Backlight dual view film

Abstract

The utility model provides a kind of backlight double-view film, including the base material layer of PET material and the prism function layer of several numbers prisms composition. The base material layer used is PET material, and it is transparent and high in strength, which is conducive to improving the strength of the composite film without affecting the observation effect of the double-view film, and facilitates use and storage. The prism cross section used in the prism function layer has an isosceles triangle structure, which not only meets the double-view effect, but also has good stability. In addition, the UV soft rubber material design of the prism function layer not only has a moisture-resistant effect, but also has the advantage of anti-UV aging, which is conducive to prolonging the service life of the film.

Description

Technical Field

[0001] This utility model relates to the field of optical film technology, and more specifically to a backlight dual-view film. Background Technology

[0002] With the continuous development of electronic science and technology and the relocation of the flat panel display industry to China, the domestic demand for optical films continues to rise. An optical film is an optical medium material composed of thin, layered media, uniformly attached to the surface of an optical device. Depending on its function, optical films can be classified into reflective films, polarizers, diffuser films, brightness enhancement films, and filters, among others. With the continuous development of optical films, dual-view films have occupied a very important position.

[0003] Dual-viewing angle refers to a method or technique for observing and analyzing the same object or phenomenon from two different angles or dimensions. Similarly, a dual-viewing angle film allows for observation of an object with the film applied from two different angles, enabling further perception of the object's actual condition. Generally, dual-viewing angle films need to meet the backlight performance requirements of modern displays. Backlighting is an indispensable light source technology in modern displays, primarily used to illuminate the screen and ensure content visibility. Its core principle is to enhance the display effect by illuminating the screen from behind or the side using a specific light source.

[0004] While existing single-layer dual-view films can be directly bonded to objects for use, their strength is low and they are not easy to store. Moreover, to ensure observation results, most existing dual-view films are made of polypropylene, which may absorb moisture and expand under certain humidity conditions, seriously affecting long-term performance and lifespan.

[0005] In view of this, it is necessary to invent a backlight dual-view film. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a backlit dual-view film. The substrate layer is made of PET material, which is light-transmitting and has high strength. Without affecting the observation effect of the dual-view film, it helps to improve the strength of the composite film and facilitates its use and storage. The prism functional layer not only satisfies the dual-view effect, but also has the advantages of moisture resistance and UV aging resistance, which helps to extend the service life of the film.

[0007] To solve the above-mentioned technical problems, the purpose of this utility model is achieved as follows:

[0008] A backlight dual-view film includes a substrate layer and a prism functional layer disposed on the substrate layer;

[0009] The prism functional layer includes a number of prisms of the same size; and a spacer is provided between two adjacent prisms.

[0010] The prism includes two inclined planes and a vertex between the two inclined planes, and the cross-section of the prism is an isosceles triangle.

[0011] Based on the above scheme and as a preferred embodiment of the above scheme, the prism is made of UV soft rubber with a refractive index of 1.54-1.58.

[0012] Based on the above scheme and as a preferred embodiment of the above scheme, the apex angle of the prism is 61°-63°, which is beneficial to the realization of the dual-view effect of the prism functional layer, and the length L of the spacing band between two adjacent prisms is 0.022-0.026mm.

[0013] Based on the above scheme and as a preferred embodiment of the above scheme, the width of the prism is 22-26 μm.

[0014] Based on the above scheme and as a preferred embodiment of the above scheme, the number of prisms is 5-200.

[0015] Based on the above scheme and as a preferred embodiment of the above scheme, the substrate layer is made of PET with a refractive index of 1.60-1.62.

[0016] Based on the above scheme and as a preferred embodiment of the above scheme, the thickness of the substrate layer is 0.23-0.27mm. If the substrate layer is too thick, it will affect the user's observation clarity, and will also consume light energy and affect light propagation; if the substrate layer is too thin, it will not meet the mechanical weather resistance requirements for use, affecting storage and transportation.

[0017] Based on the above scheme and as a preferred embodiment of the above scheme, the outer surface of the spacer strip away from the substrate layer is provided with a series of continuous small raised curved surfaces.

[0018] Based on the above scheme and as a preferred embodiment of the above scheme, the height of the raised small curved surface is 0.15-0.35um.

[0019] Based on the above scheme and as a preferred embodiment of the above scheme, the observation angle α of the dual-view film is 0-130°.

