CN219715786U - Diffusion plate with composite optical function and display device - Google Patents
Diffusion plate with composite optical function and display device Download PDFInfo
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- CN219715786U CN219715786U CN202321081207.7U CN202321081207U CN219715786U CN 219715786 U CN219715786 U CN 219715786U CN 202321081207 U CN202321081207 U CN 202321081207U CN 219715786 U CN219715786 U CN 219715786U
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- 238000009792 diffusion process Methods 0.000 title claims abstract description 99
- 230000003287 optical effect Effects 0.000 title claims abstract description 68
- 239000002131 composite material Substances 0.000 title claims abstract description 53
- 239000010410 layer Substances 0.000 claims description 167
- 230000002708 enhancing effect Effects 0.000 claims description 12
- 239000012790 adhesive layer Substances 0.000 claims description 10
- 239000000758 substrate Substances 0.000 claims description 10
- 150000001875 compounds Chemical class 0.000 claims description 5
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 4
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 4
- 239000004793 Polystyrene Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- -1 polyethylene terephthalate Polymers 0.000 claims description 3
- 230000008602 contraction Effects 0.000 claims description 2
- 229920002223 polystyrene Polymers 0.000 claims description 2
- 239000010408 film Substances 0.000 description 65
- 230000006870 function Effects 0.000 description 46
- 230000000694 effects Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 239000012788 optical film Substances 0.000 description 3
- 238000005282 brightening Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000000265 homogenisation Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000002355 dual-layer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 1
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Abstract
The embodiment of the utility model provides a composite optical function diffusion plate and a display device, wherein the composite optical function diffusion plate comprises a brightness enhancement film layer, a diffusion plate layer and a light homogenizing film layer which are sequentially stacked, and the brightness enhancement film layer and the light homogenizing film layer have the same expansion coefficient.
Description
Technical Field
The utility model relates to the technical field of optical films, in particular to a compound optical function diffusion plate and a display device.
Background
In the backlight module, the optical film belongs to a key optical component. In the related art, a part of the optical film has a composite film structure and belongs to a composite optical function diffusion plate. These composite optical function diffusion plates are liable to warp and deform, which has reduced influence on the optical performance of the composite optical function diffusion plates and the display effect of the backlight module.
Disclosure of Invention
The embodiment of the utility model provides a compound optical function diffusion plate and a display device, which can eliminate or at least reduce the warp deformation of the compound optical function diffusion plate and ensure the optical performance of the compound optical function diffusion plate and the display effect of a backlight module.
In one aspect, an embodiment of the present utility model provides a composite optical functional diffusion plate, including a brightness enhancement film layer, a diffusion plate layer, and a light homogenizing film layer that are sequentially stacked, where the brightness enhancement film layer and the light homogenizing film layer have the same expansion coefficient.
In some embodiments, the brightness enhancing film layer includes a diffusion structure sub-layer and a first prismatic sub-layer disposed in a stack, the first prismatic sub-layer being formed on a side of the diffusion structure sub-layer remote from the prismatic sub-layer.
In some embodiments, the first prismatic sub-layer includes a first substrate sub-layer having a first microprism portion formed on a side surface thereof remote from the diffusion structure sub-layer.
In some embodiments, the brightness enhancing film layer includes a second prismatic sub-layer formed between the diffusion structure sub-layer and the diffusion plate layer.
In some embodiments, the second prismatic sub-layer includes a second substrate sub-layer on which a second microprism portion is formed toward a side surface of the diffusion structure sub-layer.
In some embodiments, the brightness enhancing film layer and the diffusion sheet layer are bonded by a first adhesive layer, and the diffusion sheet layer and the light homogenizing film layer are bonded by a second adhesive layer.
In some embodiments, the prism array direction of the first prism sub-layer and the prism array direction of the second prism sub-layer are parallel.
In some embodiments, the diffusion plate layer is a polystyrene plate, and the brightness enhancement film layer and the light homogenizing film layer are respectively polyethylene terephthalate films.
In some embodiments, the direction of the acting force of the brightness enhancement film layer and the light homogenizing film layer on the diffusion plate layer is opposite and equal when the brightness enhancement film layer and the light homogenizing film layer are deformed due to thermal expansion, and the direction of the acting force of the brightness enhancement film layer and the light homogenizing film layer on the diffusion plate layer is opposite and equal when the brightness enhancement film layer and the light homogenizing film layer are deformed due to cold contraction.
