TWI539190B - Led導光元件、led光源模組及直下式led電視 - Google Patents

Led導光元件、led光源模組及直下式led電視 Download PDF

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TWI539190B
TWI539190B TW101135872A TW101135872A TWI539190B TW I539190 B TWI539190 B TW I539190B TW 101135872 A TW101135872 A TW 101135872A TW 101135872 A TW101135872 A TW 101135872A TW I539190 B TWI539190 B TW I539190B
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led
concave lens
light
led light
incident surface
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TW101135872A
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TW201413302A (zh
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林奕村
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鴻海精密工業股份有限公司
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Priority to US13/709,075 priority patent/US8922734B2/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G02B3/0037—Arrays characterized by the distribution or form of lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0009—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0006—Arrays
    • G02B3/0037—Arrays characterized by the distribution or form of lenses
    • G02B3/0062—Stacked lens arrays, i.e. refractive surfaces arranged in at least two planes, without structurally separate optical elements in-between
    • G02B3/0068—Stacked lens arrays, i.e. refractive surfaces arranged in at least two planes, without structurally separate optical elements in-between arranged in a single integral body or plate, e.g. laminates or hybrid structures with other optical elements
    • G—PHYSICS
    • 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
    • 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
    • G02F1/133504—Diffusing, scattering, diffracting 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
    • G02F1/133603—Direct backlight with LEDs
    • 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
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
    • 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
    • G02F2202/00—Materials and properties
    • G02F2202/02—Materials and properties organic material
    • G02F2202/022—Materials and properties organic material polymeric

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Planar Illumination Modules (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Led Device Packages (AREA)
  • Liquid Crystal (AREA)

Description

LED導光元件、LED光源模組及直下式LED電視
本發明涉及導光元件，尤其涉及LED導光元件，及使用該LED導光元件的LED光源模組及直下式LED電視。
發光二極體(LED)作為點光源已被廣泛使用。目前，LED的導光元件主要為一平面的擴散板，該擴散板內部具有微粒用於擴散光線。該擴散板常會有光線熱量過度集中而產生熱點(Hot Spot)的問題，因此，該擴散板需要與LED維持較大之距離。然而，隨著薄型化電子產品，例如薄型化LED電視的需求，上述擴散板與LED之距離難以進一步限縮。
有鑒於此，有必要提供一種能克服上述問題的LED導光元件，LED光源模組以及直下式LED電視。
一種LED導光元件，其包括一入光面及一相背的出光面，該入光面具有複數內凹透鏡面，該複數內凹透鏡面由該入光面的中心向外輻射擴散排列，該複數內凹透鏡面用於擴散一個LED發出之光線。該複數內凹透鏡面排列成複數同心圓，屬於同一同心圓任一直徑上相鄰內凹透鏡面之間的距離相等。
一種LED光源模組，其包括一LED模組及一LED導光元件。該LED模 組包括一電路板及一LED設置在該電路板上。該LED導光元件設置在該電路板上，其包括一入光面及一相背的出光面，該入光面具有複數內凹透鏡面，該複數內凹透鏡面由該入光面的中心向外輻射擴散排列，該複數內凹透鏡面用於擴散該LED發出之光線。該複數內凹透鏡面排列成複數同心圓，屬於同一同心圓任一直徑上相鄰內凹透鏡面之間的距離相等。
一種直下式LED電視，其包括一LED模組，一LED導光元件及一顯示面板。該LED模組包括一電路板及一LED設置在該電路板上。該LED導光元件設置在該電路板上，其包括一入光面及一相背的出光面，該入光面具有複數內凹透鏡面，該複數內凹透鏡面由該入光面的中心向外輻射擴散排列，該複數內凹透鏡面用於擴散一個LED發出之光線。該複數內凹透鏡面排列成複數同心圓，屬於同一同心圓任一直徑上相鄰內凹透鏡面之間的距離相等。該顯示面板設置在該LED導光元件上方並接收透過該LED導光元件的LED光線。
相對於先前技術，本發明提供之LED導光元件面對LED的入光面具有複數內凹透鏡面用於LED光線先進行擴散，從而可以減輕或消除熱點現象，該LED電視藉由該LED導光元件可以縮短該LED導光元件與LED之距離，從而可以薄型化。
100‧‧‧LED導光元件
200‧‧‧LED模組
300‧‧‧LED光源模組
400‧‧‧直下式LED電視
10‧‧‧入光面
20‧‧‧出光面
30‧‧‧支柱
12‧‧‧內凹透鏡面
201‧‧‧電路板
202‧‧‧LED
401‧‧‧顯示面板
圖1係本發明實施例提供之LED光源模組立體示意圖，該LED光源模組包括一LED導光元件。
圖2係圖1的LED導光元件的反面立體示意圖。
圖3係本發明實施例提供之直下式LED電視剖示圖。
下面將結合附圖，對本發明實施例作進一步之詳細說明。
請參閱圖1，本發明實施例提供之LED光源模組300包括一LED模組200及一LED導光元件100。該LED導光元件100包括一面對該LED模組200的入光面10及一相背的出光面20。
請一並參閱圖2，該入光面10具有複數內凹透鏡面12。每個該內凹透鏡面12可以為球面或非球面形狀。該複數內凹透鏡面12由該入光面的中心向外輻射擴散排列，並且排列成複數同心圓。兩個相鄰的該內凹透鏡面12之間的區域為平面。
本實施例中，該出光面20亦為平面，在其它實施例中，該出光面20可以分佈多個網點用於進一步擴散光線，使出光面20的光線均勻。
本實施例中，該入光面10及該出光面20均為圓形，在其它實施例中，該入光面10及該出光面20可為其它形狀，例如方形。
該LED導光元件100進一步包括複數支柱30自該入光面10一體成型延伸出。本實施例中，該複數支柱30為三個。該複數支柱30間隔該入光面10與該LED模組200，其長度可以根據該入光面10與該LED模組200的距離需要而調節。
該LED模組200包括一電路板201及一LED202設置在該電路板201上。該複數內凹透鏡面12可以對LED光線進行充分擴散，從而可以減輕或消除該入光面10的熱點現象。而由於該入光面10的熱點現象可以減輕或消除，該複數支柱30的長度可以適當地縮短。
請一並參閱圖3，本發明實施例提供之直下式LED電視400包括該LED光源模組300及一顯示面板401。該顯示面板401設置在該LED導光元件100上方並接收透過該LED導光元件100的LED光線。由於該LED導光元件100的入光面10的熱點現象可以減輕或消除，該LED導光元件100與該LED模組200之距離可以適當地縮小，因此該直下式LED電視400可以薄型化。
在直下式LED電視的其它實施例中，可以有多個LED設置在同一電路板上，同時上方排列多個該LED導光元件100，每個該LED導光元件100對應一個LED，用於對該LED的光線進行充分擴散。
綜上所述，本發明確已符合發明專利之要件，遂依法提出專利申請。惟，以上所述者僅為本發明之較佳實施方式，自不能以此限制本案之申請專利範圍。舉凡熟悉本案技藝之人士援依本發明之精神所作之等效修飾或變化，皆應涵蓋於以下申請專利範圍內。
100‧‧‧LED導光元件
10‧‧‧入光面
20‧‧‧出光面
30‧‧‧支柱
12‧‧‧內凹透鏡面

