CN112388931A - Diffusion plate suitable for side-entering light source and manufacturing method thereof - Google Patents
Diffusion plate suitable for side-entering light source and manufacturing method thereof Download PDFInfo
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- CN112388931A CN112388931A CN202011047364.7A CN202011047364A CN112388931A CN 112388931 A CN112388931 A CN 112388931A CN 202011047364 A CN202011047364 A CN 202011047364A CN 112388931 A CN112388931 A CN 112388931A
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- light
- electromagnet
- temperature
- plate
- light diffusion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
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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
- G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
- G02B5/0242—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles
-
- 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
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- 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
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Nonlinear Science (AREA)
- Mechanical Engineering (AREA)
- Dispersion Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Mathematical Physics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides a diffusion plate suitable for a side-in light source and a manufacturing method thereof, wherein the diffusion plate comprises the following steps: firstly, uniformly mixing magnetic powder and a high-temperature-resistant adhesive to prepare a magnetic high-temperature-resistant adhesive, and preparing light diffusion particles in a spraying mode; uniformly mixing the plastic master batches and the light diffusion particles, then putting the mixture into an extruder for blending and extruding, and injecting the extruded raw materials into a die with a rectangular groove to obtain a molten plastic plate; an electromagnet is placed on one side of a die, the magnetic induction intensity of the electromagnet is adjusted to 0.8-1.5T, the electromagnet is taken away after 5-10 minutes, a molten plastic plate is cooled and solidified to obtain a diffusion plate, and the density of light diffusion particles on one side, close to the electromagnet, of the diffusion plate is larger than that of light diffusion particles on one side, far away from the electromagnet, of the diffusion plate. The diffusion plate and the manufacturing method thereof can solve the problem of bright edges in the traditional side-in light guide structure, and have the advantages of simple manufacturing method and low manufacturing cost.
Description
Technical Field
The invention relates to the technical field of diffuser plate processing, in particular to a diffuser plate suitable for a side-entering light source and a manufacturing method thereof.
Background
As the industrial society develops into a highly information-oriented society, electronic display devices serving as media for displaying and transmitting various information are increasingly important. In particular, liquid crystal display devices combining liquid crystal and semiconductor technologies are widely used in various fields, but liquid crystals of such liquid crystal display devices cannot emit light themselves, and it is necessary to provide a light source behind the device and sufficiently diffuse light from the light source through a diffusion plate, so that the liquid crystal display device emits light softly and uniformly to display various clear image qualities.
As shown in fig. 1, in order to reduce the thickness of the lcd device, a lateral light source 3 is usually used, because the lateral light source 3 is disposed on one side of the light guide plate 2, a small amount of light is directly emitted from the edge of the conventional diffuser plate 1 without passing through the light guide plate 2, which causes the light at the position to be dense and the light-emitting brightness to be high, and after the lcd device is subsequently manufactured, the bright edge phenomenon is easily generated in the picture, which has a large defect.
Disclosure of Invention
In view of the above problems, the present invention provides a diffuser plate suitable for a side-entry light source and a manufacturing method thereof, which can solve the problem of bright edges in the conventional side-entry light guide structure, and has the advantages of simple manufacturing method and low manufacturing cost.
In order to achieve the purpose, the invention is solved by the following technical scheme:
a method for manufacturing a diffusion plate suitable for a side-in type light source comprises the following steps:
s1 preparation of light diffusing particles: preparing a light diffusion agent, a high-temperature-resistant adhesive and magnetic powder, uniformly mixing the magnetic powder and the high-temperature-resistant adhesive to prepare a magnetic high-temperature-resistant adhesive, spraying a layer of the magnetic high-temperature-resistant adhesive on the surface of the light diffusion agent in a spraying mode, and drying to prepare light diffusion particles;
s2 mixing and extruding: preparing plastic master batches and light diffusion particles, uniformly mixing the plastic master batches and the light diffusion particles, then putting the mixture into an extruder for blending and extruding, and injecting the extruded raw materials into a die with a rectangular groove to obtain a molten plastic plate;
preparation of S3 diffuser plate: an electromagnet is placed on one side of a die, the magnetic induction intensity of the electromagnet is adjusted to 0.8-1.5T, the electromagnet is taken away after 5-10 minutes, a molten plastic plate is cooled and solidified to obtain a diffusion plate, and the density of light diffusion particles on one side, close to the electromagnet, of the diffusion plate is larger than that of light diffusion particles on one side, far away from the electromagnet, of the diffusion plate.
Specifically, the step S1 is to perform a spraying operation in a turntable coater.
Specifically, the feeding mass ratio of the plastic master batch to the light diffusion particles in the step S2 is 100: 1-3.
Specifically, the light diffusant is selected from one or two of high-purity silicon dioxide powder and nano barium sulfate powder.
