CN219435175U - Multilayer structure optical film - Google Patents

Abstract

The application relates to a multilayer structure optical film, it relates to the field of optical film technique, and it includes the substrate layer, be equipped with first structural layer on the substrate layer, first structural layer is kept away from one side of substrate layer is equipped with flat coating, flat coating fills and covers at first structural layer surface, flat coating is kept away from one side of first structural layer is equipped with the second structural layer. According to the method, the surface of the first structural layer is filled with and covered with the flat coating, and then the surface of the flat coating is provided with the second structural layer, so that the effect that multiple structures are mutually matched on a single substrate layer is achieved, and the effect that the brightness is close to that of the double-layer laminating brightness enhancement film is achieved; and the mode can solve the phenomena of cutting delamination and water vapor invasion caused by double-layer laminating brightness enhancement films, thereby improving the assembly yield of the optical laminating film and reducing the manufacturing cost.

Description

Multilayer structure optical film

Technical Field

The present application relates to the field of optical film technology, and in particular, to a multilayer structured optical film.

Background

With the popularization of liquid crystal display technology, the application field of liquid crystal displays is also expanding. The backlight module is one of the key components of the lcd panel, and the requirements of the backlight module and the related optical films are also increasing. The optical laminating film has the advantages of high brightness, convenient assembly and high yield, and compared with the traditional film laminating mode, the optical laminating film greatly reduces the total thickness of the product, so that the optical laminating film is widely applied to backlight modules of liquid crystal displays.

The conventional optical bonding film generally comprises two layers of mutually bonded brightness enhancement films, wherein each brightness enhancement film is also called a prism sheet, the brightness enhancement film mainly comprises a substrate and a prism layer, the prism layer is arranged on the substrate, when the two layers of brightness enhancement films are assembled, an adhesive layer is generally arranged on the back surface of the substrate in one of the brightness enhancement films, and the adhesive layer is adhered to the peak part of the prism layer of the other brightness enhancement film to realize the effect of bonding the two layers of brightness enhancement films.

However, the light enhancement film can be assembled and used after being cut, so that the double-layer light enhancement film is easy to have the adverse phenomena of cutting layers, enabling water vapor to enter an interlayer and the like after being attached, the assembly yield of the optical attached film is reduced, and the manufacturing cost is increased.

Disclosure of Invention

In order to solve the problem that the bad phenomena of splitting layers, enabling water vapor to enter an interlayer and the like easily occur after the double-layer prism layers are attached, the application provides a multilayer structure optical film.

The application provides a multilayer structure optical film adopts following technical scheme:

the utility model provides a multilayer structure optical film, includes the substrate layer, be equipped with first structural layer on the substrate layer, first structural layer is kept away from one side of substrate layer is equipped with flat coating, flat coating fills and covers at first structural layer surface, flat coating is kept away from one side of first structural layer is equipped with the second structural layer.

By adopting the technical scheme, the flat coating is filled and covered on the surface of the first structural layer, and then the second structural layer is arranged on the surface of the flat coating, so that the effect that multiple structures are mutually matched on a single substrate layer is realized, and the effect that the brightness is close to that of a double-layer laminating brightness enhancement film is achieved; and the mode can solve the phenomena of cutting delamination and water vapor invasion caused by double-layer laminating brightness enhancement films, thereby improving the assembly yield of the optical laminating film and reducing the manufacturing cost.

In a specific embodiment, the surface of the flat coating layer near the side of the second structural layer is 2-10um higher than the top surface of the first structural layer structure, and the surface of the flat coating layer is flat.

In a specific embodiment, the refractive index of the topcoat is from 1.43 to 1.5.

In a specific embodiment, the first structural layer includes a first prism array formed by uniformly arranging a plurality of first prisms, wherein the first prisms have a triangular longitudinal cross-sectional shape, and the included angle between the first prism array and the edge of the substrate layer is 0 ° -45 °.

