CN107816645B - 一种超薄型led条形灯 - Google Patents

一种超薄型led条形灯 Download PDF

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CN107816645B
CN107816645B CN201610817335.1A CN201610817335A CN107816645B CN 107816645 B CN107816645 B CN 107816645B CN 201610817335 A CN201610817335 A CN 201610817335A CN 107816645 B CN107816645 B CN 107816645B
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light
light guide
light source
groove
guide plate
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CN107816645A (zh
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季丰
郑兆勇
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Ningbo Self Electronics Co Ltd
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Priority to EP17190507.8A priority patent/EP3293448A1/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • 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
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/10—Construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S4/00—Lighting devices or systems using a string or strip of light sources
    • F21S4/20—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports
    • F21S4/28—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports rigid, e.g. LED bars
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
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    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F21V7/00—Reflectors for light sources
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source
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    • G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
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    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
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    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F21V15/00—Protecting lighting devices from damage
    • F21V15/01—Housings, e.g. material or assembling of housing parts
    • F21V15/015—Devices for covering joints between adjacent lighting devices; End coverings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/507—Cooling arrangements characterised by the adaptation for cooling of specific components of means for protecting lighting devices from damage, e.g. housings
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    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F21V29/89—Metals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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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
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Abstract

一种超薄型LED条形灯，其包括一个条形灯架，一个光源模组，一条反光膜，一条导光板，以及一条灯罩。所述光源模组包括一条电路板，所述电路板与辅件放置板之间的夹角大于80度且小于90度。所述反光膜为漫反射膜并放置在所述辅件放置板上。所述扩散面的宽度为所述光源模组的3至4倍并设置有导光点，所述圆斑的面积占所述扩散面的总面积的50％至55％。所述灯罩设置在所述导光板的出光方向上且透光率小于90％。所述LED条形灯通过设计所述光源模组的出光方向与反光膜及导光板之间的夹角，扩散面的宽度与灯罩的透光率之间的参数关系，以及导光板的扩散面的宽度与导光板上导光点的密度参数关系，使得所述超薄型LED条形灯不仅可以做到尺寸超薄，而且光效很好。

Description

一种超薄型LED条形灯
技术领域
本发明涉及一种照明设备，特别是一种超薄型LED条形灯。
背景技术
一般的日常生活中，随处都可见到各种照明设备，例如，日光灯、路灯、台灯、艺术灯等。在上述的照明设备中，传统上大部分是以钨丝灯泡做为发光光源。近年来，由于科技日新月异，已利用发光二极管(LED)作为发光来源。甚者，除照明设备外，对于一般交通号志、广告牌、车灯等，亦都改为使用发光二极管做为发光光源。如前所述，使用发光二极管作为发光光源，其好处在于省电，且亮度更大，故于使用上已逐渐普通化。
随着LED灯具的普及，越来越多的场合开始使用LED灯具。对于日益普通使用的LED条形灯具，其一般都使用在一些柜内，如立式冰柜，卧式冰柜，货架，厨柜等。这些使用场合在制造时，一般都不会预留灯具的专用安装位置，往往都是后期增加上去的。因此在上述的这些使用场合中，为了不使用户感觉灯具的突兀与炫光，往往要求灯具要薄且小，但要亮度足够。
发明内容
有鉴于此，有必要提供一种利于缩小灯具结构体积的超薄型LED条形灯，以满足上述需求。
一种超薄型LED条形灯，其包括一个条形灯架，一个收容在所述条形灯架中的光源模组，一条设置在所述条形灯架上的反光膜，一条设置在所述反光膜上的导光板，以及一条设置在所述导光板的出光方向上的灯罩。所述条形灯架包括一个光源设置槽，以及一个与所述光源设置槽的一条壁连接的辅件放置板。所述光源模组包括一条电路板，所述电路板与辅件放置板之间的夹角大于80度且小于90度。所述反光膜为漫反射膜并放置在所述辅件放置板上。所述导光板设置在所述反光膜上并包括一条接收所述光源模组的出射光的入射壁，三条反射光线的反射壁，以及一个与所述反光膜接触的扩散面。所述反射壁上设置有反光层。所述扩散面的宽度为所述光源模组的3至4倍并设置有导光点，所述导光点包括多个间隔设置的圆斑。所述圆斑的面积占所述扩散面的总面积的50％至55％。所述灯罩设置在所述导光板的出光方向上且透光率小于90％。
进一步地，所述电路板上涂覆有白色反光油墨。
进一步地，所述光源设置槽的两端的底部分别开设有一个缺口，所述辅件放置板上开设有一条端盖卡接槽，所述卡接槽两端的两个侧壁上分别开设一个U形槽。
进一步地，所述LED条形灯包括两个设置在所述条形灯架两端的端盖，所述端盖包括一个底盖，一个从所述底盖上延伸出来的穿线槽，以及一个从所述底盖上延伸出来的卡接爪，所述穿线槽容置在所述缺口中，所述卡接爪插设在所述卡接槽中并卡设在所述U形槽上。
进一步地，所述电路板与所述光源设置槽的开口间隔设置。
进一步地，所述光源模组还包括一个设置在所述电路板上的散热条，该散热条贴设在所述电路板上，并与所述光源设置槽的侧壁相接触。
进一步地，所述电路板与辅件放置板之间的夹角为85度。
进一步地，所述灯罩包括一个出光面，以及一个一条侧边与该出光面连接的卡设槽，所述出光面设置在所述导光板的出光方向上，所述卡设槽卡设在所述辅件放置板，所述出光面的一条侧边卡接在所述光源设置槽的内侧壁上。
进一步地，所述卡设槽与光源设置槽的外侧壁上分别设置有一条安装槽。
进一步地，所述导光板的厚度与LED芯片的长度或最大直径相当。
