Display enhancement film and display device

Abstract

The present invention discloses a display synergistic film and a display device, wherein the display synergistic film comprises a substrate structure layer, a first light guide layer and a second light guide layer. The first light guide layer is formed on the substrate structure layer and has a plurality of light guide structures extending in strips and arranged at intervals, and the light guide structure has two side surfaces extending along its length direction, and the side surfaces are arc-shaped surfaces. The second light guide layer is formed on the first light guide layer and fills the first light guide layer, and the refractive index of the first light guide layer and the second light guide layer are different. The display synergistic film of the present invention can enhance the light intensity, contrast, chromaticity, etc. of the screen of the display device in the full angle range, expand the viewing angle, and has a simple structure and is easy to produce.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display efficiency enhancement film and a display device. Background Art

[0002] With the development of science and technology, the market has higher and higher requirements for screen display products, such as requiring screen display products to have ultra-high resolution, etc., and wide-angle optical film has become the standard for high-resolution screens because it can significantly expand the viewing angle. However, the existing wide-angle optical film production requirements are very high and the production difficulty is relatively large. The current domestic technology or general manufacturers cannot produce high-quality wide-angle optical films. Therefore, inventing an optical film with lower production difficulty and better viewing angle expansion effect has become an urgent problem to be solved.

[0003] The above contents are only used to assist in understanding the technical solution of the invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The main purpose of the present invention is to provide a display enhancement film, aiming to solve the technical problem that some existing optical films have poor viewing angle expansion effect.

[0005] To achieve the above-mentioned purpose, the display efficiency enhancement film proposed in the present invention comprises a substrate structure layer, a first light guide layer and a second light guide layer. The first light guide layer is formed on the substrate structure layer and has a plurality of light guide structures extending in strips and arranged at intervals, and the light guide structure has two side surfaces extending along its length direction, and the side surfaces are arc-shaped surfaces. The second light guide layer is formed on the first light guide layer and fills the first light guide layer, and the refractive index of the first light guide layer and the second light guide layer are different.

[0006] In one embodiment, the plurality of light guide structures include a first light guide structure, wherein a side surface of the first light guide structure is a concave arc surface and a top surface is a flat surface.

[0007] In one embodiment, the plurality of light guide structures further include a second light guide structure, the side surface of the second light guide structure is a concave arc surface, and the top surface is a curved surface.

[0008] In one embodiment, the top surface of the second light guide structure is a convex arc surface, and the curvature of the convex arc surface is not less than 4 micrometers and not more than 10 micrometers.

[0009] In one embodiment, a distance between the two side surfaces at the top of the light guide structure is smaller than a distance between the two side surfaces at the bottom of the light guide structure.

[0010] In one embodiment, the height of the light-guiding structure is not less than 8 microns and not more than 20 microns; the distance between the two side surfaces at the top of the light-guiding structure is not less than 5 microns and not more than 19 microns, and the distance between the two side surfaces at the bottom of the light-guiding structure is not less than 10 microns and not more than 35 microns.

[0011] In one embodiment, the plurality of light-guiding structures further include a third light-guiding structure, which is a multi-step trapezoidal structure and includes a first trapezoidal segment, a second trapezoidal segment and a third trapezoidal segment stacked from bottom to top, and a side surface of the second trapezoidal segment is an arc surface.

[0012] In one embodiment, the height of the first trapezoidal segment is not less than 2 microns and not more than 10 microns, and the total height of the second trapezoidal segment and the third trapezoidal segment is not less than 10 microns and not more than 20 microns; and in the cross-section of the light-guiding structure, the base width of the first trapezoidal segment is not less than 15 microns and not more than 22 microns, the base width of the second trapezoidal segment is not less than 10 microns and not more than 21 microns, and the base width of the third trapezoidal segment is not less than 5 microns and not more than 19 microns.

[0013] In one embodiment, the height of the first trapezoidal segment is not less than 4 microns and not more than 7 microns, and the total height of the second trapezoidal segment and the third trapezoidal segment is not less than 12 microns and not more than 17 microns; and in the cross-section of the light-guiding structure, the bottom side width of the first trapezoidal segment is not less than 17 microns and not more than 20 microns, the bottom side width of the second trapezoidal segment is not less than 13 microns and not more than 18 microns, and the bottom side width of the third trapezoidal segment is not less than 8 microns and not more than 13 microns.