Claims (8)

  1. 一種LED導光元件，其包括一入光面及一相背的出光面，該入光面具有複數內凹透鏡面，該複數內凹透鏡面由該入光面的中心向外輻射擴散排列，該複數內凹透鏡面用於擴散一個LED發出之光線，該複數內凹透鏡面排列成複數同心圓，屬於同一同心圓任一直徑上相鄰內凹透鏡面之間的距離相等。
  2. 如請求項1所述之LED導光元件，其中：該出光面為平面。
  3. 如請求項1所述之LED導光元件，其中：兩個相鄰的該內凹透鏡面之間的區域為平面。
  4. 如請求項1所述之LED導光元件，其中：該LED導光元件進一步包括複數支柱設置在該入光面。
  5. 一種LED光源模組，其包括：一LED模組，該LED模組包括一電路板及一LED設置在該電路板上；以及一LED導光元件設置在該電路板上，該LED導光元件包括一入光面及一相背的出光面，該入光面具有複數內凹透鏡面，該複數內凹透鏡面由該入光面的中心向外輻射擴散排列，該複數內凹透鏡面用於擴散該LED發出之光線，該複數內凹透鏡面排列成複數同心圓，屬於同一同心圓任一直徑上相鄰內凹透鏡面之間的距離相等。
  6. 如請求項5所述之LED光源模組，其中：該出光面為平面。
  7. 如請求項5所述之LED光源模組，其中：兩個相鄰的該內凹透鏡面之間的區域為平面。
  8. 一種直下式LED電視，其包括：一LED模組，該LED模組包括一電路板及一LED設置在該電路板上； 一LED導光元件設置在該電路板上，該LED導光元件包括一入光面及一相背的出光面，該入光面具有複數內凹透鏡面，該複數內凹透鏡面由該入光面的中心向外輻射擴散排列，該複數內凹透鏡面用於擴散一個LED發出之光線，該複數內凹透鏡面排列成複數同心圓，屬於同一同心圓任一直徑上相鄰內凹透鏡面之間的距離相等；以及一顯示面板設置在該LED導光元件上方並接收透過該LED導光元件出射的光線。
TW101135872A 2012-09-28 2012-09-28 Led導光元件、led光源模組及直下式led電視 TWI539190B (zh)

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TW101135872A TWI539190B (zh) 2012-09-28 2012-09-28 Led導光元件、led光源模組及直下式led電視
US13/709,075 US8922734B2 (en) 2012-09-28 2012-12-10 Lens and LED unit using the lens and display using the LED unit

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