200941090 九、發明說明： 【發明所屬之技術領域】 本發明係關於-種面光源裝置，特別是關於一種使從 光源單元射出的光通過導光體而輸出之面光源裝置。 【先前技術】 面光源裝置具備導光體及設置於該導光體侧面之光源 單^從該光源單元射出的光係從導光體侧面射入。導光 體係使從光源單元射出的光於内部均等擴散，肖等輸出此 擴散光以防止顯示面整個區域產生光斑。作為光源單元， 除了冷陰極放電管（CCFL)之外，有被透明樹脂（亦可含對從 半導體發光兀件射出的光進行波長轉換之螢光體）覆蓋光取 出面侧之半導體發光裝置，開發了組裝此種光源單元之面 光源裝置。 又，作為此種面光源裝置，例如，揭示於下列專利文 獻1。 專利文獻1:日本專利2007— 26916號公報 【發明内容】 在組裝前述半導體發光裝置作為光源單元之面光源袭 置中’並未注意到以下的問題點。 光源單元與導光體（射入從該光源單元射出的光）侧面 之間，必須常保持一定間隔。當半導體發光裝置之光取出 面與導光體側面之間隔大時，由於從半導體發光裝置照射 200941090 的光射入導光體側面之前會產生漏光，無法對導光體高效 率射入光’因此面光源裝置之整體亮度會降低。 又’當半導體發光裝置之光取出面與導光體側面之間 隔!時因光源單元之發光動作所帶來之發熱、使用環境 溫度之變化或吸濕而使導光體產生伸展，使導光體侧面接 觸光源單元’而對光源單元施加不必要的應力。尤其是， 由於半導體發光裝置較冷陰極放電管易發熱，因此導光體 Q 所受之不必要的應力較冷陰極放電管為明顯。又，此應力 係傳導至半導體發光裝置之透明樹脂、或電氣連接半導體 發光裝置内部之半導體發光元件之電極與半導體裝置之外 邛電極之引線、或半導體發光元件本體，產生光源單元之 損壞或特性劣化。導光體係由具有光透射性之樹脂製造， 在線膨脹率大，尤其是板厚薄，光輸出面（光取出面）大之導 光體中因光輸出面方向之熱或吸濕所造成之伸展率非常 大。 © 本發明係用以解決上述問題而構成。因此，本發明提 供一種面光源裝置，不僅能確保來自顯示面之光取出效 率且不因熱或吸濕所造成導光體尺寸變化而產生光源單 元之損壞或特性劣化。 3為解決上述問題，本發明實施例之第1特徵之面光源 農置具備.導光體；第丨光源單元，與導光體—側面相 ί向配置’將光射出至導光體__侧面；第2光源單元，與 相對向於導光體一側面之另一側面相對向配置，將光射出 導光體另冑面’第丨保持體’將導光體與第！光源單 200941090 ^之間予以機械連結2保持體，將導光體與第2光源 單元之間予以機械連結；以及底盤，内部配置有導光體、 第1光源單元、第2光源單元、帛i保持體、及第2保持 體；將第2光源單元固定於底盤，且使第丨光源單元追隨 導光體之伸縮而在底盤内部可動。 在第1特徵之面光源裝置中，較佳係，進一步具備於 第1光源單元與底盤之間追隨導光體之伸縮而伸縮的彈性 體。 一又，在第1特徵之面光源裝置t \較佳係，彈性體具 有高於底盤之熱傳導率的熱傳導率。 又，在第1特徵之面光源裝置中，較佳係，進一步具 備配置於_ i光源單元與彈性體之間，用以構裝第i光源 單元且連結於底盤’使第1光源單元之發熱傳至底盤的散 執艘。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface light source device, and more particularly to a surface light source device that outputs light emitted from a light source unit through a light guide. [Prior Art] The surface light source device includes a light guide and a light source provided on the side surface of the light guide. The light emitted from the light source unit is incident from the side surface of the light guide. The light guiding system spreads the light emitted from the light source unit evenly inside, and outputs the diffused light to prevent the entire area of the display surface from being spotted. As the light source unit, in addition to the cold cathode discharge tube (CCFL), there is a semiconductor light-emitting device in which a transparent resin (which may also include a phosphor that wavelength-converts light emitted from the semiconductor light-emitting element) covers the light extraction surface side. A surface light source device incorporating such a light source unit has been developed. Further, as such a surface light source device, for example, the following Patent Document 1 is disclosed. [Patent Document 1] Japanese Patent Laid-Open Publication No. Hei. No. 2007-26916. SUMMARY OF THE INVENTION In the assembly of the above-described semiconductor light-emitting device as a light source unit, the following problems have not been noted. The light source unit and the side surface of the light guide body (injecting light emitted from the light source unit) must always be kept at a constant interval. When the distance between the light extraction surface of the semiconductor light-emitting device and the side surface of the light guide is large, light leaks from the semiconductor light-emitting device when the light of 200941090 is incident on the side surface of the light guide, and the light guide cannot efficiently enter the light. The overall brightness of the surface light source device is reduced. In addition, when the light extraction surface of the semiconductor light-emitting device is spaced from the side surface of the light guide body, the light guide body is stretched due to heat generated by the light-emitting operation of the light source unit, or changes in the temperature of the use environment or moisture absorption, so that the light guide is guided. The body side contacts the light source unit' while applying unnecessary stress to the light source unit. In particular, since the semiconductor light-emitting device is more susceptible to heat generation than the cold cathode discharge tube, the unnecessary stress on the light guide body Q is more conspicuous than that of the cold cathode discharge tube. Further, the stress is transmitted to the transparent resin of the semiconductor light-emitting device, or the electrode of the semiconductor light-emitting element electrically connected to the inside of the semiconductor light-emitting device, and the lead of the electrode or the semiconductor light-emitting element body outside the semiconductor device, resulting in damage or characteristics of the light source unit. Deterioration. The light guiding system is made of a resin having light transmissivity, and has a large in-line expansion ratio, in particular, a sheet having a small thickness, and a light-emitting surface (light extraction surface) having a large light-extracting surface due to heat or moisture absorption in the direction of the light output surface. The rate is very large. © The present invention is constructed to solve the above problems. Accordingly, the present invention provides a surface light source device which not only ensures light extraction efficiency from the display surface but also causes damage or deterioration of characteristics of the light source unit due to dimensional changes of the light guide caused by heat or moisture absorption. In order to solve the above problems, the surface light source of the first aspect of the embodiment of the present invention is provided with a light guide body, and the second light source unit is arranged to emit light to the light guide body __ The second light source unit is disposed to face the other side surface facing the light guide body, and emits light to the other side of the light guide body. The light source unit 200941090^ mechanically connects the two holding bodies to mechanically connect the light guide body and the second light source unit; and the chassis is internally provided with a light guide body, a first light source unit, a second light source unit, and a 帛i The holder and the second holder; the second light source unit is fixed to the chassis, and the second light source unit is movable inside the chassis following the expansion and contraction of the light guide. In the surface light source device of the first aspect, it is preferable to further include an elastic body that expands and contracts between the first light source unit and the chassis following the expansion and contraction of the light guide body. Further, in the surface light source device t of the first feature, the elastic body has a thermal conductivity higher than the thermal conductivity of the chassis. Further, in the surface light source device according to the first aspect, preferably, the surface light source device of the first aspect is further provided between the light source unit and the elastic body, and the i-th light source unit is configured to be coupled to the chassis to heat the first light source unit. A loose ship that was passed to the chassis.
