CN1624496A - Manufacturing method of optical diffusion plate and optical diffusion plate made by said method - Google Patents
Manufacturing method of optical diffusion plate and optical diffusion plate made by said method Download PDFInfo
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- CN1624496A CN1624496A CN 200310117058 CN200310117058A CN1624496A CN 1624496 A CN1624496 A CN 1624496A CN 200310117058 CN200310117058 CN 200310117058 CN 200310117058 A CN200310117058 A CN 200310117058A CN 1624496 A CN1624496 A CN 1624496A
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- light diffusing
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Abstract
The invention discloses a manufacturing method for light dispersion plate and the plate made by the method, which mainly is adding light dispersion agent and additive agent and into polycarbonate resin and polymethyl methacrylate resin seperately to create PC unit plate with designed width and PMMA unit plate, then by way of heat application and coextrusion to combining the unit plates to be light dispersion plate with high light transmittance and diffusivity (average lightening), heat resistant, no form changing, light weight small width.
Description
Technical field
The present invention relates to the light diffusing sheet that a kind of light diffusing sheet manufacture method and Using such method are made, mainly be in PC (polycarbonate resin) and PMMA (plexiglass), to add light diffusing agent and adjuvant respectively, make the PC unit plate body and the PMMA unit plate body that are shaped to preset thickness separately, close by heat posted again or the co-extrusion pressure mode two kinds of unit plate bodys are combined into have high transmission rate, high light diffusivity (evenly luminous), heat-resisting, indeformable, light weight and thin light diffusing sheet.
Background technology
The industry utilization is assembled in LCD (LCD) device backlight module therebetween; usually can assess and select the preferable template backlight of performance, the criterion of this template backlight then includes quality of display pictures, brightness height, luminous even, correlation properties such as light angle is big, scalable, power consumption is low, light and approach.Wherein, the backlight module significant components then includes: (1) bulb or other light source: as light source is provided, it mainly contains three kinds, i.e. cold-cathode tube (CCFL), light emitting diode (LED), electroluminescent device (ELD), and other is then with halogen tungsten lamp, metal halide lamp and so on.(2) light guide plate or photoconductive tube: light is directed to display surface from light source, and line source is atomized into uniform surface light source.(3) blooming: be used for controlling and revising uniformity coefficient, color, contrast, and visual angle and so on of light, blooming includes reflecting plate, light diffusing sheet, prismatic lens herein.The backlight module of being made up of above-mentioned member is installed in its default position of LCD (LCD), has good picture to show to possess.
Wherein, light diffusing sheet roughly is directly to be coated with light diffusing agent, adjuvant and binder on the resin film surface of various materials on industry is made at present, the enforcement of this form then easily because of enduring property deficiency surface irregularity, and then influences the uniformity coefficient of light to the large-size panel.In addition, PC (polycarbonate resin) is added with light diffusing agent and adjuvant, the sheet material thermotolerance of institute's moulding is good, if increase its light diffusing (mist degree), then transmittance is relatively poor, otherwise if require its light transmission then light diffusing (mist degree) then can't improve.In addition PMMA (plexiglass) is added with light diffusing agent and adjuvant, the sheet material of institute's moulding is more thermo-labile, and easy deformation easily produces surface irregularity and then influences the uniformity coefficient of light.
Backlight module light diffusing sheet therebetween is provided with at method for making and member then has quite a lot of embodiment, increasing brightness of backlight module, and can comply with required for product assembly group dealer by this and the use approach be done suitable selection.
The innovation and creation content
The purpose of this invention is to provide a kind of manufacture method that is combined in the may command on the backlight module and revises the light diffusing sheet of light uniformity coefficient, possess with the light diffusing sheet of this method processing better high transmission rate is arranged, high light diffusivity (luminous even), heat-resisting, indeformable, light weight and thin characteristic.
Another object of the present invention provides the light diffusing sheet that possessing of Using such method manufacturing has better high transmission rate, high light diffusivity (luminous evenly), heat-resisting, indeformable, light weight and thin characteristic.
