CN105276445A - 背光装置 - Google Patents

背光装置 Download PDF

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Publication number
CN105276445A
CN105276445A CN201510362249.1A CN201510362249A CN105276445A CN 105276445 A CN105276445 A CN 105276445A CN 201510362249 A CN201510362249 A CN 201510362249A CN 105276445 A CN105276445 A CN 105276445A
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CN
China
Prior art keywords
lighting device
light emitting
back lighting
backboard
emitting diode
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Pending
Application number
CN201510362249.1A
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English (en)
Inventor
李政道
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Individual
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Individual
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Publication of CN105276445A publication Critical patent/CN105276445A/zh
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • 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
    • G02B6/0081—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
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • 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
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • 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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/001—Arrangement of electric circuit elements in or on lighting devices the elements being electrical wires or cables
    • F21V23/002—Arrangements of cables or conductors inside a lighting device, e.g. means for guiding along parts of the housing or in a pivoting arm
    • 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
    • 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
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • 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
    • 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
    • G02B6/0083—Details of electrical connections of light sources to drivers, circuit boards, or the like
    • 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
    • G02B6/0085—Means for removing heat created by the light source from the package
    • 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
    • G02B6/009—Positioning aspects of the light source in the package
    • 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
    • G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/15—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components having potential barriers, specially adapted for light emission
    • H01L27/153—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components having potential barriers, specially adapted for light emission in a repetitive configuration, e.g. LED bars
    • H01L27/156—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components having potential barriers, specially adapted for light emission in a repetitive configuration, e.g. LED bars two-dimensional arrays
    • 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
    • H01L33/64—Heat extraction or cooling elements
    • H01L33/647—Heat extraction or cooling elements the elements conducting electric current to or from the semiconductor body
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0284—Details of three-dimensional rigid printed circuit boards
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/03—Use of materials for the substrate
    • H05K1/05—Insulated conductive substrates, e.g. insulated metal substrate
    • 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
    • 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
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • 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
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    • G02F1/133612—Electrical details
    • 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
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    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
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    • 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
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    • 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
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    • H—ELECTRICITY
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    • H05K1/00—Printed circuits
    • H05K1/02—Details
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    • H—ELECTRICITY
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    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
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    • H05K2201/09909—Special local insulating pattern, e.g. as dam around component
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
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    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
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    • H05K2201/10007—Types of components
    • H05K2201/10106—Light emitting diode [LED]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10128—Display
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/20—Details of printed circuits not provided for in H05K2201/01 - H05K2201/10
    • H05K2201/2054—Light-reflecting surface, e.g. conductors, substrates, coatings, dielectrics
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
    • H05K2203/30—Details of processes not otherwise provided for in H05K2203/01 - H05K2203/17
    • H05K2203/302—Bending a rigid substrate; Breaking rigid substrates by bending

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Nonlinear Science (AREA)
  • Computer Hardware Design (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
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Abstract

一种背光装置，用以解决目前背光装置难以轻薄化的问题。本发明的背光装置包含：一个背板，该背板具有一个第一部及一个第二部，该第二部连接在该第一部的外周，该第一部及该第二部共同形成一个混光腔，一个绝缘层形成于该第一部位在该混光腔中的一个表面上，或形成于该第二部位在该混光腔中的一个表面上；一个发光模块，该发光模块具有至少一个导电电路及发光二极管，该发光二极管电连接于该导电电路，该导电电路成型于该绝缘层上；及一个光学模块，该光学模块结合于该背板并位于该混光腔的顶部。