Specifically, the magnetic powder is selected from one or more of iron powder, cobalt powder and nickel powder.
Specifically, the processing temperature in the extruder in the step S2 is 170-200 ℃.
Specifically, the plastic master batch is selected from one of PVC and PS.
Specifically, the heat-resistant temperature of the cured high-temperature-resistant adhesive is not lower than 200 ℃, and the high-temperature-resistant adhesive is selected from one of high-temperature-resistant epoxy glue and silicone glass glue.
A diffusion plate suitable for a side-in light source is manufactured according to the manufacturing method.
The invention has the beneficial effects that:
the invention relates to a method for manufacturing a diffusion plate suitable for a side-entry light source, which comprises the steps of coating a layer of high-temperature-resistant adhesive mixed with magnetic powder on the surface of a light diffusion agent to prepare light diffusion particles, blending and extruding the light diffusion particles and plastic master batches, and then utilizing the magnetic adsorption effect of an electromagnet to ensure that the density of the light diffusion particles at one side of the diffusion plate close to the electromagnet is greater than that of the light diffusion particles at the side far away from the electromagnet.
Drawings
Fig. 1 is a schematic diagram of light guiding of a conventional diffuser plate, a light guiding plate, and a side-entry light source, wherein the surface of the conventional diffuser plate has a strong light intensity toward the side of the side-entry light source.
Fig. 2 is a schematic structural diagram of step S3, in which under the magnetic attraction of the electromagnet, the light diffusion particles are gathered toward the electromagnet, so that the density of the light diffusion particles in the diffusion plate is greater on the side toward the electromagnet than on the side away from the electromagnet.
Fig. 3 is a schematic structural view of a light diffusing particle.
The reference signs are: the light source comprises a traditional diffusion plate 1, a light guide plate 2, a side-in light source 3, light diffusion particles 4, a light diffusion agent 41, a high-temperature-resistant adhesive 42, magnetic powder 43, a molten plastic plate 5 and a diffusion plate 6.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the embodiments of the present invention are not limited thereto.
Referring to FIGS. 2 to 3: a method for manufacturing a diffusion plate suitable for a side-in type light source comprises the following steps:
s1 production of light-diffusing particles 4: preparing a light diffusion agent 41, a high temperature resistant adhesive 42 and magnetic powder 43, wherein the light diffusion agent 41 is high-purity silicon dioxide powder, the high temperature resistant adhesive 42 is high temperature resistant epoxy glue, the magnetic powder 43 is cobalt powder, since the cobalt powder is opaque powder, in order to reduce the influence of the cobalt powder on the light transmittance of the light diffusion particles 4, the particle size of the cobalt powder is much lower than that of the high purity silica powder, and the high temperature resistant epoxy glue is a transparent material, which can also reduce the influence on the light transmission of the light diffusion particles 4, and during the manufacturing, firstly, cobalt powder and high-temperature-resistant epoxy glue are put into a stirrer to be uniformly mixed to prepare the magnetic high-temperature-resistant adhesive, spraying a layer of magnetic high-temperature-resistant adhesive on the surface of high-purity silicon dioxide powder in a rotary disc gluing machine in a spraying mode, drying to obtain light diffusion particles 4, because the heat-resistant temperature of the high-temperature-resistant epoxy glue is higher, the light diffusion particles 4 can stably exist in a subsequent extruder;
s2 mixing and extruding: preparing PVC master batches and light diffusion particles 4, feeding the PVC master batches and the light diffusion particles 4 into another stirrer according to the feeding mass ratio of 100:2, uniformly mixing the PVC master batches and the light diffusion particles 4 in the stirrer, then jointly transferring the mixture into an extruder for blending and extruding, wherein the processing temperature in the extruder is 180 ℃, and injecting the extruded raw materials into a die with a rectangular groove to obtain a molten plastic plate 5;
s3 preparation of diffuser plate 5: place an electro-magnet in mould one side, adjust the magnetic induction intensity of electro-magnet to 1.5T, take away the electro-magnet after 6 minutes, obtain diffuser plate 5 after the solidification of melting plastics panel through cooling, the photodiffusion particle density that leans on to electro-magnet one side in diffuser plate 5 is greater than the photodiffusion particle density of keeping away from electro-magnet one side, during diffuser plate 5 during subsequent installation, can lean on the one side that photodiffusion particle density is big in the diffuser plate to place to light source one side, because in the formula light guide structure of inclining into, the light intensity that leans on to light source one side is stronger, utilize the photodiffusion particle of high density to refract the light, can reduce the luminous intensity of this side, consequently, can solve the bright border phenomenon that appears among the prior.
