TW202026707A - Light guide film, combined structure of light guide film and release paper, backlight module, and display device of which the light guide film comprises a main body including a first microstructure zone and a blank zone and at least a second microstructure zone - Google Patents

Abstract

The present invention relates to a light guide film, a combined structure of a light guide film and a release paper, a backlight module, and a display device. The backlight module comprises the light guide film and a light source arranged adjacent to one side of the light guide film. The display device comprises the backlight module and a display panel disposed in front of the backlight module. The light guide film comprises a main body including a first microstructure zone and a blank zone, and at least a second microstructure zone. The second microstructure zone is disposed in the blank zone of the main body. When the release paper is attached to the light guide film, the second microstructure zone reduces a contact area between the release paper and the light guide film to thereby reduce the adhesion between the release paper and the light guide film, so that an operator may peel off the release paper with bare hands, without the need of applying an operation of adhering with an adhesive tape, so as to effectively enhance operation convenience and operation efficiency and also to avoid the risk of having adhesive remaining on the light guide film.

Description

Light guide film, combined structure of light guide film and release paper, backlight module and display device

This creation is about a kind of light guide element, especially light guide film applied to backlight module and display device and its application.

The current display device mainly uses a backlight module to provide a backlight source to the display panel, so that the display device can display images for users to view, and the backlight module is a light guide film. A light source is arranged adjacent to the light surface, and the optical microstructure on the light guide film can reflect the light input by the light source, so that the light is emitted from the light exit surface of the light guide film.

Wherein, the light guide film of the backlight module is provided with a microstructure area and a blank area surrounding the dotted area, and the optical microstructure is coated on the microstructure area of the light guide film. In order to prevent the optical microstructure on the light guide film from being damaged during the transportation to the assembly area after the light guide film is manufactured, a release paper is attached to the light guide film until the operator wants to assemble it When the backlight module is used, the operator must first peel off the release paper adhered to the light guide film before setting up the light guide film.

Since the blank area distributed on the periphery of the microstructure area of the light guide film is a flat surface, when the release paper is attached to the light guide film, the part of the blank area attached to the light guide film is separated The mold paper is more difficult to peel off. Therefore, when peeling the release paper, the workers now use an adhesive tape to attach the release paper first, and pull the tape to remove the release paper from the light guide film. However, as mentioned above, in the operation of peeling the release paper, the operator must first take a piece of tape before peeling off the release paper. Not only is there inconvenience in the operation, but also after the release paper is peeled off, the light guide film is easy The light guide film has a problem of residual glue.

The main purpose of this creation is to provide a light guide film, a combination structure of light guide film and release paper, a backlight module and a display device, hoping to improve the inconvenience and ease of peeling off the current light guide film. There is a problem of residual glue.

In order to achieve the purpose of the foregoing disclosure, the light guide film of this creation includes: a body, which includes a light incident surface, a light incident surface and an optical surface, the light incident surface and the light incident surface are respectively located on the optical surface On two opposite sides, the optical surface includes a first microstructure area and a blank area, the blank area surrounds the periphery of the first microstructure area; and at least one second microstructure area, which is disposed on the optical surface Blank area.

Wherein, the second microstructure zone is located adjacent to the corner of the body.

Wherein, the second microstructure area is adjacent to the light-incident surface of the body.

Wherein, the second microstructure area is provided on the edge of the body.

Wherein, the second microstructure protrudes from the optical surface of the main body.

Wherein, a blank space is formed between the second microstructure area and the first microstructure area.

Wherein, the second microstructure area is connected to the first microstructure area.

Wherein, the body has a plurality of side edges and a plurality of arc-shaped corners, each arc-shaped corner connects the adjacent side edges, and the second microstructure area extends from the arc-shaped corner toward the side edge .

Wherein, the optical surface of the main body is a reflective surface.

In addition, in order to achieve the aforementioned purpose, the combined structure of the light guide film and release paper provided by this creation includes: the light guide film as described above; and a release paper attached to the optical surface of the light guide film, and Part of the outer edge of the release paper is located on the second microstructure area of the light guide film.

In addition, the present invention also provides a backlight module, which includes: the light guide film as described above; and a light source, which is adjacent to the light incident surface of the light guide film.

