TWI688800B - Light guide film, combined structure of light guide film and release paper, backlight module and display device - Google Patents

Abstract

This creation is 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 includes the light guide film and a light source adjacent to the light guide film side, and the display device includes a backlight The module and the display panel provided in front of the backlight module. The light guide film includes a body having a first microstructure area and a blank area and at least a second microstructure area. The second microstructure area is disposed in the blank area of the body. When the release paper is attached to the light guide film, the second microstructure area can reduce the contact area between the release paper and the light guide film, thereby reducing the viscosity between the release paper and the light guide film, so that the operator can use Free-hand peeling off the release paper without the need for adhesive tape, can effectively improve the convenience and efficiency of the operation, while also avoiding the risk of residual colloid 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 relates to a light guide element, especially a light guide film applied to a backlight module and a display device and its application.

Today's display devices mainly use a backlight module to provide backlight to the display panel, thereby enabling the display device to display a picture for the user 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 entered by the light source, so that the light exits 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 layout area, and the optical microstructure is coated on the microstructure area of the light guide film. In order to avoid damage to the optical microstructure on the light guide film after manufacturing and transport to the assembly area, a release paper will be attached to the light guide film until the operator wants to assemble In the case of the backlight module, the operator must first peel off the release paper adhered to the light guide film before setting the light guide film.

Since the blank area distributed around 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 release paper will be more difficult to peel, so now when the workers peel off the release paper, they will first use a tape to attach to the release paper, and pull the tape to make the release paper detach from the light guide film, However, as mentioned above, in the operation of peeling off the release paper, the operator must first take a piece of tape to peel off the release paper, which is not only inconvenient in the operation, but also after peeling off the release paper, 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 combined structure of the light guide film and the release paper, a backlight module and a display device, in order to improve the inconvenience and ease of the current light guide film in peeling off the release paper There is a problem of residual glue.

In order to achieve the purpose of pre-disclosure, the light guide film of this creation includes: a body including a light incident surface, a light incident surface and an optical surface, the light incident surface and the light incident surface are located on the optical surface respectively Opposite to the two 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 a second microstructure area, which is disposed on the optical surface Blank area.

Wherein, the second microstructure area is located near the corner of the body.

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

Wherein, the second microstructure area is located at the edge of the body.

Wherein, the second microstructure protrudes out of the optical surface of the 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 is connected to the adjacent side edge, and the second microstructure area extends from the arc-shaped corner toward the side edge .

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

In order to achieve the purpose of pre-disclosure, the combination structure of the light guide film and the release paper provided by this creation 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 the 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: a 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 further 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 provided by the second microstructure area in the blank area of its optical surface. When the release paper is attached to the light guide film, the second microstructure area 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 freehand, and The method without adhesive tape can effectively improve the operation convenience and operation efficiency, and at the same time can avoid the risk of residual light guide film glue.

Please refer to FIG. 1 to FIG. 3, which are several preferred embodiments for creating a light guide film, which includes a body 10 and at least one second microstructure region 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 opposite sides of the optical surface 13. The optical surface 13 includes A first microstructure area 14 and a blank area 15 are formed. The blank area 15 surrounds the periphery of the first microstructure area 14. The optical surface 13 may be a reflective surface or a light-emitting surface. In the preferred embodiment of the present invention, the optical surface 13 is a reflective surface.

More specifically, the blank area 15 may be a closed-type surrounding state, such as an O-type, or a non-closed type surrounding state, such as a C-type or U-type. The first microstructure area 14 may be polygonal. Therefore, the blank area 15 is located outside the first microstructure area 14 and bounds between each edge of the first microstructure area 14 and the edge of the body 10 For example, when the first microstructure area 14 is a 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 More than two edges of the structure area 14. In addition, the first microstructure area 14 may also be circular. At this time, the blank area 15 is ring-shaped and 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, which is disposed in the blank area 15 of the optical surface 13, wherein the second microstructure area 20 is located at a corner adjacent to the body 10, and the corner can be selected Located on the light incident surface 11 or the light incident surface 12 close to the body 10; as shown in FIG. 1, in the first preferred embodiment, the second microstructure region 20 is adjacent to the body 10 The light surface 12 can ensure that the light entering the original light guide film will not be interfered with the light path of the dots of the second microstructure area 20. Furthermore, the second microstructure 20 protrudes from the optical surface 13 of the body 10.