[0014] In one embodiment, in the arrangement direction of the light guide structures, the center distance between two adjacent light guide structures is not less than 22 micrometers and not more than 28 micrometers.

[0015] In one embodiment, the refractive index of the first light guide layer is greater than the refractive index of the second light guide layer, and the difference between the refractive index of the first light guide layer and the refractive index of the second light guide layer is not less than 0.05 and not more than 0.4.

[0016] In one embodiment, in the arrangement direction of the light guide structures, the center distance between two adjacent light guide structures is not less than 12 micrometers and not more than 50 micrometers.

[0017] In one embodiment, a plurality of the light guide structures are arranged into a circular light guide area, and a plurality of the circular light guide areas are provided on the first light guide layer.

[0018] In one embodiment, a plurality of rows of circular light guiding areas are disposed on the first light guiding layer.

[0019] In one embodiment, the plurality of circular light guiding areas are arranged in an array.

[0020] In one embodiment, the extension direction of the light guide structure is inclined relative to the film edge of the display enhancement film.

[0021] In one embodiment, the first light guide layer and the second light guide layer are both formed of ultraviolet curable resin, and the refractive index of the ultraviolet curable resin is not less than 1.35 and not more than 1.90.

[0022] The present invention further provides a display device, the display device comprising a display synergistic film, the display synergistic film comprising:

[0023] Base material structural layer;

[0024] A first light guide layer is formed on the substrate structure layer and has a plurality of light guide structures extending in strips and arranged at intervals, wherein the light guide structures have two side surfaces extending along the length direction thereof, and the side surfaces are arc-shaped surfaces; and

[0025] The second light guide layer is formed on the first light guide layer and fills the first light guide layer. The refractive index of the first light guide layer is different from that of the second light guide layer.

[0026] The display synergistic film of the present invention sets the side of the light guide structure as an arc surface. When the light emitted by the light source passes through the light guide structure on the first light guide layer, the light incident on the arc surface can be refracted at various angles, so that the light intensity, contrast, chromaticity, etc. of the screen of the display device are enhanced in the full angle range, which not only expands the viewing angle, but also eliminates color deviation and increases the display frequency domain. In addition, the display synergistic film of the present invention has a relatively simple structure, is easy to produce, and has a low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0028] Figure 1 It is a schematic structural diagram showing an embodiment of a synergistic film of the present invention;

[0029] Figure 2 It is a schematic structural diagram of an embodiment of the first light guide layer of the display efficiency enhancement film of the present invention;

[0030] Figure 3 It is a schematic structural diagram of another embodiment of the first light guide layer of the display efficiency enhancement film of the present invention;

[0031] Figure 4 It is a structural schematic diagram of another embodiment of the first light guide layer of the display efficiency enhancement film of the present invention;

[0032] Figure 5 It is a schematic diagram of the arrangement of a light guide structure of a display efficiency enhancement film according to an embodiment of the present invention;

[0033] Figure 6 It is a schematic diagram of the arrangement of another embodiment of the light guide structure of the display efficiency enhancement film of the present invention;

[0034] Figure 7 It is a structural schematic diagram of an embodiment of a circular light-guiding area in a display synergistic film of the present invention;

[0035] Figure 8 It is a schematic structural diagram of another embodiment of a circular light-guiding region in a display synergistic film of the present invention;

[0036] Fig. 9 The simulation data diagram of the synergistic film of the present invention is shown;

[0037] Fig.10 This is a comparison chart showing the simulation data and experimental data of the synergistic membrane of the present invention.

[0038] Description of Figure Numbers:

[0039] Label name Label name Label name 10 Display enhancement film 32 The first light guide structure 342 Second trapezoidal segment 20 Base material structure layer 33 Second light guide structure 343 The third ladder segment 30 First light guide layer 34 The third light guide structure 40 Second light guide layer 31 Light guide structure 341 The first ladder segment 50 Circular light guide area

[0040] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0041] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0043] The present invention provides a display synergy enhancing film.

