Optical film and display module

Abstract

The utility model relates to the technical field of optical films, in particular to an optical film and a display module. The optical film comprises a film body and a prism part; the plurality of prism parts are sequentially arranged along one side of the film body, and the prism parts are used for refracting emergent light of the film body; wherein the prism part is provided with a platform surface, and the platform surface is connected with the other adjacent prism part. In the optical film provided by the embodiment of the invention, the platform surface is arranged on the prism part, so that compared with a traditional optical film, the optical film has the advantages that the deflection rate of light rays can be improved so as to realize light emission at a specific visual angle, and the light receiving effect can be improved so as to improve the brightness.

Description

Technical Field

[0001] The utility model relates to the technical field of optical films, and in particular to an optical film and a display module. Background Art

[0002] TFT-LCD backlight module is an important component of LCD panel, and its main function is to provide uniform and stable light source for LCD panel. As an important component of backlight module, perspective membrane can control the viewing angle of LCD panel through special prism structure, using optical principles such as refraction and total reflection, and achieve specific light output angle, multi-viewing angle and wide viewing angle.

[0003] The existing viewing angle film usually adopts a right-angled triangle prism structure, which can achieve a single viewing angle deflection effect, but the brightness is low. In addition, the existing viewing angle film also has the problem of poor scratch resistance.

[0004] Therefore, it is necessary to make improvements to the above problems in order to change the current situation. Utility Model Content

[0005] The utility model provides an optical film and a display module, which are used to solve the problem of low brightness of the optical film in the prior art.

[0006] The utility model provides an optical film, comprising:

[0007] a membrane body; and

[0008] A prism portion, wherein the number of the prism portions is multiple, and the multiple prism portions are sequentially arranged along one side of the film body, and the prism portion is used to refract the output light of the film body; wherein the prism portion is provided with a platform surface, and the platform surface is connected to another adjacent prism portion.

[0009] According to one embodiment of the utility model, the prism portion has a connecting edge and a hypotenuse, the hypotenuse, the platform surface and the connecting edge are connected in sequence, and the platform surface is arranged in contact with the membrane body, the width of the platform surface is T, and the distance between two adjacent prism portions is P, wherein: T / (P+T)≤1 / 3.

[0010] According to an embodiment of the utility model, the optical film further comprises an optical filler, and the optical filler is filled in an open space enclosed by the bevel, the platform surface and the connecting edge.

[0011] According to an embodiment of the present invention, the optical filler includes a first filler and a second filler, the first filler is arranged inside the second filler, and the refractive index of the first filler is smaller than the refractive index of the second filler.

[0012] According to one embodiment of the utility model, the optical film further includes any one of the following:

[0013] Optionally, the width of the platform surface is 3 μm-35 μm; Optionally, the height of the connecting edge is 4 μm-80 μm;

[0014] Optionally, the distance between two adjacent prism portions is 8 μm-100 μm;

[0015] Optionally, the angle between the connecting edge and the hypotenuse is 10°-80°;

[0016] Optionally, the angle between the connecting edge and the hypotenuse of an adjacent prism portion is 10°-80°.

[0017] According to one embodiment of the utility model, the prism portion has a connecting edge and a hypotenuse, the hypotenuse, the platform surface and the connecting edge are connected in sequence, and the platform surface is spaced apart from the membrane body, the width of the platform surface is T, and the distance between two adjacent prism portions is P, wherein: T / P≤1 / 3.

[0018] According to one embodiment of the utility model, the optical film further includes any one of the following:

[0019] Optionally, the width of the platform surface is 3 μm-35 μm; Optionally, the height of the connecting edge is 4 μm-80 μm;

[0020] Optionally, the distance between two adjacent prism portions is 8 μm-100 μm;

[0021] Optionally, the angle between the connecting edge and the hypotenuse is 10°-80°;

[0022] Optionally, the angle between the connecting edge and the hypotenuse of an adjacent prism portion is 10°-80°.

[0023] The utility model also provides a display module, comprising:

[0024] Light emitting components;

[0025] An optical film as described in any one of the above items, wherein the optical film is arranged on the light emitting side of the light emitting component; and

[0026] The light emitting component is arranged on a side of the optical film away from the light emitting component.

[0027] According to an embodiment of the present invention, the display module further includes a brightness enhancement film, and the brightness enhancement film is at least partially disposed between the optical film and the light-emitting component.