In another aspect, an embodiment of the present utility model provides a display device including the composite optical function diffusion plate provided in any one of the above embodiments.
According to the embodiment of the utility model, the brightness enhancement film layers and the light homogenizing film layers with the same expansion coefficient are arranged on the two sides of the diffusion plate layer, when the diffusion plate with the composite optical function is heated or cooled, the brightness enhancement film layers and the light homogenizing film layers which are arranged on the two sides of the diffusion plate layer expand or contract synchronously, the brightness enhancement film layers and the light homogenizing film layers apply deformation acting forces with opposite directions and equal or relatively close magnitudes to the diffusion plate layer, so that the stress of the diffusion plate layer on the two sides is balanced or at least close to the balance, no obvious warping towards any side can occur, and further the diffusion plate with the composite optical function can not obviously warp towards any side, and the smooth or basically smooth surface shape can be kept, so that the warping deformation of the diffusion plate with the composite optical function is eliminated or at least reduced, and the optical performance of the diffusion plate with the composite optical function and the display effect of the backlight module are ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of a diffuser plate with multiple optical functions according to some embodiments of the present utility model;
FIG. 2 is another cross-sectional view of a diffuser plate with multiple optical functions according to some embodiments of the present utility model.
Description of main reference numerals:
10-brightness enhancement film layer, 11-diffusion structure sub-layer, 12-first prism sub-layer, 121-first substrate sub-layer, 122-first microprism portion, 13-second prism sub-layer, 131-second substrate sub-layer, 132-second microprism portion, 20-diffusion plate layer, 30-light homogenizing film layer, 40-first adhesive layer, 50-second adhesive layer.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
"A and/or B" includes the following three combinations: only a, only B, and combinations of a and B.
The use of "adapted" or "configured" in this disclosure is meant to be an open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps. In addition, the use of "based on" is intended to be open and inclusive in that a process, step, calculation, or other action "based on" one or more of the stated conditions or values may be based on additional conditions or beyond the stated values in practice.
In the present utility model, the term "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described as "exemplary" in this disclosure is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the utility model. In the following description, details are set forth for purposes of explanation. It will be apparent to one of ordinary skill in the art that the present utility model may be practiced without these specific details. In other instances, well-known structures and processes have not been described in detail so as not to obscure the description of the utility model with unnecessary detail. Thus, the present utility model is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
In the related art, a composite optical function diffusion plate is generally composed of a brightness enhancement film and a diffusion plate, the brightness enhancement film and the diffusion plate having different expansion coefficients; wherein, the expansion coefficient of the brightening film is higher, and the expansion coefficient of the diffusion plate is lower. When heated, the two materials expand asynchronously, so that the diffusion plate with the composite optical function warps towards one side of the diffusion plate; after cooling to normal temperature, the two components shrink asynchronously, so that the diffusion plate with the composite optical function warps towards one side of the brightening film. Therefore, the composite optical function diffusion plate is easy to warp and deform, so that the surface of the composite optical function diffusion plate is uneven, and the optical performance of the composite optical function diffusion plate and the display effect of the backlight module are reduced.
As shown in fig. 1, in one aspect, an embodiment of the present utility model provides a composite optical function diffusion plate, which can eliminate or at least reduce the warp deformation of the composite optical function diffusion plate, and ensure the optical performance of the composite optical function diffusion plate and the display effect of the backlight module. The composite optical function diffusion plate comprises a brightness enhancement film layer 10, a diffusion plate layer 20 and a light homogenizing film layer 30, wherein the brightness enhancement film layer 10, the diffusion plate layer 20 and the light homogenizing film layer 30 are sequentially laminated. Wherein the brightness enhancing film layer 10 and the light homogenizing film layer 30 have the same expansion coefficient.
When the diffusion plate with the composite optical function is heated or cooled, the brightness enhancement film layer 10 and the light homogenizing film layer 30 which are positioned at two sides of the diffusion plate layer 20 expand or contract synchronously, and the brightness enhancement film layer 10 and the light homogenizing film layer 30 apply deformation acting forces with opposite directions and equal or relatively close magnitudes to the diffusion plate layer 20, so that the stress balance or at least close to the balance of the diffusion plate layer 20 at two sides can not generate obvious warping towards any side. Therefore, the stress structure of the composite optical function diffusion plate is relatively balanced when the composite optical function diffusion plate expands with heat and contracts with cold, the composite optical function diffusion plate can not obviously warp towards any side, and the surface shape of the composite optical function diffusion plate can be kept flat or basically flat, so that the warp deformation of the composite optical function diffusion plate is eliminated or at least reduced, and the optical performance of the composite optical function diffusion plate and the display effect of the backlight module are ensured.
