TWI497131B - 複合型導光板的製造方法及複合型導光板 - Google Patents
複合型導光板的製造方法及複合型導光板 Download PDFInfo
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- G02B5/0263—Diffusing elements; Afocal elements characterised by the diffusing properties with positional variation of the diffusing properties, e.g. gradient or patterned diffuser
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- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
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- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
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Description
本發明涉及一種複合型導光板的製造方法及複合型導光板。
隨著背光模組逐步向輕薄化發展,對背光模組中各種光學膜片的厚度的要求越來越薄,尤其在導光板方面,如何能夠在保持導光板的導光效果的前提下,盡可能的降低導光板的厚度是目前業界所面臨的一大課題。
通常在背光模組中,一般都包括有導光板、反射板、擴散板等光學膜片,上述各光學膜片均分別單獨製作後再組裝到一起以構成背光模組。然而,這樣的組裝方式一方面會因為組裝過程的複雜而導致良率的損失,從而導致成本上升;另一方面,多種光學膜片疊加的組合特點也使得整個背光模組的厚度無法有效降低。
有鑒於此,提供一種能夠解決上述問題的複合型導光板的製造方法及複合型導光板實為必要。
一種複合型導光板的製造方法,其包括如下步驟:提供一反射片,其包括第二結合面以及與該第二結合面相對的底面,在該第二結合面上形成散射網點;提供一注射模具,將該反射片置於該注
射模具的成型腔內並使該反射片的底面貼靠在該成型腔的內壁上;向該成型腔內注入透光性材料以在該第二結合面上形成導光層。
一種複合型導光板,其包括相互疊置且一體成型的導光層以及反射層,在該導光層與該反射層之間分佈有散射粒子。該導光層的折射率大於該反射層的折射率。
與先前技術相比,本發明所提供的該複合型導光板的製造方法以及依照該方法所製造出來的複合型導光板至少具有如下優勢:首先,藉由相互疊置且一體成型的導光層與反射層設計,並同時,在該導光層與該反射層之間加設散射粒子以對進入該複合型導光板內的光線進行充分的散射,使得由該複合型導光板同時具有了導光、反射以及擴散的多重功能,經由該複合型導光板混合後的出射光具有優良的出光亮度以及高度的均勻性;其次,藉由將導光層、反射層以及散射粒子三者合一的一體成型結構,有效的降低了背光模組的厚度,並且簡化了在背光模組的組裝過程中,需要先後組裝導光板、反射板以及擴散板等光學膜片的繁雜工序,並且完全避免了導光板、反射板以及擴散板在進行組裝過程中所產生的良率問題,提高了背光模組的組裝良率,節省了成本;再次,在製造該複合型導光板的過程中,可以按照不同的設計需要來佈置散射粒子的分佈方式,從而使得製作出來的該複合型導光板能夠滿足各種不同的混光需要。
100‧‧‧複合型導光板
10、90‧‧‧導光層
11‧‧‧入光面
12‧‧‧出光面
13‧‧‧第一結合面
20‧‧‧反射層
21、61‧‧‧第二結合面
22、62‧‧‧底面
30‧‧‧散射粒子
60‧‧‧反射片
70‧‧‧散射網點
80‧‧‧注射成型模具
81‧‧‧成型腔
圖1是本發明第一實施方式所提供的複合型導光板的結構示意圖。
圖2是本發明第二實施方式所提供的製造該複合型導光板的流程示意圖。
下面將結合附圖對本發明所提供的實施方式作進一步詳細說明。
請參見圖1,本發明所提供的複合型導光板100,其包括導光層10、反射層20以及散射粒子30。
該導光層10具有一入光面11、與該入光面11鄰接的出光面12以及與該出光面12相對的第一結合面13。光線經由該入光面11射入該複合型導光板100內,並在該複合型導光板100的內部擴散、反射後由該出光面12射出。