In a specific embodiment, the triangle is an isosceles triangle, the triangle has a height of 25-50um, and the triangle has a vertex angle of 80 ° -110 °.

In a specific embodiment, the first structural layer includes a land array formed by uniformly arranging a plurality of lands, the land array forms an included angle of 0 ° to 45 ° with the edge of the substrate layer, and the longitudinal section of the land is trapezoidal.

In a specific embodiment, the trapezoid is an isosceles trapezoid, the height of the trapezoid is 10-40um, and the base angle of the trapezoid is 35-50 degrees

In a specific embodiment, the refractive index of the first structural layer is from 1.53 to 1.68.

In a specific embodiment, the second structural layer includes a lens array formed by uniformly arranging a plurality of lenses, wherein the edges of the lenses are circular, the diameter of the circular is 5um-100um, and the height of the vertex of the lenses is 1/3-2/3 of the diameter of the circular.

In a specific embodiment, the edge shape of the lens is a regular polygon, the diagonal length of the regular polygon is 5um-100um, and the lens vertex height is 1/3-2/3 of the diagonal length of the regular polygon.

In a specific implementation manner, the second structural layer comprises a second prism array formed by uniformly arranging a plurality of second prisms, wherein the longitudinal section shape of the second prisms is an isosceles triangle, the height of the isosceles triangle is 5-35um, and the vertex angle of the isosceles triangle is 80-110 degrees.

In a specific embodiment, the second structural layer comprises an atomized structural layer having a surface haze of 20% to 99% and a thickness of 5 to 40um.

In a specific embodiment, the refractive index of the second structural layer is 1.53-1.68.

In a specific embodiment, the side of the substrate layer away from the first structural layer is provided with an atomization layer, the surface haze of the atomization layer is 1% -80%, and the thickness of the atomization layer is 1-10 μm.

In summary, the beneficial technical effects of the application are:

1. according to the multilayer structure optical film, the flat coating is filled and covered on the surface of the first structural layer, and then the second structural layer is arranged on the surface of the flat coating, so that the effect that multiple structures are mutually matched on a single substrate layer is achieved, and the effect that the brightness is close to that of a double-layer laminating brightness enhancement film is achieved;

2. the multilayer structure optical film can solve the problems of cutting layering and water vapor invasion caused by the lamination of the double-layer brightness enhancement film, so that the assembly yield of the optical lamination film is improved, and the manufacturing cost is reduced;

3. compared with the traditional double-layer laminating brightness enhancement film, the multilayer structure optical film provided by the application has the advantages that only one layer of base material is needed, so that the base material can be saved, and the material cost is reduced.

Drawings

Fig. 1 is a schematic structural view of a multilayer optical film according to embodiment 1 of the present application.

Fig. 2 is a schematic structural view of a multilayer optical film according to embodiment 2 of the present application.

Fig. 3 is a schematic structural view of a multilayer optical film according to embodiment 3 of the present application.

Fig. 4 is a schematic structural view of a multilayer optical film according to embodiment 4 of the present application.

Fig. 5 is a schematic structural view of a multilayer optical film according to embodiment 5 of the present application.

FIG. 6 is a schematic structural diagram of the optical film of comparative example 1 sheet Zhang Lengjing in Table 1.

Fig. 7 is a schematic structural diagram of the optical film of comparative example 2 sheet Zhang Lengtai in table 1.

FIG. 8 is a schematic structural diagram of the optical film of comparative example 3 sheet Zhang Toujing in Table 1.

Fig. 9 is a schematic diagram showing the structure of the optical film laminated with the double lens prism of comparative example 5 in table 1.

Fig. 10 is a schematic diagram showing the structure of the optical film attached to the prism of the comparative example 6 in table 1.

FIG. 11 is a schematic diagram showing the structure of a double atomized structure layer prism laminated optical film according to comparative example 7 in Table 1.

