CN206990983U - A kind of micro- composite membrane for LCD backlight module - Google Patents
A kind of micro- composite membrane for LCD backlight module Download PDFInfo
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- CN206990983U CN206990983U CN201720838329.4U CN201720838329U CN206990983U CN 206990983 U CN206990983 U CN 206990983U CN 201720838329 U CN201720838329 U CN 201720838329U CN 206990983 U CN206990983 U CN 206990983U
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- 239000002131 composite material Substances 0.000 title claims abstract description 31
- 239000012528 membrane Substances 0.000 title claims abstract description 16
- 238000010030 laminating Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 6
- 239000000758 substrate Substances 0.000 claims description 15
- 239000004973 liquid crystal related substance Substances 0.000 claims description 13
- 239000010410 layer Substances 0.000 claims description 9
- 239000012790 adhesive layer Substances 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 239000011324 bead Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 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 abstract 2
- 238000010276 construction Methods 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 4
- 238000013178 mathematical model Methods 0.000 description 4
- 239000011295 pitch Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000013329 compounding Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012826 global research Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Laminated Bodies (AREA)
- Optical Elements Other Than Lenses (AREA)
- Liquid Crystal (AREA)
Abstract
A kind of micro- composite membrane for LCD backlight module, including micro- permeable membrane, prism film and laminating layer；Micro- permeable membrane is made up of the micro- structure being evenly distributed in the first PET base material；Prism film is made up of multiple prism structures being arranged in parallel within the second PET base material；Prism structure is respectively a comprising three kinds of height, b, c the first prism striped, the second prism striped and prism striped, and three kinds of height meet following relation：a≦32μm；a≧1.3b；b≧1.2c.Micro- permeable membrane and prism film are combined into an entirety by the application by laminating layer, form a micro- composite membrane with absolute construction, and its thickness is the 1/3 of traditional diaphragm, meets the product ultrathin market demand, is significantly less than traditional diaphragm thickness.In addition, the composite membrane of the application employs the design of micro- permeable membrane, lower prism film, prism film adds lustre to, micro- permeable membrane optically focused, greatly strengthen the optics briliancy of micro- composite membrane, can obtain preferably add lustre to, spotlight effect.
Description
Technical Field
The utility model relates to an optics diaphragm that can be arranged in LCD backlight unit especially relates to a little compound film that passes through for LCD backlight unit.
Background
Liquid crystal display is one of the fastest technical fields in the world development, and with the rapid development of liquid crystal televisions, notebook computers, liquid crystal mobile phones, tablet computers and the like, the ultra-thinning of the liquid crystal display becomes a hot spot of global research. The backlight module is an important part of the liquid crystal industry chain, and accounts for more than 20% of the cost of the liquid crystal screen, and the traditional backlight module is mainly formed by assembling four membranes of a lower diffusion film, a lower prism film, an upper prism film and an upper diffusion film, needs to be assembled piece by piece, and has the defects of long production time consumption, low assembly efficiency, high reject ratio and the like.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the present invention is to provide a micro-transparent composite film for a backlight module of a liquid crystal display to reduce or avoid the aforementioned problems.
In order to solve the technical problem, the utility model provides a micro-transparent composite film for a liquid crystal display backlight module, which comprises a micro-transparent film, a prism film and an attaching layer which is uniformly coated between the micro-transparent film and the prism film and is made of solvent-free UV adhesive for laminating and bonding the micro-transparent film and the prism film into a whole; the micro-transparent film consists of a micro-transparent structure consisting of a plurality of micro-lenses uniformly distributed on a first PET substrate, wherein the diameter of each micro-lens is 12-20 mu m, and the height of each micro-lens is 15-20 mu m; the prism film consists of a plurality of prism structures which are arranged on the second PET base material in parallel; the prism structure comprises a plurality of prism stripes, the interval of the prism stripes is between 40 and 72 mu m, and the height of the prism stripes is between 20 and 32 mu m; the thickness of the micro-permeable composite membrane is 310 mu m; the prism structure of the prism film comprises a first prism stripe, a second prism stripe and a third prism stripe with three heights of a, b and c respectively, wherein the three heights satisfy the following relations: a ≦ 32 μm; a ≧ 1.3 b; b ≧ 1.2 c; the micro-transparent structure of the micro-transparent film comprises three first micro-lenses, second micro-lenses and third micro-lenses with the diameters of d, e and f respectively, and the three diameters satisfy the following relations: d ≦ 20 μm; d ≧ 1.2 e; e ≧ 1.2 f.
