CN107167956B - Optical film, display device, and terminal device - Google Patents

Abstract

The present application provides an optical film, a display device and a terminal device. The optical film includes an in-coupling micro-nano structure, an out-coupling micro-nano structure, and the in-coupling micro-nano structure and the out-coupling micro-nano structure are embedded in the matrix of the optical film; the in-coupling micro-nano structure receives incident light from the first region, The incident light is reflected to the out-coupling micro-nano structure, and the first area is located on one side of the substrate; the out-coupling micro-nano structure reflects the reflected incident light, and the reflected incident light goes to the second area again, The second region is located on the other side of the base body. When the optical film of the present application is attached to a transparent panel of a display device, black borders can be reduced.

Description

Optical films, display devices and terminal equipment

technical field

The present application relates to the field of display technology, and more particularly, to an optical film, a display device, and a terminal device.

Background technique

The surface of the liquid crystal display is generally provided with a transparent panel. For display purposes, a drive circuit needs to be placed under the edge of the transparent panel. Therefore, when the image is finally displayed, there will be a part of the edge (surroundings) of the transparent panel where the image cannot be displayed. Also known as black borders. Since the appearance of black borders will affect the viewing effect of the user and reduce the user experience, it is necessary to provide a method that can reduce the black borders.

SUMMARY OF THE INVENTION

The present application provides an optical film, a display device and a terminal device, so as to reduce the black border of the display device.

In a first aspect, an optical film is provided, the optical film comprising: an in-coupling micro-nano structure and an out-coupling micro-nano structure, wherein both the in-coupling micro-nano structure and the out-coupling micro-nano structure are embedded in the optical film The in-coupling micro-nano structure receives incident light from a first region, and reflects the incident light to the out-coupling micro-nano structure, and the first region is located on one side of the matrix; the The out-coupling micro-nano structure performs reflection processing on the reflected incident light, and the reflected incident light is directed to a second area, and the second area is located on the other side of the substrate.

By sticking the optical film in the present application on the transparent panel of the display device, it is possible to make part of the light in the display area of the display module of the display device without changing the structure and assembly process of the display screen of the current display device. After two reflections of the in-coupling micro-nano structure and the out-coupling micro-nano structure in the optical film, it can be emitted from the area corresponding to the non-display area in the transparent panel, which can reduce the black edge of the display device and improve the display effect of the display device.

With reference to the first aspect, in some implementations of the first aspect, the distance between the in-coupling micro-nano structure and the upper surface of the base body is smaller than the distance between the in-coupling micro-nano structure and the lower surface of the base body. The distance between the out-coupling micro-nano structures and the upper surface of the base body is greater than the distance between the in-coupling micro-nano structures and the lower surface of the base body.

Optionally, the distance between the in-coupling micro-nano structure and the upper surface of the substrate is smaller than the distance between the out-coupling micro-nano structure and the upper surface of the substrate, and the distance between the in-coupling micro-nano structure and the lower surface of the substrate is greater than the distance between the out-coupling micro-nano structure and the lower surface of the substrate. distance from the surface.

With reference to the first aspect, in some implementations of the first aspect, the upper surface of the in-coupling micro-nano structure is flush with the upper surface of the base body, and the lower surface of the out-coupling micro-nano structure is flush with the base body the top surface is flush.

By reasonably setting the positions of the in-coupling micro-nano structure and the out-coupling micro-nano structure relative to the substrate, the in-coupling micro-nano structure and the out-coupling micro-nano structure can be staggered (so that the in-coupling micro-nano structure and the out-coupling micro-nano structure are in different positions) height), in this case, the in-coupling micro-nano structure can better reflect the received incident light to the out-coupling micro-nano structure. Specifically, in order to make the in-coupling micro-nano structure reflect the received incident light to the out-coupling micro-nano structure, the in-coupling micro-nano structure and the out-coupling micro-nano structure cannot be at the same height in the substrate, but must be respectively at the same height. Different heights, otherwise the in-coupling micro-nano structure cannot reflect the received incident light to the out-coupling micro-nano structure.

With reference to the first aspect, in some implementations of the first aspect, the thicknesses of the in-coupling micro-nano structures and the out-coupling micro-nano structures are both less than 1/10 of the thickness of the substrate.

When the thickness of the in-coupling micro-nano structure and the out-coupling micro-nano structure is too large, the reflection of incident light will be affected. The micro-nano structure cannot reflect the received incident light to the out-coupling micro-nano structure (or the reflection effect is very poor). Therefore, when the thickness of the in-coupling micro-nano structure and the out-coupling micro-nano structure is much smaller than the thickness of the substrate, The in-coupling micro-nano structure can better reflect the received incident light to the out-coupling micro-nano structure.

In conjunction with the first aspect, in some implementations of the first aspect, the in-coupling micro-nano structure includes a plurality of first micro-nano sub-structures, and each adjacent two of the plurality of first micro-nano sub-structures The minimum distances between the first micro-nano substructures are all greater than or equal to the width of each first micro-nano sub-structure in the plurality of first micro-nano sub-structures; each first micro-nano sub-structure includes a reflective surface , the minimum included angle between the reflective surface of the first micro-nano-substructure and the bottom surface of the first micro-nano-substructure is an acute angle, and the reflective surface of the first micro-nano-substructure faces the outcoupling nanostructure.

By setting a larger distance between the multiple micro-nano substructures of the in-coupling micro-nano structure, the mutual interference between light reflected by different sub-structures of the in-coupling micro-nano structure can be reduced or avoided, and the reflection effect can be improved.

Optionally, the spacing between every two adjacent first micro/nano structures in the above-mentioned plurality of first micro/nano structures is the same.

By uniformly arranging a plurality of micro-nano substructures in the in-coupling micro-nano structure, the light reflected from the in-coupling micro-nano structure to the out-coupling micro-nano structure is uniform reflected light.

With reference to the first aspect, in some implementations of the first aspect, the reflectivity of the reflective surface of the first micro-nano substructure is 20%-50%.

By reasonably setting the reflectivity of the reflection surface of the micro-nano-substructure of the in-coupling micro-nano structure, the in-coupling micro-nano structure can reflect enough light to the out-coupling micro-nano structure.

In combination with the first aspect, in some implementations of the first aspect, the outcoupling micro-nano structure includes a plurality of second micro-nano sub-structures, and any two of the plurality of second micro-nano sub-structures are second The maximum spacing between the micro-nano substructures is less than or equal to the width of any one of the plurality of second micro-nano sub-structures; each second micro-nano sub-structure includes a reflective surface, and the The minimum angle between the reflection surface of the second micro-nano substructure and the bottom surface of the second micro-nano sub-structure is an acute angle, and the reflection surface of the second micro-nano sub-structure faces the in-coupling micro-nano structure.

By setting a small distance between the multiple micro-nano substructures of the out-coupling micro-nano structure, the light reflected by the in-coupling micro-nano structure can be reflected out as much as possible, thereby improving the display effect.

Optionally, the spacing between any two adjacent sub-structures in the plurality of second micro-nano sub-structures is the same.

By uniformly arranging a plurality of micro-nano sub-structures in the out-coupling micro-nano structure, the final reflection of the out-coupling micro-nano structure is uniform reflected light.

With reference to the first aspect, in some implementations of the first aspect, the reflectivity of the reflective surface of the second micro-nano-substructure is greater than 50%.

By setting a larger reflectivity (greater than 50%) for the reflection surface of the micro-nano-substructure of the out-coupling micro-nano structure, the out-coupling micro-nano structure can make as much light reflected by the in-coupling micro-nano structure as possible again. reflected, thereby increasing the intensity of the light finally reflected by the out-coupled micro-nano structures.

