TWM540240U - 可消除色散的直射式led照明模組 - Google Patents
可消除色散的直射式led照明模組 Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
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- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
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- F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
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- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
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- F21S41/141—Light emitting diodes [LED]
- F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
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- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/25—Projection lenses
- F21S41/255—Lenses with a front view of circular or truncated circular outline
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- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/285—Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24 - F21S41/2805
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- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
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- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
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- G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
- G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
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- 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
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
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- F21W2102/20—Illuminance distribution within the emitted light
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- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
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- H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
- H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
- H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
- H01L25/075—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00
- H01L25/0753—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00 the devices being arranged next to each other
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Description
本創作係有關於一種照明模組,特別是指一種應用於車輛等交通工具,且可消除色散之直射式LED照明模組。
發光二極體(Light-Emitting Diode;LED)為一種半導體元件,其具有體積小、效率高、壽命長、不易破損等傳統光源無法與之比較的優點,加正向電壓時,發光二極體能發出單色且不連續的光源,而藉由改變螢光粉的組成,可使發光二極體發出在不同的各色光源。然而,因為光通量以及抗熱衰能力的先天性問題,使得其以往難以應用於車用燈具。
近年來,隨著製程與技術的改良,LED之光通量與抗熱衰能力大幅提升,其體積小、亮度高的特性,非常適合用於被限制在有限空間內的車用燈具設計,因而有導入作為汽車頭燈的趨勢。然而,傳統的汽車頭燈大致上採用雙曲面反射鏡或是拋物面鏡的設計,不論是何種架構,都難以讓LED本身的特性(發光面積小且集中、光源指向性高、光熱分離)發揮優勢;因此,傳統頭燈的光學架構並不適用在LED光源。
而LED光源本身因為採用螢光粉的原因,具有一定程度的空間色偏現象;若是應用於光學系統中有存在折射元件(譬如為透鏡),則會有色散現象的產生,導致整體光型的空間色偏情形更為嚴重。因此,如何在維持一定光強度的情況下解決色偏現象,可以說是LED應用於車用燈具最棘手的問題。
前案譬如為中國專利公告第204611663號專利,利用兩種不同折射係數的透鏡來耦合成單一透鏡,藉由兩種透鏡折射係數的差異,使不同波長的光程差接近,來消除LED光源車燈之色差。但兩種材質透鏡之耦合連接的製程技術難度高,使得成本也高,同時材料的選擇也受到限制,應用層面不高。又,譬如中國專利公告第103672733號專利,其利用將特定區域噴砂打霧,以消除特定區域的色散現象;但也使得光線穿透率大幅減損,連帶嚴重影響整體光學效率。
故,如何突破LED應用於車用燈具的缺失,來於維持一定光強度的情況下解決空間色偏現象,實為一項具實用價值的技術課題。
鑑於以上的問題,本創作的主要目的在於提出一種可消除色散的直射式LED照明模組,可藉由微結構降低光型空間色偏現象,進而達到消除色散的目的,使得LED照明模組可以符合相關法令的規範,適用於各種車輛載具;再者,其製造成本低,且易於量產,有助於提高產品之市場競爭力。
為達上述目的,本創作所揭露之一種可消除色散的直射式LED照明模組,包含有發光二極體(LED)光源與平凸透鏡,發光二極體光源設置於平凸透鏡的焦點上,藉由平凸透鏡的型態來調整所需之光型,且平凸透鏡包含有凸面與平面,發光二極體光源設置於平面一側,使其所發出之光線經由平面入射、再由凸面出射;且平面上更具有微結構,微結構的每一維度之尺寸係為0.8-4.0毫米(mm),並分佈於與發光二極體光源之光軸夾角大於15度之外的區域,藉以消除透鏡本身產生的空間色偏現象,進而達到消除色散的目的。
本創作中使用的微結構分佈之區域係不超過平凸透鏡之整體平面的40%;且型態以沿著平面延伸、朝外凸起的柱狀物為佳,譬如為截面形狀為圓弧形或三角形之柱狀物,上述所指維度則為其寬與高,如此一來,則能有效達到消除色散的功效。
有關本創作之詳細內容及技術,茲就配合圖式說明如下。
為清楚揭露本創作所揭露的可消除色散的直射式LED照明模組的技術特徵,以下將提出數個實施例以詳細說明本創作的技術特徵,更同時佐以圖式俾使該些技術特徵得以彰顯。
請參照第1圖,繪示本創作第一實施例之可消除色散的直射式LED照明模組的示意圖。
本實施例之可消除色散的直射式LED照明模組,如第1圖所示,其包含有發光二極體(LED)光源10與平凸透鏡20,發光二極體光源10可包含有一個以上之發光二極體晶片,其設置於平凸透鏡20之焦點上;平凸透鏡20包含有平面21與凸面22,發光二極體光源10設置於平面21一側,使其所發出之光線經由平面入射、再由凸面出射。
平凸透鏡20之凸面22的型態,主要用來產生所需要的光型,其可根據所需應用的產品來加以設計變更,譬如應用於車頭燈時,由於車燈法規對於偏離中心區域的部分也有規範最低光強度要求,因此可利用多重聚焦透鏡調制大角度區域的光型。如第2圖所示,為本創作第二實施例之可消除色散的直射式LED照明模組的示意圖。平凸透鏡20是由複數個共焦透鏡201以水平方向合成來組成,此些透鏡201之焦點設計為共點,而發光二極體光源10則設置於其共同焦點的位置。而其中每一透鏡201可根據需要調製的光源、光型等,由不同型態或曲度透鏡201切割出來,且每一透鏡201之垂直方向的曲度也可不對稱;如圖中所繪示係為利用四組透鏡201來加以合成,但此僅為示意,並非用以限定僅能採用四組,其組數、區度、或是對稱、型態皆可根據所需要調製的光源、光型來加以變化。
車頭燈之法令規範,主要可參考ECE R112 Class B之部份,其針對車頭燈各位置的亮度規範,與上述第2圖之實施態樣所模擬出的數值來加以比較,詳見下表一。
表一
