Optical composite film, backlight module and display panel

Abstract

The utility model discloses an optical composite film, a backlight module and a display panel, and relates to the technical field of display. The optical composite film comprises a first base material layer and a second base material layer, the first prism layer is arranged on the first substrate layer; the second base material layer is arranged on the first prism layer far away from one side of the first base material layer; the polaroid is arranged on one side, far away from the first prism layer, of the second substrate layer; and the PSA layer is arranged on one side, far away from the second base material layer, of the polaroid. According to the utility model, the problems that the assembly efficiency is low, the brightness is reduced due to easy scratch, and the backlight module is thicker and the production cost is relatively higher due to the GAP gap formed between the upper diffusion sheet and the lower polaroid in the stacking process because a plurality of frameworks are matched to meet the brightness requirement in the conventional optical film are solved; meanwhile, if a plurality of prism combinations are not matched with diffusion, rainbow lines can appear, the picture taste is poor, and the brightness is reduced due to the fact that the prism combinations are easy to scratch during assembly.

Description

Technical Field

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

[0002] With the advancement of the times, the LCD industry has developed rapidly. Products with higher brightness and relatively lower prices are favored by people. Therefore, the LCD industry is also facing great challenges in product cost control. The backlight materials used in current backlight modules generally use a combination of multiple films (3-film structure, 4-film structure) or composite films (POP, MOP, DOP) with diffusion films.

[0003] Application No. CN200810127579.2 discloses an optical film comprising a substrate and a microstructure layer disposed on a surface of the substrate. The microstructure layer comprises a plurality of columnar structures, each of which comprises at least two types of columnar structures selected from the group consisting of linear columnar structures with peak heights varying along an extension direction, linear columnar structures with peak heights that do not vary along an extension direction, curved columnar structures with peak heights varying along an extension direction, and curved columnar structures with peak heights that do not vary along an extension direction. The optical film of this invention exhibits a light-concentrating effect and effectively reduces optical interference.

[0004] Existing optical films typically use multiple sheets to meet brightness requirements, resulting in low assembly efficiency and prone to scratches, which reduces brightness. Furthermore, gaps exist between the upper diffuser and the lower polarizer, leading to thicker backlight units and higher production costs. Furthermore, multiple prisms, if not paired with an upper diffuser, can produce rainbow patterns, resulting in poor image quality and prone to scratches during assembly, which reduces brightness. Furthermore, direct-lit backlights are typically used with a lower diffuser, which results in thicker backlight units. Currently, no effective solutions have been proposed for these issues. Utility Model Content

[0005] Purpose of the utility model: To provide an optical composite film, a backlight module and a display panel to solve at least one of the problems existing in the above-mentioned prior art.

[0006] Technical solution: An optical composite film, comprising:

[0007] a first substrate layer;

[0008] a first prism layer, disposed on the first substrate layer;

[0009] a second substrate layer, disposed on the first prism layer at a side away from the first substrate layer;

[0010] a polarizer, disposed on the second substrate layer on a side away from the first prism layer;

[0011] A PSA layer is disposed on the polarizer at a side away from the second substrate layer; and

[0012] an atomized back coating layer, disposed on the first substrate layer at a side away from the first prism layer;

[0013] Wherein, a plurality of layer structures are stacked in sequence according to a preset order so as to reduce the thickness of the optical composite film and improve the shielding degree.

[0014] Preferably, a first bonding adhesive layer is provided between the first prism layer and the second substrate layer.

[0015] Preferably, a second bonding adhesive layer is provided between the second substrate layer and the polarizer;

[0016] Wherein, particles are provided in the second bonding adhesive layer.

[0017] Preferably, a release film is provided on the side of the PSA layer away from the polarizer to form an integrated polarizing composite film.

[0018] Preferably, a second prism layer and a third substrate layer are stacked sequentially between the first substrate layer and the atomized back coating layer from top to bottom;

[0019] The first prism portion of the first prism layer and the second prism portion of the second prism layer are two groups of orthogonal prisms.

[0020] Preferably, the first prism layer adopts a shaking appearance, and / or the second prism layer adopts a shaking appearance.

[0021] Preferably, a first bonding adhesive layer is provided between the first prism layer and the second substrate layer, and a second bonding adhesive layer is provided between the second substrate layer and the polarizer;

[0022] Wherein, particles are provided in the first bonding adhesive layer, or particles are provided in the second bonding adhesive layer.

[0023] Preferably, the cross-sections of the first prism layer and the second prism layer are both isosceles triangles, and the width of the bases thereof is 10 um-80 um.

