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TW201520657A - 側入式背光模組 - Google Patents

側入式背光模組 Download PDF

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TW201520657A
TW201520657A TW102144534A TW102144534A TW201520657A TW 201520657 A TW201520657 A TW 201520657A TW 102144534 A TW102144534 A TW 102144534A TW 102144534 A TW102144534 A TW 102144534A TW 201520657 A TW201520657 A TW 201520657A
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back cover
backlight module
light
guide plate
light guide
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TW102144534A
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Shao-Han Chang
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Hon Hai Prec Ind Co Ltd
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    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • 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
    • 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
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • 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
    • G02B6/0065—Manufacturing aspects; Material aspects
    • 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
    • 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
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133314—Back frames
    • 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
    • G02F1/133628—Illuminating devices with cooling means

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
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  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Planar Illumination Modules (AREA)

Abstract

一種側入式背光模組，包括：前框、光學膜片組、導光板、後蓋及光源基板。光學膜片組位於導光板之上，後蓋連接於前框，後蓋呈盒狀結構，導光板收容於後蓋內並用埋入成型的工藝與後蓋一體成型。後蓋包括底面與垂直連接於底面之複數側壁，底板與側壁具有高反射率，底面上設置有複數微盲孔。本發明藉由於後蓋的底面上設置複數微盲孔，使側入式背光模組出光更加均勻，並利用導光板與金屬後蓋一體成型，降低了組裝難度，進而提高了生產效率。