<TABLE border="1" borderColor="#000000" width="_0001"><TBODY><tr><td> 取樣點位置 </td><td> 角座標 </td><td> 光強度值(cd) </td><td> 規範需求(cd) </td></tr><tr><td> Imax </td><td> </td><td> 65,300 </td><td> 40,500 </td></tr><tr><td> H-V </td><td> 0.0,0.0 </td><td> 63,700 </td><td> 0.8 Imax (52,240) </td></tr><tr><td> H-5L </td><td> 0.0,5 L </td><td> 8,100 </td><td> 5,100 </td></tr><tr><td> H-2.5L </td><td> 0.0, 2.5 L </td><td> 41,100 </td><td> 20,300 </td></tr><tr><td> H-2.5R </td><td> 0.0, 2.5 R </td><td> 41,600 </td><td> 20,300 </td></tr><tr><td> H-5R </td><td> 0.0, 5 R </td><td> 8,300 </td><td> 5,100 </td></tr></TBODY></TABLE>
因此,就此一型態之模擬數值來看,其發光強度皆能符合相關法令的規範。
由於LED光源之波長、光程差等原因會有色散的情況,舉例來說,若是以常見的白光LED來說,其白光產生方式是藉由藍光晶片激發黃光螢光粉,進而產生白光,因此其發光頻譜主要集中在短波長的藍光與長波長的黃光兩大部分,此兩種色光對於透鏡的折射率並不同,若是以PC材質而言,黃光折射係數為1.589,藍光折射係數為1.608,所以黃光偏折程度會低於藍光,這物理現象導致了在譬如25公尺處產生的光型也不相同,就會產生色散現象,因此車燈的光型分佈存在色度空間分佈不均的問題。
由於透鏡中央區域其黃光與藍光由於入射角度小並且光型中間區域幾乎為準直光出射,因此在中央區域其色度分佈為均勻白光;但在光型邊緣區域的部分,因為黃光與藍光在離開透鏡時的角度差異較大,因此情況會較為嚴重,故在上下兩側造成的色散最為明顯,其中又以與LED發光面光軸夾角超過15度的區域最為明顯。
因此,請參照第3A、3B圖,繪示本創作可消除色散的直射式LED照明模組的微結構分佈範圍之示意圖。
為了降低加工的難易度,本創作將微結構23設置於平凸透鏡20之平面21一側,如同前面所闡述,微結構23是用來消除色散的情況,因此其分佈於與發光二極體光源10之光軸夾角大於15度之外的區域,也就是色散情況最為明顯的區域,同時,微結構23的每一維度之尺寸較佳為0.8-4.0毫米(mm),來達成消除色散的目的;另外,因為增加微結構23會降低光線的穿透率,進而影響燈具的光強度,因此,微結構23分佈的區域較佳為不超過平凸透鏡20之平面21的40%。
請參閱第4圖,其中微結構23為包含有複數個由平凸透鏡20之平面朝外凸起的柱狀物,因此,微結構23的維度則指其寬與高;另一方面,其截面形狀可為圓弧形(見第5A圖)或是三角形(見第5B圖),當為圓弧形時,則其弦長與弦高的尺寸為0.8-4.0毫米,當為三角形時,則其底與高的尺寸為0.8-4.0毫米,如此一來則能有效消除色散情況。
配合前述第2圖的實施態樣,微結構23的配置除了分佈於平凸透鏡20之平面21之上、下兩側,且為水平直向分佈,以其中截面形狀為半圓形之例子,其相關模擬數據如下表二:
表二
<TABLE border="1" borderColor="#000000" width="_0002"><TBODY><tr><td> 取樣點位置 </td><td> 光強度值(cd) </td><td> 光強度值(加入微結構)(cd) </td><td> 光強度維持率 </td></tr><tr><td> Imax </td><td> 65,300 </td><td> 49,400 </td><td> 76% </td></tr><tr><td> H-V </td><td> 63,700 </td><td> 47,700 </td><td> 75% </td></tr><tr><td> H-5L </td><td> 8,100 </td><td> 6,500 </td><td> 80% </td></tr><tr><td> H-2.5L </td><td> 41,100 </td><td> 29,500 </td><td> 72% </td></tr><tr><td> H-2.5R </td><td> 41,600 </td><td> 30,200 </td><td> 73% </td></tr><tr><td> H-5R </td><td> 8,300 </td><td> 6,600 </td><td> 80% </td></tr></TBODY></TABLE>
因此,加入此微結構23後,其模擬數值不僅依舊能符合法令規範,且考量製成燈具裝置後,會有5-8%的光損,再者,以其中模擬數值最接近規範值的Imax來說,其僅高於標準規範38%;因此,整體光強度皆維持70%以上的情況,自然可理解製成燈具裝置後也能符合相關法令規範。
同時,因前述微結構23的配置範例,是以配合第2圖的實施態樣來設計,根據實際使用的需求,配置的區域也可以設計為非對稱式,當然,每一柱狀物的高度、寬度也可以不同,配置角度也可以非為水平,圖中所繪示僅為示意說明,並非用以限定其應用方式與範圍。
綜上所述,藉由本創作所提出之可消除色散的直射式LED照明模組,乃將微結構設置於平凸透鏡之平面上,且LED光源設置於平面一側之焦點,使其由平面入射再由凸面出射,藉以消除因LED光源本身產生的空間色偏現象,進而達到消除色散的目的;再者,微結構設置於平凸透鏡之平面上,使得加工難易度大幅降低,有效降低成本,凸面的部份可配合使用的狀態來調整,調配出所需要的光型,除了採用多個透鏡組合的方式外,也可於凸面之表面直接形成各種紋路或是圖樣,不僅能適用於車用燈光裝置,同時也能應用於各種照明需求,進而為產品提高附加價值,並創造市場新商機。