With reference to the first aspect, in some implementations of the first aspect, the optical film further includes: a first transparent film, the first transparent film is attached to the upper surface of the base; a second transparent film, the The second transparent film is attached to the lower surface of the base.

By arranging transparent films on the upper and lower surfaces of the substrate, the in-coupling micro-nano structures and the out-coupling micro-nano structures in the substrate can be protected.

In a second aspect, a display device is provided, the display device comprising: a display module, a transparent panel, and the optical film of the first aspect or any implementation manner of the first aspect, wherein the optical film is located in the display module between the display module and the transparent panel, and the display module and the optical film are both located inside the transparent panel; the display module includes a display area and a non-display area; the optical film includes an in-coupling microfilm Nanostructure and out-coupling micro-nano structure; the in-coupling micro-nano structure reflects the light emitted by the display area to the out-coupling micro-nano structure, and the out-coupling micro-nano structure reflects the in-coupling micro-nano structure The incoming light is reflected to the area corresponding to the non-display area in the transparent panel, wherein, along the direction perpendicular to the plane where the transparent panel is located, the projection of the non-display area in the plane where the transparent panel is located The located area is the area corresponding to the non-display area in the transparent panel.

In this application, the light emitted from the display area is reflected twice by the in-coupling micro-nano structure and the out-coupling micro-nano structure, so that part of the light in the display area can be reflected to the area corresponding to the non-display area in the transparent panel, so that the visual It can reduce the black border at the edge of the transparent panel and improve the user experience.

With reference to the second aspect, in some implementations of the second aspect, the display device further includes: a light guide body, and the light guide body is disposed on a side of the display area away from the transparent panel.

Specifically, it is assumed that the transparent panel is located above the display area, and the display area includes an upper surface and a lower surface, wherein the upper surface is in contact with the transparent panel, and the light guide body is located below the lower surface of the display area (the light guide body may be in contact with the display area). contact with the lower surface).

Optionally, the above-mentioned light guide body may be composed of at least one light emitting diode (Light Emitting Diode, LED).

Since the in-coupling micro-nano structure reflects part of the light in the display area to the out-coupling micro-nano structure, the intensity of the light emitted from the area corresponding to the display area in the transparent panel will be weakened to a certain extent. The conductor performs light compensation to ensure the intensity of the light emitted from the area corresponding to the transparent panel and the display area, and to ensure the display effect.

With reference to the second aspect, in some implementations of the second aspect, along a direction perpendicular to the plane where the display area is located, the projection of the light guide body on the plane where the display area is located is located in the display area in the edge area adjacent to the non-display area.

Since the in-coupling micro-nano structure mainly reflects the light emitted from the edge region adjacent to the non-display in the display region to the out-coupling micro-nano structure, the light in the edge region in the display region is relatively light from other regions in the display region. There will be obvious weakening, and the light emitted from the edge region can be better compensated by arranging the light guide directly in the edge region.

In combination with the second aspect, in some implementations of the second aspect, along a direction perpendicular to the plane where the display area of the display module is located, the in-coupling micro-nano structure is located where the display area of the display module is located. The projection in the plane of the display module is located in the display area, and the projection of the out-coupling micro-nano structure in the plane in which the display area of the display module is located is located in the non-display area.

When the projections of the in-coupling micro-nano structure and the out-coupling micro-nano structure on the plane where the display module is located are located in the display area and the non-display area, respectively, the in-coupling micro-nano structure can well receive the light emitted from the display area, so that It can better reflect part of the light in the display area to the out-coupling micro-nano structure, and the out-coupling micro-nano structure can directly exit the light reflected by the in-coupling micro-nano structure from above the non-display area, thereby illuminating the non-display area. The transparent panel above, reducing the black borders.

With reference to the second aspect, in some implementations of the second aspect, the display area and the non-display area are located on the same plane.

In combination with the second aspect, in some implementations of the second aspect, the in-coupling micro-nano structure includes a plurality of first micro-nano sub-structures, and each adjacent two of the plurality of first micro-nano sub-structures The minimum distances between the first micro-nano substructures are all greater than or equal to the width of each first micro-nano sub-structure in the plurality of first micro-nano sub-structures; each first micro-nano sub-structure includes a reflective surface , the minimum included angle between the reflective surface of the first micro-nano-substructure and the bottom surface of the first micro-nano-substructure is an acute angle, and the reflective surface of the first micro-nano-substructure faces the outcoupling nanostructure.

By setting a larger distance between the multiple micro-nano substructures of the in-coupling micro-nano structure, the mutual interference between light reflected by different sub-structures of the in-coupling micro-nano structure can be reduced or avoided, and the reflection effect can be improved.

With reference to the second aspect, in some implementations of the second aspect, along the thickness direction of the transparent panel, the sum of the projected areas of the plurality of first micro-nano-substructures in the display area is the display area 20%-50% of the area.

The projected area of the multiple micro-nano-substructures in the in-coupling micro-nano structure above the display area should be controlled within a certain range. If the projected area is too large, the brightness of the outgoing light above the display area will be seriously weakened. If it is very small, the light reflected from the in-coupling micro-nano structure to the out-coupling micro-nano structure is very limited, thereby affecting the brightness of the light emitted from the area corresponding to the non-display area in the transparent panel.

With reference to the second aspect, in some implementations of the second aspect, the acute angle formed between the reflection surface of the first micro-nano substructure and the plane where the display area is located is 22.5 degrees to 43.57 degrees.

By setting a certain angle, it can be ensured that the reflective surface of the in-coupling micro-nano structure can reflect the light emitted from the display area to the reflective surface of the out-coupling micro-nano structure.

In combination with the second aspect, in some implementations of the second aspect, the outcoupling micro-nano structure includes a plurality of second micro-nano sub-structures, and any two of the plurality of second micro-nano sub-structures are second The maximum spacing between the micro-nano substructures is less than or equal to the width of any one of the plurality of second micro-nano sub-structures; each second micro-nano sub-structure includes a reflective surface, and the The minimum angle between the reflection surface of the second micro-nano substructure and the bottom surface of the second micro-nano sub-structure is an acute angle, and the reflection surface of the second micro-nano sub-structure faces the in-coupling micro-nano structure.

By setting a small distance between the multiple micro-nano substructures of the out-coupling micro-nano structure, the light reflected by the in-coupling micro-nano structure can be reflected out as much as possible, thereby improving the display effect.

With reference to the second aspect, in some implementations of the second aspect, along the thickness direction of the transparent panel, the projected area of the plurality of second micro-nano-substructures in the non-display area is the non-display area 50%-100% of the area.

For the out-coupling micro-nano structure, it mainly re-reflects the light reflected by the in-coupling micro-nano structure and then outputs it from the area corresponding to the non-display area in the transparent panel. Therefore, the out-coupling micro-nano structure is in the non-display area. The larger the area of the upper projection, the better, so that the light reflected by the in-coupling micro-nano structure can be reflected as much as possible to improve the display effect.

With reference to the second aspect, in some implementations of the second aspect, the acute angle formed between the reflective surface of the second micro-nano substructure and the plane where the non-display area is located is 22.5 degrees to 43.57 degrees.

By setting a certain angle, it can be ensured that the reflective surface of the out-coupling micro-nano structure can re-reflect the light reflected by the reflective surface of the in-coupling micro-nano structure and then exit from the area of the transparent panel corresponding to the non-display area.

In a third aspect, a terminal device is provided, the terminal device includes a housing and the display device in any one of the implementation manners of the second aspect and the second aspect, wherein the display device is located inside the housing.

