The block 106 contains fewer point-like microstructures 110, i.e., the number of spot-like microstructures 110 gradually increases from a first side 104 adjacent the light guide 10 toward a second side 105. Moreover, in the present embodiment, the dot-like microstructures 110 in each of the parallel blocks 106 are evenly disposed, so that the dot-like microstructures 110 in the respective parallel blocks 106 have the same spacing from each other.

As shown in FIG. 3, after a part of the light generated by the light source 20 passes through the light incident surface 101 and enters the light guide material 10, it is continuously totally reflected between the reflective surface 102 and the light exit surface 103, and the light contacts the reflective surface 102. After the dot microstructure 110 on the surface and the strip microstructure 120 on the surface of the dot microstructure 110, the angle of reflection of the light is changed, so that the total reflection can be destroyed to cause the light to exit the light guide 10 from the light exit surface 103.

Since the strip-shaped microstructures 120 have a nanostructure (roughness between 1 and 999 nm), and the ridgelines of the strip-shaped microstructures 120 are intermittently arranged irregularly (the strip-shaped microstructures 120 are along the first and second directions A1). A2 is set at intervals, so that the directivity of light can be effectively reduced, the light mixing effect is improved, and the light field angle of view is improved and hot spots are avoided. Furthermore, since the number of dot microstructures 110 is The light is gradually increased from the first side 104 toward the second side 105, so that the light rays exiting from the respective portions of the light-emitting surface 103 are substantially the same, so that the overall light-emitting effect is uniformized, and the portion close to the light-emitting source 20 is prevented from being brighter and farther away. Part of the darker situation.

Although the dot-like microstructures 110 in the foregoing embodiments are formed on the reflective surface 102 of the body 100 and protrude from the reflective surface 102, the dot-shaped microstructures 110 can be adjusted in shape and position according to user requirements. For example, as shown in FIG. 4, in another embodiment of the present invention, the dot-like microstructures 110 may be formed on the light-emitting surface 103, so that part of the light may directly pass through the dots after contacting the dot-shaped microstructures 110. The microstructures 110 exit the light guide 10. In some embodiments, the dot microstructures 110 can be formed on both the reflective surface 102 and the light exit surface 103. In some embodiments, the dot-like microstructures 110 may be recessed portions formed on the reflective surface 102 or the light-emitting surface 103, that is, recessed toward the inside of the light guide material 10 without protruding the reflective surface 102 or the light-emitting surface 103.

Referring to FIG. 5 , the display device of the present embodiment includes the backlight module B and a display panel D. The display panel D is located in front of the body 100 of the light guide 10 , and the light exit surface 103 faces the display panel D. The light exiting surface 103 leaves light having a sufficient brightness and a uniform distribution to be provided to the display panel D so that it can display an image normally. The aforementioned display panel D may include, for example, a glass substrate, a color filter, a liquid crystal, and a polarizing plate.

In summary, the present invention provides a light guide material. Since the number of arrangement of the dot-shaped microstructures is gradually increased away from the light source, the light-emitting effect can be made uniform, and the light is prevented from being emitted near the light source. Brighter situation. Secondly, by a point-like microstructure and a strip formed on the surface of the point-like microstructure The microstructure can destroy the total reflection of light in the light guide material, so that the light can exit the light guide material from the light exit surface. Moreover, the ridge lines of the strip-like microstructures are intermittently arranged irregularly, thereby improving the viewing angle of the light field, improving the light mixing property, and reducing the occurrence of hot spots.

Although the embodiments of the present invention and its advantages have been disclosed as above, it should be understood that those skilled in the art can make changes, substitutions and refinements without departing from the spirit and scope of the present invention. In addition, the scope of protection of the present invention is not limited to the processes, machines, manufacturing, material compositions, devices, methods, and steps in the specific embodiments described in the specification, and any one of ordinary skill in the art may disclose the present disclosure. It is understood that the processes, machines, manufactures, compositions, devices, methods, and steps that are presently or in the future can be used in accordance with the present invention as long as they can perform substantially the same function or achieve substantially the same results in the embodiments described herein. Therefore, the scope of protection of the present invention includes the above processes, machines, manufacturing, material compositions, devices, methods and steps. In addition, each patent application scope constitutes an individual embodiment, and the scope of protection of the present invention also includes the combination of each patent application scope and embodiment.

Although the present invention has been disclosed above in the foregoing several preferred embodiments, it is not intended to limit the present invention. Those who have ordinary knowledge in the technical field of the present invention can make some changes and refinements without departing from the spirit and scope of the present creation. Therefore, the scope of protection of this creation is subject to the definition of the scope of the patent application. In addition, each of the patent application scopes constitutes a separate embodiment, and the scope of the various patent applications and combinations of the embodiments are all within the scope of the present invention.

20‧‧‧Light source

100‧‧‧ body

102‧‧‧reflecting surface

104‧‧‧ first side

105‧‧‧ second side

106‧‧‧Parallel blocks

110‧‧‧ point microstructure

120‧‧‧ strip microstructure

A1‧‧‧ first direction

A2‧‧‧ second direction

Claims (10)

A light guide material comprises: a body; a plurality of dot-like microstructures separately formed on the body; and a plurality of strip-shaped microstructures formed on the surface of the dot-like microstructures, and each strip-shaped microstructure The ridgeline is an intermittently irregular arrangement. The light guide of claim 1, wherein at least a portion of the strip microstructures extend along a first direction. The light guide of claim 2, wherein at least another portion of the strip microstructures extends along a second direction, and the first direction is different from the second direction. The light guide material of claim 1, wherein the strip-shaped microstructures have different shapes. The light guide of claim 1, wherein the body has a first side and a second side, the first side being adjacent to a light source and opposite to the second side, wherein the dots are slightly The number of structures is gradually increased from a direction toward the first side toward a direction toward the second side. The light guide of claim 1, wherein the body has a light incident surface, a reflective surface, and a light exiting surface, the light incident surface is directed toward a light emitting source and is coupled to the reflective surface and the light emitting surface, and The dot-like microstructures are formed on the reflective surface. The light guide of claim 1, wherein the body has a light incident surface, a reflective surface, and a light exiting surface, the light incident surface is directed toward a light emitting source and is coupled to the reflective surface and the light emitting surface, and The dot microstructures are formed on The light surface. The light guide material according to claim 1, wherein the roughness mean roughness (Ra) is between 1 and 999 nm, and does not include an endpoint value. A light-guiding material according to any one of claims 1 to 8, and a light-emitting source, the light emitted by the light source enters the light guide material, and is The microstructure is reflected or refracted away from the light guide. A display device comprising a backlight module as described in claim 9 and a display panel, wherein the display panel is located in front of the body of the light guide material.