CN220419595U

CN220419595U - Composite diffusion plate with independent polyhedral structure

Info

Publication number: CN220419595U
Application number: CN202321654776.6U
Authority: CN
Inventors: 蒲溢; 徐良霞; 李刚; 张彦
Original assignee: Zhejiang Xinzhi New Materials Co ltd; Ningbo Exciton Technology Co Ltd
Current assignee: Zhejiang Xinzhi New Materials Co ltd; Ningbo Exciton Technology Co Ltd
Priority date: 2023-06-28
Filing date: 2023-06-28
Publication date: 2024-01-30
Anticipated expiration: 2033-06-28

Abstract

The composite diffusion plate with independent polyhedron structure includes one diffusion plate and one optical film, and the diffusion plate consists of at least three areas, one upper layer structure area, one middle layer structure area, and one lower layer structure area. The composite diffusion plate can improve the problems of brightness loss, shielding property, warping and the like of the film plate attaching product.

Description

Composite diffusion plate with independent polyhedral structure

Technical Field

The utility model relates to an optical film and a diffusion plate, in particular to a composite diffusion plate with an independent polyhedral structure.

Background

In the existing backlight module, the diffusion plate and the optical film are attached through UV glue, so that the production process flow is simplified, the product competitiveness is improved, and the cost investment is reduced. In the current film plate lamination, in order to reduce the conditions of warping, brightness loss, shielding property and the like, simple structural treatment such as prism, frosting, crescent moon and the like is carried out on the upper layer structural surface or the lower layer structural surface of the diffusion plate, the principle is that transmitted light is collected again, the scattered light utilization rate is improved, the purpose of improving the front brightness and the shielding property is achieved, the light which is not utilized outside a visual angle is recycled by utilizing the reflection of the light, the light loss is reduced, and the benefits of energy conservation, low carbon and environmental protection are indirectly achieved; however, the structures are long continuous structures, and after the diffusion substrate plate of the structure is shaped, large internal stress exists in the diffusion substrate plate, and the internal stress is gradually released along with the temperature rise, so that the diffusion substrate plate of the structure is adhered to a product to generate serious warping.

CN200780013199.X discloses a diffusion plate and a surface light source device, wherein a prism sheet (36), a concave-convex diffusion plate (37) and a correction optical sheet (38) are superimposed on a light guide plate (32). Light emitted from the light guide plate (32) in a direction substantially parallel to the light emitting surface (45) is bent in a direction substantially perpendicular to the light emitting surface (45) by the prism sheet (36). Light having a long directional characteristic in the r-axis direction, which has passed through the prism sheet (36), is converted into light having a substantially circular directional characteristic by passing through the uneven diffusion plate (37). Furthermore, light having a substantially circular directivity characteristic transmitted through the concave-convex diffusion plate (37) is converted into light having a directivity characteristic closer to a perfect circle by the correction optical sheet (38). The correction optical sheet (38) is formed from a plurality of polyhedral shaped patterns. Compared with the technology of the utility model, the diffusion plate and the functional film of the utility model are attached by UV glue, so as to optimize the production process; the independent structure can disperse the internal stress of the diffusion plate, thereby improving the warping.

CN200880004845.0 discloses a light diffusion plate for a backlight module of a liquid crystal display or a lighting device, which comprises a base resin of polycarbonate resin or polyethylene resin, so as to exhibit proper brightness and high shielding property, or proper shielding property and high brightness. Compared with the technology of the utility model, the utility model has the outstanding effect of improving the warpage, and the technical effect of improving the warpage is achieved by adding a heat radiation device mode when dispersing and solidifying the structure.

CN201220361574.8 discloses a backlight module and a display device. The backlight module comprises: the LED lamp comprises a luminous component and a reflecting support component, wherein the luminous component comprises a unit surface which is obliquely arranged and a luminous body which is arranged on the unit surface, and the reflecting support component comprises a reflecting surface which is obliquely arranged. Compared with the technology of the utility model, the utility model has the outstanding effect of improving the warpage, the utility model has the advantages that the structures are dispersed, and a certain distance is reserved between the adjacent structures, so that the internal stress of the diffusion plate is dispersed, and meanwhile, the heat dissipation equipment is added during solidification, so that the technical effect of improving the warpage is achieved.

