CN101806428B - Light guide plate - Google Patents
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- CN101806428B CN101806428B CN2009100072600A CN200910007260A CN101806428B CN 101806428 B CN101806428 B CN 101806428B CN 2009100072600 A CN2009100072600 A CN 2009100072600A CN 200910007260 A CN200910007260 A CN 200910007260A CN 101806428 B CN101806428 B CN 101806428B
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- 239000002245 particle Substances 0.000 claims abstract description 42
- 229910004298 SiO 2 Inorganic materials 0.000 claims abstract description 8
- 239000000758 substrate Substances 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 6
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims abstract description 4
- 229910010413 TiO 2 Inorganic materials 0.000 claims abstract description 4
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 4
- 229910006404 SnO 2 Inorganic materials 0.000 claims description 3
- 239000004416 thermosoftening plastic Substances 0.000 claims description 3
- GEIAQOFPUVMAGM-UHFFFAOYSA-N ZrO Inorganic materials [Zr]=O GEIAQOFPUVMAGM-UHFFFAOYSA-N 0.000 claims 1
- -1 Al 2 O 3 Chemical class 0.000 abstract description 6
- 238000002834 transmittance Methods 0.000 abstract description 5
- 238000009792 diffusion process Methods 0.000 abstract description 3
- 229910044991 metal oxide Inorganic materials 0.000 abstract description 2
- 150000004706 metal oxides Chemical class 0.000 abstract description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 8
- 239000004926 polymethyl methacrylate Substances 0.000 description 7
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 3
- 229910015902 Bi 2 O 3 Inorganic materials 0.000 description 2
- 229910020599 Co 3 O 4 Inorganic materials 0.000 description 2
- 229910005191 Ga 2 O 3 Inorganic materials 0.000 description 2
- 229910021193 La 2 O 3 Inorganic materials 0.000 description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 2
- 229910017493 Nd 2 O 3 Inorganic materials 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229920002845 Poly(methacrylic acid) Polymers 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002296 dynamic light scattering Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 150000004702 methyl esters Chemical class 0.000 description 1
- 229920001490 poly(butyl methacrylate) polymer Polymers 0.000 description 1
- 229920001483 poly(ethyl methacrylate) polymer Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
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- Optical Elements Other Than Lenses (AREA)
Abstract
本发明涉及一种导光板，其特征在于包括：一基材，由热塑性塑料所制成；多数个反射微粒，散布于所述基材中，平均粒径为0.1μm～100μm，各所述反射微粒分别具有一核心与一壳层，壳层可由Al2O3、ZnO或ZrO2等金属氧化物所制成，核心则可由SiO2或TiO2或与壳层相同材质所制成。由此，该导光板不仅透光率高，同时可将光源所发出的光线均匀扩散，可取代传统导光板与扩散板的组合。
The present invention relates to a light guide plate, characterized by comprising: a substrate made of thermoplastic plastic; a plurality of reflective particles dispersed in the substrate, with an average particle size of 0.1 μm to 100 μm, each of the reflective particles having a core and a shell, the shell being made of metal oxides such as Al 2 O 3 , ZnO or ZrO 2 , and the core being made of SiO 2 or TiO 2 or the same material as the shell. Thus, the light guide plate not only has high light transmittance, but also can evenly diffuse the light emitted by the light source, and can replace the combination of the traditional light guide plate and the diffusion plate.
Description
技术领域 technical field
本发明与导光板有关，特别是指一种透光率高并可将光源所发出的光线均匀扩散的导光板。The invention relates to a light guide plate, in particular to a light guide plate with high light transmittance and capable of uniformly diffusing light emitted by a light source.