The invention provides a kind of light diffusing sheet manufacture method, it is characterized in that, comprise light diffusing agent and adjuvant are mixed the unit plate body, and with the be combined as a whole step of light diffusing sheet of the unit plate body that multilayer has been mixed light diffusing agent and adjuvant, wherein, described unit plate body is one or both in polycarbonate resin-PC unit plate body or the plexiglass-PMMA unit plate body.
A kind of embodiment of above-mentioned light diffusing sheet manufacture method, it comprises following step:
A. in PC and PMMA, add light diffusing agent and adjuvant respectively, respectively through the extrusion under molten condition of two extruders with PC and PMMA;
B. PC and the PMMA with extrusion imports shunt under molten condition, and introduces mould inside after the typing roller is shaped into PC unit plate body and PMMA unit plate body;
C.PC unit plate body and PMMA unit plate body are to adopt with the definite combination of co-extrusion pressure mode, form light diffusing sheet.
The another kind of embodiment of above-mentioned light diffusing sheet manufacture method, it comprises following step:
A. in PMMA, add light diffusing agent and adjuvant, mold upper and lower two-layer PMMA unit plate body respectively, be wound into tubular after the cooling respectively;
B. in PC, add light diffusing agent and adjuvant, PC is introduced mould inside after the typing of typing roller under molten condition with extruder;
C. should form the PC unit plate body of desired thickness by the PC material that the typing roller is drawn;
D. the PMMA unit plate body that extends winding by upper and lower orientation is after the preheating of heating roller, the PC unit plate body that maintains preset temperature is placed in one and each other closing become three-layer type unit plate body;
E. with upper and lower heating and pressurizing roller set three-layer type unit plate body is applied preset pressure, temperature, the three-layer unit plate body is carried out heat posted close the formation light diffusing sheet.
Above-mentioned light diffusing sheet manufacture method is an embodiment also, and it comprises following step:
A. in PC, add light diffusing agent and adjuvant, mold upper and lower two-layer PC unit plate body respectively, coiled tubular separately after the cooling;
B. in PMMA, add light diffusing agent and adjuvant, PMMA is introduced mould inside after the typing of typing roller under molten condition with extruder;
C. this typing roller PMMA material of drawing forms the PMMA unit plate body of desired thickness;
D. the PC unit plate body of winding is extended after the preheating of heating roller in upper and lower orientation, and the PMMA unit plate body that the maintains preset temperature closing each other that is placed in one is become three-layer type unit plate body;
E. with upper and lower heating and pressurizing roller set three-layer type unit plate body is applied preset pressure, temperature, the three-layer unit plate body is carried out heat posted close the formation light diffusing sheet.
In the above-mentioned light diffusing sheet manufacture method, can adopt heat posted to close mode in conjunction with PC unit plate body and PMMA unit plate body, and also can adopt the co-extrusion pressure mode in conjunction with the three-layer unit plate body.
The present invention provides the light diffusing sheet of making according to said method simultaneously, be multilevel-cell plate body be combined into, described unit plate body is the PC unit plate body of filling preset ratio adjuvant in the PC-polycarbonate resin, or one or both in the PMMA unit plate body of filling preset ratio adjuvant in the PMMA-plexiglass.
Above-mentioned light diffusing sheet be one deck PC unit plate body and one deck PMMA unit plate body each other strong bonded form.
Above-mentioned light diffusing sheet, middle layer are PC unit plate body, and being combined in PC unit plate body levels is PMMA unit plate body, and this three-layer unit plate body strong bonded each other becomes light diffusing sheet.
Above-mentioned light diffusing sheet, middle layer are PMMA unit plate body, are combined in the upper and lower layer of PMMA unit plate body and are PC unit plate body, and this three-layer unit plate body strong bonded to each other becomes light diffusing sheet.
The PMMA cell board body and function PC unit plate body that above-mentioned light diffusing sheet, its each layer are used substitutes.
