Light guide film, combined structure including light guide film, backlight module and display device

Abstract

The present invention relates to a light guide film, a combined structure including the light guide film, a backlight module, and a display device. The light guide film includes a body having a first microstructure region and a blank region, and at least one second microstructure region. The second microstructure region is disposed in the blank region of the body. When the release paper is attached to the light guide film, the second microstructure region can reduce the contact area between the release paper and the light guide film, thereby reducing the adhesion between the release paper and the light guide film, so that an operator can peel the release paper by hand without using tape adhesion. Therefore, the operation convenience and operation efficiency can be effectively improved, and at the same time, the risk of residual colloid on the light guide film can be avoided.

Description

Technical Field

[0001] The present invention relates to a light guiding element, and particularly to a light guiding film and its applications in a backlight module and a display device. Background Art

[0002] Current display devices mainly use a backlight module to provide a backlight source for a display panel, so that the display device can display an image for users to view. The backlight module is adjacent to a light source at the light incident surface of the light guiding film, and the optical microstructures on the light guiding film can reflect the light incident from the light source, so that the light exits from the light exit surface of the light guiding film.

[0003] A microstructure area and a blank area surrounding the microstructure area are provided on the light guiding film of the backlight module, and the optical microstructures are coated in the microstructure area of the light guiding film. In order to prevent the optical microstructures on the light guiding film from being damaged during the process of transporting the light guiding film from the manufacturing site to the assembly area after manufacturing, a release paper is attached to the light guiding film. When an operator wants to assemble the backlight module, the operator must first peel off the release paper adhered to the light guiding film before performing the setting operation of the light guiding film.

[0004] Since the blank area distributed on the periphery of the microstructure area of the light guiding film is a flat surface, when the release paper is attached to the light guiding film, the release paper attached to the blank area of the light guiding film is difficult to peel off. Therefore, currently, when an operator peels off the release paper, the operator will first attach a tape to the release paper, and then pull the tape to make the release paper separate from the light guiding film. However, as described above, in the operation of peeling off the release paper, the operator must first take a section of tape to peel off the release paper, which not only causes inconvenience in the peeling operation, but also easily causes the problem of residual colloid on the light guiding film after the release paper is peeled off. Summary of the Invention

[0005] The main object of the present invention is to provide a light guiding film, a combined structure of the light guiding film and a release paper, a backlight module, and a display device, thereby improving the problems that the current light guiding film is inconvenient in the peeling operation of the release paper and is prone to residual glue.

[0006] To achieve the foregoing object, the light guiding film of the present invention includes: a body, which includes a light incident surface, a light anti-incident surface, and an optical surface, the light incident surface and the light anti-incident surface are respectively located on opposite sides of the optical surface, 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 in the blank area of the optical surface.

[0007] According to an embodiment of the present invention, the second microstructure area is located at a position adjacent to a corner of the body.

[0008] According to an embodiment of the present invention, the second microstructure area is adjacent to the light anti-incident surface of the body.

[0009] According to an embodiment of the present invention, the second microstructure region is provided at the edge of the body.

[0010] According to an embodiment of the present invention, the second microstructure protrudes from the optical surface of the body.

[0011] According to an embodiment of the present invention, a blank interval is formed between the second microstructure region and the first microstructure region.

[0012] According to an embodiment of the present invention, the second microstructure region is connected to the first microstructure region.

[0013] According to an embodiment of the present invention, the body has a plurality of side edges and a plurality of arc-shaped corners, each arc-shaped corner connecting adjacent side edges, and the second microstructure region extends from the arc-shaped corner towards the side edge.

[0014] According to an embodiment of the present invention, the optical surface of the body is a reflective surface.

[0015] In addition, in order to achieve the foregoing object, the combined structure of the light guide film and the release paper provided by the present invention includes: the light guide film as described above; and a release paper, which is attached to the optical surface of the light guide film, and a part of the outer edge of the release paper is located on the second microstructure region of the light guide film.

[0016] Furthermore, 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.

[0017] Moreover, the present invention also provides a display device, which includes: the backlight module as described above; and a display panel, which is located in front of the light guide film of the backlight module.