[0044] In the embodiment of the present invention, Figure 1 As shown, the display efficiency enhancement film 10 includes a substrate structure layer 20, a first light guide layer 30 and a second light guide layer 40. The substrate structure layer 20 is used to support and protect the first light guide layer 30. The substrate structure layer 20 itself can guide light. The material thereof can be PET (Polyethylene terephthalate), PC (Polycarbonate), PMMA (polymethyl methacrylate), PEN (Polyethylene naphthalate two formic acid glycol ester), COP (Coefficient Of Performance), COC (copolymers of cycloolefin), TAC (Triacetyl Cellulose), LR-TAC (L-TAC), etc. ow reflective Triacetyl Cellulose, triacetate cellulose film), AR-TAC (A nti reflective TriacetylCellulose, triacetyl cellulose membrane ) Or glass, optical devices, etc. containing a low-reflection or anti-reflection layer are directly used as the substrate structure layer 20.

[0045] It should also be noted that when producing the display enhancement film 10 of the present invention, it can be equipped with a separate substrate structure layer 20 for production, or some optical devices existing in the display device can be used as the substrate structure layer 20, such as polarizers, brightness enhancement films, diffusion films, etc. generally installed in the display device, which can be directly used as substrates and then produced together with the display device.

[0046] The first light guide layer 30 is formed on the substrate structure layer 20. The first light guide layer 30 can be made of an ultraviolet curing resin with a refractive index of not less than 1.35 and not more than 1.90, such as a refractive index of 1.35, 1.40, 1.45, 1.50, 1.55, 1.60, 1.65, 1.70, 1.80, 1.85, 1.90, etc. The first light guide layer 30 is a key structural layer of the display enhancement film 10 of the present invention. Specifically, in this embodiment, taking the display enhancement film 10 in a horizontal state as an example (the same below), the first light guide layer 30 has a plurality of light guide structures 31 extending in strips and arranged at intervals. The light guide structures 31 protrude upward from the upper surface of the substrate structure layer 20. The extension length, interval size, etc. of the light guide structures 31 can be determined according to the required size and thickness of the display enhancement film 10. The light-guiding structure 31 has two side surfaces extending along its length direction, and the side surfaces are arc-shaped surfaces, which can be concave arc surfaces or convex arc surfaces. The curvature of the arc-shaped surface can be appropriately determined according to the overall size of the light-guiding structure 31, and no specific limitation is made here. The specific value can be determined by the production technology, cost and other comprehensive factors.

[0047] It can be understood that when the light emitted by the light source passes through the light guiding structure 31 on the first light guiding layer 30, since the side of the light guiding structure 31 is a curved surface, the light incident on the curved surface can be refracted at various angles, so that the light intensity, contrast, chromaticity, etc. of the screen of the display device are enhanced within the full angle range, which not only expands the viewing angle, but also eliminates color deviation and increases the display frequency domain.

[0048] The refraction of light by the curved surface may cause the light intensity, chromaticity, contrast, etc. of the display screen at a normal viewing angle to be weakened. Therefore, in order to avoid a significant weakening of the light intensity, chromaticity, contrast, etc. of the display screen at a normal viewing angle, in one embodiment, Figure 2 As shown, the multiple light guide structures 31 include a first light guide structure 32, the side of the first light guide structure 32 is a concave arc surface, and the top surface is a plane. It can be understood that when the light passes through the first light guide structure 32, part of the light can be refracted to various angles through the side of the first light guide structure 32, thereby diffusing the light within the full angle range. The other part of the light can be directly emitted through the top surface of the first light guide structure 32 without refraction, effectively avoiding the situation where the light intensity, chromaticity, contrast, etc. at the normal viewing angle are greatly weakened.

[0049] Of course, the size of the gaps between the light guide structures 31 can be adjusted so that the light can be emitted directly from the gaps between the light guide structures 31, thereby ensuring the display effect of the display screen at a normal viewing angle.

[0050] In another embodiment, the plurality of light guide structures 31 further include a second light guide structure 33, the side surface of the second light guide structure 33 is a concave arc surface, and the top surface is an arc surface, which can be a convex arc surface or a concave arc surface. It should be noted that the curvature of the top surface should not be too large when it is an arc surface. A top surface with a little curvature will not have a great impact on the function of the light guide structure 31, but will bring some performance improvements.