The light diffusing sheet that provides of the present invention is that PC and PMMA are used in combination, utilize PC to have the preferable rerum natura heat-resisting, indeformable, that refractive index is high, utilize PMMA to have preferable optics rerum natura simultaneously, as the penetrance characteristic, reach and overcome the problem that exists with the category light diffusing sheet at present, and promote its default functional characteristic, obtain having high transmission rate, high light diffusivity (luminous evenly), heat-resisting, indeformable, light weight and thin light diffusing sheet.Method step of the present invention is clear, and is workable, is beneficial to industrial application.
Description of drawings
Fig. 1: the process block diagram of light diffusing sheet manufacture method first embodiment of the present invention;
Fig. 2: the step synoptic diagram of light diffusing sheet manufacture method first embodiment of the present invention;
Fig. 3: the process block diagram of light diffusing sheet manufacture method second embodiment of the present invention;
Fig. 4: the step synoptic diagram of light diffusing sheet manufacture method second embodiment of the present invention;
Fig. 5: the process block diagram of light diffusing sheet manufacture method the 3rd embodiment of the present invention;
Fig. 6: the step synoptic diagram of light diffusing sheet manufacture method the 3rd embodiment of the present invention;
Fig. 7: the present invention implements another kenel light diffusing sheet that work changes according to first.
Fig. 8: the present invention implements another kenel light diffusing sheet that work changes according to second.
Among the figure: 1,1 ', 6,8,8 ' expression PC unit plate body;
2,4,5,9 expression PMMA unit plate bodys;
3,3 ', 3 ", 7,7 ' expression light diffusing sheet;
10,20,50 expression extruders; 30 expression shunts; 40,60 expression moulds;
70 expression heating and pressurizing roller set; 71 expression heating rollers; 72 expression typing rollers.
Embodiment
The manufacture method of light diffusing sheet of the present invention, referring to Fig. 1, Fig. 2, its first embodiment includes following steps:
A. do the extrusion of different rerum natura molten condition material by two extruders 10,20 respectively after in PC (polycarbonate resin) and PMMA (plexiglass), adding light diffusing agent and adjuvant respectively.
B. PC, PMMA that should the difference rerum natura import shunt 30 under molten condition, and it is inner after 72 typings of typing roller to introduce mould 40.
C. according to this, to PC with different rerum naturas and PMMA unit plate body 1,2 by this co-extrusion pressure mode, reach definitely be combined into have high transmission rate, high light diffusivity (luminous evenly), heat-resisting, indeformable, light weight and thin light diffusing sheet 3.
Second embodiment of light diffusing sheet manufacture method of the present invention referring to Fig. 3, Fig. 4, includes following steps:
A. add light diffusing agent and adjuvant earlier in PMMA (plexiglass), the upper and lower layer of extrusion molding PMMA unit plate body 4,5 is wound into tubular after the cooling respectively.
B. in PC (polycarbonate resin), add light diffusing agent and adjuvant, PC is introduced in the mould 60 under molten condition, after 72 typings of typing roller through extruder 50.
C. should form the PC unit plate body 6 of desired thickness via the PC material that typing roller 72 is drawn.
D. extend the PMMA unit plate body 4,5 of winding with the upper and lower orientation of heating roller 71 preheatings, the PC unit plate body 6 that will maintain preset temperature again places therebetween closing each other to become three-layer type unit plate body.
E. last, apply with preset pressure, temperature by upper and lower heating and pressurizing roller set 70, the three-layer unit plate body is carried out heat posted close, finish in conjunction with having high transmission rate, high light diffusivity (luminous evenly), heat-resisting, indeformable, light weight and thin light diffusing sheet 7.
The 3rd embodiment of light diffusing sheet manufacture method of the present invention referring to Fig. 5, Fig. 6, includes following steps:
A. add light diffusing agent and adjuvant earlier in PC (polycarbonate resin), mold upper and lower layer PC unit plate body 8,8 ' respectively, the cooling back is around being rolled into tubular.
