CN206892378U - A kind of composite membrane that adds lustre to for LCD backlight module - Google Patents
A kind of composite membrane that adds lustre to for LCD backlight module Download PDFInfo
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- CN206892378U CN206892378U CN201720838341.5U CN201720838341U CN206892378U CN 206892378 U CN206892378 U CN 206892378U CN 201720838341 U CN201720838341 U CN 201720838341U CN 206892378 U CN206892378 U CN 206892378U
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- 239000002131 composite material Substances 0.000 title claims abstract description 30
- 239000012528 membrane Substances 0.000 title abstract description 7
- 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 title abstract 3
- 238000010030 laminating Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims abstract description 5
- 239000004973 liquid crystal related substance Substances 0.000 claims description 13
- 239000000758 substrate Substances 0.000 claims description 12
- 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
- 230000003287 optical effect Effects 0.000 abstract description 8
- 238000004806 packaging method and process Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract 1
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 4
- 239000011295 pitch Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000013178 mathematical model Methods 0.000 description 3
- 238000005282 brightening Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000013329 compounding 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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- Liquid Crystal (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
A kind of composite membrane that adds lustre to for LCD backlight module, including the first prism film, the second prism film and laminating layer；First prism film and the second prism film are formed by multiple prism structures being arranged in parallel within PET base material；The prism structure of first prism film 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≦30μm；a≧1.1b；b≧1.3c.First prism film and the second prism film are combined into an entirety by the application by laminating layer, form a composite membrane that adds lustre to absolute construction, its thickness is the 1/3 of traditional diaphragm, meet the product ultrathin market demand, it is significantly less than traditional diaphragm thickness, and good in optical property, packaging efficiency improve 200%, cost reduces by 15%.In addition, the composite membrane of the application employs the design of upper and lower double prism structure, optics briliancy is added, more preferable light enhancing effect can be obtained compared to individual layer prism film.
Description
Technical Field
The utility model relates to an optics diaphragm that can be arranged in LCD backlight unit especially relates to a light intensifying complex film that is used 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 light intensifying 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 brightness enhancement composite film for a liquid crystal display backlight module, which comprises a first prism film, a second prism film and an attaching layer which is uniformly coated between the first prism film and the second prism film and is made of solvent-free UV adhesive for laminating and bonding the first prism film and the second prism film into a whole; the first prism film and the second prism film are both composed of a plurality of prism structures which are arranged on the PET base material in parallel; the prism structure comprises a plurality of prism stripes, the interval of the prism stripes is between 30 and 70 μm, and the height of the prism stripes is between 20 and 30 μm; the prism stripes on the first prism film and the second prism film are mutually vertical; the thickness of the light-intensifying composite film is 320 mu m; the prism structure of the first prism film includes a first prism stripe, a second prism stripe, and a third prism stripe having three heights a, b, and c, respectively, and the three heights satisfy the following relationship: a ≦ 30 μm; a ≧ 1.1 b; b ≧ 1.3 c.
Preferably, the PET substrate of the first prism film is bonded to the prism structure of the second prism film through the bonding layer, and a plurality of transparent beads are uniformly bonded to one side of the PET substrate of the second prism film through a bonding layer.
Preferably, the thermal expansion coefficient of the PET substrate included in the first prism film and the second prism film is Tp, the thermal expansion coefficient of the prism structure of the first prism film and the second 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 PET substrate of the first prism film are Na, Nb, and Nc in numbers, respectively, which satisfy the following relationship: na ≧ Nb; nb ≧ Nc.
The utility model discloses a brightening composite film compounds into a whole with first prism membrane and second prism membrane through the laminating layer, forms a brightening composite film that has independent structure, and its thickness is the 1/3 of traditional diaphragm, satisfies the ultra-thin market demand of product, is less than traditional diaphragm thickness greatly, and optical property is good, packaging efficiency improves 200%, cost reduction 15%. In addition, the composite film adopts the design of an upper prism structure and a lower prism structure, increases the optical brightness, and can obtain a better light enhancement effect compared with a single-layer prism film.