[0051] For example, in one embodiment, Figure 3 As shown in the figure, the top surface of the second light guide structure 33 is a convex curved surface, and the curvature R of the convex curved surface is not less than 4 microns and not more than 10 microns. Specifically, R can be 4 microns, 5 microns, 6 microns, 8 microns, 10 microns, etc. Among them, the center of the convex curved surface is located on the midline of the bottom surface of the second light guide structure 33. As shown in Table 1 below, when the display efficiency enhancement film 10 with the second light guide structure 33 is applied to the display screen, the light intensity attenuation of the display screen at a normal viewing angle is less than 15%. Compared with the normal viewing light intensity at angles of ±30° and ±35°, the light intensity ratio is greater than 80%. Compared with the normal viewing light intensity at angles of ±60° and ±65°, the light intensity ratio is greater than 40%. And compared with the contrast light intensity at angles of ±30° and ±35°, the contrast light intensity ratio is greater than 85%. That is, while enhancing the display effect of other viewing angles of the display screen, it is ensured that the display effect of the normal viewing angle will not be greatly attenuated.

[0052]

[0053] Table 1: Performance test data showing the synergistic membrane of the present invention.

[0054] The second light guide layer 40 is formed on the first light guide layer 30 and fills the first light guide layer 30, and the second light guide layer 40 also protects the first light guide layer 30. The second light guide layer 40 can also be made of a UV curable resin with a refractive index of not less than 1.35 and not more than 1.90, such as a refractive index of 1.35, 1.40, 1.45, 1.50, 1.55, 1.60, 1.65, 1.70, 1.80, 1.85, 1.90, etc. However, the refractive indexes of the first light guide layer 30 and the second light guide layer 40 need to be set differently to prevent the first light guide layer and the second light guide layer from being integrated, thereby affecting the performance of the display enhancement film 10.

[0055] In addition, the second light guide layer 40 can also form an anti-glare structure layer through a corresponding chemical process while filling the first light guide layer 30, so that the display efficiency enhancement film 10 also has an anti-glare function. It can also be directly made into a mirror-like bright structure, or the second light guide layer 40 can be processed accordingly according to other functions that need to be realized, as long as it does not affect the light diffusion of the first light guide layer 30.

[0056] At the same time, the structure of the display enhancement film 10 of the present invention is relatively simple, which greatly reduces the difficulty of production and the production cost. In specific production, it is only necessary to make a corresponding texture roller according to the shape of the required light guide structure 31 and perform UV roll-to-roll embossing. Specifically, the display enhancement film 10 of the present invention can be produced according to the following process steps:

[0057] S1: providing a corresponding texture roller according to the specific shape of the light guide structure 31;

[0058] The shape of the light-guiding structure to be produced can be determined according to actual needs (for example, a multi-step ladder-shaped structure), and corresponding molds, texture rollers, etc. can be made according to the determined shape of the light-guiding structure to prepare for production in subsequent steps.

[0059] S2: Using TrichloroSilane material and CVD technology to perform anti-sticking and surface passivation treatment on the texture roller;

[0060] It should be noted that in order to make the surface flatness of the produced light guide structure 31 reach the optical level, the texture roller can be subjected to special anti-sticking and surface passivation treatment before embossing, that is, the surface of the texture roller is treated by using TrichloroSilane (trichlorosilane) material and CVD (chemical vapor deposition) process.

[0061] S3: rolling the film material with the texture roller to obtain a mother film;

[0062] S4: using the master film as a mold, performing UV roll-to-roll nanoimprinting to obtain a first-generation master film;

[0063] S5: using the first generation mother film as a mold, and performing UV roll-to-roll nanoimprinting to obtain the first light guide layer;

[0064] It should be noted that due to the high aspect ratio of the produced structure, the first-generation mother film (soft mold) needs to be pre-coated before nanoimprinting, that is, the micro-nano structure in the first-generation mother film is filled with UV resin after being coated with an anilox roller to obtain the first light guide layer 30, and then it is imprinted together with the substrate.

[0065] S6: forming the second light guide layer 40 on the first light guide layer 30 by UV embossing;

[0066] In this step, the second light guide layer 40 can be processed accordingly as needed, for example, the second light guide layer can be processed to form an AG (Anti-Glare Glass) anti-glare structure, a mirror-like bright structure, a special-shaped special optical function structure, etc.

[0067] S7: Laminating with protective film and die-cutting the finished product.

