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TWI286721B - Heat-dissipating apparatus for a back light module of a liquid crystal display - Google Patents

Heat-dissipating apparatus for a back light module of a liquid crystal display Download PDF

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Publication number
TWI286721B
TWI286721B TW095128911A TW95128911A TWI286721B TW I286721 B TWI286721 B TW I286721B TW 095128911 A TW095128911 A TW 095128911A TW 95128911 A TW95128911 A TW 95128911A TW I286721 B TWI286721 B TW I286721B
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Taiwan
Prior art keywords
heat
backlight
circuit board
panel display
substrate
Prior art date
Application number
TW095128911A
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English (en)
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TW200809713A (en
Inventor
Alex Horng
Te-Chen Liu
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Sunonwealth Electr Mach Ind Co
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Priority to TW095128911A priority Critical patent/TWI286721B/zh
Priority to JP2007011265A priority patent/JP2008041638A/ja
Priority to GB0701544A priority patent/GB2440748A/en
Priority to DE102007006594A priority patent/DE102007006594A1/de
Priority to FR0753815A priority patent/FR2904749A1/fr
Application granted granted Critical
Publication of TWI286721B publication Critical patent/TWI286721B/zh
Publication of TW200809713A publication Critical patent/TW200809713A/zh

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21KNON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00Printed circuits
    • H05K1/02Details
    • H05K1/0201Thermal arrangements, e.g. for cooling, heating or preventing overheating
    • H05K1/0203Cooling of mounted components
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/60Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
    • F21V29/67Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans
    • F21V29/677Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans the fans being used for discharging
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/70Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/70Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/76Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
    • F21V29/763Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section the planes containing the fins or blades having the direction of the light emitting axis
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/70Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/83Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133602Direct backlight
    • G02F1/133603Direct backlight with LEDs
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00Printed circuits
    • H05K1/02Details
    • H05K1/0201Thermal arrangements, e.g. for cooling, heating or preventing overheating
    • H05K1/0203Cooling of mounted components
    • H05K1/021Components thermally connected to metal substrates or heat-sinks by insert mounting
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL 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
    • G02F1/00Devices 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
    • G02F1/01Devices 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 
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133628Illuminating devices with cooling means
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00Printed circuits
    • H05K1/18Printed circuits structurally associated with non-printed electric components
    • H05K1/182Printed circuits structurally associated with non-printed electric components associated with components mounted in the printed circuit board, e.g. insert mounted components [IMC]
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007Types of components
    • H05K2201/10106Light emitting diode [LED]
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/0058Laminating printed circuit boards onto other substrates, e.g. metallic substrates
    • H05K3/0061Laminating printed circuit boards onto other substrates, e.g. metallic substrates onto a metallic substrate, e.g. a heat sink

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Liquid Crystal (AREA)
  • Planar Illumination Modules (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Description

