CN111897037B - Brightness enhancement film, manufacturing method thereof and backlight module - Google Patents
Brightness enhancement film, manufacturing method thereof and backlight module Download PDFInfo
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- CN111897037B CN111897037B CN202010793155.0A CN202010793155A CN111897037B CN 111897037 B CN111897037 B CN 111897037B CN 202010793155 A CN202010793155 A CN 202010793155A CN 111897037 B CN111897037 B CN 111897037B
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- enhancement film
- brightness enhancement
- backlight module
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 239000000758 substrate Substances 0.000 claims abstract description 24
- 239000002096 quantum dot Substances 0.000 claims abstract description 18
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 239000011347 resin Substances 0.000 claims abstract description 8
- 229920005989 resin Polymers 0.000 claims abstract description 8
- 238000003848 UV Light-Curing Methods 0.000 claims abstract description 4
- 239000011248 coating agent Substances 0.000 claims abstract description 4
- 238000000576 coating method Methods 0.000 claims abstract description 4
- 238000003825 pressing Methods 0.000 claims abstract description 4
- 239000012528 membrane Substances 0.000 claims description 12
- VQLYBLABXAHUDN-UHFFFAOYSA-N bis(4-fluorophenyl)-methyl-(1,2,4-triazol-1-ylmethyl)silane;methyl n-(1h-benzimidazol-2-yl)carbamate Chemical compound C1=CC=C2NC(NC(=O)OC)=NC2=C1.C=1C=C(F)C=CC=1[Si](C=1C=CC(F)=CC=1)(C)CN1C=NC=N1 VQLYBLABXAHUDN-UHFFFAOYSA-N 0.000 claims description 10
- 238000003698 laser cutting Methods 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 5
- 239000010408 film Substances 0.000 description 41
- 238000000034 method Methods 0.000 description 6
- 239000002390 adhesive tape Substances 0.000 description 5
- 239000004065 semiconductor Substances 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- -1 Polyethylene Terephthalate Polymers 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000012788 optical film Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
- G02B5/0231—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having microprismatic or micropyramidal shape
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0268—Diffusing elements; Afocal elements characterized by the fabrication or manufacturing method
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention relates to a brightness enhancement film, a manufacturing method thereof and a backlight module. The manufacturing method comprises the following steps: coating resin on the surface of the substrate layer; pressing the resin by a die to form a plurality of prism units which are arranged in parallel; forming a prism structure layer by UV curing the plurality of prism units to obtain a brightness enhancement film raw material; the raw material of the brightness enhancement film is cut into a preset size through laser, so that a blackening layer is formed on the periphery of the base material layer, and the brightness enhancement film is obtained. The brightness enhancement film can be used for a quantum dot backlight module or a display device, and can effectively shield blue light leaked from the failure edge of the quantum dot film, so that the display effect is improved.
Description
Technical Field
The invention relates to the technical field of backlight, in particular to a brightness enhancement film, a manufacturing method thereof and a backlight module.
Background
Quantum dots (quantum dots) are nano-scale semiconductors that emit light of a specific frequency by applying a certain electric field or light pressure to the nano-semiconductor material, and the frequency of the emitted light varies with the size of the semiconductor, so that the color of the emitted light can be controlled by adjusting the size of the nano-semiconductor, which is called quantum dots because it has a characteristic of confining electrons and Electron holes (Electron holes), which is similar to atoms or molecules in the natural world.
The quantum dot technology enables an LCD (liquid crystal display) to be realized in a wide color field, is an ideal technology for 4K-level picture information, and can greatly improve the color reproducibility, the color saturation, the overall brightness and the like of picture images. However, the quantum dot film has an unavoidable defect that a part of quantum layer on the edge of the cut film material is damaged by water and oxygen, and a failure edge of a certain area appears, and the failure edge of the part cannot excite the blue light of the blue light LED into white light, so that the phenomenon of blue light on the periphery is caused.
The normal quantum dot membrane is shaded and is applied to TV and flat board at present, and its LCD module frame width broad, the shading of frame is glued and can be effectively sheltered from the blue light, prevents to appear leaking the blue light phenomenon. The frame of the backlight module of the existing mobile electronic product is narrower than that of a TV and a flat-panel LCD module, and the leaked blue light cannot be absorbed by the shading adhesive tape, so that the blue phenomenon appears around the LCD module.
The brightness enhancement film is an optical film commonly used in a backlight module and has the function of gathering light emitted by a light source to the direction of a user of the display equipment, so that the display brightness is improved. The existing brightness enhancement film is simple in structure and single in effect, and does not have the effect of improving blue light leakage to the backlight module using the quantum dot film.