背景技术 Background technique
一般液晶显示器所使用的背光模块主要包含有光源、导光板、反射板、扩散板、增亮膜与偏光转换膜，其中，导光板的主要功能在于导引光线方向，以提高面板光辉度及控制亮度均匀，反射板用来防止导光板底部光线外漏，以增加光的使用效率，扩散板的功能在于使导光板射出的光线扩散成一均匀的面光源。The backlight module used in general liquid crystal display mainly includes light source, light guide plate, reflector, diffuser plate, brightness enhancement film and polarized light conversion film. The brightness is uniform. The reflector is used to prevent light from leaking from the bottom of the light guide plate to increase the efficiency of light use. The function of the diffuser is to diffuse the light emitted by the light guide plate into a uniform surface light source.
传统的导光板是以射出成型的方法将聚甲基丙烯酸甲酯(polymethylmethacrylate，PMMA)制成表面光滑的板块，然后用具高反射率且不吸光的材料，在导光板底面用网版印刷印上圆形或方形的扩散点，当光源置于导光板侧面时，这些扩散点可将光线向上反射，使光线由导光板顶面射出，但由导光板顶面射出的光线不够均匀，需通过扩散板的作用才能形成均匀面光源。The traditional light guide plate is made of polymethylmethacrylate (PMMA) with a smooth surface by injection molding, and then printed on the bottom surface of the light guide plate with a material with high reflectivity and no light absorption. Circular or square diffusion points, when the light source is placed on the side of the light guide plate, these diffusion points can reflect the light upwards, so that the light is emitted from the top surface of the light guide plate, but the light emitted from the top surface of the light guide plate is not uniform enough, it needs to be diffused The function of the plate can form a uniform surface light source.
由于导光板与扩散板是影响背光模块光效率的重要组件，已成为业界长期以来亟待研发改进的目标。Since the light guide plate and the diffuser plate are important components that affect the light efficiency of the backlight module, they have become the targets that the industry needs to develop and improve for a long time.
发明内容 Contents of the invention
针对上述问题，本发明的主要目的在于提供一种导光板，其透光率高，同时可将光源所发出的光线均匀扩散。In view of the above problems, the main purpose of the present invention is to provide a light guide plate with high light transmittance and can evenly diffuse the light emitted by the light source.
为达到上述目的，本发明所提供的一种导光板，其特征在于包括：一基材，由热塑性塑料所制成；多数个反射微粒，散布于所述基材中，平均粒径为0.1μm～100μm，各所述反射微粒分别具有一核心与一壳层，所述壳层由Al2O3、B2O3、BaCO3、Bi2O3、CaCO3、CeO2、Cr2O3、CoO、Co3O4、CuO、Dy2O3、Er2O3、Eu2O3、Fe2O3、Ga2O3、Ge2O3、Gd2O3、HfO2、Ho2O3、In2O3、K2O3、La2O3、Li2CO3、MgO、MgCO3、Mn2O3、Mn3O4、MoO3、Nb2O5、Nd2O3、NiO、PbO、Pb3O4、Pr6O11、Sb2O3、SiO2、Sm2O3、SnO2、SrCO3、Ta2O5、Tb4O7、TeO2、WO3、V2O5、Y2O3、Yb2O3、ZnO或ZrO2所制成。In order to achieve the above object, a light guide plate provided by the present invention is characterized in that it comprises: a substrate made of thermoplastic; a plurality of reflective particles dispersed in the substrate, with an average particle diameter of 0.1 μm ~100 μm, each of the reflective particles has a core and a shell, and the shell is made of Al 2 O 3 , B 2 O 3 , BaCO 3 , Bi 2 O 3 , CaCO 3 , CeO 2 , Cr 2 O 3 , CoO, Co 3 O 4 , CuO, Dy 2 O 3 , Er 2 O 3 , Eu 2 O 3 , Fe 2 O 3 , Ga 2 O 3 , Ge 2 O 3 , Gd 2 O 3 , HfO 2 , Ho 2 O 3 , In 2 O 3 , K 2 O 3 , La 2 O 3 , Li 2 CO 3 , MgO, MgCO 3 , Mn 2 O 3 , Mn 3 O 4 , MoO 3 , Nb 2 O 5 , Nd 2 O 3 , NiO, PbO, Pb 3 O 4 , Pr 6 O 11 , Sb 2 O 3 , SiO 2 , Sm 2 O 3 , SnO 2 , SrCO 3 , Ta 2 O 5 , Tb 4 O 7 , TeO 2 , WO 3 , Made of V 2 O 5 , Y 2 O 3 , Yb 2 O 3 , ZnO or ZrO 2 .