Description

背光装置
技术领域
本发明是有关于一种显示器用的背光装置，尤指一种可以增加导热速度、轻量化、薄型化、减少组装工时的背光装置。
背景技术
近年來，发光二极管（light-emittingdiode,LED）等小型化、高亮度的光源，被大量的使用在各种背光装置的应用上；小至手机屏幕，大至大尺寸电视屏幕等。
早期常见的背光装置多采用「侧入式」背光模块，而随着对大尺寸电视屏幕的需求增加，目前已另发展出「直下式」背光模块，以提升大尺寸的屏幕所呈现的画质。
请参照图1，其是一种使用直下式背光模块的现有的背光装置9，该现有的背光装置9具有一背板91，该背板91具有一水平的底部911及一倾斜的侧壁部912，该侧壁部912连接在该底部911的外周，以共同形成一混光腔913。
该现有的背光装置9另于该混光腔913中设有数个直下式发光模块92；即，请参照图2，各该直下式发光模块92是将数个发光二极管921以排列的方式黏固在条状的电路板922上，再将该数条电路板922结合在该背板91的底部911内侧表面。
请再参照图1，该现有的背光装置9在该混光腔913中铺设一反射层93，及于该混光腔913的顶部设有单层或多层的光学膜94，该光学膜94二侧分别设有一支撑部95，再以一外框96封装在该光学膜94上，及搭配一液晶面板（未绘示）设于该外框96上，以由该现有的背光装置9作为该液晶面板的背光源。
据此，该数个发光二极管921可以排列在该液晶面板的背侧，故该数个发光二极管921运作时，其光线可于该混光腔913混光后，投射于该液晶面板，令该液晶面板上的各处皆获得均匀的光线，以提升所呈现的画质。类似于该现有的背光装置9的一实施例已揭露于中国台湾公告第M479438号《用于LEDTV的背光模块》、公告第I422783号《直下式发光二极管光源》、公告第M371308号《发光二极管模块》及美国公告第7588362号《BACKLIGHTASSEMBLY,DISPLAYDEVICEPROVIDEDWITHTHESAME,ANDMETHODFORASSEMBLINGBACKLIGHTASSEMBLY》等专利案当中。
其中，发光二极管921的使用寿命与其工作温度有关，过高的工作温度将导致发光二极管921的使用寿命迅速衰减；因此，发光二极管921运作时所产生的热能须尽速地传导至电路板922，再通过电路板922传导至该背板91以排除热能，使发光二极管921能维持适当工作温度。然而，由于电路板922的厚度一般约有0.8～3mm，且电路板922本身材质的导热性相当差，故通过电路板922传导至该背板91的热传导效率也必然相当不好。
又，为确保电路板922与背板91之间能紧密相连，避免空隙中的空气严重妨害导热效果，该现有的背光装置9将发光二极管921粘固至电路板922后，需再选择利用螺丝、背胶、或卡扣等固接机构，将电路板922紧密地固接结合在背板91。但是，不论使用螺丝、背胶、或卡扣等固接机构，都必须以相当密集的方式來固接，令该些固接机构的使用數量相当可观，不仅材料成本高、组装耗时长，再加上电路板922本身的重量与厚度，使得该现有的背光装置9难以轻量、薄型化。再者，为供结合该些固接机构，电路板922上须预留固接的孔位或定位结构，而背板91则须在相对位置上预留配合的卡扣或锁付孔等结构，也额外增加电路板922与背板91的制作成本。
有鉴于此，现有的背光装置确实仍有加以改善的必要。
发明内容
本发明提供一种背光装置，可供发光模块的导电电路直接成型在背板的绝缘层上，使得设于该导电电路上的发光二极管运作时所产生的热能，能高效率地传导至该背板，以大幅提升发光二极管的散热效率，并有效减小该背光装置的整体重量与厚度。
本发明的背光装置，包含：一背板，该背板具有一第一部及一第二部，该第二部连接在该第一部的外周，该第一部及该第二部共同形成一混光腔，一绝缘层形成于该第一部位在该混光腔中的一表面上，或形成于该第二部位在该混光腔中的一表面上；一发光模块，该发光模块具有至少一导电电路及发光二极管，该发光二极管电连接于该导电电路，该导电电路成型于该绝缘层上；及一光学模块，该光学模块结合于该背板并位于该混光腔的顶部。
其中，该绝缘层设于该第一部，以构成「直下式」背光装置。
其中，该第一部可以呈非平面的型态，例如呈曲面型态。
其中，该第二部可以延伸超过该第一部的外侧周缘。
其中，该背板在位于该混光腔中的至少一表面可以设有一反射层，该发光二极管凸伸穿出该反射层。
其中，该绝缘层设于该第二部，该混光腔中设有一导光板，且该导光板位于该发光二极管的发光侧，以构成「侧入式」背光装置。
