CN1329264A - Method for producing liquid crystal display light conductor plate by using cast polymerization process - Google Patents
Method for producing liquid crystal display light conductor plate by using cast polymerization process Download PDFInfo
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- CN1329264A CN1329264A CN 01129556 CN01129556A CN1329264A CN 1329264 A CN1329264 A CN 1329264A CN 01129556 CN01129556 CN 01129556 CN 01129556 A CN01129556 A CN 01129556A CN 1329264 A CN1329264 A CN 1329264A
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- guide plate
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Abstract
A method for manufacturing light-conducting plate of liquid crystal display by using cast-in polymerization process includes the following steps: preparing double-wedge mould for cast-in polymerization, mixing methyl alpha-methacrylate and polymerization starting agent, prepolymerizing the above-mentioned mixture, pulping the above-mentioned prepolymerized mixture, casting the above-mentioned pulped mixture into the mould to implement polymerization, and finally demoulding so as to obtain double-wedge transparent yakeli resin light-conducting plate. This invention is specicially suitable for manufacturing light-conducting plate with larger size for liquid crystal display.
Description
The present invention relates to the preparation of the light guide plate (" light guide or photoconductive plate) of LCD (LCD), particularly utilize the method that polymerization is made the light guide plate that the large-size LCD uses that is cast into.
The back lighting device of LCD (backlight device) is divided into two kinds of direct-injection type and side-light types (edge or sidelight), respectively as shown in Figures 1 and 2.In Fig. 1, Fig. 1 (a) is the cut-open view of Fig. 1 (b), and the back lighting device of direct-injection type comprises a light source 10 of arranging, and reflecting plate 12 and diffuser plate 14 are located at two of the front and back of light source 10 respectively.The side-light type back lighting device of Fig. 2 comprises the light source 20 that is positioned at light guide plate 22 sides, and around light reflector 24, front and back two faces of light guide plate 22 also are respectively equipped with diffuser plate 26 and reflecting plate 28 around the light source 20, and wherein Fig. 2 (a) is the cut-open view of Fig. 2 (b).And the side-light type back lighting device is considered factors such as different brightness, weight and light sources consume electric power, can divide into monolateral, bilateral again and three kinds of modes such as three limit light inlets.Device shown in Figure 2 is unilateral, in Fig. 3 (a) and Fig. 3 (b), then disposes bilateral light source 30 and three marginal ray sources 34 in light guide plate 32 and 36 sides respectively.
In the side-light type back lighting device, the flat board of light guide plate for using acryl (PMMA) material to make, its effect is that light source is imported from side, is transformed into uniform surface light source through light scattering again.Light guide plate generally is to utilize acryl grain ejection formation (injection) or use dull and stereotyped acryl.
For impelling light guide plate to obtain uniform briliancy, all be different from the material of acrylic plate refractive index (refractive index) usually, or directly form the plane of refraction of different angles on the light guide plate surface at the surface printing of light guide plate.Fig. 4 to Fig. 6 shows three kinds of common embodiment, and wherein Fig. 3-6 (a) is all the cut-open view of Fig. 3-6 (b).Device shown in Figure 4 is to form the transparent resin ink lay 38 that contains light diffusing particles on the one side of light guide plate 22.Device shown in Figure 5 is to make coarse 40 on the one side of light guide plate 22, makes it form male and fomale(M﹠F).Device shown in Figure 6 is to dig to penetrate indenture 42 on the one side of light guide plate 22, makes it form serrated face.
Yet for the LCD of large-size, for example 12 inches (inch) above persons use dull and stereotyped acryl just to seem too heavy as light guide plate.The shape that changes light guide plate can address this problem.But, use ejection forming technique to make light guide plate, its size and thickness difference are very restricted, and are difficult to realize purpose.Therefore, the large scale liquid crystal display light guide plate of volume production still adopts dull and stereotyped acryl at present.
Fundamental purpose of the present invention provides a kind of new preparation method of LCD light guide plate.
An inferior purpose of the present invention provides the LCD light guide plate of a kind of double-wedge (double wedge) and makes the mould of this light guide plate.
Another object of the present invention provides a kind of method that is easy to make large scale liquid crystal display light guide plate.
Another purpose of the present invention provides a kind of suitable amount production fluid crystal display manufacturing method of light conducting board.