B. add light diffusing agent and adjuvant in PMMA (plexiglass), it is inner after 72 typings of typing roller through extruder 50 PMMA to be introduced mould 60 under molten condition.
C. should present the PMMA unit plate body 9 of desired thickness via the PMMA material that typing roller 72 is drawn.
D. the PC unit plate body 8,8 ' of winding is extended after 71 preheatings of heating roller in upper and lower orientation, and the PMMA unit plate body 9 that will maintain preset temperature again places therebetween closing each other to become three-layer type unit plate body.
E. last, apply with preset pressure, temperature by upper and lower heating and pressurizing roller set 70, the three-layer unit plate body is carried out heat posted close, finish in conjunction with having high transmission rate, high light diffusivity (luminous evenly), heat-resisting, indeformable, light weight and thin light diffusing sheet 7 '.
The above-mentioned light diffusing agent that is added among first second, third embodiment PC (polycarbonate resin), the PMMA (plexiglass) has: (I) organic dust (Organic Powder); (II) inorganic powder (inorganicPowder).
Organic dust is the penetration light diffusing agent, changes the working direction of light in the time of making the light penetration spheroid by refractive index; Inorganic powder is the irregularly shaped of applying powder surface, light is reflected reach the default effect of light diffusion, learns that the penetrance of organic dust is more preferable than inorganic powder in the essence test.Light diffusion rerum natura then forms variant characteristic mutually because of refractive index, light diffusing agent size.
Light diffusing sheet of the present invention is that PC and PMMA are used in combination, utilize PC to have the preferable rerum natura heat-resisting, indeformable, that refractive index is high, utilize PMMA to have preferable optics rerum natura, as the penetrance characteristic, reach and overcome the problem that exists with the category light diffusing sheet at present, and promote its default functional characteristic, to reach the required rerum natura of light diffusing sheet.Simultaneously, can add light diffusing agent at the PC of first, second embodiment (polycarbonate resin) with organic dust, as multipolymer (Copolymer), polyester styrene (PS-POLY STYRENE), keep its light transmittance, in PMMA (plexiglass), can add in addition with inorganic powder, as SiO
2, TiO
2Make light diffusing agent (or organic dust), remedy the deficiency of PC unit plate body to light diffusivity (or mist degree), PC unit plate body is then remedied the heat-resisting deficiency of PMMA unit plate body, make light diffusing sheet unlikely generation deformation when chance is hot, and can come in response to various required transmittances of dissimilar display specifications and light diffusivity by the ratio allotment of organic dust or inorganic powder light diffusing agent.
PMMA (plexiglass) to the present invention first, second, third embodiment mixes with adjuvant, expand agent as organic or inorganic light, make PMMA cell board body surface aspect present uneven surface slightly, so that the light diffusing sheet finished product has preferable mist degree, and can reach the Expected Results of controlling picture element (Pixel).
Become contents such as component selections, adding proportion for what add organic dust or inorganic powder light diffusing agent and adjuvant in PC and PMMA unit plate body, can adopt existing or the technology of development further, this non-problem to be solved by this invention is not so give unnecessary details.
The light diffusing sheet first embodiment manufacture method of the present invention's design also can be adopted in the heat posted mode of closing and be finished, and also can adopt in the co-extrusion pressure mode second, third embodiment manufacture method of light diffusing sheet in addition and finish.
The light diffusing sheet 3 that light diffusing sheet first embodiment of the present invention's design machines, wherein this outer field PMMA (plexiglass) unit plate body 2 can be adopted with PC (polycarbonate resin) unit 1 ' and substitute (as Fig. 7, Fig. 8), promptly be combined to form light diffusing sheet 3 ' by two-layer PC unit plate body, being two-layer PC unit the additive ratio or the material that are mixed can be different, can reach the characteristics that material has the resource recycling like this.