其中，该发光模块具有至少一功能性电子零件，该功能性电子零件电连接于该导电电路。例如，该功能性电子零件可以为用以驱动该发光二极管的电子电路元件。
其中，该背板的第一部与第二部可以分别制造再予以组装接合。
其中，该第一部与该第二部的材质不同。
其中，该第一部嵌合于该第二部中。
据此，本发明的背光装置可供发光模块的导电电路直接成型在背板的绝缘层上，而绝缘层的厚度一般约为40～150μm，远小于电路板0.8～3mm的厚度，故可大幅降低通过绝缘层传导至该背板的热传导阻抗，使得设于该导电电路上的发光二极管运作时所产生的热能，能高效率地传导至该背板，以大幅提升发光二极管的散热效率，不仅可延长发光二极管的使用寿命，更能让发光二极管即使以更高的功率运作，也不担心工作温度过高。此外，由于本发明的背光装置不须设置电路板及如螺丝、背胶、或卡扣等固接机构，故能有效降低该背光装置的材料成本，提升组装效率，并使该背光装置得以明显地轻量、薄型化。
附图说明
图1：一种现有的背光装置的侧剖结构示意图。
图2：一种现有的背光装置局部俯视结构示意图。
图3：本发明第一实施例的侧剖结构示意图。
图4：本发明第一实施例的局部立体结构示意图。
图5：本发明第一实施例的背板呈曲面型态的侧视结构示意图。
图6：本发明第一实施例使用另一型态背板的侧视结构示意图。
图7：本发明第一实施例使用组合式背板的侧视结构示意图。
图8：本发明第二实施例的立体分解结构示意图。
【符号说明】
﹝本发明﹞
1背板11第一部
12第二部13绝缘层
14反射层15导光板
2发光模块21导电电路
22发光二极管23功能性电子零件
3光学模块
S混光腔
﹝现有﹞
9背光装置91背板
911底部912侧壁部
913混光腔92直下式发光模块
921发光二极管922电路板
93反射层94光学膜
95支撑部96外框。
具体实施方式
为让本发明的上述及其他目的、特征及优点能更明显易懂，下文特举本发明的较佳实施例，并配合所附图式，作详细说明如下：
请参照图3，其是本发明背光装置的第一实施例，该背光装置大致上包含一背板1、一发光模块2及一光学模块3，该发光模块2及该光学模块3均结合于该背板1。
请参照图3、4，该背板1具有一第一部11及一第二部12，该第二部12连接在该第一部11的外周，使该背板1形成立体的结构体，并具有一定的结构强度而不易变形。其中，可选择使该第一部11及该第二部12先呈共平面地相连，将该发光模块2结合至该背板1的后，再使该第二部12相对于该第一部11拗折，令该背板1形成立体的结构体；或者，该第一部11及该第二部12也可以直接呈非共平面地相连，以形成立体结构体的该背板1供该发光模块2结合。
该第一部11可选择呈平面型态（如图3所示），或是呈非平面的型态，例如图5所示的曲面型态，或是多平面之间倾斜相连的型态。该第二部12的型态则不加以限制，例如可以是垂直于该第一部11的环墙，或是倾斜状的环墙，或者该第二部12也可以延伸超过该第一部11的外侧周缘（如图6所示），使该背板1的背侧可保持形成一散热空间。
又，该第一部11及该第二部12可以一体相连，或是由不同构件组合而成；该第一部11及该第二部12的材质也可相同或不同。举例而言，请参照图7，其揭示组合式的背板1；也即，该背板1的第一部11及第二部12可以分别制造再予以组装接合，甚至该第一部11或该第二部12都还可再细分成数个部位并分别制造，而该背板1各部位的接合方式不限，可例如是锁接、粘接或焊接等。组合式背板1的优点在于，该背板1的各部位体积较小，相较于一体成型式的背板1，组合式的背板1可大幅降低模具成本。另一方面，组合式的背板1还可以依据各部位的需求而选择适当的材质，例如，该第一部11可以选择散热性较佳的铝材，该第二部12则可选择结构强度较佳的钢材或轻质的塑胶材等。又，在图7所示的实施例中，该第一部11嵌合于该第二部12中，无论该第一部11与该第二部12的材质是否相同，都可更进一步地提升该第一部11与该第二部12之间的结合稳固性。
另，请再参照图3、4，该第一部11及该第二部12共同形成一混光腔S，一绝缘层13形成于该第一部11位于该混光腔S中的一表面上，或形成于该第二部位12于该混光腔S中的一表面上。该背板1若为可导电的材质，该绝缘层13可例如是涂布在该背板1表面上的绝缘介质；其中，可选择使该绝缘层13的分布范围配合所需设置的导电电路21型态设置，而非在该第一部11或该第二部12的表面上设置整片的绝缘层13；据此，仅沿着该导电电路21的型态设有对应型态的该绝缘层13，可大幅减少该绝缘层13的使用量，有助降低制造成本。该背板1若为不可导电的材质，该绝缘层13则不必额外设置，为本领域中具有通常知识者可以理解。又，该背板1还可以在位于该混光腔S中的至少一表面设有一反射层14，该反射层14可选择贴接或涂布在该绝缘层13上。