Description

側入式背光模組
本發明涉及一種背光模組，特別涉及一種側入式背光模組。
隨著液晶顯示產業的快速發展，各種液晶顯示面板的產品應用持續增加。惟，由於液晶顯示裝置的液晶面板不能發光，需要由背光模組來提供光源，以實現液晶面板的圖像顯示。又，由於更輕更薄的液晶顯示面板的產品不斷推陳出新，需要對背光模組進行不斷的改進，以降低其生產成本並進一步提高背光模組出光的均勻性。
一種背光模組，包括背板、設置於背板上的反射片、設置於所述背板上的膠框、依次設置於所述反射片上的導光板與光學膜片組。其中所述膠框與反射片藉由雙面膠帶固定。習知技術所述背光模組膠框、反射片以及導光板為分別注塑、製作成型後，進行組裝固定。這樣導光板與膠框之間存在組裝間隙，組裝間隙之間存在多餘的光源，會導致顯示區域有亮線風險。而且，成型後的膠框極易變形，膠框與導光板之間組裝困難，因此影響背光模組整體的組裝效率，進而降低了生產效率。另，隨著對背光模組的要求變的越來越薄，就會促使人們直接減少了導光板的厚度來達到目的，隨著導光板逐漸變薄，就有可能導致背光模組出光不均勻的後果。
鑒於上述狀況，有必要提供一種組裝簡單且出光均勻的側入式背光模組。
一種側入式背光模組，包括：前框、光學膜片組、導光板、後蓋及光源基板。光學膜片組位於導光板之上，後蓋連接於前框，後蓋呈盒狀結構，導光板收容於後蓋內並用埋入成型的工藝與後蓋一體成型。後蓋包括底面與垂直連接於底面的複數側壁，底板與側壁具有高反射率，底面上設置有複數微盲孔。
上述側入式背光模組藉由將導光板用埋入成型的工藝與金屬後蓋一體成型，降低了側入式背光模組組裝的難度，提高了生產效率。並且於後蓋的底面上設置複數微盲孔，可以形成光散射的網點，實現了側入式背光模組出光均勻性的效果。另，金屬材質的後蓋既可以遮罩電磁干擾，還可以傳導LED燈發光狀態時產生的熱量，提高LED燈的發光效率。
圖1係本發明實施例的側入式背光模組之立體分解圖。
圖2係圖1中所示的側入式背光模組之局部剖視圖。
圖3係圖1中所示的後蓋之立體示意圖。
圖4係本發明實施例的側入式背光模組之光路圖。
下面結合圖式及實施方式對本發明提供之側入式背光模組作進一步詳細說明。
請參照圖1，本發明實施例提供的側入式背光模組100，包括前框10、光學膜片組20、導光板30、盒狀結構的後蓋40及光源基板50。其中，光學膜片組20位於導光板30之上，光學膜片組20收容於前框10內，導光板30收容於盒狀結構的後蓋40內，後蓋40連接於前框10的下方，光源基板50位於後蓋40的一側並緊鄰導光板30的一個側面。
請一併參見圖2，前框10為塑膠材料製成，呈中空的矩形框架結構。前框10包括一個階梯狀的液晶面板收納部11，位於遠離後蓋40的一端，用於收納液晶面板（圖未示）。可以理解的是，液晶面板收納部11亦可為其他形狀，只要其便於收容液晶面板即可。
前框10接近後蓋40的一端，沿其外邊緣的一周開設有外沿槽12，該外沿槽12與後蓋40連接。沿與前框10外邊緣對應的內邊緣一周開設有內沿槽13，該內沿槽13與光學膜片組20連接，並用於固定光學膜片組20。
光學膜片組20包括複數光學片。優選地，複數光學片為擴散片21、棱鏡片22、棱鏡片23與擴散片24依序疊放的四片式組合。
導光板30為透明塑膠材料製成，呈矩形板狀結構，完全收納於後蓋40中。該導光板30接近光學膜片組20的一面設置為出光面31，當入射在出光面31上的光線小於出光面31的全反射的臨界角時，可以形成出射光線。反之，出光面31將大於全反射的臨界角的入射光線以全反射的形式重新反射到導光板30內。另，光學膜片組20位於出光面31之上，出光面31支撐光學膜片組20。
請一併參見圖2與圖3，後蓋40為金屬薄板材料製成，包括一底面41與與底面41垂直連接的複數側壁42。側壁42遠離底面41的一端為側壁上沿421，該側壁上沿421的尺寸與上述前框10的外沿槽12的尺寸相適應，且側壁上沿421卡持於前框10的外沿槽12內，將後蓋40與前框10固定連接。底面41與複數側壁42的內表面均具有高反射率的特性。優選地，可於底面41與複數側壁42的內表面設置一層高反射率的反射層。
後蓋40的底面41上設置有複數微盲孔411，微盲孔411呈圓形凹槽結構，微盲孔411的表面具有高反射率的反射層。複數微盲孔411呈陣列狀均勻排布於底面41上，可作為導光板30的光散射網點，從而提高了出光面31出光的均勻性。
可以理解，微盲孔411亦可以為矩形凹槽或其他形狀的凹槽，只要光線照射於微盲孔411上能夠達到散射的目的即可。微盲孔411不限於均勻分佈於底面41上，其分佈密度可以隨著與光源基板50的距離增加而增加。
上述具有高反射率的反射層可以為具有高反射率的銀膜鍍層，亦可以為高反射率的油墨塗層。但並不限於此，只要反射層具有高反射率的特性即可。
由於後蓋40本身為金屬材料，可以有效的遮罩電磁干擾。上述金屬材料的後蓋40代替了傳統背光模組為了解決電磁干擾的問題而增設的金屬板，從而實現了傳統背光模組的輕量化與薄型化。另，金屬材料還具有熱傳導的特性，故金屬後蓋40可以有效導出側入式背光模組100內發熱組件發出的熱量。
在本實施例中，導光板30採用埋入成型的工藝與後蓋40一體成型，不僅能夠提高側入式背光模組100的結構強度、提高顯示效果，還能夠將習知人工組裝背光模組的過程變成機械化的埋入成型工藝，降低了組裝的難度，從而提高了側入式背光模組100的生產效率。
光源基板50為矩形板狀結構，並貼附於後蓋40的至少一個側壁42上。該光源基板50上設有複數LED燈51，用於提供該側入式背光模組100的光源。優選地，該複數LED燈51沿光源基板50呈陣列狀排布。
複數LED燈51為發熱組件，且LED燈51的發光效率會隨著溫度升高而降低。惟，由於光源基板50貼附於金屬後蓋40的側壁42上，從而可以將熱量有效的傳導出去，提高了LED燈51的發光效率。
組裝側入式背光模組100時，首先，先將導光板30用埋入成型法與後蓋40一體成型，再將帶有LED燈51的光源基板50固定於後蓋40的側壁42上。然後，將光學膜片組20的擴散片21、棱鏡片22、棱鏡片23與擴散片24以此順序由上到下疊放在一起，並將疊放整齊的光學膜片組20設置於導光板30的出光面31上。最後，再將前框10放在光學膜片組20之上，並且後蓋的側壁上沿421卡合於前框10的外沿槽12內。完成本發明側入式背光模組100的組裝過程。
請參見圖4，本發明側入式背光模組100光線的傳播路徑為：複數LED燈51向周圍發出光線，進入導光板30內。其中一部分光線直接由導光板30的出光面31出射，另一部分光線則是照射到後蓋具有高反射率的底面41上，經過底面41上複數微盲孔411的散射作用，從而在出光面31形成較均勻的出射光線。該後蓋40的底面41與側壁42均具有全反射作用，LED燈51發出的光線藉由多次反射與微盲孔411的散射，從而可於導光板30的出光面31上形成了較均勻的出射光線。最終於光學膜片組20上形成了均勻的面光源。
本發明藉由將導光板30用埋入成型工藝與金屬後蓋40一體成型，降低了側入式背光模組100組裝的難度，提高了生產效率。在金屬後蓋40的底面41設有複數微盲孔411，且微盲孔411具有高反射率的表面，複數微盲孔411形成了光散射的網點，從而可以在光學膜片組20上形成更加均勻的面光源。金屬後蓋40的底面41與側壁42均具有高反射率，提高了側入式背光模組100的光線利用率。金屬後蓋40替代了傳統背光模組為了解決電磁干擾的問題而增設的金屬板，實現了背光模組的輕量化與薄型化。由於導光板30與後蓋40一體成型，後蓋的側壁42與導光板30的出光面31即可替代了傳統背光模組設置於導光板與後蓋側壁之間的膠框，實現了背光模組的窄邊框化。並且，該側入式背光模組100的結構簡單，組裝容易。
由於LED燈51發光狀態時會不斷產生熱量，且本實施例的側入式背光模組100的後蓋40為金屬薄板材料，金屬材料本身具有很好的熱傳導性，從而可以將LED燈51產生的熱量藉由金屬材料的後蓋40傳導出去。所以本實施例的側入式背光模組100還具有良好的散熱效果。
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‧‧‧側入式背光模組
10‧‧‧前框
11‧‧‧液晶面板收納部
12‧‧‧外沿槽
13‧‧‧內沿槽
20‧‧‧光學膜片組
21、24‧‧‧擴散片
22、23‧‧‧棱鏡片
30‧‧‧導光板
31‧‧‧出光面
40‧‧‧後蓋
41‧‧‧底面
411‧‧‧微盲孔
42‧‧‧側壁
421‧‧‧側壁上沿
50‧‧‧光源基板
51‧‧‧LED燈
無
10‧‧‧前框
11‧‧‧液晶面板收納部
12‧‧‧外沿槽
13‧‧‧內沿槽
20‧‧‧光學膜片組
30‧‧‧導光板
31‧‧‧出光面
40‧‧‧後蓋
41‧‧‧底面
411‧‧‧微盲孔
42‧‧‧側壁
50‧‧‧光源基板
51‧‧‧LED燈