”、、/UL ❹ 本發明實施例之第2特徵之面光源裝置，具備：顯示 面板；導光體，與顯示面板—表面相對向配置；底盤，内 部配置有顯示面板及導光體；第i光源單元，於底盤内部 與導光體-側面相對向配置底盤，將光射出至導光體一側 面；第2光源單元’與相對向於導光體一側面之另一側面 相對向配置底盤’將光射出至導光體另__側面；第1保持 體’，導光體與第1光源單元之間予以機械連結，使第i 光原單元追隨導光體之伸縮而在底盤内部可動，以將第1 光源單元與導光體一侧面間之距離保持一定,·以及第2保 持體，將導光體與帛2光源單元之間予以機械連結，且固 200941090 定於底盤，以將第2#调is-A* 尤源單7L與導光體另一側面間之距離 保持一定。 根據本發明，能提供一 ^ U rr ΟΛ. a, -T- Μ- 1Λ- -Λ. 攸供種面光源裝置，不僅能確保來 自顯示面之光取出效率，且不因熱或吸濕所造成導光體尺 寸變化而產生光源單元之損壞或特性劣化。 【實施方式】 其次，參照圖式說明本發明一實施例。在以下所揭示 之圖式中，於相同或類似之部分附加相同或類似之符號。 不過，圖式係不意圖，與實物相異。又，在圖式相互間有 時亦含彼此尺寸關係或比例相異之部分。 又’以下所示之一實施例係表示用以將本發明之技術 思想具體化之裝置或方法，本發明之技術思想並未將各構 成零件之配置特定於下列記載。本發明之技術思想在申請 專利範圍中能加以各種變更。 [實施例] 本發明之實施例係說明本發明適用於作為面光源裝 置’具有大晝面之薄型液晶面光源裝置之例者。此外，在 以下說明中’雖說明本發明適用於具有32吋大畫面之面光 源裝置’但本發明並非限定於此畫面尺寸，亦能適用於超 過32吋畫面尺寸之薄型液晶面光源裝置或低於32时畫面 尺寸之薄型液晶面光源裝置。 [面光源裝置之整體構成] 如圖1及圖2所示，本發明一實施例之面光源裝置j 200941090 具備：顯示面板2;導光體3,與和顯示面板2之顯示面2八 相反之一表面（背面）2B相對向，設置有光輸出面（表面）3a ; 底盤（背底盤）11，設置有與和導光體3之光輸出面3a相反 之背面3C相對向之主面（底面）ητ;第i光源單元4B，設 置於底盤11之主面11T侧，以使與導光體3 一側面（圖工 中之左侧侧面，圖2中之下側底面）3B相對向的面成為光取 出面侧，使光射入導光體3之一侧面3B ;以及第i保持體 ❹5B，將導光體3與第！光源單元4B之間予以機械連結，第 1光源單元4B未固定於底盤丨丨而可相對於底盤u移動， 以使第1光源單元4B之連結部與導光體3之被連結部間之 距離保持一定。 又，面光源裝置1具備：第2光源單元4T，設置於底 盤11之主面11T側，以使與和導光體3之一側面3B相反 之另一側面（圖1中之右側側面，圖2中之上侧上面）3τ相 對向的面成為光取出面侧，固定於底盤u之主面11Τ，使 φ 光射入導光體3之另一侧面3Τ;第2保持體5Τ，用以使第 2光源單元4Τ之連結部與導光體3之被連結部間之距離保 持一定；以及彈性體7。 [導光體之構成] 導光體3係如圖2所示’在顯示面板2之一表面2Β具 有適當間隔’例如1 mm〜2mm之間隔，從相對向之光輸出面 3A之面法線方向觀察（平面觀察）’與顯示面板2之平面形 狀同樣’具有方形平面形狀之板材。又，導光體3之平面 尺寸係較顯示面板2之平面尺寸大一些。例如，32时之情 200941090 形，能使用具有短邊方向之縱（侧面3R、側面3L)為 42〇mm〜440mm，長邊方向之橫（侧面3T、側面3B)為 710mm〜730mm，厚度為4.0mm〜13.0mm的尺寸之導光體3。 此導光體3係從導光體3之長邊方向之一側面3B射入 從第1光源單元4B照射的光及從另一侧面3T射入從第2 光源單元4T照射的光而使光擴散，以使射入導光體3内部 的光於顯示面板2上成為均等，將從導光體3之光輸出面 3A均等擴散的光輸出至顯示面板2之顯示面2 A。導光體3, ❹ 能使用如此具有光透射性、耐熱性優異、且反射率低之透 明熱塑性樹脂。作為此透明熱塑性樹脂，較佳係使用例如 甲基丙烯酸（methacrylic)樹脂、丙烯酸（acryi)樹脂、聚碳酸 月曰（polycarbonate)樹脂、環狀聚稀烴（p〇iy〇iefin)樹脂，其 中’從光透射率、耐熱性、力學特性、成形性方面觀之， 實用上使用環狀聚烯烴樹脂為佳。 在導光體3之光輸出面3A之一側面3B之附近設置有 φ 第1被連結部3卜又，在導光體3之光輸出面3A之另一侧 面3T之附近設置有第2被連結部32。此處，設置第1被連 結部3 1之一侧面3B之附近及設置第2被連結部32之另一 侧面3T之附近係相當於顯示面板2之影像顯示區域（有效區 域）之外側區域（非有效區域），係從外框（besel)10之窗1〇W 到導光體3之一侧面3B及另一側面3T為止間之區域内。 如圖2所示，第1被連結部31係在導光體3之一側面 3B之附近，設置於光輸出面3A之第1中央線A-A(與導光 體3之短邊方向平行之中央線）上。此第1被連結部η係為 200941090 導光體3之第& α 央線Α-Α與第1光源單元4Β之中央之對 丰而δΧ·置。此處，银，、丄* ^ # ^ 破連結部3 1係如圖2所示，作用為 ^體之水平方向(導光體3之長邊方向)Η之伸縮起點。 :二2及第2之被連結部31、32係以此為基準，用以 «光想Γ之圖2中左半側之水平方向Η之伸縮，且控 制導光體3之圖2Φ 士/丨. 中右丰側之水平方向Η之伸縮。此處， 所謂導光體3之伸縮，传於 τ难係扣因使用面光源裝置1之環境溫 度變化或屬度變化、第1光源單元4Β及第2光源單元4Τ 之發光動作所帶來之溫度變化而對導純3產生體積膨服 或體積收縮，而使導光體3伸縮。 又，導光體3之第1被連結部3工及第2被連結部32, 係吸收因導光體3之水平方向(導光體3之長邊方向)v之伸 縮導致之從第1壶篦- /in „ *乐1及第2先源單疋4B、4T之發光面到導光體 3為止間之距離變化’且將雙方間之被定位部予以機械連 結0 〇 纟實施例中’如圖2所示’雖在導光體3之光輸出面 3Α之下邊中央設置！個第i被連結部31，同樣地，在導光 體3之光輸出面3A之上邊t央設置丨個第2被連結部 但本發明並未限定此設置個數。 此外’圖2中’符號3L係導光體3之左側面，符號3r 係導光體3之右側面。 又，本實施例尹’導光板3亦可非平坦的平板，亦可 在導光板3之表面施以點印刷，亦可在光輸出面3a及背面 3C表面具有微細圖案之槽。只要在光輸出面3a及背面3c 12 200941090 表面設置微細圖案之槽以控制光，光的利用效率就會變更 南。例如’亦可在光輸出面3A表面形成與以等間隔並排複 數個導光體3之短邊方向平行的槽，在背面化形成與以等 間隔並排複數個之導光體3之長邊方向平行之槽。 [光源單元之構成] 第1光源單元他第2光源單s4T均具備半導體發光 裝置。亦即’如圖i所示’第！光源單元4B係由成為半導 體發光裝置42之基座之基板41及基板41上之半導體發光 U 半導體發光裝置42具備：具有杯形反射之 基座45;於杯形基座45内設置丨個或複數個之半導體發光 兀件（半導體發光晶片）43 ;透明樹脂部44，被覆此半導體 發光元件43,至少對從半導體發光元件43射出的光具有光 透射性；朝外部導出之外部端子46;以及配線導體，電氣 連接半導體發光元件43之電極與外部端子46之間。本實 施例中，於1片基板41上構裝數個〜數十個半導體發光裝 置42(模組化），用以構成第1光源單元。第2光源單元 4T係與第1光源單元4B同樣，由基板41及半導體發光裝 置42構成。此外，本發明中，發光面稱為半導體發光裝置 之透明樹脂部44與其外界之界面。 [保持體之構成] 如圖1所示，第1保持體5B，在本實施例中，係將一 側（圖1中之左侧）固定於第i光源單元4B，將另一側（圖i 中之右侧）固定於導光體3之一側面3 B之附近。第1保持 體5B係在顯示面板2之非有效區域中，挾持導光體3之光 13 200941090 輸出面3A之至少一部分及與光輸出面3A相對向之背面3c 之至少一部分之兩面，將第丨光源單元4B與導光體3之間 予以機械連結。 在第1保持體5B之第1光源單元4B侧之一端設置有 定位部。此定位部係固定於設置在第丨光源單元4B之基板 41之被定位部，用以進行第！保持體5B對第i光源單元 4B之定位。 φ 又，在第1保持體5B之第1光源單元4B側之一端設 置有安裝部。此安裝部係設置於第i光源單元4B之導光體 3之光輸出面3A側及與此光輸出面3A相對向之背面3c侧 之雙方。在本實施例中’安裝部係由咬合於第t光源單元 之基板41之背面侧之爪構成。第j保持體5B係由可適 度彈性變形之材料構成。接著，安裝部係在此彈性變形之 範圍内，擴張地較基板41之寬度大，懸掛於基板41之背 面’藉此能簡易安裝於基板41。 Ο 第1保持體5B對於因第1光源單元4B之發光動作所 產生之熱或環境溫度，具有與導光體3之材料大致相同之 線膨脹係數(線膨脹率)，而且由具有對濕度變化之尺寸變化 /、導光體3之材料大致相同之对濕性之材料構成。又，較 佳係具有將從第1光源單元4B照射的光高效率傳導至導光 體二之-側面3B之高反射率，且由具有容易進行成型加工 之高加工性之材料構成。本實施例中，第1保持體5B，能 實用性地使用與導光體3相同的材料，例如聚碳酸脂樹^ 如圖1所示，又，第1保持體5B，在與導光艘3之第 14 200941090 1被連結部31對應之區域設置有第1連結部55。此第1連 結部55係固定於第1被連結部31，將第1光源單元4b與 導光體3之間予以機械連結。第1連結部55與第丨被連結 部3 1間之固定亦可使用螺桿固定、膠帶、嵌合等周知之固 定手段。 在本實施例中，第2保持體5T係將一側（圖1中之右侧） 固定於第2光源單元4T ’將另一侧（圖1中之左側）固定於 導光體3之另一側面3τ之附近。第2保持體5T係在顯示 面板2之非有效區域，挾持導光體3之光輸出面3a之至少 一部分及與光輸出面3A相對向之背面3C之至少一部分之 兩面’將第2光源單元4T與導光體3之間予以機械連結。 在第2保持體5T之第2光源單元4T側之一端設置有 定位部。此定位部係固定於設置在第2光源單元4τ之基板 41之被定位部，用以進行第2保持體5T對第2光源單元 4Τ之定位。 又’在第2保持體5Τ之第2光源單元4Τ側之一端設 置有安裝部》此安裝部係設置於第2光源單元4Τ之導光體 3之光輸出面3Α側及與此光輸出面3Α相對向之背面3c側 之雙方。在本實施例中’安裝部係由咬合於第2光源單元 4Τ之基板41之背面侧之爪構成。第2保持體5τ係由可適 度彈性變形之材料構成。接著，安裝部係在此彈性變形之 範圍内，擴張地較基板41之寬度大，懸掛於基板41之背 面’藉此能簡易安裝於基板41。 第2保持體5Τ對於因第2光源單元4Τ之發光動作所 15 200941090 產生之熱或環境溫度，具有與導光體3之材料大致相同的 線勝脹係數（線膨脹率），而且由具有對濕度變化之 盘遵 # # 2 4 ^ ^ ，、尤體3之材料大致相同之耐濕性之材料構成。又，較 佳係具有將從第2光源單元4T照射的光高效率傳導至導光 體3之另-側面3T之高反射率，且由具有容易進行成型加 =之高加工性之材料構成。本實施例中，第2保持體5T， 能實用性使用與導光體3相同材料，例如聚碳酸脂樹脂。 如圖1所示，又，第2保持體5Τ中，在與導丼艚^少 第2被連結部32對應之區域設置有第2連結部56。此第2 連結部56係固定於第2被連結部32,將第2光源單元4丁 與導光體3之間予以機械連結。第2連結部56與第2被連 結部32間之固定亦可使用螺桿固定、膠帶、嵌合等周知之 固定手段。 在本實施例中，第2保持體5Τ係將一侧（圖丨中之右侧） 口二於第2光源單元4Τ，將另一侧（圖i中之左侧）固定於 φ 導光體3之另一侧面3T之附近。 例如，32吋畫面尺寸之情形，若溫度從室溫2〇度上升 到7〇度，導光體3在長邊就會產生約27mm之延伸，在短 邊就會產生約1.5mm之延伸。又，導光體3，因吸水10/〇， 在長邊就會產生約1.1 mm之延伸，在短邊就會產生約〇7爪瓜 之延伸，因吸水2%，在長邊就會產生約31mm之延伸，在 短邊就會產生約1.8mm之延伸。亦即，若考量線膨脹係數 及吸水率，導光體3，在長邊就會產生約5 之延伸， 在短邊就會產生 3.3mm之延伸。 16 200941090 根據此種觀點，較佳係一邊吸收第1及第2之保持體 5B、5T因熱或吸濕而使導光體3伸展導致之第1光源單元 4B與導光體3之一側面3B間之距離（GAP)、及第2光源單 元4T與導光體3之另一側面3T間之距離(GAP)，一邊將該 等距離（GAP)設定在〇_ 1mm〜1 .〇mm之範圍内。本實施例之 面光源裝置1中’該等距離（GAP)係設定在〇.5mm。 [散熱體之構成] ❹The surface light source device according to the second aspect of the present invention includes: a display panel; a light guide body disposed to face the surface of the display panel; and a chassis having a display panel and a light guide body disposed therein; The i-light source unit has a chassis disposed opposite to the light guide body-side surface in the chassis to emit light to one side of the light guide body; and the second light source unit ′ is disposed opposite to the other side surface opposite to the light guide body. 'The light is emitted to the side surface of the light guide body __; the first holding body' is mechanically coupled between the light guide body and the first light source unit, and the ith optical unit is movable inside the chassis following the expansion and contraction of the light guide body. Keeping the distance between the first light source unit and one side surface of the light guide constant, and the second holder, mechanically connecting the light guide body and the 帛2 light source unit, and fixing the 200941090 to the chassis to The second #调is-A* The distance between the other source side 7L and the other side of the light guide body is kept constant. According to the present invention, it is possible to provide a ^ U rr ΟΛ. a, -T- Μ- 1Λ- -Λ. 攸For the surface light source device, not only can the light extraction efficiency from the display surface be ensured The light source unit is not damaged or deteriorated in characteristics due to the change in the size of the light guide due to heat or moisture absorption. [Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings. The same or similar symbols are attached to the same or similar parts. However, the drawings are not intended to be different from the actual ones. In addition, the drawings sometimes contain parts that differ in size or proportion from each other. The embodiment shown is an apparatus or method for embodying the technical idea of the present invention, and the technical idea of the present invention does not specify the configuration of each component in the following description. The technical idea of the present invention is in the scope of patent application. [Embodiment] The present invention is applied to an example in which the present invention is applied to a thin-type liquid crystal surface light source device having a large surface as a surface light source device. The invention is applicable to a surface light source device having a 32-inch large screen. However, the present invention is not limited to this screen size, and can be applied to a thin liquid having a screen size exceeding 32 inches. A crystal surface light source device or a thin liquid crystal surface light source device having a screen size lower than 32. [Overall Configuration of Surface Light Source Device] As shown in FIGS. 1 and 2, a surface light source device j 200941090 according to an embodiment of the present invention includes: a display panel 2; the light guide body 3, opposite to one surface (back surface) 2B opposite to the display surface 2 of the display panel 2, is provided with a light output surface (surface) 3a; a chassis (back chassis) 11 is provided with and The back surface 3C opposite to the light output surface 3a of the light body 3 is opposite to the main surface (bottom surface) ητ; the ith light source unit 4B is disposed on the main surface 11T side of the chassis 11 so as to be opposite to the light guide body 3 (Fig. The left side surface of the middle side, the lower side surface of FIG. 2) 3B faces the light extraction surface side, and the light is incident on one side surface 3B of the light guide body 3; and the i-th holding body ❹5B, the light guide body 3 With the first! The light source unit 4B is mechanically coupled to each other, and the first light source unit 4B is not fixed to the chassis 丨丨 and is movable relative to the chassis u so that the distance between the connection portion of the first light source unit 4B and the connected portion of the light guide 3 is Keep it constant. Further, the surface light source device 1 includes a second light source unit 4T that is provided on the main surface 11T side of the chassis 11 so as to be opposite to the other side surface (3 in FIG. 1) opposite to the side surface 3B of the light guide body 3. The upper surface of the upper surface of the middle surface 2 is a light extraction surface side, and is fixed to the main surface 11 of the chassis u so that φ light is incident on the other side surface 3 of the light guide 3; the second holding body 5 is used for The distance between the connection portion of the second light source unit 4A and the connected portion of the light guide 3 is kept constant; and the elastic body 7 is provided. [Configuration of Light Guide] The light guide 3 is arranged at an interval of, for example, 1 mm to 2 mm on the surface 2 of one surface of the display panel 2 as shown in Fig. 2, from the normal to the surface of the light output surface 3A. Directional observation (planar observation) 'The same as the planar shape of the display panel 2' has a square planar shape. Further, the planar size of the light guide 3 is larger than the planar size of the display panel 2. For example, at 32 o'clock, the 200941090 shape can be used with a longitudinal direction (side 3R, side 3L) of 42 〇 mm to 440 mm, and a long side (lateral 3T, side 3B) of 710 mm to 730 mm, and the thickness is Light guide body 3 having a size of 4.0 mm to 13.0 mm. In the light guide 3, light emitted from the first light source unit 4B is incident from one side surface 3B of the longitudinal direction of the light guide 3, and light emitted from the second light source unit 4T is incident from the other side surface 3T. The light is diffused so that the light incident on the inside of the light guide 3 is equalized on the display panel 2, and the light uniformly diffused from the light output surface 3A of the light guide 3 is output to the display surface 2A of the display panel 2. The light guide 3, ❹ can be a transparent thermoplastic resin which is excellent in light transmittance, heat resistance, and low in reflectance. As the transparent thermoplastic