[0028] According to an embodiment of the utility model, the number of the brightness enhancing films and the number of the optical films are both two, and one of the optical films and one of the brightness enhancing films are connected and arranged in the same plane, and the other optical film and another brightness enhancing film are connected and arranged in the same plane, wherein on the projection surface of the light-emitting component, one of the optical films is overlapped with the other brightness enhancing film, and one of the brightness enhancing films is overlapped with the other optical film.

[0029] According to an embodiment of the present invention, the prism portion is located on a side close to or far away from the brightness enhancement film.

[0030] According to an embodiment of the present invention, the number of the optical films is at least two, and the two layers of the optical films are stacked.

[0031] Implementing the embodiments of the utility model has the following beneficial effects:

[0032] In the optical film of this embodiment, by providing a platform surface on the prism part, compared with the traditional viewing angle film, the deflection rate of light can be increased to achieve light emission at a specific viewing angle, thereby improving the light collection effect and improving the brightness. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] in:

[0035] Figure 1 It is a schematic structural diagram of the optical film in the first embodiment of the utility model;

[0036] Figure 2 yes Figure 1 A magnified view of part A in the middle;

[0037] Figure 3 It is a schematic diagram of the structure of the optical film in the second embodiment of the utility model;

[0038] Figure 4 yes Figure 3 A magnified view of the detail B in the middle;

[0039] Figure 5 It is a structural schematic diagram of the display module in the first embodiment of the present utility model;

[0040] Figure 6It is a structural schematic diagram of the display module in the second embodiment of the present utility model;

[0041] Figure 7 It is a structural schematic diagram of the display module in the third embodiment of the present utility model;

[0042] Figure 8 It is a structural schematic diagram of the display module in the fourth embodiment of the present utility model;

[0043] Reference numerals:

[0044] 1. Display module; 10. Optical film; 100. Film body; 200. Prism; 210. Platform surface; 220. Connecting edge; 230. Bevel edge; 240. Optical filling; 21. Reflector; 22. Light guide plate; 23. LED; 24. Light-emitting diffuser; 31. LCD screen; 32. Light-emitting diffuser; 40. Brightness enhancement film. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0046] See also Figures 1 to 4 As shown, an embodiment of the utility model provides an optical film 10, which includes a film body 100 and a prism portion 200; the number of the prism portion 200 is multiple, and the multiple prism portions 200 are arranged in sequence along one side of the film body 100, and the prism portion 200 is used to refract the output light of the film body 100; wherein the prism portion 200 is provided with a platform surface 210, and the platform surface 210 is connected to another adjacent prism portion 200.

[0047] In the optical film 10 of this embodiment, by providing a platform surface 210 on the prism portion 200, compared with the conventional optical film 10, the deflection rate of light can be increased to achieve light emission at a specific viewing angle, thereby improving the light collection effect and improving the brightness.

[0048] See also Figure 1 and Figure 2 As shown, in embodiment 1, the prism portion 200 has a connecting edge 220 and a hypotenuse 230, the hypotenuse 230, the platform surface 210 and the connecting edge 220 are connected in sequence, and the platform surface 210 is arranged in close contact with the membrane body 100, the width of the platform surface 210 is T, and the distance between two adjacent prism portions 200 is P, wherein T and P satisfy the following formula: T / (P+T)≤1 / 3.

[0049] Furthermore, the optical film 10 further includes an optical filler 240 , and the optical filler 240 is filled in the open space enclosed by the bevel 230 , the platform surface 210 and the connecting edge 220 .

[0050] In one embodiment, the optical filler 240 includes a first filler and a second filler, the first filler is disposed inside the second filler, and the refractive index of the first filler is smaller than the refractive index of the second filler.

[0051] It is understood that when light propagates from one medium to another, the light will refract due to the different refractive indices between the media. Refraction is the phenomenon that light changes its propagation direction, and its degree depends on the difference in refractive indices between the two media. In the optical film of this embodiment, the first filler and the second filler are set to have different refractive indices.

[0052] The effect of reducing reflection can be achieved. When light propagates from the first filler to the second filler, due to the difference in refractive index, part of the light will be refracted and enter the second filler instead of being reflected. This reduces the reflection loss of light and allows more light to enter the next layer of medium.