上述本发明的技术方案中，所述核心由SiO2或TiO2所制成。In the above technical solution of the present invention, the core is made of SiO 2 or TiO 2 .
所述壳层的平均厚度为0.05μm～50μm。The average thickness of the shell layer is 0.05 μm˜50 μm.
所述核心与所述壳层由相同材质所制成。The core and the shell are made of the same material.
各所述反射微粒的平均粒径为1μm～10μm。The average particle diameter of each of the reflective particles is 1 μm˜10 μm.
各所述反射微粒的平均粒径为3μm～5μm。The average particle diameter of each of the reflective particles is 3 μm˜5 μm.
各所述反射微粒的重量为所述导光板重量的0.1～20％。The weight of each reflective particle is 0.1-20% of the weight of the light guide plate.
各所述反射微粒约呈球形。Each of the reflective particles is approximately spherical.
采用上述技术方案，本发明由于在导光板内部设有多数个反射微粒，当光线由导光板侧面或底面进入时，光线被这些反射微粒朝各方向反射，而在导光板顶面形成一均匀的面光源，使导光板兼具扩散光线的功能。再者，由于这些反射微粒的粒径极小，几乎不影响导光板的透光率，由肉眼完全看不出与纯PMMA板的差异。由此，本发明的导光板可取代传统导光板与扩散板的组合，降低传统导光板与扩散板间的光损，并提高辉度与均匀度。Adopting the above-mentioned technical solution, the present invention is provided with a plurality of reflective particles inside the light guide plate. When light enters from the side or bottom of the light guide plate, the light is reflected in all directions by these reflective particles, forming a uniform pattern on the top surface of the light guide plate. The surface light source makes the light guide plate also have the function of diffusing light. Furthermore, since the particle size of these reflective particles is extremely small, it hardly affects the light transmittance of the light guide plate, and the difference from the pure PMMA plate cannot be seen by the naked eye. Therefore, the light guide plate of the present invention can replace the combination of the traditional light guide plate and the diffuser plate, reduce the light loss between the traditional light guide plate and the diffuser plate, and improve the luminance and uniformity.
附图说明 Description of drawings
图1是本发明一较佳实施例的示意图。Fig. 1 is a schematic diagram of a preferred embodiment of the present invention.
具体实施方式 Detailed ways
现举以下实施例并结合附图对本发明的结构及功效进行详细说明。The structure and effect of the present invention will be described in detail by citing the following embodiments in conjunction with the accompanying drawings.
