TWI537526B - 包含定位於接近波導管下表面的光源之照明裝置 - Google Patents

包含定位於接近波導管下表面的光源之照明裝置 Download PDF

Info

Publication number
TWI537526B
TWI537526B TW099123013A TW99123013A TWI537526B TW I537526 B TWI537526 B TW I537526B TW 099123013 A TW099123013 A TW 099123013A TW 99123013 A TW99123013 A TW 99123013A TW I537526 B TWI537526 B TW I537526B
Authority
TW
Taiwan
Prior art keywords
waveguide
illumination device
emitting diode
light emitting
transparent material
Prior art date
Application number
TW099123013A
Other languages
English (en)
Other versions
TW201113475A (en
Inventor
瑟吉Ｊ 比爾惠山
Original Assignee
飛利浦露明光學公司
皇家飛利浦電子股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 飛利浦露明光學公司, 皇家飛利浦電子股份有限公司 filed Critical 飛利浦露明光學公司
Publication of TW201113475A publication Critical patent/TW201113475A/zh
Application granted granted Critical
Publication of TWI537526B publication Critical patent/TWI537526B/zh

Links

Classifications

    • 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
    • G02B6/0081—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
    • G02B6/0086—Positioning aspects
    • G02B6/0091—Positioning aspects of the light source relative to the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0026—Wavelength selective element, sheet or layer, e.g. filter or grating
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0031—Reflecting element, sheet or layer
    • 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
    • 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
    • G02B6/0066—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 characterised by the light source being coupled to the light guide
    • G02B6/0073—Light emitting diode [LED]
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133553—Reflecting elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133611—Direct backlight including means for improving the brightness uniformity
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133621—Illuminating devices providing coloured light
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/483—Containers
    • H01L33/486—Containers adapted for surface mounting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/52—Encapsulations
    • H01L33/54—Encapsulations having a particular shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/58—Optical field-shaping elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/58—Optical field-shaping elements
    • H01L33/60—Reflective elements
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2933/00—Details relating to devices covered by the group H01L33/00 but not provided for in its subgroups
    • H01L2933/0008—Processes
    • H01L2933/0033—Processes relating to semiconductor body packages
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2933/00—Details relating to devices covered by the group H01L33/00 but not provided for in its subgroups
    • H01L2933/0008—Processes
    • H01L2933/0033—Processes relating to semiconductor body packages
    • H01L2933/005—Processes relating to semiconductor body packages relating to encapsulations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2933/00—Details relating to devices covered by the group H01L33/00 but not provided for in its subgroups
    • H01L2933/0008—Processes
    • H01L2933/0033—Processes relating to semiconductor body packages
    • H01L2933/0058—Processes relating to semiconductor body packages relating to optical field-shaping elements

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Power Engineering (AREA)
  • Led Device Packages (AREA)
  • Planar Illumination Modules (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Led Devices (AREA)

