CN218524911U - Visual angle enlarging film and display device - Google Patents
Visual angle enlarging film and display device Download PDFInfo
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- CN218524911U CN218524911U CN202222970336.3U CN202222970336U CN218524911U CN 218524911 U CN218524911 U CN 218524911U CN 202222970336 U CN202222970336 U CN 202222970336U CN 218524911 U CN218524911 U CN 218524911U
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Abstract
The utility model relates to a display device technical field especially relates to a visual angle enlarges membrane and display device. The visual angle expanding film comprises a substrate and an expanding film group, the expanding film group comprises a first film layer and a second film layer which are sequentially arranged along the light emergent direction, and the refractive index of the first film layer is greater than that of the second film layer; the light emergent surface of the first film layer is provided with a plurality of first protruding parts at intervals along the left-right direction, the light incident surface of the second film layer is provided with a plurality of second protruding parts at intervals along the left-right direction, and the first protruding parts are respectively inserted between two corresponding adjacent second protruding parts, so that the light emergent surface of the first film layer is in concave-convex fit with the light incident surface of the second film layer. Two expansion film groups are arranged on the substrate along the light emergent direction, and the extending direction of the first protruding part and the second protruding part of one expansion film group is vertical to the extending direction of the first protruding part and the second protruding part of the other expansion film group. The display device comprises the visual angle enlarging film, and the visual angles along the left direction, the right direction, the upper direction and the lower direction can be enlarged.
Description
Technical Field
The utility model relates to a display device technical field especially relates to a visual angle enlarges membrane and display device.
Background
In a conventional display device, such as a liquid crystal display device, most of the light from the backlight is emitted perpendicularly from the screen, and a small portion of the light is emitted obliquely from the screen. If the user cannot see the original color when watching the screen from a certain larger angle, the color cast phenomenon is serious, and even only the image which is completely white or black can be seen.
At present, the display device has the problems that 1) the visual angle of the display device is small, the requirement of a user for watching from various different visual angles is difficult to meet, and the user experience is reduced. 2) The existing scheme for expanding the visual angle of the screen only can expand the visual angle from a single direction of the left-right direction or the up-down direction, the requirement of expanding the visual angle from multiple directions is difficult to realize, and the display effect of the display device is reduced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a visual angle enlarges membrane and display device expands the visual angle from left right direction and upper and lower direction, improves display device's display effect.
To achieve the purpose, the utility model adopts the technical proposal that:
a visual angle expanding film comprises a substrate and an expanding film group, wherein the expanding film group comprises a first film layer and a second film layer which are sequentially arranged along a light emergent direction, and the refractive index of the first film layer is greater than that of the second film layer; the light emitting surface of the first film layer is provided with a plurality of first protruding parts at intervals along the left-right direction, the light incident surface of the second film layer is provided with a plurality of second protruding parts at intervals along the left-right direction, and the first protruding parts are respectively inserted between two corresponding adjacent second protruding parts, so that the light emitting surface of the first film layer is in concave-convex fit with the light incident surface of the second film layer;
the base material is provided with two expansion membrane groups along the light emergent direction, one of the expansion membrane group is the extension direction of the first lug boss and the second lug boss is perpendicular to the extension direction of the first lug boss and the second lug boss of the expansion membrane group.
Preferably, the refractive index of the first film layer is N1, the refractive index of the second film layer is N2, and N2 is more than or equal to 1.4 and less than or equal to N1 and less than or equal to 1.8.
Preferably, the first protruding portion and the second protruding portion are both quadrangular prisms with isosceles trapezoid cross sections.
Preferably, the height of the quadrangular prism along the light emergent direction is 5-50 μm, and the distance between two adjacent quadrangular prisms is 5-50 μm.
Preferably, the first protruding portion and the second protruding portion are both cylinders with semicircular sections.
Preferably, the radius of the cylinder is 5 μm to 50 μm, and the distance between two adjacent cylinders is 5 μm to 50 μm.
Preferably, the two expansion film groups are sequentially stacked on one side surface of the substrate along the light emergent direction.
Preferably, the two expansion film groups are respectively disposed on two side surfaces of the substrate along the light emergent direction.
Preferably, the first film layer and the second film layer are both transparent ultraviolet curing glue layers.
A display device comprises the visual angle expansion film.