In order to solve the problems in the prior art, the utility model provides an independent polyhedral structure and an ultraviolet irradiation curing part for increasing heat dissipation, wherein the independent polyhedral structure disperses the internal stress in the diffusion plate while improving the brightness loss, so that the warping problem of the composite diffusion plate of the independent polyhedral structure is reduced; meanwhile, heat dissipation is added at the ultraviolet irradiation curing position, so that the warping problem of the composite diffusion plate with the independent polyhedral structure can be improved.

Therefore, the problems of brightness loss, shielding property, warping and the like of the film plate attached product can be better improved by the independent polyhedral structure and the increased heat dissipation during curing.

Disclosure of Invention

The utility model mainly aims to provide a composite diffusion plate with an independent polyhedral structure, so as to solve the problems of brightness loss, shielding property, warping and the like of a film plate attached product.

The utility model provides a composite diffusion plate with an independent polyhedral structure, which comprises:

the diffusion plate is composed of at least three areas, wherein the first area is an upper layer structure area, the second area is a middle area, and the third area is a lower layer structure area;

an optical film is provided, which is a film,

wherein the upper surface of the first area of the diffusion plate is engraved with an independent polyhedral structure; the second area of the diffusion plate is one or more of a common plate, a foaming plate and a quantum dot plate; carving an independent polyhedral structure or not performing structural treatment on the lower surface of the third area of the diffusion plate;

the optical film is arranged on the polyhedral structure on the upper surface of the first area.

Further, the independent polyhedron structure is an independent tetrahedron, a pentahedron, a hexahedron, a quadrangular frustum, a pentagonal frustum, a hexagonal frustum, a cone and a round bench.

Further, the included angle of the independent polyhedron structure is 10-140 degrees, or 20 degrees, 40 degrees, 50 degrees, 70 degrees, 90 degrees and 120 degrees; the angle of the independent polyhedron structure is 10-100 degrees or 20 degrees, 40 degrees, 50 degrees, 70 degrees and 90 degrees.

Further, the height of the independent polyhedron structure is 0.01-0.1 mm, or 0.02mm, 0.04mm, 0.05mm, 0.06mm, 0.08mm and 0.09mm; the width of the bottom surface of the independent polyhedral structure is 0.1-0.9 mm, or 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm and 0.8mm; the thickness of the side length of the independent polyhedron structure is 0.05-0.2 mm, or 0.06mm, 0.08mm, 0.10mm, 0.14mm, 0.15mm and 0.18mm; the spacing between adjacent independent polyhedral structures is 0.1-0.15 mm, or 0.11mm, 0.12mm, 0.13mm and 0.14mm.

Further, the independent polyhedral structure included angle of the independent polyhedral structure comprises: the independent polyhedral structure angle is 1:2-2:1, or 1:1; height of the independent polyhedral structure: the width of the bottom surface of the independent polyhedral structure is 3:1-2:1 or 1:1.

Further, the independent polyhedral structures are distributed on the upper surface of the first area and the lower surface of the third area of the composite diffusion plate.

Further, the thickness of the diffusion plate is 0.5-4 mm, or 0.8mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm and 3.5mm; the thickness of the first area and the third area is 0.1-1.3 mm, or 0.8mm, 1.0mm, 1.1mm and 1.2mm; the thickness of the second region is 0.3-1.4 mm, or 0.5mm, 0.7mm, 0.9mm, 1.0mm, 1.1mm, 1.3mm.

Further, the optical film is covered on the polyhedral structure on the upper surface of the first area by using UV glue; the second region in the diffuser plate is a foamed quantum dot plate.