該導光層10採用高透光性材料製作,該高透光性材料包括目前導光板所常用的材料,例如PMMA(PolymethylMethacrylate,聚甲基丙烯酸甲酯)、COP(Cycio Olefines Polymers,環烯烴聚合物)以及PC(Polycarbonate,聚碳酸酯)等。
在本實施方式中,該導光層10採用PMMA製作。
該反射層20形成於該導光層10的下方,且與該導光層10一體成型。該反射層20用於反射進入該複合型導光板100內的光線以使得光線由該出光面12射出。
該反射層20包括第二結合面21以及與該第二結合面21相對的底面22,其中該第二結合面21與該導光層10的第一結合面13相互貼合。
優選的,該反射層20所使用的材料的折射率小於該導光層10所使
用的材料的折射率,以利於射入該導光層10內的光線在該反射層20的第二結合面21處發生全反射。
優選的,該反射層20的底面22上進一步形成有反射塗層,從而有效的對進入該反射層20內的光線進行反射,以使該光線由該出光面12射出。
該散射粒子30分散設置在該導光層10的第一結合面13與該反射層20的第二結合面21之間,用於散射進入該複合型導光板100內部的光線,從而使得由該複合型導光板100的出光面12射出的光線的亮度更加的均勻。
優選的,該散射粒子30在該第一結合面13與該第二結合面21之間的分散密度由該導光層10的入光面11開始向著遠離該入光面11的方向逐漸增大,以此來進一步增加由該出光面12射出的光線的均勻性。
請參見圖2,本發明第二實施方式提供了一種如上所述的複合型導光板100的製造方法,其包括如下步驟。
(1)提供一反射片60,其具有一第二結合面61以及與該第二結合面61相對的底面62。
優選的,該底面62上形成有反射塗層。
(2)利用印刷的方式在該第二結合面61上形成點狀的散射網點70。
在本實施方式中,該散射網點70是藉由滾筒印刷的方式將含有TiO2或者BaSO4等高反射率顆粒的油墨印製在該反射片60的第二
結合面61上,然後進行硬化而形成。
在本實施方式中,該散射網點70的密度沿著該第二結合面61的延伸方向變大或者變小。
可以理解的,該散射網點70在該第二結合面61上的分佈方式可以根據不同的光學設計而不同,只要能夠使得分佈在該第二結合面61上的散射網點70對射向該第二結合面61的光線進行充分散射即可。
(3)提供一注射成型模具80,其具有一成型腔81,將該形成有散射網點70的反射片60置於該成型腔81內,使該反射片60的底面62與該成型腔81的內壁貼合。
(4)向該成型腔81內注入透光性材料,以在該反射片60的第二結合面61的上形成導光層90。
用於成型該導光層90的材料可以是PMMA、COP以及PC等常用的導光板成型材料。
優選的,成型該導光層90的材料的折射率大於該反射片60的折射率。
與先前技術相比,本發明實施方式所提供的該複合型導光板以及依照本發明所提供的製造方法所製造出來的該複合型導光板至少具有如下優勢:首先,藉由相互疊置且一體成型的導光層與反射層設計,並同時,在該導光層與該反射層之間加設散射粒子以對進入該複合型導光板內的光線進行充分的散射,使得由該複合型導光板同時具有了導光、反射以及擴散的多重功能,經由該複合型導光板混合後的出射光具有優良的出光亮度以及高度的均勻性
;其次,藉由將導光層、反射層以及散射粒子三者合一的一體成型結構,有效的降低了背光模組的厚度,並且簡化了在背光模組的組裝過程中,需要先後組裝導光板、反射板以及擴散板等光學膜片的繁雜工序,並且完全避免了導光板、反射板以及擴散板在進行組裝過程中所產生的良率問題,提高了背光模組的組裝良率,節省了成本;再次,在製造該複合型導光板的過程中,可以按照不同的設計需要來佈置散射粒子的分佈方式,從而使得製作出來的該複合型導光板能夠滿足各種不同的混光需要。
綜上所述,本發明確已符合發明專利之要件,遂依法提出專利申請。惟,以上所述者僅為本發明之較佳實施方式,自不能以此限制本案之申請專利範圍。舉凡熟悉本案技藝之人士援依本發明之精神所作之等效修飾或變化,皆應涵蓋於以下申請專利範圍內。
60‧‧‧反射片
61‧‧‧第二結合面
62‧‧‧底面
70‧‧‧散射網點
80‧‧‧注射成型模具
81‧‧‧成型腔
90‧‧‧導光層
Claims (9)
- 一種複合型導光板的製造方法,其包括如下步驟:提供一反射片,其包括第二結合面以及與該第二結合面相對的底面,在該第二結合面上形成散射網點;提供一注射模具,將該反射片置於該注射模具的成型腔內並使該反射片的底面貼靠在該成型腔的內壁上;向該成型腔內注入透光性材料以在該第二結合面上形成導光層。
- 如申請專利範圍第1項所述的複合型導光板的製造方法,其中:該散射網點是採用印刷的方式形成在該第二結合面上的。