The beneficial effects of the utility model are that:
the utility model provides a visual angle enlarges membrane, because the refracting index of first rete is greater than the refracting index of second rete, when light in proper order when first bellying and second bellying in an expansion membrane group, shine at the partial light of the medial surface of first bellying can take place the total reflection and get into the second bellying with bigger incident angle refraction, then jet out from the second rete, the contained angle between the normal of the play plain noodles of light and second rete has been increased, thereby the light that the direction slope jetted out about having increased towards, the visual angle along the left right direction has been increased promptly. Because the extending directions of the first protruding parts and the second protruding parts of the two expanding film groups are perpendicular to each other, the light rays obliquely emitted towards the up-down direction can be increased when the light rays sequentially pass through the first protruding parts and the second protruding parts in the other expanding film group, and the visual angle along the up-down direction is increased. The utility model provides a visual angle enlarges membrane can increase along the visual angle of controlling four directions from top to bottom, has improved the display effect, has improved user experience and has felt.
The utility model provides a display device includes foretell visual angle and enlarges the membrane, can increase display device along the visual angle of controlling four directions from top to bottom, has improved display device's display effect, has improved user experience and has felt.
Drawings
Fig. 1 is a longitudinal sectional view of a viewing angle enlarging film according to an embodiment of the present invention;
fig. 2 is a longitudinal sectional view of a viewing angle enlarging film according to an embodiment of the present invention.
The component names and designations in the drawings are as follows:
1. a substrate; 2. enlarging the membrane group; 21. a first membrane layer; 211. a first boss; 22. a second film layer; 221. a second boss.
Detailed Description
In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements relevant to the present invention are shown in the drawings.
In the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected", "connected" and "fixed" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The technical solution of the present invention is further explained by the following embodiments with reference to the drawings.
Example one
The present embodiment provides a display device, which may be a liquid crystal display device or other products, and is not limited herein. Specifically, the display device includes a backlight, a screen, and the like. Most of the light of the backlight is vertically emitted from the screen, and a small part of the light is obliquely emitted from the screen.
At present, the visual angle of the display device is small, so that the user cannot watch the display device from various different visual angles, and the user experience is reduced. Moreover, the existing scheme for enlarging the viewing angle of the screen can only enlarge the viewing angle from a single direction of the left-right direction or the up-down direction, and the display effect of the display device is reduced.
In order to solve the above problem, as shown in fig. 1, the present embodiment further proposes a viewing angle enlarging film, where the viewing angle enlarging film includes a substrate 1 and an enlarging film set 2, the enlarging film set 2 includes a first film layer 21 and a second film layer 22 sequentially arranged along a light emitting direction, and a refractive index of the first film layer 21 is greater than a refractive index of the second film layer 22. The light emitting surface of the first film layer 21 is provided with a plurality of first protrusions 211 at intervals along the left-right direction, the light incident surface of the second film layer 22 is provided with a plurality of second protrusions 221 at intervals along the left-right direction, and the plurality of first protrusions 211 are respectively inserted between two adjacent corresponding second protrusions 221, so that the light emitting surface of the first film layer 21 is in concave-convex fit with the light incident surface of the second film layer 22. Two expansion film groups 2 are arranged on the substrate 1 along the light emergent direction, and the extending direction of the first protruding part 211 and the second protruding part 221 of one expansion film group 2 is perpendicular to the extending direction of the first protruding part 211 and the second protruding part 221 of the other expansion film group 2.
Note that, as shown in fig. 1, the light emitted from the backlight is represented by line segments shown by a and b. The light emitting direction is the propagation direction of the light of the backlight source in the substrate 1 and is perpendicular to the left and right directions, and the up and down directions are perpendicular to the left and right directions and the light emitting direction respectively.
Because the refractive index of the first film layer 21 is greater than that of the second film layer 22, when light sequentially passes through the first protrusion 211 and the second protrusion 221 in one of the expansion film groups 2, part of the light irradiated on the inner side surface of the first protrusion 211 is totally reflected and refracted at a larger incident angle to enter the second protrusion 221, and then is emitted from the second film layer 22, so that an included angle between the light and a normal of a light emitting surface of the second film layer 22 is increased, thereby increasing the light obliquely emitted towards the left-right direction, that is, increasing the viewing angle along the left-right direction. Since the extending directions of the first convex portions 211 and the second convex portions 221 of the two expansion film groups 2 are perpendicular to each other, when light sequentially passes through the first convex portions 211 and the second convex portions 221 of the other expansion film group 2, light obliquely emitted in the up-down direction can be increased, that is, the viewing angle in the up-down direction is increased. The visual angle enlarging film can enlarge the visual angles of the display device in the left, right, upper and lower directions, improve the display effect and improve the user experience.