The layer structure of the brightness enhancing film layer 10 may be determined according to practical needs, and the embodiment of the present utility model is not limited thereto. In some embodiments, the brightness enhancing film layer 10 may include a diffusion structure sub-layer 11 and a first prismatic sub-layer 12 stacked in this order, the first prismatic sub-layer 12 being formed on a side of the diffusion structure sub-layer 11 remote from the prismatic sub-layer. In some examples, the side of the brightness enhancement film layer 10, which is located on the side of the diffusion structure sub-layer 11 away from the first prism sub-layer 12, is not provided with other prism sub-layer structures, and is directly connected with the diffusion layer 20 by the diffusion structure sub-layer 11, so that the brightness enhancement film layer 10 has a single-layer brightness enhancement structure capable of performing optical gain and a diffusion structure capable of realizing visual effect homogenization, and realizes a composite optical function. In addition, the light homogenizing film layer 30 can perform a better light homogenizing function, the brightness enhancing film layer 10 can perform a better brightness enhancing and light diffusing function, and the diffusion plate layer 20 can perform a better light diffusing function, so that the diffusion plate with the composite optical function has a better optical performance.
In some examples, the first prism sub-layer 12 may include a first substrate sub-layer 121, and a first microprism portion 122 is formed on a side surface of the first substrate sub-layer 121 remote from the diffusion structure sub-layer 11. Similarly, the forming manner of the first microprism portion 122 may be determined according to practical needs, and may be a process manner such as roll forming, integral injection molding, etc., which is not limited in the embodiment of the present utility model.
In other examples, the brightness enhancement film layer 10 may include a first prism sub-layer 12, a diffusion structure sub-layer 11, and a second prism sub-layer 13 that are sequentially stacked, where the second prism sub-layer 13 is formed between the diffusion structure sub-layer 11 and the diffusion plate layer 20, so that the brightness enhancement film layer 10 has a dual-layer brightness enhancement structure that can perform high-efficiency optical gain and a diffusion structure that can achieve visual effect homogenization, and achieves a more desirable composite optical function.
Illustratively, the second prism sub-layer 13 may include a second substrate sub-layer 131, and a second microprism portion 132 is formed on a side surface of the second substrate sub-layer 131 facing the diffusion structure sub-layer 11. Similarly, the forming manner of the second microprism portion 132 may be determined according to practical needs, and may be a process manner such as roll forming, integral injection molding, etc., which is not limited in the embodiment of the present utility model.
The arrangement relationship between the prism array directions of the first prism sub-layer 12 and the second prism sub-layer 13 may be determined according to actual needs, and the embodiment of the present utility model is not limited thereto. In some examples, the prism array direction of the first prism sub-layer 12 and the prism array direction of the second prism sub-layer 13 are parallel, forming a superposition enhancement effect.
In some embodiments, the diffusion plate layer 20 may be a Polystyrene (PS) plate, and the brightness enhancement film layer 10 and the light homogenizing film layer 30 may be polyethylene terephthalate (polyethylene glycol terephthalate, PET) films, respectively. Because the brightness enhancement film layer 10 and the light homogenizing film layer 30 are made of the same material, the brightness enhancement film layer and the light homogenizing film layer have the same expansion coefficient, and the stress balance effect is ensured.
In some embodiments, the forces of the brightness enhancing film layer 10 and the light homogenizing film layer 30 on the diffusion plate layer 20 are opposite and equal in magnitude when thermally expanded, and the forces of the brightness enhancing film layer 10 and the light homogenizing film layer 30 on the diffusion plate layer 20 are opposite and equal in magnitude when cold contracted. Here, the above-described result of the setting of the acting force can be achieved by setting the structures of the brightness enhancement film layer 10 and the light homogenizing film layer 30. Therefore, when the composite optical function diffusion plate expands with heat and contracts with cold, the stress balance of the diffusion plate layers 20 on two sides is guaranteed to offset each other, so that the composite optical function diffusion plate cannot warp and deform to any side, the smooth surface shape is always kept, and the optical performance of the composite optical function diffusion plate and the display effect of the backlight module are guaranteed.