1286721 九、發明說明: 【發明所屬之技術領域】 本發明係關於一種平面顯示器之背光源散熱裝置, 特別是關於在一電路板開設至少一組裝孔,且至少一背光 單元之一導熱部係經由該組裝孔直接貼接於一散熱基板之 背面’以提升散熱效率之平面顯示器之背光源散熱裝置。 【先前技術】 習用平面顯示器之背光源散熱裝置,請參照第i圖 所示,其包含數個背光單元6、一電路板7、一支撐框架 J及一散熱基板9。該背光單元6設置於該電路板7之一 侧,且與該電路板7電性連接,以便藉由該電路板7控制 該背光單元ό提供一背光源。該背光單元6具有一基座61 、一發光元件62及至少二極片63。該基座61係設有一 容置空間〔未標示〕,以便容置定位該發光元件62及極 片63。該發光元件62係選自一發光二極體〔led〕,以 提供足夠之光源。該極片63係由一導電金屬材質製成, 該極片63係穿設於該基座61之側面,且該極片63與該 發光元件62電性連接。 請再參照第1圖所示,該電路板7係選自一軟性印 刷電路板,該背光單元6利用該極片63電性連接於該電 路板7之一側。該支撐框架8設有一容置空間80,以供 容置該背光單元6及電路板7。該散熱基板9係由鋁或銅 等高導熱能力之金屬材質製成,其結合於該支撐框架8之 一侧,以便該電路板7經由該容置空間80與該散熱基板 —5 — C:\Limta\lt Pnt\PKI0134.doc 06/08/07/01:37 P« 1286721 9相互貼接。 當該背光單元6之發光元件62產生一背光源供一平 面顯示器〔未繪示,flat panel display〕形成影像時,該發 光元件62產生之熱能經由熱傳導方式傳遞至該電路板7 ,接著再由該散熱基板9之金屬材質間接吸收該電路板7 上之熱能。由於該高導熱能力之散熱基板9之一側設有數 個鰭片構造〔未標示〕,進而增加該散熱基板9與空氣之 熱交換面積,以便快速將所吸收之熱能釋放至大氣中,進 一步達到快速冷卻降溫之功效。 一般而言,上述習用平面顯示器之背光源散熱裝置
散熱基板9進行一熱交換動作,而必須間接透過該電路板 7將該背光單元6產生之減傳導魏散熱基板9進行散 熱,以致大幅降低該背光單元6之散熱效率。再者,該電 路板7大部分係選自-雛印刷f路板,其構造之材質必 d 3有導熱旎力較低之材質〔例如··玻璃纖維等〕,導致 降低該電路板7之導熱效率,進而造成該f光單元6之散 熱效率低^。基於上述原因,其確實有必要進—步改良上 述習用平面顯示器之背光源散熱裴置。 夕電路板開設至少一組裝孔, 之一導熱部經由該組裝孔直接貼 面,以提升散熱效率。再者,該 小^於此’本發明改良上述之缺點,其储由在至 且分別將至少一背光單元 設於至少一散熱基板之背 一基座的底部具有一預定高度差, w亥導熱部相對該背光單元之 差’該預定高度差不小於於 一 6 —
M/0«/07/01:37 W 1286721 … 該組裝孔之厚度,以便該導熱部經由該組裝孔緊密的貼設 於該散熱基板之背面,進一步增進組裝可靠度。藉此,本 發明確實能有效提升背光源散熱效率,進而延長平面顯示 器之使用壽命。 ^ 【發明内容】 本發明之主要目的係提供一種平面顯示器之背光源 散熱裝置,其係藉由在至少一電路板開設至少一組裝孔, 且分別將至少一背光單元之一導熱部經由該組裝孔直接貼 • 設於至少一散熱基板之背面,使得本發明具有提升背光源 散熱效率之功效。 I々 本發明之次要目的係提供一種平面顯示器之背光源 散熱裝置,其中至少一背光單元之一導熱部相對該背光單 元之一基座的底部具有一預定高度差,以便該背光單元之, 導熱部得以經由該組裝孔緊密的貼設於該散熱基板之背面 ,使彳于本發明具有提升背光源散熱效率及組裝可靠度之功 效。 籲 根據本發明之平面顯示器之背光源散熱裝置,其包 3至少一背光單元、至少一電路板及至少一散熱基板。該背 光單元及電路板共同構成一背光源模組。該背光單元設有一 發光元件及一導熱部,該導熱部係設置於該發光元件之一 端,以吸收該發光元件產生之熱能。該電路板設置於該散 熱基板之背面,且該發光單元之導熱部係通過該電路板之 ^ 至少一組裝孔直接貼設於談散熱基板之背面,以便該散熱 基板直接吸收及驅散該背光源模組產生之熱能。 —7 — C:\Linda\K Pttt\PKI0|34. doc 0β/08/07/0|:37 Ρ« 1286721 【實施方式】 為讓本發明之上述及其他目的、特徵及優點能更明 顯易懂’下文特舉本發明之較佳實施例,並配合所附圖式 ,作詳細說明如下:
請參照第2及4圖所示,本發明第一實施例之平面 顯示器之背光源散熱裝置較佳係用以結合於一平面顯示器 a〔 flat panel display,FPD〕之背面,該平面顯示器a較 佳可選自液晶顯示器〔liquid crystal display,LCD〕或電 漿顯示器〔plasma display panel,PDP〕等,以便提供背 光之光線,同時進行散熱動作。 請參照第2及3圖所示,本發明第一實施例之平面 顯示器之背光源散熱裝置其係包含至少一背光源模組工、 一支撐框架2及至少一散熱基板3,該背光源模組丨與該 支撑框架2係緊密貼設於該散熱基板3之背面,以便對該 平面顯示器a進行散熱動作。該背光源模組丨具有至少一 背光單元11及-電路板12,該f光單元u係與該電路 板12電性連接,藉由該電路板12控制該背光單元u之 發光動作,以提供一背光源。該電路板12較佳選自一軟 性印刷電路板,但亦可選自—硬性印刷電路板。該電路板 12開設至少-組裝孔⑵’以供該背光單元u透過該組 裝孔121與該散熱基板3相貼接。 =參照第2及3圖所示,本發明第—實施例之支 擇框架2具有至少—容置空間2(),且該 侧可用以結合該散熱基板3,及其另―側可用^Μ平 —8 一 C:\Linda\PK Pat\PII0i3Cdoc 1286721 3不$ a。更詳言之,該支撐购2較佳係選擇由一高 了、性金屬或合金所製成,例純、銅、金、銀或其合金 該#仁亦可選擇由非金屬材料製成,例如塑膠或泡棉等。 2置工間2G係對應該背光賴組1之雜開設形成在 二擇框架2上,該容置空間2〇用以組裝容置該背光源 m ’以便該背光源模組1不致凸出至該支撐框架2外 0 埶π再參照帛2及3圖所示,本發明第一實施例之散 了基板3係由—高導熱性金屬或合金所製成,例如銘、銅 為,:掉金銀或其合金等。該散熱基板3之正面設有數個散熱 及數個散熱鰭片32。該散熱鰭片係相對於該 散熱基板3之縱向凸設排列於該散熱基板3之正面,且各 相4該散熱鰭片32之間係形成該散熱槽道31,該散熱 :道31、亦相對於該散熱基板3之縱向排列形成。藉由該 、槽道31及政熱鰭片32增加該散熱基板3與空氣之熱 交換面積,以驅散該散熱基板3所吸收之熱能。 、…咕再參照第2及3圖所示,本發明第一實施例之背 光疋件11各設有一基座lu、一發光元件112、至少二導 ,件113及-導熱部114。該基座ln之中心位置具有〆 容置空間〔未標示〕,其可供容設定位該發光元件112及 該導熱部114。該發光元件112較佳選自一發光二極體〔 LEf〕’特別是-白光發光二極體。該導接件113係由一 :、同導電忐力之金屬材質製成,例如銅、銀或其合金等, 該導接件113係穿設於該基座lu之側面,其一端與位於 C:\Linda\PK P«mi0l34. doc
0β/0«/Ο7/ΟΙ:37 W —9 — I2S6721 該基座111内之發光元件112電性連接,而該導接件113 之另一端用以電性連接該電路板12。該導熱部114係, 自一具咼導熱月b力之金屬或合金材質製成,例如銘、銅、 金、銀或其合金等。該導熱部114選擇設置於該基座ηι 之底部’且其一端與該發光元件112相接觸。另外,該導 熱部114之另一端相對該基座ln之底部凸出且裸露於外 部,該導熱部114與該基座in之底部形成一預定高度差 〔未標示〕,該預定高度差不小於該電路板12之組裝孔 121之厚度,且該組裝孔121之直徑係大於該導熱部H4 之直徑,以便該導熱部114恰可透過該組裝孔121貼接於 該散熱基板3之背面。 二二》‘請再參照第2至4圖所示,當使用本發明第一實施 例之平面顯示器之背光源散熱裝置時,將該支撐框架2之 一侧結合於該平面顯示器a之背面。該背光單元u之發 光元件112發射一背光源供該平面顯示器a形成影像,同 時該發光元件112亦產生廢熱。由於該背光單元η之導 熱部114對應穿過該電路板12之組裝孔121直接貼設於 該散熱基板3之背面,以致該背光單元u之導熱部114 藉由熱傳導方式吸收該廢熱之熱能,且經由該導熱部114 本身之高導熱能力,直接將熱能傳導至該散熱基板3。