[0020] Compared with the prior art, the beneficial effects of this utility model's technical solution are:

[0021] This invention provides a backlit dual-view film, comprising a PET substrate layer and a prism functional layer composed of a plurality of prisms. The substrate layer is made of PET, which is transparent and has high strength. Without affecting the observation effect of the dual-view film, it helps to improve the strength of the composite film and facilitates its use and storage. The prisms used in the prism functional layer have isosceles triangular cross-sections, which not only satisfy the dual-view effect but also have good stability. Furthermore, the UV-resistant soft adhesive material design of the prism functional layer not only provides moisture resistance but also resists ultraviolet aging, thus extending the film's lifespan. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the cross-sectional structure of the prism of this utility model;

[0025] Figure 3 for Figure 1 A schematic diagram of the enlarged structure of A in the middle.

[0026] In the figure, 1-substrate layer; 2-prism functional layer; 21-prism; 22-spacer strip; 211-sloping surface; 212-apex corner; 221-protruding small curved surface. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example 1

[0029] like Figure 1-2 As shown, a backlight dual-view film includes a substrate layer 1 and a prism functional layer 2 disposed on the substrate layer 1; the prism functional layer 2 includes a plurality of prisms 21 of the same size; and a spacer strip 22 is provided between two adjacent prisms 21; the prism 21 includes two inclined surfaces 211 and a vertex angle 212 between the two inclined surfaces 211, and the cross section of the prism 21 is an isosceles triangle.

[0030] Specifically, the prism 21 is made of UV-resistant soft rubber with a refractive index of 1.54-1.58. To maximize the moisture resistance and weather resistance of the prism functional layer 2, a UV-resistant soft rubber with a refractive index of 1.54-1.58 was selected for the design. Preferably, its refractive index is 1.56. Furthermore, the number of prisms 21 is 5-200. In this embodiment, 100 prisms 21 are preferred. During use, the UV-resistant soft rubber material of the prisms 21 provides excellent moisture resistance and also resists UV aging.

[0031] Furthermore, the apex angle 212 of the prism 21 is 61°-63°, preferably 62° in this embodiment. Therefore, the base angle formed by the inclined surface 211 and the outer surface of the substrate layer 1 is 59°. While this angle design does not achieve the refractive effect of an isosceles right-angled triangular total internal reflection prism, the maximum sharp angle design within the limit range not only provides strong refractive power but also greater adaptability. If the apex angle 212 is directly designed as a 90° isosceles right-angled triangle, the application range of this dual-view cornea will be significantly limited; if the apex angle 212 is small, the dual-view effect will not be achieved. Furthermore, the length L of the spacing strip 22 between two adjacent prisms 21 is 0.022-0.026 mm. Preferably, the length L of the spacer 22 in this embodiment is 0.024 mm. The design of the spacer 22 has several advantages. First, it reduces the amount of raw materials used, saving costs. Second, the spacer structure facilitates storage. Third, when a parallel beam of light or a line of sight passes through from a certain angle, the design of a continuous, uninterrupted prism 21 will block the refraction or transmission of light from adjacent inclined surfaces 211 due to the presence of the inclined surfaces 211, causing visual errors. The design of the spacer 22 can avoid this problem and ensure that the structure of a prism 21, i.e., the refracted light or viewing angle, can be seen completely at the same angle.

[0032] Furthermore, the width of the prism 21 is 22-26 μm. Preferably, the width of the prism 21 in this embodiment is 24 μm. The isosceles triangular design of the prism 21, with straight lines on the inclined surface 211 to prevent jitter, can improve the luminance of the light source passing through the viewing angle from the center of the prism, enhance the visual focus of the viewing angle within a certain angle range, and make the luminance perceived by the user more concentrated, the image clearer, and the three-dimensional effect stronger when viewing within the viewing angle range.

[0033] Furthermore, the substrate layer 1 is made of PET with a refractive index of 1.60-1.62, preferably 1.61 in this embodiment. It should be noted that the substrate layer 1 is transparent, so that while enhancing the overall mechanical strength of the dual-view film, it does not affect the viewing range and angle of the dual-view film. Furthermore, the thickness of the substrate layer 1 is 0.23-0.27 mm. If the substrate layer 1 is too thick, it will affect the user's viewing clarity, and will also lose light energy and affect light propagation; if the substrate layer is too thin, it will not meet the required mechanical and weather resistance, affecting storage and transportation. In this embodiment, the thickness of the substrate layer 1 is 0.25 mm.