Reference numerals illustrate: 1. a substrate layer; 2. an atomization layer; 3. a first structural layer; 31. a first prism array; 311. a prism I; 32. an array of lands; 321. a land; 4. a flat coating; 5. a second structural layer; 51. a second prism array; 511. a prism II; 52. a lens array; 521. a lens; 53. an atomization structure layer; 6. a substrate structural layer; 7. a prismatic structure layer; 8. a lens structure layer; 9. an adhesive layer; 10. a prismatic table structure layer; 11. atomizing the film layer.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-5.

The embodiment of the application discloses a multilayer structure optical film.

Example 1

Referring to fig. 1, a multilayer structure optical film includes a substrate layer 1, and in this embodiment, the substrate layer 1 may be, but is not limited to, a polyethylene terephthalate layer, a polycarbonate layer, and a polymethyl methacrylate layer; the substrate layer 1 is provided with an atomization layer 2, in this embodiment, the atomization layer 2 is coated by a coating solution containing particles and then is cured on the lower surface of the substrate layer 1 to form irregularly distributed atomization layers 2, the surface haze of the atomization layers 2 is 1% -80%, the thickness of the atomization layers 2 is 1-10 μm, in this embodiment, the surface haze of the atomization layers 2 is 1% -15%, and the thickness of the atomization layers 2 is 2-5 μm.

Referring to fig. 1, a first structural layer 3 is disposed on a side of a substrate layer 1 away from an atomization layer 2, the first structural layer 3 is formed by embossing or extrusion, the refractive index of the first structural layer 3 is 1.53-1.68, the included angle between the first structural layer 3 and the edge of the substrate layer 1 is 0 ° -45 °, in this embodiment, the refractive index of the first structural layer 3 is 1.55-1.59, and the included angle between the first structural layer 3 and the edge of the substrate layer 1 is 0 ° -15 °;

the first structural layer 3 includes a first prism array 31 formed by uniformly arranging a plurality of prism first 311, in this embodiment, the first prism array 31 is embossed by a hard wheel mold to generate a plurality of prism first 311, the longitudinal cross-section of the plurality of prism first 311 is triangular, the triangle is isosceles triangle, the height of the triangle is 25-50um, the apex angle of the triangle is 80 ° -110 °, in this embodiment, the height of the triangle is 30-40um, and the apex angle of the triangle is 88 ° -92 °.

Referring to fig. 1, a flat coating layer 4 is disposed on a side of the first structural layer 3 far from the substrate layer 1, the flat coating layer 4 is filled and covered on the surface of the first structural layer 3, in this embodiment, the flat coating layer 4 is uniformly filled and coated on the surface of the first structural layer 3 by a micro concave anilox roller and a doctor blade coating process of a precision coater, the linear velocity ratio of the micro concave anilox roller is controlled so that the surface height of the flat coating layer 4 is 2-10um higher than the top of the first structural layer 3, and the flat coating layer is formed by UV irradiation and solidification, the viscosity of the acrylic resin a is 30-80Cps at 25 ℃, the refractive index of the flat coating layer 4 is 1.43-1.5, and in this embodiment, the refractive index of the flat coating layer 4 is 1.46-1.48.

Referring to fig. 1, a second structural layer 5 is disposed on a side of the flat coating layer 4 far from the first structural layer 3, the second structural layer 5 includes a lens array 52 uniformly arranged by a plurality of lenses 521, in this embodiment, the lens array 52 is pre-cured on the surface of the flat coating layer 4 by UV irradiation of acrylic resin B through a soft mold of PET or PC with a substrate of a micro concave mirror structure embossed thereon, the refractive index of the acrylic resin B is 1.53-1.68, the inside of the acrylic resin B contains a silane coupling agent for improving adhesion, the coupling agent accounts for 0.05% -3%, the coupling agent enables the coupling agent to adhere to the surface of the flat coating layer 4 better, the refractive index of the lens array 52 is 1.53-1.68, and in this embodiment, the refractive index of the lens array 52 is 1.55-1.59;

the edge shape of the plurality of lenses 521 is circular, the diameter of the circular shape is 5um-100um, the height of the vertex of the lenses 521 is 1/3-2/3 of the diameter, in this embodiment, the diameter of the circular shape is 20um-50um, the height of the vertex of the lenses 521 is 1/3-1/2 of the diameter of the circular shape, and the longitudinal section shape of the plurality of lenses 521 is semicircular.