Claims (10)

  1. 一種側入式背光模組，包括：前框、光學膜片組、導光板、後蓋及光源基板，所述光學膜片組位於導光板之上，所述後蓋連接於所述前框，其改良在於：所述後蓋呈盒狀結構，所述導光板收容於所述後蓋內並用埋入成型的工藝與後蓋一體成型，所述後蓋包括底面與垂直連接於底面的複數側壁，所述底板與所述側壁具有高反射率，所述底面上設置有複數微盲孔。
  2. 如申請專利範圍第1項所述之側入式背光模組，其中所述微盲孔為圓形凹槽結構且呈陣列狀分佈於後蓋的底面上，所述後蓋的底面、側壁及所述微盲孔的內表面均具有高反射率之反射層。
  3. 如申請專利範圍第1項所述之側入式背光模組，其中所述後蓋由金屬薄板材料製成。
  4. 如申請專利範圍第1項所述之側入式背光模組，其中所述導光板遠離後蓋的一面為出光面，該出光面支撐所述光學膜片組。
  5. 如申請專利範圍第1項所述之側入式背光模組，其中所述微盲孔的分佈密度隨著其與光源基板的距離增加而增加。
  6. 如申請專利範圍第1項所述之側入式背光模組，其中所述前框接近後蓋的一端開設有外沿槽與內沿槽，所述外沿槽與後蓋的側壁連接，所述內沿槽與光學膜片組的側邊連接。
  7. 如申請專利範圍第1項所述之側入式背光模組，其中所述前框遠離後蓋的一端還設有階梯狀之液晶面板收納部。
  8. 如申請專利範圍第1項所述之側入式背光模組，其中所述光源基板位於後蓋的至少一個側壁上。
  9. 如申請專利範圍第8項所述之側入式背光模組，其中所述光源基板上設置有複數LED燈。
  10. 如申請專利範圍第1項所述之側入式背光模組，其中所述光學膜片組包括層疊設置的擴散片、棱鏡片、棱鏡片與擴散片。
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