该发光模块2包含至少一导电电路21及发光二极管22，该发光二极管22电连接于该导电电路21，该导电电路21成型于该绝缘层13上，该发光二极管22凸伸穿出该反射层14。此外，该发光模块2可另包含至少一功能性电子零件23，该功能性电子零件23电连接于该导电电路21，该功能性电子零件23可例如是用以驱动发光二极管22运作的电子电路元件等。
该光学模块3具有转变光特性的功能，主要用以将该发光模块2于混光腔S进行混光后所产生的光线，转变为符合该背光装置所需要的配光，或产生均光的效果；该光学模块3的细部结构与原理为本领域中具有通常知识者可以理解，且非属本发明的重点，故于此不再加以详述。在本实施例中，该光学模块3可例如由一外框（图未绘示）压掣结合于该背板1，并使该光学模块3位于该混光腔S的顶部。
据由前述结构，本发明的背光装置可借助在背板1的绝缘层13上成型发光模块2的导电电路21，而绝缘层13的厚度一般约为40～150μm，远小于现有的背光装置所使用的电路板922（标示于图1中）厚度，故可大幅降低通过绝缘层传导至该背板的热传导阻抗，使得设于该导电电路21上的发光二极管22运作时所产生的热能可迅速传导至该背板1以快速散热，进而大幅提升发光二极管22的散热效率。如此一来，不仅可延长发光二极管22的使用寿命，更能让发光二极管22即使以更高的功率运作，也不必担心工作温度过高。
此外，由于本发明的背光装置不须设置电路板及如螺丝、背胶、或卡扣等固接机构，故能有效降低该背光装置的材料成本，提升组装效率，并有效减小该背光装置的整体重量与厚度，使该背光装置得以明显地轻量、薄型化。再者，本发明背光装置的背板1也不须再为了结合该些固接机构而预留卡扣或锁付孔等结构，故该背板1的制作成本也得以降低。
尤其，本实施例选择使该绝缘层13设于该第一部11，以搭配该发光模块2及该光学模块3构成「直下式」背光装置，特别适合应用于大尺寸的液晶面板背侧，且更能凸显本发明背光装置的优点。
具体而言，以同制成应用于32吋屏幕的背光装置为例，以本发明技术制成的背光装置，其混光腔S的长度约为709mm，宽度约为400mm，高度约为20mm，且背板1可使用板厚为0.8mm的钢板材质（密度约为7.8g/cm3），故该背板1的总重量约为2.11kg。相较的下，以现有技术制成的背光装置，其电路板若使用板厚为1mm的FR-4环氧玻璃布层压板（密度约为1.8g/cm3），并布满混光腔于背板第一部表面时，其电路板的重量约为0.51kg，故现有技术制成的背光装置，其背板加上电路板的总重量为2.62kg；是以，本发明技术制成的背光装置可节省约20%的重量。
再者，以现有技术制成的背光装置，其电路板需螺丝、背胶、或卡扣等固接机构，使得发光二极管彼此之间之间距很难小于30mm，因此其混光腔的高度也很难小于20mm；相较的下，以本发明技术制成的背光装置因为没有固接机构的限制，使数个发光二极管22之间距得以大幅缩减。举例而言，当二相邻发光二极管22之间距为15mm时，混光腔S的高度即可降低至14mm，可缩减混光腔S约30%的高度，同时还能维持良好的混光效果。
请参照图8，其是本发明背光装置的第二实施例，该第二实施例大致上同于上述的第一实施例，其主要差异在于：本实施例选择使该绝缘层13设于该第二部12，并另于该混光腔S中设一导光板15，以搭配该发光模块2及该光学模块3构成「侧入式」背光装置。
详而言之，由于本实施例的该绝缘层13位于该第二部12，而该导光板15位于该混光腔S中，且该导光板15位于发光二极管22的发光侧，该发光二极管22电连接于该导电电路21，且将该发光模块2的导电电路21设至该绝缘层13上，则该发光二极管22运作时所产生的光线可从侧端射入该导光板15，由该导光板15将光线均匀地导向该光学模块3。本实施例的背光装置较适合应用在如手机、平板或笔电等具有较小尺寸液晶面板的电子装置中。
综上所述，本发明的背光装置，可供发光模块的导电电路直接成型在背板的绝缘层上，故可大幅降低通过绝缘层传导至该背板的热传导阻抗，使得设于该导电电路上的发光二极管运作时所产生的热能，能高效率地传导至该背板，以大幅提升发光二极管的散热效率，延长发光二极管的使用寿命，同时降低该背光装置的材料成本、提升组装效率，并使该背光装置得以明显地轻量、薄型化。