[0068] Therefore, the display efficiency enhancement film 10 of the present invention not only enhances the light intensity, contrast, chromaticity, etc. of the screen of the display device in the full angle range, thereby expanding the viewing angle, eliminating color deviation and increasing the display frequency domain, but also has a simple structure, is easy to produce, and has a low cost.

[0069] In one embodiment, if Figure 2 or Figure 3 As shown, in order to allow light to be refracted from the curved surface on the light guide structure 31, the distance between the two side surfaces at the top of the light guide structure 31 is smaller than the distance between the two side surfaces at the bottom of the light guide structure 31. That is, the light guide structure 31 is approximately a trapezoidal structure, so that the two side surfaces of the light guide structure 31 are relatively inclined, thereby refracting more light and enhancing the display effect of the display screen in a full angle range.

[0070] The distance L1 between the two side surfaces at the top of the light guide structure 31 is not less than 5 microns and not more than 19 microns, and can be 5 microns, 9 microns, 15 microns, 19 microns, etc. The distance L2 between the two side surfaces at the bottom of the light guide structure 31 is not less than 10 microns and not more than 35 microns, for example, L2 is 10 microns, 15 microns, 20 microns, 30 microns, 35 microns, etc. The height H of the light guide structure 31 is not less than 8 microns and not more than 20 microns, and can be 8 microns, 12 microns, 16 microns, 20 microns, etc.

[0071] As shown in the test statistics table in Table 1, the light guide structure 31 with this size range can make the light intensity attenuation of the display screen at the normal viewing angle less than 15%. The light intensity at the angles of ±30° and ±35° is greater than 80% compared with the normal viewing light intensity. The light intensity at the angles of ±60° and ±65° is greater than 40% compared with the normal viewing light intensity. And the contrast light intensity at the angles of ±30° and ±35° is greater than 85% compared with the normal viewing contrast light intensity.

[0072] It should be noted that when the top surface of the light-guiding structure 31 is a plane, "the spacing at the top of the light-guiding structure 31" refers to the width of the plane; and when the top surface of the light-guiding structure 31 is a curved surface, "the spacing at the top of the light-guiding structure 31" refers to the spacing between the intersection lines of the curved surface and the two side surfaces (the same below).

[0073] Similarly, when the top surface of the light guide structure 31 is a plane, "the height of the light guide structure 31" refers to the average distance between the plane and the bottom surface. When the top surface of the light guide structure 31 is a plane and the plane has a certain inclination angle, "the height of the light guide structure 31" refers to the maximum distance between the plane and the bottom surface. When the top surface of the light guide structure 31 is a curved surface, "the height of the light guide structure 31" refers to the distance between the intersection of the curved surface on the two side surfaces and the bottom surface (the same below).

[0074] In one embodiment, if Figure 4 As shown, the multiple light-guiding structures 31 also include a third light-guiding structure 34, which is a multi-step trapezoidal structure and includes a first trapezoidal segment 341, a second trapezoidal segment 342 and a third trapezoidal segment 343 stacked from bottom to top, and the side surface of the second trapezoidal segment 342 is an arc surface, which is a concave arc surface.

[0075] The height H1 of the first trapezoidal segment 341 is not less than 2 microns and not more than 10 microns, for example, it can be 2 microns, 4 microns, 6 microns, 8 microns, 10 microns, etc. The total height H2 of the second trapezoidal segment 342 and the third trapezoidal segment 343 is not less than 10 microns and not more than 20 microns, that is, H2 can be 10 microns, 12 microns, 14 microns, 16 microns, 18 microns, 20 microns, etc.

[0076] In the cross section of the light guide structure 31, the bottom width L3 of the first trapezoidal segment 341 is not less than 15 microns and not more than 22 microns, for example, it can be 15 microns, 17 microns, 20 microns, 22 microns, etc. The bottom width L4 of the second trapezoidal segment 342 is not less than 10 microns and not more than 21 microns, that is, L4 can be 10 microns, 12 microns, 15 microns, 18 microns, 21 microns, etc. The bottom width L5 of the third trapezoidal segment 343 is not less than 5 microns and not more than 19 microns, and can be 5 microns, 7 microns, 10 microns, 14 microns, 19 microns, etc.