Description

包含定位於接近波導管下表面的光源之照明裝置
本發明係關於包括半導體發光二極體之照明裝置。
諸如發光二極體(LED)之半導體發光裝置係現在可得到之最有效率光源之一。當前受關注之製造可跨可見光譜操作之高亮度LED的材料系統包含III-V族半導體，特別係鎵、鋁、銦及氮的二元、三元及四元合金，亦稱為III族氮化物材料；及鎵、鋁、銦、砷及磷的二元、三元及四元合金。通常藉由金屬有機化學氣相沈積(MOCVD)、分子束磊晶法(MBE)或其他磊晶技術在藍寶石、碳化矽或III族氮化物基板上磊晶生長III族氮化物裝置且在砷化鎵上磊晶生長III族磷化物。通常，在該基板上沈積一n型區域，接著在該n型區域上沈積一發光區域或作用區域，接著在該作用區域上沈積一p區域。可顛倒該等層之順序使得該p型區域相鄰於該基板。
半導體發光裝置之一有希望的用途係用於普通照明及顯示器裝置(諸如液晶顯示器LCD)之背光。彩色或單色透射LCD普遍用於蜂巢式電話、個人數位助理、可攜式音樂播放器、膝上型電腦、桌上型監視器及電視應用。
圖5所示由LED提供光之一背光之一實例被描述於美國專利第7,052,152號中。LED 43之一陣列係放置於該背光45之後面板上。該背光45之背板48與側壁46係由高反射材料覆蓋。一彩色轉換磷光體層47係設置於背光45之一蓋板40上。LCD面板44係放置於背光45前。LCD面板44可為一習知LCD，其具有一第一偏光濾光片、用於跨該液晶層區域之所選區域形成一電場之一薄膜電晶體陣列、一液晶層、一RGB彩色濾光片陣列，及一第二偏光濾光片。該彩色濾光片陣列具有紅、綠及藍子像素。經常在LCD面板44與背光45之間使用額外膜，例如一亮度增強膜(BEF)或偏光恢復膜(DBEF)。
本發明之一目的係連同設置於一實心、透明波導管之下表面之一光源形成一裝置。根據本發明實施例之一裝置包括一波導管，該波導管通常由透明材料之一第一區段形成。一光源係設置為接近該波導管之一下表面。該光源包括一半導體發光二極體及設置於該半導體發光二極體與該波導管之間之透明材料之一第二區段。透明材料之該第二區段之側壁係反射性的。一待照明表面係設置為接近該波導管之一上表面。在一些實施例中，該波導管之一邊緣為彎曲的。
根據本發明實施例之照明裝置可薄於習知裝置，具有充分的照明、混合及均勻性。
圖5所示由背板48、側壁46及蓋板40形成之波導管必須為厚，以使入射在LCD 44上的光被充分混合且為均勻。代替圖5所示之一敞開、箱狀的波導管，在本發明實施例中使用一實心波導管。將光源定位為鄰近於該波導管之一下表面。根據本發明實施例之照明裝置可薄於圖5所示之裝置。
圖1闡釋說明根據本發明實施例之一照明裝置。數個光源8係耦合至波導管6之下表面。例如，波導管6可為混合由數個光源提供之光之透明材料之一區段。例如，波導管6可為丙烯酸(例如，PMMA)、硬聚矽氧、模製塑膠、聚碳酸酯或任何其他合適材料。將來自波導管6之光引導朝向一待照明表面。雖然以下實施例使用一液晶顯示器(LCD)面板4之實例作為待照明表面，但是本發明不限於LCD顯示器。待照明表面可為任何表面，在一普通照明應用下，包括一簡單透明蓋。
待照明表面可為一習知LCD 4，其具有一第一偏光濾光片、用於跨該液晶層之所選區域形成一電場之一薄膜電晶體陣列、一液晶層、一RGB彩色濾光片陣列，及一第二偏光濾光片。該彩色濾光片陣列具有紅、綠及藍子像素。可在LCD面板4與波導管6之間使用額外已熟知的薄膜，諸如一亮度增強膜或偏光恢復膜及一漫射元件以改良均勻性。
圖2圖解說明耦合至波導管6之一下表面之一光源8之一第一實例。一半導體LED(諸如一發射藍色或UV的III族氮化物LED 12)係由互連件14而連接至一底座10。例如，LED 12可為一薄膜覆晶裝置。
一薄膜覆晶III族氮化物裝置可藉由首先在一生長基板(諸如藍寶石、SiC、GaN)上生長一n型區域、一發光區域或作用區域及一p型區域而形成。該p型區域及該發光區域之部分被蝕刻以曝露該下伏的n型區域之部分。然後在該所曝露的n型區域或p型區域上形成可反射之金屬電極(例如銀、鋁或一合金)。當該二極體係經正向加偏壓時，該發光區域以由III族氮化物作用層之組成所決定之波長發射光。形成此等LED係為吾人所熟知。