与现有技术相比，所述超薄型LED条形灯利用侧发光原理，通过设置所述光源模组的出光方向与反光膜及导光板之间的夹角，导光板的扩散面的宽度与灯罩的透光率之间的参数关系，以及导光板的扩散面的宽度与导光板上导光点的密度参数关系，使得所述超薄型LED条形灯不仅可以做到尺寸超薄，而且光效很好，没有炫光，增加用户体验效果。
附图说明
以下结合附图描述本发明的实施例，其中：
图1为本发明提供的一种超薄型LED条形灯的分解结构示意图。
图2为图1的超薄型LED条形灯的剖面结构示意图。
图3为图1的超薄型LED条形灯所具有的导光板的结构示意图。
具体实施方式
以下基于附图对本发明的具体实施例进行进一步详细说明。应当理解，此处所描述的具体实施例仅作为实施例，并不用于限定本发明的保护范围。
请参阅图1及图2，其为本发明所提供的一种超薄型LED条形灯100的结构示意图。所述超薄型LED条形灯100包括一个条形灯架10，一个收容在所述条形灯架10中的光源模组20，一条设置在所述条形灯架10上的反光膜30，一条设置在所述反光膜30上的导光板40，一条设置在所述导光板40的出光方向上的灯罩50，以及两个分别设置在所述条形灯架10的两端的端盖60。可以想到的是，所述超薄型LED条形灯100还包括其他的一些功能元件，如导线组件，电连接插接组件，以及安装组件等等，在此不再详细说明，其应为本领域技术人员所习知的技术。
所述条形灯架10包括一个光源设置槽11，以及一个与所述光源设置槽11的一条壁连接的辅件放置板12。为了便于散热，所述条形灯架10可以由导热材料制成，如金属或导热塑料等，在本实施例中，所述条形灯架10由铝合金制成。所述光源设置槽11用于设置所述光源模组20，因此其宽度与光源模块20的宽度相当。为了卡设所述光源模组20，所述光源设置槽11的两条侧壁上分别设置有两条凸条111，该两条凸条111与该光源设置槽11的底部一起来卡设所述光源模组20。为了引出电连接插接组件的导线，所述光源设置槽11的底部的两端分别开设有一个缺口112。为了固定所述端盖60，所述辅件放置板12上开设有一条端盖卡接槽121。该端盖卡接槽121的两端的两个侧壁上分别设置有一个U形槽122。所述缺口112、端盖卡接槽121，以及U形槽122会在配合下面的端盖60一起进行说明。
所述光源模组20包括多个LED芯片21，一个用于设置所述LED芯片21的电路板22，以及一个设置在所述电路板上的散热条23。所述LED芯片21为一种能够将电能转化为可见光的固态的半导体器件，它可以直接把电转化为光能，其具有节能，冷光，体积小的特点，并为本领域技术人员所习知，在此不再赘述。所述电路板22可以为印刷电路板，用于为每一个LED芯片21提供能源，其本身的结构及工作原理为现有技术，不再详细说明。所述电路板22抵顶在所述光源设置槽11的两条凸条111上，以与该光源设置槽11的底部一起来卡设固定所述光源模组20。所述电路板22与辅件放置板12之间的夹角大于80度且小于90度，以利于所述光源模组20的出射光可以更多地照射在所述辅件放置板12上。在实施例中，所述电路板22与辅件放置板12之间的夹角为85度。所述为了达到挡光的目的，所述电路板22与所述光源设置槽22的开口间隔设置，以利于避免所述LED芯片直接从所述LED芯片21与导光板40的间隙射出，从而形成炫光。所述电路板22在设置有LED芯片21的表面上涂覆有白色反光油墨。该白色反光油墨有利于提供光效，即将投射到该电路板22上的反再反射回去。所述散热条23贴设在所述电路板22上，并与所述光源设置槽11的三个侧壁相接触，以利于尽可能多且快地将所述LED芯片21产生的热传导出去，因此所述散热条23由导热材料制成，如金属。
所述反光膜30用于将照射向辅件放置板12的光反射向导光板40，由于LED芯片21的出射光为非散射光，而多为直射光，因此，为了使该条形灯100的出射面上的光均匀，需要将该直射光打乱成散射光，因此，所述反光膜30为漫反射反光膜。所述反光膜30由反光材料涂覆在纸上制成，同时该反光材料无序涂覆。
请一并参阅图3，所述导光板40设置在所述反光膜30上并包括一条接收所述光源模组20的出射光的入射壁41，三条反射光线的反射壁42，以及一个与所述反光膜30接触的扩散面43。所述导光板40为一种现有技术，一般由利用光学级的亚克力/PC板材制成，其厚度与LED芯片21的宽度或最大直径相当。所述入射壁41与所述光源模组20的多个LED芯片21紧贴以接收来自该LED芯片21的出射光。所述三条反射壁42上分别设置有反光层421。该每一个反光层421为漫反射反光纸。所述扩散面43上设置有多个导光点431。所述多个导光点由具有极高反射率且不吸光的材料用UV网版印刷技术印制。利用所述导光板40本身来接收从所述LED芯片21发出来的光，当光线射到各个导光点431时，反射光会往各个角度扩散，然后破坏反射条件由导光板40的出射面射出。通过设置所述导光点431的疏密程度可使导光板40均匀发光。在本发明中所述导光点431包括多个间隔设置的圆斑，该圆斑的总面积点所述扩散面43的总面积的50％至55％。