[0077] As shown in the test statistics table in Table 1, the light-guiding structure 31 with the above size range can make the light intensity attenuation of the display screen at the normal viewing angle less than 15%. The light intensity ratio at the angles of ±30° and ±35° is greater than 80% compared with the normal viewing light intensity. The light intensity ratio at the angles of ±60° and ±65° is greater than 40% compared with the normal viewing light intensity. And the contrast light intensity ratio at the angles of ±30° and ±35° is greater than 85% compared with the normal viewing contrast light intensity. This enables viewers to obtain a more vivid and bright viewing experience within the full angle range of the display screen.

[0078] In another embodiment, the height H1 of the first trapezoidal segment 341 is not less than 4 microns and not more than 7 microns, that is, H1 can be 4 microns, 5.5 microns, 6 microns, 7 microns, etc. The total height H2 of the second trapezoidal segment 342 and the third trapezoidal segment 343 is not less than 12 microns and not more than 17 microns, for example, H2 is 12 microns, 13.5 microns, 15 microns, 17 microns, etc. And in the cross section of the light guide structure 31, the bottom width L3 of the first trapezoidal segment 341 is not less than 17 microns and not more than 20 microns, the bottom width L4 of the second trapezoidal segment 342 is not less than 13 microns and not more than 18 microns, and the bottom width L5 of the third trapezoidal segment 343 is not less than 8 microns and not more than 13 microns. And on the basis of the light guide structure 31 with the above size range, when the center distance P1 of two adjacent light guide structures 31 in the arrangement direction of the light guide structure 31 is not less than 22 microns and not more than 28 microns, the synergistic effect can achieve a better effect. Among them, P1 can be 22 microns, 24 microns, 26 microns, 28 microns, etc., and the specific setting can be based on actual conditions.

[0079] In one embodiment, if Fig. 9 As shown, after simulation, when the refractive index of the first light guide layer 30 is greater than the refractive index of the second light guide layer 40, and the difference δn between the refractive index of the first light guide layer 30 and the refractive index of the second light guide layer 40 is not less than 0.05 and not greater than 0.4, the synergistic effect of the synergistic film 10 is better. Specifically, the difference δn can be 0.05, 0.1, 0.13, 0.135, 0.14, 0.145, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, etc.

[0080] And if Fig.10 As shown in the figure, the figure shows theoretical simulation data with and without the display synergistic film 10 and experimental data of a real experiment. It can be seen from the figure that the experimental data and the simulation data are in good agreement, that is, the display synergistic film 10 of the present invention achieves the expected synergistic effect in actual application.

[0081] In one embodiment, if Figure 2 , Figure 3 and Figure 5 As shown, in the arrangement direction of the light-guiding structure 31, the center distance P2 of two adjacent light-guiding structures 31 is not less than 12 microns and not more than 50 microns, for example, it can be 12 microns, 25 microns, 35 microns, 50 microns, etc., and can be specifically set according to the required size of the display enhancement film 10.

[0082] In one embodiment, if Figure 7 and Figure 8As shown, the plurality of light guide structures 31 are arranged into a circular light guide area 50. The first light guide layer 30 is provided with a plurality of circular light guide areas 50. The plurality of circular light guide areas 50 can be arranged in a plurality of rows. The plurality of rows of circular light guide areas 50 can be staggered, for example, staggered in the column direction. Of course, the plurality of circular light guide areas 50 can also be arranged in an array, so that the display efficiency enhancement film 10 is easier to produce.

[0083] It can be understood that when multiple light-guiding structures 31 are arranged into a circular light-guiding area 50, not only can the light be diffused from the circular light-guiding area 50 to the full angle range, but other light can also be directly emitted from the gaps between the circular light-guiding areas 50, thereby improving the display effect of the display screen at other angles while ensuring the display effect at the normal viewing angle and avoiding a significant attenuation of light intensity, contrast, chromaticity, etc. at the normal viewing angle.

[0084] In one embodiment, if Figure 6 As shown, the extending direction of the light guide structure 31 is inclined relative to the film edge of the display synergistic film 10. For example, taking the display synergistic film 10 as a regular directional film, the extending direction of the light guide structure 31 can be inclined relative to the film edge of the display synergistic film 10 according to the size of the display screen or display device used, and the inclination angle is not limited here, and can be 4°, 8°, 15°, 17°, etc., and can be set according to actual conditions.