[0018] In the light guide film of the present invention, a second microstructure region is provided in the blank area of its optical surface. Thus, when the release paper is attached to the light guide film, the microstructures on the second microstructure region can reduce the contact area between the light guide film and the release paper, thereby reducing the adhesion between the release paper and the light guide film. As a result, the operator can directly peel off the release paper by hand without using tape adhesion. Therefore, it can effectively improve the operation convenience and operation efficiency, and at the same time, it can also avoid the risk of residual colloid on the light guide film. Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the first preferred embodiment of the light guide film of the present invention.

[0020] Figure 2 It is a schematic diagram of the second preferred embodiment of the light guide film of the present invention.

[0021] Figure 3 It is a schematic diagram of the third preferred embodiment of the light guide film of the present invention.

[0022] Figure 4 It is a three-dimensional partial schematic diagram of the combined structure of the light guide film and the release paper of the present invention.

[0023] Figure 5 It is a top view schematic diagram of the backlight module of the present invention.

[0024] Figure 6 It is a top view schematic diagram of the display device of the present invention. Detailed embodiments

[0025] Please refer to Figures 1 to 3 , which are several preferred embodiments of the light guide film of the present invention, and include a body 10 and at least one second microstructure region 20.

[0026] The body 10 includes a light incident surface 11, a light anti-incident surface 12, and an optical surface 13. The light incident surface 11 and the light anti-incident surface 12 are respectively located on opposite sides of the optical surface 13. The optical surface 13 includes a first microstructure region 14 and a blank region 15. The blank region 15 surrounds the periphery of the first microstructure region 14. Among them, the optical surface 13 can be a reflective surface or a light-emitting surface. In a preferred embodiment of the present invention, the optical surface 13 is a reflective surface.

[0027] More specifically, the blank region 15 can be in a closed surrounding state, such as an O shape, or can be in a non-closed surrounding state, such as a C shape or a U shape. The first microstructure region 14 can be a polygon. Therefore, the blank region 15 is located outside the first microstructure region 14 and is bounded between the respective edges of the first microstructure region 14 and the edge of the body 10. For example, when the first microstructure region 14 is a quadrilateral, the blank region 15 can be located outside the four edges of the first microstructure region 14, or the blank region 15 can also be located outside two or more edges of the first microstructure region 14. In addition, the first microstructure region 14 can also be circular. At this time, the blank region 15 is in a ring shape and is located between the edge of the first microstructure region 14 and the side edge 17 of the body 10.

[0028] The second microstructure region 20 is disposed in the blank region 15 of the optical surface 13, and the second microstructure region 20 is located at a position adjacent to the corner of the body 10, and this position can be selected to be close to the light incident surface 11 or the light anti-incident surface 12 of the body 10. As Figure 1 shown, in the first preferred embodiment, the second microstructure region 20 is adjacent to the light anti-incident surface 12 of the body 10, thereby ensuring that the light path of the light entering the light guide film of the present invention will not be interfered by the dots of the second microstructure region 20. Furthermore, the second microstructure 20 protrudes from the optical surface 13 of the body 10.

[0029] As Figure 1 shown, in the first preferred embodiment of the light guide film of the present invention, the second microstructure region 20 is connected to the first microstructure region 14.

[0030] As Figure 2 shown, in the second preferred embodiment of the light guide film of the present invention, a blank interval is formed between the second microstructure region 20 and the first microstructure region 14. Whether it is the first embodiment or the second embodiment of the light guide film of the present invention, during the manufacturing process of the microstructure of the light guide film of the present invention, while forming bumps in the first microstructure region 14, bumps are also formed in the second microstructure region 20. This way, it will neither increase the process steps or difficulty, nor can effectively improve the film peeling efficiency.

[0031] Furthermore, as Figure 3 shown, in the third preferred embodiment of the light guide film of the present invention, the second microstructure region 20 is disposed at the edge of the body 10. As Figure 3 shown, the body 10 has a plurality of side edges 17 and a plurality of arc-shaped corners 16, and each arc-shaped corner 16 connects adjacent side edges 17. The second microstructure region 20 extends from the arc-shaped corner 16 towards the side edge 17. When manufacturing the light guide film of the third preferred embodiment of the present invention, the second microstructure region 20 is formed at the edge of the body 10 and is formed into an arc-shaped region, and then the corner of the body 10 is cut with a tool to form an arc-shaped corner 16 on the body 10, so that the second microstructure region 20 is located at the end edge of the body 10.

