CN111875747A - Method for manufacturing light guide plate with dot-matrix-free light guide characteristic - Google Patents
Method for manufacturing light guide plate with dot-matrix-free light guide characteristic Download PDFInfo
- Publication number
- CN111875747A CN111875747A CN202010771284.XA CN202010771284A CN111875747A CN 111875747 A CN111875747 A CN 111875747A CN 202010771284 A CN202010771284 A CN 202010771284A CN 111875747 A CN111875747 A CN 111875747A
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- CN
- China
- Prior art keywords
- light guide
- ultrafine particles
- transparent plastic
- guide plate
- polymer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 239000011882 ultra-fine particle Substances 0.000 claims abstract description 49
- 229920000642 polymer Polymers 0.000 claims abstract description 40
- 229920003023 plastic Polymers 0.000 claims abstract description 39
- 239000000758 substrate Substances 0.000 claims abstract description 18
- 239000004793 Polystyrene Substances 0.000 claims abstract description 12
- 229920002223 polystyrene Polymers 0.000 claims abstract description 12
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 8
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 8
- 239000004640 Melamine resin Substances 0.000 claims abstract description 4
- 229920000877 Melamine resin Polymers 0.000 claims abstract description 4
- 239000004677 Nylon Substances 0.000 claims abstract description 4
- 229920001778 nylon Polymers 0.000 claims abstract description 4
- 229920002239 polyacrylonitrile Polymers 0.000 claims abstract description 4
- 239000004417 polycarbonate Substances 0.000 claims abstract description 4
- 229920000515 polycarbonate Polymers 0.000 claims abstract description 4
- 229920000098 polyolefin Polymers 0.000 claims abstract description 4
- 239000004800 polyvinyl chloride Substances 0.000 claims abstract description 4
- 229920000915 polyvinyl chloride Polymers 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims description 11
- 239000000178 monomer Substances 0.000 claims description 3
- 238000006116 polymerization reaction Methods 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims 1
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 239000011159 matrix material Substances 0.000 abstract description 7
- 238000001746 injection moulding Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000000379 polymerizing effect Effects 0.000 description 2
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 1
- OZAIFHULBGXAKX-VAWYXSNFSA-N AIBN Substances N#CC(C)(C)\N=N\C(C)(C)C#N OZAIFHULBGXAKX-VAWYXSNFSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
- C08F265/04—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of esters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00663—Production of light guides
Abstract
The invention provides a method for manufacturing a light guide plate with dot-free light guide characteristics, which comprises the following steps: the transparent plastic substrate is made by uniformly dispersing ultrafine particles in a transparent plastic substrate, wherein the ultrafine particles are polymer ultrafine particles, the polymer ultrafine particles are made of one of polystyrene, polyvinyl chloride, nylon, acrylic resin, melamine resin and polyacrylonitrile, the transparent plastic substrate is made of one or more of acrylic resin, polystyrene, amorphous polyolefin and polycarbonate, and the addition amount of the polymer ultrafine particles in the transparent plastic substrate is 0.1-5%. The invention solves the problems that the backlight source in the prior art has obvious bright and dark areas due to the fact that light is guided by the light guide dot matrix, and the backlight source with completely uniform light rays is difficult to obtain.
Description
Technical Field
The invention relates to a method for manufacturing a light guide plate, in particular to a method for manufacturing a light guide plate with a dot-matrix-free light guide characteristic.
Background
With the continuous development of display technology, liquid crystal display devices have been widely used in electronic products such as smart phones, tablet computers, and notebooks. However, since the liquid crystal panel itself does not have a light emitting function, it is generally necessary to realize a display function by using a backlight as a light source. Backlight technology is widely used in the fields of liquid crystal display, instrument panels, billboards, signs, lamp boxes and the like, and has attracted much attention in recent years. Generally, backlights are classified into direct-lit type and edge-lit type. The direct type is that the light guide plate is positioned between the light source and the image. And the side light type light source is positioned at the side edge of the light guide plate. Among them, the edge-lit backlight has the advantages of small volume, light weight, uniform light, power saving, etc., and is the mainstream technology of the current backlight.
In the edge-light type backlight, the most important technology is a light guide plate for converting linear light into surface light, and the light guide plate is usually manufactured by manufacturing a light guide dot matrix on a transparent plastic plate according to different sizes and brightness, and converting the edge-light type light into the surface light by using the reflection and refraction of light. The light guide dot matrix is made through printing dot, carving lattice slot, injection molding with mold with carved lattice slot, etc. The methods are very complicated to manufacture, and simultaneously, when light guide plate products with different specifications are manufactured, the dot matrix needs to be recalculated or the mold needs to be manufactured again, so that the production efficiency of the method is greatly limited. In addition, the light guide dot matrix is used for guiding light, so that the backlight source has obvious bright and dark areas, and the backlight source with completely uniform light rays is difficult to obtain. Chinese patents CN1329264A and CN2431617Y both belong to the method.