藉 此,本發明確實可有效提升該背光源模組1之散熱效率。 再者,請參照本案第5及6圖所示,本發明第一實 轭例係另設有數個散熱風扇b,由於該散熱槽道31及散 熱鰭片32係相對該散熱基板3形成縱向排列,因此有利 C:\Linda\ft ΡΜΜΤΕΙΟ丨% joe —10 — 0β/0β/07/0!:37 Μ 1286721 於藉由熱空氣上升之對流原理產生熱對流,以增進散熱效 率。藉此,該散熱風扇b較佳係選擇設置於該散熱基板3 之下方,且該散熱風扇b之出風口〔未標示〕亦相對該散 熱槽道31之通道方向設置,以便藉由該扇熱風扇b加速 該散熱槽道31内之空氣對流,進而提昇該散熱基板3之 散熱效率。 請參照第7至8圖所示,其揭示本發明第二實施例 多平面顯示器之背光源散熱裝置。相較於第一實施例,第 三實施例之電路板12係進一步選擇直接成型於該散熱基 板3之背面,且該電路板12預留至少一組裝孔121,該 散熱基板3之背面經由該電路板12之組裝孔121而可供 該背光單元11之導熱部114直接貼設,藉此有效提昇該 背光源模組1之散熱效率。 另外,當本發明第一實施例或第二實施例之背光單 元11經由該組裝孔121貼設於該散熱基板3之背面時, 該該背光單元11之導熱部114的結合侧可預設一焊料層 〔未、、、日示〕’透過一表面黏著技術〔Surface M〇unt Technology,SMT〕製程加熱熔融該焊料層,藉此將該背 光單元11穩m的結合於該散熱基板3之背面,以提升該 背光源模組1與該散熱基板3間之結合可靠度。另外,該 焊料層之材f較佳係選自—具高導熱能力之焊料〔例如Γ 錫膏等〕’進而增_背光源模組1與該散熱基板3間之 熱傳導效率。 如上所述才目較於第i圖之習用平面顯示器之背光 C:\Limk\PK Pftt\PK1013idoc °6/Οβ/〇7/〇|:37 η 〜11 — 1286721
源散熱裝置必賴接豸過一電路板7#-背光單元6所產 生之熱能傳導至—散熱基板9進行熱交換動作,以致大幅 降低該發光單元6之散熱效率等缺點,第2圖之本發明藉 由在該電路板12開設該組裝孔121,且分別將該背光^ 兀11之導熱部114係經由該組裝孔121直接貼接於該散 熱基板3之背面,以提升該發光單元u之散熱效率。再 者,該導熱部114相對該背光單元u之基座ln的底部 具有一預定高度差,該預定高度差不小於於該組裝孔ΐ2ι 之厚度,以便該導熱部114經由該組裝孔121緊密的貼接 缝該散熱基板3之背面,增進崎可靠度。藉此,本發明 讀實能有效提升背絲散熱料,進而延長平面顯示器之 使用壽命。 雖然本發明已利用上述較佳實施例揭示,然其並非 用以限定本發明’任何熟習此技藝者,在不脫離本發明之 精神和範圍之内,當可作各種更動與修改,因此本發明之 保護範圍當視後附之t請專·圍所界定者為準。 C:\Linda\PK Pftt\PX10I34.doc
06/08/07/01:37 PN 〜12 — 1286721 【圖式簡單說明】 第1圖:習用平面顯示器之背光源散熱裝置之分解立 體圖。 第 2圖 第 3圖 .第 4圖 第 5圖 .扉第 6圖 第 7圖 第 8圖
••本發明第一實施例之平面顯示器之背光源散 熱裝置之分解立體及放大圖。 :本發明第一實施例之平面顯示器之背光源散 熱裝置之組合剖視圖。 :本發明第一實施例之平面顯示器之背光源散 熱裝置之分解立體圖。 ••本發明第一實施例之平面顯示器之背光源散 熱裝置及散熱風扇之分解立體圖。 ••本發明第一實施例之平面顯示器之背光源散 熱裝置及散熱風扇之組合剖視及示意圖。 :本發明第二實施例之平面顯示器之背光源散 熱裝置之分解立體圖。 :本發明第二實施例之平面顯示器之背光源散 熱裝置之組合剖視圖。 【主要元件符號說明】 1 背光源模組 111基座 113導接件 12 電路板 2 支撐框架 11背光單元 112發光元件 114導熱部 121組裝孔 20 容置空間
—13 — 06/08/07/01:37 PM 1286721 3 散熱基板 31 32 散熱鰭片 6 61 基座 62 63 極片 7 8 支撐框架 80 9 散熱基板 a b 散熱風扇 散熱槽道 背光單元 發光元件 電路板 容置空間 平面顯示器 CAUndaVPC Pat\PCIOI34. doc