The forming mode of the composite optical function diffusion plate can be determined according to actual needs, and the embodiment of the utility model is not limited to the forming mode. In some embodiments, the layers of the diffusion plate with the composite optical function can be formed into an integral composite structure by bonding and pressing after being independently formed; as shown in fig. 2, the brightness enhancing film layer 10 and the diffusion sheet layer 20 may be bonded through the first adhesive layer 40, and the diffusion sheet layer 20 and the light homogenizing film layer 30 may be bonded through the second adhesive layer 50. The types of the first adhesive layer 40 and the second adhesive layer 50 may be determined according to actual needs, and transparent glue types such as UV glue may be used, which is not limited in the embodiment of the present utility model. In other embodiments, as shown in fig. 1, the composite optical diffuser plate may be integrally formed by a coextrusion process, so as to directly manufacture the composite membrane having a multi-layer structure.
As shown in fig. 1 to 2, in another aspect, an embodiment of the present utility model provides a display device, including the composite optical function diffusion plate provided in any one of the above embodiments. The type of the display device may be determined according to actual needs, and may be, for example, a product with a display function, such as a television, a display, an intelligent terminal, or a component thereof, which is not limited by the embodiment of the present utility model.
The above description has been made in detail on the composite optical function diffusion plate and the display device provided by the embodiment of the present utility model, and specific examples are applied herein to illustrate the principle and implementation of the present utility model, and the above description of the embodiment is only used to help understand the method and core idea of the present utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present utility model, the present description should not be construed as limiting the present utility model.
Claims (10)
1. The utility model provides a compound optical function diffuser plate, its characterized in that includes the enhancement film layer, diffusion sheet layer and the even light rete that stack gradually and set up, enhancement film layer with even light rete has the same coefficient of expansion.
2. The composite optical diffuser plate of claim 1 wherein the brightness enhancement film layer comprises a diffusion structure sub-layer and a first prismatic sub-layer disposed in a stack, the first prismatic sub-layer being formed on a side of the diffusion structure sub-layer remote from the prismatic sub-layer.
3. The composite optical diffuser plate of claim 2 wherein the first prismatic sub-layer comprises a first substrate sub-layer having a first microprism portion formed on a side surface thereof remote from the diffuser structure sub-layer.
4. The composite optical diffuser plate of claim 2 wherein the brightness enhancing film layer comprises a second prismatic sub-layer formed between the diffusion structure sub-layer and the diffusion plate layer.
5. The composite optical diffuser plate of claim 4 wherein the second prismatic sub-layer comprises a second substrate sub-layer having a second microprism formed thereon on a side surface facing the diffusion structure sub-layer.
6. The composite optical diffuser plate of claim 4 wherein the prism array direction of the first prism sub-layer and the prism array direction of the second prism sub-layer are parallel.
7. The composite optical diffuser plate of claim 1 wherein the brightness enhancement film layer and the diffuser plate layer are bonded by a first adhesive layer and the diffuser plate layer and the light homogenizing film layer are bonded by a second adhesive layer.
8. The composite optical diffuser plate of claim 1 wherein the diffuser plate layer is polystyrene sheet material and the brightness enhancement film layer and the light homogenizing film layer are polyethylene terephthalate film sheets, respectively.
9. The composite optical function diffusion plate according to claim 1, wherein the acting force of the brightness enhancement film layer and the light homogenizing film layer on the diffusion plate layer is opposite and equal in direction when in thermal expansion deformation, and the acting force of the brightness enhancement film layer and the light homogenizing film layer on the diffusion plate layer is opposite and equal in direction when in cold contraction deformation.
10. A display device comprising the composite optical function diffusion plate according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321081207.7U CN219715786U (en) | 2023-05-06 | 2023-05-06 | Diffusion plate with composite optical function and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321081207.7U CN219715786U (en) | 2023-05-06 | 2023-05-06 | Diffusion plate with composite optical function and display device |
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| Publication Number | Publication Date |
|---|---|
| CN219715786U true CN219715786U (en) | 2023-09-19 |
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|---|---|---|---|
| CN202321081207.7U Active CN219715786U (en) | 2023-05-06 | 2023-05-06 | Diffusion plate with composite optical function and display device |
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| Country | Link |
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| CN (1) | CN219715786U (en) |
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2023
- 2023-05-06 CN CN202321081207.7U patent/CN219715786U/en active Active
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