As shown in fig. 1, two expansion film groups 2 are sequentially stacked on one side surface of the substrate 1 in the light outgoing direction. Specifically, the substrate 1 is sequentially provided with a first film layer 21, a second film layer 22, a first film layer 21 and a second film layer 22 from bottom to top on the upper surface in the light emitting direction, and a first protruding portion 211 of the first film layer 21 and a second protruding portion 221 of the second film layer 22 located below extend in the up-down direction to increase the viewing angle in the left-right direction. The first convex portions 211 of the first film layer 21 and the second convex portions 221 of the second film layer 22 located above extend in the left-right direction to increase the viewing angle in the up-down direction.
Specifically, the first film layer 21 and the second film layer 22 are both transparent ultraviolet curing glue layers, so that the substrate 1 can be processed and formed conveniently, and the processing difficulty of the visual angle enlarging film is reduced. The substrate 1 is made of a plastic material, such as PET or PC, to give the substrate 1 a certain toughness. Of course, the substrate 1 may be made of other materials such as glass according to actual requirements, and is not limited in particular.
It should be noted that the refractive index of the first film layer 21 is N1, the refractive index of the second film layer 22 is N2, and N2 is greater than or equal to 1.4 and less than N1 and less than or equal to 1.8.
As shown in fig. 1, the first protrusion 211 and the second protrusion 221 are quadrangular prisms with isosceles trapezoid cross sections. Specifically, the height H of the quadrangular prism along the light emitting direction is 5-50 μm, and the distance T between two adjacent quadrangular prisms is 5-50 μm. The two inclined surfaces of the first protrusion 211 of this embodiment can guide the light b, and the extending direction of the first protrusion 211 is perpendicular to the direction of the expanded viewing angle.
For easy understanding, as shown in fig. 1, when light rays a and b vertically enter the two expansion film groups 2 from the substrate 1, the light rays a incident on the upper bottom surfaces of the first protrusions 211 of the lowermost first film layer 21 or the middle plane areas of the two first protrusions 211 can sequentially pass through the second film layer 22 and the first film layer 21 of the upper expansion film group 2, and exit from the uppermost second film layer 22. When the light b is incident on the inclined surface of the first protrusion 211 of the first film layer 21 located at the lowermost position, the light b can be fully emitted, that is, the light b is incident on the second protrusion 221 of the second film layer 22 of the enlarged film group 2 located at the lowermost position at a larger incident angle, so that an included angle between the light b and a normal of a light emitting surface of the second film layer 22 is increased, and a viewing angle of the display device along the left-right direction is increased. Similarly, when the light b continuously enters the inclined plane of the first protrusion 211 of the first film layer 21 located above, part of the light b can be totally reflected, and an included angle between the light b and the normal line of the light emitting surface of the uppermost second film layer 22 is increased, so that the viewing angle of the display device in the up-and-down direction is increased, the viewing angle of the display device in the left-and-right and up-and-down directions can be increased by the viewing angle enlarging film, and the display effect is improved.
It should be noted that, the inclination angles of the two inclined planes of the first protruding portion 211 can be flexibly adjusted according to the requirement of the display effect and the actually selected materials with different refractive indexes, and it is only necessary to ensure that the total reflection occurs after the inclined planes of the first protruding portion 211 can pass through the partial light b, so as to enlarge the emitting angle of the light from the uppermost second film layer 22.
In an embodiment of the invention, the first protrusion 211 and the second protrusion 221 may also be both cylinders with a semicircular cross section, the radius of the cylinder is 5 μm to 50 μm, and the distance between two adjacent cylinders is 5 μm to 50 μm. The cylindrical arc surface can also play a guiding role for the light ray b, so that the partial light ray b can be totally reflected on the arc surface of the first convex part 211, and the visual angle of the display device in the left, right, upper and lower directions is increased. The trace of the light b on the two expansion film groups 2 is not described in detail herein.
The display device of the embodiment comprises the visual angle enlarging film, so that the visual angles in the left, right, upper and lower directions can be enlarged, the display effect is improved, and the user experience is improved.