The implementation principle of the embodiment 1 is as follows: filling and covering the flat coating 4 on the surface of the first prism array 31, and arranging the lens array 52 on the surface of the flat coating 4, so that the effect that multiple structures are mutually matched on the single substrate layer 1 can be realized;

the first prism array 31 has good condensation effect, the lens array 52 can improve the collimation effect of incident light, meanwhile, the shielding property of the incident light meets the requirement, and the single Zhang Guangxue film with the multilayer structure can have better condensation effect on the premise of ensuring that the optical film has enough visual angle and excellent interference resistance by arranging the first prism array 31 and the lens array 52, so that the effect that the brightness is close to that of the double-layer laminating brightness enhancement film can be achieved, and the universality of products is further improved;

compared with the traditional double-layer substrate structure laminating film, the single Zhang Guangxue film saves one substrate layer 1 on the premise of ensuring the brightness of the product, reduces the material cost and improves the processing yield; and the mode can also solve the phenomena of cutting delamination and water vapor invasion caused by double-layer laminating and polishing films, thereby improving the assembly yield of the optical laminating film and reducing the manufacturing cost.

Example 2

Referring to fig. 2, the difference between the present embodiment and embodiment 1 is that the first structural layer 3 includes a land array 32 formed by uniformly arranging a plurality of lands 321, in this embodiment, the land array 32 is embossed by a hard wheel mold to generate a plurality of lands 321, the longitudinal section of the plurality of lands 321 is trapezoidal, the trapezoid is an isosceles trapezoid, the height of the trapezoid is 10-40um, the base angle of the trapezoid is 35 ° -50 °, in this embodiment, the height of the trapezoid is 25-35um, and the base angle of the trapezoid is 44 ° -46 °.

The implementation principle of the embodiment 2 is as follows: the prism array 32 is provided with the trapezoidal prisms with good brightness and good light condensing effect, so that the single Zhang Guangxue film with the multilayer structure has better light condensing effect, and the single Zhang Guangxue film with the multilayer structure can achieve the effect that the brightness is close to that of the double-layer laminating brightness enhancement film, and further the overall brightness can be improved.

Example 3

Referring to fig. 3, the difference between the present embodiment and embodiment 1 is that the edge shape of the plurality of lenses 521 is a regular polygon, the diagonal length of the regular polygon is 5um-100um, the height of the vertex of the lens 521 is 1/3-2/3 of the diagonal length, in the present embodiment, the diagonal length of the regular polygon is 5um-100um, the height of the vertex of the lens 521 is 1/3-1/2 of the diagonal length of the regular polygon, in the present embodiment, the edge shape of the plurality of lenses 521 is a regular hexagon, and the longitudinal section shape of the plurality of lenses 521 is a semicircle.

The implementation principle of the embodiment 3 is as follows: by setting the edge shape of the lens 521 to be regular hexagon, the adjacent lenses 521 in the lens array 52 can be fully contacted, so that the arrangement is more compact, the single Zhang Guangxue film with the multilayer structure has better condensing effect, and the effect that the brightness is close to that of the double-layer laminating brightness enhancement film can be achieved.

Example 4

Referring to fig. 4, the difference between the present embodiment and embodiment 1 is that the second structural layer 5 includes a second prism array 51 formed by uniformly arranging a plurality of second prisms 511, in this embodiment, the second prism array 51 generates a plurality of second prisms 511 by hard wheel die stamping, the longitudinal section shapes of the plurality of second prisms 511 are all isosceles triangles, the height of the isosceles triangle is 5-35um, the vertex angle of the isosceles triangle is 80 ° -110 °, in this embodiment, the height of the isosceles triangle is 10-25um, the vertex angle of the isosceles triangle is 88 ° -92 °, and the refractive index of the second prism array 51 is 1.53-1.68; in the present embodiment, the second prism array 51 is disposed perpendicular to the first prism array 31, and the second prism 511 is disposed perpendicular to the first prism 311, i.e. the second prism array 51 is rectangular and the first prism array 31 is a plurality of isosceles triangles uniformly arranged in the same side view of the multilayer optical film.