By arranging the in-coupling micro-nano structure and the out-coupling micro-nano structure in the display device in the terminal equipment, the light emitted from the display area can be reflected twice, and part of the light in the display area can be reflected to the transparent panel and the non-display area. Corresponding area, so that the black border located at the edge of the transparent panel can be reduced, and the user experience can be improved.

Description of drawings

FIG. 1 is a schematic diagram of a conventional display device.

FIG. 2 is a schematic diagram of an optical film according to an embodiment of the present application.

3 is a schematic diagram of an in-coupling micro-nano structure and an out-coupling micro-nano structure in an optical film according to an embodiment of the present application.

FIG. 4 is a schematic diagram of an optical film according to an embodiment of the present application.

FIG. 5 is a schematic diagram of a display device according to an embodiment of the present application.

FIG. 6 is a schematic diagram of an in-coupling micro-nano structure and an out-coupling micro-nano structure in a display device according to an embodiment of the present application.

FIG. 7 is a schematic diagram of an in-coupling micro-nano structure and an out-coupling micro-nano structure in an embodiment of the present application.

FIG. 8 is a schematic diagram of a display device according to an embodiment of the present application.

FIG. 9 is a schematic diagram of a brightness effect of a display device according to an embodiment of the present application.

FIG. 10 is a schematic diagram of an in-coupled micro-nano structure in an embodiment of the present application.

FIG. 11 is a schematic diagram of an out-coupled micro-nano structure in an embodiment of the present application.

FIG. 12 is a schematic diagram of fabricating the in-coupling micro-nano structure and the out-coupling micro-nano structure in the embodiment of the present application.

FIG. 13 is a schematic diagram of an in-coupling micro-nano structure and an out-coupling micro-nano structure in an embodiment of the present application.

Detailed ways

The technical solutions in the present application will be described below with reference to the accompanying drawings.

In order to better understand the display device of the embodiment of the present application, the following briefly introduces the existing display device with reference to FIG. 1 .

FIG. 1 is a schematic structural diagram of a conventional display device. The display device 100 may be located in a terminal device (eg, a mobile phone, a tablet computer, and other electronic devices including a liquid crystal display). As shown in FIG. 1 , the display device 100 includes a B shell 101 (back shell), an A shell 102 (front shell), a display module 104 and a transparent panel 105 . The display module 104 and the transparent panel 105 are connected together by optically clear adhesive (OCA), and the transparent panel 105 and the A shell 102 are connected together by an adhesive 103 (specifically, OCA adhesive). The area where the display module 104 contacts the transparent panel 105 is the display screen 107 of the display module 104. Since the display module 104 has the driving circuit 106, the display screen 107 is divided into a non-display area 108 and a display area 109, wherein , the non-display area 108 is located above the driving circuit 106 . Since the display area 109 itself can emit light 110, but the non-display area 108 itself cannot emit light, therefore, the area 112 corresponding to the transparent panel 107 and the display area 109 is an area that can display images normally, while the transparent panel 107 and the non-display area The area 111 corresponding to 108 will form a black border due to the very weak light emitted. Specifically, the area 112 of the transparent panel 107 corresponding to the display area 109 may be the area above the display area 109 in the transparent panel, and the area 111 of the transparent panel 107 corresponding to the non-display area 108 may be the area of the transparent panel located in the non-display area 108 and the gap area on the left side of the non-display area 108 (due to the existence of material structure and assembly tolerance, a certain gap area will be formed between the transparent panel 107, the display module 104 and the A shell 102).

In order to improve the user experience and minimize the black borders generated in the area corresponding to the non-display area in the transparent panel of the display device, the present application proposes an optical film. The optical film includes an in-coupling micro-nano structure and an out-coupling micro-nano structure. When the optical film is placed between the transparent panel of the display device and the display module, the in-coupling micro-nano structure can connect the output of the display area of the display module. The incident light is reflected to the out-coupling micro-nano structure, and then the out-coupling micro-nano structure reflects the light reflected by the in-coupling micro-nano structure and exits from the area of the transparent panel corresponding to the non-display area, thereby reducing the edge area of the transparent panel. Black border, improve the display effect.

FIG. 2 is a schematic diagram of an optical film according to an embodiment of the present application. The optical film 200 includes:

The in-coupling micro-nano structure and the out-coupling micro-nano structure, as shown in FIG. 2 , are both embedded in the matrix of the optical film 200 .

Wherein, the in-coupling micro-nano structure receives the incident light from the first region of the optical film, and reflects the incident light to the out-coupling micro-nano structure; the out-coupling micro-nano structure re-reflects the reflected incident light, and is again The reflected incident light is directed towards the second area. Wherein, the first area is located on one side of the base of the optical film, and the second area is located on the other side of the base of the optical film. Further, as shown in FIG. 2 , the first region may be located below the in-coupling micro-nano structure, and the second region may be located above the out-coupling micro-nano structure.

By sticking the optical film in the present application on the transparent panel of the display device, it is possible to make part of the light in the display area of the display module of the display device without changing the structure and assembly process of the display screen of the current display device. After the in-coupling micro-nano structure and the out-coupling micro-nano structure in the optical film are reflected twice, it can be emitted from the area corresponding to the non-display area in the transparent panel, which can reduce the black edge of the transparent panel edge of the display device and improve the display device. display effect.

The above-mentioned optical film can be a nearly transparent film, the transmittance of the optical film can be more than 90%, and the thickness of the optical film can be between 0.2-0.5 mm.

It should be understood that the above-mentioned optical film 200 may be provided in the display device 100 as shown in FIG. 1 . Specifically, the optical film 200 may be disposed between the display module 104 and the transparent panel 105 , and further, the optical film 200 may be attached to the lower surface of the transparent panel 105 and the upper surface of the display module 104 . When the optical film 200 is disposed between the display module 104 and the transparent panel 105, the following two conditions can be specifically satisfied:

(1), along the direction perpendicular to the plane where the display area 109 and the non-display area 108 of the display module 104 are located, the projection of the in-coupling micro-nano structure on the plane where the display area 109 and the non-display area 108 of the display area 104 are located in display area 109;

(2), along the direction perpendicular to the plane where the display area 109 and the non-display area 108 of the display module 104 are located, the projection of the outcoupling micro-nano structure on the plane where the display area 109 and the non-display area 108 of the display area 104 are located in the non-display area 108 .

Further, when the distance between the in-coupling micro-nano structure and the out-coupling micro-nano structure and the upper and lower surfaces of the substrate satisfies certain conditions, the light reflection effect is better. Specifically, the distance between the in-coupling micro-nano structures and the upper surface of the substrate is smaller than the distance between the in-coupling micro-nano structures and the lower surface of the substrate, and the distance between the out-coupling micro-nano structures and the upper surface of the substrate is greater than the in-coupling distance. The distance between the micro-nano structure and the lower surface of the substrate. Alternatively, the distance between the in-coupling micro-nano structure and the upper surface of the substrate may be smaller than the distance between the out-coupling micro-nano structure and the upper surface of the substrate, and the distance between the in-coupling micro-nano structure and the lower surface of the substrate is greater than the distance between the out-coupling micro-nano structure and the lower surface of the substrate. the distance.

In addition, when the in-coupling micro-nano structure and the out-coupling micro-nano structure are arranged in the substrate, the upper surface of the in-coupling micro-nano structure can be flush with the upper surface of the substrate, and the lower surface of the out-coupling micro-nano structure can be flush with the upper surface of the substrate. flush.