然後於一底座10上安裝該半導體LED 12作為一覆晶。底座10可為任意合適材料，諸如(例如)陶瓷、鋁或矽。底座10包括經由互連件(其可為金或焊料)焊接至或超音波熔接至半導體結構上之金屬電極之金屬電極。若該等電極本身可(例如)藉由一超音波熔接或任意其他合適接合處)連接，則互連可省略。介於該等半導體層12與底座10之間之多個金屬層(包括該半導體上之電極、該底座上之電極及互連件)在圖2中係顯示為結構14。底座10充當一機械支撐體，提供LED晶片上之n電極與p電極之間之一電介面、一電源供應器並提供散熱。合適的底座係為吾人所熟知。
為了減少該LED之厚度且為了防止光被生長基板所吸收，藉由適於該基板之一方法，諸如蝕刻、化學機械研磨或雷射熔解(其中一雷射加熱該III族氮化物結構與生長基板之該介面，熔解該III族氮化物結構之一部分且從該半導體結構釋放該基板)移除該生長基板。在一實施例中，在將一LED陣列安裝於一底座晶圓上之後且在單一化該等LED/底座(例如，藉由鋸切)之前執行該生長基板之移除。
在移除生長基板後，在一些實施例中，例如，用一光子晶體薄化及/或粗糙化或圖案化剩餘III族氮化物結構。例如，該光子晶體可被設計為將發射最大化至相對於該裝置之一上表面之一法線之大角度。在一些實施例中，該光子晶體係經組態使得大於50%的能量以相對於該裝置之一上表面之一法線之大於45°的角度發射。該裝置可以一囊封材料覆蓋。在一些實施例中，該生長基板仍為該裝置之一部分。該生長基板可塗覆有一反射塗層，使得大部分光以相對於該裝置之一上表面之一法線之大角度發射。可在該半導體結構上形成一波長轉換材料(諸如一或多個磷光體)。
一空腔20將LED 12與波導管6分開。相鄰於LED 12之該空腔之側面18及底部16係反射性的。該空腔20可由諸如聚矽氧之透明材料填充。一個二向色濾光片層22係設置於波導管6與空腔20之間。該二向色濾光片層22可經組態使得由該LED 12以小角度發射之藍光(諸如光24)被反射，而由該LED 12以大角度發射之藍光(諸如光26)被透射。合適的二向色濾光片已被吾人所熟知且可購自(例如)Ocean Optics，道格拉斯街830號，達尼丁，FL 34698。
圖2所示之裝置可藉由首先形成安裝於底座10上之該薄膜覆晶LED 12而形成。然後形成空腔20之該等反射側壁18及反射底部16。例如，一反射材料，舉例而言諸如TiO2可位設置於舉例而言諸如聚矽氧之一可模製材料中，然後模製於底座10上以形成該等反射側壁18及反射底部16。或者，側壁18及底部16可由一剛性材料預先製造，若該剛性材料本身不具反射性，則側壁18及底部16用一反射材料塗覆，然後定位於底座10上。然後空腔20以一透明材料填充。然後在空腔20中之該透明材料上塗覆二向色濾光片層22。
圖3圖解說明耦合至波導管6之一下表面之一光源8之一第二實例。如上文所述，半導體LED 12可為藉由互連件14而連接至一底座10之一III族氮化物薄膜覆晶。正如在圖2之該裝置中，一空腔係由反射側壁18形成。不為LED 12所佔用之該空腔之底部16之一部分係製成反射性的。諸如玻璃之一實心透明材料30佔用由反射側壁18及反射底部16形成之該空腔。如上文所述，反射光24及透射光26之一個二向色濾光片層22係設置在透明材料30之上。
如上文所述，圖3所示之該裝置可藉由首先形成安裝於底座10上之該薄膜覆晶LED 12而形成。個別地，在形成二向色濾光片層22之前或之後，用切割成所要大小之二向色濾光片層22塗覆諸如一玻璃板之一透明材料30。透明材料30係(例如)藉由以透明環氧樹脂或聚矽氧膠黏而附著至LED 12。然後反射側壁18及反射底部16係藉由(例如)以諸如銀或鋁之一反射金屬、反射塗料、一反射塗層或設置於舉例而言諸如聚矽氧之黏合劑上之諸如TiO2之一反射材料塗覆透明材料30之側面及底部而形成。在透明材料30附著至LED 12之前，透明材料30之側面可以一反射材料塗覆。可利用一真空將一黏合劑中之反射材料汲取至透明材料30與底座10之間之空間中，或該黏合劑可經選擇以在透明材料30下傳送，以形成反射底部16。在一些實施例中，底座10係反射性的。