[0024] Preferably, the vertex angle between the first prism layer and the second prism layer is 60-95°.

[0025] Preferably, the refractive index range of the first prism layer and the second prism layer is 1.5-1.7.

[0026] Preferably, the thickness of the first substrate layer, the second substrate layer and the third substrate layer is 20 μm-300 μm.

[0027] In order to achieve the above-mentioned objective, according to another aspect of the present application, a backlight module is further provided.

[0028] The backlight module according to the present application includes the optical composite film as described above.

[0029] In order to achieve the above objective, according to another aspect of the present application, a display panel is provided.

[0030] The display panel according to the present application includes the backlight module as described above.

[0031] Beneficial effect: In the embodiment of the present application, an integrated bonding method is adopted, and multiple layer structures are stacked in sequence according to a preset order to reduce the thickness of the optical composite film and increase the shielding degree, thereby achieving the purpose of forming an integrated polarizing composite film, thereby achieving the technical effect of reducing the thickness of the optical composite film, reducing production costs and increasing the shielding degree, and thus solving the problem that the existing optical film generally uses multiple structures to meet the brightness requirements, resulting in low assembly efficiency, easy scratches and reduced brightness, and there is a GAP gap between the upper diffuser and the lower polarizer stacked, resulting in a thicker backlight module and relatively high production costs; at the same time, if the combination of multiple prisms is not matched with an upper diffuser, rainbow lines will appear, the picture quality is poor, and the assembly is easy to scratch, resulting in a decrease in brightness; and the direct backlight is generally used with a lower diffuser plate, resulting in a thicker backlight module. Technical problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the planar structure of the optical composite film of the present utility model;

[0033] Figure 2 This is a schematic flow chart of another method for preparing an optical composite film of the present invention; and

[0034] Figure 3 This is a schematic flow chart of another method for preparing an optical composite film of the present invention.

[0035] The accompanying drawings are:

[0036] 10. a first substrate layer;

[0037] 20. First prism layer;

[0038] 30. a second substrate layer;

[0039] 40. Polarizer;

[0040] 50. PSA layer;

[0041] 60. Atomized back coating;

[0042] 70. First bonding adhesive layer;

[0043] 80. Second bonding adhesive layer;

[0044] 90. Release film;

[0045] 100, second prism layer;

[0046] 110. Third substrate layer. DETAILED DESCRIPTION

[0047] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0048] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0049] Furthermore, the terms "installed," "disposed," "provided with," "connected," "connected," and "socketed" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0050] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0051] like Figure 1-3 As shown, the present application relates to an optical composite film, a backlight module and a display panel. Figure 1As shown, the optical composite film includes: a first substrate layer 10; the first substrate layer 10 refers to a basic material layer, which can achieve a good supporting effect; at the same time, it can also cooperate with other components to achieve multiple functional effects.

[0052] It should be noted that the first substrate layer 10 includes two end surfaces, one of which is a light emitting surface and the other is a light incident surface.

[0053] Preferably, the first substrate layer 10 includes but is not limited to: any one of polyethylene terephthalate (PET), polycarbonate (PC) or polymethyl methacrylate (PMMA), which has excellent mechanical properties, transparency and heat resistance. As the main first substrate layer 10 in the optical composite film, it provides strength and stability while maintaining the transparency of the material; it can also achieve the effect of having a variety of materials to choose from, thereby achieving the effect of flexible use.

[0054] The first prism layer 20 is provided on the first substrate layer 10 and can achieve good prism formation, thereby ensuring good optical performance. The optical film brightness enhancement functional layer, the prism structure is formed by UV glue through mold embossing and curing.

[0055] The second substrate layer 30 is disposed on the first prism layer 20 at a side away from the first substrate layer 10 ; it can achieve good bearing and fixing effects, thereby ensuring a stable interlayer structure.

[0056] The polarizer 40 is disposed on the second substrate layer 30 on the side away from the first prism layer 20; the functions of the first prism layer 20 and the second substrate layer 30 can be respectively to refract light, control the direction of light propagation or provide structural support, while the polarizer 40 is responsible for allowing light in a specific direction to pass through and blocking light in other directions, thereby enhancing the contrast of the display or improving the efficiency of light utilization.