所述灯罩50设置在所述导光板40的出光方向上，其作用在于一是保护导光板40不被磨损，二是将所述导光板40、反光膜30、以及两个端盖60组装在一个封闭空间内，形成一个整体。所述灯罩50包括一个出光面51，以及一个一条侧边与该出光面51连接的卡设槽52。所述出光面51设置在所述导光板40的出光方向上，且其一条边可以插设在光源设置槽11的内侧壁中，达到紧固的目的。所述卡设槽52卡设在所述灯架10的辅件放置板12上，从而可以完成该灯罩50的组装。由于所述超薄型LED条形灯100仅有一个出光面，且所述导光板40的厚度与LED芯片21的长度或最大直径相当，且该导光板40的宽度为LED芯片21的长度或最大直径的3倍或4倍之间，因此所述灯罩50的透光率小于90％以防止炫光。所述卡设槽52与光源设置槽11的外侧壁上分别设置有一条第一、第二安装槽521、113，以便于通过卡扣来安装该LED条形灯100。
所述端盖60插设在所述LED条形灯100的两端，其包括一个底盖61，一个从所述底盖61上延伸出来的穿线槽62，以及一个从所述底盖62上延伸出来的卡接爪63。所述端盖60的结构比较复杂，因此其适合由塑料等塑性材料注塑成型制成。所述底盖61盖设在由所述灯架10和灯罩60形成矩形框上，从而使整个灯具组装完成。所述穿线槽62容置在所述灯架10的缺口112中，以便于电性连接在电路板22上的电连接插接组件能够伸出灯具的外面与外部电源连接。所述卡接爪63插设在所述灯架10的辅件放置板12的卡接槽121中并卡设在所述U形槽122上。如图所示，所述卡接爪63包括两个弹性条631，以及分别设置该两个弹性条631的一端的凸起632。该两个凸起632分别卡设在所述U形槽122中，从而要以固定所述端盖60的相对位置。
与现有技术相比，所述超薄型LED条形灯100利用侧发光原理，通过设置所述光源模组20的出光方向与反光膜30及导光板40之间的夹角，导光板40的扩散面的宽度与灯罩50的透光率之间的参数关系，以及导光板40的扩散面的宽度与导光板40上导光点的密度参数关系，使得所述超薄型LED条形灯100不仅可以做到尺寸超薄，而且光效很好，没有炫光，增加用户体验效果。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则的内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (7)

1.一种超薄型LED条形灯，其特征在于：所述LED条形灯包括一个条形灯架，一个收容在所述条形灯架中的光源模组，一条设置在所述条形灯架上的反光膜，一条设置在所述反光膜上的导光板，以及一条设置在所述导光板的出光方向上的灯罩，所述条形灯架包括一个光源设置槽，以及一个与所述光源设置槽的一条壁连接的辅件放置板，所述光源模组包括一条电路板，所述电路板与辅件放置板之间的夹角大于80度且小于90度，所述反光膜为漫反射膜并放置在所述辅件放置板上，所述导光板设置在所述反光膜上并包括一条接收所述光源模组的出射光的入射壁，三条反射光线的反射壁，以及一个与所述反光膜接触的扩散面，所述反射壁上设置有反光层，所述扩散面的宽度为所述光源模组的3至4倍并设置有导光点，所述导光点包括多个间隔设置的圆斑，所述圆斑的面积占所述扩散面的总面积的50％至55％，所述灯罩设置在所述导光板的出光方向上且透光率小于90％；所述光源模组还包括一个设置在所述电路板上的散热条，该散热条贴设在所述电路板上，并与所述光源设置槽的侧壁相接触；所述入射壁与所述光源模组的多个LED芯片紧贴以接收来自该LED芯片的出射光；所述光源设置槽的两端的底部分别开设有一个缺口，所述辅件放置板上开设有一条端盖卡接槽，所述卡接槽两端的两个侧壁上分别开设一个U形槽；所述LED条形灯包括两个设置在所述条形灯架两端的端盖，所述端盖包括一个底盖，一个从所述底盖上延伸出来的穿线槽，以及一个从所述底盖上延伸出来的卡接爪，所述穿线槽容置在所述缺口中，所述卡接爪插设在所述卡接槽中并卡设在所述U形槽上；所述卡接爪包括两个弹性条，以及分别设置该两个弹性条的一端的凸起，该两个凸起分别卡设在所述U形槽中。
2.如权利要求1所述的超薄型LED条形灯，其特征在于：所述电路板上涂覆有白色反光油墨。
3.如权利要求1所述的超薄型LED条形灯，其特征在于：所述电路板与所述光源设置槽的开口间隔设置。
4.如权利要求1所述的超薄型LED条形灯，其特征在于：所述电路板与辅件放置板之间的夹角为85度。
5.如权利要求1所述的超薄型LED条形灯，其特征在于：所述灯罩包括一个出光面，以及一个一条侧边与该出光面连接的卡设槽，所述出光面设置在所述导光板的出光方向上，所述卡设槽卡设在所述辅件放置板，所述出光面的一条侧边卡接在所述光源设置槽的内侧壁上。
6.如权利要求5所述的超薄型LED条形灯，其特征在于：所述卡设槽与光源设置槽的外侧壁上分别设置有一条安装槽。
7.如权利要求1所述的超薄型LED条形灯，其特征在于：所述导光板的厚度与LED芯片的宽度或最大直径相当。
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