在一些實施例中，在圖2與圖3所示之裝置中，LED 12在所示之尺寸上可具有數百微米至1毫米或2毫米之一橫向範圍。以透明材料填充之該空間在所示之尺寸上可具有為例如LED 12之橫向範圍的1.1倍至2倍之一橫向範圍且具有為例如LED 12之橫向範圍的0.5倍至1.5倍之一高度。在一實例中，LED 12係1毫米長，底座10係2毫米長且透明材料30係1.5毫米長且係1毫米高。
在一些實施例中，波導管6之邊緣6A係經塑形以引導光朝向下伏於待照明表面之該波導管之區域，如圖4所示，圖4為該波導管之一部分之一俯視圖。正方形8圖解說明光源位置，該等光源可為圖2與圖3所示之光源。邊緣6A包括多個彎曲部分，該等彎曲部分可塗覆有一反射材料或該等彎曲部分可經塑形以引起由光源8發射朝向邊緣6A之光之全內反射。如圖4所示，該邊緣6A可為扇狀或可具有其他形狀。引導光朝向該顯示器之作用觀看區域50。塑形波導管6之該邊緣，可藉由將入射在該波導管邊緣上之光引導遠離該等LED而非引導回到該等LED而減少被LED吸收之光損失量。塑形波導管6之該邊緣亦可改良在該作用觀看區域50之光之均勻性，可減少一給定顯示器效能所需的LED數量，且可減小溝緣高度52，其為該波導管邊緣與該作用觀看區域50之間之距離。
光源8可以跨波導管6底部之偶數間隔定位，僅接近波導管6之邊緣，或以任何其他組態定位。在一些實施例中，有些光源發射藍光，有些發射綠光且有些發射紅光。該紅光、綠光及藍光於波導管6中組合以形成白光。在一些實施例中，各光源(例如)藉由波長轉換一發射藍光的LED所發射的一些光使得該經波長轉換的光與該藍光組合以形成白光而發射白光。例如，一發射黃光的磷光體可與一發射藍光的LED組合以形成白光，或一發射紅光的磷光體及一發射綠光的磷光體可與一發射藍光的LED組合以形成白光。發射其他色彩光之額外磷光體或其他波長-轉換材料可被添加以達成一所需彩色點。該等磷光體可直接設置於圖2與圖3之LED 12上，或設置於二向色濾光片層22與透明材料20或30之間，或設置於二向色濾光片層22與波導管6之間。在一些實施例中，一或多個遠端磷光體可設置於顯示器之該作用觀看區域50中之波導管6之上，如圖4所示。
在如上文所述之一照明系統(其中光係由數個光源提供)中，可藉由設計是否提供光的充分照明、混合及均勻性量測效能。與未併入該等實施例之特徵之照明系統相比，本發明之實施例可以較少光源提供充分照明、混合及均勻性。在一些應用中，諸如用於顯示器之背光，最小化照明系統之該厚度係可取的。與未併入該等實施例之特徵之照明系統相比，本發明之實施例可在一較薄照明系統中提供相同效能。
已詳細描述本發明，熟悉此項技術者將瞭解，在本揭示內容之情況下，可在不背離本文所述之本發明觀念之精神下對本發明作修改。因此，不希望本發明之範疇限於所示及所描述之特定實施例。
4．．．液晶顯示器面板
6．．．波導管
6A．．．波導管6之邊緣
8．．．光源
10．．．底座
12．．．發光二極體(LED)
14．．．互連件
16．．．空腔之底部
18．．．空腔之側壁
20．．．空腔
22．．．二向色濾光片層
24．．．光
26．．．光
30．．．透明材料
40．．．蓋板
43．．．發光二極體(LED)
44．．．液晶顯示器(LCD)面板
45．．．背光
46．．．背光45之側壁
47．．．彩色轉換磷光體
48．．．背光45之背板
50．．．作用觀看區域
52．．．溝緣高度
圖1圖解說明根據本發明之實施例之一照明系統；
圖2及圖3圖解說明連接至波導管底部之半導體發光裝置；
圖4係一波導管之一部分之一俯視圖；及
圖5係一背光及一LCD之一橫截面視圖。
6．．．波導管
8．．．光源
10．．．底座
12．．．發光二極體(LED)
14．．．互連件
16．．．空腔之底部
18．．．空腔之側壁
20．．．空腔
22．．．二向色濾光片層
24．．．光
26．．．光