[0057] The PSA layer 50 is applied to the polarizer 40 on the side away from the second substrate layer 30. The PSA layer 50 is used to securely adhere the polarizer 40 to another substrate or optical component. For example, in a display or touch panel, the polarizer 40 is secured to the cover glass or other substrate. The PSA layer 50 requires high transparency and a low refractive index to ensure it does not interfere with light transmission, thereby maintaining the overall optical performance of the polarizer 40 and the optical component. The PSA layer 50 is a pressure-sensitive adhesive material and will ultimately be bonded to the panel glass.

[0058] The atomized back coating layer 60 is disposed on the first substrate layer 10 on the side away from the first prism layer 20. The atomized back coating layer 60 has high shielding properties and is obtained by stamping a machined microstructure mold or coating with a particle-containing glue. Due to its high shielding properties, it can replace the lower diffuser plate, saving a layer of plate and reducing the thickness of the backlight module.

[0059] The plurality of layer structures are stacked in sequence according to a preset order, so that the thickness of the optical composite film is reduced and the shielding degree is increased, thereby achieving a good integrated polarizing composite film forming effect.

[0060] The present application can achieve direct bonding between the substrate layer 30 and the lower polarizer 40, reducing the air gap by about 1 mm, thereby greatly reducing the thickness of the backlight module.

[0061] The atomized layer is placed above the prisms and the two can be directly bonded, which can solve the rainbow pattern caused by the cross-matching of prisms and improve the shielding performance;

[0062] The back-coated atomized layer can replace the lower diffuser plate, reducing material usage costs, improving assembly efficiency, and making the backlight module lighter and thinner.

[0063] From the above description, it can be seen that this application achieves the following technical effects:

[0064] In the embodiment of the present application, an integrated bonding method is adopted, and multiple layer structures are stacked in sequence according to a preset order to reduce the thickness of the optical composite film and increase the shielding degree, thereby achieving the purpose of forming an integrated polarizing composite film, thereby achieving the technical effect of reducing the thickness of the optical composite film, reducing production costs and increasing the shielding degree, and further solving the problem that the existing optical film generally uses multiple structures to meet the brightness requirements, resulting in low assembly efficiency, easy scratches and reduced brightness, and there is a GAP gap between the stacking of the upper diffuser and the lower polarizer 40, resulting in a thicker backlight module and relatively high production costs; at the same time, if the combination of multiple prisms is not matched with an upper diffuser, rainbow lines will appear, the picture quality is poor, and the assembly is easy to scratch, resulting in a decrease in brightness; and the direct backlight is generally used with a lower diffuser plate, resulting in a thicker backlight module. Technical problems.

[0065] Furthermore, a first bonding adhesive layer 70 is disposed between the first prism layer 20 and the second substrate layer 30. As will be appreciated, this ensures a good interlayer connection, thereby ensuring structural stability. The first bonding adhesive layer 70 acts as an adhesive, bonding the first prism layer 20 to the second substrate layer 30.

[0066] Furthermore, a second bonding adhesive layer 80 is provided between the second substrate layer 30 and the polarizer 40;

[0067] The second bonding adhesive layer 80 is provided with particles, which can ensure good interlayer connection and thus structural stability; at the same time, the addition of particles can provide a certain degree of haze to play a shielding role.

[0068] Specifically, the particle-containing bonding adhesive layer is obtained by mixing diffused particles into bonding glue, which can provide a certain haze to play a shielding role. At the same time, it can also bond the second substrate layer 30 and the polarizer 40 together, which can reduce the gap between the polarizer 40 and the composite film in the traditional structure, greatly reducing the total thickness.

[0069] Furthermore, a release film 90 is provided on the side of the PSA layer 50 away from the polarizer 40 to form an integrated polarizing composite film. This provides excellent protection for the film. Preferably, the release film 90 is made of PE or PET and is a consumable material for the product.

[0070] like Figure 2 As shown, a second prism layer 100 and a third substrate layer 110 are stacked sequentially between the first substrate layer 10 and the atomized back coating layer 60 from top to bottom;

[0071] The first prism portion of the first prism layer 20 and the second prism portion of the second prism layer 100 are two groups of orthogonal prisms. It can be understood that good optical performance can be achieved.

[0072] Furthermore, the first prism layer 20 and the second prism layer 100 are of equal height or unequal height.

[0073] Furthermore, the first prism layer 20 has a jittered appearance, and / or the second prism layer 100 has a jittered appearance. It is understood that in order to improve the product's anti-interference ability, in the above two states, one set of prisms has a jittered appearance, or both sets of prisms have a jittered appearance.