The light diffusing sheet 7 that light diffusing sheet second embodiment of the present invention's design machines, wherein PMMA (plexiglass) unit 4,5 of this upper and lower layer can be adopted with PC (polycarbonate resin) unit 1 ' and substitute (as Fig. 8), promptly be combined to form light diffusing sheet 3 by three layers of PC unit plate body ", additive ratio or material that this moment, each layer PC unit plate body was mixed can be different.
Claims (11)
1, a kind of light diffusing sheet manufacture method, it is characterized in that, comprise light diffusing agent and adjuvant are mixed the unit plate body, and with the be combined as a whole step of light diffusing sheet of the unit plate body that multilayer has been mixed light diffusing agent and adjuvant, wherein, described unit plate body is one or both in polycarbonate resin-PC unit plate body or the plexiglass-PMMA unit plate body.
2, light diffusing sheet manufacture method according to claim 1 is characterized in that, comprises following step:
A. in PC and PMMA, add light diffusing agent and adjuvant respectively, respectively through the extrusion under molten condition of two extruders with PC and PMMA;
B. PC and the PMMA with extrusion imports shunt under molten condition, and introduces mould inside after the typing roller is shaped into PC unit plate body and PMMA unit plate body;
C.PC unit plate body and PMMA unit plate body are to adopt with the definite combination of co-extrusion pressure mode, form light diffusing sheet.
3, light diffusing sheet manufacture method according to claim 1 is characterized in that, comprises following step:
A. in PMMA, add light diffusing agent and adjuvant, mold upper and lower two-layer PMMA unit plate body respectively, be wound into tubular after the cooling separately;
B. in PC, add light diffusing agent and adjuvant, PC is introduced mould inside after the typing of typing roller under molten condition with extruder;
C. should form the PC unit plate body of desired thickness by the PC material that the typing roller is drawn;
D. the PMMA unit plate body of upper and lower two-layer coiling is separately after heating roller preheating, and the PC unit plate body that the maintains preset temperature closing each other that is placed in one is become three-layer type unit plate body;
E. with upper and lower heating and pressurizing roller set three-layer type unit plate body is applied preset pressure, temperature, the three-layer unit plate body is carried out heat posted close the formation light diffusing sheet.
4, light diffusing sheet manufacture method according to claim 1 is characterized in that, it comprises following step:
A. in PC, add light diffusing agent and adjuvant, mold upper and lower two-layer PC unit plate body respectively, coiled tubular separately after the cooling;
B. in PMMA, add light diffusing agent and adjuvant, PMMA is introduced mould inside after the typing of typing roller under molten condition with extruder;
C. this typing roller PMMA material of drawing forms the PMMA unit plate body of desired thickness;
D. the PC unit plate body of upper and lower two-layer coiling is separately after heating roller preheating, and the PMMA unit plate body that the maintains preset temperature closing each other that is placed in one is become three-layer type unit plate body;
E. with upper and lower heating and pressurizing roller set three-layer type unit plate body is applied preset pressure, temperature, the three-layer unit plate body is carried out heat posted close the formation light diffusing sheet.
5, light diffusing sheet manufacture method according to claim 2 is characterized in that, adopts heat posted to close mode in conjunction with PC unit plate body and PMMA unit plate body.
6, according to claim 3 or 4 described light diffusing sheet manufacture methods, it is characterized in that, adopt the co-extrusion pressure mode in conjunction with the three-layer unit plate body.
7, a kind of light diffusing sheet, be multilevel-cell plate body be combined into, described unit plate body is the PC unit plate body of filling preset ratio adjuvant in the PC-polycarbonate resin, or one or both in the PMMA unit plate body of filling preset ratio adjuvant in the PMMA-plexiglass.
8, light diffusing sheet as claimed in claim 7 is characterized in that, is one deck PC unit plate body and one deck PMMA unit plate body light diffusing sheet that forms of strong bonded each other.
9, light diffusing sheet as claimed in claim 7 is characterized in that, the middle layer is a PC unit plate body, is combined in the upper and lower layer of PC unit plate body and is PMMA unit plate body, and this three-layer unit plate body strong bonded each other becomes light diffusing sheet.