Disclosure of Invention
The invention aims to provide a brightness enhancement film, a manufacturing method thereof and a backlight module, which can shield blue light leaked from a failure edge of a quantum dot film so as to improve the display effect.
The utility model provides a membrane adds lustre to, includes substrate layer and prism structural layer, the prism structural layer is located on the substrate layer, the prism structural layer includes a plurality of parallel arrangement's prism unit, the outer peripheral face of substrate layer is equipped with the blackening layer that is formed by the laser cutting.
Furthermore, the thickness of the blackening layer is 0.1 mm-1 mm.
Further, the cross section of the prism unit is triangular, semicircular or trapezoidal.
A manufacturing method of a brightness enhancement film comprises the following steps:
coating resin on the surface of the substrate layer;
pressing the resin by a die to form a plurality of prism units which are arranged in parallel;
forming a prism structure layer by UV curing the plurality of prism units to obtain a brightness enhancement film raw material;
the raw material of the brightness enhancement film is cut into a preset size through laser, so that a blackening layer is formed on the periphery of the base material layer, and the brightness enhancement film is obtained.
A backlight module comprises an upper bright enhancement film, a lower bright enhancement film, a quantum dot film, a light guide plate and a reflector plate which are stacked from top to bottom, wherein a light source is arranged on one side of the light guide plate; go up the membrane of adding lustre to and the membrane of adding lustre to down includes substrate layer and prism structural layer, the prism structural layer is located on the substrate layer, the prism structural layer includes a plurality of parallel arrangement's prism unit, the outer peripheral face of substrate layer is equipped with the blackened layer that is formed by the laser cutting.
Furthermore, a blackening layer formed by laser cutting is arranged on one side, close to the periphery of the bright enhancement film, of the prism structure layer.
Furthermore, the thickness of the blackening layer is 0.1 mm-1 mm.
Further, the cross section of the prism unit is triangular, semicircular or trapezoidal.
Further, the extending direction of the prism unit of the upper brightness enhancement film is orthogonal to the extending direction of the prism unit of the lower brightness enhancement film.
Compared with the prior art, the invention has the beneficial effects that: the bright enhancement film is processed through laser cutting to form an opaque blackened layer at the periphery of the bright enhancement film, so that blue light leaking from the failure edge of the quantum dot film can be prevented from entering the bright enhancement film, and the purpose of improving the blue light leakage phenomenon of the quantum dot film backlight structure is achieved. Compared with the existing method of shielding blue light through the shading adhesive tape, the method has the advantages that the processing is simple and convenient on one hand by shielding the blue light through the blackening layer, the blackening layer is formed while cutting, and no additional process is needed; on the other hand, the shading adhesive tape can be saved, thereby reducing the cost and the thickness of the backlight structure.
Drawings
Fig. 1 is a schematic structural view of a brightness enhancement film according to the present invention.
Fig. 2 is a schematic structural diagram of a backlight module according to the present invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
As shown in fig. 1, in a preferred embodiment, the brightness enhancement film of the present invention mainly includes a substrate layer 1 and a prism structure layer 2, the substrate layer 1 is made of Polyethylene Terephthalate (PET) or Polycarbonate (PC), and the prism structure layer 2 is disposed on a surface of the substrate layer 1, wherein the prism structure layer 2 includes a plurality of prism units 3, extending directions of the prism units 3 are parallel, and the prism units 3 are preferably formed as triangular prisms, that is, the cross section is triangular, but not limited thereto, in other embodiments, the cross section of the prism units 3 may be semicircular or trapezoidal.
The outer peripheral face of substrate layer 1 is equipped with the lighttight blackened layer 4 that is formed by laser cutting, and in this embodiment, the thickness on blackened layer 4 is preferably 0.1mm ~1mm, and this thickness can shelter from the blue light that spills from quantum dot membrane inefficacy limit when guaranteeing not to shelter from normal light to improve and leak blue light phenomenon, improve display effect. In a preferred embodiment, the prism structure layer 2 is provided with the black layer 4 on the side close to the periphery of the brightness enhancement film, so that the light shielding effect of the black layer 4 is improved.
The embodiment of the invention also discloses a manufacturing method of the brightness enhancement film, which comprises the following steps: coating resin on the surface of the substrate layer; pressing the resin by a die to form a plurality of prism units which are arranged in parallel; forming a prism structure layer by UV curing the plurality of prism units to obtain a brightness enhancement film raw material; the raw material of the brightness enhancement film is cut into a preset size through laser, so that a blackening layer is formed on the periphery of the base material layer, and the brightness enhancement film is obtained.