[0074] like Figure 3 As shown, a first bonding adhesive layer 70 is provided between the first prism layer 20 and the second substrate layer 30 , and a second bonding adhesive layer 80 is provided between the second substrate layer 30 and the polarizer 40 ;

[0075] The first bonding adhesive layer 70 or the second bonding adhesive layer 80 may contain particles. It is understood that this can achieve a good interlayer connection effect. Furthermore, particles can be added to the corresponding bonding adhesive layer according to actual usage requirements to achieve a shielding effect.

[0076] Furthermore, the cross-sections of the first prism layer 20 and the second prism layer 100 are both isosceles triangles, and the width of their bases is 10 μm-80 μm. It is understood that good optical performance can be achieved while also achieving the effect of flexible selection of various widths.

[0077] Furthermore, the vertex angles of the first prism layer 20 and the second prism layer 100 are 60-95°. It is understood that a variety of vertex angles can be selected, thereby achieving a flexible use effect.

[0078] Furthermore, the refractive index of the first prism layer 20 and the second prism layer 100 is in the range of 1.5-1.7. It is understood that a good refractive index can be ensured.

[0079] Furthermore, the thickness of the first substrate layer 10, the second substrate layer 30 and the third substrate layer 110 is 20 μm-300 μm. It is understood that a good supporting effect can be achieved, and at the same time, a variety of sizes can be selected.

[0080] The specific examples are further described below:

[0081] Example 1

[0082] Adopt liquid crystal glass with integrated polarized DOP composite film.

[0083] At this time, after testing, the results of the optical composite film are: excellent shielding effect, excellent film scratch resistance, module thickness of 8mm, excellent assembly efficiency, no rainbow pattern phenomenon, and brightness ratio of 138%.

[0084] Example 2

[0085] The difference between Example 2 and Example 1 is that liquid crystal glass is bonded with an integrated polarizing POP composite film.

[0086] At this time, after testing, the results of the optical composite film are: excellent shielding effect, excellent film scratch resistance, module thickness of 8mm, excellent assembly efficiency, no rainbow pattern phenomenon, and brightness ratio of 162%.

[0087] Comparative Example 1

[0088] The difference between Comparative Example 1 and Example 1 is that a general lower polarizer 40+DOP composite film+diffuser plate is used to adhere to the liquid crystal glass.

[0089] At this time, after testing, the results of the optical composite film are: excellent shielding effect, excellent scratch resistance of the film, module thickness is 11mm, assembly efficiency is low, there is no rainbow pattern phenomenon, and the brightness ratio is 130%.

[0090] Comparative Example 2

[0091] The difference between Comparative Example 2 and Example 1 is that a liquid crystal glass is attached with a general lower polarizer 40 + upper diffusion film + POP composite film + diffusion plate.

[0092] At this time, after testing, the results of the optical composite film are: good shielding effect, poor scratch resistance of the film, module thickness is 11mm, assembly efficiency is low, rainbow pattern phenomenon is slight, and brightness ratio is 153%.

[0093] It should be noted that the comparative example is a conventional optical film combination solution in a backlight module in the market, and a direct-lit liquid crystal display is used as a comparison object.

[0094] The results of each embodiment and comparative example are shown in Table 1:

[0095] Table 1

[0096]

[0097]

[0098] From the above test results we can see that:

[0099] As shown in Examples 1-2 and Comparisons 1-2, both DOP and POP offer integrated lamination solutions that can replace diffusers, saving a layer of material and enabling thinner products. The lamination layer contains particles that create haze, effectively replacing the upper diffuser film. Furthermore, integration with the lower polarizer improves assembly efficiency by over 50%.

[0100] The utility model also has the following beneficial effects:

[0101] 1. This application provides a single film solution with high brightness, high shielding, good scratch resistance, and anti-interference comprehensive effects. It can also improve assembly efficiency and make display products lighter and thinner.

[0102] 2. High-shielding atomized back coating can replace the diffuser plate, making the product lighter and thinner.

[0103] 3. Directly bond with the lower polarizer to reduce the gap between film materials.

[0104] The present application also relates to a backlight module, comprising the optical composite film as described above, which can be used in a liquid crystal display device to improve the display quality of the display device.

[0105] The present application also relates to a display panel, comprising the backlight module as described above.

[0106] The display panel of this embodiment may be any product or component with a display function, such as a liquid crystal panel, electronic paper, a liquid crystal television, or a liquid crystal display.