The above examples only show 1 embodiment of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A method for manufacturing a diffusion plate suitable for a side-in type light source is characterized by comprising the following steps:
s1 preparation of light diffusing particles: preparing a light diffusion agent, a high-temperature-resistant adhesive and magnetic powder, uniformly mixing the magnetic powder and the high-temperature-resistant adhesive to prepare a magnetic high-temperature-resistant adhesive, spraying a layer of the magnetic high-temperature-resistant adhesive on the surface of the light diffusion agent in a spraying mode, and drying to prepare light diffusion particles;
s2 mixing and extruding: preparing plastic master batches and light diffusion particles, uniformly mixing the plastic master batches and the light diffusion particles, then putting the mixture into an extruder for blending and extruding, and injecting the extruded raw materials into a die with a rectangular groove to obtain a molten plastic plate;
preparation of S3 diffuser plate: an electromagnet is placed on one side of a die, the magnetic induction intensity of the electromagnet is adjusted to 0.8-1.5T, the electromagnet is taken away after 5-10 minutes, a molten plastic plate is cooled and solidified to obtain a diffusion plate, and the density of light diffusion particles on one side, close to the electromagnet, of the diffusion plate is larger than that of light diffusion particles on one side, far away from the electromagnet, of the diffusion plate.
2. The method as claimed in claim 1, wherein the step S1 is performed by spraying in a rotary coater.
3. The method as claimed in claim 1, wherein the ratio of the plastic masterbatch to the light-diffusing particles in step S2 is 100: 1-3.
4. The method as claimed in claim 1, wherein the light diffuser is selected from one or two of high purity silica powder and nanometer barium sulfate powder.
5. The method as claimed in claim 1, wherein the magnetic powder is selected from one or more of iron powder, cobalt powder, and nickel powder.
6. The method as claimed in claim 1, wherein the processing temperature in the extruder in step S2 is 170-200 ℃.
7. The method as claimed in claim 6, wherein the plastic masterbatch is selected from one of PVC and PS.
8. The method as claimed in claim 6, wherein the heat resistant temperature of the cured high temperature resistant adhesive is not lower than 200 ℃, and the high temperature resistant adhesive is selected from one of high temperature resistant epoxy glue and silicone glass glue.
9. A diffuser plate suitable for a side-entry light source, which is manufactured by the manufacturing method of any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011047364.7A CN112388931A (en) | 2020-09-29 | 2020-09-29 | Diffusion plate suitable for side-entering light source and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011047364.7A CN112388931A (en) | 2020-09-29 | 2020-09-29 | Diffusion plate suitable for side-entering light source and manufacturing method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN112388931A true CN112388931A (en) | 2021-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011047364.7A Pending CN112388931A (en) | 2020-09-29 | 2020-09-29 | Diffusion plate suitable for side-entering light source and manufacturing method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100466039B1 (en) * | 2004-05-31 | 2005-01-14 | 주식회사 세코닉스 | Optical device for a display having tapered waveguides and process for making thereof |
| TW200712678A (en) * | 2005-09-27 | 2007-04-01 | Radiant Opto Electronics Corp | Diffuser for use in backlight module and method of making the same |
| JP2008015442A (en) * | 2006-07-03 | 2008-01-24 | Evonik Roehm Gmbh | Extruded polymer plate for anisotropic light scattering having high dimensional stability |
| CN202469747U (en) * | 2012-02-17 | 2012-10-03 | 青岛海信电器股份有限公司 | Sidelight-type backlight module and display device |
| CN204513110U (en) * | 2015-02-28 | 2015-07-29 | 青岛海信电器股份有限公司 | Backlight module and display unit |
| CN110119003A (en) * | 2018-07-25 | 2019-08-13 | 湖北费米拉曼光电科技有限公司 | A kind of guide-lighting diffusion integrated board and preparation method destroying total reflection based on gradient |
-
2020
- 2020-09-29 CN CN202011047364.7A patent/CN112388931A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100466039B1 (en) * | 2004-05-31 | 2005-01-14 | 주식회사 세코닉스 | Optical device for a display having tapered waveguides and process for making thereof |
| TW200712678A (en) * | 2005-09-27 | 2007-04-01 | Radiant Opto Electronics Corp | Diffuser for use in backlight module and method of making the same |
| JP2008015442A (en) * | 2006-07-03 | 2008-01-24 | Evonik Roehm Gmbh | Extruded polymer plate for anisotropic light scattering having high dimensional stability |
| CN202469747U (en) * | 2012-02-17 | 2012-10-03 | 青岛海信电器股份有限公司 | Sidelight-type backlight module and display device |
| CN204513110U (en) * | 2015-02-28 | 2015-07-29 | 青岛海信电器股份有限公司 | Backlight module and display unit |
| CN110119003A (en) * | 2018-07-25 | 2019-08-13 | 湖北费米拉曼光电科技有限公司 | A kind of guide-lighting diffusion integrated board and preparation method destroying total reflection based on gradient |
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Application publication date: 20210223 |
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| RJ01 | Rejection of invention patent application after publication |