Disclosure of Invention
The invention provides a method for manufacturing a light guide plate with a dot-matrix-free light guide characteristic, which aims to solve the problems that the light guide dot matrix is utilized to guide light in the prior art, so that obvious bright and dark areas appear in a backlight source, and the backlight source with completely uniform light rays is difficult to obtain.
In order to solve the above technical problems, the present invention provides a method for manufacturing a light guide plate having a dot-free light guiding characteristic, comprising the steps of: the transparent plastic substrate is made by uniformly dispersing ultrafine particles in a transparent plastic substrate, wherein the ultrafine particles are polymer ultrafine particles, the polymer ultrafine particles are made of one of polystyrene, polyvinyl chloride, nylon, acrylic resin, melamine resin and polyacrylonitrile, the transparent plastic substrate is made of one or more of acrylic resin, polystyrene, amorphous polyolefin and polycarbonate, and the addition amount of the polymer ultrafine particles in the transparent plastic substrate is 0.1-5%.
And (3) after the polymer ultrafine particles and the transparent plastic base material are fully mixed, an extrusion method is selected, and an extruder is used for sending out and forming to prepare the light guide plate.
After dispersing the polymer ultrafine particles in the transparent plastic monomer, pouring the polymer ultrafine particles into a mold by a pouring polymerization method, and polymerizing to obtain the light guide plate.
And (3) fully mixing the transparent plastic base material and the polymer ultrafine particles, and then preparing the light guide plate by injection molding by using an injection molding method.
The refractive index of the polymer ultrafine particles is 1.35-1.65.
The polymer ultrafine particle has the particle size of 0.1-50 microns.
The shape of the polymer ultrafine particles is spherical, cubic, flaky or rod-shaped.
The invention has the following beneficial effects: the invention provides a method for manufacturing a light guide plate with a dot-matrix-free light guide characteristic, which can easily and uniformly disperse polymer ultrafine particles in transparent plastic, so that the light guide plate is stable and convenient to prepare.
The ultrafine particles are polymer particles, and the polymer particles and the transparent plastic material have good compatibility, so the polymer ultrafine particles can be uniformly and stably dispersed in the transparent plastic. The invention uniformly disperses the ultrafine particles with different refractive indexes with the transparent plastic in the transparent plastic to prepare the light guide plate with wide application. The light guide plate of the invention has the characteristics of simple and convenient manufacture, convenient use, difficult damage, long service life and the like.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments.
The invention provides a method for manufacturing a light guide plate with dot-free light guide characteristics, which comprises the following steps: the transparent plastic substrate is made by uniformly dispersing ultrafine particles in a transparent plastic substrate, wherein the ultrafine particles are polymer ultrafine particles, the polymer ultrafine particles are made of one of polystyrene, polyvinyl chloride, nylon, acrylic resin, melamine resin and polyacrylonitrile, the transparent plastic substrate is made of one or more of acrylic resin, polystyrene, amorphous polyolefin and polycarbonate, and the addition amount of the polymer ultrafine particles in the transparent plastic substrate is 0.1-5%.
The implementation method for manufacturing the light guide plate can adopt the known plastic processing method:
(1) and (3) after the polymer ultrafine particles and the transparent plastic base material are fully mixed, an extrusion method is selected, and an extruder is used for sending out and forming to prepare the light guide plate.
(2) After dispersing the polymer ultrafine particles in the transparent plastic monomer, pouring the polymer ultrafine particles into a mold by a pouring polymerization method, and polymerizing to obtain the light guide plate.
(3) And (3) fully mixing the transparent plastic base material and the polymer ultrafine particles, and then preparing the light guide plate by injection molding by using an injection molding method.
The refractive index of the polymer ultrafine particles is 1.35-1.65. The polymer ultrafine particle has the particle size of 0.1-50 microns. The shape of the polymer ultrafine particles is spherical, cubic, flaky or rod-shaped.
Example one
100kg of styrene, 50 g of AIBN and 2kg of polymethyl methacrylate ultrafine particles are added into a 200L reaction kettle to react for 30 minutes at 90 ℃, then the mixture is transferred into a tower reactor, the temperature is gradually increased to 180 ℃ within 4 hours, and an extruder is used for granulation to obtain the polystyrene transparent plastic particles. And adding the obtained polystyrene particles into a single-screw extruder, wherein the extruder is provided with a plate making die head, and controlling the temperature of the extruder head to be 200 ℃ to obtain the transparent light guide-free lattice light guide plate.