[0107] The present application also relates to a method for preparing an optical composite film, which is used to prepare the optical composite film as described above; the method comprises the following steps:

[0108] Step 1: Prepare a first substrate layer 10;

[0109] Step 2: coating a first light-curing coating on the first substrate layer 10;

[0110] Step 3: Using a mold to form a first prism layer 20 by means of a light-curing transfer process;

[0111] Step 4: Prepare a second substrate layer 30;

[0112] Step 5: Apply adhesive to both sides of the second substrate layer 30;

[0113] Step 6: Paste the second substrate layer 30 onto the first prism layer 20 on the side away from the first substrate layer 10 by heat pressing or gluing;

[0114] Step 7: affix the polarizer 40 to the side of the second substrate layer 30 away from the first prism layer 20 by adhesive, and fix the polarizer 40 by pressure-sensitive adhesive or heat pressing;

[0115] Step 8: Evenly coating the PSA layer 50 on the side of the polarizer 40 away from the second substrate layer 30;

[0116] Step 9: attaching a release film 90 to the PSA layer 50;

[0117] Step 10: Coat the atomized back coating layer 60 on the side of the first substrate layer 10 away from the first prism layer 20 .

[0118] Specifically, step 1: prepare a first substrate layer 10;

[0119] Providing the basic structural layer of the optical film, a transparent substrate with good optical properties and mechanical strength is usually selected.

[0120] The first substrate layer 10 is generally made of PET (polyester) or PC (polycarbonate) material, which has good light transmittance, heat resistance and mechanical strength, and is suitable for optical film applications.

[0121] The thickness of the substrate layer ranges from 50 to 200 microns, and is selected based on the final use of the film.

[0122] Step 2: coating a first light-curing coating on the first substrate layer 10;

[0123] It provides a base coating for the subsequent formation of the prism layer, and hardens the coating through a light curing process.

[0124] Light-curing coatings are usually ultraviolet light-curing resins (UV resins) with good optical transparency and hardening properties.

[0125] The coating is evenly applied using a precision coating machine, with the coating thickness generally ranging from 10-50 microns to ensure uniformity and smoothness of the coating.

[0126] During the light curing process, an ultraviolet light source with a wavelength of 365nm is used for irradiation. The irradiation time is determined according to the type and thickness of the coating, generally ranging from a few seconds to tens of seconds.

[0127] Step 3: Using a mold to form a first prism layer 20 by means of a photocuring transfer process;

[0128] The prism layer is formed by embossing the light-curing coating using a mold structure.

[0129] The mold surface has a prism shape with a microstructure, usually made of metal molds or specially processed polymer molds.

[0130] The photocuring transfer process is to press the mold onto the surface of the uncured photocuring coating and cure the coating in the mold through ultraviolet light irradiation, thereby forming a layer with a microscopic prismatic structure.

[0131] During the embossing process, the mold applies a certain pressure (usually 0.1-0.5 MPa) for a few seconds to tens of seconds to ensure that the coating is formed without bubbles or defects.

[0132] The structural parameters of the prism layer include height, angles, spacing, etc., which are usually adjusted according to the optical design requirements. For example, the prism height is generally in the range of 5-50 microns.

[0133] Step 4: Prepare the second substrate layer 30;

[0134] As the second layer of the composite membrane, it provides support and stability.

[0135] The second substrate layer 30 is generally similar to the first substrate layer 10 and can be made of PET or PC.

[0136] Step 5: Apply adhesive to both sides of the second substrate layer 30;

[0137] Adhesive is coated on both sides of the second substrate layer 30 for subsequent interlayer bonding.

[0138] The adhesive can be acrylic or epoxy resin, with high transparency and good adhesion.

[0139] The adhesive is evenly coated on both sides of the second substrate layer 30 using a coating device, and the coating thickness is generally 5-20 microns.

[0140] Step 6: Attach the second substrate layer 30 to the first prism layer 20 on the side away from the first substrate layer 10 by heat pressing or gluing;

[0141] The second substrate layer 30 is bonded to the first prism layer 20 to form a composite structure.

[0142] The adhesive is heated at 100-150°C by a hot press and a certain pressure (about 0.2-0.6 MPa) is applied, and the bonding time is about 5-30 seconds.

[0143] If gluing is used, UV curing glue or hot melt glue can be used, and the bonding is completed by irradiating ultraviolet light or heating.

[0144] Step 7: Laminating the polarizer 40 to the side of the second substrate layer 30 away from the first prism layer 20 with an adhesive;

[0145] A polarizer 40 is attached to the other side of the second substrate layer 30 to impart a polarization optical function to the composite film.