Example two
This embodiment proposes a viewing angle enlarging film, which is substantially the same as the viewing angle enlarging film of the first embodiment, and can also achieve an increase in the viewing angle of the display device in four directions, i.e., right, left, up, and down, and improve the display effect. The main difference points are as follows: the two expansion membrane groups 2 are mounted at different positions.
Specifically, as shown in fig. 2, two expansion film groups 2 are respectively disposed on two side surfaces of the substrate 1 along the light outgoing direction. The first protrusion 211 and the second protrusion 221 of the expansion film group 2 below the substrate 1 in the light outgoing direction extend in the left-right direction, and the viewing angle in the up-down direction can be expanded. The first and second protrusions 211 and 221 of the expansion film group 2 above the substrate 1 in the light outgoing direction extend in the up-down direction, and the viewing angle in the left-right direction can be expanded. The viewing angle in the up-and-down direction is increased after the light b passes through the expansion film group 2 below the substrate 1, and then the viewing angle in the left-and-right direction is increased after the light b passes through the expansion film group 2 above the substrate 1. Since the trajectories of the light ray a and the light ray b are the same as those of the first embodiment, they will not be described again.
The embodiment further provides a display device, which comprises the visual angle enlarging film, so that the visual angles in the left, right, upper and lower directions can be enlarged, the display effect is improved, and the user experience is improved.
The above embodiments have been described only the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and is not departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The visual angle expanding film is characterized by comprising a substrate (1) and an expanding film group (2), wherein the expanding film group (2) comprises a first film layer (21) and a second film layer which are sequentially arranged along a light emergent direction, and the refractive index of the first film layer (21) is greater than that of the second film layer; the light emitting surface of the first film layer (21) is provided with a plurality of first protruding portions (211) at intervals along the left-right direction, the light incident surface of the second film layer is provided with a plurality of second protruding portions (221) at intervals along the left-right direction, and the first protruding portions (211) are respectively inserted between two corresponding adjacent second protruding portions (221) so that the light emitting surface of the first film layer (21) is in concave-convex fit with the light incident surface of the second film layer;
be provided with two along the light-emitting direction on substrate (1) expand membrane group (2), one expand membrane group (2) first bellying (211) with the extending direction of second bellying (221) and another expand membrane group (2) first bellying (211) with the extending direction looks vertical of second bellying (221).
2. The viewing angle expansion film according to claim 1, wherein the refractive index of the first film layer (21) is N1, the refractive index of the second film layer is N2, and 1.4 ≦ N2 < N1 ≦ 1.8.
3. The viewing angle enlarging film according to claim 1, wherein each of the first convex portion (211) and the second convex portion (221) is a quadrangular prism having an isosceles trapezoid cross section.
4. The viewing angle enlarging film according to claim 3, wherein the height of said quadrangular prism in the light outgoing direction is 5 to 50 μm, and the pitch between two adjacent quadrangular prisms is 5 to 50 μm.
5. The viewing angle enlarging film according to claim 1, wherein each of the first convex portion (211) and the second convex portion (221) is a cylinder having a semicircular cross section.
6. The viewing angle enlarging film according to claim 5, wherein the radius of said cylinder is 5 μm to 50 μm, and the interval between two adjacent cylinders is 5 μm to 50 μm.
7. The viewing angle enlarging film according to any one of claims 1 to 6, wherein two of said groups of enlarging films (2) are sequentially stacked on one side of said substrate (1) in said light outgoing direction.
8. The viewing angle enlarging film according to any one of claims 1 to 6, wherein two of the groups of enlarging films (2) are respectively disposed on both sides of the substrate (1) in the light outgoing direction.
9. The viewing angle expansion film according to any one of claims 1 to 6, wherein the first film layer (21) and the second film layer are both transparent UV-curable glue layers.
10. A display device comprising the viewing angle expanding film according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222970336.3U CN218524911U (en) | 2022-11-08 | 2022-11-08 | Visual angle enlarging film and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222970336.3U CN218524911U (en) | 2022-11-08 | 2022-11-08 | Visual angle enlarging film and display device |
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| Publication Number | Publication Date |
|---|---|
| CN218524911U true CN218524911U (en) | 2023-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222970336.3U Active CN218524911U (en) | 2022-11-08 | 2022-11-08 | Visual angle enlarging film and display device |
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|---|---|
| CN (1) | CN218524911U (en) |
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- 2022-11-08 CN CN202222970336.3U patent/CN218524911U/en active Active
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