The implementation principle of the embodiment 4 is as follows: the second structure layer 5 is provided with the second prism array 51, so that the multilayer structure optical film is of a double-layer prism array structure, the overall light condensation effect of the multilayer structure optical film can be improved, and the overall brightness can be improved; in addition, the second prism array 51 is arranged perpendicular to the first prism array 31, so that interference between the second prism array 51 and the first prism array 31 can be avoided, and the practicability can be improved.

Example 5

Referring to fig. 5, the present embodiment is different from embodiment 1 in that the second structural layer 5 includes an atomized structural layer 53, and in the present embodiment, the atomized structural layer 53 is cured after being coated with a coating liquid containing particles or is embossed on the upper surface of the flat coating layer 4 by a micro structure with uneven surface, so as to form an irregularly distributed atomized structural layer 53 with specific haze; the surface haze of the atomization structure layer 53 is 20% -99%, the thickness of the atomization structure layer 53 is 5-40um, in this embodiment, the surface haze of the atomization structure layer 53 is 70% -95%, the thickness of the atomization structure layer 53 is 10-30um, and the refractive index of the atomization structure layer 53 is 1.53-1.68.

The implementation principle of the embodiment 5 is as follows: through being equipped with the second layer structure and becoming atomization structure layer 53, atomization structure layer 53 shields effectually, under the circumstances of guaranteeing certain luminance, can reduce the interference and the reflection of light, promotes holistic anti-interference effect, promotes holistic haze and visual angle, reduces production process and cost, promotes the product commonality.

The multilayer optical film of the present utility model was tested and compared to the performance of the single Zhang Guangxue film and the double optical film in the prior art, and the luminance was tested using a TOPCONBM-7AS 55 inch display screen, the results of which are shown in Table 1.

Table 1 comparison of optical film properties

Wherein, comparative example 1 referring to fig. 6, the single Zhang Lengjing optical film comprises a base structure layer 6 and a prism structure layer 7; comparative example 2 referring to fig. 7, a single Zhang Lengtai optical film includes a base structure layer 6 and a land structure layer 10; comparative example 3 referring to fig. 8, a single Zhang Toujing optical film includes a substrate structural layer 6 and a lens structural layer 8;

comparative example 4 referring to fig. 9, a double-lens prism-attached optical film includes two base material structure layers 6, wherein one base material structure layer 6 is provided with a prism structure layer 7, the other base material structure layer 6 is provided with a lens structure layer 8, and a peak portion of the prism structure layer 7 is bonded with the back surface of the other base material structure layer 6 through an adhesive layer 9;

comparative example 5 referring to fig. 10, a double prism-bonded optical film includes two base material structure layers 6, both of the base material structure layers 6 are provided with a prism structure layer 7, and a peak portion of the prism structure layer 7 is bonded with the back surface of the other base material structure layer 6 through an adhesive layer 9; the two prism structure layers 7 are composed of a plurality of uniformly arranged triangular prisms, wherein one prism structure layer 7 and the other prism structure layer 7 are vertically arranged, namely, one prism structure layer 7 shown in the same side view of the optical film attached by the double prism is rectangular, and the other prism structure layer 7 is a plurality of uniformly arranged triangles;

comparative example 6 referring to fig. 11, a double-atomized structure layer prism laminated optical film includes two base material structure layers 6, wherein one base material structure layer 6 is provided with a prism structure layer 7, the other base material structure layer 6 is provided with an atomized film layer 11, and a peak portion of the prism structure layer 7 is adhered to the back surface of the other base material structure layer 6 through an adhesive layer 9;

as can be seen from the results of the performance test of each optical film, the single Zhang Guangxue film with the multilayer structure has better splitting and layering effects compared with the double-sheet optical structure brightness enhancement film under the same structure, can effectively avoid the infiltration of water vapor, and simultaneously saves the cost of a base material; the single Zhang Guangxue film with the multilayer structure has higher brightness gain effect than the single Zhang Guangxue film with the single layer structure under the same structure, thereby improving the universality of products.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (14)