The second embodiment:
and (3) adding the polystyrene particles obtained in the first embodiment into a single-screw extruder, wherein the extruder is provided with a plate-making die head, and controlling the temperature of the extruder head to be 200 ℃ to obtain the transparent light-guide-free dot matrix light guide plate.
The third embodiment is as follows:
and carrying out injection molding on the transparent polystyrene plastic particles prepared in the first embodiment to obtain the light guide plate.
The invention provides a method for manufacturing a light guide plate with a dot-matrix-free light guide characteristic, which can easily and uniformly disperse polymer ultrafine particles in transparent plastic, so that the light guide plate is stable and convenient to prepare.
The ultrafine particles are polymer particles, and the polymer particles and the transparent plastic material have good compatibility, so the polymer ultrafine particles can be uniformly and stably dispersed in the transparent plastic. The invention uniformly disperses the ultrafine particles with different refractive indexes with the transparent plastic in the transparent plastic to prepare the light guide plate with wide application. The light guide plate of the invention has the characteristics of simple and convenient manufacture, convenient use, difficult damage, long service life and the like.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (7)
1. A method for manufacturing a light guide plate with lattice-free light guide characteristics is characterized by comprising the following steps: the transparent plastic substrate is made by uniformly dispersing ultrafine particles in a transparent plastic substrate, wherein the ultrafine particles are polymer ultrafine particles, the polymer ultrafine particles are made of one of polystyrene, polyvinyl chloride, nylon, acrylic resin, melamine resin and polyacrylonitrile, the transparent plastic substrate is made of one or more of acrylic resin, polystyrene, amorphous polyolefin and polycarbonate, and the addition amount of the polymer ultrafine particles in the transparent plastic substrate is 0.1-5%.
2. The method of claim 1, wherein the polymer ultra-fine particles are mixed with the transparent plastic substrate, and then extruded by an extruder to form the light guide plate.
3. The method as claimed in claim 1, wherein the polymer ultra-fine particles are dispersed in a transparent plastic monomer, and then cast into a mold by casting polymerization, and polymerized to obtain the light guide plate.
4. The method of claim 1, wherein the transparent plastic substrate and the polymer ultrafine particles are mixed thoroughly, and then injection molded to form the light guide plate.
5. The method of claim 1, wherein the refractive index of the polymer ultrafine particles is 1.35-1.65.
6. The method of claim 1, wherein the polymer ultrafine particles have a particle size of 0.1-50 μm.
7. The method as claimed in claim 1, wherein the polymer ultrafine particles are in the shape of sphere, cube, sheet or rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010771284.XA CN111875747A (en) | 2020-08-04 | 2020-08-04 | Method for manufacturing light guide plate with dot-matrix-free light guide characteristic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010771284.XA CN111875747A (en) | 2020-08-04 | 2020-08-04 | Method for manufacturing light guide plate with dot-matrix-free light guide characteristic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111875747A true CN111875747A (en) | 2020-11-03 |
Family
ID=73210450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010771284.XA Pending CN111875747A (en) | 2020-08-04 | 2020-08-04 | Method for manufacturing light guide plate with dot-matrix-free light guide characteristic |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111875747A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1166510A (en) * | 1997-01-24 | 1997-12-03 | 华南理工大学 | High-scattering light-conducting organic glass and its preparation |
| JP2004026974A (en) * | 2002-06-25 | 2004-01-29 | Soken Chem & Eng Co Ltd | Polymer spherical particle having low refractive index, its manufacturing method, optical characteristic film using the particle, and image display device having the film |
| CN106496902A (en) * | 2016-11-18 | 2017-03-15 | 四川大学 | A kind of light scattering thermoplastic polyester composition |
| CN108570178A (en) * | 2018-04-12 | 2018-09-25 | 涌奇材料技术（上海）有限公司 | A kind of diffusing scattering film and its preparation method and application |
-
2020
- 2020-08-04 CN CN202010771284.XA patent/CN111875747A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1166510A (en) * | 1997-01-24 | 1997-12-03 | 华南理工大学 | High-scattering light-conducting organic glass and its preparation |
| JP2004026974A (en) * | 2002-06-25 | 2004-01-29 | Soken Chem & Eng Co Ltd | Polymer spherical particle having low refractive index, its manufacturing method, optical characteristic film using the particle, and image display device having the film |
| CN106496902A (en) * | 2016-11-18 | 2017-03-15 | 四川大学 | A kind of light scattering thermoplastic polyester composition |
| CN108570178A (en) * | 2018-04-12 | 2018-09-25 | 涌奇材料技术（上海）有限公司 | A kind of diffusing scattering film and its preparation method and application |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201103 |