By reasonably setting the positions of the in-coupling micro-nano structure and the out-coupling micro-nano structure relative to the substrate, the in-coupling micro-nano structure and the out-coupling micro-nano structure can be staggered (so that the in-coupling micro-nano structure and the out-coupling micro-nano structure are in different positions) height), in this case, the in-coupling micro-nano structure can better reflect the received incident light to the out-coupling micro-nano structure. Specifically, in order to make the in-coupling micro-nano structure reflect the received incident light to the out-coupling micro-nano structure, the in-coupling micro-nano structure and the out-coupling micro-nano structure cannot be at the same height in the substrate, otherwise the in-coupling micro-nano structure The structure cannot reflect the received incident light to the out-coupled micro-nano structure.

Optionally, the thicknesses of the in-coupling micro-nano structures and the out-coupling micro-nano structures are both less than 1/10 of the thickness of the substrate.

It should be understood that the thicknesses of the in-coupling micro-nano structures and the out-coupling micro-nano structures may be the lengths of the in-coupling micro-nano structures and the out-coupling micro-nano structures along the direction of the thickness of the base of the optical film.

When the thickness of the in-coupling micro-nano structure and the out-coupling micro-nano structure is too large, the reflection of incident light will be affected. The nanostructure cannot reflect the received incident light to the out-coupling micro-nano structure (or the reflection effect is very poor). Therefore, when the thickness of the in-coupling micro-nano structure and the out-coupling micro-nano structure is much smaller than the thickness of the substrate, it can The in-coupling micro-nano structure can better reflect the received incident light to the out-coupling micro-nano structure.

Optionally, the above-mentioned in-coupling micro-nano structure includes a plurality of first micro-nano sub-structures (the in-coupling micro-nano structure is composed of a plurality of first micro-nano sub-structures), and, among the plurality of first micro-nano sub-structures, The minimum distance between every two adjacent first micro/nano structures is greater than or equal to the width of each first micro/nano structure in the plurality of first micro/nano structures; in addition, each first micro/nano structure Each of the sub-structures includes a reflective surface, the minimum angle between the reflective surface of the first micro-nano sub-structure and the bottom surface of the first micro-nano sub-structure is an acute angle, and the reflective surface of the first micro-nano sub-structure faces the outcoupling micro- nanostructure.

By setting a larger distance between the multiple micro-nano substructures of the in-coupling micro-nano structure, the mutual interference between light reflected by different sub-structures of the in-coupling micro-nano structure can be reduced or avoided, and the reflection effect can be improved.

Optionally, the above-mentioned out-coupling micro-nano structure includes a plurality of second micro-nano sub-structures (the out-coupling micro-nano structure is composed of a plurality of second micro-nano sub-structures), any two of the plurality of second micro-nano sub-structures. The maximum spacing between the second micro-nano substructures is less than or equal to the width of any one of the plurality of second micro-nano sub-structures; in addition, each second micro-nano sub-structure includes a reflection The minimum angle between the reflection surface of the second micro-nano structure and the bottom surface of the second micro-nano structure is an acute angle, and the reflection surface of the second micro-nano structure faces the in-coupling micro-nano structure.

By setting a small distance between the multiple micro-nano substructures of the out-coupling micro-nano structure, the light reflected by the in-coupling micro-nano structure can be reflected out as much as possible, thereby improving the display effect.

It should be understood that the width of the first micro/nano structure can be defined in the following two ways.

method one:

Along the direction perpendicular to the plane where the upper surface of the substrate is located, the width of the projection of the first micro-nano substructure on the plane where the upper surface of the substrate is located is the width of the first micro-nano substructure.

Method two:

The length of the short side of the rectangular projection of the first micro-nano structure in the plane where the upper surface of the substrate is located along the direction perpendicular to the plane where the upper surface of the substrate is located.

Similarly, the width of the first micro-nano-substructure can also be defined according to the first and second methods above.

As shown in Figure 3, the in-coupling micro-nano structure is composed of four first micro-nano sub-structures, and the out-coupling micro-nano structure is composed of four second micro-nano sub-structures. The spacing between the micro-nano structures is greater than the width of any first micro-nano structure; the out-coupling micro-nano structure includes 4 second micro-nano structures, and the spacing between every two adjacent second micro-nano structures is smaller than the width of any second micro-nano-substructure; in addition, in FIG. 3 , both the first micro-nano-substructure and the second micro-nano-substructure include reflective surfaces, and these reflective surfaces are connected to the ground of the corresponding micro-nano-substructure. The minimum included angles are all acute angles, and the reflective surfaces of the first micro-nano structure and the second micro-nano structure are placed opposite to each other.

Optionally, the reflectivity of the reflective surface of the first micro/nano structure is 20%-50%.

By reasonably setting the reflectivity of the reflection surface of the micro-nano-substructure of the in-coupling micro-nano structure, the in-coupling micro-nano structure can reflect enough light to the out-coupling micro-nano structure.

Optionally, the reflectivity of the reflective surface of the second micro-nano substructure is greater than 50%.

By setting a larger reflectivity (greater than 50%) for the reflection surface of the micro-nano-substructure of the out-coupling micro-nano structure, the out-coupling micro-nano structure can make as much light reflected by the in-coupling micro-nano structure as possible again. reflected, thereby increasing the intensity of the light finally reflected by the out-coupled micro-nano structures.

In order to protect the in-coupling micro-nano structures and the out-coupling micro-nano structures in the optical film, the optical film 200 may further include a first transparent film and a second transparent film, wherein the first transparent film is attached to the upper surface of the substrate , the second transparent film is attached to the lower surface of the base.

By arranging transparent films on the upper and lower surfaces of the base of the optical film 200 , the in-coupling micro-nano structures and the out-coupling micro-nano structures in the base can be protected.

The above-mentioned first transparent film and the second transparent film can also be referred to as the first protective layer and the second protective layer. The protective layer is composed of optically transparent materials, which can be glass or optical resin. For example, the protective layer can be made of ethyl phthalate. Diol ester (Polyethylene terephthalate, PET), polycarbonate (Polycarbonate, PC) and polymethyl methacrylate (Polymethylmethacrylate, PMMA) and other materials are composed of one or more, in addition, the first protective layer or the second The surface of the protective layer can also be provided with a hardening coating. The total thickness of the first protective layer or the second protective layer may be between 0.3mm-0.8mm.

By arranging transparent films on the upper and lower surfaces of the substrate, the in-coupling micro-nano structures and the out-coupling micro-nano structures in the substrate can be protected.

For example, as shown in FIG. 4 , the matrix 1002 (or referred to as the main structure) of the optical film 1001 includes in-coupling micro-nano structures and out-coupling micro-nano structures, and the optical film 1001 further includes a transparent protective layer 1004 and a transparent protective layer 1006 , the user protects the in-coupling micro-nano structure and the out-coupling micro-nano structure in the optical film. The left figure in FIG. 4 is a top view of the optical film 1001 , and the right figure is a cross-sectional view of the optical film 1001 .

FIG. 5 is a schematic diagram of a display device according to an embodiment of the present application. The display device 300 includes:

The display module 204, the transparent panel 206, and the optical film 200 above.

The optical film 200 is located in the space 205 between the display module 204 and the transparent panel 206, and the optical film 200 is located under the transparent panel 206, and the display module 204 is located under the optical film 200, that is, the display module 204 and the optical film 200 are located inside the transparent panel 206 .

In addition, the display module 204 includes a display screen 208 , and the display screen 208 includes a non-display area 209 and a display area 210 , wherein the non-display area 209 itself does not emit light, and the light emitted by the display area 210 is 211 .