Claims (10)

1.一种背光装置，其特征在于，其包含：
一个背板，该背板具有一个第一部及一个第二部，该第二部连接在该第一部的外周，该第一部及该第二部共同形成一个混光腔，一个绝缘层形成于该第一部位在该混光腔中的一个表面上，或形成于该第二部位在该混光腔中的一个表面上；
一个发光模块，该发光模块具有至少一个导电电路及发光二极管，该发光二极管电连接于该导电电路，该导电电路成型于该绝缘层上；及
一个光学模块，该光学模块结合于该背板并位于该混光腔的顶部。
2.如权利要求1所述的背光装置，其特征在于，该绝缘层设于该第一部。
3.如权利要求1所述的背光装置，其特征在于，该第一部呈非平面的型态。
4.如权利要求1所述的背光装置，其特征在于，该绝缘层设于该第二部，该混光腔中设有一个导光板，且该导光板位于该发光二极管的发光侧。
5.如权利要求1至4中任一所述的背光装置，其特征在于，该第二部延伸超过该第一部的外侧周缘。
6.如权利要求1至4中任一所述的背光装置，其特征在于，该背板在位于该混光腔中的至少一个表面设有一个反射层，该发光二极管凸伸穿出该反射层。
7.如权利要求1至4中任一所述的背光装置，其特征在于，该发光模块具有至少一个功能性电子零件，该功能性电子零件电连接于该导电电路。
8.如权利要求1至4中任一所述的背光装置，其特征在于，该背板的第一部与第二部是分别制造再予以组装接合。
9.如权利要求8所述的背光装置，其特征在于，该第一部与该第二部的材质不同。
10.如权利要求8所述的背光装置，其特征在于，该第一部嵌合于该第二部中。
CN201510362249.1A 2014-07-17 2015-06-26 背光装置 Pending CN105276445A (zh)

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