Claims (14)

  1. 一種照明裝置，其包括：一波導管(waveguide)，其包括透明材料之一第一區段；一光源，其係設置為接近該波導管之一下表面，該光源包括：一基底單元(base element)，至少一個半導體發光二極體位於該基底單元上；側壁，其自該基底單元延伸至該波導管及形成一空腔(cavity)於該半導體發光二極體與該波導管之間；及設置於該空腔中之透明材料之一第二區段；其中該等側壁係反射性的；及一待照明表面接近該波導管之一上表面。
  2. 如請求項1之照明裝置，其中一反射材料係設置於透明材料之該第二區段之該等側壁上。
  3. 如請求項2之照明裝置，其中該反射材料包括設置於一透明黏合劑材料中之TiO2。
  4. 如請求項1之照明裝置，其中該半導體發光二極體係與透明材料之該第二區段底部之一第一部分對準；及相鄰於該第一部分的透明材料之該第二區段底部之一第二部分係反射性的。
  5. 如請求項4之照明裝置，其中一反射材料係設置於透明材料之該第二區段底部之該第二部分。
  6. 如請求項1之照明裝置，其中透明材料之該第二區段係玻璃及聚矽氧之一者。
  7. 如請求項1之照明裝置，其中該波導管之一邊緣係經塑形以引導光朝向下伏於該待照明表面之該波導管之一部分。
  8. 如請求項1之照明裝置，其中該波導管之一邊緣係彎曲的。
  9. 如請求項1之照明裝置，其中該波導管之一邊緣係經塑形以引起入射於該邊緣上之光的全內反射。
  10. 如請求項1之照明裝置，其進一步包括設置於該波導管與透明材料之該第二區段之間之一個二向色濾光片。
  11. 如請求項1之照明裝置，其進一步包括設置於該待照明表面與該半導體發光二極體之間之一波長轉換材料。
  12. 如請求項1之照明裝置，其中透明材料之該第二區段具有大於該半導體發光二極體之一長度之一長度。
  13. 如請求項1之照明裝置，其中該半導體發光二極體包括一光子晶體，該光子晶體係經組態使得由該半導體發光二極體發射的大於50%的能量係以相對於該半導體發光二極體之一上表面之一法線之大於45°的角度發射。
  14. 如請求項1之照明裝置，其中該半導體發光二極體包括：一藍寶石生長基板；及一反射塗層，其係設置於該藍寶石生長基板上。
TW099123013A 2009-07-16 2010-07-13 包含定位於接近波導管下表面的光源之照明裝置 TWI537526B (zh)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12/503,915 US9322973B2 (en) 2009-07-16 2009-07-16 Lighting device with light sources positioned near the bottom surface of a waveguide

Publications (2)

Publication Number Publication Date
TW201113475A TW201113475A (en) 2011-04-16
TWI537526B true TWI537526B (zh) 2016-06-11

Family

ID=42985385

Family Applications (1)