The utility model relates to a composite diffusion plate with an independent polyhedral structure, which adopts the following process method and comprises the following steps:

granulating the required materials through a granulator respectively, so as to obtain particles with uniform size;

uniformly mixing the particles in a specific proportion, and stirring for a specific time to obtain a mixed material;

feeding the mixed material into A, B, C three extruders; the three extruders respectively extrude molten materials, and the diffusion plate with three areas is obtained through hot pressing;

the diffusion plate passes through a roller engraved with an independent polyhedral structure, so that an upper layer structure area of a first area or a lower layer structure area of a third area of the diffusion plate is extruded out of the structure;

after the diffusion plate is pulled, shaping the diffusion plate after air cooling, and then conveying the diffusion plate to a film plate attaching stage;

and in the film plate attaching stage, one surface of the optical film coated with the UV adhesive is positioned above an upper structure area of the first area of the diffusion plate, and after being pressed out by the linkage roller, the optical film is cured by ultraviolet light to obtain the composite diffusion plate with an independent polyhedral structure.

When the composite diffusion plate with the independent polyhedral structure is cured by ultraviolet light, attention is paid to increasing the heat dissipation of the joint of the membrane plates, and the heat dissipation can be realized by adding a fan or adding a heat dissipation plate (made of metal, glass and the like) below the composite diffusion plate. Therefore, the warping condition of the film plate attached product can be effectively improved.

Compared with the prior art, the independent three-dimensional microstructure of the composite diffusion plate with the independent polyhedron structure can improve brightness loss and shielding property and disperse the internal stress of the diffusion plate, so that the warping problem of the composite diffusion plate with the independent polyhedron structure is reduced; meanwhile, heat dissipation is added at the ultraviolet irradiation curing position, so that the warping problem of the composite diffusion plate can be improved. Therefore, the problems of brightness loss, shielding property, warping and the like of the film plate attached product can be better improved through the independent three-dimensional microstructure and the increased heat dissipation during solidification.

Drawings

FIG. 1 is a schematic perspective view of a tetrahedral structure according to the present utility model

FIG. 2 is a schematic perspective view of the pentahedron structure of the present utility model

FIG. 3 is a perspective view of a hexahedral structure according to the present utility model

FIG. 4 is a schematic perspective view of a conical structure according to the present utility model

FIG. 5 is a schematic perspective view of a quadrangular frustum pyramid structure according to the present utility model

FIG. 6 is a schematic perspective view of a pentadactyle structure of the present utility model

FIG. 7 is a schematic perspective view of a hexagonal stage structure according to the present utility model

FIG. 8 is a schematic perspective view of a truncated cone structure according to the present utility model

FIG. 9 is a schematic view of a composite diffusion plate with independent pentahedron structure according to the present utility model-example 1

FIG. 10 is a schematic view of a composite diffusion plate with a double-sided structure of independent pentahedron according to the present utility model-example 2

FIG. 11 is a schematic view of a composite diffusion plate with independent pentahedron/truncated cone structure according to the present utility model-example 3

FIG. 12 is a schematic plan view of a composite diffusion plate having a continuous prism structure according to the present utility model-comparative example 1

FIG. 13 is a schematic plan view of a composite diffusion plate of the present utility model-comparative example 2 in a continuous semi-cylindrical structure

Wherein the included angle 1 of the independent polyhedron structure is 10-140 degrees;

the angle 2 of the independent polyhedron structure is 10-100 degrees;

the height 3 of the independent polyhedral structure is 0.01-0.1 mm;

the width 4 of the bottom surface of the independent polyhedral structure is 0.1-0.9 mm;

the edge length 5 of the independent polyhedral structure is 0.05-0.2 mm;

the width of the upper surface 6 of the independent polyhedral structure is 0.05-0.8 mm;

note that: the spacing between adjacent independent polyhedral structures is 0.1-0.15 mm.