[0053] The effect of reducing scattering can be achieved. Due to the difference in refractive index, when light is refracted at the interface between media, its propagation direction will change. This refraction phenomenon reduces the scattering of light and enables the light to be transmitted more concentratedly.

[0054] By selecting the appropriate refractive index difference, the first filler and the second filler can cooperate with each other to reduce the reflection and scattering of light, and improve the transparency and refractive index matching of the optical filler. This can further enhance the optical imaging effect of the optical film, so that it has better optical performance and visual effects in practical applications.

[0055] Specifically, the optical film 10 further includes any one of the following parameters:

[0056] Optionally, T in the figure is defined as the width of the platform surface 210, and the width T is 3 μm-35 μm;

[0057] Optionally, H in the figure is defined as the height of the connecting edge 220, and the height H is 4 μm-80 μm;

[0058] Optionally, P in the figure is defined as the distance between two adjacent prism parts 200, and the distance P is 8 μm-10 μm;

[0059] Optionally, the angle a in the figure is defined as the angle between the connecting edge 220 and the hypotenuse 230, and the angle a is 10°-80°;

[0060] Optionally, the angle b in the figure is defined as the angle between the connecting edge 220 and the hypotenuse 230 of an adjacent prism portion 200, and the angle b is 10°-80°.

[0061] See also Figure 2 As shown, in some specific implementations of this embodiment, the performance parameters of the optical film 10 are as follows:

[0062]

[0063] See also Figure 3 and Figure 4 As shown, in the second embodiment, the prism portion 200 has a connecting edge 220 and a hypotenuse 230, the hypotenuse 230, the platform surface 210 and the connecting edge 220 are connected in sequence, and the platform surface 210 is spaced apart from the membrane body 100, the width of the platform surface 210 is T, and the distance between two adjacent prism portions 200 is P, wherein: T / P≤1 / 3.

[0064] Specifically, the optical film 10 further includes any one of the following:

[0065] Optionally, T in the definition diagram is the width of the platform surface 210, and the width T is 3 μm-35 μm; Optionally, H in the definition diagram is the height of the connecting edge 220, and the height H is 4 μm-80 μm;

[0066] Optionally, P in the figure is defined as the distance between two adjacent prism parts 200, and the distance P is 8 μm-100 μm;

[0067] Optionally, the angle a in the figure is defined as the angle between the connecting edge 220 and the hypotenuse 230, and the angle a is 10°-80°;

[0068] Optionally, the angle b in the figure is defined as the angle between the connecting edge 220 and the hypotenuse 230 of an adjacent prism portion 200, and the angle b is 10°-80°.

[0069] See also Figure 3 As shown, in some specific implementations of this embodiment, the performance parameters of the optical film 10 are as follows:

[0070]

[0071] See also Figures 1 to 8 As shown, the utility model also provides a display module 1, which includes a light-emitting component, a light-emitting component and an optical film 10 in any one of the above embodiments; the optical film 10 is arranged on the light-emitting side of the light-emitting component; the light-emitting component is arranged on the side of the optical film 10 away from the light-emitting component.

[0072] It can be understood that, in the display module 1 of the present embodiment, by setting the optical film 10 in any one of the above-mentioned embodiments, the optical film 10 of the present embodiment sets the platform surface 210 on the prism part 200, which can improve the deflection rate of light to achieve light emission at a specific viewing angle compared to the traditional optical film 10, thereby improving the light collecting effect of the display module 1 to improve the brightness of the display module 1.

[0073] Furthermore, the display module 1 further includes a brightness enhancement film 40 , and the brightness enhancement film 40 is at least partially disposed between the optical film 10 and the light-emitting component.

[0074] Specifically, the number of the brightness enhancement film 40 can be one layer or two layers. When the number of the brightness enhancement film 40 is two layers, the two layers of the brightness enhancement film 40 can be stacked, thereby further improving the brightness of the display module 1.

[0075] Specifically, the number of brightness enhancing films 40 and the number of optical films 10 are both two, and one of the optical films 10 and one of the brightness enhancing films 40 are connected and arranged in the same plane, and the other optical film 10 and another brightness enhancing film 40 are connected and arranged in the same plane, wherein, on the projection surface of the light-emitting component, one of the optical films 10 and another of the brightness enhancing films 40 are overlapped, and one of the brightness enhancing films 40 and another of the optical films 10 are overlapped.