Application Number Title Priority Date Filing Date
TW099123013A TWI537526B (zh) 2009-07-16 2010-07-13 包含定位於接近波導管下表面的光源之照明裝置

Country Status (7)

Country Link
US (2) US9322973B2 (zh)
EP (1) EP2454621B1 (zh)
JP (2) JP5965839B2 (zh)
KR (2) KR101719580B1 (zh)
CN (1) CN102472863B (zh)
TW (1) TWI537526B (zh)
WO (1) WO2011007277A2 (zh)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101780420B1 (ko) 2011-03-24 2017-09-22 삼성디스플레이 주식회사 백라이트 유닛 및 이를 구비하는 입체 영상 표시 장치
TWI461799B (zh) * 2011-12-23 2014-11-21 Wistron Corp 具有可撓式顯示面板的電子裝置及背光模組
KR102172934B1 (ko) * 2013-07-22 2020-11-03 루미리즈 홀딩 비.브이. 플립-칩 측면 방출 led
USD877147S1 (en) 2014-07-04 2020-03-03 Sakai Display Products Corporation Image display
USD873822S1 (en) 2014-07-04 2020-01-28 Sakai Display Products Corporation Image display
USD838253S1 (en) 2014-07-04 2019-01-15 Sakai Display Products Corporation Image display
CN106169530A (zh) * 2016-08-29 2016-11-30 广东德力光电有限公司 一种带侧壁反射层的led芯片结构
KR102018912B1 (ko) * 2017-12-29 2019-09-05 주식회사 디엠엘이디 식물 공장의 식물성장용 인공 광원 장치의 패키지 구조
WO2019151826A1 (ko) * 2018-02-05 2019-08-08 엘지이노텍 주식회사 반도체 소자 패키지 및 이를 포함하는 발광장치
USD995885S1 (en) 2020-01-28 2023-08-15 Lucifer Lighting Company Waveguide for multi-zone illumination light fixtures
US11163100B2 (en) * 2020-01-28 2021-11-02 Lucifer Lighting Company Light fixtures having waveguides and related methods
WO2023101852A1 (en) * 2021-12-02 2023-06-08 Lumileds Llc Projecting a static light pattern