resin, for example, methacrylic resin, acrylic resin, polycarbonate resin, and cyclic poly (hydrocarbon) resin are used. From the viewpoint of light transmittance, heat resistance, mechanical properties, and formability, it is preferred to use a cyclic polyolefin resin in practice. The first connected portion 3 is provided in the vicinity of one side surface 3B of the light output surface 3A of the light guide 3, and the second side is provided in the vicinity of the other side surface 3T of the light output surface 3A of the light guide 3. Connecting portion 32. Here, the vicinity of one side surface 3B of the first connected portion 31 and the vicinity of the other side surface 3T of the second connected portion 32 are provided to correspond to the outer side of the image display area (effective area) of the display panel 2 ( The non-effective area is in the region from the window 1 〇W of the bezel 10 to the side 3B of the light guide 3 and the other side 3T. As shown in FIG. 2, the first connected portion 31 is provided in the vicinity of one side surface 3B of the light guide 3, and is provided on the first center line AA of the light output surface 3A (the center parallel to the short side direction of the light guide 3) on-line. The first connected portion η is a pair of the center of the light guide body 3 of 200941090, and the center of the first light source unit 4Β is abundance and δΧ. Here, the silver, 丄*^ # ^ broken connecting portion 3 1 functions as a stretching start point of the horizontal direction of the body (the longitudinal direction of the light guide 3). : The second and second connected portions 31 and 32 are based on this, and are used to expand and contract the horizontal direction of the left half of Fig. 2, and control the light guide 3 to Fig. 2丨. The horizontal direction of the Zhongyoufeng side is stretched. Here, the expansion and contraction of the light guide 3 is caused by the change in the ambient temperature or the change in the degree of the use of the surface light source device 1 and the light-emitting operation of the first light source unit 4 and the second light source unit 4A. The temperature changes to cause volume expansion or volume contraction of the conductive pure metal 3, and the light guide body 3 is expanded and contracted. In addition, the first connected portion 3 and the second connected portion 32 of the light guide 3 absorb the expansion and contraction of the horizontal direction of the light guide 3 (longitudinal direction of the light guide 3) v from the first篦 篦 - /in „ * The distance between the light-emitting surface of the music source 1 and the second source unit 4B, 4T to the light guide 3 is changed, and the positioned portion between the two is mechanically coupled to each other. As shown in Fig. 2, the i-th connected portion 31 is provided at the center of the light output surface 3 of the light guide 3, and similarly, the light output surface 3A of the light guide 3 is disposed at the center of the light guide 3A. The second connected portion is not limited to the number of the second connecting portions. In addition, in Fig. 2, the symbol 3L is the left side surface of the light guiding body 3, and the symbol 3r is the right side surface of the light guiding body 3. Further, this embodiment Yin' light guide plate 3 can also be a flat plate, or can be printed on the surface of the light guide plate 3, or can have a groove of fine pattern on the surface of the light output surface 3a and the back surface 3C. As long as the light output surface 3a and the back surface 3c 12 200941090 The surface of the fine pattern groove is used to control the light, and the light utilization efficiency will change to the south. For example, 'the surface of the light output surface 3A can also be formed. The grooves in which the short sides of the plurality of light guides 3 are arranged in parallel at equal intervals are formed in a groove parallel to the longitudinal direction of the plurality of light guides 3 arranged at equal intervals in the back surface. [Configuration of Light Source Unit] First Light Source The unit second light source unit s4T is provided with a semiconductor light-emitting device. That is, 'the light source unit 4B is formed by the substrate 41 which becomes the base of the semiconductor light-emitting device 42 and the semiconductor light-emitting U semiconductor on the substrate 41. The device 42 includes: a base 45 having a cup-shaped reflection; one or a plurality of semiconductor light-emitting elements (semiconductor light-emitting chips) 43 disposed in the cup-shaped base 45; and a transparent resin portion 44 covering the semiconductor light-emitting element 43 At least the light emitted from the semiconductor light emitting element 43 is light transmissive; the external terminal 46 is led out to the outside; and the wiring conductor is electrically connected between the electrode of the semiconductor light emitting element 43 and the external terminal 46. In this embodiment, one piece is used. A plurality of tens to tens of semiconductor light-emitting devices 42 (modular) are mounted on the substrate 41 to constitute a first light source unit. The second light source unit 4T is similar to the first light source unit 4B, and includes a substrate 41 and In the present invention, the light-emitting surface is referred to as the interface between the transparent resin portion 44 of the semiconductor light-emitting device and the outside thereof. [Configuration of the holder] As shown in Fig. 1, the first holder 5B is implemented in the present embodiment. In the example, one side (the left side in FIG. 1) is fixed to the i-th light source unit 4B, and the other side (the right side in FIG. i) is fixed to the vicinity of one side surface 3 B of the light guide body 3. The holding body 5B is in the inactive area of the display panel 2, and the third side of the light output surface 3A of the light guide body 3, 200941090, and at least a part of the back surface 3c opposite to the light output surface 3A, The light source unit 4B and the light guide 3 are mechanically coupled. A positioning