[0076] In this embodiment, by staggeredly arranging the brightness enhancement films 40 and the optical films 10 , the refraction and scattering uniformity of the light in the display module 1 can be effectively improved, thereby improving the light output effect of the display module 1 .

[0077] Specifically, the prism part 200 is located at a side close to or far from the brightness enhancement film 40 .

[0078] It can be understood that when the prism portion 200 is located on a side close to the brightness enhancing film 40, by providing a platform surface 210 on the prism portion 200, the optical film 10 can be prevented from scratching the brightness enhancing film 40 while ensuring the light collecting effect of the optical film 10; when the prism portion 200 is provided on a side away from the brightness enhancing film 40, the anti-scratch effect of the optical film 10 can also be achieved.

[0079] Furthermore, the number of the optical films 10 is at least two, and the two layers of optical films 10 are stacked.

[0080] In this embodiment, by providing two layers of optical films 10 , the display brightness of the display module 1 can be further improved, and the use effect is good.

[0081] In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0082] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0083] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0084] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. An optical film, characterized in that: include: membrane body; as well as A prism portion, wherein the number of the prism portions is multiple, and the multiple prism portions are sequentially arranged along one side of the film body, and the prism portion is used to refract the output light of the film body; wherein the prism portion is provided with a platform surface, and the platform surface is connected to another adjacent prism portion.

2. The optical film according to claim 1, characterized in that: The prism portion has a connecting edge and a hypotenuse, the hypotenuse, the platform surface and the connecting edge are connected in sequence, and the platform surface is arranged in contact with the film body, the width of the platform surface is T, and the distance between two adjacent prism portions is P, wherein: T / (P+T)≤1 / 3.

3. The optical film according to claim 2, characterized in that: The optical film further comprises an optical filler, and the optical filler is filled in an open space enclosed by the bevel, the platform surface and the connecting edge.

4. The optical film according to claim 3, characterized in that: The optical filler includes a first filler and a second filler, the first filler is arranged on the inner side of the second filler, and the refractive index of the first filler is smaller than the refractive index of the second filler.

5. The optical film according to any one of claims 2 to 4, characterized in that: The optical film further includes any one of the following: Optionally, the width of the platform surface is 3 μm-35 μm; Optionally, the height of the connecting edge is 4 μm-80 μm; Optionally, the distance between two adjacent prism portions is 8 μm-100 μm; Optionally, the angle between the connecting edge and the hypotenuse is 10°-80°; Optionally, the angle between the connecting edge and the hypotenuse of an adjacent prism portion is 10°-80°.

6. The optical film according to claim 1, characterized in that: The prism portion has a connecting edge and a hypotenuse, the hypotenuse, the platform surface and the connecting edge are connected in sequence, and the platform surface is spaced apart from the membrane body, the width of the platform surface is T, and the distance between two adjacent prism portions is P, wherein: T / P≤1 / 3.

7. The optical film according to claim 6, characterized in that: The optical film further includes any one of the following: Optionally, the width of the platform surface is 3 μm-35 μm; Optionally, the height of the connecting edge is 4 μm-80 μm; Optionally, the distance between two adjacent prism portions is 8 μm-100 μm; Optionally, the angle between the connecting edge and the hypotenuse is 10°-80°; Optionally, the angle between the connecting edge and the hypotenuse of an adjacent prism portion is 10°-80°.

8. A display module, characterized in that: include: Light emitting components; The optical film according to any one of claims 1 to 7, wherein the optical film is arranged on the light emitting side of the light emitting component; as well as The light emitting component is arranged on a side of the optical film away from the light emitting component.

9. The display module according to claim 8, characterized in that: The display module further comprises a brightness enhancement film, and the brightness enhancement film is at least partially disposed between the optical film and the light-emitting component.

10. The display module according to claim 9, characterized in that: There are two brightness enhancing films and two optical films, and one of the optical films is connected to one of the brightness enhancing films and is located on the same plane, and the other optical film is connected to another brightness enhancing film and is located on the same plane, wherein on the projection surface of the light-emitting component, one of the optical films is overlapped with another brightness enhancing film, and one of the brightness enhancing films is overlapped with another optical film.

11. The display module according to claim 9, characterized in that: The prism portion is located at a side close to or far away from the brightness enhancement film.

12. The display module according to claim 8, characterized in that: The number of the optical films is at least two, and the two layers of the optical films are stacked.

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