Family Cites Families (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10212199A (ja) * 1997-01-30 1998-08-11 Kyocera Corp 結晶成長用基板及びそれを用いた発光装置
DE10033502A1 (de) * 2000-07-10 2002-01-31 Osram Opto Semiconductors Gmbh Optoelektronisches Modul, Verfahren zu dessen Herstellung und dessen Verwendung
ATE525755T1 (de) 2001-10-12 2011-10-15 Nichia Corp Lichtemittierendes bauelement und verfahren zu seiner herstellung
KR101030068B1 (ko) 2002-07-08 2011-04-19 니치아 카가쿠 고교 가부시키가이샤 질화물 반도체 소자의 제조방법 및 질화물 반도체 소자
WO2004055774A1 (en) 2002-12-18 2004-07-01 Koninklijke Philips Electronics N.V. Scrolling backlight device for lcd display panel
US7854535B2 (en) * 2003-09-23 2010-12-21 Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. Ceramic packaging for high brightness LED devices
US7052152B2 (en) 2003-10-03 2006-05-30 Philips Lumileds Lighting Company, Llc LCD backlight using two-dimensional array LEDs
US7488432B2 (en) * 2003-10-28 2009-02-10 Nichia Corporation Fluorescent material and light-emitting device
JP2005157025A (ja) * 2003-11-27 2005-06-16 Rohm Co Ltd 液晶表示装置
US20070267646A1 (en) * 2004-06-03 2007-11-22 Philips Lumileds Lighting Company, Llc Light Emitting Device Including a Photonic Crystal and a Luminescent Ceramic
KR20050121076A (ko) 2004-06-21 2005-12-26 삼성전자주식회사 백라이트 어셈블리 및 이를 이용한 표시장치
US7631991B2 (en) 2004-09-30 2009-12-15 Koninklijke Philips Electronics N.V. Brightness enhancement of LED using selective ray angular recycling
US7352011B2 (en) * 2004-11-15 2008-04-01 Philips Lumileds Lighting Company, Llc Wide emitting lens for LED useful for backlighting
KR101093324B1 (ko) 2005-05-30 2011-12-14 엘지이노텍 주식회사 발광 다이오드를 구비한 백라이트 유닛
US7322731B2 (en) * 2005-06-24 2008-01-29 3M Innovative Properties Company Color mixing illumination light unit and system using same
US20070001185A1 (en) * 2005-06-29 2007-01-04 Lu Ying T LED backlight module
JP2007036044A (ja) * 2005-07-28 2007-02-08 Mitsubishi Rayon Co Ltd 面光源装置
WO2007037093A1 (ja) 2005-09-29 2007-04-05 Idemitsu Kosan Co., Ltd. 反射材及び発光ダイオード用反射体
WO2007064002A1 (en) 2005-11-30 2007-06-07 Showa Denko K.K. Light guide member, planar light source device provided with the light guide member, and display apparatus using the planar light source device
JP4541346B2 (ja) 2005-11-30 2010-09-08 昭和電工株式会社 面光源装置
JP4828253B2 (ja) 2006-02-23 2011-11-30 昭和電工株式会社 液晶用バックライトの光源として用いられる発光ユニット
EP2035870A2 (en) 2006-06-22 2009-03-18 Koninklijke Philips Electronics N.V. Symmetrical light guide structure for led based ambilight
US7663152B2 (en) * 2006-08-09 2010-02-16 Philips Lumileds Lighting Company, Llc Illumination device including wavelength converting element side holding heat sink
JP5119379B2 (ja) 2007-06-01 2013-01-16 株式会社オプトデザイン 面照明光源装置及び面照明装置
JP2010537364A (ja) * 2007-08-16 2010-12-02 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 照明アセンブリ
JP5628475B2 (ja) 2008-07-22 2014-11-19 日亜化学工業株式会社 表面実装型発光装置の製造方法
JP2009043738A (ja) 2008-10-30 2009-02-26 Citizen Electronics Co Ltd 面状光源装置

Also Published As

Publication number Publication date
KR101719580B1 (ko) 2017-03-24
KR101898828B1 (ko) 2018-09-13
JP6481946B2 (ja) 2019-03-13
EP2454621B1 (en) 2023-05-03
WO2011007277A3 (en) 2011-03-31
WO2011007277A2 (en) 2011-01-20
EP2454621A2 (en) 2012-05-23
JP2016136649A (ja) 2016-07-28
JP5965839B2 (ja) 2016-08-10
US20160161668A1 (en) 2016-06-09
KR20170034927A (ko) 2017-03-29
TW201113475A (en) 2011-04-16
JP2012533840A (ja) 2012-12-27
CN102472863A (zh) 2012-05-23
KR20120052321A (ko) 2012-05-23
CN102472863B (zh) 2015-09-09
US20110012148A1 (en) 2011-01-20
US9322973B2 (en) 2016-04-26
US10025026B2 (en) 2018-07-17

Similar Documents

Publication Publication Date Title
TWI537526B (zh) 包含定位於接近波導管下表面的光源之照明裝置
TWI482307B (zh) 照明結構
JP6620120B2 (ja) 半導体発光素子を含むバックライト
US8104907B2 (en) Remote wavelength converting material configuration for lighting
TWI460882B (zh) 在具承載基板之發光二極體上的透明歐姆接點
US20110097833A1 (en) Light source including a wavelenght-convereted semiconductor light emitting device and a filter
KR101613246B1 (ko) Led 면광원 및 그 제조방법
JP6661964B2 (ja) 発光装置
KR20150025437A (ko) 광원 모듈 및 이를 구비한 백라이트 유닛
KR101888603B1 (ko) 발광 소자 패키지 및 표시장치
KR20120134326A (ko) 발광 소자 및 발광 소자 패키지