A further object of the present invention is to propose the method that a kind of production has big variation in thickness light guide plate.
The method that utilization of the present invention is cast into the light guide plate of polymerization (casting) manufacturing LCD comprises the double-wedge mould of preparing to be cast into the polymerization processing procedure, blending (mix up) methyl methacrylate (MMA) begins agent (initiator) azoisobutyronitrile (Azo Bis Isobuthyro Nitrile) with polymerization and prepares polymerization (prepolymerization), and blending pulping (slurry), concoction after the above-mentioned pulp is cast in the above-mentioned mould, utilize 90-125 ℃ thermal treatment (heat treatment) to make the concoction in the mould carry out polymerization, the demoulding more at last just can obtain the transparent acrylic resin light guide plate of double-wedge.
Wherein.Preparation polymerization that described methyl methacrylate and azoisobutyronitrile (Azo Bis IsobuthyroNitrile) carry out and blending pulping process are included under the 60-90 ℃ of temperature and stirred 30 minutes.
The described double-wedge mould that is cast into the polymerization processing procedure comprises: the counterdie of a dull and stereotyped patrix and a double-wedge.
The surface of the counterdie of described mould is a non-smooth surface.
Described non-smooth surface is a convex-concave surface.
Described non-smooth surface is a serrated surface.
The maximum ga(u)ge of described double-wedge and minimum thickness differ more than 3 millimeters.
The light guide plate that adopts utilization of the present invention to be cast into the LCD of polymerization manufacturing comprises: the transparent acrylic resin matrix of double-wedge; The first surface on plane is positioned on the one side of above-mentioned matrix, and the second surface of double-wedge is positioned on the above-mentioned matrix another side relative with above-mentioned first surface.
Another aspect of the present invention is that the double-wedge lower plate at mould forms non-smooth surface, thereby obtains to have the light guide plate of preferable light scattering effect.In different embodiment, the double-wedge surface of light guide plate can form male and fomale(M﹠F) or serrated face, makes light guide plate can produce uniform surface brightness in the future.The mould preferred embodiments of making light guide plate is to use glass, for example, melten glass is produced through pressing mold.
The present invention adopts and is cast into the light guide plate that polymerization is made LCD, can obtain to have the light guide plate of big variation in thickness, significantly alleviates the weight of light guide plate, therefore is suitable for being used for producing in batches the light guide plate of large-sized LCD.
Describe content of the present invention and characteristics in detail below in conjunction with drawings and Examples.
Fig. 1 and Fig. 2 are respectively the back lighting device of the LCD of traditional direct-injection type and side-light type.
Fig. 3 is the back lighting device of traditional side-light type LCD of bilateral formula and three limit formula light sources.
Fig. 4 to Fig. 6 has shown three kinds of light guide plate with preferable light scattering effect.
Fig. 7 is a double-wedge light guide plate of the present invention.
Fig. 8 is a template of making light guide plate shown in Figure 7.
Fig. 9 is another template of the present invention, is used for making the double-wedge light guide plate with light scattering effect.
Figure 10 is a double-wedge light guide plate of utilizing template shown in Figure 9 to produce.
Figure 11 has shown that the present invention makes the process of light guide plate.
In the accompanying drawings, each label is respectively: 10 light sources; 12 reflecting plates; 14 diffuser plates; 20 light sources; 22 light guide plate; 24 light reflector; 26 diffuser plates; 28 light guide plate; 30 light sources; 32 light guide plate; 34 light sources; 36 light guide plate; 38 transparent resin ink laies; 40 coarse; 42 indentures; 44 light guide plate; 46 light sources; 48 light reflector; 50 patrixes; 52 counterdies; 54 coarse; 56 coarse; 60 are cast into the processing procedure that light guide plate is made in polymerization; 62 prepare mould; 64 blendings; 66 methyl methacrylates; 68 polymerizations begin agent; 70 preparation polymerizations; 72 thermal treatments; 74 pulps; 76 injection moldings; 78 polymerizations; 80 thermal treatments; 82 demouldings; 84 light guide plate.