Preferably, the first PET substrate of the micro-permeable film is bonded to the prism structure of the prism film through the bonding layer, and one side of the second PET substrate of the prism film is uniformly bonded with a plurality of transparent beads through a bonding layer.
Preferably, the thermal expansion coefficient of the second PET substrate of the prism film is Tp, the thermal expansion coefficient of the prism structure of the prism film is Ta, and the thermal expansion coefficient of the adhesive layer is Tb, where Tp < Ta; tp < Tb; tb is ≧ Ta.
Preferably, the first prism stripes, the second prism stripes, and the third prism stripes on the second PET substrate of the prism film are Na, Nb, and Nc in numbers, respectively, which satisfy the following relationship: na ≧ Nb; nb ≧ Nc.
This application will pass through a membrane and a prism membrane a whole through the laminating layer complex, forms a little through complex film that has an independent structure, and its thickness is 1/3 of traditional diaphragm, satisfies the product and surpasses thinization market demand, is less than traditional diaphragm thickness greatly, and optical property is good, packaging efficiency improves 100%, and cost reduction 15%. In addition, the composite film adopts the design of the upper micro-transparent film and the lower prism film, the prism film enhances the light and condenses light through the micro-transparent film, the optical brightness of the micro-transparent composite film is greatly enhanced, and better light enhancing and condensing effects can be obtained.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein,
fig. 1 is a schematic structural view of a micro-transparent composite film for a backlight module of a liquid crystal display according to an embodiment of the present invention;
fig. 2 is an exploded perspective view of the micro-permeable composite membrane shown in fig. 1.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings. Wherein like parts are given like reference numerals.
As described in the background section, the conventional backlight module is assembled from a plurality of films, and different films are easy to scratch the surface during transportation, and scratches are also formed due to operation during mutual assembly, so that the defects of long production time consumption, low assembly efficiency, high reject ratio and the like exist in the one-by-one assembly. In view of the above problems in the prior art, the present application provides a micro-transparent composite film for a backlight module of a liquid crystal display, which compounds two sheets of film into a whole by a solvent-free UV adhesive to form a micro-transparent composite film with an independent structure, and the specific structure is shown in fig. 1-2, which respectively show a schematic structural diagram and an exploded perspective view of a micro-transparent composite film for a backlight module of a liquid crystal display according to an embodiment of the present invention.
Referring to fig. 1-2, a transflective composite film of the present application, generally designated by reference numeral 1, includes a transflective film 100, a prism film 200, and a lamination layer 300 made of a solvent-free UV adhesive uniformly applied between the transflective film 100 and the prism film 200 to laminate and bond the two together. Specifically, as shown in the figure, the micro-permeable film 100 is composed of a micro-permeable structure 12 composed of a plurality of micro-lenses uniformly distributed on a first PET substrate 11, and as shown in the figure, the diameter of the micro-lenses is between 12 and 20 μm, and the height of the micro-lenses is between 15 and 20 μm; the prism film 200 is composed of a plurality of prism structures 22 arranged in parallel on a second PET substrate 21, the prism structures 22 include a plurality of prism stripes, as shown in the figure, the pitch of the prism stripes is between 40-72 μm, and the height is between 20-32 μm; the thickness of the finally formed micro-transparent composite film is 280-320 μm, and the thickness of the micro-transparent composite film is most preferably 310 μm.
This application forms a little through complex film that has an independent structure through compounding two diaphragms into a whole through solvent-free UV adhesive, and its thickness is 1/3 of traditional diaphragm, satisfies the product and surpasses thinization market demand, is less than traditional diaphragm thickness (>2000 mu m) greatly, and optical property is good, packaging efficiency improves 100%, and cost reduction 15%. In addition, the composite film adopts the design of the upper micro-transparent film and the lower prism film, the prism film enhances the light and condenses light through the micro-transparent film, the optical brightness of the micro-transparent composite film is greatly enhanced, and better light enhancing and condensing effects can be obtained.