10, light diffusing sheet as claimed in claim 7 is characterized in that, the middle layer is a PMMA unit plate body, is combined in the upper and lower layer of PMMA unit plate body and is PC unit plate body, and this three-layer unit plate body strong bonded to each other becomes light diffusing sheet.
As the arbitrary described light diffusing sheet of claim 7 to 10, it is characterized in that 11, the PMMA cell board body and function PC unit plate body that its each layer is used substitutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310117058 CN1624496A (en) | 2003-12-05 | 2003-12-05 | Manufacturing method of optical diffusion plate and optical diffusion plate made by said method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310117058 CN1624496A (en) | 2003-12-05 | 2003-12-05 | Manufacturing method of optical diffusion plate and optical diffusion plate made by said method |
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| CN1624496A true CN1624496A (en) | 2005-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200310117058 Pending CN1624496A (en) | 2003-12-05 | 2003-12-05 | Manufacturing method of optical diffusion plate and optical diffusion plate made by said method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100390571C (en) * | 2004-06-28 | 2008-05-28 | 颖台科技股份有限公司 | Light spreading plate with high surface hardness and its producing method |
| CN102043186A (en) * | 2010-10-21 | 2011-05-04 | 上海向隆电子科技有限公司 | Light guide plate and manufacturing method thereof |
| CN102073092A (en) * | 2011-03-03 | 2011-05-25 | 上海向隆电子科技有限公司 | Light guide plate, illuminating device and method for manufacturing light guide plate |
| CN102444862A (en) * | 2010-10-15 | 2012-05-09 | 苏州拓显光电材料有限公司 | Diffusion plate and backlight module using same |
| CN105579770A (en) * | 2013-07-22 | 2016-05-11 | 赢创罗姆有限公司 | Light guide plate and method for the production thereof |
| CN106950750A (en) * | 2017-03-20 | 2017-07-14 | 青岛骐骥光电科技有限公司 | A kind of quantum dot spreads plate producing process |
| CN108333664A (en) * | 2018-01-18 | 2018-07-27 | 苏州三鑫时代新材料股份有限公司 | A kind of preparation method and its equipment of the light guide plate containing optics site and reflecting layer |
| CN113291024A (en) * | 2021-05-19 | 2021-08-24 | 杭州赛宁板材有限公司 | Multilayer co-extrusion composite light diffusion plate and preparation method thereof |
-
2003
- 2003-12-05 CN CN 200310117058 patent/CN1624496A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100390571C (en) * | 2004-06-28 | 2008-05-28 | 颖台科技股份有限公司 | Light spreading plate with high surface hardness and its producing method |
| CN102444862A (en) * | 2010-10-15 | 2012-05-09 | 苏州拓显光电材料有限公司 | Diffusion plate and backlight module using same |
| CN102043186A (en) * | 2010-10-21 | 2011-05-04 | 上海向隆电子科技有限公司 | Light guide plate and manufacturing method thereof |
| CN102073092A (en) * | 2011-03-03 | 2011-05-25 | 上海向隆电子科技有限公司 | Light guide plate, illuminating device and method for manufacturing light guide plate |
| CN105579770A (en) * | 2013-07-22 | 2016-05-11 | 赢创罗姆有限公司 | Light guide plate and method for the production thereof |
| CN105579770B (en) * | 2013-07-22 | 2019-04-12 | 赢创罗姆有限公司 | Light guide plate and its manufacturing method |
| CN106950750A (en) * | 2017-03-20 | 2017-07-14 | 青岛骐骥光电科技有限公司 | A kind of quantum dot spreads plate producing process |
| CN108333664A (en) * | 2018-01-18 | 2018-07-27 | 苏州三鑫时代新材料股份有限公司 | A kind of preparation method and its equipment of the light guide plate containing optics site and reflecting layer |
| CN113291024A (en) * | 2021-05-19 | 2021-08-24 | 杭州赛宁板材有限公司 | Multilayer co-extrusion composite light diffusion plate and preparation method thereof |
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