Detailed Description

For a better understanding of the present utility model, its construction, and the functional features and advantages attained by the same, reference should be made to the accompanying drawings in which:

example 1

Referring to fig. 9, the present utility model provides a composite diffusion plate with independent pyramid microstructures, comprising a diffusion plate 7, wherein the diffusion plate is composed of three regions, and the first region 10 is a superstructure region; the second zone 13 is an intermediate zone; the third region 14 is a lower layer structure region. An optical film 8: the optical film 8 is covered with UV glue 9 on top of the pentahedron structure 11 of the first region 10. The upper surface of the first region 10 is engraved with an independent pentahedron structure 11, the transmitted light is collected again, the scattered light utilization rate is improved, the purpose of improving the front brightness is achieved, and meanwhile, the pentahedron structure 11 is an independent three-dimensional structure, so that the internal stress in the diffusion plate 7 can be dispersed, and the warping problem of the composite diffusion plate can be improved. Meanwhile, in the production process, heat dissipation is increased at the ultraviolet irradiation curing position, so that the problem of warping can be solved. Therefore, the problems of brightness loss, shielding property, warping and the like of the film plate attached product can be better improved through the independent three-dimensional microstructure, the heat dissipation increasing mode during solidification and the like.

Specifically, the optical film 8 includes one of various functional films having a brightening, diffusing or compound function; the optical film 8 having a brightness enhancing function is selected here. The diffuser plate 7 is composed of three sections, the first section 10 of the diffuser plate being a pentahedron structure 11 engraved on the upper surface of the upper layer 12. The first region 10 and the third region 14 are made of the same material, and plastic particles, such as polymethyl methacrylate (PMMA), polystyrene (PS), polycarbonate (PC), methyl methacrylate-styrene copolymer (MS), polyethylene terephthalate (PET), polypropylene (PP), and the like, which are mixed and extruded in proportion, may be selected. The diffusion masterbatch used is typically PMMA or PS. The anti-aging particles are generally various antioxidant organics. The second region 13 is a middle region, and is one of a common plate/a foaming plate/a quantum dot plate/a foaming quantum dot plate, and is usually formed by mixing plastic particles with other particles according to different functions, for example, a quantum dot plate is formed by mixing and extruding plastic particles, red quantum dots and green quantum dots.

The cross section of the structure of the independent pentahedron-structured composite diffusion plate is triangular convex. The problems of warping, brightness loss, shielding and the like can be improved by a separate structure, a mode of increasing heat dissipation during solidification and the like. And the advantages of simplifying the production process flow, improving the product competitiveness and yield and the like are maintained, and the application in the backlight module is greatly improved.

Example 2

Referring to fig. 10, the difference between this embodiment and embodiment 1 is: the first region 10 of the diffuser plate is engraved with a pentahedron structure 11 on the upper surface of an upper layer 12. Meanwhile, the lower surface of the lower layer 15 is engraved with a pentahedron structure 16 in the third region 14 of the diffusion plate, and the cross sections of the first region and the third region of the diffusion plate are triangular protrusions. By engraving the structure in the third area and increasing the incident light, the purpose of improving the front brightness and the shielding property is achieved by combining the two modes, and the purposes and the principles are the same as those of the embodiment 1 and are not explained one by one.

In the case of example 3,

referring to fig. 11, the difference between the present embodiment and embodiment 1 is: the first region 10 of the diffuser plate is engraved with a pentahedron structure 11 on the upper surface of an upper layer 12. Meanwhile, the third area 14 of the diffusion plate is engraved with a circular truncated cone structure 16 on the lower surface of the lower layer 15, the cross section of the first area structure of the diffusion plate is triangular convex, the cross section of the third area structure of the diffusion plate is trapezoidal convex, and the purposes of improving the front brightness and the shielding property are achieved by combining the two modes through engraving the structure in the third area, so that the purposes and the principles are the same as those of the embodiment 1, and are not explained one by one.