The optical film 200 includes an in-coupling micro-nano structure and an out-coupling micro-nano structure, wherein the in-coupling micro-nano structure reflects the light emitted by the display area 210 to the out-coupling micro-nano structure, and the out-coupling micro-nano structure then converts the in-coupling micro-nano structure. The reflected light is reflected to the area 212 in the transparent panel 206 corresponding to the non-display area, wherein, along the direction perpendicular to the plane where the transparent panel is located, the area where the projection of the non-display area in the plane where the transparent panel is located is the difference between the transparent panel and the non-display area. The area corresponding to the display area, or the area corresponding to the non-display area in the transparent panel may also include the area where the projection of the transparent panel in the plane of the transparent panel along the direction perpendicular to the plane where the transparent panel is located in the void area adjacent to the non-display area. .

The area corresponding to the transparent panel and the display area or the non-display area will be introduced below with reference to FIG. 5. As shown in FIG. area and the display area corresponding to the non-display area 209 . The area 213 of the transparent panel 209 corresponding to the display area 209 may be the area of the transparent panel 206 located directly above the display area 210 , and the area 212 of the transparent panel 206 corresponding to the non-display area 209 may be located in the non-display area 209 and the area just above the gap area on the left side of the non-display area 209 , or the area corresponding to the non-display area in the transparent panel 206 except for the area corresponding to the display area.

As shown in FIG. 6 , the in-coupling micro-nano structure 301 and the out-coupling micro-nano structure 401 are placed in the space 205 of the display device 300 , the display area 210 emits light 210 , and when the light 210 passes through the in-coupling micro-nano structure 301 , a part of The light exits through the in-coupling micro-nano structure and the transparent panel 206 (the light that finally exits from the area corresponding to the display area in the transparent panel is 211), and another part of the light is reflected by the in-coupling micro-nano structure 301 to the out-coupling micro-nano structure 401 (the light reflected by the in-coupling micro-nano structure to the out-coupling micro-nano structure is 212), next, the out-coupling micro-nano structure 401 re-reflects the light 212 reflected by the in-coupling micro-nano structure 301, so that the out-coupling micro-nano structure 301 reflects light again. The light reflected by the structure 401 is emitted from the transparent panel 206 to obtain the light 213 .

Since there is light reflected from the outcoupling micro-nano structure in the area corresponding to the non-display area in the transparent panel, more light is emitted from the area corresponding to the non-display area in the transparent panel, thereby reducing the edge of the transparent panel. Black border.

In this application, the light emitted from the display area is reflected twice by the in-coupling micro-nano structure and the out-coupling micro-nano structure, so that part of the light in the display area can be reflected to the area corresponding to the non-display area in the transparent panel, so that the visual It can reduce the black border on the edge of the transparent panel and improve the user experience.

It should be understood that in the display device of the present application, the transparent panel and the display module may only include in-coupling micro-nano structures and out-coupling micro-nano structures, that is to say, the display device of the present application may not include an optical film, but It directly includes the in-coupling micro-nano structure and the out-coupling micro-nano structure. Moreover, the in-coupling micro-nano structure can be fixed on the transparent panel, and the out-coupling micro-nano structure can be fixed on the display module.

As shown in FIG. 7 , the in-coupling micro-nano structure 602 and the out-coupling micro-nano structure 603 can be disposed on the surface of the optical film 601 (or inside the optical film 601 , here only the surface of the optical film 601 is used as a specific example). Example), in specific implementation, the optical film 601 can be placed between the transparent panel and the display screen of the display device, so that the in-coupling micro-nano structure 602 is located above the display area, and the out-coupling micro-nano structure 603 is located above the non-display area. Furthermore, when the optical film 601 is placed, the distances between the in-coupling micro-nano structures 602 and the out-coupling micro-nano structures 603 from the junction of the display area and the non-display area can be equal. In addition, the widths of the above-mentioned in-coupling micro-nano structures 602 and out-coupling micro-nano structures 603 may be between 0.2-1.0 mm.

It should be understood that the above-mentioned display area may be a partial display area of all display areas in the entire display screen, for example, the above-mentioned display area may be a partial display area close to the non-display area. In addition, the non-display area may also be a partial non-display area in the entire non-display area in the display screen. For example, the non-display area may be a partial non-display area near a certain side of the display screen.

Since the in-coupling micro-nano structure reflects part of the light in the display area to the output of the area of the transparent panel located above the non-display area, the brightness of the light emitted from the area of the transparent panel located above the display area decreases. Compensation for the light emitted from the area of the display area can be achieved by arranging a light guide body on the side of the display area away from the transparent panel.

Specifically, assuming that the transparent panel is located above the display area, and the display area includes an upper surface and a lower surface, then the upper surface of the display area is the side close to the transparent panel, and the lower surface of the display area is the side away from the transparent panel. , the light guide body is arranged on the lower surface of the display area, specifically, the light guide body is arranged below the lower surface of the display area. Furthermore, the light guide can consist of at least one LED.

Since the in-coupling micro-nano structure reflects part of the light in the display area to the out-coupling micro-nano structure, the intensity of the light emitted from the area corresponding to the display area in the transparent panel will be weakened to a certain extent. The light body performs light compensation to ensure the intensity of the light emitted from the area corresponding to the transparent panel and the display area, thereby improving the display effect.

Further, along the direction perpendicular to the plane where the display area is located, the projection of the light guide body on the plane where the display area is located is located in the edge area adjacent to the non-display area in the display area.

Since the in-coupling micro-nano structure mainly reflects the light emitted from the edge region adjacent to the non-display in the display region to the out-coupling micro-nano structure, the light in the edge region in the display region is relatively light from other regions in the display region. There will be obvious weakening, and the light emitted from the edge region can be better compensated by arranging the light guide directly in the edge region.

The following describes how to perform light compensation by using a light guide body with reference to FIG. 8 . As shown in FIG. 8 , the display device 400 includes: a display screen 1101 , a backlight panel 1106 , and a controller 1109 . The display screen 1101 is equivalent to the display screen 208 in the above-mentioned display device 400, and the display screen 1101 also includes a display area and a non-display area. The display screen 1101 is connected to the controller 1109 , the controller 1109 outputs an image control signal to the display screen 1101 , and the display screen outputs image information after receiving the image control signal from the controller 1109 . The display screen 1101 includes an edge area 1102 (the area where the non-display area of the display screen 1101 is located), and a strip-shaped light guide 1108 located below the edge area 1102 (specifically, the light guide 1108 can be arranged on the lower surface of the edge area 1102 ) ), the bar-shaped light guide body 1108 includes at least one LED bulb 1103, and the bar-shaped light guide body is used to perform light compensation on the display area in the display screen to ensure the brightness of the light emitted from the area corresponding to the display area in the transparent panel . In addition, the display device 400 further includes a strip-shaped light guide backlight driving circuit 1110 and a backlight plate driving circuit 1111 . The controller 1109 lights up the backlight panel 1106 by controlling the backlight panel drive circuit 1111 to output current pulses to the bulb group 1107 on the backlight panel 1106. At least one LED bulb 1103 of the light body 1108 (the LED bulb 1103 is the light source of the strip-shaped light guide body 1108 ) is used to perform light compensation on the display area located at the edge area of the display screen.

In order to detect the emitted light intensity, the display device 400 further includes a light intensity sensor 1112, a light intensity sensor 1113 and a light intensity sensor 1114. The functions of the three light intensity sensors are as follows: The light intensity sensor 1112 is used to measure the external environment Light intensity, the controller 1109 can adjust and control the light 1104 emitted by the backlight panel 1106 through the light intensity signal fed back by the light intensity sensor 1112; the light intensity sensor 1113 is used to measure the brightness 1104 of the backlight panel 1106, The light intensity signal fed back by the intensity sensor 1113 can adjust the light 1105 emitted by the bar-shaped light guide 1108; the light intensity sensor 1114 can be installed on the optical path of the light 1105 emitted by the bar-shaped light guide 1108, as shown in FIG. 8 , the light intensity sensor 1114 can be arranged at the position 1120 outside the display screen to detect the brightness of the light in the edge area of the display screen. , the light intensity signal fed back by the light intensity sensor 1114 may also be taken into account.