Further, as shown in the figure, the first PET substrate 11 of the micro-permeable film 100 is adhered to the prism structure 22 of the prism film 200 by the adhesive layer 300, and one side of the second PET substrate 21 of the prism film 200 is uniformly adhered with a plurality of transparent beads 500 by an adhesive layer 400. The transparent beads 500 integrally bonded to the lower prism film 200 can be used to adjust the haze of the composite film and prevent light absorption of a light guide plate (not shown) in contact with the lower prism film 200.
In addition, in one embodiment, the prism Film 200 may be a Brightness Enhancement Film (BEF) having a structure for eliminating moire fringes, that is, the prism structures 22 on the prism Film 200 may include at least three or more prism fringes with different pitches and heights, so as to disturb the regular arrangement of the prism fringes, eliminate the regular Brightness variation caused by the regular arrangement of the prism fringes, and reduce or eliminate moire fringes generated between the prism sheet and the LCD panel. Meanwhile, the irregular arrangement and combination of the prism stripes obviously improve the uniformity of the brightness of the reflected light of the prisms, improve the utilization rate of the illumination light and further improve the brightness of the LCD.
The micro-transparent film 100 may also have a structure for eliminating moire fringes, that is, the micro-lens structure 12 on the micro-transparent film 100 may also include at least three kinds of micro-lenses with different diameters and heights.
Furthermore, in order to overcome the defect that the prior art cannot accurately suppress the moire fringes, the present application further provides a mathematical model which can be directly adopted by those skilled in the art, and those skilled in the art can accurately reduce the moire fringes according to the following mathematical model. That is, as shown in the illustrated embodiment, the prism fringes on the prism film 200 have a pitch of 40-72 μm and a height of 20-32 μm. In another mathematical model, the prism structure 22 of the prism film 200 includes three first, second, and third prism stripes 221, 222, 223 having heights a, b, c, respectively, which satisfy the following relationships: a ≦ 32 μm; a ≧ 1.3 b; b ≧ 1.2 c. In yet another mathematical model, the micro-transparent structure 12 of the micro-transparent film 100 comprises three kinds of first 121, second 122 and third 123 micro-lenses with diameters d, e, f, respectively, which satisfy the following relations: d ≦ 20 μm; d ≧ 1.2 e; e ≧ 1.2 f. In addition, the numbers of the first prism stripes 221, the second prism stripes 222, and the third prism stripes 223 on the second PET base material 21 of the prism film 200 are Na, Nb, and Nc, respectively, and satisfy the following relationship: na ≧ Nb; nb ≧ Nc.
Further, in order to minimize the thermal deformation of the micro-transparent composite film 1, improve the optical brightness, and improve the production efficiency and quality, in a specific embodiment, the thermal expansion coefficient of the second PET substrate 21 of the prism film 200 is Tp, the thermal expansion coefficient of the prism structure 22 of the prism film 200 is Ta, and the thermal expansion coefficient of the adhesive layer 300 is Tb, where Tp < Ta; tp < Tb; tb is ≧ Ta. The skilled person can refer to the above parameter combinations and select appropriate materials to manufacture the preferred micro-transparent composite film 1 of this embodiment, so as to realize minimum deformation of the micro-transparent composite film 1 under the condition of being heated, thereby improving the optical brightness of the LCD backlight module, that is, improving the product quality, reducing the product defects and rework, and improving the production efficiency.
Further, in a further embodiment, the adhesion force of the prism structure 22 of the prism film 200 is Ba, and the adhesion force of the adhesive layer 300 is Bb, where Bb ≧ Ba. That is to say, in this embodiment, the adhesion force of the adhesion layer 300 for bonding the prism film 200 of the present application together is preferably greater than, or at least equal to, the adhesion force of the prism structure 22 attached to the prism film 200, so that the structure strength and the thermal deformation will have better characteristics, the optical brightness of the LCD backlight module is further improved, and the product quality and the production efficiency are improved.
It is to be understood by those skilled in the art that while the present invention has been described in terms of several embodiments, it is not intended that each embodiment cover a separate embodiment. The description is given for clearness of understanding only, and it is to be understood that all matters in the embodiments are to be interpreted as including all technical equivalents which are encompassed by the claims.
The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes, modifications and combinations that may be made by those skilled in the art without departing from the spirit and principles of the invention should be considered within the scope of the invention.