Furthermore, the present invention provides a display device, which includes: a backlight module as described above; and a display panel, which is located in front of the light guide film of the backlight module.

The creative light guide film is mainly by providing the second microstructure area in the blank area of the optical surface. When the release paper is attached to the light guide film, the second microstructure area is The microstructure can reduce the contact area with the release paper, thereby reducing the viscosity between the release paper and the light guide film, so that the operator can directly peel off the release paper with bare hands, and It does not need to be adhered through tape, which can effectively improve the convenience and efficiency of work, and at the same time can avoid the risk of residual glue on the light guide film.

Please refer to FIGS. 1 to 3, which are several preferred embodiments of the creative light guide film, which includes a main body 10 and at least one second microstructure area 20.

The body 10 includes a light incident surface 11, a light incident surface 12, and an optical surface 13. The light incident surface 11 and the light incident surface 12 are respectively located on two opposite sides of the optical surface 13, and the optical surface 13 includes A first microstructure area 14 and a blank area 15, and the blank area 15 surrounds the periphery of the first microstructure area 14. Wherein, the optical surface 13 may be a reflective surface or a light emitting surface. In the preferred embodiment of this invention, the optical surface 13 is a reflective surface.

In more detail, the blank area 15 may be a closed surrounding state, such as O-shaped, or a non-closed surrounding state, such as C-shaped or U-shaped. Wherein, the first microstructure area 14 may be polygonal. Therefore, the blank area 15 is located on the outside of the first microstructure area 14, and is bounded by the edges of the first microstructure area 14 and the edge of the body 10. For example, when the first microstructure area 14 is quadrilateral, the blank area 15 may be located at the four edges of the first microstructure area 14, or the blank area 15 may be located at the first microstructure area. More than two edges of the structure area 14. In addition, the first microstructure area 14 can also be circular. In this case, the blank area 15 is annular and is located between the outer edge of the first microstructure area 14 and the side edge 17 of the body 10.

At least one second microstructure area 20 is provided in the blank area 15 of the optical surface 13, wherein the second microstructure area 20 is located adjacent to the corner of the body 10, and the corner can be selected Located on the light-incident surface 11 or the light-reflecting surface 12 close to the main body 10; as shown in FIG. 1, in the first preferred embodiment, the second microstructure area 20 is adjacent to the inverted-in surface of the main body 10 The smooth surface 12 can ensure that the light entering the creative light guide film will not be interfered with by the dots of the second microstructure area 20. Furthermore, the second microstructure 20 protrudes from the optical surface 13 of the main body 10.

As shown in FIG. 1, in the first preferred embodiment of the creative light guide film, the second microstructure area 20 is connected to the first microstructure area 14.

As shown in FIG. 2, in the second preferred embodiment of the creative light guide film, a blank space is formed between the second microstructure area 20 and the first microstructure area 14; In the first or second embodiment of the creative light guide film, in the microstructure manufacturing process of the creative light guide film, when the first microstructure area 14 is formed with bumps, the second microstructure area 20 is also formed with bumps. It will not increase the process or difficulty of the manufacturing process, but also can effectively improve the efficiency of film stripping.

Furthermore, as shown in FIG. 3, in the third preferred embodiment of the creative light guide film, the second microstructure area 20 is provided on the edge of the main body 10, as shown in FIG. The body 10 has a plurality of side edges 17 and a plurality of arc-shaped corners 16, each arc-shaped corner 16 is connected to the adjacent side edges 17, and the second microstructure area 20 is formed by the arc-shaped corners 16 Extending toward the side edge 17; wherein, the third preferred embodiment of the light guide film of the present invention is manufactured by forming the second microstructure area 20 at the edge of the body 10, and forming a The arc-shaped area, and then use a cutter to cut the corners of the body 10 so that the body 10 forms the arc-shaped corner 16, so that the second microstructure area 20 can be located at the edge of the body 10 Place.

Please refer to FIG. 4, which is a preferred embodiment of the combined structure of the creative light guide film and release paper, which includes the light guide film and a release paper 30 as described above.

The release paper 30 is attached to the optical surface 13 of the light guide film, and a part of the outer edge of the release paper 30 is located on the second microstructure area 20 of the light guide film.

Please also refer to FIG. 5, which is a preferred embodiment of the creative backlight module, which includes a light guide film as described above and a light source 40, wherein the light source 40 is adjacent to the incident light of the light guide film Face 11.