Therefore, by arranging the strip-shaped light guide 1108 below the display area, light compensation can be performed on the display area of the display device 400, so that the brightness of the light emitted from the area corresponding to the display area in the transparent panel can still meet a certain level Therefore, when reducing the black edge of the transparent panel edge, the light brightness of the area corresponding to the display area in the transparent panel can also be guaranteed, thereby improving the user experience.

Specifically, the above-mentioned light intensity sensors 1112, 1113 and 1114 can be integrated with a photoelectric converter and a digital-to-analog converter, wherein the photoelectric sensor is used to convert the light signal in the detection area into an electrical signal, and output the electrical signal to the digital-to-analog converter. Next, the digital-to-analog converter quantizes the electrical signal and outputs the quantized electrical signal to the controller 1109. The controller 1109 can obtain from the digital-to-analog converter the brightness of the light in the detection area and the preset value. It is assumed that the brightness is compared, and a closed-loop control signal is generated according to the comparison result, so as to control the driving circuits 1110 and 1111 to control the luminous intensity of the backlight panel 1106 and the bar-shaped light guide 1108 .

The display effect of the above-mentioned display device 400 is shown in FIG. 9 . In FIG. 9 , the strip-shaped light guide body 1202 overlaps with the light emitted by the backlight panel 1201 . Therefore, a light overlapping area is formed in the area where the strip-shaped light guide body 1202 is located. . Specifically, the light emitted by the backlight plate 1201 is 1203, and its corresponding brightness curve is 1206. The controller 1109 controls the strip light guide 1202 to emit light 1204 with the same or similar intensity, and the backlight 1201 and the strip light guide 1202 emit light 1204. The rays of light are superimposed to form light rays 1205, and the corresponding brightness curve is 1207. Since the in-coupling micro-nano structure and the out-coupling micro-nano structure are arranged above the display area and the non-display area, respectively, after the light 1205 is reflected by the in-coupling micro-nano structure and the out-coupling micro-nano structure, the output range of the light is expanded. (The area corresponding to the transparent panel and the non-display area also emits light), the brightness of the light decreases (here, the brightness is reduced by half as an example), and finally the brightness of the light emitted from the area corresponding to the transparent panel and the non-display area is the same as the transparent panel and the display area. The brightness of the corresponding light is the same, and the brightness curves of the light emitted from the area corresponding to the display area and the area corresponding to the non-display area in the final transparent panel are both 1208.

It should be understood that the above-mentioned backlight plate or strip-shaped light guide body may include one or more LEDs, and the LEDs may be connected in parallel or in series, or in a series-parallel hybrid connection.

Optionally, when the display screen of the display device 300 is an organic light emitting diode (Organic Light Emitting Diode, OLED) display screen, since a backlight module is not required, the display device 300 can be further simplified, for example, the display device 300 can be removed from FIG. 8 The backlight drive circuit 1111 and the strip-shaped light guide 1110 shown in , the controller 1109 can control the driving current of the pixel units at the in-coupling micro-nano structure and the out-coupling micro-nano structure of the display module, so as to increase the light Intensity, so as to perform light compensation on the display area.

Further, for an OLED display that can actively emit light, its brightness curve 1207 can be set as a decreasing or increasing curve or a straight line, so that after the light path is reflected by the in-coupling micro-nano structure and the out-coupling micro-nano structure, it can be more Smooth output, so that the brightness of the light does not change suddenly.

In addition, when the brightness of the OLED display is above 50%, it is difficult to double the brightness of the display area by adjusting the driving current of the pixel unit. At this time, you can continue to set the strip light guide 1108 under the display area. , in order to achieve a wider range of adjustment of the brightness of the light, specifically, when the brightness of the OLED display screen is below 50%, the strip-shaped light guide can be turned off, and the brightness of the light can be adjusted only by adjusting the driving current of the pixel unit, while When the brightness of the display screen exceeds 50%, the strip-shaped light guide body can be turned on, and the brightness of the display screen can be adjusted jointly by adjusting the driving current of the pixel unit and the light emission of the strip-shaped light guide body.

Optionally, the above-mentioned in-coupling micro-nano structure includes a plurality of first micro-nano sub-structures, and the minimum distance between each adjacent two first micro-nano sub-structures in the plurality of first micro-nano sub-structures is the same. greater than or equal to the width of each of the plurality of first micro-nano sub-structures; in addition, each first micro-nano sub-structure includes a reflective surface, and the reflective surface of the first micro-nano sub-structure The smallest included angle with the bottom surface of the first micro-nano substructure is an acute angle, and the reflective surface of the first micro-nano substructure faces the out-coupling micro-nano structure.

Optionally, the above-mentioned outcoupling micro-nano structure includes a plurality of second micro-nano sub-structures, and the maximum distance between any two second micro-nano sub-structures in the plurality of second micro-nano sub-structures is less than or equal to the plurality of second micro-nano sub-structures. The width of any one of the second micro-nano sub-structures; in addition, each second micro-nano sub-structure includes a reflective surface, and the reflective surface of the second micro-nano sub-structure is the same as the second micro-nano sub-structure. The minimum included angle between the bottom surfaces of the structures is an acute angle, and the reflective surface of the second micro-nano structure faces the in-coupling micro-nano structure.

It should be understood that the width of the above-mentioned first micro/nano structure may be along the direction perpendicular to the plane where the upper surface of the substrate is located, the width of the projection of the first micro/nano structure on the plane where the upper surface of the substrate is located, and the width of the first micro/nano structure The width can also be the length of the short side of the rectangular projection of the first micro-nano structure in the plane where the upper surface of the substrate is located. The width of the second micro-nano structure is similar to that of the first micro-nano structure.

For example, in FIG. 6 , both the in-coupling micro-nano structure 301 and the out-coupling micro-nano structure 401 include a plurality of micro-nano substructures.

By setting a larger distance between the multiple micro-nano substructures of the in-coupling micro-nano structure, the mutual interference between light reflected by different sub-structures of the in-coupling micro-nano structure can be reduced or avoided, and the reflection effect can be improved. This is because the larger the distance between the multiple micro-nano substructures of the in-coupling micro-nanostructure, the less shading or interference of light reflected between adjacent sub-structures.

In addition, by setting a relatively small distance between the multiple micro-nano substructures of the out-coupling micro-nano structure, the light reflected by the in-coupling micro-nano structure can be reflected out as much as possible, thereby improving the display effect. It should be understood that the in-coupling micro-nano structure is to reflect part of the light in the display area to the out-coupling micro-nano structure. Therefore, the distance between multiple micro-nano substructures in the in-coupling micro-nano structure cannot be too small, otherwise the display will be displayed. Most of the light in the area is reflected to the out-coupling micro-nano structure, thereby seriously weakening the brightness of the light emitted from the area corresponding to the display area in the transparent panel. The spacing should be set appropriately larger. For the out-coupling micro-nano structure, the out-coupling micro-nano structure needs to reflect the light reflected by the in-coupling micro-nano structure to the area above the non-display area in the transparent panel for output. Therefore, the out-coupling micro-nano structure The spacing between the multiple micro-nano structures included in the structure is set as small as possible, so that the out-coupling micro-nano structures can reflect as much light as possible from the in-coupling micro-nano structures from the transparent panel to the non-display area. Corresponding middle emission, so as to enhance the brightness of the light emitted from this area and improve the display effect.