portion is provided at one end of the first light source unit 4B side of the first holding body 5B. The positioning portion is fixed to the positioned portion of the substrate 41 disposed on the second light source unit 4B for performing the first! The holder 5B is positioned to the i-th light source unit 4B. φ Further, an attachment portion is provided at one end of the first light source unit 4B side of the first holder 5B. The mounting portion is provided on both the light output surface 3A side of the light guide 3 of the i-th light source unit 4B and the back surface 3c side opposite to the light output surface 3A. In the present embodiment, the mounting portion is constituted by claws that are engaged with the back side of the substrate 41 of the t-th light source unit. The j-th retaining body 5B is made of a material which is moderately elastically deformable. Then, the mounting portion is expanded in the range of the elastic deformation, and is wider than the width of the substrate 41, and is suspended from the back surface of the substrate 41, whereby the substrate 41 can be easily mounted. Ο The first holding body 5B has a linear expansion coefficient (linear expansion coefficient) substantially equal to the material of the light guide 3 due to heat or ambient temperature generated by the light-emitting operation of the first light source unit 4B, and has a change in humidity. The dimensional change/the material of the light guide 3 is substantially the same as the wet material. Further, it is preferable that the light emitted from the first light source unit 4B is efficiently conducted to the high reflectance of the side surface 3B of the light guide body 2, and is made of a material having high workability which is easy to be molded. In the present embodiment, the first holder 5B can be practically used of the same material as the light guide 3, for example, a polycarbonate tree as shown in Fig. 1, and a first holder 5B, and a light guide boat. In the 14th 200941090 1 of 3, the first connecting portion 55 is provided in a region corresponding to the connecting portion 31. The first connecting portion 55 is fixed to the first connected portion 31, and mechanically connects the first light source unit 4b and the light guide 3. The fixing between the first connecting portion 55 and the second connecting portion 31 may be a fixing means such as screw fixing, tape, or fitting. In the present embodiment, the second holding body 5T fixes one side (the right side in FIG. 1) to the second light source unit 4T' and fixes the other side (the left side in FIG. 1) to the light guide body 3 One side is near 3τ. The second holding body 5T is in the inactive area of the display panel 2, and holds at least a part of the light output surface 3a of the light guide 3 and at least a part of the back surface 3C facing the light output surface 3A. 4T is mechanically coupled to the light guide 3. A positioning portion is provided at one end of the second light source unit 4T side of the second holding body 5T. The positioning portion is fixed to the positioned portion of the substrate 41 provided in the second light source unit 4τ, and is used to position the second holding unit 5T with respect to the second light source unit 4''. Further, a mounting portion is provided at one end of the second light source unit 4 on the side of the second light source unit 4, and the mounting portion is provided on the light output surface 3 side of the light guide 3 of the second light source unit 4 and the light output surface. 3Α Relative to the back side of the 3c side. In the present embodiment, the mounting portion is constituted by a claw that is engaged with the back surface side of the substrate 41 of the second light source unit 4A. The second holding body 5τ is made of a material which is moderately elastically deformable. Then, the mounting portion is expanded in the range of the elastic deformation, and is wider than the width of the substrate 41, and is suspended from the back surface of the substrate 41, whereby the substrate 41 can be easily mounted. The second holding body 5 具有 has a line win coefficient (linear expansion coefficient) substantially the same as the material of the light guide 3 due to heat or ambient temperature generated by the light-emitting operation 15 200941090 of the second light source unit 4, and has a pair The humidity change plate is made of ## 2 4 ^ ^ , and the material of the body 3 is substantially the same as the moisture resistance material. Further, it is preferable that the light having high efficiency of light emitted from the second light source unit 4T is transmitted to the other side surface 3T of the light guide 3, and is made of a material having high workability which is easy to perform molding addition. In the present embodiment, the second holding body 5T can be used in the same manner as the light guide 3, for example, a polycarbonate resin. As shown in Fig. 1, in the second holding body 5, the second connecting portion 56 is provided in a region corresponding to the second connected portion 32. The second connecting portion 56 is fixed to the second connected portion 32, and mechanically connects the second light source unit 4 and the light guide 3. The fixing between the second connecting portion 56 and the second connected portion 32 may be a known fixing means such as screw fixing, tape, or fitting. In the present embodiment, the second holding body 5 is configured such that one side (the right side in the drawing) is disposed on the second light source unit 4A, and the other side (the left side in the drawing i) is fixed to the φ light guiding body. The other side of 3 is near 3T. For example, in the case of a 32-inch screen size, if the temperature rises from room temperature to 2 degrees, the light guide 3 will have an extension of about 27 mm on the long side and an extension of about 1.5 mm on the short side. Moreover, the light guide body 3 has an extension of about 1.1 mm on the long side due to water absorption of 10/〇, and an extension of about 7 claws on the short side, and 2% of the water absorption, which is generated on the long side. An extension of about 31 mm produces an extension of about 1.8 mm on the short side. That is, if the coefficient of linear expansion and the water absorption rate are considered, the light guide body 3 will have an extension of about 5 on the long side and an extension of 3.3 mm on the short side. 16 200941090 It is preferable to absorb the first light source unit 4B and one side of the light guide body 3 by stretching the light guide body 3 due to heat or moisture absorption, while absorbing the first and second holding bodies 5B and 5T. The distance between 3B (GAP) and the distance (GAP) between the second light source unit 4T and the other side surface 3T of the light guide 3 are set to 〇_1 mm to 1 mm. Within the scope. In the surface light source device 1 of the present embodiment, the equidistance (GAP) is set at 〇.5 mm. [Composition of heat sink] ❹