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 diagram of a light intensifying 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 light intensifying composite film 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 light-intensifying 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 light-intensifying composite film having 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 light-intensifying composite film for a backlight module of a liquid crystal display according to an embodiment of the present invention.
Referring to fig. 1-2, the brightness enhancement composite film of the present application, generally designated by reference numeral 1, includes a first prism film 100, a second prism film 200, and a lamination layer 300 made of a solvent-free UV adhesive uniformly applied between the first prism film 100 and the second prism film 200 to laminate and bond the two films together. Specifically, as shown in the figure, the first prism film 100 and the second prism film 200 are each composed of a plurality of prism structures 12 arranged in parallel on a PET substrate 11, and the prism structures 12 include a plurality of prism stripes, and as shown in the figure, the prism stripes have a pitch of 30-70 μm and a height of 20-30 μm; wherein the prism stripes on the first prism film 100 and the second prism film 200 are perpendicular to each other; the thickness of the finally formed light-intensifying composite film is 280-320 mu m, and the thickness of the light-intensifying composite film is most preferably 320 mu m.
This application forms a light intensifying complex film that has independent structure through compounding into a whole with two diaphragms 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 (>1000 mu m) greatly, and optical property is good, packaging efficiency improves 200%, and cost reduction 15%. In addition, the composite film adopts the design of an upper prism structure and a lower prism structure, increases the optical brightness, and can obtain a better light enhancement effect compared with a single-layer prism film.
Further, as shown in the figure, the PET substrate 11 of the first prism film 100 is bonded to the prism structure 12 of the second prism film 200 through the adhesive layer 300, and the PET substrate 11 side of the second prism film 200 is uniformly bonded with a plurality of transparent beads 500 through an adhesive layer 400. The transparent beads 500 integrally bonded to the lower second 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 second prism film 200.
In addition, in one embodiment, the first and second prism films 100 and 200 may have the identical structure, or may have the structure having the same operation principle but a little difference, or may also have different structures.
For example, the first prism Film 100 may be a Brightness Enhancement Film (BEF) having a structure for eliminating moire fringes, that is, the prism structures 12 on the first prism Film 100 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 the 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 second prism film 200 may be a brightness enhancement film having a structure for eliminating moire fringes, and the structure of the second prism film may be identical to that of the first prism film 100, and of course, the second prism film 200 may be another brightness enhancement film having a structure for eliminating moire fringes, which is different from that of the first prism film 100, that is, the prism structure 12 on the second prism film 200 may include at least three or more prism fringes with different pitches and heights.
Alternatively, the second prism film 200 may be a brightness enhancement film of a general structure on which the prism structures 12 are regularly arranged.
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 embodiment, the pitch of the prism stripes on the first and second prism films 100 and 200 is between 30-70 μm and the height is between 20-30 μm; and the prism fringes on the first and second prism films 100 and 200 are perpendicular to each other. In another mathematical model, the prism structure 12 of at least the first prism film 100 includes three first prism stripes 121, second prism stripes 122, and third prism stripes 123 having heights a, b, and c, respectively, which satisfy the following relationships: a ≦ 30 μm; a ≧ 1.1 b; b ≧ 1.3 c. In addition, the numbers of the first prism stripes 121, the second prism stripes 122, and the third prism stripes 123 on the PET base material 11 of the first prism film 100 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 brightness enhancement composite film 1, improve the optical brightness, and improve the production efficiency and quality, in a specific embodiment, the thermal expansion coefficient of the PET substrate 11 included in the first prism film 100 and the second prism film 200 is Tp, the thermal expansion coefficient of the prism structure 12 of the first prism film 100 and the second 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 brightness enhancement composite film 1 of the present embodiment, so as to realize minimum deformation of the brightness enhancement 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 another embodiment, the adhesion force of the prism structures 12 of the first prism film 100 and the second prism film 200 is set to be Ba, and the adhesion force of the adhesive layer 300 is set to be Bb, where Bb ≧ Ba. That is to say, in the present embodiment, the adhesion force of the adhesion layer 300 for bonding the first prism film 100 and the second prism film 200 of the present application together is preferably greater than, or at least equal to, the adhesion force of the prism structure 12 attached to the first prism film 100 and the second prism film 200, so that the LCD backlight module will have better characteristics in structural strength and thermal deformation, further improve the optical brightness of the LCD backlight module, and improve the product quality and the production efficiency.
