CN212781587U

CN212781587U - Light guide reflective film and backlight module

Info

Publication number: CN212781587U
Application number: CN202021066396.7U
Authority: CN
Inventors: 丁清华
Original assignee: Nanjing Juqingxin Material Co ltd
Current assignee: Nanjing Juqingxin Material Co ltd
Priority date: 2020-06-11
Filing date: 2020-06-11
Publication date: 2021-03-23
Anticipated expiration: 2030-06-11

Abstract

The utility model discloses a leaded light reflective membrane, include: the light-reflecting layer is arranged between the first structural layer and the second structural layer, the first structural layer comprises a substrate and a micro-structural layer, the micro-structural layer is arranged on the substrate, and the light-reflecting layer covers the whole surface of the first structural layer, which faces the second structural layer. The utility model also discloses an use backlight unit of leaded light reflectance coating. The utility model discloses traditional light guide plate and reflector are replaced to leaded light reflective film, make its preparation technology simpler, have integrateed the function of part blooming, make the whole thickness of backlight unit reduce.

Description

Light guide reflective film and backlight module

Technical Field

The utility model relates to a LCD field, specifically speaking relates to a leaded light reflective membrane and backlight unit.

Background

The liquid crystal display technology has the advantages of high display quality, low power consumption, large visual area, low cost and the like, and is widely applied to the fields of televisions, notebook computers, mobile phones, monitors and the like. The liquid crystal display panel is a non-self-luminous display panel, so a backlight module is required to provide a planar light source. The side-edge light-entering type backlight module adopts a light guide plate to form a plane light source. The light guide plate is used for reflecting a point light source or a linear light source entering from the light incident side of the light guide plate and then emitting the light source or the linear light source from the light emitting surface of the light guide plate to form a plane light source. The light guide plate of the traditional backlight module is produced in an injection molding mode, and a plurality of optical films are needed, so that the whole thickness of the backlight module is no longer advantageous under the current trend of light and thin.

SUMMERY OF THE UTILITY MODEL

To exist not enough among the prior art, the to-be-solved technical problem of the utility model is to provide a leaded light reflective membrane, reduced the thickness of leaded light plate, reduced the quantity of optical film among the backlight unit to the thickness that makes whole module reduces.

According to the utility model provides a leaded light reflective membrane, including first structural layer, second structural layer and reflector layer, the range upon range of the establishing on first structural layer of second structure, the reflector layer sets up between first structural layer and second structural layer, first structural layer includes basement and micro-structure layer, the micro-structure layer sets up in the basement, the reflector layer covers the whole surfaces of the orientation second structural layer on first structural layer.

Preferably, the microstructure layer has a plurality of microstructures, the light reflecting layer covers the surface of the microstructure layer, or the light reflecting layer covers the surfaces of the microstructure layer and the substrate, the thickness of the substrate is greater than 0 and less than or equal to 10 μm, and preferably, the thickness of the substrate is greater than 0 and less than or equal to 3 μm.

Preferably, the microstructure is a triangular prism, and the microstructure layers are triangular prisms arranged in sequence; the height of the triangular prism is gradually increased from one side to the other side, and the height change of the triangular prism conforms to a quadratic curve.

Preferably, the microstructures are short prisms, hemispheres, semi-ellipsoids, short prisms with wave motion, or a combination thereof, and the microstructures are randomly scattered, or arranged in an array, or arranged from one side to the other side in a sparse and dense manner, or arranged from one side to the other side in a small and large manner.

Preferably, the second structural layer is a prism layer.

Preferably, the light reflecting layer is a metal layer or a metal oxide layer, preferably, the light reflecting layer is a silver-plated or aluminum-plated layer, or contains TiO₂The white coating of (2).

According to the utility model provides a backlight module, include: the light source is arranged adjacent to the light inlet face.

According to the manufacturing method of the light guide reflective film provided by the utility model, firstly, a microstructure layer is formed on a substrate; secondly, forming a reflective layer on the surface of the microstructure layer or on the surface of the substrate and the microstructure layer; finally, forming a second structural layer on the surface of the reflecting layer; wherein, a roll-to-roll production process is adopted in the process of forming the first structural layer and the second structural layer.

The utility model provides a leaded light reflective membrane and backlight unit has replaced traditional light guide plate and reflector panel, makes the preparation of leaded light reflective membrane easier, and leaded light reflective membrane has the use that the prism structure can reduce traditional blooming simultaneously concurrently, lets the thickness of whole module thinner.