Claims (4)
1. The micro-transparent composite film for the backlight module of the liquid crystal display is characterized in that the micro-transparent composite film (1) comprises a micro-transparent film (100), a prism film (200) and a laminating layer (300) which is uniformly coated between the micro-transparent film (100) and the prism film (200) and is made of solvent-free UV adhesive for laminating and bonding the micro-transparent film and the prism film into a whole; the micro-transparent film (100) is composed of a micro-transparent structure (12) consisting of a plurality of micro-lenses which are uniformly distributed on a first PET substrate (11), the diameter of each micro-lens is 12-20 mu m, and the height of each micro-lens is 15-20 mu m; the prism film (200) is composed of a plurality of prism structures (22) which are arranged on a second PET base material (21) in parallel; the prism structure comprises a plurality of prism stripes, the interval of the prism stripes is between 40 and 72 mu m, and the height of the prism stripes is between 20 and 32 mu m; the thickness of the micro-permeable composite membrane is 310 mu m; the prism structure (22) of the prism film (200) includes a first prism stripe (221), a second prism stripe (222), and a third prism stripe (223) having three heights a, b, and c, respectively, which satisfy the following relationships: a ≦ 32 μm; a ≧ 1.3 b; b ≧ 1.2 c; the micro-transparent structure (12) of the micro-transparent film (100) comprises three types of first micro-lenses (121), second micro-lenses (122) and third micro-lenses (123) with diameters d, e and f respectively, and the three diameters satisfy the following relations: d ≦ 20 μm; d ≧ 1.2 e; e ≧ 1.2 f.
2. The transflective composite film according to claim 1, wherein the second PET substrate (21) of the prism film (200) has a thermal expansion coefficient Tp, the prism structure (22) of the prism film (200) has a thermal expansion coefficient Ta, and the adhesive layer (300) has a thermal expansion coefficient Tb, wherein Tp < Ta; tp < Tb; tb is ≧ Ta.
3. A transflective composite film according to claim 2, wherein the first PET substrate (11) of the transflective film (100) is bonded to the prism structure (22) of the prism film (200) by the bonding layer (300), and the second PET substrate (21) of the prism film (200) is uniformly bonded to the transparent beads (500) by a bonding layer (400).
4. A transflective composite film according to claim 1, wherein the first prism stripes (221), the second prism stripes (222) and the third prism stripes (223) on the second PET substrate (21) of the prism film (200) are Na, Nb, Nc in numbers, respectively, which satisfy the following relationship: na ≧ Nb; nb ≧ Nc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720838329.4U CN206990983U (en) | 2017-07-11 | 2017-07-11 | A kind of micro- composite membrane for LCD backlight module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720838329.4U CN206990983U (en) | 2017-07-11 | 2017-07-11 | A kind of micro- composite membrane for LCD backlight module |
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| Publication Number | Publication Date |
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| CN206990983U true CN206990983U (en) | 2018-02-09 |
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| CN201720838329.4U Active CN206990983U (en) | 2017-07-11 | 2017-07-11 | A kind of micro- composite membrane for LCD backlight module |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109814185A (en) * | 2019-03-27 | 2019-05-28 | 江苏双星彩塑新材料股份有限公司 | A kind of micro- composite membrane of large scale and preparation method thereof |
| CN114280705A (en) * | 2021-12-31 | 2022-04-05 | 凯鑫森(上海)功能性薄膜产业股份有限公司 | Preparation method of anti-interference stain-resistant adhesive film, adhesive film and screen |
-
2017
- 2017-07-11 CN CN201720838329.4U patent/CN206990983U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109814185A (en) * | 2019-03-27 | 2019-05-28 | 江苏双星彩塑新材料股份有限公司 | A kind of micro- composite membrane of large scale and preparation method thereof |
| CN114280705A (en) * | 2021-12-31 | 2022-04-05 | 凯鑫森(上海)功能性薄膜产业股份有限公司 | Preparation method of anti-interference stain-resistant adhesive film, adhesive film and screen |
| CN114280705B (en) * | 2021-12-31 | 2023-08-15 | 凯鑫森(上海)功能性薄膜产业股份有限公司 | Preparation method of interference-resistant and stain-resistant laminating film, laminating film and screen |
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