According to the present invention, mainly be to utilize to be cast into the light guide plate that polymerization is made LCD, its step comprises the double-wedge mould of preparing to be cast into the polymerization processing procedure: blending methyl methacrylate and polymerization begin agent azoisobutyronitrile (Azo Bis Isobuthyro Nitrile); Make above-mentioned concoction 60-90 ℃ of preparation polymerization down; Concoction after the above-mentioned preparation polymerization is carried out 30 minutes pulp; Concoction after the above-mentioned pulp is cast in the above-mentioned mould; Utilize 100 ℃ thermal treatment to make the concoction in the mould carry out polymerization; The demoulding more at last just can obtain the transparent acrylic resin light guide plate of double-wedge.
Fig. 7 shows the preferred embodiment of a light guide plate, and Fig. 7 (a) is that the cut-open view light guide plate 44 of Fig. 7 (b) is double-wedge, and promptly a surface is the plane, and another surface is the double-wedge surface of indent.Light guide plate 44 dual-sides are respectively equipped with light source 46, and with light reflector 48 ambient light sources 46.The light guide plate 44 of double-wedge can weight reduction.With 14 inches acryl light guide plate is example, and its edge can reach more than 3 millimeters (mm) with the thickness difference of central authorities, and weight alleviates about more than 20% than flat light guide plate.
Fig. 8 is a mould of making light guide plate shown in Figure 7, and it comprises a patrix 50 and a counterdie 52.Patrix 50 is a sheet glass, and 52 of counterdies are double-wedge glass.This mould can utilize the glass of fusion to produce in the pressing mold mode.
For promoting the even effect of light guide plate surface brightness, can make the double-wedge surface of light guide plate form non-smooth surface, Fig. 9 proposes a kind of counterdie 52 with coarse 54, utilizes it can make light guide plate shown in Figure 10 44.On the light guide plate 44 coarse 56 has big zone in centre, extends to the both sides then to diminish gradually.The technician who knows LCD light guide plate skill should understand, non-smooth double-wedge surface can have various shape or structure to change, the serrated face that for example aforementioned background of invention is mentioned, or printing is different from the acrylic plate refractive index materials in the double-wedge surface.
The process of shop drawings 7 or light guide plate shown in Figure 10 is shown in Figure 11 as.Be cast into polymerization in use and make in the processing procedure 60 of light guide plate, at first must suitably prepare mould 62, for example use Fig. 8 or mould shown in Figure 9.Then be the blending 64 of polymeric material, use the methyl methacrylate 66 and the polymerization of being ready in advance to begin agent azoisobutyronitrile (Azo Bis Isobuthyro Nitrile) 68.Earlier concoction is prepared polymerase 17 0, that is, allow single amount body (monomer) of blending at 60-90 ℃ preliminary polymerization take place earlier, this step can apply thermal treatment.
The concoction that will prepare again after the polymerization carries out 30 minutes pulp 74, injects the previous mould of preparing 76.Make the complete polymerase 17 8 of concoction in the mould, this step must be bestowed 90-125 ℃ thermal treatment 80 to promote the speed and the effect of polymerization.Close 78 steps through getting, methyl methacrylate can complete polymerization and according to mould molding.Again through the demoulding 82, just obtain the transparent acrylic resin light guide plate 84 of double-wedge at last.
Because utilize to be cast into polymerization, even large-sized light guide plate also is easy to reach, and its thickness difference can be quite big, alleviating the weight of whole light guide plate, and this processing procedure is fit to volume production, has very big value for industry.
The above embodiments have illustrated characteristics of the present invention, and its purpose is enabling those skilled in the art to understand content of the present invention and enforcement according to this, and non-limiting scope of the present invention.For a person skilled in the art, can easily revise the foregoing description, and not break away from the spirit that the present invention discloses.
Claims (10)
1, a kind of manufacturing method of light conducting board of LCD is characterized in that comprising the following steps:
Preparation is cast into the double-wedge mould of polymerization processing procedure;
Blending methyl methacrylate and polymerization begin agent;
Make above-mentioned concoction preparation polymerization;
With the concoction pulp after the above-mentioned preparation polymerization;
Concoction after the above-mentioned pulp is cast in the above-mentioned mould;
Utilize thermal treatment to make the concoction in the mould carry out polymerization, the demoulding then.
2, manufacture method as claimed in claim 1 is characterized in that the described double-wedge mould that is cast into the polymerization processing procedure comprises: the counterdie of a dull and stereotyped patrix and a double-wedge.
3, manufacture method as claimed in claim 2, the surface that it is characterized in that the counterdie of described mould is a non-smooth surface.