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 intensifying composite film for the backlight module of the liquid crystal display is characterized in that the intensifying composite film (1) comprises a first prism film (100), a second prism film (200) and a jointing layer (300) which is uniformly coated between the first prism film (100) and the second prism film (200) and is made of solvent-free UV adhesive for laminating and bonding the first prism film and the second prism film into a whole; the first prism film (100) and the second prism film (200) are both composed of a plurality of prism structures (12) which are arranged on a PET base material (11) in parallel; the prism structure (12) comprises a plurality of prism stripes, the pitch of the prism stripes is between 30 and 70 μm, and the height of the prism stripes is between 20 and 30 μm; the prism stripes on the first prism film (100) and the second prism film (200) are perpendicular to each other; the thickness of the light-intensifying composite film is 320 mu m; the prism structure (12) of the first prism film (100) comprises at least a first prism stripe (121), a second prism stripe (122) and a third prism stripe (123) with three heights a, b and c, respectively, wherein the three heights satisfy the following relations: a ≦ 30 μm; a ≧ 1.1 b; b ≧ 1.3 c.
2. The light-intensifying composite film according to claim 1, wherein the PET substrate (11) included in the first prism film (100) and the second prism film (200) has a thermal expansion coefficient Tp, the prism structures (12) of the first prism film (100) and the second prism film (200) have 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. The brightness enhancement composite film according to claim 2, wherein the PET substrate (11) of the first prism film (100) is bonded to the prism structure (12) of the second prism film (200) via the bonding layer (300), and the PET substrate (11) side of the second prism film (200) is uniformly bonded with a plurality of transparent beads (500) via a bonding layer (400).
4. The light intensifying composite film according to claim 1, wherein the numbers of the first prism stripes (121), the second prism stripes (122) and the third prism stripes (123) on the PET substrate (11) of the first prism film (100) are Na, Nb, Nc, respectively, and the numbers satisfy the following relationship: na ≧ Nb; nb ≧ Nc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720838341.5U CN206892378U (en) | 2017-07-11 | 2017-07-11 | A kind of composite membrane that adds lustre to for LCD backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720838341.5U CN206892378U (en) | 2017-07-11 | 2017-07-11 | A kind of composite membrane that adds lustre to for LCD backlight module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206892378U true CN206892378U (en) | 2018-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720838341.5U Active CN206892378U (en) | 2017-07-11 | 2017-07-11 | A kind of composite membrane that adds lustre to for LCD backlight module |
Country Status (1)
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| CN (1) | CN206892378U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112230463A (en) * | 2020-10-09 | 2021-01-15 | 东莞市光志光电有限公司 | Brightness enhancement film, pressing wheel and preparation method of pressing wheel |
| CN118151274A (en) * | 2024-01-24 | 2024-06-07 | 安徽晟华光学科技有限公司 | Prism film meeting TCO viewing angle |
-
2017
- 2017-07-11 CN CN201720838341.5U patent/CN206892378U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112230463A (en) * | 2020-10-09 | 2021-01-15 | 东莞市光志光电有限公司 | Brightness enhancement film, pressing wheel and preparation method of pressing wheel |
| CN118151274A (en) * | 2024-01-24 | 2024-06-07 | 安徽晟华光学科技有限公司 | Prism film meeting TCO viewing angle |
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