如圖1及圖2所示’在第丨光源單元4B與底盤“之 間設置有第1散熱體6B。第1散熱體6B係由在與底盤i丄 之主面（面光源裝置1之底面）11Τ之間與主面11T平行之第 1部分6Β1、及從第1部分6Β丨延伸至第1光源單元4Β之 基板4ΐ之背面（與構裝於基板41之第丨光源單元4Β為相 反側）為止之第2部分6Β2構成，第！散熱艎6Β之截面具 有L子形狀。又，第i散熱體6Β之第2部分與底盤 11之間设置空間70，以使導光體3因加熱或吸濕而伸展時 IX移動帛1散熱體6Β與底盤u係未固定而可以自由 移動’第1散熱體6B能相對導光體3之伸縮而在底盤u 内面滑動。第i散熱體6B能將因第丄光源單元化之發光 動作所產生的熱高效率傳導至底盤U。 本實施例中，第！ # # 弟1散熱體6B能使用熱傳導性優異且易 於進行成型加工之材祖. ,,„ 材枓。例如，第1散熱體0B能實用性地As shown in Fig. 1 and Fig. 2, a first heat radiating body 6B is provided between the second light source unit 4B and the chassis. The first heat radiating body 6B is provided on the main surface of the chassis i (the bottom surface of the surface light source device 1). The first portion 6Β1 parallel to the main surface 11T between 11Τ and the back surface of the substrate 4ΐ extending from the first portion 6Β丨 to the first light source unit 4Β (opposite to the second light source unit 4Β mounted on the substrate 41) The second part 6Β2 is configured so that the cross section of the second heat sink 6 has an L sub-shape. Further, a space 70 is provided between the second portion of the i-th heat sink 6Β and the chassis 11 so that the light guide 3 is heated or When absorbing and stretching, the IX moving 帛1 heat sink 6Β and the chassis u are not fixed and can move freely. The first heat sink 6B can slide on the inner surface of the chassis u with respect to the expansion and contraction of the light guide 3. The ith heat sink 6B can The heat generated by the illuminating action of the unitary light source unit is efficiently transmitted to the chassis U. In the present embodiment, the heat radiating body 6B of the second light source can be used with a material having excellent thermal conductivity and being easily formed. „ Material. For example, the first heat sink 0B can be practically
使用板狀銅合金。又，笛^ .A . 第1散熱體6B與第1光源單元4B 性:且具^^面之間’例如藉由具有絕緣性、具有熱傳導 、 者性之黏著性膠帶，能一邊確保絕緣性一邊 17 200941090 機械及熱的連接。 又’能在第2光源單元4T側設置與第】散熱體6b同 樣之第2散熱體6T。第2散熱體6T係由在與底盤^之主 面（面光源裝置1之上面）11Τ之間與主面UT平行之第】部 分6Τ1、及從第i部分6T1延伸至第2光源單元打之基板 41之背面（與構裝於基板41之第2光源單元4τ為相反侧） 為止之第2部分6Τ2構成，散熱體6Τ之截面具有L字形狀。 ❹ 又，如圖1所示，第1散熱體6B亦可具備第i部分6B1， 沿底盤11之主面11T，從導光體3之一側面3B側延伸到導 光體3之中央部分附近為止，第2散熱體6T亦可具備第2 部分6Τ1 ’沿底盤11之主面11Τ ’從導光體3之另一側面 3Τ側延伸到導光體3之中央部分附近為止。然而，如圖1 所示’沿伸到導光體3之中央部分附近為止之第1散熱體 6Β之第1部分6Β1與第2散熱體6Τ之第2部分6Τ1未接 觸’彼此間具有間隙，藉此第1及第2之散熱體6Β、6Τ能 ❹ 相對於底盤11之主面11Τ，可以一邊滑動一邊吸收因熱或 吸濕所造成導光體3之變化之第1光源單元4Β與導光體3 之一側面3Β、另一側面3Τ間之距離（GAP)。 [彈性體之構成]A plate-shaped copper alloy is used. In addition, the first heat dissipating body 6B and the first light source unit 4B are: and the insulating tape is provided between the surfaces of the first heat dissipating body 6B, for example, by an insulating tape having heat conductivity and heat conductivity. Side 17 200941090 Mechanical and thermal connection. Further, the second heat radiating body 6T which is the same as the first heat radiating body 6b can be provided on the second light source unit 4T side. The second heat radiating body 6T is extended from the i-th portion 6T1 to the second light source unit by a portion 6Τ1 which is parallel to the main surface UT between the main surface of the chassis (the upper surface of the surface light source device 1) 11Τ. The second portion 6Τ2 of the back surface of the substrate 41 (opposite to the second light source unit 4τ of the substrate 41) is formed, and the heat sink 6 has an L-shaped cross section. Further, as shown in FIG. 1, the first heat radiating body 6B may further include an i-th portion 6B1 extending along the main surface 11T of the chassis 11 from the side surface 3B side of the light guide body 3 to the vicinity of the central portion of the light guide body 3. The second heat sink 6T may be provided with the second portion 6Τ1' extending from the other side surface 3 of the light guide 3 to the vicinity of the central portion of the light guide 3 along the main surface 11' of the chassis 11. However, as shown in FIG. 1, the first portion 6Β1 of the first heat radiating body 6Β and the second portion 6Τ1 of the second heat radiating body 6Τ are not in contact with each other along the vicinity of the central portion of the light guiding body 3, and have a gap therebetween. Thereby, the first and second heat dissipating bodies 6Β and 6Τ can be slid with respect to the main surface 11 of the chassis 11, and the first light source unit 4 Β and the guide which can change the light guide 3 due to heat or moisture absorption can be absorbed while sliding. The distance between one side of the light body 3 and the side of the other side 3 (GAP). [Composition of Elastomers]