The embodiment of the invention also discloses a backlight module which comprises any one of the bright enhancement films provided by the embodiment of the invention. In a preferred embodiment, the backlight module includes an upper brightness enhancement film 5, a lower brightness enhancement film 6, a quantum dot film 7, a light guide plate 8, and a reflective sheet 9 stacked from top to bottom, and a light source 10 is disposed on one side of the light guide plate 8.
Wherein, go up the membrane of adding lustre to 5 and all adopt the same structure with membrane of adding lustre to 6 down, including substrate layer 1 and prism structural layer 2, on substrate layer 1 was located to prism structural layer 2, prism structural layer 2 included a plurality of parallel arrangement's prism unit 3, and the outer peripheral face of substrate layer 1 is equipped with the blackening layer 4 that is formed by the laser cutting. The blackening layer 4 can prevent blue light leaked from the failure edge of the quantum dot film 7 from entering the brightness enhancement film, and the purpose of improving the blue light leakage phenomenon of the backlight structure of the quantum dot film 7 is achieved. Compared with the existing method of shielding blue light through the shading adhesive tape, the method has the advantages that the processing is simple and convenient on one hand by shielding the blue light through the blackening layer 4, the blackening layer 4 is formed while cutting, and no additional process is needed; on the other hand, the shading adhesive tape can be saved, thereby reducing the cost and the thickness of the backlight structure.
In order to improve the effect of brightness enhancement by the brightness enhancement film, the extending direction of the prism unit 3 of the upper brightness enhancement film 5 is orthogonal to the extending direction of the prism unit 3 of the lower brightness enhancement film 6.
In the description of the present invention, it is to be understood that terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, which indicate orientations or positional relationships, are used based on the orientations or positional relationships shown in the drawings only for the convenience of describing the present invention and for the simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
While the invention has been described in conjunction with the specific embodiments set forth above, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the spirit and scope of the appended claims.
Claims (8)
1. The utility model provides a membrane adds lustre to, includes substrate layer and prism structural layer, the prism structural layer is located on the substrate layer, the prism structural layer includes a plurality of parallel arrangement's prism unit, its characterized in that, the outer peripheral face of substrate layer with one side that the prism structural layer is close to the membrane periphery that adds lustre to is equipped with the blackening layer that is formed by the laser cutting.
2. The brightness enhancement film according to claim 1, wherein the blackening layer has a thickness of 0.1 to 1 mm.
3. The brightness enhancement film according to claim 1, wherein the prism unit has a triangular, semicircular or trapezoidal cross section.
4. The manufacturing method of the brightness enhancement film is characterized by comprising the following steps:
coating resin on the surface of the substrate layer;
pressing the resin by a die to form a plurality of prism units which are arranged in parallel;
forming a prism structure layer by UV curing the plurality of prism units to obtain a brightness enhancement film raw material;
the raw material of the brightness enhancement film is cut into a preset size through laser, so that a blackening layer is formed on the periphery of the substrate layer and one side of the prism structure layer close to the periphery of the brightness enhancement film, and the brightness enhancement film is obtained.
5. A backlight module is characterized by comprising an upper brightness enhancement film, a lower brightness enhancement film, a quantum dot film, a light guide plate and a reflector plate which are stacked from top to bottom, wherein a light source is arranged on one side of the light guide plate; go up the membrane of adding lustre to and the membrane of adding lustre to down includes substrate layer and prism structural layer, the prism structural layer is located on the substrate layer, the prism structural layer includes a plurality of parallel arrangement's prism unit, the outer peripheral face of substrate layer with one side that the prism structural layer is close to the membrane periphery of adding lustre to is equipped with the blackened layer that is formed by the laser cutting.
6. The backlight module as claimed in claim 5, wherein the blackening layer has a thickness of 0.1mm to 1 mm.
7. The backlight module according to claim 5, wherein the prism units have a triangular, semicircular or trapezoidal cross section.
8. The backlight module as claimed in claim 5, wherein the extending direction of the prism units of the upper brightness enhancement film is orthogonal to the extending direction of the prism units of the lower brightness enhancement film.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010793155.0A CN111897037B (en) | 2020-08-10 | 2020-08-10 | Brightness enhancement film, manufacturing method thereof and backlight module |
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| CN202010793155.0A CN111897037B (en) | 2020-08-10 | 2020-08-10 | Brightness enhancement film, manufacturing method thereof and backlight module |
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| CN111897037A CN111897037A (en) | 2020-11-06 |
| CN111897037B true CN111897037B (en) | 2022-06-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114253032B (en) * | 2021-12-22 | 2024-03-26 | 广州华星光电半导体显示技术有限公司 | LCD device |
| CN114952034A (en) * | 2022-06-23 | 2022-08-30 | 义乌清越光电技术研究院有限公司 | Cutting control method, device, system and display device for quantum dot film |
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