Comparative example 1

Referring to fig. 12, comparative example 1 is different from examples 1 to 3 in that the structure of comparative example 1 is a continuous prism structure and the heat dissipation is increased when cured, and the rest remains the same as example 1 and is not described herein. Comparative example 2

Referring to fig. 13, comparative example 1 differs from examples 1 to 3 in that the structure of comparative example 1 is a continuous semicircular structure and the rest remains the same as example 1 for increasing heat dissipation when cured, and is not described here again. The brightness losses of the examples and comparative examples are shown in Table 1

TABLE 1 loss of brightness for examples 1-3 and comparative examples 1-2

As can be seen from the test results of the above examples and comparative examples, the comparative examples 1-2 have a large loss of brightness (-15% to-14.5%) and the examples 1-3 have a small loss of brightness (-7.5 to-7%). Indicating that the independent stereoscopic structure can effectively reduce the brightness loss.

Samples of examples 1-3 and comparative examples 1-2 were placed in an oven at 85 c for 24 hours, the warp pairs for examples and comparative examples are shown in table 2,

TABLE 2 comparison of warpage of examples 1-3 and comparative examples 1-2

As can be seen from the test results of the above examples and comparative examples, the warpage of comparative examples 1-2 was large (13 mm to-27 mm), and the luminance loss of examples 1-3 was small (1 mm to-5 mm). The independent three-dimensional structure is shown to be effective in reducing warpage.

The foregoing description is only of the preferred embodiments of the present utility model, and is not intended to limit the scope of the present utility model. All equivalent changes and modifications made in accordance with the present utility model are intended to be covered by the scope of the appended claims.

Claims

1. A composite diffusion plate of independent polyhedral structure, comprising:

an optical film;

the method is characterized in that:

the optical film covers the polyhedral structure on the upper surface of the first area.

2. The composite diffusion plate of claim 1, wherein the independent polyhedral structure is an independent tetrahedron, a pentahedron, a hexahedron, a quadrangular frustum of a pyramid, a pentagonal frustum of a pyramid, a hexagonal frustum of a cone, a circular frustum of a cone.

3. The composite diffusion plate according to claim 1 or 2, wherein the independent polyhedral structure has an included angle of 10 ° to 140 °; the angle of the independent polyhedron structure is 10-100 degrees.

4. The composite diffusion plate according to claim 1 or 2, wherein the height of the independent polyhedral structure is 0.01 to 0.1mm; the width of the bottom surface of the independent polyhedral structure is 0.1-0.9 mm; the thickness of the side length of the independent polyhedron structure is 0.05-0.2 mm; the distance between the adjacent independent polyhedral structures is 0.1-0.15 mm.

5. The composite diffusion plate of claim 1 or 2, wherein the individual polyhedral structures have included angles of the individual polyhedral structures: the independent polyhedral structure angle is 1:2-2:1; height of the independent polyhedral structure: the width of the bottom surface of the independent polyhedral structure is 3:1-2:1.

6. The composite diffusion plate of claim 1 or 2, wherein the individual polyhedral structures are distributed on an upper surface of the first region and a lower surface of the third region of the composite diffusion plate.

7. The composite diffusion plate according to claim 1 or 2, wherein the diffusion plate has a thickness of 0.5 to 4mm; the thickness of the first area and the third area is 0.1-1.3 mm; the thickness of the second region is 0.3-1.4 mm.

8. The composite diffusion plate according to claim 1 or 2, wherein the optical film is a polyhedral structure covered on the upper surface of the first region by UV glue; the second region in the diffuser plate is a foamed quantum dot plate.

9. The composite diffusion plate of claim 1 or 2, wherein the independent polyhedral structure included angles are 20 °, 40 °, 50 °, 70 °, 90 ° or 120 °; the independent polyhedron structure angle is 20 degrees, 40 degrees, 50 degrees, 70 degrees or 90 degrees.

10. The composite diffusion plate of claim 1 or 2, wherein the height of the individual polyhedral structure is 0.02mm, 0.04mm, 0.05mm, 0.06mm, 0.08mm, or 0.09mm; the width of the bottom surface of the independent polyhedron structure is 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm or 0.8mm; the thickness of the side length of the independent polyhedron structure is 0.06mm, 0.08mm, 0.10mm, 0.14mm, 0.15mm or 0.18mm; the spacing between adjacent independent polyhedral structures is 0.11mm, 0.12mm, 0.13mm or 0.14mm.