雖然本創作以前述之較佳實施例揭露如上,然其並非用以限定本創作,任何熟習此技藝者,在不脫離本創作之精神和範圍內,當可作些許之更動與潤飾,因此本創作之保護範圍當視後附之申請專利範圍所界定者為準。
10‧‧‧發光二極體光源
20‧‧‧平凸透鏡
201‧‧‧透鏡
21‧‧‧平面
22‧‧‧凸面
23‧‧‧微結構
20‧‧‧平凸透鏡
201‧‧‧透鏡
21‧‧‧平面
22‧‧‧凸面
23‧‧‧微結構
第1圖為本創作第一實施例之可消除色散的直射式LED照明模組的示意圖。 第2圖為本創作第二實施例之可消除色散的直射式LED照明模組的示意圖。 第3A、3B圖為本創作之可消除色散的直射式LED照明模組的微結構分佈範圍之示意圖。 第4圖為本創作之可消除色散的直射式LED照明模組的微結構之局部放大圖。 第5A、5B圖為本創作之可消除色散的直射式LED照明模組的微結構之剖面示意圖。
10‧‧‧發光二極體光源
20‧‧‧平凸透鏡
201‧‧‧透鏡
21‧‧‧平面
22‧‧‧凸面
23‧‧‧微結構
Claims (11)
- 一種可消除色散的直射式LED照明模組,係包含有: 一發光二極體(LED)光源,可發射一光線;以及 一平凸透鏡,具有一凸面與一平面,設置於鄰近該發光二極體光源,使該發光二極體光源位於該平凸透鏡之一焦點上,該發光二極體光源所發射之該光線係由該平面入射、並由該凸面出射,該平面上更具有一微結構,該微結構的每一維度之尺寸係為0.8-4.0毫米(mm),且該微結構係分佈於與該發光二極體光源之一光軸夾角大於15度之外的區域。
- 如請求項第1項所述之可消除色散的直射式LED照明模組,其中該發光二極體光源包含一個以上之發光二極體晶片。
- 如請求項第1項所述之可消除色散的直射式LED照明模組,其中該平凸透鏡係由複數個共焦透鏡所組成,該發光二極體光源設置於該些透鏡之共同焦點上。
- 如請求項第3項所述之可消除色散的直射式LED照明模組,其中該些透鏡係水平方向結合配置。
- 如請求項第1項所述之可消除色散的直射式LED照明模組,其中該微結構分佈之該區域係不超過該平凸透鏡之該平面的40%。
- 如請求項第1項所述之可消除色散的直射式LED照明模組,其中該微結構係包含有複數個由該平凸透鏡之該平面朝外凸起的柱狀物。
- 如請求項第6項所述之可消除色散的直射式LED照明模組,其中該些柱狀物之截面形狀係為圓弧形。
- 如請求項第6項所述之可消除色散的直射式LED照明模組,其中該些柱狀物之截面形狀係為三角形。
- 如請求項第6項所述之可消除色散的直射式LED照明模組,其中該微結構之該些維度之尺寸係指該些柱狀物之寬與高。
- 如請求項第6項所述之可消除色散的直射式LED照明模組,其中該微結構之該些柱狀物係分佈於該平凸透鏡之該平面之上下兩側。
- 如請求項第10項所述之可消除色散的直射式LED照明模組,其中該柱狀物係沿著上下方向配置,且該微結構之排列方向係垂直於配置方向。
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CN201720112562.4U CN206449556U (zh) | 2016-12-30 | 2017-02-07 | 可消除色散的直射式led照明模块 |
EP17195074.4A EP3348438B1 (en) | 2016-12-30 | 2017-10-05 | Direct-emission led illumination module for eliminating chromatic dispersion |
DK17195074.4T DK3348438T3 (da) | 2016-12-30 | 2017-10-05 | Direkte emitterende LED-belysningsmodul til eliminering af chromatisk dispersion |
ES17195074T ES2908659T3 (es) | 2016-12-30 | 2017-10-05 | Módulo de iluminación LED de emisión directa para eliminar la dispersión cromática |
JP2017004623U JP3214118U (ja) | 2016-12-30 | 2017-10-10 | 色分散を解消できる直射式led照明モジュール |
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TWI706109B (zh) * | 2017-08-24 | 2020-10-01 | 大陸商東莞巨揚電器有限公司 | 具有微結構的透光結構體及其燈具 |
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TWI706109B (zh) * | 2017-08-24 | 2020-10-01 | 大陸商東莞巨揚電器有限公司 | 具有微結構的透光結構體及其燈具 |
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