[0032] Please refer to Figure 4 , which is a preferred embodiment of the combined structure of the light guide film and the release paper of the present invention, and includes the light guide film and the release paper 30 as described above.

[0033] 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 region 20 of the light guide film.

[0034] Please also refer to Figure 5 , which is a preferred embodiment of the backlight module of the present invention, and includes the light guide film and the light source 40 as described above, wherein the light source 40 is adjacent to the light incident surface 11 of the light guide film.

[0035] Please also refer to Figure 6 , which is a preferred embodiment of the display device of the present invention, and includes the backlight module and the display panel 50 as described above, wherein the display panel 50 is located in front of the light guide film of the backlight module.

[0036] Please refer to Figure 3, taking the third preferred embodiment of the light guide film of the present invention as an example, when the release paper 30 is attached to the light guide film, the microstructures on the second microstructure region 20 can reduce the contact area between the light guide film and the release paper 30, and reduce the adhesion between the release paper 30 and the light guide film. Therefore, the operator can directly peel off the release paper 30 by hand without using tape to peel off the release paper 30. In this way, not only can the operation efficiency of peeling off the release paper 30 be effectively improved, but also the risk of residual colloid on the light guide film can be avoided.

[0037] In addition, as Figure 3 shown, the second microstructure region 20 is provided at the edge of the body 10, so that the operator can directly peel off the release paper 30 from the edge of the light guide film, thereby further improving the convenience and operation efficiency of the release paper 30 peeling operation. Furthermore, by means of the arc-shaped edge of the body 10, it is more helpful to reduce the difficulty of the operator's peeling operation.

[0038] In summary, the light guide film of the present invention can reduce the contact area when the release paper 30 is attached to the light guide film by means of the second microstructure region 20 provided in the blank area 15 of the optical surface 13, thereby reducing the adhesion between the release paper 30 and the light guide film, so that the operator can directly peel off the release paper 30 by hand without using tape adhesion. Therefore, it can effectively improve the operation convenience and operation efficiency, and at the same time can also avoid the risk of residual colloid on the light guide film.

[0039]

List of Reference Numerals

[0040] 10 Body 11 Light incident surface

[0041] 12 Anti-light incident surface 13 Optical surface

[0042] 14 First microstructure region 15 Blank area

[0043] 16 Arc-shaped corner 17 Side edge

[0044] 20 Second microstructure region 30 Release paper

[0045] 40 Light source 50 Display panel

Claims

1. A light guide film, characterized in that, Comprising: A body, which includes a light-incident surface, a light-anti-incident surface, and an optical surface. The light-incident surface and the light-anti-incident surface are respectively located on opposite sides of the optical surface. The optical surface includes a first microstructure region and a blank region. The blank region surrounds the periphery of the first microstructure region and is located between the edge of the first microstructure region and the side edge of the body; and At least one second microstructure region, which is disposed in the blank region of the optical surface, and the second microstructure region is located at a position adjacent to the corner of the body.

2. The light guide film according to claim 1, wherein The second microstructure region is adjacent to the light-anti-incident surface of the body.

3. The light guide film according to claim 1, wherein, The second microstructure protrudes from the optical surface of the body.

4. The light guide film according to claim 1, wherein, A blank interval is formed between the second microstructure region and the first microstructure region.

5. The light guide film according to claim 1, characterized in that, The second microstructure region is connected to the first microstructure region.

6. The light guide film according to claim 1, wherein The optical surface of the body is a reflective surface.

7. A combined structure of a light guide film and a release paper, characterized in that, Comprising: The light guide film according to any one of claims 1 to 6; and A release paper, which is attached to the optical surface of the light guide film, and a part of the outer edge of the release paper is located on the second microstructure region of the light guide film.

8. A backlight module, characterized in that, Comprising: The light guide film according to any one of claims 1 to 6; A light source, which is adjacent to the light-incident surface of the light guide film.

9. A display device, characterized in that, Comprising: The backlight module according to claim 8; and A display panel, which is located in front of the light guide film of the backlight module.

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