1. A multilayer structured optical film characterized by: including substrate layer (1), be equipped with first structural layer (3) on substrate layer (1), first structural layer (3) are kept away from one side of substrate layer (1) is equipped with flat coating (4), ping Tuceng (4) are filled and are covered on first structural layer (3) surface, ping Tuceng (4) are kept away from one side of first structural layer (3) is equipped with second structural layer (5).

2. The multilayer structure optical film of claim 1, wherein: the surface of the Ping Tuceng (4) close to one side of the second structural layer (5) is 2-10um higher than the top surface of the first structural layer (3), and the Ping Tuceng (4) is flat.

3. The multilayer structure optical film of claim 2, wherein: the refractive index of Ping Tuceng (4) is 1.43-1.5.

4. The multilayer structure optical film of claim 1, wherein: the first structural layer (3) comprises a first prism array (31) formed by uniformly arranging a plurality of first prisms (311), the longitudinal section of each first prism (311) is triangular, and the included angle between the first prism array (31) and the edge of the substrate layer (1) is 0-45 degrees.

5. The multilayer structure optical film of claim 4, wherein: the triangle is an isosceles triangle, the height of the triangle is 25-50um, and the vertex angle of the triangle is 80-110 degrees.

6. The multilayer structure optical film of claim 1, wherein: the first structural layer (3) comprises a prismatic table array (32) which is formed by uniformly arranging a plurality of prismatic tables (321), the included angle between the prismatic table array (32) and the edge of the substrate layer (1) is 0-45 degrees, and the longitudinal section shape of the prismatic table (321) is trapezoid.

7. The multilayer structure optical film of claim 6, wherein: the trapezoid is an isosceles trapezoid, the height of the trapezoid is 10-40um, and the base angle of the trapezoid is 35-50 degrees.

8. The multilayer structure optical film of claim 1, wherein: the refractive index of the first structural layer (3) is 1.53-1.68.

9. The multilayer structure optical film of claim 1, wherein: the second structural layer (5) comprises a lens array (52) formed by uniformly arranging a plurality of lenses (521), the edge of each lens (521) is circular, the diameter of each circular is 5um-100um, and the height of the vertex of each lens (521) is 1/3-2/3 of the diameter of each circular.

10. The multilayer structure optical film of claim 9, wherein: the edge shape of the lens (521) is a regular polygon, the diagonal length of the regular polygon is 5um-100um, and the vertex height of the lens (521) is 1/3-2/3 of the diagonal length of the regular polygon.

11. The multilayer structure optical film of claim 1, wherein: the second structural layer (5) comprises a second prism array (51) formed by uniformly arranging a plurality of second prisms (511), the longitudinal section of each second prism (511) is in the shape of an isosceles triangle, the height of the isosceles triangle is 5-35um, and the vertex angle of the isosceles triangle is 80-110 degrees.

12. The multilayer structure optical film of claim 1, wherein: the second structural layer (5) comprises an atomization structural layer (53), the surface haze of the atomization structural layer (53) is 20% -99%, and the thickness of the atomization structural layer (53) is 5-40um.

13. The multilayer structure optical film of claim 1, wherein: the refractive index of the second structural layer (5) is 1.53-1.68.

14. The multilayer structure optical film of claim 1, wherein: one side of the substrate layer (1) far away from the first structural layer (3) is provided with an atomization layer (2), the surface haze of the atomization layer (2) is 1% -80%, and the thickness of the atomization layer (2) is 1-10 mu m.