As shown in FIG. 1, in the first preferred embodiment of the present 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 present 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 creating a light guide film, in the microstructure process of creating a light guide film, when bumps are formed in the first microstructure region 14, protrusions are also formed in the second microstructure region 20 Point, it will not increase the process or difficulty of the process, but also effectively improve the efficiency of stripping.

Furthermore, as shown in FIG. 3, in the third preferred embodiment of the creative light guide film, the second microstructure region 20 is disposed on the edge of the 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 edge 17, 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 original light guide film is formed by forming the second microstructure region 20 at the edge of the body 10 and forming a Arc-shaped area, and then use a cutter to cut the corners of the body 10 to form the body-shaped corner 16 so that the second microstructure area 20 can be located at the end of the body 10 Office.

Please refer to FIG. 4, which is a preferred embodiment of a combined structure of a light guide film and a release paper, which includes a 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 a 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 a 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 Front.

Referring 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 micro 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, and It is no longer necessary to peel off the release paper 30 through the adhesive tape, in addition to effectively improving the operation efficiency of the peeling operation of the release paper 30, and at the same time avoiding the risk of residual colloid on the light guide film.

In addition, as shown in FIG. 3, the second microstructure region 20 is provided at the edge of the body 10, which can provide the operator with direct peeling of the release paper 30 from the edge of the light guide film, which can further improve the release paper 30 Convenience and efficiency of stripping operations. Furthermore, the arc-shaped edge of the body 10 further helps reduce the difficulty of the worker performing the stripping operation.

In summary, the original light guide film is mainly provided with the second microstructure area 20 in the blank area 15 of the optical surface 13 to reduce the time when the release paper 30 is attached to the light guide film The contact area of the paper, which in turn reduces the viscosity between the release paper 30 and the light guide film, allowing the operator to peel the release paper 30 directly with bare hands without the need to stick it with tape, which can effectively Improve the convenience and efficiency of the operation, while also avoiding the risk of colloids remaining on the light guide film.

10: Ontology

11: Light side

12: Reflected light

13: Optical surface

14: The first microstructure area

15: white space

16: curved corner

17: side margin

20: 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 a 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: A perspective partial schematic view of the combined structure of the light guide film and release paper of this creation. Figure 5: A top view of the backlight module of this creation. Figure 6: A schematic top view of the creative display device.

10: Ontology

11: Light side

12: Reflected light

13: Optical surface

14: The first microstructure area

15: white space

16: curved corner

17: side margin

20: Second microstructure area

Claims (11)

A light guide film includes: a body including a light incident surface, a reverse light incident surface and an optical surface, the light incident surface and the reverse light incident surface are respectively located on 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 a second microstructure area, which is disposed in the blank area of the optical surface and is located Adjacent to the corner of the body. The light-guiding film of claim 1, wherein the second microstructure region is adjacent to the light incident surface of the body. The light guide film according to claim 1 or 2, wherein the second microstructure region is provided at an edge of the body. The light guide film according to claim 1 or 2, wherein the second microstructure protrudes from the optical surface of the body. The light guide film according to claim 1 or 2, wherein a blank space is formed between the second microstructure area and the first microstructure area. The light guide film according to claim 1 or 2, wherein the second microstructure region is connected to the first microstructure region. The light guide film according to claim 1 or 2, wherein the body has a plurality of side edges and a plurality of arc-shaped corners, each arc-shaped corner connects adjacent side edges, and the second microstructure area is It extends from the curved corner toward the side edge. The light guide film according to claim or 2, wherein the optical surface of the body is a reflective surface. A combined structure of light guide film and release paper, comprising: a light guide film as described in any one of claims 1 to 8; and A release paper 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 area of the light guide film. A backlight module, comprising: a light guide film as described in any one of claims 1 to 8; and a light source which is adjacent to the light incident surface of the light guide film. A display device comprising: a backlight module as described in claim 10; and a display panel which is located in front of the light guide film of the backlight module.

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