[0034] In this embodiment, the prism functional layer 2 is bonded to the outer surface of the substrate layer 1 with a transparent adhesive. The transparent adhesive is PET transparent glue, achieving a transparent and traceless bond without affecting the dual-view effect of the prism functional layer 2. It should be noted that the product of this invention is in roll form, with an effective width of not less than 400mm and a length of 30m. The prism functional layer 2 of this invention utilizes the design of prism 21 to primarily provide a dual-view effect. Furthermore, prism 21 is made of UV-resistant soft glue, which not only has moisture resistance but also anti-ultraviolet aging advantages. The use of the substrate layer 1 provides light transmission and high strength, which, without affecting the observation effect of the dual-view film, helps to improve the strength of the composite film and facilitates its use and storage. The dual-view film of this invention was subjected to a temperature shock test according to the test standard GB 150.5A-2009. The environmental conditions were -55℃ to +85℃, humidity above 95%RH, 24 hours / cycle, 10 cycles, and four items were tested: temperature shock, low temperature storage, high temperature storage, and damp heat cycling. The test results showed that the dual-view film of this invention did not have any splattering that significantly affected the visual uniformity after the test items. Defects, dirt spots, bubbles, etc., all met the test requirements, and it has excellent moisture resistance and easy storage characteristics.

[0035] Furthermore, in another embodiment, the outer surface of the spacer band 22 away from the substrate layer 1 is provided with a continuous plurality of raised small curved surfaces 221, which facilitates diffuse reflection of light on the dual-view film, making it easier to observe the object from different directions and allowing the user to see the sample structure and information more clearly. Even further, the height of the raised small curved surfaces 221 is 0.15-0.35 μm. Preferably, in this embodiment, the height of the raised small curved surfaces 221 is 0.25 μm.

[0036] Furthermore, the observation angle α of the dual-view film is 0-130°. From the perspective of dual-view observation angles, the angle on each side is 0-65°. Compared to the isosceles right-angled triangle prism structure, although it lacks the refraction effect of a total internal reflection prism, it still meets the usage requirements. Moreover, this dual-view film structure is applicable to more usage scenarios. During use, if the user's viewing angle is perpendicular to the prism 21, that is, the line of sight falls on the apex 212, the observation angle is 0°; when the user's viewing angle is deflected, such as... Figure 3 As shown, parallel light rays or angles of view pass through the spacer 22 and are diffusely reflected by the raised small curved surface 221, reflecting back to the user's viewpoint, achieving a dual-view effect and allowing for better observation of the object's structure and information. This invention's dual-view film not only provides a dual-view effect, enabling users to better observe and analyze objects from different angles or dimensions, but also features easy storage and moisture resistance, making it suitable for further promotion and use.

[0037] Unless otherwise specified, in this invention, terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe orientation or positional relationships in this invention are for illustrative purposes only and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the accompanying drawings and according to the specific circumstances.

[0038] Unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" in this invention should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A backlight dual-view film, characterized in that, include: Substrate layer (1) and prism functional layer (2) disposed on the substrate layer (1); The prism functional layer (2) includes a number of prisms (21) of the same size; and a spacer (22) is provided between two adjacent prisms (21). The prism (21) includes two inclined planes (211) and a vertex (212) between the two inclined planes (211), and the cross section of the prism (21) is an isosceles triangle.

2. The backlight dual-view film according to claim 1, characterized in that, The prism (21) is made of UV soft rubber with a refractive index of 1.54-1.

58.

3. The backlight dual-view film according to claim 2, characterized in that, The apex angle (212) of the prism (21) is 61°-63°, and the length L of the spacer (22) between two adjacent prisms (21) is 0.022-0.026mm.

4. A backlight dual-view film according to claim 3, characterized in that, The width of the prism (21) is 22-26 μm.

5. A backlight dual-view film according to claim 4, characterized in that, The number of prisms (21) is 5-200.

6. A backlight dual-view film according to claim 1, characterized in that, The substrate layer (1) is made of PET with a refractive index of 1.60-1.

62.

7. A backlight dual-view film according to claim 6, characterized in that, The thickness of the substrate layer (1) is 0.23-0.27 mm.

8. A backlight dual-view film according to claim 1, characterized in that, The outer surface of the spacer band (22) away from the substrate layer (1) is provided with a series of small raised curved surfaces (221).

9. A backlight dual-view film according to claim 8, characterized in that, The height of the raised small curved surface (221) is 0.15-0.35um.

10. The backlight dual-view film according to any one of claims 1-9, characterized in that, The observation angle α of the dual-view membrane is 0-130°.

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