Drawings

FIG. 1 is a schematic view of the structure of the light-guiding reflective film of the present invention;

FIG. 2 is a schematic view of a first structural layer of the light directing retroreflective sheeting of FIG. 1;

FIG. 3 is a schematic view of a light-guiding reflective film according to another embodiment of the present invention;

fig. 4 is a schematic structural view of a first structural layer of a light-guiding reflective film according to another embodiment of the present invention;

fig. 5 is a schematic structural view of a first structural layer of a light-guiding reflective film according to another embodiment of the present invention;

FIG. 6 is a schematic view of a backlight module according to the present invention;

wherein:

10 a backlight module; 11 a light source; 13 light guiding and reflecting film; 131 a first structural layer; 132 a light-reflecting layer; 133 a second structural layer; 1311 a substrate; 1312 a microstructure layer; l curve

Detailed Description

The foregoing and other technical and scientific aspects, features and advantages of the present invention will be apparent from the following detailed description of a preferred embodiment, which is to be read in connection with the accompanying drawings. Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are simply directions with reference to the drawings. Accordingly, the directional terminology is used for purposes of illustration and is in no way limiting. The invention will be described in further detail with reference to the accompanying drawings:

as shown in fig. 1-2, is a schematic structural diagram of the light guiding and reflecting film of the present invention. As shown in fig. 1-2, the light guiding and reflecting film 13 includes a first structural layer 131, a reflecting layer 132 and a second structural layer 133, which are sequentially disposed, in this embodiment, the first structural layer 131 includes a substrate 1311 and a micro-structural layer 1312, and the micro-structural layer 1312 includes a plurality of strip-shaped triangular prisms, and the strip-shaped triangular prisms are sequentially arranged along a direction perpendicular to an extending direction of the triangular prisms. The light reflecting layer 132 covers the triangular prism of the microstructure layer 1312, and covers both side surfaces of the triangular prism. For better reflection, the light reflecting layer 132 may be a metal plating layer or a white coating layer containing TiO 2. The second structure layer 133 is directly formed on the reflective layer 132, and a prism structure is disposed on the surface of the second structure layer, which is away from the first structure layer 131, and the prism structure has a light-gathering effect, and can replace a brightness enhancement film, thereby reducing the usage amount of an optical film in the backlight module, and reducing the thickness. The vertex angle of the prism structure is set to be 90 degrees, the height of the prism is 10-25 mu m, and the thickness of the second structure layer excluding the prism structure part is 10-50 mu m. The microstructure portion of the first structural layer 131 and the second structural layer 133 are both made of light-cured resin, and may be acrylic resin.

As shown in fig. 3, for the utility model discloses light guide reflective membrane structure of another embodiment, similar in fig. 1, the same reference numeral has represented the same structure module, with the design on the micro-structure layer of light guide reflective membrane 13 difference lies in first structural layer 131 in fig. 1, the micro-structure of micro-structure layer still is strip triangular prism in this embodiment, the difference lies in the height of the triangular prism of this embodiment and increases in proper order to the opposite side that the triangular prism was arranged from one side of triangular prism, and the height value distribution of triangular prism is on secondary curve L, specifically is the secondary parabolic curve.

As shown in fig. 4-5, a design of the first structural layer of the light guiding reflective film according to another embodiment of the present invention is different from the design of the first structural layer of the light guiding reflective film shown in fig. 2 in the design of the microstructure in the microstructure layer 1312, and the microstructure is substantially a partial ellipsoid structure in the embodiment shown in fig. 4-5; unlike the previous embodiment, the light reflecting layer 132 is disposed not only on the surfaces of the microstructures, but also on the exposed substrate between the microstructures, such that the light reflecting layer 132 covers all the upper surfaces of the first structural layer. While the microstructures in fig. 4 are arranged in an array of the same partial ellipsoidal structures, the partial ellipsoidal structures as the microstructures in fig. 5 have a gradual change in size, specifically, gradually increase from one side to the opposite side. In other embodiments, the microstructures can also be designed as short prism structures, or hemispherical structures, or undulating short prisms, or a combination of different structures; in addition, the arrangement of the microstructures may also be designed as random distribution, or array arrangement, which is arranged from one side to the other side in a sparse and dense manner, or from one side to the other side in a small and large manner, or a combination arrangement with self-consistent logic (e.g., random distribution and array arrangement are not self-consistent logic).