如圖1及圖3所示，彈性體7係設置於第1光源單元 4B’詳言之，係設置於構裝此第1光源單元4B之第1散熱 體6B與底盤11内面（面光源裝置1之下面）之間。彈性體7 係追隨導光體3之伸縮，依照從導光體3所受的應力進行 伸縮，容許在第1光源單元4B及構裝此之第1散熱體6B 18 200941090 之底盤11内移動，且藉由適當的彈性力支撐導光體3等之 拿量。 本實施例中，彈性體7進一步具備將因第1光源單元 4B之發光動作所產生的熱傳導至底盤u之作為散熱體之 功能。因此’彈性體7係由具有彈性力且熱傳導性較底盤 11優異之例如銅合金材料構成，由具有V字形截面形狀之 板彈簧構成。又’尤其是如圖3所示，彈性體7之V字形 φ 之第1散熱體6B侧之一端，增大與此第i散熱體6B間之 接觸面積，為提高熱傳導效率，由潔淨板材構成。又，彈 性體7之底盤1 1侧之另一端係從第1散熱體6B將熱高效 率傳導至底盤11，為不易拾取雜訊，由梳形形狀構成。 [筐體之構成] 如圖1及圖2所示，在面光源裝置】中，藉由設置於 顯示面板2側之外框10及設置於導光體3側之底盤丨丨構 成裝置整體之筐體’在藉由此外框1〇及底盤丨丨構成之值 〇 體内部，設置有前述之顯示面板2、導光體3、第1光源單 元4B、第2光源單元4T、第i保持體5B、第2保持體5丁、 第1散熱體6Β、第2散熱體6Τ、及彈性體7。又，第2光 源單元4Τ側之導光體3之區域（圖2之導光體3之第2中央 線Β-Β之第2光源單元4Τ侧之區域）或第2光源單元斗丁係 固定於底盤11。此外，當在第2光源單元4丁侧之導光體3 之區域與底冑11目冑時，較佳係盡量在靠近帛2光源單元 4Τ之區域固定於底盤u。藉由與第】光源單元化相反側 之導光體3之區域或第2光源單元4丁如此固定於底盤u， 19 200941090 此固定部位成為導光體3之垂直方向v之你& + v之伸縮起點。作為 固定手段，能使用嵌合、螺桿固定等手段。 本實施例中’外框H)係由能易於進行成型加工之例如 樹脂材料或銘等金屬材料構成。又’底盤U係由私傳導性 優異、㊣易於成型加I、機械強度優異且價廉之材料之例 如鋁等金屬材料構成。 [面光源裝置之特徵（動作）] 其次，使用圖i至圖2簡單說明本實施例之面光源裝 置1之動作。 首先，在面光源裝置1中，例如隨著顯示面板2之顯 示動作之開始，開始第i光源單元4B及第2光源單元4τ 之發光動作。藉由此第1光源單元4Β及第2光源單元4τ 之發光動作，使從第1光源單元4Β照射的光從導光體3之 一側面3Β擴散到導光體3之内部，使從第2光源單元4Τ 照射的光從導光體3之另一側面3Τ擴散到導光體3之内 Q 部。該等光係從導光體3之光輸出面3Α輸出，此輸出光係 從顯示面板2之背面2Β透射過顯示面板2而輸出。其結果， 在顯示面板2之影像顯示面2Α能顯示具有均勻且鮮明亮度 的光。 此處，只要第1光源單元4Β及第2光源單元4Τ之發 光動作開始，就會以此第i光源單元4Β及第2光源單元4Τ 為中心，因發光動作而在其周圍產生熱。由於此熱之產生 而使導光體3產生體積膨脹。 由於導光體3之第1中央線A_ a上之第1被連結部3卜 20 200941090 第2被連結部32係與第i保持體之第丄連結部Η、第 保持體5T之第2連結部56固定，第2光源單元4T侧之 導光體3之區域或第2光源單元灯係與底盤u固定因 此第1被連結部3卜第2被連結部32成為導光體3之垂直 方向v之延伸起點。因此，即使因導光體3之艘積膨服而 產生伸展，亦能藉由第丨光源單元4B與彈性體7在底盤U 内面可以滑動，而能抑制從導光體3之垂直方向V之延伸 〇 ^第1及第2之光源單元4Β、4Τ之各透明樹脂部44到導 光體3之侧面3Β及另一侧面3Τ為止之距離（GAp)變小。 又，因第1及第2光源單s4B、4T之發光動作而產生 f熱係通過散熱體6及彈性體7而傳導至底盤丨丨側。因此， 月t減v導光體3之第】及第2光源單元、灯附近之溫度 上升。又，第1散熱體6Β亦隨著第j及第2光源單元4Β、 4Τ而移動，藉此能抑制第丨及第2光源單元、々I之移 動所帶來之散熱性之降低。如以上所述，由於能抑制溫度 Ο 上升，因此能使導光體3整體之溫度分布均勻化，能防止 產生從光照射面3Α所輸出之光斑。 此處，雖說明面光源裝置1之溫度上升所帶來之導光 體3之延伸時之動作，但t帛1光源單元4Β及帛2光源單 兀4T之發光動作結束，因溫度降低而使導光體3產生收縮 時之動作係與上述說明相反的動作，因此該相反的動作說 明予以省略。又，當導光體3因吸水而產生伸縮時，第j 及第2光源單元4B、4T及第1散熱趙6B之動作係與上述 同樣，因此此處之說明予以省略。 21 200941090 如以上說明，在如此構成之本實施例之面光源裝置！ 中’不僅能確保來自顯示面之光取出效率，並且不會因過 熱或吸濕使導光體3之尺寸變化而產生第1光源單元4B及 第2光源單元4T之損壞或特性劣化。 又’在本實施例之面光源裝置1中，由於具備第丨散 熱體6B，用以使因第丨光源單元4B之發光動作所產生的 熱傳導至底盤11，因此能防止產生光斑。 ©[其他實施例] 如以上所述’雖藉由一實施例來揭示本發明，但構成 此揭示一部分之論述及圖式並非限定本發明者。本發明能 適用於各種代替實施形態、實施例及運用技術。例如，本 發明基本上能適用於具有背光單元（背光裝置）或照明單元 (…、明裝置）之面光源裝置，能適用於例如照片或海報背面安 裝背光單元之顯示器（具有背光單元之看板）等。 又，亦可於侧面3R或側面3L設置光源單元與彈性體乃 Φ 本發明不僅能確保來自顯示面之光取出效率，而且能 ^泛利用於不因熱或吸濕使導光體之尺寸變化而產生光源 單元之損壞或特性劣化之面光源裝置。 【圖式簡單說明】 圖1係本發明實施例之面光源裝置之截面圖（用圖2所 不之F1-F1截斷線所截斷之截面圖）〇 圖2係實施例之面光源裝置之俯視圖。 圖3係實施例之面光源裝置之彈性體之主要部分立體 22 200941090As shown in FIG. 1 and FIG. 3, the elastic body 7 is provided in the first light source unit 4B'. In detail, the elastic body 7 is disposed on the first heat radiating body 6B of the first light source unit 4B and the inner surface of the chassis 11 (surface light source device). Between 1 and below). The elastic body 7 follows the expansion and contraction of the light guide 3, and expands and contracts in accordance with the stress received by the light guide 3, and is allowed to move in the first light source unit 4B and the chassis 11 in which the first heat radiator 6B 18 200941090 is assembled. And the amount of the light guide 3 or the like is supported by an appropriate elastic force. In the present embodiment, the elastic body 7 further has a function of transmitting heat generated by the light-emitting operation of the first light source unit 4B to the chassis u as a heat sink. Therefore, the elastic body 7 is made of, for example, a copper alloy material having an elastic force and excellent thermal conductivity compared to the chassis 11, and is composed of a leaf spring having a V-shaped cross-sectional shape. Further, in particular, as shown in FIG. 3, one end of the first heat sink 6B side of the V-shape φ of the elastic body 7 increases the contact area with the ith heat sink 6B, and is made of a clean sheet material for improving heat transfer efficiency. . Further, the other end of the chassis 1 1 side of the elastic body 7 is thermally radiated from the first heat radiating body 6B to the chassis 11, and is formed of a comb shape so as to be difficult to pick up noise. [Structure of the housing] As shown in FIG. 1 and FIG. 2, in the surface light source device, the entire frame 10 and the chassis provided on the side of the light guide 3 are provided on the display panel 2 side. The display panel 2, the light guide 3, the first light source unit 4B, the second light source unit 4T, and the i-th holding body are provided inside the casing of the casing 1 and the chassis 丨丨. 5B, the second holding body 5, the first heat sink 6Β, the second heat sink 6Τ, and the elastic body 7. Further, the region of the light guide 3 on the side of the second light source unit 4 (the region on the side of the second light source unit 4 on the second center line of the light guide 3 in Fig. 2) or the second light source unit is fixed. On the chassis 11. Further, when the region of the light guide 3 on the side of the second light source unit 4 is viewed from the bottom 11 , it is preferably fixed to the chassis u as close as possible to the region of the 光源 2 light source unit 4 . The region of the light guide 3 opposite to the light source unitization or the second light source unit 4 is thus fixed to the chassis u, 19 200941090. The fixed portion becomes the vertical direction v of the light guide 3 to you & + v The starting point of the telescope. As the fixing means, means such as fitting or screw fixing can be used. In the present embodiment, the "outer frame H" is made of a metal material such as a resin material or a metal which can be easily subjected to molding processing. Further, the chassis U is made of a metal material such as aluminum which is excellent in private conductivity, is easy to be molded, and has excellent mechanical strength and is inexpensive. [Features (Operation) of Surface Light Source Device] Next, the operation of the surface light source device 1 of the present embodiment will be briefly described using Figs. First, in the surface light source device 1, for example, the light-emitting operation of the i-th light source unit 4B and the second light source unit 4τ is started in accordance with the start of the display operation of the display panel 2. By the light-emitting operation of the first light source unit 4A and the second light source unit 4τ, the light irradiated from the first light source unit 4 is diffused from the side surface 3 of the light guide 3 into the inside of the light guide 3, so that the second light is emitted from the second light source unit 4 The light irradiated by the light source unit 4A is diffused from the other side surface 3 of the light guide 3 to the Q portion inside the light guide 3. The light is output from the light output surface 3 of the light guide 3, and the output light is transmitted from the rear surface 2 of the display panel 2 through the display panel 2. As a result, light having uniform and