Claims (1)

1286721 十、申請專利範圍: ’ 1、一種平面顯示器之背光源散熱裝置,其包含: 至少一背光單元,其設有一發光元件及一導熱部,該 導熱部用以吸收該發光元件產生之熱能; 一電路板,其設有至少一組裝孔,且該電路板與該背 光單元電性連接,以構成一背光源模組; 至少一散熱基板’其中該電路板設置於該散熱基板之 馨月面’且該發光皁元之導熱部係通過該電路板之組穿 孔直接貼設於該散熱基板之背面,以便該散熱基板吸 收及驅散該背光源模組產生之熱能。 2、 依申請專利範圍第1項所述之平面顯示器之背光源散 歸置,其中該背光單元另設有—基座,其用以容置 定位該發光元件及導熱部。 3、 依申請專利範圍第丨項所述之平面顯示器之背光源散 熱裝置,其中該背光單元另設有至少二導接件,該導 • 接件一端與該發光元件電性連接,其另一端與該電路 板電性連接,以便藉由該電路板控制該發光元件提供 一背光源。 ’、 4、 依申請專利範圍第2項所述之平面顯示器之背光源散 ”、、裝置其中該導熱部之一端相對該基座之底部凸出 • 路於外部,且該導熱部與該基座之底部形成一預 • 疋同度差,該預定高度差不小於該電路板之組裝孔的 厚度。 巾θ專利範圍第1項所述之平面顯示器之背光源散 C:\Linda\K Pkt\PKIOI34.tk)c 06/08/07/01:37 PM —15 — 1286721 • -· 熱裝置,其中該組裝孔之直徑大於該導熱部之直徑, , 則更該導熱部恰可透過該組裝孔貼言史於該散熱基板之 背面。 6依申明專利範圍第i項所述之平面顯示器之背光源散 齡置另包含-讀框架,其對應該背統模組之形 狀開汉有至少一容置空間,以便組裝容置該背光源模 組。 7依申°月專利範圍第1項所述之平面顯示器之背光源散 熱裝置’其巾該f路板係直接成型於概熱基板之背 面。 8、 依申料鄕圍第1項所述之平面顯示器之背光源散 齡置,財該導熱部與該賴基板之結合侧係設有 一焊料層。 9、 依申料截圍第8項所述之平面顯示器之背光源散 熱裝置,其中該焊料層係選自一錫膏。 φ 1〇、依申請專利範圍第1項所述之平面顯示器之背光源散 熱裝置,其中該散熱基板之正面設有數個散熱鰭片及 數個散熱槽道,該散熱鰭片及散熱槽道相對該散熱基 板之縱向形成延伸,該散熱槽道用以導引空氣由下而 上縱向流動,以驅散該散熱鰭片表面之熱能。 .U、依申㈣利範圍第1項所述之平面顯示ϋ之背光源散 熱裝置,其中該電路板選自一軟性印刷電路板及一硬 , 性印刷電路板之一。 12依申巧專利範圍第!項所述之平面顯示器之背光源散 C:\Linda\K Pat\PICIOI34. doc 0«/0β/07/01:37 Ρ« —16 — 1286721 熱裝置,其中該發光元件選自一發光二極體〔LED〕 應 〇 ’ 13、依申請專利範圍第6項所述之平面顯示器之背光源散 熱裝置,其中另設有數個散熱風扇,該散熱風扇設置 於該散熱基板之下方,以提昇該散熱基板之散熱效率 〇 14、依申請專利範圍第1項所述之平面顯示器之背光源散 熱裝置,其中該導熱部係設置於該發光元件之一端。 • 15、依申請專利範圍第1項所述之平面顯示器之背光源散 熱裝置,其中該導熱部之材質係選自銘、銅、金及銀 — 0
C:\Linda\PK Pat\PKlOI34.doc ——17—— 06/08/07/01:37 PM
TW095128911A 2006-08-07 2006-08-07 Heat-dissipating apparatus for a back light module of a liquid crystal display TWI286721B (en)

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JP2007011265A JP2008041638A (ja) 2006-08-07 2007-01-22 平面ディスプレイのためのバックライト光源用熱放散デバイス
GB0701544A GB2440748A (en) 2006-08-07 2007-01-26 Heat-dissipating device for a back light source in a flat panel display
DE102007006594A DE102007006594A1 (de) 2006-08-07 2007-02-09 Wärmeableitungsvorrichtung für Hintergrund-Lichtquelle für Flachbildschirme
FR0753815A FR2904749A1 (fr) 2006-08-07 2007-03-14 Dispositif de dissipation thermique pour une source de retroeclairage

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JP2008041638A (ja) 2008-02-21
GB2440748A (en) 2008-02-13

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