For example, as shown in FIG. 6 , the in-coupling micro-nano structure 301 includes a plurality of micro-nano sub-structures, and these micro-nano sub-structures are located directly above the display area, and the out-coupling micro-nano structure 401 also includes a plurality of micro-nano sub-structures. The micro-nano substructure is located above the non-display area.

When the multiple micro-nano substructures of the in-coupling micro-nano structure are located directly above the display area, part of the light in the display area can be better reflected to the out-coupling micro-nano structure. Specifically, if the in-coupling micro-nano structure is located above the non-display area, the in-coupling micro-nano structure cannot receive direct light from the display area, but can only receive a small part of the indirect light in the display area at most. If the coupled micro-nano structure is located above the display area, the in-coupling micro-nano structure can directly receive light directly from the display area, and the effect of receiving light from the display area is better.

When the multiple micro-nano substructures of the out-coupling micro-nano structures are located above the non-display area, part of the light reflected by the in-coupling micro-nano structures can be better emitted from the transparent panel and the area corresponding to the non-display area.

Further, a plurality of micro-nano substructures of the out-coupling micro-nano structure can be located not only above the non-display area, but also above the gap area between the non-display area and the transparent panel, thus expanding the out-coupling micro-nano structure. In the region where it is located, the reflection area of the out-coupling micro-nano structure is increased, thereby enhancing the reflection effect of the out-coupling micro-nano structure.

Optionally, the projection of the plurality of first micro-nano-substructures in the above-mentioned in-coupling micro-nano structures above the display area 210 is 20%-50% of the area of the display area 210 . The projection of the plurality of second micro-nano-substructures of the out-coupled micro-nano structures above the non-display region 209 is 50%-100% of the area of the display region 508 .

Specifically, the projected area of the plurality of first micro/nano substructures in the in-coupled micro/nano structure above the display area 210 should be controlled within a certain range. However, if the projection area is small, the light reflected from the in-coupling micro-nano structure to the out-coupling micro-nano structure is very limited, which in turn affects the brightness of the light emitted from the area corresponding to the non-display area in the transparent panel.

For the out-coupling micro-nano structure, it mainly re-reflects the light reflected by the in-coupling micro-nano structure and then outputs it from the area corresponding to the non-display area in the transparent panel. The larger the projected area of the two micro-nano sub-structures on the non-display area, the better, so that the light reflected by the in-coupling micro-nano structures can be reflected as much as possible to improve the display effect.

Optionally, the range of the acute angle formed between the reflecting surfaces of the first micro-nano substructure and the second micro-nano substructure and the plane where the display area is located is 22.5 degrees to 43.75 degrees.

By setting a certain angle, it can ensure that the reflective surface of the in-coupling micro-nano structure can reflect the light emitted from the display area to the reflective surface of the out-coupling micro-nano structure, and the reflective surface of the out-coupling micro-nano structure can reflect the in-coupling micro-nano structure. The light reflected by the reflective surface of the structure is reflected again and then exits from the area of the transparent panel corresponding to the non-display area.

Further, the acute angle formed by the reflection surface of the first micro-nano substructure and the plane where the display area is located is the same as the acute angle formed by the reflection surface of the second micro-nano substructure and the plane where the display area is located. At this time, after two reflections of the in-coupling micro-nano structure and the out-coupling micro-nano structure, part of the light in the display area can be reflected and shifted to exit from the transparent panel above the non-display area in a parallel or approximately parallel manner.

Optionally, the specific shape of the plurality of first micro-nano-substructures included in the above-mentioned in-coupling micro-nano structure may be a triangle (specifically, a right-angled triangle).

For example, as shown in Fig. 10, the shape of the first micro-nano-substructure in the in-coupling micro-nano structure is a right triangle. The cross-sectional view of the nano-structure, since the shape of the first micro-nano structure is a triangle, the projection of the first micro-nano structure on the optical film 703 is a rectangle (the length of the rectangle is the length of the first micro-nano structure ), the cross section of the first coupled micro/nano structure 701 is a triangle, wherein the side of the triangle along the horizontal direction is the width of the first coupled micro/nano structure, and the side in the vertical direction is the depth of the first coupled micro/nano structure. The length of the first coupled micro-nano substructure may be 1-10um, the width is 1-10um, and the depth is 1-10um.

In Figure 10, the area of the right triangle is smaller than that of the optical film, which makes these right triangles only reflect a part of the light from the display area to the out-coupling micro-nano structure, ensuring that the transparent panel corresponds to the display area. area can also be output by enough light.

Optionally, the specific shape of the plurality of second micro-nano-substructures included in the above-mentioned out-coupling micro-nano structure may also be a triangle (specifically, a right-angled triangle).

For example, as shown in Figure 11, the shape of the second coupled micro-nano structure is a right triangle. In Figure 11, the left picture is a top view of the out-coupling micro-nano structure, and the right picture is a cross-sectional view of the out-coupling micro-nano structure. Since the shape of the second micro/nano structure is a triangle, the projection of the second coupled micro/nano structure on the optical film 703 is a rectangle (the length of the rectangle is the length of the second coupled micro/nano structure). The cross-section of the coupled micro-nano structure 701 is a triangle, wherein the side of the triangle along the horizontal direction is the width of the second coupled micro-nano sub-structure, and the side of the vertical direction is the depth of the second coupled micro-nano sub-structure. The second coupled micro-nano structure may have a length of 1-10um, a width of 1-10um, and a depth of 1-10um.

In Figure 11, the area occupied by all the micro-nano substructures in the out-coupling micro-nano structure is relatively close to the area of the optical film, so that the out-coupling micro-nano structure can reflect the light reflected by the in-coupling micro-nano structure as much as possible. is reflected from the transparent panel above the non-display area.

The present application also includes a terminal device, the terminal device including the display device in any of the above embodiments and a casing, wherein the display device is located in the casing. Specifically, the terminal device may be a smart terminal device including a display screen, for example, the terminal device may be a smart phone, a tablet computer, a wearable device, a personal computer, and so on.

By arranging the in-coupling micro-nano structure and the out-coupling micro-nano structure in the display device in the terminal equipment, the light emitted from the display area can be reflected twice, and part of the light in the display area can be reflected to the transparent panel and the non-display area. Corresponding area, so that the black border located at the edge of the transparent panel can be reduced, and the user experience can be improved.

The following briefly introduces the fabrication methods of the in-coupling micro-nano structure and the out-coupling micro-nano structure (or optical thin film) according to the embodiments of the present application with reference to FIG. 12 and FIG. 13 .

1101. Coating UV-curable embossing glue 903 on the PET or PC film substrate 902;

1102. Under certain conditions of temperature, pressure and time, use the mold 901 to press the UV-curable embossing adhesive 903 on the film substrate 902, so that the UV-curable imprinting adhesive 903 with flow characteristics gradually fills the gap of the mold 901, And use ultraviolet irradiation to cure the filled ultraviolet-curable embossing glue 903 .

The above-mentioned mold 901 has a complementary reverse structure that matches the in-coupling micro-nano structure or the out-coupling micro-nano structure, so that when the mold 901 is used to press the UV-curable imprint glue 903, the in-coupling micro-nano structure and the out-coupling can be formed. Micro-nano structure.

1103 . Separate the mold 901 from the cured imprint glue 903 that has been cured to form an optical structure 906 .

1104 . Turn the film substrate 902 over, and repeat steps 1101 to 1103 to form an optical structure 907 on the other side of the film substrate 902 .

The optical structure 907 and the optical structure 906 may be the above-mentioned in-coupling micro-nano structures and out-coupling micro-nano structures, respectively.