- 如申請專利範圍第1項所述的複合型導光板的製造方法,其中:該散射網點是採用滾筒印刷的方式形成在該第二結合面上的。
- 如申請專利範圍第1項所述的複合型導光板的製造方法,其中:用於成型該導光層的透光材料的折射率大於該反射片的折射率。
- 如申請專利範圍第1項所述的複合型導光板的製造方法,其中:形成在該第二結合面上的散射網點具有不均勻的分佈密度。
- 一種複合型導光板,其包括相互疊置且一體成型的導光層以及反射層,在該導光層與該反射層之間分佈有散射粒子,該導光層的折射率大於該反射層的折射率。
- 如申請專利範圍第6項所述的複合型導光板,其中:該導光層具有一入光面以及與該入光面連接的第一結合面,該反射層具有第二結合面以及與該第二結合面相對的底面,該第一結合面與該第二結合面相互貼合,該散射粒子夾設在該第一結合面與該第二結合面之間。
- 如申請專利範圍第7項所述的複合型導光板,其中:遠離該入光面處的散 射粒子的分佈密度大於靠近該入光面處的散射粒子的分佈密度。
- 如申請專利範圍第6項所述的複合型導光板,其中:該導光層的材料選自PMMA、COP以及PC三者其中之一。
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US13/556,224 US9170352B2 (en) | 2011-08-03 | 2012-07-24 | Compound optical film |
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CN103511925A (zh) * | 2013-09-18 | 2014-01-15 | 上海向隆电子科技有限公司 | 薄型直下式背光模块 |
US9470834B2 (en) * | 2014-12-01 | 2016-10-18 | Shenzhen China Star Optoelectronics Technology Co., Ltd | Light guide plate and manufacturing method thereof |
CN104832886B (zh) | 2015-05-06 | 2018-05-08 | 合肥京东方显示光源有限公司 | 导光板、背光模组、制作导光板的设备及方法 |
US11043655B2 (en) * | 2019-06-28 | 2021-06-22 | Intel Corporation | Efficiency organic light emitting diode displays |
KR20210121973A (ko) * | 2020-03-31 | 2021-10-08 | 코닝 인코포레이티드 | 도광패널 및 이를 포함하는 조명장치 |
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JP2012507118A (ja) * | 2008-10-27 | 2012-03-22 | スリーエム イノベイティブ プロパティズ カンパニー | 勾配抽出を備える半鏡面の中空のバックライト |
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TW200916904A (en) * | 2007-10-03 | 2009-04-16 | 3M Innovative Properties Co | Lightguide lamination to reduce reflector loss |
US20090186152A1 (en) * | 2008-01-17 | 2009-07-23 | Tzeng-Ke Shiau | Light Guide Plate and Manufacturing Method thereof |
TW201107675A (en) * | 2009-08-19 | 2011-03-01 | Coretronic Corp | Light guide film and light source module |
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US20160011343A1 (en) | 2016-01-14 |
US20130033754A1 (en) | 2013-02-07 |
TW201307914A (zh) | 2013-02-16 |
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