如图1所示，本发明一较佳实施例所提供的导光板10包含有一基材12与多数反射微粒14。As shown in FIG. 1 , a
基材12由热塑性塑料所制成，例如甲基丙烯酸树脂(methyl methacrylate resin)、聚氯乙烯(polyvinyl chloride)或聚苯乙烯(polystyrene)，其中，甲基丙烯酸树脂包含有聚甲基丙烯酸甲酯(polymethyl methacrylate)、聚甲基丙烯酸乙酯、聚甲基丙烯酸丙酯、聚甲基丙烯酸丁酯或聚甲基丙烯酸戊酯。The
各反射微粒14呈球形且均匀地散布于基材12中，依据HORIBA LB-500高浓度超微粒径分布分析仪(dynamic light scattering submicron particle size distributionanalyzer)的分析结果，各反射微粒14的平均粒径约为3μm～5μm，各反射微粒14分别具有一核心16与一壳层18，核心16由SiO2所制成，壳层18则由Al2O3所制成，壳层18的平均厚度约为1.5μm～2.5μm，各反射微粒14的重量约为导光板10重量的1％。Each
实际制造时，先将研磨完成的反射微粒14均匀分散至甲基丙烯酸甲酯寡聚物中，再利用浇注方式成型，同时在适当的温度下使甲基丙烯酸甲酯进一步聚合形成聚甲基丙烯酸甲酯(PMMA)，即可形成内部具有多数个反射微粒14的导光板10。In actual manufacturing, the ground
由于本发明的导光板10内部具有多数个反射微粒14，当光线由导光板侧面或底面进入时，光线被这些反射微粒14朝各方向反射，而在导光板10顶面形成一均匀的面光源，使导光板10兼具扩散光线的功能，若光源20设于导光板10侧边，则导光板10底侧可设一反射板22，用于避免光线由导光板10底部漏出(如图1所示)。再者，由于这些反射微粒14的粒径极小，几乎不影响导光板10的透光率，由肉眼完全看不出与纯PMMA板的差异。由此，本发明的导光板10可取代传统导光板与扩散板的组合，降低传统导光板与扩散板间的光损，并提高辉度与均匀度。Since the
基于本发明的精神，导光板的成分、反射微粒的成分或大小均可加以变化，进一步的实验显示：反射微粒的平均粒径在0.1μm～100μm均可，以1μm～10μm较佳，壳层18的平均厚度在0.05μm～50μm亦可，壳层18可由其它金属氧化物如B2O3、BaCO3、Bi2O3、CaCO3、CeO2、Cr2O3、CoO、Co3O4、CuO、Dy2O3、Er2O3、Eu2O3、Fe2O3、Ga2O3、Ge2O3、Gd2O3、HfO2、Ho2O3、In2O3、K2O3、La2O3、Li2CO3、MgO、MgCO3、Mn2O3、Mn3O4、MoO3、Nb2O5、Nd2O3、NiO、PbO、Pb3O4、Pr6O11、Sb2O3、SiO2、Sm2O3、SnO2、SrCO3、Ta2O5、Tb4O7、TeO2、WO3、V2O5、Y2O3、Yb2O3、ZnO或ZrO2所制成。核心16则可由SiO2、TiO2或与壳层18相同材质所制成，各反射微粒14的重量可以是导光板10重量的0.1～20％。举凡此等易于思及的变化，均应为本发明申请专利范围所涵盖。Based on the spirit of the present invention, the composition of the light guide plate, the composition or the size of the reflective particles can be changed. Further experiments show that the average particle size of the reflective particles can be 0.1 μm to 100 μm, preferably 1 μm to 10 μm. The average thickness of 18 can be 0.05 μm to 50 μm, and the
Claims (8)
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| CN2009100072600A CN101806428B (en) | 2009-02-17 | 2009-02-17 | Light guide plate |
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| CN2009100072600A CN101806428B (en) | 2009-02-17 | 2009-02-17 | Light guide plate |
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| CN101806428B true CN101806428B (en) | 2012-01-18 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182964A (en) * | 2011-04-29 | 2011-09-14 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display |
| CN103322440B (en) * | 2012-03-23 | 2015-06-03 | 潘文莘 | Light-emitting module that changes the path of light travel through internal reflection |
| KR20140020493A (en) * | 2012-08-08 | 2014-02-19 | 삼성디스플레이 주식회사 | Light guide plate and manufacturing method of the same |
| CN103923418B (en) * | 2014-05-06 | 2016-02-03 | 南京信息工程大学 | A kind of high ultraviolet absorption ability material and preparation method thereof |
| CN113979747A (en) * | 2021-11-18 | 2022-01-28 | 厦门乃尔电子有限公司 | Modified lead zirconate titanate piezoelectric ceramic with additional bismuth antimonate and preparation method thereof |
| CN115903121A (en) * | 2022-11-22 | 2023-04-04 | 喜洋阳(南京)科技发展有限公司 | Rayleigh scattering light guide plate and manufacturing method thereof |
| CN116482894A (en) * | 2023-04-20 | 2023-07-25 | 苏州桐力光电股份有限公司 | Display module |
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