[0085] The present invention further provides a display device, which includes a display enhancement film 10. The specific structure of the display enhancement film 10 refers to the above embodiment. Since the display device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0086] Among them, the display device can be a TFT-LCD display (Thin film transistor liquid crystal display), an LED (Light Emitting Diode) display, an OLED (Organic Light-Emitting Diode) display, a CRT (Cathode Ray Tube) display, a 3D display, a quantum dot display, a TN (Twisted Nematic) display, a touch screen, etc. The resolution of the display device is not limited. The display enhancement film 10 of the present invention can be applied to displays with all resolutions ranging from 4K to 8K.

[0087] The assembly position of the display enhancement film 10 in the display device is not limited, and generally needs to be assembled in the direction of light emission. For example, in one embodiment, the display device includes a front cover plate and a display module, and the display enhancement film 10 can be directly attached to the front cover plate (that is, directly attached to the screen), or assembled between the display module and the front cover plate, and can be assembled according to specific needs.

[0088] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A display synergistic film, characterized in that: include: Base material structural layer; a first light guide layer, formed on the substrate structure layer and having a plurality of light guide structures extending in strips and arranged at intervals, the light guide structure having two side surfaces extending along its length direction, the side surfaces being arc-shaped surfaces, the plurality of light guide structures comprising a first light guide structure, a second light guide structure and a third light guide structure arranged at intervals along the length direction of the first light guide layer, the side surface of the first light guide structure being a concave arc surface and the top surface being a plane, the side surface of the second light guide structure being a concave arc surface and the top surface being an arc-shaped surface, the third light guide structure being a multi-step trapezoidal structure and comprising a first trapezoidal segment, a second trapezoidal segment and a third trapezoidal segment stacked from bottom to top, the side surface of the second trapezoidal segment being an arc-shaped surface; and, A second light guide layer is formed on the first light guide layer and fills the first light guide layer. The refractive index of the first light guide layer is different from that of the second light guide layer. The refractive index of the first light guide layer is greater than that of the second light guide layer. The difference δn between the refractive index of the first light guide layer and the refractive index of the second light guide layer is not less than 0.05 and not greater than 0.

4.

2. The display efficiency enhancement film according to claim 1, characterized in that: The distance between the two side surfaces at the top of the light guide structure is smaller than the distance between the two side surfaces at the bottom of the light guide structure.

3. The display synergy enhancing film according to claim 2, characterized in that: The height of the light guide structure is not less than 8 microns and not more than 20 microns; The distance between the two side surfaces at the top of the light-guiding structure is not less than 5 micrometers and not more than 19 micrometers, and the distance between the two side surfaces at the bottom of the light-guiding structure is not less than 10 micrometers and not more than 35 micrometers.

4. The display efficiency enhancement film according to claim 1, characterized in that: The height of the first trapezoidal segment is not less than 4 micrometers and not more than 7 micrometers, and the total height of the second trapezoidal segment and the third trapezoidal segment is not less than 12 micrometers and not more than 17 micrometers; And in the cross-section of the light-guiding structure, the bottom width of the first trapezoidal segment is not less than 17 microns and not more than 20 microns, the bottom width of the second trapezoidal segment is not less than 13 microns and not more than 18 microns, and the bottom width of the third trapezoidal segment is not less than 8 microns and not more than 13 microns.

5. The display synergy enhancing film according to claim 4, characterized in that: In the arrangement direction of the light guide structures, the center distance between two adjacent light guide structures is not less than 22 micrometers and not more than 28 micrometers.

6. The display synergy enhancing film according to claim 5, characterized in that: The first light guide layer and the second light guide layer are both formed of ultraviolet curing resin, and the refractive index of the ultraviolet curing resin is not less than 1.35 and not more than 1.

90.

7. The display synergy enhancing film according to any one of claims 1 to 6, characterized in that: The plurality of light guide structures are arranged into a circular light guide area, and the first light guide layer is provided with a plurality of the circular light guide areas; The first light guide layer is provided with a plurality of rows of the circular light guide areas, and / or the plurality of circular light guide areas are arranged in an array.

8. A display device, characterized in that: The invention comprises the display efficiency enhancing film as claimed in any one of claims 1 to 7.

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