[0146] Polarizer 40 can be fixed by pressure-sensitive adhesive (PSA) or heat pressing. If using pressure-sensitive adhesive, ensure that the adhesive layer is uniform and free of bubbles. If using heat pressing, heat bonding at 60-100°C is generally used.

[0147] The thickness of the polarizer 40 is generally 50-200 microns, which is selected according to specific requirements.

[0148] Step 8: Evenly coating the PSA layer 50 on the side of the polarizer 40 away from the second substrate layer 30;

[0149] A pressure-sensitive adhesive (PSA layer 50 ) is coated on the surface of the polarizer 40 to facilitate subsequent film material adhesion.

[0150] Use a coater to evenly coat PSA, with a coating thickness of typically 10-30 microns. Ensure the adhesive layer is uniform and transparent.

[0151] Step 9: Attaching a release film 90 to the PSA layer 50;

[0152] The PSA layer 50 is protected from contamination and damage during transportation and storage.

[0153] Materials with low adhesion and easy peeling are usually chosen, such as PET film coated with silicone oil.

[0154] The release film 90 is evenly attached to the surface of the PSA layer 50 by a laminating device to ensure that there are no bubbles or wrinkles.

[0155] Step 10: Coating an atomized back coating layer 60 on the side of the first substrate layer 10 away from the first prism layer 20;

[0156] The composite film is given specific scattering optical properties to enhance its optical performance.

[0157] Polyurethane or acrylic paints are commonly used, which have good atomization effect.

[0158] The coating thickness is generally 5-20 microns using spray or roller coating technology.

[0159] After the coating is formed, it needs to be dried and cured. The drying temperature is usually 50-80℃ and the time is about 5-10 minutes.

[0160] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and these equivalent transformations all fall within the scope of protection of the present invention.

Claims

1. An optical composite film, characterized in that: include: a first substrate layer (10); a first prism layer (20) disposed on the first substrate layer (10); a second substrate layer (30) disposed on the first prism layer (20) at a side away from the first substrate layer (10); a polarizer (40) disposed on the second substrate layer (30) on a side away from the first prism layer (20); A PSA layer (50) is disposed on the polarizer (40) at a side away from the second substrate layer (30); and an atomized back coating layer (60) disposed on the first substrate layer (10) at a side away from the first prism layer (20); Wherein, a plurality of layer structures are stacked in sequence according to a preset order so as to reduce the thickness of the optical composite film and improve the shielding degree.

2. The optical composite film according to claim 1, wherein A first bonding adhesive layer (70) is provided between the first prism layer (20) and the second base material layer (30).

3. The optical composite film according to claim 1, wherein A second bonding adhesive layer (80) is provided between the second substrate layer (30) and the polarizer (40); Wherein, particles are provided in the second bonding adhesive layer (80).

4. The optical composite film according to claim 1, wherein A release film (90) is provided on the side of the PSA layer (50) away from the polarizer (40) to form an integrated polarizing composite film.

5. The optical composite film according to claim 1, wherein A second prism layer (100) and a third substrate layer (110) are stacked sequentially between the first substrate layer (10) and the atomized back coating layer (60) from top to bottom; The first prism portion of the first prism layer (20) and the second prism portion of the second prism layer (100) are two groups of orthogonal prisms.

6. The optical composite film according to claim 5, characterized in that The first prism layer (20) adopts a shaking appearance, and / or the second prism layer (100) adopts a shaking appearance.

7. The optical composite film according to claim 6, characterized in that A first bonding adhesive layer (70) is provided between the first prism layer (20) and the second substrate layer (30), and a second bonding adhesive layer (80) is provided between the second substrate layer (30) and the polarizer (40); Wherein, particles are provided in the first bonding adhesive layer (70), or particles are provided in the second bonding adhesive layer (80).

8. The optical composite film according to claim 5, wherein The cross-sections of the first prism layer (20) and the second prism layer (100) are both isosceles triangles, and the width of their bases is 10 μm-80 μm.

9. The optical composite film according to claim 5, wherein: The vertex angles of the first prism layer (20) and the second prism layer (100) are 60-95°.

10. The optical composite film according to claim 5, wherein The refractive index of the first prism layer (20) and the second prism layer (100) is in the range of 1.5-1.

7.

11. The optical composite film according to claim 5, characterized in that: The thickness of the first substrate layer (10), the second substrate layer (30) and the third substrate layer (110) is 20 μm-300 μm.

12. A backlight module, characterized in that: The optical composite film comprises the optical composite film according to any one of claims 1 to 11.

13. A display panel, characterized in that Comprising the backlight module as claimed in claim 12.

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