The light guide reflective film in the embodiment is different from the traditional light guide plate in the manufacturing process; coating a substrate with light-cured resin, impressing a microstructure layer on the light-cured resin of the substrate by using a forming machine, and then curing to form a first structural layer; then coating the first structure layer with a metal layer (such as silver or aluminum) or TiO₂To form a light reflecting layer; and coating the light-cured resin on the first structural layer with the reflective layer as a substrate, stamping a microstructure on the light-cured resin of the substrate by a forming machine, and curing to form a second structural layer, so that the light-guiding reflective film is manufactured. Wherein the light-curable resin may be an acrylic resin; in addition, the forming processes of the first structure layer 131 and the second structure layer 133 can be realized by Roll-to-Roll, which replaces the traditional light guide plate injection forming process, and the efficiency, yield and cost are optimized.

Fig. 6 is the utility model discloses a backlight unit structural diagram, as shown in fig. 6, backlight unit 10 includes light source 11 and leaded light reflective membrane 13, and the one side that first structural layer 131 was kept away from to leaded light reflective membrane 13's second structural layer 133 is the play plain noodles, and first structural layer 131 keeps away from a plain noodles one side and is the bottom surface, and the one side that connects play plain noodles and bottom surface and reflective layer 132 orientation is the income plain noodles, and the neighbouring income plain noodles of light source 11 sets up, the utility model discloses a leaded light reflective membrane has changed the light guide plate structure and has cancelled the setting of reflector panel, makes the whole thickness of backlight unit further reduce. The light-guiding reflective film shown in the figure is the same as the light-guiding reflective film shown in fig. 1, and in other embodiments, the light-guiding reflective film may be the light-guiding reflective film described in any of the foregoing embodiments, and is not described in detail herein.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention, i.e. all simple equivalent changes and modifications made in the claims and the description of the present invention are still covered by the present invention. Moreover, it is not necessary for any embodiment or claim of the invention to address all of the objects, advantages, or features disclosed herein. In addition, the abstract and the utility model name are only used for assisting the retrieval of patent documents and are not used for limiting the scope of the invention. Furthermore, the terms "first", "second", and the like in the description or the claims are used only for naming elements (elements) or distinguishing different embodiments or ranges, and are not used for limiting the upper limit or the lower limit on the number of elements.

Claims

1. A light directing retroreflective sheeting comprising: the light-reflecting structure comprises a first structural layer, a second structural layer and a light-reflecting layer, wherein the second structure is arranged on the first structural layer in a stacking mode, and the light-reflecting layer is arranged between the first structural layer and the second structural layer.

2. A light directing and reflecting film according to claim 1, wherein the microstructure layer has a plurality of microstructures, the light reflecting layer covers the surface of the microstructure layer, or the light reflecting layer covers the surfaces of the microstructure layer and the substrate, and the thickness of the substrate is greater than 0 and less than or equal to 10 μm.

3. A light directing and reflecting film according to claim 2, wherein the substrate thickness is greater than 0 and less than or equal to 3 μm.

4. A light directing and reflecting film as recited in claim 2, wherein: the microstructure is a triangular prism, and the microstructure layer is a triangular prism which is arranged in sequence.

5. A light directing and reflecting film according to claim 4, wherein: the height of the triangular prism is gradually increased from one side to the other side.

6. A light directing and reflecting film according to claim 5, wherein: the height change of the triangular prism of the microstructure layer conforms to a quadratic curve.

7. A light directing and reflecting film as recited in claim 2, wherein: the microstructures are short prisms, hemispheres, semi-ellipsoids, undulating short prisms, or combinations thereof.

8. A light directing and reflecting film according to claim 7, wherein: the microstructures are randomly scattered or arranged in an array, or arranged from one side to the other side in a sparse and dense mode, or arranged from one side to the other side in a small and large size mode.

9. A light directing and reflecting film as recited in claim 1, wherein: the second structural layer is a prism layer.

10. A light directing and reflecting film as recited in claim 1, wherein: the reflecting layer is a metal layer or a metal oxide layer.

11. A light directing and reflecting film according to claim 10, wherein: the metal layer is a silver-plated or aluminum-plated layer, and the metal oxide layer contains TiO₂The white coating of (2).

12. A backlight module includes: a light source and the light directing film of any of claims 1-11, wherein the first structural layer is on the bottom surface of the light directing film, the second structural layer is on the light exit surface of the light directing film, the light entry surface connects the bottom surface and the light exit surface, and the light source is disposed adjacent to the light entry surface.