After the above steps 1101 to 1104, the in-coupling micro-nano structure, the out-coupling micro-nano structure or the optical thin film of the embodiment of the present application can be obtained. Next, the display device of the embodiment of the present application can be obtained through the following steps.

1105. Use OCA glue to attach the surface on one side of the optical structure 907 to the transparent panel.

1106. Laminate the surface of the optical structure 906 on one side with the display module with OCA glue.

The alignment accuracy should be ensured when laminating in steps 1105 and 1106, so that the optical structure 907 is located above the display area of the display module, and the optical structure 906 is located above the non-display area of the display module. The optical structure 906 and the optical structure 907 are arranged symmetrically with respect to the interface of the display area and the non-display area.

For the in-coupling micro-nano structure in the display device of the present application, it can be located in the optical film or on the inner surface of the transparent panel. When the in-coupling micro-nano structure is located on the inner surface of the transparent panel, a laser can be used. The inner surface of the transparent panel is processed by a photolithography or chemical etching process to obtain an in-coupling micro-nano structure. For the out-coupled micro-nano structure, the above steps 1101 to 1104 can still be used to obtain it.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims (18)

1. an optical film, is characterized in that, comprises: an in-coupling micro-nano structure, an out-coupling micro-nano structure, the in-coupling micro-nano structure and the out-coupling micro-nano structure are embedded in the matrix of the optical film; The in-coupling micro-nano structure receives incident light from a first region and reflects the incident light to the out-coupling micro-nano structure, and the first region is located on one side of the substrate; The out-coupling micro-nano structure performs reflection processing on the reflected incident light, and the reflected incident light is directed to a second area, and the second area is located on the other side of the substrate; The in-coupling micro-nano structure includes a plurality of first micro-nano sub-structures, and the minimum distance between each adjacent two first micro-nano sub-structures in the plurality of first micro-nano sub-structures is greater than or equal to all of the first micro-nano sub-structures. the width of each first micro-nano-substructure in the plurality of first micro-nano-substructures; Each of the first micro-nano substructures includes a reflective surface, and the minimum included angle between the reflective surface of the first micro-nano substructure and the bottom surface of the first micro-nano substructure is an acute angle, and the first micro-nano substructure has an acute angle. The reflection surface of the nano-substructure faces the out-coupling micro-nano structure. 2 . The optical film according to claim 1 , wherein the distance between the in-coupling micro-nano structures and the upper surface of the substrate is smaller than the distance between the in-coupling micro-nano structures and the lower surface of the substrate. 3 . The distance between the out-coupling micro-nano structures and the upper surface of the base body is greater than the distance between the in-coupling micro-nano structures and the lower surface of the base body. 3 . The optical film according to claim 2 , wherein the upper surface of the in-coupling micro-nano structure is flush with the upper surface of the base body, and the lower surface of the out-coupling micro-nano structure is flush with the base body 3 . the top surface is flush. 4. The optical film according to any one of claims 1-3, wherein the thicknesses of the in-coupling micro-nano structures and the out-coupling micro-nano structures are both less than 1/10 of the thickness of the substrate . 5 . The optical film according to claim 1 , wherein the reflectivity of the reflection surface of the first micro-nano substructure is 20%-50%. 6 . 6. The optical film according to any one of claims 1-3, wherein the outcoupling micro-nano structure comprises a plurality of second micro-nano sub-structures, among which the plurality of second micro-nano sub-structures The maximum spacing between any two second micro-nano substructures is less than or equal to the width of any one second micro-nano substructure in the plurality of second micro-nano substructures; Each of the second micro-nano substructures includes a reflective surface, the minimum angle between the reflective surface of the second micro-nano sub-structure and the bottom surface of the second micro-nano sub-structure is an acute angle, and the second micro-nano sub-structure has an acute angle. The reflecting surface of the nano-substructure faces the in-coupling micro-nano structure. 7 . The optical film according to claim 6 , wherein the reflectivity of the reflecting surface of the second micro-nano structure is greater than 50%. 8 . 8. The optical film of any one of claims 1-3, wherein the optical film further comprises: a first transparent film, the first transparent film is attached to the upper surface of the base; A second transparent film, the second transparent film is attached to the lower surface of the base. 9. A display device, comprising: a display module, a transparent panel and an optical film, the optical film is located between the display module and the transparent panel, and the display module and the The optical films are all located on the inner side of the transparent panel; The display module includes a display area and a non-display area; The optical film includes an in-coupling micro-nano structure and an out-coupling micro-nano structure; The in-coupling micro-nano structure reflects the light emitted by the display area to the out-coupling micro-nano structure, and the out-coupling micro-nano structure reflects the light reflected by the in-coupling micro-nano structure to the transparent panel The area corresponding to the non-display area in the the area corresponding to the non-display area; The in-coupling micro-nano structure includes a plurality of first micro-nano sub-structures, and the minimum distance between each adjacent two first micro-nano sub-structures in the plurality of first micro-nano sub-structures is greater than or equal to all of the first micro-nano sub-structures. the width of each first micro-nano-substructure in the plurality of first micro-nano-substructures; Each of the first micro-nano substructures includes a reflective surface, and the minimum included angle between the reflective surface of the first micro-nano substructure and the bottom surface of the first micro-nano substructure is an acute angle, and the first micro-nano substructure has an acute angle. The reflection surface of the nano-substructure faces the out-coupling micro-nano structure. 10. The display device according to claim 9, wherein the display device further comprises: A light guide body, the light guide body is arranged on a side of the display area away from the transparent panel. 11 . The display device according to claim 10 , wherein, along a direction perpendicular to the plane where the display area is located, the projection of the light guide body on the plane where the display area is located is located in the display area. 12 . in the edge area adjacent to the non-display area. 12. The display device according to any one of claims 9 to 11, wherein, along a direction perpendicular to a plane where a display area of the display module is located, the in-coupling micro-nano structure is in the display The projection in the plane where the display area of the module is located is located in the display area, and the projection of the outcoupling micro-nano structure in the plane where the display area of the display module is located is located in the non-display area. 13. The display device according to any one of claims 9 to 11, wherein, along the thickness direction of the transparent panel, the projection area of the plurality of first micro-nano-substructures in the display area is between the projection areas. The sum is 20%-50% of the area of the display area. 14. The display device according to any one of claims 9-11, wherein the acute angle formed between the reflection surface of the first micro-nano substructure and the plane where the display area is located is 22.5 degrees to 43.57 degrees. 15. The display device according to any one of claims 9 to 11, wherein the out-coupling micro-nano structure comprises a plurality of second micro-nano sub-structures, and among the plurality of second micro-nano sub-structures The maximum spacing between any two second micro-nano substructures is less than or equal to the width of any one second micro-nano substructure in the plurality of second micro-nano substructures; Each of the second micro-nano substructures includes a reflective surface, the minimum angle between the reflective surface of the second micro-nano sub-structure and the bottom surface of the second micro-nano sub-structure is an acute angle, and the second micro-nano sub-structure has an acute angle. The reflecting surface of the nano-substructure faces the in-coupling micro-nano structure. 16 . The display device according to claim 15 , wherein, along the thickness direction of the transparent panel, the projected area of the plurality of second micro-nano structures in the non-display area is the non-display area. 17 . 50%-100% of the area. 17 . The display device of claim 15 , wherein the acute angle formed between the reflection surface of the second micro-nano substructure and the plane where the non-display area is located is 22.5 degrees to 43.57 degrees. 18 . 18. A terminal device, characterized in that the terminal device comprises a housing and the display device according to any one of claims 9-17, wherein the display device is located inside the housing.

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