Please also refer to FIG. 6, which is a preferred embodiment of the creative display device, which includes a backlight module as described above and a display panel 50, wherein the display panel 50 is located on the light guide film of the backlight module The front.

Please refer to FIG. 3, taking the third preferred embodiment of the creative light guide film as an example, when the release paper 30 is attached to the light guide film, the microstructures on the second microstructure area 20 The structure can reduce the contact area with the release paper 30 and reduce the viscosity between the release paper 30 and the light guide film. Therefore, the operator can directly peel off the release paper 30 with bare hands. There is no need to peel off the release paper 30 through the adhesive tape, in addition to effectively improving the working efficiency of the release paper 30 peeling operation, it can also avoid the risk of residual glue on the light guide film.

In addition, as shown in FIG. 3, the second microstructure area 20 is provided on the edge of the main body 10, which can provide the operator to directly peel the release paper 30 from the edge of the light guide film, which can further improve the release paper. 30 Convenience and efficiency of peeling operation. Furthermore, the arc-shaped edge of the main body 10 is more helpful to reduce the difficulty of the operator in the stripping operation.

In summary, the creative light guide film is mainly provided with the second microstructure area 20 in the blank area 15 of the optical surface 13, reducing the time when the release paper 30 is attached to the light guide film. The contact area of the release paper 30 and the light guide film is further reduced, so that the operator can peel off the release paper 30 directly with bare hands, without the need for adhesive tape, which is effective Improve work convenience and work efficiency, while avoiding the risk of residual colloids on the light guide film.

10: body 11: Glossy surface 12: Reverse into the glossy surface 13: Optical surface 14: The first microstructure area 15: blank area 16: curved corners 17: Side edge 20: The second microstructure area 30: Release paper 40: light source 50: display panel

Figure 1: A schematic diagram of the first preferred embodiment of the creative light guide film. Figure 2: A schematic diagram of the second preferred embodiment of the creative light guide film. Figure 3: A schematic diagram of the third preferred embodiment of the creative light guide film. Figure 4: The three-dimensional partial schematic diagram of the combined structure of the creative light guide film and release paper. Figure 5: A schematic top view of the creative backlight module. Figure 6: A schematic top view of the creative display device.

10: body

11: Glossy surface

12: Reverse into the glossy surface

13: Optical surface

14: The first microstructure area

15: blank area

16: curved corners

17: Side edge

20: The second microstructure area

Claims (12)

A light guide film, comprising: a body, comprising a light incident surface, a light incident surface, and an optical surface, the light incident surface and the light incident surface are respectively located on two opposite sides of the optical surface, the optical The surface includes a first microstructure area and a blank area, the blank area surrounds the periphery of the first microstructure area; and at least one second microstructure area, which is disposed in the blank area of the optical surface. The light guide film according to claim 1, wherein the second microstructure zone is located adjacent to the corner of the body. The light guide film according to claim 2, wherein the second microstructure area is adjacent to the light-reflecting surface of the body. The light guide film according to any one of claims 1 to 3, wherein the second microstructure region is provided on the edge of the body. The light guide film according to any one of claims 1 to 3, wherein the second microstructure protrudes from the optical surface of the body. The light guide film according to any one of claims 1 to 3, wherein a blank space is formed between the second microstructure area and the first microstructure area. The light guide film according to any one of claims 1 to 3, wherein the second microstructure area is connected to the first microstructure area. The light guide film according to any one of claims 1 to 3, wherein the body has a plurality of side edges and a plurality of arc-shaped corners, and each arc-shaped corner connects the adjacent side edges, and the second The microstructure area extends from the arc-shaped corner toward the side edge. The light guide film according to any one of claims 1 to 3, wherein the optical surface of the main body is a reflective surface. A combined structure of a light guide film and a release paper, comprising: a light guide film according to any one of claims 1 to 9; and a release paper attached to the optical surface of the light guide film, And part of the outer edge of the release paper is located on the second microstructure area of the light guide film. A backlight module, comprising: a light guide film according to any one of claims 1 to 9; a light source, which is adjacent to the light incident surface of the light guide film. A display device comprising: a backlight module according to claim 11; and a display panel, which is located in front of the light guide film of the backlight module.

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