bright brightness can be displayed on the image display surface 2 of the display panel 2. Here, as long as the light-emitting operation of the first light source unit 4A and the second light source unit 4A is started, heat is generated around the i-th light source unit 4A and the second light source unit 4A by the light-emitting operation. The light guide 3 is caused to expand in volume due to the generation of this heat. The first connected portion 3 on the first center line A_ a of the light guide 3 is the second connected portion 32 and the second connected portion of the i-th retaining body and the second connecting portion of the first holding member 5T The portion 56 is fixed, and the region of the light guide 3 on the second light source unit 4T side or the second light source unit lamp system and the chassis u are fixed. Therefore, the first connected portion 3 and the second connected portion 32 are perpendicular to the light guide 3 . The starting point of v. Therefore, even if the stretching is caused by the expansion of the light guide body 3, the inner surface of the chassis U can be slid by the second light source unit 4B and the elastic body 7, and the vertical direction V from the light guide body 3 can be suppressed. The distance (GAp) of each of the transparent resin portions 44 of the first and second light source units 4A and 4B to the side surface 3Β and the other side surface 3Τ of the light guide 3 is reduced. Further, due to the light-emitting operation of the first and second light source sheets s4B and 4T, the f-heat is transmitted to the chassis side by the heat sink 6 and the elastic body 7. Therefore, the temperature of the light source 3 and the second light source unit and the vicinity of the lamp rises. Further, the first heat radiating body 6 is moved along with the jth and second light source units 4A and 4B, whereby the heat dissipation of the third and second light source units and the movement of the crucible I can be suppressed. As described above, since the temperature Ο rise can be suppressed, the temperature distribution of the entire light guide 3 can be made uniform, and the light spot output from the light irradiation surface 3 can be prevented from being generated. Here, although the operation of extending the light guide body 3 due to the temperature rise of the surface light source device 1 is described, the light-emitting operation of the light source unit 4A and the light source unit 4T of the 帛2 is completed, and the temperature is lowered. The operation when the light guide 3 is contracted is the reverse of the above description, and therefore the description of the opposite operation will be omitted. Further, when the light guide 3 expands and contracts due to water absorption, the operations of the jth and second light source units 4B and 4T and the first heat radiation portion 236B are the same as described above, and thus the description thereof will be omitted. 21 200941090 As described above, the surface light source device of the present embodiment thus constructed! The middle portion not only ensures the light extraction efficiency from the display surface, but also causes the first light source unit 4B and the second light source unit 4T to be damaged or deteriorated due to the change in the size of the light guide 3 due to overheating or moisture absorption. Further, in the surface light source device 1 of the present embodiment, since the second heat dissipating body 6B is provided to allow heat generated by the light-emitting operation of the second light source unit 4B to be transmitted to the chassis 11, it is possible to prevent the occurrence of flare. The invention is disclosed by way of example only, and is not intended to limit the invention. The present invention is applicable to various alternative embodiments, examples, and operational techniques. For example, the present invention is basically applicable to a surface light source device having a backlight unit (backlight device) or a lighting unit (..., a bright device), and can be applied to, for example, a display in which a backlight unit is mounted on a photo or a poster (a kanban having a backlight unit). Wait. Further, the light source unit and the elastic body may be provided on the side surface 3R or the side surface 3L. Φ The present invention can not only ensure the light extraction efficiency from the display surface, but also can be utilized for not changing the size of the light guide body due to heat or moisture absorption. A surface light source device that causes damage or deterioration of characteristics of the light source unit. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a surface light source device according to an embodiment of the present invention (a cross-sectional view taken along the line F1-F1 of FIG. 2). FIG. 2 is a plan view of the surface light source device of the embodiment. . Figure 3 is a perspective view of the main part of the elastomer of the surface light source device of the embodiment 22 200941090
【主要元件符號說明】 1 面光源裝置 2 顯示面板 2A 顯示面 2B 表面（背面） 3 導光體 3A 光輸出面 3B 導光體一侧面 3C 背面 3L 左側面 3R 右側面 3T 導光體另一侧面 4B 第1光源單元 4T 第2光源單元 5B 第1保持體 5T 第2保持體 6B 第1散熱體 6B1 第1部分 6B2 第2部分 6T 第2散熱體 6T1 第1部分 6T2 第2部分 200941090 7 彈性體 10 外框 10W 窗 11 底盤 31 第1被連結部 32 第2被連結部 41 基板 42 半導體發光裝置 43 半導體發光元件 44 透明樹脂部 45 基座 46 外部端子 55 第1連結部 56 第2連結部 70 空間 ❹ 24[Main component symbol description] 1 Surface light source device 2 Display panel 2A Display surface 2B Surface (back surface) 3 Light guide 3A Light output surface 3B Light guide body side 3C Back surface 3L Left side surface 3R Right side surface 3T Light guide body Other side 4B First light source unit 4T Second light source unit 5B First holding body 5T Second holding body 6B First heat sink 6B1 First part 6B2 Second part 6T Second heat sink 6T1 Part 1 6T2 Part 2 200941090 7 Elastomer 10 outer frame 10W window 11 chassis 31 first connected portion 32 second connected portion 41 substrate 42 semiconductor light-emitting device 43 semiconductor light-emitting device 44 transparent resin portion 45 susceptor 46 external terminal 55 first connecting portion 56 second connecting portion 70 Space ❹ 24