4, manufacture method as claimed in claim 3 is characterized in that described non-smooth surface is a convex-concave surface.
5, manufacture method as claimed in claim 3 is characterized in that described non-smooth surface is a serrated surface.
6, manufacture method as claimed in claim 2 is characterized in that the maximum ga(u)ge of described double-wedge and minimum thickness differ more than 3 millimeters.
7, a kind of utilization is cast into the light guide plate of the LCD of polymerization manufacturing, it is characterized in that adopting the product that makes as described any one method of claim 1-6, comprising:
The transparent acrylic resin matrix of double-wedge;
The first surface on plane is positioned on the one side of above-mentioned matrix, and the second surface of double-wedge is positioned on the above-mentioned matrix another side relative with above-mentioned first surface.
8, light guide plate as claimed in claim 7 is characterized in that described second surface is a non-smooth surface.
9, light guide plate as claimed in claim 8 is characterized in that described non-smooth surface is a convex-concave surface.
10, light guide plate as claimed in claim 8 is characterized in that described non-smooth surface is a serrated surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01129556 CN1329264A (en) | 2001-06-27 | 2001-06-27 | Method for producing liquid crystal display light conductor plate by using cast polymerization process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01129556 CN1329264A (en) | 2001-06-27 | 2001-06-27 | Method for producing liquid crystal display light conductor plate by using cast polymerization process |
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| CN1329264A true CN1329264A (en) | 2002-01-02 |
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| CN 01129556 Pending CN1329264A (en) | 2001-06-27 | 2001-06-27 | Method for producing liquid crystal display light conductor plate by using cast polymerization process |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100395614C (en) * | 2004-08-16 | 2008-06-18 | 鸿富锦精密工业（深圳）有限公司 | Method for manufacturing light guiding plate |
| CN102108173A (en) * | 2011-02-22 | 2011-06-29 | 常州丰盛光电科技股份有限公司 | Manufacturing method of high-brightness light guide plate |
| CN102230977A (en) * | 2011-05-11 | 2011-11-02 | 泰兴汤臣压克力有限公司 | LCD light guide panel and moulding technology thereof |
| CN103148362A (en) * | 2011-12-06 | 2013-06-12 | 郭锦标 | Plane light source device and manufacturing method thereof |
| CN103407050A (en) * | 2013-08-07 | 2013-11-27 | 东莞市鑫聚光电科技有限公司 | Production method of light guiding plate |
| CN105066014A (en) * | 2015-09-22 | 2015-11-18 | 合肥京东方显示光源有限公司 | Method for manufacturing lamp bar and light guide board integrated structure, as well as mold and backlight module |
-
2001
- 2001-06-27 CN CN 01129556 patent/CN1329264A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100395614C (en) * | 2004-08-16 | 2008-06-18 | 鸿富锦精密工业（深圳）有限公司 | Method for manufacturing light guiding plate |
| CN102108173A (en) * | 2011-02-22 | 2011-06-29 | 常州丰盛光电科技股份有限公司 | Manufacturing method of high-brightness light guide plate |
| CN102108173B (en) * | 2011-02-22 | 2012-05-09 | 常州丰盛光电科技股份有限公司 | Manufacturing method of high-brightness light guide plate |
| CN102230977A (en) * | 2011-05-11 | 2011-11-02 | 泰兴汤臣压克力有限公司 | LCD light guide panel and moulding technology thereof |
| CN103148362A (en) * | 2011-12-06 | 2013-06-12 | 郭锦标 | Plane light source device and manufacturing method thereof |
| CN103407050A (en) * | 2013-08-07 | 2013-11-27 | 东莞市鑫聚光电科技有限公司 | Production method of light guiding plate |
| CN103407050B (en) * | 2013-08-07 | 2016-01-13 | 东莞市鑫聚光电科技有限公司 | A kind of production method of light guide plate |
| CN105066014A (en) * | 2015-09-22 | 2015-11-18 | 合肥京东方显示光源有限公司 | Method for manufacturing lamp bar and light guide board integrated structure, as well as mold and backlight module |
| CN105066014B (en) * | 2015-09-22 | 2018-07-13 | 合肥京东方显示光源有限公司 | Lamp bar and light guide plate integral structure production method and its mold, backlight module |
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